CN202746208U - Temperature control equipment for compressor, compressor component and refrigeration system - Google Patents
Temperature control equipment for compressor, compressor component and refrigeration system Download PDFInfo
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- CN202746208U CN202746208U CN 201220159032 CN201220159032U CN202746208U CN 202746208 U CN202746208 U CN 202746208U CN 201220159032 CN201220159032 CN 201220159032 CN 201220159032 U CN201220159032 U CN 201220159032U CN 202746208 U CN202746208 U CN 202746208U
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- compressor
- temperature
- liquid refrigerant
- liquid
- cryogenic fluid
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Abstract
The utility model discloses temperature control equipment for a compressor, a compressor component and a refrigeration system. The temperature control equipment comprises a temperature detection device, a liquid supply pipeline, a liquid supply valve and a control device, wherein the temperature detection device is used for detecting the temperature of refrigeration fluid at a refrigeration fluid outlet of the compressor; the liquid supply pipeline is used for supplying a liquid refrigerant to the compressor; the liquid supply valve is arranged in the liquid supply pipeline and used for controlling the flow of the liquid refrigerant supplied to the compressor; the control device is used for receiving the temperature value detected by the temperature detection device and controlling the liquid supply valve according to the temperature value, so that the flow of the liquid refrigerant is increased when the temperature value is more than a first threshold value and the flow of the liquid refrigerant is reduced when the temperature value is less than a second threshold value; and the second threshold value is not more than the first threshold value. The temperature control equipment and the temperature control method can solve the problem of the reduced work performance of the compressor caused by rising of the exhaust temperature and guarantee the stable and high-efficiency operation of the compressor.
Description
Technical field
The utility model relates to compressor field, relates in particular to a kind of temperature control device for compressor, a kind of compressor assembly and a kind of refrigeration system.
Background technique
Compressor is as the critical component in the chiller plant, and its working efficiency and stability are paid close attention to widely.In typical chiller plant, compressor and condenser, throttle valve and vaporizer concurrent operation realize refrigeration cycle.Yet, when the lower and condensing temperature of evaporating temperature is higher (especially northerly winter), the delivery temperature (temperature of the cryogenic fluid that namely flows out from the cryogenic fluid outlet of compressor) that compressor may occur raises and the problem of working efficiency reduction.If compressor is worked for a long time, will cause serious harm to compressor itself under this state.
In order to address the above problem, need to a kind ofly can to carry out to the delivery temperature of compressor the apparatus and method of accurate and stable control, thereby guarantee the running of compressor and chiller plant stability and high efficiency.
The model utility content
The purpose of this utility model provides a kind of can carrying out accurately and the temperature control device of stable control the delivery temperature of compressor.
In order to realize above-mentioned model utility purpose, the technical solution of the utility model realizes in the following manner:
According to an aspect of the present utility model, a kind of temperature control device for compressor is provided, comprising:
Temperature-detecting device, described temperature-detecting device is for detection of the temperature of the cryogenic fluid in the cryogenic fluid outlet port of compressor;
Liquid feeding pipeline, described liquid feeding pipeline are used for liquid refrigerant is supplied to described compressor;
Liquid supply valve, described liquid supply valve are arranged in the described liquid feeding pipeline, are used for the flow that control is supplied to the liquid refrigerant of described compressor; With
Control gear, described control gear receives the detected temperature value of described temperature-detecting device and according to described temperature value described liquid supply valve is controlled, so that in the situation that described temperature value is higher than the flow that first threshold increases liquid refrigerant, and in the situation that described temperature value is lower than the flow that Second Threshold reduces liquid refrigerant, described first threshold is more than or equal to described Second Threshold.
Further, described liquid refrigerant can be of identical composition with described cryogenic fluid.
Particularly, described liquid feeding pipeline can also comprise be arranged in compressor draw liquid passage and spray hole, described liquid refrigerant draws the liquid passage and spray hole is supplied in the compression chamber via described.
Further, described liquid supply valve can be expansion valve, and described expansion valve is adjusted the flow of liquid refrigerant by changing stretching degree.
Further, described first threshold can be than Second Threshold large 1 to 5 degree centigrade.
