US20050193412A1 - Potable water heater and method of using same - Google Patents
Potable water heater and method of using same Download PDFInfo
- Publication number
- US20050193412A1 US20050193412A1 US11/005,882 US588204A US2005193412A1 US 20050193412 A1 US20050193412 A1 US 20050193412A1 US 588204 A US588204 A US 588204A US 2005193412 A1 US2005193412 A1 US 2005193412A1
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- 238000000034 method Methods 0.000 title claims description 17
- 235000012206 bottled water Nutrition 0.000 title abstract description 49
- 239000003651 drinking water Substances 0.000 title abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000005236 sound signal Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 69
- 239000000446 fuel Substances 0.000 abstract description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 70
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 35
- 230000001351 cycling effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000153 supplemental effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2203—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners
- B60H1/2209—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners arrangements of burners for heating an intermediate liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2246—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant obtaining information from a variable, e.g. by means of a sensor
- B60H2001/2253—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant obtaining information from a variable, e.g. by means of a sensor related to an operational state of the vehicle or a vehicle component
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2259—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant output of a control signal
- B60H2001/2262—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant output of a control signal related to the period of on/off time of the heater
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2268—Constructional features
- B60H2001/2287—Integration into a vehicle HVAC system or vehicle dashboard
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/08—Electric heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/26—Internal combustion engine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Definitions
- This invention relates to a heater and, more particularly, to a heater finding particular application in recreational vehicles, boats and the like where heated potable water is required and where heating for the vehicle or boat is required from time to time.
- the fuel powered heater used for heating fluid be supplemented or replaced by an AC powered heater if there is a source of AC power available. This might be the case where the boat is docketed and AC power is available or where the recreational vehicle is in an RV park where AC power is available.
- WO 99/61884 (Rixen), published Dec. 2, 1999 and entitled HEATING SYSTEM FOR POTABLE WATER AND RELATIVELY SMALL AREAS, teaches a heating system used to heat a recreational vehicle which system is also used to heat potable water. This system is an advance in an attempt to achieve potable water and space heating with an integrated system.
- Rixen teaches a supplemental heater and a heat exchanger, which supplemental heater heats a second liquid independent from the heating of the first fluid.
- the use of two powered heaters to heat two fluids, one for each fluid, is costly and creates additional servicing and maintenance problems.
- Rixen's apparatus is not operated automatically. He requires manual operation of the components of his heating system which manual operation is often very inconvenient.
- a heating system for a boat or vehicle living environment comprising a first source of heat for a first fluid and a second source of heat for said first fluid, at least one space heater within which said first fluid circulates to provide heat to said living environment, a valve to allow said first fluid to bypass said at least one space heater or to allow said first fluid to flow through said at least one space heater, said valve being controlled by a thermostat to allow said first fluid to circulate through said space heater when said thermostat indicates heat is needed in said living environment and to bypass said space heater when said thermostat indicates heat is not required by said living environment.
- a water heating system for a vehicle or boat comprising a heater fluid loop with heater fluid therein, an engine circuit with engine fluid therein, a space heating loop used for heating a living environment and being operable to allow said heater fluid to circulate therein, a first heat source to heat said engine fluid, a second heat source to heat said heater fluid, a valve to route said heater fluid through said space heating loop or to bypass said space heating loop, said valve being operably connected to a thermostat for measuring the temperature of said living environment to be heated and for instructing said valve to route said heater fluid through said space heating loop or to bypass said space heating loop.
- a heating system for heating an environment within a boat or vehicle, said heating system comprising a first heater, a first fluid circulating through said first heater and a potable water heat exchanger, a second fluid circulating through said potable water heat exchanger and being heated by said first fluid in said potable water heat exchanger, said second fluid being potable water.
- a heating system for heating an environment within a boat or vehicle, said heating system comprising a fuel powered heater, a heater fluid line carrying fluid circulating through said fuel powered heater, a pump to circulate heater fluid through said heater fluid line, said heater fluid in said heater fluid line being heated by said fuel powered heater, said heater fluid line extending though at least one space heater in a living environment, said heater fluid in said space heater providing heat to said living environment and a temperature sensor to sense the temperature of said living environment and to control the ingress of said heater fluid into said space heater or to bypass said space heater according to said temperature sensed by said temperature sensor and a potable water heat exchanger having an aquastat and a potable water line carrying potable water associated therewith, said heater fluid line extending through said potable water heat exchanger and exchanging heat with said potable water in said potable water line, said aquastat controlling the operation of said fuel powered heater.
- apparatus for displaying system status in a text and numerical form for a water heating system used in a boat or vehicle comprising a micro-controller for converting hexadecimal data or serial communications received from a control board into a text and/or numerical user friendly format display, said apparatus displaying the status of said components of said water heating system and for displaying faults associated with said components of said water heating system.
- a method for displaying in a user friendly format text and numerical information relating to a water heating system used in association with a vehicle or boat comprising visually displaying said text and numerical information in said user friendly format on a display, intermittently interrogating a control board connected to components of said water heating system, determining whether a fault is present which fault is associated with individual ones of said components, converting said fault information to said text and numerical information in said user friendly format and displaying said text and numerical information in said user friendly format on said display.
