CN202108684U - Air-conditioner compressor with protector for motor and air-conditioner - Google Patents
Air-conditioner compressor with protector for motor and air-conditioner Download PDFInfo
- Publication number
- CN202108684U CN202108684U CN2011200719134U CN201120071913U CN202108684U CN 202108684 U CN202108684 U CN 202108684U CN 2011200719134 U CN2011200719134 U CN 2011200719134U CN 201120071913 U CN201120071913 U CN 201120071913U CN 202108684 U CN202108684 U CN 202108684U
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- protector
- motor
- temperature
- air condition
- condition compressor
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Abstract
The utility model is dedicated to providing an air-conditioner compressor. The air-conditioner compressor comprises a motor, a compression part and a protector, wherein the motor comprises a stator and a rotor; the compression part can suck air, compress the air and discharge the air; the protector is arranged near the motor, is connected in series in a circuit of the coil of the stator of the motor, and comprises a temperature-sensitive element; when the temperature-sensitive element is heated to a pre-set driving temperature, the protector is tripped off; and the protector further comprises an additional resistance heating device connected in parallel with two ends of the temperature-sensitive element. The utility model is further dedicated to providing the air conditioner comprising an evaporator, a condenser, a throttling component and the air-conditioner compressor.
Description
Technical field
The utility model relates to a kind of air condition compressor with motor protecter, particularly a kind of air condition compressor with motor protecter of band auto-lock function.
Background technique
In the compressor of air conditioner, adopt automatically reset motor protecter usually, be used to detect because excess current that flows to motor that the compressor misoperation causes or ambient temperature raise.This protector generally includes the thermal response bimetallic element of the temperature of response excess current or rising, and protector breaks off the circuit of supplying with current of electric under the situation that overlond running or overheated operation occur, thereby the protection motor avoids burning; After temperature progressively descended, protector automatically reset, and compressor electric motor is restarted immediately.
Under some special states; For example compressor starts under low voltage; May cause stall, but because locked rotor current is very low, the protector tripping is slow to automatically reset still soon; Protector is owing to frequently break off and reset and lost efficacy easily under the stall state like this, and the heat that produces also can cause burn-down of electric motor.Cause burn-down of electric motor in order to guarantee protector can under the stall state, not lose efficacy, the air conditioner field for the stall state under the ability to work of protector strict regulation is arranged.
In specific (special) requirements (GB 4706.17-2004/IEC 60335-2-34:1999) the 19.101st joint of the permissible motor-compressor of State Standard of the People's Republic of China-family expenses and similar applications electrical equipment; Stipulated the to automatically reset locked rotor test of motor-compressor requires motor-compressor protection system to allow under the stall state continuous periodic duty to carry out 15 days or has accomplished 2000 circulations at least.
At USS United States Standard " PROPOSED FIRST EDITION OF THESTANDARD FOR AUTOMATIC ELECTRICAL CONTROLS FORHOUSEHOLD AND SIMILAR USE; PART 2:PARTICULARREQUIREMENTS FOR THERMAL MOTOR PROTECTORS; UL60730-2-2 " in the regulation for the locked rotor test of air conditioner motor protector is also arranged similarly, promptly require protector continuous periodic duty under the stall state to carry out 15 days or accomplished 2000 circulations at least.
Therefore in field of air conditioning; In order to make protector can satisfy the requirement of NBS authentication; And the working life of prolongation protector, the technician is devoted to the material and the structure of compressor protector are improved always for a long time, to increase the periodic duty number of times that protector can stand; Make protector can not lose efficacy, cause burn-down of electric motor owing to frequently breaking off and resetting.
That is to say in field of air conditioning, what the technician considered all the time all is how to improve constantly the periodic duty number of times that protector can stand.
The model utility content
The utility model provides a kind of new way, this thinking is that the long-term cognitive revolutionary character in related domain is improved.The utility model is not devoted to improve the periodic duty number of times that protector can stand, but is devoted to reduce the number of times of protector (for example stall) required periodic duty under extreme case on the contrary.Like this,, and compare, can have the Security of equal extent even higher degree with the higher protector of ability even if the lower protector (the periodic duty number of times that can stand is few) of ability also can be applicable to the protection of air condition compressor.
Specifically, for example make in the utility model that under air condition compressor stall state, in case the protector tripping, only if the user breaks off the air-conditioning power supply, otherwise protector can not automatically reset.Like this, under the stall state, protector can not cause burn-down of electric motor because of breaking off continually and resetting.In view of this new way, though protector do not satisfy prescribed by standard under the stall state, can accomplish 2000 circulations at least, also can be under the stall state the long-time trouble free service of assurance compressor.