According on the other hand of the present utility model, a kind of compressor assembly is provided, comprising:
Compressor; And
Above-mentioned any temperature control device.
Further, described compressor can be provided with storage case, and described control gear is installed in the described storage case, and described temperature-detecting device is arranged on the cryogenic fluid outlet port of compressor.
Further, described compressor can be scroll compressor.
Further, described liquid feeding pipeline can extend into compressor inside and be communicated with the compression chamber of compressor.
According on the other hand of the present utility model, a kind of refrigeration system is provided, comprising:
Above-mentioned any compressor assembly;
Condenser, the entrance of described condenser is connected with the outlet of the cryogenic fluid of compressor, and the outlet of described condenser is connected with described liquid feeding pipeline;
Throttle valve, the entrance of described throttle valve is connected with the outlet of described condenser; With
Vaporizer, the entrance of described vaporizer is connected with the outlet of described throttle valve, and the outlet of described vaporizer is connected with the cryogenic fluid entrance of compressor.
At least one aspect in the technique scheme of the present utility model can be by to the monitoring of compressor cooling fluid outlet temperature with supply with compressor and come compressor is carried out temperature controlled temperature control device with the liquid refrigerant of flow rates controlled, thereby guarantees the stable of compressor and refrigeration system and effectively work.
Description of drawings
Fig. 1 illustrates the schematic block diagram according to an embodiment's of the present utility model temperature control device that is used for compressor;
Fig. 2 illustrates the schematic structure according to an embodiment's of the present utility model compressor that is used in conjunction with described temperature control device;
Fig. 3 illustrates the schematic block diagram according to an embodiment's of the present utility model refrigeration system; With
Fig. 4 illustrates the flow chart according to an embodiment's of the present utility model temperature control method that is used for compressor.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.In specification, same or analogous drawing reference numeral represents same or analogous parts.Following explanation to the utility model mode of execution is intended to overall model utility design of the present utility model is made an explanation with reference to accompanying drawing, and not should be understood to a kind of restriction of the present utility model.
The schematically illustrated temperature control device 100 that is used for compressor according to an embodiment of the present utility model of Fig. 1.This temperature control device 100 comprises: temperature-detecting device 101, control gear 102, liquid supply valve 103 and liquid feeding pipeline 104.Described temperature-detecting device 101, temperature transducer for example is for detection of the temperature of the cryogenic fluid in the cryogenic fluid outlet port of compressor 200.Described liquid feeding pipeline 104 is used for liquid refrigerant is supplied to described compressor 200, as is supplied to the compression chamber of compressor 200.Described liquid supply valve 103 is arranged in the described liquid feeding pipeline 104, is used for the flow that control is supplied to the liquid refrigerant of described compressor 200.Temperature-detecting device 101 detected temperature values are sent to described control gear 102, for example control circuit board.Control gear 102 receives described temperature-detecting device 101 detected temperature values and according to described temperature value described liquid supply valve 103 is controlled, so that in the situation that described temperature value is higher than the flow that first threshold increases liquid refrigerant, and in the situation that described temperature value is lower than the flow that Second Threshold reduces liquid refrigerant, described first threshold is more than or equal to described Second Threshold.
Description from the part of background technique before as can be known, the temperature of the cryogenic fluid of discharging from compressor 200 (because compressor 200 cryogenic fluid of discharging is gas usually, so be called again delivery temperature) is the important indicator of compressor 200 working conditions.Too high delivery temperature will reduce working efficiency and the reliability of compressor 200.And detect by the delivery temperature of 101 pairs of compressors 200 of temperature-detecting device on the one hand according to the temperature control device 100 of compressor of the present utility model, provide liquid refrigerant by liquid feeding pipeline 104 to compressor 200 on the other hand, this liquid refrigerant can cool off the cryogenic fluid in the compressor 200.Control gear 102 is regulated the flow of the liquid refrigerant that is supplied to compressor 200 according to the temperature value that is detected by temperature-detecting device 101.When temperature value is higher than first threshold, increases the flow of liquid refrigerant, and when temperature value is lower than Second Threshold, reduce the flow of liquid refrigerant, thereby the delivery temperature of compressor 200 is controlled in the rational scope.Described first threshold can be more than or equal to Second Threshold, and for example, first threshold can be than Second Threshold large 1 to 5 degree centigrade, and more specifically, first threshold can be than Second Threshold large 4 degrees centigrade.
