CN110220263B - Operation control method, control device, air conditioner and storage medium - Google Patents
Operation control method, control device, air conditioner and storage medium Download PDFInfo
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- CN110220263B CN110220263B CN201910625816.6A CN201910625816A CN110220263B CN 110220263 B CN110220263 B CN 110220263B CN 201910625816 A CN201910625816 A CN 201910625816A CN 110220263 B CN110220263 B CN 110220263B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides an operation control method, an operation control device, an air conditioner and a storage medium, wherein the operation control method comprises the following steps: detecting working condition parameters of the second air return port, and determining a corresponding saturation threshold value according to the working condition parameters; and generating an adjusting parameter of the air conditioner system according to a comparison result between the working condition parameter and the saturation threshold, wherein the adjusting parameter is used for adjusting the refrigerant flow between the gas-liquid separator and the second return air port. According to the technical scheme, the liquid impact risk of the compressor is reduced by reducing the flow of the refrigerant between the gas-liquid separator and the second return air port, so that the refrigerant at the second return air port is in an overheated state, and the stability and the safety of the operation of the air conditioner system are improved.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to an operation control method, an operation control device, an air conditioner and a computer readable storage medium.
Background
Among the correlation technique, independent compression system is in order to improve the system efficiency, through setting up vapour and liquid separator, separates the gaseous refrigerant and the liquid refrigerant through the condenser, wherein, directly imports the compressor with the gaseous refrigerant, imports the evaporimeter with the liquid refrigerant to when reducing the compressor consumption, promote heat exchange efficiency, nevertheless have following defect:
in a system starting state or other unstable states, the gas-liquid separator is easy to generate a liquid full phenomenon, so that liquid impact risks are generated on the compressor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, it is an object of the present invention to provide an operation control method.
Another object of the present invention is to provide an operation control device.
Another object of the present invention is to provide an air conditioner.
It is another object of the present invention to provide a computer-readable storage medium.
In order to achieve the above object, according to an embodiment of a first aspect of the present invention, there is provided an operation control method including: detecting working condition parameters of the second air return port, and determining a corresponding saturation threshold value according to the working condition parameters; and generating an adjusting parameter of the air conditioner system according to the comparison result between the working condition parameter and the saturation threshold, wherein the adjusting parameter is used for adjusting the refrigerant flow between the gas-liquid separator and the second air return port.
The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a reversing assembly, wherein a gas-liquid separator is arranged on a flow path between the indoor heat exchanger and the outdoor heat exchanger, the compressor comprises a first air cylinder and a second air cylinder, a first air return port is arranged on the first air cylinder and connected with the reversing assembly, a second air return port is arranged on the second air cylinder and connected with the gas-liquid separator.
In the technical scheme, an independent compression system is arranged in the air conditioner, a return air port of a second air cylinder in the independent compression system can be communicated with a gas-liquid separator arranged between the indoor heat exchanger and the outdoor heat exchanger, in order to reduce the probability of liquid impact generated by the second return air port, working condition parameters of the second return air port are collected, a corresponding saturation threshold value is calculated based on the working condition parameters, the working condition parameters are compared with the saturation threshold value, whether current operation parameters are adjusted or not is determined according to a comparison result, when the liquid impact risk is detected, the liquid impact risk to the compressor is reduced by reducing the flow of a refrigerant between the gas-liquid separator and the second return air port, the refrigerant of the second return air port is in an overheated state, and the operation stability and the operation safety of the air conditioner system are improved.
The working condition parameters comprise return air temperature and return air pressure, the return air temperature is collected by arranging a temperature sensor at the second return air port, and the return air pressure is collected by arranging a pressure sensor at the second return air port.
In the above technical scheme, optionally, the operating condition parameter of second return-air inlet is detected to confirm the saturation threshold that corresponds according to the operating condition parameter, specifically include: acquiring the return air temperature and the return air pressure at the second return air port; and calculating corresponding saturation pressure according to the return air temperature, and determining the saturation pressure as a saturation threshold value so as to generate an adjusting parameter according to a comparison result between the return air pressure and the saturation pressure.
