CN117628636A - Methods, devices, air conditioners and storage media for detecting refrigerant leaks - Google Patents

Abstract

This application relates to the technical field of smart home appliances, and discloses a method for detecting refrigerant leakage, which is applied to an air conditioner. The air conditioner includes a refrigerant storage device in parallel with the refrigerant circulation circuit, which is controlled to be opened or closed, and the storage part is in a closed state. Refrigerant; the method includes: responding to the refrigerant leakage detection command, controlling the air conditioner to start pre-operation; obtaining the first concentration of the target substance at the air inlet of the air conditioner, and the second concentration of the target substance at the air outlet; according to the first concentration and the second concentration of the target substance at the air outlet. The second concentration determines whether refrigerant leakage occurs; among them, during the pre-operation of the air conditioner, the refrigerant storage device remains closed. This application determines whether the refrigerant leaks based on the concentration of the target substance. At this time, the refrigerant storage device stores part of the refrigerant. The amount of refrigerant in the refrigerant circulation circuit is reduced, and the amount of refrigerant that may leak is reduced, which is beneficial to improving the safety of the refrigerant leakage detection process. This application also discloses a device for detecting refrigerant leakage, an air conditioner and a storage medium.

Description

Methods, devices, air conditioners and storage media for detecting refrigerant leaks

Technical field

This application relates to the technical field of smart home appliances, for example, to a method, device, air conditioner and storage medium for detecting refrigerant leakage.

Background technique

The refrigerant in the air conditioner is an important part of the air conditioner to control the ambient temperature. With the continuous development of air conditioning technology, the types of refrigerants are also constantly changing. People are constantly looking for environmentally friendly, efficient and energy-saving refrigerants for air conditioners. Due to the high GWP (Global Warming Potential) of R410A (a mixture of difluoromethane and pentafluoroethane) refrigerant, it will be gradually phased out in the current context of the increasingly severe global greenhouse effect. Refrigerants such as R290 (propane) have become a current research hotspot due to their low pollution advantages and cost advantages of low charging volume. However, R290 refrigerant is a flammable and explosive refrigerant, and the safety hazard caused by leakage is more serious.

A method for refrigerant detection is disclosed in the related art, which includes: obtaining the current refrigerant quality m after the air conditioning system enters a stable operating state; reading the last detection time T', the last detected refrigerant quality m' and the indoor refrigerant Density rho', and obtain the current time T; obtain the refrigerant leakage amount Δm based on the current refrigerant mass m and the last detected refrigerant mass m'.

In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in related technologies:

When the relevant technology detects a leak, part of the refrigerant has already leaked, and the leaked refrigerant brings safety risks to users.

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, air conditioner and storage medium for detecting refrigerant leakage, so as to improve safety during the refrigerant leakage detection process.

In some embodiments, the method is applied to an air conditioner, the air conditioner includes a refrigerant storage device, the refrigerant storage device is connected in parallel with the refrigerant circulation circuit, is configured to be controlled open or closed, and stores part of the refrigerant in the closed state. ; The method includes: in response to the refrigerant leakage detection command, controlling the air conditioner to start pre-operation; obtaining the first concentration of the target substance at the air inlet of the air conditioner, and the second concentration of the target substance at the air outlet; according to the first The concentration and the second concentration determine whether refrigerant leakage occurs; wherein, during pre-operation of the air conditioner, the refrigerant storage device remains closed.

In some embodiments, the device includes a processor and a memory storing program instructions, and the processor is configured to perform the above-mentioned method for detecting refrigerant leakage when running the program instructions.

In some embodiments, the air conditioner includes: a refrigerant storage device, connected in parallel with the refrigerant circulation circuit, configured to be controlled open or closed, and store part of the refrigerant in the closed state; and, the above-mentioned device for detecting refrigerant leakage .

In some embodiments, the storage medium stores program instructions, and when the program instructions are run, the above-mentioned method for detecting refrigerant leakage is executed.

