CN107588573B - Air conditioner, compressor protection method, computer device, and readable storage medium - Google Patents
Air conditioner, compressor protection method, computer device, and readable storage medium Download PDFInfo
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- CN107588573B CN107588573B CN201710785374.2A CN201710785374A CN107588573B CN 107588573 B CN107588573 B CN 107588573B CN 201710785374 A CN201710785374 A CN 201710785374A CN 107588573 B CN107588573 B CN 107588573B
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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
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Abstract
The invention provides an air conditioner, a compressor protection method, computer equipment and a computer readable storage medium, wherein the air conditioner comprises: the compressor, the first heat exchanger that links to each other through the gas vent of first pipeline and compressor, the second heat exchanger that links to each other through the return air inlet of second pipeline and compressor and locate the first throttling arrangement between first heat exchanger and the second heat exchanger, still include: one end of the third pipeline is connected with the air return port, and the other end of the third pipeline is connected to the second pipeline; and the bypass valve is arranged on the third pipeline and conducts the third pipeline when the compression ratio of the compressor is not less than a preset threshold value. By the technical scheme of the invention, the shutdown frequency of the compressor is reduced, and the stable output of the air conditioner is facilitated.
Description
Technical Field
The present invention relates to the field of air conditioners, and in particular, to an air conditioner, a compressor protection method, a computer device, and a computer-readable storage medium.
Background
The compressor is used as a core component of an air conditioner refrigerating system, the stable operation of the compressor is the guarantee of the function of the air conditioner, when the air conditioner is in low-temperature heating operation, the compression ratio of the compressor is overlarge, the exhaust pressure is increased, the exhaust temperature exceeds the allowable range of the compressor, and lubricating oil and a refrigerant can be carbonized and decomposed at the moment to influence the stable operation of the compressor and a unit.
At present, the protection of the air conditioner compressor is generally realized by detecting the exhaust temperature value of the compressor according to a compressor operation range diagram provided by a manufacturer, when the exhaust temperature value exceeds an operation range, the compressor is stopped, but under certain working conditions, the compressor is frequently started and stopped, so that the stable output of the air conditioner unit is influenced, and the service life of the compressor is also influenced.
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, an object of the present invention is to propose an air conditioner.
It is a further object of the present invention to provide a compressor protection method.
It is a further object of the invention to propose a computer device.
It is yet another object of the present invention to provide a computer-readable storage medium.
In view of this, the technical solution of the first aspect of the present invention provides an air conditioner, including: the compressor, the first heat exchanger that links to each other through the gas vent of first pipeline and compressor, the second heat exchanger that links to each other through the return air inlet of second pipeline and compressor and locate the first throttling arrangement between first heat exchanger and the second heat exchanger, still include: one end of the third pipeline is connected with the air return port, and the other end of the third pipeline is connected to the second pipeline; and the bypass valve is arranged on the third pipeline, and is communicated with the third pipeline when the compression ratio of the compressor is not less than a preset threshold value, wherein the exhaust port is provided with an exhaust pressure sensor and an exhaust temperature sensor, the return gas port is provided with a return gas pressure sensor, and the compression ratio is determined by an exhaust pressure value measured by the exhaust pressure sensor and a return gas pressure value measured by the return gas pressure sensor.
In the technical scheme, the air conditioner comprises a compressor, a first heat exchanger, a first throttling device, a second heat exchanger and a bypass valve, wherein the first heat exchanger is connected with an exhaust port of the compressor through a first pipeline, and the second heat exchanger is connected with an air return port of the compressor through a second pipeline and is connected with the first throttling device to form a closed loop.
When the air conditioner is in heating operation, the refrigerant is pressurized by the compressor to become high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the first heat exchanger through the four-way valve through the exhaust port of the compressor, is condensed, liquefied and released to become liquid, meanwhile, the indoor air is heated, the liquid is decompressed by the first throttling device and enters the second heat exchanger, the liquid is evaporated, gasified and absorbed to become gaseous, meanwhile, the heat of the outdoor air is absorbed, and the gaseous refrigerant enters the compressor again through the return air port of the compressor to start the next cycle process; the bypass valve is arranged on a third pipeline connecting the return air port and the second heat exchanger, and when the compression ratio of the compressor is not less than a preset threshold value, the bypass valve conducts the third pipeline to reduce the exhaust pressure of the exhaust port of the compressor so as to reduce the compression ratio of the compressor.
The exhaust port is provided with an exhaust pressure sensor for measuring the exhaust pressure value of the exhaust port of the compressor, the return gas port is provided with a return gas pressure sensor for measuring the return gas pressure value of the return gas port of the compressor, and the compression ratio is determined by the ratio of the measured exhaust pressure value and the measured return gas pressure value.
It should be noted that, when the compression ratio of the compressor is not less than the preset threshold, the bypass valve conducts the third pipeline, so that part of the high-temperature and high-pressure gas discharged from the exhaust port of the compressor can flow back to the return port of the compressor through the bypass valve, thereby reducing the gas amount of the high-temperature and high-pressure gas in the first heat exchanger, reducing the condensing pressure, reducing the exhaust pressure of the exhaust port of the compressor, and reducing the compression ratio of the compressor.
In addition, the first throttling device may be a device having a throttling function, such as a capillary tube or a thermostatic expansion valve.
In addition, it should be noted that the reason for the too high exhaust pressure is that the condensing pressure is too high, the heat dissipation area of the condenser is not enough, the cooling air volume or water volume is not enough, and the cooling water or air temperature is too high, which can cause the too high condensing pressure, and the exhaust pressure can be reduced by reducing the condensing pressure, and the reduction of the condensing pressure can be realized by increasing the heat dissipation area of the condenser, increasing the cooling air volume or water volume, and reducing the cooling water or air temperature.
In the above technical solution, preferably, the method further includes: and the gas-liquid separator is arranged on the second pipeline, and the other end of the third pipeline is connected between the gas-liquid separator and the second heat exchanger.
In the technical scheme, the gas-liquid separator is arranged on the second pipeline, and the other end of the third pipeline is connected between the gas-liquid separator and the second heat exchanger, so that when the air conditioner operates in heating, gas-liquid mixed refrigerant discharged from the second heat exchanger flows through the gas-liquid separator, the gas refrigerant subjected to gas-liquid separation enters the air return port of the compressor, and the next heating cycle process is performed.
