CN114688630A - Air conditioner, control method and device thereof and readable storage medium - Google Patents
Air conditioner, control method and device thereof and readable storage medium Download PDFInfo
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- CN114688630A CN114688630A CN202011621728.8A CN202011621728A CN114688630A CN 114688630 A CN114688630 A CN 114688630A CN 202011621728 A CN202011621728 A CN 202011621728A CN 114688630 A CN114688630 A CN 114688630A
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- 238000000034 method Methods 0.000 title claims abstract description 70
- 238000010257 thawing Methods 0.000 claims abstract description 74
- 230000008859 change Effects 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000005057 refrigeration Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 230000001276 controlling effect Effects 0.000 description 31
- 239000003507 refrigerant Substances 0.000 description 17
- 238000012546 transfer Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
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- 230000004044 response Effects 0.000 description 1
- 230000001360 synchronised effect Effects 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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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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
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
-
- 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
- F24F2110/12—Temperature of the outside air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps: responding to a defrosting instruction, and controlling the air conditioner to perform defrosting operation; opening the fresh air inlet, and controlling the indoor fan to be opened; when the indoor fan is started, outdoor air enters the air duct from the fresh air inlet to exchange heat with the indoor heat exchanger. The invention also discloses a control device of the air conditioner, the air conditioner and a computer readable storage medium. The invention aims to improve the defrosting effect of an outdoor unit.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a method and apparatus for controlling an air conditioner, and a computer-readable storage medium.
Background
With the development of economic technology, the application of air conditioners is more and more extensive, and most of the air conditioners have a heating function besides a refrigerating function. When the air conditioner operates in a low-temperature environment, the normal heating of the air conditioner can be ensured only by defrosting the outdoor unit.
However, the conventional air conditioner generally performs defrosting through cooling operation, and an indoor fan generally needs to be stopped in a defrosting process, so that the heat exchange of an indoor evaporator is stopped to cause the return air temperature of a system to be too low, the heat exchange output capacity of the system is reduced, and the defrosting effect of an outdoor unit is affected.
Disclosure of Invention
The invention mainly aims to provide a control method of an air conditioner, aiming at improving the defrosting effect of an outdoor unit.
In order to achieve the above object, the present invention provides a method for controlling an air conditioner, the air conditioner includes a housing, an indoor heat exchanger and an indoor fan, the housing is provided with a fresh air inlet, an air duct is arranged in the housing, the fresh air inlet is communicated with the air duct, the indoor heat exchanger and the indoor fan are both arranged in the air duct, the method for controlling the air conditioner includes the following steps:
responding to a defrosting instruction, and controlling the air conditioner to perform defrosting operation;
opening the fresh air inlet, and controlling the indoor fan to be opened;
when the indoor fan is started, outdoor air enters the air duct from the fresh air inlet to exchange heat with the indoor heat exchanger.
Optionally, before the step of opening the fresh air inlet and controlling the indoor fan to be opened, the method further includes:
acquiring the outdoor environment temperature and the indoor heat exchanger temperature in the defrosting operation process of the air conditioner;
determining a temperature difference value between the outdoor environment temperature and the indoor heat exchanger temperature;
and if the temperature of the indoor heat exchanger is lower than the outdoor environment temperature and the temperature difference value is greater than or equal to a set value, executing the step of opening the fresh air inlet and controlling the indoor fan to be opened.
Optionally, the step of controlling the indoor fan to be turned on includes:
determining a target rotating speed of the indoor fan according to the temperature difference value;
and controlling the indoor fan to operate according to the target rotating speed.
Optionally, the step of determining the target rotation speed of the indoor fan according to the temperature difference value includes:
acquiring temperature characteristic parameters of the outdoor heat exchanger;
acquiring a corresponding relation between the temperature difference and the rotating speed according to the temperature characteristic parameters of the outdoor heat exchanger;
and determining the target rotating speed of the indoor fan corresponding to the temperature difference value based on the corresponding relation between the temperature difference and the rotating speed.
Optionally, after the step of controlling the indoor fan to be turned on, the method further includes:
acquiring temperature change parameters of the outdoor heat exchanger; the temperature change parameter is a characteristic parameter of temperature change in the defrosting operation process of the air conditioner;
determining the operating parameters of the outdoor fan according to the temperature change parameters;
and controlling the outdoor fan to operate according to the operation parameters.
Optionally, the step of acquiring a temperature variation parameter of an outdoor heat exchanger of the air conditioner includes:
acquiring a first temperature and a second temperature of an outdoor heat exchanger; the first temperature is detected when the air conditioner starts a refrigeration state for defrosting, and the second temperature is currently detected;
determining a temperature difference between the second temperature and the first temperature as the temperature change parameter.
