CN114738927B - Air conditioner control method, controller, air conditioner and storage medium - Google Patents
Air conditioner control method, controller, air conditioner and storage medium Download PDFInfo
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- CN114738927B CN114738927B CN202210486259.6A CN202210486259A CN114738927B CN 114738927 B CN114738927 B CN 114738927B CN 202210486259 A CN202210486259 A CN 202210486259A CN 114738927 B CN114738927 B CN 114738927B
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- 238000000034 method Methods 0.000 title claims abstract description 65
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000004590 computer program Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 30
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 9
- 239000003507 refrigerant Substances 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 11
- 230000007423 decrease Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 230000001502 supplementing effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of an air conditioner, a controller, the air conditioner and a storage medium, wherein the control method of the air conditioner comprises the following steps: acquiring a first exhaust temperature of a compressor under the condition that the air conditioner is in a heating mode; when the first exhaust temperature is smaller than the target exhaust temperature, reducing the opening of the throttling device; after the first preset time, obtaining a second exhaust temperature of the compressor; when the second discharge temperature is less than the first discharge temperature, the loop switching device is turned off and/or the opening degree of the throttling device is increased so that the discharge temperature of the compressor reaches the target discharge temperature. In the technical scheme of the embodiment, under the condition that the compressor returns liquid in the process of adjusting the opening of the throttling device to enable the exhaust temperature to reach the target exhaust temperature, the problem of liquid carrying operation of the compressor can be avoided by effectively controlling the loop switching device and the throttling device, and the heating effect and the system stability of the air conditioner are effectively improved.
Description
Technical Field
The present invention relates to the field of air conditioners, and in particular, to a control method of an air conditioner, a controller, an air conditioner, and a storage medium.
Background
At present, in the heating operation process of the air conditioner, a mode of controlling the exhaust temperature of the compressor mainly adopts a fixed opening degree, and in the control mode, once the problem of liquid return of the compressor occurs, the operation state of the air conditioner cannot be timely adjusted, the compressor is easy to damage, or the phenomenon of liquid impact cannot be timely controlled, so that the operation of the air conditioner is abnormal, and the temperature of air outlet influences the thermal comfort.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the invention provides a control method of an air conditioner, a controller, the air conditioner and a storage medium, which can avoid the problem of liquid carrying operation of a compressor and effectively improve the heating effect and the system stability of the air conditioner.
An embodiment of a first aspect of the present invention provides a control method for an air conditioner, where the air conditioner includes a compressor, an indoor heat exchanger, a flash evaporator and an outdoor heat exchanger that are sequentially connected, where a throttling device is disposed between the outdoor heat exchanger and the flash evaporator, the compressor includes a first air return port and a second air return port, the first air return port is communicated with the outdoor heat exchanger, the second air return port is communicated with a gas phase outlet of the flash evaporator, and a loop switch device is disposed between the compressor and the flash evaporator; the method comprises the following steps:
acquiring a first exhaust temperature of the compressor under the condition that the air conditioner is in a heating mode;
when the first exhaust temperature is less than a target exhaust temperature, reducing the opening of the throttling device;
after the first preset time, obtaining a second exhaust temperature of the compressor;
and when the second exhaust temperature is smaller than the first exhaust temperature, closing the loop switching device and/or increasing the opening degree of the throttling device so as to enable the exhaust temperature of the compressor to reach the target exhaust temperature.
The air conditioner according to the embodiment of the first aspect of the invention has at least the following beneficial effects: in order to ensure the heating effect and the system stability of the compressor in the heating mode of the air conditioner, the exhaust temperature of the compressor during the operation needs to be kept at the target exhaust temperature, so that when the air conditioner is in the heating mode, the first exhaust temperature of the compressor is obtained, and when the first exhaust temperature is smaller than the target exhaust temperature, the exhaust temperature of the compressor is increased by reducing the opening of the throttling device, after a first preset time, the second exhaust temperature of the compressor is obtained, and when the second exhaust temperature is smaller than the first exhaust temperature, the condition that liquid return exists in a channel between the compressor of the air conditioner and the flash evaporator at the moment is indicated, the opening of the throttling device can be closed, so that the problem of liquid return of the compressor is prevented, and the exhaust temperature of the compressor can reach the target exhaust temperature. In the technical scheme of the embodiment, under the condition that the compressor returns liquid in the process of adjusting the opening of the throttling device to enable the exhaust temperature to reach the target exhaust temperature, the problem of liquid carrying operation of the compressor can be avoided by effectively controlling the loop switching device and the throttling device, and the heating effect and the system stability of the air conditioner are effectively improved.
