CN114110928A - Defrosting control method, air conditioner and computer readable storage medium - Google Patents
Defrosting control method, air conditioner and computer readable storage medium Download PDFInfo
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- CN114110928A CN114110928A CN202010892589.6A CN202010892589A CN114110928A CN 114110928 A CN114110928 A CN 114110928A CN 202010892589 A CN202010892589 A CN 202010892589A CN 114110928 A CN114110928 A CN 114110928A
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- 238000010257 thawing Methods 0.000 title claims abstract description 161
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 58
- 238000004891 communication Methods 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 4
- 238000012067 mathematical method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
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- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a defrosting control method, an air conditioner and a computer readable storage medium, wherein the defrosting control method comprises the following steps: when the air conditioner is in a heating operation mode, acquiring the temperature of a first evaporator of an indoor unit in the air conditioner, and acquiring the temperature of indoor environment; adding the indoor environment temperature and a preset fluctuation value, and taking the obtained value as a defrosting starting threshold value; judging whether the first evaporator temperature is less than the defrosting starting threshold value or not; and if the temperature of the first evaporator is less than the defrosting opening threshold value, controlling the air conditioner to enter a defrosting mode, and controlling the opening degree of an electronic expansion valve in the indoor unit to be a preset defrosting opening degree. The invention realizes defrosting of the air conditioner without communication between the indoor unit and the outdoor unit and prevents the compressor from being damaged during defrosting.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method, an air conditioner and a computer readable storage medium.
Background
With the improvement of living standard of people, the demand of people on the air conditioner is not limited to the ordinary refrigeration function any more, and the air conditioner is required to realize the heating function. In order to improve the user experience, the air conditioner generally has a defrosting function.
However, when the outdoor unit and the indoor unit cannot communicate with each other, the outdoor unit cannot notify the indoor unit of defrosting, which affects the heating effect of the air conditioner, and meanwhile, when the air conditioner is in the heating operation mode, the electronic expansion valve of the indoor unit is in the fully open state, that is, the indoor unit is in the non-throttling state, if the indoor unit is not switched to the throttling state in time during defrosting, the air conditioning system will return liquid, which results in damage to the compressor. Therefore, how to control the air conditioner to defrost when the outdoor unit and the indoor unit are in a non-communication state and how to prevent the compressor from being damaged when the air conditioner enters a defrosting mode become problems to be solved.
Disclosure of Invention
The invention mainly aims to provide a defrosting control method, an air conditioner and a computer readable storage medium, and aims to realize defrosting of the air conditioner without communication between an indoor unit and an outdoor unit and prevent a compressor from being damaged during defrosting.
In order to achieve the above object, the present invention provides a defrosting control method, comprising:
when the air conditioner is in a heating operation mode, acquiring the temperature of a first evaporator of an indoor unit in the air conditioner, and acquiring the temperature of indoor environment;
adding the indoor environment temperature and a preset fluctuation value, and taking the obtained value as a defrosting starting threshold value;
judging whether the first evaporator temperature is less than the defrosting starting threshold value or not;
and if the temperature of the first evaporator is less than the defrosting opening threshold value, controlling the air conditioner to enter a defrosting mode, and controlling the opening degree of an electronic expansion valve in the indoor unit to be a preset defrosting opening degree.
Optionally, when the air conditioner is in a heating operation mode, the step of obtaining a first evaporator temperature of an indoor unit in the air conditioner and obtaining an indoor environment temperature includes:
when the air conditioner is in a heating operation mode, acquiring a first evaporator coil temperature of an indoor unit in the air conditioner through an evaporator coil temperature sensor, and acquiring a first evaporator outlet temperature of the indoor unit through an evaporator outlet temperature sensor;
determining whether the first evaporator coil temperature is greater than the first evaporator outlet temperature;
if the temperature of the first evaporator coil is higher than the outlet temperature of the first evaporator, taking the temperature of the first evaporator coil as the temperature of the first evaporator of the indoor unit, and acquiring the indoor environment temperature through an indoor environment temperature sensor;
and if the temperature of the first evaporator coil is less than or equal to the outlet temperature of the first evaporator, taking the outlet temperature of the first evaporator as the temperature of the first evaporator of the indoor unit, and acquiring the indoor environment temperature through an indoor environment temperature sensor.
Optionally, when the air conditioner is in the heating operation mode, the step of obtaining a first evaporator coil temperature of an indoor unit in the air conditioner through an evaporator coil temperature sensor, and obtaining a first evaporator outlet temperature of the indoor unit through an evaporator outlet temperature sensor includes:
when the air conditioner is in a heating operation mode, acquiring a plurality of evaporator coil temperatures through a plurality of evaporator coil temperature sensors, and acquiring a plurality of evaporator outlet temperatures through a plurality of evaporator outlet temperature sensors;
carrying out average operation on the temperatures of the plurality of evaporator coils, and taking the obtained average value as the temperature of a first evaporator coil of an indoor unit in the air conditioner;
and carrying out average operation on the outlet temperatures of the plurality of evaporators, and taking the obtained average value as the outlet temperature of the first evaporator of the indoor unit.
Optionally, the defrosting control method further comprises:
when the air conditioner is defrosted, acquiring the temperature of a second evaporator of the indoor unit;
judging whether the second evaporator temperature is greater than or equal to a preset defrosting exit threshold value or not;
and if the temperature of the second evaporator is greater than or equal to the preset defrosting exit threshold, controlling the air conditioner to exit the defrosting mode, and controlling the opening degree of the electronic expansion valve to be a preset fixed opening degree.
