CN113790513B - Self-cleaning method for air conditioner - Google Patents
Self-cleaning method for air conditioner Download PDFInfo
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- CN113790513B CN113790513B CN202111146095.4A CN202111146095A CN113790513B CN 113790513 B CN113790513 B CN 113790513B CN 202111146095 A CN202111146095 A CN 202111146095A CN 113790513 B CN113790513 B CN 113790513B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 239000003507 refrigerant Substances 0.000 claims abstract description 30
- 238000005057 refrigeration Methods 0.000 claims abstract description 7
- 238000011086 high cleaning Methods 0.000 abstract description 4
- 238000010257 thawing Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F24F11/43—Defrosting; Preventing freezing of indoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application discloses a self-cleaning method of an air conditioner, which comprises the following steps: starting a self-cleaning mode; controlling a compressor to perform refrigeration operation; detecting the temperature Tc of an indoor heat exchanger, and controlling the start and stop of an indoor fan and the flow of a refrigerant according to the temperature Tc of the indoor heat exchanger so as to frost the indoor heat exchanger; controlling the compressor to perform heating operation so as to defrost the indoor heat exchanger and clean the indoor heat exchanger; and controlling the indoor fan to run. The self-cleaning method of the air conditioner has the advantages of high cleaning efficiency, large cleaning range and the like.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a self-cleaning method of an air conditioner.
Background
In the related art, the air conditioner eliminates dirt on fins of the indoor heat exchanger in a frosting, defrosting, cleaning and drying mode through condensed water of the indoor heat exchanger, but no air is circulated, only water around the heat exchanger can be frozen, the frosting water content is too low, the range of the frozen heat exchanger is too small, a large cleaning area cannot be covered, and the self-cleaning effect of the air conditioner is poor.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present application is to provide a self-cleaning method for an air conditioner, which has the advantages of high cleaning efficiency, large cleaning range, and the like.
To achieve the above object, according to an embodiment of the present application, there is provided an air conditioner self-cleaning method, including: starting a self-cleaning mode; controlling a compressor to perform refrigeration operation; detecting the temperature Tc of an indoor heat exchanger, and controlling the start and stop of an indoor fan and the flow of a refrigerant according to the temperature Tc of the indoor heat exchanger so as to frost the indoor heat exchanger; controlling the compressor to perform heating operation so as to defrost the indoor heat exchanger and clean the indoor heat exchanger; and controlling the indoor fan to run.
The self-cleaning method of the air conditioner has the advantages of high cleaning efficiency, large cleaning range and the like.
According to some embodiments of the present application, controlling the start-stop of the indoor fan and the refrigerant flow according to the indoor heat exchanger temperature Tc includes: judging whether the temperature Tc of the indoor heat exchanger is smaller than a first preset low temperature or not; if so, controlling the indoor fan to run at the lowest wind speed; as would otherwise be the case by reducing the opening of the electronic expansion valve to reduce the refrigerant flow.
Further, if the indoor heat exchanger temperature Tc is smaller than the first preset low temperature, after the indoor fan runs for a first preset time at the lowest wind speed, detecting the indoor heat exchanger temperature Tc again, and judging whether the indoor heat exchanger temperature Tc is smaller than the second preset low temperature; and if not, reducing the opening of the electronic expansion valve to reduce the refrigerant flow.
Further, after the opening degree of the electronic expansion valve is reduced, judging whether the opening degree of the electronic expansion valve is minimum; if so, keeping the current state of the air conditioner continuously running for a second preset time.
According to some embodiments of the application, the compressor is controlled to operate at maximum frequency for a third preset time before detecting the indoor heat exchanger temperature Tc.
According to some embodiments of the application, the controlling the compressor heating operation includes: detecting heating operation time, indoor environment temperature T1 and indoor heat exchanger temperature Tc; and controlling the start and stop of the compressor, the opening of the electronic expansion valve and the start and stop of the indoor fan according to the heating running time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc so as to defrost the indoor heat exchanger and clean the indoor heat exchanger.
