CN110617603A - Air conditioner, control method of air conditioner, and computer-readable storage medium - Google Patents

Air conditioner, control method of air conditioner, and computer-readable storage medium Download PDF

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Publication number
CN110617603A
CN110617603A CN201910930988.4A CN201910930988A CN110617603A CN 110617603 A CN110617603 A CN 110617603A CN 201910930988 A CN201910930988 A CN 201910930988A CN 110617603 A CN110617603 A CN 110617603A
Authority
CN
China
Prior art keywords
air conditioner
fan
heat exchanger
controlling
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910930988.4A
Other languages
Chinese (zh)
Inventor
李宏伟
许永锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, GD Midea Heating and Ventilating Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201910930988.4A priority Critical patent/CN110617603A/en
Publication of CN110617603A publication Critical patent/CN110617603A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves

Abstract

The invention provides an air conditioner, a control method of the air conditioner and a computer readable storage medium, wherein the air conditioner comprises an outdoor unit, the outdoor unit comprises a fan and a heat exchanger, and the air conditioner further comprises: a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor when executing the computer program implementing: controlling the fan to rotate along a first direction; judging whether the heat exchanger is frosted or not according to the operation parameters of the air conditioner; and determining frosting of the heat exchanger, and controlling the fan to rotate in the direction opposite to the first direction. According to the air conditioner provided by the invention, whether the heat exchanger frosts or not is judged according to the running parameters of the air conditioner, and when the frosting of the heat exchanger is judged, the fan is controlled to rotate reversely to defrost the heat exchanger through convective heat transfer, so that the influence on the use comfort level of a user due to large indoor temperature change is avoided.

Description

Air conditioner, control method of air conditioner, and computer-readable storage medium
Technical Field
The invention relates to the technical field of household appliances, in particular to an air conditioner, a control method of the air conditioner and a computer readable storage medium.
Background
At present, in the heating operation process of an air conditioner in winter, the surface of a heat exchanger of an outdoor unit is easy to frost, and the frosting can influence the heating performance of the air conditioner. In the related art, defrosting is usually performed in a four-way valve reversing operation cooling mode, but in the heating process, if defrosting is frequently performed through four-way valve reversing, the indoor temperature is greatly reduced, and the comfort level of a user is reduced.
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, a first aspect of the present invention provides an air conditioner.
The second aspect of the invention also provides a control method of the air conditioner.
A third aspect of the invention also provides a computer-readable storage medium.
In view of the above, a first aspect of the present invention provides an air conditioner, which includes an outdoor unit, the outdoor unit including a fan and a heat exchanger, and further including: a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor when executing the computer program implementing: controlling the fan to rotate along a first direction; judging whether the heat exchanger is frosted or not according to the operation parameters of the air conditioner; and determining frosting of the heat exchanger, and controlling the fan to rotate in the direction opposite to the first direction.
The air conditioner provided by the invention judges whether the heat exchanger frosts according to the running parameters of the air conditioner, controls the fan to reversely rotate to defrost the heat exchanger through convection heat exchange when judging that the heat exchanger frosts, and does not need to switch the flow direction of a refrigerant through switching the four-way valve of the air conditioner to refrigerate the air conditioner to defrost when judging that the heat exchanger frosts.
According to the air conditioner provided by the invention, the air conditioner can also have the following additional technical characteristics:
in the above technical solution, further, when the processor executes the computer program, the step of determining whether the heat exchanger frosts according to the operation parameters of the air conditioner is realized, specifically: acquiring a current value when the fan rotates at a first rotating speed; and determining that the heat exchanger frosts on the basis that the current value is greater than or equal to the current threshold and the duration reaches the duration threshold.
In the technical scheme, when the frosting of the heat exchanger is judged, the frosting of the heat exchanger can be judged according to the change situation of the current value of the fan, specifically, when the fan rotates along the first direction, the current value of the fan is obtained, the current value of the fan is compared with the current threshold, when the current value is larger than or equal to the current threshold and the duration time reaches the duration threshold, the current of the fan is gradually increased under the same rotating speed, the energy consumption is gradually increased, and then the frosting of the heat exchanger is determined.
In any of the above technical solutions, further, when the processor executes the computer program, the step of determining whether the heat exchanger frosts according to the operation parameters of the air conditioner is implemented specifically as follows: acquiring the temperature of a coil of a heat exchanger and a first drop value corresponding to the temperature within a first time period; and determining that the heat exchanger frosts on the basis of the condition that the first drop value is greater than or equal to the temperature threshold value.
In the technical scheme, when the frosting of the heat exchanger is judged, the judgment can be carried out according to the change condition of the temperature of the coil pipe on the heat exchanger, specifically, the temperature of the coil pipe is obtained, the reduction rate of the temperature of the coil pipe is calculated, specifically, a first reduction value corresponding to the temperature in a first time length is obtained, and if the first reduction value is larger than or equal to a temperature threshold value, the temperature of the coil pipe is reduced too fast in the first time length, so that the frosting of the heat exchanger can be determined.
