CN116557976A - Air conditioner and automatic cleaning control method thereof - Google Patents
Air conditioner and automatic cleaning control method thereof Download PDFInfo
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- CN116557976A CN116557976A CN202310441039.6A CN202310441039A CN116557976A CN 116557976 A CN116557976 A CN 116557976A CN 202310441039 A CN202310441039 A CN 202310441039A CN 116557976 A CN116557976 A CN 116557976A
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- air conditioner
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- heat exchanger
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- indoor heat
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- 238000004140 cleaning Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000010257 thawing Methods 0.000 claims abstract description 73
- 238000001816 cooling Methods 0.000 claims abstract description 57
- 238000005057 refrigeration Methods 0.000 claims abstract description 36
- 230000007613 environmental effect Effects 0.000 claims description 37
- 239000003507 refrigerant Substances 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 11
- 238000007791 dehumidification Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 abstract description 12
- 238000009833 condensation Methods 0.000 description 27
- 230000005494 condensation Effects 0.000 description 27
- 230000006870 function Effects 0.000 description 9
- 230000006872 improvement Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000007664 blowing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000001143 conditioned effect Effects 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
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- 238000007906 compression Methods 0.000 description 2
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate outdoor units
- F24F1/10—Arrangement or mounting thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—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
- F24F11/70—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
- F24F11/70—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
- F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
-
- 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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1413—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre using more than one tilting member, e.g. with several pivoting blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner and an automatic cleaning control method of the air conditioner, when a preset self-cleaning instruction is received, the air conditioner is controlled to operate a refrigeration mode according to a target operation parameter so as to enable an indoor heat exchanger to be condensed; when the air conditioner runs for a first preset time period, controlling the air conditioner to enter a frosting stage, and taking a second preset time period as an adjustment period, acquiring the coil temperature of the indoor heat exchanger at the initial time and the end time of the current adjustment period so as to calculate the coil cooling rate of the indoor heat exchanger; according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value, current operation parameters of the air conditioner in the next adjustment period are adjusted so as to frost the indoor heat exchanger; and when the preset frosting completion condition is met, controlling the air conditioner to enter a defrosting stage. By adopting the self-cleaning device and the self-cleaning method, the frosting efficiency of the indoor heat exchanger of the air conditioner in the self-cleaning process can be effectively improved, so that the self-cleaning efficiency is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a self-cleaning control method of the air conditioner.
Background
After the air conditioner is used for a long time, a large amount of dust and dirt enter the heat exchanger of the air conditioner, so that dust is accumulated on the heat exchanger, a large amount of bacteria can be bred on the heat exchanger, the heat exchange performance of the heat exchanger is reduced, and meanwhile, the health of a user is negatively affected, so that the heat exchanger needs to be cleaned regularly.
At present, the air conditioner achieves the cleaning effect of the evaporator by peeling off and discharging the sediments on the fins by operating the self-cleaning mode. However, the inventors found that the prior art has at least the following problems: the control logic of the self-cleaning mode of the general air conditioner only simply switches the refrigerating and heating modes of the air conditioner system to finish the frosting and defrosting processes, and the defects of poor self-cleaning effect, long self-cleaning time, high power consumption and the like are often caused by single and unreasonable parameter setting.
Disclosure of Invention
The embodiment of the invention aims to provide an air conditioner and an automatic cleaning control method of the air conditioner, which can effectively improve condensation and frosting effects of condensed water of an indoor heat exchanger of the air conditioner in a self-cleaning process, thereby improving the self-cleaning efficiency and the running efficiency.
To achieve the above object, an embodiment of the present invention provides an air conditioner, including:
A refrigerant circuit in which a refrigerant circulates sequentially through a compressor, a condenser, an expansion valve, and an evaporator, one of the condenser and the evaporator being an outdoor heat exchanger, and the other being an indoor heat exchanger;
the indoor fan is used for driving indoor air to exchange heat with the indoor heat exchanger and then sending out from the air outlet;
the outdoor fan is used for driving the outdoor air to exchange heat with the outdoor heat exchanger;
a controller for:
when a preset self-cleaning instruction is received, determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter so as to enable the indoor heat exchanger to be condensed;
when the air conditioner runs for a first preset time period, controlling the air conditioner to enter a frosting stage, and taking a second preset time period as an adjustment period, acquiring the coil temperature of the indoor heat exchanger at the initial time and the end time of the current adjustment period so as to calculate the coil cooling rate of the indoor heat exchanger;
according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value, current operation parameters of the air conditioner in the next adjustment period are adjusted so as to frost the indoor heat exchanger;
And when the preset frosting completion condition is met, controlling the air conditioner to enter a defrosting stage.
As an improvement of the above-mentioned scheme, the operation parameters of the air conditioner include an operation frequency of the compressor and an operation rotation speed of the outdoor fan;
the step of adjusting the current operation parameters of the air conditioner in the next adjustment period according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value specifically comprises the following steps:
when the cooling rate of the coil is smaller than or equal to the threshold value of the cooling rate, in the next adjustment period, the current operating frequency of the compressor is increased by a preset frequency adjustment step length, and the current operating rotating speed of the outdoor fan is increased by a preset rotating speed adjustment step length;
and when the cooling rate of the coil is larger than the threshold value of the cooling rate, maintaining the current operating frequency of the compressor and the current operating rotating speed of the outdoor fan unchanged in the next adjustment period.