Optionally, the step of obtaining the temperature of the second evaporator of the indoor unit when the air conditioner is defrosted includes:
when the air conditioner defrosts, acquiring the temperature of a second evaporator coil of the indoor unit through an evaporator coil temperature sensor, and acquiring the outlet temperature of a second evaporator of the indoor unit through an evaporator outlet temperature sensor;
determining whether the second evaporator coil temperature is less than the second evaporator outlet temperature;
if the second evaporator coil temperature is lower than the second evaporator outlet temperature, taking the second evaporator coil temperature as the second evaporator temperature of the indoor unit;
if the temperature of the second evaporator coil is greater than or equal to the outlet temperature of the second evaporator, taking the outlet temperature of the second evaporator as the temperature of the second evaporator of the indoor unit
Optionally, the step of obtaining a second evaporator coil temperature of the indoor unit by an evaporator coil temperature sensor and obtaining a second evaporator outlet temperature of the indoor unit by an evaporator outlet temperature sensor when the air conditioner defrosts includes:
when the air conditioner defrosts, acquiring a plurality of evaporator coil temperatures through a plurality of evaporator coil temperature sensors, and acquiring a plurality of evaporator outlet temperatures through a plurality of evaporator outlet temperature sensors;
carrying out average operation on the temperatures of the plurality of evaporator coils, and taking the obtained average value as the temperature of a second evaporator coil of an indoor unit in the air conditioner;
and carrying out average operation on the outlet temperatures of the plurality of evaporators, and taking the obtained average value as the outlet temperature of the second evaporator of the indoor unit.
Optionally, before the step of obtaining a first evaporator temperature of an indoor unit in the air conditioner and obtaining an indoor environment temperature when the air conditioner is in a heating operation mode, the method further includes:
when a four-way valve control signal is received, judging whether the four-way valve control signal is a heating control signal or not;
if the four-way valve control signal is the heating control signal, controlling the air conditioner to enter a heating running mode;
and when the air conditioner is in a heating operation mode, controlling the opening degree of an electronic expansion valve of an indoor unit in the air conditioner to be a preset fixed opening degree.
Further, to achieve the above object, the present invention also provides an air conditioner including: the defrosting control method comprises a memory, a processor and a defrosting control program stored on the memory and capable of running on the processor, wherein the defrosting control program realizes the steps of the defrosting control method when being executed by the processor.
Optionally, the air conditioner is provided with an evaporator coil temperature sensor and an evaporator outlet temperature sensor which are connected with the processor, wherein the evaporator coil temperature sensor is arranged on a coil of an evaporator of an indoor unit in the air conditioner, and the evaporator outlet temperature sensor is arranged on a branch outlet of the evaporator.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium having a defrosting control program stored thereon, which when executed by a processor, implements the steps of the defrosting control method as described above.
The invention provides a defrosting control method, an air conditioner and a computer readable storage medium, when the air conditioner is in a heating operation mode, the temperature of a first evaporator of an indoor unit in the air conditioner is obtained, and the indoor environment temperature is obtained; adding the indoor environment temperature and a preset fluctuation value, and taking the obtained value as a defrosting starting threshold value; judging whether the temperature of the first evaporator is less than a defrosting starting threshold value or not; and if the temperature of the first evaporator is less than the defrosting opening threshold value, controlling the air conditioner to enter a defrosting mode, and controlling the opening degree of an electronic expansion valve in the indoor unit to be a preset defrosting opening degree. When the air conditioner is in a heating operation mode, the temperature of an evaporator of an indoor unit in the air conditioner is compared with the temperature of indoor environment, then the air conditioner is controlled to defrost according to a comparison result, the outdoor unit is not required to inform the indoor unit of defrosting, so that defrosting control of the outdoor unit and the indoor unit in a non-communication state can be realized, and finally, when the air conditioner enters the defrosting mode, the opening degree of an electronic expansion valve in the indoor unit is controlled to be a preset defrosting opening degree, the indoor unit is switched to a throttling state, so that liquid return of an air conditioning system is prevented, and the compressor is prevented from being damaged.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of the defrosting control method according to the present invention;
FIG. 3 is a schematic flow chart of a third embodiment of the defrosting control method according to the present invention;
fig. 4 is a schematic flow chart of a defrosting control method according to a fourth embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention is an air conditioner which can be an air-cooled air conditioner, a variable frequency air conditioner, a water-cooled air conditioner, a fixed frequency air conditioner, a split air conditioner and the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU (Central Processing Unit), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a defrosting control program.
In the terminal shown in fig. 1, the processor 1001 may be configured to call a defrosting control program stored in the memory 1005 and perform the following operations:
when the air conditioner is in a heating operation mode, acquiring the temperature of a first evaporator of an indoor unit in the air conditioner, and acquiring the temperature of indoor environment;
adding the indoor environment temperature and a preset fluctuation value, and taking the obtained value as a defrosting starting threshold value;
judging whether the first evaporator temperature is less than the defrosting starting threshold value or not;
and if the temperature of the first evaporator is less than the defrosting opening threshold value, controlling the air conditioner to enter a defrosting mode, and controlling the opening degree of an electronic expansion valve in the indoor unit to be a preset defrosting opening degree.
Further, the processor 1001 may be configured to call a defrosting control program stored in the memory 1005, and further perform the following operations:
when the air conditioner is in a heating operation mode, acquiring a first evaporator coil temperature of an indoor unit in the air conditioner through an evaporator coil temperature sensor, and acquiring a first evaporator outlet temperature of the indoor unit through an evaporator outlet temperature sensor;
determining whether the first evaporator coil temperature is greater than the first evaporator outlet temperature;
if the temperature of the first evaporator coil is higher than the outlet temperature of the first evaporator, taking the temperature of the first evaporator coil as the temperature of the first evaporator of the indoor unit, and acquiring the indoor environment temperature through an indoor environment temperature sensor;
and if the temperature of the first evaporator coil is less than or equal to the outlet temperature of the first evaporator, taking the outlet temperature of the first evaporator as the temperature of the first evaporator of the indoor unit, and acquiring the indoor environment temperature through an indoor environment temperature sensor.