The methods, devices, air conditioners and storage media for detecting refrigerant leakage provided by embodiments of the present disclosure can achieve the following technical effects:

After receiving the refrigerant leakage detection command, the air conditioner is controlled to perform pre-operation. During the pre-operation process, it is determined whether the refrigerant is leaking based on the concentration of the target substance at the inlet and outlet of the air conditioner, and the refrigerant storage device is controlled to remain closed to always store part of the refrigerant. In this way, during the process of detecting refrigerant leakage, the amount of refrigerant in the refrigerant circulation circuit is relatively small, which reduces the amount of refrigerant that may leak, which is beneficial to improving the safety of the refrigerant leakage detection process.

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 an air conditioner provided by an embodiment of the present disclosure;

Figure 2 is a schematic diagram of a method for detecting refrigerant leakage provided by an embodiment of the present disclosure;

Figure 3 is a schematic diagram of another method for detecting refrigerant leakage provided by an embodiment of the present disclosure;

Figure 4 is a schematic diagram of another method for detecting refrigerant leakage provided by an embodiment of the present disclosure;

Figure 5 is a schematic diagram of another method for detecting refrigerant leakage provided by an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a device for detecting refrigerant leakage provided by an embodiment of the present disclosure.

Reference signs:

11: Compressor; 12: Four-way valve; 13: Outdoor heat exchanger; 14: Throttle device; 15: Outdoor air supply module; 16: Refrigerant storage device; 17: Third stop valve; 18: Fourth stop valve ; 21: Indoor heat exchanger; 22: Indoor air supply module; 160: Refrigerant storage body; 161: First stop valve; 162: Second stop valve; 163: One-way valve.

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 embodiments, the terminal device refers to an electronic device with a wireless connection function. The terminal device can communicate with the above smart home appliances by connecting to the Internet, or can directly communicate with the above smart home appliances through Bluetooth, wifi, etc. Communication connection. In some embodiments, the terminal device is, for example, a mobile device, a computer, or a vehicle-mounted device built into a floating vehicle, or any combination thereof. Mobile devices may include, for example, mobile phones, smart home devices, wearable devices, smart mobile devices, virtual reality devices, etc., or any combination thereof. Wearable devices may include, for example, smart watches, smart bracelets, pedometers, etc.

As shown in FIG. 1 , an embodiment of the present disclosure provides an air conditioner. The compressor 11, four-way valve 12, outdoor heat exchanger 13, throttling device 14, and indoor heat exchanger 21 in the air conditioner are connected in sequence through pipelines, and then returned to the compressor 11 to form a closed refrigerant circulation loop.

The air conditioner can be divided into two parts: an indoor unit and an outdoor unit. For example, the left side of the dotted line in Figure 1 is the outdoor unit part, and the right side is the indoor unit part. The outdoor unit includes a compressor 11, a four-way valve 12, an indoor heat exchanger 13, a throttling device 14 and an outdoor air supply module 15. The indoor unit includes an indoor heat exchanger 21 and an indoor air supply module 22.

The air conditioner also includes a refrigerant storage device 16 . The refrigerant storage device 16 is connected in parallel with the refrigerant circulation circuit and can be controlled to be opened or closed. When in the closed state, the refrigerant storage device 16 stores part of the refrigerant. Specifically, the refrigerant storage device 16 is provided in the outdoor unit part of the air conditioner. More specifically, the refrigerant storage device 16 is connected between the indoor heat exchanger 21 and the compressor 11 . In this way, when the refrigerant storage device is closed, it can be ensured that there is no refrigerant in the indoor unit, thereby preventing refrigerant from leaking into the indoor area and causing safety hazards.

The refrigerant storage device 16 includes a refrigerant storage body 160 , a first stop valve 161 and a second stop valve 162 . The refrigerant storage body 160 has a cavity capable of storing refrigerant. The first stop valve 161 is provided at the inlet end of the refrigerant storage device 16 , and the second stop valve 162 is provided at the outlet end of the refrigerant storage device 16 . Among them, the above-mentioned inlet end and outlet end are based on the flow direction of the refrigerant during refrigeration operation as a reference. When the first stop valve 161 is opened, the refrigerant can enter the refrigerant storage body 160 from the refrigerant circulation circuit. With the second stop valve 162 open, the refrigerant may flow out of the refrigerant storage body 160 .

The refrigerant storage device 16 also includes a one-way valve 163 disposed at the inlet of the refrigerant storage device 16 . More specifically, the first stop valve 161 is provided between the refrigerant storage body 160 . In this way, refrigerant backflow can be avoided.

