CN106196790B - A kind of compressor assembly, compressor preheating device control device and method - Google Patents
A kind of compressor assembly, compressor preheating device control device and method Download PDFInfo
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- CN106196790B CN106196790B CN201610567734.7A CN201610567734A CN106196790B CN 106196790 B CN106196790 B CN 106196790B CN 201610567734 A CN201610567734 A CN 201610567734A CN 106196790 B CN106196790 B CN 106196790B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
Abstract
The present invention provide a kind of compressor assembly, compressor preheating device control device and method.The control device of the preheating device of the compressor, comprising: environment temperature detection unit, delivery temperature detection unit and control unit；The environment temperature detection unit is used to detect the environment temperature of the compressor local environment；Delivery temperature detection unit is used to detect the delivery temperature of the compressor；And control unit is used to control opening or closing for the preheating device of the compressor according to the environment temperature and the delivery temperature when compressor is opened.Above scheme according to the present invention, the opening and closing of the preheating device of compressor are controlled by combining environmental temperature and the delivery temperature of compressor, it can be realized accurate control compressor heat tape to open, be also capable of the consumption of the reduction electric energy of minimum degree as the case may be.
Description
Technical field
The present invention relates to the controls of technical field of electric appliances more particularly to a kind of compressor assembly, the preheating device of compressor
Device and method.
Background technique
Compressor in air-conditioning system needs to preheat the compressor using preheating device, such as heat tape.
Specifically, for example, by the way that the heat tape to be bonded with the cylinder body of compressor, heat tape fever is to pre- by compressor
Heat.
For preferably compressor is preheated, energy saving and the consideration for preventing hydrops etc., need to electric heating
Band is controlled.In existing air-conditioning system, simple delivery temperature is generallyd use to the control of the heat tape to control.
That is, the delivery temperature of detection compressor, the heat tape of close compressor when the delivery temperature is greater than a certain temperature, as the row
Temperature degree opens compressor heat tape when being less than another temperature value.Although this method reaches to a certain extent to be prevented
The purpose of hydrops, however still can not achieve accurate control and energy conservation and other effects.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of compressor assemblies, the control device of the preheating device of compressor
And method, it is able to achieve the unlatching of the preheating device of accurate control compressor, reduces the consumption of electric energy.
According to the first aspect of the invention, a kind of control device of the preheating device of compressor is provided, comprising:
Environment temperature detection unit, delivery temperature detection unit and control unit；
The environment temperature detection unit is used to detect the environment temperature of the compressor local environment；Delivery temperature detection
Unit is used to detect the delivery temperature of the compressor；And control unit is used for when compressor is opened, according to the environment
Temperature and the delivery temperature control opening or closing for the preheating device of the compressor.
Further, control unit includes: first comparator, the second comparator and judging unit；
First comparator exports comparison result for comparing environment temperature and a predetermined temperature；Second comparator is used for
Compare the delivery temperature and the environment temperature, and exports comparison result；Judging unit compares according to first comparator and second
Compared with the comparison result output control signal of device, for controlling opening or closing for the preheating device.
Further, when environment temperature is less than or equal to predetermined temperature, if delivery temperature is greater than or equal to the environment temperature
Degree with the first value and, then control unit output controls signal, close the preheating device；It should if delivery temperature is less than or equal to
Environment temperature and second value and, wherein second value is less than the first value, then control unit output control signal, is opened described pre-
Thermal.
Further, if delivery temperature be greater than the environment temperature and the second value and, and be less than the environment temperature and
The sum of first value, then control unit output control signal, maintains the current state of the preheating device.
Further, the environment temperature is simultaneously greater than a low temperature threshold for being less than the predetermined temperature.
Further, when environment temperature is greater than predetermined temperature, if delivery temperature is greater than or equal to the environment temperature and the
The sum of three values, then control unit output control signal, closes the preheating device；If delivery temperature is less than or equal to the environment temperature
Degree with the 4th value and, wherein the 4th value be less than third value, then control unit output controls signal, open the preheating device.
