WO2020187236A1

WO2020187236A1 - Self-cleaning control method for air conditioner

Info

Publication number: WO2020187236A1
Application number: PCT/CN2020/079914
Authority: WO
Inventors: 于洋
Original assignee: 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2019-03-21
Filing date: 2020-03-18
Publication date: 2020-09-24
Also published as: CN109916050B; CN109916050A

Abstract

A self-cleaning control method for an air conditioner. In order to more precisely control self-cleaning of the air conditioner, the self-cleaning control method for the air conditioner comprises the following steps: in a process that the air conditioner runs a standard self-cleaning mode, detecting the current air outlet volume L of an air outlet of an indoor unit; detecting the current indoor air humidity T; and selectively adjusting a frosting time and/or a defrosting time of the standard self-cleaning mode according to the air outlet volume L and the indoor air humidity T. Compared with the fixed frosting time and defrosting time adopted by the existing self-cleaning mode, the frosting time and/or the defrosting time of the standard self-cleaning mode of the air conditioner can be precisely controlled according to the actual running working condition of the air conditioner, and therefore, the cleaning effect is greatly improved when the air conditioner runs in the self-cleaning mode, and the use experience of a user is improved.

Description

Air conditioner self-cleaning control method

Technical field

The invention belongs to the technical field of air conditioners, and specifically provides a self-cleaning control method for an air conditioner.

Background technique

The air conditioner is a device that can cool/heat the room. As time goes by, the dust accumulation on the indoor unit of the air conditioner will gradually increase. When the dust accumulation reaches a certain level, a large number of bacteria will breed, especially when the indoor air flows through the room. The air conditioner needs to be cleaned in time because it will carry a lot of dust and bacteria when it is running.

Now air conditioners mostly adopt a self-cleaning method, that is, by controlling the operation of the indoor unit, the evaporator is frosted first and then defrosted, and the evaporator is cleaned by defrosting. During the self-cleaning process of the existing air conditioner, both the frosting time and the defrosting time are fixed, and the fixed time is generally a value determined under ideal and specific test conditions. However, in the actual operation of the air conditioner, there may be some differences between the actual operating conditions and the ideal and specific test conditions. This leads to the problem of insufficient control accuracy when the air conditioner runs in accordance with the existing self-cleaning procedures. , Such as insufficient cleaning due to too short frosting time.

Therefore, a new air conditioner self-cleaning control method is proposed in the art to solve the above-mentioned problems.

Summary of the invention

In order to solve the above-mentioned problems in the prior art, that is, to more accurately control the self-cleaning of an air conditioner, the present invention provides a self-cleaning control method of an air conditioner. The indoor unit is self-cleaned in a manner, and the air conditioner self-cleaning control method includes the following steps: S110, detecting the current air volume of the air outlet of the indoor unit while the air conditioner is operating in the standard self-cleaning mode L; S120, detecting the current indoor air humidity T; S130, selectively adjusting the frosting time and/or defrosting time in the standard self-cleaning mode according to the outlet air volume L and the indoor air humidity T .

In the preferred embodiment of the above air conditioner self-cleaning control method, step S130 specifically includes: when the second preset air volume value <L <the first preset air volume value, and the second preset humidity value <T <the first preset air volume value The humidity value implements the standard self-cleaning mode of the air conditioner.

In the preferred embodiment of the above air conditioner self-cleaning control method, step S130 specifically includes: when the second preset air volume value <L <the first preset air volume value and T ≥ the first preset humidity value, the standard The frosting time of the self-cleaning mode is reduced by the first preset time.

In the preferred embodiment of the above air conditioner self-cleaning control method, step S130 specifically includes: when the second preset air volume value<L<the first preset air volume value and T≦the second preset humidity value, the standard The frosting time of the self-cleaning mode is increased by a second preset time.

In the preferred embodiment of the above air conditioner self-cleaning control method, step S130 specifically includes: when L≤the second preset air volume value and the second preset humidity value<T<the first preset humidity value, set the standard The frosting time in the self-cleaning mode is increased by a second preset time, and the defrosting time in the standard self-cleaning mode is increased by the first preset time.

In the preferred embodiment of the above air conditioner self-cleaning control method, step S130 specifically includes: when L≤the second preset air volume value and T≥the first preset humidity value, defrosting time of the standard self-cleaning mode Increase the first preset time.

In the preferred embodiment of the above air conditioner self-cleaning control method, step S130 specifically includes: when L ≤ a second preset air volume value and T ≤ a second preset humidity value, reducing the frosting time of the standard self-cleaning mode The third preset time is increased, and the defrosting time of the standard self-cleaning mode is increased by the first preset time.

