CN111720953A - Air conditioner and control method thereof - Google Patents

Air conditioner and control method thereof Download PDF

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Publication number
CN111720953A
CN111720953A CN202010507206.9A CN202010507206A CN111720953A CN 111720953 A CN111720953 A CN 111720953A CN 202010507206 A CN202010507206 A CN 202010507206A CN 111720953 A CN111720953 A CN 111720953A
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China
Prior art keywords
air conditioner
port
defrosting
electromagnetic valve
heat exchanger
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Pending
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CN202010507206.9A
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Chinese (zh)
Inventor
周学明
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Hisense Shandong Air Conditioning Co Ltd
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Hisense Shandong Air Conditioning Co Ltd
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Priority to CN202010507206.9A priority Critical patent/CN111720953A/en
Publication of CN111720953A publication Critical patent/CN111720953A/en
Pending legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—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
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • 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)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner and a control method thereof, wherein the control method of the air conditioner comprises the following steps: when the defrosting condition is met, controlling the compressor to increase the frequency to a preset defrosting frequency; and operating the defrosting mode, and turning off the outdoor fan. According to the air conditioner control method, the compressor is controlled to be increased to the preset defrosting frequency in advance when the defrosting condition is met, the system pressure and flow can be improved, and the refrigerant temperature is improved, so that the fluctuation of the indoor temperature during defrosting can be reduced, the continuous heat supply is realized, and the use comfort of users is improved.

Description

Air conditioner and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
In the related art, the outdoor unit starts to frost after the air conditioner operates in a severe cold weather, the outdoor unit is frosted more and more along with the extension of the operation time, the heating effect of the air conditioner is deteriorated, and then the air conditioner needs to operate a defrosting mode. However, the air conditioner has a long defrosting time, which causes large indoor temperature fluctuation, and cannot continuously supply heat, and thus, the comfort of the user is poor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a control method for an air conditioner, which can achieve rapid defrosting within two minutes, reduce indoor temperature fluctuation during defrosting, and achieve continuous heat supply.
Another objective of the present invention is to provide an air conditioner using the above air conditioner control method.
The air conditioner control method according to the embodiment of the first aspect of the present invention includes the steps of: when the defrosting condition is met, controlling the compressor to increase the frequency to a preset defrosting frequency; and operating the defrosting mode, and turning off the outdoor fan.
According to the air conditioner control method provided by the embodiment of the invention, the compressor is controlled to be increased to the preset defrosting frequency in advance when the defrosting condition is met, so that the system pressure and flow can be improved, the refrigerant temperature is increased, the indoor temperature fluctuation during defrosting can be reduced, continuous heat supply is realized, and the use comfort of a user is improved.
According to some embodiments of the invention, the compressor passes a first predetermined time t before operating the defrosting mode1Up-converting to the predetermined defrosting frequency, wherein t1Satisfies the following conditions: t is not more than 120s1≤240s。
According to some embodiments of the invention, the t is1Further satisfies the following conditions: t is t1＝180s。
According to some embodiments of the present invention, when the defrosting mode is operated, the indoor fan is controlled to operate at a low rotation speed.
According to some embodiments of the present invention, when a defrosting exit condition is satisfied, the outdoor fan is turned on, and the compressor is controlled to continue to operate at the predetermined defrosting frequency for a second predetermined time; and exiting the defrosting mode.
According to some embodiments of the present invention, when the defrosting exit condition is satisfied, the indoor fan is controlled to operate at a high rotation speed.
According to some embodiments of the invention, the second predetermined time is t2Wherein, the t2Satisfies the following conditions: t is not more than 120s2≤240s。
According to some embodiments of the invention, the t is2Further satisfies the following conditions: t is t2＝180s。
According to some embodiments of the invention, the compressor is down-converted to normal heating frequency operation when the defrost mode is exited.