In any of the above technical solutions, further, when the processor executes the computer program, the step of determining whether the heat exchanger frosts according to the operation parameters of the air conditioner is implemented specifically as follows: acquiring a return air pressure value of the air conditioner and a corresponding second drop value of the pressure value in a second time period; and determining that the heat exchanger frosts on the basis of the condition that the second reduction value is greater than or equal to the pressure threshold value.
In the technical scheme, when the frosting of the heat exchanger is judged, the frosting of the heat exchanger can be judged according to the change situation of the return air pressure value of the air conditioner, specifically, in the operation process of the air conditioner, a compressor of the air conditioner continuously compresses a refrigerant, the refrigerant returns to the compressor from an air suction end after circulating in a refrigeration or heating loop, the return air pressure value of the air conditioner is also the return air pressure value of the return air end of the compressor, and under the condition that a second reduction value of the return air pressure value in a second duration is greater than a pressure threshold value, the pressure of the return air end of the compressor is insufficient, namely, the heat exchange capacity of the heat exchanger is reduced rapidly in the circulation process of the refrigerant, so that the frosting of the heat exchanger.
In any of the above technical solutions, further, when the processor executes the computer program, the step of controlling the fan to rotate in the direction opposite to the first direction is implemented specifically as follows: controlling the fan to rotate in a direction opposite to the first direction at a second rotating speed and acquiring the rotating duration of the fan; and controlling the fan to rotate along the first direction based on the condition that the rotating time of the fan reaches the third time.
In the technical scheme, after the frosting of the heat exchanger is judged, the fan is controlled to rotate in the direction opposite to the first direction, namely, the fan is controlled to rotate reversely, so that the heat exchanger is defrosted through convection heat exchange, specifically, in the process of controlling the fan to rotate reversely, the fan is rotated for the third time, when the reverse time of the fan reaches the third time, the fan can be understood as generating a better defrosting effect on the heat exchanger, so that the fan can rotate in the normal direction, namely, the fan is controlled to continue to rotate in the first direction.
In any of the above technical solutions, further, when the processor executes the computer program, the method further includes: acquiring the reverse rotation times of the fan; and controlling the air conditioner to refrigerate to defrost the heat exchanger based on the condition that the reverse rotation times are larger than or equal to the rotation times threshold value.
In the technical scheme, in the operation process of the air conditioner, the frosting condition can also appear in a period of time after the defrosting is carried out through the fan in a reverse mode, and then the fan is required to be driven to rotate for defrosting again, wherein in the operation process of the air conditioner, the reverse rotation frequency of the fan is recorded, when the reverse rotation frequency of the fan is larger than or equal to the threshold value of the rotation frequency, namely the fan is driven to rotate for multiple times for defrosting in the operation period of the air conditioner, the defrosting capacity is insufficient when the fan rotates for multiple times for defrosting possibly, and the air conditioner can be controlled to operate in a refrigeration mode to defrost the heat exchanger at the moment.
In any of the above technical solutions, further, after the step of controlling the air conditioner to defrost is implemented when the processor executes the computer program, the following is also implemented: the number of inversions is cleared.
According to the technical scheme, after the air conditioner is controlled to defrost, the reversing times are cleared, namely the reversing times are cleared, so that whether the air conditioner enters a conventional defrosting mode is determined again according to the reversing times.
According to the second aspect of the present invention, there is also provided a control method of an air conditioner, the air conditioner including an outdoor unit including a fan and a heat exchanger, the control method including: controlling the fan to rotate along a first direction; judging whether the heat exchanger is frosted or not according to the operation parameters of the air conditioner; and determining frosting of the heat exchanger, and controlling the fan to rotate in the direction opposite to the first direction.
The control method of the air conditioner provided by the invention judges whether the heat exchanger frosts according to the running parameters of the air conditioner, controls the fan to reversely rotate to defrost the heat exchanger through convection heat exchange when judging that the heat exchanger frosts, and does not need to switch the flow direction of the refrigerant through switching the four-way valve of the air conditioner to refrigerate the air conditioner to defrost when judging that the heat exchanger frosts.
According to the control method of the air conditioner provided by the invention, the following additional technical characteristics can be provided:
in the above technical solution, further, the step of determining whether the heat exchanger frosts according to the operation parameters of the air conditioner specifically includes: acquiring a current value when the fan rotates at a first rotating speed; and determining that the heat exchanger frosts on the basis that the current value is greater than or equal to the current threshold and the duration reaches the duration threshold.
In the technical scheme, when the frosting of the heat exchanger is judged, the frosting of the heat exchanger can be judged according to the change situation of the current value of the fan, specifically, when the fan rotates along the first direction, the current value of the fan is obtained, the current value of the fan is compared with the current threshold, when the current value is larger than or equal to the current threshold and the duration time reaches the duration threshold, the current of the fan is gradually increased under the same rotating speed, the energy consumption is gradually increased, and then the frosting of the heat exchanger is determined.
In any of the above technical solutions, further, the step of determining whether the heat exchanger frosts according to the operation parameters of the air conditioner specifically includes: acquiring the temperature of a coil of a heat exchanger and a first drop value corresponding to the temperature within a first time period; and determining that the heat exchanger frosts on the basis of the condition that the first drop value is greater than or equal to the temperature threshold value.