Further, the processor 1001 may be configured to call a defrosting control program stored in the memory 1005, and further perform the following operations:
when the air conditioner is in a heating operation mode, acquiring a plurality of evaporator coil temperatures through a plurality of evaporator coil temperature sensors, and acquiring a plurality of evaporator outlet temperatures through a plurality of evaporator outlet temperature sensors;
carrying out average operation on the temperatures of the plurality of evaporator coils, and taking the obtained average value as the temperature of a first evaporator coil of an indoor unit in the air conditioner;
and carrying out average operation on the outlet temperatures of the plurality of evaporators, and taking the obtained average value as the outlet temperature of the first evaporator of the indoor unit.
Further, the processor 1001 may be configured to call a defrosting control program stored in the memory 1005, and further perform the following operations:
when the air conditioner is defrosted, acquiring the temperature of a second evaporator of the indoor unit;
judging whether the second evaporator temperature is greater than or equal to a preset defrosting exit threshold value or not;
and if the temperature of the second evaporator is greater than or equal to the preset defrosting exit threshold, controlling the air conditioner to exit the defrosting mode, and controlling the opening degree of the electronic expansion valve to be a preset fixed opening degree.
Further, the processor 1001 may be configured to call a defrosting control program stored in the memory 1005, and further perform the following operations:
when the air conditioner defrosts, acquiring the temperature of a second evaporator coil of the indoor unit through an evaporator coil temperature sensor, and acquiring the outlet temperature of a second evaporator of the indoor unit through an evaporator outlet temperature sensor;
determining whether the second evaporator coil temperature is less than the second evaporator outlet temperature;
if the second evaporator coil temperature is lower than the second evaporator outlet temperature, taking the second evaporator coil temperature as the second evaporator temperature of the indoor unit;
and if the temperature of the second evaporator coil is greater than or equal to the outlet temperature of the second evaporator, taking the outlet temperature of the second evaporator as the temperature of the second evaporator of the indoor unit.
Further, the processor 1001 may be configured to call a defrosting control program stored in the memory 1005, and further perform the following operations:
when the air conditioner defrosts, acquiring a plurality of evaporator coil temperatures through a plurality of evaporator coil temperature sensors, and acquiring a plurality of evaporator outlet temperatures through a plurality of evaporator outlet temperature sensors;
carrying out average operation on the temperatures of the plurality of evaporator coils, and taking the obtained average value as the temperature of a second evaporator coil of an indoor unit in the air conditioner;
and carrying out average operation on the outlet temperatures of the plurality of evaporators, and taking the obtained average value as the outlet temperature of the second evaporator of the indoor unit.
Further, the processor 1001 may be configured to call a defrosting control program stored in the memory 1005, and further perform the following operations:
when a four-way valve control signal is received, judging whether the four-way valve control signal is a heating control signal or not;
if the four-way valve control signal is the heating control signal, controlling the air conditioner to enter a heating running mode;
and when the air conditioner is in a heating operation mode, controlling the opening degree of an electronic expansion valve of an indoor unit in the air conditioner to be a preset fixed opening degree.
Based on the hardware structure, various embodiments of the defrosting control method are provided.
The invention provides a defrosting control method.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the defrosting control method according to the present invention.
In this embodiment, the defrosting control method includes:
step S10, when the air conditioner is in a heating operation mode, acquiring the temperature of a first evaporator of an indoor unit in the air conditioner, and acquiring the indoor environment temperature;
in the embodiment, when the air conditioner is in the heating operation mode, the first evaporator temperature of the indoor unit in the air conditioner is obtained, and the indoor environment temperature is obtained. The air conditioner can be provided with an operation detection module, and the operation mode of the air conditioner can be detected through the operation detection module; the air conditioner can also be provided with a temperature detection module, and the temperature of the first evaporator of the indoor unit in the air conditioner and the indoor environment temperature can be respectively obtained through the temperature detection module.
It should be noted that the operation detection module may determine the operation mode of the air conditioner according to the current state of the four-way valve, for example, when the current state of the four-way valve is on, it may be determined that the air conditioner is in the heating operation mode, and when the current state of the four-way valve is off, it may be determined that the air conditioner is in the cooling operation mode. It can be understood that, in this embodiment, the operation detection module may also determine the operation mode of the air conditioner according to other manners, and is not limited to the manner of determining the operation mode of the air conditioner according to the current state of the four-way valve, which is not described herein in detail.
Specifically, when the air conditioner starts, the air conditioner triggers the operation detection module, when the operation detection module detects that the air conditioner is in a heating operation mode, the air conditioner starts the temperature detection module, the temperature detection module detects through the evaporator temperature sensor to obtain the first evaporator temperature, and meanwhile, the indoor environment temperature is detected through the indoor environment temperature sensor to obtain the indoor environment temperature. It should be noted that the indoor ambient temperature sensor is usually disposed on the indoor heat exchanger, and it is understood that, in this embodiment, the sensor may also be disposed in other areas, which is not limited herein. And the evaporator temperature sensor can be arranged on an evaporator coil, a branch inlet or a branch outlet of the indoor unit. The specific implementation process is as the second embodiment described below, and is not described herein.
Step S20, adding the indoor environment temperature and a preset fluctuation value, and taking the obtained value as a defrosting starting threshold value;
and after the indoor environment temperature is obtained, adding the indoor environment temperature and a preset fluctuation value, and taking the obtained value as a defrosting starting threshold value. It is understood that the defrosting turn-on threshold is a critical value for the air conditioner to enter the defrosting mode, which is defined according to a frost point at which the evaporator is frosted.
It should be noted that the frost point of the evaporator is related to the indoor ambient temperature, and the frost point of the evaporator has fluctuation in different atmospheric pressure environments, so the present embodiment presets a preset fluctuation value to satisfy various environments.
The preset fluctuation value can be obtained according to a large number of experiments, specifically, the frosting moment of the evaporator is observed under different environments and different indoor temperatures, the evaporator temperature at the frosting moment is detected, then subtraction operation is carried out on the evaporator temperature and the indoor environment temperature, and the obtained value is used as the preset fluctuation value. In the present embodiment, the preset fluctuation value is generally 2 to 10 degrees celsius.
