CN114811826A - Control method and device of air conditioning system, air conditioning system and storage medium - Google Patents

Control method and device of air conditioning system, air conditioning system and storage medium Download PDF

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Publication number
CN114811826A
CN114811826A CN202210343930.1A CN202210343930A CN114811826A CN 114811826 A CN114811826 A CN 114811826A CN 202210343930 A CN202210343930 A CN 202210343930A CN 114811826 A CN114811826 A CN 114811826A
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conditioning system
air conditioning
frequency
refrigeration
stage
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CN202210343930.1A
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CN114811826B (en
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张珊珊
刘金矿
吴会丽
林小江
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • 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
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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

Abstract

The invention discloses a control method and a control device of an air conditioning system, the air conditioning system and a storage medium, wherein the method comprises the following steps: acquiring the current running time of a compressor of the air-conditioning system, and acquiring a working time threshold of the air-conditioning system; an operating time threshold for an air conditioning system comprising: an operating time threshold; determining whether a current run time of the compressor has reached a run time threshold; if the current running time of the compressor reaches a running time threshold, acquiring the pipe temperature of the indoor heat exchanger, and acquiring a pipe temperature threshold of the indoor heat exchanger in a refrigeration mode; and controlling the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger and the pipe temperature threshold value of the indoor heat exchanger under the refrigeration mode. According to the scheme, the anti-freezing protection threshold value is adjusted according to the running condition of the air conditioning system, so that frequent frequency limiting and reducing, frequent anti-freezing protection and the like can be avoided in the running process of the air conditioning system, and the comfort of a user is improved.

Description

Control method and device of air conditioning system, air conditioning system and storage medium
Technical Field
The invention belongs to the technical field of air conditioning systems, and particularly relates to a control method and device of an air conditioning system, the air conditioning system and a storage medium, and particularly relates to a control method and device of a variable anti-freezing protection threshold parameter of the air conditioning system, the air conditioning system and the storage medium.
Background
The anti-freezing protection is a functional protection for preventing an evaporator pipe from running too low in temperature, an evaporator from frosting in the refrigerating process, the air supply quantity is reduced and the refrigerating effect is poor when an indoor unit of the air conditioning system runs in a refrigerating mode, but frequent anti-freezing protection can also cause incomplete evaporation of a refrigerant of an indoor evaporator, the risk of air suction and liquid entrainment in the running process of a compressor can be caused, liquid impact abrasion of the compressor can be increased after long-term running, and the reliability and the service life of the compressor can be reduced.
The threshold value design of the anti-freezing protection in some schemes is a fixed value, the anti-freezing protection can not be avoided occasionally in actual operation, frequent frequency limiting and frequency reducing and frequent anti-freezing protection can influence the refrigeration effect, and the comfort is poor.
The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.
Disclosure of Invention
The invention aims to provide a control method and a control device of an air conditioning system, the air conditioning system and a storage medium, so as to solve the problem that the use comfort of a user is affected by frequent frequency limiting and reducing, frequent anti-freezing protection and the like of the air conditioning system in the operation process under the condition that the anti-freezing protection threshold of the air conditioning system is a fixed value, achieve the purpose that the frequent frequency limiting and reducing, frequent anti-freezing protection and the like of the air conditioning system in the operation process can be avoided by adjusting the anti-freezing protection threshold according to the operation condition of the air conditioning system, and be beneficial to improving the use comfort of the user.
The invention provides a control method of an air conditioning system, which comprises the following steps: under the condition that the air-conditioning system works in a refrigeration mode, acquiring the current running time of a compressor of the air-conditioning system, and acquiring a working time threshold of the air-conditioning system; the working time threshold of the air conditioning system comprises the following steps: a run time threshold for the compressor; wherein the running time threshold of the compressor is a time threshold for determining whether the air conditioning system enters anti-freezing protection; determining whether a current run time of the compressor has reached a run time threshold of the compressor; if the current running time of the compressor reaches the running time threshold of the compressor, acquiring the pipe temperature of an indoor heat exchanger of the air-conditioning system, and acquiring the pipe temperature threshold of the indoor heat exchanger of the air-conditioning system in the refrigeration mode; controlling the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold value of the indoor heat exchanger under the refrigeration mode; the different working phases in the cooling mode comprise: at least one stage of an anti-freezing protection stage, a frequency limiting refrigeration stage, a frequency reducing refrigeration stage and a normal refrigeration stage.
In some embodiments, the indoor heat exchanger tube temperature threshold in the cooling mode includes: freezing protection inner tube temperature threshold, frequency limiting inner tube temperature threshold and frequency limiting recovery inner tube temperature threshold; controlling the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger under the refrigeration mode, wherein the working stages comprise: the working time threshold of the air conditioning system further comprises: a detection time threshold of the indoor heat exchanger tube temperature; within the detection time threshold of the indoor heat exchanger tube temperature, if the indoor heat exchanger tube temperature of the air conditioning system is less than or equal to the freezing protection inner tube temperature threshold, controlling the air conditioning system to work in an anti-freezing protection stage under the refrigeration mode; if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the frequency-limiting inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency-limiting recovery inner tube, controlling the air-conditioning system to work in a frequency-limiting refrigeration stage under the refrigeration mode; in the frequency-limited refrigeration stage in the refrigeration mode, the frequency of a compressor of the air conditioning system maintains the current operating frequency; if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the freezing protection inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency limiting inner tube, controlling the air-conditioning system to work in a frequency reduction refrigeration stage under the refrigeration mode; in the stage of frequency reduction refrigeration in the refrigeration mode, the frequency of a compressor of the air conditioning system is reduced by a first set frequency according to a first set speed on the basis of the current operating frequency; and if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the temperature threshold of the freezing protection inner tube, controlling the air conditioning system to work in a normal refrigeration stage under the refrigeration mode.
In some embodiments, controlling the air conditioning system to operate in the freeze protection phase in the cooling mode includes: controlling a compressor of the air conditioning system to stop, controlling an outdoor fan of the air conditioning system to stop in a delayed mode, and increasing the wind level of an indoor fan of the air conditioning system; wherein, heighten the windshield of the indoor fan of the air conditioning system includes: if the current wind gear of the indoor fan of the air-conditioning system is the highest wind gear, keeping the wind gear of the indoor fan of the air-conditioning system at the current wind gear; if the current wind gear of the indoor fan of the air-conditioning system is not the highest wind gear, the wind gear of the indoor fan of the air-conditioning system is increased to a set gear on the basis of the current wind gear; and if the pipe temperature of the indoor heat exchanger of the air-conditioning system is greater than the temperature threshold of the frequency limiting recovery inner pipe and the compressor downtime of the air-conditioning system reaches the set downtime, controlling the air-conditioning system to recover to the normal refrigeration stage under the refrigeration mode.
In some embodiments, further comprising: after controlling the air conditioning system to work in different working stages under the refrigeration mode, according to a set interval period, continuing to control the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger under the refrigeration mode.
In some embodiments, further comprising: after the current running time of the compressor reaches a running time threshold of the compressor, in the process of controlling the air conditioning system to work in different working stages in the refrigeration mode, adjusting at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the refrigeration mode according to the stage of the air conditioning system which works in the different working stages in the refrigeration mode; wherein, according to the stage that the air conditioning system has worked in different working stages under the refrigeration mode, adjust at least one of the working time threshold of the air conditioning system, the indoor heat exchanger tube temperature threshold of the air conditioning system under the refrigeration mode, include: if the stage of the air conditioning system working in different working stages in the refrigeration mode is a frequency limiting refrigeration stage, reducing the frequency limiting recovery inner tube temperature threshold value in the temperature threshold value of the indoor heat exchanger tube in the refrigeration mode by a first set temperature value; if the working stages of the air conditioning system in different working stages in the refrigeration mode are a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the temperature threshold of the frequency limiting inner tube in the temperature threshold of the tube of the indoor heat exchanger in the refrigeration mode by a second set temperature value; if the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reduction refrigeration stage, increasing the frequency reduction amplitude of the frequency of a compressor of the air conditioning system by a set frequency threshold value in the frequency reduction refrigeration stage in the refrigeration mode; the frequency reduction amplitude of the compressor frequency of the air conditioning system is the amplitude of the compressor frequency of the air conditioning system which is reduced by a first set frequency on the basis of the current running frequency.
In some embodiments, adjusting at least one of an operating time threshold of the air conditioning system and an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to the stage of the air conditioning system operating in the different operating stages in the cooling mode further comprises: under the condition that the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, after the frequency reducing amplitude of the frequency of a compressor of the air conditioning system is increased by a set frequency threshold, adjusting at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the refrigeration mode according to a continuous running period of the air conditioning system running according to a set interval period; wherein, according to the continuous operation cycle of the air conditioning system operating according to the set interval cycle, at least one of the working time threshold of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger of the air conditioning system in the refrigeration mode is adjusted, including: under the condition that the continuous operation period is a first set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a third set temperature value for the temperature threshold value of the frequency limiting inner tube in the temperature threshold value of the indoor heat exchanger tube in the refrigeration mode; when the continuous operation period is a second set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air conditioning system by a first set time value; when the continuous operation period is a third set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air conditioning system by a second set time value; under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a detection time threshold value in working time threshold values of the air-conditioning system by a third set time value; and under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing the detection time threshold value in the working time threshold values of the air-conditioning system by a fourth set time value.
