CN115597199A - Method for controlling air conditioner, air conditioner and storage medium - Google Patents

Method for controlling air conditioner, air conditioner and storage medium Download PDF

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Publication number
CN115597199A
CN115597199A CN202110720791.5A CN202110720791A CN115597199A CN 115597199 A CN115597199 A CN 115597199A CN 202110720791 A CN202110720791 A CN 202110720791A CN 115597199 A CN115597199 A CN 115597199A
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China
Prior art keywords
compressor
temperature
air conditioner
heat exchanger
difference
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CN202110720791.5A
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Chinese (zh)
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席战利
唐亚林
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Priority to CN202110720791.5A priority Critical patent/CN115597199A/en
Publication of CN115597199A publication Critical patent/CN115597199A/en
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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
    • 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
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control 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
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The embodiment of the application discloses a method for controlling an air conditioner, the air conditioner and a storage medium, wherein the method comprises the following steps: when the difference between the temperature of a compressor and the temperature of a heat exchanger in the air conditioner is in a set range, detecting whether the working frequency of the compressor is smaller than a set threshold value or not; when the working frequency of the compressor is smaller than the set threshold value, the working frequency of the compressor is increased; and when the working frequency of the compressor is greater than or equal to the set threshold value, reducing the opening degree of a throttling element in the air conditioner.

Description

Method for controlling air conditioner, air conditioner and storage medium
Technical Field
The present invention relates to the field of air conditioners, and in particular, to a method for controlling an air conditioner, and a storage medium.
Background
In the related art, lubricating oil is arranged at the bottom of a compressor of an air conditioner, refrigerants are arranged in an outdoor heat exchanger and an indoor heat exchanger, and the refrigerants in the heat exchangers can migrate to the compressor in the operation process of the air conditioner, so that the lubricating oil of the compressor is diluted by the refrigerants, and the compressor is lubricated badly and abraded.
Disclosure of Invention
In view of the above, embodiments of the present disclosure provide a method for controlling an air conditioner, an air conditioner and a storage medium, so as to solve the technical problem in the related art that lubrication oil of a compressor in the air conditioner is diluted by a refrigerant, which causes the compressor to be lubricated badly and worn.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the embodiment of the application provides a method for controlling an air conditioner, which comprises the following steps:
when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in a set range, detecting whether the working frequency of the compressor is smaller than a set threshold value;
when the working frequency of the compressor is smaller than the set threshold value, the working frequency of the compressor is increased;
and when the working frequency of the compressor is greater than or equal to the set threshold value, reducing the opening degree of a throttling element in the air conditioner.
In the foregoing solution, the increasing the operating frequency of the compressor includes:
increasing an operating frequency of the compressor based on a first parameter; wherein,
the first parameter includes at least one of:
a first set step length;
the difference between the temperature of the compressor and the temperature of the heat exchanger;
a product between a first setting coefficient and a rated frequency of the compressor; the first setting coefficient is greater than 0 and less than 1.
In the above aspect, the reducing the opening degree of the throttling element in the air conditioner includes:
reducing the opening degree of a throttling element in the air conditioner based on a second parameter; wherein,
the second parameter includes at least one of:
setting a second step length;
the difference between the temperature of the compressor and the temperature of the heat exchanger;
the product of the second setting factor and the nominal opening of the restriction element; the second setting coefficient is greater than 0 and less than 1.
In the above embodiment, the first boundary value of the predetermined range is-15 ℃ and the second boundary value of the predetermined range is 10 ℃.
In the above scheme, when the difference between the temperature of the compressor in the air conditioner and the temperature of the heat exchanger is within a set range, detecting whether the operating frequency of the compressor is less than a set threshold value includes:
when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is smaller than or equal to zero, whether the working frequency of the compressor is smaller than a set threshold value or not is detected.
