CN114738927A - Control method of air conditioner, controller, air conditioner and storage medium - Google Patents

Control method of air conditioner, controller, air conditioner and storage medium Download PDF

Info

Publication number
CN114738927A
CN114738927A CN202210486259.6A CN202210486259A CN114738927A CN 114738927 A CN114738927 A CN 114738927A CN 202210486259 A CN202210486259 A CN 202210486259A CN 114738927 A CN114738927 A CN 114738927A
Authority
CN
China
Prior art keywords
exhaust temperature
compressor
air conditioner
temperature
opening degree
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202210486259.6A
Other languages
Chinese (zh)
Other versions
CN114738927B (en
Inventor
张森
杨晓东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
GD Midea Air Conditioning Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GD Midea Air Conditioning Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202210486259.6A priority Critical patent/CN114738927B/en
Publication of CN114738927A publication Critical patent/CN114738927A/en
Application granted granted Critical
Publication of CN114738927B publication Critical patent/CN114738927B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • 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
    • 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

Landscapes

  • 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, the controller, the air conditioner and a storage medium, wherein the control method of the air conditioner comprises the following steps: under the condition that the air conditioner is in a heating mode, acquiring a first exhaust temperature of a compressor; when the first exhaust temperature is lower than the target exhaust temperature, reducing the opening degree of the throttling device; after the first preset time, acquiring a second exhaust temperature of the compressor; and when the second exhaust temperature is lower than the first exhaust temperature, closing the loop switch 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. In the technical scheme of this embodiment, in the in-process that the adjusting throttling gear aperture makes exhaust temperature reach target exhaust temperature, under the condition that the liquid back appears in the compressor, through effectively controlling return circuit switching device and throttling arrangement, can avoid the compressor to appear taking the problem of liquid operation to effectively improve the heating effect and the system stability of air conditioner.

