CN111503822A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN111503822A CN111503822A CN202010353599.2A CN202010353599A CN111503822A CN 111503822 A CN111503822 A CN 111503822A CN 202010353599 A CN202010353599 A CN 202010353599A CN 111503822 A CN111503822 A CN 111503822A
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- temperature
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- heat exchanger
- indoor fan
- rotating speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of an air conditioner, wherein the air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, an electric auxiliary heater, an indoor fan and a defrosting heating element, wherein the indoor heat exchanger and the outdoor heat exchanger are used for condensing and radiating heat in a defrosting mode, and the defrosting heating element is used for heating a refrigerant flowing from the outdoor heat exchanger to a return air port of the compressor in the defrosting mode; the control method comprises the following steps: receiving a defrosting instruction, and starting an electric auxiliary heater; detecting the temperature Tptc of the electric auxiliary heater and judging whether a first set condition is met, detecting the tube temperature T2 of the indoor heat exchanger and judging whether a second set condition is met; when the acquired temperature Tptc is greater than or equal to a first set temperature A and the pipe temperature T2 is greater than or equal to a first preset temperature D, increasing the rotating speed of the indoor fan; and when the temperature Tptc is less than a second set temperature B and the pipe temperature T2 is less than a second preset temperature C, reducing the rotating speed of the indoor fan. Therefore, fluctuation of indoor temperature in the defrosting mode is reduced, and use experience is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner.
Background
When the air conditioner works in winter, the surface temperature of an outdoor heat exchanger of an outdoor unit can reach below zero, the surface of the outdoor heat exchanger can be frosted, and the frost layer on the surface of the outdoor heat exchanger can block air flow and reduce the heating capacity of the air conditioner, so the air conditioner needs to be defrosted.
However, the related art air conditioner performs defrosting in a defrosting mode in general in two ways: one is reverse defrosting, namely when the defrosting condition is achieved, the heating state of the whole machine is stopped, the whole machine is switched to a refrigerating state, heat reversely reaches an outdoor evaporator, and the purpose of defrosting is achieved. The other is heat storage defrosting, when the defrosting condition is achieved, the heating state of the whole machine is not stopped, the heat of the heat storage device is used for defrosting the outdoor heat exchanger, but the indoor temperature can also obviously fluctuate in the defrosting process.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a control method of an air conditioner, which can reduce indoor temperature fluctuation in a defrosting mode and improve the use experience of the air conditioner.
According to the control method of the air conditioner, the air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, an electric auxiliary heater, an indoor fan and a defrosting heating element, the air conditioner is provided with a defrosting mode, the indoor heat exchanger and the outdoor heat exchanger are used for condensing and radiating heat in the defrosting mode, and the defrosting heating element is used for heating a refrigerant flowing from the outdoor heat exchanger to a gas return port of the compressor in the defrosting mode; the control method comprises the following steps: receiving a defrosting instruction, and starting the electric auxiliary heater; detecting the temperature Tptc of the electric auxiliary heater and determining whether a first set condition is satisfied, detecting the tube temperature T2 of the indoor heat exchanger and determining whether a second set condition is satisfied; when the acquired temperature Tptc is greater than or equal to a first set temperature A and the pipe temperature T2 is greater than or equal to a first preset temperature D, increasing the rotating speed of the indoor fan; and when the temperature Tptc is less than a second set temperature B and the pipe temperature T2 is less than a second preset temperature C, reducing the rotating speed of the indoor fan.
According to the control method of the air conditioner, the fluctuation of the indoor temperature in the defrosting mode is reduced through the following three directions, and the use experience of the air conditioner is improved.
(1) The electric auxiliary heater can perform auxiliary heating indoors, can make up for insufficient heat of the indoor heat exchanger, and further reduce fluctuation of indoor temperature;
(2) more importantly, the air conditioner can adjust the rotating speed of the indoor fan according to the temperature of the air flow generated in the electric auxiliary heater and the indoor heat exchanger, avoid the over-low temperature of the air flow provided towards the indoor, and effectively reduce the temperature fluctuation of the indoor air in the defrosting mode.
According to some embodiments of the invention, after the rotating speed of the indoor fan is adjusted, the control method further comprises the following steps: detecting an indoor ambient temperature T1 and determining whether a third set condition is satisfied; and when the indoor environment temperature T1 is not less than a third set temperature F, keeping the current rotating speed of the indoor fan.