In accordance with the above method, another aspect of the present invention provides a control apparatus for an air conditioning system, comprising: the air conditioning system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is configured to acquire the current running time of a compressor of the air conditioning system and acquire the working time threshold of the air conditioning system under the condition that the air conditioning system works in a cooling mode; the working time threshold of the air conditioning system comprises the following steps: a run time threshold for the compressor; the running time threshold of the compressor is a time threshold used for determining whether the air conditioning system enters anti-freezing protection; a control unit configured to determine whether a current operation time of the compressor has reached an operation time threshold of the compressor; the obtaining unit is further configured to obtain an indoor heat exchanger tube temperature of the air conditioning system and obtain an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode if the current running time of the compressor reaches the running time threshold of the compressor; the control unit is further configured to control the air conditioning system to work in different working stages in the cooling mode according to the indoor heat exchanger tube temperature of the air conditioning system and the indoor heat exchanger tube temperature threshold in the cooling mode; the different working phases in the cooling mode comprise: at least one stage of an anti-freezing protection stage, a frequency limiting refrigeration stage, a frequency reducing refrigeration stage and a normal refrigeration stage.
In some embodiments, the indoor heat exchanger tube temperature threshold in the cooling mode includes: freezing protection inner tube temperature threshold, frequency limiting inner tube temperature threshold and frequency limiting recovery inner tube temperature threshold; the control unit controls the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger under the refrigeration mode, and the control unit comprises: the working time threshold of the air conditioning system further comprises: a detection time threshold of the indoor heat exchanger tube temperature; within the detection time threshold of the indoor heat exchanger tube temperature, if the indoor heat exchanger tube temperature of the air conditioning system is less than or equal to the freezing protection inner tube temperature threshold, controlling the air conditioning system to work in an anti-freezing protection stage under the refrigeration mode; if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the frequency-limiting inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency-limiting recovery inner tube, controlling the air-conditioning system to work in a frequency-limiting refrigeration stage under the refrigeration mode; in the frequency-limited refrigeration stage in the refrigeration mode, the frequency of a compressor of the air conditioning system maintains the current operating frequency; if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the freezing protection inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency limiting inner tube, controlling the air-conditioning system to work in a frequency reduction refrigeration stage under the refrigeration mode; in the stage of frequency reduction refrigeration in the refrigeration mode, the frequency of a compressor of the air conditioning system is reduced by a first set frequency according to a first set speed on the basis of the current operating frequency; and if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the temperature threshold of the freezing protection inner tube, controlling the air conditioning system to work in a normal refrigeration stage under the refrigeration mode.
In some embodiments, the control unit, controlling the air conditioning system to work in the anti-freezing protection phase in the cooling mode, includes: controlling a compressor of the air conditioning system to stop, controlling an outdoor fan of the air conditioning system to stop in a delayed mode, and increasing the wind level of an indoor fan of the air conditioning system; wherein, heighten the windshield of the indoor fan of the air conditioning system includes: if the current wind gear of the indoor fan of the air-conditioning system is the highest wind gear, keeping the wind gear of the indoor fan of the air-conditioning system at the current wind gear; if the current wind gear of the indoor fan of the air-conditioning system is not the highest wind gear, the wind gear of the indoor fan of the air-conditioning system is increased to a set gear on the basis of the current wind gear; and if the pipe temperature of the indoor heat exchanger of the air-conditioning system is greater than the temperature threshold of the frequency limiting recovery inner pipe and the compressor downtime of the air-conditioning system reaches the set downtime, controlling the air-conditioning system to recover to the normal refrigeration stage under the refrigeration mode.
In some embodiments, further comprising: the control unit is further configured to, after controlling the air conditioning system to operate in different operating stages in the cooling mode, continue to control the air conditioning system to operate in different operating stages in the cooling mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger in the cooling mode at set interval periods.
In some embodiments, further comprising: the control unit is further configured to adjust at least one of an operating time threshold of the air conditioning system and an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to the stage of the air conditioning system operated in the different operating stages in the cooling mode in the process of controlling the air conditioning system to operate in the different operating stages in the cooling mode after the current operating time of the compressor reaches the operating time threshold of the compressor; wherein the control unit adjusts at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the cooling mode according to a stage in which the air conditioning system has worked in different working stages in the cooling mode, and includes: if the stage of the air conditioning system working in different working stages in the refrigeration mode is a frequency limiting refrigeration stage, reducing the temperature threshold of the frequency limiting recovery inner tube in the temperature threshold of the tube of the indoor heat exchanger in the refrigeration mode by a first set temperature value; if the working stages of the air conditioning system in different working stages in the refrigeration mode are a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the temperature threshold of the frequency limiting inner tube in the temperature threshold of the tube of the indoor heat exchanger in the refrigeration mode by a second set temperature value; if the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reduction refrigeration stage, increasing the frequency reduction amplitude of the frequency of a compressor of the air conditioning system by a set frequency threshold value in the frequency reduction refrigeration stage in the refrigeration mode; the frequency reduction amplitude of the compressor frequency of the air conditioning system is the amplitude of the compressor frequency of the air conditioning system which is reduced by a first set frequency on the basis of the current running frequency.
In some embodiments, the control unit adjusts at least one of an operating time threshold of the air conditioning system and an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to the stage of the air conditioning system in the different operating stages in the cooling mode, and further includes: under the condition that the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, after the frequency reducing amplitude of the frequency of a compressor of the air conditioning system is increased by a set frequency threshold, adjusting at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the refrigeration mode according to a continuous running period of the air conditioning system running according to a set interval period; wherein, the control unit adjusts at least one of the working time threshold of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger of the air conditioning system in the refrigeration mode according to the continuous operation cycle of the air conditioning system operating according to the set interval cycle, and the control unit comprises: under the condition that the continuous operation period is a first set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a third set temperature value for the temperature threshold value of the frequency limiting inner tube in the temperature threshold value of the indoor heat exchanger tube in the refrigeration mode; when the continuous operation period is a second set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air conditioning system by a first set time value; when the continuous operation period is a third set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air conditioning system by a second set time value; under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a detection time threshold value in working time threshold values of the air-conditioning system by a third set time value; and under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing the detection time threshold value in the working time threshold values of the air-conditioning system by a fourth set time value.
In accordance with another aspect of the present invention, there is provided an air conditioning system including: the control device of the air conditioning system described above.
In accordance with the above method, a further aspect of the present invention provides a storage medium, which includes a stored program, wherein when the program runs, a device in which the storage medium is located is controlled to execute the control method of the air conditioning system described above.
Therefore, according to the scheme of the invention, the time for the air conditioning system to enter the anti-freezing protection is controlled according to the operation condition of the air conditioning system, and the anti-freezing control parameter threshold value of the next interval period is adjusted based on the judgment on the anti-freezing operation state of the previous state, so that the anti-freezing protection threshold value is adjusted according to the operation condition of the air conditioning system, the frequent frequency reduction, the frequent anti-freezing protection and the like can be avoided in the operation process of the air conditioning system, and the comfort of a user is favorably improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a flowchart illustrating an embodiment of a control method of an air conditioning system according to the present invention;
FIG. 2 is a schematic flow chart illustrating an embodiment of the anti-freeze protection stage of the method for controlling the air conditioning system to operate in the cooling mode according to the present invention;
FIG. 3 is a schematic structural diagram of a control device of an air conditioning system according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart diagram illustrating one embodiment of a variable freeze protection threshold parameter control method;
FIG. 5 is a schematic flow chart diagram illustrating another embodiment of a variable freeze protection threshold parameter control method.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
102-an obtaining unit; 104-control unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the control of the anti-freezing protection of the one-driving-one fixed-frequency air conditioner, when the temperature of an inner pipe of the evaporator is collected for a period of time and is lower than a set threshold value, the air conditioning system is judged to enter the anti-freezing protection, after the air conditioning system enters the anti-freezing protection, the fan of the indoor unit continuously operates, the compressor stops, after the frost layer of the indoor evaporator gradually melts, the temperature of the inner pipe of the evaporator rises to be higher than the set threshold value, the air conditioning system is judged to exit the anti-freezing operation, and the compressor is normally started for refrigeration.
The temperature of the inner tube of the evaporator is collected for a period of time and is lower than a set threshold value, then the air conditioning system is judged to enter the anti-freezing protection, if the temperature of the inner tube of the evaporator is detected to be less than or equal to-1 ℃ for 5min continuously, the fixed frequency unit cannot reduce the frequency to avoid that the temperature of the inner tube is too low in operation, and only the anti-freezing protection can be carried out when the temperature is too low in operation.
In the anti-freezing protection control of the variable frequency air conditioning system unit, whether the anti-freezing protection condition is met or not is generally detected before the variable frequency air conditioning system unit is detected to enter the anti-freezing protection, the frequency is reduced before the temperature of the pipe is lower but not reaches the temperature threshold of the anti-freezing protection pipe, the air conditioning system is judged to quit the anti-freezing frequency reduction limit after the temperature of the inner pipe of the evaporator is increased to be higher than the set threshold, and the compressor can perform normal frequency increase and decrease adjustment according to the refrigeration requirement. Therefore, the frequency converter generally carries out frequency reduction treatment before anti-freezing protection, and the frequency converter enters the anti-freezing protection after the treatment is no matter how long the frequency converter enters the anti-freezing protection, which is equivalent to one layer of control more than the fixed frequency.
In some schemes, the design of the anti-freezing protection threshold is a fixed value, under the refrigeration running conditions of different outdoor environment temperatures, indoor environment temperatures, set wind gear, evaporator filth blockage degrees and the like, the condition that the temperature of an inner pipe of an evaporator changes along with the system is complex, a single anti-freezing frequency reduction limit and protection threshold design is not universal, and frequent frequency reduction limit and frequent anti-freezing protection are inevitably generated under certain conditions.
The temperature of the inner pipe of the evaporator is complex along with the change of the air conditioning system, for example, the temperature of the inner pipe is low due to low wind level, dirty blockage of the evaporator, high operation frequency, small operation steps of the throttle valve and the like, the temperature of the inner pipe is lower than 0 ℃, the evaporator is likely to frost, a frost layer blocks the heat exchanger, and normal refrigeration is affected.