In the technical scheme, when the frosting of the heat exchanger is judged, the judgment can be carried out according to the change condition of the temperature of the coil pipe on the heat exchanger, specifically, the temperature of the coil pipe is obtained, the reduction rate of the temperature of the coil pipe is calculated, specifically, a first reduction value corresponding to the temperature in a first time length is obtained, and if the first reduction value is larger than or equal to a temperature threshold value, the temperature of the coil pipe is reduced too fast in the first time length, so that the frosting of the heat exchanger can be determined.
In any of the above technical solutions, further, the step of determining whether the heat exchanger frosts according to the operation parameters of the air conditioner specifically includes: acquiring a return air pressure value of the air conditioner and a corresponding second drop value of the pressure value in a second time period; and determining that the heat exchanger frosts on the basis of the condition that the second reduction value is greater than or equal to the pressure threshold value.
In the technical scheme, when the frosting of the heat exchanger is judged, the frosting of the heat exchanger can be judged according to the change situation of the return air pressure value of the air conditioner, specifically, in the operation process of the air conditioner, a compressor of the air conditioner continuously compresses a refrigerant, the refrigerant returns to the compressor from an air suction end after circulating in a refrigeration or heating loop, the return air pressure value of the air conditioner is also the return air pressure value of the return air end of the compressor, and under the condition that a second reduction value of the return air pressure value in a second duration is greater than a pressure threshold value, the pressure of the return air end of the compressor is insufficient, namely, the heat exchange capacity of the heat exchanger is reduced rapidly in the circulation process of the refrigerant, so that the frosting of the heat exchanger.
In any of the above technical solutions, further, the step of controlling the fan to rotate at the second rotation speed in the direction opposite to the first direction specifically includes: controlling the fan to rotate along the direction opposite to the first direction and acquiring the rotation duration of the fan; and controlling the fan to rotate along the first direction based on the condition that the rotating time of the fan reaches the third time.
In the technical scheme, after the frosting of the heat exchanger is judged, the fan is controlled to rotate in the direction opposite to the first direction, namely, the fan is controlled to rotate reversely, so that the heat exchanger is defrosted through convection heat exchange, specifically, in the process of controlling the fan to rotate reversely, the fan is rotated for the third time, when the reverse time of the fan reaches the third time, the fan can be understood as generating a better defrosting effect on the heat exchanger, so that the fan can rotate in the normal direction, namely, the fan is controlled to continue to rotate in the first direction.
In any of the above technical solutions, further, the method further includes: acquiring the reverse rotation times of the fan; and controlling the air conditioner to refrigerate to defrost the heat exchanger based on the condition that the reverse rotation times are larger than or equal to the rotation times threshold value.
In the technical scheme, in the operation process of the air conditioner, the frosting condition can also appear in a period of time after the defrosting is carried out through the fan in a reverse mode, and then the fan is required to be driven to rotate for defrosting again, wherein in the operation process of the air conditioner, the reverse rotation frequency of the fan is recorded, when the reverse rotation frequency of the fan is larger than or equal to the threshold value of the rotation frequency, namely the fan is driven to rotate for multiple times for defrosting in the operation period of the air conditioner, the defrosting capacity is insufficient when the fan rotates for multiple times for defrosting possibly, and the air conditioner can be controlled to operate in a refrigeration mode to defrost the heat exchanger at the moment.
In any of the above technical solutions, further, after the step of controlling defrosting of the air conditioner, the method further includes: the number of inversions is cleared.
According to the technical scheme, after the air conditioner is controlled to defrost, the reversing times are cleared, namely the reversing times are cleared, so that whether the air conditioner enters a conventional defrosting mode is determined again according to the reversing times.
According to a third aspect of the present invention, there is provided a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the method for controlling an air conditioner according to any one of the above-mentioned first aspects, so that the method has all the technical effects of the method for controlling an air conditioner, and the details are not repeated herein.
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 shows a schematic block diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a partial structural view showing an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method of an air conditioner according to still another embodiment of the present invention;
fig. 6 is a flowchart illustrating a control method of an air conditioner according to still another embodiment of the present invention;
fig. 7 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present invention.
Wherein, the corresponding relationship between the reference numbers and the names of the components in fig. 2 is:
106 outdoor units, 1060 heat exchangers, 1061 fans, 1062 compressors, 1063 gas-liquid separators, 1064 four-way valves, 1065 outdoor unit temperature sensors, 1066 heat exchanger temperature sensors, 1067 throttling components, 1068 pressure sensors and 1069 stop valves.
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 air conditioner 100, the control method of the air conditioner 100, and the computer-readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 7.
The first embodiment is as follows:
as shown in fig. 1 and fig. 2, according to an embodiment of the first aspect of the present invention, the present invention provides an air conditioner 100, the air conditioner 100 includes an outdoor unit 106, the outdoor unit 106 includes a fan 1061 and a heat exchanger 1060, and further includes: a memory 102, a processor 104, and a computer program stored on the memory 102 and executable on the processor 104.