In the above solution, after increasing the operating frequency of the compressor, or after decreasing the opening degree of a throttling element in the air conditioner, the method further includes:
and after the air conditioner runs for a first time period, acquiring the temperature of the compressor and the temperature of the heat exchanger, and executing the step of detecting whether the working frequency of the compressor is smaller than a set threshold value or not when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in a set range.
In the foregoing solution, the method further includes one of:
calculating a difference between a temperature of the compressor and a temperature of an outdoor heat exchanger in a case where the air conditioner is in a cooling mode or a dehumidifying mode;
and under the condition that the air conditioner is in a heating mode, calculating the difference between the temperature of the compressor and the temperature of an indoor heat exchanger.
The embodiment of the present application further provides an air conditioner, including:
the detection unit is used for detecting whether the working frequency of the compressor is smaller than a set threshold value or not when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in a set range;
the first control unit is used for increasing the working frequency of the compressor when the working frequency of the compressor is smaller than the set threshold value;
and the second control unit is used for reducing the opening degree of a throttling element in the air conditioner when the working frequency of the compressor is greater than or equal to the set threshold value.
The embodiment of the present application further provides an air conditioner, including: a compressor, an indoor heat exchanger, a throttling element, an outdoor heat exchanger, a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to execute the steps of the method for controlling an air conditioner when the computer program is executed.
Embodiments of the present application also provide a storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of any one of the above-mentioned methods for controlling an air conditioner.
In the embodiment of the application, when the refrigerant is set to migrate, the set range corresponding to the temperature difference between the compressor and the heat exchanger is set, under the condition that the air conditioner is in the running state, when the temperature difference between the temperature of the compressor and the temperature of the heat exchanger is in the set range, the power of the compressor is increased by increasing the working frequency of the compressor or reducing the opening degree of a throttling element in the air conditioner, so that the temperature of the compressor is increased, because the temperature increasing speed of the compressor is greater than the temperature increasing speed of the heat exchanger, the difference between the temperature of the compressor and the temperature of the heat exchanger can be reduced, finally, the temperature of the compressor is greater than the temperature of the heat exchanger, and further, the refrigerant is prevented from migrating from the heat exchanger to the compressor, so that the probability that lubricating oil of the compressor is diluted by the refrigerant is prevented, the wear resistance of the compressor is improved, and the reliability of the system is improved.
Drawings
Fig. 1 is a schematic flowchart illustrating an implementation process of a method for controlling an air conditioner according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart illustrating an implementation of a method for controlling an air conditioner according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of another air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a hardware component structure of an air conditioner according to an embodiment of the present application.
Detailed Description
When the air conditioner operates at a low frequency, the temperature of the heat exchanger is easily higher than the temperature of the bottom of the compressor, so that the refrigerant in the heat exchanger migrates to the compressor, lubricating oil at the bottom of the compressor is diluted by the refrigerant, and the compressor is lubricated badly and abraded.
Although the air conditioner needs a lot of reliability verification before leaving the factory to avoid the problem, the air conditioner is complex in use environment and cannot verify all conditions in a laboratory. In the related art, there is no effective method for preventing the refrigerant in the heat exchanger from migrating toward the compressor during the operation of the air conditioner.
In order to solve the above technical problem, an embodiment of the present invention provides a method for controlling an air conditioner, where when a difference between a temperature of a compressor and a temperature of a heat exchanger in the air conditioner is within a set range, it is detected whether an operating frequency of the compressor is less than a set threshold; when the working frequency of the compressor is smaller than the set threshold value, the working frequency of the compressor is increased; and when the working frequency of the compressor is greater than or equal to the set threshold value, reducing the opening degree of a throttling element in the air conditioner. In the scheme, when the refrigerant is set to migrate, the set range corresponding to the temperature difference between the compressor and the heat exchanger is set, under the condition that the air conditioner is in the running state, when the difference between the temperature of the compressor and the temperature of the heat exchanger is in the set range, the power of the compressor is increased by increasing the working frequency of the compressor or reducing the opening degree of a throttling element in the air conditioner, so that the temperature of the compressor is increased, finally, the difference between the temperature of the compressor and the temperature of the heat exchanger is not in the set range, further, the refrigerant is prevented from migrating from the heat exchanger to the compressor, the probability that lubricating oil of the compressor is diluted by the refrigerant is prevented, and the abrasion resistance of the compressor is improved.
