CN-116481136-B - Self-cleaning control method of air conditioner indoor unit and air conditioner

CN116481136BCN 116481136 BCN116481136 BCN 116481136BCN-116481136-B

Abstract

The invention belongs to the technical field of air conditioners, and particularly provides a self-cleaning control method of an air conditioner indoor unit and an air conditioner. The heat exchanger of the indoor unit of the air conditioner is provided with a photocatalyst coating, and a light source for activating the photocatalyst is arranged in the indoor unit of the air conditioner. The self-cleaning control method comprises a frosting step, a photocatalyst activating step and a frosting cleaning step, wherein the frosting step controls the air conditioner indoor unit to enter a refrigerating mode, and operates for a first time period when the heat exchanger is below a first preset temperature so as to frost the surface of the heat exchanger, the photocatalyst activating step controls the light source to be electrified so as to activate the photocatalyst, and the frosting cleaning step controls the air conditioner indoor unit to enter a heating mode so as to defrost the heat exchanger. The invention effectively improves the safety of water generated in the self-cleaning process of the air conditioner indoor unit, so that the water generated in the self-cleaning process of the air conditioner indoor unit can be reused.

Inventors

CHEN QIANG
WANG JIANING
ZHANG FENGFEI
LI HUAGANG
DONG JINSHENG
XU QINYAO
DENG CHUANG
GAO BAOHUA
WANG JINWEI
ZHONG YINGJIE
HU HAIBO

Assignees

青岛海尔空调器有限总公司
青岛海尔空调电子有限公司
青岛海尔智能技术研发有限公司
海尔智家股份有限公司

Dates

Publication Date: 20260512
Application Date: 20230427

Claims (10)

1. A self-cleaning control method of an air conditioner indoor unit, wherein a heat exchanger of the air conditioner indoor unit is provided with a photocatalyst coating, and a light source for activating a photocatalyst is arranged in the air conditioner indoor unit, and the self-cleaning control method comprises the following steps: controlling the indoor unit of the air conditioner to enter a refrigeration mode, and operating for a first duration when the heat exchanger is below a first preset temperature so as to frost the surface of the heat exchanger; Activating a photocatalyst, namely controlling the light source to be electrified so as to activate the photocatalyst; and defrosting and cleaning, namely controlling the indoor unit of the air conditioner to enter a heating mode so as to defrost the heat exchanger.
2. The self-cleaning control method of an air conditioner indoor unit according to claim 1, wherein, Between the frosting step and the activating photocatalyst step, the self-cleaning control method further includes: A defrosting and water-making step, wherein the air conditioner indoor unit is controlled to operate for a second time period when the heat exchanger is above a second preset temperature, so that the heat exchanger fuses the frost on the air conditioner indoor unit into water; And an icing step, wherein the air conditioner indoor unit is controlled to operate for a third time period when the heat exchanger is below a third preset temperature so that the heat exchanger freezes water on the surface of the heat exchanger into ice, and the third preset temperature is smaller than or equal to the first preset temperature.
3. The self-cleaning control method of an air conditioner indoor unit according to claim 2, wherein, The defrosting and water producing step comprises the following steps: And controlling the air conditioner indoor unit to enter a heating mode, and controlling the air conditioner indoor unit to operate for a second time period when the heat exchanger is above a second preset temperature so as to enable the heat exchanger to fuse frost on the heat exchanger into water.
4. The self-cleaning control method of an air conditioner indoor unit according to claim 2, wherein, The defrosting and water producing step comprises the following steps: Reducing the refrigerating power of the indoor unit of the air conditioner, and/or, And the rotating speed of the fan of the air conditioner indoor unit is increased.
5. The self-cleaning control method of an air conditioner indoor unit according to claim 2, wherein, The defrosting and water producing step comprises the following steps: And controlling the air conditioner indoor unit to stop refrigerating, and continuing the second time period when the heat exchanger is above the second preset temperature.
6. The self-cleaning control method of an air conditioner indoor unit according to claim 2, wherein, Between the icing step and the defrosting cleaning step, the self-cleaning control method further comprises: An deicing and sterilizing step, wherein the air conditioner indoor unit is controlled to operate for a fourth time period when the heat exchanger is above a fourth preset temperature, so that the heat exchanger can melt ice on the heat exchanger into water, and a motion environment is provided for substances with strong oxidability generated by a photocatalyst so as to sterilize; And controlling the air conditioner indoor unit to operate for a fifth time period when the heat exchanger is below a fifth preset temperature, so that the surface of the heat exchanger is fully frosted.
7. An air conditioner, comprising: An air conditioner outdoor unit, wherein, The heat exchanger of the indoor unit of the air conditioner is provided with a photocatalyst coating, and a light source for activating the photocatalyst is also arranged in the indoor unit of the air conditioner; A controller configured to be able to control the air conditioner to perform the self-cleaning control method according to any one of claims 1 to 6.
8. The air conditioner of claim 7, wherein, The air conditioner indoor unit further comprises a sprayer, wherein the sprayer comprises a water box, a nozzle and a water pump, and the water pump is used for conveying water in the water box to the nozzle so as to enable the nozzle to spray water mist; The water box is connected with the water receiving disc of the indoor unit of the air conditioner, so that the water box receives defrosting water from the water receiving disc.
9. The air conditioner of claim 8, wherein, The water box is connected with the water receiving disc through a water guide pipe, the inner bottom end of the water box is lower than the bottom end of the water receiving disc, and the inner top end of the water box is higher than the top end of the water receiving disc.
10. The air conditioner of claim 9, wherein, The position of the water receiving disc, which is close to the water guide pipe, is provided with a filtering component for filtering defrosting water flowing to the water box.

