CN110836495B - Air conditioner frosting control method - Google Patents

Air conditioner frosting control method Download PDF

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Publication number
CN110836495B
CN110836495B CN201810941821.3A CN201810941821A CN110836495B CN 110836495 B CN110836495 B CN 110836495B CN 201810941821 A CN201810941821 A CN 201810941821A CN 110836495 B CN110836495 B CN 110836495B
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China
Prior art keywords
fan
air conditioner
revolutions
preset
frosting
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CN201810941821.3A
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Chinese (zh)
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CN110836495A (en
Inventor
许文明
罗荣邦
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Priority to CN201810941821.3A priority Critical patent/CN110836495B/en
Publication of CN110836495A publication Critical patent/CN110836495A/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
    • F24F11/50Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • F25B47/022Defrosting cycles hot gas defrosting
    • F25B47/025Defrosting cycles hot gas defrosting by reversing the cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/20Heat-exchange fluid temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2347/00Details for preventing or removing deposits or corrosion
    • F25B2347/02Details of defrosting cycles

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to a frosting control method of an air conditioner. In order to ensure the frosting uniformity of the air conditioner and improve the defrosting efficiency, the defrosting control method of the air conditioner provided by the invention aims at the air conditioner with double fans arranged on an outdoor unit, and the method comprises the following steps: detecting the temperature t of the upper part of the outer coil pipe in the heating operation process of the air conditionerOn the upper partAnd the temperature t of the lower part of the outer coilLower part(ii) a At tOn the upper partDew point temperature t ≤ andlower partDetecting the current I of the upper fan under the condition of not more than the dew point temperatureOn the upper partAnd current I of lower fanLower part(ii) a If IOn the upper part>ILower partControlling the rotating speed of the lower fan to increase by a first preset number of revolutions; if IOn the upper part<ILower partControlling the rotating speed of the upper fan to increase by a first preset number of revolutions; if IOn the upper part=ILower partAnd controlling the rotating speeds of the upper fan and the lower fan to be equal. The invention can reasonably control the frosting uniformity, so that the outer machine frosts more uniformly, the frosting uniformity is favorable for defrosting, and the defrosting efficiency is also improved.