The invention provides a control method of an air conditioning system, in particular to an intelligent air conditioning system capable of self-solving anti-freezing protection and a control method thereof, aiming at performing intelligent state prejudgment on unit operation anti-freezing and self-learning, self-processing and self-solving anti-freezing protection under a complex operation condition by a multi-threshold parameter design method.
According to an embodiment of the present invention, a method for controlling an air conditioning system is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The control method of the air conditioning system may include: step S110 to step S140.
In step S110, in a case where the air conditioning system operates in a cooling mode, a current operation time of a compressor of the air conditioning system is acquired, and an operation time threshold of the air conditioning system is acquired. The working time threshold of the air conditioning system comprises the following steps: a run time threshold for the compressor. Wherein the running time threshold of the compressor is a time threshold for determining whether the air conditioning system enters into anti-freezing protection. Running time threshold of the compressor, e.g. first set time T 1 。
At step S120, it is determined whether the current run time of the compressor has reached a run time threshold for the compressor.
At step S130, if the current operation time of the compressor has reached the operation time threshold of the compressor, acquiring an indoor heat exchanger tube temperature of the air conditioning system, and acquiring an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode.
In step S140, the air conditioning system is controlled to operate in different operation stages in the cooling mode according to the indoor heat exchanger tube temperature of the air conditioning system and the indoor heat exchanger tube temperature threshold in the cooling mode. The different working phases in the cooling mode comprise: at least one stage of an anti-freezing protection stage, a frequency limiting refrigeration stage, a frequency reducing refrigeration stage and a normal refrigeration stage.
The invention provides an intelligent air conditioning system capable of self-solving the anti-freezing protection and a control method thereof, which can carry out intelligent state prejudgment on the anti-freezing protection during the operation of a unit, and carry out self-learning, self-processing and self-solving the anti-freezing protection under the complex operation condition by a multi-threshold parameter design method. Therefore, through intelligent state prejudgment, the method for designing the multi-threshold parameters has strong applicability, and can avoid the defect of functional design caused by insufficient experience of designers and the like. The anti-freezing design defect of the variable-frequency one-drag-one air conditioning system is overcome, the reliability of the air conditioning system and the user experience are improved, and frequent frequency limiting and reducing and frequent anti-freezing protection are avoided.
In some embodiments, the indoor heat exchanger tube temperature threshold in the cooling mode includes: the temperature threshold of the freezing protection inner tube, the temperature threshold of the frequency limiting inner tube and the temperature threshold of the frequency limiting recovery inner tube.
In step S140, the air conditioning system is controlled to operate in different operation stages in the cooling mode according to the temperature of the indoor heat exchanger tube of the air conditioning system and the temperature threshold of the indoor heat exchanger tube in the cooling mode, including any one of the following control situations.
FIG. 4 is a flowchart illustrating an embodiment of a variable anti-freeze protection threshold parameter control method. As shown in fig. 4, the intelligent air conditioning system and the control method thereof according to the present invention can automatically solve the protection against freezing, including:
step 11, in the refrigeration mode, the compressor operates for a first set time T 1 After min, the judgment and control of step 12 are performed.
And step 12, carrying out the following judgment and control: step 121, step 122, step 123, step 124.
The first control scenario: the working time threshold of the air conditioning system further comprises: and detecting the tube temperature of the indoor heat exchanger for a time threshold. And within the detection time threshold of the indoor heat exchanger tube temperature, if the indoor heat exchanger tube temperature of the air-conditioning system is less than or equal to the freezing protection inner tube temperature threshold, controlling the air-conditioning system to work in an anti-freezing protection stage under the refrigeration mode.
As shown in fig. 4, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
step 121, when the pipe temperature T of the indoor heat exchanger Inner pipe Temperature threshold T of inner tube of freezing protection Freezing of inner tube And has continuously detected the second set time T 2 At min, the freezing prevention flag bit F is enabled Anti-freezing device Lighting is 1, and a preset cooling standby program is executed. Pipe temperature T of indoor heat exchanger Inner pipe And can be the temperature detected by an indoor heat exchanger such as an inner tube bulb of an evaporator. Temperature threshold T of inner tube in freezing protection Freezing of inner tube Such as-1 ℃. Anti-freezing zone bit F Anti-freezing device The lighting is 1 and the non-lighting is 0.
In some implementations, in a first control situation, a specific process of controlling the air conditioning system to operate in the anti-freeze protection phase in the cooling mode is described in the following exemplary description.
With reference to the flowchart of an embodiment of the stage of preventing the air conditioning system from operating in the cooling mode in the method of the present invention shown in fig. 2, a specific process of controlling the air conditioning system to operate in the cooling mode in the stage of preventing the air conditioning system from operating in the cooling mode is further described, which includes: step S210 and step S220.
And step S210, controlling a compressor of the air conditioning system to stop, controlling an outdoor fan of the air conditioning system to stop in a delayed mode, and increasing the wind level of an indoor fan of the air conditioning system. Wherein, heighten the windshield of the indoor fan of the air conditioning system includes: and if the current wind gear of the indoor fan of the air-conditioning system is the highest wind gear, keeping the wind gear of the indoor fan of the air-conditioning system at the current wind gear. And if the current wind shield of the indoor fan of the air-conditioning system is not the highest wind shield, the wind shield of the indoor fan of the air-conditioning system is increased to a set gear on the basis of the current wind shield.
Step S220, if the pipe temperature of the indoor heat exchanger of the air-conditioning system is greater than the threshold value of the temperature of the frequency-limiting recovery inner pipe and the shutdown time of the compressor of the air-conditioning system reaches the set shutdown time, controlling the air-conditioning system to recover to the normal refrigeration stage in the refrigeration mode.
As shown in fig. 4, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
in step 121, a preset cooling standby program is executed, which specifically includes: step 1211, step 1212, step 1213 and step 1214, and then return to step 12.
Step 1211, stop the compressor, set the extension time such as 30s, then stop the external fan, and then execute step 1213.
And 1212, controlling the inner fan according to the current wind gear of the inner fan.
Specifically, if the current wind level of the inner fan is the highest wind level, the inner fan keeps the highest wind level to continue running. If the current wind gear of the internal fan is other gears (i.e. other gears except the highest wind gear), the internal fan is + a first set gear, such as 1 gear, based on the current wind gear, so as to end the freeze prevention more quickly, and then step 1213 is executed.
Step 1213, when the frequency limit recovers the inner tube temperature threshold T Frequency limited recovery Pipe temperature T of indoor heat exchanger Inner tube And when the compressor is stopped for a set stop time, such as 1min, the anti-freeze protection is finished, and then step 1214 is executed. When the pipe temperature T of the indoor heat exchanger Inner pipe Temperature threshold T higher than frequency limit recovery inner tube Frequency limited recovery E.g. 5 c, the compressor no longer limits the frequency rise.
Step 1214, the normal cooling operation state is restored.
The second control scenario: and if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the threshold value of the temperature of the frequency limiting inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the threshold value of the temperature of the frequency limiting recovery inner tube, controlling the air-conditioning system to work in the frequency limiting refrigeration stage in the refrigeration mode. And in the frequency-limited refrigeration stage in the refrigeration mode, the frequency of a compressor of the air conditioning system maintains the current running frequency.
As shown in fig. 4, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
step 122, when the temperature threshold value T of the frequency-limited inner tube Inner tube frequency limiting Tube temperature T of indoor heat exchanger Inner pipe Less than or equal to frequency limit and recovering inner tube temperature threshold T Frequency limited recovery Hour, anti-freezing limit frequency-reducing flag bit F Frequency limiting The lighting is 1, and the compressor frequency is maintained, not rising but not falling.
The third control scenario: and if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the freezing protection inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency limiting inner tube, controlling the air-conditioning system to work in a frequency reduction refrigeration stage under the refrigeration mode. And in the stage of frequency reduction refrigeration in the refrigeration mode, the frequency of a compressor of the air conditioning system is reduced by a first set frequency according to a first set speed on the basis of the current operating frequency.
As shown in fig. 4, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
step 123, when the temperature threshold T of the inner pipe is protected by freezing Freezing of inner tube Pipe temperature T of indoor heat exchanger Inner pipe Temperature threshold T of inner tube less than or equal to frequency limit Inner tube frequency limiting Hour, anti-freezing limit frequency-reducing flag bit F Frequency reduction The ignition is 1, the compressor reduces the frequency of the first set frequency, such as 8Hz, and the frequency reduction rate is the first set rate, such as 1 Hz/s. Anti-freezing zone bit F Frequency reduction The lighting is 1 and the non-lighting is 0. When the pipe temperature T of the indoor heat exchanger Inner pipe Lower than the temperature threshold T of the frequency-limited inner tube Inner tube frequency limiting E.g., 2 c, the compressor is de-clocked.
The fourth control scenario: and if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the temperature threshold of the freezing protection inner tube, controlling the air conditioning system to work in a normal refrigeration stage under the refrigeration mode.
As shown in fig. 4, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
step 124, when the frequency limit is carried out, the temperature threshold T of the inner tube is recovered Frequency limited recovery Pipe temperature T of indoor heat exchanger Inner pipe The compressor frequency is controlled according to normal conditions, such as a target frequency determined according to the windshield, the outdoor ambient temperature, the target temperature, and the return air temperature difference.
The target frequency determined according to the difference between the wind gear, the outdoor environment temperature, the target temperature and the return air temperature specifically may include: different operation wind gears correspond to upper and lower intervals allowed by the lower frequency of the wind gear, for example, the wind gear 1 corresponds to 20-80Hz, the wind gear 2 corresponds to 20-90Hz, and the like; different outdoor environments also correspond to the upper and lower allowable frequency intervals in the environment interval, such as 20-35 ℃ outer ring, and correspond to the frequency of 20-100 Hz.