Description

Self-cleaning control method of air conditioner indoor unit and air conditioner Technical Field The invention belongs to the technical field of air conditioners, and particularly provides a self-cleaning control method of an air conditioner indoor unit and an air conditioner. Background With the progress of technology, some indoor units of air conditioners have applied self-cleaning technology. The self-cleaning technology refers to a technology that under the instruction of a specific program, the heat exchanger of the air conditioner indoor unit sublimates water vapor in the air into frost attached to the heat exchanger through the cold energy of the heat exchanger of the air conditioner, and then the frost is melted into water, so that the water washes out foreign matters (such as dust, dust and the like) on the heat exchanger, thereby realizing the cleaning of the heat exchanger of the air conditioner indoor unit. Through making the indoor set automatically cleaning heat exchanger of air conditioner, not only released user's both hands, but also ensured the heating, the refrigeration efficiency of air conditioner. Because the foreign matters adhered to the heat exchanger of the air conditioner indoor unit are often accompanied by bacteria, a large amount of water generated in the cleaning process of the air conditioner indoor unit cannot be utilized and can only be discharged outdoors, so that a large amount of water resources are wasted. Disclosure of Invention The invention aims to solve the problem that water generated in the self-cleaning process of the existing air conditioner indoor unit cannot be utilized because bacteria are carried by foreign matters in the air conditioner indoor unit. It is a further object of the invention to ensure that every part of the heat exchanger can be effectively sterilised. In order to achieve the above object, in a first aspect, the present invention provides a self-cleaning control method for an air conditioner indoor unit, wherein a heat exchanger of the air conditioner indoor unit has a photocatalyst coating, a light source for activating a photocatalyst is disposed in the air conditioner indoor unit, and the self-cleaning control method comprises: controlling the indoor unit of the air conditioner to enter a refrigeration mode, and operating for a first duration when the heat exchanger is below a first preset temperature so as to frost the surface of the heat exchanger; Activating a photocatalyst, namely controlling the light source to be electrified so as to activate the photocatalyst; and defrosting and cleaning, namely controlling the indoor unit of the air conditioner to enter a heating mode so as to defrost the heat exchanger. Optionally, between the frosting step and the activating photocatalyst step, the self-cleaning control method further includes: A defrosting and water-making step, wherein the air conditioner indoor unit is controlled to operate for a second time period when the heat exchanger is above a second preset temperature, so that the heat exchanger fuses the frost on the air conditioner indoor unit into water; And an icing step, wherein the air conditioner indoor unit is controlled to operate for a third time period when the heat exchanger is below a third preset temperature so that the heat exchanger freezes water on the surface of the heat exchanger into ice, and the third preset temperature is smaller than or equal to the first preset temperature. Optionally, the defrosting and water making step comprises the following steps: And controlling the air conditioner indoor unit to enter a heating mode, and controlling the air conditioner indoor unit to operate for a second time period when the heat exchanger is above a second preset temperature so as to enable the heat exchanger to fuse frost on the heat exchanger into water. Optionally, the defrosting and water making step comprises the following steps: Reducing the refrigerating power of the indoor unit of the air conditioner, and/or, And the rotating speed of the fan of the air conditioner indoor unit is increased. Optionally, the defrosting and water making step comprises the following steps: And controlling the air conditioner indoor unit to stop refrigerating, and continuing the second time period when the heat exchanger is above the second preset temperature. Optionally, between the icing step and the defrosting cleaning step, the self-cleaning control method further comprises: An deicing and sterilizing step, wherein the air conditioner indoor unit is controlled to operate for a fourth time period when the heat exchanger is above a fourth preset temperature, so that the heat exchanger can melt ice on the heat exchanger into water, and a motion environment is provided for substances with strong oxidability generated by a photocatalyst so as to sterilize; And controlling the air conditioner indoor unit to operate for a fifth time period when the heat exchanger is below a fifth preset tem