Refrigerant leakage monitoring method and device, air conditioner and storage medium

Abstract

The invention discloses a refrigerant leakage monitoring method and device, an air conditioner and a storage medium. The refrigerant leakage monitoring method comprises the steps that the initial average refrigerant concentration is determined; the initial average refrigerant concentration is the average value of the initial refrigerant concentration of the first port, the initial refrigerant concentration of the second port, the initial refrigerant concentration of the third port and the initial refrigerant concentration of the fourth port; determining a change model of a concentration difference value between the refrigerant concentration of each port and the initial average refrigerant concentration, and determining whether refrigerant leakage occurs in each port according to the change model of the concentration difference value of each port; according to the invention, whether refrigerant leakage occurs at each port can be determined according to the change model of the concentration difference value of each port, the leakage condition of each port can be accurately determined, and the accuracy of refrigerant leakage monitoring is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to a refrigerant leakage monitoring method, device, air conditioner and storage medium. Background Art

[0002] An air conditioner is a device that directly provides processed air to a room or other enclosed area, and can adjust the indoor temperature, humidity, cleanliness, and air flow speed (freshness). Currently, the air conditioners on the market are roughly divided into integrated air conditioners and split air conditioners. Split air conditioners usually include an indoor unit and an outdoor unit. The indoor unit and the outdoor unit are connected by a refrigerant input pipe and a refrigerant output pipe to achieve refrigerant circulation between the outdoor unit and the indoor unit.

[0003] However, due to factors such as installation level and aging of structural parts, the refrigerant of split air conditioners is prone to leak from the inlet and outlet of the outdoor unit and the inlet and outlet of the indoor unit. Since some leakage points are not easy to be found during vacuum extraction, the refrigerant is reduced, the cooling and heating capacity is reduced, and even safety problems may occur. Summary of the invention

[0004] The main purpose of the embodiments of the present invention is to provide a refrigerant leakage monitoring method, device, air conditioner and storage medium, aiming to improve the technical problem of inaccurate refrigerant leakage monitoring in the prior art.

[0005] An embodiment of the present invention provides a refrigerant leakage monitoring method for monitoring refrigerant leakage of an air conditioner, the air conditioner comprising an outdoor unit, an indoor unit, a first connecting pipe and a second connecting pipe, the first connecting pipe having a first port and a second port, the second connecting pipe having a third port and a fourth port, the first port being connected to an inlet of the outdoor unit, the second port being connected to an outlet of the indoor unit, the third port being connected to the outlet of the outdoor unit, and the fourth port being connected to an inlet of the indoor unit, the refrigerant leakage monitoring method comprising:

[0006] Determine an initial average refrigerant concentration, where the initial average refrigerant concentration is an average of an initial refrigerant concentration of the first port, an initial refrigerant concentration of the second port, an initial refrigerant concentration of the third port, and an initial refrigerant concentration of the fourth port;

[0007] A variation model of a concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration is determined, and whether a refrigerant leakage occurs in each port is determined according to the variation model of the concentration difference of each port.

[0008] In some embodiments of the present invention, after determining that a refrigerant leak occurs at any port, the refrigerant leakage monitoring method further includes:

[0009] Determine a change rate of the concentration difference at the port where the refrigerant leakage occurs within a first time period;

[0010] The leakage level of the port where the refrigerant leakage occurs is determined according to the change rate of the concentration difference.

[0011] In some embodiments of the present invention, determining the change rate of the concentration difference at the port where the refrigerant leakage occurs within the first time period includes:

[0012] The rate of change of the refrigerant concentration difference is determined according to a change model of the difference between the refrigerant concentration of the port where the refrigerant leakage occurs and the initial average refrigerant concentration within the first period of time.

[0013] In some embodiments of the present invention, determining the leakage level of the port where the refrigerant leakage occurs according to the change rate of the concentration difference includes:

[0014] determining whether the rate of change is greater than a first rate of change;

[0015] When it is determined that the change rate is greater than or equal to the first change rate, the leakage level is determined to be a medium leakage or above, and the air conditioner is controlled to alarm;

[0016] When it is determined that the change rate is less than the first change rate, the leakage level is determined to be a slight leakage.

[0017] In some embodiments of the present invention, when the leakage level is determined to be a slight leakage, the refrigerant leakage monitoring method further includes:

[0018] Whether to supplement refrigerant to the air conditioner is determined according to the difference between the refrigerant concentration of the port where the refrigerant leakage occurs and the initial average refrigerant concentration.

