DE102008044280A1 - House area heater - Google Patents

Abstract

The invention relates to a home-range instantaneous water heater with a line (1) for passing a flowable medium (M) and with a heating device (5, 6, 5, 6 *) for heating the medium (M), wherein the heating device (5 , 6, 5, 6 *) as an inductive heating device for generating an alternating magnetic field, a coil (5) and at least one heating element (6, 6 *) with a ferromagnetic material which is heated by the alternating magnetic field, and wherein the conduit (1) having at least one radiator (6, 6 *). Such a home-range instantaneous water heater can be used in particular in a household appliance such as a hot water instantaneous water heater, a washing machine, a tumble dryer, a washer-dryer or a dishwasher.

Description

The The invention relates to a home-range instantaneous water heater for passing a flowable medium and with a heater for heating the medium and a household appliance with such a house area water heater.

to Heating of air, lye or water is in the household sector generally known to provide flow heaters, which a Line for passing a flowable Medium and a heater for heating the medium. For example, the heater may consist of a burner, which with a gas-assisted flame the pipe and above heated the fluid medium. Also known is the use of a heater in the form a current-carrying resistance wire which heats up and the wire wrapped by the resistance wire and above the medium contained therein heated.

in the Household area various devices are known which have a home-range instantaneous water heater based on Such a technique, the fluid medium heated or heated.

Generally known are JP 2004-135998 . JP 2005-177331 or US 5,724,750 Washing machines, tumble dryers or combined laundry dryers, in which a ferromagnetic laundry drum is heated by means of an alternating magnetic field. For this purpose, at least one or more coils for generating the alternating magnetic field are arranged outside the laundry drum. Due to the laundry load of the laundry drum, the laundry drum at a high rotational speed during a spin cycle in vibrations, which run the laundry drum out of control. Due to this, it is disadvantageously required that the induction coils for generating the alternating magnetic field are arranged at a large distance from the drum. In order to heat the drum sufficiently, therefore, correspondingly large electrical currents must be applied to the coils.

Also well known is the use of induction heaters in herds for heating food.

in the Domestic engineering is also used for physical "water descaling" known, by alternating magnetic fields, a conversion of im Water contained "lime" in a lime form cause, which does not settle in lines.

Generally Also known from plant construction are induction furnaces for heating metals.

It The object of the present invention is a home-range instantaneous water heater to provide which is particularly reliable, safe and is energy-saving operable.

These Task is performed by means of a house area water heater and a Household appliance according to the respective independent Claim solved. Preferred embodiments are in particular the dependent claims removable.

Of the House area water heater has a pipe with at least a flow channel for passing a flowable Medium (liquid and / or gas) on, as well as a heater for heating the medium, wherein the heating device as for generating an alternating magnetic field, a coil and further at least one heatable by the alternating magnetic field Radiator has.

A such arrangement thus exploits that a primary energy, which is provided by the coil as a primary winding is, by magnetic induction in the secondary side attached radiator is transferred. Under Exploitation of the transformer or the eddy current principle is generated in the radiators according to heat and transferred from these to the adjacent medium. By the inductive power transmission from the coil to the Radiator, a power loss can be kept low, whereby operate such a water heater energy-saving leaves.

The primary source of energy (coil) and the radiator (s) are electrically isolated from each other (galvanically isolated) so that on contacts and cables for the transmission of Electricity to be dispensed into the area to be heated can. This will be a cheaper and less susceptible to corrosion Construction achieved. It is particularly advantageous that electrical components far from any fluid-carrying components are arranged and thereby a contact protection of live Parts is guaranteed, which increases the reliability. Another advantage is the possible conversion of the im Water contained "lime" in a lime form, which no longer on device surfaces, such. B. Radiators, attaches what the reliability further increased.

Such a home-range instantaneous water heater is particularly useful in a household appliance such as a hot water instantaneous water heater, a washing machine, a tumble dryer, a Washer dryer or a dishwasher. In principle, such a domestic hot water heater but also household installations such as heating or sanitary concern.

to particularly low-loss energy transfer to or The radiator becomes the coil by means of a resonant converter operated or represents a part of it.

Of the at least one radiator can in the at least one Flow channel be introduced as so constructive simple way a large area of contact can reach with the flow medium. To the at least one radiator can in particular be a plurality of individual radiators, which advantageously leave a sufficient space for the flow medium. Accordingly, the ratio of the surface, which is in contact with the medium to be heated, and the internal volume of the radiator, adjustable to a high heat transfer rate and thus a to get low response time. Particular preference is given to individual heaters with spherical basic shape, since these have a volume of space and between the balls a passage volume for the medium allow in a particularly advantageous embodiment. Furthermore balls have a relatively smooth and vortex-inhibiting surface on.

to Warming based on the eddy current principle, the at least a radiator an electrically conductive single radiator exhibit. For particularly high energy absorption of the single heater comprise a ferromagnetic material, preferably iron-based (Ferrite, steel, etc.).

to Realization of a transformer coupling that is an inductive Coupling between a separable primary section and secondary section a transformer, the at least one radiator at least one secondary winding ("secondary coil") have, in particular a short-circuited secondary winding. By that of the coil ("primary coil") generated alternating magnetic field is in the secondary coil, whose winding may have one or more turns, a current generated, which is converted into heat due to the short circuit becomes. In particular, in this case, a resonant converter is advantageously used. For particularly effective heat generation, the secondary coil a resistance heating wire as a winding wire. Alternatively or In addition, the coil with heating resistors be provided as a load. The radiator can have several individual radiators each with one secondary coil or more secondary coils exhibit.

to Effective power consumption can be the at least one radiator have a coil core of a ferrite-containing material, for. B. in the form of a shell core.