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.
Fig. 1 is a schematic implementation flow chart of a method for controlling an air conditioner according to an embodiment of the present disclosure. Wherein, the main execution body of the process is an air conditioner. As shown in fig. 1, the method of controlling an air conditioner includes:
step 101: when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in a set range, whether the working frequency of the compressor is smaller than a set threshold value or not is detected.
Here, in a case where the air conditioner is in an operating state, the air conditioner acquires a first temperature collected by a sensor provided at a bottom of a compressor in the air conditioner, and acquires a second temperature collected by a sensor provided at a heat exchanger of the air conditioner; under the condition that the first temperature and the second temperature are obtained, a difference value between the first temperature and the second temperature is calculated, whether the calculated difference value is within a set range is judged, and a first judgment result is obtained. And under the condition that the difference value represented and calculated by the first judgment result is in a set range, acquiring the working frequency of a compressor in the air conditioner, judging whether the acquired working frequency is smaller than a set threshold value or not, and obtaining a second judgment result. Wherein the set threshold is less than the rated frequency of the compressor. And under the condition that the difference value represented and calculated by the first judgment result is not in the set range, keeping the current running state, and not adjusting the working frequency of the compressor and the opening of the throttling element.
In practical application, the difference between the first temperature and the second temperature is obtained by subtracting the second temperature from the first temperature. The sensor can be arranged inside the heat exchanger and the compressor or outside the heat exchanger and the compressor.
In some embodiments, the first boundary value of the set range is-15 ℃ and the second boundary value of the set range is 10 ℃. That is, the range Δ T ∈ -15 ℃,10 ℃ ] is set.
Executing step 102 under the condition that the second judgment result represents that the obtained working frequency is smaller than the set threshold; and executing step 103 when the second judgment result represents that the obtained working frequency is greater than or equal to the set threshold.
In order to ensure the accuracy of the calculated temperature difference, considering that the heat exchangers in the air conditioner include an outdoor heat exchanger and an indoor heat exchanger, in some embodiments, the method further includes one of:
calculating a difference between a temperature of the compressor and a temperature of an outdoor heat exchanger in a case where the air conditioner is in a cooling mode or a dehumidifying mode;
and under the condition that the air conditioner is in a heating mode, calculating the difference between the temperature of the compressor and the temperature of an indoor heat exchanger.
Wherein, the indoor heat exchanger and the outdoor heat exchanger are both in working state at the same time.
Therefore, under the condition that the air conditioner is in a refrigeration mode or a dehumidification mode, the temperature collected by a temperature sensor arranged on the outdoor heat exchanger is obtained, and the difference between the temperature of the compressor and the temperature of the outdoor heat exchanger is calculated; under the condition that the air conditioner is in a heating mode, the temperature collected by a temperature sensor arranged on the indoor heat exchanger is obtained, and the difference between the temperature of the compressor and the temperature of the indoor heat exchanger is calculated. That is, before step 101, the method of controlling an air conditioner further includes: 099, acquiring a working mode of the air conditioner; and step 100, acquiring the temperature of the compressor and the temperature of the heat exchanger according to the operation mode of the air conditioner. Wherein, step S100 includes: when the air conditioner is in a refrigeration mode or a dehumidification mode, acquiring the temperature of a compressor and the temperature of an outdoor heat exchanger; when the air conditioner is in a heating mode, the temperature of the compressor and the temperature of the indoor heat exchanger are obtained.
