CN110332649B - Heating overload prevention control method and device for air conditioner and air conditioner - Google Patents

Heating overload prevention control method and device for air conditioner and air conditioner Download PDF

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Publication number
CN110332649B
CN110332649B CN201910624146.6A CN201910624146A CN110332649B CN 110332649 B CN110332649 B CN 110332649B CN 201910624146 A CN201910624146 A CN 201910624146A CN 110332649 B CN110332649 B CN 110332649B
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value
preset
air conditioner
heat exchanger
temperature
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CN110332649A (en
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应必业
陈伟
古汤汤
冷泠
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a heating overload prevention control method and device of an air conditioner and the air conditioner, relating to the technical field of air conditioners and comprising the steps of continuously detecting the temperature of an indoor heat exchanger coil during heating operation; controlling the running state of an outer fan according to the temperature of the coil pipe of the indoor heat exchanger, a preset first numerical value and a preset second numerical value; judging whether the compressor is overloaded and tripping; and when the compressor is judged to be overloaded and tripped, correcting the first numerical value. The invention judges whether the air-conditioning system is in a high-load state by detecting whether the compressor is in overload protection or not, thereby correcting the set value of the parameter triggering the external fan to stop running, ensuring the timeliness and the effectiveness of the start-stop protection of the external fan, avoiding the frequent overload trip of the compressor and realizing the heating overload prevention control of the air conditioner.

Description

Heating overload prevention control method and device for air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a heating overload prevention control method and device of an air conditioner and the air conditioner.
Background
Along with the improvement of living standard, the popularization rate of the air conditioner is higher and higher, people can use more spaces to carry out room temperature conditions, and a more comfortable working and living environment is created. When the air conditioner is used for heating in spring and autumn, the heating load is also higher due to higher indoor and outdoor temperature, and the conditions of high system pressure, overhigh exhaust temperature and the like are all unfavorable for the reliability of the air conditioner. The existing fixed-frequency air conditioner judges the temperature T of the coil pipe of the indoor heat exchangerInner discHigh and low ofThe intermittent on-off operation of the outer fan is controlled, so that the heating load is reduced.
For T triggering outer fan to stop runningInner discThe parameters are set to be too high and too low, the external fan cannot be stopped for unloading in time when the parameters are set to be too high, the overload protection effect is lost, and the normal heating effect of the air conditioner can be influenced when the parameters are set to be too low. While taking into account the versatility of the controller material, TInner discThe parameters typically cure to the same value. But cured T for different system configurations, or in the case of extended tubes at installationInner discThe parameter setting is not reasonable, the start and stop of an external fan cannot be triggered timely, the system is in high-load operation for a long time, and the compressor frequently protects the trip due to overload, so that the reliability and the heating comfort of the system are affected.
Disclosure of Invention
The invention solves the problem of dynamically correcting the preset temperature value of the coil pipe of the indoor heat exchanger and controlling the on-off of the outer fan to perform heating overload prevention control according to the preset value.
In order to solve the above problems, the present invention provides a heating overload prevention control method for an air conditioner, which includes:
during heating operation, continuously detecting the temperature of the coil pipe of the indoor heat exchanger;
controlling the running state of an outer fan according to the temperature of the coil pipe of the indoor heat exchanger, a preset first numerical value and a preset second numerical value;
judging whether the compressor is overloaded and tripping;
and when the compressor is judged to be overloaded and tripped, correcting the first numerical value.
The invention judges whether the air conditioning system is in a high load state by detecting whether the compressor is in overload protection or not, thereby correcting the set value of the temperature parameter of the coil pipe of the indoor heat exchanger triggering the outer fan to stop running so as to ensure the timeliness and effectiveness of the start-stop protection of the outer fan. The invention does not increase any hardware, and only judges whether the compressor is in overload protection by updating the control logic, thereby realizing the correction of the set value of the temperature parameter of the coil pipe of the indoor heat exchanger and avoiding the cost rise of the controller.
