CN111121243B - Control method and device for air conditioner mute, storage medium and air conditioner - Google Patents
Control method and device for air conditioner mute, storage medium and air conditioner Download PDFInfo
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- CN111121243B CN111121243B CN201911378574.1A CN201911378574A CN111121243B CN 111121243 B CN111121243 B CN 111121243B CN 201911378574 A CN201911378574 A CN 201911378574A CN 111121243 B CN111121243 B CN 111121243B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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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
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
- F24F2120/12—Position of occupants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- 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
Abstract
The invention discloses a control method and device for air conditioner silence, a storage medium and an air conditioner, wherein the control method comprises the following steps: when the air conditioner is started in a mute mode, controlling a compressor of the air conditioner to run at a preset first target frequency through an outdoor controller; controlling the upper solenoid valve by an indoor controller such that the upper refrigerant passage is in a closed state, and the refrigerant flows into the lower evaporator through the liquid separator; controlling the cross-flow fan to run at a preset first target rotating speed through the indoor controller, and controlling the centrifugal fan to stop running; and detecting the temperature of a lower coil of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the lower coil. The invention can effectively reduce the noise of the air conditioner on the basis of maintaining the indoor temperature and humidity requirements, thereby improving the comfort and improving the user experience.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for controlling the mute of an air conditioner, a computer readable storage medium and the air conditioner.
Background
At present, the air conditioners in the market generally have two types, one type is a centrifugal fan, and the air conditioner adopting the centrifugal fan has higher noise when the centrifugal fan runs; one is a cross flow fan, the noise of the air conditioner adopting the cross flow fan is lower than that of a centrifugal fan, but because the static pressure of the cross flow fan is smaller, the air supply distance during operation is smaller than that of the centrifugal fan, and cold air or hot air output by the air conditioner cannot be blown to a far position, so that the comfort is poor; in addition, when the air conditioner is in a mute mode, the frequency of the compressor is low, the whole indoor evaporator of the air conditioner participates in heat exchange, the evaporation temperature is high, no dehumidification is carried out, and when the indoor environment humidity is high, the user experience is poor.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a method and an apparatus for controlling muting an air conditioner, a computer-readable storage medium, and an air conditioner, which can effectively reduce noise of the air conditioner on the basis of maintaining indoor temperature and humidity requirements, thereby improving comfort and improving user experience.
In order to solve the technical problem, an embodiment of the present invention provides a method for controlling muting of an air conditioner, the method is applicable to an air conditioner with two air outlets arranged longitudinally, an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet respectively correspond to separate air ducts, a centrifugal fan is adopted in the upper air duct, and a cross-flow fan is adopted in the lower air duct; the evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid separator, the upper evaporator corresponds to the upper air outlet, and the lower evaporator corresponds to the lower air outlet; the lower evaporator is provided with a lower coil temperature sensor; an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid distributor and used for controlling the circulation and closing of the upper refrigerant channel; the method comprises the following steps:
when the air conditioner is started in a mute mode, controlling a compressor of the air conditioner to run at a preset first target frequency through an outdoor controller;
controlling the upper solenoid valve by an indoor controller such that the upper refrigerant passage is in a closed state, and the refrigerant flows into the lower evaporator through the liquid separator;
controlling the cross-flow fan to run at a preset first target rotating speed through the indoor controller, and controlling the centrifugal fan to stop running;
and detecting the temperature of a lower coil of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the lower coil.
Further, a lower electromagnetic valve is arranged in a lower refrigerant channel between the lower evaporator and the liquid distributor, and the lower electromagnetic valve is used for controlling the circulation and closing of the lower refrigerant channel.
Further, the air conditioner is also provided with a position sensor; the position sensor is used for detecting the distance between the indoor human body position and the air conditioner.
Further, the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance is smaller than a preset first distance threshold value, controlling the compressor to operate at the first target frequency through the outdoor controller;
controlling the upper solenoid valve by the indoor controller such that the upper refrigerant passage is in a closed state, and the refrigerant flows into the lower evaporator through the liquid separator;
controlling the cross-flow fan to operate at the first target rotating speed through the indoor controller, and controlling the centrifugal fan to stop rotating;
and detecting the temperature of a lower coil of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the lower coil.
Further, the upper evaporator is provided with an upper coil temperature sensor; the upper coil temperature sensor is used for detecting the upper coil temperature of the upper evaporator.
Further, the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance is not less than a preset second distance threshold value, controlling the compressor to operate at a preset second target frequency through the outdoor controller; wherein the second distance threshold is greater than a preset first distance threshold;
controlling the lower solenoid valve by the indoor controller such that the lower refrigerant passage is in a closed state and the refrigerant flows into the upper evaporator through the liquid separator;
controlling the centrifugal fan to operate at a preset second target rotating speed through the indoor controller, and controlling the cross-flow fan to stop rotating;
and detecting the temperature of an upper coil of the upper evaporator through the upper coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the upper coil.