- a method for displaying user friendly text and numeral information relating to a water heating system on a vehicle or boat comprising positioning a display device for visually displaying said user friendly text and numerical information for viewing by a user in a convenient location for said user, continuously interrogating a control board connected to components of said water heating system, determining whether a fault is present which fault is associated with individual ones of said components, converting said fault information to said user friendly text and numerical information and displaying said user friendly text and numerical information on said display device.
- FIG. 1 is a diagrammatic overall view of the fluid and potable water heating system according to a first aspect of the invention in which an optional potable water tank is used for holding heated potable water;
- FIG. 2 is a diagrammatic overall view of the heating system similar to that of FIG. 1 but illustrating electrical apparatus for heating fluid wherein no potable water storage tank is illustrated;
- FIG. 3 illustrates a wiring diagram for the systems illustrated in FIGS. 1 and 2 ;
- FIG. 4 is a schematic illustrating the diagnostics for the systems illustrated in FIGS. 1 and 2 ;
- FIG. 5 appearing on seven (7) pages with nine (9) accompanying sheets, is an electronic diagram showing in greater detail the control board of FIG. 3 accompanied by sheets 1 - 9 which are enlarged portions of FIG. 5 and which collectively are identical of FIG. 5 ;
- FIG. 6 illustrates the circuit for the flame sensor of FIG. 3 ;
- FIG. 7 sets out the diagnostic codes for the heating system displayed by the main control board according to the invention.
- FIG. 8 illustrates the diagnostic code interpretations as displayed on the LCD associated with the remote control panel.
- the heating system 100 conveniently utilises glycol fluid circulated through a glycol circuit 101 and potable water circulated through a potable water circuit 102 , although other liquids could conveniently also be used within the glycol circuit 101 .
- a heater sold under the trademark HURRICANE® and marketed by International Thermal Research Ltd. of Richmond, British Columbia, Canada has proven useful for this application.
- a heat exchanger 104 is conveniently used to exchange heat from the glycol fluid in the glycol circuit 101 to the potable water in the potable water circuit 102 .
- a potable water heater and storage tank 106 is provided to heat the potable water although it is optionally provided in the configuration of FIG. 1 .
- a pump 110 moves the glycol through the glycol circuit 101 and isolation valves 107 are provided to terminate or allow flow of the glycol through the glycol circuit 101 .
- a single thermostat 131 ( FIG. 1 ), in the event a single heating zone is heated or a plurality of thermostats 130 ( FIG. 2 ) in the event a plurality of heating zones are heated, monitor the temperature of the living space or environment of the vehicle or boat.
- Aquastats 123 , 132 adjustable as desired, are provided to monitor the temperatures within the potable water heater 106 and the engine fluid circuit 113 , respectively, and to send appropriate temperature information to the main control board 115 .
- An engine pump 153 ( FIG. 2 ) circulates water in the engine circuit 113 as will be described. Cycling aquastats 152 ( FIG.
- an additional one being used as a failsafe backup aquastat, used with the AC powered wire coils 122 are positioned within the annulus of the fluid heater 103 and are operable to maintain the potable water at approximately 150 deg. F., the aquastats 152 having a range of about 10 deg. F.
- a pair of high temperature aquastats 154 shut down the power supplied to the AC powered coils 122 if the temperature of the fluid exceeds 200 deg. F. for safety purposes.
- the glycol circuit 101 includes a winter loop circuit 105 to heat the space or zones within which the various space heaters 142 are located and a summer loop circuit 108 which bypasses the winter loop circuit 105 according to the position of three way directional valve 109 which valve 109 is manually or conveniently automatically operated by, for example, adjustable thermostat 131 or thermostats 130 ( FIG. 2 ) which measure the environment or living space temperature. If the temperature of the space is below that desired by the user, three way valve 109 will allow the heated glycol to circulate through the winter loop 105 . If the temperature is above the desired user temperature as measured by thermostat 131 , three way valve 109 will bypass the winter loop 105 and pass the glycol directly to summer loop 108 thereby avoiding a temperature increase in the living environment of the vehicle or boat.
- the heat provided to the potable water through heat exchanger 104 will be more efficiently used and the temperature increase of the potable water will be more quickly achieved such as would be desirable, for example, if hot water was suddenly needed.
- An expansion tank 111 and an overflow tank 114 are associated with the glycol circuit 101 .
- a heat exchanger 121 is provided between the glycol circuit 101 and the engine fluid circuit 113 to allow heat to be exchanged between the two circuits 101 , 113 in the event the engine is operating such that the fluid heater 103 is not required.
- a mixing valve 133 is provided in the potable water circuit 102 to allow for the desired water temperature in circuit 125 due to mixing the cold water provided by the inlet circuit 126 prior to heating the potable water in heat exchanger 104 or potable water heater 106 and the heated water emanating from the heat exchanger 104 or potable water heater 106 .
- a main control panel 115 (seen in more detail in FIG. 5 ) is used to control the various components of the overall water heating system 100 and is further used to interrogate the components so as to display any problem or fault associated with the various components.
- a remote control 124 with an associated. LCD display 151 may be operably associated with the main control panel 115 and mounted for operation at a location more user convenient than that occupied by the main control panel 124 .