Optionally, the step of determining the operation parameter of the outdoor fan according to the temperature variation parameter includes:
if the temperature difference is smaller than a set threshold value, determining the operation parameter as the outdoor fan is turned off;
and if the temperature difference is greater than or equal to a set threshold value, determining the operation parameter as starting the outdoor fan.
Optionally, the turning on the outdoor fan comprises controlling the outdoor fan to set a steering operation;
the outdoor heat exchanger comprises an inner side and an outer side, the distance between the outer side of the outdoor heat exchanger and the outdoor air outlet of the air conditioner is smaller than the distance between the inner side of the outdoor heat exchanger and the outdoor air outlet of the air conditioner, and the outdoor fan blows air to the outer side from the inner side in the set turning direction during operation.
Optionally, the step of controlling the defrosting operation of the air conditioner includes:
and controlling an electronic expansion valve of the air conditioner to operate at an opening degree larger than a set opening degree threshold value.
Optionally, after the step of controlling the electronic expansion valve of the air conditioner to operate at an opening degree greater than a set opening degree threshold, the method further includes:
setting time interval to obtain the temperature of an outdoor heat exchanger of the air conditioner;
and controlling the electronic expansion valve to reduce the opening degree according to the temperature of the outdoor heat exchanger.
Optionally, the casing still is equipped with indoor air outlet, before the step of control indoor fan is opened, still include:
and closing the indoor air outlet.
Optionally, the casing is further provided with a water outlet communicated with the outside, the water outlet is used for discharging condensed water generated in the casing to the outside, and before the step of controlling the indoor fan to be turned on, the method further includes:
closing the indoor air outlet and opening the water outlet;
when the indoor fan is started, fresh air after heat exchange is discharged outdoors from the water outlet.
In order to achieve the above object, the present application also provides a control device of an air conditioner, including: the control method comprises the steps of realizing the control method of the air conditioner according to any one of the above items when the control program of the air conditioner is executed by the processor.
Further, in order to achieve the above object, the present application also proposes an air conditioner including:
the fresh air inlet is formed in the shell, an air channel is formed in the shell, and the fresh air inlet is communicated with the air channel;
the indoor heat exchanger is arranged in the air duct;
the indoor fan is arranged in the air duct; and
the control device of the air conditioner is characterized in that the indoor fan is connected with the control device.
Further, in order to achieve the above object, the present application also proposes a computer-readable storage medium having stored thereon a control program of an air conditioner, which when executed by a processor, implements the steps of the control method of the air conditioner as recited in any one of the above.
The invention provides a control method of an air conditioner, which comprises a shell, an indoor heat exchanger and an indoor fan, wherein the shell is provided with a fresh air inlet communicated with an air channel in the shell, the indoor heat exchanger and the indoor fan are arranged in the air channel, and therefore, in the defrosting process of the air conditioner responding to a defrosting instruction, fresh air is introduced into the air conditioner to exchange heat with the indoor heat exchanger by opening the fresh air and controlling the indoor fan to be opened.
Drawings
FIG. 1 is a schematic diagram of an indoor side of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hardware configuration involved in the operation of an embodiment of a control device of an air conditioner;
FIG. 3 is a flowchart illustrating an embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 4 is a flow chart illustrating a control method of an air conditioner according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method of an air conditioner according to another 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.
The main solution of the embodiment of the invention is as follows: the air conditioner comprises a shell, an indoor heat exchanger and an indoor fan, wherein the shell is provided with a fresh air inlet, an air channel is arranged in the shell, the fresh air inlet is communicated with the air channel, the indoor heat exchanger and the indoor fan are both arranged in the air channel, and the control method of the air conditioner comprises the following steps: responding to a defrosting instruction, and controlling the air conditioner to perform defrosting operation; opening the fresh air inlet and controlling the indoor fan to be opened; when the indoor fan is started, outdoor air enters the air duct from the fresh air inlet to exchange heat with the indoor heat exchanger.
Because in the prior art, the air conditioner generally uses the refrigeration operation to defrost, generally needs the indoor fan to stop running in the defrosting process, however, the heat exchange of the indoor evaporator stops, which results in the return air temperature of the system being too low, reduces the heat exchange output capacity of the system, and affects the defrosting effect of the outdoor unit. .
The present invention provides the above solution, and aims to improve the defrosting effect of the outdoor unit.
The embodiment of the invention provides an air conditioner which can be an air conditioner comprising a main machine and a movable sub machine, and can also be a common floor type air conditioner, a wall-mounted air conditioner and the like.
