CN203859064U - Thermoswitch - Google Patents
Thermoswitch Download PDFInfo
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- CN203859064U CN203859064U CN201420270180.0U CN201420270180U CN203859064U CN 203859064 U CN203859064 U CN 203859064U CN 201420270180 U CN201420270180 U CN 201420270180U CN 203859064 U CN203859064 U CN 203859064U
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- China
- Prior art keywords
- cover plate
- thermoswitch
- cylindrical portion
- conducting terminal
- plate
- Prior art date
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- Expired - Lifetime
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- 239000000463 material Substances 0.000 claims abstract description 30
- 238000009413 insulation Methods 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims description 58
- 239000011347 resin Substances 0.000 claims description 58
- 238000012856 packing Methods 0.000 claims description 20
- 239000011810 insulating material Substances 0.000 claims description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000004634 thermosetting polymer Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000011162 core material Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 14
- 230000036461 convulsion Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Compressor (AREA)
Abstract
Provided is a thermoswitch. The thermoswitch comprises a sealing container formed by a metal container with an open end and a cover plate welded at the open end in an airtight manner, the cover plate is provided with two penetrating through holes, two conductive terminal pins are inserted into the through holes, the two conductive terminal pins are respectively fixed into the two through holes via insulation filling material in an airtight and electric insulation manner, the conductive terminal pins employ copper as the core material, a thermo-sensitive plate is arranged in the sealing container, the thermo-sensitive plate is in a plate shape by stamping forming and inverts in the bending direction in a setting temperature, the outer part of the cover plate is provided with protruding cylindrical portions to form the through holes, the plate thickness of the cylindrical portions is smaller than the plate thickness of the cover plate, and the outer part of the cover plate is provided with insulating layers covering the cylindrical portions, the insulation filling materials and one portions of the conductive terminal pins. According to the thermoswitch, the thickness of the cylindrical portions is smaller than the thickness of the cover plate, the heating of the conductive terminal pins can be more effectively transmitted to the surfaces of the cylindrical portions, and the heat conductivity is greatly improved compared with the conventional thermoswitch.
Description
Technical field
The utility model relates to the protective device-thermoswitch of a kind of sealed electrical compressor inside.
Background technology
The thermoswitch that is used as the protective device of sealed electrical compressor inside forms closed container by metallic casing and cover plate, and this closed container inside is provided with can be to the temperature-sensitive plate of bending direction jerk reversion at fixed temperature.On the cover board inserted conducting terminal pin, this conducting terminal pin is by airtight the fixing on the cover board of the electrical insulating property packing materials such as glass.On the top that is positioned at closed container inside of this conducting terminal pin, directly or be indirectly fixed wtih break by support.One end of temperature-sensitive plate is fastened on closed container inner side by support etc.On the other end of temperature-sensitive plate, be fixed wtih movable contact.This movable contact and break form pair of switches contact.
This thermoswitch is installed in the closed container of sealed electrical compressor, as the protective device of electric motor for compressor, that is, is used as thermal protector.When the periphery generation abnormal high temperature of thermoswitch, or while there is abnormal high temperature in the inside that flows into abnormal current thermoswitch in motor, thereby temperature-sensitive plate can carry out jerk reversion, contact is separated, and makes compressor enter non-power status with this.And, below temperature drops to set point of temperature time, the temperature-sensitive plate reset condition of can jerk reversing back, thus make movable contact and break closure, make compressor enter "on" position with this.