In some embodiments, further comprising: the process of performing cycle control in the cooling mode specifically includes: after controlling the air conditioning system to work in different working stages under the refrigeration mode according to the temperature of the indoor heat exchanger tube of the air conditioning system and the temperature threshold of the indoor heat exchanger tube under the refrigeration mode, continuing to control the air conditioning system to work in different working stages under the refrigeration mode according to the temperature of the indoor heat exchanger tube of the air conditioning system and the temperature threshold of the indoor heat exchanger tube under the refrigeration mode according to a set interval period.
As shown in fig. 4, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
step 12, setting a period T at intervals Period of time The following judgment and control are performed: step 121, step 122, step 123, step 124. Preferably, after step 11, for the judgment and control of step 12, the period tcycle judgment may be set and executed once every interval.
In some embodiments, further comprising: the process of performing the first dynamic adjustment on the corresponding threshold in the cooling mode specifically includes: after the current running time of the compressor reaches a running time threshold of the compressor, in the process of controlling the air conditioning system to work in different working stages in the cooling mode, at least one of a working time threshold of the air conditioning system and an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode is adjusted according to the working stages of the air conditioning system in the different working stages in the cooling mode.
FIG. 5 is a schematic flow chart diagram illustrating another embodiment of a variable freeze protection threshold parameter control method. As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention can automatically solve the protection against freezing, including:
step 21, in the refrigeration mode, the compressor operates for a first set time T 1 After min, the judgment and control of step 22 are performed synchronously.
Step 22, the judgments of step 221, step 222, step 223 and step 224 are performed.
Wherein, according to the stage that the air conditioning system has worked in different working stages under the refrigeration mode, at least one of the working time threshold of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger of the air conditioning system under the refrigeration mode is adjusted, including any one of the following adjustment situations:
the first regulation case: and if the stage of the air conditioning system working in different working stages in the refrigeration mode is a frequency limiting refrigeration stage, reducing the frequency limiting recovery inner tube temperature threshold value in the tube temperature threshold value of the indoor heat exchanger in the refrigeration mode to a first set temperature value.
As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
step 221, if the freezing prevention flag bit F is not frozen Anti-freezing device 0, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 0, freezing limit-preventing frequency-reducing flag bit F Frequency limiting When the value is 1, the next interval sets a period T Period of time When the judgment is carried out, the frequency limit recovers the inner tube temperature threshold value T Frequency limited recovery Frequency-limited recovery inner tube temperature threshold T Frequency limited recovery -1, the value of which must be such as to guarantee a freeze-protection internal tube temperature threshold T Freezing of inner tube < temperature threshold T of inner tube in frequency limit Inner tube frequency limiting < frequency-limited recovery inner tube temperature threshold T Frequency limited recovery And values are integers.
Here, if the freezing prevention flag bit F is set Anti-freezing device 0, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 0, freezing limit-preventing frequency-reducing flag bit F Frequency limiting 1, explain that the unit only frequently gets into, withdraw from the limit frequency condition, explain that the pipe temperature is only a little lower, will limit frequency and resume the inner tube temperature threshold value and reduce the back, the unit will not get into frequent limit frequency operation again, can normally refrigerate, and the effect is better, and the operating frequency can be some height.
Wherein, the frequency limit recovers the temperature threshold T of the inner tube Frequency limited recovery Frequency-limited recovery inner tube temperature threshold T Frequency limited recovery -1, which may be a 5 ℃ threshold decrease, each by 1 ℃, e.g. 5 ℃, 4 ℃ and 3 ℃ in sequence.
The second regulation case: and if the working stages of the air conditioning system in different working stages in the refrigeration mode are a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the temperature threshold of the frequency limiting inner tube in the temperature threshold of the tube of the indoor heat exchanger in the refrigeration mode by a second set temperature value. The second set temperature value may be the same as or different from the first set temperature value.
As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
step 222, if the freezing prevention flag bit F is not frozen Anti-freezing device 0, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting When the value is 1, the next interval sets a period T Period of time Inner tube temperature threshold T of time-limited frequency of execution judgment Inner tube frequency limiting Frequency-limited inner tube temperature threshold T Inner tube frequency limiting -1, the value of which must be such as to guarantee a freeze-protection internal tube temperature threshold T Inner tube freezing < temperature threshold T of inner tube in frequency limit Inner tube frequency limiting < frequency-limited recovery inner tube temperature threshold T Frequency limited recovery And values are integers.
Here, if the freezing prevention flag bit F is set Anti-freezing device 0, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting When the unit enters a frequent frequency limiting and reducing condition, the frequency limiting inner tube is connected with the frequency limiting inner tubeAfter the temperature threshold value is reduced, the unit does not enter frequent frequency reduction operation any more, and is maintained at a high frequency stable refrigeration operation, so that the refrigeration effect is better.
Wherein, the temperature threshold T of the frequency-limited inner tube Inner tube frequency limiting Frequency-limited inner tube temperature threshold T Inner tube frequency limiting -1 may be a reduction of the threshold of 2 ℃ by 1 ℃ each time, at least not below the freeze protection threshold of-1 ℃, e.g. 2 ℃, 1 ℃ and 0 ℃ in that order.
The third regulation situation: and if the working stages of the air conditioning system in the different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reduction refrigeration stage, increasing the frequency reduction amplitude of the frequency of the compressor of the air conditioning system by a set frequency threshold value in the frequency reduction refrigeration stage in the refrigeration mode. The frequency reduction amplitude of the compressor frequency of the air conditioning system is the amplitude of the compressor frequency of the air conditioning system which is reduced by a first set frequency on the basis of the current running frequency.
As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include:
step 223, if the freezing prevention flag bit F is not frozen Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting When the value is 1, the next interval sets a period T Period of time When the judgment is carried out, the compressor frequency reduction amplitude is increased to be +2Hz, and the frequency reduction rate is kept unchanged.
Step 224, in other cases, the next interval sets the period T Period of time And judging that the anti-freezing parameters do not change at the time of execution, and avoiding the occurrence of frequent frequency limiting and frequency reducing and protection by using the control margin of the control logic.
Wherein, the temperature threshold value T of the freezing protection inner tube Freezing of inner tube Such as-1 ℃; frequency-limiting recovery inner tube temperature threshold value T Frequency limited recovery When the temperature of the inner pipe is higher than the value, the compressor does not limit the frequency to rise any more, such as 5 ℃; frequency-limited inner tube temperature threshold value T Inner tube frequency limiting When the temperature of the inner tube is lower than the value, the compressor reduces the frequency, such as 2 ℃, between the threshold valuesThere is a control margin (-1, 2, 5). By using the control margin, the control threshold value is dynamically changed, the frequent frequency limitation and frequent frequency reduction are avoided, and the refrigeration effect T is improved Frequency limited recovery ＝T Frequency limited recovery -1、T Inner tube frequency limiting ＝T Inner tube frequency limiting -1。
In some embodiments, adjusting at least one of an operating time threshold of the air conditioning system and an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to the stage of the air conditioning system operating in the different operating stages in the cooling mode further comprises: the process of performing the second dynamic adjustment on the corresponding threshold value in the cooling mode specifically includes: under the condition that the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, after the frequency reducing amplitude of the compressor frequency of the air conditioning system is increased by a set frequency threshold, at least one of the working time threshold of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger of the air conditioning system in the refrigeration mode is adjusted according to the continuous running period of the air conditioning system running according to the set interval period.
Wherein, according to the continuous operation period of the air conditioning system operating according to the set interval period, at least one of the working time threshold of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger of the air conditioning system in the refrigeration mode is adjusted, including any one of the following further adjustment situations:
as shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include: after step 223, further, adjustments may be made in several ways.
The first further adjustment scenario: and under the condition that the continuous operation period is a first set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reduction refrigeration stage, increasing a third set temperature value for the temperature threshold value of the frequency limiting inner tube in the temperature threshold value of the indoor heat exchanger tube in the refrigeration mode. The third set temperature value may be the same as or different from the first set temperature value and the second set temperature value.
As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include, after step 223:
firstly, if the operation is continued for 2 periods, an anti-freezing mark position F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time Inner tube temperature threshold T of time-limited frequency of execution judgment Inner tube frequency limiting Frequency-limited inner tube temperature threshold T Inner tube frequency limiting +1。
Thus, if the freezing prevention flag bit F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If the problem that the frequency limiting temperature threshold value of the inner pipe cannot be increased is solved, the frequency reduction can be increased, and the frequency reduction is started to reach the pipe temperature range of freezing protection, so that the possibility of avoiding the anti-freezing protection is improved, and the control performance of the unit is favorably improved.
Wherein, the temperature threshold T of the frequency-limited inner tube Inner tube frequency limiting Frequency-limited inner tube temperature threshold T Inner tube frequency limiting +1 may be a threshold of 2 ℃ rise, 1 ℃ rise each time, and the maximum of 5 ℃ of the frequency-limited recovery threshold cannot be exceeded, such as 2 ℃, 3 ℃ and 4 ℃ in sequence.
A second further adjustment scenario: and under the condition that the continuous operation period is a second set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air-conditioning system by a first set time value.
As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include, after step 223:
secondly, if the operation is carried out for 4 continuous periods, an anti-freezing zone bit F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time First set time T for judging execution 1 First set time T 1 A first time threshold, such as 1 min.
Therefore, the unit is protected by frequent entering of anti-freezing, and is started again after freezing, the compressor is operated for a period of time T1, the period of time is shortened, the temperature of the inner pipe can be prevented from being reduced, and the compressor is favorable for preventing the compressor from entering of anti-freezing frequently.
A third further adjustment scenario: and under the condition that the continuous operation period is a third set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air-conditioning system by a second set time value. The second set time value is different from the first set time value.
