CN110836504A - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
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- CN110836504A CN110836504A CN201810941886.8A CN201810941886A CN110836504A CN 110836504 A CN110836504 A CN 110836504A CN 201810941886 A CN201810941886 A CN 201810941886A CN 110836504 A CN110836504 A CN 110836504A
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- air conditioner
- defrosting
- time
- control method
- temperature
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Classifications
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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
- F24F11/50—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
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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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- 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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of 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 improve the defrosting efficiency of the air conditioner, the defrosting control method of the air conditioner provided by the invention is directed to the air conditioner with a bypass defrosting loop, and the method comprises the following steps: when the air conditioner enters a bypass defrosting mode, acquiring defrosting operation time T and exhaust temperature T; when T is more than or equal to a first preset time and T is less than or equal to a preset temperature, judging whether the condition of quitting defrosting is met; if not, the air conditioner is switched to a reverse cycle defrosting mode. The invention can judge the defrosting efficiency of the air conditioner according to the defrosting operation time and the exhaust temperature of the air conditioner in the bypass defrosting mode, and once the defrosting efficiency is poor and the frost layer is not removed, the reverse circulation defrosting is switched to improve the defrosting efficiency of the air conditioner.
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 prior art, an air conditioner basically adopts reverse cycle defrosting (i.e., the outdoor unit is defrosted by switching the direction of a four-way valve) or bypass defrosting (the outdoor unit is defrosted by opening a bypass branch), and whether to quit defrosting is judged by monitoring defrosting time or certain parameters such as the temperature of an external coil pipe. And lack the auxiliary means in the defrosting process and accelerate defrosting efficiency, lead to current defrosting process singleness, efficiency is lower.
Therefore, there is a need in the art for a new defrost control method to improve the defrost efficiency of an air conditioner.
Disclosure of Invention
In view of the above problems in the background art, in order to improve the defrosting efficiency of an air conditioner, the present invention provides a defrosting control method of an air conditioner, the air conditioner including a bypass defrosting circuit disposed between a compressor and an outdoor unit of the air conditioner for introducing high-pressure gas discharged from the compressor into the outdoor unit to melt frost on a coil of the outdoor unit, the method including the steps of: when the air conditioner enters a bypass defrosting mode, acquiring defrosting operation time T and exhaust temperature T; when T is more than or equal to a first preset time and T is less than or equal to a preset temperature, judging whether the condition of quitting defrosting is met; if not, the air conditioner is switched to a reverse cycle defrosting mode.
In a preferred embodiment of the above defrosting control method of an air conditioner, the first preset time is any time between 5 and 7 minutes; and/or the preset temperature is any temperature between 40 and 50 ℃.
In a preferred embodiment of the above defrosting control method for an air conditioner, the first preset time is 6 minutes; and/or the preset temperature is 45 ℃.
In a preferred embodiment of the above-described air conditioner defrost control method, the method further includes: and when the air conditioner enters a bypass defrosting mode, controlling the outdoor fan to reversely rotate for a first set time, and then controlling the outdoor fan to reversely rotate for the first set time every second set time.
In a preferred embodiment of the above defrosting control method of an air conditioner, the first set time is any time between 15 and 25 seconds; and/or the second set time is any time between 2-4 minutes.
In a preferred embodiment of the above air conditioner defrosting control method, the first set time is 20 seconds; and/or the second set time is 3 minutes.
In a preferred embodiment of the above-described air conditioner defrost control method, the method further includes: and when the air conditioner is switched to the reverse cycle defrosting mode, controlling the outdoor fan to stop rotating.
In a preferred embodiment of the above-described air conditioner defrost control method, the method further includes: detecting the temperature of an external coil of the air conditioner; when the temperature of the external coil is higher than the set temperature, detecting the continuous operation time of the air conditioner in the state; and if the continuous operation time is higher than a second preset time, enabling the air conditioner to exit the defrosting mode.
In a preferred embodiment of the above air conditioner defrosting control method, the second preset time is any time between 15 and 25 seconds.
In a preferred embodiment of the above air conditioner defrosting control method, the second preset time is 20 seconds.
The invention can judge the defrosting efficiency of the air conditioner according to the running time and the exhaust temperature of the air conditioner in the bypass defrosting mode, and once the defrosting efficiency of the air conditioner is poor to a certain extent and the frost layer of the air conditioner is not completely removed, the air conditioner is switched to reverse cycle defrosting so as to improve the defrosting efficiency of the air conditioner. Further, in the bypass defrosting process of the air conditioner, the outdoor fan is controlled to rotate reversely at intervals, namely the outdoor fan is controlled to rotate reversely for a period of time every time when defrosting is carried out, in other words, after frost is melted for a part, the frost layer is blown off quickly by utilizing the reverse blowing action of the outdoor fan, and therefore the defrosting efficiency is further improved. Compared with the traditional defrosting mode, namely the condition that the frost layer is required to be gradually separated from the outdoor unit or completely melted into water, the defrosting method can more quickly finish defrosting operation and effectively reduce the influence of the defrosting process on the indoor temperature.
Drawings
FIG. 1 is a main flow chart of the defrosting control method of the air conditioner of the present invention;
fig. 2 is a flowchart of a defrosting control method of an air conditioner according to an embodiment 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 is mainly directed to an air conditioner with a bypass defrosting loop. As will be understood by those skilled in the art, a bypass defrost circuit of an air conditioner is provided between a compressor and an outdoor unit of the air conditioner for introducing high pressure gas discharged from the compressor into the outdoor unit to melt frost on a coil of the outdoor unit. Specifically, in a state that the bypass circuit is opened, high-pressure gas discharged by the compressor can enter the outdoor unit along the bypass circuit to dissolve frost on the coil of the outdoor unit; when the bypass circuit is closed, high-pressure gas discharged by the compressor sequentially flows through the indoor heat exchanger and the outdoor heat exchanger along the heating circuit to perform heating circulation.
Referring to fig. 1, fig. 1 is a main flowchart of a defrosting control method of an air conditioner according to the present invention. As shown in fig. 1, the method of the present invention comprises the steps of: s110, acquiring defrosting operation time T and exhaust temperature T after the air conditioner enters a bypass defrosting mode; s120, when T is more than or equal to a first preset time and T is less than or equal to a preset temperature, judging whether a condition of quitting defrosting is met; and S130, if not, switching the air conditioner to a reverse cycle defrosting mode. As an example, the first preset time may be 6 minutes, or may be any time between 5-7 minutes; the preset temperature may be 45 deg.c or may be any temperature between 40-50 deg.c.
As will be understood by those skilled in the art, during the bypass defrosting process, since the bypass defrosting circuit has no evaporator, the circulation amount of the refrigerant circulating in the bypass circuit will be less and less, the discharge temperature T of the compressor will be lower and lower with the passage of time, which will cause vicious cycle, the heating capacity will be lower and lower, and the defrosting effect will be lower and lower. Therefore, the defrosting operation time T and the exhaust temperature T are monitored in the bypass defrosting process, when T is more than 6 minutes and T is less than 45 ℃, the defrosting effect is increasingly poor, at the moment, if the condition of quitting defrosting is not met, the defrosting efficiency is increasingly low due to the fact that bypass defrosting is continuously utilized, at the moment, the reverse cycle defrosting needs to be switched to, and the defrosting efficiency of the air conditioner is improved. That is, the present invention can determine the defrosting efficiency of the air conditioner according to the operation time and the discharge temperature of the air conditioner in the bypass defrosting mode, and once the defrosting efficiency of the air conditioner is poor to a certain extent and the frost layer of the air conditioner is not completely removed, the defrosting is switched to the reverse cycle defrosting.
Further, when the air conditioner enters a bypass defrosting mode, the outdoor fan is controlled to rotate reversely for a first set time, and then the outdoor fan is controlled to rotate reversely for the first set time every other second set time; and when the air conditioner is switched to the reverse cycle defrosting mode, controlling the outdoor fan to stop rotating. As an example, the first set time may be 20 seconds, or any time between 15-25 seconds; the second set time is 3 minutes, or any time between 2 and 4 minutes. At present, in the defrosting process of the prior art, an outdoor fan is usually in a stop state, but after an air conditioner enters a bypass defrosting mode, the outdoor fan is controlled to rotate reversely at intervals, namely, the outdoor fan is controlled to rotate reversely for a period of time every time defrosting is carried out, and after frost is melted for a part, a frost layer is blown off quickly by utilizing the reverse blowing action of the outdoor fan, so that the defrosting efficiency is improved. Compared with the traditional defrosting mode, namely the condition that the frost layer is required to be gradually separated from the outdoor unit or completely melted into water, the defrosting method can more quickly finish defrosting operation and effectively reduce the influence of the defrosting process on the indoor temperature.
Referring to fig. 2, fig. 2 is a flowchart of a defrosting control method of an air conditioner according to an embodiment of the present invention. As shown in fig. 2, in this embodiment, the specific steps of the present invention are as follows: s210, detecting the temperature Toil of an external coil of the air conditioner; when Toil is less than the dew point temperature, the operation proceeds to step S220, and the continuous operation time of the air conditioner in the state is detected; if the duration time is higher than the first preset time, for example, the duration time is higher than 40 minutes (the first preset time may also be any time between 35 and 45 minutes), the method proceeds to step S230, and the air conditioner enters the defrost mode. After step S230, the above steps S110-S120 are performed.
The defrosting control method of the air conditioner further comprises the step of exiting the defrosting mode. For example, after the air conditioner enters the defrosting mode, the temperature of the external coil of the air conditioner is detected, when the temperature of the external coil is higher than a set temperature (which can be reasonably set by a person skilled in the art according to the practical application scenario of the air conditioner), the continuous operation time of the air conditioner in this state is detected, when the continuous operation time is higher than a second preset time, for example, the continuous operation time is higher than 20 seconds (or any time between 15 and 25 seconds), it can be judged that the frost layer of the external coil has been removed, and at this time, the air conditioner is exited from the defrosting mode.
In summary, the present invention can determine the defrosting efficiency of the air conditioner according to the operation time and the exhaust temperature of the air conditioner in the bypass defrosting mode, and once the defrosting efficiency of the air conditioner is poor to a certain extent and the frost layer of the air conditioner is not completely removed, the air conditioner is switched to the reverse cycle defrosting to improve the defrosting efficiency of the air conditioner. Further, in the bypass defrosting process of the air conditioner, the outdoor fan is controlled to rotate reversely at intervals, namely the outdoor fan is controlled to rotate reversely for a period of time every time when defrosting is carried out, in other words, after frost is melted for a part, the frost layer is blown off quickly by utilizing the reverse blowing action of the outdoor fan, and therefore the defrosting efficiency is further improved. Compared with the traditional defrosting mode, namely the condition that the frost layer is required to be gradually separated from the outdoor unit or completely melted into water, the defrosting method can more quickly finish defrosting operation and effectively reduce the influence of the defrosting process on the indoor temperature.
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 (10)
1. A defrosting control method of an air conditioner includes a bypass defrosting circuit provided between a compressor and an outdoor unit of the air conditioner for introducing high pressure gas discharged from the compressor into the outdoor unit to melt a frost layer on a coil of the outdoor unit,
characterized in that the method comprises the following steps:
when the air conditioner enters a bypass defrosting mode, acquiring defrosting operation time T and exhaust temperature T;
when T is more than or equal to a first preset time and T is less than or equal to a preset temperature, judging whether the condition of quitting defrosting is met;
if not, the air conditioner is switched to a reverse cycle defrosting mode.
2. The air conditioner defrost control method of claim 1, wherein the first preset time is any time between 5-7 minutes; and/or
The preset temperature is any temperature between 40 and 50 ℃.
3. The air conditioner defrost control method of claim 2, wherein the first preset time is 6 minutes; and/or
The preset temperature is 45 ℃.
4. The air conditioner defrost control method of claim 3, further comprising:
and when the air conditioner enters a bypass defrosting mode, controlling the outdoor fan to reversely rotate for a first set time, and then controlling the outdoor fan to reversely rotate for the first set time every second set time.
5. The air conditioner defrost control method of claim 4, wherein the first set time is any time between 15-25 seconds; and/or
The second set time is any time between 2 and 4 minutes.
6. The air conditioner defrost control method of claim 5, wherein the first set time is 20 seconds; and/or
The second set time is 3 minutes.
7. The air conditioner defrost control method of claim 6, further comprising:
and when the air conditioner is switched to the reverse cycle defrosting mode, controlling the outdoor fan to stop rotating.
8. The air conditioner defrost control method of any one of claims 1-7, further comprising:
detecting the temperature of an external coil of the air conditioner;
when the temperature of the external coil is higher than the set temperature, detecting the continuous operation time of the air conditioner in the state;
and if the continuous operation time is higher than a second preset time, enabling the air conditioner to exit the defrosting mode.
9. The air conditioner defrost control method of claim 8, wherein the second preset time is any time between 15-25 seconds.
10. The air conditioner defrost control method of claim 9, wherein the second preset time is 20 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810941886.8A CN110836504B (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for air conditioner |
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| CN201810941886.8A CN110836504B (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for air conditioner |
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| CN110836504A true CN110836504A (en) | 2020-02-25 |
| CN110836504B CN110836504B (en) | 2022-03-29 |
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Cited By (4)
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| CN112460847A (en) * | 2020-11-24 | 2021-03-09 | 无锡同方人工环境有限公司 | Air source heat pump unit with fluorine pump defrosting function and defrosting method thereof |
| CN112728721A (en) * | 2020-12-23 | 2021-04-30 | 珠海格力电器股份有限公司 | Air conditioner, composite defrosting control method and device thereof, and storage medium |
| CN112781179A (en) * | 2020-12-24 | 2021-05-11 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and system and air conditioner |
| CN114811849A (en) * | 2022-04-20 | 2022-07-29 | 北京小米移动软件有限公司 | Air conditioner defrosting control method, air conditioner defrosting control device and storage medium |
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| CN112728721A (en) * | 2020-12-23 | 2021-04-30 | 珠海格力电器股份有限公司 | Air conditioner, composite defrosting control method and device thereof, and storage medium |
| CN112781179A (en) * | 2020-12-24 | 2021-05-11 | 珠海格力电器股份有限公司 | Air conditioner defrosting control method and system and air conditioner |
| CN114811849A (en) * | 2022-04-20 | 2022-07-29 | 北京小米移动软件有限公司 | Air conditioner defrosting control method, air conditioner defrosting control device and storage medium |
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| CN110836504B (en) | 2022-03-29 |
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Effective date of registration: 20220124 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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