As thermoswitch, ideal, be communicated to rapidly inside by the temperature that makes thermoswitch outside, or, inner temperature is diffused to outside rapidly, thereby thermoswitch is moved at suitable temperature.But, as shown in Figure 9 and Figure 10, in existing thermoswitch 100, the electrical insulating property resin 121 that the most face in cover plate 104 outsides of formation closed container 102 is all used as cladding material covers, and this resin 121 has hindered the heat conductivity of closed container 102 greatly.Therefore, how to improve the heat conductivity of the closed container that forms thermoswitch body, become the problem of art technology research and development.On the other hand, this type of electrical insulating property resin is in order to ensure the insulation distance between cover plate and conducting terminal pin, just arranges and is covered on cover plate and conducting terminal pin.The technical field that the utility model is related, i.e. built-in protector, requirement at least will be guaranteed insulation (creepage) distance of 2mm.But, only, only by the packing material of fixed conductive terminals pin, be difficult to guarantee the insulation distance of 2mm.Therefore, by guaranteeing necessary insulation distance with this type of electrical insulating property resin.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of thermoswitch, in electrical insulating property resin is set guarantees insulation distance, can improve again the heat conductivity of closed container.The technical scheme that the utility model adopts is as follows:
A kind of thermoswitch, comprises by having the metal container made of openend and being welded in by hermetic seal the closed container that the cover plate of openend forms,
Described cover plate has the through hole of two break-through, is wherein inserting respectively two conducting terminal pins; Two conducting terminal pins are insulated respectively the airtight and electric insulation of filler and are fixed in two through holes; Described conducting terminal pin is using copper as core; One end that one of them conducting terminal pin is positioned at described closed container is fixed wtih fixed contact, and one end that another conducting terminal pin is positioned at described closed container is fixed wtih one end of heater;
The other end of described heater is fixedly connected on described cover plate conductively;
In described closed container, be provided with temperature-sensitive plate, the moulding that is stamped of described temperature-sensitive plate is dish shape, can its bending direction of reversion under design temperature; Described temperature-sensitive plate one end is fixed on the inside of described closed container conductively; The other end of described temperature-sensitive plate is fixed wtih travelling contact, and described travelling contact and described fixed contact form a pair of corresponding switching contact;
When described switching contact welding, described heater fusing, thus cut off circuit;
Described cover plate is cylindrical and form by certain outstanding cylindrical portion of height to outside, and described cylindrical portion connects cover plate and forms described through hole, and the thickness of slab of this cylindrical portion is less than the thickness of slab of cover plate;
Described cover plate outside has insulating barrier, and described insulating barrier covers a part for described cylindrical portion, described insulating packing and described conducting terminal pin;
Described insulating barrier is the thermosetting resin of electrical insulating property material.
Further, in above-mentioned thermoswitch, described thermosetting resin is by being, after the fusing of circular thermoset resin material is solidified, to make in its part that covers described cylindrical portion, described insulating packing and described conducting terminal pin machine-shaping.
Further, in above-mentioned thermoswitch, on the insulating packing of fixed conductive terminals pin, seamlessly airtight being fixed wtih by thermal endurance inorganic insulating material, described thermal endurance inorganic insulating material has sufficient dielectric strength, and is set to the shape that can not make to occur between conducting terminal pin and cover plate creeping discharge.
Preferably, in above-mentioned thermoswitch, described thermal endurance inorganic insulating material is made up of pottery.
Preferably, in above-mentioned thermoswitch, described temperature-sensitive plate is double-metal sheet type.
Preferably, in above-mentioned thermoswitch, described temperature-sensitive plate is three sheet types.
Preferably, in above-mentioned thermoswitch, the main component of described thermosetting resin is epoxy resin.
Preferably, in above-mentioned thermoswitch, the cover plate thickness of slab that the thickness of slab of described cylindrical portion is less than 60%.
The topmost technical characterictic of thermoswitch of the present utility model is, the through hole of fixed conductive terminals pin is by from cover plate, to outside, outstanding cylindrical portion forms, electrical insulating property resin coating is placed on cylindrical portion, on packing material and conducting terminal pin, the thickness of slab of cylindrical portion shape into the thickness of slab than cover plate thin.
Thus, the most of face that forms the outside of the cover plate of closed container can all not covered by resin, and just the few part including the end of cylindrical portion is covered by resin.Therefore, all by compared with the prior art that resin covered, the heat conductivity that forms the closed container of thermoswitch body is greatly improved with most of face in cover plate outside.In addition, because through hole is by from cover plate, to outside, outstanding cylindrical portion forms, so can maintain original thickness of packing material (glass).So, both can maintain original intensity at the position that conducting terminal pin is set, and can reduce again the most thickness of cover plate, therefore, the heat conductivity of closed container is improved greatly.In addition, from the outstanding part of the cover plate cylindrical portion outstanding to outside, increase the surface area of cover plate entirety, increased heat transfer area, also can make whereby the heat conductivity of closed container be improved.