- a wiring harness 116 (see also FIG.
- Fuel lines 140 are used to provide fuel to and allow fuel to leave heater 103 .
- An air intake duct 141 supplies combustion air to the fluid heater 103 and an exhaust duct 145 allows for exhaust to the ambient surroundings through a muffler 143 .
- the LCD display 151 provided on the remote control 124 displays text and number relating to the operating conditions and heater system diagnostics as will be described.
- the display format is user friendly in a text and numerical form and may include servicing information and advertising.
- a first technique for heating glycol fluid passing through the fluid heater 103 where it is not desired to utilise the fluid fuel powered heater 103 such as when an AC power source is available is to use a set of wire coils 122 which coils 122 are easily attached to and removed from the circumference of the fluid heater 103 and which are heated by passing AC power through the coils 122 when desired.
- a diagnostic system used for the system diagnostics is generally illustrated at 116 in FIG. 4 .
- the result of the diagnostics is displayed by LCD display 151 which diagnostic display 151 will be described in greater detail.
- the diagnostic codes for the heater 103 are illustrated in FIG. 7 . These diagnostic codes are displayed on the main control board 115 by numeric display 160 ( FIGS. 1 and 5 ).
- the numeric display 160 is converted to the textual and numerical display of FIG. 8 on LCD 151 by a micro-controller associated with the remote control 124 .
- the wiring diagram used for the systems of FIGS. 1 and 2 is shown generally at 112 in FIG. 3 .
- a service switch 120 provides power to the main control board 115 .
- a remote switch 117 ( FIG. 4 ) allows the user to remotely control the operation of the fluid heater 103 .
- the flame sensor circuit is generally illustrated at 127 in FIG. 6 and is used for sensing the presence or absence of a flame in the fluid heater 103 .
- the flame sensor circuit 162 is illustrated and described in detail in our pending U.S. patent application Ser. No. 09/579,444 filed May 26, 2000, the contents of which are herein disclosed by reference.
- the AC power source 134 is intended to heat and to maintain the potable water within the temperature range of 150 deg. F. and 205 deg. F. as defined by cycling aquastats 152 and high temperature or limit aquastats 154 ( FIG. 2 ). In the event the temperature of the fluid measured by the aquastats 152 falls below 150 deg. F., the wire coils 122 will commence operation and draw AC power from the AC power source 134 .
- the AC heater coils 122 form an independent heat source for the fluid in the glycol circuit 101 .
- the cycling aquastats 152 are normally closed when the temperature is below 150 deg. F. and allow the flow of AC power.
- the aquastats 152 open when the temperature of the fluid exceeds 150 deg. F. thereby shutting down the power. There is an approximate 10 deg. Temperature range of the cycling aquastats 152 .
- High temperature or safety limit aquastats 154 terminate. AC power flow to the coils 122 .
- aquastats 161 , 132 become relevant. If either of aquastats 161 or 132 are closed thereby to indicate that heat is available, fluid pump 110 will be activated and the glycol will circulate through the fluid heater 103 and potable water heat exchanger 104 without the operation of fluid heater 103 being necessary. If aquastat 161 opens thereby indicating the temperature has dropped below 100 deg. F., it is apparent the heat created by the coils 122 is insufficient. Accordingly, the pump 110 will terminate and the fuel heater 103 will commence operation assuming main and remote switches 120 , 117 , respectively, are in the “ON” position. When the temperature of the glycol exceeds 100 deg. F., as measured by aquastat 161 , the pump 110 will again commence operation.
- the heat provided from the engine forms a third independent source of heat for the heating system 100 in the event the engine is operating.
- aquastat 132 will be sensing the temperature in heat exchanger 121 . If heat is required as indicated by thermostats 130 or by aquastat 123 on potable water heat exchanger 104 , then pump 110 will commence operation when aquastats 132 or 161 indicate heat is available from either the engine or the fuel powered heater 104 , and the glycol in glycol circuit 101 will be heated in the engine heat exchanger 121 and provide the requested heat to any or all of the space heaters 142 and potable water heat exchanger 104 .
- thermostats 130 When the thermostats 130 indicate no heat is required in the winter loop 105 , three way directional valve 109 will terminate flow through the winter loop 105 and the heated glycol will flow only through the potable water heat exchanger 104 .
- aquastat 123 indicates the potable water is at 150 deg. F. or above, the pump 110 will terminate operation.
- thermostat 131 FIG. 1
- thermostats 130 FIG. 2
- the circulation of glycol through the winter loop 105 will continue until the temperature sensed by thermostat 151 or one of the thermostats 130 reaches the desired user value at which point the three-way directional valve 109 will terminate flow through the winter loop 105 and initiate glycol flow only through the summer loop 108 thereby avoiding any additional heat emanating from the heaters 142 in the winter loop 105 and providing heat solely to heat the potable water through heat exchanger 104 which is a more efficient use of the heated glycol in the glycol circuit 101 .
- Aquastat 132 which is associated with heat exchanger 121 , will be monitoring the temperature of the fluid in the engine circuit 113 . In the event aquastat 132 senses a temperature of greater than 120 deg. F., it will signal the control board 115 that heat is available from the engine circuit 113 . If the aquastat 123 associated with heat exchanger 104 indicates water temperature below 150 deg.
