CN109916036B - Self-cleaning control method for air conditioner - Google Patents
Self-cleaning control method for air conditioner Download PDFInfo
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- CN109916036B CN109916036B CN201910218958.0A CN201910218958A CN109916036B CN 109916036 B CN109916036 B CN 109916036B CN 201910218958 A CN201910218958 A CN 201910218958A CN 109916036 B CN109916036 B CN 109916036B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000428 dust Substances 0.000 claims abstract description 71
- 239000010865 sewage Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 230000000694 effects Effects 0.000 abstract description 8
- 241000894006 Bacteria Species 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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Abstract
The invention belongs to the technical field of air conditioners, and particularly provides a self-cleaning control method of an air conditioner. In order to improve the self-cleaning effect of the air conditioner, the air conditioner comprises an indoor unit and a dust collector arranged on the indoor unit, wherein the dust collector can move relative to a heat exchanger of the indoor unit and can absorb dust on the heat exchanger in the moving process. The self-cleaning control method based on the air conditioner comprises the following steps: acquiring a heat exchanger image of an indoor unit under the condition that an air conditioner needs to perform dust collection and cleaning; processing the image of the heat exchanger to obtain the sewage turbidity of different areas on the heat exchanger; and controlling the working state of the dust collector according to the dirt degrees of different areas on the heat exchanger. Because the dirt degrees of different areas on the heat exchanger are different and the working strength of the dust collector is required to be different, the invention can effectively improve the self-cleaning effect of the air conditioner by independently processing the dirt in different areas on the heat exchanger.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides a self-cleaning control method of an air conditioner.
Background
The air conditioner is the equipment that can refrigerate for the room/heat, and along with the time lapse, the deposition on the air conditioner indoor set can increase gradually, can breed a large amount of bacteriums after the deposition accumulates to a certain extent, especially when indoor air flows through the indoor set, can carry a large amount of dust and bacterium, consequently needs in time to clean the air conditioner. At present, the air conditioner mostly adopts a self-cleaning mode, namely, the operation of an indoor unit is controlled, so that an evaporator is firstly frosted and then defrosted, and the evaporator is cleaned by using the defrosted air. Sometimes, the indoor heat exchanger cannot be completely cleaned up only by self-cleaning in a way of first frosting and then defrosting, and particularly is difficult to be carried away by the defrosting water when a large dirty spider web exists.
Therefore, the present invention provides a self-cleaning control method for an air conditioner to solve the above problems.
Disclosure of Invention
In order to solve the problems in the prior art, namely to improve the self-cleaning effect of the air conditioner, the invention provides a self-cleaning control method of the air conditioner, wherein the air conditioner comprises an indoor unit and a dust collector arranged on the indoor unit, and the dust collector can move relative to a heat exchanger of the indoor unit and can absorb dust on the heat exchanger in the moving process; the self-cleaning control method of the air conditioner comprises the following steps: s110, acquiring a heat exchanger image of the indoor unit under the condition that the air conditioner needs to perform dust collection and cleaning; s120, processing the image of the heat exchanger to obtain the sewage turbidity of different areas on the heat exchanger; and S130, controlling the working state of the dust collector according to the dirt degrees of different areas on the heat exchanger.
In a preferred embodiment of the above-mentioned self-cleaning control method of the air conditioner, step S130 specifically includes: when the dirt degree of the corresponding area on the heat exchanger is larger than or equal to a preset standard value and smaller than a first preset value, the dust collector is controlled to move at a first speed relative to the area, and dust on the area of the heat exchanger is absorbed by first wind power.
In a preferred embodiment of the above-mentioned self-cleaning control method of the air conditioner, step S130 specifically includes: when the dirt degree of a corresponding area on the heat exchanger is larger than or equal to a first preset value and smaller than a second preset value, controlling the dust collector to move at a second speed relative to the area and absorbing dust on the area of the heat exchanger by second wind power; wherein the second speed is less than the first speed, and the second wind force is greater than the first wind force.
In a preferred embodiment of the above-mentioned self-cleaning control method of the air conditioner, step S120 specifically includes: when the dirt degree of a corresponding area on the heat exchanger is larger than or equal to a second preset value, controlling the dust collector to stop moving relative to the area and absorbing dust on the area of the heat exchanger by third wind power; wherein the third wind > the second wind.
In a preferred embodiment of the above air conditioner self-cleaning control method, step S120 further includes: under the condition that the dirt degree of a corresponding area on the heat exchanger is larger than or equal to a second preset value, if the dirt degree of the area is smaller than a third preset value, stopping the dust collector for a first preset time relative to the area; if the dirt degree of the area is larger than or equal to a third preset value, stopping the dust collector for a second preset time relative to the area; wherein the second preset time is greater than the first preset time.