The saturation pressure refers to a pressure of the liquid refrigerant and the gaseous refrigerant in a dynamic balance device, that is, in a saturation state, and if the return air pressure is less than the saturation pressure, it indicates that the liquid refrigerant flowing from the gas-liquid separator to the second return air port is excessive, which may cause a liquid impact risk.
As can be understood by those skilled in the art, the return air temperature and the saturation pressure have a one-to-one correspondence, and the return air pressure and the saturation temperature have a one-to-one correspondence.
In any one of the above technical solutions, optionally, generating an adjustment parameter of the air conditioner system according to a comparison result between the operating condition parameter and the saturation threshold includes: and if the return air pressure is detected to be greater than the saturation pressure, controlling to reduce the operating frequency of the compressor.
In the technical scheme, if the return air pressure is detected to be less than the saturation pressure, the liquid refrigerant flowing from the gas-liquid separator to the second return air port is excessive, so that the liquid impact risk is caused, and at the moment, the flow rate of the refrigerant between the gas-liquid separator and the second return air port is reduced by reducing the operating frequency of the compressor, so that the purpose of reducing the liquid impact risk is achieved.
In any one of the above technical solutions, optionally, the air conditioner further includes an indoor heat exchanger and an outdoor heat exchanger, a first throttling device, a gas-liquid separator and a second throttling device are sequentially disposed between the outdoor heat exchanger and the indoor heat exchanger, and according to a comparison result between the operating condition parameter and the saturation threshold, an adjustment parameter of the air conditioner system is generated, which specifically includes: in the cooling mode, if the return air pressure is detected to be larger than the saturation pressure, the opening degree of the first throttling device is controlled to be reduced, and/or the opening degree of the second throttling device is controlled to be increased; in the heating mode, if the return air pressure is detected to be larger than the saturation pressure, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
In the technical scheme, the first throttling device is used for adjusting the flow of the refrigerant between the gas-liquid separator and the outdoor heat exchanger, the second throttling device is used for adjusting the flow of the refrigerant between the indoor heat exchanger and the gas-liquid separator, in a refrigeration mode, the high-temperature and high-pressure refrigerant flows to the gas-liquid separator after being subjected to heat exchange through the outdoor heat exchanger and flows to the indoor heat exchanger through the gas-liquid separator, and at the moment, if the detected return air pressure is greater than the saturation pressure, namely the liquid impact risk of the second return air port is indicated, the opening degree of the second throttling device can be increased and/or the opening degree of the first throttling device can be reduced, so that the flow of the refrigerant from the gas-liquid separator to the second return air port is.
In the heating mode, high-temperature and high-pressure refrigerant flows to the gas-liquid separator after exchanging heat through the indoor heat exchanger, and flows to the outdoor heat exchanger through the gas-liquid separator, and at the moment, if the gas return pressure is detected to be greater than the saturation pressure and the liquid impact risk of the second gas return port is also indicated, the opening degree of the second throttling device can be reduced and/or the opening degree of the first throttling device can be increased, so that the flow of the refrigerant from the gas-liquid separator to the second gas return port is reduced, and the liquid impact risk is reduced.
In the heating mode, if the return air temperature is detected to be lower than the saturation temperature, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
In any one of the above technical solutions, optionally, detecting a working condition parameter of the second return air inlet, and determining a corresponding saturation threshold according to the working condition parameter specifically includes: acquiring the return air temperature and the return air pressure at the second return air port; and calculating corresponding saturation temperature according to the return air pressure, and determining the saturation temperature as a saturation threshold value so as to generate an adjusting parameter according to a comparison result between the return air temperature and the saturation temperature.