In the above technical solution, preferably, the exhaust port is provided with an exhaust temperature sensor, and the air conditioner further includes: one end of the fourth pipeline is connected with the compressor, and the other end of the fourth pipeline is connected between the first heat exchanger and the first throttling device; the electromagnetic valve is arranged on the fourth pipeline, when the exhaust temperature detected by the exhaust temperature sensor is not less than the preset exhaust temperature and the bypass valve conducts the third pipeline, the electromagnetic valve conducts the fourth pipeline, and the second throttling device is connected with the electromagnetic valve in series on the fourth pipeline.
In the technical scheme, one end of a fourth pipeline is connected with a compressor, an electromagnetic valve connected between a first heat exchanger and a first throttling device is arranged on the fourth pipeline connecting the compressor and the first heat exchanger at the other end of the fourth pipeline, when a bypass valve is conducted for a certain time, the compression ratio of the compressor at the moment is detected, if the compression ratio of the compressor is not less than a preset threshold value and the exhaust temperature detected by an exhaust temperature sensor is not less than a preset exhaust temperature, the electromagnetic valve conducts the fourth pipeline to spray liquid and cool the compressor, the exhaust temperature of the compressor is reduced to enable the exhaust temperature to be reduced to the normal operation range of the compressor, wherein an exhaust port is provided with an exhaust pressure sensor and an exhaust temperature sensor which are used for measuring the exhaust pressure value and the exhaust temperature of an exhaust port of the compressor, and an air return port is provided with an air return pressure sensor which is, the compression ratio of the compressor is determined by an exhaust pressure value measured by an exhaust pressure sensor and a return pressure value measured by a return pressure sensor, the compression ratio of the compressor is the ratio of the exhaust pressure value to the return pressure value, and when the compression ratio of the compressor is overlarge, the exhaust pressure is overlarge or the return pressure is too small; the second throttling device arranged on the fourth pipeline can throttle high-temperature and high-pressure gas discharged from the exhaust port of the compressor, and reduce the operating pressure of the second heat exchanger so as to reduce the exhaust pressure and reduce the compression ratio.
Through the technical scheme, the compressor is protected by controlling the compression ratio of the compressor, the possibility that the compressor is stopped due to overlarge compression ratio and overhigh exhaust temperature is reduced, the stop times are reduced, and the stable output of the air conditioning unit is facilitated.
It should be noted that the preset threshold and the preset exhaust temperature are set within a range that can realize stable operation of the compressor, and when the compression ratio of the compressor exceeds the preset threshold or the exhaust temperature of the exhaust port exceeds the preset exhaust temperature, the lubricating oil and the refrigerant may be decomposed and carbonized, which affects the stable operation of the compressor system and the system.
The second throttling device may be a capillary tube, a thermostatic expansion valve, or other devices having a throttling function.
In the above technical scheme, preferably, when the first heat exchanger is a water-cooled heat exchanger, and when the compression ratio of the compressor is not less than a preset threshold value, the water outlet temperature of the water-cooled heat exchanger is reduced, a water inlet temperature sensor and a water outlet temperature sensor are respectively arranged at a water inlet and a water outlet of the water-cooled heat exchanger, and the water outlet temperature is measured by the water outlet temperature sensor.
In the technical scheme, if the first heat exchanger is a water-cooling heat exchanger, when the compression ratio of the compressor is not less than a preset threshold value, the temperature difference of the first heat exchanger is increased by reducing the water outlet temperature of the water-cooling heat exchanger, so that the heat conduction capacity of the first heat exchanger is increased, the first heat exchanger absorbs more heat, the evaporation temperature of a refrigerant is increased, the return air pressure is increased, the compression ratio of the compressor is reduced, the possibility that the compressor runs at an excessively high compression ratio is reduced, and the protection of the compressor is realized, wherein a water inlet temperature sensor and a water outlet temperature sensor are respectively arranged at a water inlet and a water outlet of the heat exchanger, so that the water inlet temperature and the water outlet temperature of the heat exchanger can be.
In the above technical solution, preferably, when the first heat exchanger is an air-cooled heat exchanger, the air-cooled heat exchanger includes a fan, and when a compression ratio of the compressor is not less than a preset threshold, the operating power of the fan is increased.
In the technical scheme, if the first heat exchanger is an air-cooled heat exchanger, when the compression ratio of the compressor is not less than a preset threshold value, the temperature difference of the first heat exchanger is increased by improving the operating power of the fan, so that the heat conduction capacity of the first heat exchanger is improved, the first heat exchanger absorbs more heat, the evaporation temperature of a refrigerant is improved, the return air pressure is increased, the compression ratio is further reduced, the possibility of the compressor operating at an excessively high compression ratio is reduced, and the protection of the compressor is realized.
The technical scheme of the second aspect of the invention provides a compressor protection method for an air conditioner, which comprises the following steps: determining a first compression ratio of a compressor after the air conditioner runs in a heating state for a first preset time; if the first compression ratio is not less than the preset threshold value, the heat exchange capacity of a first heat exchanger in the air conditioner is improved; determining a second compression ratio of the compressor after the air conditioner operates for a second time with the improved heat exchange capacity; if the second compression ratio is not less than the preset threshold value, the bypass valve is conducted; determining a third compression ratio and a discharge temperature of the compressor after the conducting time of the bypass valve reaches a third time; and when the third compression ratio is not less than the preset threshold value and the exhaust temperature is not less than the preset exhaust temperature, controlling the electromagnetic valve to be conducted to carry out liquid spraying cooling on the compressor.