A kind of air condition compressor according to the utility model comprises: the motor that is made up of stator and rotor; The press part that sucks gas and its compression is discharged; And be arranged near the protector the motor; Said protector is connected in the circuit of coil of stator of motor; Said protector comprises temperature-sensing element (device); Said protector tripping when said temperature-sensing element (device) is heated to preset actuation temperature, said protector also comprises other resistance heater, said resistance heater is connected in parallel on said temperature-sensing element (device) two ends.
The utility model also relates to a kind of air conditioner, comprising: vaporizer, condenser, throttle part and aforesaid air condition compressor.
Description of drawings
In conjunction with the drawings to the utility model detailed description of preferred embodiment, characteristic of the utility model and advantage will be clearer below.
Fig. 1 has shown the ordinary construction of existing technology protector.
Fig. 2 has shown that protector is in closed state under the compressor normal operating condition.
Fig. 3 has shown that under extremity, protector is in the tripping state.
Fig. 4 has shown that after the user cut off the electricity supply, protector resetted behind certain hour.
Fig. 5 has shown the zoomed-in view of the utility model protector.
Fig. 6 has shown a kind of embodiment of the utility model protector structure.
Embodiment
Domestic air conditioner generally comprises vaporizer, condenser, compressor and throttle part; Compressor mainly comprises the motor that is made up of stator and rotor, suck gas and press part that its compression is discharged and be arranged near the protector the motor, and said protector is connected in the circuit of coil of stator of motor.
Protector generally has overcurrent protection and two kinds of functions of overtemperature protection:
Overcurrent protection: unusual and when exceeding the parameter value that protector sets when the compressor electric motor winding current; The heating value that electric current produces through metal shell, conducting plate, thermosensitive bimetal is along with the increase of electric current increases; When thermosensitive bimetal reaches the temperature of setting, will drive the moving contact upset, moving contact and fixed contact are separated; The motor windings series circuit is broken off, and the protection compressor electric motor can not burnt because of electric current is excessive.
Overtemperature protection: if the compressor inside temperature is too high, the thermosensitive bimetal temperature-sensitive of protector is heated, when temperature reaches setting temperature; Will drive the moving contact upset; Moving contact and fixed contact are separated, the motor windings series circuit is broken off, the protection compressor electric motor can not burnt because of overtemperature.
Existing household air-conditioner compressor protector has polytype; For example the mounting point according to protector can be divided into built-in and external; Type according to institute's protection motor can be divided into protector that is used for three phase electric machine and the protector that is used for two-phase induction motor; Every kind of protector can specifically be subdivided into polytype again, and for example the external protector of Sen Sata company has 3/4 " MP, 4AC; Built-in protector HM series.
The basic ideas of the utility model are on the basis of existing protector, to increase a heater, and it is connected in the two ends of the temperature-sensing element (device) of existing protector in parallel.This temperature-sensing element (device) for example is a bimetallic strip.
Particularly, be example with a kind of internally-arranged type protector of existing technology, as shown in Figure 1, this protector generally comprises header assemblies 1 and lid 2.Header assemblies 1 comprises that tube plate 3 and 4, two end pins 4 of two stainless steel end pins are installed in the hole of tube plate respectively and through glass material and tube plate electrical insulation, thereby provides and being connected of three-phase.Two heaters of being processed by conductive material 5 are welded to respectively on two end pins, to give the fast Moving plate 6 of bimetal heat are provided.These heaters can change different heats is provided for the fast Moving plate of bimetal as required.The welded top of each heater has stationary electrical contacts 8.Another central heater 7 of being processed by conductive material is welded on the tube plate.This central heater also can change as required.The dish assembly is welded to the top of central heater.The dish assembly comprises the fast Moving plate 6 of bimetal, and the weld metal piece is connected to the center of the fast Moving plate 6 of bimetal, and electric contact 9 is in the both side ends of the fast Moving plate 6 of bimetal.Electric contact 9 on the fast Moving plate 6 of bimetal matches with the electric contact 8 at heater 5 tops respectively.In normal running, the fast Moving plate 6 of bimetal has a structure that faces up and omit microprotrusion, and electric contact 8 engages with electric contact 9; Yet when the fast Moving plate 6 of bimetal was heated to selected actuation temperature, the fast Moving plate 6 of this bimetal was to face up and recessed slightly inverse structure with regard to fast transition, thereby its electric contact 9 is disengaged with stationary electrical contacts 8.When the fast Moving plate 6 of bimetal be cooled to subsequently select be lower than the reset temperature of actuation temperature the time, the fast Moving plate 6 of this bimetal becomes the concave configuration that raises up fast again, and its electric contact 9 and stationary electrical contacts 8 keeps engaging.
