WO2024016834A1

WO2024016834A1 - Method and apparatus for detecting leakage of valve box of air conditioner having three pipes for heating and cooling at the same time and electronic device

Info

Publication number: WO2024016834A1
Application number: PCT/CN2023/096251
Authority: WO
Inventors: 隋志蔚; 卢大海; 何建奇; 远义忠; 马进娟; 王永爽; 王罗莎
Original assignee: 青岛海尔空调电子有限公司; 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2022-07-18
Filing date: 2023-05-25
Publication date: 2024-01-25
Also published as: CN117450622A

Abstract

The present application relates to the technical field of air conditioners. Disclosed is a method for detecting leakage of a valve box of an air conditioner having three pipes for heating and cooling at the same time, comprising: acquiring a temperature of a low-pressure air pipe in the valve box, and according to the temperature of the low-pressure air pipe, determining whether refrigerant leakage occurs in the valve box. When refrigerant leakage occurs in the valve box, the temperature of the low-pressure air pipe in the valve box will be changed. Therefore, for the air conditioner having three pipes for heating and cooling at the same time, by detecting the temperature change of the low-pressure air pipe in the valve box, whether refrigerant leakage occurs in the valve box can be determined, thus achieving an effective detection of refrigerant leakage in the valve box. Further disclosed in the present application are an apparatus for detecting leakage of a valve box of an air conditioner having three pipes for heating and cooling at the same time, and an electronic device.

Description

[Corrected in accordance with Rule 26 20.06.2023] Methods and devices and electronic equipment for detecting valve box leakage of three-pipe simultaneous heating and cooling air conditioners

This application is filed based on a Chinese patent application with application number 202210840552.8 and a filing date of July 18, 2022, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application as a reference.

Technical field

This application relates to the technical field of air conditioners, for example, to a method, device, and electronic equipment for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner.

Background technique

The traditional two-pipeline (air pipe, liquid pipe) multi-split unit can only realize the same cooling or heating mode in the indoor unit, while the three-pipeline (high-pressure air pipe, low-pressure air pipe, high-pressure liquid pipe) simultaneous cooling and heating air conditioner has the same outdoor With the help of the valve box corresponding to each indoor unit, the unit can realize independent cooling or heating modes of the indoor units as needed, that is, some of the indoor units are cooling and the remaining indoor units are heating. During the operation of the three-pipe simultaneous heating and cooling air conditioner, if the valve box leaks refrigerant, the cooling or heating effect of the three-pipe simultaneous heating and cooling air conditioner will be deteriorated. It may also cause the refrigerant to enter the compressor, causing damage to the compressor. damage. In the related technology, there is no effective detection solution for refrigerant leakage in the valve box.

Contents of the invention

In order to provide a basic understanding of some aspects of the disclosed embodiments, a simplified summary is provided below. This summary is not intended to be a general review, nor is it intended to identify key/important elements or delineate the scope of the embodiments, but is intended to serve as a prelude to the detailed description that follows.

Embodiments of the present disclosure provide a method, device, and electronic device for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner, which can detect whether refrigerant leakage occurs in the valve box.

In some embodiments, the outdoor unit of the three-pipe simultaneous heating and cooling air conditioner is connected to the air pipe of the indoor unit through the low-pressure air pipe and the high-pressure air pipe through the valve box, and the valve box is used to switch between high and low pressure refrigerants. The method includes : Obtain the temperature of the low-pressure air pipe in the valve box, and determine whether refrigerant leakage occurs in the valve box based on the temperature of the low-pressure air pipe.

In some embodiments, the device includes a processor and a memory storing program instructions, and the processor is configured to, when running the program instructions, execute a method for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner. method.

In some embodiments, the electronic device includes the above-mentioned device for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner.

The method, device, and electronic equipment for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner provided by embodiments of the present disclosure can achieve the following technical effects: the temperature of the low-pressure air pipe in the valve box can be obtained, and based on the temperature of the low-pressure air pipe, Determine whether refrigerant leakage occurs in the valve box. When refrigerant leaks from the valve box, the temperature of the low-pressure air pipe inside the valve box will change. Therefore, for three-pipeline simultaneous heating and cooling air conditioners, by detecting the temperature changes of the low-pressure air pipes in the valve box, it can be determined whether refrigerant leakage has occurred in the valve box. Effective detection of refrigerant leakage in the valve box is achieved.

