CN113405245A - Method for controlling air conditioner, storage medium and air conditioner - Google Patents
Method for controlling air conditioner, storage medium and air conditioner Download PDFInfo
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- CN113405245A CN113405245A CN202110642896.3A CN202110642896A CN113405245A CN 113405245 A CN113405245 A CN 113405245A CN 202110642896 A CN202110642896 A CN 202110642896A CN 113405245 A CN113405245 A CN 113405245A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 29
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 8
- 239000003507 refrigerant Substances 0.000 description 11
- 238000005057 refrigeration Methods 0.000 description 9
- 238000005507 spraying Methods 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000004075 alteration Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- 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
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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
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method for controlling an air conditioner, a storage medium and the air conditioner, wherein the method for controlling the air conditioner comprises the following steps: detecting a cooling mode of the air conditioner; acquiring a suction pressure value of a compressor and the current operating frequency of the compressor; and controlling the running state of the compressor according to the suction pressure value of the compressor and the current running frequency of the compressor. The method controls the compressor by detecting the suction pressure value of the compressor on the outdoor unit side and the current running frequency of the compressor, so that the requirement of a user on the indoor temperature can be met under the condition of not needing the communication between the indoor unit and the outdoor unit, and the temperature adjusting speed is increased.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method for controlling an air conditioner, a computer storage medium and the air conditioner.
Background
In the related art, the operation of the compressor is usually controlled by a detected temperature value during the operation of the air conditioner, but this method needs communication between the indoor unit and the outdoor unit, so that the speed of the air conditioning system for adjusting the indoor temperature is slow.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for controlling an air conditioner, which controls a compressor by detecting a suction pressure value of the compressor on an outdoor unit side and a current operating frequency of the compressor, thereby satisfying a user's demand for an indoor temperature and increasing a temperature adjusting speed without communication between an indoor unit and an outdoor unit.
It is another object of the present invention to provide a computer storage medium.
The invention also provides an air conditioner.
In order to solve the above problem, a method of controlling an air conditioner according to an embodiment of a first aspect of the present invention includes: detecting a cooling mode of the air conditioner; acquiring a suction pressure value of a compressor and the current operating frequency of the compressor; and controlling the running state of the compressor according to the suction pressure value of the compressor and the current running frequency of the compressor.
According to the method for controlling the air conditioner, the operation state of the compressor is controlled by detecting the suction pressure value of the compressor on the outdoor unit side and the current operation frequency of the compressor in real time in the refrigeration mode, so that the control of the compressor can be realized under the condition that the communication between an indoor unit and an outdoor unit is not needed, the requirement of a user on the indoor temperature is met, the temperature regulation speed is increased, and compared with the mode of controlling the operation of the compressor by using the detected temperature value, the method for controlling the air conditioner controls the operation state of the compressor by using the monitored suction pressure value Ps of the compressor, and the accuracy of the control on the frequency of the compressor can also be improved.
In some embodiments, controlling the operating state of the compressor based on the compressor suction pressure value and the current operating frequency of the compressor comprises: determining that the suction pressure value of the compressor is greater than a first preset pressure threshold value, and the current operating frequency of the compressor is less than the highest allowable operating frequency of the compressor, and controlling the compressor to increase the frequency, wherein the first preset pressure threshold value is the sum of a starting set pressure value and a preset pressure threshold value; or, if the suction pressure value of the compressor is determined to be greater than the first preset pressure threshold value and the current operating frequency of the compressor reaches the highest allowable operating frequency of the compressor, controlling the compressor to operate at the current operating frequency of the compressor.
In some embodiments, controlling the operating state of the compressor based on the compressor suction pressure value and the current operating frequency of the compressor comprises: and if the suction pressure value of the compressor is determined to be smaller than a first preset pressure threshold value and larger than a second preset pressure threshold value, controlling the compressor to operate at the current operating frequency of the compressor, wherein the first preset pressure threshold value is the sum of the starting set pressure value and the preset pressure threshold value, and the second preset pressure threshold value is the difference between the starting set pressure value and the preset pressure threshold value.