The saturation temperature refers to the temperature of the liquid refrigerant and the gaseous refrigerant in the dynamic balance device, namely, in the saturation state, the temperature between the liquid refrigerant and the gaseous refrigerant is equal, and if the return air temperature is lower than the saturation temperature, the liquid refrigerant flowing from the gas-liquid separator to the second return air port is excessive, so that the liquid impact risk is caused.
In any one of the above technical solutions, optionally, generating an adjustment parameter of the air conditioner system according to a comparison result between the operating condition parameter and the saturation threshold includes: and if the return air temperature is detected to be lower than the saturation temperature, controlling to reduce the running frequency of the compressor.
In the technical scheme, if the return air temperature is lower than the saturation temperature, the liquid refrigerant flowing from the gas-liquid separator to the second return air port is excessive to cause liquid impact risk, and at the moment, the flow rate of the refrigerant between the gas-liquid separator and the second return air port is reduced by reducing the operating frequency of the compressor, so that the purpose of reducing the liquid impact risk is achieved.
In any one of the above technical solutions, optionally, the air conditioner further includes an indoor heat exchanger and an outdoor heat exchanger, a first throttling device, a gas-liquid separator and a second throttling device are sequentially disposed between the outdoor heat exchanger and the indoor heat exchanger, and according to a comparison result between the operating condition parameter and the saturation threshold, an adjustment parameter of the air conditioner system is generated, which specifically includes: in the cooling mode, if the return air temperature is detected to be lower than the saturation temperature, controlling to reduce the opening degree of the first throttling device and/or controlling to increase the opening degree of the second throttling device; in the heating mode, if the return air temperature is detected to be lower than the saturation temperature, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
In the technical scheme, the first throttling device is used for adjusting the flow of the refrigerant between the gas-liquid separator and the outdoor heat exchanger, the second throttling device is used for adjusting the flow of the refrigerant between the indoor heat exchanger and the gas-liquid separator, in a refrigeration mode, the high-temperature and high-pressure refrigerant flows to the gas-liquid separator after being subjected to heat exchange through the outdoor heat exchanger and flows to the indoor heat exchanger through the gas-liquid separator, and at the moment, if the liquid impact risk of the second air return port is detected, the opening degree of the second throttling device can be increased and/or the opening degree of the first throttling device can be reduced, so that the flow of the refrigerant from the gas-liquid separator to the second air return port is reduced, and the.
In the heating mode, high-temperature and high-pressure refrigerant flows to the gas-liquid separator after exchanging heat through the indoor heat exchanger, and flows to the outdoor heat exchanger through the gas-liquid separator, and at the moment, if the liquid impact risk of the second air return port is detected, the opening degree of the second throttling device can be reduced and/or the opening degree of the first throttling device can be increased, so that the refrigerant flow from the gas-liquid separator to the second air return port is reduced, and the liquid impact risk is reduced.
In any one of the above technical solutions, optionally, detecting a working condition parameter of the second return air inlet, and determining a corresponding saturation threshold according to the working condition parameter specifically includes: and responding to a starting instruction of the air conditioner, and collecting working condition parameters to determine corresponding saturation threshold values according to the working condition parameters.
In the technical scheme, the detection of the working condition parameters of the second exhaust port can be triggered based on the starting instruction of the air conditioner so as to reduce the liquid impact risk when the air conditioner is started.
In any one of the above technical solutions, optionally, detecting a working condition parameter of the second return air inlet, and determining a corresponding saturation threshold according to the working condition parameter specifically includes: the air conditioner is in an operating state, and working condition parameters are collected according to a preset collection frequency so as to determine corresponding saturation threshold values according to the working condition parameters.
In the technical scheme, in the operation process of the air conditioner, the working condition parameters of the second exhaust port can be acquired according to the preset acquisition frequency, so that whether the operation state is unstable or not is detected based on the relation between the working condition parameters and the corresponding saturation temperature or saturation pressure, and the liquid impact risk in the operation process of the air conditioner is reduced.
According to an aspect of the second aspect of the present invention, there is provided an operation control device including: a memory and a processor; a memory for storing program code; and the processor is used for calling the program codes to execute the operation control method of the technical scheme of the first aspect of the invention.