In one embodiment, described control gear 102 can be arranged in described temperature value be not higher than first threshold and be not less than the flow of keeping liquid refrigerant in the situation of Second Threshold constant, thereby simplify the control of the flow of liquid towards refrigeration agent.It should be understood by one skilled in the art that in the situation that described temperature value is not higher than first threshold and is not less than the flow that Second Threshold is supplied to the liquid refrigerant of compressor 200 can change yet, as long as can realize reasonable control to delivery temperature.
In one embodiment, the initial value of flow that is supplied to the liquid refrigerant of compressor 200 can be zero.That is to say, from equipment work begins, when temperature-detecting device 101 does not detect delivery temperature and is higher than first threshold, can not supply with liquid refrigerants to compressor 200.This can prevent from causing existing in the compressor 200 too much liquid to lower efficiency owing to blindly supplying with liquid refrigerant.
In one embodiment, in the non-vanishing situation of the flow of the liquid refrigerant that is supplied to compressor 200, described liquid refrigerant can be supplied in the compression chamber of compressor 200 to mix with cryogenic fluid in the compressor 200.Certainly, also can consider for example liquid refrigerant to be placed heat-exchange tube and cryogenic fluid by heat exchange tube wall and compressor 200 carries out heat exchange reaches the cooling purpose.Yet this need to be arranged in heat-exchange tube in the compressor 200, and this will be so that the in-built design of compressor be complicated and may reduce the service behaviour of compressor and increase cost.And adopt liquid refrigerant is supplied in the compression chamber of compressor 200 to mix with cryogenic fluid in the compressor 200, avoided compressor 200 inside that the labyrinth of heat-exchange tube is set, and can be so that refrigeration agent mixes more fully with cryogenic fluid, to improve heat exchange efficiency.
In one embodiment, described liquid refrigerant can with compressor 200 in cryogenic fluid be of identical composition.This helps to utilize fully, circularly cryogenic fluid.Especially in the compression chamber that liquid refrigerant is supplied to compressor 200 with scheme that cryogenic fluid in the compressor 200 mixes in, the be of identical composition liquid refrigerant that can avoid heterogeneity and cryogenic fluid of cryogenic fluid in liquid refrigerant and the compression chamber produces physical-chemical reaction and reduces the problem such as refrigerating efficiency, and can improve so that liquid refrigerant and cryogenic fluid merge fully the utilization ratio of cryogenic fluid.
In one embodiment, the temperature that is supplied to the liquid refrigerant of compressor 200 can be lower than the temperature of the cryogenic fluid in the compressor 200.Yet, can consider that also serviceability temperature is not less than even is higher than the liquid refrigerant of cryogenic fluid, for example liquid refrigerant directly with compressor 200 in cryogenic fluid in the situation that mix in the compression chamber.
In one embodiment, described liquid refrigerant can be the liquid refrigerant that comes from the outlet of condenser.Like this, can utilize to the greatest possible extent cryogenic fluid in the refrigeration cycle.Yet the above-mentioned liquid refrigerant that is supplied to compressor 200 also can otherwise be supplied with, as long as it can satisfy the requirement that the cryogenic fluid in the compressor 200 is cooled off.
In one embodiment, described liquid feeding pipeline 104 can also comprise be arranged in compressor 200 draw liquid passage and spray hole, described liquid refrigerant draws the liquid passage and spray hole is supplied in the compression chamber via described, thereby mixes mutually with cryogenic fluid in the compressor 200.
In one embodiment, liquid supply valve 103 can be expansion valve, step motor type electromagnetic expanding valve for example, and the flow of liquid refrigerant can be adjusted by the stretching degree of expansion valve.