In some embodiments, controlling the operating state of the compressor based on the compressor suction pressure value and the current operating frequency of the compressor comprises: determining that the suction pressure value of the compressor is smaller than the second preset pressure threshold and larger than a suction pressure stop value, and the current operating frequency of the compressor is larger than the lowest allowable operating frequency of the compressor, controlling the compressor to reduce the frequency; or, if the suction pressure value of the compressor is determined to be smaller than the second preset pressure threshold value and larger than the suction pressure stop value, and the current operation frequency of the compressor is determined to reach the lowest allowable operation frequency of the compressor, controlling the compressor to operate at the current operation frequency of the compressor.
In some embodiments, controlling the operating state of the compressor based on the compressor suction pressure value and the current operating frequency of the compressor comprises: and if the suction pressure value of the compressor is determined to be smaller than the suction pressure stop value, controlling the compressor to stop running.
In some embodiments, a hydrojet electronic expansion valve is disposed between the compressor and the outdoor heat exchanger, and the method further comprises: acquiring the exhaust temperature of a compressor; determining that the exhaust temperature of the compressor is greater than a first preset temperature threshold value and the compressor is in an operating state, and controlling the opening of a liquid spraying electronic expansion valve to perform liquid spraying cooling on the compressor; or determining that the exhaust temperature of the compressor is smaller than a second preset temperature threshold or the compressor is in a stop running state, and controlling the liquid injection electronic expansion valve to be closed, wherein the first preset temperature threshold is larger than the second preset temperature threshold.
In some embodiments, a pressure relief solenoid valve is disposed between the discharge port and the suction port of the compressor, and before obtaining the compressor suction pressure value and the current frequency of compressor operation, the method further comprises: and controlling the pressure relief electromagnetic valve to be opened so as to relieve the pressure of the compressor, and controlling the pressure relief electromagnetic valve to be closed and controlling the compressor to run to the initial running frequency after first preset time.
An embodiment of a second aspect of the present invention provides a computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method for controlling an air conditioner according to the above-described embodiment.
An embodiment of a third aspect of the present invention provides an air conditioner, including: the compressor, the indoor heat exchanger, the outdoor heat exchanger and the throttling element; the pressure sensor is used for acquiring the suction pressure value of the compressor; and the controller is connected with the pressure sensor and is used for executing the method for controlling the air conditioner in the embodiment.
According to the air conditioner provided by the embodiment of the invention, the controller adopts the method for controlling the air conditioner provided by the embodiment to detect the suction pressure value of the compressor on the outdoor unit side and the current operation frequency of the compressor to control the compressor, so that the requirement of a user on the indoor temperature can be met under the condition of not needing the communication between the indoor unit and the outdoor unit, and the temperature regulation speed is increased.
In some embodiments, the air conditioner further comprises: the pressure relief electromagnetic valve is arranged between the air exhaust port and the air suction port of the compressor; the liquid injection electronic expansion valve is arranged between the compressor and the outdoor heat exchanger; and the temperature sensor is connected with the controller and used for collecting the exhaust temperature of the compressor.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a method of controlling an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a method of controlling an air conditioner according to another embodiment of the present invention;
FIG. 3 is a schematic illustration of a low pressure range according to one embodiment of the present invention;
fig. 4 is a block diagram of an air conditioner according to an embodiment of the present invention;
fig. 5 is a schematic structural view of an air conditioner according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
The air conditioner performs functions such as refrigeration/heating circulation or dehumidification through the compressor, the condenser, the expansion valve and the evaporator, can realize the regulation of the indoor environment, and improves the comfort of the indoor environment. The refrigeration cycle includes a series of processes, for example, involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas, the discharged refrigerant gas flows into a condenser, the condenser condenses the compressed refrigerant into a liquid state, and heat is released to the surrounding environment through a condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
In the related art, the operation of the compressor is usually controlled by a detected temperature value during the operation of the air conditioner, but this method needs communication between the indoor unit and the outdoor unit, so that the speed of the air conditioning system for adjusting the indoor temperature is slow.