Further, the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance at least comprises a first distance, a second distance and a third distance, the first distance is smaller than a preset first distance threshold, the second distance is not smaller than the first distance threshold and is smaller than a preset second distance threshold, and the third distance is not smaller than the second distance threshold, the outdoor controller controls the compressor to operate at the first target frequency;
controlling the upper solenoid valve and the lower solenoid valve by the indoor controller such that the upper refrigerant passage and the lower refrigerant passage are in a circulation state, and the refrigerant flows into the upper evaporator and the lower evaporator through the liquid separator, respectively;
and controlling the cross-flow fan to operate at the first target rotating speed through the indoor controller, and controlling the centrifugal fan to operate at a preset second target rotating speed.
In order to solve the technical problem, an embodiment of the present invention further provides a control device for muting an air conditioner, wherein the device is installed in an air conditioner with two air outlets arranged longitudinally, an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet respectively correspond to separate air ducts, a centrifugal fan is adopted in the upper air duct, and a cross-flow fan is adopted in the lower air duct; the evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid separator, the upper evaporator corresponds to the upper air outlet, and the lower evaporator corresponds to the lower air outlet; the lower evaporator is provided with a lower coil temperature sensor; an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid distributor and used for controlling the circulation and closing of the upper refrigerant channel; the device comprises:
the compressor control module is used for controlling a compressor of the air conditioner to run at a preset first target frequency through an outdoor controller when the air conditioner starts a mute mode;
an upper solenoid valve control module for controlling the upper solenoid valve through an indoor controller so that the upper refrigerant passage is in a closed state and the refrigerant flows into the lower evaporator through the liquid separator;
the fan control module is used for controlling the cross-flow fan to run at a preset first target rotating speed through the indoor controller and controlling the centrifugal fan to stop running;
and the lower coil temperature detection module is used for detecting the lower coil temperature of the lower evaporator through the lower coil temperature sensor so that the outdoor controller adjusts the working frequency of the compressor according to the lower coil temperature.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program; wherein the computer program, when running, controls the device where the computer readable storage medium is located to execute any one of the above-mentioned methods for controlling muting of an air conditioner.
An embodiment of the present invention further provides an air conditioner, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor implements the control method for muting the air conditioner according to any one of the above descriptions when executing the computer program.
Compared with the prior art, the embodiment of the invention provides a control method and a device for muting an air conditioner, a computer readable storage medium and the air conditioner, wherein the air conditioner is longitudinally provided with two air outlets, an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet respectively correspond to separate air ducts, a centrifugal fan is adopted in the upper air duct, a cross-flow fan is adopted in the lower air duct, an evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid distributor, the upper evaporator corresponds to the upper air outlet, the lower evaporator corresponds to the lower air outlet, the lower evaporator is provided with a lower coil temperature sensor, an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid distributor, and the upper electromagnetic valve is used for controlling the circulation and the closing of the upper refrigerant channel; when the air conditioner is in a silent mode, the compressor of the air conditioner is controlled to run at a preset first target frequency through the outdoor controller, the upper electromagnetic valve is controlled through the indoor controller, so that the upper refrigerant channel is in a closed state, the refrigerant flows into the lower evaporator through the liquid distributor, the cross-flow fan is controlled to run at a preset first target rotating speed through the indoor controller, the centrifugal fan is controlled to stop running, the lower coil temperature of the lower evaporator is detected through the lower coil temperature sensor, the working frequency of the compressor is adjusted by the outdoor controller according to the lower coil temperature, on the basis of maintaining the indoor temperature and humidity requirements, the noise of the air conditioner is effectively reduced, the comfort is improved, and the user experience is improved.
Drawings
Fig. 1 is a flowchart of a mute control method for an air conditioner according to a preferred embodiment of the present invention;
FIG. 2 is a schematic external view of an air conditioner according to a preferred embodiment of the present invention;
fig. 3 is a schematic structural diagram of an air outlet of an air conditioner according to a preferred embodiment of the present invention;
fig. 4A to 4C are schematic structural views of an evaporator of an air conditioner according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an internal structure of an air conditioner according to an embodiment of the present invention;
fig. 6 is a block diagram of a mute control apparatus for an air conditioner according to a preferred embodiment of the present invention;
fig. 7 is a block diagram of an air conditioner according to a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
The embodiment of the invention provides a control method for muting an air conditioner, which is suitable for the air conditioner with two air outlets longitudinally, wherein an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet respectively correspond to separate air channels, a centrifugal fan is adopted in the upper air channel, and a cross-flow fan is adopted in the lower air channel; the evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid separator, the upper evaporator corresponds to the upper air outlet, and the lower evaporator corresponds to the lower air outlet; the lower evaporator is provided with a lower coil temperature sensor; an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid distributor and used for controlling the circulation and closing of the upper refrigerant channel; the method includes steps S11 to S14:
step S11, when the air conditioner starts a mute mode, controlling a compressor of the air conditioner to run at a preset first target frequency through an outdoor controller;
step S12, controlling the upper solenoid valve by an indoor controller so that the upper refrigerant passage is in a closed state and the refrigerant flows into the lower evaporator through the liquid separator;
step S13, controlling the cross-flow fan to run at a preset first target rotating speed through the indoor controller, and controlling the centrifugal fan to stop running;
and step S14, detecting the temperature of a lower coil of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the lower coil.