The refrigerant storage device 16 is in a closed state, that is, both the first stop valve 161 and the second stop valve 162 are in a closed state. At this time, even if the air conditioner is in operation, the refrigerant in the refrigerant storage device 16 will not enter the refrigerant circulation circuit.

The air conditioner also includes a third stop valve 17 and a fourth stop valve 18, which are respectively disposed before and after the indoor heat exchanger 15. Specifically, the third stop valve 17 is provided between the throttling device 14 and the indoor heat exchanger 21 . The fourth stop valve 18 is provided between the indoor heat exchanger 21 and the compressor 11 . In this way, the direction of the refrigerant in the indoor heat exchanger can be controlled through the passage and disconnection of the third stop valve and the fourth stop valve. Specifically, in the cooling mode, the third stop valve is controlled to be open and the fourth stop valve is controlled to pass, so that the refrigerant no longer flows into the indoor side. The refrigerant in the indoor heat exchanger flows to the compressor or outdoor heat exchanger. In the heating mode, the third stop valve passage and the fourth stop valve are controlled to be disconnected so that the refrigerant no longer flows into the room. The refrigerant in the indoor heat exchanger reaches the outdoor heat exchanger through the throttling device. In this way, the direction of the refrigerant in the indoor heat exchanger can be controlled through the opening and closing of the third stop valve and the stop valve.

When the air conditioner is operating normally, both the third stop valve 17 and the fourth stop valve 18 are in the passage state to ensure normal operation of the refrigerant circulation process.

As shown in FIG. 2 , an embodiment of the present disclosure provides a method for detecting refrigerant leakage, including:

S201, the processor responds to the refrigerant leakage detection command and controls the air conditioner to start pre-operation. Wherein, during pre-operation of the air conditioner, the refrigerant storage device remains closed.

That is, the third stop valve and the fourth stop valve passage are controlled, and other devices in the air conditioner are operated. And control the first stop valve and the second stop valve to close. During the pre-operation process of the air conditioner, ensure that the refrigerant in the refrigerant storage device does not enter the refrigerant circulation circuit.

S202. The processor obtains the first concentration of the target substance at the air inlet of the air conditioner and the second concentration of the target substance at the air outlet.

Here, the first concentration and the second concentration are respectively detected by sensors installed at the air inlet and air outlet of the air conditioner. The target substance can be a component of the refrigerant, or it can be an element contained in the refrigerant. The element can be common to air and refrigerant. The specific types of the first sensor and the second sensor can be determined according to the target substance.

S203: The processor determines whether refrigerant leakage occurs based on the first concentration and the second concentration.

Using the method for detecting refrigerant leakage provided by embodiments of the present disclosure, after receiving the refrigerant leakage detection instruction, the air conditioner is controlled to perform pre-operation. During the pre-operation process, it is determined whether the refrigerant is leaking based on the concentration of the target substance at the inlet and outlet of the air conditioner, and the refrigerant storage device is controlled to remain closed to always store part of the refrigerant. In this way, during the process of detecting refrigerant leakage, the amount of refrigerant in the refrigerant circulation circuit is relatively small, which reduces the amount of refrigerant that may leak, which is beneficial to improving the safety of the refrigerant leakage detection process.

Optionally, the refrigerant leakage detection instruction may be directly input by the user. Specifically, the user directly sends a refrigerant leakage detection instruction to the processor of the air conditioner through a remote control or a smart terminal such as a smartphone. In this way, it can be ensured that refrigerant leak detection is adapted to the actual needs of users.

Optionally, the refrigerant leakage detection command may be a start command of the air conditioner. That is, refrigerant leakage detection is run every time the air conditioner is turned on. In this way, refrigerant leakage can be detected in time, effectively avoiding missed detection.

Optionally, the processor controls the air conditioner to start pre-operation to control the air conditioner to run at a low frequency. In this way, a smaller amount of refrigerant in the refrigerant circulation circuit can keep the air conditioner in operation.

Optionally, during the pre-operation of the air conditioner, the amount of refrigerant in the refrigerant circulation circuit is 30% to 50% of the total amount of refrigerant. In this way, it is possible to prevent the refrigerant from being unable to maintain operating status due to too little refrigerant, and to avoid an increase in the amount of refrigerant that may leak due to too much refrigerant.