In order to solve the above problems, a first embodiment of the present invention provides a method for controlling an air conditioner, which controls a compressor by detecting a suction pressure value of the compressor on an outdoor unit side and a current operating frequency of the compressor, so as to meet a user's requirement for an indoor temperature and increase a temperature adjustment speed without communication between an indoor unit and an outdoor unit.
The method for controlling an air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings, and as shown in fig. 1, the method according to an embodiment of the present invention includes at least steps S1 to S3.
In step S1, the air conditioner operation cooling mode is detected.
In an embodiment, a user may operate the air conditioner to operate the cooling mode through a remote controller, an air conditioner APP (Application program) in the mobile terminal, or an operation panel on a body of the air conditioner in a manner of language, gesture, or the like, or may operate the cooling mode by default when the air conditioner is turned on. For example, when the user turns on the air conditioner, the user manually selects a required cooling mode according to actual requirements; or when the user starts the air conditioner, the user does not receive an instruction for selecting a required operation mode, at this time, the air conditioner selects a default operation refrigeration mode, the default operation refrigeration mode is a preset or last operation mode recorded by the air conditioner, namely, after the air conditioner is started, the default operation mode is the refrigeration mode.
And step S2, acquiring the suction pressure value of the compressor and the current operating frequency of the compressor.
In an embodiment, a pressure sensor may be disposed at the suction port of the compressor to collect the suction pressure value of the compressor in real time, which may be denoted as Ps, for example, and the sensor transmits the collected data to an outdoor unit controller of the air conditioner. And, the outdoor unit controller of the air conditioner can monitor the compressor to obtain the operating frequency of the compressor in real time.
And step S3, controlling the operation state of the compressor according to the suction pressure value of the compressor and the current operation frequency of the compressor.
In the embodiment, in the refrigeration mode, different indoor environment temperatures correspond to different low-pressure pressures, an outdoor unit controller of the air conditioner can automatically dial and set the low-pressure corresponding to the target environment temperature according to the target environment temperature set by a user, the low-pressure serving as a starting set pressure value can be recorded as Psh, for example, based on the low-pressure, the embodiment of the invention judges the change of the pressure according to the real-time detected compressor suction pressure value Ps, controls the running state of the compressor by combining with the real-time monitored current running frequency of the compressor, and gradually stabilizes the compressor suction pressure value Ps at the starting set pressure value Psh to enable the temperature of the corresponding indoor environment to reach the target environment temperature so as to meet the requirement of the user on the indoor environment temperature, so that the method of the embodiment of the invention can achieve the purpose of adjusting the indoor environment temperature by detecting the state parameters of the outdoor unit side, namely the compressor suction pressure value Ps and the current running frequency of the compressor And the indoor unit side does not need to communicate with the indoor unit side, so that the indoor temperature adjusting speed is increased.
In addition, compared with the mode of controlling the operation of the compressor by using the detected temperature value, the embodiment of the invention can also improve the accuracy of the frequency control of the compressor and improve the reliability of the operation of the compressor by using the monitored suction pressure value Ps of the compressor and the current operation frequency of the compressor to control the operation state of the compressor.
According to the method for controlling the air conditioner, the compressor suction pressure value and the current running frequency of the compressor on the outdoor unit side are detected in real time in the refrigeration mode, and the running state of the compressor is controlled according to the compressor suction pressure value and the current running frequency of the compressor, so that the compressor can be controlled under the condition that the indoor unit and the outdoor unit do not need to communicate, the requirement of a user on indoor temperature is met, the temperature adjusting speed is increased, and compared with a mode of controlling the running of the compressor according to the detected temperature value, the method for controlling the air conditioner controls the running state of the compressor according to the monitored compressor suction pressure value Ps, and the accuracy of controlling the frequency of the compressor can also be improved.
In some embodiments, if it is determined that the compressor suction pressure value Ps is greater than the first preset pressure threshold, it indicates that the temperature of the indoor environment does not reach the target environment temperature set by the user, and meanwhile, if it is determined that the current operation frequency of the compressor is less than the maximum allowable operation frequency of the compressor, the compressor suction pressure value Ps is reduced by controlling the compressor to increase the frequency, and the temperature of the indoor environment is reduced, so as to meet the user requirement on the indoor environment temperature.
