CN113834201A - Air conditioner control method, air conditioner and storage medium - Google Patents
Air conditioner control method, air conditioner and storage medium Download PDFInfo
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- CN113834201A CN113834201A CN202111040810.6A CN202111040810A CN113834201A CN 113834201 A CN113834201 A CN 113834201A CN 202111040810 A CN202111040810 A CN 202111040810A CN 113834201 A CN113834201 A CN 113834201A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses an air conditioner control method, an air conditioner and a storage medium, wherein the method comprises the following steps: when an instruction of switching to a dehumidification mode is detected, the air conditioner is switched to the refrigeration mode from the current operation mode to control the air conditioner to carry out refrigeration and dehumidification, the bypass electromagnetic valve is opened when the refrigeration and dehumidification are started, the opening degree of an electronic expansion valve of an indoor unit is adjusted to be a target opening degree and lasts for a preset time, the phenomenon that excessive refrigerants enter an indoor heat exchanger can be reduced, the return air temperature of the compressor can be improved by reducing the refrigerants entering the indoor heat exchanger and enabling the refrigerants discharged by the compressor to flow back to an air return pipe through the bypass electromagnetic valve, the superheat degree of the compressor is further increased, the problem that the superheat degree of the compressor is difficult to establish due to the fact that the environment temperature is too low in the refrigeration and dehumidification period of the air conditioner is avoided, and the reliability of operation of the compressor is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method, an air conditioner and a storage medium.
Background
Air conditioning dehumidification (Air conditioning dehumidification) means that the whole Air conditioner is in a dehumidification operation state, and at the moment, a fan of an indoor unit operates slowly, so that moisture in Air is condensed into liquid to achieve the dehumidification effect.
At present, when an air conditioner dehumidifies in a low-temperature environment, the temperature of a heat exchanger of an indoor unit and the temperature of a condenser of an outdoor unit are both low, so that the return air temperature of a compressor is reduced, the temperature of the compressor is too low, and the running reliability of the compressor is affected.
Disclosure of Invention
The embodiment of the application provides an air conditioner control method, an air conditioner and a storage medium, and aims to solve the technical problem that the operation reliability of a compressor is influenced by dehumidification of the air conditioner in a low-temperature environment.
The embodiment of the application provides an air conditioner control method, which comprises the following steps:
detecting an instruction for switching to a dehumidification mode, and controlling the air conditioner to perform refrigeration operation;
adjusting the opening degree of an electronic expansion valve of an indoor unit of the air conditioner to a target opening degree and lasting for a preset time;
and adjusting the opening degree of the electronic expansion valve according to the superheat degree of the indoor heat exchanger.
In one embodiment, after the step of detecting the command for switching to the initial mode and controlling the air conditioner to perform the cooling operation, the method further includes:
acquiring the indoor temperature of the air conditioner;
when the indoor temperature is within a preset temperature range, the step of adjusting the opening degree of an electronic expansion valve of an indoor unit of the air conditioner to a target opening degree and lasting for a preset time is executed;
and when the indoor temperature is higher than the maximum value of the preset temperature interval, executing the step of adjusting the opening degree of the electronic expansion valve according to the superheat degree of the indoor heat exchanger.
In an embodiment, after the step of adjusting the opening degree of the electronic expansion valve according to the superheat degree of the indoor heat exchanger is performed when the indoor temperature is greater than the maximum value of the preset temperature interval, the method further includes:
controlling a fan of the indoor unit to operate according to an automatic windshield; and/or the presence of a gas in the gas,
and adjusting the running frequency of the compressor according to the target evaporation temperature of the air conditioner.
In an embodiment, after the step of adjusting the opening degree of the electronic expansion valve according to the superheat degree of the heat exchanger of the indoor unit, the method further includes:
acquiring the indoor temperature of the air conditioner;
and when the indoor temperature is lower than the minimum value of the preset temperature interval, closing the indoor unit and/or closing the electronic expansion valve.