In this embodiment, referring to fig. 1, the air conditioner includes a housing 10, a refrigerant circulation system and an indoor fan 1, wherein the refrigerant circulation system includes an indoor heat exchanger 2, an outdoor heat exchanger, a compressor 3, a four-way valve 4 and an electronic expansion valve 5 which are connected. Wherein, the four-way valve 4 can be used for switching the heating operation and the cooling operation of the air conditioner. The electronic expansion valve 5 is a throttling device which is arranged between the indoor heat exchanger 2 and the outdoor heat exchanger and has adjustable opening degree.
The casing 10 is equipped with new trend entry 11, indoor return air inlet 12, indoor air outlet 13 and new trend export 14, be equipped with the wind channel in the casing 10, new trend entry 11, indoor return air inlet 12, indoor air outlet 13 and new trend export 14 all communicate with the wind channel. The indoor air return port 12 and the indoor air outlet 13 are both communicated with the indoor environment, and the fresh air inlet 11 and the fresh air outlet 14 are both communicated with the outdoor environment. In the present embodiment, the casing 10 is specifically referred to as an outer casing of the indoor unit.
Wherein, indoor heat exchanger 2 and indoor fan 1 all locate in the wind channel. Indoor return air inlet 12 and new trend entry 11 locate the same one side of indoor heat exchanger 2, and indoor return air inlet 12 and new trend entry 11 all can carry out the heat transfer through indoor heat exchanger 2 to the air that enters into in the casing 10. The fresh air inlet 14 and the fresh air outlet 11 are respectively arranged at two sides of the indoor heat exchanger 2.
A fresh air regulating and controlling component can be arranged in the fresh air inlet 11 or a fresh air duct communicated with the outdoor environment through the fresh air inlet 11, the fresh air regulating and controlling component specifically comprises a fresh air control valve and/or a fresh air fan, the fresh air inlet 11 can be opened when the fresh air control valve is opened, and air in the outdoor environment can enter the shell 10 from the fresh air inlet 11; when the fresh air control valve is closed, the fresh air inlet 11 can be closed, and air in the outdoor environment cannot enter the shell 10 from the fresh air inlet 11. When the fresh air inlet 11 is opened, the fresh air fan can suck the air in the outdoor environment into the shell 10 at the beginning, and when the fresh air fan is closed, the air in the outdoor environment can be sucked into the shell 10 if the indoor fan 1 is opened; when the fresh air fan is turned off, if the indoor fan 1 is turned off, air in the outdoor environment is difficult to enter the casing 10.
The indoor air outlet 13 may be provided with an air outlet regulating component, and the air outlet regulating component may include an air deflector, which may be used to close or open the indoor air outlet 13. The broken line and the solid line in fig. 1 represent two states when the indoor air outlet 13 is closed and opened, respectively. Specifically, when the indoor air outlet 13 is opened and the indoor fan 1 is started, air in the indoor environment can enter the shell 10 from the indoor air return inlet 12 to exchange heat with the indoor heat exchanger 2, and the air after heat exchange can be sent into the indoor environment from the indoor air outlet 13.
Further, the air conditioner also comprises an outdoor fan 6 arranged corresponding to the outdoor heat exchanger, and air can be blown to the outdoor environment from the outdoor heat exchanger when the outdoor fan 6 is used for blowing.
Further, in this embodiment, the fresh air outlet 14 is specifically a water outlet of the casing, the water outlet is specifically communicated with a water receiving tray of the indoor heat exchanger 2, the water outlet is used for discharging condensed water generated in the casing 10 to the outside, the water outlet is specifically located on the air outlet side of the indoor fan 1, and when the indoor air outlet 13 is closed and the indoor fan 1 is opened, air in the casing 10 can be discharged to the outside from the water outlet.
Further, the air conditioner may further include a temperature detection module 7 for detecting temperature data related to air conditioner control. Specifically, the temperature detection module 7 can be arranged at the positions of the outdoor heat exchanger, the indoor heat exchanger 2, the outdoor environment, the indoor air return opening 12 and the like according to actual requirements, so as to be used for detecting temperature parameters such as the temperature of the heat exchanger, the temperature of the outdoor environment, the temperature of the indoor environment and the like.
The embodiment of the invention provides a control device of an air conditioner, which can be applied to control the air conditioner.
In an embodiment of the present invention, referring to fig. 2, a control apparatus of an air conditioner includes: a processor 1001 (e.g., CPU), memory 1002, etc. The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.