As an improvement of the above-mentioned scheme, the operation parameters of the air conditioner include an operation frequency of the compressor and an operation rotation speed of the outdoor fan;
the determining the target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter so as to condense the indoor heat exchanger, specifically comprising:
Acquiring current environmental parameters; wherein the environmental parameters include indoor environmental temperature, indoor environmental humidity and outdoor environmental humidity;
determining the running frequency of the compressor and the running speed of the outdoor fan corresponding to the current environmental parameters according to the corresponding relation between the preset environmental parameters and the running frequency of the compressor and the running speed of the outdoor fan, and taking the running frequency and the running speed of the outdoor fan as a target running frequency and a target running speed respectively;
and controlling the air conditioner to enter a refrigeration mode, wherein the compressor operates according to the target operating frequency, and the outdoor fan operates according to the target operating rotating speed.
As an improvement of the scheme, the air outlet is also provided with a transverse air deflector and a longitudinal air deflector, the transverse air deflector is used for adjusting the up-down air supply direction, and the longitudinal air deflector is used for adjusting the left-right air supply direction; the operation parameters of the air conditioner further comprise swing angles of the transverse air deflector and the longitudinal air deflector;
the method for determining the target operation parameters of the air conditioner, controlling the air conditioner to operate the refrigeration mode according to the target operation parameters so as to condense the indoor heat exchanger, and further comprising:
determining an upper limit swing angle of the transverse air deflector as a first target swing angle, and determining a left limit swing angle or a right limit swing angle of the longitudinal air deflector as a second target swing angle;
And controlling the transverse air deflector to swing to the first target swing angle, and controlling the longitudinal air deflector to swing to the second target swing angle.
As an improvement of the above scheme, the preset frosting completion conditions are as follows: the temperature of a coil pipe of the indoor heat exchanger is smaller than or equal to a preset first coil pipe temperature threshold value; or the time length of the air conditioner in the frosting stage reaches a third preset time length.
As an improvement of the above scheme, the defrosting stage comprises a first defrosting stage and a second defrosting stage; when the preset frosting completion condition is met, controlling the air conditioner to enter a defrosting stage, wherein the method specifically comprises the following steps:
when the preset frosting completion condition is met, controlling the compressor and the outdoor fan to stop running;
after the compressor and the outdoor fan stop running, controlling the air conditioner to enter a first defrosting stage; wherein, the first defrosting stage adopts a natural defrosting mode of circulating air supply;
when the duration of the air conditioner in the first defrosting stage reaches a fourth preset duration, controlling the air conditioner to enter a second defrosting stage; wherein, the second defrosting stage adopts a heating defrosting mode.
As an improvement of the above scheme, in the first defrosting stage, the indoor fan starts to operate according to a preset first operation rotation speed, and the opening of the expansion valve is adjusted to a preset maximum opening;
and in the second defrosting stage, controlling the indoor fan to stop running, controlling the air conditioner to enter a heating mode, operating the compressor according to a preset running frequency, operating the outdoor fan according to a preset highest running rotating speed, and adjusting the opening of the expansion valve to a preset opening value.
As an improvement of the above-mentioned scheme, after controlling the air conditioner to enter the defrosting stage when a preset frosting completion condition is satisfied, the controller is further configured to:
when the preset defrosting completion condition is met, controlling the air conditioner to enter a drying stage; under the drying stage, controlling the compressor and the outdoor fan to stop running, controlling the indoor fan to start running according to a preset second running rotating speed, and stopping running after running for a fifth preset time period;
wherein, the defrosting completion conditions are as follows: the coil temperature of the indoor heat exchanger reaches a preset second coil temperature threshold; or, the discharge pressure of the compressor is greater than or equal to a preset pressure threshold.
As an improvement of the above solution, when a preset self-cleaning instruction is received, before the determining the target operation parameter of the air conditioner and controlling the air conditioner to operate in the cooling mode according to the target operation parameter, the controller is further configured to:
judging the current operation mode of the air conditioner; wherein, the operation mode is standby mode, air supply mode, refrigeration mode, dehumidification mode or heating mode;
when the current operation mode of the air conditioner is a standby mode or a heating mode, controlling the compressor and the outdoor fan to stop operating, controlling the indoor fan to operate at a preset third operation rotating speed, and executing the steps: determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter;
when the current operation mode of the air conditioner is an air supply mode, a refrigeration mode or a dehumidification mode, executing the steps of: and determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter.
The embodiment of the invention also provides an automatic cleaning control method of the air conditioner,
the air conditioner includes:
A refrigerant circuit in which a refrigerant circulates sequentially through a compressor, a condenser, an expansion valve, and an evaporator, one of the condenser and the evaporator being an outdoor heat exchanger, and the other being an indoor heat exchanger;
the indoor fan is used for driving indoor air to exchange heat with the indoor heat exchanger and then sending out from the air outlet;
the outdoor fan is used for driving the outdoor air to exchange heat with the outdoor heat exchanger;
the method comprises the following steps:
when a preset self-cleaning instruction is received, determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter so as to enable the indoor heat exchanger to be condensed;
when the air conditioner runs for a first preset time period, controlling the air conditioner to enter a frosting stage, and taking a second preset time period as an adjustment period, acquiring the coil temperature of the indoor heat exchanger at the initial time and the end time of the current adjustment period so as to calculate the coil cooling rate of the indoor heat exchanger;
according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value, current operation parameters of the air conditioner in the next adjustment period are adjusted so as to frost the indoor heat exchanger;
And when the preset frosting completion condition is met, controlling the air conditioner to enter a defrosting stage.