Further, when the indoor environment temperature T1 is acquired to be less than a fourth set temperature E after the rotating speed of the indoor fan is increased, the rotating speed of the indoor fan is reduced; and when the indoor environment temperature T1 is less than a fourth set temperature E after the rotating speed of the indoor fan is reduced, the rotating speed of the indoor fan is increased, and the output power of the electric auxiliary heater is increased.
And further, when the indoor environment temperature T1 is acquired to be less than a fourth set temperature E after the rotating speed of the indoor fan is increased, the output power of the electric auxiliary heater is increased.
In some embodiments, the control method further comprises controlling the rotation angle of the air deflector at the air outlet according to the pipe temperature T2 of the indoor heat exchanger.
Further, when the obtained pipe temperature T2 is greater than or equal to a third preset temperature M, the air deflector is controlled to rotate to a target angle; and when the pipe temperature T2 is less than the fourth preset temperature N, controlling the air deflector to continuously swing.
In some embodiments, when the current rotating speed of the indoor fan is greater than or equal to a preset rotating speed and the pipe temperature T2 is less than a fourth preset temperature N, the air deflector is controlled to continuously swing; when the current rotating speed of the indoor fan is less than the preset rotating speed and the pipe temperature T2 is less than a fourth preset temperature N, controlling the air deflector to keep the current angle; when the current rotating speed of the indoor fan is not less than the preset rotating speed and the pipe temperature T2 is not less than a third preset temperature M, controlling the air deflector to keep the current angle; and when the current rotating speed of the indoor fan is less than the preset rotating speed and the pipe temperature T2 is greater than or equal to a third preset temperature M, increasing the rotating angle of the air deflector.
According to some embodiments of the invention, the air conditioner comprises: the outdoor heat exchanger comprises a bypass branch and a throttling branch which are connected in parallel, wherein a control valve is connected in series on the bypass branch, a throttling element with adjustable opening degree is connected in series on the throttling branch, and the throttling element is connected in series between the indoor heat exchanger and the outdoor heat exchanger; the reversing assembly is used for switching the flow direction of a refrigerant and is provided with a first interface to a fourth interface, the first interface is connected with an exhaust port of the compressor, the second interface is connected with a return air port of the compressor, the third interface is connected with the indoor heat exchanger, and the fourth interface is connected with the outdoor heat exchanger; and two ends of the defrosting heating element are respectively connected with the second connector and the air return port.
Further, the defrosting heating member includes a heat storage material member.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a defrost mode of an air conditioner according to an embodiment of the present invention;
fig. 3 is another flowchart of a defrost mode of an air conditioner according to an embodiment of the present invention.
Reference numerals:
the air-conditioner (100) is provided with,
the air conditioner includes a compressor 10, an indoor heat exchanger 20, an outdoor heat exchanger 30, an electric auxiliary heater 40, an indoor fan 50, a defrosting heating member 60, a control valve 70, a throttling element 80, a reversing component 91, and a three-way valve 92.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A control method of an air conditioner 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 3, and as shown in fig. 1, the air conditioner 100 includes a compressor 10, an indoor heat exchanger 20, an outdoor heat exchanger 30, an electric auxiliary heater 40, an indoor fan 50, and a defrosting heating element 60, the air conditioner 100 having a defrosting mode in which the indoor heat exchanger 20 and the outdoor heat exchanger 30 condense to dissipate heat, and the defrosting heating element 60 is configured to heat a refrigerant flowing from the outdoor heat exchanger 30 to a return port of the compressor 10 in the defrosting mode.
In the air conditioner 100 of the present embodiment, when in the defrosting mode, the refrigerant discharged from the compressor 10 is sequentially discharged into the indoor heat exchanger 20 and the outdoor heat exchanger 30 to be condensed and radiated, so that the outdoor heat exchanger 30 can be defrosted by the refrigerant. The defrosting heater 60 is a heat source for heating the refrigerant flowing out of the outlet end of the outdoor heat exchanger 30 and flowing to the return port of the compressor 10, and ensures that the refrigerant entering the compressor 10 is in a gaseous state to prevent a liquid impact phenomenon.
