CN108775741B - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
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- CN108775741B CN108775741B CN201810508118.3A CN201810508118A CN108775741B CN 108775741 B CN108775741 B CN 108775741B CN 201810508118 A CN201810508118 A CN 201810508118A CN 108775741 B CN108775741 B CN 108775741B
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- air conditioner
- defrosting
- control method
- set value
- indoor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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 overlarge fluctuation of the room temperature during defrosting, the defrosting control method of the air conditioner provided by 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, acquiring the indoor environment temperature before the air conditioner enters the defrosting mode; and comparing the indoor environment temperature with a preset temperature, and selectively controlling the running frequency of the compressor, the opening 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 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 based on the difference value between the preset temperature and the indoor environment temperature, and the part of energy is supplemented to the indoor unit in the defrosting process of the air conditioner, thereby effectively preventing the overlarge fluctuation of the room temperature in the defrosting process.
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, acquiring the indoor environment temperature before the air conditioner enters the defrosting mode; and comparing the indoor environment temperature with a preset temperature, and selectively controlling the running frequency of the compressor, the opening 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.
In a preferred embodiment of the above-mentioned defrosting control method for an air conditioner, the step of comparing the indoor ambient temperature with a preset temperature and selectively controlling 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 according to the comparison result includes: calculating the difference pn as the preset temperature-indoor environment temperature; if the pn is larger than or equal to the set value, the running frequency of the compressor is increased; if pn < 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.
In the preferred embodiment of the defrosting control method of the air conditioner, if pn is more than or equal to the 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 set value, the throttle opening is decreased by 20-40 steps.
In a preferred embodiment of the above-mentioned defrosting control method of an air conditioner, if pn < a set value, the rotation speed of the fan of the indoor unit and/or the outdoor unit is reduced by 40-60 rpm.
In a preferred embodiment of the above-described air conditioner defrost control method, if pn < a set value, the fan rotation speed of the indoor unit and/or the outdoor unit is reduced by 50 rpm.
In a preferred embodiment of the above-described air conditioner defrost control method, the set value is an arbitrary value between 0 and 2.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, the set value is 1.
In a preferred embodiment of the above-described air conditioner defrost control method, the preset temperature can be selected within a range of 16-30 ℃.
According to the technical scheme, before the air conditioner enters the defrosting mode, the running frequency and the opening degree of the throttle valve of the compressor or the rotating speed of the fan of the indoor unit and/or the outdoor unit are selectively controlled based on the difference value between the preset temperature and the indoor environment temperature 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 can be understood by those skilled in the art that the difference between the preset temperature and the indoor ambient temperature is used as a reference value, and the corresponding energy storage mode can be accurately selected, so that the fluctuation of the room temperature during defrosting can be minimized.
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, acquiring the indoor environment temperature before the air conditioner enters the defrosting mode; and S130, comparing the indoor environment temperature with a preset temperature, 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. The preset temperature can be set by a user in a self-defined way, and the preset temperature can be set to be between 16 and 30 ℃ in general. Through steps S110 to S130, the operating frequency of the compressor, the opening of the throttle valve, or the rotational speed of the fan of the indoor unit and/or the outdoor unit is selectively controlled based on the indoor ambient temperature and the preset temperature, so that a part of energy is stored before the air conditioner performs defrosting, and thus, the stored part of energy can be supplemented to the indoor heating amount 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, calculating the difference pn equal to a preset temperature — an indoor ambient temperature; if the pn is larger than or equal to the set value, the running frequency of the compressor is increased; if pn < 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 0 and 2, and in this embodiment, the set value is 1.
As an example, when pn ≧ 1, 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, 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 scheme 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 rotation speed of the fan of the indoor unit and/or the outdoor unit is selectively controlled based on the difference between the preset temperature and the indoor environment temperature to store a part of energy, and the part of energy is replenished to the indoor unit during the defrosting process of the air conditioner, so that the excessive fluctuation of the room temperature during defrosting is effectively prevented. It can be understood by those skilled in the art that the difference between the preset temperature and the indoor ambient temperature is used as a reference value, and the corresponding energy storage mode can be accurately selected, so that the fluctuation of the room temperature during defrosting can be minimized.
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. 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, acquiring the indoor environment temperature before the air conditioner enters the defrosting mode;
comparing the indoor environment temperature with a preset temperature, and selectively controlling the running frequency and the opening of a throttle valve of a compressor or the rotating speed of a fan of an indoor unit and/or an outdoor unit according to a comparison result;
wherein, the steps specifically include:
calculating the difference pn as the preset temperature-indoor environment temperature;
if the pn is larger than or equal to the set value, the running frequency of the compressor is increased;
if pn < 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 air conditioner defrost control method of claim 1, wherein the operating frequency of the compressor is increased by 10-15hz if pn ≧ a set value.
3. The air conditioner defrost control method of claim 1, wherein the throttle opening is decreased by 20-40 steps if pn < a set value.
4. The defrosting control method of an air conditioner according to claim 1, wherein if pn < a set value, the fan rotation speed of the indoor unit and/or the outdoor unit is reduced by 40-60 rpm.
5. The air conditioner defrost control method of claim 4, wherein if pn < a set value, a fan rotation speed of the indoor and/or 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 0-2.
7. The air conditioner defrost control method of claim 6, wherein the set value is 1.
8. The air conditioner defrost control method of any one of claims 1-5, wherein the preset temperature is selectable in a range of 16-30 ℃.
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| CN201810508118.3A CN108775741B (en) | 2018-05-24 | 2018-05-24 | Defrosting control method for air conditioner |
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| CN108775741B true CN108775741B (en) | 2020-09-25 |
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Citations (7)
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|---|---|---|---|---|
| JPH08291957A (en) * | 1995-04-20 | 1996-11-05 | Fujitsu General Ltd | Air conditioner |
| CN101187516A (en) * | 2006-11-17 | 2008-05-28 | 海尔集团公司 | Air-conditioner defrosting method |
| CN102449408B (en) * | 2009-05-29 | 2014-07-30 | 大金工业株式会社 | Air-conditioning device |
| CN104501350A (en) * | 2014-11-17 | 2015-04-08 | 广东美的制冷设备有限公司 | Air conditioner control method and air conditioner |
| CN105571223A (en) * | 2016-02-29 | 2016-05-11 | 青岛海尔空调器有限总公司 | Defrosting method for constant-frequency air conditioner |
| CN105674648A (en) * | 2016-04-01 | 2016-06-15 | 珠海格力电器股份有限公司 | Heating-based defrost control method of multi-split air-conditioning system |
| JP2018159524A (en) * | 2017-03-23 | 2018-10-11 | 株式会社コロナ | Integrated air conditioner |
-
2018
- 2018-05-24 CN CN201810508118.3A patent/CN108775741B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08291957A (en) * | 1995-04-20 | 1996-11-05 | Fujitsu General Ltd | Air conditioner |
| CN101187516A (en) * | 2006-11-17 | 2008-05-28 | 海尔集团公司 | Air-conditioner defrosting method |
| CN102449408B (en) * | 2009-05-29 | 2014-07-30 | 大金工业株式会社 | Air-conditioning device |
| CN104501350A (en) * | 2014-11-17 | 2015-04-08 | 广东美的制冷设备有限公司 | Air conditioner control method and air conditioner |
| CN105571223A (en) * | 2016-02-29 | 2016-05-11 | 青岛海尔空调器有限总公司 | Defrosting method for constant-frequency air conditioner |
| CN105674648A (en) * | 2016-04-01 | 2016-06-15 | 珠海格力电器股份有限公司 | Heating-based defrost control method of multi-split air-conditioning system |
| JP2018159524A (en) * | 2017-03-23 | 2018-10-11 | 株式会社コロナ | Integrated air conditioner |
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Effective date of registration: 20201028 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. |