As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include, after step 223:
thirdly, if the operation is carried out for 6 continuous periods, the anti-freezing mark position F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time First set time T for judging execution 1 First set time T 1 A second time threshold, such as 2 min.
Thus, the unit is protected from freezing after entering frequently, and is started again after freezing, and the compressor is operated by T 1 And the time is reduced for a while, so that the temperature of the inner pipe can be prevented from being lowered, and the anti-freezing device is favorable for preventing frequent entering and anti-freezing.
A fourth further adjustment scenario: and under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a detection time threshold value in the working time threshold values of the air-conditioning system by a third set time value. The third set time value may be the same as the first set time value.
As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include, after step 223:
fourthly, if the operation is carried out for 8 continuous periods, the anti-freezing mark bit F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time Second set time T for judging execution 2 Second set time T 2 + a first time threshold, such as 1 min.
Thus, the unit is protected from freezing after frequent entering, T Period of time ＝T 2 The time can prolong the time of improving the refrigeration effect by measures such as control margin and the like, and is beneficial to improving the refrigeration effect.
Fifth further adjustment scenario: and under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing the detection time threshold value in the working time threshold values of the air-conditioning system by a fourth set time value. The fourth set time value may be the same as the second set time value.
As shown in fig. 5, the intelligent air conditioning system and the control method thereof according to the present invention may further include, after step 223:
fifthly, if the operation is continuously carried out for 10 cycles, if the anti-freezing mark position F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time Second set time T for judging execution 2 Is No. 2Two set time T 2 + a second time threshold such as 2 min.
Thus, the unit is protected against freezing after frequent entering, T Period of time ＝T 2 The time can prolong the time of improving the refrigeration effect by measures such as control margin and the like, and is beneficial to improving the refrigeration effect.
According to the scheme, the anti-freezing control parameter threshold value of the next interval period is adjusted through judging the anti-freezing operation state of the previous state, anti-freezing protection is self-learned, self-processed and self-solved, the anti-freezing design defect of the variable-frequency one-drag-one air conditioning system is overcome, the reliability and the user experience of the air conditioning system are improved, and frequent frequency limiting and reducing and frequent anti-freezing protection can be avoided to a certain extent.
By adopting the technical scheme of the embodiment, the time for the air conditioning system to enter the anti-freezing protection is controlled according to the operation condition of the air conditioning system, and the anti-freezing control parameter threshold value of the next interval period is adjusted based on the judgment on the anti-freezing operation state of the previous state, so that the anti-freezing protection threshold value is adjusted according to the operation condition of the air conditioning system, frequent frequency limiting and reducing, frequent anti-freezing protection and the like can be avoided in the operation process of the air conditioning system, and the comfort of users can be improved.
According to the embodiment of the invention, the control device of the air conditioning system corresponding to the control method of the air conditioning system is also provided. Referring to fig. 3, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The control device of the air conditioning system may include: an acquisition unit 102 and a control unit 104.
The obtaining unit 102 is configured to obtain a current operation time of a compressor of the air conditioning system and obtain an operation time threshold of the air conditioning system when the air conditioning system operates in a cooling mode. The working time threshold of the air conditioning system comprises the following steps: a run time threshold for the compressor. Wherein the running time threshold of the compressor is a time threshold for determining whether the air conditioning system enters into anti-freezing protection. Running time threshold of the compressor, e.g. first set time T 1 . Detailed function of the acquisition unit 102And the process is referred to step S110.
A control unit 104 configured to determine whether a current operation time of the compressor has reached an operation time threshold of the compressor. The specific function and processing of the control unit 104 are referred to in step S120.
The obtaining unit 102 is further configured to obtain an indoor heat exchanger tube temperature of the air conditioning system and obtain an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode if the current operation time of the compressor reaches the operation time threshold of the compressor. The specific function and processing of the acquisition unit 102 are also referred to in step S130.
The control unit 104 is further configured to control the air conditioning system to operate in different operation stages in the cooling mode according to the indoor heat exchanger tube temperature of the air conditioning system and the indoor heat exchanger tube temperature threshold in the cooling mode. The different working phases in the cooling mode comprise: at least one stage of an anti-freezing protection stage, a frequency limiting refrigeration stage, a frequency reducing refrigeration stage and a normal refrigeration stage. The specific function and processing of the control unit 104 are also referred to in step S140.
The invention provides an intelligent air conditioning system capable of self-solving the anti-freezing protection and a control device thereof, which are used for intelligently pre-judging the anti-freezing state of the unit operation, and self-learning, self-processing and self-solving the anti-freezing protection under the complex operation condition through a device with multi-threshold parameter design. Therefore, through intelligent state prejudgment, the device designed by the multi-threshold parameters has strong applicability, and can avoid the defect of functional design caused by insufficient experience of designers and the like. The anti-freezing design defect of the variable-frequency one-drag-one air conditioning system is overcome, the reliability of the air conditioning system and the user experience are improved, and frequent frequency limiting and reducing and frequent anti-freezing protection are avoided.
In some embodiments, the indoor heat exchanger tube temperature threshold in the cooling mode includes: the temperature threshold of the freezing protection inner tube, the temperature threshold of the frequency limiting inner tube and the temperature threshold of the frequency limiting recovery inner tube.
The control unit 104 controls the air conditioning system to work in different working stages in the cooling mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger in the cooling mode, where the control conditions include any one of the following control conditions:
FIG. 4 is a schematic flow chart diagram of an embodiment of a variable freeze protection threshold parameter control apparatus. As shown in fig. 4, an intelligent air conditioning system and a control device thereof capable of self-solving the protection against freezing according to the present invention includes:
step 11, in the refrigeration mode, the compressor operates for a first set time T 1 After min, the judgment and control of step 12 are performed.
And step 12, carrying out the following judgment and control: step 121, step 122, step 123, step 124.
The first control scenario: the control unit 104 is specifically configured to be an operating time threshold of the air conditioning system, and further includes: and detecting the tube temperature of the indoor heat exchanger for a time threshold. And within the detection time threshold of the indoor heat exchanger tube temperature, if the indoor heat exchanger tube temperature of the air-conditioning system is less than or equal to the freezing protection inner tube temperature threshold, controlling the air-conditioning system to work in an anti-freezing protection stage under the refrigeration mode.
As shown in fig. 4, the intelligent air conditioning system and the control device thereof according to the present invention may further include:
step 121, when the pipe temperature T of the indoor heat exchanger Inner pipe Temperature threshold T of inner tube of freezing protection Freezing of inner tube And has continuously detected the second set time T 2 At min, the anti-freezing flag bit F is enabled Anti-freezing device Lighting is 1, and a preset cooling standby program is executed. Pipe temperature T of indoor heat exchanger Inner pipe And can be the temperature detected by an indoor heat exchanger such as an inner tube bulb of an evaporator. Temperature threshold T of inner tube in freezing protection Freezing of inner tube Such as-1 ℃. Anti-freezing zone bit F Anti-freezing device The lighting is 1 and the non-lighting is 0.
In some embodiments, the control unit 104, controlling the air conditioning system to operate in the freeze protection phase in the cooling mode, includes:
the control unit 104 is further specifically configured to control a compressor of the air conditioning system to stop, delay control an outdoor fan of the air conditioning system to stop, and increase a wind level of an indoor fan of the air conditioning system. Wherein, heighten the windshield of the indoor fan of the air conditioning system includes: and if the current wind gear of the indoor fan of the air-conditioning system is the highest wind gear, keeping the wind gear of the indoor fan of the air-conditioning system at the current wind gear. And if the current wind shield of the indoor fan of the air-conditioning system is not the highest wind shield, the wind shield of the indoor fan of the air-conditioning system is increased to a set gear on the basis of the current wind shield. The specific functions and processes of the control unit 104 are also referred to in step S210.
The control unit 104 is specifically further configured to control the air conditioning system to recover to a normal refrigeration stage in the refrigeration mode if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the threshold value of the temperature of the frequency-limited recovery inner tube and the shutdown time of the compressor of the air conditioning system reaches a set shutdown time. The specific functions and processes of the control unit 104 are also referred to in step S220.
As shown in fig. 4, the intelligent air conditioning system and the control device thereof according to the present invention may further include:
in step 121, a preset cooling standby program is executed, which specifically includes: step 1211, step 1212, step 1213 and step 1214, and then return to step 12.
Step 1211, stop the compressor, set the extension time such as 30s, then stop the external fan, and then execute step 1213.
And 1212, controlling the inner fan according to the current wind gear of the inner fan.
Specifically, if the current wind level of the inner fan is the highest wind level, the inner fan keeps the highest wind level to continue running. If the current wind gear of the internal fan is other gears (i.e. other gears except the highest wind gear), the internal fan is + a first set gear, such as 1 gear, based on the current wind gear, so as to end the freeze prevention more quickly, and then step 1213 is executed.
Step 1213, when the frequency limit recovers the inner tube temperature threshold T Frequency limited recovery Tube temperature T of indoor heat exchanger Inner pipe And when the compressor is stopped for a set stop time, such as 1min, the anti-freeze protection is finished, and then step 1214 is executed. When the pipe temperature T of the indoor heat exchanger Inner pipe Temperature threshold T higher than frequency limit recovery inner tube Frequency limited recovery E.g. 5 c, the compressor no longer limits the frequency rise.
Step 1214, the normal cooling operation state is restored.
The second control scenario: the control unit 104 is specifically configured to control the air conditioning system to operate in the frequency-limited cooling stage in the cooling mode if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the frequency-limited inner tube temperature threshold and the temperature of the indoor heat exchanger tube of the air conditioning system is less than or equal to the frequency-limited recovery inner tube temperature threshold. And in the frequency-limited refrigeration stage in the refrigeration mode, the frequency of a compressor of the air conditioning system maintains the current running frequency.