Illustratively, as shown in fig. 2, the air conditioner includes a four-way valve 1, an indoor heat exchanger 2, an inner fan 3, a throttling element 4, an outdoor heat exchanger 5, an outer fan 6, a compressor 8, and an accumulator 9. Wherein the compressor 8 is provided with an exhaust port 81 and the reservoir 9 is provided with an inlet 91. The indoor heat exchanger 2 is provided with a first temperature sensor 21, the outdoor heat exchanger 5 is provided with a second temperature sensor 51, and the bottom of the outer surface of the compressor 8 is provided with a third sensor 82.
Here, the first temperature T collected by the third sensor 82 is acquired in a state where the air conditioner is in an operating state 82 (ii) a When the air conditioner is in the cooling mode or the dehumidifying mode, the second temperature T collected by the second temperature sensor 51 is obtained 51 (ii) a When the air conditioner is in the heating mode, the second temperature T collected by the first sensor 21 is obtained 21 . In practice, the throttling element 4 may be an electronic expansion valve.
Wherein, when the air conditioner is in a cooling mode or a dehumidifying mode, the difference delta T = T between the temperature of the compressor and the temperature of the outdoor heat exchanger is calculated 82 -T 51 (ii) a Calculating a difference Δ T = T between a temperature of a compressor and a temperature of an indoor heat exchanger when an air conditioner is in a heating mode 82 -T 21 。
Considering that in practical applications, in a case that the temperature of the heat exchanger is greater than the temperature of the compressor, the refrigerant in the heat exchanger may migrate toward the compressor, so as to dilute the lubricating oil of the compressor, in some embodiments, the detecting whether the operating frequency of the compressor is less than the set threshold when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in the set range includes:
when the difference between the temperature of the compressor in the air conditioner and the temperature of the heat exchanger is smaller than or equal to zero, whether the working frequency of the compressor is smaller than a set threshold value or not is detected.
Here, in a case where the air conditioner is in an operating state, when a difference between a temperature of the compressor and a temperature of the heat exchanger is less than or equal to zero, it is detected whether an operating frequency of the compressor is less than a set threshold.
Step 102: and when the working frequency of the compressor is smaller than the set threshold value, the working frequency of the compressor is increased.
Here, when the difference between the temperature of the compressor in the air conditioner and the temperature of the heat exchanger is within a set range and the operating frequency of the compressor in the air conditioner is less than a set threshold, the operating frequency of the compressor is increased to increase the power of the compressor, thereby increasing the temperature of the compressor.
To improve the accuracy of controlling the compressor, in some embodiments, increasing the operating frequency of the compressor comprises:
increasing an operating frequency of the compressor based on a first parameter; wherein,
the first parameter includes at least one of:
a first set step length;
the difference between the temperature of the compressor and the temperature of the heat exchanger;
the product between the first set coefficient and the rated frequency of the compressor; the first setting coefficient is greater than 0 and less than 1.
Here, in one possible implementation, the air conditioner increases the operating frequency of the compressor by a first set step size. That is, the air conditioner increases the first set step size on the basis of the current operating frequency of the compressor so that the compressor operates at the adjusted operating frequency. In practical applications, the first setting step is 5 hertz (Hz).
In another possible implementation, the air conditioner subtracts the temperature of the heat exchanger from the temperature of the compressor to obtain a temperature difference, and the operating frequency of the compressor is increased based on the temperature difference.
For example, the air conditioner may determine an operating frequency corresponding to the currently calculated temperature difference based on the set correspondence between the temperature difference and the operating frequency, and increase the operating frequency of the compressor from the current operating frequency to the determined operating frequency. Wherein the larger the temperature difference, the larger the difference between the determined operating frequency and the current operating frequency. Thus, the larger the amount of change in the power of the compressor is, the larger the amount of change in the temperature of the compressor is.
For example, the air conditioner may determine a first frequency difference corresponding to the currently calculated temperature difference based on the set correspondence between the temperature difference and the frequency difference, and increase the operating frequency of the compressor by the first frequency difference based on the current operating frequency. The larger the temperature difference, the larger the corresponding first frequency difference.