Compared with the prior art, the air conditioner and the automatic cleaning control method of the air conditioner, disclosed by the invention, have the advantages that when a preset self-cleaning instruction is received, the target operation parameters of the air conditioner are determined, and the air conditioner is controlled to operate in a refrigeration mode according to the target operation parameters so as to enable the indoor heat exchanger to be condensed; when the air conditioner runs for a first preset time period, controlling the air conditioner to enter a frosting stage, and taking a second preset time period as an adjustment period, acquiring the coil temperature of the indoor heat exchanger at the initial time and the end time of the current adjustment period so as to calculate the coil cooling rate of the indoor heat exchanger; according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value, current operation parameters of the air conditioner in the next adjustment period are adjusted so as to frost the indoor heat exchanger; and when the preset frosting completion condition is met, controlling the air conditioner to enter a defrosting stage. By adopting the technical means of the embodiment of the invention, the whole processes of the condensation stage, the frosting stage, the melting stage and the like under the self-cleaning function of the indoor heat exchanger are completed one by controlling the operation parameters of the air conditioner.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of a refrigerant circuit of a chiller according to an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of the structure of a humidifier in another embodiment of the invention;
FIG. 4 is a schematic flow chart of the first embodiment of the present invention, which is executed by the controller;
FIG. 5 is a schematic flow chart of the second embodiment of the present invention, wherein the controller performs the operation;
FIG. 6 is a schematic flow chart of the third embodiment of the present invention, which is executed by the controller;
FIG. 7 is a schematic flow chart of a fourth embodiment of the present invention, wherein the controller is configured to perform operations;
FIG. 8 is a schematic flow chart of the fifth embodiment of the present invention, which is executed by the controller;
FIG. 9 is a schematic flow chart of a sixth embodiment of the present invention of the operation performed by the controller;
fig. 10 is a schematic flow chart of an automatic cleaning control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Referring to fig. 1, a schematic structural diagram of an air conditioner according to an embodiment of the present invention is provided in an implementation manner, and an embodiment of the present invention provides an air conditioner 100, which includes an indoor unit 110 and an outdoor unit 120, where the indoor unit 110 is usually disposed indoors, and may be in a form of an indoor hanging unit, an indoor cabinet unit, or the like. The outdoor unit 120 is generally disposed outdoors for heat exchange in an indoor environment. The air conditioner 100 includes a refrigerant circuit 130, and is capable of performing a vapor compression refrigeration cycle by circulating the refrigerant in the refrigerant circuit 130, and is connected to the indoor unit 110 and the outdoor unit 120 using connection pipes to form a refrigerant circuit for the refrigerant cycle.
Referring to fig. 2, a schematic diagram of a part of a refrigerant circuit of an air conditioner according to an embodiment of the present invention is shown. The air conditioner in this application performs a refrigerating cycle of the air conditioner by using the compressor 131, the indoor heat exchanger 132, the expansion valve 133, and the outdoor heat exchanger 134. 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. Wherein the indoor heat exchanger 132 is generally provided in the indoor unit 110, the compressor 131 and the outdoor heat exchanger 134 are generally provided in the outdoor unit 120, the expansion valve 133 may be provided in the indoor unit 110 or the outdoor unit 120, the indoor heat exchanger 132 and the outdoor heat exchanger 134 function as a condenser or an evaporator, the air conditioner functions as a heater for a heating mode when the indoor heat exchanger 132 functions as a condenser, and the air conditioner functions as a cooler for a cooling mode when the indoor heat exchanger 132 functions as an evaporator.
The compressor 131 compresses the 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 expansion valve 133 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 expansion valve 133 and returns the refrigerant gas in a low temperature and low pressure state to the compressor 131. 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.
Referring to fig. 3, a schematic view of a part of the structure of the air conditioner according to another embodiment of the present invention is shown, where the housing of the indoor unit 110 includes an indoor fan 111 and an air deflector for controlling air guiding, and the air deflector includes a plurality of transverse air deflectors 112 and longitudinal air deflectors 113, in addition to an indoor heat exchanger 132. And an indoor fan 111 configured to be capable of changing an air volume when conditioned air heat-exchanged by the indoor heat exchanger is blown into the room, and an air guide plate configured to be capable of swinging a blowing direction of the conditioned air blown from the indoor fan, wherein the lateral air guide plate 112 is used for adjusting an up-down blowing direction, and the longitudinal air guide plate 113 is used for adjusting a left-right blowing direction. The outdoor unit 120 includes an outdoor fan 121 in addition to the compressor 131 and the outdoor heat exchanger 134, and the outdoor fan 121 generates an airflow of the outdoor air passing through the outdoor heat exchanger 134 to promote heat exchange between the refrigerant flowing through the heat transfer pipe and the outdoor air.
Further, the air conditioner 100 further includes a controller 140, and the controller 140 has an outdoor control device built in the outdoor unit 120 and an indoor control device built in the indoor unit 110. The outdoor control device and the indoor control device are connected by signal wires, and can mutually send/receive signals, so that the operations of information acquisition, control instruction issuing and the like of all parts of the air conditioner are realized.
In an embodiment of the present invention, referring to fig. 4, which is a schematic flow chart of a first implementation of the operation performed by the controller in the embodiment of the present invention, the controller 140 is capable of executing a control operation for completing the self-cleaning function of the indoor heat exchanger of the air conditioner in response to a preset self-cleaning instruction, and specifically includes steps S11 to S14:
s11, when a preset self-cleaning instruction is received, determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter so as to enable the indoor heat exchanger to be condensed;
s12, after the air conditioner runs for a first preset time period, controlling the air conditioner to enter a frosting stage, and taking a second preset time period as an adjustment period, acquiring the coil temperature of the indoor heat exchanger at the initial time and the end time of the current adjustment period so as to calculate the coil cooling rate of the indoor heat exchanger;
S13, according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value, current operation parameters of the air conditioner in the next adjustment period are adjusted so as to frost the indoor heat exchanger;
and S14, when a preset frosting completion condition is met, controlling the air conditioner to enter a frosting stage.
In the embodiment of the invention, the self-cleaning process of the air conditioner at least comprises a condensation stage, a frosting stage and a defrosting stage.