As shown in fig. 4, the intelligent air conditioning system and the control device thereof according to the present invention may further include:
step 122, when the temperature threshold T of the inner tube is limited Inner tube frequency limiting Pipe temperature T of indoor heat exchanger Inner pipe Less than or equal to frequency limit and recovering inner tube temperature threshold T Frequency limited recovery Hour, anti-freezing limit frequency-reducing flag bit F Frequency limiting The lighting is 1, and the compressor frequency is maintained, not rising but not falling.
The third control scenario: the control unit 104 is specifically further configured to control the air conditioning system to operate in the frequency-reduction cooling stage in the cooling mode if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the temperature threshold of the freeze protection inner tube, and the temperature of the indoor heat exchanger tube of the air conditioning system is less than or equal to the temperature threshold of the frequency-limiting inner tube. And in the stage of frequency reduction refrigeration in the refrigeration mode, the frequency of a compressor of the air conditioning system is reduced by a first set frequency according to a first set speed on the basis of the current operating frequency.
As shown in fig. 4, the intelligent air conditioning system and the control device thereof according to the present invention may further include:
step 123, when the temperature threshold T of the inner pipe is protected by freezing Freezing of inner tube Pipe temperature T of indoor heat exchanger Inner pipe Temperature threshold T of inner tube less than or equal to frequency limit Inner tube frequency limiting Hour, anti-freezing limit frequency-reducing flag bit F Frequency reduction The ignition is 1, the compressor reduces the frequency of the first set frequency, such as 8Hz, and the frequency reduction rate is the first set rate, such as 1 Hz/s. Anti-freezing zone bit F Frequency reduction The lighting is 1 and the non-lighting is 0. When the pipe temperature T of the indoor heat exchanger Inner pipe Lower than the temperature threshold T of the frequency-limited inner tube Inner tube frequency limiting E.g., 2 c, the compressor is de-clocked.
The fourth control scenario: the control unit 104 is specifically further configured to control the air conditioning system to operate in a normal refrigeration stage in the refrigeration mode if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the temperature threshold of the freeze protection inner tube.
As shown in fig. 4, the intelligent air conditioning system and the control device thereof according to the present invention may further include:
step 124, when the frequency limit is carried out, the temperature threshold T of the inner tube is recovered Frequency limited recovery Pipe temperature T of indoor heat exchanger Inner pipe The compressor frequency is controlled according to normal conditions, such as a target frequency determined according to the windshield, the outdoor ambient temperature, the target temperature, and the return air temperature difference.
In some embodiments, further comprising: the process of performing cycle control in the cooling mode specifically includes: the control unit 104 is further configured to, after controlling the air conditioning system to operate in different working stages in the cooling mode according to the temperature of the indoor heat exchanger tube of the air conditioning system and the temperature threshold of the indoor heat exchanger tube in the cooling mode, continue to control the air conditioning system to operate in different working stages in the cooling mode according to the temperature of the indoor heat exchanger tube of the air conditioning system and the temperature threshold of the indoor heat exchanger tube in the cooling mode at set intervals.
As shown in fig. 4, the intelligent air conditioning system and the control device thereof according to the present invention may further include:
step 12, setting a period T at intervals Period of time The following judgment and control are performed: step 121, step 122, step 123, step 124. Preferably, after step 11, for the judgment and control of step 12, the period tcycle judgment may be set and executed once every interval.
In some embodiments, further comprising: the process of performing the first dynamic adjustment on the corresponding threshold in the cooling mode specifically includes: the control unit 104 is further configured to adjust at least one of the operating time threshold of the air conditioning system and the indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to the stage of the air conditioning system operated in the different operating stages in the cooling mode in the process of controlling the air conditioning system to operate in the different operating stages in the cooling mode after the current operating time of the compressor has reached the operating time threshold of the compressor.
FIG. 5 is a schematic flow chart diagram of another embodiment of a variable freeze protection threshold parameter control apparatus. As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention can automatically solve the protection against freezing, and includes:
step 21, in the refrigeration mode, the compressor operates for a first set time T 1 After min, the judgment and control of step 22 are performed synchronously.
Step 22, the judgments of step 221, step 222, step 223 and step 224 are performed.
Wherein, the control unit 104 adjusts at least one of the working time threshold of the air conditioning system and the indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to the stage in which the air conditioning system has worked in the different working stages in the cooling mode, and includes any one of the following adjustment situations:
the first regulation case: the control unit 104 is specifically configured to, if the stage in which the air conditioning system has operated in the different working stages in the cooling mode is a frequency-limiting cooling stage, decrease the frequency-limiting recovery inner tube temperature threshold in the indoor heat exchanger tube temperature threshold in the cooling mode by a first set temperature value.
As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention can automatically solve the protection against freezing, further comprising:
step 221, if the freezing prevention flag bit F is not frozen Anti-freezing device 0, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 0, freezing limit-preventing frequency-reducing flag bit F Frequency limiting When the value is 1, the next interval sets a period T Period of time When the judgment is carried out, the frequency limit recovers the inner tube temperature threshold value T Frequency limited recovery Frequency-limited recovery inner tube temperature threshold T Frequency limited recovery -1, the value of which must be such as to guarantee a freeze-protection internal tube temperature threshold T Freezing of inner tube < temperature threshold T of inner tube in frequency limit Inner tube frequency limiting < frequency-limited recovery inner tube temperature threshold T Frequency limited recovery And values are integers.
Wherein, the frequency limit recovers the temperature threshold T of the inner tube Frequency limited recovery Frequency-limited recovery inner tube temperature threshold T Frequency limited recovery -1, which may be a 5 ℃ threshold decrease, each by 1 ℃, e.g. 5 ℃, 4 ℃ and 3 ℃ in sequence.
The second regulation case: the control unit 104 is specifically configured to decrease a temperature threshold of the frequency-limited inner tube in a temperature threshold of the indoor heat exchanger tube in the cooling mode by a second set temperature value if the phases in which the air conditioning system operates in different working phases in the cooling mode are a frequency-limited cooling phase and a frequency-reduced cooling phase. The second set temperature value may be the same as or different from the first set temperature value.
As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention can automatically solve the protection against freezing, further comprising:
step 222, if the freezing prevention flag bit F is not frozen Anti-freezing device 0, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting When the value is 1, the next interval sets a period T Period of time Inner tube temperature threshold T of time-limited frequency of execution judgment Inner tube frequency limiting Frequency-limited inner tube temperature threshold T Inner tube frequency limiting -1, the value of which must be such as to guarantee a freeze-protection internal tube temperature threshold T Freezing of inner tube < temperature threshold T of inner tube in frequency limit Inner tube frequency limiting < frequency-limited recovery inner tube temperature threshold T Frequency limited recovery And values are integers.
Wherein, the temperature threshold T of the frequency-limited inner tube Inner tube frequency limiting Frequency-limited inner tube temperature threshold T Inner tube frequency limiting -1 may be a reduction of the threshold of 2 ℃ by 1 ℃ each time, at least not below the freeze protection threshold of-1 ℃, e.g. 2 ℃, 1 ℃ and 0 ℃ in that order.
The third regulation case: the control unit 104 is specifically configured to, if the working stages of the air conditioning system in the different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage, and a frequency reducing refrigeration stage, increase a frequency reducing amplitude of the frequency of the compressor of the air conditioning system by a set frequency threshold in the frequency reducing refrigeration stage in the refrigeration mode. The frequency reduction amplitude of the compressor frequency of the air conditioning system is the amplitude of the compressor frequency of the air conditioning system which is reduced by a first set frequency on the basis of the current running frequency.
As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention can automatically solve the protection against freezing, further comprising:
step 223, if the freezing prevention flag bit F is not frozen Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting When the value is 1, the next interval sets a period T Period of time When the judgment is carried out, the compressor frequency reduction amplitude is increased to be +2Hz, and the frequency reduction rate is kept unchanged.
Step 224, in other cases, the next interval sets the period T Period of time And judging that the anti-freezing parameters do not change at the time of execution, and avoiding the occurrence of frequent frequency limiting and frequency reducing and protection by using the control margin of the control logic.
In some embodiments, the control unit 104 adjusts at least one of an operating time threshold of the air conditioning system and an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to the stage of the air conditioning system in the different operating stages in the cooling mode, and further includes: the process of performing the second dynamic adjustment on the corresponding threshold value in the cooling mode specifically includes: the control unit 104 is specifically further configured to, when the stages in which the air conditioning system operates in different operating stages in the cooling mode are an anti-freezing protection stage, a frequency limiting cooling stage, and a frequency reducing cooling stage, after increasing a frequency reduction amplitude of a compressor frequency of the air conditioning system by a set frequency threshold, adjust at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the cooling mode according to a continuous operating period in which the air conditioning system operates at set interval periods.
Wherein, the control unit 104, according to the continuous operation cycle of the air conditioning system operating according to the set interval cycle, adjusts at least one of the working time threshold of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger of the air conditioning system in the cooling mode, and includes any one of the following further adjustment situations:
as shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention can automatically solve the protection against freezing, further comprising: after step 223, further, adjustments may be made in several ways.
The first further adjustment scenario: the control unit 104 is specifically configured to increase a temperature threshold of the frequency-limited inner tube in a temperature threshold of the indoor heat exchanger tube in the cooling mode by a third set temperature value when the continuous operation period is a first set number and the working stages of the air conditioning system in the different working stages in the cooling mode are an anti-freezing protection stage, a frequency-limited cooling stage and a frequency-down cooling stage. The third set temperature value may be the same as or different from the first set temperature value and the second set temperature value.