Further, controlling start-stop of the compressor according to the heating operation time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc includes: judging whether the indoor environment temperature T1 is greater than a preset indoor temperature or not; if so, controlling the indoor fan to run at the lowest wind speed; if not, the indoor fan and the compressor are controlled to stop running, and the opening of the electronic expansion valve is controlled to be maximum.
Further, controlling start and stop of the compressor according to the heating operation time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc, further includes: after the compressor is controlled to stop running for a fourth preset time, controlling the compressor to perform heating running and controlling the indoor fan to run at the lowest wind speed; detecting the temperature Tc of the indoor heat exchanger; judging whether the temperature Tc of the indoor heat exchanger is greater than a first preset high temperature or not; and if not, reducing the opening degree of the electronic expansion valve.
According to some embodiments of the application, the start-stop of the compressor is controlled according to the heating operation time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc, and the method further comprises: after the opening degree of the electronic expansion valve is reduced, judging whether the opening degree of the electronic expansion valve is minimum; if so, judging whether the heating operation time of the compressor reaches a fifth preset time or whether the temperature Tc of the indoor heat exchanger reaches a first preset high temperature; if so, the compressor is controlled to stop running.
According to some embodiments of the application, the start-stop of the compressor is controlled according to the heating operation time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc, and the method further comprises: after controlling the indoor fan to run at the lowest wind speed, detecting the temperature Tc of the indoor heat exchanger; judging whether the temperature Tc of the indoor heat exchanger is not less than a second preset high temperature or whether the heating time of the compressor reaches a sixth preset time; if so, the compressor is controlled to stop running.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of a first portion of a self-cleaning method of an air conditioner according to an embodiment of the present application;
fig. 2 is a flowchart of a second part of a self-cleaning method of an air conditioner according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
The self-cleaning method of the air conditioner according to the embodiment of the present application is described below with reference to the drawings.
As shown in fig. 1 and 2, the self-cleaning method of an air conditioner according to an embodiment of the present application includes:
starting a self-cleaning mode;
controlling a compressor to perform refrigeration operation;
detecting the temperature Tc of the indoor heat exchanger, and controlling the start and stop of the indoor fan and the flow of the refrigerant according to the temperature Tc of the indoor heat exchanger so as to frost the indoor heat exchanger;
controlling the compressor to perform heating operation so as to defrost the indoor heat exchanger and clean the indoor heat exchanger;
and controlling the indoor fan to run.
For example, the compressor, the four-way valve, the indoor heat exchanger and the electronic expansion valve are sequentially connected to form a refrigerant loop, the flow of the refrigerant is controlled by controlling the opening degree of the electronic expansion valve, the opening degree of the expansion valve is small, the evaporation temperature is reduced, the low-pressure is also reduced, and the indoor heat exchanger is more prone to frosting. The temperature of the indoor heat exchanger is measured by a temperature sensor, and the specifically measured temperature is the temperature of the coil pipe of the indoor heat exchanger. The indoor fan may direct indoor airflow to the indoor heat exchanger.
According to the self-cleaning method of the air conditioner, the indoor fan can be stopped when the temperature Tc of the indoor heat exchanger is high by controlling the start and stop of the indoor fan, so that the indoor heat exchanger can be cooled rapidly, and when the temperature Tc of the indoor heat exchanger reaches a low enough temperature, the indoor fan is opened to convey indoor gas to the indoor heat exchanger, and as the indoor gas contains water vapor, the indoor moisture is continuously conveyed to the indoor heat exchanger by the indoor fan, so that the moisture content of the indoor heat exchanger is high, the frosting area of the indoor heat exchanger is enlarged, and the indoor heat exchanger can be frosted rapidly at a low temperature. And when the flow of the refrigerant is controlled to be reduced, namely the opening of the electronic expansion valve is controlled to be reduced, so that the flow of the refrigerant is reduced, the evaporation temperature is reduced, frosting of the indoor heat exchanger is further promoted, and the self-cleaning efficiency of the air conditioner is improved.
