CN113154636B - Air conditioner defrosting control method and device, storage medium and air conditioner - Google Patents

Air conditioner defrosting control method and device, storage medium and air conditioner Download PDF

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CN113154636B
CN113154636B CN202110448866.9A CN202110448866A CN113154636B CN 113154636 B CN113154636 B CN 113154636B CN 202110448866 A CN202110448866 A CN 202110448866A CN 113154636 B CN113154636 B CN 113154636B
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air conditioner
defrosting
preset
temperatures
temperature
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CN113154636A (en
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杨乐
陈晓斌
古正荣
赵智翀
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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
    • F24F11/41—Defrosting; Preventing freezing
    • 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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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

Abstract

The present application relates to the field of communications technologies, and in particular, to an air conditioner defrosting control method, a defrosting control device, a computer-readable storage medium, and an air conditioner. The defrosting control method comprises the following steps: collecting temperatures of a plurality of outer pipes corresponding to a plurality of different positions of a heat exchanger of an air conditioner outdoor unit; determining preset conditions met by the temperatures of the outer pipes within preset time; and entering a defrosting program or exiting the defrosting program by the air conditioner according to the preset condition. Under the heating mode or the defrosting mode, the control logic can accurately detect and judge the actual pipe temperature of each part of the outdoor unit heat exchanger, and timely enter the defrosting stage or exit the defrosting stage, so that on one hand, the outdoor unit is prevented from continuously frosting to be thick to perform heat exchange with poor power consumption, on the other hand, the outdoor unit does not exit the defrosting stage too early or too late, the defrosting stage is prevented from being removed by defrosting without cleaning the frost layer of the outdoor unit heat exchanger, and the potential risk of reliability caused by excessive defrosting of the outdoor unit is avoided.

Description

Air conditioner defrosting control method and device, storage medium and air conditioner
Technical Field
The application relates to the technical field of air conditioner defrosting control, in particular to an air conditioner defrosting control method, a defrosting control device, a computer readable storage medium and an air conditioner.
Background
The flow path of the heat exchanger of the air conditioner outdoor unit in the current market is composed of two parts, wherein one part is a heat exchange part and consists of a gas distribution pipe assembly and a liquid collection pipe assembly; the second is a supercooling part which is composed of a supercooling pipe and a total cooling inlet and outlet. The supercooling pipe enables the refrigerant to be in a large supercooling state after the condensation process and before the throttling process is carried out in the air-conditioning refrigeration mode, so that the enthalpy value of the refrigerant including the throttling state is low, the enthalpy difference is increased after evaporation and heat absorption, and the whole heat exchange quantity is increased. However, in the heating mode, the existence of the supercooling pipe can bring adverse effects, and due to the existence of the supercooling pipe, the refrigerant generates unnecessary pressure drop or evaporation operation after flowing from the internal unit to the external unit, and then liquid separation is carried out for heat exchange, which indirectly causes waste of the heat exchange area at the lower part of the heat exchanger. Most importantly, the temperature sensing bag passes through the supercooling pipe section and then enters the heat exchange pipe section, and the pipe temperature position of the heat exchange pipe section is moved after being driven, so that the pipe temperature of the whole heat exchanger cannot be accurately detected at the position of the pipe temperature sensing bag in the prior art. The outer tube temperature plays decisive judgement effect to changing the frost at the heating in-process, and outer tube temperature detects inaccurate and makes the air conditioner get into later to change the frost stage or make to change the frost unclean, influences the user and experiences the travelling comfort of the heating in-service use of air conditioner to unnecessary consumption has been increased.
Disclosure of Invention
In order to solve the technical problems that in the prior art, the air conditioner enters a defrosting stage later or the defrosting is not clean due to inaccurate detection of the temperature of an outer pipe, the comfort experience of a user on the heating actual use of the air conditioner is influenced, and unnecessary power consumption is increased, the application provides an air conditioner defrosting control method, a defrosting control device, a computer readable storage medium and an air conditioner.
In a first aspect, the present application provides an air conditioner defrosting control method, which includes:
collecting temperatures of a plurality of outer pipes corresponding to a plurality of different positions of a heat exchanger of an air conditioner outdoor unit;
determining preset conditions met by the temperatures of the outer pipes within preset time;
and executing a preset program corresponding to the preset condition according to the preset condition, wherein the preset program comprises maintaining the current running program, entering a defrosting program or exiting the defrosting program.