As shown in fig. 2 and 3, two air outlets, namely, an upper air outlet and a lower air outlet, are longitudinally disposed on an air conditioner (e.g., a vertical or cabinet air conditioner), wherein the upper air outlet is disposed at the top of the air conditioner (higher in position) and can rotate at any angle within 360 ° to supply air or supply air to a fixed position, the lower air outlet is disposed in the middle of the air conditioner (lower in position but cannot be disposed at the bottom of the air conditioner, limited by installation conditions, the bottom of the air conditioner may be blocked by furniture such as a sofa or a television cabinet, etc., to influence the air outlet of the lower air outlet), the upper air outlet and the lower air outlet respectively correspond to separate air ducts, an intermediate partition is used to separate the upper air duct from the lower air duct to prevent air cross-flow between the two air ducts, a centrifugal fan is used in the upper air duct, a cross-flow fan is used in the lower air duct, the upper air deflector of, thereby realizing various combined air outlet forms; as shown in fig. 4 to 5, the evaporator body of the air conditioner is designed as an integral body, and is divided into an upper evaporator and a lower evaporator by a liquid separator, the upper evaporator corresponds to the upper air outlet, the lower evaporator corresponds to the lower air outlet, and correspondingly, the refrigerant channel of the evaporator is also divided into an upper refrigerant channel and a lower refrigerant channel by the liquid separator, an upper electromagnetic valve is arranged in the upper refrigerant channel between the upper evaporator and the liquid separator, the upper electromagnetic valve can be used for controlling the circulation and closing of the upper refrigerant channel, and a lower coil temperature sensor is arranged in the lower coil corresponding to the lower evaporator, and can be used for detecting the temperature of the lower coil of the lower evaporator.
Specifically, taking the air conditioner in the cooling mode as an example (the control principle in the heating mode is the same, and only the corresponding cooling working process is converted into the heating working process), when the air conditioner is in the silent mode, the outdoor controller of the air conditioner controls the compressor of the air conditioner to operate at a preset first target frequency, the indoor controller of the air conditioner controls the upper electromagnetic valve to operate, so that the upper refrigerant channel is in a closed state, no refrigerant flows into the upper evaporator, the refrigerant only flows into the lower evaporator through the lower refrigerant channel after passing through the liquid distributor, evaporation and indoor air heat exchange are performed in the lower evaporator, the indoor controller controls the cross-flow fan in the lower air duct to operate at a preset first target rotating speed, and controls the centrifugal fan in the upper air duct to stop rotating, the corresponding lower air outlet outputs cold air, and the upper air outlet does not output air, meanwhile, the real-time lower coil temperature of the lower evaporator is detected through the lower coil temperature sensor, and the outdoor controller adjusts the working frequency of the compressor according to the real-time detected lower coil temperature so as to control the compressor to stably operate, so that the indoor temperature and humidity are kept stable.
It can be understood that, when the air conditioner is in a refrigeration mode and the mute mode is not turned on, the air conditioner runs in a common refrigeration mode, the upper refrigerant channel and the lower refrigerant channel are both in a circulation state, the refrigerant passes through the liquid separator and is divided into two parts, one part flows into the upper evaporator through the upper refrigerant channel, the other part flows into the lower evaporator through the lower refrigerant channel, the upper evaporator and the lower evaporator exchange heat simultaneously, the cross-flow fan in the lower air channel and the centrifugal fan in the upper air channel are controlled by the indoor controller to run at set rotating speeds (the rotating speeds of the cross-flow fan and the centrifugal fan can be set according to actual needs), the corresponding upper air outlet and the corresponding lower air outlet output cold air respectively, and therefore, the refrigeration function is achieved.
It should be noted that the on/off of the upper electromagnetic valve is controlled by the indoor controller of the air conditioner to power on or power off the coil of the upper electromagnetic valve, and the upper electromagnetic valve may be a normally open type electromagnetic valve or a normally closed type electromagnetic valve, for example, the upper electromagnetic valve is a normally open type electromagnetic valve, when the air conditioner is in the refrigeration mode and the mute mode is not turned on, the normally open type electromagnetic valve is controlled to be in the power off state by the indoor controller of the air conditioner, the normally open type electromagnetic valve is kept open, so that the upper refrigerant channel is in the circulation state, when the air conditioner is in the refrigeration mode and the mute mode is turned on, the normally open type electromagnetic valve is controlled to be in the power on state by the indoor controller of the air conditioner, and the normally open type electromagnetic valve is closed, so that the upper.