In some embodiments, the method further comprises, after closing the circuit switching device and/or increasing the throttle opening when the second exhaust temperature is less than the first exhaust temperature:
After a second preset time, obtaining a third exhaust temperature of the compressor;
comparing the third exhaust temperature with the second exhaust temperature to obtain a temperature difference;
And controlling the throttling device and the loop switching device according to the temperature difference and a preset temperature difference threshold value so as to enable the exhaust temperature of the compressor to reach the target exhaust temperature.
In some embodiments, the controlling the throttling device and the loop switching device according to the temperature difference and a preset temperature difference threshold value includes:
and when the temperature difference is smaller than the temperature difference threshold, keeping the loop switch device closed, and increasing the opening of the throttling device so that the temperature difference is larger than or equal to the temperature difference threshold.
In some embodiments, the controlling the throttling device and the loop switching device according to the temperature difference and a preset temperature difference threshold value includes:
And when the temperature difference is greater than or equal to the temperature difference threshold, opening the loop switching device to keep the opening degree of the throttling device.
In some embodiments, after controlling the throttle device to reduce the opening degree when the first exhaust gas temperature is less than the target exhaust gas temperature, the method further includes:
after a third preset time, obtaining a fourth exhaust temperature of the compressor;
And when the fourth exhaust temperature is equal to the first exhaust temperature, reducing the opening degree of the throttling device.
In some embodiments, after closing the circuit switching device and increasing the throttle opening when the second exhaust temperature is less than the first exhaust temperature, the method further comprises:
Obtaining a fifth exhaust temperature of the compressor after a fourth preset time;
When the fifth exhaust gas temperature is greater than the target exhaust gas temperature, the opening degree of the throttle device is set to an initial opening degree.
In some embodiments, the method further comprises:
and when the second exhaust temperature is higher than the first exhaust temperature, keeping the loop switching device open, and increasing the opening degree of the throttling device so as to enable the exhaust temperature of the compressor to reach the target exhaust temperature.
An embodiment of a second aspect of the present invention provides a controller, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the control method of the air conditioner according to the first aspect when executing the computer program.
An embodiment of a third aspect of the present invention provides an air conditioner comprising a controller as described in the second aspect.
An embodiment of a fourth aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions for performing the control method of an air conditioner according to the first aspect.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a schematic diagram of a system architecture platform for executing a control method of an air conditioner according to an embodiment of the present invention;
Fig. 2 is a schematic structural view of an air conditioner for performing a control method of the air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating an improvement in efficiency of adjusting an exhaust temperature in a control method of an air conditioner according to an embodiment of the present invention;
Fig. 5 is a flowchart of a specific embodiment of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In the related art, in the heating operation process of the air conditioner, a mode of controlling the exhaust temperature of the compressor mainly adopts a fixed opening degree, and in the control mode, once the problem of liquid return of the compressor occurs, the air conditioner cannot adjust the operation state in time, so that the compressor is easy to damage, or the phenomenon of liquid impact cannot be controlled in time, so that the operation of the air conditioner is abnormal, and the temperature of air outlet influences the thermal comfort.
Based on the above, the embodiments of the present invention provide a control method of an air conditioner, a controller, an air conditioner, and a computer readable storage medium, where the control method of an air conditioner includes, but is not limited to, the following steps:
acquiring a first exhaust temperature of a compressor under the condition that the air conditioner is in a heating mode;
When the first exhaust temperature is smaller than the target exhaust temperature, reducing the opening of the throttling device;
after the first preset time, obtaining a second exhaust temperature of the compressor;
When the second discharge temperature is less than the first discharge temperature, the loop switching device is turned off and/or the opening degree of the throttling device is increased so that the discharge temperature of the compressor reaches the target discharge temperature.