In the technical scheme, the air conditioner runs in a heating state, and reaches a running stable state after running for a first preset time, and at the moment, a first compression ratio of the compressor is determined, so that whether the compression ratio exceeds a preset threshold value is conveniently judged; when the first compression ratio is smaller than a preset threshold value, the air conditioner continues to maintain the current running state, and when the first compression ratio is not smaller than the preset threshold value, the heat exchange capacity of the first heat exchanger in the air conditioner is improved, and the compression ratio is reduced to protect the compressor; after the air conditioner runs for the second time with the improved heat exchange capacity, determining a second compression ratio of the compressor, and conveniently continuously judging the size relation between the compression ratio and a preset threshold value; when the second compression ratio is smaller than a preset threshold value, the air conditioner continues to maintain the current running state, and when the second compression ratio is not smaller than the preset threshold value, the exhaust pressure of the exhaust port of the compressor is reduced by conducting the bypass valve so as to reduce the compression ratio; after the bypass valve is conducted for a third preset time, determining a third compression ratio and an exhaust temperature of the compressor, so as to conveniently judge whether the compression ratio exceeds a preset threshold value and whether the exhaust temperature exceeds a preset exhaust temperature set by the compressor; when the third compression ratio is smaller than the preset threshold value, the air conditioner continues to maintain the current running state, and when the third compression ratio is not smaller than the preset threshold value and the exhaust temperature is not smaller than the preset exhaust temperature, the electromagnetic valve is controlled to be conducted to spray liquid and cool the compressor, and the exhaust temperature of the exhaust port of the compressor is reduced, so that the exhaust pressure is reduced, the compression ratio is reduced, the protection of the compressor is realized, and the possibility of shutdown caused by overlarge compression ratio of the compressor is reduced.
Through the technical scheme, the compressor is protected by controlling the compression ratio of the compressor, the possibility that the compressor is stopped due to overlarge compression ratio and overhigh exhaust temperature is reduced, the stop times are reduced, and the stable output of the air conditioning unit is facilitated.
It should be noted that the first preset time is determined according to the time required for the air conditioner to reach the stable operation state when the air conditioner operates in the heating state, the second preset time is determined according to the time required for the first heat exchanger to improve the heat exchange capacity and the time required for the compressor to reduce the compression ratio, and the third preset time is determined according to the conduction speed of the bypass valve, the conduction amount of the bypass valve and the time required for the compressor to reduce the compression ratio.
In addition, it should be noted that the preset threshold and the preset exhaust temperature are set within a range that can realize stable operation of the compressor, and when the compression ratio of the compressor exceeds the preset threshold or the exhaust temperature of the exhaust port exceeds the preset exhaust temperature, the lubricating oil and the refrigerant may be decomposed and carbonized, which affects the stable operation of the compressor system and the system.
In the above technical solution, preferably, after the air conditioner operates in the heating state for a first preset time, determining the first compression ratio of the compressor specifically includes: after the air conditioner is heated for a first preset time, determining a first exhaust pressure value and a first return air pressure value of a compressor; determining a first compression ratio of the compressor according to the first exhaust pressure value and the first return pressure value; after the air conditioner operates for the second time with the improved heat exchange capacity, determining a second compression ratio of the compressor specifically includes: determining a second exhaust pressure value and a second return air pressure value of the compressor after the air conditioner operates for a second time with the improved heat exchange capacity; determining a second compression ratio of the compressor according to the second exhaust pressure value and the second return air pressure value; after the on-time of the bypass valve reaches the third time, determining a third compression ratio and an exhaust temperature of the compressor specifically comprises: determining a third exhaust pressure value and a third return pressure value of the compressor after the conducting time of the bypass valve reaches a third time; and determining a third compression ratio of the compressor according to the third exhaust pressure value and the third return air pressure value.
In the technical scheme, the compression ratio of the compressor is determined by the ratio of the exhaust pressure value and the return pressure value of the compressor, when the air conditioner runs in a heating state, the exhaust pressure value of the compressor is detected by an exhaust pressure sensor arranged at an exhaust port of the compressor, and the return pressure value of the compressor is detected by a return pressure sensor arranged at a return port of the compressor; when the first compression ratio is not less than the preset threshold value, the temperature difference at two sides of the first heat exchanger is increased by reducing the set water temperature of the first heat exchanger, so that the heat conduction capacity of the first heat exchanger is increased, the first heat exchanger absorbs more heat, the evaporation temperature of a refrigerant is increased, the return air pressure is increased, and the compression ratio of the compressor is reduced; when the air conditioner runs for a second time with the improved heat exchange capacity, determining a second exhaust pressure value and a second return air pressure value of the compressor, determining a second compression ratio of the compressor according to the second exhaust pressure value and the second return air pressure value, when the second compression ratio is smaller than a preset threshold value, continuously maintaining the current running state of the air conditioner, and when the second compression ratio is not smaller than the preset threshold value, reducing the exhaust pressure of an exhaust port of the compressor by conducting a bypass valve so as to reduce the compression ratio; when the bypass valve is conducted for a third preset time, a third exhaust pressure value and a third return air pressure value of the compressor are determined, a third compression ratio of the compressor is determined according to the third exhaust pressure value and the third return air pressure value, when the third compression ratio is smaller than a preset threshold value, the air conditioner continues to maintain the current running state, when the third compression ratio is larger than the preset threshold value, the size of the exhaust temperature and the preset exhaust temperature is judged through detection of the exhaust temperature, and the adjustment action of the air conditioner is determined by combining the size relation between the third compression ratio and the preset threshold value.
In the above technical solution, preferably, if the first compression ratio is not less than the preset threshold, the heat exchange capability of the first heat exchanger in the air conditioner is improved, which specifically includes: if the first heat exchanger is a water-cooling heat exchanger, controlling the water-cooling heat exchanger to reduce the outlet water temperature when the first compression ratio is not less than a preset threshold value; if the first heat exchanger is an air-cooled heat exchanger, the operating power of a fan of the air-cooled heat exchanger is increased when the first compression ratio is not less than a preset threshold value.
In the technical scheme, if the first heat exchanger is a water-cooling heat exchanger, when the first compression ratio of the compressor is not less than the preset threshold value, the temperature difference of the two heat exchange sides of the first heat exchanger is increased by reducing the water outlet temperature of the water-cooling heat exchanger, so that the heat conduction capacity of the water-cooling heat exchanger is increased, the first heat exchanger absorbs more heat, the evaporation temperature of a refrigerant is increased, the return air pressure is increased, the compression ratio of the compressor is reduced, the possibility of the compressor running at an excessively high compression ratio is reduced, and the protection of the compressor is realized.
Wherein, the water inlet and the water outlet of the heat exchanger are respectively provided with a water inlet temperature sensor and a water outlet temperature sensor so as to measure the water inlet temperature and the water outlet temperature of the heat exchanger.