In a preferred embodiment of the above air conditioner self-cleaning control method, a cover plate is disposed at an air inlet of the indoor unit, and the cover plate can open or close the air inlet of the indoor unit; the self-cleaning control method of the air conditioner further comprises the following steps: and before the heat exchanger of the indoor unit is subjected to dust collection, controlling the cover plate to close the air inlet.
In a preferred embodiment of the above self-cleaning control method for the air conditioner, the air conditioner further includes a water storage chamber and a humidification module, which are disposed in the indoor unit, and water in the water storage chamber can be atomized into water vapor under the action of the humidification module and diffused to the heat exchanger; the self-cleaning control method of the air conditioner further comprises the following steps: and starting the humidifying module after the air conditioner finishes dust suction and cleaning.
In a preferred embodiment of the above air conditioner self-cleaning control method, the air conditioner self-cleaning control method further comprises: before the humidifying module is started, acquiring water quality information in the water storage cavity; and judging whether to start the humidifying module according to the water quality information.
In an embodiment of the above air conditioner self-cleaning control method, the step of determining whether to start the humidification module according to the water quality information includes: and when the water quality information meets a preset water quality standard, starting the humidifying module.
In an embodiment of the above air conditioner self-cleaning control method, the step of determining whether to start the humidification module according to the water quality information further includes: when the water quality information does not meet the preset water quality standard, the humidifying module is not started and reminding information is sent out; the reminding information is used for reminding a user to replace the water in the water storage cavity.
Because the dirt degree of different regions on the heat exchanger is different, the working strength of the dust collector can be represented by speed and wind power, the larger the dirt degree of the heat exchanger is, the lower the moving speed of the dust collector is, and the larger the wind power is, so that the strong and durable dust collection can be intensively carried out on the region with the large dirt degree on the heat exchanger, and the optimal dust collection effect is achieved. Therefore, the invention can effectively improve the self-cleaning effect of the air conditioner by independently treating the pollutants in different areas on the heat exchanger.
Drawings
Fig. 1 is a main flowchart of a self-cleaning control method of an air conditioner 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 described clearly and completely with reference to the accompanying drawings, and it is apparent that the described 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 air conditioner comprises an indoor unit and a dust collector arranged on the indoor unit, wherein the dust collector can move relative to a heat exchanger of the indoor unit and can absorb dust on the heat exchanger in the moving process.
Referring to fig. 1, fig. 1 is a main flowchart of a self-cleaning control method of an air conditioner of the present invention. As shown in fig. 1, the self-cleaning control method of the air conditioner of the present invention includes the following steps: s110, acquiring a heat exchanger image of the indoor unit under the condition that the air conditioner needs to be cleaned by dust collection; s120, processing the image of the heat exchanger to obtain the sewage turbidity of different areas on the heat exchanger; and S130, controlling the working state of the dust collector according to the dirt degrees of different areas on the heat exchanger. As can be understood by those skilled in the art, the dirt degrees of different areas on the heat exchanger are different, and the working strength of the dust collector is required to be different, so that the self-cleaning effect of the air conditioner can be effectively improved by the method for separately treating the dirt in different areas on the heat exchanger.
Specifically, in step S120, the heat exchanger image may be processed by the image recognition module. It should be noted that, the image recognition module may be any existing chip for image processing, as long as the purpose of analyzing and processing the image to obtain the turbidity is achieved. For example, the acquired image of the heat exchanger may be compared with a clean image of the heat exchanger (i.e., the image is not covered with dirt such as dust), so as to obtain the dust amount in different areas on the current image of the heat exchanger, and then the dirt turbidity of the dust amount may be calculated according to a set algorithm. The person skilled in the art may also use any other reasonable algorithm to calculate the turbidity at the heat exchanger and will not be described in detail here.
In step S130, when the dirt degree of the corresponding area on the heat exchanger is greater than or equal to a preset standard value and less than a first preset value, the vacuum cleaner is controlled to move at a first speed relative to the area and absorb dust on the area of the heat exchanger by first wind power. And when the dirt degree of the corresponding area on the heat exchanger is greater than or equal to a first preset value and smaller than a second preset value, controlling the dust collector to move at a second speed relative to the area and absorb dust on the area of the heat exchanger by second wind power, wherein the second speed is less than the first speed, and the second wind power is greater than the first wind power. And when the turbidity degree of the corresponding area on the heat exchanger is greater than or equal to a second preset value, controlling the dust collector to stop moving relative to the area and absorbing dust on the area of the heat exchanger by third wind power, wherein the third wind power is greater than the second wind power. Further, under the condition that the dirt degree of the corresponding area on the heat exchanger is larger than or equal to a second preset value, if the dirt degree of the area is smaller than a third preset value, the dust collector is stopped for a first preset time relative to the area; and if the dirt degree of the area is larger than or equal to a third preset value, stopping the dust collector relative to the area for a second preset time, wherein the second preset time is larger than the first preset time.