The first preset pressure threshold is the sum of the startup set pressure value Psh and the preset pressure threshold. The preset pressure threshold is an allowable deviation value between the first preset pressure threshold and the startup set pressure value, and the preset pressure threshold may be preset according to an actual situation, which is not limited to this.
Or, if it is determined that the suction pressure value Ps of the compressor is greater than the first preset pressure threshold, it indicates that the temperature of the indoor environment does not reach the target environment temperature set by the user, but at the same time, if it is determined that the current operating frequency of the compressor reaches the maximum allowable operating frequency of the compressor, the compressor is controlled to operate at the current operating frequency of the compressor, that is, the compressor is controlled to operate at the maintained frequency, so that the temperature of the indoor environment can be reduced, the requirement of the user on the temperature of the indoor environment can be met, the compressor can be prevented from operating at the ultrahigh frequency, and the reliability of the operation of the compressor can be improved.
In some embodiments, if it is determined that the compressor suction pressure value Ps is smaller than the first preset pressure threshold and larger than the second preset pressure threshold, it indicates that the temperature of the indoor environment reaches the target environment temperature set by the user, and therefore, the compressor is controlled to operate at the current operating frequency of the compressor to maintain the temperature of the indoor environment, so as to meet the user requirement on the indoor environment temperature. The first preset pressure threshold value is the sum of the startup set pressure value Psh and the preset pressure threshold value, and the second preset pressure threshold value is the difference between the startup set pressure value Psh and the preset pressure threshold value.
In some embodiments, if it is determined that the compressor suction pressure value Ps is less than the second preset pressure threshold and is greater than the suction pressure stop value, which may be written as Psl, for example, it indicates that the temperature of the indoor environment is lower than the target environment temperature set by the user, and meanwhile, if it is determined that the current operating frequency of the compressor is greater than the minimum allowable operating frequency of the compressor, the compressor is controlled to reduce the frequency to increase the compressor suction pressure value Ps and raise the temperature of the indoor environment, so as to meet the user demand for the indoor environment temperature.
Or, if it is determined that the suction pressure value Ps of the compressor is smaller than the second preset pressure threshold and larger than the suction pressure shutdown value Psl, it indicates that the temperature of the indoor environment is lower than the target environment temperature set by the user, but at the same time, if it is determined that the current operating frequency of the compressor reaches the lowest allowable operating frequency of the compressor, the compressor is controlled to operate at the current operating frequency of the compressor, that is, the compressor is controlled to operate at the maintained frequency, so that the temperature of the indoor environment can be increased, the requirement of the user on the temperature of the indoor environment can be met, the compressor can be prevented from operating at an ultra-low frequency.
In some embodiments, if it is determined that the suction pressure value Ps of the compressor is less than the suction pressure shutdown value Psl, it indicates that the low pressure in the air conditioning system meets the requirement of low pressure protection, and therefore, the compressor needs to be controlled to stop operating in order to ensure normal and reliable operation of the air conditioner.
In some embodiments, for the air conditioner matched with the commercial refrigerator at the indoor machine side, the air conditioner is usually in an operating state all day long, and in order to ensure the reliability of the compressor, in the embodiments of the invention, a liquid injection electronic expansion valve is arranged between the compressor and an outdoor heat exchanger, and a pressure relief electromagnetic valve is arranged, so that the liquid injection cooling effect is realized when the compressor operates at a high temperature.