The Coil for generating the alternating magnetic field can be for easy Producing and obtaining a high reliability outside be arranged a wall of the conduit. So that the flow channel not or at least not essential to warm the Radiator is shielded by the wall is the Wall advantageously at least partially or in regions formed free of an electrically conductive material, for. B. made of plastic. This allows the alternating magnetic field essentially undisturbed in the flow area with the at least one radiator located therein penetration.

According to one another, but also combinable embodiment the at least one radiator at least partially as formed a part of the wall. In this sense can Of course, a plurality of spaced apart wall sections a wall of the conduit designed as such radiator be, so electrically conductive, especially metallic, especially ferromagnetic material. Advantageous in such arrangements is an outside thermal shield, so that the Heat generated in the wall regions of the pipe preferably only in the direction of the medium flowed through by the conduit is delivered. The wall can also be warming, in the at least one flow channel projecting heat transfer elements such as Longitudinal ribs, etc. have.

The Medium may in particular comprise air, water or a lye, as it is as a working medium or as a heat transfer medium in Household is used.

Especially, if the at least one radiator in contact with moisture can reach, especially within the flow area of the medium, it advantageously has a corrosion protection on. Corrosion protection is particularly expedient since ferromagnetic materials tend to oxidize or "rust". In particular, when flowed through by water or a brine as the medium Lines is therefore a coating on the outside the radiator with a corrosion protection advantageous. alternative or additionally, at least the flow medium exposed areas of the radiator of a stainless Material exist.

In a particularly preferred such domestic hot water heater, the pipe is tubular and outside with an In a heating coil with the at least one heating element is formed within the coil-wrapped region in the wall and / or in the at least one flow channel.

In The following figures illustrate the invention with reference to exemplary embodiments described in more detail schematically. Here are for clarity identical or equivalent elements with the same reference numerals Mistake.

1 shows a first embodiment of a preferred domestic range water heater in partial sectional view and

2 a second embodiment of a domestic range water heater in a sectional view.

The basis 1 exemplified home range water heater 16 a clothes dryer (washer-dryer or dryer) H has a tubular conduit 1 on. The administration 1 has a wall 2 on which a flow channel 3 encloses. The outer surface of the wall 2 is with a coil 5 which, when an alternating current is applied in the volume enclosed by it, generates an alternating magnetic field and thus serves as an induction coil. At its ends is on the wall 2 one flange each 4 formed, which as Abrutschschutz for a coil 5 serves. The wall 2 is made of a non-conductive material, eg. As plastic, trained to that of the coil 5 generated electromagnetic alternating field to provide the least possible shielding.

In the flow channel 3 the line 1 is arranged as a radiator, a plurality of spherical-shaped individual radiators 6 which have been produced as separate bodies. The single heaters 6 consist of a material which arises when applying the alternating current by means of the coil 5 heated due to eddy currents induced therein. While the material may generally be an electrically conductive material, particularly a metal, to achieve high efficiency, a ferromagnetic or high ferromagnetic material is used, particularly a corrosion protected ferrous material.

A control device 8th as drive and control electronics serves one of a power supply connection 9 to receive the power supplied and via coil connection cables 10 an alternating current to the coil 5 To put on so that the coil 5 the alternating magnetic field in the flow channel 3 in the field of radiators 6 generated and the radiators 6 heated or heated. When circulating the heated radiator 6 the medium M also heats up. At the exit area of the pipe 1 is in or on the flow channel 3 a temperature sensor 7 arranged, which serves for detecting the output temperature of a medium M, which the interior 3 in the direction of the temperature sensor 7 flows through it while the radiator 6 lapped. Preferably, the control device 8th designed, a temperature by means of a temperature sensor 7 detected and via a signal line 11 to the controller 8th regulated temperature signal to regulate.

Preferably, the individual radiators 6 with a corrosion protection 12 provided, which may be formed for example as a coating.

To connect the cable 1 to an external line system, the line 1 preferably at the two front ends in each case a pipe socket 13 on, through which the medium M in the flow channel 3 led in or on the opposite side of the flow channel 3 is dissipated.

The water heater 17 out 2 shows up on the radiator 6 * the same components as the water heater 16 out 1 , why opposite 1 especially the radiator 6 * will be described in more detail.