In a preferred embodiment of the above air conditioner self-cleaning control method, the first preset time is any time between 0.5-1.5 minutes; the second preset time is any time between 4.5-5.5 minutes; The third preset time is any time between 9-11 minutes; and/or the first preset time is 1 minute; the second preset time is 5 minutes, and the third preset time For 10 minutes.

In a preferred embodiment of the above air conditioner self-cleaning control method, before step S110, the air conditioner self-cleaning control method further includes: real-time detection of the air volume of the air outlet of the indoor unit; when the air volume is satisfied When the conditions are preset, the air conditioner is operated in the standard self-cleaning mode.

In a preferred embodiment of the above-mentioned air conditioner self-cleaning control method, the preset condition is: the outlet air volume is lower than a first set value; or the preset condition is: indoor inspection every set time The average value of the air volume of the air outlet of the machine, and the average value is lower than the second set value; or the preset condition is: detecting the air volume L of the air outlet of the indoor unit when the fan is at different speeds _1. Calculate the difference △L between the output air volume L ₁ and L ₀ at the corresponding speed, and △L is higher than the third set value; where △L=L ₀ －L ₁ , L ₀ is Standard air volume values set at different speeds.

The present invention selectively adjusts the frosting time and/or defrosting time of the standard self-cleaning mode according to the air output L and the indoor air humidity T. Compared with the fixed frosting time and defrosting time used in the existing self-cleaning mode, the present invention can accurately control the frosting time and defrosting time of the standard self-cleaning mode of the air conditioner according to the actual operating conditions of the air conditioner , Thereby greatly improving the cleaning effect of the air conditioner during self-cleaning operation, thereby enhancing the user experience.

Description of the drawings

Fig. 1 is a main flow chart of the air conditioner self-cleaning control method of the present invention.

detailed description

In order to make the embodiments, technical solutions and advantages of the present invention more obvious, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Examples. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

The air conditioner self-cleaning control method provided by the present invention aims to more accurately control the self-cleaning of the air conditioner. The air conditioner of the present invention includes an indoor unit and an outdoor unit, and the indoor unit is self-cleaned by first frosting and then defrosting . Referring to Fig. 1, Fig. 1 is a main flowchart of the self-cleaning control method of an air conditioner of the present invention. As shown in Figure 1, the self-cleaning control method of the air conditioner of the present invention includes the following steps: S110, detecting the current air volume L of the air outlet of the indoor unit while the air conditioner is running in the standard self-cleaning mode; S120, detecting the current The indoor air humidity T; S130, according to the air output L and the indoor air humidity T, selectively adjust the frosting time and/or defrosting time of the standard self-cleaning mode.

In step S110, an air volume sensor (such as an ultrasonic flowmeter or a fan that can be driven by the air volume, etc.) can be placed at the air outlet of the indoor unit, and the air volume sensor is used to detect the air volume L of the air outlet of the indoor unit. In step S120, as an example, the indoor air humidity T may be detected by a humidity sensor.

Those skilled in the art can understand that when the heat exchanger of the indoor unit is dirty, the intensity of self-cleaning needs to be high, that is, thicker frost is required; when the heat exchanger of the indoor unit is relatively clean, self-cleaning needs The frost is slightly thinner. However, during the self-cleaning process of the existing air conditioner, both the frosting time and the defrosting time are fixed. Therefore, in order to more accurately control the self-cleaning of the air conditioner, in step S130, the following conditions can be specifically followed Adjust the frosting time and/or defrosting time in the self-cleaning mode.

Case 1: When the second preset air volume value <L <the first preset air volume value, and the second preset humidity value <T <the first preset humidity value, the air conditioner standard self-cleaning mode is executed. Specifically, the first preset air volume value and the second preset air volume value can be obtained by those skilled in the art through experiments. When the outlet air volume L is between the second preset air volume value and the first preset air volume value, it is determined The indoor unit heat exchanger is in a general dirty state. The second preset humidity value and the first preset humidity value can also be obtained by those skilled in the art through experiments. When the indoor air humidity T is between the second preset humidity value and the first preset humidity value, it is determined that the current indoor humidity is Humidity is a general humidity state. In this case, the standard self-cleaning mode of the air conditioner is executed, that is, the frosting/defrosting time in the self-cleaning mode is not increased or decreased.

Case 2: When the second preset air volume value<L<the first preset air volume value, and T≥the first preset humidity value, the frosting time of the standard self-cleaning mode is reduced by the first preset time. Specifically, as mentioned above, when the outlet air volume L is between the second preset air volume value and the first preset air volume value, it is determined that the indoor unit heat exchanger is in a general dirty state; when the indoor air humidity T is higher than When the first preset humidity value is used, it can be determined that the current indoor air humidity is in a humid state. In this case, the frosting time of the standard self-cleaning mode is reduced by the first preset time, and the defrosting time remains unchanged. The first preset time may be obtained by those skilled in the art according to experiments. For example, the first preset time may be 1 minute, or any time between 0.5 and 1.5 minutes.