The above general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by corresponding drawings. These exemplary descriptions and drawings do not constitute limitations to the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings are not limited to scale and in which:

Figure 1 is a schematic structural diagram of a three-pipe simultaneous heating and cooling air conditioner;

Figure 2 is a schematic diagram of a method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner provided by an embodiment of the present disclosure;

Figure 3 is a schematic diagram of another method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner provided by an embodiment of the present disclosure;

Figure 4 is a schematic diagram of another method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner provided by an embodiment of the present disclosure;

Figure 5 is a schematic diagram of another method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner provided by an embodiment of the present disclosure;

Figure 6 is a schematic diagram of a device for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner provided by an embodiment of the present disclosure.

Detailed ways

In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for convenience of explanation, multiple details are provided to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified to simplify the drawings.

The terms "first", "second", etc. in the description and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that data so used are interchangeable under appropriate circumstances for the purposes of the embodiments of the disclosure described herein. Furthermore, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

Unless otherwise stated, the term "plurality" means two or more.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an "or" relationship. For example, A/B means: A or B.

The term "and/or" is an association relationship describing objects, indicating that three relationships can exist. For example, A and/or B means: A or B, or A and B.

The term "correspondence" can refer to an association relationship or a binding relationship. The correspondence between A and B refers to an association relationship or a binding relationship between A and B.

In the embodiments of the present disclosure, smart home appliances refer to home appliances that are formed by introducing microprocessors, sensor technology, and network communication technology into home appliances. They have the characteristics of intelligent control, smart perception, and smart applications. The operation process of smart home appliances often Relying on the application and processing of modern technologies such as the Internet of Things, the Internet, and electronic chips, for example, smart home appliances can be connected to electronic devices to enable users to remotely control and manage smart home appliances.

In the disclosed embodiment, the three-pipeline simultaneous heating and cooling air conditioner includes one outdoor unit and multiple indoor units, and each indoor unit has a corresponding valve box. The same outdoor unit of the three-pipe simultaneous heating and cooling air conditioner can realize independent cooling or heating modes of the indoor units according to the needs with the help of the valve boxes corresponding to each indoor unit, that is, some of the indoor units are cooling and the remaining indoor units are heating. . The outdoor unit of the three-pipe simultaneous heating and cooling air conditioner is connected to the corresponding indoor unit air pipe through a low-pressure air pipe and a high-pressure air pipe through a valve box. The valve box is used to switch between high and low pressure refrigerants. An indoor unit air pipe temperature sensor is provided on the air pipe of the indoor unit. The outdoor unit is connected to the indoor unit liquid pipe through a high-pressure liquid pipe. A high-pressure valve is provided on the high-pressure air pipe in the valve box, that is, the high-pressure valve is an electronic expansion valve installed on the high-pressure air pipe in the valve box. A low-pressure valve is provided on the low-pressure air pipe in the valve box, that is, the low-pressure valve is an electronic expansion valve installed on the low-pressure air pipe in the valve box. The low-pressure air pipe in the valve box is also provided with a low-pressure air pipe temperature sensor.

Combined with what is shown in Figure 1, Figure 1 is a schematic diagram of the structure of a three-pipe simultaneous cooling and heating air conditioner. The three-pipe simultaneous cooling and heating air conditioner in Figure 1 includes one outdoor unit and four indoor units. That is, outdoor unit 1, first valve box 2, first indoor unit 3, second valve box 4, second indoor unit 5, third valve box 6, third indoor unit 7, fourth valve box 8, fourth indoor unit Machine 9. The high-pressure air pipe in the first valve box 2 is provided with a first high-pressure valve 21, and the low-pressure air pipe in the first valve box 2 is provided with a first low-pressure valve 22 and a first low-pressure air pipe temperature sensor 23; A first indoor unit air pipe temperature sensor 10 is provided on the air pipe of the indoor unit. The high-pressure air pipe in the second valve box 4 is provided with a second high-pressure valve 41, and the low-pressure air pipe in the second valve box 4 is provided with a second low-pressure valve 42 and a second low-pressure air pipe temperature sensor 43; A second indoor unit air pipe temperature sensor 11 is provided on the air pipe of the indoor unit. The high-pressure air pipe in the third valve box 6 is provided with a third high-pressure valve 61, and the low-pressure air pipe in the third valve box 6 is provided with a third low-pressure valve 62 and a third low-pressure air pipe temperature sensor 63; A third indoor unit air pipe temperature sensor 12 is provided on the air pipe of the indoor unit. The high-pressure air pipe in the fourth valve box 8 is provided with a fourth high-pressure valve 81, and the low-pressure air pipe in the fourth valve box 8 is provided with a fourth low-pressure valve 82 and a fourth low-pressure air pipe temperature sensor 83; the fourth indoor unit 9 A fourth indoor unit air pipe temperature sensor 13 is provided on the air pipe of the indoor unit.