Below with reference to Fig. 2 the compressor assembly that comprises above-mentioned temperature control device is introduced.Described compressor assembly comprises compressor 200 and aforesaid temperature control device 100 for compressor.The temperature control device 100 that is used for compressor can just integrate when dispatching from the factory with compressor 200.For example, in one embodiment, compressor 200 can be provided with storage case, and control gear 102 is installed in the storage case, and described temperature-detecting device 101 is arranged on the cryogenic fluid outlet port of compressor 200.By this way, compressor assembly can be so that whole Transporting, sale and used easily the debugging cost that can also save the space and save assembly by the user.On the contrary, compressor manufacturer only provides the compressor with liquid spraying function at present, need unit manufacturer that the controlling componenies such as control valve are installed voluntarily, but manufacturer is difficult to be configured to and the good controlling component of compressor matching, and the effect of control is undesirable.And the utility model embodiment pass through for each compressor control gear and debugging control device are set, can guarantee the matched well of control gear and compressor, improve the reliability to compressor control.Yet this is not necessary, and in compressor assembly, the parts such as the temperature-detecting device 101 in compressor 200 and the temperature control device 100, control gear 102 also can be discrete structures, link together with necessary electrical connection and stream between them.
Hereinafter will the specific embodiment to compressor assembly be introduced as an example of scroll compressor example, yet the utility model is not limited to this, the compressor of other type also is feasible.
As shown in Figure 2, a kind of exemplary scroll compressor 200 ' mainly comprises: fixed scroll 1 is formed with whirlpool tooth 51 on it; Motion vortex dish 2 is formed with whirlpool tooth 52 on it; Supporting part 3 is used for the assembly that support fixed scroll 1 and motion vortex dish 2 consist of; Bent axle 4 is used for actuation movement scroll 2; Motor 5, it is connected with actuation movement scroll 2 with bent axle 4, makes described motion vortex dish 2 with respect to fixed scroll 1 motion; The housing 6 of general cylindrical shape is used to form the cylindrical shape enclosed space of this scroll compressor 200 ', and to hold each critical piece of scroll compressor 200 ', wherein said housing 6 is welded by upper casing body 22, lower casing body 23 and middle case body 24.The whirlpool tooth 51 of fixed scroll 1 can adopt Milling Process to become spiral yarn shaped, and the whirlpool tooth 52 of motion vortex dish 2 is corresponding with the whirlpool tooth 51 on the fixed scroll 1.At this scroll compressor 200 ' duration of work, bent axle 4 carries out eccentric rotary to form relative movement fixed scroll 1 and motion vortex dish 2 between with respect to fixed scroll 1 at drive motion vortex dish 2 under the driving of motor 5 under the constraint of track device (for example cross mechanism) (not being shown specifically among the figure), and this relative movement causes that the volume of compression chamber constantly reduces in compression process, thereby increase the pressure in the described compression chamber, refrigeration agent is compressed.
In a kind of specific embodiment, fixed scroll 1 is provided with spray hole 21 and fluid passage 11, one end of described fluid passage 11 is communicated with described spray hole 21 fluids, and the other end of described fluid passage 11 is communicated with conduit component 10 fluids, and wherein said conduit component 10 can adopt the modes such as welding to be sealably coupled to described fluid passage 11.Further be provided with connected element 8 in described housing 6 inside, it is communicated with conduit component 10 with external passage component 9, and makes conduit component 10 and external passage component 9 fixing with respect to housing 6.
In the embodiment shown in Figure 2, liquid feeding pipeline 104 comprises external passage component 9, connected element 8, conduit component 10, fluid passage 11 and spray hole 21.Liquid refrigerant under the control of the liquid supply valve (not shown) that links to each other with external passage component 9 successively through external passage component 9, connected element 8, conduit component 10, fluid passage 11 and spray hole 21 be injected into compression chamber 20 with compressor 200 in cryogenic fluid mix mutually to reach cooling-down effect.
Although in embodiment illustrated in fig. 2, the liquid passage that draws that is arranged in compressor 200 is made of conduit component 10 and fluid passage 11, should be appreciated that the structure of drawing the liquid passage is not limited to this.Liquid feeding pipeline 104 can comprise any part that can extend into compressor 200 inside and be communicated with the compression chamber of compressor 200, thereby realizes liquid refrigerant is supplied in the compression chamber of compressor 200.Although above-described embodiment is take scroll compressor as example, but those skilled in the art are to be understood that, also be applicable to various other compressors according to temperature control device of the present utility model, as long as liquid feeding pipeline 104 can be supplied to liquid refrigerant compressor inside, for example in the compression chamber.The compressor that therefore, also can comprise various other types according to compressor assembly of the present utility model.