According to a third aspect of the present invention, there is provided an air conditioner comprising: the operation control device according to the second aspect is described above.
The air conditioner comprises a compressor, wherein the compressor is provided with an exhaust port, a first return air port and a second return air port, a reversing assembly comprises a first port to a fourth port, an indoor heat exchanger and an outdoor heat exchanger, a first end of the indoor heat exchanger is connected with the second port, a second end of the outdoor heat exchanger is connected with the fourth port, and a throttling device comprises a first throttling device and a second throttling device.
According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the operation control method according to any one of the above-described aspects of the first and second aspects.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
through the operating mode parameter of gathering the second return-air inlet to based on operating mode parameter calculation corresponding saturation threshold, compare operating mode parameter and saturation threshold, whether confirm according to the comparison result and adjust current operating parameter, when detecting to have the liquid hammer risk, reduce the liquid hammer risk to the compressor through reducing the refrigerant flow between vapour and liquid separator and the second return-air inlet, and then be favorable to promoting the stability and the security of air conditioner system operation.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 illustrates a schematic configuration of an air conditioner according to an embodiment of the present invention;
FIG. 2 shows a schematic flow diagram of an operation control method according to an embodiment of the invention;
FIG. 3 shows a schematic flow diagram of an operation control method according to another embodiment of the invention;
FIG. 4 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention;
fig. 5 is a schematic view illustrating a flow direction of a refrigerant of an air conditioner according to an embodiment of the present invention;
fig. 6 is a schematic view illustrating a flow direction of a refrigerant in an air conditioner according to another embodiment of the present invention;
FIG. 7 shows a schematic flow diagram of an operation control method according to another embodiment of the invention;
FIG. 8 shows a schematic flow diagram of an operation control method according to another embodiment of the present invention;
fig. 9 shows a schematic block diagram of an operation control device according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The operation control method defined in the present application is suitable for an air conditioner provided with an independent compression system, as shown in fig. 1, the air conditioner includes a compressor 102, an indoor heat exchanger 108, an outdoor heat exchanger 106, and a reversing assembly 104, the compressor 102 has a discharge port and a first and a second return air ports 1022 and 1024; the reversing assembly 104 comprises a first port to a fourth port, a first end of the indoor heat exchanger 108 is connected with the second port, a second end of the outdoor heat exchanger 106 is connected with the fourth port, and the throttling device comprises a first throttling device 112 and a second throttling device 114, wherein the first throttling device 112, the gas-liquid separator 110 and the second throttling device 114 are sequentially arranged between the outdoor heat exchanger 106 and the indoor heat exchanger 108, and according to the cooling and heating air conditioner, whether the liquid impact prevention operation is executed or not is determined based on the detection of the parameters of the second return air port, the probability of liquid impact of the compressor 102 is reduced, and the stability and the safety of the system are improved, wherein the first throttling device 112 is an electronic expansion valve or a solenoid valve, and the second throttling device 114 is any one or a combination of the electronic expansion valve, a capillary tube and the solenoid valve.
As shown in fig. 2, an operation control method according to an embodiment of the present invention includes: step 202, detecting working condition parameters of the second air return port, and determining a corresponding saturation threshold according to the working condition parameters; and 204, generating an adjusting parameter of the air conditioner system according to the comparison result between the working condition parameter and the saturation threshold, wherein the adjusting parameter is used for adjusting the refrigerant flow between the gas-liquid separator and the second return air port.
The air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a reversing assembly, wherein a gas-liquid separator is arranged on a flow path between the indoor heat exchanger and the outdoor heat exchanger, the compressor comprises a first air cylinder and a second air cylinder, a first air return port is arranged on the first air cylinder and connected with the reversing assembly, a second air return port is arranged on the second air cylinder and connected with the gas-liquid separator.