When the indoor heat exchanger frosts, dirt on the fins of the indoor heat exchanger is peeled off by frost, and the indoor fan guides indoor vapor to the indoor heat exchanger, so that the indoor heat exchanger can be frosted in a large area, and the dirt on the fins is further washed by defrosting the indoor heat exchanger, so that a large cleaning area is achieved. The heat of the indoor heat exchanger after the stains are washed can continuously evaporate the water on the fins, so that the surface of the indoor heat exchanger is dried. And after the indoor heat exchanger is cleaned and dried, the floating dust on the surface of the indoor heat exchanger can be blown off after the indoor fan is controlled to run for 30 minutes, the temperature of the indoor heat exchanger is quickly reduced, and the self-cleaning of the air conditioner is completed.
Therefore, the self-cleaning method of the air conditioner has the advantages of high cleaning efficiency, large cleaning range and the like.
In some embodiments of the present application, as shown in fig. 1, controlling the start-stop of an indoor fan and the flow of refrigerant according to an indoor heat exchanger temperature Tc includes:
judging whether the temperature Tc of the indoor heat exchanger is smaller than a first preset low temperature, for example, the first preset low temperature can be minus 10 ℃;
if so, controlling the indoor fan to operate at the lowest wind speed;
as would otherwise be the case by reducing the opening of the electronic expansion valve to reduce the refrigerant flow.
When the temperature Tc of the indoor heat exchanger is smaller than the first preset low temperature, the indoor fan is controlled to operate at the lowest wind speed, so that the indoor gas can be accelerated to convey water vapor to the indoor heat exchanger, the water vapor content at the indoor heat exchanger is increased, the temperature is lower, and the indoor heat exchanger is easier to frost.
When the temperature Tc of the indoor heat exchanger is not less than the first preset low temperature, the temperature of the indoor heat exchanger needs to be reduced at first, and at the moment, the indoor fan is closed, so that the cooling rate of the indoor heat exchanger can be increased. And the opening of the electronic expansion valve is reduced to reduce the flow of the refrigerant, so that the cooling rate of the indoor heat exchanger is further accelerated, and the frosting of the indoor heat exchanger is more sufficient.
Further, as shown in fig. 1, if the indoor heat exchanger temperature Tc is less than the first preset low temperature, the indoor fan is operated at the lowest wind speed for a first preset time, and then the indoor heat exchanger temperature Tc is detected again,
judging whether the temperature Tc of the indoor heat exchanger is smaller than a second preset low temperature, for example, the second preset low temperature can be-8 ℃;
the opening of the electronic expansion valve is reduced to reduce the refrigerant flow if not.
For example, the first preset time may be 1 minute. When the temperature Tc of the indoor heat exchanger is smaller than the first preset low temperature, the change of the temperature Tc of the indoor coil in the first preset time can be detected in real time, if the temperature Tc of the indoor heat exchanger is judged to be lower than the second preset low temperature, the indoor fan is kept to operate at the lowest wind speed, and the temperature Tc of the indoor heat exchanger is detected again after the first preset time until the temperature Tc of the indoor heat exchanger is larger than or equal to the second preset low temperature.
When the indoor ring temperature is not less than the second preset low temperature, the opening of the electronic expansion valve is reduced to reduce the flow rate of the refrigerant, so that the flow rate of the refrigerant is reduced, the evaporation temperature is reduced, and frosting of the indoor heat exchanger is promoted.
Further, as shown in fig. 1, after the opening of the electronic expansion valve is reduced, whether the opening of the electronic expansion valve is the smallest is judged;
if so, the current state of the air conditioner is kept to run for a second preset time, for example, the second preset time may be 25 minutes.
When the opening of the electronic expansion valve is minimum, the evaporation temperature is the lowest, the indoor heat exchanger is most prone to frosting, after the air conditioner keeps the current state for the second preset time, the indoor heat exchanger frosts fully, frosting of the indoor heat exchanger is completed, at the moment, stains of the indoor heat exchanger are frosted and peeled from the surface of the indoor heat exchanger, and further cleaning is facilitated.