According to the technical scheme of the embodiment of the invention, when the air conditioner is in the heating mode, the first exhaust temperature of the compressor is obtained, and when the first exhaust temperature is smaller than the target exhaust temperature, the opening of the throttling device is reduced to improve the exhaust temperature of the compressor, after the first preset time, the second exhaust temperature of the compressor is obtained, and when the second exhaust temperature is smaller than the first exhaust temperature, the condition that the liquid return problem exists in the compressor of the air conditioner at the moment is indicated, the loop switching device can be closed and/or the opening of the throttling device can be increased, so that the liquid return problem of the compressor is prevented, and the exhaust temperature of the compressor can reach the target exhaust temperature. In the technical scheme of the embodiment, when the opening of the throttling device is adjusted to enable the exhaust temperature to reach the target exhaust temperature, and the return liquid is generated by the compressor, the loop switch device and the throttling device are effectively controlled, so that the problem of liquid carrying operation of the compressor can be avoided, and the heating effect and the system stability of the air conditioner are effectively improved
Embodiments of the present invention will be further described below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a system architecture platform for executing a control method of an air conditioner according to an embodiment of the present invention.
The system architecture platform 1000 of an embodiment of the present invention includes one or more processors 1001 and a memory 1002, one processor 1001 and one memory 1002 being illustrated in fig. 1.
The processor 1001 and the memory 1002 may be connected by a bus or otherwise, which is illustrated in fig. 1 as a bus connection.
Memory 1002 is a non-transitory computer-readable storage medium that may be used to store non-transitory software programs as well as non-transitory computer-executable programs. In addition, the memory 1002 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some implementations, memory 1002 optionally includes memory 1002 remotely located relative to processor 1001, which may be connected to the system architecture platform 1000 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Those skilled in the art will appreciate that the device structure shown in FIG. 1 is not limiting of system architecture platform 1000 and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
In the system architecture platform 1000 shown in fig. 1, a processor 1001 may be used to invoke a defrosting control program for an external unit of an air conditioner stored in a memory 1002, thereby implementing a control method for the air conditioner.
Based on the hardware structure of the system architecture platform 1000 described above, various embodiments of the air conditioner of the present invention are presented.
Specifically, referring to fig. 2, the air conditioner according to the embodiment of the present invention includes, but is not limited to, a compressor 210, an indoor heat exchanger 220, a flash evaporator 230 and an outdoor heat exchanger 240 connected in sequence, wherein a throttling device 260 is disposed between the outdoor heat exchanger 240 and the flash evaporator 230, the compressor 210 includes a first air return port and a second air return port, the first air return port is in communication with the outdoor heat exchanger 240, the second air return port is in communication with a gas phase outlet of the flash evaporator 230, a circuit switching device 250 is disposed between the compressor 210 and the flash evaporator 230, a controller (not shown in the figure) and a temperature sensor (not shown in the figure) for detecting an exhaust temperature of the compressor 210 are further disposed, the controller is in communication with the compressor 210, the flash evaporator 230, the throttling device 260, the circuit switching device 250 and the temperature sensor (not shown in the figure), and the controller may include a processor 1001 and a memory 1002 as shown in fig. 1.
It should be noted that, the indoor heat exchanger 220 may be an evaporator, or may be another device having a heat exchange capability, which is not specifically limited in this embodiment. It is understood that the indoor heat exchanger 220 serves as an evaporation end for heat absorption of the refrigerant in the cooling and defrosting mode, and serves as a condensation end for heat dissipation of the refrigerant in the heating mode.
The outdoor heat exchanger 240 may be an evaporator, or may be other devices having heat exchange capability, which is not particularly limited in this embodiment. It is understood that the outdoor heat exchanger 240 serves as a condensing end for cooling a refrigerant in the cooling and defrosting mode, and serves as an evaporating end for absorbing heat of the refrigerant in the heating mode.
The throttle device 260 may be an electronic expansion valve, or may be another throttle device 260 capable of adjusting the opening degree, and the present embodiment is not particularly limited.
The circuit switching device 250 may be a solenoid valve, a two-way valve, or other devices capable of controlling the opening and closing of the pipe, and the embodiment is not particularly limited.
It should be noted that, the air conditioner may further be provided with a refrigerant pipeline switching module 270, the controller may control the heating mode and the cooling mode switching of the air conditioner through the refrigerant pipeline switching module 270, and the refrigerant pipeline switching module 270 may be a four-way valve or a five-way valve according to different setting conditions of the refrigerant pipeline, which is not limited in this embodiment.