In addition, if the first heat exchanger is an air-cooled heat exchanger, when the compression ratio of the compressor is not less than a preset threshold value, the operating power of a fan of the air-cooled heat exchanger is increased, and the temperature difference between two sides of the first heat exchanger is increased, so that the heat conduction capacity of the air-cooled heat exchanger is increased, the first heat exchanger absorbs more heat, the evaporation temperature of a refrigerant is increased, the return air pressure is increased, the compression ratio is further reduced, the possibility that the compressor operates at an excessively high compression ratio is reduced, and the protection of the compressor is realized.
In the above technical solution, preferably, the method further includes: and when the third compression ratio is not less than the preset threshold value and the exhaust temperature is less than the preset temperature, controlling the compressor to execute shutdown protection.
In the technical scheme, when the third compression ratio is larger than the preset threshold and the exhaust temperature is smaller than the preset exhaust temperature, the effect of reducing the compression ratio of the compressor cannot be achieved by reducing the exhaust temperature, at the moment, the compression ratio of the compressor exceeds the preset threshold, the compressor stops running, and the protection of the compressor is realized.
In the above technical solution, preferably, the method further includes: after the spray liquid cooling of the compressor is finished, determining a fourth compression ratio of the compressor; and when the fourth compression ratio is not less than the preset threshold value, controlling the compressor to execute shutdown protection.
In the technical scheme, after the spray cooling of the compressor is finished, the fourth compression ratio of the compressor is determined, and if the fourth compression ratio of the compressor is still not smaller than the preset threshold value, the spray cooling of the compressor cannot reduce the compression ratio of the compressor, and at the moment, the compressor stops operating, so that the compressor is protected.
The technical solution of the third aspect of the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to perform any one of the above-mentioned compressor protection methods.
In this technical solution, a computer program for executing any one of the above-mentioned compressor protection methods is stored in a memory, and when the processor executes the computer program, the any one of the above-mentioned compressor protection methods can be implemented.
An aspect of the fourth aspect of the present invention provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing any one of the above-described compressor protection methods.
In this embodiment, the processor needs to implement the above compressor protection method through a computer program, and such a computer program needs to be stored in a computer readable medium. The computer readable medium enables the computer program to be executed by the processor, so as to implement any of the above-mentioned compressor protection methods, and therefore, all the beneficial effects of the compressor protection method in any of the above-mentioned technical solutions are achieved, and are not described herein again.
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 illustrates a schematic configuration of an air conditioner according to still another embodiment of the present invention;
FIG. 3 shows a flow diagram of a compressor protection method according to an embodiment of the invention;
FIG. 4 shows a schematic structural diagram of a computer device according to an embodiment of the invention;
FIG. 5 illustrates a flow diagram of a compressor protection method according to yet another embodiment of the present invention;
FIG. 6 shows a flow diagram of a compressor protection method according to yet another embodiment of the present invention;
fig. 7 illustrates a control logic diagram of a compressor protection method according to still another 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 first embodiment is as follows:
fig. 1 illustrates a schematic configuration of an air conditioner 100 according to an embodiment of the present invention.
As shown in fig. 1, an air conditioner 100 according to an embodiment of the present invention includes: the compressor 102, the first heat exchanger 104 connected to the discharge port of the compressor through the first pipeline, the second heat exchanger 106 connected to the return port of the compressor through the second pipeline, and the first throttling device 108 disposed between the first heat exchanger and the second heat exchanger, further include: one end of the third pipeline is connected with the air return port, and the other end of the third pipeline is connected to the second pipeline; and a bypass valve 110 disposed on the third pipeline, wherein the bypass valve 110 conducts the third pipeline when a compression ratio of the compressor is not less than a preset threshold, wherein an exhaust pressure sensor 112 is disposed at an exhaust port, a return air pressure sensor 114 is disposed at a return air port, and the compression ratio is determined by an exhaust pressure value measured by the exhaust pressure sensor 112 and a return air pressure value measured by the return air pressure sensor 114.
In this embodiment, the air conditioner includes a compressor 102, a first heat exchanger 104, a second heat exchanger 106, a first throttling device 108, and a bypass valve 110, wherein the first heat exchanger 104 is connected to a discharge port of the compressor 102 through a first pipe, and the second heat exchanger 106 is connected to a return port of the compressor 102 through a second pipe and is connected to the first throttling device 108 to form a closed loop.
When the air conditioner 100 is in heating operation, namely, the port a of the four-way valve is communicated with the port b, the port c is communicated with the port d, the refrigerant is pressurized by the compressor 102 to become high-temperature high-pressure gas, the high-temperature high-pressure gas enters the first heat exchanger 104 through the four-way valve through the exhaust port of the compressor 102, is condensed, liquefied and released to become liquid, meanwhile, the indoor air is heated, the liquid is decompressed by the first throttling device 108, enters the second heat exchanger 106, is evaporated, gasified and absorbs heat to become gaseous, meanwhile, the heat of the outdoor air is absorbed, and the gaseous refrigerant enters the compressor 102 again through the return air port of the compressor 102 to; the bypass valve 110 is disposed on a third pipeline connecting the return air port and the second heat exchanger 106, and when the compression ratio of the compressor 102 is not less than a preset threshold value, the bypass valve 110 conducts the third pipeline to reduce the exhaust pressure at the exhaust port of the compressor 102, so as to reduce the compression ratio of the compressor 102.
The exhaust port is provided with an exhaust pressure sensor 112 for measuring the exhaust pressure value of the exhaust port of the compressor, the return port is provided with a return pressure sensor 114 for measuring the return pressure value of the return port of the compressor, and the compression ratio is determined by the ratio of the measured exhaust pressure value and the measured return pressure value.
It should be noted that, when the compression ratio of the compressor 102 is not less than the preset threshold, the bypass valve 110 conducts the third pipeline, so that part of the high-temperature high-pressure gas discharged from the discharge port of the compressor 102 can flow back to the return port of the compressor 102 through the bypass valve 110, thereby reducing the gas amount of the high-temperature high-pressure gas in the first heat exchanger 104, reducing the condensing pressure, and therefore reducing the discharge pressure of the discharge port of the compressor 102, and thus reducing the compression ratio of the compressor.
In addition, the first throttling device 108 may be a device having a throttling function, such as a capillary tube or a thermal expansion valve.
