CN109028465B - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
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- CN109028465B CN109028465B CN201810528036.5A CN201810528036A CN109028465B CN 109028465 B CN109028465 B CN 109028465B CN 201810528036 A CN201810528036 A CN 201810528036A CN 109028465 B CN109028465 B CN 109028465B
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- air conditioner
- set value
- defrosting
- control method
- 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
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- 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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- 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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
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 indoor environment temperature and the compressor exhaust temperature t are obtained, and the compressor exhaust temperature t is obtained again after the preset time interval0(ii) a Selectively controlling the running frequency of the compressor, the opening degree of a throttle valve or the rotating speed of a fan of the indoor unit and/or the outdoor unit according to the values of pn and delta t; wherein pn is a preset temperature-outdoor ambient temperature; t-t ═ t0. According to the invention, before the air conditioner enters the defrosting mode, a part of energy is stored, and in the defrosting process of the air conditioner, the part of energy is replenished to the indoor space, so that the excessive temperature fluctuation of the room during defrosting is effectively prevented.
Description
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 a defrosting mode, the indoor environment temperature and the compressor exhaust temperature t are obtained, and the compressor exhaust temperature t0 is obtained again after a preset time interval; selectively controlling the running frequency of the compressor, the opening degree of a throttle valve or the rotating speed of a fan of the indoor unit and/or the outdoor unit according to the values of pn and delta t; wherein pn is a preset temperature-indoor environment temperature; and t-t 0.
In a preferred embodiment of the above-described air conditioner defrosting control method, the step of selectively controlling the operating frequency of the compressor, the throttle opening, or the fan rotation speed of the indoor unit and/or the outdoor unit according to the values of pn and Δ t includes: if pn is larger than or equal to a first set value and delta t is larger than or equal to a second set value, the operating frequency of the compressor is increased; and if pn is less than the first set value or delta t is less than the second set value, maintaining the operation frequency of the compressor unchanged, reducing the opening degree of the throttle valve and/or reducing the fan rotating speed of the indoor unit and/or the outdoor unit.
In the preferred embodiment of the defrosting control method of the air conditioner, if pn is more than or equal to a first set value and delta t is more than or equal to a second set value, the operating frequency of the compressor is increased by 10 to 15 hz.
In a preferred embodiment of the above-described air conditioner defrost control method, if pn < the first set value, or Δ t < the second set value, the throttle opening is decreased by 20-40 steps.
In a preferred embodiment of the above-mentioned defrosting control method for an air conditioner, if pn < a first set value, or Δ t < a second set value, the fan rotational speed of the indoor unit and/or the outdoor unit is reduced by 40-60 rpm.
In a preferred embodiment of the above-mentioned defrosting control method for an air conditioner, if pn < a first set value, or Δ t < a second set value, the fan rotational speed of the indoor unit and/or the outdoor unit is decreased by 50 rpm.
In a preferred embodiment of the above defrosting control method of an air conditioner, the first set value is an arbitrary value between 0 and 2; and/or the second set value is any value between 2 and 4.
In a preferred embodiment of the above defrosting control method of an air conditioner, the first set value is 1; and/or the second 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 defrosting control method for an air conditioner, the preset time is 30 seconds; and/or the preset temperature can be selected in the range of 16-30 ℃.
According to the technical scheme of the invention, before the air conditioner enters the defrosting mode, 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 are selectively controlled according to the values of pn and delta t to store a part of energy, and the part of energy is supplemented to the indoor unit in the defrosting process of the air conditioner, so that the overlarge fluctuation of the room temperature during defrosting is effectively prevented. It will be appreciated by those skilled in the art that by taking the values of pn and Δ t as references, the corresponding energy storage mode can be selected accurately, thereby minimizing fluctuations in room temperature during defrost.
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, before the air conditioner enters the defrosting mode, the indoor environment temperature and the compressor exhaust temperature t are obtained, and the compressor exhaust temperature t is obtained again after the preset time interval0(ii) a And S130, 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 pn and the delta t values. Wherein pn is a preset temperature-indoor environment temperature; t-t ═ t0. In the present embodiment, the preset time may be any time between 25 and 35 seconds, and preferably, the preset time is 30 seconds. The preset temperature may be set by a user-defined setting, for example, to a temperature between 16-30 ℃.
In the above steps S110 to S130, the operating frequency of the compressor, the opening degree of the throttle valve, or the rotational speed of the fan of the indoor unit and/or the outdoor unit is selectively controlled according to the values of pn and Δ t, so that a part of the energy is stored before the air conditioner performs defrosting, and thus, the stored part of the energy can be supplemented to the heating capacity of the room during defrosting, and the influence of the air conditioner on the indoor temperature during defrosting is reduced to a certain extent, thereby effectively preventing the occurrence of the situation that the room temperature fluctuates too much during defrosting.
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 pn is greater than or equal to the first set value and Δ t is greater than or equal to the second set value, the operating frequency of the compressor is increased; and if pn is less than the first set value or delta t is less than the second set value, maintaining the operation frequency of the compressor unchanged, reducing the opening degree of the throttle valve and/or reducing the fan rotating speed of the indoor unit and/or the outdoor unit. The first set value may be any value between 0 and 2, and the second set value may be any value between 2 and 4, in this embodiment, the first set value is 1, and the second set value is 3.
As an example, when pn ≧ 1 and Δ t ≧ 3, the operating frequency of the compressor is raised 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 pn < 1, or Δ t < 3, the throttle opening is decreased 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 solution of the present invention, before the air conditioner enters the defrosting mode, the operating frequency of the compressor, the opening degree of the throttle valve, or the rotational speed of the fan of the indoor unit and/or the outdoor unit is selectively controlled according to the values of pn and Δ t to store a part of energy, and during the defrosting process of the air conditioner, the part of energy is replenished into the room, thereby effectively preventing the room temperature from fluctuating too much during defrosting. It will be appreciated by those skilled in the art that by taking the values of pn and Δ t as references, the corresponding energy storage mode can be selected accurately, thereby minimizing fluctuations in room temperature during defrost.
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 indoor environment temperature and the compressor exhaust temperature t are obtained, and the compressor exhaust temperature t is obtained again after the preset time interval0；
Selectively controlling the running frequency of the compressor, the opening degree of a throttle valve or the rotating speed of a fan of the indoor unit and/or the outdoor unit according to the values of pn and delta t;
if pn is larger than or equal to a first set value and delta t is larger than or equal to a second set value, the operating frequency of the compressor is increased;
if pn is less than the first set value or delta t is less than the second 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;
wherein pn is a preset temperature-indoor environment temperature; t-t ═ t0。
2. The air conditioner defrost control method of claim 1, wherein if pn is greater than or equal to a first set value and Δ t is greater than or equal to a second set value, the operating frequency of the compressor is increased by 10-15 hz.
3. The air conditioner defrost control method of claim 1, wherein if pn < a first set value, or Δ t < a second set value, the throttle opening is decreased by 20-40 steps.
4. The defrosting control method of an air conditioner according to claim 1, wherein if pn < the first set value or Δ t < the second set value, the fan rotation speed of the indoor unit and/or the outdoor unit is decreased by 40-60 rpm.
5. The defrosting control method of an air conditioner according to claim 4, wherein if pn < the first set value or Δ t < the second set value, the fan rotation speed of the indoor unit and/or the outdoor unit is decreased by 50 rpm.
6. The air conditioner defrost control method of any one of claims 1-5, wherein the first set value is any value between 0-2; and/or
The second set value is any value between 2 and 4.
7. The air conditioner defrost control method of claim 6, wherein the first set value is 1; and/or
The second 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; and/or
The preset temperature can be selected within the range of 16-30 ℃.
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| CN201810528036.5A CN109028465B (en) | 2018-05-24 | 2018-05-24 | Defrosting control method for air conditioner |
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| CN201810528036.5A CN109028465B (en) | 2018-05-24 | 2018-05-24 | Defrosting control method for air conditioner |
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| CN109028465B true CN109028465B (en) | 2021-04-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442475B (en) * | 2020-04-10 | 2022-03-18 | 海信（山东）空调有限公司 | Defrosting control method and device of air conditioning system and air conditioner |
| CN111578458B (en) * | 2020-05-13 | 2022-03-01 | Tcl空调器(中山)有限公司 | Control method of air conditioner, air conditioner and computer storage medium |
| CN112797570B (en) * | 2020-12-30 | 2022-08-23 | 宁波奥克斯电气股份有限公司 | Defrosting control method, defrosting device and multi-connected air conditioning system |
| CN115095955B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
| CN115031352B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
| CN115095956B (en) * | 2022-06-30 | 2023-07-25 | 海信空调有限公司 | Air conditioner and defrosting control method thereof |
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2018
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08261541A (en) * | 1995-03-27 | 1996-10-11 | Mitsubishi Heavy Ind Ltd | Heat pump type air conditioner |
| KR20040041442A (en) * | 2002-11-11 | 2004-05-17 | 삼성전자주식회사 | Operation method for defrosting evaporator in air conditioner |
| CN102449408A (en) * | 2009-05-29 | 2012-05-09 | 大金工业株式会社 | Air-conditioning device |
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