As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention may further include, after step 223:
firstly, if the operation is continued for 2 periods, an anti-freezing mark position F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time Inner tube temperature threshold T of time-limited frequency of execution judgment Inner tube frequency limiting Frequency-limited inner tube temperature threshold T Inner tube frequency limiting +1。
Wherein, the temperature threshold T of the frequency-limited inner tube Inner tube frequency limiting Frequency-limited inner tube temperature threshold T Inner tube frequency limiting +1 may be a threshold of 2 ℃ rise, 1 ℃ rise each time, and the maximum of 5 ℃ of the frequency-limited recovery threshold cannot be exceeded, such as 2 ℃, 3 ℃ and 4 ℃ in sequence.
A second further adjustment scenario: the control unit 104 is specifically further configured to decrease an operation time threshold of the operation time thresholds of the air conditioning system by a first set time value when the continuous operation period is a second set number and the working stages of the air conditioning system in the different working stages in the cooling mode are an anti-freezing protection stage, a frequency limiting cooling stage and a frequency reducing cooling stage.
As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention may further include, after step 223:
secondly, if the operation is carried out for 4 continuous periods, an anti-freezing zone bit F still exists Anti-freezing device 1, anti-freezing limit frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time First set time T for judging execution 1 First set time T 1 A first time threshold, such as 1 min.
A third further adjustment scenario: the control unit 104 is specifically further configured to decrease an operation time threshold of the operation time thresholds of the air conditioning system by a second set time value when the continuous operation period is a third set number and the working stages of the air conditioning system in the different working stages in the cooling mode are an anti-freezing protection stage, a frequency limiting cooling stage and a frequency reducing cooling stage. The second set time value is different from the first set time value.
As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention may further include, after step 223:
thirdly, if the operation is carried out for 6 continuous periods, the anti-freezing mark position F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time First set time T for judging execution 1 First set time T 1 A second time threshold, such as 2 min.
A fourth further adjustment scenario: the control unit 104 is specifically further configured to increase a detection time threshold of the working time thresholds of the air conditioning system by a third set time value when the continuous operation period is a fourth set number and the working stages of the air conditioning system in the different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency-limiting refrigeration stage and a frequency-reducing refrigeration stage. The third set time value may be the same as the first set time value.
As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention may further include, after step 223:
fourthly, if the operation is carried out for 8 continuous periods, the anti-freezing mark bit F still exists Anti-freezing device 1, anti-freezing limit frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time Second set time T for judging execution 2 Second set time T 2 + a first time threshold such as 1 min.
Fifth further adjustment scenario: the control unit 104 is specifically further configured to increase a detection time threshold of the working time thresholds of the air conditioning system by a fourth set time value when the continuous operation period is a fourth set number and the working stages of the air conditioning system in the different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage. The fourth set time value may be the same as the second set time value.
As shown in fig. 5, the intelligent air conditioning system and the control device thereof according to the present invention may further include, after step 223:
fifthly, if the operation is continued for 10 cycles, if the anti-freezing mark position F still exists Anti-freezing device 1, freezing limit-preventing frequency-reducing flag bit F Frequency reduction 1, freezing limit-preventing frequency-reducing flag bit F Frequency limiting If 1 is true, the next interval sets the period T Period of time Second set time T for judging execution 2 Second set time T 2 + a second time threshold such as 2 min.
According to the scheme, the anti-freezing control parameter threshold value of the next interval period is adjusted through judging the anti-freezing operation state of the previous state, anti-freezing protection is self-learned, self-processed and self-solved, the anti-freezing design defect of the variable-frequency one-drag-one air conditioning system is overcome, the reliability and the user experience of the air conditioning system are improved, and frequent frequency limiting and reducing and frequent anti-freezing protection can be avoided to a certain extent.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method, reference may be made to the related descriptions in the embodiments without being detailed in the description of this embodiment, which is not described herein again.
By adopting the technical scheme of the invention, the anti-freezing protection can be self-learned, self-processed and self-solved by controlling the time for the air conditioning system to enter the anti-freezing protection according to the running condition of the air conditioning system and adjusting the anti-freezing control parameter threshold value of the next interval period based on the judgment of the anti-freezing running state of the previous state.
According to an embodiment of the present invention, there is also provided an air conditioning system corresponding to a control device of the air conditioning system. The air conditioning system may include: the control device of the air conditioning system described above.
Since the processing and functions of the air conditioning system of this embodiment are basically corresponding to the embodiments, principles and examples of the foregoing devices, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.
By adopting the technical scheme of the invention, the time for the air conditioning system to enter the anti-freezing protection is controlled according to the running condition of the air conditioning system, and the anti-freezing control parameter threshold value of the next interval period is adjusted based on the judgment of the anti-freezing running state of the previous state, so that frequent frequency limiting and frequency reduction and frequent anti-freezing protection can be avoided to a certain extent.
According to an embodiment of the present invention, there is also provided a storage medium corresponding to a control method of an air conditioning system, the storage medium including a stored program, wherein an apparatus in which the storage medium is located is controlled to execute the control method of the air conditioning system described above when the program is executed.
Since the processing and functions implemented by the storage medium of this embodiment substantially correspond to the embodiments, principles, and examples of the foregoing method, reference may be made to the related descriptions in the foregoing embodiments without being detailed in the description of this embodiment.
By adopting the technical scheme of the invention, the time for the air conditioning system to enter the anti-freezing protection is controlled according to the running condition of the air conditioning system, and the anti-freezing control parameter threshold value of the next interval period is adjusted based on the judgment of the anti-freezing running state of the previous state, so that the anti-freezing design defect of the variable-frequency one-drag-one air conditioning system is overcome, and the reliability and the user experience of the air conditioning system are improved.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (14)

1. A control method of an air conditioning system, comprising:
under the condition that the air-conditioning system works in a refrigeration mode, acquiring the current running time of a compressor of the air-conditioning system, and acquiring a working time threshold of the air-conditioning system; the working time threshold of the air conditioning system comprises the following steps: a run time threshold for the compressor; wherein the running time threshold of the compressor is a time threshold for determining whether the air conditioning system enters anti-freezing protection;
determining whether a current run time of the compressor has reached a run time threshold of the compressor;
if the current running time of the compressor reaches the running time threshold of the compressor, acquiring the pipe temperature of an indoor heat exchanger of the air-conditioning system, and acquiring the pipe temperature threshold of the indoor heat exchanger of the air-conditioning system in the refrigeration mode;
controlling the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold value of the indoor heat exchanger under the refrigeration mode; the different working phases in the cooling mode comprise: at least one stage of an anti-freezing protection stage, a frequency limiting refrigeration stage, a frequency reducing refrigeration stage and a normal refrigeration stage.
2. The method for controlling an air conditioning system according to claim 1, wherein the indoor heat exchanger tube temperature threshold in the cooling mode includes: freezing protection inner tube temperature threshold, frequency limiting inner tube temperature threshold and frequency limiting recovery inner tube temperature threshold;
controlling the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger under the refrigeration mode, wherein the working stages comprise:
the working time threshold of the air conditioning system further comprises: a detection time threshold of the indoor heat exchanger tube temperature; within the detection time threshold of the indoor heat exchanger tube temperature, if the indoor heat exchanger tube temperature of the air conditioning system is less than or equal to the freezing protection inner tube temperature threshold, controlling the air conditioning system to work in an anti-freezing protection stage under the refrigeration mode;
if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the frequency-limiting inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency-limiting recovery inner tube, controlling the air-conditioning system to work in a frequency-limiting refrigeration stage under the refrigeration mode; in the limited frequency refrigeration stage in the refrigeration mode, the frequency of a compressor of the air conditioning system maintains the current running frequency;
if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the freezing protection inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency limiting inner tube, controlling the air-conditioning system to work in a frequency reduction refrigeration stage under the refrigeration mode; in the stage of frequency reduction refrigeration in the refrigeration mode, the frequency of a compressor of the air conditioning system is reduced by a first set frequency according to a first set speed on the basis of the current operating frequency;
and if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the temperature threshold of the freezing protection inner tube, controlling the air conditioning system to work in a normal refrigeration stage under the refrigeration mode.
3. The method for controlling the air conditioning system according to claim 2, wherein the step of controlling the air conditioning system to operate in the freeze protection stage in the cooling mode comprises:
controlling a compressor of the air-conditioning system to stop, delaying to control an outdoor fan of the air-conditioning system to stop, and increasing a wind level of an indoor fan of the air-conditioning system; wherein, heighten the windshield of the indoor fan of the air conditioning system includes: if the current wind gear of the indoor fan of the air-conditioning system is the highest wind gear, keeping the wind gear of the indoor fan of the air-conditioning system at the current wind gear; if the current wind gear of the indoor fan of the air-conditioning system is not the highest wind gear, the wind gear of the indoor fan of the air-conditioning system is increased to a set gear on the basis of the current wind gear;
and if the pipe temperature of the indoor heat exchanger of the air-conditioning system is greater than the temperature threshold of the frequency limiting recovery inner pipe and the compressor downtime of the air-conditioning system reaches the set downtime, controlling the air-conditioning system to recover to the normal refrigeration stage under the refrigeration mode.
4. The control method of an air conditioning system according to any one of claims 1 to 3, characterized by further comprising:
after controlling the air conditioning system to work in different working stages under the refrigeration mode, according to a set interval period, continuing to control the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger under the refrigeration mode.