The utility model also relates to a kind of refrigeration system 1000.As shown in Figure 3, this refrigeration system 1000 comprises: compressor 200, condenser 300, throttle valve 400, vaporizer 500 and according to the temperature control device 100 for compressor of the present utility model.Arrow among Fig. 3 represents the flow direction of cryogenic fluid, liquid refrigerant and the flow direction of signal.The entrance of described condenser 300 is connected with the cryogenic fluid outlet of compressor 200, and the outlet of described condenser 300 is connected with described liquid feeding pipeline 104.The entrance of described throttle valve 400 also is connected with the outlet of described condenser 300.The entrance of described vaporizer 500 is connected with the outlet of described throttle valve 400.The outlet of described vaporizer 500 is connected with the cryogenic fluid entrance of compressor 200.Be supplied to condenser 300 after cryogenic fluid is compressed in compressor 200, through being supplied in the vaporizer 500 after throttle valve 400 decompressions, get back to compressor 200 from vaporizer 500 more afterwards again.Wherein, from a part of cryogenic fluid inflow liquid feeding pipeline 104 that the outlet of condenser 300 is flowed out and as liquid refrigerant, be supplied to as previously mentioned compressor 200, according to the delivery temperature of temperature-detecting device 101 detected compressors 200 compressor carried out temperature control by control gear 102.Under the effect according to the temperature control device 100 for compressor of the present utility model, this refrigeration system 1000 can obtain good working efficiency and stability.
Be directed to above-mentioned temperature control device 100 for compressor, the utility model also relates to a kind of temperature control method for compressor.With reference to Fig. 4 (part that is illustrated by the broken lines among Fig. 4 is optional step), described temperature control method comprises:
Step S602: the temperature of the cryogenic fluid in the cryogenic fluid outlet port by 101 pairs of compressors 200 of temperature-detecting device detects and temperature detection result is sent to control gear 102; With
Step S603: use described control gear 102 to generate the liquid supply valve control signal according to received temperature detection result, and the liquid supply valve control signal is sent to the liquid supply valve 103 that is arranged in the described liquid feeding pipeline 104 so that the flow that is supplied to the liquid refrigerant of described compressor 200 via liquid feeding pipeline 104 is controlled, described liquid supply valve control signal so that liquid supply valve 103 in the situation that described temperature value is higher than the flow that first threshold increases liquid refrigerant, and in the situation that described temperature value is lower than the flow that Second Threshold reduces liquid refrigerant, described Second Threshold is not more than described first threshold.
Wherein, the generation of described liquid supply valve control signal can be by utilizing comparator with detected temperature value and first threshold and Second Threshold compares or realize by means of other threshold determination circuit or program.The control of the flow of described liquid supply valve control signal liquid towards refrigeration agent can realize by the adjusting to the opening degree of liquid supply valve 103.Described control gear is such as being control circuit board, logic control element etc., and it can be independently to install mutually with compressor 200, also can install with compressor 200 one.
In one embodiment, in step S603, described liquid supply valve control signal can be arranged to make liquid supply valve, and to keep the flow of liquid refrigerant not constant in the situation that described temperature value is not higher than first threshold and is not less than Second Threshold.
In one embodiment, can iterative cycles ground execution in step S602 and S603.The delivery temperature that can guarantee like this compressor is automatically maintained in the suitable scope so that compressor can be efficiently, stably work.
In optional embodiment, described temperature control method can also comprise optional step S601 (referring to Fig. 4): before by temperature-detecting device the temperature of the cryogenic fluid of compressor cooling fluid outlet being detected at first, control gear 102 is carried out self check, if control gear 102 is normal with being connected of temperature-detecting device 101, then closing liquid supply valve 103, to make the flow of liquid refrigerant be zero, if control gear 102 is unusual with being connected of temperature-detecting device 101, then control gear 102 quits work and reports to the police.Can avoid like this owing to equipment failure and connectivity problem cause mistake is appearred in the temperature control of compressor.