In one embodiment, the outdoor unit of the air conditioner is provided with an oil return flow path communicated with the exhaust port and the return port of the compressor, and the oil return flow path is provided with a bypass electromagnetic valve; after the step of adjusting the opening degree of the electronic expansion valve of the indoor unit of the air conditioner to the target opening degree and continuing for the preset time, the method further comprises the following steps:
and opening the bypass electromagnetic valve.
In an embodiment, after the step of adjusting the opening degree of an electronic expansion valve of an indoor unit of the air conditioner to a target opening degree for a preset time period, the method further includes:
when the indoor units with the indoor temperatures within the preset temperature interval account for more than or equal to the set proportion in all the started indoor units, the target evaporation temperature of the air conditioner is reduced;
and adjusting the running frequency of the compressor according to the reduced target evaporation temperature.
In one embodiment, the step of lowering the target evaporation temperature of the air conditioner includes:
acquiring a correction value;
and reducing the target evaporation temperature according to the correction value.
In one embodiment, after the step of reducing the target evaporation temperature of the air conditioner, the method further includes:
acquiring the number of indoor units with indoor temperature within a preset temperature interval;
and when the number is greater than or equal to a preset number, executing the step of adjusting the operating frequency of the compressor according to the reduced target evaporation temperature.
In addition, to achieve the above object, the present invention also provides an air conditioner including: the air conditioner control method comprises a memory, a processor and an air conditioner control program which is stored on the memory and can run on the processor, wherein the air conditioner control program realizes the steps of the air conditioner control method when being executed by the processor.
Further, to achieve the above object, the present invention also provides a storage medium having stored thereon an air conditioner control program which, when executed by a processor, implements the steps of the air conditioner control method described above.
The technical scheme of the air conditioner control method, the air conditioner and the storage medium provided in the embodiment of the application at least has the following technical effects or advantages:
the technical scheme is that when an instruction of switching to the dehumidification mode is detected, the air conditioner is switched to the refrigeration mode from the current operation mode to control the air conditioner to carry out refrigeration and dehumidification, the opening degree of an electronic expansion valve of an indoor unit is adjusted to be the target opening degree and lasts for a preset time length when refrigeration and dehumidification are started, so that the phenomenon that excessive refrigerants enter an indoor heat exchanger can be reduced, the return air temperature of the compressor can be improved by reducing the refrigerants entering the indoor heat exchanger, the superheat degree of the compressor is increased, and the operation reliability of the compressor is improved.
Drawings
FIG. 1 is a schematic diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a control method of an air conditioner according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a second embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 4 is a flow chart illustrating a third embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 5 is a schematic diagram of an air conditioner system;
fig. 6 is a flowchart illustrating a fourth embodiment of the air conditioner control method according to the present invention.
Detailed Description
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The utility model provides a solve the air conditioner and dehumidify under low temperature environment, the technical problem of the reliability of compressor operation is influenced, adopted when detecting the instruction that switches to dehumidification mode, switch over the air conditioner into the refrigeration mode from current operating mode, refrigerate the dehumidification with the control air conditioner, adjust the aperture of the electronic expansion valve of indoor set for the target aperture and last for predetermineeing for a long time when refrigeration dehumidification begins, can reduce too much refrigerant and get into indoor heat exchanger, can improve the return air temperature of compressor through the refrigerant that reduces to get into indoor heat exchanger, and then increase the technical scheme of compressor superheat degree, the reliability of compressor operation has been improved.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a hardware operating environment according to an embodiment of the present invention.
It should be noted that fig. 1 is a schematic structural diagram of a hardware operating environment of the air conditioner.
As shown in fig. 1, the air conditioner may include: a processor 1001, such as a CPU, a memory 1005, a user interface 1003, a network interface 1004, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the air conditioner configuration shown in fig. 1 is not intended to be limiting of the air conditioner and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and an air conditioner control program. Among them, the operating system is a program that manages and controls hardware and software resources of the air conditioner, an air conditioner control program, and the operation of other software or programs.
In the air conditioner shown in fig. 1, the user interface 1003 is mainly used for connecting a terminal, and performing data communication with the terminal; the network interface 1004 is mainly used for the background server and performs data communication with the background server; the processor 1001 may be used to invoke an air conditioner control program stored in the memory 1005.