Step S30, judging whether the first evaporator temperature is less than the defrosting starting threshold value;
and step S40, if the temperature of the first evaporator is less than the defrosting opening threshold, controlling the air conditioner to enter a defrosting mode, and controlling the opening of an electronic expansion valve in the indoor unit to be a preset defrosting opening.
In this embodiment, it is determined whether the temperature of the first evaporator is less than a defrosting opening threshold, and if the temperature of the first evaporator is less than the defrosting opening threshold, the air conditioner is controlled to enter a defrosting mode, and the opening of the electronic expansion valve in the indoor unit is controlled to be a preset defrosting opening. The preset defrosting opening is determined according to parameters such as the temperature of the evaporator, the running time of the compressor and the like, and in the embodiment, the preset defrosting opening is 150 to 350 steps.
It should be noted that specific defrosting modes include a compressor on mode, a four-way valve off mode (a cooling operation mode), an outdoor fan off mode, and the like, and it can be understood that, during defrosting, in order to prevent cold air blown out by the indoor unit from affecting the user experience, the indoor fan can be turned off.
In addition, it should be noted that when the air conditioner enters the defrosting mode, the compressor is turned on, which may cause a large pressure difference in the air conditioner system, and may cause a liquid return of a refrigerant in the air conditioner system, resulting in a damage to the compressor. Meanwhile, the outdoor fan reduces the air speed, which causes large system pressure difference and also can cause the liquid return of the refrigerant in the air conditioning system, thereby causing the damage of the compressor. Therefore, in the embodiment, the opening degree of the electronic expansion valve is reduced, that is, the indoor unit of the air conditioner is controlled to enter the throttling state, so that the system pressure difference is reduced, thereby preventing the refrigerant in the system from returning liquid and ensuring the normal operation of the compressor.
The embodiment of the invention provides a defrosting control method, which comprises the steps of acquiring the temperature of a first evaporator of an indoor unit in an air conditioner when the air conditioner is in a heating operation mode, and acquiring the temperature of indoor environment; adding the indoor environment temperature and a preset fluctuation value, and taking the obtained value as a defrosting starting threshold value; judging whether the temperature of the first evaporator is less than a defrosting starting threshold value or not; and if the temperature of the first evaporator is less than the defrosting opening threshold value, controlling the air conditioner to enter a defrosting mode, and controlling the opening degree of an electronic expansion valve in the indoor unit to be a preset defrosting opening degree. According to the embodiment of the invention, when the air conditioner is in a heating operation mode, the temperature of an evaporator of an indoor unit in the air conditioner is compared with the temperature of an indoor environment, then the air conditioner is controlled to defrost according to the comparison result, the outdoor unit is not required to inform the indoor unit of defrosting, so that defrosting control can be realized when the outdoor unit and the indoor unit are in a non-communication state, finally, when the air conditioner enters a defrosting mode, the opening degree of an electronic expansion valve in the indoor unit is controlled to be a preset defrosting opening degree, the indoor unit is switched to a throttling state, so that liquid return of an air conditioning system is prevented, and the compressor is prevented from being damaged.
Further, based on the above-described first embodiment, a second embodiment of the defrosting control method of the present invention is proposed.
In this embodiment, the step S10 includes:
a11, when the air conditioner is in a heating operation mode, acquiring a first evaporator coil temperature of an indoor unit in the air conditioner through an evaporator coil temperature sensor, and acquiring a first evaporator outlet temperature of the indoor unit through an evaporator outlet temperature sensor;
in the present embodiment, when the air conditioner is in the heating operation mode, the first evaporator coil temperature of the indoor unit in the air conditioner is acquired by the evaporator coil temperature sensor, and the first evaporator outlet temperature of the indoor unit is acquired by the evaporator outlet temperature sensor. Wherein, the temperature of the first evaporator coil is the temperature on the evaporator coil of the indoor unit of the air conditioner; the outlet temperature of the first evaporator is the temperature at the branch outlet of the evaporator of the indoor unit of the air conditioner.
It should be noted that the evaporator coil temperature sensor is arranged on the evaporator coil of the air conditioner indoor unit, and the evaporator outlet temperature sensor is arranged on the outlet of the branch of the evaporator of the air conditioner indoor unit. Of course, the evaporator coil temperature sensor may comprise one or more and the evaporator outlet temperature sensor may comprise one or more, and is not particularly limited herein.
Specifically, step a11 includes:
step a111, when the air conditioner is in a heating operation mode, acquiring a plurality of evaporator coil temperatures through a plurality of evaporator coil temperature sensors, and acquiring a plurality of evaporator outlet temperatures through a plurality of evaporator outlet temperature sensors;
in this embodiment, when the air conditioner is in the heating operation mode, a plurality of evaporator coil temperatures are acquired by a plurality of evaporator coil temperature sensors, and a plurality of evaporator outlet temperatures are acquired by a plurality of evaporator outlet temperature sensors. It will be appreciated that the more evaporator coil temperature sensors that are sensed, the more accurate the resulting evaporator coil temperature, and the more evaporator outlet temperatures that are sensed, the more accurate the resulting evaporator outlet temperature.
Step a112, carrying out average operation on the temperatures of the plurality of evaporator coils, and taking the obtained average value as the temperature of a first evaporator coil of an indoor unit in the air conditioner;
then, the temperatures of the plurality of evaporator coils are averaged, and the obtained average value is used as the temperature of the first evaporator coil of the indoor unit in the air conditioner. It will be appreciated that the multiple evaporator coil temperatures are typically not very different, and therefore averaging the multiple evaporator coil temperatures results in a more accurate evaporator coil temperature. Of course, it can also be obtained by a mathematical method such as median and mode.