Further, by being less than the thickness of cover plate by the plate thickness machine-shaping of cylindrical portion, can improve the heat conductivity of closed container.
Further, by the plate thickness of cylindrical portion being processed into 60% little than cover sheet thickness, can make to flow through because of the operating current of compressor the heating of the conducting terminal pin producing, by electric insulating quality filler, more effectively be delivered to the surface of cylindrical portion, be dispersed in the cold media gas of compressor inside from the surface of cylindrical portion again, thereby can suppress the heating malfunction that thermoswitch produces because of the running current of motor.
In thermoswitch of the present utility model, electrical insulating property resin is thermosetting resin.Shape before the resin material fusing of formation resin, preferably internal diameter is larger than the external diameter of conducting terminal pin, and external diameter adds that than the external diameter of cylindrical portion the size after 2mm is little.Like this, the resin material after fusing, because surface tension rests on the end of cylindrical portion, can further not spread.Therefore, can guarantee that the part of the conducting terminal pin including the end of cylindrical portion is covered by resin, can also make the heat conductivity of closed container obtain raising really.Further, the external diameter of the resin material before fusing can be to add the little size of size after 2mm than the external diameter of cylindrical portion, and more desirable size is to add the little size of size after 1mm than the external diameter of cylindrical portion.In addition, preferably to deduct size after 2mm than the external diameter of cylindrical portion large for the external diameter of the resin material before fusing.
The core of the conducting terminal pin of thermoswitch of the present utility model is made up of copper, and the heat-conductive characteristic of this structure is good, also can carry out heat conduction, thereby heat conductivity is got a greater increase by this conducting terminal pin.
Brief description of the drawings
Fig. 1 is the sectional arrangement drawing of the thermoswitch that relates in embodiment;
Fig. 2 is the thermoswitch drawing in side sectional elevation along the II-II line indicating in Fig. 1;
Fig. 3 is the end view of thermoswitch;
Fig. 4 is the vertical view of thermoswitch;
Fig. 5 is the major part enlarged diagram of state before resin material fusing;
Fig. 6 is the outside drawing of protective device;
Fig. 7 is that the installation of thermoswitch and protective device illustrates intention one;
Fig. 8 is that the installation of thermoswitch and protective device illustrates intention two;
Fig. 9 is the sectional arrangement drawing of existing thermoswitch;
Figure 10 is the end view of existing thermoswitch.
Embodiment
A kind of execution mode of the thermoswitch that the utility model motor compressor thermal protector (protective device) uses is described below in conjunction with accompanying drawing.
If Fig. 1 is to as shown in Fig. 4, form the resistance to pressure closed container 2 of the body of thermoswitch 1, be to be formed by metal container made 3 and cover plate 4.Metal container made 3 is made the material punching presses such as iron plate, and the two ends of its length direction are dome shape substantially, and the cross section that connects the central portion at above-mentioned two ends is semicircle, and metal container made 3 entirety are long round roof shape.Cover plate 4 is processed by iron plate, is Long Circle, on the airtight openend that is welded on metal container made 3 such as annular projection welding.
The inside that by support 5, one end of temperature-sensitive plate 6 is fastened on to closed container 2, this support 5 is to be made by metallic plate.This temperature-sensitive plate 6 is to be shaped to shallow disc shape by deformable materials processings of heat such as bimetal leaf or three sheet metals, so in the time reaching set point of temperature, its bending direction can carry out jerk reversion.The other end of temperature-sensitive plate 6 is fixed wtih movable contact 7.Fix the part of support 5 and make its distortion by press closed container 2 from outside, adjust the contact between movable contact 7 and break 8 (aftermentioned), thereby be setting by the reversion action temperature correction of temperature-sensitive plate 6.