When the first indoor unit 3 is shut down, the first high-pressure valve 21 in the first valve box 2 is closed, and the first low-pressure valve 22 in the first valve box 2 is also closed. When the second indoor unit 5 performs heating, the second high-pressure valve 41 in the second valve box 4 is opened, and the second low-pressure valve 42 in the second valve box 4 is closed. When the third indoor unit 7 performs cooling, the third high-pressure valve 61 in the third valve box 6 is closed, and the third low-pressure valve 62 in the third valve box 6 is opened. When the fourth indoor unit 9 performs cooling, the fourth high-pressure valve 81 in the fourth valve box 8 is closed, and the fourth low-pressure valve 82 in the fourth valve box 8 is opened.

As shown in FIG. 2 , an embodiment of the present disclosure provides a method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner, including:

Step S201: The electronic device obtains the temperature of the low-pressure air pipe in the valve box.

Step S202: The electronic device determines whether refrigerant leakage occurs in the valve box based on the temperature of the low-pressure air pipe in the valve box.

Using the method for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner provided by an embodiment of the present disclosure, the temperature of the low-pressure air pipe in the valve box can be obtained, and based on the temperature of the low-pressure air pipe in the valve box, it can be determined whether refrigerant has occurred in the valve box. Give way. When refrigerant leaks from the valve box, the temperature of the low-pressure air pipe inside the valve box will change. Therefore, for a three-pipe simultaneous heating and cooling air conditioner, by detecting the temperature change of the low-pressure air pipe in the valve box, it can be determined whether refrigerant leakage has occurred in the valve box. Effective detection of refrigerant leakage in the valve box is achieved.

Optionally, a high-pressure valve is provided on the high-pressure air pipe in the valve box to obtain the temperature of the low-pressure air pipe in the valve box, including: when the high-pressure valve in the valve box is closed, the electronic device obtains the temperature of the low-pressure air pipe in the valve box. temperature. By closing the high-pressure valve on the high-pressure air pipe in the valve box, the refrigerant flows through the low-pressure air pipe in the valve box to achieve indoor unit cooling. During the cooling process of the indoor unit, under normal circumstances, the difference between the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature is less than the first preset temperature. If the high-pressure valve in the valve box leaks refrigerant, the high-temperature and high-pressure refrigerant in the high-pressure gas pipe in the valve box will leak into the low-pressure gas pipe, causing the temperature of the low-pressure gas pipe to change. Therefore, when the indoor unit is cooling, that is, when the high-pressure valve in the valve box is closed, detecting the temperature of the low-pressure air pipe in the valve box can determine whether the high-pressure valve in the valve box has leaked refrigerant, and thus can detect whether the valve box is leaking. A refrigerant leak has occurred.

Further, a low-pressure air pipe temperature sensor is provided on the low-pressure air pipe in the valve box to obtain the temperature of the low-pressure air pipe in the valve box, including: obtaining the temperature of the low-pressure air pipe in the valve box through the low-pressure air pipe temperature sensor.

Optionally, the three-pipeline simultaneous heating and cooling air conditioner determines whether refrigerant leakage occurs in the valve box based on the temperature of the low-pressure air pipe in the valve box, including: obtaining the indoor ambient temperature, and the difference between the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature. If the value is greater than or equal to the first preset temperature and lasts for the first preset time, it is determined that refrigerant leakage occurs in the valve box. In this way, when the indoor unit is cooling, that is, when the high-pressure valve in the valve box is closed, it is detected that the difference between the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature is greater than or equal to the first preset temperature, and continues for the first time. After the preset time, it is determined that the high-pressure valve in the valve box has refrigerant leakage, and then it is determined that the valve box has refrigerant leakage.

In some embodiments, when the indoor unit is cooling, the high-pressure valve in the corresponding valve box is in a closed state, and the temperature of the low-pressure air pipe is obtained as Tliqsc1 through the low-pressure air pipe temperature sensor on the low-pressure air pipe in the valve box. The indoor ambient temperature reached is Tai. Then when Tliqsc1≥Tai+E, it is determined that refrigerant leakage occurs in the valve box. Among them, E is the first preset temperature.

As shown in FIG. 3 , an embodiment of the present disclosure provides a method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner, including:

Step S301: When the high-pressure valve in the valve box is closed, the electronic device obtains the temperature of the low-pressure air pipe in the valve box.

Step S302: The electronic device obtains the indoor ambient temperature.

Step S303: The electronic device determines that refrigerant leakage occurs in the valve box when the difference between the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature is greater than or equal to the first preset temperature and lasts for the first preset time.