In another possible implementation manner, the air conditioner calculates the product of the first setting coefficient and the rated frequency of the compressor; the air conditioner controls the compressor to increase the working frequency by taking the product as a step length so as to enable the compressor to operate at the adjusted working frequency.
In practical applications, the first setting coefficient may be 0.05.
Step 103: and when the working frequency of the compressor is greater than or equal to the set threshold value, reducing the opening degree of a throttling element in the air conditioner.
Here, when the difference between the temperature of the compressor in the air conditioner and the temperature of the heat exchanger is in a set range and the operating frequency of the compressor in the air conditioner is greater than or equal to a set threshold, the opening degree of the throttling element in the air conditioner is reduced to reduce the flow rate of the refrigerant, so as to increase the pressure in the compressor, thereby increasing the power of the compressor and further increasing the temperature of the compressor.
In order to improve the accuracy of controlling the throttling element, in some embodiments, the reducing the opening degree of the throttling element in the air conditioner comprises:
reducing the opening degree of a throttling element in the air conditioner based on a second parameter; wherein,
the second parameter includes at least one of:
setting a second step length;
the difference between the temperature of the compressor and the temperature of the heat exchanger;
the product of the second setting factor and the nominal opening of the throttling element; the second setting coefficient is greater than 0 and less than 1.
Here, in one possible implementation, the air conditioner decreases the opening degree of the throttling element in the air conditioner by a second set step. That is, the air conditioner decreases the second setting step size on the basis of the current opening degree of the throttling element.
In another possible implementation, the air conditioner subtracts the temperature of the heat exchanger from the temperature of the compressor to obtain a temperature difference, and the opening degree of a throttling element in the air conditioner is reduced based on the temperature difference.
For example, the air conditioner may determine a first opening degree corresponding to the currently calculated temperature difference based on the set correspondence between the temperature difference and the opening degree, and reduce the opening degree of the throttling element from the current opening degree to the determined first opening degree. Wherein the larger the temperature difference, the larger the difference between the first opening degree and the current opening degree. As a result, the amount of change in the power of the compressor is increased, and the amount of change in the temperature of the compressor is increased.
For example, the air conditioner may determine a first opening difference value corresponding to the currently calculated temperature difference based on the set correspondence between the temperature difference and the opening difference value, and decrease the opening of the throttling element by the first opening difference value based on the current opening. The larger the temperature difference, the larger the corresponding first opening difference value.
In another possible implementation, the air conditioner calculates a product between the second setting factor and a nominal opening of the throttling element, decreases the opening of the throttling element by steps of the product, and controls the throttling element to operate at the adjusted opening.
In practical applications, the first setting coefficient may be 0.05, but may have other values.
In some embodiments, after increasing the operating frequency of the compressor, or after decreasing the opening of a throttling element in the air conditioner, the method further comprises:
after the first period of operation, the temperature of the compressor and the temperature of the heat exchanger are obtained (step 100), and step 101 is performed.
Considering that the temperature of the compressor does not change immediately after the operating frequency of the compressor is increased or after the opening degree of the throttling element is reduced, but it takes a while to prevent frequent adjustment of the operating frequency of the compressor or the opening degree of the throttling element, in practical applications, the air conditioner determines whether the air conditioner has been operated for a first time period after the operating frequency of the compressor is increased or after the opening degree of the throttling element in the air conditioner is reduced, acquires the temperature of the compressor and the temperature of the heat exchanger after the air conditioner is operated for the first time period (step 100), and performs steps 101, 102 and 103; that is, step 100, step 101, step 102, and step 103 are steps that are executed cyclically.
In practical applications, the first time period may be 3 minutes.