Based on the above-mentioned hardware structure of the air conditioner, various embodiments of the control method of the air conditioner are provided.
As shown in fig. 3, fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention. The control method of the air conditioner according to the embodiment of the invention includes, but is not limited to, step S100, step S200, step S300 and step S400.
Step S100, when the air conditioner is in a heating mode, a first exhaust temperature of the compressor is obtained.
Specifically, after the air conditioner starts a heating mode to operate, the controller calculates a target exhaust temperature of the compressor in the working environment according to a preset program of the air conditioner, then adjusts an opening of an electronic expansion valve between the outdoor heat exchanger and the flash evaporator to an initial opening, and opens a switching device between the compressor and the flash evaporator, the exhaust temperature can be gradually increased and continuously approaches the preset target temperature, and the exhaust temperature of the compressor is detected through a temperature sensor to obtain a first exhaust temperature of the compressor. It should be noted that, the preset program for calculating the target exhaust temperature of the compressor is set according to different structures and parameters of the air conditioner, and the preset program is not specifically limited in this embodiment.
In step S200, when the first exhaust temperature is less than the target exhaust temperature, the throttle opening is reduced.
Specifically, when the first discharge temperature obtained by the temperature sensor is less than the target discharge temperature, then the discharge temperature of the compressor does not reach the standard at this time, and it is necessary to reduce the flow rate of the refrigerant between the flash evaporator and the outdoor heat exchanger by reducing the opening degree of the throttle device, so as to increase the discharge temperature of the compressor.
Step S300, after a first preset time, obtaining a second exhaust temperature of the compressor;
Specifically, after the air conditioner keeps the opening degree of the throttling device after being reduced to run for a first preset time, the compressed exhaust temperature is detected, the second exhaust temperature of the compressor is obtained through the temperature sensor, and the throttling device and the loop switching device can be controlled according to the change of the second exhaust temperature relative to the first exhaust temperature.
In step S400, when the second exhaust temperature is less than the first exhaust temperature, the circuit switching device is turned off and/or the throttle opening is increased to make the exhaust temperature of the compressor reach the target exhaust temperature.
Specifically, when the detection result is that the second exhaust temperature is smaller than the first exhaust temperature, that is, the exhaust temperature of the compressor decreases along with the decrease of the opening degree of the throttling device, which indicates that the compressor of the air conditioner has a liquid return problem, the loop switching device may be turned off, or the opening degree of the throttling device may be increased, or the loop switching device may be turned off and the opening degree of the throttling device may be increased, so that the compressor avoids continuous liquid carrying operation, and the exhaust temperature of the compressor may reach the target exhaust temperature by adjusting the opening degree of the throttling device. In the technical scheme of the embodiment, under the condition that the compressor returns liquid in the process of adjusting the opening of the throttling device to enable the exhaust temperature to reach the target exhaust temperature, the problem of liquid carrying operation of the compressor can be avoided by effectively controlling the loop switching device and the throttling device, and the heating effect and the system stability of the air conditioner are effectively improved.
In an embodiment, when the detection result is that the second exhaust temperature is smaller than the first exhaust temperature, that is, the exhaust temperature of the compressor decreases along with the decrease of the opening degree of the throttling device, which indicates that the compressor of the air conditioner has a liquid return problem, then the loop switch device on the loop between the compressor and the flash evaporator can be closed at this time, so that the compressor avoids continuous liquid-carrying operation, and because the loop between the compressor and the flash evaporator is closed by the switch device, the exhaust temperature of the compressor is mainly influenced by the throttling device and the outdoor heat exchanger at this time, the opening degree of the throttling device can be increased, so that the refrigerant flowing into the outdoor heat exchanger increases, and the exhaust temperature of the compressor can be accelerated to rise, so that the exhaust temperature of the compressor reaches the target exhaust temperature.
In an embodiment, when the detection result is that the second exhaust temperature is smaller than the first exhaust temperature, that is, the exhaust temperature of the compressor decreases along with the decrease of the opening degree of the throttling device, which indicates that the compressor of the air conditioner has a liquid return problem, then a loop switch device on a communication pipeline between the compressor and the flash evaporator can be closed at this time, so that the compressor can avoid continuous liquid carrying operation, and the opening degree of the throttling device is maintained, and the exhaust temperature of the compressor can also be increased and reach the target exhaust temperature.