Instead of a large number of spherical radiators, in this embodiment, there is now longitudinally through the flow channel 3 extending and from the wall 2 for flushing with the medium sufficiently spaced radiator 6 * in whose cavity 18 strung together several single radiator 19 are located. The single heaters 19 each have a shell core 14 made of ferrite material, in which a short-circuited secondary winding 15 is housed. During an alternating magnetic field at the secondary windings 15 is applied, they are heated and thereby heat the ferrite core 14 , The ferrite cores 14 in turn, heat the radiator 6 * , and this the flow medium M.

Of course the present invention is not limited to the embodiments shown.

Thus, the various embodiments are designed combinable. For example, a variety of individual radiators can be installed 1 each be wrapped with secondary windings. Also, instead of a single elongated ferrite-containing body 14 an arrangement of a plurality of such bodies in succession or side by side in the interior 3 disposed be.

The individual radiator shown as an example 1 must not be spherical, but may also be shaped differently, z. B. disc-shaped or annular.

According to an alternative, not shown embodiment, which in principle can also be combined with the two described embodiments ausgestaltbar, also the wall or at least a portion of the wall can be configured as the radiator. This is indicated by the wall 2 then corresponding electrically conductive, in particular ferromagnetic, sections or is formed as a whole ferromagnetic, so that of the coil 5 generated alternating magnetic field heats the wall of the pipe. In such an embodiment, a heat-reflecting and / or heat-insulating layer is preferably arranged on the outside of the wall, in order to allow as complete a transfer of the heat as possible in the direction of the interior and of the medium.

While an arrangement of a cylindrical tube is described above as the wall with a coil that winds this arrangement, in principle also differently dimensioned configurations are possible. Instead of a circular tube, it is also possible to use an angular, elliptical or otherwise shaped conduit system. Also, the coil does not necessarily have to be around the line 1 can be wrapped around, but can in principle be configured from a plurality of laterally planar on the wall or adjacent to the wall arranged plurality of individual coil conductors. The coil may, with a corresponding electrical insulation, also be disposed within the wall or be integrated into the wall, for. B. be poured.

Also the coils and coil cores can be configured differently, z. B. with a material other than a ferrites for a coil core.

alternative To a corrosion coating can already corrosion the base material be, z. As stainless steel, and it can be applied to a coating be waived.

1

heater

2

wall

3

flow channel

4

flange

5

Kitchen sink

6 6 *

radiator

7

temperature sensor

8th

control device

9

Power connector

10

Coil cord

11

signal line

12

corrosion protection

13

pipe socket

14

ferrite tiger body

15

secondary winding

16

Heater

17

Heater

18

cavity

19

single radiator

H

Laundry drying device

M

flowable medium

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - JP 2004-135998 [0004]
• - JP 2005-177331 [0004]
• US 5724750 [0004]

Claims (10)

House area water heater ( 16 ; 17 ), comprising - a line ( 1 ) with at least one flow channel ( 3 ) for passing a fluid medium (M) and - a heating device ( 5 . 6 ; 5 . 6 * ) for heating the medium (M) in the conduit ( 1 ), characterized in that - the heating device ( 5 . 6 ; 5 . 6 * ) at least one coil ( 5 ) for generating an alternating magnetic field and at least one heatable by the alternating magnetic field radiator ( 6 ; 6 * ) having. House area water heater ( 16 ; 17 ) according to claim 1, wherein the at least one radiator ( 6 ; 6 * ) in at least one flow channel ( 3 ) is introduced. House area water heater ( 16 ) according to claim 1 or 2, wherein the at least one radiator ( 6 ; 6 * ) an electrically conductive, in particular metallic, individual heating element ( 6 ) having. House area water heater ( 17 ) according to one of the preceding claims, in which the at least one radiator ( 6 * ) at least one secondary winding, in particular short-circuited secondary winding ( 15 ), having. House area water heater ( 17 ) according to claim 4, wherein the at least one radiator ( 6 * ) at least one spool core ( 14 ) comprises a ferrite-containing material. House area water heater ( 16 ; 17 ) according to one of the preceding claims, in which the coil ( 5 ) for generating the alternating magnetic field outside a wall ( 2 ) of the line ( 1 ) is arranged and the wall ( 2 ) is at least partially formed free of an electrically conductive material. Domestic instantaneous water heater according to one of the preceding claims, in which the at least one radiator is at least partially formed as part of the wall ( 2 ) of the line ( 1 ) is trained. House area water heater ( 16 ; 17 ) according to any one of the preceding claims, wherein the medium (M) is air, water or a liquor. House area water heater ( 16 ; 17 ) according to one of the preceding claims, in which - the line ( 1 ) tubular and externally with the coil ( 5 ) is wound to produce the alternating magnetic field and - the radiator ( 6 ; 6 * ) within of the coil ( 5 ) wrapped area is arranged. Household appliance (H), in particular hot water instantaneous water heater, washing machine, tumble dryer, washer-dryer or dishwasher, characterized in that the domestic appliance has at least one such domestic hot water heater ( 16 ; 17 ) having.