When the controller 140 receives a preset self-cleaning command, the air conditioner 100 is first controlled to enter a condensation stage in response to the self-cleaning command, so that enough condensation water is generated on the surface of the indoor heat exchanger 132. Specifically, in the condensation stage, target operation parameters of each component of the air conditioner are determined, the air conditioner is controlled to operate in a cooling mode in which each component of the air conditioner operates according to the determined target operation parameters, and the indoor heat exchanger 132 serves as an evaporator to generate condensation water.
When a preset condensation completion condition is satisfied, the air conditioner 100 is controlled to enter a frosting stage to frost the condensation water on the surface of the indoor heat exchanger 132. Preferably, the condensation completion condition is that the air conditioner is operated in the condensation stage for a first preset time period t1. Specifically, during the frosting stage, the second preset time period t2 is taken as an adjustment period, and during each adjustment period t2, the coil temperature of the indoor heat exchanger 132 at the initial time and the end time is collected and respectively recorded as Tp0 and Tp ', and the coil cooling rate V of the indoor heat exchanger 132 is calculated according to the coil temperatures Tp0 and Tp'.
The coil cooling rate V meets the calculation formula: v= (Tp 0-Tp')/t 2.
And then, comparing the magnitude relation between the coil cooling rate V and a preset cooling rate threshold Vn, and adjusting the current operation parameters of the air conditioner in the time period of the next adjustment period t2 according to the comparison result so as to enable the indoor heat exchanger to be frosted quickly. Furthermore, when a preset frosting completion condition is met, the air conditioner is controlled to enter a frosting stage so as to melt the frost layer on the surface of the indoor heat exchanger 132, and self-cleaning of the indoor heat exchanger 132 of the air conditioner is achieved.
It should be noted that, the preset cooling rate threshold Vn and the first preset duration t1 are preset values, and may be set and adjusted according to actual situations, which is not limited herein specifically.
By adopting the technical means of the embodiment of the invention, the whole processes of the condensation stage, the frosting stage, the melting stage and the like under the self-cleaning function of the indoor heat exchanger are completed one by controlling the operation parameters of the air conditioner.
As a preferred implementation manner, referring to fig. 5, a schematic flow chart of the second implementation manner performed by the controller in the embodiment of the present invention is further implemented on the basis of the above embodiment, where the operation parameters of the air conditioner include the operation frequency of the compressor 131 and the operation rotation speed of the outdoor fan 121;
step S13, namely, adjusting the current operation parameters of the air conditioner in the next adjustment period according to the comparison relation between the coil cooling rate and the preset cooling rate threshold, specifically includes steps S131 and S132:
s131, when the cooling rate of the coil is smaller than or equal to the threshold value of the cooling rate, in the next adjustment period, the current operating frequency of the compressor is increased by a preset frequency adjustment step length, and the current operating rotating speed of the outdoor fan is increased by a preset rotating speed adjustment step length;
and S132, when the cooling rate of the coil is greater than the threshold value of the cooling rate, maintaining the current operating frequency of the compressor and the current operating rotating speed of the outdoor fan unchanged in the next adjustment period.
In the embodiment of the present invention, in the condensation stage, the compressor 131 and the outdoor fan 121 are controlled to operate at a corresponding target operating frequency and a target operating rotation speed, after the compressor operates for a first preset period t1, the frosting stage is entered, at this time, the compressor first maintains the original operating frequency, a coil cooling rate V is calculated and obtained in a preset adjustment period t2, the coil cooling rate V is compared with a preset cooling rate threshold Vn in magnitude relation, and when V is less than or equal to Vn, the current operating frequency f of the compressor 131 is increased by a preset frequency adjustment step Δf in the next adjustment period t2, that is, f=f+ [ delta ] f, for example, the operating frequency gear of the compressor is increased by one gear; meanwhile, the current operation speed r of the outdoor fan 121 is increased by a preset speed adjustment step Δr, that is, r=r+Δr, for example, the operation speed gear of the outdoor fan is increased by one gear until the operation frequency of the compressor 131 reaches the preset highest gear, and the operation speed of the outdoor fan 121 reaches the highest gear of the remainder. When V > Vn is satisfied, the compressor 131 maintains the operation frequency f of the previous cycle unchanged and the outdoor fan 121 maintains the operation rotation speed r of the previous cycle unchanged for the duration of the next adjustment cycle t 2.
It should be noted that, the preset frequency adjustment step Δf, the preset rotation speed adjustment step Δr, and the second preset time period t2 are all preset values, and may be set and adjusted according to actual situations, which is not specifically limited herein.
By adopting the technical means of the embodiment of the invention, the frosting state of the indoor heat exchanger is judged according to the change trend of the coil temperature of the indoor heat exchanger, so that the running frequency of the compressor and the running rotating speed of the outdoor fan are adjusted, the frosting efficiency of the indoor heat exchanger is improved, and the energy-saving control of frosting is realized.
As a preferred implementation manner, referring to fig. 6, a schematic flow chart of a third implementation manner of the operation performed by the controller in the embodiment of the present invention is further implemented on the basis of any one of the foregoing embodiments, in the embodiment of the present invention, in step S11, that is, the target operation parameter of the air conditioner is determined, and the air conditioner is controlled to operate in a refrigeration mode according to the target operation parameter, so as to condensate the indoor heat exchanger, which specifically includes steps S111 to S113:
s111, acquiring current environmental parameters; wherein the environmental parameters include indoor environmental temperature, indoor environmental humidity and outdoor environmental humidity;
S112, determining the operation frequency of the compressor and the operation rotating speed of the outdoor fan corresponding to the current environmental parameters according to the corresponding relation between the preset environmental parameters and the operation frequency of the compressor and the operation rotating speed of the outdoor fan, and taking the operation frequency and the operation rotating speed of the outdoor fan as a target operation frequency and a target operation rotating speed respectively;
s113, controlling the air conditioner to enter a refrigeration mode, wherein the compressor operates according to the target operating frequency, and the outdoor fan operates according to the target operating rotating speed.