According to some embodiments of the invention, the air conditioner includes a compressor having an air inlet and an air outlet, a first heat exchanger, a second heat exchanger, a throttling device, and a reversing device, the reversing device including a first port, a second port, a third port, and a fourth port, the other of the first port and the third port being in communication with the other of the second port and the fourth port when one of the first port and the third port is in communication with the other of the second port and the fourth port, a first end of the first heat exchanger being connected to the fourth port, a third end of the second heat exchanger being connected to the second port, the throttling device being connected between a second end of the first heat exchanger and a fourth end of the second heat exchanger, a flow path between the first end and the fourth port being connected to a flow path between the third end and the second port The first branch is provided with a first electromagnetic valve, a second branch is connected between a flow path between the third end and the second interface and the fourth end, the second branch is provided with a second electromagnetic valve, a third electromagnetic valve is arranged on the flow path between the third end and the second interface, the third electromagnetic valve is positioned on one side of the second branch adjacent to the second heat exchanger, a third branch is connected between the second end and the third end, and a fourth electromagnetic valve is arranged on the third branch; when the defrosting mode is operated, the first interface is communicated with the fourth interface, the second interface is communicated with the third interface, the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve are opened, and the third electromagnetic valve is closed.
According to the air conditioner of the embodiment of the second aspect of the present invention, the air conditioner control method according to the above-described embodiment of the first aspect of the present invention is employed.
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 flowchart illustrating an air conditioner control method according to an embodiment of the present invention;
fig. 2 is another flowchart illustrating an air conditioner control method according to an embodiment of the present invention;
FIG. 3 is a schematic view illustrating a flow path of a refrigerant when the air conditioner is in a heating mode;
FIG. 4 is a schematic view illustrating a flow path of a refrigerant when the air conditioner is in a defrosting mode;
fig. 5 is a schematic diagram of a defrosting control of an air conditioner according to an embodiment of the present invention.
Reference numerals:
100: an air conditioner;
1: a compressor; 11: an air inlet; 12: an air outlet;
2: a first heat exchanger; 21: a first end; 22: a second end;
3: a second heat exchanger; 31: a third end; 32: a fourth end;
4: a throttling device; 5: a reversing device; 51: a first interface;
52: a second interface; 53: a third interface; 54: a fourth interface;
6: a first branch; 61: a first solenoid valve; 7: a second branch circuit;
71: a second solenoid valve; 8: a third electromagnetic valve;
9: a third branch; 91: and a fourth solenoid valve.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 making any creative effort, shall fall within the protection scope of the present application.
The air conditioner 100 in the present application performs a refrigeration cycle of the air conditioner 100 by using the compressor 1, the condenser, the expansion valve, and the evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor 1 compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve, and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 1. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner 100 can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner 100 refers to a portion of the refrigeration cycle including the compressor 1 and the outdoor heat exchanger, the indoor unit of the air conditioner 100 includes the indoor heat exchanger, and the expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner 100 is used as a heater for a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner 100 is used as a cooler for a cooling mode.
An air conditioner control method according to an embodiment of a first aspect of the present invention is described below with reference to fig. 1 to 5.
As shown in fig. 1, an air conditioner control method according to an embodiment of a first aspect of the present invention includes the steps of:
when the defrosting condition is satisfied, the compressor 1 is controlled to be upscaled to a predetermined defrosting frequency.
In the above steps, the compressor 1 is controlled to increase frequency before the defrosting mode is operated, so that the pressure and flow of the air conditioner can be increased, the temperature of the refrigerant can be increased, and the frost layer can be rapidly melted, thereby reducing the fluctuation of the indoor temperature, realizing the continuous heat supply of the air conditioner 100, and ensuring that the user has higher use comfort.
And operating the defrosting mode, and turning off the outdoor fan.
When the defrosting mode is operated, the compressor 1 does not need to be stopped, and hot air is still blown indoors, so that the room comfort is improved, the heating capacity single period can be greatly improved (for example, the heating capacity can be improved by over 400W), the indoor unit can continuously blow out hot air when the air conditioner operates in the heating mode, and the comfort is improved.