Further, the controlling the operation state of the external fan according to the temperature of the indoor heat exchanger coil, a preset first numerical value and a preset second numerical value comprises: when the temperature of the coil pipe of the indoor heat exchanger is larger than or equal to the first value, controlling the outer fan to stop running; when the temperature of the coil pipe of the indoor heat exchanger is less than or equal to the second value, controlling the outer fan to recover to operate; and when the temperature of the coil pipe of the indoor heat exchanger is greater than the second value and less than the first value, controlling the outer fan to keep running.
The invention correspondingly controls the start and stop of the outer fan according to the comparison result of the temperature of the coil pipe of the indoor heat exchanger and the preset value, thereby ensuring the effectiveness and reliability of the overload operation.
Further, the second value is obtained by subtracting a preset third value from the first value.
The invention sets a reasonable inner disc preset value adjusting interval, ensures the reasonable division of the temperature of the coil pipe of the indoor heat exchanger and accurately adjusts the outer fan to perform overload protection.
Further, the judging whether the compressor is overloaded and tripping comprises: and when the following conditions are simultaneously met, judging that the compressor is overloaded and tripped: the continuous running time of the compressor is greater than or equal to a preset fourth value; and the variation of the temperature of the coil of the indoor heat exchanger before the first time interval and the current temperature of the coil of the indoor heat exchanger is more than or equal to a preset fifth numerical value.
The invention judges whether the compressor is overloaded and trips according to the running time of the compressor and the temperature change condition of the coil pipe of the indoor heat exchanger in a period of time, thereby improving the accuracy of judgment.
Further, the modifying the first value comprises: and when the first numerical value is smaller than or equal to a preset sixth numerical value, correcting the first numerical value into the sixth numerical value.
The invention reasonably corrects the size of the inner disc preset value so as to more accurately perform overload prevention control.
Further, the modifying the first value comprises: and when the first value is larger than a sixth value, correcting the first value to be the subtraction of a preset seventh value from the first value.
The invention effectively adjusts the size of the preset value of the inner disc, can trigger the shutdown protection of the outer fan in time, realizes the effect of heating unloading and avoids the overload trip of the compressor.
Further, the method also comprises the following steps: and if the variation of the current temperature of the coil pipe of the indoor heat exchanger and the temperature of the coil pipe of the indoor heat exchanger before the second time interval is larger than or equal to a preset eighth numerical value, judging that the compressor is recovered to operate, comparing the temperature of the coil pipe of the indoor heat exchanger with the corrected first numerical value and second numerical value, and controlling the start and stop of the outer fan according to the comparison result.
The invention judges whether the compressor recovers the operation according to the temperature change condition of the coil pipe of the indoor heat exchanger in a period of time, and circularly executes the correction control of the preset value of the inner coil, thereby ensuring the normal operation of the system and preventing the overload from frequently jumping.
Another objective of the present invention is to provide a heating overload prevention control device for an air conditioner, so as to avoid frequent trip protection when the compressor is overloaded, and improve user experience.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a heating overload prevention control apparatus of an air conditioner, comprising:
the acquisition unit is used for continuously acquiring the temperature of the coil pipe of the indoor heat exchanger during heating operation;
the calculating unit is used for comparing the temperature of the indoor heat exchanger coil with a preset first numerical value and a preset second numerical value;
the system is also used for judging whether the compressor is overloaded and trips;
the control unit is used for controlling the running state of the external fan according to the comparison result;
and the controller is also used for correcting the first numerical value when judging that the compressor is overloaded and trips.
The invention gives consideration to the universality and the protection timeliness of the controller, judges whether the air conditioning system is in a high-load state by detecting whether the compressor is subjected to overload protection, and dynamically corrects the set value of the internal disc parameter, thereby controlling the start and stop of the external fan to perform overload protection and ensuring the effectiveness and the reliability of the overload protection.
The third objective of the present invention is to provide an air conditioner, which can avoid frequent shutdown when the heating operation overload is large.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the heating overload prevention control method of the air conditioner as described above.