The embodiment of the invention provides a control method for muting an air conditioner, wherein two air outlets are longitudinally arranged on the air conditioner, an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet respectively correspond to separate air channels, a centrifugal fan is adopted in the upper air channel, a cross-flow fan is adopted in the lower air channel, an evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid distributor, the upper evaporator corresponds to the upper air outlet, the lower evaporator corresponds to the lower air outlet, the lower evaporator is provided with a lower coil temperature sensor, an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid distributor and is used for controlling the circulation and the closing of the upper refrigerant channel; when the air conditioner is in a silent mode, the compressor of the air conditioner is controlled to run at a preset first target frequency through the outdoor controller, the upper electromagnetic valve is controlled through the indoor controller, so that the upper refrigerant channel is in a closed state, the refrigerant flows into the lower evaporator through the liquid distributor, the cross-flow fan is controlled to run at a preset first target rotating speed through the indoor controller, the centrifugal fan is controlled to stop running, the lower coil temperature of the lower evaporator is detected through the lower coil temperature sensor, the working frequency of the compressor is adjusted by the outdoor controller according to the lower coil temperature, on the basis of maintaining the indoor temperature and humidity requirements, the noise of the air conditioner is effectively reduced, the comfort is improved, and the user experience is improved.
As a modification of the above solution, as shown in fig. 4C, a lower solenoid valve is disposed in the lower refrigerant passage between the lower evaporator and the liquid separator, and the lower solenoid valve is used for controlling the circulation and closing of the lower refrigerant passage.
Specifically, in combination with the above-described embodiment, a lower solenoid valve for controlling the circulation and closing of the lower refrigerant passage is provided in the lower refrigerant passage between the lower evaporator and the liquid separator, so that the lower refrigerant passage can be controlled independently to realize different functions.
It should be noted that, the upper electromagnetic valve and the lower electromagnetic valve in the embodiment of the present invention may be disposed on the inlet side and the outlet side of the refrigerant flowing direction, preferably on the inlet side, and if disposed on the outlet side of the refrigerant flowing direction, since there is always much refrigerant and compressor lubricant remaining in the evaporator, and the refrigerant cannot circulate in the whole refrigeration system, the compressor lubricant may be poor and the lifetime may be shortened or may be lost.
In addition, the upper electromagnetic valve and the lower electromagnetic valve can also be expanded to be replaced by using an electronic expansion valve, the inner caliber of the electromagnetic valve is large, the resistance loss of a refrigerant passing through the electromagnetic valve is small, the noise is low, the inner caliber of the electronic expansion valve is small, the generated resistance loss is large, the refrigerating capacity loss is large, a resetting process is carried out on the electronic expansion valve every time the electronic expansion valve is powered on, the obvious rattling and rattling noise can be generated, and the user experience can be influenced.
As an improvement of the above scheme, the air conditioner is further provided with a position sensor; the position sensor is used for detecting the distance between the indoor human body position and the air conditioner.
Specifically, combine above-mentioned embodiment, still be provided with position sensor on the panel of air conditioner, can be used for detecting the distance of indoor all human body positions and the position that the air conditioner was located to carry out difference and control centrifugal fan and cross flow fan according to the distance that detects, thereby realize different silence functions, promote user experience.
In another preferred embodiment, the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance is smaller than a preset first distance threshold value, controlling the compressor to operate at the first target frequency through the outdoor controller;
controlling the upper solenoid valve by the indoor controller such that the upper refrigerant passage is in a closed state, and the refrigerant flows into the lower evaporator through the liquid separator;
controlling the cross-flow fan to operate at the first target rotating speed through the indoor controller, and controlling the centrifugal fan to stop rotating;
and detecting the temperature of a lower coil of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the lower coil.
Specifically, with reference to the above-mentioned embodiments, when the air conditioner is in the cooling mode and the mute mode is turned on, the distance between the current indoor human body position and the air conditioner position is detected by the position sensor, when the detected distance is smaller than the preset first distance threshold, it indicates that the human body is within a certain range, the outdoor controller of the air conditioner controls the compressor of the air conditioner to operate at the preset first target frequency, the indoor controller of the air conditioner controls the operation of the upper electromagnetic valve, so that the upper refrigerant channel is in the closed state, no refrigerant flows into the upper evaporator, after passing through the liquid separator, the refrigerant can only flow into the lower evaporator through the lower refrigerant channel, exchanges heat with the indoor air in the lower evaporator, and the indoor controller controls the cross-flow fan in the lower air duct to operate at the preset first target rotation speed, and controlling the centrifugal fan in the upper air duct to stop rotating, outputting cold air at the corresponding lower air outlet, and not outputting air at the upper air outlet, and meanwhile, detecting the real-time lower coil temperature of the lower evaporator through the lower coil temperature sensor, and adjusting the working frequency of the compressor by the outdoor controller according to the real-time detected lower coil temperature to control the compressor to stably operate, thereby maintaining the stability of the indoor temperature and humidity.
As a modification of the above solution, as shown in fig. 4C, the upper evaporator is provided with an upper coil temperature sensor; the upper coil temperature sensor is used for detecting the upper coil temperature of the upper evaporator.