And a113, performing average operation on the outlet temperatures of the plurality of evaporators, and taking the obtained average value as the outlet temperature of the first evaporator of the indoor unit.
Then, the outlet temperatures of the plurality of evaporators are averaged, and the obtained average value is used as the outlet temperature of the first evaporator of the indoor unit. It can be understood that the outlet temperatures of the plurality of evaporators are usually not very different, and therefore, the outlet temperatures of the plurality of evaporators are averaged to obtain more accurate outlet temperatures of the evaporators. Of course, it can also be obtained by a mathematical method such as median and mode.
Step a12, determining if the first evaporator coil temperature is greater than the first evaporator outlet temperature;
a13, if the first evaporator coil temperature is higher than the first evaporator outlet temperature, taking the first evaporator coil temperature as the first evaporator temperature of the indoor unit, and obtaining the indoor environment temperature through an indoor environment temperature sensor;
in this embodiment, it is determined whether the first evaporator coil temperature is greater than the first evaporator outlet temperature, and if the first evaporator coil temperature is greater than the first evaporator outlet temperature, the first evaporator coil temperature is taken as the first evaporator temperature of the indoor unit, and the indoor ambient temperature is obtained by the indoor ambient temperature sensor. Wherein, the indoor environment temperature sensor is arranged in the indoor unit of the air conditioner.
It can be understood that if the first evaporator coil temperature is greater than the first evaporator outlet temperature, the first evaporator coil temperature is directly used as the first evaporator temperature, and in the subsequent determination process, that is, when it is determined whether the first evaporator temperature is less than the defrosting opening threshold, it is equivalent to determining whether both the first evaporator coil temperature and the first evaporator outlet temperature are less than the defrosting opening threshold.
Step a14, if the first evaporator coil temperature is less than or equal to the first evaporator outlet temperature, taking the first evaporator outlet temperature as the first evaporator temperature of the indoor unit, and obtaining the indoor environment temperature through an indoor environment temperature sensor.
In this embodiment, it is determined whether the first evaporator coil temperature is greater than the first evaporator outlet temperature, and if the first evaporator coil temperature is less than or equal to the first evaporator outlet temperature, the first evaporator outlet temperature is taken as the first evaporator temperature of the indoor unit, and the indoor ambient temperature is obtained by the indoor ambient temperature sensor. Wherein, the indoor environment temperature sensor is arranged in the indoor unit of the air conditioner.
It can be understood that if the first evaporator coil temperature is less than or equal to the first evaporator outlet temperature, directly taking the first evaporator outlet temperature as the first evaporator temperature, and in the subsequent determining process, that is, when determining whether the first evaporator temperature is less than the defrosting activation threshold, it is equivalent to determining whether the first evaporator coil temperature and the first evaporator outlet temperature are both less than the defrosting activation threshold.
In the embodiment, the temperature of the evaporator coil and the temperature of the outlet of the evaporator are comprehensively considered, the temperature of the evaporator is determined, and the accuracy of the temperature detection of the evaporator is further improved, so that the air conditioner can enter a defrosting mode in time.
Further, based on the above-described first embodiment, a third embodiment of the defrosting control method of the present invention is proposed.
Referring to fig. 3, fig. 3 is a flow chart illustrating a defrosting control method according to a third embodiment of the present invention.
In this embodiment, the defrosting control method of the present invention further includes:
step S50, when the air conditioner defrosts, acquiring the temperature of a second evaporator of the indoor unit;
in this embodiment, the second evaporator temperature of the indoor unit is acquired when the air conditioner is defrosted. Specifically, when the air conditioner defrosts, the air conditioner starts the temperature detection module, and the temperature detection module detects the temperature through the evaporator temperature sensor to obtain the temperature of the second evaporator. The evaporator temperature sensor can be arranged on an evaporator coil of the indoor unit, a branch inlet or a branch outlet.
It should be noted that the second evaporator temperature is used to determine whether the air conditioner exits the defrosting mode, and the first evaporator temperature is different from the first evaporator temperature, and is used to determine whether the air conditioner enters the defrosting mode.
Specifically, step S50 includes:
a51, when the air conditioner defrosts, acquiring a second evaporator coil temperature of the indoor unit through an evaporator coil temperature sensor, and acquiring a second evaporator outlet temperature of the indoor unit through an evaporator outlet temperature sensor;
in the present embodiment, when the air conditioner defrosts, the second evaporator coil temperature of the indoor unit is acquired by the evaporator coil temperature sensor, and the second evaporator outlet temperature of the indoor unit is acquired by the evaporator outlet temperature sensor. Wherein, the temperature of the second evaporator coil is the temperature on the evaporator coil of the indoor unit of the air conditioner; the outlet temperature of the second evaporator is the temperature at the branch outlet of the evaporator of the indoor unit of the air conditioner.
It should be noted that the evaporator coil temperature sensor is arranged on the evaporator coil of the air conditioner indoor unit, and the evaporator outlet temperature sensor is arranged on the outlet of the branch of the evaporator of the air conditioner indoor unit. Of course, the evaporator coil temperature sensor may comprise one or more and the evaporator outlet temperature sensor may comprise one or more, and is not particularly limited herein.
Specifically, step a51 includes:
step a511, when the air conditioner defrosts, acquiring a plurality of evaporator coil temperatures through a plurality of evaporator coil temperature sensors, and acquiring a plurality of evaporator outlet temperatures through a plurality of evaporator outlet temperature sensors;
in the present embodiment, when the air conditioner defrosts, a plurality of evaporator coil temperatures are acquired by a plurality of evaporator coil temperature sensors, and a plurality of evaporator outlet temperatures are acquired by a plurality of evaporator outlet temperature sensors. It will be appreciated that the more evaporator coil temperature sensors that are sensed, the more accurate the resulting evaporator coil temperature, and the more evaporator outlet temperatures that are sensed, the more accurate the resulting evaporator outlet temperature.