Compared with the prior art, the heating overload prevention control device of the air conditioner has the same beneficial effects, and the details are not repeated.
A fourth object of the present invention is to provide a computer-readable storage medium to implement the above heating overload prevention control method for an air conditioner.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements a heating overload prevention control method of an air conditioner as described above.
Drawings
Fig. 1 is a schematic view illustrating a heating overload prevention control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a heating overload prevention control method of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a process of correcting an inner disc preset value according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a heating overload prevention control apparatus 400 of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Because the fixed frequency air conditioner can not adjust the running frequency of the compressor like a variable frequency air conditioner, the compressor can be overloaded and tripped for protection after being overloaded, and the damage caused by the long-time high-load running of the compressor is avoided. Therefore, when the fixed-frequency air conditioner operates in the heating mode, the unloading effect can be achieved by controlling the on-off of the outer fan, the normal pressure of the whole machine system is ensured, the frequent overload protection tripping of the compressor is avoided, and the heating comfort and the system reliability are improved.
Fig. 1 is a schematic diagram illustrating a heating overload prevention control method of an air conditioner according to an embodiment of the present invention, including steps S11 to S16.
In step S11, it is determined that the air conditioner has operated in the heating mode.
In step S12, the outside air blower is controlled to be on.
In step S13, the indoor heat exchanger coil temperature T is constantly detected using a temperature sensor located at the indoor heat exchanger coilInner discAnd determining TInner discIf the value is greater than the first predetermined value, step S15 is executed, otherwise step S14 is executed. The preset first value is an inner disc preset value, the running state of the outer fan is controlled according to the value, and the inner disc preset value can be set to be different values according to different machine types.
In step S14, T is judgedInner discAnd if the current value is greater than the preset second value, executing a step S12 to control the outer fan to recover to operate, otherwise executing a step S16. And if the third value is the first value minus the third value, the second value is the return difference between the inner disc preset value and the inner disc preset value.
In step S15, the operation of the external air blower is controlled to be stopped. When T isInner discAnd stopping the operation of the outer fan when the inner disc preset value is not less than the preset value.
In step S16, the outer fan is controlled to remain as it is. Namely when the return difference between the preset value of the inner disc and the preset value of the inner disc is less than TInner discWhen the air flow is less than the preset value of the inner disc, the running state of the outer fan is kept unchanged.
In the embodiment of the invention, the preset value of the inner disk can be dynamically corrected, so that the system can not only control the start and stop of the outer fan according to the solidified uniform parameters any more, can adapt to more variable working conditions, and has stronger regulating capability.
Fig. 2 is a flowchart illustrating a heating overload prevention control method of an air conditioner according to an embodiment of the present invention, including steps S21 to S24.
In step S21, during heating operation, the indoor heat exchanger coil temperature is continuously detected. The temperature of the coil pipe of the indoor heat exchanger can better reflect the operating temperature of the system, and the temperature can be used for controlling the start and stop of the outer fan to be more accurately adjusted, so that effective and reliable overload prevention control is realized.
In step S22, the operation state of the external fan is made according to the indoor heat exchanger coil temperature, the preset first value and the second value.
In step S23, it is determined whether the compressor has tripped due to overload.
In step S24, when it is judged that the compressor is in overload trip, the first value is corrected. The first value is an inner disc preset value, and the second value is the return difference of the inner disc preset value minus the inner disc preset value.
In the embodiment of the invention, when the following conditions are simultaneously met, the compressor is judged to be overloaded and tripped:
the continuous running time of the compressor is greater than or equal to a fourth value;
Tinner disc n-1-TInner discGreater than or equal to a fifth value.
Wherein, TInner discIs the coil temperature, T, of the indoor heat exchanger at the current momentInner disc n-1For the last moment of the coil temperature of the indoor heat exchanger, in the embodiment of the invention, T is recorded every minuteInner discThen T isInner disc n-1The indoor heat exchanger coil temperature was 1 minute ago.