In addition, it should be noted that the reason for the too high exhaust pressure is that the condensing pressure is too high, the heat dissipation area of the condenser is not enough, the cooling air volume or water volume is not enough, and the cooling water or air temperature is too high, which can cause the too high condensing pressure, and the exhaust pressure can be reduced by reducing the condensing pressure, and the reduction of the condensing pressure can be realized by increasing the heat dissipation area of the condenser, increasing the cooling air volume or water volume, and reducing the cooling water or air temperature.
In the above embodiment, preferably, the method further includes: and the gas-liquid separator 116 is arranged on the second pipeline, and the other end of the third pipeline is connected between the gas-liquid separator 116 and the second heat exchanger 106.
In this embodiment, the gas-liquid separator 116 is disposed on the second pipeline, and the other end of the third pipeline is connected between the gas-liquid separator 116 and the second heat exchanger 106, so that when the air conditioner 100 is in heating operation, after the gas-liquid mixed refrigerant coming out of the second heat exchanger 106 flows through the gas-liquid separator, the gas-liquid separated gas refrigerant enters the return air port of the compressor 102, and the next heating cycle is performed.
Example two:
fig. 2 illustrates a schematic configuration of an air conditioner 100 according to an embodiment of the present invention.
As shown in fig. 2, according to a schematic structural diagram of the air conditioner 100 according to an embodiment of the present invention, the air outlet is provided with an exhaust temperature sensor 118, and the air conditioner 100 further includes: one end of the fourth pipeline is connected with the compressor 102, and the other end of the fourth pipeline is connected between the first heat exchanger and the first throttling device 108; the electromagnetic valve 120 is disposed on the fourth pipeline, when the exhaust temperature of the compressor 102 is not less than the preset exhaust temperature and the bypass valve 110 conducts the third pipeline, the electromagnetic valve 120 conducts the fourth pipeline, and the second throttling device 122 is connected in series with the electromagnetic valve 120 on the fourth pipeline.
In this embodiment, one end of the fourth pipeline is connected to the compressor 102, the electromagnetic valve 120 connected between the first heat exchanger 104 and the first throttling device 108 is disposed on the fourth pipeline connecting the compressor 102 and the first throttling device 104, after the bypass valve 110 is turned on for a certain time, the compression ratio of the compressor 102 at this time is detected, if the compression ratio of the compressor 102 is not less than the preset threshold value and the exhaust temperature detected by the exhaust temperature sensor 118 is not less than the preset exhaust temperature, the electromagnetic valve 120 turns on the fourth pipeline to spray liquid cooling the compressor 102 and reduce the exhaust temperature of the compressor 102 so as to reduce it to the normal operating range of the compressor, wherein the exhaust port is provided with the exhaust pressure sensor 112 and the exhaust temperature sensor 118 for measuring the exhaust pressure value and the exhaust temperature of the exhaust port of the compressor, and the return port is provided with the return pressure sensor 114, the device is used for measuring the return air pressure value of the return air port of the compressor, the compression ratio of the compressor 102 is determined by the exhaust pressure value measured by the exhaust pressure sensor 112 and the return air pressure value measured by the return air pressure sensor, the compression ratio of the compressor 102 is the ratio of the exhaust pressure value to the return air pressure value, and when the compression ratio of the compressor 102 is too large, the exhaust pressure is too large or the return air pressure is too small; the second throttling device 122 disposed on the fourth pipeline can throttle the high-temperature and high-pressure gas discharged from the exhaust port of the compressor 102, and reduce the operating pressure of the first heat exchanger 104, so as to reduce the exhaust pressure and reduce the compression ratio.
It should be noted that the preset threshold and the preset exhaust temperature are set within a range that can realize stable operation of the compressor 102, and when the compression ratio of the compressor 102 exceeds the preset threshold or the exhaust temperature of the exhaust port exceeds the preset exhaust temperature, the lubricating oil and the refrigerant may be decomposed and carbonized, which affects stable operation of the compressor system and the system.
The second throttle device 122 may be a capillary tube, a thermal expansion valve, or other devices having a throttling function.
In the above embodiment, preferably, when the first heat exchanger 104 is a water-cooled heat exchanger, and when the compression ratio of the compressor 102 is not less than a preset threshold, the outlet water temperature of the water-cooled heat exchanger is reduced, the inlet water temperature sensor 124 and the outlet water temperature sensor 126 are respectively disposed at the inlet and the outlet of the water-cooled heat exchanger, and the outlet water temperature is measured by the outlet water temperature sensor 126.
In this embodiment, if the first heat exchanger 104 is a water-cooled heat exchanger, when the compression ratio of the compressor 102 is not less than the preset threshold, the temperature difference of the first heat exchanger 104 is increased by reducing the water outlet temperature of the water-cooled heat exchanger, so as to increase the heat conduction capacity of the first heat exchanger, so that the first heat exchanger 104 absorbs more heat, increase the evaporation temperature of the refrigerant, increase the return air pressure, further reduce the compression ratio of the compressor 102, reduce the possibility that the compressor 102 operates at an excessively high compression ratio, and achieve protection for the compressor 102, wherein a water inlet and a water outlet of the heat exchanger are respectively provided with a water inlet temperature sensor 124 and a water outlet temperature sensor 126, so as to measure the water inlet temperature and the water outlet temperature of the heat exchanger.
In the above embodiment, preferably, when the first heat exchanger 104 is an air-cooled heat exchanger, the air-cooled heat exchanger includes a fan, and when the compression ratio of the compressor 102 is not less than the preset threshold, the operating power of the fan is increased.
In this embodiment, if the first heat exchanger 104 is an air-cooled heat exchanger, when the compression ratio of the compressor 102 is not less than the preset threshold, the operating power of the fan is increased to increase the temperature difference of the first heat exchanger 104, so as to increase the heat transfer capacity of the first heat exchanger, so that the first heat exchanger 104 absorbs more heat, increase the evaporation temperature of the refrigerant, increase the return air pressure, further reduce the compression ratio, reduce the possibility that the compressor 102 operates at an excessively high compression ratio, and implement protection on the compressor 102.
Example three:
fig. 3 shows a flow diagram of a compressor protection method according to an embodiment of the present invention.