In the technical scheme, an independent compression system is arranged in the air conditioner, a return air port of a second air cylinder in the independent compression system can be communicated with a gas-liquid separator arranged between the indoor heat exchanger and the outdoor heat exchanger, in order to reduce the probability of liquid impact generated by the second return air port, working condition parameters of the second return air port are collected, a corresponding saturation threshold value is calculated based on the working condition parameters, the working condition parameters are compared with the saturation threshold value, whether current operation parameters are adjusted or not is determined according to a comparison result, when the liquid impact risk is detected, the liquid impact risk to the compressor is reduced by reducing the flow of a refrigerant between the gas-liquid separator and the second return air port, the refrigerant of the second return air port is in an overheated state, and the operation stability and the operation safety of the air conditioner system are improved.
The working condition parameters comprise return air temperature and return air pressure, the return air temperature is collected by arranging a temperature sensor at the second return air port, and the return air pressure is collected by arranging a pressure sensor at the second return air port.
Example one
As shown in fig. 3, the operation control method according to another embodiment of the present invention specifically includes: step 302, acquiring return air temperature and return air pressure at a second return air port; step 304, calculating corresponding saturation pressure according to the return air temperature, and determining the saturation pressure as a saturation threshold; in step 306, if the return air pressure is detected to be greater than the saturation pressure, the operation frequency of the compressor is controlled to be reduced.
Example two
As shown in fig. 4, the operation control method according to another embodiment of the present invention specifically includes: step 402, acquiring return air temperature and return air pressure at a second return air port; step 404, calculating a corresponding saturation pressure according to the return air temperature, and determining the saturation pressure as a saturation threshold; step 406, in the cooling mode, if the return air pressure is detected to be greater than the saturation pressure, controlling to reduce the opening degree of the first throttling device and/or controlling to increase the opening degree of the second throttling device; in the heating mode, if the return air pressure is detected to be greater than the saturation pressure, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
The saturation pressure refers to a pressure of the liquid refrigerant and the gaseous refrigerant in a dynamic balance device, that is, in a saturation state, and if the return air pressure is less than the saturation pressure, it indicates that the liquid refrigerant flowing from the gas-liquid separator to the second return air port is excessive, which may cause a liquid impact risk.
As can be understood by those skilled in the art, the return air temperature and the saturation pressure have a one-to-one correspondence, and the return air pressure and the saturation temperature have a one-to-one correspondence.
In any one of the above technical solutions, optionally, generating an adjustment parameter of the air conditioner system according to a comparison result between the operating condition parameter and the saturation threshold includes: and if the return air pressure is detected to be greater than the saturation pressure, controlling to reduce the operating frequency of the compressor.
In the technical scheme, if the return air pressure is detected to be less than the saturation pressure, the liquid refrigerant flowing from the gas-liquid separator to the second return air port is excessive, so that the liquid impact risk is caused, and at the moment, the flow rate of the refrigerant between the gas-liquid separator and the second return air port is reduced by reducing the operating frequency of the compressor, so that the purpose of reducing the liquid impact risk is achieved.
In any one of the above technical solutions, optionally, the air conditioner further includes an indoor heat exchanger and an outdoor heat exchanger, a first throttling device, a gas-liquid separator and a second throttling device are sequentially disposed between the outdoor heat exchanger and the indoor heat exchanger, and according to a comparison result between the operating condition parameter and the saturation threshold, an adjustment parameter of the air conditioner system is generated, which specifically includes: in the cooling mode, if the return air pressure is detected to be larger than the saturation pressure, the opening degree of the first throttling device is controlled to be reduced, and/or the opening degree of the second throttling device is controlled to be increased; in the heating mode, if the return air pressure is detected to be larger than the saturation pressure, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
In the technical scheme, the first throttling device is used for adjusting the flow of the refrigerant between the gas-liquid separator and the outdoor heat exchanger, and the second throttling device is used for adjusting the flow of the refrigerant between the indoor heat exchanger and the gas-liquid separator.