Description

Control method of air conditioner, controller, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner, a controller, the air conditioner and a storage medium.
Background
At present, the air conditioner mainly adopts the mode of fixed aperture control to the exhaust temperature control of compressor in the heating operation process, and under this control mode, in case the compressor returns the liquid problem, the air conditioner can't in time adjust running state, causes the compressor to damage easily, perhaps because unable in time control liquid hits the phenomenon, leads to the air conditioner to operate unusually, and the hot travelling comfort of air-out temperature influence.
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 the first aspect of the invention provides a control method of an air conditioner, 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 return air port and a second return air port, the first return air port is communicated with the outdoor heat exchanger, the second return air 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 lower than the target exhaust temperature, reducing the opening degree of the throttling device;
after the first preset time, acquiring a second exhaust temperature of the compressor;
and when the second exhaust temperature is lower than the first exhaust temperature, closing the circuit 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 advantages: in the heating mode of the air conditioner, in order to ensure the heating effect and the system stability of the compressor, the exhaust temperature of the compressor during operation needs to be kept at a target exhaust temperature, therefore, under the condition that the air conditioner is in the heating mode, a first exhaust temperature of the compressor is obtained, when the first exhaust temperature is lower than the target exhaust temperature, the exhaust temperature of the compressor is improved by reducing the opening degree of the throttling device, after a first preset time, a second exhaust temperature of the compressor is obtained, when the second exhaust temperature is lower than the first exhaust temperature, the liquid return condition exists in a channel between the compressor and the flash evaporator of the air conditioner at the moment, the loop switching device can be closed and/or the opening degree of the throttling device can be increased, the problem of liquid return of the compressor can be prevented, and the exhaust temperature of the compressor can reach the target exhaust temperature. In the technical scheme of this embodiment, in the in-process that the adjusting throttling gear aperture makes exhaust temperature reach target exhaust temperature, under the condition that the liquid back appears in the compressor, through effectively controlling return circuit switching device and throttling arrangement, can avoid the compressor to appear taking the problem of liquid operation to effectively improve the heating effect and the system stability of air conditioner.
In some embodiments, after the second exhaust gas temperature is less than the first exhaust gas temperature, the circuit switching device is closed and/or the throttle device opening degree is increased, the method further comprises:
after a second preset time, acquiring a third exhaust temperature of the compressor;
comparing the third exhaust temperature with the second exhaust temperature to obtain a temperature difference value;
and controlling the throttling device and the loop switching device according to the temperature difference value 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, said controlling said throttling means and said circuit switching means according to said temperature difference value and a preset temperature difference threshold value comprises:
and when the temperature difference value is smaller than the temperature difference threshold value, keeping the loop switch device closed, and increasing the opening degree of the throttling device to enable the temperature difference value to be larger than or equal to the temperature difference threshold value.
In some embodiments, said controlling said throttling means and said circuit switching means according to said temperature difference value and a preset temperature difference threshold value comprises:
and when the temperature difference value is greater than or equal to the temperature difference threshold value, opening the loop switch device and keeping the opening degree of the throttling device.
In some embodiments, after controlling the throttle device to decrease the opening degree when the first exhaust temperature is less than a target exhaust temperature, the method further comprises:
after a third preset time, acquiring a fourth exhaust temperature of the compressor;
when the fourth exhaust temperature is equal to the first exhaust temperature, the throttle opening is decreased.
In some embodiments, after the second exhaust gas temperature is less than the first exhaust gas temperature, the circuit switching device is closed, and the throttle device opening degree is increased, the method further includes:
acquiring a fifth exhaust temperature of the compressor after a fourth preset time;
and when the fifth exhaust temperature is higher than the target exhaust temperature, setting the opening degree of the throttling device as 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 circuit switching device open, and increasing the opening degree of the throttling device to enable the exhaust temperature of the compressor to reach the target exhaust temperature.
In a second aspect, the present invention provides a controller, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the controller implements the control method of the air conditioner according to the first aspect.
In an embodiment of the third aspect of the invention, an air conditioner is provided, which includes the controller according to the second aspect.
A fourth aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions for performing the method of controlling 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 the 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 implementing a control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram 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 in adjusting the discharge air temperature in the control method of the air conditioner according to the embodiment of the present invention;
fig. 5 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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 ordinal numbers used herein for the components, such as "first," "second," etc., are used merely to distinguish between the objects described, and do not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
In the description of the present invention, unless otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
In the correlation technique, the air conditioner mainly adopts the mode of fixed aperture control to the exhaust temperature control of compressor in the heating operation in-process, and under this control mode, in case the compressor returns the liquid problem, the air conditioner can't in time adjust running state, causes the compressor to damage easily, perhaps because the liquid hammer phenomenon can't in time be controlled, leads to the air conditioner to operate unusually, and the air-out temperature influences thermal comfort.
Based on the above situation, an embodiment of the present invention provides a control method of an air conditioner, a controller, an air conditioner and a computer-readable storage medium, where the control method of the air conditioner includes, but is not limited to, the following steps:
under the condition that the air conditioner is in a heating mode, acquiring a first exhaust temperature of a compressor;
when the first exhaust temperature is lower than the target exhaust temperature, reducing the opening degree of the throttling device;