An indoor fan 1, an outdoor fan 6, a compressor 3, a four-way valve 4, an electronic expansion valve 5, a temperature detection module 7, an air outlet regulation and control component, a fresh air regulation and control component and the like in the air conditioner are all connected with a control device.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 2 is not intended to be limiting of the device 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. 2, a control program of the air conditioner may be included in the memory 1002 as a kind of computer readable storage medium. In the apparatus shown in fig. 2, the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002 and perform operations of the relevant steps of the control method of the air conditioner in the following embodiments.
The embodiment of the invention also provides a control method of the air conditioner, which is applied to control the air conditioner.
Referring to fig. 3, an embodiment of a control method of an air conditioner according to the present application is provided. In this embodiment, the method for controlling an air conditioner includes:
step S10, responding to a defrosting instruction, and controlling the air conditioner to operate in a defrosting mode;
the defrosting instruction is specifically an air conditioner control instruction for starting the air conditioner to enter defrosting operation, and can be input by a user based on actual requirements, and can also be automatically generated by the air conditioner based on monitoring results of outdoor working conditions (such as outdoor environment temperature, outdoor heat exchanger temperature and the like).
When a defrosting instruction is detected, the air conditioner can be controlled to operate in a refrigerating mode, the indoor heat exchanger of the air conditioner absorbs heat in an evaporation state under the refrigerating state, the outdoor heat exchanger releases heat in a condensation state, and the heat released by refrigerant in the outdoor heat exchanger can melt the frost of the outdoor unit so as to achieve defrosting of the air conditioner.
Specifically, in this embodiment, the defrosting of the air conditioner in the refrigeration state specifically means that the compressor is started, the four-way valve operates in a refrigeration valve position, a refrigerant flowing out of the compressor sequentially passes through the outdoor heat exchanger, the electronic expansion valve and the indoor heat exchanger and then flows back to the compressor under the flow direction adjusting effect of the four-way valve, and the outdoor heat exchanger serves as a refrigerant of the condenser to emit heat to melt frost on the outdoor heat exchanger and even on other areas of the outdoor unit. Besides the refrigeration operation of the air conditioner, the electronic expansion valve can synchronously operate at an opening degree (such as the maximum opening degree allowed by the electronic expansion valve) which is greater than or equal to the set opening degree threshold value, so that the throttling effect of the electronic expansion valve is reduced, the temperature of a refrigerant in the outdoor heat exchanger is further improved, and the rapid defrosting is realized. In addition, in other embodiments, when the air conditioner is in a heating state and defrosted, fresh air can be introduced according to subsequent steps to exchange heat for the indoor heat exchanger.
Further, after the electronic expansion valve operates for a set time at an opening degree greater than a set opening degree threshold value, the temperature of the outdoor heat exchanger of the air conditioner can be acquired; and controlling the electronic expansion valve to reduce the opening degree according to the temperature of the outdoor heat exchanger. Specifically, the adjustment range of the opening degree of the electronic expansion valve can be increased along with the increase of the temperature of the outdoor heat exchanger, and on the basis, the electronic expansion valve is reduced to a lower opening degree when the temperature of the outdoor heat exchanger is higher, so that the high-temperature refrigerant is deposited to the rear half section of the outdoor heat exchanger through the reduction of the opening degree of the electronic expansion valve after the defrosting of the front half section of the outdoor heat exchanger close to the refrigerant inlet is finished, and the defrosting efficiency and the defrosting and defrosting cleaning of the rear half section of the outdoor heat exchanger are improved.
It should be noted that, when the refrigeration defrosting is started, the outdoor fan can be controlled to be turned off, so as to ensure the defrosting effect of the outdoor unit.
Step S20, opening the fresh air inlet and controlling the indoor fan to be opened; when the indoor fan is started, outdoor air enters the air duct from the fresh air inlet to exchange heat with the indoor heat exchanger.
Specifically, the fresh air control valve that in the steerable fresh air wind channel or the fresh air entry set up opens to open the fresh air entry, the synchronous steerable indoor fan of opening at the fresh air entry is opened, and the air among the outdoor environment can enter into the casing from the fresh air entry when indoor fan opens, carries out the heat transfer with indoor evaporimeter.
The opening of the fresh air inlet and the opening of the indoor fan can be synchronously opened when the air conditioner starts refrigeration and defrosting, and can also be opened after the air conditioner starts refrigeration and defrosting for a certain time. Specifically, in this embodiment, the fresh air inlet and the indoor fan may be turned on in a delayed manner after the air conditioner starts the refrigeration operation and has a certain time, specifically, the time delay may be determined according to the coil temperature of the outdoor heat exchanger when the refrigeration and defrosting are started, and the lower the coil temperature, the shorter the time delay.