As shown in fig. 3, a compressor protection method according to an embodiment of the present invention includes:
step S302, after the air conditioner is heated for a first preset time, determining a first exhaust pressure value and a first return air pressure value of a compressor;
step S304, determining a first compression ratio of the compressor according to the first exhaust pressure value and the first return pressure value;
step S306, if the first compression ratio is not smaller than a preset threshold value, the heat exchange capacity of a first heat exchanger in the air conditioner is improved;
step S308, after the air conditioner runs for a second time with the improved heat exchange capacity, determining a second exhaust pressure value and a second return air pressure value of the compressor;
step S310, determining a second compression ratio of the compressor according to a second exhaust pressure value and a second return air pressure value;
step S312, if the second compression ratio is not less than the preset threshold value, the bypass valve is conducted;
step S314, determining a third exhaust pressure value and a third return pressure value of the compressor after the conduction time of the bypass valve reaches a third time;
step S316, determining a third compression ratio of the compressor according to a third exhaust pressure value and a third return air pressure value;
and step S318, when the third compression ratio is not less than the preset threshold value and the exhaust temperature is not less than the preset exhaust temperature, controlling the electromagnetic valve to be conducted, and performing liquid spraying cooling on the compressor.
In this embodiment, after the first preset time for the air conditioner to operate reaches the steady state, the first exhaust pressure value and the first return air pressure value are determined through step S302, the first compression ratio of the compressor is determined according to the ratio of the first exhaust pressure value and the first return air pressure value through step S304, and when the first compression ratio is smaller than the preset threshold, the air conditioner continues to operate in the current state; when the first compression ratio is not less than the preset threshold value, the heat exchange capacity of the first heat exchanger in the air conditioner is improved through the step S306, and the compression ratio is reduced to protect the compressor; determining a second exhaust pressure value and a second return air pressure value of the compressor after the air conditioner operates for a second time with the improved heat exchange capacity through the step S308, determining a second compression ratio of the compressor according to the second exhaust pressure value and the second return air pressure value through the step S310, so as to continuously judge the size relation between the compression ratio and a preset threshold value, and when the second compression ratio is smaller than the preset threshold value, continuously maintaining the current operation state by the air conditioner; when the second compression ratio is not less than the preset threshold, conducting a bypass valve through step S312, and reducing the exhaust pressure at the exhaust port of the compressor to reduce the compression ratio; determining a third exhaust pressure value and a third return air pressure value of the compressor after the bypass valve is conducted for a third preset time through the step S314, determining a third compression ratio of the compressor according to the third exhaust pressure value and the third return air pressure value through the step S316, and when the third compression ratio is smaller than a preset threshold value, continuously maintaining the current running state of the air conditioner; when the third compression ratio is larger than a preset threshold value, the exhaust temperature and the preset exhaust temperature are judged through detection of the exhaust temperature, and the adjustment action of the air conditioner is determined by combining the magnitude relation of the third compression ratio and the preset threshold value; when the third compression ratio is not less than the preset threshold value and the exhaust temperature is not less than the preset exhaust temperature through the step S318, the electromagnetic valve is controlled to be turned on, the compressor is subjected to liquid spraying cooling, and the exhaust temperature of the exhaust port of the compressor is reduced, so that the exhaust pressure is reduced, the compression ratio is reduced, the protection for the compressor is realized, and the possibility of shutdown caused by the overlarge compression ratio of the compressor is reduced.
It should be noted that, the compression ratio of the compressor is determined by the ratio of the discharge pressure value and the return pressure value of the compressor, when the air conditioner operates in a heating state, the discharge pressure value and the return pressure value of the compressor are detected by a discharge pressure sensor arranged at the discharge port of the compressor and a return pressure sensor arranged at the return port of the compressor, the outlet water temperature of the heat exchange device is measured by a discharge water temperature sensor, and the discharge temperature is measured by a discharge temperature sensor.
In addition, when the compression ratio of the compressor is not less than the preset threshold, the bypass valve conducts the third pipeline, so that part of the high-temperature high-pressure gas discharged from the exhaust port of the compressor can flow back to the return port of the compressor through the bypass valve, thereby reducing the gas quantity of the high-temperature high-pressure gas in the first heat exchanger, reducing the condensation pressure, reducing the exhaust pressure of the exhaust port of the compressor, and reducing the compression ratio of the compressor.
In addition, it should be noted that the first preset time is determined according to the time required for the air conditioner to reach the stable operation state when operating in the heating state, the second preset time is determined according to the time required for the first heat exchanger to improve the heat exchange capacity and the time required for the compressor to reduce the compression ratio, and the third preset time is determined according to the conduction speed of the bypass valve, the conduction amount of the bypass valve and the time required for the compressor to reduce the compression ratio.
In addition, it should be noted that the preset threshold and the preset exhaust temperature are set within a range that can achieve stable operation of the compressor, and when the compression ratio of the compressor exceeds the preset threshold or the exhaust temperature of the exhaust port exceeds the preset exhaust temperature, the lubricating oil and the refrigerant may decompose and carbonize, which affects stable operation of the compressor system and the system.
In the foregoing embodiment, preferably, step S306 specifically includes: if the first heat exchanger is a water-cooling heat exchanger, controlling the water-cooling heat exchanger to reduce the outlet water temperature when the first compression ratio is not less than a preset threshold value; if the first heat exchanger is an air-cooled heat exchanger, the operating power of a fan of the air-cooled heat exchanger is increased when the first compression ratio is not less than a preset threshold value.
In this embodiment, if the first heat exchanger is a water-cooled heat exchanger, when the first compression ratio of the compressor is not less than the preset threshold value, the temperature difference between the two sides of the first heat exchanger is increased by reducing the water outlet temperature of the water-cooled heat exchanger, so as to increase the heat conduction capacity of the first heat exchanger, so that the first heat exchanger absorbs more heat, the evaporation temperature of the refrigerant is increased, the return air pressure is increased, the compression ratio of the compressor is further reduced, the possibility that the compressor operates at an excessively high compression ratio is reduced, and the protection of the compressor is realized, wherein a water inlet temperature sensor and a water outlet temperature sensor are respectively arranged at a water inlet and a water outlet of the heat exchanger, so as to measure the water inlet temperature and the water.
In addition, if the first heat exchanger is a water-cooling heat exchanger, the temperature difference of the first heat exchanger can be increased by improving the operating power of the fan, so that the heat conduction capacity of the first heat exchanger is increased, the first heat exchanger absorbs more heat, the evaporation temperature of a refrigerant is improved, the return air pressure is increased, the compression ratio is reduced, the possibility that the compressor operates at an excessively high compression ratio is reduced, and the protection of the compressor is realized.