Further, if delivery temperature be greater than the environment temperature and the 4th value and, and be less than the environment temperature and
The sum of the third value, then control unit output control signal, maintains the current state of the preheating device.
Further, the environment temperature is greater than the high temperature threshold value of the predetermined temperature less than one simultaneously.
According to the second aspect of the invention, a kind of control method of the preheating device of compressor is provided, comprising:
The environment temperature detecting step detects the environment temperature of the compressor local environment；
Delivery temperature detection, detects the delivery temperature of the compressor；And
Rate-determining steps control the compressor according to the environment temperature and the delivery temperature when compressor is opened
Preheating device open or close.
Further, rate-determining steps include:
First comparison step compares environment temperature and a predetermined temperature, and exports comparison result；
Second comparison step, the delivery temperature and the environment temperature, and export comparison result；And
Judgment step is used for according to the comparison result output control signal in the first comparison step and the second comparison step
Control opening or closing for the preheating device.
Further, when environment temperature is less than or equal to predetermined temperature, if delivery temperature is greater than or equal to the environment temperature
Degree with the first value and, then in rate-determining steps, output control signal, close the preheating device；If delivery temperature is less than or waits
In the environment temperature and second value and, wherein second value is less than the first value, then in rate-determining steps, output control signal is opened
The preheating device.
Further, if delivery temperature be greater than the environment temperature and the second value and, and be less than the environment temperature and
The sum of first value, then in rate-determining steps, output control signal maintains the current state of the preheating device.
Further, the environment temperature is simultaneously greater than a low temperature threshold for being less than the predetermined temperature.
Further, when environment temperature is greater than predetermined temperature, if delivery temperature is greater than or equal to the environment temperature and the
The sum of three values, then in rate-determining steps, output control signal closes the preheating device；If delivery temperature is less than or equal to the ring
Border temperature and the 4th value and, wherein the 4th value is less than third value, then in rate-determining steps, output control signal, unlatching is described pre-
Thermal.
Further, if delivery temperature be greater than the environment temperature and the 4th value and, and be less than the environment temperature and
The sum of the third value, then in rate-determining steps, output control signal maintains the current state of the preheating device.
Further, the environment temperature is greater than the low temperature threshold of the predetermined temperature less than one simultaneously.
According to the third aspect of the invention we, a kind of compressor assembly is provided, comprising:
Compressor, the preheating device and control device as described in any one of the above embodiments that the compressor is preheated.
The control device of the preheating device of compressor assembly and compressor of the invention and control method are carried out above
Explanation.Above scheme according to the present invention controls the pre- of compressor by combining environmental temperature and the delivery temperature of compressor
The opening and closing of thermal, the preheating device such as heat tape that can be realized accurate control compressor are opened, also being capable of basis
The consumption of the reduction electric energy of the minimum degree of concrete condition.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of compressor assembly according to one preferred embodiment of the present invention.
Fig. 2 is the structural schematic diagram according to the control device of one embodiment of the present invention.
Fig. 3 is the flow chart according to the control method of one embodiment of the present invention.
Fig. 4 is the flow chart according to a specific embodiment of control method of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Fig. 1 is combined to describe compressor assembly according to the present invention and the control of its preheating device for being included first
Device.Fig. 1 is shown including the structural schematic diagram according to the compression moulding thermomechanical components of the control device of a preferred embodiment.Such as figure
Shown in 1, the compressor assembly includes compressor C, to the compressor C preheating device H preheated and preheating device
Control device CL.The compressor C is the compressor of air-conditioning system.Preheating device H, for example, heat tape, for pressing
The compressor is preheated when contracting machine C is out of service.It should be noted that the preheating device H is not limited to heat tape,
The heating element of other forms, such as electric heating coil etc. can also be used.