Optionally, the above-mentioned refrigerant leakage detection process is performed within a preset detection time. Within a preset time, refrigerant leakage detection can be performed periodically, that is, the processor periodically obtains the first concentration of the target substance at the air inlet of the air conditioner, and the second concentration of the target substance at the air outlet. Or, the processor periodically determines whether refrigerant leakage occurs. In this way, multiple judgments will help improve the accuracy of the detection results.

As shown in FIG. 3 , an embodiment of the present disclosure provides another method for detecting refrigerant leakage, including:

S301: The processor responds to the refrigerant leakage detection command and controls the air conditioner to start pre-operation. Wherein, during pre-operation of the air conditioner, the refrigerant storage device remains closed.

S302: The processor obtains the first concentration of the target substance at the air inlet of the air conditioner and the second concentration of the target substance at the air outlet.

S303: The processor compares the relationship between the first concentration and the second concentration, and determines whether the second concentration is greater than the first concentration.

S304, if the second concentration is less than or equal to the first concentration, the processor determines that the refrigerant has not leaked.

S305, if the second concentration is greater than the first concentration, the processor determines that the refrigerant is leaking.

S306: When the second concentration is less than the first preset value and the first concentration is stable, it is determined that the refrigerant is slightly leaking, and the air conditioner is controlled to execute the first operation strategy; wherein the first operation strategy includes: increasing the indoor fan speed.

The second concentration is less than the first preset value, which means that the concentration of the target substance at the air outlet of the air conditioner is less than the first preset value. Although the refrigerant has leaked at this time, the degree of leakage is relatively low. At the same time, the first concentration at the air inlet of the air conditioner remains stable, indicating that the refrigerant concentration in the indoor air has not changed significantly. There is almost no harm to the human body, and the safety hazards are also small. At this time, the air conditioner is controlled to increase the speed of the indoor fan to speed up the diffusion of refrigerant and avoid safety hazards caused by the concentration of refrigerant.

S307: When both the first concentration and the second concentration are greater than or equal to the first preset value and less than the second preset value, and the first concentration increases, it is determined that the refrigerant is leaking moderately, and the air conditioner is controlled to execute the second preset value. Run the strategy. Wherein, the second operation strategy includes: turning off the air conditioner.

When the second concentration is greater than or equal to the first preset value and less than the second preset value, it indicates that the refrigerant has leaked to a certain extent. At this time, if an increase in refrigerant concentration is detected at the air inlet, it means that the leaked refrigerant has affected the indoor air. At this time, the air conditioner needs to be turned off immediately to avoid further leakage of refrigerant.

Here, the specific operation of turning off the air conditioner is related to the current operating conditions. According to the operating mode of the air conditioner, at least one stop valve switch is controlled, and the operating parameters of the indoor fan and outdoor equipment of the air conditioner are simultaneously adjusted to discharge the refrigerant in the indoor heat exchanger to the compressor of the outdoor unit part. During this process, the stop valves before and after the indoor heat exchanger are closed.

Specifically, when the air conditioner is in cooling mode, the third stop valve is controlled to be open and the fourth stop valve is controlled to be open. The outdoor air supply module and compressor continue to run, and the indoor air supply module switches to low-flow operation. At this time, the refrigerant in the outdoor unit cannot enter the indoor unit. The refrigerant in the indoor heat exchanger continues to flow in the original direction, reaches the outdoor unit part, and enters the compressor or outdoor heat exchanger. After running for the first specified time, the outdoor air supply module, compressor and indoor air supply module all stop. In this way, there is no refrigerant in the indoor unit part, and refrigerant leakage in the indoor unit part can be avoided.

When the air conditioner is in heating mode, the passage of the third stop valve is controlled and the fourth stop valve is disconnected. The outdoor air supply module stops running, the compressor operates normally, and the indoor air supply module switches to low-wind operation. At this time, the refrigerant in the outdoor unit no longer flows to the indoor unit. The refrigerant in the indoor heat exchanger continues to flow in the original direction and reaches the compressor and/or outdoor heat exchanger in the outdoor unit. After running for the second specified time, the outdoor air supply module, compressor and indoor air supply module all stop. In this way, there is no refrigerant in the indoor unit, which can prevent refrigerant leakage from causing safety hazards in the indoor unit.