Referring to fig. 2, a control method according to some embodiments of the present application includes the steps of: receiving a defrosting instruction, and turning on the electric auxiliary heater 40; detecting the temperature Tptc of the electric auxiliary heater 40 and determining whether a first set condition is satisfied, detecting the tube temperature T2 of the indoor heat exchanger 20 and determining whether a second set condition is satisfied; when the acquired temperature Tptc is greater than or equal to a first set temperature A and the pipe temperature T2 is greater than or equal to a first preset temperature D, increasing the rotating speed of the indoor fan 50; and when the acquired temperature Tptc is less than the second set temperature B and the pipe temperature T2 is less than the second preset temperature C, reducing the rotating speed of the indoor fan 50.
It can be understood that, in the defrosting mode, a part of the refrigerant is directly discharged into the outdoor heat exchanger 30 to be condensed and dissipated, so that the heating capacity of the indoor heat exchanger 30 is affected, and therefore, after the air conditioner 100 receives a defrosting command, the electric auxiliary heater 40 is turned on to supplement the heating capacity of the indoor heat exchanger 20, so as to avoid insufficient heat exchanging capacity between the indoor air and the air flow generated by the air conditioner fan 50.
In the defrosting process, whether the temperature Tptc of the electric auxiliary heater 40 exceeds a first set temperature a or not and whether the tube temperature of the heat tube of the indoor heat exchanger 20 exceeds a first preset temperature D or not are measured in real time, and after the Tptc exceeds the first set temperature a and the tube temperature exceeds the first preset temperature D, the temperatures of the electric auxiliary heater 40 and the indoor heat exchanger 20 are judged to be high, so that the heating requirement can be met, the rotating speed of the indoor fan 50 is further increased, the heat exchange efficiency of the indoor heat exchanger 20 and indoor air is improved, meanwhile, the heat of the electric auxiliary heater 40 can be rapidly dissipated into the indoor environment, and indoor temperature fluctuation is reduced.
Further, when the temperature Tptc of the electric auxiliary heater 40 is less than the second set temperature B and the tube temperature of the heat pipe of the indoor heat exchanger 20 is less than the second predetermined temperature C, it is determined that the temperatures of the electric auxiliary heater 40 and the indoor heat exchanger 20 are low, and there is a possibility that the indoor ambient temperature will be reduced during heat exchange with the indoor, and further, the rotation speed of the indoor fan 50 needs to be reduced, so that excessive air flow which is generated during the heat exchange process and is lower than the indoor temperature is prevented from flowing into the indoor, and the indoor temperature fluctuation is reduced in the defrosting mode.
In summary, according to the control method of the air conditioner 100 in the embodiment of the present invention, the fluctuation of the indoor temperature in the defrosting mode is reduced through the following two directions, and the use experience of the air conditioner 100 is improved.
(1) The electric auxiliary heater 40 can perform auxiliary heating indoors, make up for the insufficient heat of the indoor heat exchanger 20, and further reduce the fluctuation of the indoor temperature;
(2) more importantly, the air conditioner 100 can adjust the rotation speed of the indoor fan 50 according to the temperatures of the air flows generated in the electric auxiliary heater 40 and the indoor heat exchanger 20, so as to prevent the temperature of the air flow supplied to the indoor from being too low, and effectively reduce the temperature fluctuation of the indoor air in the defrosting mode.
It will be understood that the first set temperature a and the second set temperature B, the first predetermined temperature D and the second predetermined temperature C, respectively, represent a temperature value, wherein a and B may be the same value; c and D can be the same value, preferably, A and B respectively represent different temperature values; c and D represent different temperature values respectively, and the difference value between A and B is 2-3 ℃; the difference between C and D is 2-3 deg.C, which can improve the working stability of the air conditioner 100 and avoid frequent switching of the rotation speed of the indoor fan 50.
As shown in fig. 2, according to some embodiments of the present invention, after the rotating speed of the indoor fan 50 is adjusted, the control method further includes the following steps: detecting an indoor ambient temperature T1 and determining whether a third set condition is satisfied; and when the indoor environment temperature T1 is greater than or equal to the third set temperature F, maintaining the current rotating speed of the indoor fan 50.
The detecting of the indoor ambient temperature means detecting the temperature at the air outlet of the indoor heat exchanger 20 by using a temperature detecting element, and controlling the indoor fan 50 to maintain the current rotation speed when the detected indoor ambient temperature is not less than the third predetermined temperature F.