[0019] In some embodiments of the present invention, determining whether refrigerant leakage occurs at each port according to a change model of the concentration difference at each port includes:

[0020] Determining whether the change model conforms to a preset change model;

[0021] If the change model conforms to the preset change model, it is determined that no refrigerant leakage occurs at the corresponding port;

[0022] If the change model does not conform to the preset change model, it is determined that a refrigerant leak occurs at the corresponding port.

[0023] In some embodiments of the present invention, the variation model of determining the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration includes:

[0024] A variation model of the concentration difference is determined according to the concentration difference of each port at at least two different time points.

[0025] In some embodiments of the present invention, a refrigerant leakage monitoring device is also provided, comprising:

[0026] An acquisition module, used to acquire an initial average refrigerant concentration, the acquisition module is further used to acquire a real-time refrigerant concentration of the first port, a real-time refrigerant concentration of the second port, a real-time refrigerant concentration of the third port, and a real-time refrigerant concentration of the fourth port, the acquisition module is further used to acquire a change model of a concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration;

[0027] The judgment module is used to determine whether refrigerant leakage occurs at each port according to a change model of the concentration difference at each port.

[0028] In some embodiments of the present invention, an air conditioner is also provided, which includes an outdoor unit, an indoor unit, a first connecting pipe, a second connecting pipe, a memory and a processor, the first connecting pipe has a first port and a second port, the second connecting pipe has a third port and a fourth port, the first port is connected to the inlet of the outdoor unit, the second port is connected to the outlet of the indoor unit, the third port is connected to the outlet of the outdoor unit, and the fourth port is connected to the inlet of the indoor unit, the memory stores a computer program, and the processor is used to run the computer program in the memory to execute the steps in the refrigerant leakage monitoring method described above.

[0029] In some embodiments of the present invention, a storage medium is further provided, wherein the storage medium stores a computer program, and the computer program is loaded and executed by a processor to execute the steps in the above-mentioned refrigerant leakage monitoring method.

[0030] Embodiments of the present invention provide a refrigerant leakage monitoring method, device, air conditioner and storage medium. The refrigerant leakage monitoring method is used to monitor refrigerant leakage at the leakage-prone position of the connecting pipe between the outdoor unit and the indoor unit of the air conditioner. By determining the initial average refrigerant concentration and the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration, and then determining whether refrigerant leakage occurs at each port based on the change model of the concentration difference of each port, the leakage situation of each port can be accurately determined, thereby improving the accuracy of refrigerant leakage monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of a flow chart of a refrigerant leakage monitoring method according to an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a refrigerant leakage monitoring device according to an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the structure of an air conditioner according to an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the structure of an outdoor unit of an air conditioner according to an embodiment of the present invention;

[0036] Figure 5 The figure is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present invention.

[0037] Attached figures: 10, refrigerant leakage monitoring device; 100, acquisition module; 200, judgment module; 300, control module; 400, outdoor unit; 410, first connecting pipe; 420, stop valve; 500, indoor heat exchanger; 510, second connecting pipe; 601, processor; 602, memory; 603, power supply; 604, input unit. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] like Figure 1-Figure 5 As shown, the present invention provides a refrigerant leakage monitoring method for monitoring the refrigerant leakage of an air conditioner, the air conditioner comprising an outdoor unit 400, an indoor unit, a first connecting pipe 410 and a second connecting pipe 510, the first connecting pipe 410 having a first port and a second port, the second connecting pipe 510 having a third port and a fourth port, the first port being connected to the inlet of the outdoor unit 400, the second port being connected to the outlet of the indoor unit, the third port being connected to the outlet of the outdoor unit 400, and the fourth port being connected to the inlet of the indoor unit, the refrigerant leakage monitoring method comprising:

[0043] S100, determining an initial average refrigerant concentration, where the initial average refrigerant concentration is an average of an initial refrigerant concentration of the first port, an initial refrigerant concentration of the second port, an initial refrigerant concentration of the third port, and an initial refrigerant concentration of the fourth port.

[0044] The initial average refrigerant concentration is generally a concentration value obtained by dividing the sum of the refrigerant concentration at the first port, the refrigerant concentration at the second port, the refrigerant concentration at the third port, and the refrigerant concentration at the fourth port at the same time by the number of ports.

[0045] The initial average refrigerant concentration is generally calculated based on the refrigerant concentration at the first port, the refrigerant concentration at the second port, the refrigerant concentration at the third port, and the refrigerant concentration at the fourth port when the air conditioner is turned on.

[0046] S200, determining a variation model of the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration, and determining whether refrigerant leakage occurs in each port according to the variation model of the concentration difference of each port.