Specifically, the exhaust temperature of the compressor is obtained and recorded as T, for example, a temperature sensor may be arranged at an exhaust port of the compressor to detect the exhaust temperature T of the compressor in real time, and when it is determined that the exhaust temperature T of the compressor is greater than a first preset temperature threshold and the compressor is in an operating state, the electronic liquid injection expansion valve is controlled to be opened to cool the compressor by injecting liquid, so that the compressor is prevented from operating at a high temperature, and the reliability of the compressor is improved; or when the exhaust temperature T of the compressor is determined to be less than the second preset temperature threshold value or the compressor is in a stop operation state, the compressor does not operate at a high temperature, liquid injection cooling on the compressor is not needed, and therefore the liquid injection electronic expansion valve is controlled to be closed. That is to say, in the embodiment of the present invention, the liquid spraying circulation system in the air conditioner is controlled by the on-off state of the liquid spraying electronic expansion valve, and the liquid spraying amount is adjusted by adjusting the opening degree of the liquid spraying electronic expansion valve, so that the requirement of the compressor for cooling the sprayed liquid can be met without arranging an electromagnetic valve, and the reliability of the compressor is improved.
The first preset temperature threshold is larger than the second preset temperature threshold.
In some embodiments, the air conditioner matched with the commercial refrigerator at the indoor unit side is usually in an operating state all day long, and in order to ensure the reliability of the compressor, the embodiment of the invention is provided with the pressure relief electromagnetic valve between the air outlet and the air inlet of the compressor so as to play a role in balancing high and low pressure in the system when the air conditioner is started to operate.
Specifically, before obtaining a suction pressure value of the compressor and a current operation frequency of the compressor, the compressor is decompressed by controlling the decompression electromagnetic valve to be opened, and after a first preset time, the decompression electromagnetic valve is controlled to be closed, and the compressor is controlled to operate to an initial operation frequency, for example, the compressor is controlled to operate to a lowest allowable operation frequency of the compressor.
For example, before the compressor is started every time, the pressure relief electromagnetic valve needs to be controlled to be opened to relieve the pressure of the compressor, so that the problem that the compressor blocks a cylinder body due to large high-low pressure difference and overlarge torque when the compressor is started is solved, the pressure in the air conditioning system is balanced after a first preset time of 30s, the pressure relief electromagnetic valve is controlled to be closed at the moment, and the compressor starts to operate, so that the reliability of the compressor is further improved.
A method for controlling an air conditioner according to an embodiment of the present invention is described below with reference to fig. 2 and 3, and the specific steps are as follows.
And step S4, turning ON a unit operation switch, namely starting the air conditioner to run.
In step S5, the compressor suction pressure value Ps is read.
In step S6, it is determined that Ps > Psh +0.07MPa, i.e., the preset pressure threshold is set to 0.07MPa, step S7 is performed.
And step S7, controlling the frequency of the compressor to be increased when the current running frequency of the compressor is less than the maximum allowable running frequency of the compressor, such as 95 HZ.
And step S8, controlling the compressor to operate at the current operating frequency of the compressor, namely, the compressor is operated at the 95HZ frequency.
Step S9, determining Psh-0.07MPa < Ps < Psh +0.07MPa, executing step S10.
In step S10, the compressor is operated at the current operating frequency of the compressor, i.e., the compressor is operated with the current operating frequency maintained stable.
Step S11, determining that Psl < Ps < Psh-0.07MPa, executing step S12.
And step S12, controlling the compressor to reduce the frequency when the current running frequency of the compressor is greater than the lowest allowable running frequency of the compressor, such as 30 HZ.
And step S13, determining that the current running frequency of the compressor reaches the lowest allowable running frequency of the compressor, such as 30HZ, and controlling the compressor to run at the current running frequency of the compressor, namely, the compressor keeps running at the 30HZ frequency.
In step S14, if Ps < Psl is determined, step S15 is performed.
And step S15, controlling the compressor to stop running.
In step S16, the compressor discharge temperature T is read.
Step S17, judge T >95 ℃. If yes, go to step S18; if not, go to step S16.
And step S18, controlling the opening of the liquid spraying electronic expansion valve.
An embodiment of a second aspect of the present invention provides a computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method for controlling an air conditioner provided by the above-mentioned embodiment.
An embodiment of a third aspect of the present invention provides an air conditioner, as shown in fig. 4, the air conditioner 10 includes a compressor 1, an indoor heat exchanger 2, an outdoor heat exchanger 3, a throttling element 4, a pressure sensor 5, and a controller 6.