Like this, when the temperature at air outlet department satisfies third settlement temperature F, judge that the air current that indoor fan 50 provided to indoor can not cause the violent fluctuation of indoor temperature, and then maintain indoor fan 50's rotational speed to make indoor fan 50 can stably provide the air current, when accelerating indoor air heat transfer, reduce the temperature fluctuation of indoor air.
It is understood that the temperature characterized by the third set temperature F may be close to or slightly greater than an indoor standard temperature (e.g., 18 ℃), which is a winter room temperature standard for a certain area.
Further, when the indoor environment temperature T1 is acquired to be less than the fourth set temperature E after the rotating speed of the indoor fan 50 is increased, the rotating speed of the indoor fan 50 is reduced; when the indoor ambient temperature T1 is less than the fourth set temperature E obtained after the rotational speed of the indoor fan 50 is reduced, the rotational speed of the indoor fan 50 is increased and the output power of the electric auxiliary heater 40 is increased.
The temperature represented by the fourth setting temperature E may be lower than the indoor standard temperature, the fourth setting temperature E is less than the third setting temperature F, and when the indoor environment temperature T1 is less than the fourth setting temperature E, it is determined that the airflow provided by the indoor fan 50 to the indoor environment will cause severe fluctuation of the indoor temperature.
Based on this, under the above conditions, when the current condition is that the rotation speed of the indoor fan 50 is increased, the rotation speed of the indoor fan 50 is correspondingly decreased, for example: when the rotation speed of the indoor fan 50 is reduced to the original rotation speed (i.e. the rotation speed before adjustment), and the current condition is that the rotation speed of the indoor fan 50 is reduced, the rotation speed of the indoor fan 50 is correspondingly increased, for example: the rotation speed is increased to the original rotation speed, and the output of the electric auxiliary heater 40 is increased.
Thus, the rotating speed of the indoor fan 50 is more reasonable, when the rotating speed of the indoor fan 50 is increased and the airflow provided by the indoor fan 50 cannot meet the requirement of indoor heating, the rotating speed of the indoor fan 50 is reduced, heat exchange between indoor air and the airflow provided by the indoor fan 50 is reduced, when the rotating speed of the indoor fan 50 is reduced and the airflow provided by the indoor fan 50 cannot meet the requirement of indoor heating, the rotating speed of the indoor fan 50 is increased, the output power of the electric auxiliary heater 40 is increased, the heat of the airflow provided by the indoor fan 50 is increased, and indoor temperature fluctuation is effectively reduced.
Further, when the indoor ambient temperature T1 < the fourth set temperature E is obtained after the rotation speed of the indoor fan 50 is increased, the output power of the electric auxiliary heater 40 can be increased, so that the heating capacity of the electric auxiliary heater 40 can be increased, the indoor fan 50 can provide airflow at a higher temperature, and the fluctuation of the indoor temperature is effectively reduced.
In some embodiments, the rotation speed of the indoor fan 50 is reduced before it is determined whether the temperature Tptc of the electric auxiliary heater 40 satisfies the first set condition.
That is, when the air conditioner 100 is turned on and enters the defrosting mode, the indoor fan 50 is controlled to reduce the rotation speed to avoid the initial stage of the defrosting mode, and the indoor fan 50 provides too much air flow with lower temperature to the room to reduce the temperature fluctuation in the room.
It is understood that the control method further includes controlling the rotation angle of the air guide plate at the air outlet according to the tube temperature T2 of the indoor heat exchanger 20. Therefore, the rotation angle of the air deflector is more reasonable, and the heat exchange efficiency of indoor air can be improved when the temperature of the air flow provided by the indoor fan 50 is higher; and when the temperature of the air current provided by the indoor fan 50 is low, the heat exchange efficiency between the indoor air and the air current provided by the indoor fan 50 can be reduced, so that severe temperature fluctuation in the room can be avoided.
As shown in fig. 3, when the obtained pipe temperature T2 is greater than or equal to the third predetermined temperature M, the air deflector is controlled to rotate to the target angle; and when the pipe temperature T2 is less than the fourth preset temperature N, controlling the air deflector to continuously swing.
That is, the air guide plate is selectively swung or rotated to a predetermined angle and then is stationary, so that when the pipe temperature T2 is not less than the third predetermined temperature M, the air guide plate is rotated to a target angle and then is fixed, so that the indoor heat exchanger 20 provides an air flow toward a fixed area, and when the pipe temperature T2 is less than the fourth predetermined temperature N, the air guide plate is continuously swung.