In addition, a specific determination can be made on the situation where the first concentration increases by setting a threshold value. That is, after setting the threshold, if the first concentration is greater than or equal to the threshold, it is determined that the first concentration has increased. During the comparison process, the maximum value of the detected first concentration is used as the basis for judgment. For example, when the current refrigerant of the air conditioner is R290 refrigerant, the threshold may be 2.1%×6%. Among them, 2.1% is the lower explosion limit concentration of R290 refrigerant. If the concentration exceeds this concentration, an explosion may occur. 6% is a correction coefficient, which is helpful to balance the error between the detected value and the actual leakage situation.

S308: If either of the first concentration and the second concentration is greater than or equal to the second preset value, determine that the refrigerant leaks severely, and control the air conditioner to execute the third operating strategy. Among them, the third operation strategy includes: turning off the air conditioner and maintaining the off state.

If any one of the first concentration and the second concentration is greater than or equal to the second preset value, it indicates that the degree of refrigerant leakage is relatively serious. This will pose a threat to the user's health and have serious security risks. At this time, turn off the air conditioner to avoid continued leakage of refrigerant. After turning off the air conditioner, the power-on command will no longer be executed to avoid continued leakage of refrigerant. Different from the operation with moderate refrigerant leakage, during the process of turning off the air conditioner here, the indoor air supply module runs at high speed. This will help disperse the refrigerant that has leaked indoors faster and avoid excessive concentration of refrigerant in some areas caused by accumulation of refrigerant.

Optionally, the first preset value is k ₁ ×(1-N)×t ₁ .

Among them, k ₁ is the first refrigerant correlation coefficient, and the value of k ₁ is related to the type of refrigerant. When the current refrigerant of the air conditioner is R290 refrigerant, the preferred value of k ₁ is 1%. This is because short-term exposure to refrigerant with a content of 1% will not cause discomfort to the body and will have less impact on users. N is the volume ratio of the refrigerant in the refrigerant storage device to the total amount of refrigerant. The more refrigerant stored in the refrigerant storage device, that is, the larger N, the smaller the amount of refrigerant in the refrigerant circulation circuit. Correspondingly, reducing the first preset value is conducive to reflecting the degree of refrigerant leakage more accurately and improving the accuracy of refrigerant leakage detection. t ₁ is the first correction coefficient to balance the error caused by reaction time. For example, it can be 0.1.

Optionally, the first operation strategy also includes: the processor controls the air conditioner to operate at high frequency. In this way, it can prevent the pressure in the refrigerant circulation circuit from increasing, causing the leakage point to become larger and causing the refrigerant leakage to become more serious.

Optionally, the first operation strategy also includes: the processor controls the opening of the two-way fresh air function of the air conditioner. In this way, fresh air is injected into the room and dirty air is discharged to the outside.

Optionally, the second preset value is k ₂ ×t ₂ .

Among them, k ₂ is the second refrigerant correlation coefficient, which is related to the type of refrigerant. When the refrigerant in the current air conditioner is R290, _k2 can be taken as 2.1%. 2.1% is the lower explosion limit of R290. If the indoor R290 concentration exceeds this value, an explosion may occur. t ₂ is the second correction coefficient to balance the error caused by reaction time. For example, it can be 0.75.

Optionally, the second running strategy also includes: the processor sends the first prompt information. The first prompt information may be a prompt sound, or may be a prompt message sent to a smart terminal such as a user's smartphone or smart computer, or may be linked with other terminal devices to prompt the user. In this way, users can learn the refrigerant detection results in time and take relevant measures in a timely manner.

Optionally, the second operating strategy also includes: the processor controls the two-way fresh air function of the air conditioner to turn on. In this way, it is conducive to injecting fresh air into the room and discharging dirty air to the outside to avoid adverse effects on users.

Optionally, the third operation strategy also includes: the processor sends a second prompt message. The second prompt information may be a prompt sound, or may be a prompt message sent to a smart terminal such as a user's smartphone or smart computer, or may be linked with other terminal devices to prompt the user. In actual application, the second prompt information should be different from the first prompt information. In this way, it helps the user to directly understand the current degree of refrigerant leakage based on the prompt information so as to perform different operations.