In the embodiment of the application, when the refrigerant is set to migrate, the set range corresponding to the temperature difference between the compressor and the heat exchanger is set, under the condition that the air conditioner is in the running state, when the temperature difference between the temperature of the compressor and the temperature of the heat exchanger is in the set range, the power of the compressor is increased by increasing the working frequency of the compressor or reducing the opening degree of a throttling element in the air conditioner, so that the temperature of the compressor is increased, because the temperature increasing speed of the compressor is greater than the temperature increasing speed of the heat exchanger, the difference between the temperature of the compressor and the temperature of the heat exchanger can be reduced, finally, the temperature of the compressor is greater than the temperature of the heat exchanger, and further, the refrigerant is prevented from migrating from the heat exchanger to the compressor, so that the probability that lubricating oil of the compressor is diluted by the refrigerant is prevented, the wear resistance of the compressor is improved, and the reliability of the system is improved.
Fig. 3 is a schematic implementation flow chart of a method for controlling an air conditioner according to an embodiment of the present application. Wherein, the main execution body of the process is an air conditioner. As shown in fig. 3, the method of controlling an air conditioner includes:
step 301: and after the air conditioner is started and operates for a first set time, acquiring the temperature of the compressor and the temperature of the heat exchanger.
Acquiring the temperature of a compressor and the temperature of an outdoor heat exchanger under the condition that an air conditioner is in a refrigeration mode or a dehumidification mode; under the condition that the air conditioner is in a heating mode, the temperature of a compressor and the temperature of an indoor heat exchanger of the air conditioner are obtained. In practical applications, the first set time period may be 15 minutes.
Step 302: and judging whether the difference between the temperature of the compressor and the temperature of the heat exchanger is in a set range.
Here, when the difference between the temperature of the compressor and the temperature of the heat exchanger is within the set range, step 303 is executed; if the difference between the temperature of the compressor and the temperature of the heat exchanger is not within the set range, step 301 is executed to obtain the temperature of the compressor and the temperature of the heat exchanger.
Step 303: and judging whether the working frequency of the compressor is less than a set threshold value.
If the operating frequency of the compressor is less than the set threshold, executing step 304; in case the operating frequency of the compressor is equal to or greater than the set threshold, step 305 is performed.
Step 304: and increasing the working frequency of the compressor and operating for a second set time.
Here, in the case where the compressor is operated at the increased operating frequency for a second set time period, step 301 is performed to acquire the temperature of the compressor and the temperature of the heat exchanger.
In practical applications, the second set time period may be 3 minutes.
Step 305: and reducing the opening of a throttling element in the air conditioner, and operating for a second set time period.
Here, in the case where the throttling element is operated at the reduced opening degree for a second set period of time, step 201 is performed to acquire the temperature of the compressor and the temperature of the heat exchanger.
In order to implement the method for controlling an air conditioner according to an embodiment of the present application, an embodiment of the present application further provides an air conditioner, as shown in fig. 4, the air conditioner including:
a detecting unit 41, configured to detect whether an operating frequency of a compressor in an air conditioner is less than a set threshold value when a difference between a temperature of the compressor and a temperature of a heat exchanger is within a set range;
a first control unit 42 for raising the operating frequency of the compressor when the operating frequency of the compressor is less than the set threshold;
a second control unit 43 for reducing the opening degree of a throttle element in the air conditioner when the operating frequency of the compressor is greater than or equal to the set threshold value.
In some embodiments, the first control unit 42 is specifically configured to: increasing an operating frequency of the compressor based on a first parameter; wherein,
the first parameter comprises at least one of:
a first set step length;
the difference between the temperature of the compressor and the temperature of the heat exchanger;
the product between the first set coefficient and the rated frequency of the compressor; the first setting coefficient is greater than 0 and less than 1.
In some embodiments, the second control unit 43 is specifically configured to: reducing the opening degree of a throttling element in the air conditioner based on a second parameter; wherein,
the second parameter includes at least one of:
setting a second step length;
the difference between the temperature of the compressor and the temperature of the heat exchanger;
the product of the second setting factor and the nominal opening of the throttling element; the second setting coefficient is greater than 0 and less than 1.