Cover plate 4 is provided with through hole 4A, 4B.At above-mentioned through hole 4A, in 4B, by electrical insulating property packing materials 9 such as glass (considering the glass of thermal coefficient of expansion) by traditional pressure sealing formula hermetic seal, respectively airtight insulation be fixed wtih conducting terminal pin 10A, 10B.Above-mentioned conducting terminal pin 10A, 10B is made up of the composite material using copper as core.Near the top ends that is positioned at closed container 2 inner sides of conducting terminal pin 10A, be fixed with contact supporting pieces 11, be fixed wtih break 8 this contact supporting pieces 11 with on corresponding position movable contact 7.
Near the top ends that is positioned at closed container 2 inner sides of conducting terminal pin 10B, be fixed with the one end as the heater 12 of heater.The other end of heater 12 is fixed on cover plate 4 (inner side one side).This heater 12 around arranges round conducting terminal pin 10B, and substantially parallel with temperature-sensitive plate 6, and the heating of heater 12 can pass to temperature-sensitive plate 6 effectively.
With reference to Fig. 2, on heater 12, be provided with the 12A of fusing portion that cross-sectional area is less than other parts.As the compressor of object of protection, in the time running well, the operating current of motor 204 (being described in detail later, with reference to Fig. 8) can not fuse the 12A of fusing portion.In addition, when motor 204 enters stall state, temperature-sensitive plate 6 jerk reversion at short notice, thus contact 7,8 is separated, therefore, the now fusing 12A of portion also can not fuse.The long-term on-off action that repeats of thermoswitch 1, while finally exceeding the action frequency of guarantee, movable contact and break welding, cannot separate.If the now rotor generation stall of motor 204, excessive electric current can make the temperature rise of the 12A of fusing portion, its fusing the most at last, thus can guarantee to cut off the energising to motor 204.
At fixed conductive terminals pin 10A, on the packing material 9 of 10B, seamlessly airtight being fixed wtih by pottery, such as the thermal endurance inorganic insulating material 13 of the formations such as zirconia (zirconium dioxide).Above-mentioned thermal endurance inorganic insulating material 13 has sufficient dielectric strength, and is set the shape for not making to occur between conducting terminal pin and cover plate creeping discharge.Therefore, even if the metal object of dispersing occurring when heater 12 fuses is attached on the surface of thermal endurance inorganic insulating material 13, also can keep sufficient insulating properties, and can prevent that the arc transfer producing between fusing portion is between conducting terminal pin 10B and cover plate 4, or conducting terminal pin 10A, between 10B.
While flowing into common operating current (comprising short time starting current) to motor 204, the contact 7 of thermoswitch 1, the 8th, in closing the state of closing, thus, the circuit being made up of conducting terminal pin 10A-break supporting pieces 11-break 8-movable contact 7-temperature-sensitive plate 6-temperature-sensitive plate support 5-container 3-cover plate 4-heater 12-conducting terminal pin 10B is maintained, and therefore continues to carry out to the energising of motor 204.On the other hand, thereby when increasing, the load of motor 204 causes the electric current Continuous-flow mistake larger than normal conditions, or there is stall in motor 204, more than it's the several seconds is past locked rotor current Continuous-flow greatly, or the refrigerant in the withstand voltage gas-tight container 202 of motor compressor 201 (being described in detail later) (hermetic type casing) occurs in the situations such as abnormal high temperature, the bending direction of temperature-sensitive plate 6 can jerk reversion make contact 7,8 separate, cut off foregoing circuit, thereby cut off the energising to motor 204.Afterwards, when the temperature of thermoswitch 1 inside drops to set point of temperature, the bending direction of temperature-sensitive plate 6 can again reverse and make contact 7,8 closures, starts to switch on to motor 204.