Using the method for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner provided by an embodiment of the present disclosure, the valve box can be determined by detecting the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature during the cooling process of the indoor unit. Check whether there is a refrigerant leakage from the high-pressure valve inside. Effective detection of refrigerant leakage in the valve box is achieved.

Optionally, the electronic device determines that refrigerant leakage occurs in the valve box based on the temperature of the low-pressure air pipe in the valve box, including: the electronic device obtains the temperature of the air pipe of the indoor unit. When the difference between the temperature of the low-pressure air pipe in the valve box and the temperature of the indoor unit air pipe is greater than or equal to the second preset temperature and lasts for the first preset time, it is determined that refrigerant leakage occurs in the valve box. By closing the high-pressure valve on the high-pressure air pipe in the valve box, the refrigerant flows through the low-pressure air pipe in the valve box to achieve indoor unit cooling. During the cooling process of the indoor unit, under normal circumstances, the difference between the temperature of the low-pressure air pipe in the valve box and the temperature of the air pipe of the indoor unit is less than the second preset temperature. If the high-pressure valve in the valve box leaks refrigerant, the high-temperature and high-pressure refrigerant will leak into the low-pressure gas pipe, causing the temperature of the low-pressure gas pipe to change. Therefore, when the indoor unit is cooling, that is, when the high-pressure valve in the valve box is closed, detecting the temperature of the low-pressure air pipe in the valve box and the temperature of the indoor unit air pipe can determine whether the high-pressure valve in the valve box has leaked refrigerant, thereby Able to detect whether refrigerant leakage occurs in the valve box. In this way, when the indoor unit is cooling, that is, when the high-pressure valve in the valve box is closed, it is detected that the difference between the temperature of the low-pressure air pipe in the valve box and the temperature of the indoor unit air pipe is greater than or equal to the second preset temperature, and continues for the first time. After the preset time, it is determined that the high-pressure valve in the valve box has refrigerant leakage, and then it is determined that the valve box has refrigerant leakage.

Further, an indoor unit air pipe temperature sensor is provided on the indoor unit air pipe to obtain the temperature of the indoor unit air pipe, including: obtaining the temperature of the indoor unit air pipe through the indoor unit air pipe temperature sensor.

In some embodiments, when the indoor unit is cooling, the high-pressure valve in the corresponding valve box is in a closed state, and the temperature of the low-pressure air pipe is Tliqsc ₁ obtained through the low-pressure air pipe temperature sensor on the low-pressure air pipe in the valve box, The temperature of the indoor unit air pipe is obtained as TCl through the indoor unit air pipe temperature sensor on the indoor unit air pipe. In the case of Tliqsc ₁ ≥TCl+F, it is determined that refrigerant leakage occurs in the valve box, where F is the second preset temperature.

As shown in FIG. 4 , an embodiment of the present disclosure provides another method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner, including:

Step S401: When the high-pressure valve in the valve box is closed, the electronic device obtains the temperature of the low-pressure air pipe in the valve box.

Step S402: The electronic device obtains the temperature of the air pipe of the indoor unit.

Step S403: The electronic device determines that refrigerant leakage occurs in the valve box when the difference between the temperature of the low-pressure air pipe in the valve box and the temperature of the indoor unit air pipe is greater than or equal to the second preset temperature and lasts for the first preset time.

Using the method for detecting leakage of the valve box of the three-pipe simultaneous heating and cooling air conditioner provided by the embodiment of the present disclosure, it is possible to determine the temperature of the low-pressure air pipe in the valve box and the temperature of the indoor unit air pipe during the cooling process of the indoor unit. Check whether the high-pressure valve in the valve box has refrigerant leakage. Effective detection of refrigerant leakage in the valve box is achieved.

Optionally, a low-pressure valve is provided on the low-pressure air pipe in the valve box, and obtaining the temperature of the low-pressure air pipe in the valve box includes: obtaining the temperature of the low-pressure air pipe in the valve box when the low-pressure valve in the valve box is closed. By closing the low-pressure valve on the low-pressure air pipe in the valve box, the refrigerant flows through the high-pressure air pipe in the valve box to achieve indoor heating. During the heating process of the indoor unit, under normal circumstances, the temperature of the low-pressure air pipe in the valve box will become closer and closer to the indoor ambient temperature. After the simultaneous cooling and heating air conditioning of the three pipes is stabilized, the temperature of the low-pressure air pipe in the valve box will be the same as the indoor ambient temperature. The difference in ambient temperature is less than the third preset temperature. If the low-pressure valve in the valve box leaks refrigerant, the high-temperature and high-pressure refrigerant in the valve box will leak into the low-pressure air pipe, causing the temperature of the low-pressure air pipe in the valve box to rise, which may cause the difference between the low-pressure air pipe temperature and the indoor ambient temperature to be greater than Or equal to the third preset temperature. Therefore, when the indoor machine is heating, that is, when the low-pressure valve in the valve box is closed, detecting the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature can determine whether the low-pressure valve in the valve box has leaked refrigerant, thereby detecting Is there any refrigerant leakage from the valve outlet box?