In particular, the processor 104, when executing the computer program, implements: controlling the fan 1061 to rotate in a first direction; judging whether the heat exchanger 1060 is frosted according to the operation parameters of the air conditioner 100; the frosting of the heat exchanger 1060 is determined and the fan 1061 is controlled to rotate in a direction opposite to the first direction.
Specifically, the fan 1061 is provided corresponding to the heat exchanger 1060.
According to the air conditioner 100 provided by the invention, whether the heat exchanger 1060 frosts is judged according to the running parameters of the air conditioner 100, when the heat exchanger 1060 frosts is judged, the fan 1061 is controlled to reversely rotate to defrost the heat exchanger 1060 through convection heat exchange, and when the heat exchanger 1060 frosts is judged, the flowing direction of the refrigerant does not need to be switched by switching the four-way valve 1064 of the air conditioner 100 to refrigerate the air conditioner 100 to defrost, and it can be understood that when the heat exchanger 1060 frosts is judged, the defrosting is realized by reversing the fan 1061, and the direction of the four-way valve 1064 does not need to be switched to enter a defrosting program as in the related technology, so that the influence on the use comfort level of a user due to large indoor temperature change is avoided.
Specifically, the operation parameters of the air conditioner 100 include a current value of the fan 1061, a temperature of a coil of the heat exchanger 1060, a return air pressure value of the air conditioner 100, and the like.
Example two:
according to an embodiment of the present invention, the method includes the features defined in the first embodiment, and: when the processor 104 executes the computer program, the step of determining whether the heat exchanger 1060 is frosted according to the operation parameters of the air conditioner 100 is realized, specifically, the following steps are realized: acquiring a current value when the fan 1061 rotates at a first rotation speed; the frosting of the heat exchanger 1060 is determined based on the current value being greater than or equal to the current threshold value and the duration reaching the duration threshold value.
In this embodiment, when determining whether the heat exchanger 1060 is frosted, the determination may be performed according to a change of a current value of the fan 1061, specifically, when the fan 1061 rotates in the first direction, a current value of the fan 1061 is obtained, the current value of the fan 1061 is compared with a current threshold, and when the current value is greater than or equal to the current threshold and the duration time reaches a duration threshold, it is described that the current of the fan 1061 is gradually increased at the same rotation speed, the energy consumption is gradually increased, and then frosting of the heat exchanger 1060 is determined.
Specifically, when the heat exchanger 1060 is not frosted or the air conditioner 100 initially operates, the current value when the fan 1061 rotates in the first direction and the rotation speed is the first rotation speed is set as the current threshold, and in the operation process of the air conditioner 100, the current value when the fan 1061 rotates at the first rotation speed is obtained in real time, and the current value is compared with the current threshold, so as to determine whether the heat exchanger 1060 is frosted. The value of the first rotating speed can be a plurality of values.
Specifically, the current threshold may also be set empirically, such as any of 1A to 10A, but of course, may be other values.
Example three:
according to an embodiment of the present invention, the method includes the features defined in the first embodiment, and: when the processor 104 executes the computer program, the step of determining whether the heat exchanger 1060 is frosted according to the operation parameters of the air conditioner 100 is realized, specifically, the following steps are realized: acquiring the temperature of a coil of the heat exchanger 1060 and a first drop value corresponding to the temperature within a first time period; the frosting of the heat exchanger 1060 is determined based on the first drop value being equal to or greater than the temperature threshold value.
In this embodiment, when determining whether the heat exchanger 1060 is frosted, the determination may be performed according to a change condition of the temperature of the coil on the heat exchanger 1060, specifically, the temperature of the coil is obtained, and a decrease rate of the temperature of the coil is calculated, specifically, a first decrease value corresponding to the temperature within a first time period is obtained, and if the first decrease value is greater than or equal to a temperature threshold value, that is, the temperature of the coil decreases too fast within the first time period, it may be determined that the heat exchanger 1060 is frosted.
Specifically, the value range of the first duration may be 5 minutes to 60 minutes, the value range of the temperature threshold may be 1 ℃/min to 5 ℃/min, and the temperature threshold may also be other values.
Example four:
according to an embodiment of the present invention, the method includes the features defined in the first embodiment, and: when the processor 104 executes the computer program, the step of determining whether the heat exchanger 1060 is frosted according to the operation parameters of the air conditioner 100 is realized, specifically, the following steps are realized: acquiring a return air pressure value of the air conditioner 100 and a corresponding second drop value of the pressure value in a second time period; the frosting of the heat exchanger 1060 is determined based on the second drop value being equal to or greater than the pressure threshold value.
In this embodiment, when determining whether the heat exchanger 1060 is frosted, the determination may be performed according to a change of a return air pressure value of the air conditioner 100, specifically, during an operation of the air conditioner 100, the compressor 1062 of the air conditioner 100 continuously compresses a refrigerant, the refrigerant returns to the compressor 1062 from an air suction end after circulating in a refrigeration or heating loop, a return air pressure value of the air conditioner 100, that is, a return air pressure value of a return air end of the compressor 1062, and when a second drop value of the return air pressure value in a second time period is greater than a pressure threshold value, it is described that a pressure at the return air end of the compressor 1062 is insufficient, that is, a heat exchange capacity of the heat exchanger 1060 drops faster during a circulation of the refrigerant, so as to determine that the heat exchanger 1060 is frosted.