The indoor fan can be operated at a preset rotating speed when being started, and the operating rotating speed of the indoor fan can be determined according to the actual operating condition of the air conditioner in the defrosting process.
Furthermore, in order to avoid the influence of cold air after the heat exchange of the indoor evaporator on the heat comfort of indoor users caused by the fact that the cold air enters the indoor environment, the indoor air outlet can be closed firstly before the step of controlling the indoor fan to be opened.
Furthermore, in order to enable air to be smoothly discharged out of the shell after heat exchange, so as to enhance the flow of air flow in the shell and improve the heat exchange efficiency of the indoor heat exchanger, when the shell is further provided with a water outlet communicated with the outdoor space, the water outlet can be opened in addition to closing the indoor air outlet before the indoor fan is opened. The opening of the exhaust port and the closing of the indoor air outlet can be executed simultaneously or sequentially according to actual requirements, and the sequence is not particularly limited. Based on this, when indoor fan operates, the new trend enters into in the casing and carries out the heat transfer back with indoor heat exchanger, can follow the outlet discharge outdoor, and through this mode, the casing can need not to set up extra gas vent, also can avoid cold wind to enter into indoor environment and influence indoor travelling comfort and strengthen indoor heat exchanger's heat exchange efficiency simultaneously to improve the defrosting effect that the return air temperature strengthened outdoor heat exchanger.
According to the control method of the air conditioner, provided by the embodiment of the invention, in the process of refrigerating and defrosting the air conditioner in response to a defrosting instruction, fresh air is introduced into the air conditioner to exchange heat with the indoor heat exchanger by opening the fresh air and controlling the indoor fan to be opened, so that the heat exchange state of the indoor evaporator can be maintained by fresh air drainage instead of stopping the heat exchange in the defrosting process, the return air temperature of the system is effectively prevented from being too low, the heat exchange output capacity of the system in the defrosting process is improved, and the defrosting effect of the outdoor unit is effectively improved.
Further, based on the above embodiments, another embodiment of the control method of the air conditioner of the present application is provided. In this embodiment, referring to fig. 4, before the step S20, the method further includes:
step S101, acquiring the outdoor environment temperature and the indoor heat exchanger temperature in the defrosting operation process of the air conditioner;
specifically, when the air conditioner is started to defrost for the certain time, the data detected by the temperature detection module in the outdoor environment is read in real time to obtain the outdoor environment temperature, and the data detected by the temperature detection module on the coil (such as the middle part of the coil) of the indoor heat exchanger is synchronously read to obtain the temperature of the indoor heat exchanger.
Step S102, determining a temperature difference value between the outdoor environment temperature and the indoor heat exchanger temperature;
the temperature difference is specifically the absolute value of the difference between the outdoor ambient temperature and the indoor heat exchanger temperature.
Step S103, judging whether the temperature of the indoor heat exchanger is lower than the outdoor environment temperature, and judging whether the temperature difference value is larger than or equal to a set value;
if the temperature of the indoor heat exchanger is less than the outdoor environment temperature and the temperature difference value is greater than or equal to a set value, step S20 is executed.
Here, just introduce the new trend when guaranteeing that outdoor ambient temperature is higher than indoor heat exchanger temperature and two temperatures reach certain difference in temperature and carry out the heat transfer with indoor heat exchanger in the casing, be favorable to guaranteeing indoor heat exchanger's heat transfer effect to further ensure the effective improvement of outdoor defrosting effect.
Further, in this embodiment, in order to guarantee that the heat transfer effect further improves between the new trend of introducing and the indoor heat exchanger, the step that the fan was opened in the specific control room includes:
step S21, determining the target rotating speed of the indoor fan according to the temperature difference value;
specifically, different temperature difference values correspond to different target rotating speeds of the indoor fan. The larger the temperature difference value is, the larger the target rotating speed is; conversely, the smaller the temperature difference value, the smaller the target rotation speed. The corresponding relation between the temperature difference value and the rotating speed of the indoor fan can be preset, and can be a mapping relation, a calculation formula and the like. Based on the corresponding relation, the target rotating speed of the indoor fan corresponding to the current temperature difference value can be determined. For example, the target rotation speed may be calculated by N ═ a × Δ T, where N is the target rotation speed of the indoor fan, a is a preset constant, and Δ T is a temperature difference value.
And step S22, controlling the indoor fan to operate according to the target rotating speed.
In this embodiment, the indoor fan is controlled to start to introduce the fresh air through the steps S21 and S22, so that the introduced fresh air volume can be ensured to be matched with the heat exchange capacity of the indoor heat exchanger, the heat exchange effect between the indoor heat exchanger and the fresh air is ensured to be optimal, and the improvement of the overall heat exchange capacity of the refrigerant system is further improved, so that the temperature of the refrigerant entering the outdoor heat exchanger is further improved, and the defrosting effect of the outdoor unit is effectively improved.