In the present embodiment, an air conditioner includes: a memory 1005, a processor 1001, and an air conditioner control program stored on the memory 1005 and executable on the processor, wherein:
when the processor 1001 calls the air conditioner control program stored in the memory 1005, the following operations are performed:
detecting an instruction for switching to a dehumidification mode, and controlling the air conditioner to perform refrigeration operation;
adjusting the opening degree of an electronic expansion valve of an indoor unit of the air conditioner to a target opening degree and lasting for a preset time;
and adjusting the opening degree of the electronic expansion valve according to the superheat degree of the indoor heat exchanger.
While a logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in an order different than that shown or described herein.
As shown in fig. 2, in a first embodiment of the present application, an air conditioner control method of the present application includes the steps of:
step S210: and detecting an instruction for switching to a dehumidification mode, and controlling the air conditioner to perform refrigeration operation.
When the air conditioner is normally started and operated, the air conditioner sets a current opening degree of an electronic expansion valve of an indoor unit according to a preset initial opening degree of an indoor electronic expansion valve corresponding to a current working mode, that is, the current opening degree is set to the preset initial opening degree, the preset initial opening degree is kept unchanged and kept for a certain period of time, then a superheat degree of an indoor heat exchanger is obtained, the opening degree of the electronic expansion valve of the indoor unit is adjusted according to the superheat degree of the indoor heat exchanger, and if the opening degree of the electronic expansion valve of the indoor unit is increased or decreased, the electronic expansion valve of the indoor unit is hereinafter referred to as an indoor electronic expansion valve. The current operation mode is, for example, a cooling mode, a heating mode, etc. If the air conditioner starts to operate in the cooling mode, the preset initial opening of the indoor electronic expansion valve corresponding to the set cooling mode is K1, and the certain time needing to be kept is 5 minutes, after the air conditioner starts to operate in the cooling mode, the current opening of the indoor electronic expansion valve is set to be K1, then K1 is kept unchanged, the time lasts for 5 minutes, after 5 minutes, the superheat degree of the indoor heat exchanger is obtained, and the current opening of the electronic expansion valve of the indoor unit is adjusted according to the obtained superheat degree of the indoor heat exchanger.
In this embodiment, the air conditioner includes an outdoor unit and one or more indoor units. During the operation of the air conditioner according to the current working mode, if a user currently has a dehumidification demand, for example, an instruction for switching to the dehumidification mode is sent to the air conditioner through a remote controller, the dehumidification instruction can be sent to the air conditioner, and the air conditioner performs refrigeration operation after detecting the dehumidification instruction, that is, the air conditioner is switched to the refrigeration mode from the current working mode to further perform refrigeration and dehumidification. If the current working mode of the air conditioner is a heating mode, switching from the heating mode to a cooling mode; and if the current working mode of the air conditioner is the refrigeration mode, the switching is not carried out, and the air conditioner continues to operate according to the refrigeration mode. Wherein, the air conditioner refrigeration dehumidification means that the air conditioner is at cryogenic in-process, and the evaporating temperature of indoor heat exchanger (evaporimeter) has reduced below the dew point temperature, and when indoor air was inhaled by the fan of indoor set and passed through indoor heat exchanger, the vapor condensation in the air becomes water, then converges the drain pipe and leads to outdoor the row, and partial moisture in the indoor air has just so been disposed, and the humidity of air also can follow and reduce, so realized refrigeration dehumidification.
Step S220: and adjusting the opening degree of an electronic expansion valve of the indoor unit of the air conditioner to be a target opening degree and lasting for a preset time.
Step S230: and adjusting the opening degree of the electronic expansion valve according to the superheat degree of the indoor heat exchanger.
After the air conditioner is controlled to perform refrigeration operation according to the command of switching to the dehumidification mode, the current opening degree of the electronic expansion valve of the indoor unit is adjusted to be the target opening degree, and the preset time duration is continued. If the preset target opening degree is K2, the preset time is 5 minutes, after the air conditioner is controlled to perform cooling operation, the current opening degree of the electronic expansion valve of the indoor unit is adjusted to be K2, then K2 is kept unchanged, the duration is 5 minutes, after 5 minutes, the superheat degree of the indoor heat exchanger is obtained, and the current opening degree of the electronic expansion valve of the indoor unit is adjusted according to the obtained superheat degree of the indoor heat exchanger. Wherein the target opening degree is smaller than the preset initial opening degree.