It can be understood that, the third predetermined temperature M > the fourth predetermined temperature N, and the air deflector maintains the above-mentioned operation, the large temperature fluctuation in the room can be avoided.
For example, when the pipe temperature T2 is greater than or equal to the third preset temperature M, the air is blown out towards a fixed area, so that large temperature fluctuation can be avoided; when the tube temperature T2 is less than the fourth preset temperature N, heat exchange is carried out with indoor air in multiple directions, so that the indoor temperature is uniformly and slowly reduced, and large temperature fluctuation can be avoided.
Further, in the specific embodiment shown in fig. 3, when the current rotation speed of the indoor fan 50 is obtained to be greater than or equal to the preset rotation speed and the pipe temperature T2 is less than the fourth preset temperature N, the air deflector is controlled to continuously swing; when the current rotating speed of the indoor fan 50 is less than the preset rotating speed and the pipe temperature T2 is less than a fourth preset temperature N, controlling the air deflector to keep the current angle; when the current rotating speed of the indoor fan 50 is not less than the preset rotating speed and the pipe temperature T2 is not less than the third preset temperature M, controlling the air deflector to keep the current angle; and when the current rotating speed of the indoor fan 50 is less than the preset rotating speed and the pipe temperature T2 is greater than or equal to the third preset temperature M, increasing the rotating angle of the air deflector. Therefore, the angle and the opening degree of the air guide plate are more reasonable, and the air guide plate can adapt to work at different preset temperatures and different set temperatures so as to effectively avoid large fluctuation of indoor temperature.
In the particular embodiment shown in fig. 1, according to some embodiments of the present invention, an air conditioner 100 includes: the system comprises a bypass branch and a throttling branch which are connected in parallel, wherein a control valve 70 is connected in series on the bypass branch, a throttling element 80 with adjustable opening degree is connected in series on the throttling branch, and the throttling element 80 is connected in series between an indoor heat exchanger 20 and an outdoor heat exchanger 30; the reversing assembly 91 is used for switching the flow direction of the refrigerant, the reversing assembly 91 is provided with a first interface to a fourth interface, the first interface is connected with an exhaust port of the compressor 10, the second interface is connected with a return air port of the compressor 10, the third interface is connected with the indoor heat exchanger 20, and the fourth interface is connected with the outdoor heat exchanger 30; both ends of the defrosting heating member 60 are connected to the second port and the return port, respectively.
Specifically, the air conditioner 100 of the present embodiment has at least heating, cooling, and the above-described defrosting modes, in which the indoor heat exchanger 20 supplies heat and the outdoor heat exchanger 30 absorbs heat in the heating mode, in which the indoor heat exchanger 20 cools and the outdoor heat exchanger 30 dissipates heat, and in which both the indoor heat exchanger 20 and the outdoor heat exchanger 30 supply heat in the defrosting mode.
Accordingly, when the air conditioner 100 is in the defrosting mode, the indoor heat exchanger 20 and the outdoor heat exchanger 30 are communicated by the bypass branch, and the throttle branch is closed. Through the reversing action of the reversing assembly 91, the air conditioner 100 can be switched between the heating mode and the cooling mode, the indoor heat exchanger 20 and the outdoor heat exchanger 30 are communicated through the throttling branch in the heating and cooling modes, and the bypass branch is closed, so that the working stability of the air conditioner 100 in the heating mode, the cooling mode and the defrosting mode can be improved.
It can be understood that, as shown in fig. 1, a three-way valve 91 is further disposed between the reversing assembly 91 and the defrosting heating element 60, two of three ports of the three-way valve 91 are communicated, and the other port is closed, so that on the premise of realizing the refrigerant circulation between the defrosting heating element 60 and the compressor 10, the pressure stabilization function is achieved, and the working stability of the defrosting heating element 60 can be improved.