In the embodiment of the present invention, in the condensation stage, the operation parameter control of the air conditioner includes the operation frequency of the compressor 131 and the operation rotation speed control of the outdoor fan 121, and the corresponding relationship between three environmental parameters, i.e., the indoor environmental temperature Tn, the indoor environmental humidity Hn, and the outdoor environmental humidity Tw, and the operation frequency f of the compressor 131 and/or the operation rotation speed r of the outdoor fan 121 is pre-established, so as to implement the operation control of the compressor and the outdoor fan.
Further, after receiving the self-cleaning instruction, the current environmental parameters including the indoor environmental temperature Tn, the indoor environmental humidity Hn and the outdoor environmental humidity Tw are collected, the operation frequency f of the compressor 131 and the operation rotation speed r of the outdoor fan 121 are determined according to the indoor environmental temperature Tn, the indoor environmental humidity Hn and the outdoor environmental humidity Tw, the air conditioner is controlled to enter a cooling mode, and the compressor 131 and the outdoor fan 121 are operated according to the determined operation parameters.
It should be noted that, the principle of selecting the operation frequency f of the compressor is as follows: the outdoor environment temperature is used for determining a reference operating frequency in a reference temperature interval, and the operating frequency is lower when the deviation from the reference temperature interval is larger; the lower the indoor environment humidity at the same indoor temperature, the higher the operating frequency.
As an example, the values of three environmental parameters, i.e., the indoor environmental temperature Tn, the indoor environmental humidity Hn, and the outdoor environmental humidity Tw, and the operating frequency f of the compressor 131 are as shown in table 1:
TABLE 1
It will be appreciated that the numerical values in table 1 are merely examples, and in practical applications, the numerical values may be adjusted and set according to practical situations, without affecting the beneficial effects obtained by the present invention.
It should be noted that, the principle of selecting the running rotation speed r of the outdoor fan is as follows: the outdoor environment temperature is used for determining a reference running rotating speed in a reference temperature interval, and the larger the deviation from the reference temperature interval is, the lower the running rotating speed is; the lower the indoor environment humidity is, the higher the running rotation speed is at the same indoor temperature.
By adopting the technical means of the embodiment of the invention, the control strategy of the air conditioner in the condensation stage is improved, and the optimization adjustment of the operation parameters of the air conditioner in the refrigeration mode is realized according to the real-time environment working condition, so that enough condensation water is quickly generated by the indoor heat exchanger, the condensation efficiency of the indoor heat exchanger is improved, and the self-cleaning efficiency is improved.
As a preferred embodiment, the operation parameters of the air conditioner further include swing angles of the transverse air deflector 112 and the longitudinal air deflector 113;
step S11, that is, the determining the target operation parameter of the air conditioner, and controlling the air conditioner to operate the refrigeration mode according to the target operation parameter, so as to condense the indoor heat exchanger, further includes steps S114 and S115:
s114, determining an upper limit swing angle of the transverse air deflector as a first target swing angle, and determining a left limit swing angle or a right limit swing angle of the longitudinal air deflector as a second target swing angle;
s115, controlling the transverse air deflector to swing to the first target swing angle, and controlling the longitudinal air deflector to swing to the second target swing angle.
In the embodiment of the present invention, after receiving the self-cleaning instruction, the condensation stage is entered, the transverse air deflector 112 is controlled to be placed at an upper limit swing angle, that is, a horizontal upper limit minimum angle and fixed, and the longitudinal air deflector 113 is controlled to be placed at a left limit swing angle or a right limit swing angle, that is, to be swung to a left or right limit minimum angle and fixed, and the compressor 131 and the outdoor fan 121 are controlled to perform a cooling operation according to the control strategy of the above embodiment.
The left limit swing angle, the right limit swing angle and the upper limit swing angle of the air deflector are all preset values, and can be set and adjusted according to actual conditions, and are not particularly limited herein.
By adopting the technical means of the embodiment of the invention, the swing angle of the air deflector can be adjusted, so that enough condensation water can be generated on the surface of the indoor heat exchanger, preparation is made for subsequent frosting, and the self-cleaning efficiency is improved.
As a preferred embodiment, referring to fig. 7, a schematic flow chart of the fourth embodiment of the operation performed by the controller in the embodiment of the present invention is implemented on the basis of any one of the above embodiments, and in step S14, the preset frosting completion condition is: the coil temperature Tp of the indoor heat exchanger is smaller than or equal to a preset first coil temperature threshold Tp1; or the time length of the air conditioner in the frosting stage reaches a third preset time length.
In the embodiment of the invention, when the coil temperature of the indoor heat exchanger meets Tp less than or equal to Tp1, or the time length of the air conditioner in the frosting stage reaches a third preset time length t3, namely, the air conditioner starts to enter the frosting stage, and the running time of the compressor reaches the third preset time length t3, the indoor heat exchanger is considered to be out of the frosting stage and enter the frosting stage when the frosting completion condition is met currently.
It should be noted that, the preset first coil temperature threshold Tp1 and the third preset time period t3 are preset values, and may be set and adjusted according to actual situations, which is not limited herein specifically.
Preferably, the defrosting stage comprises a first defrosting stage and a second defrosting stage, wherein the first defrosting stage adopts a natural defrosting mode of circulating air supply, and the second defrosting stage adopts a heating defrosting mode.
Step S14, namely, when the preset frost formation completion condition is met, controls the air conditioner to enter a defrosting stage, specifically includes steps S141 to S143:
s141, when a preset frosting completion condition is met, controlling the compressor and the outdoor fan to stop running;
s142, after the compressor and the outdoor fan stop running, controlling the air conditioner to enter a first defrosting stage;
s143, controlling the air conditioner to enter a second defrosting stage when the duration of the air conditioner in the first defrosting stage reaches a fourth preset duration.
Specifically, when the indoor heat exchanger enters the defrosting stage, the compressor 131 and the outdoor fan 121 are controlled to stop running, and then the air conditioner is controlled to enter the first defrosting stage, namely, the defrosting layer of the indoor heat exchanger is melted in a natural defrosting mode of circulating air supply.
Preferably, in the first defrosting stage, the indoor fan 111 starts to operate at a preset first operation rotation speed, and the opening of the expansion valve 133 is adjusted to a preset maximum opening. For example, the operation speed of the indoor fan 111 is adjusted to the first operation speed and continuously operated for a fourth preset period t4, for example, 60 minutes, the opening adjustment value of the expansion valve 133 is maximum and fixed, and at the same time, the transverse air deflector 112 maintains the upper limit swing angle, that is, the angle of not blowing up the person, and at this time, the indoor heat exchanger is in the natural defrosting state under the circulating air supply.
It should be noted that, the preset first running speed, the preset maximum opening degree, and the fourth preset time period t4 are all preset values, and may be set and adjusted according to actual situations, which are not specifically limited herein.
By adopting the technical means of the embodiment of the invention, the control strategy of the air conditioner in the defrosting stage is improved, and after the indoor heat exchanger is frosted, a heating defrosting mode is not adopted immediately, and the air supply mode is adopted to defrost, so that the indoor heat exchanger can naturally defrost at the ambient temperature, the phenomenon that a large amount of hot air flow generated by the instant heating defrosting blows out the cold air to generate condensation water drops is avoided, and the use experience of users is improved.
Further, after the fourth preset time period t4, the first defrosting stage is finished, and the air conditioner is controlled to enter the second defrosting stage, namely, a heating defrosting mode is adopted to melt the frost layer of the indoor heat exchanger.
Preferably, in the second defrosting stage, the indoor fan is controlled to stop running, the air conditioner is controlled to enter a heating mode, the compressor is operated according to a preset running frequency, the outdoor fan is operated according to a preset highest running rotating speed, and the opening of the expansion valve is adjusted to a preset opening value until the second defrosting stage is finished.
The preset operating frequency, the preset opening value and the preset maximum operating rotation speed are all preset values, and can be set and adjusted according to actual conditions, and are not particularly limited herein.
By adopting the technical means of the embodiment of the invention, after defrosting of the indoor heat exchanger in an air supply state, the room temperature gradually rises, and the residual frost of the indoor heat exchanger is quickly melted and discharged through the quick heating hot air, so that the effect of removing dirt on the surface of the heat exchanger is achieved, and the phenomenon that hot air meets condensation is avoided because the indoor fan is closed and the time is short.
As a preferred embodiment, referring to fig. 8, a schematic flow chart of a fifth embodiment of the present invention performed by the controller is further implemented on the basis of the foregoing embodiment, where the self-cleaning process of the air conditioner includes a drying stage in addition to a condensation stage, a frosting stage and a defrosting stage.
Then in step S14, that is, after controlling the air conditioner to enter the defrosting stage when a preset frosting completion condition is satisfied, the controller is further configured to perform step S15:
s15, when a preset defrosting completion condition is met, controlling the air conditioner to enter a drying stage; under the drying stage, controlling the compressor and the outdoor fan to stop running, controlling the indoor fan to start running according to a preset second running rotating speed, and stopping running after running for a fifth preset time period;
wherein, the defrosting completion conditions are as follows: the coil temperature of the indoor heat exchanger reaches a preset second coil temperature threshold Tp2; or, the exhaust pressure of the compressor is greater than or equal to a preset pressure threshold PA1.
In the embodiment of the invention, when the coil temperature of the indoor heat exchanger 132 meets Tp not less than Tp2 or the exhaust pressure PA of the exhaust outlet of the compressor 131 is not less than PA1, the defrosting completion condition is considered to be met currently, and the indoor heat exchanger exits from the defrosting stage to enter into the drying stage.
When the air conditioner enters the drying stage, the compressor 131 and the outdoor fan 121 are controlled to stop running, the indoor fan 111 is controlled to start running at the second running rotation speed, and is closed after the fifth preset time t5 is running, the whole air conditioner is restored to the standby state or the running state before self-cleaning, at the moment, the air supply drying stage is completed, and the whole self-cleaning process is finished.
It should be noted that, the preset second coil temperature threshold Tp2, the preset pressure threshold PA1, and the fifth preset time period t5 are all preset values, and may be set and adjusted according to actual situations, which is not specifically limited herein.
By adopting the technical means of the embodiment of the invention, after the indoor heat exchanger is defrosted by high-temperature hot gas, the indoor fan is started to naturally cool and dry the indoor heat exchanger, thereby being beneficial to reducing the temperature of the heat exchanger and the pressure of a refrigerating system, reducing the load of restarting operation and shortening the starting time interval.
As a preferred implementation manner, referring to fig. 9, which is a schematic flow chart of a sixth implementation manner performed by the controller in the embodiment of the present invention, the embodiment of the present invention is further implemented on the basis of the foregoing embodiment, in the embodiment of the present invention, when a preset self-cleaning instruction is received, in step S11, that is, before the determining the target operating parameter of the air conditioner and controlling the air conditioner to operate in the refrigeration mode according to the target operating parameter, the controller is further configured to perform the steps of:
Judging the current operation mode of the air conditioner; wherein, the operation mode is standby mode, air supply mode, refrigeration mode, dehumidification mode or heating mode;
when the current operation mode of the air conditioner is a standby mode or a heating mode, controlling the compressor and the outdoor fan to stop operating, controlling the indoor fan to operate at a preset third operation rotating speed, and executing the steps: determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter;
when the current operation mode of the air conditioner is an air supply mode, a refrigeration mode or a dehumidification mode, executing the steps of: and determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter.