The preset standard values mentioned above can be understood as: and the dust collector is started only when the dirt of the heat exchanger is higher than a preset standard value. Therefore, the preset standard value can be set by those skilled in the art according to actual needs. The first preset value and the second preset value can be understood as dividing the dirt turbidity on the heat exchanger into different intervals according to different degrees, namely, the dirt turbidity is below a preset standard value, between the preset standard value and the first preset value, between the first preset value and the second preset value and above the second preset value, and the dirt turbidity represents that the working strength of the dust collector is required to be different in different intervals. The working strength of the dust collector can be represented by speed and wind power, the larger the dirt degree of the heat exchanger is, the lower the moving speed of the dust collector is required to be and the larger the wind power is, and therefore powerful and durable dust collection can be intensively carried out on the area with the large dirt degree on the heat exchanger, and the best dust collection effect is achieved. Based on this, the first preset value and the second preset value can be flexibly set by a person skilled in the art, and meanwhile, the first speed, the second speed, the first wind power, the second wind power and the third wind power can also be set by the person skilled in the art, and only the dust collection principle needs to be satisfied (the larger the dirt degree of the heat exchanger is, the lower the moving speed of the dust collector needs to be, and the larger the wind power is).
In a specific embodiment, the air inlet of the indoor unit is further provided with a cover plate, and the cover plate can open or close the air inlet of the indoor unit. The self-cleaning control method of the air conditioner of the invention also comprises the following steps: before the heat exchanger of the indoor unit is subjected to dust collection, the cover plate is controlled to close the air inlet. The dust collector can collect dust in a closed environment, and dust collection efficiency is improved.
In a more specific embodiment, the air conditioner further comprises a water storage cavity and a humidifying module which are arranged in the indoor unit, and water in the water storage cavity can be atomized into water vapor under the action of the humidifying module and diffused to the heat exchanger. The self-cleaning control method of the air conditioner of the invention also comprises the following steps: after the air conditioner finishes dust absorption and cleaning, the humidifying module is started to ensure that clean water vapor diffuses on the heat exchanger of the indoor unit, so that the cleanliness of the heat exchanger is improved.
Preferably, before the humidifying module is started, water quality information in the water storage cavity is acquired; and judging whether to start the humidifying module according to the water quality information. Specifically, when the water quality information meets a preset water quality standard, a humidifying module is started; and when the water quality information does not meet the preset water quality standard, the humidifying module is not started and reminding information is sent. Wherein, the reminding information is used for reminding the user to replace the water in the water storage cavity. If the indoor air is humidified by poor water quality, the indoor air can be polluted, the surface of the heat exchanger is covered with dust, and the better cleaning effect can be achieved only by using clean water. Therefore, only when the water quality information meets the preset water quality standard, the humidification module is favorable for humidifying the indoor air, so that the situation of polluting the indoor air is prevented.
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 (5)
1. A self-cleaning control method of an air conditioner is characterized in that the air conditioner comprises an indoor unit and a dust collector arranged on the indoor unit, wherein the dust collector can move relative to a heat exchanger of the indoor unit and can absorb dust on the heat exchanger in the moving process; a cover plate is arranged at the air inlet of the indoor unit, and the cover plate can open or close the air inlet of the indoor unit;
the self-cleaning control method of the air conditioner comprises the following steps:
before dust is sucked on a heat exchanger of the indoor unit, the cover plate is controlled to close the air inlet;
s110, acquiring a heat exchanger image of the indoor unit under the condition that the air conditioner needs to perform dust collection and cleaning;
s120, processing the image of the heat exchanger to obtain the sewage turbidity of different areas on the heat exchanger;
s130, controlling the working state of the dust collector according to the dirt degrees of different areas on the heat exchanger;
wherein, step S130 specifically includes:
when the dirt degree of a corresponding area on the heat exchanger is larger than or equal to a preset standard value and smaller than a first preset value, controlling the dust collector to move at a first speed relative to the area and absorbing dust on the area of the heat exchanger by first wind power;
when the dirt degree of a corresponding area on the heat exchanger is larger than or equal to a first preset value and smaller than a second preset value, controlling the dust collector to move at a second speed relative to the area and absorbing dust on the area of the heat exchanger by second wind power;
when the dirt degree of a corresponding area on the heat exchanger is larger than or equal to a second preset value, controlling the dust collector to stop moving relative to the area and absorbing dust on the area of the heat exchanger by third wind power;
under the condition that the dirt degree of a corresponding area on the heat exchanger is larger than or equal to a second preset value, if the dirt degree of the area is smaller than a third preset value, stopping the dust collector for a first preset time relative to the area; if the dirt degree of the area is larger than or equal to a third preset value, stopping the dust collector for a second preset time relative to the area;
the second speed is less than the first speed, the second wind power is greater than the first wind power, the third wind power is greater than the second wind power, and the second preset time is greater than the first preset time.