Preferably, the defrosting heating member 60 includes a heat storage material member, the defrosting heating member 60 is heated when a high-temperature refrigerant flows in, and heats a low-temperature refrigerant when a low-temperature refrigerant flows in, the heat storage material member realizes the above-mentioned heat absorption and heat release processes through phase change, the working stability of the defrosting heating member 60 can be improved, and the defrosting heating member 60 does not need to be separately provided with a heating member, and the production cost of the air conditioner 100 can be reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A control method of an air conditioner is characterized in that the air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, an electric auxiliary heater, an indoor fan and a defrosting heating element, the air conditioner is provided with a defrosting mode, the indoor heat exchanger and the outdoor heat exchanger are condensed to dissipate heat in the defrosting mode, and the defrosting heating element is configured to heat a refrigerant flowing from the outdoor heat exchanger to a return air port of the compressor in the defrosting mode;
the control method comprises the following steps:
receiving a defrosting instruction, and starting the electric auxiliary heater;
detecting the temperature Tptc of the electric auxiliary heater and determining whether a first set condition is satisfied, detecting the tube temperature T2 of the indoor heat exchanger and determining whether a second set condition is satisfied;
when the acquired temperature Tptc is greater than or equal to a first set temperature A and the pipe temperature T2 is greater than or equal to a first preset temperature D, increasing the rotating speed of the indoor fan; and when the temperature Tptc is less than a second set temperature B and the pipe temperature T2 is less than a second preset temperature C, reducing the rotating speed of the indoor fan.
2. The control method of an air conditioner according to claim 1, wherein after the rotational speed of the indoor fan is adjusted, the control method further comprises the steps of:
detecting an indoor ambient temperature T1 and determining whether a third set condition is satisfied;
and when the indoor environment temperature T1 is not less than a third set temperature F, keeping the current rotating speed of the indoor fan.
3. The control method of the air conditioner according to claim 2, wherein when the indoor ambient temperature T1 < a fourth set temperature E is obtained after the rotation speed of the indoor fan is increased, the rotation speed of the indoor fan is decreased;
and when the indoor environment temperature T1 is less than a fourth set temperature E after the rotating speed of the indoor fan is reduced, the rotating speed of the indoor fan is increased, and the output power of the electric auxiliary heater is increased.
4. The control method of an air conditioner according to claim 3, wherein when the indoor ambient temperature T1 < a fourth set temperature E is obtained after the rotation speed of the indoor fan is increased, the output power of the electric auxiliary heater is increased.
5. The method of claim 1, further comprising controlling a rotation angle of the air guide plate at the air outlet according to a tube temperature T2 of the indoor heat exchanger.
6. The control method of an air conditioner according to claim 5,
when the obtained pipe temperature T2 is greater than or equal to a third preset temperature M, controlling the air deflector to rotate to a target angle;
and when the pipe temperature T2 is less than the fourth preset temperature N, controlling the air deflector to continuously swing.
7. The control method of the air conditioner according to claim 5, wherein when the current rotating speed of the indoor fan is obtained to be more than or equal to a preset rotating speed and the pipe temperature T2 is less than a fourth preset temperature N, the air deflector is controlled to continuously swing;
when the current rotating speed of the indoor fan is less than the preset rotating speed and the pipe temperature T2 is less than a fourth preset temperature N, controlling the air deflector to keep the current angle;
when the current rotating speed of the indoor fan is not less than the preset rotating speed and the pipe temperature T2 is not less than a third preset temperature M, controlling the air deflector to keep the current angle;
and when the current rotating speed of the indoor fan is less than the preset rotating speed and the pipe temperature T2 is greater than or equal to a third preset temperature M, increasing the rotating angle of the air deflector.
8. The control method of an air conditioner according to any one of claims 1 to 7, wherein the air conditioner includes:
the outdoor heat exchanger comprises a bypass branch and a throttling branch which are connected in parallel, wherein a control valve is connected in series on the bypass branch, a throttling element with adjustable opening degree is connected in series on the throttling branch, and the throttling element is connected in series between the indoor heat exchanger and the outdoor heat exchanger;
the reversing assembly is used for switching the flow direction of a refrigerant and is provided with a first interface to a fourth interface, the first interface is connected with an exhaust port of the compressor, the second interface is connected with a return air port of the compressor, the third interface is connected with the indoor heat exchanger, and the fourth interface is connected with the outdoor heat exchanger;
and two ends of the defrosting heating element are respectively connected with the second connector and the air return port.
9. The control method of an air conditioner according to claim 8, wherein said defrosting heating element includes a heat storage material element.
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Cited By (1)
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| CN113669997A (en) * | 2021-08-12 | 2021-11-19 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device and refrigerator |
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