The control device CL includes environment temperature detection unit 1, delivery temperature detection unit 2 and control unit 3.Institute
Environment temperature detection unit 1 is stated for detecting the environment temperature of the compressor local environment.Delivery temperature detection unit 2 is used for
Detect the delivery temperature of the compressor.And control unit 3 is used for when compressor is opened, according to the environment temperature and institute
It states delivery temperature and controls the preheating device of the compressor and open or close.
Above scheme according to the present invention controls compressor by combining environmental temperature and the delivery temperature of compressor
The opening and closing of preheating device can be realized accurate control compressor heat tape and open, also can as the case may be most
The consumption of the reduction electric energy of few degree.
The environment temperature detection unit 1 and delivery temperature detection unit 2, for example, temperature sensing package, to be able to achieve to environment
Subject to the detection of temperature and compressor exhaust temperature, and the temperature value that can be will test is sent to control unit 3, with for pair
The control of preheating device.
Fig. 2 shows the structural schematic diagrams of control unit 3 according to one preferred embodiment of the present invention.As shown in Fig. 2, control
Unit 3 preferably includes first comparator 31, the second comparator 32 and judging unit 33.First comparator 31 is for comparing ring
Border temperature and a predetermined temperature, and comparison result is exported to judging unit 33.Second comparator 32 is for the exhaust temperature
Degree and the environment temperature, and comparison result is sent to judging unit 33.Judging unit 33 is according to first comparator 31 and
The comparison result output control signal of two comparators 32, for controlling opening or closing for the preheating device H.
Specifically, when environment temperature is less than or equal to a predetermined temperature, if delivery temperature is greater than or equal to the environment temperature
Degree with the first value and, then control unit output controls signal, close the preheating device；It should if delivery temperature is less than or equal to
Environment temperature with less than the first value second value and, then control unit output controls signal, open the preheating device；And
Further, if delivery temperature be greater than the environment temperature and the second value and, be less than the environment temperature and first value
Sum, then control unit output control signal, maintains the current state of the preheating device, and even current state is opening state
State then maintains the open state, if current state is in off state, maintains the closed state.
Further, when environment temperature is greater than the predetermined temperature, if delivery temperature is greater than or equal to the environment temperature
With third value and, then control unit output control signal, close the preheating device；If delivery temperature is less than or equal to the ring
Border temperature be less than third value the 4th value and, then control unit output controls signal, open the preheating device；And into
One step, if delivery temperature be greater than the environment temperature and the 4th value and, less than the environment temperature and the third value
With, then control unit output control signal, maintains the current state of the preheating device, and even current state is open state,
The open state is then maintained, if current state is in off state, maintains the closed state.
It is further preferred that environment temperature regional according to used in air-conditioning system is needed to be set lower than the predetermined temperature
The low temperature threshold of degree and high temperature threshold value higher than the predetermined temperature occur to prevent air-conditioning system in the process of running
The case where overflowing temperature range.
Specifically, the predetermined temperature, low temperature threshold and the high temperature threshold value area according to used in air-conditioning system
Environment temperature be arranged using experiment, for example, if using the area surroundings temperature of the air-conditioning system be -15 DEG C to 48 DEG C this
The temperature range of sample, then it is 20 DEG C that the predetermined temperature, which can be set, and low temperature threshold is -16 DEG C and high temperature threshold value is 50 DEG C.And
And first value, second value, third value and the 4th value can be obtained according to experiment simulation or empirical value is determined, from
And make the compressor that can achieve the effect that not hydrops also not waste of energy at work in preheating device.It may be noted that
It is that, although the first value, second value, third value and the 4th value are all the temperature difference, expression and significance is not identical.Specifically, because drawing
The temperature region divided is different, and the time that temperature generates the state of refrigerant is also different, and the first value and second value belong to low temperature model
The interior temperature difference is enclosed, at relatively low ambient temperatures, the time that the heating of refrigerant needs is longer, and liquid refrigerants is more, so needing
The value of first value and second value is arranged relatively large.And third value and the 4th value belong to the temperature difference in high temperature range,
The heating of refrigerant needs the time shorter under the environment temperature of high temperature, and liquid refrigerants is less, it is possible to third value and the 4th value
Value be arranged relatively small.By the way that the value of above-mentioned parameter is rationally arranged, it can well solve and exist in existing control program
The problem of, to realize that the present invention prevents the purpose of hydrops and energy saving.