Optionally, the electronic device determines whether refrigerant leakage occurs in the valve box based on the temperature of the low-pressure air pipe in the valve box, including: obtaining the indoor ambient temperature. The difference between the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature is greater than or equal to When the third preset temperature persists for the first preset time, it is determined that refrigerant leakage occurs in the valve box. In this way, when the indoor machine is heating, that is, when the low-pressure valve in the valve box is closed, it is detected that the difference between the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature is greater than or equal to the third preset temperature, and continues for the first time. After the preset time, it is determined that the low-pressure valve in the valve box has refrigerant leakage, and then it is determined that the valve box has refrigerant leakage.

In some embodiments, when the indoor unit is heating, the low-pressure valve in the corresponding valve box is in a closed state, and the temperature of the low-pressure air pipe is Tliqsc ₂ obtained through the low-pressure air pipe temperature sensor on the low-pressure air pipe in the valve box, The obtained indoor ambient temperature is Tai. Then when Tliqsc ₂ ≥Tai+G, it is determined that refrigerant leakage occurs in the valve box. Among them, G is the third preset temperature.

As shown in FIG. 5 , an embodiment of the present disclosure provides another method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner, including:

Step S501: When the low-pressure valve in the valve box is closed, the electronic device obtains the temperature of the low-pressure air pipe.

Step S502: The electronic device obtains the indoor ambient temperature.

Step S503: The electronic device determines that the valve box leaks when the difference between the temperature of the low-pressure air pipe in the valve box and the indoor ambient temperature is greater than or equal to the third preset temperature and continues for the first preset time.

Using the method for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner provided by an embodiment of the present disclosure, the valve can be determined by detecting the temperature of the low-pressure air pipe in the valve box and the temperature of the indoor environment during the heating process of the indoor machine. Check whether the low-pressure valve in the box has refrigerant leakage. Effective detection of refrigerant leakage in the valve box is achieved.

Optionally, after the electronic device determines that the valve box leaks, it further includes: controlling the high-pressure valve in the valve box to reset according to a preset first reset operation. The first reset operation includes a preset number of reset adjustments. When it is detected that the valve box is leaking, by performing a preset number of reset adjustments on the high-pressure valve in the valve box, the high-pressure valve in the valve box can be reset in a timely manner. , to avoid the leakage of refrigerant from the high-pressure valve in the valve box, which will affect the cooling effect of the three-pipeline simultaneous heating and cooling air conditioner, and even cause damage to the compressor, so that the three-pipeline simultaneous cooling and heating air conditioner can operate normally.

Further, the first reset operation includes: within the second preset time, first control the high-pressure valve in the valve box to perform the first reset adjustment; if the valve box is still in the refrigerant leakage state after the first reset adjustment, then Perform the second reset adjustment; if the valve box does not leak refrigerant after the first reset adjustment, stop the reset operation; if the valve box is still leaking refrigerant after the second reset adjustment, perform the third reset operation. Reset adjustment; if there is no refrigerant leakage from the valve box after the second reset adjustment, stop the reset operation. Since the number of resets of the high-pressure valve in the valve box is limited, the electronic device performs corresponding reset adjustments based on the refrigerant leakage of the high-pressure valve in the valve box, instead of performing the same number of resets regardless of the leakage of the high-pressure valve in the valve box. Reset, thereby extending the service life of the high-pressure valve in the valve box.

Further, the first reset adjustment includes: first opening the high-pressure valve in the control valve box for a first preset number of steps, and then closing for a second preset number of steps.

Further, the second reset adjustment includes: the high-pressure valve in the control valve box first opens the first preset number of steps, and then closes the third preset number of steps.

Further, the third reset adjustment includes: the high-pressure valve in the control valve box first opens the first preset number of steps, and then closes the fourth preset number of steps. The second preset step number is less than or equal to the third preset step number, and the third preset step number is less than or equal to the fourth preset step number.

When the high-pressure valve in the valve box performs the first reset operation, as the number of reset adjustments of the high-pressure valve in the valve box increases, the number of steps to close the high-pressure valve also gradually increases. In this way, the high-pressure valve in the valve box When the valve is in a serious refrigerant leakage state, the success rate of repairing the high-pressure valve can be improved by gradually increasing the number of steps to close the high-pressure valve in the valve box.