Description

Air conditioner frosting control method
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a frosting 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.
Because the frosting speed and thickness of the outdoor unit are influenced by the temperature and the wind speed of the external coil, and the split flow of the outdoor heat exchanger cannot be completely consistent, the non-uniformity of the temperature of the external coil is inevitably caused when the wind speed is the same, the phenomenon of non-uniform frosting of the external coil is caused, and the defrosting efficiency of the air conditioner is further influenced.
Therefore, the present invention provides a frost formation control method for an air conditioner to solve the above problems.
Disclosure of Invention
Based on the above problems in the background art, in order to ensure the uniformity of the air conditioner frosting and improve the defrosting efficiency, the invention provides a method for controlling the air conditioner frosting, wherein an outdoor unit of the air conditioner comprises an upper fan and a lower fan, and the method comprises the following steps: the method comprises the following steps: detecting the temperature t of the upper part of the outer coil pipe in the heating operation process of the air conditionerOn the upper partAnd the temperature t of the lower part of the outer coilLower part(ii) a At tOn the upper partDew point temperature t ≤ andlower partDetecting the current I of the upper fan under the condition of not more than the dew point temperatureOn the upper partAnd current I of lower fanLower part(ii) a If IOn the upper part>ILower partControlling the rotating speed of the lower fan to increase by a first preset number of revolutions; if IOn the upper part<ILower partControlling the rotating speed of the upper fan to increase by a first preset number of revolutions; if IOn the upper part=ILower partAnd controlling the rotating speeds of the upper fan and the lower fan to be equal.
In a preferred embodiment of the above air conditioner frosting control method, the method further comprises: at tOn the upper partDew point temperature and tLower partIn the case of dew point temperature, if tOn the upper part>tLower partIncreasing the rotating speed of the lower fan by a first preset valueThe number of revolutions.
In a preferred embodiment of the above air conditioner frosting control method, the first preset number of revolutions is an arbitrary value between 40 and 60 revolutions.
In a preferred embodiment of the above air conditioner frost formation control method, the first preset number of revolutions is 50 revolutions.
In a preferred embodiment of the above air conditioner frosting control method, the method further comprises: at tOn the upper partDew point temperature and tLower partWhen the dew point temperature is higher than the dew point temperature, after the lower fan increases a first preset revolution, the t is compared again after a preset timeOn the upper partAnd tOn the upper part(ii) a If t isOn the upper part>tLower partIncreasing the rotating speed of the lower fan by a second preset revolution; otherwise, the lower fan maintains the current rotating speed.
In a preferred embodiment of the above air conditioner frosting control method, the second preset number of revolutions is an arbitrary value between 40 and 60 revolutions.
In a preferred embodiment of the above air conditioner frost formation control method, the second preset number of revolutions is 50 revolutions.
In a preferred embodiment of the above air conditioner frosting control method, the preset time is any time between 110 and 130 seconds.
In a preferred embodiment of the above air conditioner frosting control method, the preset time is 120 seconds.
The invention balances the unevenness of the temperature point of the outer coil of the outdoor heat exchanger by controlling the wind speeds of different areas of the outer coil, thereby reasonably controlling the frosting uniformity, leading the frosting of the outer machine to be more uniform, being uniform and beneficial to defrosting, and also improving the defrosting efficiency. Due to the temperature t of the upper part of the outer coilOn the upper partAnd the temperature t of the lower part of the outer coilLower partThe frosting condition of the outer coil pipe can be reflected, under the condition that the air conditioner begins to frost, the current of the upper fan and the current of the lower fan can be different, the difference reflects the frosting condition of different areas of the outer coil pipe, therefore, the frosting condition of different areas of the outer coil pipe can be judged by comparing the current of the upper fan and the current of the lower fan, and the frosting condition of different areas of the outer coil pipe can be controlled according to the differenceThe frosting difference is eliminated by the rotating speed of the upper fan or the lower fan, so that the outer machine frosts more uniformly.
Drawings
Fig. 1 is a flowchart of an air conditioner frosting control method of 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.
The defrosting control method of the invention mainly aims at the air conditioner with double fans arranged on an outdoor unit. Specifically, the present invention is directed to an air conditioner, in which an outdoor unit includes an upper fan and a lower fan, and the upper fan and the lower fan may independently rotate in forward or reverse directions.
Referring first to fig. 1, fig. 1 is a flowchart of an air conditioner frosting control method of the present invention. As shown in fig. 1, the method of the present invention comprises: s110, detecting the temperature t of the upper part of the outer coil pipe in the heating operation process of the air conditionerOn the upper partAnd the temperature t of the lower part of the outer coilLower part(ii) a S120, at tOn the upper partDew point temperature t ≤ andlower partDetecting the current I of the upper fan under the condition of not more than the dew point temperatureOn the upper partAnd current I of lower fanLower part(ii) a S130, if IOn the upper part>ILower partControlling the rotating speed of the lower fan to increase by a first preset number of revolutions; s140, if IOn the upper part<ILower partControlling the rotating speed of the upper fan to increase by a first preset number of revolutions; s150, if IOn the upper part=ILower partAnd controlling the rotating speeds of the upper fan and the lower fan to be equal. As an example, the first preset number of revolutions may be 50 revolutions, or the first preset number of revolutions may be any value between 40-60 revolutions.
It will be understood by those skilled in the art that the speed and thickness of the frost formation of the outdoor unit is affected by the temperature and wind speed of the external coil, and the split flow of the outdoor heat exchanger cannot be completely uniformWhen the wind speed is the same, the temperature of the outer coil is not uniform, and the phenomenon of non-uniform frosting of the outer coil is caused, so that the defrosting efficiency of the air conditioner is influenced. Therefore, the invention balances the unevenness of the temperature point of the outer coil of the outdoor heat exchanger by controlling the wind speeds of different areas of the outer coil, and further reasonably controls the frosting uniformity, so that the frosting of the outer machine is more uniform, the frosting uniformity is favorable for defrosting, and the defrosting efficiency is also improved. In addition, due to the temperature t of the upper part of the outer coilOn the upper partAnd the temperature t of the lower part of the outer coilLower partThe frosting condition of the outer coil pipe can be reflected, under the state that the air conditioner begins to frost, the current of the upper fan and the current of the lower fan can be different, the difference reflects the frosting condition of different areas of the outer coil pipe, therefore, the frosting condition of different areas of the outer coil pipe can be judged by comparing the current of the upper fan and the current of the lower fan, and the frosting difference is eliminated by controlling the rotating speed of the upper fan or the lower fan according to the difference, so that the frosting of the outer unit is more uniform.
Further, the method of the present invention further comprises: at tOn the upper partDew point temperature and tLower partIn the case of dew point temperature, if tOn the upper part>tLower partAnd increasing the rotating speed of the lower fan by a first preset number of revolutions. And, at tOn the upper partDew point temperature and tLower partWhen the dew point temperature is higher than the dew point temperature, after the lower fan increases the first preset revolution, the t is compared again after the preset timeOn the upper partAnd tOn the upper part(ii) a If t isOn the upper part>tLower partIncreasing the rotating speed of the lower fan by a second preset revolution; otherwise, the lower fan maintains the current rotating speed. As an example, the preset time may be 120 seconds, or any time between 110 and 130 seconds; the second predetermined number of revolutions may be 50 revolutions, or the second predetermined number of revolutions may be any number of revolutions between 40 and 60 revolutions.
In conclusion, the invention balances the unevenness of the temperature point of the outer coil of the outdoor heat exchanger by controlling the wind speeds of different areas of the outer coil, thereby reasonably controlling the frosting uniformity, leading the frosting of the outer unit to be more uniform, being beneficial to defrosting due to the uniform frosting, and also improving the defrosting efficiency. Due to the upper part of the outer coil pipeTemperature tOn the upper partAnd the temperature t of the lower part of the outer coilLower partThe frosting condition of the outer coil pipe can be reflected, under the state that the air conditioner begins to frost, the current of the upper fan and the current of the lower fan can be different, the difference reflects the frosting condition of different areas of the outer coil pipe, therefore, the frosting condition of different areas of the outer coil pipe can be judged by comparing the current of the upper fan and the current of the lower fan, and the frosting difference is eliminated by controlling the rotating speed of the upper fan or the lower fan according to the difference, so that the frosting of the outer unit is more uniform.
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 (8)