after the first preset time, acquiring a second exhaust temperature of the compressor;
and when the second exhaust temperature is lower than the first exhaust temperature, closing the loop switch 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.
According to the technical scheme of the embodiment of the invention, under the condition that the air conditioner is in the heating mode, the first exhaust temperature of the compressor is obtained, when the first exhaust temperature is lower than the target exhaust temperature, the opening degree of the throttling device is reduced to increase 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 lower than the first exhaust temperature, the liquid return problem of the compressor of the air conditioner at the moment is indicated, the loop switching device can be closed and/or the opening degree of the throttling device can be increased to prevent the liquid return problem of the compressor, and the exhaust temperature of the compressor can reach the target exhaust temperature. In the technical scheme of this embodiment, in the in-process that the adjusting throttle device aperture makes the exhaust temperature reach target exhaust temperature, under the condition that the liquid back appears in the compressor, through effectively controlling return circuit switching device and throttle device, can avoid the problem that the liquid operation appears in the compressor to effectively improve the heating effect and the system stability of air conditioner
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1, 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 the present invention includes one or more processors 1001 and a memory 1002, and fig. 1 illustrates one processor 1001 and one memory 1002 as an example.
The processor 1001 and the memory 1002 may be connected by a bus or other means, such as the bus shown in fig. 1.
The memory 1002, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer-executable programs. Further, 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 embodiments, memory 1002 may optionally include memory 1002 located remotely from processor 1001, which may be connected to 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 architecture illustrated in fig. 1 does not constitute a limitation of system architecture platform 1000, and may include more or fewer components than those illustrated, or some components in combination, or a different arrangement of components.
In the system architecture platform 1000 shown in fig. 1, the processor 1001 may be configured to call a defrosting control program of an external unit of an air conditioner stored in the memory 1002, so as to implement a control method of the air conditioner.
Based on the hardware structure of the system architecture platform 1000, various embodiments of the air conditioner of the present invention are proposed.
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 series, wherein, a throttling device 260 is arranged between the outdoor heat exchanger 240 and the flash evaporator 230, the compressor 210 comprises a first return gas port and a second return gas port, the first return gas port is communicated with the outdoor heat exchanger 240, the second return gas port is communicated with the gas phase outlet of the flash evaporator 230, a loop switching device 250 is arranged 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 the exhaust temperature of the compressor 210 are also arranged, the controller is communicatively coupled to the compressor 210, the flash vessel 230, the throttling device 260, the circuit switching device 250 and a temperature sensor (not shown), 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 other devices having heat exchange capability, and the present embodiment is not limited thereto. It can be understood that the indoor heat exchanger 220 serves as an evaporation end for absorbing heat from the refrigerant in the cooling and defrosting mode, and serves as a condensation end for dissipating heat from the refrigerant in the heating mode.
The outdoor heat exchanger 240 may be an evaporator, or may be other devices having a heat exchange capability, and the embodiment is not particularly limited thereto. It can be understood that the outdoor heat exchanger 240 serves as a condensing end in the cooling and defrosting mode to dissipate heat from the refrigerant, and serves as an evaporating end in the heating mode to absorb heat from the refrigerant.
The throttle device 260 may be an electronic expansion valve, or may be another throttle device 260 capable of adjusting the opening degree, and this embodiment is not particularly limited thereto.
It should be noted that 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 pipeline, and this embodiment is not limited to this.
It should be noted that the air conditioner may further be provided with a refrigerant pipeline switching module 270, the controller may control the switching between the heating mode and the cooling mode 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 specifically limited in this embodiment.
Based on the above module hardware structure of the air conditioner, various embodiments of the control method of the air conditioner of the present invention are proposed.
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 of the embodiment of the invention includes but is not limited to step S100, step S200, step S300 and step S400.
In step S100, a first discharge temperature of the compressor is obtained when the air conditioner is in a heating mode.
Specifically, after the air conditioner starts a heating mode to operate, the controller can calculate the target exhaust temperature of the compressor in the working environment according to a preset program of the air conditioner, then adjust the opening degree of an electronic expansion valve between the outdoor heat exchanger and the flash evaporator to an initial opening degree and open a switching device between the compressor and the flash evaporator, the exhaust temperature can be gradually increased and is continuously close to the preset target temperature, the exhaust temperature of the compressor is detected through the temperature sensor, and the first exhaust temperature of the compressor is obtained. It should be noted that the preset program for calculating the target discharge 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.
And S200, when the first exhaust temperature is lower than the target exhaust temperature, reducing the opening degree of the throttling device.
Specifically, when the first exhaust temperature acquired by the temperature sensor is lower than the target exhaust temperature, the exhaust temperature of the compressor does not reach the standard at the moment, and the opening degree of the throttling device needs to be reduced to reduce the flow rate of the refrigerant between the flash evaporator and the outdoor heat exchanger, so as to improve the exhaust temperature of the compressor.
Step S300, after first preset time, acquiring a second exhaust temperature of the compressor;
specifically, after the air conditioner is operated for a first preset time with the reduced opening degree of the throttling device maintained, the compressed exhaust temperature is detected, the second exhaust temperature of the compressor is obtained through the temperature sensor, and then the throttling device and the circuit switching device can be controlled according to the change of the second exhaust temperature relative to the first exhaust temperature.
And step S400, when the second exhaust temperature is lower 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.