Optionally, after the electronic device determines that refrigerant leakage occurs in the valve box, it further includes: controlling the low-pressure valve in the valve box to reset according to a preset second reset operation. The second reset operation includes a preset number of reset adjustments. When it is detected that the valve box is leaking, by performing a preset number of reset adjustments on the low-pressure valve in the valve box, the low-pressure valve in the valve box can be reset in time. , avoiding the leakage of refrigerant from the low-pressure valve in the valve box, affecting the heating effect of the three-pipeline simultaneous heating and cooling air conditioner, and even causing damage to the compressor, so that the three-pipeline simultaneous heating and cooling air conditioner can operate normally.

Within the second preset time, first control the low-pressure valve in the valve box to perform the first reset adjustment; if the valve box is still in the refrigerant leakage state after the first reset adjustment, perform the second reset adjustment; After the first reset adjustment, if there is no refrigerant leakage in the valve box, stop the reset operation; if after the second reset adjustment, the valve box is still in the refrigerant leakage state, perform the third reset adjustment; if after the second reset adjustment, the valve box is still in the refrigerant leakage state, After adjustment, if there is no refrigerant leakage from the valve box, stop the reset operation. Since the number of resets of the low-pressure valve in the valve box is limited, the electronic device performs corresponding reset adjustments based on the refrigerant leakage of the low-pressure valve in the valve box, instead of performing the same number of resets regardless of the leakage of the low-pressure valve in the valve box. Reset, thereby extending the service life of the low-pressure valve in the valve box.

Further, the first reset adjustment includes: the low-pressure valve in the control valve box first opens the first preset number of steps, and then closes the fifth preset number of steps.

Further, the second reset adjustment includes: the low-pressure valve in the control valve box first opens the first preset number of steps, and then closes the sixth preset number of steps.

Further, the third reset adjustment includes: the low-pressure valve in the control valve box first opens the first preset number of steps, and then closes the seventh preset number of steps. The fifth preset number of steps is less than or equal to the sixth preset number, and the sixth preset number is less than or equal to the seventh preset number.

When the low-pressure valve in the valve box performs the second reset operation, as the number of reset adjustments of the low-pressure valve in the valve box increases, the number of steps to close the low-pressure valve also gradually increases. In this way, the low pressure in the valve box When the valve is in a serious refrigerant leakage state, the success rate of repairing the low-pressure valve can be improved by gradually increasing the number of steps to close the low-pressure valve in the valve box.

Optionally, the second preset number of steps may be the same as the fifth preset number of steps, or may be different from the fifth preset number of steps. The third preset number of steps may be the same as the sixth preset number of steps, or may be different from the sixth preset number of steps. The fourth preset step number may be the same as the seventh preset step number, or may be different from the seventh preset step number.

In some examples, after detecting refrigerant leakage in the high-pressure valve in the valve box, the high-pressure valve in the control valve box performs the first reset adjustment, that is, first opens αpls (step), and then closes θ ₁ pls, θ ₁ = α+λ ₁ +β ₁ +200pls, where α is the first preset number of steps, λ ₁ is the current opening of the high-pressure valve in the valve box, and β ₁ is the second preset number of steps. If the high-pressure valve in the valve box is still leaking after the first reset adjustment, control the high-pressure valve to open αpls again, and then close θ ₂ pls, θ ₂ =α+λ ₂ +β ₂ +200pls, where, λ ₂ is the opening of the high-pressure valve after the first reset adjustment, and β ₂ is the third preset number of steps. If the high-pressure valve in the valve box is still leaking after the second reset adjustment, control the high-pressure valve to open αpls again, and then close θ ₃ pls, θ ₃ =α+λ ₃ +β ₃ +200pls, where, λ ₃ is the opening of the high-pressure valve after the second reset adjustment, and β ₃ is the fourth preset step number. Among them, β ₁ ≤ _{β 2} ≤ _{β 3} , and α, λ ₁ , λ ₂ , λ ₃ , β ₁ , β ₂ , and β ₃ are all positive integers. A first reset operation is performed on the high-pressure valve within a second preset time, such as 8 hours, that is, a maximum of 3 reset adjustments are performed.