Although by reference to the accompanying drawings the utility model is illustrated, disclosed embodiment is intended to the utility model preferred implementation is carried out exemplary illustration in the accompanying drawing, and can not be interpreted as a kind of restriction of the present utility model.
Although some embodiments of the utility model general plotting are shown and explanation, those skilled in the art will appreciate that, in the situation of the principle that does not deviate from this overall model utility design and spirit, can make a change these embodiments, scope of the present utility model limits with claim and their equivalent.
Claims (10)
1. a temperature control device that is used for compressor is characterized in that, described temperature control device comprises:
Temperature-detecting device, described temperature-detecting device is for detection of the temperature of the cryogenic fluid in the cryogenic fluid outlet port of compressor;
Liquid feeding pipeline, described liquid feeding pipeline are used for liquid refrigerant is supplied to described compressor;
Liquid supply valve, described liquid supply valve are arranged in the described liquid feeding pipeline, are used for the flow that control is supplied to the liquid refrigerant of described compressor; With
Control gear, described control gear receives the detected temperature value of described temperature-detecting device and according to described temperature value described liquid supply valve is controlled, so that in the situation that described temperature value is higher than the flow that first threshold increases liquid refrigerant, and in the situation that described temperature value is lower than the flow that Second Threshold reduces liquid refrigerant, described first threshold is more than or equal to described Second Threshold.
2. temperature control device according to claim 1 is characterized in that, described liquid refrigerant and described cryogenic fluid are of identical composition.
3. temperature control device according to claim 1 and 2 is characterized in that, described liquid feeding pipeline also comprise be arranged in compressor draw liquid passage and spray hole, described liquid refrigerant draws the liquid passage and spray hole is supplied in the compression chamber via described.
4. temperature control device according to claim 1 and 2 is characterized in that, described liquid supply valve is expansion valve, and described expansion valve is adjusted the flow of liquid refrigerant by changing stretching degree.
5. temperature control device according to claim 1 and 2 is characterized in that, large 1 to 5 degree centigrade than Second Threshold of described first threshold.
6. compressor assembly comprises:
Compressor; And
Each described temperature control device according to claim 1-5.
7. compressor assembly according to claim 6 is characterized in that, described compressor is provided with storage case, and described control gear is installed in the described storage case, and described temperature-detecting device is arranged on the cryogenic fluid outlet port of compressor.
8. according to claim 6 or 7 described compressor assemblies, it is characterized in that, described compressor is scroll compressor.
9. according to claim 6 or 7 described compressor assemblies, it is characterized in that, it is inner and be communicated with the compression chamber of compressor that described liquid feeding pipeline extends into compressor.
10. refrigeration system comprises:
Each described compressor assembly according to claim 6-9;
Condenser, the entrance of described condenser is connected with the outlet of the cryogenic fluid of compressor, and the outlet of described condenser is connected with described liquid feeding pipeline;
Throttle valve, the entrance of described throttle valve is connected with the outlet of described condenser; With
Vaporizer, the entrance of described vaporizer is connected with the outlet of described throttle valve, and the outlet of described vaporizer is connected with the cryogenic fluid entrance of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220159032 CN202746208U (en) | 2012-04-16 | 2012-04-16 | Temperature control equipment for compressor, compressor component and refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220159032 CN202746208U (en) | 2012-04-16 | 2012-04-16 | Temperature control equipment for compressor, compressor component and refrigeration system |
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| Publication Number | Publication Date |
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| CN202746208U true CN202746208U (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220159032 Expired - Lifetime CN202746208U (en) | 2012-04-16 | 2012-04-16 | Temperature control equipment for compressor, compressor component and refrigeration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013155954A1 (en) * | 2012-04-16 | 2013-10-24 | 丹佛斯（天津）有限公司 | Temperature control equipment for compressor, compressor component, and refrigeration system |
-
2012
- 2012-04-16 CN CN 201220159032 patent/CN202746208U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013155954A1 (en) * | 2012-04-16 | 2013-10-24 | 丹佛斯（天津）有限公司 | Temperature control equipment for compressor, compressor component, and refrigeration system |
| CN103375408A (en) * | 2012-04-16 | 2013-10-30 | 丹佛斯（天津）有限公司 | Temperature control device and method for compressor, compressor components and refrigerating system |
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