Specifically, in combination with the above embodiment, the upper coil pipe corresponding to the upper evaporator is provided with the upper coil pipe temperature sensor, which can be used to detect the upper coil pipe temperature of the upper evaporator.
In yet another preferred embodiment, the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance is not less than a preset second distance threshold value, controlling the compressor to operate at a preset second target frequency through the outdoor controller; wherein the second distance threshold is greater than a preset first distance threshold;
controlling the lower solenoid valve by the indoor controller such that the lower refrigerant passage is in a closed state and the refrigerant flows into the upper evaporator through the liquid separator;
controlling the centrifugal fan to operate at a preset second target rotating speed through the indoor controller, and controlling the cross-flow fan to stop rotating;
and detecting the temperature of an upper coil of the upper evaporator through the upper coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the upper coil.
Specifically, with reference to the above embodiment, when the air conditioner is in the cooling mode and the mute mode is turned on, the distance between the current indoor human body position and the air conditioner position is detected by the position sensor, when the detected distance is not less than the preset second distance threshold (the second distance threshold is greater than the first distance threshold), which indicates that the human body is out of a certain range, the outdoor controller of the air conditioner controls the compressor of the air conditioner to operate at the preset second target frequency, the indoor controller of the air conditioner controls the lower electromagnetic valve to operate, so that the lower refrigerant channel is in the closed state, no refrigerant flows into the lower evaporator, the refrigerant only flows into the upper evaporator through the upper refrigerant channel after passing through the liquid separator, the refrigerant exchanges heat with the indoor air through the upper evaporator, and the indoor controller controls the centrifugal fan in the upper air duct to operate at the preset second target rotation speed, and controlling the cross-flow fan in the lower air duct to stop rotating, outputting cold air at the corresponding upper air outlet, and not outputting air at the lower air outlet, meanwhile, detecting the real-time upper coil temperature of the upper evaporator by the upper coil temperature sensor, and adjusting the working frequency of the compressor by the outdoor controller according to the real-time detected upper coil temperature to control the compressor to stably operate, thereby maintaining the indoor temperature and humidity to be stable.
In yet another preferred embodiment, the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance at least comprises a first distance, a second distance and a third distance, the first distance is smaller than a preset first distance threshold, the second distance is not smaller than the first distance threshold and is smaller than a preset second distance threshold, and the third distance is not smaller than the second distance threshold, the outdoor controller controls the compressor to operate at the first target frequency;
controlling the upper solenoid valve and the lower solenoid valve by the indoor controller such that the upper refrigerant passage and the lower refrigerant passage are in a circulation state, and the refrigerant flows into the upper evaporator and the lower evaporator through the liquid separator, respectively;
and controlling the cross-flow fan to operate at the first target rotating speed through the indoor controller, and controlling the centrifugal fan to operate at a preset second target rotating speed.
Specifically, with reference to the above embodiment, when the air conditioner is in the cooling mode and the mute mode is turned on, the distance between the current indoor human body position and the air conditioner position is detected by the position sensor, and when the detected distance at least includes a first distance, a second distance and a third distance, and the first distance is smaller than a preset first distance threshold, the second distance is not smaller than a preset first distance threshold and is smaller than a preset second distance threshold, and the third distance is not smaller than a preset second distance threshold (the second distance threshold is greater than the first distance threshold), which indicates that the human body is distributed throughout the indoor space, the compressor of the air conditioner is controlled by the outdoor controller of the air conditioner to operate at a preset first target frequency, and the upper electromagnetic valve and the lower electromagnetic valve are controlled by the indoor controller of the air conditioner to operate, so that the upper refrigerant channel and the lower refrigerant channel are both in the circulation state, after passing through the liquid separator, the refrigerant is divided into two parts, one part flows into the upper evaporator through the upper refrigerant channel, the other part flows into the lower evaporator through the lower refrigerant channel, the upper evaporator and the lower evaporator exchange heat simultaneously, the centrifugal fan in the upper air channel is controlled by the indoor controller to operate at a preset second target rotating speed, the through-flow fan in the lower air channel is controlled to operate at a preset first target rotating speed, and the corresponding upper air outlet and the corresponding lower air outlet respectively output cold air, so that the refrigeration function is realized.
The embodiment of the invention has the greatest advantages that when the air conditioner operates by only one fan, the noise generated by the simultaneous operation of two corresponding fans is lower and is more silent, and only part of the evaporator works, so that the silent function can be ensured, and a certain dehumidification capacity and a certain air outlet temperature can be ensured during refrigeration or heating; if only one of the fans is turned off, the evaporator is not partially controlled, the evaporation temperature is too high during refrigeration due to too large area of the evaporator, so that the air conditioner does not have dehumidification capacity and cannot ensure dehumidification effect, and the air conditioner has low outlet air temperature and poor effect due to too low condensation temperature during heating.