Specifically, when the detection result is that the second exhaust temperature is lower than the first exhaust temperature, that is, the exhaust temperature of the compressor decreases 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 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 this embodiment, in the in-process that the adjusting throttling gear aperture makes exhaust temperature reach target exhaust temperature, under the condition that the liquid back appears in the compressor, through effectively controlling return circuit switching device and throttling arrangement, can avoid the compressor to appear taking the problem of liquid operation to effectively improve the heating effect and the system stability of air conditioner.
In an embodiment, when the detection result is that the second discharge temperature is lower than the first discharge temperature, that is, the discharge temperature of the compressor decreases 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 on the loop between the compressor and the flash evaporator may be turned off at this time, so that the compressor avoids continuous liquid carrying operation.
In an embodiment, when the detection result is that the second discharge temperature is lower than the first discharge temperature, that is, the discharge temperature of the compressor decreases 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 on the communication pipeline between the compressor and the flash evaporator may be closed at this time, so that the compressor avoids continuous liquid-carrying operation, the opening degree of the throttling device is maintained, and the discharge temperature of the compressor can also be increased and reach the target discharge temperature.
In an embodiment, when the detection result is that the second exhaust temperature is lower than the first exhaust temperature, that is, the exhaust temperature of the compressor is reduced 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 opening degree of the throttling device can be increased at this time, so that the content of a liquid refrigerant in the process of supplying air to the compressor by the flash evaporator can be reduced or stopped, and the exhaust temperature of the compressor can be increased and reach the target exhaust temperature while the compressor is kept in liquid-carrying operation.
In the embodiments of steps S100 to S400, in the heating mode of the air conditioner, in order to ensure the heating effect and the system stability of the compressor, the discharge temperature of the compressor during operation needs to be maintained at the target discharge temperature, therefore, in the case that the air conditioner is in the heating mode, the first discharge temperature of the compressor is obtained, when the first discharge temperature is less than the target discharge temperature, the discharge temperature of the compressor is increased by decreasing the opening degree of the throttling device, after a third preset time, the fourth discharge temperature is obtained, if the fourth discharge temperature is equal to the first discharge temperature, the current opening degree of the throttling device cannot increase the discharge temperature of the compressor, the opening degree of the throttling device needs to be continuously decreased, after the first preset time, the second discharge temperature of the compressor is obtained, when the second discharge temperature is less than the first discharge temperature, it indicates that there is a liquid return condition in the passage between the compressor and the flash evaporator of the air conditioner at this time, the circuit switching device may be closed and/or the throttle opening degree may be increased to prevent the problem of the liquid returning of the compressor and enable the discharge temperature of the compressor to reach the target discharge temperature. In the technical scheme of this embodiment, in the in-process that the adjusting throttling gear aperture makes exhaust temperature reach target exhaust temperature, under the condition that the liquid back appears in the compressor, through effectively controlling return circuit switching device and throttling arrangement, can avoid the compressor to appear taking the problem of liquid operation to effectively improve the heating effect and the system stability of air conditioner.
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, and at this time, the circuit switching device is kept open, and the opening degree of the throttling 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, and this embodiment does not specifically limit this.
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, acquiring a third exhaust temperature of the compressor;
step S420, comparing the third exhaust temperature with the second exhaust temperature to obtain a temperature difference value;
and step S430, controlling the throttling device and the loop switching device according to the temperature difference value 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 and enable the exhaust temperature of the compressor to quickly reach the target exhaust temperature, after a second preset time, a third exhaust temperature of the compressor is obtained through the temperature sensor, then the third exhaust temperature and the second exhaust temperature are calculated to obtain a temperature difference value, and the throttling device and the circuit switching device are controlled according to the 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 increase speed of the compressor reaches the regulation and control requirement, and the exhaust temperature increase speed of the compressor can be effectively increased only by opening the loop switch device without adjusting the opening degree of the throttling device, so that the exhaust temperature of the compressor can quickly reach the target exhaust temperature.
In an embodiment, when the temperature difference is smaller than the temperature difference threshold, it indicates that the exhaust temperature increase speed of the compressor does not meet the regulation requirement, at this time, the loop switch device may be kept closed, the opening degree of the throttling device is increased, and the temperature difference is greater than or equal to the temperature difference threshold by increasing the refrigerant flow of the outdoor fan, so as to achieve the effect of increasing the exhaust temperature increase speed of the compressor, and enable the exhaust temperature of the compressor to quickly reach the target exhaust temperature.
It should be noted that the temperature difference threshold may be set according to a temperature increase requirement of a compressor of the air conditioner, and this embodiment is not particularly limited thereto.
It should be noted that the second preset time may be set according to the control requirement of the air conditioner, and this embodiment does not specifically limit this.
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 method for controlling the air conditioner according to the embodiment of the present invention includes, but is not limited to, step S510, step S520, step S530, 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 through a preset program according to the current environment temperature condition and the running condition of the air conditioner;
step S520, opening the electromagnetic valve of the air supply flow path, and adjusting the electronic expansion valve according to the target exhaust temperature 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 less than or equal to the opening degree of the current electronic expansion valve, the current exhaust temperature is less 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 less 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 less than or equal to an outdoor temperature difference threshold value; if yes, go to step S540, otherwise go to step S520;
step S540, closing the electromagnetic valve of the air supply flow path, increasing one unit opening degree of the electronic expansion valve, and operating for a unit time;
step S550, judging whether the temperature difference value between the current exhaust temperature and the exhaust temperature at the previous moment is larger than or equal to a temperature difference threshold value; if yes, go to step S560, otherwise go to step S540;