Further, in this embodiment, the step of determining the target rotation speed of the indoor fan according to the temperature difference value includes:
step S211, acquiring temperature characteristic parameters of the outdoor heat exchanger;
the temperature characteristic parameter may be a coil temperature currently detected by the outdoor heat exchanger, or may be a variation parameter (such as a variation amplitude, a variation rate, and/or a variation trend) of the coil temperature of the outdoor heat exchanger in a time period corresponding to a time period from a refrigeration and defrosting start time to a current time.
Step S212, acquiring the corresponding relation between the temperature difference and the rotating speed according to the temperature characteristic parameters of the outdoor heat exchanger;
the corresponding relation between the temperature difference and the rotating speed is specifically represented by the corresponding relation between the temperature deviation between the outdoor environment and the indoor heat exchanger and the operating rotating speed of the indoor fan. The corresponding relation between the temperature difference and the rotating speed can be preset to be a plurality of, and the temperature characteristic parameters of different outdoor heat exchangers can respectively correspond to the corresponding relation between the different temperature difference and the different rotating speed. Specifically, the lower the current coil temperature of the outdoor heat exchanger is, the higher the indoor fan rotation speed corresponding to the temperature value in the obtained correspondence relationship can be; or, the larger the temperature variation amplitude of the outdoor heat exchanger after the refrigeration and defrosting are started is, the smaller the rotating speed of the indoor fan corresponding to the temperature value in the obtained corresponding relation can be.
And S213, determining the target rotating speed of the indoor fan corresponding to the temperature difference value based on the corresponding relation between the temperature difference and the rotating speed.
Specifically, the indoor fan rotation speed corresponding to the obtained temperature difference value in the correspondence relationship is taken as the target rotation speed.
In this embodiment, the corresponding relationship between the temperature difference and the rotating speed of the indoor fan is obtained according to the defrosting condition of the outdoor heat exchanger, so that the accuracy of the determined rotating speed of the indoor fan is further improved, and the fact that the introduced fresh air volume can effectively improve the defrosting effect of the outdoor unit when the determined target rotating speed controls the operation of the indoor fan is ensured.
Further, based on any of the above embodiments, another embodiment of the control method of the air conditioner of the present application is provided. In this embodiment, referring to fig. 5, after step S20, the method further includes:
step S30, acquiring temperature change parameters of the outdoor heat exchanger; the temperature change parameter is a characteristic parameter of temperature change in the defrosting operation process of the air conditioner;
the temperature change parameters specifically comprise characteristic parameters such as temperature change amplitude, temperature change rate, temperature change curve and temperature change trend which characterize the temperature change of the outdoor heat exchanger in the defrosting process. Specifically, in this embodiment, the temperature variation parameter may specifically refer to a variation characteristic parameter of a refrigerant outlet temperature of the outdoor heat exchanger coil.
Specifically, the step S30 herein may be performed at a certain time period after the air conditioner cooling defrosting operation is performed or at a set time period after the step S20 is performed.
In this embodiment, the temperature change parameter refers to a temperature change range from defrosting start to the current moment, and a first temperature and a second temperature of the outdoor heat exchanger are obtained; the first temperature is detected when the air conditioner starts a refrigeration state for defrosting, and the second temperature is the currently detected temperature; determining a temperature difference between the second temperature and the first temperature as the temperature change parameter. Specifically, the first temperature is T1, and the second temperature is T2, then the temperature variation parameter is | T1-T2 |.
Step S40, determining the operation parameters of the outdoor fan according to the temperature change parameters;
the operation parameters of the outdoor fan specifically include control parameters for turning on or off the outdoor fan, the operation speed of the outdoor fan, the operation steering of the outdoor fan and the like.
Different temperature variation parameters correspond to different operating parameters of the outdoor fan. Specifically, in this embodiment, different temperature differences correspond to different operating parameters of the outdoor fan. If the temperature difference is smaller than a set threshold value, determining the operation parameter as the outdoor fan is turned off; and if the temperature difference is greater than or equal to a set threshold value, determining the operation parameter as starting the outdoor fan. The set threshold value is greater than or equal to 0, and the specific size can be set according to actual conditions. The temperature difference is smaller than a set threshold value, which indicates that the overall temperature of the outdoor heat exchanger is low, and after defrosting is started, the great part of frost is not melted, and the outdoor fan can be controlled to be turned off; the temperature difference is larger than or equal to a set threshold value, which indicates that frost on the outdoor heat exchanger is partially melted, and the outdoor fan can be controlled to be started at the moment.