In some embodiments of the present application, as shown in fig. 1, the compressor is controlled to operate at the maximum frequency for a third preset time before the indoor heat exchanger temperature Tc is detected.
For example, the third preset time can be 7 minutes, the compressor is controlled to perform refrigeration operation at the maximum frequency in the third preset time, the temperature of the indoor heat exchanger can be quickly reduced, the low temperature required by frosting is further quickly achieved, and the air swinging angle of the indoor air deflector can be set to be an angle for preventing people from being blown, so that the people in the room are prevented from being influenced by direct blowing of cold air.
In some embodiments of the present application, as shown in fig. 2, controlling the compressor to run thermally includes:
detecting heating operation time, indoor environment temperature T1 and indoor heat exchanger temperature Tc;
and controlling the start and stop of the compressor, the opening of the electronic expansion valve and the start and stop of the indoor fan according to the heating running time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc so as to defrost the indoor heat exchanger and clean the indoor heat exchanger.
The indoor heat exchanger temperature Tc is also different under different indoor ambient temperature T1 conditions. The indoor heat exchanger can be accurately controlled to perform heating defrosting according to the indoor environment temperature T1, the corresponding heating running time and the indoor heat exchanger temperature Tc, so that the indoor heat exchanger can be fully defrosted, the moisture of the indoor heat exchanger can be evaporated, and the indoor heat exchanger can be ensured to be clean and dry.
Further, as shown in fig. 2, controlling the start-stop of the compressor according to the heating operation time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc includes:
judging whether the indoor environment temperature T1 is larger than a preset indoor temperature, for example, the preset indoor temperature can be 15 ℃;
if so, controlling the indoor fan to run at the lowest wind speed;
if not, the indoor fan and the compressor are controlled to stop running, and the opening of the electronic expansion valve is controlled to be maximum.
When the indoor environment temperature T1 is greater than the preset indoor temperature, the indoor heat load is small, the indoor fan is controlled to operate at the lowest wind speed, and meanwhile, the compressor is heated to operate without shutdown protection, so that the defrosting efficiency is improved.
When the indoor environment temperature T1 is smaller than or equal to the preset indoor temperature, the indoor temperature is lower at the moment, the compressor just completes refrigeration operation, the indoor fan and the compressor are controlled to stop operation, a certain protection is generated for the compressor, and frost on the surface of the indoor heat exchanger is prevented from being blown out when the fan blows. The electronic expansion valve is controlled to have the largest opening, so that the indoor heat exchanger can be heated up most quickly, and the defrosting is quick.
Further, as shown in fig. 2, the method for controlling the start and stop of the compressor according to the heating operation time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc further comprises:
after the compressor is controlled to stop running for a fourth preset time, controlling the compressor to perform heating running and controlling the indoor fan to perform running at the lowest wind speed;
detecting the temperature Tc of an indoor heat exchanger;
judging whether the temperature Tc of the indoor heat exchanger is greater than a first preset high temperature or not;
if not, the opening degree of the electronic expansion valve is reduced.
For example, the fourth preset time is 3 minutes, and the first preset high temperature may be 50 ℃. The compressor heats and operates after the fourth preset time to raise the temperature of the indoor heat exchanger, so that the indoor heat exchanger can be quickly defrosted, and the aim of flushing stains of the indoor heat exchanger is fulfilled. The indoor fan is controlled to run at the lowest wind speed, so that the evaporation of water in the indoor heat exchanger can be quickened, and meanwhile, the air deflector regulator of the air conditioner prevents people from blowing at an angle and avoids conveying high-temperature and high-humidity air flow indoors. When the temperature Tc of the indoor heat exchanger is less than or equal to the first preset high temperature, the opening of the electronic expansion valve is reduced, the temperature of the indoor heat exchanger is increased, defrosting of the indoor heat exchanger is promoted, and further melting, flushing and drying of the indoor heat exchanger are accelerated.