According to the air conditioner control method provided by the embodiment of the invention, the compressor 1 is controlled to be increased to the preset defrosting frequency in advance when the defrosting condition is met, so that the pressure and the flow of the air conditioner can be improved, the temperature of a refrigerant is increased, the fluctuation of the indoor temperature during defrosting can be reduced, continuous heat supply is realized, and the use comfort of a user is improved.
In some embodiments of the present invention, in conjunction with fig. 5, the compressor 1 passes a first predetermined time t before operating the defrost mode1Raising the frequency to a predetermined defrosting frequency, wherein t1Satisfies the following conditions: t is not more than 120s1Less than or equal to 240 s. Specifically, for example, when t1When the time is less than 120s, the first preset time is too short, and the pressure and the flow of the air conditioner can not be effectively improved, so that the defrosting time is longer, and the defrosting effect is poorer; when t is1The first predetermined time is too long (> 240 s), which may result in excessive pressure loss by the air conditioner. Thereby, the first predetermined time t is set1Satisfies the following conditions: t is not more than 120s1The time is less than or equal to 240s, the defrosting can be rapidly realized, the defrosting time is less than two minutes, and the excessive pressure loss of the air conditioner can be avoided. Wherein, t1May be 180 s.
In a further embodiment of the present invention, when the defrosting mode is operated, the indoor fan is controlled to operate at a low rotation speed. For example, the indoor fan of the air conditioner 100 may include three gears, i.e., a high speed, a medium speed, and a low speed, and when the indoor fan operates at a low speed, the corresponding rotation speeds of the air conditioners 100 of different models and sizes may be different. For example, the rotational speed of the air conditioner 100 of a smaller size is correspondingly smaller. From this, because when air conditioner 100 operation defrosting mode, the air-out temperature of air conditioner 100 is lower relatively, through the operation of control room fan low-speed, can avoid the indoor temperature to fluctuate too greatly when guaranteeing that air conditioner 100 continuously heats to can guarantee that the user has higher use travelling comfort.
In some embodiments of the present invention, the,
referring to fig. 2, when the defrosting exit condition is satisfied, the outdoor fan is turned on, and the compressor 1 is controlled to continue to operate at the predetermined defrosting frequency for a second predetermined time;
and exiting the defrosting mode.
Therefore, the compressor 1 is controlled to continuously run for the second preset time at the preset defrosting frequency when the defrosting exit condition is met, the exhaust temperature and the heat can be quickly increased, the pressure loss of the air conditioner and the reduction of the exhaust temperature during defrosting are compensated, the heating capacity is quickly increased, the heat loss before and after defrosting is reduced, and the use comfort of a user can be further improved.
And further, when the defrosting exit condition is met, controlling the indoor fan to operate at a high rotating speed. So set up, can improve indoor temperature because of changing the frost and losing rapidly to avoid indoor temperature fluctuation too big, guarantee user's travelling comfort.
In some alternative embodiments of the present invention, in conjunction with FIG. 5, the second predetermined time is t2Wherein, t2Satisfies the following conditions: t is not more than 120s2Less than or equal to 240 s. E.g. t2May be 180 s. When t is2When the time is less than 120s, the second preset time is too short, the exhaust temperature and the heat can not be effectively increased, so that the indoor temperature cannot be rapidly increased, the indoor temperature fluctuation is too large, and the user experience is poor; when t is2The second predetermined time is too long > 240s, which may result in excessive power consumption of the air conditioner 100. Thereby, the second predetermined time t is set2Satisfies the following conditions: t is not more than 120s2Less than or equal to 240s, and can reduce the energy consumption of the air conditioner 100 while ensuring that the indoor temperature can be quickly raised.
In some embodiments of the present invention, when the defrost mode is exited, the compressor 1 is down-cycled to normal heating frequency operation. With such an arrangement, the normal heating of the air conditioner 100 can be ensured, and simultaneously, the energy consumption of the air conditioner 100 can be reduced.
In some embodiments of the present invention, referring to fig. 1 and 2, an air conditioner 100 includes a compressor 1, a first heat exchanger 2, a second heat exchanger 3, a throttling device 4, and a reversing device 5. The compressor 1 is used for compressing a low-temperature low-pressure refrigerant into a high-temperature high-pressure refrigerant; the throttling device 4 is used for controlling the flow rate of the refrigerant and has a throttling function, for example, the throttling device 4 can be an expansion valve or a capillary tube; the reversing device 5 is used for changing the flow direction of the refrigerant, conveying the refrigerant of the compressor 1 to the first heat exchanger 2 in the heating mode or the defrosting mode, and recovering the refrigerant of the second heat exchanger 3 to the compressor 1. For example, the reversing device 5 may be a four-way reversing valve. But is not limited thereto.
When the air conditioner 100 operates in the heating mode, the first heat exchanger 2 is a condenser, and the second heat exchanger 3 is an evaporator; when the air conditioner 100 operates in the cooling mode, the first heat exchanger 2 is an evaporator, and the second heat exchanger 3 is a condenser.
The compressor 1 has an air inlet 11 and an air outlet 12, the reversing device 5 comprises a first interface 51, a second interface 52, a third interface 53 and a fourth interface 54, when one of the first interface 51 and the third interface 53 is communicated with one of the second interface 52 and the fourth interface 54, the other of the first interface 51 and the third interface 53 is communicated with the other of the second interface 52 and the fourth interface 54, the first end 21 of the first heat exchanger 2 is connected with the fourth interface 54, the third end 31 of the second heat exchanger 3 is connected with the second interface 52, the throttling device 4 is connected between the second end 22 of the first heat exchanger 2 and the fourth end 32 of the second heat exchanger 3,
a first branch 6 is connected between a flow path between the first end 21 and the fourth port 54 and a flow path between the third end 31 and the second port 52, a first electromagnetic valve 61 is arranged on the first branch 6, a second branch 7 is connected between the flow path between the third end 31 and the second port 52 and the fourth end 32, a second electromagnetic valve 71 is arranged on the second branch 7, a third electromagnetic valve 8 is arranged on the flow path between the third end 31 and the second port 52, the third electromagnetic valve 8 is positioned on one side of the second branch 7 adjacent to the second heat exchanger 3, a third branch 9 is connected between the second end 22 and the third end 31, and a fourth electromagnetic valve 91 is arranged on the third branch 9.
When the defrosting mode is operated, the first port 51 is communicated with the fourth port 54 and the second port 52 is communicated with the third port 53, and the first solenoid valve 61, the second solenoid valve 71 and the fourth solenoid valve 91 are opened and the third solenoid valve 8 is closed.
For example, when the defrosting mode is operated, referring to fig. 2, the refrigerant flow paths include the following two paths: firstly, the gas outlet 12 of the compressor 1, the first interface 51 of the reversing device 5, the fourth interface 54 of the reversing device 5, the first branch 6 (the first electromagnetic valve 61), the third end 31 of the second heat exchanger 3, the fourth end 32 of the second heat exchanger 3, the second branch 7 (the second electromagnetic valve 71), the second interface 52 of the reversing device 5, the third interface 53 of the reversing device 5, and the gas inlet 11 of the compressor 1;
secondly, the air outlet 12 of the compressor 1, the first interface 51 of the reversing device 5, the fourth interface 54 of the reversing device 5, the first end 21 of the first heat exchanger 2, the second end 22 of the first heat exchanger 2, the throttling device 4, the second branch 7 (the second electromagnetic valve 71), the second interface 52 of the reversing device 5, the third interface 53 of the reversing device 5 and the air inlet 11 of the compressor 1.