The embodiment of the present invention further provides a control device for muting an air conditioner, which can implement all the processes of the control method for muting an air conditioner according to any one of the above embodiments, and the functions and technical effects of the modules in the device are respectively the same as those of the control method for muting an air conditioner according to the above embodiment, and are not described herein again.
Referring to fig. 6, it is a block diagram of a preferred embodiment of a control device for muting an air conditioner according to the present invention, the device is installed in an air conditioner with two air outlets arranged longitudinally, an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet respectively correspond to separate air ducts, a centrifugal fan is used in the upper air duct, and a cross-flow fan is used in the lower air duct; the evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid separator, the upper evaporator corresponds to the upper air outlet, and the lower evaporator corresponds to the lower air outlet; the lower evaporator is provided with a lower coil temperature sensor; an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid distributor and used for controlling the circulation and closing of the upper refrigerant channel; the device comprises:
the compressor control module 11 is configured to control a compressor of the air conditioner to operate at a preset first target frequency through an outdoor controller when the air conditioner starts a mute mode;
an upper solenoid valve control module 12 for controlling the upper solenoid valve through an indoor controller such that the upper refrigerant passage is in a closed state and the refrigerant flows into the lower evaporator through the liquid separator;
a fan control module 13, configured to control the crossflow fan to operate at a preset first target rotation speed through the indoor controller, and control the centrifugal fan to stop rotating;
and the lower coil temperature detection module 14 is configured to detect the lower coil temperature of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the lower coil temperature.
Preferably, a lower solenoid valve is disposed in a lower refrigerant passage between the lower evaporator and the liquid separator, and the lower solenoid valve is configured to control circulation and closing of the lower refrigerant passage.
Preferably, the air conditioner is further provided with a position sensor; the position sensor is used for detecting the distance between the indoor human body position and the air conditioner.
Preferably, the apparatus further comprises:
the distance detection module is used for detecting the distance between the current indoor human body position and the air conditioner through the position sensor; then the process of the first step is carried out,
the compressor control module 11 is configured to control, by the outdoor controller, the compressor to operate at the first target frequency when the distance is smaller than a preset first distance threshold;
the upper solenoid valve control module 12 is configured to control the upper solenoid valve through the indoor controller such that the upper refrigerant passage is in a closed state and the refrigerant flows into the lower evaporator through the liquid separator;
the fan control module 13 is configured to control the cross-flow fan to operate at the first target rotation speed through the indoor controller, and control the centrifugal fan to stop rotating;
the lower coil temperature detection module 14 is configured to detect a lower coil temperature of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the operating frequency of the compressor according to the lower coil temperature.
Preferably, the upper evaporator is provided with an upper coil temperature sensor; the upper coil temperature sensor is used for detecting the upper coil temperature of the upper evaporator.
Preferably, the apparatus further comprises:
the distance detection module is used for detecting the distance between the current indoor human body position and the air conditioner through the position sensor; then the process of the first step is carried out,
the compressor control module 11 is configured to control, by the outdoor controller, the compressor to operate at a preset second target frequency when the distance is not less than a preset second distance threshold; wherein the second distance threshold is greater than a preset first distance threshold;
the lower electromagnetic valve control module is used for controlling the lower electromagnetic valve through the indoor controller so that the lower refrigerant channel is in a closed state, and the refrigerant flows into the upper evaporator through the liquid distributor; then the process of the first step is carried out,
the fan control module 13 is configured to control the centrifugal fan to operate at a preset second target rotation speed through the indoor controller, and control the cross-flow fan to stop rotating;
and the upper coil pipe temperature detection module is used for detecting the upper coil pipe temperature of the upper evaporator through the upper coil pipe temperature sensor so that the outdoor controller adjusts the working frequency of the compressor according to the upper coil pipe temperature.
Preferably, the apparatus further comprises:
the distance detection module is used for detecting the distance between the current indoor human body position and the air conditioner through the position sensor; then the process of the first step is carried out,
the compressor control module 11 is configured to control, by the outdoor controller, the compressor to operate at the first target frequency when the distance at least includes a first distance, a second distance, and a third distance, and the first distance is smaller than a preset first distance threshold, the second distance is not smaller than the first distance threshold and is smaller than a preset second distance threshold, and the third distance is not smaller than the second distance threshold;
a solenoid valve control module for controlling the upper solenoid valve and the lower solenoid valve through the indoor controller so that the upper refrigerant passage and the lower refrigerant passage are in a circulation state, and the refrigerant flows into the upper evaporator and the lower evaporator through the liquid separator, respectively; then the process of the first step is carried out,
the fan control module 13 is configured to control the cross-flow fan to operate at the first target rotational speed through the indoor controller, and control the centrifugal fan to operate at a preset second target rotational speed.
An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program; wherein the computer program, when running, controls the device where the computer readable storage medium is located to execute the method for controlling muting of an air conditioner according to any of the above embodiments.
An embodiment of the present invention further provides an air conditioner, which is shown in fig. 7 and is a block diagram of a preferred embodiment of the air conditioner provided by the present invention, the air conditioner includes a processor 10, a memory 20, and a computer program stored in the memory 20 and configured to be executed by the processor 10, and the processor 10 implements the control method for muting the air conditioner according to any of the above embodiments when executing the computer program.