step S560, opening the electromagnetic valve of the air supply flow path and operating for unit time;
step S570, determining whether the current exhaust temperature is equal to the target exhaust temperature; if yes, go to step S580, otherwise go to step S520;
in step S580, the opening degree adjustment process of the electronic expansion valve is completed and the operation is maintained.
In the embodiment, in the heating mode of the air conditioner, the exhaust temperature of the compressor is detected in real time, the opening and closing of the electromagnetic valve of the air replenishing flow path are controlled according to the variation condition of the exhaust temperature of the compressor, the continuous liquid return work of the compressor can be avoided, meanwhile, the opening degree of the electronic expansion valve is adjusted according to the variation condition of the exhaust temperature of the compressor, 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 this embodiment is not particularly limited thereto.
The unit opening degree may be set according to the type and model of the electronic expansion valve, and this embodiment is not particularly limited thereto.
Based on the control method of the air conditioner described above, various embodiments of the controller, the air conditioner, and the computer-readable storage medium of the present invention are separately set forth 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 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 as in the embodiment shown in fig. 1, both belong to the same inventive concept, and therefore both have the same implementation principle and beneficial effect, and are not described in detail herein.
The non-transitory software programs and instructions required to implement the control method of the air conditioner of the above-described embodiment are stored in the memory, and when executed by the processor, the control method of the air conditioner of the above-described embodiment is performed.
In addition, the embodiment of the invention also provides an air conditioner, which comprises the controller.
It is to be noted that, since the air conditioner according to the embodiment of the present invention has the controller according to the above-described embodiment, and the controller according to the above-described embodiment is capable of executing the control method according to the above-described embodiment, the specific implementation and technical effects of the air conditioner according to the embodiment of the present invention may refer to the specific implementation and technical effects of the control method according to any one of the above-described embodiments.
Also provided in an embodiment of the present invention is a computer-readable storage medium, which stores computer-executable instructions for executing the method for controlling an air conditioner, for example, executed by one processor 1001 in fig. 1, and causing the one or more processors to execute the method for controlling an air conditioner in the above-described method embodiment, for example, execute the 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 described above.
The above-described embodiments of the apparatus are merely illustrative, and the units illustrated as separate components may or may not be physically separate, 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 the present embodiment.
One 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 is well known to those of ordinary skill 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. In addition, 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 as known to those skilled in the art.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the 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 lower than the target exhaust temperature, reducing the opening degree of the throttling device;
after the first preset time, acquiring a second exhaust temperature of the compressor;
and when the second exhaust temperature is lower 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.
2. The control method of an air conditioner according to claim 1, characterized in that after the second exhaust gas temperature is less than the first exhaust gas temperature, the circuit switching device is closed and/or the throttle device opening degree is increased, the method further comprises:
after a second preset time, acquiring a third exhaust temperature of the compressor;
comparing the third exhaust temperature with the second exhaust temperature to obtain a temperature difference value;
and controlling the throttling device and the loop switching device according to the temperature difference value 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 said controlling said throttle means and said circuit switching means according to said temperature difference value and a preset temperature difference threshold value comprises:
and when the temperature difference value is smaller than the temperature difference threshold value, keeping the loop switch device closed, and increasing the opening degree of the throttling device to enable the temperature difference value to be larger than or equal to the temperature difference threshold value.
4. The control method of an air conditioner according to claim 2 or 3, wherein said controlling the throttle means and the circuit switching means according to the temperature difference value and a preset temperature difference threshold value comprises:
and when the temperature difference value is greater than or equal to the temperature difference threshold value, opening the loop switch device and keeping the opening degree of the throttling device.
5. The control method of an air conditioner according to claim 1, characterized in that after controlling the throttle device to reduce the opening degree when the first exhaust gas temperature is less than a target exhaust gas temperature, the method further comprises:
after a third preset time, acquiring a fourth exhaust temperature of the compressor;
when the fourth exhaust temperature is equal to the first exhaust temperature, the throttle opening is decreased.
6. The control method of an air conditioner according to claim 1, said method further comprising, after said second exhaust gas temperature is less than said first exhaust gas temperature, said circuit switching device is closed, and said throttle device opening degree is increased:
acquiring a fifth exhaust temperature of the compressor after a fourth preset time;
and when the fifth exhaust temperature is higher than the target exhaust temperature, setting the opening degree of the throttling device as an initial opening degree.
7. The control method of an air conditioner according to claim 1, characterized in that the method further comprises:
and when the second exhaust temperature is higher than the first exhaust temperature, keeping the circuit switching device open, and increasing the opening degree of the throttling device 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 method of controlling an air conditioner according to any one of claims 1 to 7 when executing the computer program.
9. An air conditioner characterized by comprising the controller of claim 8.
10. A computer-readable storage medium characterized by storing computer-executable instructions for performing the control method of an air conditioner according to any one of claims 1 to 7.
CN202210486259.6A 2022-05-06 2022-05-06 Air conditioner control method, controller, air conditioner and storage medium Active CN114738927B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210486259.6A CN114738927B (en) 2022-05-06 2022-05-06 Air conditioner control method, controller, air conditioner and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210486259.6A CN114738927B (en) 2022-05-06 2022-05-06 Air conditioner control method, controller, air conditioner and storage medium