FIG. 4 is a schematic diagram of a computer device according to an embodiment of the present invention
As shown in fig. 4, the computer device 40 includes a memory 42, a processor 44, and a computer program stored on the memory 42 and executable on the processor 44, and the processor 44 executes the computer program to perform any one of the above-mentioned compressor protection methods.
In this embodiment, a computer program for executing any one of the above-mentioned compressor protection methods is stored in the memory 42, and when the processor 44 executes the computer program, the any one of the above-mentioned compressor protection methods can be implemented.
Example four:
fig. 5 shows a flow diagram of a compressor protection method according to yet another embodiment of the present invention.
As shown in fig. 5, step S502, after the air conditioner operates in a heating state for a first preset time, determining a first compression ratio of the compressor;
step S504, if the first compression ratio is not less than a preset threshold value, the heat exchange capacity of a second heat exchange device in the air conditioner is improved;
step S506, after the air conditioner runs for a second time with the improved heat exchange capacity, determining a second compression ratio of the compressor;
step S508, if the second compression ratio is not smaller than the preset threshold value, the bypass valve is conducted;
step S510, after the conduction time of the bypass valve reaches a third time, determining a third compression ratio and a discharge temperature of the compressor;
and S512, controlling the compressor to execute shutdown protection when the third compression ratio is not less than the preset threshold value and the exhaust temperature is less than the preset temperature.
In this embodiment, when the third compression ratio is greater than the preset threshold and the discharge temperature is less than the preset discharge temperature, it is described that the effect of reducing the compression ratio of the compressor is not achieved by reducing the discharge temperature, at this time, the compression ratio of the compressor exceeds the preset threshold, the compressor stops operating, and the protection of the compressor is achieved.
Example five:
fig. 6 shows a flow diagram of a compressor protection method according to yet another embodiment of the present invention.
As shown in fig. 6, after the air conditioner operates in a heating state for a first preset time, determining a first compression ratio of the compressor at step S602;
step S604, if the first compression ratio is not less than a preset threshold value, the heat exchange capacity of a second heat exchange device in the air conditioner is improved;
step S606, after the air conditioner runs for a second time with the improved heat exchange capacity, determining a second compression ratio of the compressor;
step S608, if the second compression ratio is not smaller than a preset threshold value, the bypass valve is conducted;
step S610, after the conduction time of the bypass valve reaches a third time, determining a third compression ratio and a discharge temperature of the compressor;
step S612, when the third compression ratio is not less than the preset threshold value and the exhaust temperature is not less than the preset exhaust temperature, controlling the electromagnetic valve to be conducted, and performing liquid spraying cooling on the compressor;
step S614, after the liquid spraying cooling of the compressor is finished, determining a fourth compression ratio of the compressor;
and step S616, controlling the compressor to execute shutdown protection when the fourth compression ratio is not less than the preset threshold value.
In this embodiment, after the spray cooling of the compressor is finished, the fourth compression ratio of the compressor is determined, and if the fourth compression ratio of the compressor is still not less than the preset threshold, it is indicated that the compression ratio of the compressor cannot be reduced even if the spray cooling of the compressor is performed, and at this time, the compressor stops operating, thereby protecting the compressor.
Example six:
fig. 7 shows a logic control diagram of a compressor protection method according to still another embodiment of the present invention.
Referring to fig. 1, 2 and 7, when the air conditioner is operated to perform heating in a low temperature environment, after the air conditioner is stably operated, a discharge pressure value P of the compressor is detected by a discharge pressure sensorHDetecting the return pressure value P by a return pressure sensorLThrough PHValue sum PLValue, determining a first compression ratio of the compressor, wherein the compression ratio is given by the formula P ═ (P)H+P0)/(PL+P0) Is calculated to obtain, wherein, P0For compressor pressure compensation, P0P of compressors of different models, related to the size of compression chamber of the compressor0Are all different.
It should be noted that the preset threshold and the preset exhaust temperature are set within a range capable of realizing stable operation of the compressor, and when the compression ratio of the compressor exceeds the preset threshold or the exhaust temperature of the exhaust port exceeds the preset exhaust temperature, the lubricating oil and the refrigerant may be decomposed and carbonized, which affects the stable operation of the compressor system and the system; in this embodiment, the preset threshold is set to 8 and the preset exhaust temperature is set to Tspr.
When the first compression ratio of the compressor is less than a preset threshold, i.e. P<When 8 hours, the control unit operates normally and does not act, and when P is reached>When 8, the water outlet temperature of the water side heat exchanger is reduced by reducing the set water temperature, and the heat exchange capacity of the water side heat exchanger is improved, wherein the water outlet temperature is measured by a water outlet temperature sensor; after the air conditioner is operated for a period of time with the improved heat exchange capacity, passing through PHValue sum PLThe value determines the second compression ratio of the compressor when P<When 8 hours, the control unit operates normally and does not act, and when P is reached>When 8, the bypass valve is conducted, so that part of high-temperature and high-pressure gas discharged from the exhaust port of the compressor can flow back to the return air port of the compressor through the bypass valve, the gas quantity of the high-temperature and high-pressure gas in the first heat exchanger is reduced, the condensing pressure is reduced, the exhaust pressure is reduced, and the compression ratio is reduced; after the bypass valve is conducted for a third preset time, the bypass valve passes through PHValue sum PLThe value determines the third compression ratio of the compressor when P<When 8 hours, the control unit operates normally and does not act, and when P is reached>8 and the exhaust temperature is not less than the preset exhaust temperature (i.e. Tp)>Tspr), the electromagnetic valve is controlled to be conducted to spray liquid and cool the compressor, the exhaust temperature is reduced to reduce the exhaust pressure, so that the compression ratio is reduced, and P is>8 and the exhaust temperature is not less than the preset exhaust temperature (i.e. Tp)<Ttspr), the compressor performs shutdown protection; after the end of the liquid spraying cooling of the compressor, passing through PHValue sum PLThe value determines a fourth compression ratio of the compressor; when P is present<When 8 hours, the control unit normally operates, does not act, and is in P>And 8, controlling the compressor to execute shutdown protection.