The preset fourth value is a preset value of continuous operation time of the compressor, and the preset fifth value is a preset value of inner disc descending. According to the embodiment of the invention, whether the overload prevention control is needed or not is judged only after the compressor runs for a period of time, and energy loss caused by early judgment can be avoided by setting a reasonable preset value of the continuous running time of the compressor, and the phenomenon that the compressor is overloaded and trips because of late judgment can also be avoided. And judging that the temperature of the coil pipe of the indoor heat exchanger is reduced by a certain value within a certain time period according to the set inner plate reduction preset value, and judging that the compressor stops running at the moment.
And when the compressor runs for a certain time and the temperature of the coil pipe of the indoor heat exchanger drops beyond a certain range, judging that the compressor is overloaded and the trip stops running. At the moment, the preset value of the inner disk needs to be corrected, and the preset value is adjusted to a reasonable value, so that the shutdown protection of the outer fan can be triggered early. When the external fan is stopped, outdoor heat exchange becomes poor, evaporation pressure is reduced, and condensation pressure is reduced, so that the heating unloading effect is realized, and overload trip is avoided.
FIG. 3 is a schematic flow chart illustrating a process of correcting the default value of the inner disc according to an embodiment of the present invention, which includes steps S31-S36.
In step S31, it is determined that the air conditioner has operated in the heating mode.
In step S32, it is determined whether the compressor is overloaded and tripped according to the above rule, i.e. whether the continuous operation time of the compressor is greater than the fourth value, and T isInner disc n-1-TInner discIf the value is larger than or equal to the fifth numerical value, the step S33 is executed, otherwise, the air conditioner is kept running. Namely when the continuous operation time of the compressor is more than or equal to the preset value of the continuous operation time of the compressor and T is less than or equal toInner disc n-1-TInner discAnd executing the step S33 when the inner disc drop preset value is not less than the preset value.
In step S33, it is determined whether the current inner disc preset value is less than or equal to a preset sixth value, if so, step S34 is executed, otherwise, step S35 is executed. Wherein, the sixth value is the preset minimum value of the inner disc.
In step S34, when the current inner disc preset value is less than or equal to the sixth value, the inner disc preset value is corrected to the sixth value, so as to avoid the influence of the excessively small inner disc preset value on the normal operation of the air conditioner.
In step S35, when the current inner disc preset value is greater than the sixth value, the inner disc preset value is corrected to be the current inner disc preset value minus the seventh value. In the embodiment of the present invention, the seventh numerical value is 2. In other embodiments of the present invention, the current inner disc preset value may also be divided into a plurality of intervals, and the adjustment value (i.e., the seventh value) corresponding to each interval is different, for example, when the current inner disc preset value is larger, the seventh value may be set to be a larger value, e.g., 3 to 5, etc., so as to trigger the outer fan to stop operating as soon as possible; and when the current inner disc preset value is smaller, the seventh numerical value can be set to be a smaller numerical value such as 1, the running state of the outer fan can be controlled more accurately, and energy loss caused by over-regulation is avoided.
In step S36, T is judgedInner disc-TInner disc n-1And if the value is larger than or equal to the preset eighth value, judging that the compressor is recovered to operate, and executing the step S32, otherwise, judging that the compressor is not recovered to operate, and continuously waiting for a period of time and then repeating the step S36 to judge whether the compressor is recovered to operate. And when the temperature of the coil pipe of the heat exchanger in the chamber rises to exceed a certain range within a period of time, judging that the compressor is restored to operate.
That is, T is constantly detected in the state that the compressor is judged to be overloaded and trippedInner discWhen the following conditions are met, the compressor is confirmed to be recovered to operate, and the inner disc preset value is circularly corrected to realize overload prevention control:
Tinner disc-TInner disc n-1The inner disc rises more than or equal to a preset value.
That is, when the variation of the temperature of the coil of the heat exchanger in the chamber exceeds a certain range within a certain period of time (for example, 1 minute), the compressor is judged to be restored to operation. In the embodiment of the invention, the compressor resumes the startup operation according to the preset program after the overload trip. In other embodiments of the invention, different trigger conditions can be set to control the compressor to recover to operate after the overload trip.