In an embodiment, when the detection result is that the second exhaust temperature is smaller than the first exhaust temperature, that is, the exhaust temperature of the compressor decreases along with the decrease of the opening of the throttling device, which indicates that the compressor of the air conditioner has a liquid return problem, then the opening of the throttling device can be increased, so that the content of liquid refrigerant in the air supplementing process of the flash evaporator to the compressor can be reduced or stopped, and the exhaust temperature of the compressor can be increased and reach the target exhaust temperature while the continuous liquid carrying operation of the compressor is avoided.
In the embodiment of steps S100 to S400, in order to ensure the heating effect and the system stability of the compressor in the heating mode of the air conditioner, the exhaust temperature of the compressor during operation needs to be kept at the target exhaust temperature, so, in the case that the air conditioner is in the heating mode, the first exhaust temperature of the compressor is obtained, when the first exhaust temperature is smaller than the target exhaust temperature, the opening of the throttling device is reduced to increase the exhaust temperature of the compressor, after the third preset time, the fourth exhaust temperature is obtained, if the fourth exhaust temperature is equal to the first exhaust temperature, the opening of the current throttling device cannot be increased, then the opening of the throttling device needs to be continuously reduced, after the first preset time, the second exhaust temperature of the compressor is obtained, and when the second exhaust temperature is smaller than the first exhaust temperature, it is indicated that a liquid return condition exists in a channel between the compressor of the air conditioner and the flash evaporator at this time, then the loop switch device can be closed and/or the opening of the throttling device can be increased to prevent the problem of liquid return of the compressor, and the exhaust temperature of the compressor can reach the target exhaust temperature of the compressor. In the technical scheme of the embodiment, under the condition that the compressor returns liquid in the process of adjusting the opening of the throttling device to enable the exhaust temperature to reach the target exhaust temperature, the problem of liquid carrying operation of the compressor can be avoided by effectively controlling the loop switching device and the throttling device, and the heating effect and the system stability of the air conditioner are effectively improved.
After the first preset time, if the second exhaust temperature is greater than the first exhaust temperature, the exhaust temperature of the compressor needs to be reduced, at this time, the circuit switching device is kept open, and the opening of the throttle device is increased so that the exhaust temperature of the compressor reaches the target exhaust temperature.
It should be noted that, the first preset time may be set according to a control requirement of the air conditioner, which is not specifically limited in this embodiment.
Referring to fig. 4, after step S400, the method includes, but is not limited to, the following steps S410, S420, and S430:
Step S410, after a second preset time, obtaining a third exhaust temperature of the compressor;
step S420, comparing the third exhaust temperature with the second exhaust temperature to obtain a temperature difference;
step S430, controlling the throttling device and the loop switching device according to the temperature difference and a preset temperature difference threshold value so as to enable the exhaust temperature of the compressor to reach the target exhaust temperature.
Specifically, after the operation of closing the circuit switching device and/or increasing the opening degree of the throttling device, before the exhaust temperature of the compressor reaches the target exhaust temperature, in order to improve the exhaust temperature heating efficiency of the compressor, the exhaust temperature of the compressor can quickly reach the target exhaust temperature, after a second preset time, a third exhaust temperature of the compressor is obtained through a temperature sensor, then the third exhaust temperature is calculated with a second exhaust temperature difference value, a temperature difference value is obtained, and the throttling device and the circuit switching device are controlled according to a comparison result of the temperature difference value and a preset temperature difference threshold value, so that the exhaust temperature of the compressor quickly reaches the target exhaust temperature.
In an embodiment, when the temperature difference is greater than or equal to the temperature difference threshold, the exhaust temperature lifting speed of the compressor has reached the regulation requirement, and the opening of the throttling device may not be regulated, but only the loop switching device is required to be opened, so that the exhaust temperature lifting speed of the compressor may be effectively increased, and the exhaust temperature of the compressor may reach the target exhaust temperature rapidly.