A part for the cover plate 4 of thermoswitch 1 is tubular (in the present embodiment for cylindric) and forms by the outstanding cylindrical portion 4Aa of certain height to outside, 4Bb, cylindrical portion 4Aa, 4Bb connects cover plate and forms through hole 4Aa, the cover sheet thickness that the thickness of slab of this cylindrical portion of 4Bb is less than 60%, and, above-mentioned cylindrical portion 4Aa, the top (top ends) of 4Bb and packing material 9 and conducting terminal pin 10A, the electrical insulating property resin 21 that a part (near part packing material 9) of 10B is used as covering covers.This resin 21, such as using the thermosetting resin of stable on heating epoxy resin within the scope of the serviceability temperature with thermoswitch etc.And above-mentioned resin 21 at least must all cover the surface of packing material 9, therefore, resin 21 be shaped as diameter at least sphere more than 3.6mm for well.Can guarantee thus cover plate 4 and conducting terminal pin 10A, between 10B, have sufficient insulation distance (at least insulation distance more than 2mm).In addition, cylindrical portion 4Aa, the overhang of 4Bb and the size of diameter etc., can be according to circumstances change setting suitably.
Next, 21 of above-mentioned resins are covered to cylindrical portion 4Aa, the top of 4Bb and packing material 9 and conducting terminal pin 10A, the manufacture method of the thermoswitch 1 of a part of 10B describes.As shown in Figure 5, be the outstanding cylindrical portion 4Aa of tubular by cover plate 4 to outside, the through hole 4A that the hole of 4Bb and perforation cover plate 4 forms, in 4B, inserts conducting terminal pin 10A, 10B.Afterwards, with packing material 9, by above-mentioned conducting terminal pin 10A, 10B insulation is fixed on described through hole 4A, in 4B.Cylindrical portion 4Aa under this state, a kind of circular resin circle 21A as resin material is settled at the top of 4Bb, then, by this resin circle 21A is dissolved and is solidified, make it be covered in cylindrical portion 4Aa, the top of 4Bb and packing material 9 and conducting terminal pin 10A, in a part of 10B.
As shown in Figure 5, above-mentioned resin circle 21A is for there being the circular of certain thickness (such as 1mm).And the inner diameter D 1 of this resin circle 21A is at least than conducting terminal pin 10A, the outer diameter D 2 of 10B is large.In the present embodiment, the inner diameter D 1 of resin circle 21A is 1.8mm.
In addition, the outer diameter D 3 of above-mentioned resin circle 21A is preferably than cylindrical portion 4Aa, and the outer diameter D 4 of 4Bb adds that 2mm later dimension D 5 is little.More preferably,, than cylindrical portion 4Aa, the outer diameter D 4 of 4Bb adds that 1mm later dimension D 6 is little.In the present embodiment, cylindrical portion 4Aa, the external diameter of 4Bb is about 5mm.The external diameter of resin circle 21A is 5.5mm, than cylindrical portion 4Aa, the external diameter (5mm) of 4Bb adds that the later dimension D of 2mm 5 (7mm) is little, and also than cylindrical portion 4Aa, the external diameter of 4Bb (5mm) adds that the later dimension D of 1mm 6 (6mm) is little.
In addition, the size of the outer diameter D 3 of resin circle 21A is preferably than cylindrical portion 4Aa, and it is large that the external diameter of 4Bb deducts the later size of 2mm, more preferably, than cylindrical portion 4Aa, the large size of the external diameter of 4Bb (cylindrical portion 4Aa, the external diameter of 4Bb deducts the size after 0mm).In the present embodiment, the external diameter of resin circle 21A is 5.5mm, and than cylindrical portion 4Aa, it is large that the external diameter of 4Bb (5mm) deducts the later size of 2mm (3mm), and also than cylindrical portion 4Aa, the external diameter of 4Bb (5mm) is large.
That is to say, the maximum admissible dimension of the outer diameter D 3 of resin circle 21A is, cylindrical portion 4Aa, and the external diameter of 4Bb adds the size that 2mm is later, more preferably, and cylindrical portion 4Aa, the external diameter of 4Bb adds the size that 1mm is later.The minimum admissible dimension of the external diameter of resin circle 21A is, cylindrical portion 4Aa, and the external diameter of 4Bb deducts the later size of 2mm, more preferably, and cylindrical portion 4Aa, the consistent size of external diameter of 4Bb.The outside dimension of resin circle 21A in the present embodiment is set as being included in the 5.5mm of (than cylindrical portion 4Aa, the external diameter of 4Bb is large, and than cylindrical portion 4Aa, the external diameter of 4Bb adds 1mm little scope later) in better scope.
In addition, the total amount (total amount at a place) of design resin 21, in other words, when the total amount (a needed resin total amount of resin circle) of resin circle 21A, need to consider through hole 4A, the opening footpath of 4B, cylindrical portion 4Aa, the diameter dimension of 4Bb, conducting terminal pin 10A, the diameter dimension of 10B, the character of resin material (for example, whether whether the viscosity of resin material, easily flow, easily dissolve) etc. key element.In addition, resin 21 preferably can be at cylindrical portion 4Aa, the top gassing of 4Bb etc., and packing material 9 all can be covered.Therefore, the total amount of resin 21 (the resin total amount of resin circle 21A) must be the sufficient amount that can realize above-mentioned state.In addition, for making resin can not be attached to conducting terminal pin 10A, the unnecessary part of 10B, need to control the total amount of resin circle 21A, and while preventing from dissolving, resin is along conducting terminal pin 10A, and 10B spreads to unnecessary part.
Installation example while being arranged in sealed electrical compressor below in conjunction with Fig. 6 to Fig. 8 to the thermoswitch 1 forming by above-mentioned manufacture method manufacture describes.
As shown in Figure 6, thermoswitch 1 is above-mentioned structure, and the base 32 being formed by electrical insulating property synthetic resin etc. keeps fixing, formation protective device 31.In this base 32, be fixed wtih terminal for connecting parts 33 by insert molding.These terminal for connecting parts 33 are positioned on the end 33A of base 32 inner sides and are fixed with the conducting terminal pin 10A that forms thermoswitch 1, are positioned at the end in base 32 outsides as blade terminal 33B.
In addition, be arranged on another terminal for connecting parts 34 on base 32, paste the assigned position being fastened at base 32 by elastic clip.The end 34A that is positioned at base 32 inner sides of terminal for connecting parts 34 is upper, is welded with the conducting terminal pin 10B that forms thermoswitch 1.The other end of terminal for connecting parts 34 is as the sleeve terminal 34B being connected with aftermentioned airtight terminal pin.The protected wall 32A in a part of side of the container 3 of thermoswitch 1 wraps up.But, between protective bulkhead 32A and container 3, be not bonded to each other, but be provided with gap.Therefore refrigerant can flow in this gap, and carries out heat exchange between container 3.
As shown in Figure 7 and Figure 8, this protective device 31 is mounted in withstand voltage gas-tight container 202 inside of sealed electrical compressor 201.The withstand voltage gas-tight container 202 of motor compressor 201 is provided with airtight terminal 203.The sleeve terminal 34B of protective device 31 is connected and fixed with one of them terminal pins of the airtight terminal 203 that has multiple terminal pins.On this terminal pins 203A, be welded with blade terminal.By mutually combining of blade terminal and sleeve terminal 34B, thereby prevent that protective device 31 from rotating on terminal pins 203A.The main coil 204A (with reference to Fig. 8) of the terminal for connecting parts 33 of protective device 31 and motor 204 is connected., protective device 31 series connection are arranged between power supply and motor 204.Thus, when motor compressor 201 occurs when abnormal, thereby thermoswitch 1 will move and cuts off the power supply to motor 204.
As mentioned above, in thermoswitch 1 of the present utility model, fixed conductive terminals pin 10A, the through hole 4A of 10B, 4B gives prominence to by a part for cover plate 4 the cylindrical portion 4Aa forming to outside, the hole one of 4Bb and perforation cover plate 4 forms, and 21 of electrical insulating property resins are covered in above-mentioned cylindrical portion 4Aa, 4Bb and packing material 9 and conducting terminal pin 10A, a part of 10B.Therefore, can greatly improve the heat conductivity of the closed container 2 of the body that forms thermoswitch 1.
The utility model is not only limited to above-described embodiment, as long as not departing from the scope of purport of the present utility model, can carry out various distortion or expansion.Such as, resin 21 is covered in cylindrical portion 4Aa, beyond the top of 4Bb, also can cover cylindrical portion 4Aa, the side of 4Bb.
