CN101971696B

CN101971696B - Heater, particularly for containment boxes for mechanisms for manual operation of actuation shafts of electrical disconnectors and like

Info

Publication number: CN101971696B
Application number: CN201080001096.3A
Authority: CN
Inventors: D·贝加莫
Original assignee: Areva T&D Italy SpA
Current assignee: Grid Solutions SpA
Priority date: 2009-02-26
Filing date: 2010-02-24
Publication date: 2013-12-25
Anticipated expiration: 2030-02-24
Also published as: CN101971696A; WO2010097403A1; ITPD20090030A1

Abstract

A heater (10), particularly for containment boxes for mechanisms for the manual operation of actuation shafts of electrical disconnectors and the like, comprising - a thermistor (11) with a positive temperature coefficient, - a heat sink (12) provided with at least two alternative regions of thermal contact (13) with the thermistor (11), which have surfaces (14a, 14b), designed for thermal contact with the thermistor (11), of different extension, - a supporting wall (15) for the heat sink (12) and the thermistor (11), which has a seat (16) for thermal contact with the thermistor (11).

Description

Heater, especially for the heater held for the accommodation box of the mechanical device of the actuator shaft of manual control electric circuit breaker etc.

Technical field

The present invention relates to a kind of heater, relate in particular to for the heater held for the accommodation box of the mechanical device of the actuator shaft of manual control electric circuit breaker etc.

Background technology

Known at present, box holds the mechanical device for the actuator shaft of manual control circuit breaker.

These boxes are equipped with heater usually, and this kind of heater is suitable for preventing producing in box condensation, and the condensation meeting affects the electric device of its encapsulation.

Known heater provides by heating resistor usually at present, and the size of heating resistor depends on for avoiding producing condensation need be dissipated in the heat energy in box.

Be known that the position and the weather that are set up according to the box to be heated that holds resistor install different resistors.

It is also known that at present, heater has the resistor with positive temperature coefficient, and this resistor also is called PTC resistor (" positive temperature coefficient ") and is contained in the radiator that is provided with fin.

The close contact of PTC resistor and radiator is for effectively conducting the heat produced when supply of electrical energy.

Usually the heater of preset this type is with heat dissipation, and under the given condition of the ambient temperature in box, the heat of dissipation depends on the performance of PTC resistor substantially.

Therefore, the heater with PTC resistor is installed at present, the position and the weather that according to the box to be heated that holds resistor, are set up limit this kind of resistor in advance.

Summary of the invention

Target of the present invention is to provide adjustable heater, and this heater can be adjusted in use by the heat dissipated when it is installed.

In this target, the purpose of this invention is to provide a kind of heater of energy Application standard parts, this heater can be revised it and construct to adjust the heat by producing.

Another object of the present invention is to provide a kind of easy to use and can be with the heater of low cost fabrication relatively.

This target and these and other purpose will become hereinafter more clear and realize by a kind of heater, this heater is especially for the accommodation box held for the mechanical device of the actuator shaft of manual control electric circuit breaker etc., it is characterized in that, this heater comprises:

-thermistor, this thermistor has positive temperature coefficient.

-radiator, but this radiator has at least two favored area with the thermistor thermo-contact, and these zones have and are designed to from the thermistor thermo-contact and have the surface of different expanded areas.

-abutment wall, this abutment wall is used for supporting radiator and thermistor, and has for the bearing with the thermistor thermo-contact.

The accompanying drawing explanation

From heater of the present invention one preferably but the embodiment of non-exclusionism below detailed description, carry out example by the non-limitative example in accompanying drawing, further feature and advantage of the present invention will become more apparent, in the accompanying drawings:

Fig. 1 is the part cutaway top view according to heater of the present invention;

Fig. 2 is according to stereogram of the present invention, heater in using structure;

Fig. 3 is the exploded perspective view according to the parts of heater of the present invention.

Embodiment

It should be noted that and be found to be in applying for a patent process that known any content all is understood to not require protection and be the theme of abandoning protection.

With reference to accompanying drawing, Reference numeral 10 always represents that especially this heater comprises for the heater of the accommodation box of the mechanical device of the actuator shaft that holds manual control electric circuit breaker etc.:

-thermistor 11, this resistor has positive temperature coefficient,

-radiator 12, but this radiator is preferably made of aluminum and have for two favored area 13 with thermistor 11 thermo-contacts, and these zones have and are designed to from thermistor 11 thermo-contacts and have corresponding surface 14a and the 14b of different expanded areas,

-abutment wall 15, this abutment wall is used for supporting radiator 12 and thermistor 11, and has for the bearing 16 with thermistor 11 thermo-contacts.

Radiator 12 has radiating fin 17 aptly, and these radiating fins are outstanding from the first surface 18 of radiator, and first surface is contrary with the second surface 19 of radiator, for the zone 13 with thermistor 11 thermo-contacts, is arranged on second surface.

In alternative of the present invention, radiator 12 can have plural thermo-contact zone, and these thermo-contact zones have for the surface with the thermistor thermo-contact, and these surfaces have different expanded areas.

The pre-localized area 13 in thermo-contact zone 13 preferably has groove 20, and this groove is for reducing the surface in order to contact.