Illustrate the control method of the preheating device of compressor according to one preferred embodiment of the present invention below in conjunction with Fig. 3, such as
Shown in Fig. 3, the control method includes: environment temperature detecting step S1, delivery temperature detecting step S2 and rate-determining steps S3.
The environment temperature detecting step S1 detects the environment temperature of the compressor local environment.Delivery temperature detects S2, detects institute
State the delivery temperature of compressor.And rate-determining steps S3, when compressor is opened, according to the environment temperature and exhaust temperature
Degree controls opening or closing for the preheating device of the compressor.
Rate-determining steps S3 preferably includes the first comparison step, the second comparison step and judgment step.First compares step
Suddenly, compare environment temperature and a predetermined temperature, and export comparison result.Second comparison step, the delivery temperature and institute
Environment temperature is stated, and exports comparison result.Judgment step, according to the comparison exported in the first comparison step and the second comparison step
As a result output control signal, for controlling opening or closing for the preheating device H.
Specifically, when environment temperature is less than or equal to a predetermined temperature, if delivery temperature is greater than or equal to the environment temperature
Degree with the first value and, then in rate-determining steps, output control signal, close the preheating device；If delivery temperature is less than or waits
In the environment temperature and the second value less than the first value and, then in rate-determining steps, output control signal, the unlatching pre- hot charging
It sets.And further, if delivery temperature be greater than the environment temperature and the second value and, less than the environment temperature with it is described
The sum of first value, then in rate-determining steps, output control signal maintains the current state of the preheating device, even current state
For open state, then the open state is maintained, if current state is in off state, maintains the closed state.
Further, when environment temperature is greater than the predetermined temperature, if delivery temperature is greater than or equal to the environment temperature
With third value and, then in rate-determining steps, output control signal, close the preheating device；If delivery temperature is less than or equal to
The environment temperature and the 4th value that is less than third value and, then in rate-determining steps, output control signal, the unlatching pre- hot charging
It sets.And further, if delivery temperature be greater than the environment temperature and the 4th value and, less than the environment temperature with it is described
The sum of third value, then in rate-determining steps, output control signal maintains the current state of the preheating device, even current state
For open state, then the open state is maintained, if current state is in off state, maintains the closed state.
Illustrate the control device according to the present invention below in conjunction with Fig. 4 and its realizes the specific embodiment of control method.Fig. 4
Show the flow chart of a specific embodiment of the control method according to the present invention.If preheating device is heat tape, first
It is respectively n1-n4 to the 4th value, the environment temperature that detects is T ring, delivery temperature is T row and the predetermined temperature is Tt.
It should be noted, however, that above-mentioned setting is exemplary only, the present invention is not limited thereto.As shown in figure 4, in air-conditioning system
Electricity is detected, and control unit tentatively judges compressor heat tape by checking whether compressor is opened, if compression
Machine is open state, and compressor heat tape is closed, if compressor is shutdown status, compressor heat tape is opened.
Compressor is shutdown status, first by detection T ring, T row, obtains the two temperature value.
When T ring is less than or equal to Tt, if T row >=T ring+n1 compressor heat tape is closed.If T row≤T ring+n2 compressor
Heat tape is opened.If T ring+n2 < T arranges < T ring+n1 and keeps current operating conditions.
When T ring is greater than Tt, if T row >=T ring+n3 compressor heat tape is closed.If T row≤T ring+n4 compressor electric heating
Band is opened.If T ring+n4 < T arranges < T ring+n3 and keeps current operating conditions.