In the flowing process of the refrigerant, the first electromagnetic valve 61 is used for controlling whether the exhaust gas can enter the first heat exchanger 2, and can be a normally closed electromagnetic valve; the second electromagnetic valve 71 is used for controlling the flow of the refrigerant returning to the compressor 1 to increase the system resistance, so that the temperature of the refrigerant entering the first heat exchanger 2 can be effectively increased, and the second electromagnetic valve 71 can also be a normally closed electromagnetic valve; the third electromagnetic valve 8 controls the conduction or the closing of the main pipeline between the reversing device 5 and the first heat exchanger 2, and the third electromagnetic valve 8 can be a normally open type electromagnetic valve and is closed during defrosting; the fourth solenoid valve 91 may control whether the first heat exchanger 2 communicates with the second heat exchanger 3, and may be a normally closed solenoid valve. When the defrosting mode is operated, the first electromagnetic valve 61 is controlled to be conducted, the first electromagnetic valve controls the flow distribution of high-temperature and high-pressure gas, the flow in the first branch circuit 6 can be adjusted, the second electromagnetic valve 71 is controlled to be conducted, the flow of the refrigerant returning to the compressor 1 is controlled through the adjustment of the opening degree of the valve, and the purpose is to increase the system resistance so as to keep the exhaust temperature constant. The first solenoid valve 61, the second solenoid valve 71, the third solenoid valve 8 and the fourth solenoid valve 91 can only act when defrosting is carried out in the low-temperature area and the ultra-low temperature area, and other temperature areas do not participate in the action.
When the heating mode is operated, referring to fig. 1, the flow path of the refrigerant is: the air outlet 12 of the compressor 1, the first interface 51 of the reversing device 5, the fourth interface 54 of the reversing device 5, the first end 21 of the first heat exchanger 2, the second end 22 of the first heat exchanger 2, the throttling device 4, the fourth end 32 of the second heat exchanger 3, the third end 31 of the second heat exchanger 3, the third electromagnetic valve 8, the second interface 52 of the reversing device 5, the third interface 53 of the reversing device 5, and the air inlet 11 of the compressor 1.
Therefore, when the defrosting mode is operated, the third electromagnetic valve 8 is closed, the second electromagnetic valve 71 is conducted to control the refrigerant returning to the compressor 1, and the refrigerant returns to the compressor 1 through the second electromagnetic valve 71 after heat exchange of the second heat exchanger 3 to form a closed loop; meanwhile, a small amount of high-temperature gas discharged by the compressor 1 flows to the first heat exchanger 2 to blow hot air, so that the air conditioner 100 can be continuously heated in the defrosting mode, and the use comfort of a user can be improved.
The air conditioner 100 according to the embodiment of the second aspect of the present invention employs the air conditioner control method according to the above-described first aspect of the present invention.
According to the air conditioner 100 of the embodiment of the invention, by adopting the air conditioner control method, rapid defrosting can be realized within two minutes, so that indoor temperature fluctuation during defrosting can be reduced, continuous heat supply is realized, and the use comfort of users is improved.
Other configurations and operations of the air conditioner 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
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.
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 (11)

1. An air conditioner control method is characterized by comprising the following steps:
when the defrosting condition is met, controlling the compressor to increase the frequency to a preset defrosting frequency;
and operating the defrosting mode, and turning off the outdoor fan.
2. The air conditioner control method as claimed in claim 1, wherein the compressor passes a first predetermined time t before the defrosting mode is operated1Up-converting to the predetermined defrosting frequency, wherein t1Satisfies the following conditions: t is not more than 120s1≤240s。
3. The air conditioner controlling method according to claim 2, wherein the t is1Further satisfies the following conditions: t is t1＝180s。
4. The air conditioner controlling method as claimed in any one of claims 1 to 3, wherein when the defrosting mode is operated, an indoor fan is controlled to be operated at a low rotation speed.
5. The air conditioner control method according to any one of claims 1-3, wherein when a defrosting exit condition is satisfied, the outdoor fan is turned on, and the compressor is controlled to continue to operate at the predetermined defrosting frequency for a second predetermined time;
and exiting the defrosting mode.
6. The air conditioner controlling method according to claim 5, wherein when the defrosting exit condition is satisfied, the indoor fan is controlled to operate at a high rotation speed.
7. The air conditioner controlling method according to claim 5, wherein the second predetermined time is t2Wherein, the t2Satisfies the following conditions: t is not more than 120s2≤240s。
8. The air conditioner controlling method according to claim 7, wherein the t is2Further satisfies the following conditions: t is t2＝180s。
9. The air conditioner controlling method as claimed in claim 5, wherein the compressor is down-converted to a normal heating frequency to operate when the defrosting mode is exited.
10. The air conditioner control method according to any one of claims 1 to 3, wherein the air conditioner includes a compressor having an air inlet and an air outlet, a first heat exchanger, a second heat exchanger, a throttling device, and a reversing device, the reversing device includes a first port, a second port, a third port, and a fourth port, when one of the first port and the third port is communicated with one of the second port and the fourth port, the other of the first port and the third port is communicated with the other of the second port and the fourth port, the first end of the first heat exchanger is connected to the fourth port, the third end of the second heat exchanger is connected to the second port, the throttling device is connected between the second end of the first heat exchanger and the fourth end of the second heat exchanger,
a first branch is connected between a flow path between the first end and the fourth port and a flow path between the third end and the second port, a first electromagnetic valve is arranged on the first branch, a second branch is connected between the flow path between the third end and the second port and the fourth end, a second electromagnetic valve is arranged on the second branch, a third electromagnetic valve is arranged on the flow path between the third end and the second port, the third electromagnetic valve is positioned on one side of the second branch adjacent to the second heat exchanger, a third branch is connected between the second end and the third end, and a fourth electromagnetic valve is arranged on the third branch;
when the defrosting mode is operated, the first interface is communicated with the fourth interface, the second interface is communicated with the third interface, the first electromagnetic valve, the second electromagnetic valve and the fourth electromagnetic valve are opened, and the third electromagnetic valve is closed.
11. An air conditioner characterized by employing the air conditioner control method according to any one of claims 1 to 10.
CN202010507206.9A 2020-06-05 2020-06-05 Air conditioner and control method thereof Pending CN111720953A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113154637A (en) * 2021-05-18 2021-07-23 宁波奥克斯电气股份有限公司 Defrosting control method and device and air conditioner
CN117404826A (en) * 2023-12-13 2024-01-16 珠海格力电器股份有限公司 Multi-split heat pump unit and control method for balancing water temperature in defrosting process thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87105945A (en) * 1986-12-26 1988-07-06 松下电器产业株式会社 The method for controlling of operation of air conditioner of heat pump type
CN101187517A (en) * 2006-11-17 2008-05-28 海尔集团公司 Air-conditioner defrosting method
CN106940071A (en) * 2017-03-24 2017-07-11 青岛海尔空调器有限总公司 Air-conditioning device and its control method
JP2019100585A (en) * 2017-11-30 2019-06-24 パナソニックＩｐマネジメント株式会社 refrigerator
CN111023454A (en) * 2019-12-24 2020-04-17 海信（广东）空调有限公司 Air conditioner and control method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87105945A (en) * 1986-12-26 1988-07-06 松下电器产业株式会社 The method for controlling of operation of air conditioner of heat pump type
CN101187517A (en) * 2006-11-17 2008-05-28 海尔集团公司 Air-conditioner defrosting method
CN106940071A (en) * 2017-03-24 2017-07-11 青岛海尔空调器有限总公司 Air-conditioning device and its control method
JP2019100585A (en) * 2017-11-30 2019-06-24 パナソニックＩｐマネジメント株式会社 refrigerator
CN111023454A (en) * 2019-12-24 2020-04-17 海信（广东）空调有限公司 Air conditioner and control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113154637A (en) * 2021-05-18 2021-07-23 宁波奥克斯电气股份有限公司 Defrosting control method and device and air conditioner
CN113154637B (en) * 2021-05-18 2022-04-19 宁波奥克斯电气股份有限公司 Defrosting control method and device and air conditioner
CN117404826A (en) * 2023-12-13 2024-01-16 珠海格力电器股份有限公司 Multi-split heat pump unit and control method for balancing water temperature in defrosting process thereof

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Application publication date: 20200929