More than introduced a kind of typical structure of internally-arranged type protector of existing technology, but the utility model is not limited to the improvement to above-mentioned protector, but also can be used for the externally-arranged type protector.Particularly, being example with a kind of typical structure of externally-arranged type protector of existing technology, like Sen Sata company external protector 3/4 " MP, this protector have two external terminals that are connected in the circuit, a termination power, the other end links to each other with compressor.Its core component is to be connected on terminal middle heating wire and bimetal disk.When temperature is too high, bimetal disk escape, disconnecting circuit; When temperature retrieval arrived setting temperature, bimetal disk automatically reset, restoring circuit.
According to an embodiment of the utility model, the protector of the utility model is preferably positive temperature coefficient (PTC) thermistor heater at automatically reset another resistance heater of both sides parallel connections of protector of tradition.Different according to compressor power, PTC requires to satisfy 120V and the requirement of 240V service voltage respectively, and the PTC power selection is a foundation to satisfy the protector auto-lock function.Behind the protector escape, the PTC spontaneous heating must be satisfied the requirement of protector auto-lock function, i.e. the temperature of heating power generation must be higher than protector and set recovery temperature.According to the compressor application scope, the protector recovery temperature generally is set at 90 ℃ to 60 ℃, and this just requires PTC after the protector tripping, and spontaneous thermogenetic temperature is higher than 90 ℃.
Select PTC model and power according to above-mentioned principle, generally, be preferably about 2W for the external protector in the scope of 1-5W.Power selection De Taigao can make temperature too high, causes the bimetallic strip of protector to damage easily; Power selection gets too low, can not have protector is kept reliable effect of breaking off.
As shown in Figure 2, protector 11 is serially connected in the circuit of coil of stator of motor 12, and power switch is closed, and protector is closed, and ptc heater 14 resistances are very little of bypass, the compressor proper functioning.
Fig. 3 illustrates when abnormal state occurring, and for example the compressor stall causes that temperature raises, when the thermosensitive bimetal in the protector 11 is heated to selected actuation temperature; Protector 11 trippings, this moment is because power switch 13 closures of circuit have been executed voltage in the protector both sides; Ptc heater 14 temperature raise, and its resistance sharply raises thereupon, reach the effect of restriction electric current; Like this, compressor just keeps not working always, thereby can not produce compressor motor overheating and the risk of burning.Simultaneously, ptc heater 14 produces heat, makes protector keep tripping.
As shown in Figure 4; Have only when the power switch of circuit 13 breaks off-, do not have voltage in protector 11 both sides, so for example through user's powered-down; When the thermosensitive bimetal in the protector 11 be cooled to subsequently select be lower than the reset temperature of actuation temperature the time, protector 11 automatically resets.Ptc heater 14 temperature descend automatically, return to low resistive state again.As user once more after the opening power, air-conditioning begins proper functioning again.
In addition, the protector of above-mentioned mode of execution is used to protect three phase electric machine, and it also can be used for single phase motor.Particularly, during single-phase application, PTC and the parallel connection of protector body; Three phase time PTC are parallel to three-phase protective and have a high regard for meaning two phases, to satisfy the requirement of three-phase open-phase protection.
Fig. 5 has shown the zoomed-in view of the utility model protector, clearly show that wherein ptc heater 14 is connected in parallel on the two ends of protector 11.
Fig. 6 has shown a kind of embodiment of the utility model protector structure.This protector comprises pedestal 21 and two terminals 22, has comprised the parts of traditional protection devices such as thermosensitive bimetal in pedestal 21 inside, and two terminals 22 are connected in the motor windings circuit.This protector also comprises ptc heater 14, is connected in parallel on the two ends of thermosensitive bimetal.
Certainly; The protector of the utility model is not limited to above structure; As long as satisfy the protection domain that following condition just falls into the utility model, that is, in case said protector tripping; Then only be disconnected when thermosensitive bimetal is cooled to be lower than preset reset temperature and the circuit power of presetting actuation temperature, said protector just automatically replies.The designing requirement of this kind protector is a prerequisite for not changing existing compressor producer and air-conditioning producer use habit.
According to the air conditioner compressed motor protector of the utility model, stall for example under extreme case, protector can not break off and reset continually, causes burn-down of electric motor.In view of this new way, reduced requirement to air condition compressor periodic duty ability.Therefore, can adopt the low protector of cycle-index, both satisfy the requirement of compressor trouble free service, reduce the cost of protector again for air condition compressor.Even what protector did not satisfy prescribed by standard can accomplish 2000 circulations at least under the stall state, also can be under the stall state the long-time trouble free service of assurance compressor.
The above is merely the preferred implementation of the utility model; But the utility model protection domain is not limited thereto; Any those skilled in the art is in the disclosed technical scope of the utility model; Can change at an easy rate or change, and this change or variation all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claims.
Claims (11)
1. air condition compressor with motor protecter comprises:
The motor that constitutes by stator and rotor;
The press part that sucks gas and its compression is discharged; And
Be arranged near the protector the motor, said protector is connected in the circuit of coil of stator of motor, and said protector comprises temperature-sensing element (device), said protector tripping when said temperature-sensing element (device) is heated to preset actuation temperature,
It is characterized in that,
Said protector also comprises other resistance heater, and said resistance heater is connected in parallel on said temperature-sensing element (device) two ends.
2. air condition compressor according to claim 1 is characterized in that:
Said resistance heater is the posistor heater.
3. air condition compressor according to claim 1 is characterized in that: said temperature-sensing element (device) is a thermosensitive bimetal.
4. according to arbitrary described air condition compressor among the claim 1-3, it is characterized in that: after circuit power broke off, the temperature-sensing element (device) temperature descended until automatically reseting, and the ptc heater temperature descends until returning to low resistive state automatically.
5. according to arbitrary described air condition compressor among the claim 1-3, it is characterized in that: said protector is built-in protector.
6. according to arbitrary described air condition compressor among the claim 1-3, it is characterized in that: said protector is the external protector.
7. according to arbitrary described air condition compressor among the claim 1-3, it is characterized in that: the power of said posistor heater is 1-5 watt.
8. according to the air condition compressor described in the claim 7, it is characterized in that: the power of said posistor heater is 2 watts.
9. according to arbitrary described air condition compressor among the claim 1-3, it is characterized in that: said motor is a three phase electric machine.
10. according to arbitrary described air condition compressor among the claim 1-3, it is characterized in that: said motor is a single phase motor.
11. an air conditioner is characterized in that, said air conditioner comprises: vaporizer, condenser, throttle part and as above-mentioned claim 1-10 in arbitrary described air condition compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200719134U CN202108684U (en) | 2011-03-18 | 2011-03-18 | Air-conditioner compressor with protector for motor and air-conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200719134U CN202108684U (en) | 2011-03-18 | 2011-03-18 | Air-conditioner compressor with protector for motor and air-conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202108684U true CN202108684U (en) | 2012-01-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200719134U Expired - Lifetime CN202108684U (en) | 2011-03-18 | 2011-03-18 | Air-conditioner compressor with protector for motor and air-conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202108684U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678508A (en) * | 2011-03-18 | 2012-09-19 | 森萨塔科技（常州）有限公司 | Air conditioner compressor provided with motor protector, and air conditioner |
| CN107269507A (en) * | 2017-07-03 | 2017-10-20 | 佛山市顺德区海伦宝电器有限公司 | A kind of water pump dry combustion method protection circuit |
| CN108551220A (en) * | 2017-10-20 | 2018-09-18 | 台州市双龙泵业有限公司 | A kind of energy-efficient water pump stall, overload, phase shortage burn-free motor |
-
2011
- 2011-03-18 CN CN2011200719134U patent/CN202108684U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678508A (en) * | 2011-03-18 | 2012-09-19 | 森萨塔科技（常州）有限公司 | Air conditioner compressor provided with motor protector, and air conditioner |
| CN107269507A (en) * | 2017-07-03 | 2017-10-20 | 佛山市顺德区海伦宝电器有限公司 | A kind of water pump dry combustion method protection circuit |
| CN108551220A (en) * | 2017-10-20 | 2018-09-18 | 台州市双龙泵业有限公司 | A kind of energy-efficient water pump stall, overload, phase shortage burn-free motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120111 |
|
| CX01 | Expiry of patent term |