- pump 110 will commence operation and circulate the glycol within the glycol circuit 101 thereby picking up heat from the engine fluid by way of heat exchanger 121 until the potable water temperature returns to a temperature of greater than 150 deg. F. at which point pump 110 will cease operation. Ordinarily, engine operation will suffice to maintain the potable water temperature above 150 deg. F.
- the heat to supply the space heaters 142 and to provide heated potable water is provided by the fluid heater 103 .
- the aquastat 132 will indicate no heat is available from the engine circuit 113 and, accordingly, when the aquastat 123 indicates a temperature of less than 150 deg. F., the fluid heater 103 will commence operation and the pump 110 will circulate the glycol within glycol circuit 101 .
- control board 115 is continuously supervising the system 100 and sending coded electric signals to the remote panel 124 where the LCD 151 is located.
- a micro-controller on remote panel 124 will interpret the codes and convert the codes to a user friendly display in a text and numerical format.
- the micro-controller will store the information concerning faults associated with the components of the system and display the loggings of such faults when the system is initially powered up and while the system 100 is on a purge mode when the system 100 is turned off from its operating mode by service switch 120 .
- FIG. 7 illustrates the diagnostic codes which are displayed on main control board display 160 ( FIGS. 3 and 5 ). Each number or symbol represents a particular diagnostic condition and, to allow a display from LCD 151 in a user friendly format, the codes are converted by a micro-controller on the remote control 124 according to the interpretations of FIG. 8 .
- a service number may be given as at 170 ( FIG. 8 ) or advertising may be displayed as shown at 171 .
- Any known display technique may be used besides that of an LCD, such as light emitting diodes, fluorescent displays and the like.
Abstract
A hot water heating system for use in a boat or vehicle which utilises the engine of the vehicle or boat, an AC power source or a fuel powered heater to heat a living area and to heat potable water. Each of the power sources can be utilised independently or in combination depending an the location and operation of the vehicle or boat. A valve is automatically controlled by a thermostat to allow heated fluid to circulate through the living area or to bypass the area. Aquastats are provided to automatically allow potable water to be heated. A display is provided for displaying textual and numerical information in user friendly format relating to the operation of the hot water heating system.
Description
- This invention relates to a heater and, more particularly, to a heater finding particular application in recreational vehicles, boats and the like where heated potable water is required and where heating for the vehicle or boat is required from time to time.
- In our pending U.S. application Ser. No. 08/851,465 filed May 5, 1997, the contents of which are incorporated herein by reference, there is disclosed a fuel powered heater used for heating fluid which fluid is subsequently used for circulation throughout a heating system and which finds particular application in boats and recreational vehicles. While the heated fluid is used to warm the environment in the vehicle or boat wherein the heater is placed, it is often the case that heated potable water is also useful for cooking, drinking, washing and the like within the recreational vehicle or boat. Heretofore, such heated potable water has generally been produced by a heater independent from the heating system used for heating the vehicle or boat and the fuel used in such independent heaters is usually propane.
- It is also often desired that the fuel powered heater used for heating fluid be supplemented or replaced by an AC powered heater if there is a source of AC power available. This might be the case where the boat is docketed and AC power is available or where the recreational vehicle is in an RV park where AC power is available.
- WO 99/61884 (Rixen), published Dec. 2, 1999 and entitled HEATING SYSTEM FOR POTABLE WATER AND RELATIVELY SMALL AREAS, teaches a heating system used to heat a recreational vehicle which system is also used to heat potable water. This system is an advance in an attempt to achieve potable water and space heating with an integrated system. However, Rixen teaches a supplemental heater and a heat exchanger, which supplemental heater heats a second liquid independent from the heating of the first fluid. The use of two powered heaters to heat two fluids, one for each fluid, is costly and creates additional servicing and maintenance problems. Further, Rixen's apparatus is not operated automatically. He requires manual operation of the components of his heating system which manual operation is often very inconvenient.
- According to one aspect of the invention, there is provided a heating system for a boat or vehicle living environment comprising a first source of heat for a first fluid and a second source of heat for said first fluid, at least one space heater within which said first fluid circulates to provide heat to said living environment, a valve to allow said first fluid to bypass said at least one space heater or to allow said first fluid to flow through said at least one space heater, said valve being controlled by a thermostat to allow said first fluid to circulate through said space heater when said thermostat indicates heat is needed in said living environment and to bypass said space heater when said thermostat indicates heat is not required by said living environment.
- According to a further aspect of the invention, there is provided a water heating system for a vehicle or boat comprising a heater fluid loop with heater fluid therein, an engine circuit with engine fluid therein, a space heating loop used for heating a living environment and being operable to allow said heater fluid to circulate therein, a first heat source to heat said engine fluid, a second heat source to heat said heater fluid, a valve to route said heater fluid through said space heating loop or to bypass said space heating loop, said valve being operably connected to a thermostat for measuring the temperature of said living environment to be heated and for instructing said valve to route said heater fluid through said space heating loop or to bypass said space heating loop.