Case 3: When the second preset air volume value<L<the first preset air volume value, and T≦the second preset humidity value, the frosting time of the standard self-cleaning mode is increased by the second preset time. Specifically, as mentioned above, when the outlet air volume L is between the second preset air volume value and the first preset air volume value, it is determined that the indoor unit heat exchanger is in a general dirty state; when the indoor air humidity T is lower than When the second preset humidity value is used, it can be determined that the current indoor air humidity is in a dry state. In this case, the frosting time of the standard self-cleaning mode is increased by the second preset time, and the defrosting time remains unchanged. The second preset time may be obtained by those skilled in the art according to experiments. For example, the second preset time may be 5 minutes, or any time between 4.5-5.5 minutes.

Case 4: When L ≤ the second preset air volume value, and the second preset humidity value <T <the first preset humidity value, the frosting time of the standard self-cleaning mode is increased by the second preset time, and the standard self-cleaning mode The defrosting time of the cleaning mode is increased by the first preset time. Specifically, when the outlet air volume L is lower than the second preset air volume value, it can be determined that the indoor unit heat exchanger is in a severely dirty state; when the indoor air humidity T is between the second preset humidity value and the first preset humidity value During the period, it is judged that the current indoor humidity is the normal humidity state. In this case, the frosting time of the standard self-cleaning mode is increased by the second preset time, and the defrosting time of the standard self-cleaning mode is increased by the first preset time. The first preset time and the second preset time may be obtained by those skilled in the art according to experiments. For example, the first preset time may be 1 minute, or any time between 0.5-1.5 minutes, and the second preset time The time can be 5 minutes, or any time between 4.5-5.5 minutes.

Situation five: when L≤the second preset air volume value and T≥the first preset humidity value, increase the defrosting time of the standard self-cleaning mode by the first preset time. Specifically, when the outlet air volume L is lower than the second preset air volume value, it can be determined that the indoor unit heat exchanger is in a severely dirty state; when the indoor air humidity T is higher than the first preset humidity value, it can be determined that the current indoor unit The air humidity is humid. In this case, the defrosting time of the standard self-cleaning mode is increased by the first preset time, and the frosting time remains unchanged. The first preset time may be obtained by those skilled in the art according to experiments. For example, the first preset time may be 1 minute, or any time between 0.5 and 1.5 minutes.

Case 6: When L≤the second preset air volume value and T≤the second preset humidity value, increase the frosting time of the standard self-cleaning mode by the third preset time, and increase the defrosting time of the standard self-cleaning mode The first preset time. Specifically, when the outlet air volume L is lower than the second preset air volume value, it can be determined that the indoor unit heat exchanger is in a severely dirty state; when the indoor air humidity T is lower than the second preset humidity value, it can be determined that the current indoor unit The air humidity is dry. In this case, the frosting time of the standard self-cleaning mode is increased by the third preset time, and the defrosting time of the standard self-cleaning mode is increased by the first preset time. The third preset time and the first preset time can be obtained by those skilled in the art according to experiments. For example, the third preset time can be 10 minutes, or any time between 9-11 minutes, the first preset The time can be 1 minute, or any time between 0.5-1.5 minutes.

It needs to be explained again that the first preset air volume value and the second preset air volume value mentioned above can be obtained by those skilled in the art through experiments, specifically when the heat exchanger of the indoor unit is in a general dirty state obtained through experimental data The range of the air volume of the indoor unit, and the highest value of the air volume when the heat exchanger of the indoor unit is in a severely polluted state (the highest value is the range of the air volume when the heat exchanger of the indoor unit is in a general dirty state The lowest value of the range). In the same way, the first preset humidity value and the second preset humidity value can also be obtained by those skilled in the art through experiments. Specifically, the interval range when the indoor air humidity is at the general humidity is obtained through test data, and the interval range is determined After that, if the indoor air humidity is higher than the upper limit of the interval range, it means that the indoor air humidity is in a humid state; if the indoor air humidity is lower than the lower limit of the interval range, it means that the indoor air humidity is dry. In addition, the first preset time, the second preset time, and the third preset time can also be obtained by those skilled in the art through experiments.

In a more specific implementation, before performing step S110, the air self-cleaning control method of the present invention first performs the following steps: real-time detection of the air volume of the air outlet of the indoor unit; when the air volume meets the preset condition, Make the air conditioner run the standard self-cleaning mode. The air volume can be detected by the air volume sensor installed at the air outlet of the indoor unit.

As an example, the preset condition may be: the outlet air volume is lower than the first set value. Specifically, when the air conditioner is in normal operation (the heat exchanger of the indoor unit is not blocked), when the speed of the indoor fan is constant, the air volume of the air outlet of the indoor unit is also constant, and after the heat exchanger is blocked, The air volume will also decrease accordingly. In this case, we can set a first set value, which can be obtained by those skilled in the art through experiments. When the air output is lower than the first set value, it can be judged that the indoor unit The heat exchanger is dusty and needs to be cleaned.