1. An air conditioner frosting control method is characterized in that the method comprises the following steps:
detecting the temperature t of the upper part of the outer coil pipe in the heating operation process of the air conditionerOn the upper partAnd the temperature t of the lower part of the outer coilLower part
At tOn the upper partDew point temperature t ≤ andlower partDetecting the current I of the upper fan under the condition of not more than the dew point temperatureOn the upper partAnd current I of lower fanLower part
If IOn the upper part>ILower partControlling the rotating speed of the lower fan to increase by a first preset number of revolutions;
if IOn the upper part<ILower partControlling the rotating speed of the upper fan to increase by a first preset number of revolutions;
if IOn the upper part=ILower partControlling the rotating speeds of the upper fan and the lower fan to be equal;
at tOn the upper partDew point temperature and tLower partIn the case of dew point temperature, if tOn the upper part>tLower partAnd increasing the rotating speed of the lower fan by a first preset number of revolutions.
2. The air conditioner frost control method of claim 1, wherein the first preset number of revolutions is any value between 40-60 revolutions.
3. The air conditioner frost formation control method of claim 2, wherein the first preset number of revolutions is 50 revolutions.
4. The air conditioner frost control method of claim 3, further comprising:
at tOn the upper partDew point temperature and tLower partWhen the dew point temperature is higher than the dew point temperature, after the lower fan increases a first preset revolution, the t is compared again after a preset timeOn the upper partAnd tOn the upper part
If t isOn the upper part>tLower partIncreasing the rotating speed of the lower fan by a second preset revolution;
otherwise, the lower fan maintains the current rotating speed.
5. The air conditioner frost control method of claim 4, wherein the second preset number of revolutions is any value between 40-60 revolutions.
6. The air conditioner frost control method of claim 5, wherein the second preset number of revolutions is 50 revolutions.
7. The air conditioner frost formation control method as claimed in claim 6, wherein the predetermined time is any time between 110 and 130 seconds.
8. The air conditioner frost control method of claim 7, wherein the preset time is 120 seconds.
CN201810941821.3A 2018-08-17 2018-08-17 Air conditioner frosting control method Active CN110836495B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201810941821.3A CN110836495B (en) 2018-08-17 2018-08-17 Air conditioner frosting control method

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CN110836495B true CN110836495B (en) 2021-10-29

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6441782A (en) * 1987-08-07 1989-02-14 Toshiba Corp Heat pump type air conditioner
CN104515330A (en) * 2013-09-27 2015-04-15 海尔集团公司 Method for controlling defrosting operation of air-conditioner
CN104807132A (en) * 2014-01-23 2015-07-29 珠海格力电器股份有限公司 Defrosting control method and device
CN107328026A (en) * 2017-07-31 2017-11-07 珠海格力电器股份有限公司 Blower control method and device, air-conditioner outdoor unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6441782A (en) * 1987-08-07 1989-02-14 Toshiba Corp Heat pump type air conditioner
CN104515330A (en) * 2013-09-27 2015-04-15 海尔集团公司 Method for controlling defrosting operation of air-conditioner
CN104807132A (en) * 2014-01-23 2015-07-29 珠海格力电器股份有限公司 Defrosting control method and device
CN107328026A (en) * 2017-07-31 2017-11-07 珠海格力电器股份有限公司 Blower control method and device, air-conditioner outdoor unit

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Effective date of registration: 20210910

Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao

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

Applicant after: Haier Zhijia Co.,Ltd.

Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao

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

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