- According to still a further aspect of the invention, there is provided a heating system for heating an environment within a boat or vehicle, said heating system comprising a first heater, a first fluid circulating through said first heater and a potable water heat exchanger, a second fluid circulating through said potable water heat exchanger and being heated by said first fluid in said potable water heat exchanger, said second fluid being potable water.
- According to yet a further aspect of the invention, there is provided a heating system for heating an environment within a boat or vehicle, said heating system comprising a fuel powered heater, a heater fluid line carrying fluid circulating through said fuel powered heater, a pump to circulate heater fluid through said heater fluid line, said heater fluid in said heater fluid line being heated by said fuel powered heater, said heater fluid line extending though at least one space heater in a living environment, said heater fluid in said space heater providing heat to said living environment and a temperature sensor to sense the temperature of said living environment and to control the ingress of said heater fluid into said space heater or to bypass said space heater according to said temperature sensed by said temperature sensor and a potable water heat exchanger having an aquastat and a potable water line carrying potable water associated therewith, said heater fluid line extending through said potable water heat exchanger and exchanging heat with said potable water in said potable water line, said aquastat controlling the operation of said fuel powered heater.
- According to still yet a further aspect of the invention, there is provided apparatus for displaying system status in a text and numerical form for a water heating system used in a boat or vehicle comprising a micro-controller for converting hexadecimal data or serial communications received from a control board into a text and/or numerical user friendly format display, said apparatus displaying the status of said components of said water heating system and for displaying faults associated with said components of said water heating system.
- According to a further aspect of the invention, there is provided a method for displaying in a user friendly format text and numerical information relating to a water heating system used in association with a vehicle or boat comprising visually displaying said text and numerical information in said user friendly format on a display, intermittently interrogating a control board connected to components of said water heating system, determining whether a fault is present which fault is associated with individual ones of said components, converting said fault information to said text and numerical information in said user friendly format and displaying said text and numerical information in said user friendly format on said display.
- According to yet a further aspect of the invention, there is provided a method for displaying user friendly text and numeral information relating to a water heating system on a vehicle or boat comprising positioning a display device for visually displaying said user friendly text and numerical information for viewing by a user in a convenient location for said user, continuously interrogating a control board connected to components of said water heating system, determining whether a fault is present which fault is associated with individual ones of said components, converting said fault information to said user friendly text and numerical information and displaying said user friendly text and numerical information on said display device.
- Specific embodiments of the invention will now be described, by way of example only, with the use of drawings in which:
-
FIG. 1 is a diagrammatic overall view of the fluid and potable water heating system according to a first aspect of the invention in which an optional potable water tank is used for holding heated potable water; -
FIG. 2 is a diagrammatic overall view of the heating system similar to that ofFIG. 1 but illustrating electrical apparatus for heating fluid wherein no potable water storage tank is illustrated; -
FIG. 3 illustrates a wiring diagram for the systems illustrated inFIGS. 1 and 2 ; -
FIG. 4 is a schematic illustrating the diagnostics for the systems illustrated inFIGS. 1 and 2 ; -
FIG. 5 , appearing on seven (7) pages with nine (9) accompanying sheets, is an electronic diagram showing in greater detail the control board ofFIG. 3 accompanied by sheets 1-9 which are enlarged portions ofFIG. 5 and which collectively are identical ofFIG. 5 ; -
FIG. 6 illustrates the circuit for the flame sensor ofFIG. 3 ; -
FIG. 7 sets out the diagnostic codes for the heating system displayed by the main control board according to the invention; and -
FIG. 8 illustrates the diagnostic code interpretations as displayed on the LCD associated with the remote control panel. - Referring now to the drawings, reference is made to
FIGS. 1 and 2 wherein the overall heating system according to the invention is illustrated generally at 100. Theheating system 100 conveniently utilises glycol fluid circulated through aglycol circuit 101 and potable water circulated through apotable water circuit 102, although other liquids could conveniently also be used within theglycol circuit 101. A fuel poweredfluid heater 103 of the air aspirated type as disclosed in our U.S. Pat. No. 5,391,075, the contents of which are herein disclosed by reference, is conveniently used to heat the glycol in theglycol circuit 101. A heater sold under the trademark HURRICANE® and marketed by International Thermal Research Ltd. of Richmond, British Columbia, Canada has proven useful for this application. Aheat exchanger 104 is conveniently used to exchange heat from the glycol fluid in theglycol circuit 101 to the potable water in thepotable water circuit 102. - A potable water heater and