Specifically, the value range of the second time period may be 5 minutes to 60 minutes, and the value range of the pressure threshold may be 0.1MPa/min to 2MPa/min, although the pressure threshold may also be other values.
Example five:
according to an embodiment of the invention, including the features defined in any of the above embodiments, and: when the processor 104 executes the computer program, the step of controlling the fan 1061 to rotate at the second rotation speed in the direction opposite to the first direction is realized, specifically, the following steps are implemented: controlling the fan 1061 to rotate in a direction opposite to the first direction and acquiring a time length of rotation of the fan 1061; the fan 1061 is controlled to rotate in the first direction based on the case where the period of time for which the fan 1061 rotates reaches the third period of time.
In this embodiment, after it is determined that the heat exchanger 1060 is frosted, the fan 1061 is controlled to rotate in a direction opposite to the first direction, that is, the fan 1061 is controlled to rotate reversely, so as to defrost the heat exchanger 1060 through convection heat transfer, specifically, in the process of controlling the fan 1061 to rotate reversely, the fan 1061 is rotated for a third time period, and when the time period for the fan 1061 to rotate reversely reaches the third time period, it can be understood that a good defrosting effect has been generated on the heat exchanger 1060, so that the fan 1061 can rotate in a normal direction, that is, the fan 1061 is controlled to rotate continuously in the first direction.
Specifically, after the fan 1061 is controlled to rotate reversely, the rotation speed of the fan 1061 is set to a second rotation speed, that is, based on frosting of the heat exchanger 1060, the fan 1061 is controlled to rotate at the second rotation speed in a reverse direction opposite to the first direction for a third period of time, and then the fan 1061 is controlled to operate according to a normal operation mode.
Specifically, the third time period may be any value between 10min and 30 min.
In particular, the processor 104, when executing the computer program, further implements: acquiring the number of times of reversal of the fan 1061; based on the number of times of reverse rotation being equal to or greater than the threshold number of times of rotation, the air conditioner 100 is controlled to cool to defrost the heat exchanger 1060.
In this embodiment, during the operation of the air conditioner 100, a frosting condition still occurs in a period of time after the fan 1061 reversely rotates to defrost, and further the fan 1061 needs to reversely rotate to defrost again, wherein, during the operation of the air conditioner 100, the number of times the fan 1061 reversely rotates is recorded, when the number of times the fan 1061 reversely rotates is greater than or equal to the threshold value of the number of times of rotation, that is, when the fan 1061 reversely rotates to defrost for multiple times during the operation of the air conditioner 100, there may be a case that the defrosting capability of the fan 1061 when reversely rotating to defrost is insufficient, and at this time, the air conditioner 100 may be controlled to operate the cooling mode to defrost the heat exchanger 1060.
Specifically, the flow direction of the refrigerant may be switched by adjusting the four-way valve 1064 of the air conditioner 100, so that the air conditioner 100 that originally heats cools to defrost the heat exchanger 1060. Specifically, in the step of controlling the air conditioner 100 to operate the cooling mode to defrost the heat exchanger 1060, a step of determining whether to enter the normal defrosting mode may be further added.
Specifically, the threshold of the number of rotations may be determined according to the ambient temperature of the outdoor unit 106, specifically, the lower the ambient temperature of the outdoor unit 106 is, the more the threshold of the number of rotations is, of course, the threshold of the number of rotations may also be determined according to practical experience, such as any value in 5 times to 10 times.
Specifically, after the step of controlling the air conditioner 100 to defrost is implemented when the processor 104 executes the computer program, the following steps are further implemented: the number of inversions is cleared.
In this embodiment, after the air conditioner 100 is controlled to defrost, the inversion number is cleared, that is, cleared, so that whether to enter the normal defrosting mode is determined again according to the inversion number next time.
Specifically, as shown in fig. 2, the air conditioner 100 includes a compressor 1062, a heat exchanger 1060, a fan 1061, a compressor 1062, a gas-liquid separator 1063, a four-way valve 1064, an outdoor unit temperature sensor 1065, a heat exchanger temperature sensor 1066, a throttle unit 1067, a pressure sensor 1068, a stop valve 1069, and the like. The air return end of the compressor 1062 is provided with a pressure sensor 1068, a coil of the heat exchanger 1060 is provided with a heat exchanger temperature sensor 1066, an outdoor unit temperature sensor 1065 is used for detecting the temperature of the outdoor environment, a four-way valve 1064 is used for switching the flow direction of the refrigerant of the air conditioner 100, so as to adjust the operation mode of the air conditioner 100, the heat exchanger 1060 is connected with the compressor 1062 through the four-way valve 1064, the gas-liquid separator 1063 is connected with the compressor 1062 through the four-way valve 1064, and a stop valve 1069 and a throttling component 1067 are respectively arranged on a loop, so as to adjust the amount of the.