The pressure sensor 5 is used for acquiring the suction pressure value of the compressor; the controller 6 is connected to the pressure sensor 5 for performing the method of controlling the air conditioner provided in the above embodiment.
It should be noted that a specific implementation manner of the air conditioner 10 according to the embodiment of the present invention is similar to a specific implementation manner of the method for controlling an air conditioner according to any of the above embodiments of the present invention, and please refer to the description of the method for details, which is not described herein again to reduce redundancy.
According to the air conditioner 10 of the embodiment of the present invention, the controller 6 controls the compressor according to the detected suction pressure value of the compressor and the current operating frequency of the compressor by using the method for controlling the air conditioner provided by the above embodiment, so that the requirement of the user on the indoor temperature can be met without the communication between the indoor unit and the outdoor unit, and the temperature adjusting speed is increased.
In some embodiments, as shown in FIG. 4, air conditioner 10 further includes a pressure relief solenoid valve 7, a spray solenoid valve 8, and a temperature sensor 9.
Wherein, temperature sensor 9 is connected with controller 6 for gather compressor exhaust temperature. The pressure relief electromagnetic valve 7 is arranged between the exhaust port and the air suction port of the compressor 1; the liquid injection electronic expansion valve 8 is arranged between the compressor 1 and the outdoor heat exchanger 3.
For example, in fig. 5, the air conditioner is a single cooling cycle, and the refrigerant is discharged from the compressor 1, passes through the outdoor heat exchanger 3, enters the high pressure accumulator, enters the indoor heat exchanger 2 through the throttling element 4 such as a stop valve, returns to the gas-liquid separator after the heat exchange of the indoor heat exchanger 2 is completed, and returns to the compressor 1, thereby completing the refrigeration cycle of the entire system. And in order to ensure the circulation reliability of the air conditioning system, a high-pressure switch, a high-pressure sensor, a low-pressure switch, a low-pressure sensor, a one-way valve, a pressure relief electromagnetic valve 7, a high-pressure liquid reservoir, a drying filter, a liquid injection electronic expansion valve 8 and a liquid viewing mirror are further arranged in the whole system, so that the liquid injection circulating system is controlled by the liquid injection electronic expansion valve 8 and the pressure relief electromagnetic valve 7 in the refrigerating circulation process, and the circulation reliability of the system is ensured.
In the description of this specification, any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of custom logic functions or processes, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A method of controlling an air conditioner, comprising:
detecting a cooling mode of the air conditioner;
acquiring a suction pressure value of a compressor and the current operating frequency of the compressor;
and controlling the running state of the compressor according to the suction pressure value of the compressor and the current running frequency of the compressor.
2. The method of controlling an air conditioner according to claim 1, wherein controlling an operation state of a compressor according to the compressor suction pressure value and the current operation frequency of the compressor comprises:
determining that the suction pressure value of the compressor is greater than a first preset pressure threshold value, and the current operating frequency of the compressor is smaller than the highest allowable operating frequency of the compressor, and controlling the compressor to increase the frequency, wherein the first preset pressure threshold value is the sum of a starting set pressure value and a preset pressure threshold value;
or, if the suction pressure value of the compressor is determined to be greater than the first preset pressure threshold value and the current operating frequency of the compressor reaches the highest allowable operating frequency of the compressor, controlling the compressor to operate at the current operating frequency of the compressor.
3. The method of controlling an air conditioner according to claim 1, wherein controlling an operation state of a compressor according to the compressor suction pressure value and the current operation frequency of the compressor comprises:
and if the suction pressure value of the compressor is determined to be smaller than a first preset pressure threshold value and larger than a second preset pressure threshold value, controlling the compressor to operate at the current operating frequency of the compressor, wherein the first preset pressure threshold value is the sum of a starting set pressure value and a preset pressure threshold value, and the second preset pressure threshold value is the difference value of the starting set pressure value and the preset pressure threshold value.