Step a512, carrying out average operation on the temperatures of the plurality of evaporator coils, and taking the obtained average value as the temperature of a second evaporator coil of an indoor unit in the air conditioner;
then, the temperatures of the plurality of evaporator coils are averaged, and the obtained average value is used as the temperature of a second evaporator coil of the indoor unit in the air conditioner. It will be appreciated that the multiple evaporator coil temperatures are typically not very different, and therefore averaging the multiple evaporator coil temperatures results in a more accurate evaporator coil temperature. Of course, it can also be obtained by a mathematical method such as median and mode.
Step a513, performing an average operation on the outlet temperatures of the plurality of evaporators, and taking an obtained average value as the outlet temperature of the second evaporator of the indoor unit.
Then, the outlet temperatures of the plurality of evaporators are averaged, and the obtained average value is used as the outlet temperature of the second evaporator of the indoor unit. It can be understood that the outlet temperatures of the plurality of evaporators are usually not very different, and therefore, the outlet temperatures of the plurality of evaporators are averaged to obtain more accurate outlet temperatures of the evaporators. Of course, it can also be obtained by a mathematical method such as median and mode.
Step a52, determining if the second evaporator coil temperature is less than the second evaporator outlet temperature;
a step 53, if the second evaporator coil temperature is less than the second evaporator outlet temperature, taking the second evaporator coil temperature as the second evaporator temperature of the indoor unit;
in this embodiment, it is determined whether the second evaporator coil temperature is lower than the second evaporator outlet temperature, and if the second evaporator coil temperature is lower than the second evaporator outlet temperature, the second evaporator coil temperature is set as the second evaporator temperature of the indoor unit.
It can be understood that if the second evaporator coil temperature is lower than the second evaporator outlet temperature, the second evaporator coil temperature is directly used as the second evaporator temperature, and in the subsequent determination process, it is determined whether the second evaporator temperature is greater than or equal to the preset defrosting exit threshold, which is equivalent to determining whether the second evaporator coil temperature and the second evaporator outlet temperature are both greater than or equal to the defrosting start threshold.
Step a54, if the second evaporator coil temperature is greater than or equal to the second evaporator outlet temperature, taking the second evaporator outlet temperature as the second evaporator temperature of the indoor unit.
In this embodiment, it is determined whether the second evaporator coil temperature is less than the second evaporator outlet temperature, and if the second evaporator coil temperature is greater than or equal to the second evaporator outlet temperature, the second evaporator outlet temperature is taken as the second evaporator temperature of the indoor unit.
It can be understood that if the second evaporator coil temperature is greater than or equal to the second evaporator outlet temperature, the second evaporator outlet temperature is directly used as the second evaporator temperature, and in the subsequent determination process, it is determined whether the second evaporator temperature is greater than or equal to the preset defrosting exit threshold, which is equivalent to determining whether the second evaporator coil temperature and the second evaporator outlet temperature are both greater than or equal to the defrosting start threshold.
In the embodiment, the temperature of the evaporator coil and the temperature of the outlet of the evaporator are comprehensively considered, so that the accuracy of the temperature detection of the evaporator is further improved, and the air conditioner is ensured to exit the defrosting mode in time.
Step S60, judging whether the second evaporator temperature is greater than or equal to a preset defrosting exit threshold value;
and step S70, if the temperature of the second evaporator is greater than or equal to the preset defrosting exit threshold, controlling the air conditioner to exit the defrosting mode, and controlling the opening degree of the electronic expansion valve to be a preset fixed opening degree.
In this embodiment, it is determined whether the temperature of the second evaporator is greater than or equal to a preset defrosting exit threshold, and if the temperature of the second evaporator is greater than or equal to the preset defrosting exit threshold, the air conditioner is controlled to exit the defrosting mode, and the opening of the electronic expansion valve is controlled to be a preset fixed opening. The preset fixed opening is set according to actual conditions, such as 480 steps, 470 steps, 460 steps, and the like, and is not limited in detail here. It is understood that the preset fixed opening degree is a maximum opening degree of the electronic expansion valve or close to the maximum opening degree of the electronic expansion valve.
When frost on the evaporator of the indoor unit melts, the evaporator temperature is detected, and the evaporator temperature is a preset defrosting exit threshold. It is understood that the preset defrosting exit threshold value is different in different environments, and is usually 25 to 40 degrees celsius.
In addition, it should be noted that specific modes for exiting the defrosting mode include a compressor, a four-way valve opening (heating operation mode), an outdoor fan opening, and the like, and of course, the indoor fan may be turned on to improve the indoor heating effect. It can be understood that in the defrosting process of the air conditioner, if a fault, a shutdown or a mode switching occurs, the air conditioner is immediately controlled to exit the defrosting mode.
In this embodiment, after controlling the air conditioner to enter the defrosting mode, the evaporator temperature of the indoor unit in the air conditioner is compared with a preset defrosting exit threshold, and then, according to the comparison result, the air conditioner is controlled to exit the defrosting mode, and meanwhile, the opening degree of the electronic expansion valve of the indoor unit is controlled to be a preset fixed opening degree, so as to ensure that the air conditioner timely exits the defrosting mode after defrosting is completed, thereby recovering the original heating operation mode and ensuring continuous indoor heating.
Further, based on the above-described first embodiment, a fourth embodiment of the defrosting control method of the present invention is proposed.
Referring to fig. 4, fig. 4 is a schematic flow chart of a defrosting control method according to a fourth embodiment of the present invention.
In this embodiment, before the step S10, the defrosting control method of the present invention further includes:
step S80, when receiving the four-way valve control signal, judging whether the four-way valve control signal is a heating control signal;
in this embodiment, when receiving a four-way valve control signal, it is determined whether the four-way valve control signal is a heating control signal. The four-way valve control signal can control the four-way valve to be opened or closed, and when the four-way valve control signal controls the four-way valve to be opened, the four-way valve control signal is a heating control signal; when the four-way valve is controlled to be closed by the four-way valve control signal, the four-way valve control signal is a refrigeration control signal.
Step S90, if the four-way valve control signal is the heating control signal, controlling the air conditioner to enter a heating running mode;
in this embodiment, if the four-way valve control signal is a heating control signal, the air conditioner is controlled to enter a heating operation mode. When the air conditioner enters a heating operation mode, the outdoor unit enters a throttling state, the opening degree of the electronic expansion valve of the indoor unit is a preset fixed opening degree, and the electronic expansion valve can also be in a full-open state.
And S100, controlling the opening degree of an electronic expansion valve of an indoor unit in the air conditioner to be a preset fixed opening degree when the air conditioner is in a heating operation mode.
And then, when the air conditioner is in a heating operation mode, controlling the opening degree of an electronic expansion valve of an indoor unit in the air conditioner to be a preset fixed opening degree. The preset fixed opening is set according to actual conditions, such as 480 steps, 470 steps, 460 steps, and the like, and is not limited in detail here. It is understood that the preset fixed opening degree is a maximum opening degree of the electronic expansion valve or close to the maximum opening degree of the electronic expansion valve.
In this embodiment, before the air conditioner is controlled to enter the defrosting mode, the air conditioner is controlled to enter the heating operation mode, and the opening of the electronic expansion valve of the indoor unit is controlled to be a preset fixed opening, so as to ensure that the outdoor unit of the air conditioner is in a throttling state and the indoor unit is in a non-throttling state.
The present invention also provides an air conditioner, comprising: the defrosting control method comprises a memory, a processor and a defrosting control program stored on the memory and capable of running on the processor, wherein the defrosting control program realizes the steps of the defrosting control method according to any one of the above embodiments when being executed by the processor.
Further, the air conditioner is provided with an evaporator coil temperature sensor and an evaporator outlet temperature sensor which are connected with the processor, wherein the evaporator coil temperature sensor is arranged on a coil of an evaporator of an indoor unit in the air conditioner, and the evaporator outlet temperature sensor is arranged on a branch outlet of the evaporator.
The specific embodiment of the air conditioner of the present invention is basically the same as the embodiments of the defrosting control method described above, and will not be described herein again.
The present invention also provides a computer-readable storage medium having a defrosting control program stored thereon, which when executed by a processor implements the steps of the defrosting control method according to any one of the above embodiments.
The specific embodiment of the computer-readable storage medium of the present invention is substantially the same as the embodiments of the defrosting control method described above, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A defrosting control method is characterized by comprising the following steps:
when the air conditioner is in a heating operation mode, acquiring the temperature of a first evaporator of an indoor unit in the air conditioner, and acquiring the temperature of indoor environment;
adding the indoor environment temperature and a preset fluctuation value, and taking the obtained value as a defrosting starting threshold value;
judging whether the first evaporator temperature is less than the defrosting starting threshold value or not;
and if the temperature of the first evaporator is less than the defrosting opening threshold value, controlling the air conditioner to enter a defrosting mode, and controlling the opening degree of an electronic expansion valve in the indoor unit to be a preset defrosting opening degree.
2. The defrosting control method of claim 1, wherein the step of obtaining the first evaporator temperature of an indoor unit of the air conditioner and obtaining the indoor ambient temperature when the air conditioner is in a heating operation mode comprises:
when the air conditioner is in a heating operation mode, acquiring a first evaporator coil temperature of an indoor unit in the air conditioner through an evaporator coil temperature sensor, and acquiring a first evaporator outlet temperature of the indoor unit through an evaporator outlet temperature sensor;
determining whether the first evaporator coil temperature is greater than the first evaporator outlet temperature;
if the temperature of the first evaporator coil is higher than the outlet temperature of the first evaporator, taking the temperature of the first evaporator coil as the temperature of the first evaporator of the indoor unit, and acquiring the indoor environment temperature through an indoor environment temperature sensor;
and if the temperature of the first evaporator coil is less than or equal to the outlet temperature of the first evaporator, taking the outlet temperature of the first evaporator as the temperature of the first evaporator of the indoor unit, and acquiring the indoor environment temperature through an indoor environment temperature sensor.
3. The defrosting control method of claim 2, wherein the step of obtaining a first evaporator coil temperature of an indoor unit of the air conditioner through an evaporator coil temperature sensor and obtaining a first evaporator outlet temperature of the indoor unit through an evaporator outlet temperature sensor when the air conditioner is in a heating operation mode comprises:
when the air conditioner is in a heating operation mode, acquiring a plurality of evaporator coil temperatures through a plurality of evaporator coil temperature sensors, and acquiring a plurality of evaporator outlet temperatures through a plurality of evaporator outlet temperature sensors;
carrying out average operation on the temperatures of the plurality of evaporator coils, and taking the obtained average value as the temperature of a first evaporator coil of an indoor unit in the air conditioner;
and carrying out average operation on the outlet temperatures of the plurality of evaporators, and taking the obtained average value as the outlet temperature of the first evaporator of the indoor unit.
4. The defrosting control method according to claim 1, further comprising:
when the air conditioner is defrosted, acquiring the temperature of a second evaporator of the indoor unit;
judging whether the second evaporator temperature is greater than or equal to a preset defrosting exit threshold value or not;
and if the temperature of the second evaporator is greater than or equal to the preset defrosting exit threshold, controlling the air conditioner to exit the defrosting mode, and controlling the opening degree of the electronic expansion valve to be a preset fixed opening degree.
5. The defrosting control method of claim 4, wherein the step of acquiring the second evaporator temperature of the indoor unit while the air conditioner is defrosting comprises:
when the air conditioner defrosts, acquiring the temperature of a second evaporator coil of the indoor unit through an evaporator coil temperature sensor, and acquiring the outlet temperature of a second evaporator of the indoor unit through an evaporator outlet temperature sensor;
determining whether the second evaporator coil temperature is less than the second evaporator outlet temperature;
if the second evaporator coil temperature is lower than the second evaporator outlet temperature, taking the second evaporator coil temperature as the second evaporator temperature of the indoor unit;
and if the temperature of the second evaporator coil is greater than or equal to the outlet temperature of the second evaporator, taking the outlet temperature of the second evaporator as the temperature of the second evaporator of the indoor unit.