Optionally, after the processor controls the air conditioner to execute the third operating strategy, the method further includes: after receiving a qualified maintenance instruction, the processor controls the air conditioner to start. The maintenance qualified signal is set by the maintenance personnel. In this way, it is ensured that the air conditioner is turned on only after the repair has been qualified, to avoid starting the air conditioner if the refrigerant leakage is not resolved, causing the refrigerant to continue to leak, causing safety hazards.

Optionally, after the processor controls the air conditioner to be turned on, it also includes: the processor controls the indoor fresh air function and the indoor exhaust function to start. In the case of linkage control between the air conditioner and other indoor air exchange equipment, it also includes: the processor controls the opening of the indoor air exchange equipment. In this way, it is helpful to quickly disperse the leaked refrigerant in the indoor air, or the leaked refrigerant remaining in the indoor unit of the air conditioner, thereby avoiding user discomfort and avoiding safety hazards.

As shown in FIG. 4 , an embodiment of the present disclosure provides another method for detecting refrigerant leakage, including:

S401: The processor responds to the refrigerant leakage detection command and controls the air conditioner to start pre-operation. Wherein, during pre-operation of the air conditioner, the refrigerant storage device remains closed.

S402: The processor obtains the first concentration of the target substance at the air inlet of the air conditioner and the second concentration of the target substance at the air outlet.

S403: The processor determines whether refrigerant leakage occurs based on the first concentration and the second concentration.

S404, when the processor determines that the refrigerant has not leaked, the processor controls the refrigerant storage device to open until all the refrigerant in the refrigerant storage device enters the refrigerant circulation circuit.

When there is no refrigerant leakage, turn off the pre-operation mode of the air conditioner and control the normal operation of the air conditioner. Normal operation means running according to the working conditions and target parameters currently set by the user.

As shown in FIG. 5 , an embodiment of the present disclosure provides another method for detecting refrigerant leakage, including:

S501: The processor responds to the refrigerant leakage detection command and controls the air conditioner to start pre-operation. Wherein, during pre-operation of the air conditioner, the refrigerant storage device remains closed.

S502: The processor obtains the first concentration of the target substance at the air inlet of the air conditioner and the second concentration of the target substance at the air outlet.

S503: The processor compares the relationship between the first concentration and the second concentration, and determines whether the second concentration is greater than the first concentration.

S504, if the second concentration is less than or equal to the first concentration, the processor determines that the refrigerant has not leaked.

S505, if the second concentration is greater than the first concentration, the processor determines that the refrigerant is leaking.

After the processor determines that the refrigerant leaks, S506, when the second concentration is less than the first preset value and the first concentration is stable, it determines that the refrigerant leaks slightly, and controls the air conditioner to execute the first operation strategy; wherein, the first operation strategy Including: increasing indoor fan speed.

S507: When both the first concentration and the second concentration are greater than or equal to the first preset value and less than the second preset value, and the first concentration increases, it is determined that the refrigerant is leaking moderately, and the air conditioner is controlled to execute the second preset value. Run the strategy. Wherein, the second operation strategy includes: turning off the air conditioner.

S508: If any one of the first concentration and the second concentration is greater than or equal to the second preset value, it is determined that the refrigerant leaks severely, and the air conditioner is controlled to execute the third operating strategy. Among them, the third operation strategy includes: turning off the air conditioner and maintaining the off state.

After controlling the air conditioner to turn off the air conditioner and executing the third operation strategy, S509 is executed. After receiving the maintenance qualification instruction, the processor controls the air conditioner to turn on.

After the processor determines that the refrigerant has not leaked, S510 is executed, and the processor controls the refrigerant storage device to open until all the refrigerant in the refrigerant storage device enters the refrigerant circulation circuit.

As shown in FIG. 6 , an embodiment of the present disclosure provides a device for detecting refrigerant leakage, including a processor 60 and a memory 61 . Optionally, the device may also include a communication interface (CommunicationInterface) 62 and a bus 63. Among them, the processor 60 , the communication interface 62 , and the memory 61 can communicate with each other through the bus 63 . Communication interface 62 may be used for information transmission. The processor 60 may call logical instructions in the memory 61 to execute the method for detecting refrigerant leakage in the above embodiment.