[0047] Among them, the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration is the value obtained by subtracting the refrigerant concentration of each port from the initial average refrigerant concentration. For example, for the first port, the concentration difference between the refrigerant concentration at two different time points and the initial average refrigerant concentration can be calculated, such as obtaining the first difference at the first time point and the second difference at the second time point along the time sequence, and the change model of the concentration difference of the refrigerant concentration of the corresponding port from the initial time point to the second time point can be determined based on the first difference and the second difference, and then it can be determined whether the corresponding port has a refrigerant leak based on the concentration difference change model.

[0048] It can be understood that the refrigerant leakage monitoring method is used to monitor refrigerant leakage at the leakage-prone locations of the connecting pipe between the outdoor unit 400 and the indoor unit of the air conditioner. By determining the initial average refrigerant concentration and the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration, and then determining whether refrigerant leakage occurs at each port based on the change model of the concentration difference of each port, the leakage situation of each port can be accurately determined, thereby improving the accuracy of refrigerant leakage monitoring.

[0049] In some embodiments, after determining that any port has a leak, the refrigerant leakage monitoring method further includes:

[0050] S300, determining a change rate of a concentration difference value at a port where refrigerant leakage occurs within a first time period.

[0051] Among them, if it is determined that refrigerant leakage occurs only at the first port, then only the refrigerant concentration change rate of the first port is determined; if it is determined that refrigerant leakage occurs at both the first port and the second port, then the refrigerant concentration change rates of the first port and the second port are determined, that is, the refrigerant concentration change rates of the locations where the refrigerant leakage occurs are determined respectively.

[0052] S400, determining the leakage level of the port where the refrigerant leakage occurs according to the change rate of the concentration difference.

[0053] Among them, the change rate of the concentration difference can reflect the leakage rate of the refrigerant, so that the leakage level is judged according to the leakage rate. The faster the leakage rate, the higher the leakage level. Generally, the leakage level includes light leakage, moderate leakage and heavy leakage.

[0054] In some embodiments, S300, determining the change rate of the concentration difference of the port where the refrigerant leakage occurs within a first time period includes:

[0055] The rate of change of the refrigerant concentration difference is determined according to a change model of the difference between the refrigerant concentration of the port where the refrigerant leakage occurs and the initial average refrigerant concentration within the first period of time.

[0056] Among them, the first time length generally includes multiple first unit time lengths. From the starting time point to the end time point of the first time length, the difference between the refrigerant concentration at the refrigerant leakage location at each first unit time length end point and the initial average refrigerant concentration is obtained, and a curve graph of the difference and time change is obtained based on the multiple differences and the first time length. The slope of the curve of the difference and time change curve at the end point of the first time length is obtained. The slope is the rate of change of the refrigerant concentration difference at the end point of the first time length, that is, the refrigerant leakage rate at the refrigerant leakage location.

[0057] Among them, the formula relationship between the difference and time can be obtained by fitting the multiple difference values ​​and the first time length, and then the formula can be derived to determine the refrigerant concentration change rate at the corresponding time point.

[0058] In some embodiments, S400, determining the leakage level of the port where the refrigerant leakage occurs according to the change rate of the concentration difference includes:

[0059] It is determined whether the rate of change is greater than a first rate of change.

[0060] The first change rate is preset data pre-stored in the controller of the air conditioner, which generally represents the boundary between light leakage and moderate leakage.

[0061] When it is determined that the change rate is greater than or equal to the first change rate, the leakage level is determined to be a moderate leakage or above, and the air conditioner is controlled to alarm.

[0062] When it is determined that the change rate is less than the first change rate, the leakage level is determined to be a slight leakage.

[0063] When the leakage level is determined to be moderate or above, the leakage location needs to be processed, so the air conditioner needs to be controlled to alarm, and the alarm here is generally alarmed by a buzzer alarm. Generally, when the refrigerant concentration is determined to be a slight leakage, an indicator light can be displayed and a text message can be sent to the user's mobile phone to remind.

[0064] In some embodiments, when the leakage level is determined to be a slight leakage, the refrigerant leakage monitoring method further includes:

[0065] Whether to supplement refrigerant to the air conditioner is determined according to the difference between the refrigerant concentration of the port where the refrigerant leakage occurs and the initial average refrigerant concentration.

[0066] Among them, the refrigerant concentration here is the refrigerant concentration of the port at the current moment. By determining the difference between the refrigerant concentration of the port at the current moment and the initial average concentration, the refrigerant leakage amount can be determined, and then whether the leakage amount is within an acceptable range can be determined. If the leakage amount is not within an acceptable range, refrigerant needs to be supplemented.