Specifically, the outdoor heat exchanger comprises an inner side and an outer side, and the distance between the outer side of the outdoor heat exchanger and the outdoor air outlet of the air conditioner is smaller than the distance between the inner side of the outdoor heat exchanger and the outdoor air outlet of the air conditioner. The refrigerant inlet of the outdoor heat exchanger coil can be arranged on the inner side, the refrigerant outlet can be arranged on the outer side, and based on the refrigerant inlet, the high-temperature refrigerant flowing out of the compressor can flow to the outer side of the outdoor heat exchanger coil from the inner side of the outdoor heat exchanger coil. The outdoor fan is started and controlled to rotate in a set direction, the outdoor fan blows air to the outer side from the inner side in the set direction during rotation, residual heat generated after defrosting of an inner side refrigerant can be blown to the outer side coil pipe to defrost the outer side coil pipe, and accordingly defrosting efficiency of the outdoor heat exchanger can be improved effectively.
Specifically, the operating speed of the outdoor fan when being started can be determined according to the current speed of the indoor fan. The rotation speed of the indoor fan may be determined in the manner mentioned in the above embodiments.
And step S50, controlling the outdoor fan to operate according to the operation parameters.
In this embodiment, outdoor heat exchanger can characterize outdoor heat exchanger's the defrosting progress at the temperature variation parameter of defrosting start-up back, on the basis, is adapted to the temperature variation parameter and regulates and control outdoor fan's operation, can guarantee that outdoor fan's operation can with outdoor heat exchanger's defrosting progress phase-match, make outdoor fan's operation can realize the effective improvement of defrosting efficiency with outdoor heat exchanger's heat transfer condition cooperation. When the temperature difference is small after defrosting is started, which indicates that most frost of the outdoor heat exchanger is not melted, the outdoor fan is turned off to effectively avoid heat dissipation of the outdoor heat exchanger, so that the outdoor heat exchanger has higher temperature to intensively dissipate heat of the frost on the coil pipe, and the frost is quickly melted; when the temperature difference is large after defrosting is started, it is indicated that defrosting is completed in partial areas of the coil pipe of the outdoor heat exchanger, and at the moment, the outdoor fan is started to increase the air flow flux of the outdoor unit, so that the heat of the refrigerant can be quickly dissipated to different areas of the outdoor heat exchanger, the residual frost of the outdoor heat exchanger is melted, and the defrosting effect and efficiency of the outdoor heat exchanger are effectively improved.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, where a control program of an air conditioner is stored on the computer-readable storage medium, and when the control program of the air conditioner is executed by a processor, the relevant steps of any embodiment of the above control method of the air conditioner are implemented.
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, an air conditioner, 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 (15)
1. A control method of an air conditioner is characterized in that the air conditioner comprises a shell, an indoor heat exchanger and an indoor fan, the shell is provided with a fresh air inlet, an air channel is arranged in the shell, the fresh air inlet is communicated with the air channel, the indoor heat exchanger and the indoor fan are both arranged in the air channel, and the control method of the air conditioner comprises the following steps:
responding to a defrosting instruction, and controlling the air conditioner to perform defrosting operation;
opening the fresh air inlet and controlling the indoor fan to be opened;
when the indoor fan is started, outdoor air enters the air duct from the fresh air inlet to exchange heat with the indoor heat exchanger.
2. The method for controlling an air conditioner according to claim 1, wherein before the step of turning on the fresh air inlet and controlling the indoor fan, the method further comprises:
acquiring the outdoor environment temperature and the indoor heat exchanger temperature in the defrosting operation process of the air conditioner;
determining a temperature difference value between the outdoor environment temperature and the indoor heat exchanger temperature;
and if the temperature of the indoor heat exchanger is lower than the outdoor environment temperature and the temperature difference value is larger than or equal to a set value, executing the step of opening the fresh air inlet and controlling the indoor fan to be opened.
3. The control method of an air conditioner according to claim 2, wherein the step of controlling the indoor fan to be turned on comprises:
determining a target rotating speed of the indoor fan according to the temperature difference value;
and controlling the indoor fan to operate according to the target rotating speed.
4. The control method of an air conditioner according to claim 3, wherein the step of determining the target rotation speed of the indoor fan according to the temperature difference value includes:
acquiring temperature characteristic parameters of the outdoor heat exchanger;
acquiring a corresponding relation between the temperature difference and the rotating speed according to the temperature characteristic parameters of the outdoor heat exchanger;
and determining the target rotating speed of the indoor fan corresponding to the temperature difference value based on the corresponding relation between the temperature difference and the rotating speed.