Preferably, the computer program can be divided into one or more modules/units (e.g. computer program 1, computer program 2,) which are stored in the memory 20 and executed by the processor 10 to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program in the air conditioner.
The Processor 10 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, etc., the general purpose Processor may be a microprocessor, or the Processor 10 may be any conventional Processor, the Processor 10 is a control center of the air conditioner, and various interfaces and lines are used to connect various parts of the air conditioner.
The memory 20 mainly includes a program storage area that may store an operating system, an application program required for at least one function, and the like, and a data storage area that may store related data and the like. In addition, the memory 20 may be a high speed random access memory, may also be a non-volatile memory, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), and the like, or the memory 20 may also be other volatile solid state memory devices.
It should be noted that the air conditioner may include, but is not limited to, a processor and a memory, and those skilled in the art will understand that the structural block diagram of fig. 7 is only an example of the air conditioner, and does not constitute a limitation of the air conditioner, and may include more or less components than those shown, or combine some components, or different components.
To sum up, the embodiment of the invention provides a method and a device for controlling the mute of an air conditioner, a computer readable storage medium and the air conditioner, wherein the air conditioner is longitudinally provided with two air outlets, an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet respectively correspond to separate air ducts, a centrifugal fan is adopted in the upper air duct, a cross-flow fan is adopted in the lower air duct, an evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid separator, the upper evaporator corresponds to the upper air outlet, the lower evaporator corresponds to the lower air outlet, the lower evaporator is provided with a lower coil temperature sensor, an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid separator, and the upper electromagnetic valve is used for controlling the circulation and the closing of the upper; when the air conditioner is in a silent mode, the compressor of the air conditioner is controlled to run at a preset first target frequency through the outdoor controller, the upper electromagnetic valve is controlled through the indoor controller, so that the upper refrigerant channel is in a closed state, the refrigerant flows into the lower evaporator through the liquid distributor, the cross-flow fan is controlled to run at a preset first target rotating speed through the indoor controller, the centrifugal fan is controlled to stop running, the lower coil temperature of the lower evaporator is detected through the lower coil temperature sensor, the working frequency of the compressor is adjusted by the outdoor controller according to the lower coil temperature, on the basis of maintaining the indoor temperature and humidity requirements, the noise of the air conditioner is effectively reduced, the comfort is improved, and the user experience is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A control method for muting an air conditioner is characterized in that the method is suitable for the air conditioner with two air outlets arranged longitudinally, an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet are respectively corresponding to separate air channels, a centrifugal fan is adopted in the upper air channel, and a cross-flow fan is adopted in the lower air channel; the evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid separator, the upper evaporator corresponds to the upper air outlet, and the lower evaporator corresponds to the lower air outlet; the lower evaporator is provided with a lower coil temperature sensor; an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid distributor and used for controlling the circulation and closing of the upper refrigerant channel; the method comprises the following steps:
when the air conditioner is started in a mute mode, controlling a compressor of the air conditioner to run at a preset first target frequency through an outdoor controller;
controlling the upper solenoid valve by an indoor controller such that the upper refrigerant passage is in a closed state, and the refrigerant flows into the lower evaporator through the liquid separator;
controlling the cross-flow fan to run at a preset first target rotating speed through the indoor controller, and controlling the centrifugal fan to stop running;
and detecting the temperature of a lower coil of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the lower coil.
2. The method of controlling silencing of an air conditioner according to claim 1, wherein a lower solenoid valve is provided in a lower refrigerant passage between the lower evaporator and the dispenser, the lower solenoid valve being for controlling the circulation and closing of the lower refrigerant passage.
3. The method of controlling muting of an air conditioner according to claim 2, wherein the air conditioner is further provided with a position sensor; the position sensor is used for detecting the distance between the indoor human body position and the air conditioner.
4. The method of controlling muting of an air conditioner according to claim 3, wherein the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance is smaller than a preset first distance threshold value, controlling the compressor to operate at the first target frequency through the outdoor controller;
controlling the upper solenoid valve by the indoor controller such that the upper refrigerant passage is in a closed state, and the refrigerant flows into the lower evaporator through the liquid separator;
controlling the cross-flow fan to operate at the first target rotating speed through the indoor controller, and controlling the centrifugal fan to stop rotating;
and detecting the temperature of a lower coil of the lower evaporator through the lower coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the lower coil.
5. The method of claim 3, wherein the upper evaporator is provided with an upper coil temperature sensor; the upper coil temperature sensor is used for detecting the upper coil temperature of the upper evaporator.