6. The defrosting control method of claim 5, wherein the step of obtaining the second evaporator coil temperature of the indoor unit by an evaporator coil temperature sensor and obtaining the second evaporator outlet temperature of the indoor unit by an evaporator outlet temperature sensor while the air conditioner is defrosting comprises:
when the air conditioner defrosts, acquiring a plurality of evaporator coil temperatures through a plurality of evaporator coil temperature sensors, and acquiring a plurality of evaporator outlet temperatures through a plurality of evaporator outlet temperature sensors;
carrying out average operation on the temperatures of the plurality of evaporator coils, and taking the obtained average value as the temperature of a second evaporator coil of an indoor unit in the air conditioner;
and carrying out average operation on the outlet temperatures of the plurality of evaporators, and taking the obtained average value as the outlet temperature of the second evaporator of the indoor unit.
7. The defrosting control method according to any one of claims 1 to 6, wherein before the step of obtaining the first evaporator temperature of the indoor unit of the air conditioner and obtaining the indoor ambient temperature when the air conditioner is in the heating operation mode, the method further comprises:
when a four-way valve control signal is received, judging whether the four-way valve control signal is a heating control signal or not;
if the four-way valve control signal is the heating control signal, controlling the air conditioner to enter a heating running mode;
and when the air conditioner is in a heating operation mode, controlling the opening degree of an electronic expansion valve of an indoor unit in the air conditioner to be a preset fixed opening degree.
8. An air conditioner, characterized in that the air conditioner comprises: a memory, a processor, and a defrosting control program stored on the memory and executable on the processor, the defrosting control program when executed by the processor implementing the steps of the defrosting control method according to any one of claims 1 to 7.
9. The air conditioner according to claim 8, wherein the air conditioner is provided with an evaporator coil temperature sensor and an evaporator outlet temperature sensor connected to the processor, wherein the evaporator coil temperature sensor is provided on a coil of an evaporator of an indoor unit in the air conditioner, and the evaporator outlet temperature sensor is provided on a branch outlet of the evaporator.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a defrosting control program that, when executed by a processor, implements the steps of the defrosting control method according to any one of claims 1 to 7.
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| CN202010892589.6A CN114110928A (en) | 2020-08-28 | 2020-08-28 | Defrosting control method, air conditioner and computer readable storage medium |
| PCT/CN2020/141922 WO2022041626A1 (en) | 2020-08-28 | 2020-12-31 | Defrosting control method, air conditioner, and computer readable storage medium |
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| CN202010892589.6A CN114110928A (en) | 2020-08-28 | 2020-08-28 | Defrosting control method, air conditioner and computer readable storage medium |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09203570A (en) * | 1996-01-26 | 1997-08-05 | Sanden Corp | Defrosting controller for cooler |
| CN104236186A (en) * | 2014-09-30 | 2014-12-24 | 宁波奥克斯电气有限公司 | Defrosting control method for heat pump multi-connected air conditioning unit |
| CN105444344A (en) * | 2015-11-09 | 2016-03-30 | 广东美的制冷设备有限公司 | Defrosting control method of air conditioner, defrosting control device of air conditioner and air conditioner |
| CN106091260A (en) * | 2016-06-17 | 2016-11-09 | 美的集团武汉制冷设备有限公司 | Air-conditioner and defrosting control method thereof |
| CN106524557A (en) * | 2016-11-07 | 2017-03-22 | 广东美的暖通设备有限公司 | Multi-couple unit system and anti-liquid-return control method during defrosting of multi-couple unit system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256766B (en) * | 2013-05-03 | 2015-06-03 | 广东美的制冷设备有限公司 | Method for controlling intelligent defrosting of air conditioner |
| US10591173B2 (en) * | 2015-02-13 | 2020-03-17 | Trane International Inc. | Defrost learning algorithm based on time of defrost state operation |
| CN104913452B (en) * | 2015-06-03 | 2017-11-10 | 广东美的制冷设备有限公司 | Air conditioner and its defrosting control method |
| CN107152750B (en) * | 2017-04-18 | 2019-10-08 | 珠海格力电器股份有限公司 | Frosting control method and device |
| JP7058717B2 (en) * | 2018-03-07 | 2022-04-22 | 三菱電機株式会社 | Heat pump system |
| CN110631184A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN108917094A (en) * | 2018-07-18 | 2018-11-30 | 奥克斯空调股份有限公司 | A kind of defrosting control method, device and air conditioner |
-
2020
- 2020-08-28 CN CN202010892589.6A patent/CN114110928A/en active Pending
- 2020-12-31 WO PCT/CN2020/141922 patent/WO2022041626A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09203570A (en) * | 1996-01-26 | 1997-08-05 | Sanden Corp | Defrosting controller for cooler |
| CN104236186A (en) * | 2014-09-30 | 2014-12-24 | 宁波奥克斯电气有限公司 | Defrosting control method for heat pump multi-connected air conditioning unit |
| CN105444344A (en) * | 2015-11-09 | 2016-03-30 | 广东美的制冷设备有限公司 | Defrosting control method of air conditioner, defrosting control device of air conditioner and air conditioner |
| CN106091260A (en) * | 2016-06-17 | 2016-11-09 | 美的集团武汉制冷设备有限公司 | Air-conditioner and defrosting control method thereof |
| CN106524557A (en) * | 2016-11-07 | 2017-03-22 | 广东美的暖通设备有限公司 | Multi-couple unit system and anti-liquid-return control method during defrosting of multi-couple unit system |
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Application publication date: 20220301 |