In the embodiment of the invention, after the compressor is judged to be operated again, the temperature of the coil pipe of the indoor heat exchanger is compared with the corrected preset value of the inner plate, and the start and stop of the outer fan are controlled according to the comparison result, so that compared with the state before correction, the stop protection of the outer fan is triggered in advance, the heating unloading effect is realized, and the phenomenon that the compressor is frequently overloaded and jumped to influence the user experience is avoided.
In the embodiment of the invention, the value range of the inner disc preset value (first value) can be 53-57 ℃; the value range of the return difference (third value) of the preset value of the inner disc can be 1-3 ℃; the value range of the preset value (fourth value) of the continuous operation time of the compressor can be 30-180 s; the value range (the fifth value) of the inner disc descending preset value can be 4-8 ℃; the value range of the preset minimum value (sixth value) of the inner disc can be 51-53 ℃; the value range of the inner disc rising preset value (eighth numerical value) can be 4-8 ℃. The value ranges of the above numerical values can be obtained according to experimental data or set according to experience, and are not limited to this.
In other embodiments of the present invention, in order to avoid a certain error or delay between the temperature of the indoor heat exchanger coil detected by the temperature sensor and the actual temperature, the temperatures of the indoor heat exchanger coil detected within a period of time may be subjected to preprocessing of adding and then averaging, so as to ensure the accuracy of the temperature of the indoor heat exchanger coil.
Fig. 4 is a schematic structural view illustrating a heating overload prevention control apparatus 400 of an air conditioner according to an embodiment of the present invention. The system comprises an acquisition unit 401, a calculation unit 402 and a control unit 403, wherein the acquisition unit 401 is used for continuously acquiring the temperature of the coil of the indoor heat exchanger during heating operation; the computing unit 402 is configured to compare the indoor heat exchanger coil temperature with a preset first value and a preset second value; the system is also used for judging whether the compressor is overloaded and trips; the control unit 403 is configured to control an operating state of the external fan according to the comparison result; and the controller is also used for correcting the first numerical value when judging that the compressor is overloaded and trips.
In the embodiment of the invention, when the compressor is judged to be in operation again, the calculation unit compares the temperature of the coil pipe of the indoor heat exchanger with the corrected first numerical value and the second numerical value, and the control unit controls the on-off of the external fan according to the comparison result.
The invention judges whether the air conditioning system is in a high load state by detecting whether the compressor is in overload protection, dynamically corrects the inner disc preset value, controls the start and stop of the outer fan according to the corrected inner disc preset value to perform overload protection, and ensures the effectiveness and reliability of the overload protection. The invention also gives consideration to the universality and the protection timeliness of the controller, does not increase other hardware and saves the cost.
The embodiment of the invention also provides an air conditioner, and the heating overload prevention control device of the air conditioner is adopted to dynamically correct the preset value of the inner disc according to the overload trip state of the compressor, so that the on-off state of the external fan is controlled, the external fan is protected in advance, the frequent trip of the compressor is avoided, and the aim of heating overload prevention control is fulfilled.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is read and executed by a processor, the method for controlling heating overload protection of an air conditioner as described above is implemented.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A heating overload prevention control method of an air conditioner is characterized by comprising the following steps:
during heating operation, continuously detecting the temperature of the coil pipe of the indoor heat exchanger;
controlling the running state of an outer fan according to the temperature of the coil pipe of the indoor heat exchanger, a preset first numerical value and a preset second numerical value;
judging whether the compressor is overloaded and tripping;
and when the compressor is judged to be overloaded and tripped, correcting the first numerical value.