As shown in fig. 5, in the cooling mode, the high-temperature and high-pressure refrigerant flows to the gas-liquid separator after exchanging heat through the outdoor heat exchanger, and flows to the indoor heat exchanger through the gas-liquid separator, and at this time, if it is detected that the return air pressure is greater than the saturation pressure, which indicates the liquid impact risk of the second return air port, the opening degree of the second throttling device may be increased and/or the opening degree of the first throttling device may be decreased, so as to decrease the refrigerant flow from the gas-liquid separator to the second return air port, and decrease the liquid impact risk.
As shown in fig. 6, in the heating mode, the high-temperature and high-pressure refrigerant flows to the gas-liquid separator after exchanging heat through the indoor heat exchanger, and flows to the outdoor heat exchanger through the gas-liquid separator, and at this time, if it is detected that the return air pressure is greater than the saturation pressure, which indicates the liquid impact risk of the second return air port, the opening degree of the second throttling device may be decreased and/or the opening degree of the first throttling device may be increased, so as to decrease the refrigerant flow from the gas-liquid separator to the second return air port, and reduce the liquid impact risk.
In the heating mode, if the return air temperature is detected to be lower than the saturation temperature, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
EXAMPLE III
As shown in fig. 7, the operation control method according to another embodiment of the present invention specifically includes: step 702, acquiring return air temperature and return air pressure at a second return air port; step 704, calculating a corresponding saturation temperature according to the return air pressure; in step 706, if the return air temperature is detected to be lower than the saturation temperature, the operation frequency of the compressor is controlled to be reduced.
Example four
As shown in fig. 8, the operation control method according to another embodiment of the present invention specifically includes: step 802, acquiring a return air temperature and a return air pressure at a second return air port; step 804, calculating a corresponding saturation temperature according to the return air pressure; step 806, in the cooling mode, if the return air temperature is detected to be lower than the saturation temperature, controlling to reduce the opening degree of the first throttling device and/or controlling to increase the opening degree of the second throttling device; and 808, in the heating mode, if the return air temperature is detected to be lower than the saturation temperature, controlling to increase the opening degree of the first throttling device and/or controlling to decrease the opening degree of the second throttling device.
The saturation temperature refers to the temperature of the liquid refrigerant and the gaseous refrigerant in the dynamic balance device, namely, in the saturation state, the temperature between the liquid refrigerant and the gaseous refrigerant is equal, and if the return air temperature is lower than the saturation temperature, the liquid refrigerant flowing from the gas-liquid separator to the second return air port is excessive, so that the liquid impact risk is caused.
In any one of the above technical solutions, optionally, generating an adjustment parameter of the air conditioner system according to a comparison result between the operating condition parameter and the saturation threshold includes: and if the return air temperature is detected to be lower than the saturation temperature, controlling to reduce the running frequency of the compressor.
In the technical scheme, if the return air temperature is lower than the saturation temperature, the liquid refrigerant flowing from the gas-liquid separator to the second return air port is excessive to cause liquid impact risk, and at the moment, the flow rate of the refrigerant between the gas-liquid separator and the second return air port is reduced by reducing the operating frequency of the compressor, so that the purpose of reducing the liquid impact risk is achieved.
In any one of the above technical solutions, optionally, generating an adjustment parameter of the air conditioner system according to a comparison result between the operating condition parameter and the saturation threshold includes: in the cooling mode, if the return air temperature is detected to be lower than the saturation temperature, controlling to reduce the opening degree of the first throttling device and/or controlling to increase the opening degree of the second throttling device; in the heating mode, if the return air temperature is detected to be lower than the saturation temperature, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
In the technical scheme, the first throttling device is used for adjusting the flow of the refrigerant between the gas-liquid separator and the outdoor heat exchanger, the second throttling device is used for adjusting the flow of the refrigerant between the indoor heat exchanger and the gas-liquid separator, in a refrigeration mode, the high-temperature and high-pressure refrigerant flows to the gas-liquid separator after being subjected to heat exchange through the outdoor heat exchanger and flows to the indoor heat exchanger through the gas-liquid separator, and at the moment, if the liquid impact risk of the second air return port is detected, the opening degree of the second throttling device can be increased and/or the opening degree of the first throttling device can be reduced, so that the flow of the refrigerant from the gas-liquid separator to the second air return port is reduced, and the.