The technical scheme of the invention is provided, and the invention realizes the protection of the compressor by controlling the compression ratio of the compressor, reduces the possibility of shutdown of the compressor due to overlarge compression ratio and overhigh exhaust temperature, reduces the shutdown times and is beneficial to the stable output of the air conditioning unit.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An air conditioner, comprising: the compressor, through first pipeline with the first heat exchanger that the gas vent of compressor links to each other, through the second pipeline with the second heat exchanger that the return air inlet of compressor links to each other and locating first heat exchanger with first throttling arrangement between the second heat exchanger, its characterized in that still includes:
one end of the third pipeline is connected with the air return port, and the other end of the third pipeline is connected to the second pipeline;
a bypass valve provided on the third pipeline, the bypass valve conducting the third pipeline when a compression ratio of the compressor is not less than a preset threshold value,
the compression ratio is determined by the exhaust pressure value measured by the exhaust pressure sensor and the return pressure value measured by the return pressure sensor;
the gas vent is equipped with exhaust temperature sensor, the air conditioner still includes:
one end of the fourth pipeline is connected with the compressor, and the other end of the fourth pipeline is connected between the first heat exchanger and the first throttling device;
the electromagnetic valve is arranged on the fourth pipeline, and when the exhaust temperature detected by the exhaust temperature sensor is not less than the preset exhaust temperature and the bypass valve conducts the third pipeline, the electromagnetic valve conducts the fourth pipeline;
and the second throttling device is connected with the electromagnetic valve in series on the fourth pipeline.
2. The air conditioner according to claim 1, further comprising:
and the gas-liquid separator is arranged on the second pipeline, and the other end of the third pipeline is connected between the gas-liquid separator and the second heat exchanger.
3. The air conditioner according to claim 1,
when the first heat exchanger is a water-cooling heat exchanger, the compression ratio of the compressor is not smaller than the preset threshold value, the water outlet temperature of the water-cooling heat exchanger is reduced, a water inlet and a water outlet of the water-cooling heat exchanger are respectively provided with a water inlet temperature sensor and a water outlet temperature sensor, and the water outlet temperature is measured by the water outlet temperature sensor.
4. The air conditioner according to claim 1,
when the first heat exchanger is an air-cooled heat exchanger, the air-cooled heat exchanger comprises a fan, and when the compression ratio of the compressor is not less than the preset threshold value, the running power of the fan is improved.
5. A compressor protection method for the air conditioner of any one of claims 1 to 4, characterized by comprising:
determining a first compression ratio of a compressor after the air conditioner runs in a heating state for a first preset time;
if the first compression ratio is not smaller than a preset threshold value, the heat exchange capacity of a first heat exchanger in the air conditioner is improved;
determining a second compression ratio of the compressor after the air conditioner operates for a second time with the improved heat exchange capacity;
if the second compression ratio is not smaller than the preset threshold value, the bypass valve is conducted;
determining a third compression ratio and an exhaust temperature of the compressor after the on-time of the bypass valve reaches a third time;
and when the third compression ratio is not less than the preset threshold value and the exhaust temperature is not less than the preset exhaust temperature, controlling the electromagnetic valve to be conducted to carry out liquid spraying cooling on the compressor.
6. The method for protecting a compressor of claim 5, wherein the determining the first compression ratio of the compressor after the air conditioner operates in a heating state for the first preset time specifically comprises:
after the air conditioner is heated for a first preset time, determining a first exhaust pressure value and a first return air pressure value of the compressor;
determining the first compression ratio of the compressor according to the first exhaust pressure value and the first return air pressure value;
after the air conditioner operates for the second time with the improved heat exchange capacity, determining the second compression ratio of the compressor specifically includes:
determining a second discharge pressure value and a second return air pressure value of the compressor after the air conditioner operates for a second time with the improved heat exchange capacity;
determining the second compression ratio of the compressor according to the second exhaust pressure value and the second return air pressure value;
the determining a third compression ratio and an exhaust temperature of the compressor after the on-time of the bypass valve reaches a third time may specifically include:
determining a third exhaust pressure value and a third return pressure value of the compressor after the conduction time of the bypass valve reaches a third time;
and determining the third compression ratio of the compressor according to the third exhaust pressure value and the third return air pressure value.
7. The method for protecting a compressor according to claim 5 or 6, wherein if the first compression ratio is not less than a preset threshold, the method for improving the heat exchange capacity of a first heat exchanger in the air conditioner specifically comprises:
if the first heat exchanger is a water-cooling heat exchanger, controlling the water-cooling heat exchanger to reduce the outlet water temperature when the first compression ratio is not less than the preset threshold value;
if the first heat exchanger is an air-cooled heat exchanger, the operating power of a fan of the air-cooled heat exchanger is increased when the first compression ratio is not less than the preset threshold value.
8. The compressor protection method according to claim 5 or 6, further comprising:
and when the third compression ratio is not less than the preset threshold value and the exhaust temperature is less than the preset temperature, controlling the compressor to execute shutdown protection.
9. The compressor protection method according to claim 5 or 6, further comprising:
after the spray liquid cooling of the compressor is finished, determining a fourth compression ratio of the compressor;
and when the fourth compression ratio is not less than the preset threshold value, controlling the compressor to execute shutdown protection.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the computer program, performs the compressor protection method according to any one of claims 5 to 9.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a compressor protection method according to any one of claims 5 to 9.
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| CN108873747B (en) * | 2018-06-20 | 2020-10-27 | 安徽安凯汽车股份有限公司 | Double inflation signal control method for new energy passenger car |
| CN112728821B (en) * | 2019-10-14 | 2022-07-08 | 广东芬尼克兹节能设备有限公司 | Compressor ultralow-temperature safe operation control method, device, equipment and storage medium |
| CN111595000B (en) * | 2020-05-18 | 2022-03-29 | 广东美的暖通设备有限公司 | Air conditioning system, control method and device of hydraulic module of air conditioning system and storage medium |
| CN112432340B (en) * | 2020-11-26 | 2021-11-26 | 珠海格力电器股份有限公司 | Control method and control device of air conditioner, processor and air conditioning system |
| CN114216255B (en) * | 2021-12-02 | 2023-10-20 | 青岛海尔空调器有限总公司 | Control method and device for air conditioner pressure relief and air conditioner |
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