After the air conditioner is controlled to perform cooling operation, the current opening degree of an electronic expansion valve of an indoor unit is adjusted to a target opening degree and lasts for a preset time length, and the method is characterized in that the air conditioner is made to establish the superheat degree of a return air port of a compressor during the cooling and dehumidifying period, and the superheat degree is hereinafter referred to as the compressor superheat degree. It can be understood that, on the basis of refrigeration and dehumidification of the air conditioner, the current opening degree of the electronic expansion valve of the indoor unit is adjusted to the target opening degree and lasts for a preset time, the refrigerant entering the indoor heat exchanger can be reduced, so that the outlet temperature of the indoor heat exchanger is increased, after the outlet temperature of the indoor heat exchanger is increased, the return air temperature of the compressor is also increased, correspondingly, the superheat degree of the compressor is increased, and the superheat degree of the compressor is established. When the quantity of the refrigerants entering the indoor heat exchanger is large, the outlet temperature of the indoor heat exchanger is lower than that of the refrigerants entering the indoor heat exchanger, if the quantity of the refrigerants entering the indoor heat exchanger is reduced, the outlet temperature of the indoor heat exchanger is increased relative to that of the refrigerants entering the indoor heat exchanger before the quantity of the refrigerants entering the indoor heat exchanger is not reduced, and therefore the return air temperature of the compressor can be increased. Further, on the basis of the established compressor superheat degree, the superheat degree of the indoor heat exchanger is obtained in real time, and the opening degree of the electronic expansion valve is adjusted according to the superheat degree of the indoor heat exchanger so as to adjust the compressor superheat degree.
According to the technical scheme, when an instruction of switching to the dehumidification mode is detected, the air conditioner is switched to the refrigeration mode from the current operation mode to control the air conditioner to carry out refrigeration and dehumidification, the opening degree of an electronic expansion valve of an indoor unit is adjusted to be the target opening degree and lasts for the preset time length when refrigeration and dehumidification are started, the phenomenon that excessive refrigerants enter an indoor heat exchanger can be reduced, the return air temperature of the compressor can be improved by reducing the refrigerants entering the indoor heat exchanger, the superheat degree of the compressor is increased, the problem that the compressor is difficult to build due to too low ambient temperature during refrigeration and dehumidification of the air conditioner is avoided, the compressor is caused to break down, and the reliability of operation of the compressor is improved.
As shown in fig. 3, in the second embodiment of the present application, the following steps are further included after step S210:
step S211: and acquiring the indoor temperature of the air conditioner.
Step S212: judging whether the indoor temperature is within a preset temperature interval, if so, executing step S220; if not, step S213 is performed.
Step S213: judging whether the indoor temperature is greater than the maximum value of the preset temperature interval, if so, executing step S230; if not, step S214 is performed.
Step S214: and closing the indoor unit and/or closing the electronic expansion valve.
Step S220: and adjusting the opening degree of an electronic expansion valve of the indoor unit of the air conditioner to be a target opening degree and lasting for a preset time.
Step S230: and adjusting the opening degree of the electronic expansion valve according to the superheat degree of the indoor heat exchanger.
Step S231: and acquiring the indoor temperature of the air conditioner.
Step S232: and judging whether the indoor temperature is smaller than the minimum value of the preset temperature interval, if so, executing the step S214, and if not, returning to execute the step S231.