In the heating mode, high-temperature and high-pressure refrigerant flows to the gas-liquid separator after exchanging heat through the indoor heat exchanger, and flows to the outdoor heat exchanger through the gas-liquid separator, and at the moment, if the liquid impact risk of the second air return port is detected, the opening degree of the second throttling device can be reduced and/or the opening degree of the first throttling device can be increased, so that the refrigerant flow from the gas-liquid separator to the second air return port is reduced, and the liquid impact risk is reduced.
In any one of the above technical solutions, optionally, detecting a working condition parameter of the second return air inlet, and determining a corresponding saturation threshold according to the working condition parameter specifically includes: and responding to a starting instruction of the air conditioner, and collecting working condition parameters to determine corresponding saturation threshold values according to the working condition parameters.
In the technical scheme, the detection of the working condition parameters of the second exhaust port can be triggered based on the starting instruction of the air conditioner so as to reduce the liquid impact risk when the air conditioner is started.
In any one of the above technical solutions, optionally, detecting a working condition parameter of the second return air inlet, and determining a corresponding saturation threshold according to the working condition parameter specifically includes: the air conditioner is in an operating state, and working condition parameters are collected according to a preset collection frequency so as to determine corresponding saturation threshold values according to the working condition parameters.
In the technical scheme, in the operation process of the air conditioner, the working condition parameters of the second exhaust port can be acquired according to the preset acquisition frequency, so that whether the operation state is unstable or not is detected based on the relation between the working condition parameters and the corresponding saturation temperature or saturation pressure, and the liquid impact risk in the operation process of the air conditioner is reduced.
As shown in fig. 9, an operation control device 90 according to an embodiment of the present invention includes: a memory 902 and a processor 904; a memory 902 for storing program code; and a processor 904 for calling the program code to execute the operation control method of any of the above embodiments.
A computer-readable storage medium according to an embodiment of the invention, has stored thereon a computer program which, when executed, carries out the steps of the operation control method as defined in any one of the embodiments above.
The technical scheme of the invention is described in detail by combining the attached drawings, by acquiring the working condition parameters of the second return air port, calculating the corresponding saturation threshold based on the working condition parameters, comparing the working condition parameters with the saturation threshold, and determining whether to adjust the current operation parameters according to the comparison result, when the liquid impact risk is detected, the liquid impact risk to the compressor is reduced by reducing the refrigerant flow between the gas-liquid separator and the second return air port, so that the stability and the safety of the operation of the air conditioner system are improved
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined in the appended claims and their equivalents, and it is intended that the invention encompass such changes and modifications as well.
Claims (10)
1. An operation control method is suitable for an air conditioner, the air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a reversing assembly, a gas-liquid separator is arranged on a flow path between the indoor heat exchanger and the outdoor heat exchanger, the compressor comprises a first air cylinder and a second air cylinder, a first air return port is arranged on the first air cylinder, the first air return port is connected with the reversing assembly, a second air return port is arranged on the second air cylinder, and the second air return port is connected with the gas-liquid separator, and the operation control method comprises the following steps:
detecting working condition parameters of the second air return port, and determining a corresponding saturation threshold value according to the working condition parameters;
generating an adjusting parameter of the air conditioner system according to a comparison result between the working condition parameter and the saturation threshold, wherein the adjusting parameter is used for adjusting the refrigerant flow between the gas-liquid separator and the second return air port;
the operating mode parameter of second return-air inlet is detected to according to operating mode parameter confirms corresponding saturation threshold, specifically includes:
acquiring the return air temperature and the return air pressure at the second return air port;
calculating corresponding saturation pressure according to the return air temperature, determining the saturation pressure as the saturation threshold value, and generating the adjusting parameter according to the comparison result between the return air pressure and the saturation pressure; or
And calculating corresponding saturation temperature according to the return air pressure, determining the saturation temperature as the saturation threshold value, and generating the adjusting parameter according to the comparison result between the return air temperature and the saturation temperature.