In the embodiment of the present invention, when the controller 140 of the air conditioner receives the self-cleaning instruction, the operation mode of the air conditioner is first determined. Two situations are distinguished:
when the current operation mode of the air conditioner is the standby mode or the heating mode, the compressor 131 and the outdoor fan 121 are controlled to stop operation, the indoor fan 111 is controlled to start operation for a certain period of time according to the preset third operation rotation speed, then the air conditioner enters the condensation stage, and the target operation parameters of the air conditioner in the cooling mode are determined.
When the current operation mode of the air conditioner is an air supply mode, a refrigeration mode or a dehumidification mode, the indoor fan does not need to wait for a period of time to operate at a third operation rotating speed, the air conditioner directly enters a condensation stage, the target operation parameters of the air conditioner entering the refrigeration mode are determined, and the air conditioner sequentially enters a frosting stage, a defrosting stage and a drying stage, so that the whole self-cleaning process is completed.
Preferably, when the air conditioner enters the frosting state, the indoor fan 111 is controlled to stop running, and then the running states of the compressor and the outdoor fan are controlled according to the temperature change of the coil pipe of the indoor heat exchanger.
By adopting the technical means of the embodiment of the invention, when the self-cleaning instruction is received, if the current running mode of the air conditioner is the standby mode or the heating mode, the indoor fan is started to run for a certain period of time, and the accuracy of collecting the environmental parameters can be improved, so that the self-cleaning effect is improved.
Referring to fig. 10, a schematic flow chart of an automatic cleaning control method of an air conditioner according to an embodiment of the present invention is provided, and the embodiment of the present invention further provides an automatic cleaning control method of an air conditioner, which is applied to an air conditioner, where the air conditioner includes an indoor unit, and an indoor heat exchanger is disposed inside the indoor unit;
The method comprises steps S21 to S24:
s21, when a preset self-cleaning instruction is received, determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter so as to enable the indoor heat exchanger to be condensed;
s22, after the air conditioner runs for a first preset time period, controlling the air conditioner to enter a frosting stage, and taking a second preset time period as an adjustment period, acquiring the coil temperature of the indoor heat exchanger at the initial time and the end time of the current adjustment period so as to calculate the coil cooling rate of the indoor heat exchanger;
s23, according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value, current operation parameters of the air conditioner in the next adjustment period are adjusted so as to frost the indoor heat exchanger;
and S24, when a preset frosting completion condition is met, controlling the air conditioner to enter a frosting stage.
By adopting the technical means of the embodiment of the invention, the whole processes of the condensation stage, the frosting stage, the melting stage and the like under the self-cleaning function of the indoor heat exchanger are completed one by controlling the operation parameters of the air conditioner.
It should be noted that, the method for controlling the automatic cleaning of the air conditioner according to the embodiment of the present invention is the same as all the steps of the flow executed by the controller of the air conditioner according to the above embodiment, and the working principles and beneficial effects of the two are in one-to-one correspondence, so that the description is omitted.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored on a computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or the like.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (10)
1. An air conditioner, comprising:
a refrigerant circuit in which a refrigerant circulates sequentially through a compressor, a condenser, an expansion valve, and an evaporator, one of the condenser and the evaporator being an outdoor heat exchanger, and the other being an indoor heat exchanger;
The indoor fan is used for driving indoor air to exchange heat with the indoor heat exchanger and then sending out from the air outlet;
the outdoor fan is used for driving the outdoor air to exchange heat with the outdoor heat exchanger;
a controller for:
when a preset self-cleaning instruction is received, determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter so as to enable the indoor heat exchanger to be condensed;
when the air conditioner runs for a first preset time period, controlling the air conditioner to enter a frosting stage, and taking a second preset time period as an adjustment period, acquiring the coil temperature of the indoor heat exchanger at the initial time and the end time of the current adjustment period so as to calculate the coil cooling rate of the indoor heat exchanger;
according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value, current operation parameters of the air conditioner in the next adjustment period are adjusted so as to frost the indoor heat exchanger;
and when the preset frosting completion condition is met, controlling the air conditioner to enter a defrosting stage.
2. The air conditioner of claim 1, wherein the operation parameters of the air conditioner include an operation frequency of the compressor and an operation rotation speed of the outdoor fan;
The step of adjusting the current operation parameters of the air conditioner in the next adjustment period according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value specifically comprises the following steps:
when the cooling rate of the coil is smaller than or equal to the threshold value of the cooling rate, in the next adjustment period, the current operating frequency of the compressor is increased by a preset frequency adjustment step length, and the current operating rotating speed of the outdoor fan is increased by a preset rotating speed adjustment step length;
and when the cooling rate of the coil is larger than the threshold value of the cooling rate, maintaining the current operating frequency of the compressor and the current operating rotating speed of the outdoor fan unchanged in the next adjustment period.