In the air conditioner defrosting control method provided by the embodiment of the present invention, the executing a preset program corresponding to a preset condition according to the preset condition that a plurality of outer tube temperatures satisfy within a preset time includes: in the heating mode, if the temperatures of the outer pipes meet a first preset condition within a first preset time, the air conditioner enters a defrosting procedure.
In the defrosting control method of an air conditioner provided by the embodiment of the invention, the first preset condition is that the minimum value of the temperatures of the outer pipes is not less than a first preset temperature.
In the defrosting control method of an air conditioner provided by the embodiment of the present invention, the first preset condition is that an absolute value of a temperature difference between a minimum value of the temperatures of the plurality of outer pipes and an outdoor environment temperature is not greater than a second preset temperature.
In the air conditioner defrosting control method provided by the embodiment of the present invention, the executing a preset program corresponding to a preset condition according to the preset condition that a plurality of outer tube temperatures satisfy within a preset time includes: in the defrosting mode, if the temperatures of the outer pipes meet a second preset condition within a second preset time, the air conditioner exits the defrosting program.
In the defrosting control method of an air conditioner provided by the embodiment of the invention, the second preset condition is that the minimum value of the temperatures of the outer pipes is not less than a third preset temperature.
In the defrosting control method of an air conditioner provided by the embodiment of the present invention, the second preset condition includes that an extreme value of the temperatures of the plurality of outer tubes is not less than a fourth preset temperature, where the extreme value is a difference between a maximum value and a minimum value of the temperatures of the plurality of outer tubes.
In the defrosting control method of an air conditioner according to an embodiment of the present invention, the acquiring the temperatures of the outer pipes corresponding to a plurality of different positions of a heat exchanger of an outdoor unit of the air conditioner includes: the method comprises the steps of collecting the temperature of a first outer pipe and the temperature of a second outer pipe corresponding to two different positions of a heat exchanger of the outdoor unit of the air conditioner, wherein the temperature of the first outer pipe is the temperature of a heat exchange pipe of the heat exchanger of the outdoor unit of the air conditioner, and the temperature of the second outer pipe is the temperature of a supercooling pipe of the heat exchanger of the outdoor unit.
In a second aspect, the present application provides an air conditioner defrosting control apparatus, comprising:
the collecting module is used for collecting the temperatures of the outer pipes corresponding to a plurality of different positions of the heat exchanger of the outdoor unit of the air conditioner;
the judging module is used for determining that the temperatures of the outer pipes meet preset conditions within preset time;
and the execution module is used for controlling the air conditioner to enter a defrosting program or exit the defrosting program according to the preset condition met by the temperatures of the outer pipes within preset time.
In a third aspect, the present application provides a computer-readable storage medium storing computer instructions for causing a computer to execute the air conditioner defrosting control method provided in the first aspect of the embodiments of the present invention.
In a fourth aspect, the present application provides an air conditioner including the air conditioner defrosting control apparatus provided in the second aspect of the embodiment of the present invention.
In the defrosting control method of the air conditioner in the embodiment of the invention, under the heating mode or the defrosting mode, the control logic can accurately detect and judge the actual pipe temperature of each part of the heat exchanger of the outdoor unit and timely enter the defrosting stage or exit the defrosting stage, so that on one hand, the outdoor unit is prevented from continuously frosting very thickly and performing poor power consumption heat exchange, on the other hand, the outdoor unit is prevented from exiting the defrosting stage too early or too late, the outdoor unit is prevented from frosting and exiting the defrosting stage when the frost layer of the heat exchanger of the outdoor unit is not completely frosted, and the potential risk of reliability caused by excessive defrosting of the outdoor unit is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a defrosting control method of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a method for controlling an air conditioner to defrost according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating another method for controlling defrosting of an air conditioner according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a control method for defrosting exiting of an air conditioner according to an embodiment of the present disclosure;
FIG. 5 is a schematic flowchart illustrating another control method for defrosting exiting of an air conditioner according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of functional modules of a defrosting control device of an air conditioner according to an embodiment of the present application; and
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.
Fig. 1 is a diagram illustrating a defrosting control method for an air conditioner according to an embodiment of the present disclosure, where the air conditioner includes an indoor unit and an outdoor unit, and the defrosting control method includes steps S1 to S3.
S1: the temperatures of the outer pipes corresponding to a plurality of different positions of the heat exchanger of the outdoor unit of the air conditioner are collected.
In this step, a plurality of outer tube temperatures corresponding to a plurality of different positions of the heat exchanger of the outdoor unit of the air conditioner are collected corresponding to the heat exchanger of the outdoor unit of the air conditioner and are respectively recorded as first outer tube temperatures T1Second outer tube temperature T2… …, nth outer tube temperature TnWherein n is an integer of not less than 2. Wherein, besides the temperature of the outer tube at each position, the temperature acquisition is required to be recordedAnd thus for obtaining the duration of time that the outer tube temperature is within a certain threshold range. At least one of the collection positions of the temperature of the outer pipe is distributed at the heat exchange pipe of the outdoor unit heat exchanger, and at least one of the collection positions of the temperature of the outer pipe is distributed at the supercooling pipe of the outdoor unit heat exchanger.
S2: and determining a preset condition met by the temperatures of the outer pipes within a preset time. In other words, the temperature T of the first outer tube is determined1Second outer tube temperature T2… …, nth outer tube temperature TnWhether a preset condition is met within a preset time or not; for entering the defrosting mode from the heating mode, the preset condition is a judgment condition for entering the defrosting procedure; for the on-going defrosting mode, the preset condition is a judgment condition for exiting the defrosting program.
S3: and executing a preset program corresponding to the preset condition according to the preset condition met by the temperatures of the outer pipes within the preset time, wherein the preset program comprises maintaining the current running program, entering a defrosting program or exiting the defrosting program. For entering the defrosting mode from the heating mode, if the temperatures of the outer pipes meet the judgment condition for entering the defrosting program within the preset time, the air conditioner enters the defrosting program, and if the temperatures of the outer pipes cannot meet the judgment condition for entering the defrosting program within the preset time, the current heating mode is continuously kept; for the ongoing defrosting mode, if the temperatures of the outer pipes meet the judgment condition for exiting the defrosting program within the preset time, the air conditioner exits the defrosting program, and if the temperatures of the outer pipes cannot meet the judgment condition for exiting the defrosting program within the preset time, the current defrosting mode is continuously maintained.
In the above embodiment, in the heating mode or the defrosting mode, by the setting mode of collecting the temperatures of the plurality of outer tubes, the situation that in the prior art, the actual condition of the whole heat exchanger cannot be accurately reflected by the tube temperature measured by the position of the outer tube temperature sensing bulb because the refrigerant firstly passes through the cold tube section and then enters the heat exchange tube section and the tube temperature position of the heat exchange tube section is passively moved back can be avoided or alleviated. The control method of the embodiment of the invention can enable the control logic to accurately detect and judge the actual pipe temperature of each part of the heat exchanger of the outdoor unit and timely enter the defrosting stage or exit the defrosting stage, thereby on one hand, avoiding the outdoor unit from continuously frosting very thickly and carrying out poor power consumption heat exchange, on the other hand, not exiting the defrosting stage too early or too late, avoiding the defrosting stage exiting with frost when the frost layer of the heat exchanger of the outdoor unit is not completely frosted, and avoiding the potential risk of reliability caused by excessive defrosting of the outdoor unit.
By the novel defrosting control method, the heat exchanger of the outdoor unit of the air conditioner frosts to a certain degree in the heating mode, and the outdoor unit of the air conditioner can enter a defrosting stage in time. Two specific alternative air conditioner defrosting control methods are shown in fig. 2 and 3.
As shown in fig. 2, the control method of the air conditioner entering defrosting includes S101, S201, and S301.
S101: when the air conditioner is in the heating mode, the temperatures of the outer pipes corresponding to a plurality of different positions of the heat exchanger of the outdoor unit of the air conditioner are collected, and the specific implementation manner of this step refers to step S1 in the foregoing embodiment, which is not described herein again.
S201: determining a plurality of outer tube temperatures at a first preset time t1A first preset condition is satisfied. In other words, the temperature T of the first outer tube is determined1Second outer tube temperature T2… …, nth outer tube temperature TnWhether it is at the first preset time t1The temperature of the outer pipe is set to be not higher than a first preset temperature.
S301: according to a plurality of outer pipe temperatures in a first preset time t1And if the first preset condition is met, the air conditioner enters a defrosting program. If the temperatures of the outer pipes meet the judgment condition of entering the defrosting program within the first preset time, namely the minimum value of the temperatures of the outer pipes is within the first preset time t1If the temperature is not more than the first preset temperature continuously, the air conditioner enters a defrosting procedure; if the temperatures of the outer pipes cannot meet the judgment of entering the defrosting program within a first preset timeOff condition, i.e. minimum value of a plurality of said outer tube temperatures for a first preset time t1If the temperature of the air conditioner is not continuously higher than the first preset temperature, the air conditioner keeps the current heating mode to operate.
As shown in fig. 3, the control method of the air conditioner entering defrosting includes S102, S202 and S302.
S102: when the air conditioner is in the heating mode, the temperatures of the outer pipes corresponding to a plurality of different positions of the heat exchanger of the outdoor unit of the air conditioner are collected, and the specific implementation manner of this step refers to step S1 in the foregoing embodiment, which is not described herein again.
S202: determining a plurality of outer tube temperatures at a first preset time t1A first preset condition is satisfied. In other words, the temperature T of the first outer tube is determined1Second outer tube temperature T2… …, nth outer tube temperature TnWhether it is at the first preset time t1The temperature control device internally meets a first preset condition, wherein the first preset condition is set to be that the absolute value of the temperature difference value between the minimum value of the temperatures of the outer pipes and the outdoor environment temperature is not less than a second preset temperature.
S302: according to a plurality of outer pipe temperatures in a first preset time t1And if the first preset condition is met, the air conditioner enters a defrosting program. If the temperatures of the outer pipes meet the judgment condition of entering the defrosting program within the first preset time, namely the absolute value of the temperature difference value between the minimum value of the temperatures of the outer pipes and the outdoor environment temperature within the first preset time t1If the internal temperature is not less than the second preset temperature continuously, the air conditioner enters a defrosting procedure; if the temperatures of the outer pipes cannot meet the judgment condition of entering the defrosting program within the first preset time, namely the absolute value of the temperature difference value between the minimum value of the temperatures of the outer pipes and the outdoor environment temperature within the first preset time t1If the temperature of the air conditioner is not less than the second preset temperature, the air conditioner keeps the current heating mode to operate.
It should be noted that the control method for entering defrosting provided in fig. 2 and 3 is applicable to different working scenarios. When the outdoor ambient temperature is high (for example, when the external ambient temperature is higher than 0 ℃), it is preferable to use the one shown in fig. 2Entering a defrosting control method, wherein one of executing conditions of entering defrosting is that the executing temperature of entering defrosting is a first preset temperature (for example, the first preset temperature A can be selected to be-3 ℃, and the value can be freely determined by different systems), judging the minimum value of the temperatures of the outer pipes, comparing the minimum value with the first preset temperature, and if the minimum value is not more than A and is lower than the minimum value of the value A, continuously operating the minimum value for a first preset time t1Then, entering a defrosting stage, wherein the minimum value of the temperatures of the outer pipes is compared with a first preset temperature to find out the position with lower pipe temperature as soon as possible, and considering that when the lower pipe temperature reaches the value A and runs for a certain time under the working condition, the frost layer on the heat exchanger reaches a certain thickness, and the heat exchange is deteriorated and needs to enter the defrosting stage, and according to the air conditioners in different working environments, the first preset time t is the first preset time t1The value range of (1) is not less than 0.5min and not more than t1Less than or equal to 6min, usually at t1After 3min, namely the working condition that the minimum value of the temperatures of the outer pipes is not more than the first preset temperature A, is continuously operated for 3min, the frost layer on the heat exchanger can be basically determined to be removed to the extent required. For another example, when the outdoor environment temperature is sufficiently low, for example, lower than-7 ℃, it is preferable to adopt the entering defrosting control method shown in fig. 3, where the entering defrosting is performed under the condition that the absolute value of the temperature difference value between the minimum value of the plurality of outer tube temperatures and the outdoor environment temperature is determined. Therefore, the first preset condition for judging the defrosting can be correspondingly adjusted and changed according to the external environment parameters (including but not limited to temperature, humidity and air pressure) of the air conditioner in the working process, and the defrosting is conveniently and timely performed by finding the pipe temperature most suitable for the actual frosting condition, so that the heating operation with low power consumption and low comfort is avoided.
In the above embodiments, the first preset condition for determining whether to enter the defrosting mode includes, but is not limited to, the forms in fig. 2 and fig. 3, and the first preset condition may be in the form of a multi-segment piecewise function, and the internal function factor may include the outer loop temperature, the operation time, the temperature difference between the outer loop temperature and the outer tube temperature, and the like, and as an alternative example, the piecewise function may be expressed as shown in table 1.
TABLE 1 corresponding relationship between the ambient temperature and the first predetermined condition
Figure BDA0003038002240000091
By the novel defrosting control method, the defrosting stage can be timely exited after the heat exchanger of the outdoor unit of the air conditioner is fully and cleanly defrosted in the defrosting mode. Two specific alternative control methods for the air conditioner to exit defrosting are shown in fig. 4 and 5.
As shown in fig. 4, the control method of the air conditioner exiting defrosting includes S103, S203 and S303.
S103: when the air conditioner is in the defrosting mode, the temperatures of the outer pipes corresponding to a plurality of different positions of the heat exchanger of the outdoor unit of the air conditioner are collected, and the specific implementation manner of this step refers to step S1 in the foregoing embodiment, which is not described herein again.
S203: determining a plurality of outer tube temperatures at a second preset time t2A second preset condition is satisfied. In other words, the temperature T of the first outer tube is determined1Second outer tube temperature T2… …, nth outer tube temperature TnWhether it is at the second preset time t2The temperature of the outer pipe is set to be not lower than a third preset temperature.
S303: according to a plurality of outer pipe temperatures in a second preset time t2And if the second preset condition is met, the air conditioner exits the defrosting program. If the temperatures of the outer pipes meet the judgment condition for exiting the defrosting program within the second preset time, namely the minimum value of the temperatures of the outer pipes is within the second preset time t2If the internal temperature is not less than the third preset temperature continuously, the air conditioner exits the defrosting program; if the temperatures of the outer pipes cannot meet the judgment condition for exiting the defrosting program within the second preset time, namely the minimum value of the temperatures of the outer pipes is within the second preset time t2Internal failure not to continue to be less than thirdAnd if the temperature is set, the air conditioner keeps the current defrosting mode to operate.
As shown in fig. 5, the control method for the air conditioner to exit defrosting includes S104, S204 and S304.
S104: when the air conditioner is in the defrosting mode, the temperatures of the outer pipes corresponding to a plurality of different positions of the heat exchanger of the outdoor unit of the air conditioner are collected, and the specific implementation manner of the step refers to the step S in the foregoing embodiment1And will not be described in detail herein.
S204: determining a plurality of outer tube temperatures at a second preset time t2A second preset condition is satisfied. In other words, the temperature T of the first outer tube is judged1Second outer tube temperature T2… …, nth outer tube temperature TnWhether it is at the second preset time t2The temperature control device is characterized in that a second preset condition is met, the second preset condition is set to be that the maximum value of the outer tube temperatures is larger than a third preset temperature, the outer tube temperatures are multiple, the minimum value of the outer tube temperatures is smaller than the third preset temperature, and the difference between the maximum value and the minimum value of the outer tube temperatures is not smaller than a fourth preset temperature.
S304: according to a plurality of outer pipe temperatures in a second preset time t2And if the second preset condition is met, the air conditioner exits the defrosting program. If the plurality of outer tube temperatures meet the judgment condition for exiting the defrosting program within the second preset time, specifically, the minimum value of the plurality of outer tube temperatures is continuously lower than the third preset temperature, and the maximum value of the plurality of outer tube temperatures is higher than the third preset temperature, under the precondition, the difference value between the maximum value and the minimum value of the plurality of outer tube temperatures needs to be met within the second preset time t2If the internal temperature is not less than the fourth preset temperature continuously, the air conditioner exits the defrosting program; if the plurality of outer tube temperatures cannot meet the judgment condition for exiting the defrosting program within the second preset time, namely even under the condition that the precondition is met, the difference value between the maximum value and the minimum value of the plurality of outer tube temperatures is within the second preset time t2If the temperature of the air conditioner is not less than the fourth preset temperature, the air conditioner keeps the current defrosting mode to operate.
It should be noted that the control methods for defrosting exiting provided in fig. 4 and 5 are applicable to different working scenarios. When the outdoor environment temperature is high (for example, the external environment temperature is higher than 0 ℃), it is preferable to adopt the defrosting exiting control method shown in fig. 4, where one of the execution conditions of defrosting exiting is set as the third preset temperature C (for example, the third preset temperature C may be selected as 3 ℃, and the C value may be determined freely by different systems), determine the minimum value among the temperatures of the outer tubes, compare the minimum value with the third preset temperature B, and if the minimum value is not less than C and is higher than the minimum value of C, the minimum value is continuously operated for the second preset time t2And then, exiting the defrosting stage, wherein the minimum value of the temperatures of the outer pipes is compared with the third preset temperature C, so as to find out the position with the lower pipe temperature as soon as possible, and considering that when the lower pipe temperature value reaches the third preset temperature in the working condition and runs for a certain time, the frost layer on the heat exchanger is completely defrosted, namely no frost layer exists, and at the moment, the defrosting mode needs to be exited and the heating mode needs to be returned again to provide heating experience for the user. According to the air conditioners in different working environments, the first preset time t2Has a value range of t being not more than 20s2120s or less, usually at t2After 90s, that is, the working condition that the minimum value of the temperatures of the outer pipes is not less than the third preset temperature C has been continuously operated for 90s, it can be basically determined that the frost layer on the heat exchanger has been removed. Or, when it is determined that the minimum value of the outer tube temperatures continues to be lower than the defrosting execution temperature C for a certain time, and the maximum value of the outer tube temperatures continues to be higher than the defrosting execution temperature C for a certain time, but it is determined that the temperature difference between the maximum value and the minimum value of the outer tube temperatures is greater than the fourth preset temperature D, the defrosting stage should be exited because the temperature difference between the two temperatures is greater than the D value, which indicates that one of the tube temperatures is sufficiently high, and the exiting defrosting stage should be executed to ensure the overall reliability of the machine in consideration of the reliability risk, that is, the control method provided in fig. 5.
In the above embodiments, the second preset condition for determining whether to exit the defrosting mode includes, but is not limited to, the forms shown in fig. 4 and 5, and the second preset condition may be in the form of a multi-segment piecewise function, where the inner function factor may include the outer loop temperature, the operation time, the temperature difference between the outer loop temperature and the outer tube temperature, and the like, and as an optional example, the piecewise function may be expressed as shown in table 2.
TABLE 2 corresponding relationship between the ambient temperature and the third preset temperature
Ambient temperature TOuter ring Third predetermined temperature C
TOuter ring≥-5℃ C＝14℃
TOuter ring＜-5℃ C＝5℃
In the defrosting control method shown in fig. 1 to 5, a first outer tube temperature and a second outer tube temperature corresponding to two different positions of a heat exchanger of an outdoor unit of an air conditioner are preferably collected, the first outer tube temperature is a temperature at a heat exchange tube of the heat exchanger of the outdoor unit of the air conditioner, the second outer tube temperature is a temperature at a supercooling tube of the heat exchanger of the outdoor unit, and the defrosting control method provided by the embodiment of the invention is implemented by the first outer tube temperature and the second outer tube temperature. The technical staff is verified through the experiment and learns, can fully guarantee through first outer tube temperature and second outer tube temperature that the air conditioner gets into and withdraw from the accurate control of defrosting procedure to can greatly reduced cost, and promote maneuverability.