Further, as shown in fig. 2, the method for controlling the start and stop of the compressor according to the heating operation time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc further comprises:
after the opening degree of the electronic expansion valve is reduced, judging whether the opening degree of the electronic expansion valve is minimum;
if so, judging whether the heating operation time of the compressor reaches the fifth preset time or whether the temperature Tc of the indoor heat exchanger reaches the first preset high temperature;
if so, the compressor is controlled to stop running.
For example, the fifth preset time may be 5 minutes, and when the opening of the electronic expansion valve is the minimum, the thawing and defrosting efficiency of the indoor heat exchanger may be ensured. When the compressor heating reaches the fifth preset time or when the indoor heat exchanger temperature Tc reaches the first preset high temperature, the indoor heat exchanger is heated enough to ensure defrosting of the indoor heat exchanger, and the compressor operation is stopped at the moment to finish defrosting of the indoor heat exchanger.
In the continuous heating process of the indoor heat exchanger, if the opening degree of the electronic expansion valve is judged to be not minimum, whether the temperature Tc of the indoor heat exchanger reaches a first preset high temperature is continuously judged, and if the temperature Tc of the indoor heat exchanger does not reach the first preset high temperature, the opening degree of the electronic expansion valve is reduced until the temperature Tc of the indoor heat exchanger reaches the first preset high temperature or the opening degree of the electronic expansion valve reaches minimum, so that the heating effect on the indoor heat exchanger is best when the electronic expansion valve reaches the minimum opening degree, and defrosting, cleaning and drying efficiency is improved.
And when the electronic expansion valve reaches the minimum opening degree, judging whether the heating operation time of the compressor reaches the fifth preset time or whether the temperature Tc of the indoor heat exchanger reaches the first preset high temperature or not through judgment. Ensure more thorough defrosting, cleaning and drying, and simultaneously avoid the overhigh temperature of the indoor heat exchanger.
In some embodiments of the present application, as shown in fig. 2, the start-stop of the compressor is controlled according to the heating operation time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc, and further comprising:
after the indoor fan is controlled to run at the lowest wind speed, detecting the temperature Tc of the indoor heat exchanger;
judging whether the temperature Tc of the indoor heat exchanger is not less than a second preset high temperature or judging whether the heating time of the compressor reaches a sixth preset time, for example, the sixth preset time can be 1.5 minutes;
if so, the compressor is controlled to stop running.
When the indoor environment temperature T1 is greater than the preset indoor high temperature, the indoor fan is controlled to operate at the lowest wind speed, and when the indoor heat exchanger temperature Tc is not less than the second preset high temperature or the compressor heating time reaches the sixth preset time, the indoor heat exchanger is heated sufficiently to ensure defrosting of the indoor heat exchanger, the operation of the compressor is stopped at the moment, defrosting of the indoor heat exchanger is finished, and if the compressor heating operation time does not reach the sixth preset time and the indoor heat exchanger temperature Tc does not reach the second preset high temperature, the air conditioner continues to perform heating operation until one condition that the compressor heating operation time reaches the sixth preset time or the indoor heat exchanger temperature Tc reaches the second preset high temperature is met, and defrosting cleaning and drying are completed.
The air conditioner of the present application performs a refrigerating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The electronic expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the electronic expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A self-cleaning method of an air conditioner, comprising:
starting a self-cleaning mode;
controlling a compressor to perform refrigeration operation;
detecting the temperature Tc of an indoor heat exchanger, and controlling the start and stop of an indoor fan and the flow of a refrigerant according to the temperature Tc of the indoor heat exchanger so as to frost the indoor heat exchanger;
controlling the compressor to perform heating operation so as to defrost the indoor heat exchanger and clean the indoor heat exchanger;
controlling the indoor fan to run;
and controlling the start and stop of the indoor fan and the flow of the refrigerant according to the temperature Tc of the indoor heat exchanger, comprising:
judging whether the temperature Tc of the indoor heat exchanger is smaller than a first preset low temperature or not;
if so, controlling the indoor fan to run at the lowest wind speed;
if not, closing the indoor fan, and reducing the refrigerant flow by reducing the opening of the electronic expansion valve;
if the indoor heat exchanger temperature Tc is smaller than the first preset low temperature, the indoor fan is operated for a first preset time at the lowest wind speed, then the indoor heat exchanger temperature Tc is detected again,
judging whether the temperature Tc of the indoor heat exchanger is smaller than a second preset low temperature or not;
if so, continuously maintaining the indoor fan to run at the lowest wind speed, and re-detecting the temperature Tc of the indoor heat exchanger after the first preset time until the temperature Tc of the indoor heat exchanger is more than or equal to the second preset low temperature;
otherwise, reducing the opening of the electronic expansion valve to reduce the refrigerant flow;
the second preset low temperature is greater than the first preset low temperature;
after the opening degree of the electronic expansion valve is reduced, judging whether the opening degree of the electronic expansion valve is minimum;
if so, keeping the current state of the air conditioner continuously running for a second preset time.
2. The self-cleaning method of an air conditioner according to claim 1, wherein the compressor is controlled to be operated at a maximum frequency for a third preset time before the indoor heat exchanger temperature Tc is detected.
3. The self-cleaning method of an air conditioner according to claim 1, wherein said controlling said compressor heating operation includes:
detecting heating operation time, indoor environment temperature T1 and indoor heat exchanger temperature Tc;
and controlling the start and stop of the compressor, the opening of the electronic expansion valve and the start and stop of the indoor fan according to the heating running time, the indoor environment temperature T1 and the indoor heat exchanger temperature Tc so as to defrost the indoor heat exchanger and clean the indoor heat exchanger.
4. A self-cleaning method of an air conditioner according to claim 3, wherein controlling start-stop of said compressor according to said heating operation time, said indoor environment temperature T1 and said indoor heat exchanger temperature Tc comprises:
judging whether the indoor environment temperature T1 is greater than a preset indoor temperature or not;
if so, controlling the indoor fan to run at the lowest wind speed;
if not, the indoor fan and the compressor are controlled to stop running, and the opening of the electronic expansion valve is controlled to be maximum.
5. The self-cleaning method of an air conditioner according to claim 4, wherein the start-stop of said compressor is controlled according to said heating operation time, said indoor environment temperature T1 and said indoor heat exchanger temperature Tc, further comprising:
after the compressor is controlled to stop running for a fourth preset time, controlling the compressor to perform heating running and controlling the indoor fan to run at the lowest wind speed;
detecting the temperature Tc of the indoor heat exchanger;
judging whether the temperature Tc of the indoor heat exchanger is greater than a first preset high temperature or not;
and if not, reducing the opening degree of the electronic expansion valve.
6. The self-cleaning method of an air conditioner according to claim 5, wherein the start-stop of said compressor is controlled according to said heating operation time, said indoor environment temperature T1 and said indoor heat exchanger temperature Tc, further comprising:
after the opening degree of the electronic expansion valve is reduced, judging whether the opening degree of the electronic expansion valve is minimum;
if so, judging whether the heating operation time of the compressor reaches a fifth preset time or whether the temperature Tc of the indoor heat exchanger reaches a first preset high temperature; if so, the compressor is controlled to stop running.
7. The self-cleaning method of an air conditioner according to claim 4, wherein the start-stop of said compressor is controlled according to said heating operation time, said indoor environment temperature T1 and said indoor heat exchanger temperature Tc, further comprising:
after controlling the indoor fan to run at the lowest wind speed, detecting the temperature Tc of the indoor heat exchanger;
judging whether the temperature Tc of the indoor heat exchanger is not less than a second preset high temperature or whether the heating time of the compressor reaches a sixth preset time;
if so, the compressor is controlled to stop running.
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| JPH04324048A (en) * | 1991-04-23 | 1992-11-13 | Toshiba Corp | Air conditioner |
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2021
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| JPH04324048A (en) * | 1991-04-23 | 1992-11-13 | Toshiba Corp | Air conditioner |
| CN105805892A (en) * | 2016-03-31 | 2016-07-27 | 海信（山东）空调有限公司 | Heating control method of air conditioner |
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