Publications (2)

Publication Number Publication Date
CN114738927A true CN114738927A (en) 2022-07-12
CN114738927B CN114738927B (en) 2024-04-30

Family

ID=82286285

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210486259.6A Active CN114738927B (en) 2022-05-06 2022-05-06 Air conditioner control method, controller, air conditioner and storage medium

Country Status (1)

Country Link
CN (1) CN114738927B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110986334A (en) * 2019-12-27 2020-04-10 广东美的制冷设备有限公司 Control method and device of air conditioner, air conditioner and electronic equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110986334A (en) * 2019-12-27 2020-04-10 广东美的制冷设备有限公司 Control method and device of air conditioner, air conditioner and electronic equipment

Also Published As

Publication number Publication date
CN114738927B (en) 2024-04-30

Similar Documents

Publication Publication Date Title
CN211739590U (en) Oil return system for low-temperature continuous heating and air conditioning equipment
CN110425112B (en) Compressor liquid impact prevention air conditioner and compressor liquid impact prevention control method
CN110677014B (en) Cooling system and method of frequency converter capable of uniformly cooling frequency converter and air conditioning equipment
CN110567048B (en) Control method and device for electronic expansion valve in multi-split air conditioning operation
WO2024001534A1 (en) Outdoor unit control method for air conditioning system, device, outdoor unit, and air conditioning system
CN111023457A (en) Air conditioner defrosting method, air conditioner and storage medium
CN113503662A (en) Air conditioning system and control method thereof
CN114923292A (en) Air conditioner, control method thereof, controller and computer readable storage medium
CN115111704A (en) Control method of air conditioner, controller, air conditioner and storage medium
JPH07111283B2 (en) Multi-room air conditioner
JP6890727B1 (en) Air conditioning system and control method
US11940192B2 (en) Air conditioning device
CN110470000B (en) Control method and device for defrosting of air conditioner and air conditioner
CN114738927A (en) Control method of air conditioner, controller, air conditioner and storage medium
CN115325688A (en) Anti-condensation control method, controller, multi-split air conditioner and storage medium
CN113188237B (en) Control method and device of air conditioner, storage medium and processor
CN114484742A (en) Control method and device of air conditioner, control equipment and storage medium
CN114688630B (en) Air conditioner, control method and device thereof and readable storage medium
CN113405155A (en) Expansion valve control method and device and multi-connected air conditioner
CN110542183B (en) Operation control method, operation control device, air conditioner, and storage medium
CN114811863B (en) Control method of multi-split air conditioner, controller, air conditioner and medium
WO2023226501A1 (en) Control method for air conditioner, controller, air conditioner and storage medium
CN117249558B (en) Air conditioner control method and device, air conditioner and storage medium
WO2024021600A1 (en) Ice storage air conditioner, method, apparatus, and computer readable storage medium
CN115773613B (en) Condensation prevention control method and device for heat pump system and heat pump system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant