CN109028464B - Defrosting control method for air conditioner - Google Patents

Defrosting control method for air conditioner Download PDF

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Publication number
CN109028464B
CN109028464B CN201810510579.4A CN201810510579A CN109028464B CN 109028464 B CN109028464 B CN 109028464B CN 201810510579 A CN201810510579 A CN 201810510579A CN 109028464 B CN109028464 B CN 109028464B
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China
Prior art keywords
air conditioner
defrosting
compressor
value
rotating speed
Prior art date
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Application number
CN201810510579.4A
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Chinese (zh)
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CN109028464A (en
Inventor
许文明
王飞
张心怡
罗荣邦
丁爽
袁俊军
李皖皖
李阳
陈可兄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Priority to CN201810510579.4A priority Critical patent/CN109028464B/en
Publication of CN109028464A publication Critical patent/CN109028464A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41Defrosting; Preventing freezing
    • F24F11/42Defrosting; Preventing freezing of outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74Control 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
    • F24F11/77Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • F24F11/84Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87Control 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
    • F24F11/871Control 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to prevent the room temperature from fluctuating too much during defrosting, the method of the invention comprises the following steps: judging whether the air conditioner meets a defrosting condition or not in the process of heating operation of the air conditioner; if yes, before the air conditioner enters the defrosting mode, the exhaust temperature t of the compressor is obtained, and after the preset time interval, the exhaust temperature t of the compressor is obtained again0(ii) a Comparing t and t0And selectively controlling the running frequency of the compressor, the opening degree of the throttle valve or the rotating speed of the fan of the indoor unit and/or the outdoor unit according to the comparison result. The invention is based on t and t before the air conditioner enters the defrosting mode0The comparison result selectively controls the running frequency of the compressor, the opening degree of the throttle valve or the rotating speed of the fan of the indoor unit and/or the outdoor unit to store a part of energy, and the part of energy is supplemented to the indoor during the defrosting process of the air conditioner, so that the overlarge fluctuation of the room temperature during defrosting is effectively prevented.

Description

Defrosting control method for air conditioner
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner.
Background
The air conditioner as a device capable of adjusting the indoor environment temperature has the working principle that: the indoor environment temperature is lowered or raised by the refrigerant switching between the circulation lines through the high pressure/low pressure/gas/liquid state, namely, the air conditioner is in the cooling or heating working condition from the perspective of the indoor unit. When the air conditioner heats the operation, if outdoor coil pipe temperature under certain humidity condition crosses lowly can lead to the condition of frosting, and outdoor coil pipe frosting can lead to outdoor heat exchanger's heat exchange efficiency to reduce, influences the heating effect of air conditioner, reduces indoor environment's travelling comfort, influences user experience. Therefore, in the situation that the air conditioner is in the heating working condition, the outdoor coil of the air conditioner needs to be defrosted timely and effectively.
In the operation and heating process of the existing household air conditioner, whether the air conditioner is in a frosting state can be judged in various modes, for example, the operation time and the temperature of an outdoor coil pipe are used for judging whether defrosting is started or not. When the air conditioner is judged to be in a frosting state, the air conditioner is enabled to enter a defrosting mode, however, the mode easily causes large fluctuation of indoor temperature.
Therefore, the invention provides a new defrosting control method to reduce the influence on the indoor temperature in the defrosting process.
Disclosure of Invention
In order to solve the above problems in the prior art and to prevent the room temperature from fluctuating too much during defrosting, the invention provides a defrosting control method of an air conditioner, which comprises the following steps: judging whether the air conditioner meets a defrosting condition or not in the process of heating operation of the air conditioner; if yes, before the air conditioner enters the defrosting mode, acquiring the exhaust temperature t of the compressor, and acquiring the exhaust temperature t0 of the compressor again after a preset time interval; and comparing t with t0, and selectively controlling the running frequency of the compressor, the opening degree of the throttle valve or the fan rotating speed of the indoor unit and/or the outdoor unit according to the comparison result.
In a preferred embodiment of the above-mentioned air conditioner defrosting control method, the step of "comparing t with t0 and selectively controlling the operation frequency of the compressor, the opening degree of the throttle valve, or the rotation speed of the fan of the indoor unit and/or the outdoor unit according to the comparison result" includes: if t-t 0 is not less than the set value, increasing the running frequency of the compressor; if t-t 0 < the set value, the operation frequency of the compressor is maintained unchanged, the opening degree of the throttle valve is reduced, and/or the fan rotating speed of the indoor unit and/or the outdoor unit is reduced.
In the preferred embodiment of the defrosting control method of the air conditioner, if t-t 0 is more than or equal to the set value, the operating frequency of the compressor is increased by 10 to 15 hz.
In the above-described preferred embodiment of the air conditioner defrost control method, if t-t 0 < the set value, the throttle opening is decreased by 20-40 steps.
In the preferred embodiment of the defrosting control method of the air conditioner, if t-t 0 is less than the set value, the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced by 40-60 rpm.
In the preferred embodiment of the defrosting control method of the air conditioner, if t-t 0 is less than the set value, the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced by 50 rpm.
In a preferred embodiment of the above-mentioned defrosting control method of an air conditioner, the set value is an arbitrary value between 2 and 4.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, the set value is 3.
In a preferred embodiment of the above-mentioned defrosting control method of an air conditioner, the preset time is any time between 25 and 35 seconds.
In a preferred embodiment of the above-described air conditioner defrost control method, the preset time is 30 seconds.
Through the technical scheme of the invention, the device comprises a shell,before the air conditioner enters the defrosting mode, according to t and t0The comparison result selectively controls the running frequency of the compressor, the opening degree of the throttle valve or the rotating speed of the fan of the indoor unit and/or the outdoor unit to store a part of energy, and the part of energy is supplemented to the indoor during the defrosting process of the air conditioner, so that the overlarge fluctuation of the room temperature during defrosting is effectively prevented. As will be understood by those skilled in the art, t and t are defined as0The comparison result is used as a reference, and the corresponding energy storage mode can be accurately selected, so that the fluctuation of the room temperature during defrosting is reduced to the maximum extent.
Drawings
Fig. 1 is a schematic main flow chart of an air conditioner defrosting control method according to the present invention.
Detailed Description
In order to make the embodiments, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the embodiments are some, but not all embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1, the defrost control method of the present invention comprises the steps of: s110, judging whether the air conditioner meets a defrosting condition or not in the heating operation process of the air conditioner; s120, if yes, obtaining the exhaust temperature t of the compressor before the air conditioner enters the defrosting mode, and obtaining the exhaust temperature t of the compressor again after a preset time interval0(ii) a S130, comparing t and t0And selectively controlling the running frequency of the compressor, the opening degree of the throttle valve or the rotating speed of the fan of the indoor unit and/or the outdoor unit according to the comparison result. The preset time may be any time between 25 seconds and 35 seconds, and in this embodiment, the preset time is 30 seconds.
By comparing t with t0Selectively controlling the operation frequency of the compressor, the opening degree of the throttle valve or the rotation speed of the fan of the indoor unit and/or the outdoor unit so as to store a part of energy before defrosting the air conditioner, and thus, before defrosting the air conditionerIn the defrosting process, the stored energy can be supplemented to indoor heating capacity, and the influence of the air conditioner on the indoor temperature in the defrosting process is reduced to a certain extent, so that the condition of overlarge room temperature fluctuation in the defrosting process can be effectively prevented.
In step S110, when determining whether the air conditioner satisfies the defrosting condition, a person skilled in the art may select any known determination method, and the present invention does not limit the specific defrosting condition.
In step S130, if t-t0If the value is more than or equal to the set value, the running frequency of the compressor is increased; if t-t0If the frequency is less than the set value, the operation frequency of the compressor is kept unchanged, the opening degree of the throttle valve is reduced, and/or the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced. The set value may be any value between 2 and 4, and in this embodiment, the set value is 3.
As an example, when t-t0And when the frequency is more than or equal to 3, increasing the running frequency of the compressor by 10-15 hz. As will be understood by those skilled in the art, during the defrosting process of the air conditioner, the heating capacity of the room is reduced, and if a part of energy is stored in the compressor after the frequency of the compressor is increased before the defrosting process is performed, the part of energy is replenished into the room during the defrosting process of the air conditioner, thereby effectively preventing the temperature fluctuation of the room during the defrosting process from being too large.
As an example, when t-t0If the opening is less than 3, reducing the opening of the throttle valve by 20-40 steps; or the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced by 40-60rpm, preferably by 50 rpm. In this way, a part of energy can be stored before entering into defrosting, and then the part of energy is replenished into the room during the defrosting process of the air conditioner, so that the excessive fluctuation of the room temperature during defrosting is effectively prevented.
In summary, according to the technical scheme of the invention, before the air conditioner enters the defrosting mode, the defrosting mode is started according to t and t0Selectively controlling the operation frequency of the compressor, the opening degree of the throttle valve or the rotation speed of the fan of the indoor unit and/or the outdoor unit to store a part of energy according to the comparison result, wherein the part of energy is stored during the defrosting process of the air conditionerPart of energy is supplemented to the indoor again, thereby effectively preventing the temperature fluctuation of the room from being too large during defrosting. As will be understood by those skilled in the art, t and t are defined as0The comparison result is used as a reference, and the corresponding energy storage mode can be accurately selected, so that the fluctuation of the room temperature during defrosting is reduced to the maximum extent.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (9)

1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
judging whether the air conditioner meets a defrosting condition or not in the process of heating operation of the air conditioner;
if yes, before the air conditioner enters the defrosting mode, the exhaust temperature t of the compressor is obtained, and after the preset time interval, the exhaust temperature t of the compressor is obtained again0
Comparing t and t0Selectively controlling the running frequency and the opening degree of a throttle valve of the compressor or the rotating speed of a fan of the indoor unit and/or the outdoor unit according to the comparison result;
if t-t0If the value is more than or equal to the set value, the running frequency of the compressor is increased;
if t-t0If the frequency is less than the set value, the operation frequency of the compressor is kept unchanged, the opening degree of the throttle valve is reduced, and/or the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced.
2. The defrosting control method of an air conditioner according to claim 1, wherein if t-t is the threshold value0And if the frequency is more than or equal to the set value, the running frequency of the compressor is increased by 10 to 15 hz.
3. The defrosting control method of an air conditioner according to claim 1, wherein if t-t is the threshold value0If the throttle valve opening is smaller than the set value, the throttle valve opening is reduced by 20-40 steps.
4. The defrosting control method of an air conditioner according to claim 1, wherein if t-t is the threshold value0If the rotating speed is less than the set value, the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced by 40-60 rpm.
5. The defrosting control method of an air conditioner according to claim 4, wherein if t-t is reached0If the rotating speed is less than the set value, the rotating speed of the fan of the indoor unit and/or the outdoor unit is reduced by 50 rpm.
6. The air conditioner defrost control method of any one of claims 1-5, wherein the set value is any value between 2-4.
7. The air conditioner defrost control method of claim 6, wherein the set value is 3.
8. The air conditioner defrost control method of any one of claims 1-5, wherein the preset time is any time between 25-35 seconds.
9. The air conditioner defrost control method of claim 8, wherein the preset time is 30 seconds.
CN201810510579.4A 2018-05-24 2018-05-24 Defrosting control method for air conditioner Active CN109028464B (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110940122B (en) * 2019-12-16 2021-11-23 宁波奥克斯电气股份有限公司 Defrosting control method and device and air source heat pump
CN111425992B (en) * 2020-04-13 2021-03-26 珠海格力电器股份有限公司 Air conditioner defrosting control method and device, storage medium and air conditioner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828932A (en) * 1994-07-13 1996-02-02 Tokyo Electric Power Co Inc:The Thermal storage type air conditioner
CN101871675A (en) * 2009-04-24 2010-10-27 日立空调·家用电器株式会社 Air conditioner
CN102401428A (en) * 2010-09-09 2012-04-04 松下电器产业株式会社 Air conditioner
CN102449408A (en) * 2009-05-29 2012-05-09 大金工业株式会社 Air-conditioning device
CN106524445A (en) * 2017-01-10 2017-03-22 美的集团武汉制冷设备有限公司 Control method and system of air conditioner and air conditioner
CN107166639A (en) * 2017-05-10 2017-09-15 青岛海尔空调器有限总公司 A kind of air conditioner defrosting control method, control device and air conditioner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828932A (en) * 1994-07-13 1996-02-02 Tokyo Electric Power Co Inc:The Thermal storage type air conditioner
CN101871675A (en) * 2009-04-24 2010-10-27 日立空调·家用电器株式会社 Air conditioner
CN102449408A (en) * 2009-05-29 2012-05-09 大金工业株式会社 Air-conditioning device
CN102401428A (en) * 2010-09-09 2012-04-04 松下电器产业株式会社 Air conditioner
CN106524445A (en) * 2017-01-10 2017-03-22 美的集团武汉制冷设备有限公司 Control method and system of air conditioner and air conditioner
CN107166639A (en) * 2017-05-10 2017-09-15 青岛海尔空调器有限总公司 A kind of air conditioner defrosting control method, control device and air conditioner

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Effective date of registration: 20201106

Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China

Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd.

Patentee after: Haier Zhijia Co.,Ltd.

Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China

Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd.