CN110836450A - Defrosting control method for air conditioner - Google Patents
Defrosting control method for air conditioner Download PDFInfo
- Publication number
- CN110836450A CN110836450A CN201810939868.6A CN201810939868A CN110836450A CN 110836450 A CN110836450 A CN 110836450A CN 201810939868 A CN201810939868 A CN 201810939868A CN 110836450 A CN110836450 A CN 110836450A
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- Prior art keywords
- air conditioner
- defrosting
- temperature
- control method
- defrost
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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
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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
- F24F11/62—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (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 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 circuit, wherein the bypass defrosting circuit is arranged between a compressor and an outdoor unit of the air conditioner and is used for introducing high-pressure gas discharged by the compressor into the outdoor unit so as to melt frost layers on a coil of the outdoor unit, and the method comprises the following steps: when the air conditioner needs to enter a defrosting mode, a bypass defrosting loop is started and the outdoor fan is controlled to continuously rotate reversely. In the technical scheme of the invention, due to the back blowing effect of the outdoor fan, the frost layer of the outdoor unit in the defrosting process is blown off more easily and more quickly, so that the defrosting efficiency is improved.
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 needs to enter a defrosting mode, a bypass defrosting loop is started and the outdoor fan is controlled to continuously rotate reversely.
In a preferred embodiment of the above-mentioned defrosting control method for an air conditioner, before the step of "when the air conditioner needs to enter the defrosting mode, turning on the bypass defrosting circuit and controlling the outdoor fan to continuously reverse" the method further comprises: detecting the temperature of an external coil of the air conditioner; and judging whether the air conditioner enters a defrosting mode or not according to the temperature of the outer coil.
In a preferred embodiment of the above-described air conditioner defrosting control method, the step of determining whether to enter the air conditioner into the defrosting mode based on the temperature of the external coil includes: comparing the outer coil temperature to a dew point temperature; and if the value obtained by subtracting the dew point temperature from the temperature of the external coil is less than or equal to a first set value, enabling the air conditioner to enter a defrosting mode.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, the first set value is an arbitrary value within a range of [ -6, -4 ].
In a preferred embodiment of the above-mentioned defrosting control method of an air conditioner, the first set value is-5.
In a preferred embodiment of the above-mentioned defrosting control method of an air conditioner, after the step of "when the air conditioner needs to enter the defrosting mode, turning on the bypass defrosting circuit and controlling the outdoor fan to continuously reverse" the method further comprises: detecting the temperature of an external coil of the air conditioner; comparing the outer coil temperature to a dew point temperature; and if the value obtained by subtracting the dew point temperature from the temperature of the external coil is greater than a second set value, enabling the air conditioner to exit the defrosting mode.
In a preferred embodiment of the above-described defrosting control method of an air conditioner, the second set value is an arbitrary value within a range of [ -4, -2 ].
In a preferred embodiment of the above-mentioned defrosting control method of an air conditioner, the second set value is-3.
In a preferred embodiment of the above-mentioned defrosting control method of an air conditioner, after the step of "when the air conditioner needs to enter the defrosting mode, turning on the bypass defrosting circuit and controlling the outdoor fan to continuously reverse" the method further comprises: 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 the preset time, enabling the air conditioner to exit the defrosting mode.
In a preferred embodiment of the above defrosting control method of an air conditioner, the preset time is any time between 15 and 25 seconds; or the preset time is 20 seconds.
The defrosting control method of the air conditioner mainly comprises the steps of starting a bypass defrosting loop and controlling an outdoor fan to continuously rotate reversely after the air conditioner needs to enter a defrosting mode until defrosting is finished. Due to the back blowing effect of the outdoor fan, a frost layer of the outdoor unit is blown off more easily and more quickly in the defrosting process, 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.
Drawings
Fig. 1 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.
The defrosting control method of the air conditioner comprises the following steps: when the air conditioner needs to enter a defrosting mode, a bypass defrosting loop is started and the outdoor fan is controlled to continuously rotate reversely. In the defrosting process of the prior art, the outdoor fan is usually in a stop state, and the outdoor fan is controlled to continuously rotate reversely on the premise of adopting bypass defrosting. Therefore, in the defrosting process, the frost layer of the outdoor unit in the defrosting process is blown off more easily and more quickly due to the back blowing effect of the outdoor fan, and 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. 1, fig. 1 is a flowchart of a defrosting control method of an air conditioner according to an embodiment of the present invention. As shown in fig. 1, in this embodiment, the specific steps of the present invention are as follows: s110, detecting the temperature Toil of an external coil of the air conditioner; s120, comparing the temperature Toil of the outer coil with the dew point temperature Te, if the Toil-Te is less than or equal to a first set value, enabling the air conditioner to enter a defrosting mode, and executing the step S130, starting a bypass defrosting loop and controlling an outdoor fan to continuously rotate reversely; otherwise, the step S110 is executed. The first setting value can be set reasonably by those skilled in the art according to the specific use scenario of the air conditioner, for example, the first setting value can be-5, or the first setting value can be any value within the range of [ -6, -4 ].
In this embodiment, the dew point temperature refers to the temperature at which the air is cooled to saturation without changing both the moisture content and the air pressure. That is, when the temperature of the outer coil is lower than the dew point temperature to a certain degree, for example, the temperature of the outer coil is lower than the dew point temperature by more than-5 ℃, it indicates that the outer coil meets the condition of frosting, that is, the outer coil is easily frosted. Therefore, the embodiment judges whether the air conditioner needs to enter the defrosting mode by comparing the temperature of the external coil with the dew point temperature, so that the defrosting time of the air conditioner is more accurate.
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 Toil of the external coil of the air conditioner is detected, then the temperature Toil of the external coil is compared with the dew point temperature Te, and if the Toil-Te is larger than a second set value, the air conditioner is exited from the defrosting mode. The second setting value can be set reasonably by those skilled in the art according to the specific use scenario of the air conditioner, for example, the second setting value can be set to-3, or the second setting value can also be any value within the interval [ -4, -2 ]. It will be understood by those skilled in the art that the temperature of the outer coil will gradually increase as the frost layer decreases, and that when the temperature of the outer coil increases to a certain extent, for example, a temperature less than the dew point temperature, indicating that the frost on the outer coil has been substantially removed, the air conditioner may be caused to promote defrosting.
As another example, the step of exiting the defrost mode of the present invention may further be: 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 (the set temperature can be reasonably set by a person skilled in the art according to the practical application scene of the air conditioner), the continuous operation time of the air conditioner in the 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), the defrosting mode of the air conditioner is judged to be removed, and at the moment, the air conditioner is made to exit the defrosting mode.
In summary, the defrosting control method for the air conditioner of the present invention is mainly to open the bypass defrosting loop and control the outdoor fan to continuously reverse after the air conditioner needs to enter the defrosting mode until the defrosting is completed. Due to the back blowing effect of the outdoor fan, a frost layer of the outdoor unit is blown off more easily and more quickly in the defrosting process, 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.
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 needs to enter a defrosting mode, a bypass defrosting loop is started and the outdoor fan is controlled to continuously rotate reversely.
2. The air conditioner defrost control method of claim 1, wherein before the step of turning on the bypass defrost circuit and controlling the outdoor fan to continuously reverse when the air conditioner needs to enter the defrost mode, the method further comprises:
detecting the temperature of an external coil of the air conditioner;
and judging whether the air conditioner enters a defrosting mode or not according to the temperature of the outer coil.
3. The air conditioner defrosting control method according to claim 2, wherein the step of determining whether to enter the air conditioner into the defrosting mode according to the temperature of the external coil includes:
comparing the outer coil temperature to a dew point temperature;
and if the value obtained by subtracting the dew point temperature from the temperature of the external coil is less than or equal to a first set value, enabling the air conditioner to enter a defrosting mode.
4. The defrosting control method of an air conditioner according to claim 3, wherein the first set value is an arbitrary value within a range of [ -6, -4 ].
5. The air conditioner defrost control method of claim 4, wherein the first set value is-5.
6. The air conditioner defrost control method of any one of claims 1-5, wherein after the step of turning on a bypass defrost circuit and controlling the outdoor fan to continuously reverse when the air conditioner needs to enter a defrost mode, the method further comprises:
detecting the temperature of an external coil of the air conditioner;
comparing the outer coil temperature to a dew point temperature;
and if the value obtained by subtracting the dew point temperature from the temperature of the external coil is greater than a second set value, enabling the air conditioner to exit the defrosting mode.
7. The defrosting control method of an air conditioner according to claim 6, wherein the second set value is an arbitrary value within a range of [ -4, -2 ].
8. The air conditioner defrost control method of claim 7, wherein the second set value is-3.
9. The air conditioner defrost control method of any one of claims 1-5, wherein after the step of turning on a bypass defrost circuit and controlling the outdoor fan to continuously reverse when the air conditioner needs to enter a defrost mode, the method further comprises:
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 the preset time, enabling the air conditioner to exit the defrosting mode.
10. The air conditioner defrost control method of claim 9, wherein the preset time is any time between 15-25 seconds; or the preset time is 20 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810939868.6A CN110836450A (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810939868.6A CN110836450A (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for air conditioner |
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| CN110836450A true CN110836450A (en) | 2020-02-25 |
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| CN201810939868.6A Pending CN110836450A (en) | 2018-08-17 | 2018-08-17 | Defrosting control method for air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223531A1 (en) * | 2020-05-14 | 2021-11-11 | 青岛海尔空调电子有限公司 | Air conditioner and control method therefor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2670854Y (en) * | 2003-11-11 | 2005-01-12 | 王德元 | Frostless high-efficient air-cooled heat pump set |
| JP2012207803A (en) * | 2011-03-29 | 2012-10-25 | Fujitsu General Ltd | Control method of air conditioner |
| CN104132404A (en) * | 2014-07-31 | 2014-11-05 | 青岛海尔空调器有限总公司 | Air-conditioner defrosting method |
| CN104819610A (en) * | 2015-04-30 | 2015-08-05 | 广东美的制冷设备有限公司 | Air conditioner defrosting control device and method |
| CN104833060A (en) * | 2015-05-22 | 2015-08-12 | 广东美的暖通设备有限公司 | Defrosting control method and device for air conditioner |
| CN107655150A (en) * | 2017-10-16 | 2018-02-02 | 广东美的暖通设备有限公司 | Air-conditioner defrosting control device and method |
-
2018
- 2018-08-17 CN CN201810939868.6A patent/CN110836450A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2670854Y (en) * | 2003-11-11 | 2005-01-12 | 王德元 | Frostless high-efficient air-cooled heat pump set |
| JP2012207803A (en) * | 2011-03-29 | 2012-10-25 | Fujitsu General Ltd | Control method of air conditioner |
| CN104132404A (en) * | 2014-07-31 | 2014-11-05 | 青岛海尔空调器有限总公司 | Air-conditioner defrosting method |
| CN104819610A (en) * | 2015-04-30 | 2015-08-05 | 广东美的制冷设备有限公司 | Air conditioner defrosting control device and method |
| CN104833060A (en) * | 2015-05-22 | 2015-08-12 | 广东美的暖通设备有限公司 | Defrosting control method and device for air conditioner |
| CN107655150A (en) * | 2017-10-16 | 2018-02-02 | 广东美的暖通设备有限公司 | Air-conditioner defrosting control device and method |
Non-Patent Citations (1)
| Title |
|---|
| 石文星，王宝龙，邵双全: "《小型空调热泵装置设计》", 31 October 2013, 中国建筑工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223531A1 (en) * | 2020-05-14 | 2021-11-11 | 青岛海尔空调电子有限公司 | Air conditioner and control method therefor |
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