storage tank 106 is provided to heat the potable water although it is optionally provided in the configuration ofFIG. 1 . Apump 110 moves the glycol through theglycol circuit 101 andisolation valves 107 are provided to terminate or allow flow of the glycol through theglycol circuit 101. - A single thermostat 131 (
FIG. 1 ), in the event a single heating zone is heated or a plurality of thermostats 130 (FIG. 2 ) in the event a plurality of heating zones are heated, monitor the temperature of the living space or environment of the vehicle or boat. Aquastats 123, 132, adjustable as desired, are provided to monitor the temperatures within thepotable water heater 106 and theengine fluid circuit 113, respectively, and to send appropriate temperature information to themain control board 115. An engine pump 153 (FIG. 2 ) circulates water in theengine circuit 113 as will be described. Cycling aquastats 152 (FIG. 2 ), an additional one being used as a failsafe backup aquastat, used with the AC poweredwire coils 122, are positioned within the annulus of thefluid heater 103 and are operable to maintain the potable water at approximately 150 deg. F., theaquastats 152 having a range of about 10 deg. F. A pair ofhigh temperature aquastats 154 shut down the power supplied to the AC poweredcoils 122 if the temperature of the fluid exceeds 200 deg. F. for safety purposes. - The
glycol circuit 101 includes awinter loop circuit 105 to heat the space or zones within which thevarious space heaters 142 are located and asummer loop circuit 108 which bypasses thewinter loop circuit 105 according to the position of three waydirectional valve 109 whichvalve 109 is manually or conveniently automatically operated by, for example, adjustable thermostat 131 or thermostats 130 (FIG. 2 ) which measure the environment or living space temperature. If the temperature of the space is below that desired by the user, threeway valve 109 will allow the heated glycol to circulate through thewinter loop 105. If the temperature is above the desired user temperature as measured by thermostat 131, threeway valve 109 will bypass thewinter loop 105 and pass the glycol directly tosummer loop 108 thereby avoiding a temperature increase in the living environment of the vehicle or boat. Further, by bypassing thewinter loop 105 when the heat for space heating is not required, the heat provided to the potable water throughheat exchanger 104 will be more efficiently used and the temperature increase of the potable water will be more quickly achieved such as would be desirable, for example, if hot water was suddenly needed. - An expansion tank 111 and an
overflow tank 114 are associated with theglycol circuit 101. Aheat exchanger 121 is provided between theglycol circuit 101 and theengine fluid circuit 113 to allow heat to be exchanged between the twocircuits fluid heater 103 is not required. Amixing valve 133 is provided in thepotable water circuit 102 to allow for the desired water temperature incircuit 125 due to mixing the cold water provided by theinlet circuit 126 prior to heating the potable water inheat exchanger 104 orpotable water heater 106 and the heated water emanating from theheat exchanger 104 orpotable water heater 106. - A main control panel 115 (seen in more detail in
FIG. 5 ) is used to control the various components of the overallwater heating system 100 and is further used to interrogate the components so as to display any problem or fault associated with the various components. Aremote control 124 with an associated.LCD display 151 may be operably associated with themain control panel 115 and mounted for operation at a location more user convenient than that occupied by themain control panel 124. A wiring harness 116 (see alsoFIG. 2 ) runs from themain control panel 115 to thespace heaters 142 inwinter loop 105 and associatedspace heater thermostats 130, it being appreciated that the individual ones of thespace heaters 142 may be located in different living areas and each may conveniently have an individual bypass loop as well as theentire circuit 105 being bypassed bydirectional valve 109 which will allow the heater water in thewinter loop 105 to enter or to bypass therespective space heaters 142 according to the user desired temperatures as evidenced bythermostats 130. - The usual components are associated with the fuel powered
fluid heater 103.Fuel lines 140 are used to provide fuel to and allow fuel to leaveheater 103. Anair intake duct 141 supplies combustion air to thefluid heater 103 and anexhaust duct 145 allows for exhaust to the ambient surroundings through amuffler 143. - The
LCD display 151 provided on theremote control 124 displays text and number relating to the operating conditions and heater system diagnostics as will be described. The display format is user friendly in a text and numerical form and may include servicing information and advertising. - Referring now to
FIG. 2 , in which like numerals cover the same apparatuses as shown inFIG. 1 but which embodiment does not utilise a separatepotable water heater 106 as illustrated inFIG. 1 , a first technique for heating glycol fluid passing through thefluid heater 103 where it is not desired to utilise the fluid fuel poweredheater 103 such as when an AC power source is available, is to use a set ofwire coils 122 whichcoils 122 are easily attached to and removed from the circumference of thefluid heater 103 and which are heated by passing AC power through thecoils 122 when desired. This is one of several techniques which may be used to heat the water in thefluid heater 103 when AC power is available, another being to simply provide an immersible rod (not shown) into theglycol circuit 101 which rod heats the fluid upon passing power through the rod. These techniques and others using AC power as an independent heat source to heat the fluid in thefluid circuit 101 are commonly used and form no part of the present invention. - A diagnostic system used for the system diagnostics is generally illustrated at 116 in
FIG. 4 . The result of the diagnostics is displayed byLCD display 151 whichdiagnostic display 151 will be described in greater detail. The diagnostic codes for theheater 103 are illustrated inFIG. 7 . These diagnostic codes are displayed on themain control board 115 by numeric display 160 (FIGS. 1 and 5 ). Thenumeric display 160 is converted to the textual and numerical display ofFIG. 8 onLCD 151 by a micro-controller associated with theremote control 124. The wiring diagram used for the systems ofFIGS. 1 and 2 is shown generally at 112 inFIG. 3 . Aservice switch 120 provides power to themain control board 115. A remote switch 117 (FIG. 4 ) allows the user to remotely control the operation of thefluid heater 103. - The flame sensor circuit is generally illustrated at 127 in
FIG. 6 and is used for sensing the presence or absence of a flame in thefluid heater 103. Theflame sensor circuit 162 is illustrated and described in detail in our pending U.S. patent application Ser. No. 09/579,444 filed May 26, 2000, the contents of which are herein disclosed by reference. - In operation, it will be assumed that the vehicle or boat is at rest with the engine not running and that AC shore or outside power is available to the vehicle or boat from an AC power source generally illustrated at 134 (
FIG. 2 ). TheAC power source 134 is intended to heat and to maintain the potable water within the temperature range of 150 deg. F. and 205 deg. F. as defined by cycling aquastats 152 and high temperature or limit aquastats 154 (FIG. 2 ). In the event the temperature of the fluid measured by theaquastats 152 falls below 150 deg. F., the wire coils 122 will commence operation and draw AC power from theAC power source 134. - The AC heater coils 122 (
FIG. 2 ) form an independent heat source for the fluid in theglycol circuit 101. Thecycling aquastats 152 are normally closed when the temperature is below 150 deg. F. and allow the flow of AC power. Theaquastats 152 open when the temperature of the fluid exceeds 150 deg. F. thereby shutting down the power. There is an approximate 10 deg. Temperature range of thecycling aquastats 152. High temperature orsafety limit aquastats 154 terminate. AC power flow to thecoils 122. - If the
aquastats 152 are closed indicating that heat is required in the glycol circuit and power is flowing in the AC circuit,aquastats aquastats fluid pump 110 will be activated and the glycol will circulate through thefluid heater 103 and potablewater heat exchanger 104 without the operation offluid heater 103 being necessary. Ifaquastat 161 opens thereby indicating the temperature has dropped below 100 deg. F., it is apparent the heat created by thecoils 122 is insufficient. Accordingly, thepump 110 will terminate and thefuel heater 103 will commence operation assuming main andremote switches aquastat 161, thepump 110 will again commence operation. - While the fuel powered
heater 103 is operating,cycling aquastats 162 will attempt to maintain a fluid temperature of 180 deg. F.High temperature aquastats 163 will terminate operation of theheater 103 when the temperature exceeds 180 deg. F. for safety reasons. Whenaquastats 152 exceed 150 deg. F., the AC powered coils 122 will terminate operation but fuel poweredheater 103 will continue operation untilaquastat 162 reaches 180 deg. F. at which point the fuel poweredheater 103 will terminate operation with thepump 110 continuing to operate untilaquastat 161 drops below 100 deg. F. or until there is no demand for heat as represented byaquastat 123 in potablewater heat exchanger 104 or as represented bythermostats 130. If desired, the operation of the fuel poweredheater 103 may be terminated by movingremote switch 117 to the OFF position. - The heat provided from the engine forms a third independent source of heat for the
heating system 100 in the event the engine is operating. In this case,aquastat 132 will be sensing the temperature inheat exchanger 121. If heat is required as indicated bythermostats 130 or byaquastat 123 on potablewater heat exchanger 104, then pump 110 will commence operation whenaquastats heater 104, and the glycol inglycol circuit 101 will be heated in theengine heat exchanger 121 and provide the requested heat to any or all of thespace heaters 142 and potablewater heat exchanger 104. - When the
thermostats 130 indicate no heat is required in thewinter loop 105, three waydirectional valve 109 will terminate flow through thewinter loop 105 and the heated glycol will flow only through the potablewater heat exchanger 104. When aquastat 123 indicates the potable water is at 150 deg. F. or above, thepump 110 will terminate operation. - It will next be assumed that it is desired to heat the space within which the
various space heaters 142 are situated. The user will raise the temperature of thermostat 131 (FIG. 1 ) or one of thermostats 130 (FIG. 2 ) to the desired temperature of the space to be heated. This will initiate operation of the three-waydirectional valve 109 and require heated glycol in theglycol circuit 101 to be circulated through thewinter loop circuit 105 as is shown inFIGS. 1 and 2 . The circulation of glycol through thewinter loop 105 will continue until the temperature sensed bythermostat 151 or one of thethermostats 130 reaches the desired user value at which point the three-waydirectional valve 109 will terminate flow through thewinter loop 105 and initiate glycol flow only through thesummer loop 108 thereby avoiding any additional heat emanating from theheaters 142 in thewinter loop 105 and providing heat solely to heat the potable water throughheat exchanger 104 which is a more efficient use of the heated glycol in theglycol circuit 101. - It will now be assumed that the vehicle or boat is underway and that the engine is operating in its normal operating mode. No shore based AC power is available and therefore the wire coils 122 will not be operating.