As another example, the preset condition may also be: detecting the average value of the air output from the air outlet of the indoor unit every set time, and the average value is lower than the second set value. As described above, in order to more accurately determine the timing of the air conditioner entering the self-cleaning, it is also possible to collect multiple air volumes, calculate the average value, and compare the average values to more accurately determine the timing of the air conditioner entering the self-cleaning. The second set value can be obtained by those skilled in the art through experiments.

As another example, the preset condition may also be: detecting the air volume L ₁ of the air outlet of the indoor unit when the fan is at different speeds, and calculating the difference △L between the air volume L ₁ and L ₀ at the corresponding speed. , And △L is higher than the third setting value; among them, △L=L ₀ -L ₁ , L ₀ is the standard air volume value set by the fan at different speeds. Specifically, L ₀ is the standard air volume value set by the fan at different speeds, that is, when the heat exchanger of the indoor unit has no dust, the corresponding air volume of the indoor fan at different speeds. By comparing the current air volume L ₁ with the corresponding standard air volume value L ₀ , it is possible to accurately determine the degree of dust on the indoor unit heat exchanger, and then to more accurately determine whether to make the air conditioner enter self-cleaning.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, those skilled in the art will readily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

A self-cleaning control method for an air conditioner, the air conditioner includes an indoor unit and self-cleans the indoor unit by first forming frost and then defrosting, wherein the self-cleaning control method of the air conditioner includes the following steps :

S110: Detecting the current air outlet air volume L of the air outlet of the indoor unit during the operation of the standard self-cleaning mode of the air conditioner;

S120. Detect the current indoor air humidity T;

S130: Selectively adjust the frosting time and/or defrosting time of the standard self-cleaning mode according to the air outlet volume L and the indoor air humidity T.
The self-cleaning control method of an air conditioner according to claim 1, wherein step S130 specifically includes:

When the second preset air volume value<L<the first preset air volume value and the second preset humidity value<T<the first preset humidity value, the standard self-cleaning mode of the air conditioner is executed.
The self-cleaning control method of an air conditioner according to claim 1, wherein step S130 specifically includes:

When the second preset air volume value<L<the first preset air volume value and T≥the first preset humidity value, the frosting time of the standard self-cleaning mode is reduced by the first preset time.
The self-cleaning control method of an air conditioner according to claim 1, wherein step S130 specifically includes:

When the second preset air volume value<L<the first preset air volume value and T≦the second preset humidity value, the frosting time of the standard self-cleaning mode is increased by the second preset time.
The self-cleaning control method of an air conditioner according to claim 1, wherein step S130 specifically includes:

When L≤the second preset air volume value and the second preset humidity value<T<the first preset humidity value, the frosting time of the standard self-cleaning mode is increased by the second preset time, and the standard The defrosting time of the self-cleaning mode is increased by the first preset time.
The self-cleaning control method of an air conditioner according to claim 1, wherein step S130 specifically includes:

When L≦the second preset air volume value and T≧the first preset humidity value, the defrosting time of the standard self-cleaning mode is increased by the first preset time.
The self-cleaning control method of an air conditioner according to claim 1, wherein step S130 specifically includes:

When L≤the second preset air volume value and T≤the second preset humidity value, increase the frosting time of the standard self-cleaning mode by a third preset time, and change the defrosting time of the standard self-cleaning mode Increase the first preset time.
The air conditioner self-cleaning control method according to any one of claims 3 to 7, characterized in that,

The first preset time is any time between 0.5-1.5 minutes; the second preset time is any time between 4.5-5.5 minutes; the third preset time is between 9-11 minutes At any time; and/or

The first preset time is 1 minute; the second preset time is 5 minutes, and the third preset time is 10 minutes.
The air conditioner self-cleaning control method according to any one of claims 1 to 7, characterized in that, before step S110, the air conditioner self-cleaning control method further comprises:

Real-time detection of the air volume of the air outlet of the indoor unit;

When the outlet air volume meets a preset condition, the air conditioner is operated in the standard self-cleaning mode.
The self-cleaning control method of an air conditioner according to claim 9, wherein the preset condition is: the outlet air volume is lower than a first set value;

Or the preset condition is: detecting the average value of the air volume of the air outlet of the indoor unit every set time, and the average value is lower than the second set value;

Or the preset condition is: detecting the air output L 1 of the air outlet of the indoor unit when the fan is at different speeds, calculating the difference ΔL between the air output L 1 and L 0 at the corresponding speed, and △L is higher than the third set value;

Among them, △L=L 0 -L 1 , L 0 is the standard air volume value set by the fan at different speeds.