As shown in fig. 6, according to another embodiment of the present application, there is also provided an air conditioner defrosting control device, which includes a collecting module 11, a determining module 12, and an executing module 13, where the collecting module 11 is configured to collect outer tube temperatures corresponding to a plurality of different positions of a heat exchanger of an outdoor unit of an air conditioner; the judging module 12 is configured to determine that the temperatures of the outer tubes meet a preset condition within a preset time; the execution module 13 is configured to control the air conditioner to enter a defrosting procedure or exit the defrosting procedure according to the preset condition that the temperatures of the outer pipes meet within a preset time. Specifically, the specific process of implementing the functions of each module in the apparatus according to the embodiment of the present invention may refer to the related description in the method embodiment, and is not described herein again.
As shown in fig. 7, according to another embodiment of the present application, there is also provided an electronic device including a processor 1401, a communication interface 1402, a memory 1403 and a communication bus 1404, wherein the processor 1401, the communication interface 1402 and the memory 1403 are communicated with each other through the communication bus 1404. The memory 1403 is used for storing a computer program; the processor 1401 is configured to implement the steps of the embodiment of the defrosting control method applied to the air conditioner as described above when executing the program stored in the memory 1403.
The embodiment of the present application also provides a computer-readable storage medium, which stores computer instructions for causing a computer to execute the steps of the embodiment of the defrosting control method applied to the air conditioner.
The bus mentioned in the electronic device applied to the server side or the terminal may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
collecting the temperatures of outer pipes corresponding to a plurality of different positions of a heat exchanger of an outdoor unit of an air conditioner;
determining preset conditions met by the temperatures of the outer pipes within preset time;
executing a preset program corresponding to a preset condition according to the preset condition met by the temperatures of the outer pipes within a preset time, wherein the preset program comprises a current operation program, a defrosting program entering program and a defrosting program exiting program;
the executing of the preset program corresponding to the preset condition according to the preset condition that the plurality of outer tube temperatures meet within the preset time includes: in the defrosting mode, if the temperatures of the outer pipes meet a second preset condition within a second preset time, the air conditioner exits a defrosting program;
the second preset condition includes: the minimum value of the plurality of outer tube temperatures is continuously smaller than a third preset temperature, the maximum value of the plurality of outer tube temperatures is larger than the third preset temperature, and the extreme value of the plurality of outer tube temperatures is continuously not smaller than a fourth preset temperature within a second preset time, wherein the extreme value is the difference value between the maximum value and the minimum value of the plurality of outer tube temperatures.
2. The air conditioner defrosting control method according to claim 1, wherein the executing of the preset program corresponding to the preset condition according to the preset condition that the plurality of outer tube temperatures satisfy within a preset time includes: in the heating mode, if the temperatures of the outer pipes meet a first preset condition within a first preset time, the air conditioner enters a defrosting procedure.
3. The air conditioner defrosting control method according to claim 2 wherein the first preset condition is that a minimum value of the plurality of outer tube temperatures is not greater than a first preset temperature.
4. The air conditioner defrosting control method according to claim 2, wherein the first preset condition is that an absolute value of a difference between a minimum value of the plurality of outer tube temperatures and an outdoor ambient temperature is not less than a second preset temperature.
5. The air conditioner defrosting control method of claim 1 wherein the collecting the temperatures of the outer tube corresponding to a plurality of different locations of a heat exchanger of an outdoor unit of the air conditioner comprises: the method comprises the steps of collecting the temperature of a first outer pipe and the temperature of a second outer pipe corresponding to two different positions of a heat exchanger of the outdoor unit of the air conditioner, wherein the temperature of the first outer pipe is the temperature of a heat exchange pipe of the heat exchanger of the outdoor unit of the air conditioner, and the temperature of the second outer pipe is the temperature of a supercooling pipe of the heat exchanger of the outdoor unit.
6. An air conditioner defrosting control apparatus for performing the air conditioner defrosting control method according to any one of claims 1 to 5, characterized by comprising:
the collecting module is used for collecting the temperatures of the outer pipes corresponding to a plurality of different positions of the heat exchanger of the outdoor unit of the air conditioner;
the judging module is used for determining that the temperatures of the outer pipes meet preset conditions within preset time;
and the execution module is used for controlling the air conditioner to enter a defrosting program or exit the defrosting program according to the preset condition met by the temperatures of the outer pipes within preset time.
7. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions that cause a computer to execute the air conditioner defrosting control method of any one of claims 1 to 5.
8. An air conditioner characterized by comprising the air conditioner defrosting control device of claim 6.
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