For this reason,

contact surface

14a and 14b, there is the little expanded area than the second contact surface 14b corresponding to the first surface 14a of the pre-localized area 13a in thermo-contact zone 13, this is due to respect to described the second contact surface, and first surface lacks the part that groove 20 affects.

In use, thermistor 11 is included between radiator 12 and abutment wall 15, radiator 12 is fixed in abutment wall, and at least one of thermistor and thermo-contact bearing 16 select part thermo-contact and with the selection zone 13b thermo-contact in thermo-contact zone 13.

Advantageously, thermo-contact zone 16 has the surface of 21，Gai hole, hole for minimizing and thermistor 11 thermo-contacts.

Suitable, abutment wall 15 be arranged in box 22 so that heater 10 according to the present invention towards wherein, thereby heating box inside in use, this box holds the armstrong's patent device 23 of the actuator shaft 24 for handling electric circuit breaker etc.

As follows according to the operation of heater 10 of the present invention.

When mounted, thermistor 11 contacts with the selection zone 13b juxtaposition in the thermo-contact zone 13 of radiator 12, thereby thermistor is included between described radiator and abutment wall 15, and described radiator is fixed in abutment wall.

The predetermined amount of heat that inside based on effective heating box 22 is required, the juxtaposition that limits thermo-contact zone 13 presses the selection area 13b of thermistor 11.

In fact, be known that heat that thermistor 11 will be inversely proportional to its temperature is transmitted to the radiator 12 with its thermo-contact.

Therefore, if radiator 12 makes its first thermo-contact surface, 14a coordinates (as shown in phantom in Figure 1) with thermistor 11, and the heat that the heat that conducted compares when the second thermo-contact surface 14b by larger than first surface 14a carries out thermo-contact, thermistor 11 is transmitted to radiator 12 is low.

Like this, mounting technique person, by the thermo-contact zone 13 of selecting when mounted thermistor 11 juxtapositions to press, determines that in use thermistor 11 is transmitted to the heat of radiator 12 and is transmitted to thus the heat that is encapsulated in environment in box 22.

In abutment wall 15, the expanded area in the hole 21 in thermo-contact bearing 16, shape and limit in advance the thermocontact area of location positioning between thermistor 11 and abutment wall 15 and the heat exchanged thus between them, this thermocontact area and heat depend on selected installation constitution.

In practice, find, the present invention realized target and the purpose proposed and a kind of adjustable heater is provided, and this heater can adjust heat in use to be dissipated when it is installed, thereby heats the environment that is provided with therein heater.

Can also the Application standard parts according to heater of the present invention, can revise it and construct to adjust the heat by producing.In fact, in different installations, can use the thermistor with same nominal performance number, this thermistor is arranged in the zones of different contacted with radiator heat, and provides required heat for environment to be heated.

Therefore the present invention of imagination can stand multiple modification and modification, and all these is within the scope of appended claims; All details all can further be replaced with other technical equivalent element.

In fact, the material used (as long as they are compatible with concrete purposes) and possible shape and size, can be as requested with the state of prior art and for arbitrarily.

The application requires the priority of No. PD2009A000030th, disclosures in Italian patent application, this with referring to mode introduce its content.

All follow the drawings attached mark after the technical characterictic of mentioning in arbitrary claim, comprising these Reference numerals is only in order to increase the intelligibility of claims, so these Reference numerals do not have any restriction for the explanation of each element by the identification of these Reference numerals.

Claims

1. a heater (10), described heater, for the accommodation box held for the mechanical device of the actuator shaft of manual control electric circuit breaker, comprising:

– thermistor (11), described thermistor has positive temperature coefficient,

– radiator (12),

It is characterized in that, described heater also comprises:

– abutment wall (15), described abutment wall is used for supporting described radiator (12) and described thermistor (11), and has for the bearing (16) with described thermistor (11) thermo-contact, when mounted, described thermistor (11) and described bearing (16) juxtaposition

And wherein, described radiator (12) has with described thermistor (11) but at least two favored area (13 of thermo-contact, 13a, 13b), but described favored area has and is designed to from (11) thermo-contact of described thermistor and has the surface (14a of different expanded areas, 14b), when mounted, described thermistor (11) but with described favored area (13,13a, selection area juxtaposition contact 13b), described selection area is based on as required and predetermined heat flow and limiting.

2. heater as claimed in claim 1, it is characterized in that, described radiator (12) has radiating fin (17), described radiating fin is outstanding from the first surface (18) of described radiator, described first surface is contrary with the second surface (19) of described radiator, for with described thermistor (11) but the described favored area (13) of thermo-contact is arranged on described second surface, but the pre-localized area (13a) of described favored area has groove (20), described groove is for reducing the surface in order to contact.

3. heater as claimed in claim 1, it is characterized in that, in use, described thermistor (11) is included between described radiator (12) and described abutment wall (15), described radiator (12) is fixed in described abutment wall, and described thermistor (11) and described bearing (16) but at least one pre-qualifying part thermo-contact and with described favored area (13) in a regional thermo-contact.

4. heater as claimed in claim 1, is characterized in that, for the described bearing (16) of thermo-contact, has hole, and described hole is for reducing the surface with described thermistor (11) thermo-contact.

5. heater as claimed in claim 1, is characterized in that, described radiator is made of aluminum.