[0067] Among them, if the difference between the current refrigerant concentration and the initial average refrigerant concentration is greater than or equal to the preset difference, it is determined that the air conditioner needs to replenish refrigerant; if the difference between the current refrigerant concentration and the initial average refrigerant concentration is less than the preset difference, it is determined that the air conditioner does not need to replenish refrigerant.

[0068] In some embodiments, S200, determining whether refrigerant leakage occurs at each port according to a change model of the concentration difference at each port includes:

[0069] Determine whether the change model complies with the preset change model.

[0070] Among them, the preset change model is a change model of the concentration difference based on the case where no leakage occurs, that is, the actual change model of the concentration difference is compared with the preset change model. If the actual change model is within the range of the preset change model, it is determined that the change model conforms to the preset change model; if the actual change model is not within the range of the preset change model, it is determined that the change model does not conform to the preset change model.

[0071] Among them, the preset change model is generally a curve model based on the change of concentration difference over time.

[0072] If the change model conforms to the preset change model, it is determined that no refrigerant leakage occurs at the corresponding port.

[0073] If the change model does not conform to the preset change model, it is determined that a refrigerant leak occurs at the corresponding port.

[0074] Specifically, the method for determining whether the change model conforms to the preset change model is as follows:

[0075] The actual change model of the concentration difference changing with time is compared with the preset change model. If at least one curve segment within the set time length in the actual change model is located above the curve of the preset change model of the corresponding time length, it is determined that the actual change model does not conform to the preset change model. If the curves of the actual change model are all below the curves of the preset change model, or part of the curve of the actual change model is below the curve of the preset change model and partly overlaps with the curve of the preset change model, it is determined that the actual change model conforms to the preset change model.

[0076] In some embodiments, S200, according to determining a change model of the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration, includes:

[0077] A concentration difference variation model is determined based on the concentration difference of each port at at least two different time points.

[0078] Among them, determining the variation model of the concentration difference requires determining the curve model of the concentration difference varying with time, so the concentration difference at at least two different time points is required to determine the curve model of the concentration difference varying with time, and then determine the variation model of the concentration difference.

[0079] In some embodiments, the present invention further provides a refrigerant leakage monitoring device 10, comprising an acquisition module 100 and a judgment module 200. The acquisition module 100 is used to acquire the initial average refrigerant concentration, and the acquisition module 100 is also used to acquire the real-time refrigerant concentration of the first port, the real-time refrigerant concentration of the second port, the real-time refrigerant concentration of the third port, and the real-time refrigerant concentration of the fourth port. The acquisition module 100 is also used to acquire a change model of the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration. The judgment module 200 is used to determine whether a refrigerant leak occurs in each port according to the change model of the concentration difference of each port.

[0080] The refrigerant leakage monitoring device also includes a control module 300, which is further used to control the air conditioner to alarm according to determining that the leakage level is a moderate leakage or above after determining that the refrigerant concentration change rate is greater than or equal to the first change rate.

[0081] In some embodiments, the present invention also provides an air conditioner, which may include components such as a processor 601 of one or more processing cores, a memory 602 of one or more computer-readable storage media, a power supply 603, and an input unit 604. The air conditioner also includes an outdoor unit 400, an indoor unit, a first connecting pipe 410 and a second connecting pipe 510, the first connecting pipe 410 has a first port and a second port, the second connecting pipe 510 has a third port and a fourth port, the first port is connected to the inlet of the outdoor unit 400, the second port is connected to the outlet of the indoor unit, the third port is connected to the outlet of the outdoor unit 400, and the fourth port is connected to the inlet of the indoor unit. It can be understood by those skilled in the art that the structure of the above-mentioned air conditioner does not constitute a limitation on the air conditioner, and may include more or fewer components, or a combination of certain components, or different component arrangements. Among them:

[0082] The processor 601 is the controller of the air conditioner, and uses various interfaces and lines to connect various parts of the entire air conditioner. By running or executing software programs and / or modules stored in the memory 602, and calling data stored in the memory 602, the processor 601 performs various functions of the air conditioner and processes data, thereby monitoring the air conditioner as a whole. Optionally, the processor 601 may include one or more processing cores; preferably, the processor 601 may integrate an application processor 601 and a modem processor 601, wherein the application processor 601 mainly processes the operating system, user interface and computer programs, etc., and the modem processor 601 mainly processes wireless communications. It is understandable that the above-mentioned modem processor 601 may not be integrated into the processor 601.

[0083] The memory 602 can be used to store software programs and modules. The processor 601 executes various functional applications and data processing by running the software programs and modules stored in the memory. The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, a computer program required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the server, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory may also include a memory controller to provide the processor 601 with access to the memory.