Aquastat 132, which is associated withheat exchanger 121, will be monitoring the temperature of the fluid in theengine circuit 113. In theevent aquastat 132 senses a temperature of greater than 120 deg. F., it will signal thecontrol board 115 that heat is available from theengine circuit 113. If theaquastat 123 associated withheat exchanger 104 indicates water temperature below 150 deg. P., pump 110 will commence operation and circulate the glycol within theglycol circuit 101 thereby picking up heat from the engine fluid by way ofheat exchanger 121 until the potable water temperature returns to a temperature of greater than 150 deg. F. at whichpoint pump 110 will cease operation. Ordinarily, engine operation will suffice to maintain the potable water temperature above 150 deg. F. - In the event there is no engine power and no source of AC power, the heat to supply the
space heaters 142 and to provide heated potable water is provided by thefluid heater 103. Theaquastat 132 will indicate no heat is available from theengine circuit 113 and, accordingly, when theaquastat 123 indicates a temperature of less than 150 deg. F., thefluid heater 103 will commence operation and thepump 110 will circulate the glycol withinglycol circuit 101. - If the
service switch 120 is ON,control board 115 is continuously supervising thesystem 100 and sending coded electric signals to theremote panel 124 where theLCD 151 is located. A micro-controller onremote panel 124 will interpret the codes and convert the codes to a user friendly display in a text and numerical format. In addition, the micro-controller will store the information concerning faults associated with the components of the system and display the loggings of such faults when the system is initially powered up and while thesystem 100 is on a purge mode when thesystem 100 is turned off from its operating mode byservice switch 120. -
FIG. 7 illustrates the diagnostic codes which are displayed on main control board display 160 (FIGS. 3 and 5 ). Each number or symbol represents a particular diagnostic condition and, to allow a display fromLCD 151 in a user friendly format, the codes are converted by a micro-controller on theremote control 124 according to the interpretations ofFIG. 8 . In addition to the user friendly text and number display, a service number may be given as at 170 (FIG. 8 ) or advertising may be displayed as shown at 171. - Any known display technique may be used besides that of an LCD, such as light emitting diodes, fluorescent displays and the like.
- Various other modifications and changes may readily occur to those skilled in the art to which the invention relates and the specific embodiments described should be taken as illustrative of the invention only and not as limiting its scope as defined in accordance with the accompanying claims.
Claims (15)
1-21. (canceled)
22. Apparatus for displaying system status in a text and numerical form for a water heating system used in a boat or vehicle comprising a micro-controller for converting hexadecimal data or serial communications received from a control board into a text and/or numerical user friendly format display, said apparatus displaying the status of components of said water heating system and for displaying faults associated with said components of said water heating system.
23. Apparatus as in claim 22 and further displaying advertising and/or servicing information.
24. Apparatus as in claim 23 and further displaying a list of said faults and the number of times each of said faults has occurred during operation of said water heating system.
25. Method for displaying in a user friendly format text and numerical information relating to a water heating system used in association with a vehicle or boat comprising visually displaying said text and numerical information in said user friendly format on a display, intermittently interrogating a control board connected to components of said water heating system, determining whether a fault is present which fault is associated with individual ones of said components, converting said fault information to said text and numerical information in said user friendly format and displaying said text and numerical information in said user friendly format on said display.
26. Method for displaying user friendly text and numeral information relating to a water heating system on a vehicle or boat comprising positioning a display device for visually displaying said user friendly text and numerical information for viewing by a user in a convenient location for said user, continuously interrogating a control board connected to components of said water heating system, determining whether a fault is present which fault is associated with individual ones of said components, converting said fault information to said user friendly text and numerical information and displaying said user friendly text and numerical information on said display device.
27. Method as in claim 26 wherein said display is an LCD display.
28. Method as in claim 26 wherein said display is by way of a vacuum tube display and/or a touch screen display.
29. Method as in claim 26 and further displaying said faults upon commencement of the operation of said water heater system.
30. Method as in claim 29 and further displaying said faults upon shutdown of said water heater system.
31. Method as in claim 29 and further displaying the number of said faults associated with each of said components.
32. Method as in claim 26 and further including emitting an audio signal when a fault is present in said water heating system.
33. Method as in claim 26 wherein a unique number is associated with each of said components, said numbers being displayed upon power up or shutdown of said water heating system.
34. Method as in claim 26 and further including displaying textual and numerical information relating to fault free operation of said water heating system and for displaying servicing and advertising information.
35. Apparatus for displaying system status in a text and numerical form for a water heating system used in a boat or vehicle comprising a display device for for displaying system status in a text and numerical form for said water heating system comprising a micro-controller for converting hexadecimal data or serial communications received from a control board into a text and/or numerical user friendly format display, said apparatus displaying the status of components of said water heating system and for displaying faults associated with said components of said water heating system.
Priority Applications (1)
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US11/005,882 US20050193412A1 (en) | 2001-07-16 | 2004-12-07 | Potable water heater and method of using same |
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US11/005,882 Abandoned US20050193412A1 (en) | 2001-07-16 | 2004-12-07 | Potable water heater and method of using same |
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US10/326,894 Abandoned US20040031858A1 (en) | 2001-07-16 | 2002-12-20 | Potable water heater and method of using same |
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Also Published As
Publication number | Publication date |
---|---|
WO2003008876A2 (en) | 2003-01-30 |
US20030010835A1 (en) | 2003-01-16 |
CA2734735A1 (en) | 2003-01-30 |
US20040031858A1 (en) | 2004-02-19 |
US20030226904A1 (en) | 2003-12-11 |
CA2453298C (en) | 2011-05-17 |
CA2453298A1 (en) | 2003-01-30 |
AU2002317646A1 (en) | 2003-03-03 |
WO2003008876A3 (en) | 2003-05-01 |
EP1407200A2 (en) | 2004-04-14 |
CA2734735C (en) | 2018-10-09 |
US7036746B2 (en) | 2006-05-02 |
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