In this embodiment, after the air conditioner is controlled to perform cooling operation, the indoor temperature is obtained, and then it is determined whether the current indoor temperature is too low according to the indoor temperature and a preset temperature interval, where the preset temperature interval is [ X, Y ], X is preferably 8 ℃, and Y is preferably 11 ℃. Specifically, if the indoor temperature is within the preset temperature interval, it indicates that the current indoor temperature is too low, that is, the current environment is a low-temperature environment, the air conditioner needs to be controlled to perform low-temperature dehumidification, that is, the current opening of the electronic expansion valve of the indoor unit is adjusted to be the target opening and lasts for a preset time, the refrigerant entering the indoor heat exchanger is reduced, the return air temperature of the compressor is increased, the superheat degree of the compressor is increased, the compressor is prevented from being broken down due to the fact that the superheat degree of the compressor is difficult to establish during refrigeration and dehumidification of the air conditioner, and the reliability of the operation of the compressor is improved. And if the indoor temperature is not in the preset temperature interval, judging whether the indoor temperature is greater than the maximum value of the preset temperature interval, if so, indicating that the air conditioner can perform dehumidification according to normal-temperature dehumidification control, namely adjusting the opening of the electronic expansion valve according to the superheat degree of the indoor heat exchanger in a refrigeration mode to perform dehumidification. If not, the dehumidification is not needed, namely the indoor unit is closed and/or the electronic expansion valve is closed. Similarly, after step S230, the indoor temperature is continuously obtained, the comparison is performed according to the obtained indoor temperature and the minimum value of the preset temperature interval, and if the obtained indoor temperature is less than the minimum value of the preset temperature interval, it indicates that dehumidification is not required, that is, the indoor unit is turned off and/or the electronic expansion valve is turned off.
Further, when the indoor temperature is greater than the maximum value of the preset temperature interval, after the opening degree of the electronic expansion valve is adjusted according to the superheat degree of the indoor heat exchanger, at least one of the following steps is further executed:
controlling a fan of the indoor unit to operate according to an automatic windshield;
and adjusting the running frequency of the compressor according to the target evaporation temperature of the air conditioner.
The control of the fan of the indoor unit to operate according to the automatic windshield means that the fan of the indoor unit is controlled to operate according to the lowest wind speed gear. Because the air conditioner needs to dehumidify according to the normal-temperature dehumidification control at the moment, namely, air is not required to be supplied outwards, namely before dehumidification is carried out according to the normal-temperature dehumidification control, if a fan of the air conditioner is in other set wind speed gears, the lowest wind speed gear is adjusted, and if the fan is in the low wind speed gear, adjustment is not required.
The air conditioner comprises a plurality of indoor units, namely the air conditioner is a multi-connected air conditioner, the target evaporation temperature is a weighted average value of evaporation temperatures of indoor heat exchangers of all started indoor units, for example, when three indoor units, namely the indoor unit 1, the indoor unit 2 and the indoor unit 3 are currently started, evaporation temperatures of the indoor heat exchangers of the three indoor units are respectively X1, X2 and X3, then the weighted average value of the evaporation temperatures of the three currently started indoor units is (A X1+ B X2+ C X3)/3, wherein A is a weight value of the indoor unit 1, B is a weight value of the indoor unit 2, and C is a weight value of the indoor unit 3. When the air conditioner is controlled to dehumidify according to the normal-temperature dehumidification control, the operation frequency of the compressor is adjusted according to the target evaporation temperature so as to further perform normal-temperature dehumidification.
As shown in fig. 4, in the third embodiment of the present application, the following steps are further included after step S220:
step S240: and opening the bypass electromagnetic valve.
As shown in fig. 5, fig. 5 is a schematic view of an air conditioner system, in which 10 is a compressor, 11 is an oil separator, 12 is a bypass solenoid valve, 13 is a quick oil return capillary tube, 14 is an oil return capillary tube, 15 is a four-way valve, 16 is a condenser, 17 is an outdoor unit electronic expansion valve, 18 is an indoor unit electronic expansion valve, and 19 is an evaporator. The air conditioner comprises an outdoor unit and at least one indoor unit, wherein the outdoor unit of the air conditioner is provided with an oil return flow path communicated with an exhaust port and an air return port of the compressor 10, and the oil return flow path is provided with a bypass electromagnetic valve 12, wherein a closed loop formed by the exhaust port of the compressor 10, the oil separator 11, the bypass electromagnetic valve 12, the quick oil return capillary tube 13 and the air return port of the compressor 10 is the oil return flow path, and similarly, the closed loop formed by the exhaust port of the compressor, the oil separator 11, the oil return capillary tube 14 and the air return port of the compressor 10 is the oil return flow path.