In some embodiments, the first boundary value of the set range is-15 ℃ and the second boundary value of the set range is 10 ℃.
In some embodiments, the detection unit 41 is specifically configured to: when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is smaller than or equal to zero, whether the working frequency of the compressor is smaller than a set threshold value or not is detected.
In some embodiments, the air conditioner further comprises:
the first acquisition unit is used for acquiring the temperature of the compressor and the temperature of the heat exchanger after the operation for a first time period after the working frequency of the compressor is increased or after the opening degree of a throttling element in the air conditioner is reduced, and triggering the detection unit 41 to detect whether the working frequency of the compressor is smaller than a set threshold value or not when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in a set range.
In some embodiments, the detection unit 41 is further configured to perform one of:
calculating a difference between a temperature of the compressor and a temperature of an outdoor heat exchanger in a case where the air conditioner is in a cooling mode or a dehumidifying mode;
and under the condition that the air conditioner is in a heating mode, calculating the difference between the temperature of the compressor and the temperature of an indoor heat exchanger.
In practical applications, each unit included in the air conditioner may be implemented by a processor in the air conditioner. Of course, the processor needs to run the program stored in the memory to implement the functions of the above-described program modules.
It should be noted that: in the air conditioner provided in the above embodiment, when the compressor or the throttling element in the air conditioner is controlled, only the division of the above program modules is exemplified, and in practical applications, the above processing may be distributed to different program modules according to needs, that is, the internal structure of the air conditioner may be divided into different program modules to complete all or part of the above described processing. In addition, the air conditioner and the control method embodiment of the air conditioner provided by the above embodiment belong to the same concept, and the specific implementation process thereof is described in detail in the method embodiment, and is not described again here.
Based on the hardware implementation of the program module, in order to implement the method of the embodiment of the present application, the embodiment of the present application further provides an air conditioner. Fig. 5 is a schematic diagram of a hardware component structure of an air conditioner according to an embodiment of the present application, and as shown in fig. 5, the air conditioner 5 includes:
a communication interface 51 capable of information interaction with other devices such as a remote controller and the like;
and the processor 52 is connected with the communication interface 51 to realize information interaction with other equipment, and is used for executing the control method of the air conditioner provided by one or more technical schemes when running a computer program. And the computer program is stored on the memory 53;
a compressor 54 for compressing and delivering a refrigerant;
an indoor heat exchanger 55 for condensing the refrigerant;
a throttling element 56 for controlling the flow of refrigerant;
an outdoor heat exchanger 57 for cooling and exchanging heat of the refrigerant to be cooled;
of course, in practice, the various components of the air conditioner are coupled together by a bus system 58. It will be appreciated that the bus system 58 is used to enable connected communication between these components. The bus system 58 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 58 in fig. 5.
The memory 53 in the embodiment of the present application is used to store various types of data to support the operation of the air conditioner. Examples of such data include: any computer program for operating on an air conditioner.
It will be appreciated that the memory 53 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a magnetic random access Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), synchronous Static Random Access Memory (SSRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), double Data Rate Synchronous Random Access Memory (ESDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), enhanced Synchronous Random Access Memory (DRAM), synchronous Random Access Memory (DRMBER), direct Memory bus Random Access Memory (RAM). The memory 53 described in embodiments herein is intended to comprise, without being limited to, these and any other suitable types of memory.
The method disclosed in the above embodiments of the present application may be applied to the processor 52, or implemented by the processor 52. Processor 52 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 52. The processor 52 described above may be a general purpose processor, DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or the like. Processor 52 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 53, and the processor 52 reads the program in the memory 53 and performs the steps of the method in combination with its hardware.
When the processor 52 executes the program, the process corresponding to the multi-core processor in each method according to the embodiment of the present application is implemented, and for brevity, no further description is given here.