The control device of the preheating device of compressor assembly and compressor of the invention and control method are carried out above
Explanation.Above scheme according to the present invention controls the pre- of compressor by combining environmental temperature and the delivery temperature of compressor
The opening and closing of thermal can be realized accurate control compressor heat tape and open, also can be minimum as the case may be
The consumption of the reduction electric energy of degree.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, this hair is still fallen within
In the range of bright technical solution.
Claims (24)
1. a kind of control device of the preheating device of compressor, comprising:
Environment temperature detection unit, delivery temperature detection unit and control unit；
The environment temperature detection unit is used to detect the environment temperature of the compressor local environment；Delivery temperature detection unit
For detecting the delivery temperature of the compressor；And control unit is used for when compressor is opened, according to the environment temperature
Opening or closing for the preheating device of the compressor is controlled with the delivery temperature, wherein
When environment temperature is less than or equal to predetermined temperature, if delivery temperature is greater than or equal to the environment temperature and the first value
With, then control unit output control signal, close the preheating device；If delivery temperature is less than or equal to the environment temperature and the
The sum of two-value, wherein second value is less than the first value, then control unit output control signal, opens the preheating device.
2. control device as described in claim 1, wherein
Control unit includes: first comparator, the second comparator and judging unit；
First comparator exports comparison result for comparing environment temperature and a predetermined temperature；Second comparator is for comparing
The delivery temperature and the environment temperature, and export comparison result；Judging unit is according to first comparator and the second comparator
Comparison result output control signal, for controlling opening or closing for the preheating device.
3. control device as described in claim 1, wherein
If delivery temperature be greater than the environment temperature and the second value and, and be less than the environment temperature and first value
With, then control unit output control signal, maintain the current state of the preheating device.
4. control device as claimed in claim 2, wherein
If delivery temperature be greater than the environment temperature and the second value and, and be less than the environment temperature and first value
With, then control unit output control signal, maintain the current state of the preheating device.
5. control device according to any one of claims 1-4, wherein
The environment temperature is simultaneously greater than a low temperature threshold for being less than the predetermined temperature.
6. control device according to any one of claims 1-4, wherein
When environment temperature is greater than predetermined temperature, if delivery temperature be greater than or equal to the environment temperature and third value and, control
Unit output control signal processed, closes the preheating device；If delivery temperature is less than or equal to the environment temperature and the 4th value
With, wherein the 4th value is less than third value, then control unit output control signal, opens the preheating device.
7. control device as claimed in claim 5, wherein
When environment temperature is greater than predetermined temperature, if delivery temperature be greater than or equal to the environment temperature and third value and, control
Unit output control signal processed, closes the preheating device；If delivery temperature is less than or equal to the environment temperature and the 4th value
With, wherein the 4th value is less than third value, then control unit output control signal, opens the preheating device.
8. control device as claimed in claim 6, wherein
If delivery temperature be greater than the environment temperature and the 4th value and, and be less than the environment temperature and the third value
With, then control unit output control signal, maintain the current state of the preheating device.
9. control device as claimed in claim 7, wherein
If delivery temperature be greater than the environment temperature and the 4th value and, and be less than the environment temperature and the third value
With, then control unit output control signal, maintain the current state of the preheating device.
10. control device as claimed in claim 5, wherein
The environment temperature is greater than the high temperature threshold value of the predetermined temperature less than one simultaneously.
11. control device as claimed in claim 6, wherein
The environment temperature is greater than the high temperature threshold value of the predetermined temperature less than one simultaneously.
12. control device as claimed in claim 7, wherein
The environment temperature is greater than the high temperature threshold value of the predetermined temperature less than one simultaneously.
13. a kind of control method of the preheating device of compressor, comprising:
Environment temperature detecting step detects the environment temperature of the compressor local environment；
Delivery temperature detection, detects the delivery temperature of the compressor；And
Rate-determining steps control the pre- of the compressor according to the environment temperature and the delivery temperature when compressor is opened
Thermal opens or closes, wherein
When environment temperature is less than or equal to predetermined temperature, if delivery temperature is greater than or equal to the environment temperature and the first value
With, then in rate-determining steps, output control signal, close the preheating device；If delivery temperature is less than or equal to the environment temperature
With second value and, wherein second value is less than the first value, then in rate-determining steps, output control signal opens the pre- hot charging
It sets.