2. The heating overload prevention control method of an air conditioner according to claim 1, wherein the controlling of the operation state of the outdoor fan according to the indoor heat exchanger coil temperature, a preset first value and a preset second value includes: when the temperature of the coil pipe of the indoor heat exchanger is larger than or equal to the first value, controlling the outer fan to stop running; when the temperature of the coil pipe of the indoor heat exchanger is less than or equal to the second value, controlling the outer fan to recover to operate; and when the temperature of the coil pipe of the indoor heat exchanger is greater than the second value and less than the first value, controlling the outer fan to keep running.
3. The heating overload prevention control method of an air conditioner according to claim 1, wherein the second value is the first value minus a preset third value.
4. The heating overload prevention control method of an air conditioner according to claim 1, wherein the judging whether the compressor is overloaded and tripped comprises: and when the following conditions are simultaneously met, judging that the compressor is overloaded and tripped: the continuous running time of the compressor is greater than or equal to a preset fourth value; and the variation of the temperature of the coil of the indoor heat exchanger before the first time interval and the current temperature of the coil of the indoor heat exchanger is more than or equal to a preset fifth numerical value.
5. The heating overload prevention control method of an air conditioner according to claim 1, wherein the correcting the first value includes: and when the first value is less than or equal to a preset inner disc preset minimum value, correcting the first value to be the inner disc preset minimum value.
6. The heating overload prevention control method of an air conditioner according to claim 1, wherein the correcting the first value includes: and when the first value is larger than a sixth value, correcting the first value to be the subtraction of a preset seventh value from the first value.
7. The heating overload prevention control method of an air conditioner according to claim 1, further comprising: and if the current variation of the temperature of the coil pipe of the indoor heat exchanger and the temperature of the coil pipe of the indoor heat exchanger before the second time interval is larger than or equal to a preset eighth numerical value, judging that the compressor is recovered to operate, comparing the temperature of the coil pipe of the indoor heat exchanger with the corrected first numerical value and second numerical value, and controlling the start and stop of the outer fan according to the comparison result.
8. A heating overload prevention control apparatus of an air conditioner, comprising:
the acquisition unit is used for continuously acquiring the temperature of the coil pipe of the indoor heat exchanger during heating operation;
the calculating unit is used for comparing the temperature of the indoor heat exchanger coil with a preset first numerical value and a preset second numerical value;
the system is also used for judging whether the compressor is overloaded and trips;
the control unit is used for controlling the running state of the external fan according to the comparison result;
and the controller is also used for correcting the first numerical value when judging that the compressor is overloaded and trips.
9. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the heating overload prevention control method of the air conditioner according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when read and executed by a processor, implements the heating overload prevention control method of an air conditioner according to any one of claims 1 to 7.
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CN112856744B (en) * 2019-11-28 2022-09-27 广东美的制冷设备有限公司 Control method and device of air conditioner, air conditioner and readable storage medium
CN111059709A (en) * 2019-12-31 2020-04-24 海信（山东）空调有限公司 Control method of air conditioner and air conditioner
CN111878971A (en) * 2020-06-30 2020-11-03 宁波奥克斯电气股份有限公司 Air conditioner control method and device and air conditioner
CN114251803B (en) * 2020-09-22 2023-03-31 广东美的精密模具科技有限公司 Air conditioner, air conditioner control method and device and readable storage medium
CN113834179B (en) * 2021-09-30 2023-03-07 宁波奥克斯电气股份有限公司 Control method and device of fixed-frequency air conditioner, storage medium and air conditioner

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CN107421062A (en) * 2017-07-10 2017-12-01 广东美的暖通设备有限公司 Air-conditioning system, modification method and computer-readable recording medium can be needed

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JPS54135444A (en) * 1978-04-11 1979-10-20 Hitachi Ltd Air conditioner
JPS5612946A (en) * 1979-07-10 1981-02-07 Toshiba Corp Air conditioning device
JP2002061968A (en) * 2000-08-23 2002-02-28 Zexel Valeo Climate Control Corp Controller of freezing cycle
CN101526257A (en) * 2009-03-26 2009-09-09 宁波海诚电器有限公司 Method for protecting compressor when air conditioner makes heat in high temperature environment
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