In an exemplary embodiment, the present application further provides a storage medium, i.e., a computer storage medium, specifically a computer readable storage medium, for example, including a memory 53 storing a computer program, which can be executed by a processor 52 to complete the steps in the foregoing embodiments. The computer readable storage medium may be Memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only one logical function division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in the form of hardware, or in the form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes.
The technical means described in the embodiments of the present application may be arbitrarily combined without conflict.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A method of controlling an air conditioner, comprising:
when the difference between the temperature of a compressor and the temperature of a heat exchanger in the air conditioner is in a set range, detecting whether the working frequency of the compressor is smaller than a set threshold value or not;
when the working frequency of the compressor is smaller than the set threshold value, the working frequency of the compressor is increased;
and when the working frequency of the compressor is greater than or equal to the set threshold value, reducing the opening degree of a throttling element in the air conditioner.
2. The method of claim 1, wherein the raising the operating frequency of the compressor comprises:
increasing an operating frequency of the compressor based on a first parameter; wherein,
the first parameter comprises at least one of:
a first set step length;
the difference between the temperature of the compressor and the temperature of the heat exchanger;
the product between the first set coefficient and the rated frequency of the compressor; the first setting coefficient is greater than 0 and less than 1.
3. The method of claim 1, wherein reducing the opening of a throttling element in the air conditioner comprises:
reducing the opening degree of a throttling element in the air conditioner based on a second parameter; wherein,
the second parameter includes at least one of:
a second set step length;
the difference between the temperature of the compressor and the temperature of the heat exchanger;
the product of the second setting factor and the nominal opening of the throttling element; the second setting coefficient is greater than 0 and less than 1.
4. The method according to claim 1, characterized in that the first boundary value of the set range is-15 ℃ and the second boundary value of the set range is 10 ℃.
5. The method of claim 1, wherein after increasing the operating frequency of the compressor, or after decreasing an opening of a throttling element in the air conditioner, the method further comprises:
and after the air conditioner runs for a first time, acquiring the temperature of the compressor and the temperature of the heat exchanger, and executing the step of detecting whether the working frequency of the compressor is less than a set threshold value or not when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in a set range.
6. The method according to any one of claims 1 to 5, wherein the detecting whether the operating frequency of the compressor is less than a set threshold value when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in a set range comprises:
when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is smaller than or equal to zero, whether the working frequency of the compressor is smaller than a set threshold value or not is detected.
7. The method according to any one of claims 1 to 5, further comprising one of:
calculating a difference between a temperature of the compressor and a temperature of an outdoor heat exchanger in a case where the air conditioner is in a cooling mode or a dehumidifying mode;
and under the condition that the air conditioner is in a heating mode, calculating the difference between the temperature of the compressor and the temperature of an indoor heat exchanger.
8. An air conditioner, comprising:
the detection unit is used for detecting whether the working frequency of the compressor is smaller than a set threshold value or not when the difference between the temperature of the compressor and the temperature of the heat exchanger in the air conditioner is in a set range;
the first control unit is used for increasing the working frequency of the compressor when the working frequency of the compressor is smaller than the set threshold value;
and the second control unit is used for reducing the opening degree of a throttling element in the air conditioner when the working frequency of the compressor is greater than or equal to the set threshold value.
9. An air conditioner, comprising: a compressor, an indoor heat exchanger, a throttling element, an outdoor heat exchanger, a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any one of claims 1 to 7 when running the computer program.
10. A storage medium on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
CN202110720791.5A 2021-06-28 2021-06-28 Method for controlling air conditioner, air conditioner and storage medium Pending CN115597199A (en)

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CN202110720791.5A CN115597199A (en) 2021-06-28 2021-06-28 Method for controlling air conditioner, air conditioner and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110720791.5A CN115597199A (en) 2021-06-28 2021-06-28 Method for controlling air conditioner, air conditioner and storage medium

Publications (1)

Publication Number Publication Date
CN115597199A true CN115597199A (en) 2023-01-13

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Country Link
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