Claims (8)
1. a thermoswitch, is characterized in that, comprises the closed container being made up of at the cover plate of this openend the gentle seal weld of metal container made with openend,
On described cover plate, there is the through hole of two break-through, wherein inserting respectively two conducting terminal pins; Two conducting terminal pins are insulated respectively the airtight and electric insulation of filler and are fixed in two through holes; Described conducting terminal pin is using copper as core; One end that one of them conducting terminal pin is positioned at described closed container is fixed wtih fixed contact, and one end that another conducting terminal pin is positioned at described closed container is fixed wtih one end of heater;
The other end of described heater is fixedly connected on described cover plate conductively;
In described closed container, be provided with temperature-sensitive plate, the moulding that is stamped of described temperature-sensitive plate is dish shape, can its bending direction of reversion under design temperature; Described temperature-sensitive plate one end is fixed on the inside of described closed container conductively; The other end of described temperature-sensitive plate is fixed wtih travelling contact, and described travelling contact and described fixed contact form a pair of corresponding switching contact;
When described switching contact welding, described heater fusing, thus cut off circuit;
Described cover plate is cylindrical and form by certain outstanding cylindrical portion of height to outside, and described cylindrical portion connects cover plate and forms described through hole, and the thickness of slab of this cylindrical portion is less than the thickness of slab of cover plate;
Described cover plate outside has insulating barrier, and described insulating barrier covers a part for described cylindrical portion, described insulating packing and described conducting terminal pin;
Described insulating barrier is the thermosetting resin of electrical insulating property material.
2. thermoswitch according to claim 1, it is characterized in that, described thermosetting resin is by being, after the fusing of circular thermoset resin material is solidified, to make in its part that covers described cylindrical portion, described insulating packing and described conducting terminal pin machine-shaping.
3. thermoswitch according to claim 1, it is characterized in that, on the insulating packing of fixed conductive terminals pin, the seamlessly airtight thermal endurance inorganic insulating material that has been fixed wtih, described thermal endurance inorganic insulating material has sufficient dielectric strength, and is set to the shape that can not make to occur between conducting terminal pin and cover plate creeping discharge.
4. thermoswitch according to claim 3, is characterized in that, described thermal endurance inorganic insulating material is made up of pottery.
5. thermoswitch according to claim 1, is characterized in that, described temperature-sensitive plate is double-metal sheet type.
6. thermoswitch according to claim 1, is characterized in that, described temperature-sensitive plate is three sheet types.
7. according to the thermoswitch described in any one in claim 1 to 6, it is characterized in that, the main component of described thermosetting resin is epoxy resin.
8. according to the thermoswitch described in any one in claim 1 to 6, it is characterized in that the cover plate thickness of slab that the thickness of slab of described cylindrical portion is less than 60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270180.0U CN203859064U (en) | 2014-05-23 | 2014-05-23 | Thermoswitch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420270180.0U CN203859064U (en) | 2014-05-23 | 2014-05-23 | Thermoswitch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203859064U true CN203859064U (en) | 2014-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420270180.0U Expired - Lifetime CN203859064U (en) | 2014-05-23 | 2014-05-23 | Thermoswitch |
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| Country | Link |
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| CN (1) | CN203859064U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017125068A1 (en) * | 2016-01-21 | 2017-07-27 | 瑞侃电子(上海)有限公司 | Temperature cut off breaker |
| CN116018747A (en) * | 2020-09-15 | 2023-04-25 | 株式会社生方制作所 | motor protector |
-
2014
- 2014-05-23 CN CN201420270180.0U patent/CN203859064U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017125068A1 (en) * | 2016-01-21 | 2017-07-27 | 瑞侃电子(上海)有限公司 | Temperature cut off breaker |
| CN116018747A (en) * | 2020-09-15 | 2023-04-25 | 株式会社生方制作所 | motor protector |
| US12483084B2 (en) | 2020-09-15 | 2025-11-25 | Ubukata Industries Co., Ltd. | Motor protector |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |
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| CX01 | Expiry of patent term |