Example six:
according to the second aspect of the invention, the invention also provides a control method of the air conditioner.
Fig. 3 is a flow chart illustrating a control method of an air conditioner according to the present invention, as shown in fig. 3, the method including:
step 302: controlling the fan to rotate along a first direction;
step 304: judging whether the heat exchanger is frosted or not according to the operation parameters of the air conditioner;
step 306: and determining frosting of the heat exchanger, and controlling the fan to rotate in the direction opposite to the first direction.
The control method of the air conditioner provided by the invention judges whether the heat exchanger frosts according to the running parameters of the air conditioner, controls the fan to reversely rotate to defrost the heat exchanger through convection heat exchange when judging that the heat exchanger frosts, and does not need to switch the flow direction of the refrigerant through switching the four-way valve of the air conditioner to refrigerate the air conditioner to defrost when judging that the heat exchanger frosts.
Specifically, the operation parameters of the air conditioner include a current value of the fan, a temperature of a coil of the heat exchanger, a return air pressure value of the air conditioner, and the like.
Example seven:
fig. 4 is a flowchart illustrating a control method of an air conditioner according to the present invention, as shown in fig. 4, the method including:
step 402: controlling the fan to rotate along a first direction;
step 404: acquiring a current value when the fan rotates at a first rotating speed;
step 406: determining that the heat exchanger frosts on the basis that the current value is greater than or equal to the current threshold and the duration reaches the duration threshold;
step 408: the fan is controlled to rotate in a direction opposite to the first direction.
In this embodiment, when determining whether the heat exchanger is frosted, the determination may be performed according to a change of a current value of the fan, specifically, when the fan rotates in the first direction, a current value of the fan is obtained, the current value of the fan is compared with a current threshold, and when the current value is greater than or equal to the current threshold and the duration time reaches a duration threshold, it is described that the current of the fan is gradually increased and the energy consumption is gradually increased at the same rotation speed, so as to determine that the heat exchanger is frosted.
Specifically, when the heat exchanger is not frosted or the air conditioner initially runs, the current value when the fan rotates along the first direction and the rotating speed is the first rotating speed is set as the current threshold value, in the running process of the air conditioner, the current value when the fan rotates at the first rotating speed is obtained in real time, the current value is compared with the current threshold value, and whether the heat exchanger is frosted or not is judged. The value of the first rotating speed can be a plurality of values.
In particular, the current threshold may also be set empirically.
Specifically, the first rotational speed may be any one of 800r/min to 1500 r/min.
Example eight:
fig. 5 is a flowchart illustrating a control method of an air conditioner according to the present invention, as shown in fig. 5, the method including:
step 502: controlling the fan to rotate along a first direction;
step 504: acquiring the temperature of a coil of a heat exchanger and a first drop value corresponding to the temperature within a first time period;
step 506: determining that the heat exchanger frosts on the basis that the first drop value is larger than or equal to the temperature threshold value;
step 508: the fan is controlled to rotate in a direction opposite to the first direction.
In this embodiment, when determining whether the heat exchanger is frosted, the determination may be performed according to a change condition of a coil temperature on the heat exchanger, specifically, the temperature of the coil is obtained, and a decrease rate of the temperature of the coil is calculated, specifically, a first decrease value corresponding to the temperature within a first time period is obtained, and if the first decrease value is greater than or equal to a temperature threshold value, that is, the temperature of the coil decreases too fast within the first time period, so that frosting of the heat exchanger may be determined.
Specifically, the first time period may be 5 minutes, 10 minutes, and the like, and the temperature threshold may range from 2 ℃/min to 10 ℃/min, although the temperature threshold may also be other values.
Example nine:
fig. 6 is a flowchart illustrating a control method of an air conditioner according to the present invention, as shown in fig. 6, the method including:
step 602: controlling the fan to rotate along a first direction;
step 604: acquiring a return air pressure value of the air conditioner and a corresponding second drop value of the pressure value in a second time period;
step 606: determining that the heat exchanger frosts on the basis of the condition that the second reduction value is greater than or equal to the pressure threshold value;
step 608: the fan is controlled to rotate in a direction opposite to the first direction.
In this embodiment, when determining whether the heat exchanger is frosted, the determination may be performed according to a change of a return air pressure value of the air conditioner, specifically, in an operation process of the air conditioner, a compressor of the air conditioner continuously compresses a refrigerant, the refrigerant returns to the compressor from an air suction end after circulating in a refrigeration or heating loop, a return air pressure value of the air conditioner is also a return air pressure value of the return air end of the compressor, and when a second drop value of the return air pressure value within a second time period is greater than a pressure threshold value, it is described that the pressure of the return air end of the compressor is insufficient, that is, a heat exchange capacity of the heat exchanger drops faster in a circulation process of the refrigerant, so as to determine that the heat exchanger is frosted.
Specifically, the second time period may be 5 minutes, 10 minutes, and the like, and the value range of the pressure threshold may be 2MPa/min to 10MPa/min, and of course, the pressure threshold may also be other values.