In an embodiment, when the temperature difference is smaller than the temperature difference threshold, it indicates that the exhaust temperature lifting speed of the compressor does not reach the regulation requirement, at this time, the loop switch device may be kept closed, and the opening of the throttling device is increased, by increasing the refrigerant flow of the outdoor fan, the temperature difference is made to be greater than or equal to the temperature difference threshold, so as to achieve the effect of increasing the exhaust temperature lifting speed of the compressor, and enable the exhaust temperature of the compressor to reach the target exhaust temperature quickly.
The temperature difference threshold may be set according to a temperature increase requirement of the compressor of the air conditioner, and the embodiment is not particularly limited.
It should be noted that, the second preset time may be set according to a control requirement of the air conditioner, which is not specifically limited in this embodiment.
Referring to fig. 5, fig. 5 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present invention. The control method of the air conditioner according to the embodiment of the present invention includes, but is not limited to, step S510, step S520, step S530 and step S540, step S550, step S560, step S570, step S580 and step S590.
Step S510, starting a heating mode of the air conditioner, and calculating a target exhaust temperature of the compressor according to the current environment temperature condition and running condition of the air conditioner by a preset program;
Step S520, opening an electromagnetic valve of the air supplementing flow path, and adjusting an electronic expansion valve according to the target exhaust temperature so as to enable the temperature of the compressor to reach the target exhaust temperature;
Step S530, in the process of adjusting the electronic expansion valve, determining whether the following conditions are satisfied: the opening degree of the electronic expansion valve at the previous moment is smaller than or equal to the opening degree of the current electronic expansion valve, the current exhaust temperature is smaller than the exhaust temperature at the previous moment, the difference value between the indoor temperature at the previous moment and the indoor temperature at the current moment is smaller than or equal to an indoor temperature difference threshold value, and the difference value between the outdoor temperature at the previous moment and the outdoor temperature at the current moment is smaller than or equal to an outdoor temperature difference threshold value; if yes, go to step S540, if no, go to step S520;
Step S540, closing the electromagnetic valve of the air supplementing flow path, increasing the unit opening of the electronic expansion valve, and running for unit time;
Step S550, judging whether the temperature difference between the current exhaust temperature and the exhaust temperature at the previous moment is more than or equal to a temperature difference threshold; if yes, go to step S560, if no, go to step S540;
Step S560, opening the electromagnetic valve of the air supplementing flow path and running for unit time;
step S570, judging whether the current exhaust temperature is equal to the target exhaust temperature; if yes, go to step S580, if not, go to step S520;
Step S580, the opening degree adjustment process of the electronic expansion valve is completed and the operation is maintained.
In this embodiment, in the heating mode of the air conditioner, by detecting the exhaust temperature of the compressor in real time, according to the change condition of the exhaust temperature of the compressor, the opening and closing of the solenoid valve of the air supplementing flow path are controlled, so that the continuous liquid return operation of the compressor can be avoided, and meanwhile, the opening of the electronic expansion valve is adjusted according to the change condition of the exhaust temperature of the compressor, so that the exhaust temperature of the compressor can be efficiently adjusted to the target exhaust temperature, and the heating effect and the system stability of the air conditioner are effectively improved.
It should be noted that the unit time may be set according to the structure of the air conditioner and the actual situation of each device, and the embodiment is not particularly limited.
Note that the unit opening degree may be set according to the type and model of the electronic expansion valve, and the embodiment is not particularly limited.
Based on the above-described control method of the air conditioner, various embodiments of the controller, the air conditioner, and the computer-readable storage medium of the present invention are respectively presented below.
One embodiment of the present invention provides a controller including: a processor, a memory, and a computer program stored on the memory and executable on the processor.
The processor and the memory may be connected by a bus or other means.
It should be noted that, the controller in this embodiment may include a processor and a memory in the embodiment shown in fig. 1, which belong to the same inventive concept, so that the processor and the memory have the same implementation principle and beneficial effects, which are not described in detail herein.
The non-transitory software programs and instructions required to implement the control method of an air conditioner of the above-described embodiments are stored in the memory, and when executed by the processor, the control method of an air conditioner of the above-described embodiments is performed.
In addition, the embodiment of the invention also provides an air conditioner which comprises the controller.
It should be noted that, since the air conditioner according to the embodiment of the present invention has the controller according to the above embodiment, and the controller according to the above embodiment is capable of executing the control method of the air conditioner according to the above embodiment, specific implementation and technical effects of the air conditioner according to the embodiment of the present invention may refer to specific implementation and technical effects of the control method of the air conditioner according to any of the above embodiments.