2. The operation control method according to claim 1, wherein the generating of the adjustment parameter of the air conditioner system according to the comparison result between the operating condition parameter and the saturation threshold includes:
and if the return air pressure is detected to be larger than the saturation pressure, controlling to reduce the operating frequency of the compressor.
3. The operation control method according to claim 1, wherein a first throttling device, the gas-liquid separator and a second throttling device are sequentially arranged between the outdoor heat exchanger and the indoor heat exchanger, and the generating of the adjustment parameter of the air conditioner system according to the comparison result between the operating condition parameter and the saturation threshold specifically comprises:
in a cooling mode, if the return air pressure is detected to be larger than the saturation pressure, controlling to reduce the opening degree of the first throttling device and/or controlling to increase the opening degree of the second throttling device;
in the heating mode, if the return air pressure is detected to be larger than the saturation pressure, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
4. The operation control method according to claim 1, wherein the generating of the adjustment parameter of the air conditioner system according to the comparison result between the operating condition parameter and the saturation threshold includes:
and if the return air temperature is detected to be lower than the saturation temperature, controlling to reduce the running frequency of the compressor.
5. The operation control method according to claim 1, wherein a first throttling device, the gas-liquid separator and a second throttling device are sequentially arranged between the outdoor heat exchanger and the indoor heat exchanger, and the generating of the adjustment parameter of the air conditioner system according to the comparison result between the operating condition parameter and the saturation threshold specifically comprises:
in a cooling mode, if the return air temperature is detected to be lower than the saturation temperature, controlling to reduce the opening degree of the first throttling device and/or controlling to increase the opening degree of the second throttling device;
in the heating mode, if the return air temperature is detected to be lower than the saturation temperature, the opening degree of the first throttling device is controlled to be increased, and/or the opening degree of the second throttling device is controlled to be decreased.
6. The operation control method according to any one of claims 1 to 5, wherein the detecting a condition parameter of the secondary return air port and determining the corresponding saturation threshold according to the condition parameter specifically includes:
and responding to a starting instruction of the air conditioner, collecting the working condition parameters, and determining corresponding saturation threshold values according to the working condition parameters.
7. The operation control method according to any one of claims 1 to 5, wherein the detecting a condition parameter of the secondary return air port and determining the corresponding saturation threshold according to the condition parameter specifically includes:
and the air conditioner is in an operating state, and the working condition parameters are collected according to a preset collection frequency so as to determine corresponding saturation thresholds according to the working condition parameters.
8. An operation control device characterized by comprising: a memory and a processor;
the memory for storing program code;
the processor is used for calling the program codes to execute the operation control method according to any one of claims 1 to 7.
9. An air conditioner, comprising:
the operation control device according to claim 8.
10. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the operation control method according to any one of claims 1 to 7.
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| CN105371548B (en) * | 2015-12-11 | 2017-11-21 | 珠海格力电器股份有限公司 | Gas-supplying enthalpy-increasing control method, equipment and the device of double-stage compressor |
| CN105783197A (en) * | 2016-04-20 | 2016-07-20 | 广东美芝制冷设备有限公司 | Control method for air conditioner |
| WO2017185513A1 (en) * | 2016-04-29 | 2017-11-02 | 广东美的制冷设备有限公司 | Cooling-heating type air conditioner, cooling-only type air conditioner, control method for air conditioner |
| CN109442637A (en) * | 2018-11-19 | 2019-03-08 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of Gas-supplying enthalpy-increasing system and its control method |
| CN109341123B (en) * | 2018-12-07 | 2023-07-14 | 珠海格力电器股份有限公司 | Control method of air conditioning system |
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