Example ten:
according to an embodiment of the invention, including the features defined in any of the above embodiments, and: the step of controlling the fan to rotate along the direction opposite to the first direction specifically comprises: controlling the fan to rotate in a direction opposite to the first direction at a second rotating speed and acquiring the rotating duration of the fan; and controlling the fan to rotate along the first direction based on the condition that the rotating time of the fan reaches the third time.
In this embodiment, after it is determined that the heat exchanger is frosted, the fan is controlled to rotate in a direction opposite to the first direction, that is, the fan is controlled to rotate reversely, so that defrosting is performed on the heat exchanger through convection heat transfer, specifically, in the process of controlling the fan to rotate reversely, the fan is rotated for a third time period, and when the time period for the fan to rotate reversely reaches the third time period, it can be understood that a better defrosting effect is generated on the heat exchanger, so that the fan can rotate in a normal direction, that is, the fan is controlled to rotate continuously in the first direction.
Specifically, after the fan is controlled to rotate reversely, the rotating speed of the fan is made to be a second rotating speed, namely, on the basis of frosting of the heat exchanger, the fan is controlled to rotate in the reverse direction opposite to the first direction for a third time at the second rotating speed, and then the fan is controlled to operate according to a normal operation mode.
Specifically, the third time period can be any value between 10min and 30min, and the second rotating speed can be any rotating speed between 800r/min and 1500 r/min.
Specifically, the control method further includes: acquiring the reverse rotation times of the fan; and controlling the air conditioner to refrigerate to defrost the heat exchanger based on the condition that the reverse rotation times are larger than or equal to the rotation times threshold value.
In this embodiment, in the operation process of the air conditioner, the condition of frosting still can appear in a period of time after defrosting through fan reversal, and then still need the fan to reverse defrosting again, wherein, in the operation process of the air conditioner, the number of times of fan reversal is recorded, when the number of times of fan reversal is greater than or equal to the rotation number threshold value, also be in the air conditioner operation period fan reversal defrosting many times, the condition that the defrosting ability is not enough when the fan reverses defrosting may exist, at this moment, the air conditioner operation refrigeration mode can be controlled to defrost the heat exchanger.
Specifically, the flow direction of the refrigerant can be switched by adjusting a four-way valve of the air conditioner, so that the originally heated air conditioner is cooled, and the heat exchanger is defrosted. Specifically, in the step of controlling the air conditioner to operate the cooling mode to defrost the heat exchanger, a step of determining whether to enter a conventional defrosting mode may be added.
Specifically, the threshold value of the number of rotations may be determined according to the ambient temperature of the outdoor unit, or may be determined empirically, for example, any value from 5 times to 10 times.
Specifically, after the step of controlling the air conditioner to defrost, the method further comprises the following steps: the number of inversions is cleared.
In this embodiment, after the air conditioner is controlled to defrost, the inversion times are cleared, that is, the inversion times are cleared, so that whether to enter the normal defrosting mode is determined again according to the inversion times next time.
Example eleven:
fig. 7 is a flowchart illustrating a control method of an air conditioner according to the present invention, as shown in fig. 7, the method including:
step 700: controlling the fan to rotate along a first direction;
step 701: acquiring a current value when the fan rotates at a first rotating speed;
step 702: judging whether the current value is greater than or equal to the current threshold value, if so, skipping to step 707, and if not, skipping to step 701;
wherein, step 700 may be followed by:
step 703: acquiring the temperature of a coil of a heat exchanger and a first drop value corresponding to the temperature within a first time period;
step 704: judging whether the first drop value is larger than or equal to the temperature threshold value, if so, jumping to a step 707, otherwise, jumping to a step 703;
wherein, step 700 may be followed by:
step 705: acquiring a return air pressure value of the air conditioner and a corresponding second drop value of the pressure value in a second time period;
step 706: judging whether the second descending value is larger than or equal to the pressure threshold value, if so, skipping to step 707, otherwise, skipping to step 705;
step 707: controlling a first rotating speed of the fan to rotate for a third time length along the direction opposite to the first direction, and recording the number of times of fan reversal;
step 708: judging whether the reversal times is larger than or equal to a rotation time threshold, if so, jumping to a step 709, and if not, jumping to the step 701, the step 703 or the step 705;
step 709: and entering a conventional heat pump defrosting mode, and clearing the reverse rotation times of the fan.
In the embodiment, whether the air conditioner needs defrosting is judged by detecting the current value of the fan, the ambient temperature value of the outdoor unit, the temperature value of the coil pipe and the return air pressure value at the first speed in real time. Specifically, if the current value of the fan at the first rotation speed is greater than or equal to the current threshold (the current threshold is a constant) and lasts for a first time period, or the first drop value of the coil temperature of the outdoor unit is greater than or equal to the temperature threshold (the temperature threshold is a constant), or the second drop value of the return air pressure value of the outdoor unit is greater than or equal to the pressure threshold (the pressure threshold is a constant), the fan of the outdoor unit is controlled to perform reverse defrosting for a third time period (the third time period is a constant) at the second rotation speed (the second rotation speed is a constant), and then the fan operates in the normal operation mode.