5. The control method of an air conditioning system according to any one of claims 1 to 4, characterized by further comprising:
after the current running time of the compressor reaches a running time threshold of the compressor, in the process of controlling the air conditioning system to work in different working stages in the refrigeration mode, adjusting at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the refrigeration mode according to the stage of the air conditioning system which works in the different working stages in the refrigeration mode;
wherein, according to the stage that the air conditioning system has worked in different working stages under the refrigeration mode, adjust at least one of the working time threshold of the air conditioning system, the indoor heat exchanger tube temperature threshold of the air conditioning system under the refrigeration mode, include:
if the stage of the air conditioning system working in different working stages in the refrigeration mode is a frequency limiting refrigeration stage, reducing the temperature threshold of the frequency limiting recovery inner tube in the temperature threshold of the tube of the indoor heat exchanger in the refrigeration mode by a first set temperature value;
if the working stages of the air conditioning system in different working stages in the refrigeration mode are a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the temperature threshold of the frequency limiting inner tube in the temperature threshold of the tube of the indoor heat exchanger in the refrigeration mode by a second set temperature value;
if the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reduction refrigeration stage, increasing the frequency reduction amplitude of the frequency of a compressor of the air conditioning system by a set frequency threshold value in the frequency reduction refrigeration stage in the refrigeration mode; the frequency reduction amplitude of the compressor frequency of the air conditioning system is the amplitude of the compressor frequency of the air conditioning system which is reduced by a first set frequency on the basis of the current running frequency.
6. The method of claim 5, wherein at least one of the operating time threshold of the air conditioning system and the indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode is adjusted according to the stage of the air conditioning system in the different operating stages in the cooling mode, further comprising:
under the condition that the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, after the frequency reducing amplitude of the frequency of a compressor of the air conditioning system is increased by a set frequency threshold, adjusting at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the refrigeration mode according to a continuous running period of the air conditioning system running according to a set interval period;
wherein, according to the continuous operation cycle of the air conditioning system operating according to the set interval cycle, at least one of the working time threshold of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger of the air conditioning system in the refrigeration mode is adjusted, including:
under the condition that the continuous operation period is a first set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a third set temperature value for the temperature threshold value of the frequency limiting inner tube in the temperature threshold value of the indoor heat exchanger tube in the refrigeration mode;
when the continuous operation period is a second set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air conditioning system by a first set time value;
when the continuous operation period is a third set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air conditioning system by a second set time value;
under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a detection time threshold value in working time threshold values of the air-conditioning system by a third set time value;
and under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing the detection time threshold value in the working time threshold values of the air-conditioning system by a fourth set time value.
7. A control device of an air conditioning system, characterized by comprising:
the air conditioning system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is configured to acquire the current running time of a compressor of the air conditioning system and acquire the working time threshold of the air conditioning system under the condition that the air conditioning system works in a cooling mode; the working time threshold of the air conditioning system comprises the following steps: a run time threshold for the compressor; wherein the running time threshold of the compressor is a time threshold for determining whether the air conditioning system enters anti-freezing protection;
a control unit configured to determine whether a current operation time of the compressor has reached an operation time threshold of the compressor;
the obtaining unit is further configured to obtain an indoor heat exchanger tube temperature of the air conditioning system and obtain an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode if the current running time of the compressor reaches the running time threshold of the compressor;
the control unit is further configured to control the air conditioning system to work in different working stages in the cooling mode according to the indoor heat exchanger tube temperature of the air conditioning system and the indoor heat exchanger tube temperature threshold in the cooling mode; the different working phases in the cooling mode comprise: at least one stage of an anti-freezing protection stage, a frequency limiting refrigeration stage, a frequency reducing refrigeration stage and a normal refrigeration stage.
8. The control device of the air conditioning system according to claim 7, wherein the indoor heat exchanger tube temperature threshold in the cooling mode includes: freezing protection inner tube temperature threshold, frequency limiting inner tube temperature threshold and frequency limiting recovery inner tube temperature threshold;
the control unit controls the air conditioning system to work in different working stages under the refrigeration mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger under the refrigeration mode, and the control unit comprises:
the working time threshold of the air conditioning system further comprises: a detection time threshold of the indoor heat exchanger tube temperature; within the detection time threshold of the indoor heat exchanger tube temperature, if the indoor heat exchanger tube temperature of the air conditioning system is less than or equal to the freezing protection inner tube temperature threshold, controlling the air conditioning system to work in an anti-freezing protection stage under the refrigeration mode;
if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the frequency-limiting inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency-limiting recovery inner tube, controlling the air-conditioning system to work in a frequency-limiting refrigeration stage under the refrigeration mode; in the limited frequency refrigeration stage in the refrigeration mode, the frequency of a compressor of the air conditioning system maintains the current running frequency;
if the temperature of the indoor heat exchanger tube of the air-conditioning system is greater than the temperature threshold of the freezing protection inner tube and the temperature of the indoor heat exchanger tube of the air-conditioning system is less than or equal to the temperature threshold of the frequency limiting inner tube, controlling the air-conditioning system to work in a frequency reduction refrigeration stage under the refrigeration mode; in the stage of frequency reduction refrigeration in the refrigeration mode, the frequency of a compressor of the air conditioning system is reduced by a first set frequency according to a first set speed on the basis of the current operating frequency;
and if the temperature of the indoor heat exchanger tube of the air conditioning system is greater than the temperature threshold of the freezing protection inner tube, controlling the air conditioning system to work in a normal refrigeration stage under the refrigeration mode.
9. The control device of the air conditioning system according to claim 8, wherein the control unit controls the air conditioning system to operate in the freeze protection phase in the cooling mode, and comprises:
controlling a compressor of the air conditioning system to stop, controlling an outdoor fan of the air conditioning system to stop in a delayed mode, and increasing the wind level of an indoor fan of the air conditioning system; wherein, heighten the windshield of the indoor fan of the air conditioning system includes: if the current wind gear of the indoor fan of the air-conditioning system is the highest wind gear, keeping the wind gear of the indoor fan of the air-conditioning system at the current wind gear; if the current wind gear of the indoor fan of the air-conditioning system is not the highest wind gear, the wind gear of the indoor fan of the air-conditioning system is increased to a set gear on the basis of the current wind gear;
and if the pipe temperature of the indoor heat exchanger of the air-conditioning system is greater than the temperature threshold of the frequency limiting recovery inner pipe and the compressor downtime of the air-conditioning system reaches the set downtime, controlling the air-conditioning system to recover to the normal refrigeration stage under the refrigeration mode.
10. The control device of an air conditioning system according to any one of claims 7 to 9, characterized by further comprising:
the control unit is further configured to, after controlling the air conditioning system to operate in different operating stages in the cooling mode, continue to control the air conditioning system to operate in different operating stages in the cooling mode according to the pipe temperature of the indoor heat exchanger of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger in the cooling mode at set interval periods.
11. The control device of an air conditioning system according to any one of claims 7 to 10, characterized by further comprising:
the control unit is further configured to adjust at least one of an operating time threshold of the air conditioning system and an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to the stage of the air conditioning system operated in the different operating stages in the cooling mode in the process of controlling the air conditioning system to operate in the different operating stages in the cooling mode after the current operating time of the compressor reaches the operating time threshold of the compressor;
wherein the control unit adjusts at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the cooling mode according to a stage in which the air conditioning system has worked in different working stages in the cooling mode, and includes:
if the stage of the air conditioning system working in different working stages in the refrigeration mode is a frequency limiting refrigeration stage, reducing the temperature threshold of the frequency limiting recovery inner tube in the temperature threshold of the tube of the indoor heat exchanger in the refrigeration mode by a first set temperature value;
if the working stages of the air conditioning system in the different working stages in the refrigeration mode are a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the temperature threshold value of the frequency limiting inner tube in the temperature threshold value of the indoor heat exchanger tube in the refrigeration mode by a second set temperature value;
if the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reduction refrigeration stage, increasing the frequency reduction amplitude of the frequency of a compressor of the air conditioning system by a set frequency threshold value in the frequency reduction refrigeration stage in the refrigeration mode; the frequency reduction amplitude of the compressor frequency of the air conditioning system is the amplitude of the compressor frequency of the air conditioning system which is reduced by a first set frequency on the basis of the current running frequency.
12. The apparatus of claim 11, wherein the control unit adjusts at least one of an operating time threshold of the air conditioning system and an indoor heat exchanger tube temperature threshold of the air conditioning system in the cooling mode according to a stage in which the air conditioning system has been operated in different operating stages in the cooling mode, further comprising:
under the condition that the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, after the frequency reducing amplitude of the frequency of a compressor of the air conditioning system is increased by a set frequency threshold, adjusting at least one of a working time threshold of the air conditioning system and a pipe temperature threshold of an indoor heat exchanger of the air conditioning system in the refrigeration mode according to a continuous running period of the air conditioning system running according to a set interval period;
wherein, the control unit adjusts at least one of the working time threshold of the air conditioning system and the pipe temperature threshold of the indoor heat exchanger of the air conditioning system in the refrigeration mode according to the continuous operation cycle of the air conditioning system operating according to the set interval cycle, and the control unit comprises:
under the condition that the continuous operation period is a first set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a third set temperature value for the temperature threshold value of the frequency limiting inner tube in the temperature threshold value of the indoor heat exchanger tube in the refrigeration mode;
when the continuous operation period is a second set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air conditioning system by a first set time value;
when the continuous operation period is a third set number and the working stages of the air conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, reducing the operation time threshold value in the working time threshold value of the air conditioning system by a second set time value;
under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing a detection time threshold value in working time threshold values of the air-conditioning system by a third set time value;
and under the condition that the continuous operation period is a fourth set number and the working stages of the air-conditioning system in different working stages in the refrigeration mode are an anti-freezing protection stage, a frequency limiting refrigeration stage and a frequency reducing refrigeration stage, increasing the detection time threshold value in the working time threshold values of the air-conditioning system by a fourth set time value.
13. An air conditioning system, comprising: the control device of an air conditioning system as claimed in any one of claims 7 to 12.
14. A storage medium characterized by comprising a stored program, wherein an apparatus in which the storage medium is located is controlled to execute the control method of the air conditioning system according to any one of claims 1 to 6 when the program is executed.
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