2. The self-cleaning control method of the air conditioner as claimed in claim 1, wherein the air conditioner further comprises a water storage chamber and a humidifying module arranged in the indoor unit, and water in the water storage chamber can be atomized into water vapor under the action of the humidifying module and diffused to the heat exchanger;
the self-cleaning control method of the air conditioner further comprises the following steps:
and starting the humidifying module after the air conditioner finishes dust suction and cleaning.
3. An air conditioner self-cleaning control method according to claim 2, further comprising:
before the humidifying module is started, acquiring water quality information in the water storage cavity;
and judging whether to start the humidifying module according to the water quality information.
4. The self-cleaning control method of the air conditioner as claimed in claim 3, wherein the step of determining whether to start the humidifying module according to the water quality information includes:
and when the water quality information meets a preset water quality standard, starting the humidifying module.
5. The self-cleaning control method of the air conditioner as claimed in claim 3, wherein the step of determining whether to start the humidifying module according to the water quality information further comprises:
when the water quality information does not meet the preset water quality standard, the humidifying module is not started and reminding information is sent out;
the reminding information is used for reminding a user to replace the water in the water storage cavity.
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| CN111023415A (en) * | 2019-12-24 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Self-cleaning control method and device and multi-split air conditioner |
| CN114234418B (en) * | 2021-11-17 | 2023-08-29 | 广州大学 | Mould self-cleaning device, mould self-cleaning method and air conditioning system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103299136A (en) * | 2011-01-11 | 2013-09-11 | 夏普株式会社 | Filter holding device, filter cleaning device, and air conditioner |
| JP2014035178A (en) * | 2012-08-10 | 2014-02-24 | Mitsubishi Electric Corp | Indoor unit of air conditioner |
| CN109323412A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | The control method of air conditioner indoor unit |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005140406A (en) * | 2003-11-06 | 2005-06-02 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JP4402094B2 (en) * | 2006-11-06 | 2010-01-20 | 日立アプライアンス株式会社 | Air conditioner |
| CN101270902B (en) * | 2007-03-22 | 2010-06-30 | 海尔集团公司 | Self-cleaning device of air conditioner dirt filtrating screen |
| JP5751231B2 (en) * | 2012-09-28 | 2015-07-22 | ダイキン工業株式会社 | Air conditioning indoor unit |
| CN103216891B (en) * | 2013-04-22 | 2016-05-11 | 四川长虹电器股份有限公司 | Air-conditioner outdoor unit dust pelletizing system and method |
| CN103234261B (en) * | 2013-05-02 | 2015-09-30 | 四川长虹电器股份有限公司 | The method and system of air conditioner dedusting |
| JP6667232B2 (en) * | 2015-08-31 | 2020-03-18 | シャープ株式会社 | Air conditioner |
| CN205655430U (en) * | 2016-05-16 | 2016-10-19 | 何鹏程 | Multipurpose humidifier |
| CN105945008B (en) * | 2016-06-07 | 2018-12-18 | 珠海格力电器股份有限公司 | Cleaning device for air conditioner, air conditioner and cleaning method of air conditioner |
| JP6290492B1 (en) * | 2017-04-28 | 2018-03-07 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
| CN107514682A (en) * | 2017-07-26 | 2017-12-26 | 青岛海尔空调器有限总公司 | Air conditioner room unit with self-cleaning function |
| CN107514681A (en) * | 2017-07-26 | 2017-12-26 | 青岛海尔空调器有限总公司 | Air conditioner room unit |
| CN109237638B (en) * | 2018-08-20 | 2019-12-17 | 珠海格力电器股份有限公司 | Outdoor unit capable of removing filth blockage of heat exchanger and control method |
-
2019
- 2019-03-21 CN CN201910218958.0A patent/CN109916036B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103299136A (en) * | 2011-01-11 | 2013-09-11 | 夏普株式会社 | Filter holding device, filter cleaning device, and air conditioner |
| JP2014035178A (en) * | 2012-08-10 | 2014-02-24 | Mitsubishi Electric Corp | Indoor unit of air conditioner |
| CN109323412A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | The control method of air conditioner indoor unit |
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