The embodiment of the present invention also provides a computer-readable storage medium storing computer-executable instructions for performing the above-described control method of an air conditioner, for example, by one processor 1001 in fig. 1, which may cause the above-described one or more processors to perform the control method of an air conditioner in the above-described method embodiment, for example, to perform the above-described method steps S100 to S400 in fig. 3, the method steps S410 to S430 in fig. 4, and the method steps S510 to S580 in fig. 5.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network nodes. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer readable storage media (or non-transitory media) and communication media (or transitory media). The term computer-readable storage medium includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer-readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer-readable storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the above embodiment, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (10)
1. The control method of the air conditioner is characterized in that the air conditioner comprises a compressor, an indoor heat exchanger, a flash evaporator and an outdoor heat exchanger which are sequentially connected, wherein a throttling device is arranged between the outdoor heat exchanger and the flash evaporator, the compressor comprises a first air return port and a second air return port, the first air return port is communicated with the outdoor heat exchanger, the second air return port is communicated with a gas phase outlet of the flash evaporator, and a loop switching device is arranged between the compressor and the flash evaporator; the method comprises the following steps:
acquiring a first exhaust temperature of the compressor under the condition that the air conditioner is in a heating mode;
when the first exhaust temperature is less than a target exhaust temperature, reducing the opening of the throttling device;
after a first preset time, obtaining a second exhaust temperature of the compressor;
And when the second exhaust temperature is smaller than the first exhaust temperature, closing the loop switching device and increasing the opening degree of the throttling device so as to enable the exhaust temperature of the compressor to reach the target exhaust temperature.
2. The control method of an air conditioner according to claim 1, wherein when the second exhaust gas temperature is smaller than the first exhaust gas temperature, after closing the circuit switching device and increasing the throttle opening, the method further comprises:
After a second preset time, obtaining a third exhaust temperature of the compressor;
comparing the third exhaust temperature with the second exhaust temperature to obtain a temperature difference;
And controlling the throttling device and the loop switching device according to the temperature difference and a preset temperature difference threshold value so as to enable the exhaust temperature of the compressor to reach the target exhaust temperature.
3. The control method of an air conditioner according to claim 2, wherein the controlling the throttle device and the circuit switching device according to the temperature difference and a preset temperature difference threshold value includes:
and when the temperature difference is smaller than the temperature difference threshold, keeping the loop switch device closed, and increasing the opening of the throttling device so that the temperature difference is larger than or equal to the temperature difference threshold.
4. A control method of an air conditioner according to claim 2 or 3, wherein the controlling the throttle device and the circuit switching device according to the temperature difference value and a preset temperature difference threshold value includes:
And when the temperature difference is greater than or equal to the temperature difference threshold, opening the loop switching device to keep the opening degree of the throttling device.
5. The control method of an air conditioner according to claim 1, wherein when the first exhaust gas temperature is less than a target exhaust gas temperature, after controlling the throttle device to reduce the opening degree, the method further comprises:
after a third preset time, obtaining a fourth exhaust temperature of the compressor;
And when the fourth exhaust temperature is equal to the first exhaust temperature, reducing the opening degree of the throttling device.
6. The control method of an air conditioner according to claim 1, wherein after the second exhaust gas temperature is smaller than the first exhaust gas temperature, closing the circuit switching device and increasing the throttle opening, the method further comprises:
Obtaining a fifth exhaust temperature of the compressor after a fourth preset time;
When the fifth exhaust gas temperature is greater than the target exhaust gas temperature, the opening degree of the throttle device is set to an initial opening degree.
7. The control method of an air conditioner according to claim 1, further comprising:
and when the second exhaust temperature is higher than the first exhaust temperature, keeping the loop switching device open, and increasing the opening degree of the throttling device so as to enable the exhaust temperature of the compressor to reach the target exhaust temperature.
8. A controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control method of an air conditioner according to any one of claims 1 to 7 when executing the computer program.
9. An air conditioner comprising the controller of claim 8.
10. A computer-readable storage medium storing computer-executable instructions for performing the control method of the air conditioner according to any one of claims 1 to 7.
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