5. The method of controlling an air conditioner according to claim 1, further comprising, after the step of controlling the indoor fan to be turned on:
acquiring temperature change parameters of the outdoor heat exchanger; the temperature change parameter is a characteristic parameter of temperature change in the defrosting operation process of the air conditioner;
determining the operating parameters of the outdoor fan according to the temperature change parameters;
and controlling the outdoor fan to operate according to the operation parameters.
6. The control method of an air conditioner according to claim 5, wherein the step of obtaining a temperature variation parameter of an outdoor heat exchanger of the air conditioner comprises:
acquiring a first temperature and a second temperature of an outdoor heat exchanger; the first temperature is detected when the air conditioner starts a refrigeration state for defrosting, and the second temperature is the currently detected temperature;
determining a temperature difference between the second temperature and the first temperature as the temperature change parameter.
7. The control method of an air conditioner according to claim 6, wherein the step of determining the operation parameter of the outdoor fan according to the temperature variation parameter includes:
if the temperature difference is smaller than a set threshold value, determining the operation parameter as the outdoor fan is turned off;
and if the temperature difference is greater than or equal to the set threshold, determining the operation parameter as starting the outdoor fan.
8. The control method of an air conditioner according to claim 7, wherein said turning on the outdoor fan includes controlling the outdoor fan to set a turning operation;
the outdoor heat exchanger comprises an inner side and an outer side, the distance between the outer side of the outdoor heat exchanger and the outdoor air outlet of the air conditioner is smaller than the distance between the inner side of the outdoor heat exchanger and the outdoor air outlet of the air conditioner, and the outdoor fan blows air to the outer side from the inner side in the set turning direction during operation.
9. The control method of an air conditioner according to claim 1, wherein the step of controlling the defrosting operation of the air conditioner includes:
and controlling an electronic expansion valve of the air conditioner to operate at an opening degree larger than a set opening degree threshold value.
10. The method of controlling an air conditioner according to claim 9, wherein after the step of controlling the electronic expansion valve of the air conditioner to operate at an opening degree greater than a set opening degree threshold, further comprising:
setting time interval to obtain the temperature of an outdoor heat exchanger of the air conditioner;
and controlling the electronic expansion valve to reduce the opening degree according to the temperature of the outdoor heat exchanger.
11. The method of controlling an air conditioner according to any one of claims 1 to 10, wherein the casing is further provided with an indoor air outlet, and before the step of controlling the indoor fan to be turned on, the method further comprises:
and closing the indoor air outlet.
12. The method of controlling an air conditioner according to claim 11, wherein the casing is further provided with a drain port communicating with the outside for discharging the condensed water generated in the casing to the outside, and before the step of controlling the indoor fan to be turned on, the method further comprises:
closing the indoor air outlet and opening the water outlet;
when the indoor fan is started, fresh air after heat exchange is discharged outdoors from the water outlet.
13. A control apparatus of an air conditioner, comprising: a memory, a processor, and a control program of an air conditioner stored on the memory and executable on the processor, the control program of the air conditioner implementing the steps of the control method of the air conditioner as claimed in any one of claims 1 to 12 when executed by the processor.
14. An air conditioner, characterized in that the air conditioner comprises:
the fresh air inlet is formed in the shell, an air channel is formed in the shell, and the fresh air inlet is communicated with the air channel;
the indoor heat exchanger is arranged in the air duct;
the indoor fan is arranged in the air duct; and
the control device of the air conditioner as claimed in claim 13, wherein the indoor fan is connected to the control device.
15. A computer-readable storage medium, characterized in that a control program of an air conditioner is stored thereon, which when executed by a processor implements the steps of the control method of the air conditioner according to any one of claims 1 to 12.
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| CN202011621728.8A CN114688630A (en) | 2020-12-30 | 2020-12-30 | Air conditioner, control method and device thereof and readable storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024109073A1 (en) * | 2022-11-25 | 2024-05-30 | 青岛海尔空调器有限总公司 | Recreational vehicle air conditioning system and control method therefor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894061A (en) * | 2017-10-23 | 2018-04-10 | 合肥美的暖通设备有限公司 | Fresh air conditioner-mechanical, defrosting method and computer-readable recording medium |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894061A (en) * | 2017-10-23 | 2018-04-10 | 合肥美的暖通设备有限公司 | Fresh air conditioner-mechanical, defrosting method and computer-readable recording medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024109073A1 (en) * | 2022-11-25 | 2024-05-30 | 青岛海尔空调器有限总公司 | Recreational vehicle air conditioning system and control method therefor |
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