The reverse defrosting times of the fan are limited by the environment temperature of the outdoor unit in the heating operation process, after the reverse defrosting times of the fan reach a rotation time threshold, whether the conventional defrosting is performed or not is judged according to the conventional heat pump defrosting judgment condition, meanwhile, the reverse defrosting times of the fan are cleared, the fan of the outdoor unit reversely rotates to defrost, and the comfort level of a user can be guaranteed to the maximum extent.
Example twelve:
according to a third aspect of the present invention, there is provided a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the method for controlling an air conditioner according to any one of the embodiments of the first aspect, so as to achieve all the technical effects of the method for controlling an air conditioner, and the method is not repeated herein.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or integral connections; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
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 description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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. The utility model provides an air conditioner, air conditioner includes the off-premises station, the off-premises station includes fan and heat exchanger, its characterized in that still includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor when executing the computer program implementing:
controlling the fan to rotate along a first direction;
judging whether the heat exchanger frosts according to the operation parameters of the air conditioner;
and determining that the heat exchanger is frosted, and controlling the fan to rotate in the direction opposite to the first direction.
2. The air conditioner according to claim 1, wherein the processor, when executing the computer program, performs the step of determining whether the heat exchanger is frosted according to the operating parameters of the air conditioner, specifically by:
acquiring a current value when the fan rotates at a first rotating speed;
determining that the heat exchanger frosts on the basis that the current value is greater than or equal to the current threshold value and the duration reaches the duration threshold value; and/or
Acquiring the temperature of a coil of the heat exchanger and a corresponding first drop value of the temperature in a first time period;
determining that the heat exchanger is frosted on the basis of the condition that the first drop value is greater than or equal to a temperature threshold value; and/or
Acquiring a return air pressure value of the air conditioner and a corresponding second drop value of the pressure value in a second time period;
and determining that the heat exchanger is frosted on the basis of the condition that the second reduction value is greater than or equal to the pressure threshold value.
3. The air conditioner of claim 1, wherein the processor, when executing the computer program, implements the step of controlling the fan to rotate in a direction opposite to the first direction, and in particular implements:
controlling the fan to rotate in a direction opposite to the first direction at a second rotating speed and acquiring the rotating duration of the fan;
and controlling the fan to rotate along the first direction based on the condition that the rotating time of the fan reaches a third time.
4. The air conditioner according to any one of claims 1 to 3, wherein the processor, when executing the computer program, further implements:
acquiring the reverse rotation times of the fan;
and controlling the air conditioner to refrigerate to defrost the heat exchanger based on the condition that the reversal times are greater than or equal to the threshold value of the rotation times.
5. The air conditioner of claim 4, wherein the processor, when executing the computer program, further performs, after the step of controlling defrosting of the air conditioner:
clearing the reversal times.
6. A control method of an air conditioner, the air conditioner comprises an outdoor unit, the outdoor unit comprises a fan and a heat exchanger, and the control method comprises the following steps:
controlling the fan to rotate along a first direction;
judging whether the heat exchanger frosts according to the operation parameters of the air conditioner;
and determining that the heat exchanger is frosted, and controlling the fan to rotate in the direction opposite to the first direction.
7. The method for controlling an air conditioner according to claim 6, wherein the step of judging whether the heat exchanger is frosted according to the operation parameters of the air conditioner specifically comprises:
acquiring a current value of the fan;
determining that the heat exchanger frosts on the basis that the current value is greater than or equal to the current threshold value and the duration reaches the duration threshold value; and/or
Acquiring the temperature of a coil of the heat exchanger and a corresponding first drop value of the temperature in a first time period;
determining that the heat exchanger is frosted on the basis of the condition that the first drop value is greater than or equal to a temperature threshold value; and/or
Acquiring a return air pressure value of the air conditioner and a corresponding second drop value of the pressure value in a second time period;
and determining that the heat exchanger is frosted on the basis of the condition that the second reduction value is greater than or equal to the pressure threshold value.
8. The method for controlling an air conditioner according to claim 6, wherein the step of controlling the fan to rotate in a direction opposite to the first direction specifically comprises:
controlling the fan to rotate in the direction opposite to the first direction and acquiring the rotation duration of the fan;
and controlling the fan to rotate along the first direction based on the condition that the rotating time of the fan reaches a third time.
9. The control method of an air conditioner according to any one of claims 6 to 8, further comprising:
acquiring the reverse rotation times of the fan;
and controlling the air conditioner to refrigerate to defrost the heat exchanger based on the condition that the reversal times are greater than or equal to the threshold value of the rotation times.
10. The method for controlling an air conditioner according to claim 9, further comprising, after the step of controlling the air conditioner to defrost:
clearing the reversal times.
11. A computer-readable storage medium on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the control method of an air conditioner according to any one of claims 6 to 10.
CN201910930988.4A 2019-09-27 2019-09-27 Air conditioner, control method of air conditioner, and computer-readable storage medium Pending CN110617603A (en)

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Application publication date: 20191227