14. method as claimed in claim 13, wherein rate-determining steps include:
First comparison step compares environment temperature and a predetermined temperature, and exports comparison result；
Second comparison step, the delivery temperature and the environment temperature, and export comparison result；And
Judgment step, according to the comparison result output control signal in the first comparison step and the second comparison step, for controlling
The preheating device opens or closes.
15. method as claimed in claim 13, wherein
If delivery temperature be greater than the environment temperature and the second value and, and be less than the environment temperature and first value
With, then in rate-determining steps, output control signal, maintain the current state of the preheating device.
16. method as claimed in claim 14, wherein
If delivery temperature be greater than the environment temperature and the second value and, and be less than the environment temperature and first value
With, then in rate-determining steps, output control signal, maintain the current state of the preheating device.
17. such as the described in any item methods of claim 13-16, wherein
The environment temperature is simultaneously greater than a low temperature threshold for being less than the predetermined temperature.
18. such as the described in any item methods of claim 13-16, wherein
When environment temperature is greater than predetermined temperature, if delivery temperature be greater than or equal to the environment temperature and third value and, control
In step processed, output control signal closes the preheating device；If delivery temperature is less than or equal to the environment temperature and the 4th value
Sum, wherein the 4th value be less than third value, then in rate-determining steps, output control signal, open the preheating device.
19. method as claimed in claim 17, wherein
When environment temperature is greater than predetermined temperature, if delivery temperature be greater than or equal to the environment temperature and third value and, control
In step processed, output control signal closes the preheating device；If delivery temperature is less than or equal to the environment temperature and the 4th value
Sum, wherein the 4th value be less than third value, then in rate-determining steps, output control signal, open the preheating device.
20. method as claimed in claim 18, wherein
If delivery temperature be greater than the environment temperature and the 4th value and, and be less than the environment temperature and the third value
With, then in rate-determining steps, output control signal, maintain the current state of the preheating device.
21. method as claimed in claim 19, wherein
If delivery temperature be greater than the environment temperature and the 4th value and, and be less than the environment temperature and the third value
With, then in rate-determining steps, output control signal, maintain the current state of the preheating device.
22. method as claimed in claim 18, wherein
The environment temperature is greater than the high temperature threshold value of the predetermined temperature less than one simultaneously.
23. such as the described in any item methods of claim 19-21, wherein
The environment temperature is greater than the high temperature threshold value of the predetermined temperature less than one simultaneously.
24. a kind of compressor assembly, comprising:
Compressor, the preheating device and the described in any item controls dresses of such as claim 1-12 that the compressor is preheated
It sets.
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| CN109612023A (en) * | 2018-12-12 | 2019-04-12 | 宁波奥克斯电气股份有限公司 | A kind of compressor heating tape control method and air conditioner |
| CN110701056B (en) * | 2019-10-28 | 2021-05-14 | 宁波奥克斯电气股份有限公司 | Preheating control method and device for compressor, compressor and air conditioner |
| CN110836553A (en) * | 2019-11-13 | 2020-02-25 | 广东美的暖通设备有限公司 | Control method of heat pump system |
| CN111664556A (en) * | 2020-05-07 | 2020-09-15 | 广州视源电子科技股份有限公司 | Oil temperature heating belt control method and device of heat pump air conditioner and heat pump air conditioner |
| CN113847687A (en) * | 2021-09-18 | 2021-12-28 | 珠海格力电器股份有限公司 | Preheating control method and device for compressor |
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| CN104848482A (en) * | 2015-05-05 | 2015-08-19 | 青岛海尔空调器有限总公司 | Preheating control method of air conditioner compressor |
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