3. The air conditioner of claim 1, wherein the operation parameters of the air conditioner include an operation frequency of the compressor and an operation rotation speed of the outdoor fan;
the determining the target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter so as to condense the indoor heat exchanger, specifically comprising:
acquiring current environmental parameters; wherein the environmental parameters include indoor environmental temperature, indoor environmental humidity and outdoor environmental humidity;
Determining the running frequency of the compressor and the running speed of the outdoor fan corresponding to the current environmental parameters according to the corresponding relation between the preset environmental parameters and the running frequency of the compressor and the running speed of the outdoor fan, and taking the running frequency and the running speed of the outdoor fan as a target running frequency and a target running speed respectively;
and controlling the air conditioner to enter a refrigeration mode, wherein the compressor operates according to the target operating frequency, and the outdoor fan operates according to the target operating rotating speed.
4. The air conditioner of claim 3, wherein a transverse air deflector and a longitudinal air deflector are arranged at the air outlet, the transverse air deflector is used for adjusting the up-down air supply direction, and the longitudinal air deflector is used for adjusting the left-right air supply direction; the operation parameters of the air conditioner further comprise swing angles of the transverse air deflector and the longitudinal air deflector;
the method for determining the target operation parameters of the air conditioner, controlling the air conditioner to operate the refrigeration mode according to the target operation parameters so as to condense the indoor heat exchanger, and further comprising:
determining an upper limit swing angle of the transverse air deflector as a first target swing angle, and determining a left limit swing angle or a right limit swing angle of the longitudinal air deflector as a second target swing angle;
And controlling the transverse air deflector to swing to the first target swing angle, and controlling the longitudinal air deflector to swing to the second target swing angle.
5. The air conditioner as set forth in claim 1, wherein the preset frosting completion condition is: the temperature of a coil pipe of the indoor heat exchanger is smaller than or equal to a preset first coil pipe temperature threshold value; or the time length of the air conditioner in the frosting stage reaches a third preset time length.
6. The air conditioner of claim 2, wherein the defrosting stage includes a first defrosting stage and a second defrosting stage; when the preset frosting completion condition is met, controlling the air conditioner to enter a defrosting stage, wherein the method specifically comprises the following steps:
when the preset frosting completion condition is met, controlling the compressor and the outdoor fan to stop running;
after the compressor and the outdoor fan stop running, controlling the air conditioner to enter a first defrosting stage; wherein, the first defrosting stage adopts a natural defrosting mode of circulating air supply;
when the duration of the air conditioner in the first defrosting stage reaches a fourth preset duration, controlling the air conditioner to enter a second defrosting stage; wherein, the second defrosting stage adopts a heating defrosting mode.
7. The air conditioner of claim 6, wherein in the first defrosting stage, the indoor fan starts to operate according to a preset first operation rotation speed, and the opening of the expansion valve is adjusted to a preset maximum opening;
and in the second defrosting stage, controlling the indoor fan to stop running, controlling the air conditioner to enter a heating mode, operating the compressor according to a preset running frequency, operating the outdoor fan according to a preset highest running rotating speed, and adjusting the opening of the expansion valve to a preset opening value.
8. The air conditioner of claim 7, wherein the controller is further configured to, after controlling the air conditioner to enter the defrosting stage when a preset frosting completion condition is satisfied:
when the preset defrosting completion condition is met, controlling the air conditioner to enter a drying stage; under the drying stage, controlling the compressor and the outdoor fan to stop running, controlling the indoor fan to start running according to a preset second running rotating speed, and stopping running after running for a fifth preset time period;
wherein, the defrosting completion conditions are as follows: the coil temperature of the indoor heat exchanger reaches a preset second coil temperature threshold; or, the discharge pressure of the compressor is greater than or equal to a preset pressure threshold.
9. An air conditioner according to claim 3, wherein,
when a preset self-cleaning instruction is received, before the target operation parameter of the air conditioner is determined and the air conditioner is controlled to operate in a refrigeration mode according to the target operation parameter, the controller is further configured to:
judging the current operation mode of the air conditioner; wherein, the operation mode is standby mode, air supply mode, refrigeration mode, dehumidification mode or heating mode;
when the current operation mode of the air conditioner is a standby mode or a heating mode, controlling the compressor and the outdoor fan to stop operating, controlling the indoor fan to operate at a preset third operation rotating speed, and executing the steps: determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter;
when the current operation mode of the air conditioner is an air supply mode, a refrigeration mode or a dehumidification mode, executing the steps of: and determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter.
10. An automatic cleaning control method of an air conditioner, characterized in that the air conditioner comprises:
A refrigerant circuit in which a refrigerant circulates sequentially through a compressor, a condenser, an expansion valve, and an evaporator, one of the condenser and the evaporator being an outdoor heat exchanger, and the other being an indoor heat exchanger;
the indoor fan is used for driving indoor air to exchange heat with the indoor heat exchanger and then sending out from the air outlet;
the outdoor fan is used for driving the outdoor air to exchange heat with the outdoor heat exchanger;
the method comprises the following steps:
when a preset self-cleaning instruction is received, determining a target operation parameter of the air conditioner, and controlling the air conditioner to operate a refrigeration mode according to the target operation parameter so as to enable the indoor heat exchanger to be condensed;
when the air conditioner runs for a first preset time period, controlling the air conditioner to enter a frosting stage, and taking a second preset time period as an adjustment period, acquiring the coil temperature of the indoor heat exchanger at the initial time and the end time of the current adjustment period so as to calculate the coil cooling rate of the indoor heat exchanger;
according to the comparison relation between the coil cooling rate and a preset cooling rate threshold value, current operation parameters of the air conditioner in the next adjustment period are adjusted so as to frost the indoor heat exchanger;
And when the preset frosting completion condition is met, controlling the air conditioner to enter a defrosting stage.
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| CN202310441039.6A CN116557976A (en) | 2023-04-21 | 2023-04-21 | Air conditioner and automatic cleaning control method thereof |
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| CN202310441039.6A CN116557976A (en) | 2023-04-21 | 2023-04-21 | Air conditioner and automatic cleaning control method thereof |
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