4. The method of controlling an air conditioner according to claim 1, wherein controlling an operation state of a compressor according to the compressor suction pressure value and the current operation frequency of the compressor comprises:
determining that the suction pressure value of the compressor is smaller than a second preset pressure threshold value and larger than a suction pressure shutdown value, and the current operating frequency of the compressor is larger than the lowest allowable operating frequency of the compressor, and controlling the compressor to reduce the frequency, wherein the second preset pressure threshold value is the difference value between a set pressure value for startup and a preset pressure threshold value;
or, if the suction pressure value of the compressor is determined to be smaller than the second preset pressure threshold value and larger than the suction pressure stop value, and the current operation frequency of the compressor is determined to reach the lowest allowable operation frequency of the compressor, controlling the compressor to operate at the current operation frequency of the compressor.
5. The method of controlling an air conditioner according to claim 1, wherein controlling an operation state of a compressor according to the compressor suction pressure value and the current operation frequency of the compressor comprises:
and if the suction pressure value of the compressor is determined to be smaller than the suction pressure stop value, controlling the compressor to stop running.
6. The method of controlling an air conditioner according to claim 1, wherein a liquid jet electronic expansion valve is provided between the compressor and the outdoor heat exchanger, the method further comprising:
acquiring the exhaust temperature of a compressor;
determining that the exhaust temperature of the compressor is greater than a first preset temperature threshold value and the compressor is in an operating state, and controlling the opening of the liquid injection electronic expansion valve to perform liquid injection cooling on the compressor;
or determining that the exhaust temperature of the compressor is smaller than a second preset temperature threshold or the compressor is in a stop running state, and controlling the liquid injection electronic expansion valve to be closed, wherein the first preset temperature threshold is larger than the second preset temperature threshold.
7. The method of controlling an air conditioner according to claim 1, wherein a pressure relief solenoid valve is provided between an exhaust port and a suction port of the compressor, and before acquiring a compressor suction pressure value and a current operating frequency of the compressor, the method further comprises:
and controlling the pressure relief electromagnetic valve to be opened so as to relieve the pressure of the compressor, and controlling the pressure relief electromagnetic valve to be closed and controlling the compressor to run to the initial running frequency after first preset time.
8. A computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of controlling an air conditioner of any one of claims 1-7.
9. An air conditioner, comprising:
the compressor, the indoor heat exchanger, the outdoor heat exchanger and the throttling element;
the pressure sensor is used for acquiring the suction pressure value of the compressor;
a controller connected to the pressure sensor for performing the method of controlling the air conditioner of any one of claims 1 to 7.
10. The air conditioner according to claim 9, further comprising:
the pressure relief electromagnetic valve is arranged between the air exhaust port and the air suction port of the compressor;
the liquid injection electronic expansion valve is arranged between the compressor and the outdoor heat exchanger;
and the temperature sensor is connected with the controller and used for collecting the exhaust temperature of the compressor.
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| CN202110642896.3A CN113405245A (en) | 2021-06-09 | 2021-06-09 | Method for controlling air conditioner, storage medium and air conditioner |
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| CN114738939A (en) * | 2022-03-04 | 2022-07-12 | 青岛海尔空调电子有限公司 | Method and device for controlling outdoor unit, outdoor unit and storage medium |
| CN114738978A (en) * | 2022-03-30 | 2022-07-12 | 北京小米移动软件有限公司 | Air conditioner compressor operation frequency control method and device and storage medium |
| CN114857663A (en) * | 2022-05-12 | 2022-08-05 | 青岛海信日立空调系统有限公司 | Air conditioning system and control method thereof |
| CN115183492A (en) * | 2022-06-14 | 2022-10-14 | 海信空调有限公司 | Air conditioner and control method thereof |
| CN115200184A (en) * | 2022-07-11 | 2022-10-18 | 上海科泰运输制冷设备有限公司 | Frequency control method, controller and storage medium of condensing fan |
| CN115264922A (en) * | 2022-08-08 | 2022-11-01 | 海信（广东）空调有限公司 | Air conditioner |
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Address after: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant after: Hisense Air Conditioning Co.,Ltd. Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. |
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Application publication date: 20210917 |