When the high-pressure valve in the valve box has a slight refrigerant leakage, it only needs to be reset and adjusted once to repair the high-pressure valve in the valve box. When the high-pressure valve in the valve box is in a serious refrigerant leakage state, the high-pressure valve in the valve box needs to be reset and adjusted twice to repair the high-pressure valve in the valve box. When the high-pressure valve in the valve box is in a serious refrigerant leakage state, In the normal state, the high-pressure valve in the valve box needs to be reset and adjusted three times to repair the high-pressure valve in the valve box. Since the number of resets of the high-pressure valve in the valve box is limited, depending on the refrigerant leakage of the high-pressure valve in the valve box Perform the corresponding reset adjustment. When the high-pressure valve in the valve box is in a slight refrigerant leakage state, the high-pressure valve in the valve box can be repaired without performing three reset adjustments, thus prolonging the high-pressure valve in the valve box. valve service life.

In some examples, after detecting leakage of the low-pressure valve in the valve box, the low-pressure valve in the control valve box performs the first reset adjustment, that is, first opens αpls, and then closes δ ₁ pls, δ ₁ =α+γ ₁ + eta ₁ +200pls, where γ ₁ is the current opening of the low-pressure valve in the valve box, and eta ₁ is the fifth reset step number. If the low-pressure valve in the valve box is still leaking after the first reset adjustment, control the low-pressure valve to open αpls again, and then close δ ₂ pls, δ ₂ =α+γ ₂ +η ₂ +200pls, where, γ ₂ is the opening of the low-pressure valve after the first reset adjustment, and η ₂ is the sixth preset step number. If the low-pressure valve in the valve box is still leaking after the second reset adjustment, control the low-pressure valve to open αpls again, and then close δ ₃ pls, δ ₃ =α+γ ₃ +η ₃ +200pls, where, γ ₃ is the opening of the low-pressure valve after the second reset adjustment, and η ₃ is the seventh preset step number. Among them, eta ₁ ≤ _{eta 2} ≤ eta ₃ , and α, γ ₁ , γ ₂ , γ ₃ , eta ₁ , eta ₂ and eta ₃ are all positive integers. A second reset operation is performed on the low-pressure valve within a second preset time, for example, within 8 hours, that is, a maximum of three reset adjustments are performed.

When the low-pressure valve in the valve box has a slight refrigerant leakage, it only needs to be reset and adjusted once to repair the low-pressure valve in the valve box. When the low-pressure valve in the valve box is in a serious refrigerant leakage state, the low-pressure valve in the valve box needs to be reset and adjusted twice to repair the low-pressure valve in the valve box. The low-pressure valve in the valve box is in a serious refrigerant leakage state. In the normal state, the low-pressure valve in the valve box needs to be reset and adjusted three times to repair the low-pressure valve in the valve box. Since the number of resets of the low-pressure valve in the valve box is limited, the electronic equipment depends on the refrigerant of the low-pressure valve in the valve box. Perform corresponding reset adjustment in case of leakage. When the low-pressure valve in the valve box is in a slight refrigerant leakage state, the low-pressure valve in the valve box can be repaired without resetting and adjusting it three times, thereby prolonging the life of the valve box. The service life of the low pressure valve.

As shown in FIG. 6 , an embodiment of the present disclosure provides a device 100 for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner, including a processor 14 and a memory 15 . Optionally, the device 100 may also include a communication interface (Communication Interface) 16 and a bus 17. Among them, the processor 14, the communication interface 16, and the memory 15 can communicate with each other through the bus 17. Communication interface 16 may be used for information transmission. The processor 14 can call logical instructions in the memory 15 to execute the method for detecting leakage of the valve box of the three-pipe simultaneous heating and cooling air conditioner in the above embodiment.

In addition, the above-mentioned logical instructions in the memory 15 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

As a storage medium, the memory 15 can be used to store software programs, computer executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 14 executes program instructions/modules stored in the memory 15 to execute functional applications and data processing, that is, to implement the method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner in the above embodiment.

The memory 15 may include a program storage area and a data storage area, where the program storage area may store an operating system and an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, etc. In addition, the memory 15 may include high-speed random access memory, and may also include non-volatile memory.

An embodiment of the present disclosure provides an electronic device, including the above-mentioned device for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner.

Optionally, the electronic equipment includes a three-pipe simultaneous heating and cooling air conditioner, computer or server, etc.

An embodiment of the present disclosure provides a computer program that, when executed by a computer, causes the computer to implement the above device for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner.

Embodiments of the present disclosure provide a computer program product. The computer program product includes computer instructions stored on a computer-readable storage medium. When the program instructions are executed by a computer, the computer implements the above-mentioned detection of three The valve box of the heating and cooling air conditioner is leaking in the pipeline.