6. The method of controlling muting of an air conditioner according to claim 5, wherein the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance is not less than a preset second distance threshold value, controlling the compressor to operate at a preset second target frequency through the outdoor controller; wherein the second distance threshold is greater than a preset first distance threshold;
controlling the lower solenoid valve by the indoor controller such that the lower refrigerant passage is in a closed state and the refrigerant flows into the upper evaporator through the liquid separator;
controlling the centrifugal fan to operate at a preset second target rotating speed through the indoor controller, and controlling the cross-flow fan to stop rotating;
and detecting the temperature of an upper coil of the upper evaporator through the upper coil temperature sensor, so that the outdoor controller adjusts the working frequency of the compressor according to the temperature of the upper coil.
7. The method of controlling muting of an air conditioner according to claim 3, wherein the method further comprises:
detecting the distance between the current indoor human body position and the air conditioner through the position sensor;
when the distance at least comprises a first distance, a second distance and a third distance, the first distance is smaller than a preset first distance threshold, the second distance is not smaller than the first distance threshold and is smaller than a preset second distance threshold, and the third distance is not smaller than the second distance threshold, the outdoor controller controls the compressor to operate at the first target frequency;
controlling the upper solenoid valve and the lower solenoid valve by the indoor controller such that the upper refrigerant passage and the lower refrigerant passage are in a circulation state, and the refrigerant flows into the upper evaporator and the lower evaporator through the liquid separator, respectively;
and controlling the cross-flow fan to operate at the first target rotating speed through the indoor controller, and controlling the centrifugal fan to operate at a preset second target rotating speed.
8. A control device for muting an air conditioner is characterized in that the device is installed in the air conditioner with two air outlets longitudinally, an upper air outlet is arranged at the top of the air conditioner, a lower air outlet is arranged in the middle of the air conditioner, the upper air outlet and the lower air outlet respectively correspond to separate air channels, a centrifugal fan is adopted in the upper air channel, and a cross-flow fan is adopted in the lower air channel; the evaporator of the air conditioner is divided into an upper evaporator and a lower evaporator through a liquid separator, the upper evaporator corresponds to the upper air outlet, and the lower evaporator corresponds to the lower air outlet; the lower evaporator is provided with a lower coil temperature sensor; an upper electromagnetic valve is arranged in an upper refrigerant channel between the upper evaporator and the liquid distributor and used for controlling the circulation and closing of the upper refrigerant channel; the device comprises:
the compressor control module is used for controlling a compressor of the air conditioner to run at a preset first target frequency through an outdoor controller when the air conditioner starts a mute mode;
an upper solenoid valve control module for controlling the upper solenoid valve through an indoor controller so that the upper refrigerant passage is in a closed state and the refrigerant flows into the lower evaporator through the liquid separator;
the fan control module is used for controlling the cross-flow fan to run at a preset first target rotating speed through the indoor controller and controlling the centrifugal fan to stop running;
and the lower coil temperature detection module is used for detecting the lower coil temperature of the lower evaporator through the lower coil temperature sensor so that the outdoor controller adjusts the working frequency of the compressor according to the lower coil temperature.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored computer program; wherein the computer program controls, when running, an apparatus in which the computer-readable storage medium is located to perform the control method of muting an air conditioner according to any one of claims 1 to 7.
10. An air conditioner comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the control method of air conditioner muting according to any one of claims 1 to 7 when executing the computer program.
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| TW438953B (en) * | 1999-09-20 | 2001-06-07 | Mitsubishi Electric Corp | Blower, blower system and the blowing method of blower system |
| JP2003314858A (en) * | 2002-04-22 | 2003-11-06 | Daikin Ind Ltd | Air conditioner |
| JP4126535B2 (en) * | 2002-08-07 | 2008-07-30 | 株式会社富士通ゼネラル | Control method of air conditioner |
| JP2006112717A (en) * | 2004-10-15 | 2006-04-27 | Royal Electric Co Ltd | Range hood fan |
| KR100761290B1 (en) * | 2005-08-24 | 2007-09-27 | 엘지전자 주식회사 | Air conditioner and Control method of the same |
| JP2015113993A (en) * | 2013-12-09 | 2015-06-22 | シャープ株式会社 | Air conditioner |
| CN103673109A (en) * | 2013-12-12 | 2014-03-26 | 广东美的制冷设备有限公司 | Split floor type air conditioner and air channel structure thereof |
| CN106440046B (en) * | 2016-10-31 | 2021-11-02 | 芜湖美智空调设备有限公司 | Top air outlet air conditioner and control method thereof |
| KR102380096B1 (en) * | 2017-07-20 | 2022-03-31 | 엘지전자 주식회사 | Window type air conditioner |
| CN108981093B (en) * | 2018-06-08 | 2020-07-31 | 宁波奥克斯电气股份有限公司 | Mute control method and device |
| CN208382351U (en) * | 2018-06-29 | 2019-01-15 | 广东美的制冷设备有限公司 | Mobile air conditioner |
| CN209672481U (en) * | 2018-11-22 | 2019-11-22 | 珠海格力电器股份有限公司 | A kind of air-conditioning draught fan |
| CN109916043B (en) * | 2019-02-02 | 2021-04-06 | 广东美的暖通设备有限公司 | Mode switching control method and air conditioning system |
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