In this embodiment, during low-temperature dehumidification by controlling the air conditioner in a low-temperature environment, after the opening of the electronic expansion valve of the indoor unit is adjusted to the target opening and lasts for a preset duration, the return air temperature of the compressor may be increased slowly due to a low ambient temperature, which may result in a slow increase of the superheat degree of the compressor, and thus is not beneficial to the reliability of the operation of the compressor, based on which, after step S220 is executed or while step S220 is executed, the bypass electromagnetic valve on the return air flow path is opened, the refrigerant flowing into the indoor unit may be divided by opening the bypass electromagnetic valve, that is, a part of the refrigerant flowing out of the exhaust port of the compressor may flow back to the compressor through the oil separator, the bypass electromagnetic valve, the return air capillary tube, and the return air port of the compressor, and another part of the refrigerant enters the indoor unit. So can increase the return-air temperature of the return-air inlet of compressor fast through the partly refrigerant of bypass solenoid valve backward flow to the compressor, namely pass through bypass solenoid valve backward flow to the muffler with compressor exhaust refrigerant promptly for the superheat degree of compressor improves, thereby has avoided the compressor to break down, is favorable to improving the reliability of compressor operation.
As shown in fig. 6, in a fourth embodiment of the present application, an air conditioner control method of the present application includes the steps of:
step S250: and when the proportion of the indoor units with the indoor temperatures within the preset temperature interval in all the started indoor units is greater than or equal to the set proportion, reducing the target evaporation temperature of the air conditioner.
Step S260: and adjusting the running frequency of the compressor according to the reduced target evaporation temperature.
In this embodiment, when the air conditioner includes a plurality of indoor units, the indoor temperature corresponding to each indoor unit is obtained, and if the ratio of the indoor units with indoor temperatures within a preset temperature interval to all the opened indoor units is greater than the set ratio, the target evaporation temperature of the air conditioner is reduced. For example, if 5 indoor units are turned on and the set ratio is 1/5, where 2 indoor units have an indoor temperature within a preset temperature range, and the ratio of 2 indoor units having an indoor temperature within the preset temperature range to 5 turned on indoor units is 2/5, the target evaporation temperature of the air conditioner is lowered.
The reduced target evaporation temperature can be obtained by correcting the target evaporation temperature according to the correction value, namely, the reduced target evaporation temperature can be obtained by subtracting the target evaporation temperature from the correction value, namely, the reduced target evaporation temperature is less than the target evaporation temperature. Then, the air conditioner is controlled to operate according to the reduced target evaporation temperature, the air conditioner operates according to the reduced target evaporation temperature, and the dehumidification effect is improved. The target evaporation temperature is a weighted average of evaporation temperatures of all the indoor heat exchangers of the turned-on indoor units, in order to enable the evaporation temperature of the indoor heat exchangers to reach the target evaporation temperature as soon as possible, the operating frequency of the compressor needs to be increased to increase the refrigerant entering the indoor heat exchangers, and after the evaporation temperature reaches the target evaporation temperature, the dehumidification effect is improved.
Further, step S250 is followed by: acquiring the number of indoor units with indoor temperature within a preset temperature interval, and executing step S260 when the number is greater than or equal to the preset number.
Specifically, when the air conditioner includes a plurality of indoor units, the indoor temperature corresponding to each indoor unit is obtained, then the number of indoor units having an indoor temperature within a preset temperature range is obtained, and if the number is greater than or equal to the preset number, step S260 is executed. Assuming that the preset number is 1, that is, as long as the corresponding indoor temperature of 1 indoor unit is in the preset interval, it means that only the indoor unit performs low-temperature dehumidification, and the operating frequency of the compressor is adjusted according to the reduced target evaporation temperature.
It should be noted that after the operating frequency of the compressor is increased, the amount of the refrigerant discharged from the compressor is increased, and when the bypass solenoid valve is opened, the amount of the refrigerant flowing back to the compressor through the oil return path is also increased. The refrigerant temperature of the refrigerant flowing back to the compressor through the oil return flow path is higher, and the refrigerant temperature of the refrigerant flowing back to the outlet of the indoor heat exchanger is lower, so that when the refrigerant and the refrigerant meet at the air return port of the compressor, the refrigerant flowing out of the outlet of the indoor heat exchanger can reduce the refrigerant temperature of the refrigerant flowing back to the compressor through the oil return flow path, the return air temperature is reduced, namely the superheat degree of the compressor is reduced, the phenomenon that the compressor breaks down due to overhigh superheat degree of the compressor is avoided, and the reliability of the operation of the compressor is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An air conditioner control method, characterized by comprising:
detecting an instruction for switching to a dehumidification mode, and controlling the air conditioner to perform refrigeration operation;
adjusting the opening degree of an electronic expansion valve of an indoor unit of the air conditioner to a target opening degree and lasting for a preset time;
and adjusting the opening degree of the electronic expansion valve according to the superheat degree of the indoor heat exchanger.
2. The method as claimed in claim 1, wherein the step of controlling the air conditioner to perform cooling operation after detecting the command for switching to the initial mode further comprises:
acquiring the indoor temperature of the air conditioner;
when the indoor temperature is within a preset temperature range, the step of adjusting the opening degree of an electronic expansion valve of an indoor unit of the air conditioner to a target opening degree and lasting for a preset time is executed;
and when the indoor temperature is higher than the maximum value of the preset temperature interval, executing the step of adjusting the opening degree of the electronic expansion valve according to the superheat degree of the indoor heat exchanger.
3. The method as claimed in claim 2, wherein after the step of adjusting the opening degree of the electronic expansion valve according to the degree of superheat of the indoor heat exchanger is performed when the indoor temperature is greater than the maximum value of the preset temperature interval, further comprising:
controlling a fan of the indoor unit to operate according to an automatic windshield; and/or the presence of a gas in the gas,
and adjusting the running frequency of the compressor according to the target evaporation temperature of the air conditioner.
4. The method as claimed in claim 2, wherein after the step of adjusting the opening degree of the electronic expansion valve according to the superheat degree of the heat exchanger of the indoor unit, further comprising:
acquiring the indoor temperature of the air conditioner;
and when the indoor temperature is lower than the minimum value of the preset temperature interval, closing the indoor unit and/or closing the electronic expansion valve.
5. The method as claimed in claim 1, wherein the outdoor unit of the air conditioner is provided with an oil return flow path communicated with the discharge port and the return port of the compressor, and the oil return flow path is provided with a bypass solenoid valve; after the step of adjusting the opening degree of the electronic expansion valve of the indoor unit of the air conditioner to the target opening degree and continuing for the preset time, the method further comprises the following steps:
and opening the bypass electromagnetic valve.
6. The method of claim 1, wherein the step of adjusting the opening degree of an electronic expansion valve of an indoor unit of the air conditioner to a target opening degree for a preset time period is followed by further comprising:
when the proportion of indoor units with indoor temperatures within a preset temperature interval in all started indoor units is larger than or equal to a set proportion, reducing the target evaporation temperature of the air conditioner;
and adjusting the running frequency of the compressor according to the reduced target evaporation temperature.
7. The method as claimed in claim 6, wherein the step of lowering the target evaporating temperature of the air conditioner comprises:
acquiring a correction value;
and reducing the target evaporation temperature according to the correction value.
8. The method as claimed in claim 6, wherein the step of lowering the target evaporating temperature of the air conditioner is followed by further comprising:
acquiring the number of indoor units with indoor temperature within a preset temperature interval;
and when the number is greater than or equal to a preset number, executing the step of adjusting the operating frequency of the compressor according to the reduced target evaporation temperature.
9. An air conditioner, comprising: a memory, a processor, and an air conditioner control program stored on the memory and executable on the processor, the air conditioner control program when executed by the processor implementing the steps of the air conditioner control method as recited in any one of claims 1-8.
10. A storage medium having stored thereon an air conditioner control program, which when executed by a processor, implements the steps of the air conditioner control method of any one of claims 1-8.
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| CN113834201B (en) | 2022-12-02 |
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