In addition, the above-mentioned logical instructions in the memory 61 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 61 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 60 executes program instructions/modules stored in the memory 61 to execute functional applications and data processing, that is, to implement the method for detecting refrigerant leakage in the above embodiment.

The memory 61 may include a stored program area and a stored data area, where the stored program area may store an operating system and at least one application program required for a function; the stored data area may store data created according to the use of the terminal device, etc. In addition, the memory 61 may include a high-speed random access memory, and may also include a non-volatile memory.

An embodiment of the present disclosure provides an air conditioner, including the above-mentioned device for detecting refrigerant leakage.

Embodiments of the present disclosure provide a storage medium that stores computer-executable instructions, and the computer-executable instructions are configured to execute the above method for detecting refrigerant leakage.

The above-mentioned storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network equipment, etc.) to perform all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage media can be non-transitory storage media, including: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc. A medium that can store program code or a temporary storage medium.

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.

In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units may only be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined. Either it can be integrated into another system, or some features can be ignored, or not implemented. In addition, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

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 (10)

1. The method for detecting the leakage of the refrigerant is applied to an air conditioner and is characterized by comprising a refrigerant storage device, wherein the refrigerant storage device is connected with a refrigerant circulation loop in parallel and is configured to be controlled to be opened or closed, and part of the refrigerant is stored in the closed state; the method comprises the following steps:

responding to a refrigerant leakage detection instruction, and controlling the air conditioner to start pre-operation;

obtaining a first concentration of a target substance at an air inlet of an air conditioner and a second concentration of the target substance at an air outlet of the air conditioner;

judging whether refrigerant leakage occurs according to the first concentration and the second concentration;

wherein, when the air conditioner is pre-operated, the refrigerant storage device is kept in a closed state.

2. The method of claim 1, wherein said determining whether refrigerant leakage occurs based on said first concentration and said second concentration comprises:

comparing the magnitude relationship of the first concentration and the second concentration;

if the second concentration is greater than the first concentration, judging that the refrigerant leaks;

and if the second concentration is smaller than or equal to the first concentration, judging that the refrigerant is not leaked.

3. The method of claim 2, wherein after said determining that the refrigerant is leaking, further comprising:

judging that the refrigerant slightly leaks under the condition that the second concentration is smaller than a first preset value and the first concentration is stable, and controlling the air conditioner to execute a first operation strategy;

wherein the first operation strategy comprises: the rotating speed of the indoor fan is improved.

4. The method of claim 3, further comprising, after said determining refrigerant leakage:

judging medium leakage of the refrigerant and controlling the air conditioner to execute a second operation strategy when the first concentration and the second concentration are both larger than or equal to the first preset value and smaller than the second preset value and the first concentration is increased;

wherein the second operation strategy comprises: the air conditioner is turned off.

5. The method of claim 4, further comprising, after said determining refrigerant leakage:

judging that the refrigerant is seriously leaked under the condition that any concentration of the first concentration and the second concentration is larger than or equal to the second preset value, and controlling the air conditioner to execute a third operation strategy;

wherein the third operation strategy comprises: the air conditioner is turned off and the off state is maintained.

6. The method of claim 5, after the controlling the air conditioner to execute the third operation policy, further comprising:

and after receiving the maintenance qualification instruction, controlling the air conditioner to start.

7. The method according to any one of claims 1 to 6, wherein after the judging whether the refrigerant leakage occurs or not based on the first concentration and the second concentration, further comprising:

and under the condition that the refrigerant is not leaked, controlling the refrigerant storage device to be opened until all the refrigerant in the refrigerant storage device enters the refrigerant circulation loop.

8. An apparatus for detecting refrigerant leakage comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for detecting refrigerant leakage according to any one of claims 1 to 7 when the program instructions are run.

9. An air conditioner, comprising:

the refrigerant storage device is connected with the refrigerant circulation loop in parallel and is configured to be controlled to be opened or closed, and part of refrigerant is stored in the closed state; and, a step of, in the first embodiment,

the apparatus for detecting refrigerant leakage as recited in claim 8.

10. A storage medium storing program instructions which, when executed, perform the method for detecting refrigerant leaks of any one of claims 1 to 7.