The foregoing description and drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples represent only possible variations. Unless explicitly required, individual components and features are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. Furthermore, the words used in this application are used only to describe the embodiments and not to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. . Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed items. In addition, when used in this application, the term "comprise" and its variations "comprises" and/or "comprising" etc. refer to stated features, integers, steps, operations, elements, and/or The presence of a component does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groupings of these. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method or apparatus including the stated element. In this article, each embodiment may focus on its differences from other embodiments, and the same and similar parts among various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiment, then the relevant parts can be referred to the description of the method part.

Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The skilled person may use different methods to implement the described functionality for each specific application, but such implementations should not be considered to be beyond the scope of the disclosed embodiments. The skilled person can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more components for implementing the specified logical function(s). Executable instructions. In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two consecutive blocks may actually execute substantially in parallel, or they may sometimes execute in the reverse order, depending on the functionality involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, operations or steps corresponding to different blocks may also occur in a sequence different from that disclosed in the description, and sometimes there is no specific distinction between different operations or steps. order. For example, two consecutive operations or steps may actually be performed substantially in parallel, or they may sometimes be performed in reverse order, depending on the functionality involved. Each block in the block diagram and/or flowchart illustration, and combinations of blocks in the block diagram and/or flowchart illustration, may be implemented by special purpose hardware-based systems that perform the specified functions or actions, or may be implemented using special purpose hardware implemented in combination with computer instructions.

Claims

A method for detecting leakage in a valve box of a three-pipeline simultaneous cooling and heating air conditioner. The outdoor unit of the three-pipeline simultaneous cooling and heating air conditioner is connected to the air pipe of the indoor unit through the low-pressure air pipe and the high-pressure air pipe through the valve box. The valve box is used To achieve switching between high and low pressure refrigerants, the method is characterized in that the method includes:

Obtain the temperature of the low-pressure air pipe in the valve box;

According to the temperature of the low-pressure air pipe, it is determined whether refrigerant leakage occurs in the valve box.
The method according to claim 1, characterized in that a high-pressure valve is provided on the high-pressure air pipe in the valve box, and obtaining the temperature of the low-pressure air pipe in the valve box includes:

When the high-pressure valve is closed, the temperature of the low-pressure gas pipe in the valve box is obtained.
The method according to claim 2, characterized in that determining whether refrigerant leakage occurs in the valve box according to the temperature of the low-pressure air pipe includes:

Get the indoor ambient temperature;

When the difference between the temperature of the low-pressure air pipe and the indoor ambient temperature is greater than or equal to the first preset temperature and lasts for a first preset time, it is determined that refrigerant leakage occurs in the valve box.
The method according to claim 2, characterized in that determining whether refrigerant leakage occurs in the valve box according to the temperature of the low-pressure air pipe includes:

Obtain the temperature of the indoor unit air pipe;

When the difference between the temperature of the low-pressure air pipe and the temperature of the indoor unit air pipe is greater than or equal to the second preset temperature and lasts for a first preset time, it is determined that refrigerant leakage occurs in the valve box.
The method according to any one of claims 1 to 4, characterized in that a low-pressure valve is provided on the low-pressure air pipe in the valve box, and obtaining the temperature of the low-pressure air pipe includes:

When the low-pressure valve is closed, the temperature of the low-pressure air pipe in the valve box is obtained.
The method according to claim 5, characterized in that determining whether refrigerant leakage occurs in the valve box according to the temperature of the low-pressure air pipe includes:

Get the indoor ambient temperature;

When the difference between the temperature of the low-pressure air pipe and the indoor ambient temperature is greater than or equal to the third preset temperature and lasts for a first preset time, it is determined that refrigerant leakage occurs in the valve box.
The method according to claim 3 or 4, characterized in that after determining that refrigerant leakage occurs in the valve box, it further includes:

The high-pressure valve is controlled to reset according to the preset first reset operation.
The method according to claim 6, characterized in that after it is determined that the valve box leaks, it further includes:

The low-pressure valve is controlled to reset according to the preset second reset operation.
A device for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner, including a processor and a memory storing program instructions, characterized in that the processor is configured to execute, when running the program instructions, as follows: The method for detecting valve box leakage of a three-pipe simultaneous heating and cooling air conditioner according to any one of claims 1 to 8.
An electronic device, characterized by comprising the device for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner as claimed in claim 9.
A computer program, when the computer program is executed by a computer, causes the computer to implement the method for detecting leakage of a valve box of a three-pipe simultaneous heating and cooling air conditioner as described in any one of claims 1 to 8.
A computer program product. The computer program product includes computer instructions stored on a computer-readable storage medium. When the program instructions are executed by a computer, the computer implements the method described in any one of claims 1 to 8. Method for detecting valve box leakage of three-pipe simultaneous heating and cooling air conditioners.