[0084] The air conditioner also includes a power supply 603 for supplying power to each component. Preferably, the power supply 603 can be logically connected to the processor 601 through a power management system, so as to manage charging, discharging, and power consumption through the power management system. The power supply can also include any components such as one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, and power status indicators.

[0085] The air conditioner may further include an input unit 604, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0086] Although not shown, the air conditioner may further include a display unit, etc., which will not be described in detail herein. Specifically, in this embodiment, the processor 601 in the air conditioner will load the executable files corresponding to the processes of one or more computer programs into the memory 602 according to the following instructions, and the processor 601 will run the computer programs stored in the memory 602 to perform the following steps:

[0087] Determine an initial average refrigerant concentration, where the initial average refrigerant concentration is an average of an initial refrigerant concentration of the first port, an initial refrigerant concentration of the second port, an initial refrigerant concentration of the third port, and an initial refrigerant concentration of the fourth port;

[0088] A variation model of the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration is determined, and whether refrigerant leakage occurs in each port is determined based on the variation model of the concentration difference of each port.

[0089] By executing the above-mentioned refrigerant leakage monitoring method, the initial average refrigerant concentration and the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration are determined, and then based on the change model of the concentration difference of each port, it is determined whether refrigerant leakage occurs in each port. The leakage situation of each port can be accurately determined, thereby improving the accuracy of refrigerant leakage monitoring.

[0090] A person skilled in the art will appreciate that all or part of the steps in any of the methods in the above embodiments may be completed by a computer program, or by controlling related hardware through a computer program. The computer program may be stored in a computer-readable storage medium and loaded and executed by the processor 601.

[0091] In some embodiments, the first connecting pipe and the second connecting pipe are respectively connected to the outdoor unit 400 and the indoor unit through nuts.

[0092] In some embodiments, a stop valve is provided at the connection between the first connecting pipe and the outdoor unit 400 and the indoor unit, and a stop valve is provided at the connection between the second connecting pipe and the outdoor unit 400 and the indoor unit. It can be understood that the stop valve is used to control the connection and disconnection of the first connecting pipe, the second connecting pipe and the outdoor unit 400 and the indoor unit, that is, when a leak occurs, the leak can be prevented by closing the stop valve.

[0093] Specifically, the first connecting pipe substantially connects the outdoor heat exchanger of the outdoor unit 400 and the indoor heat exchanger 500 of the indoor unit.

[0094] In some embodiments, the present invention further provides a storage medium, the storage medium stores a computer program, and the computer program is loaded and executed by a processor to perform the following steps:

[0095] Determine an initial average refrigerant concentration, where the initial average refrigerant concentration is an average of an initial refrigerant concentration of the first port, an initial refrigerant concentration of the second port, an initial refrigerant concentration of the third port, and an initial refrigerant concentration of the fourth port;

[0096] A variation model of the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration is determined, and whether refrigerant leakage occurs in each port is determined based on the variation model of the concentration difference of each port.

[0097] Through the above steps, the initial average refrigerant concentration and the concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration are determined, and then based on the change model of the concentration difference of each port, it is determined whether refrigerant leakage occurs in each port. The leakage situation of each port can be accurately determined, thereby improving the accuracy of refrigerant leakage monitoring.

[0098] It will be appreciated by those skilled in the art that any reference to memory, storage, database or other medium used in the embodiments provided by the present invention may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synch l ink), DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0099] Since the computer program stored in the storage medium can execute the steps in the air conditioning refrigerant leakage monitoring method in any embodiment provided by the present invention, the beneficial effects that can be achieved by the air conditioning refrigerant leakage monitoring method in any embodiment provided by the present invention can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0100] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0101] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0102] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, within the application concept of the present invention are included in the patent protection scope of the present invention.

Claims

1. A refrigerant leakage monitoring method for monitoring the refrigerant leakage of an air conditioner, characterized in that: The air conditioner comprises an outdoor unit, an indoor unit, a first connecting pipe and a second connecting pipe, wherein the first connecting pipe has a first port and a second port, and the second connecting pipe has a third port and a fourth port, wherein the first port is connected to an inlet of the outdoor unit, the second port is connected to an outlet of the indoor unit, the third port is connected to the outlet of the outdoor unit, and the fourth port is connected to an inlet of the indoor unit, and the refrigerant leakage monitoring method comprises: Determine an initial average refrigerant concentration, where the initial average refrigerant concentration is an average of an initial refrigerant concentration of the first port, an initial refrigerant concentration of the second port, an initial refrigerant concentration of the third port, and an initial refrigerant concentration of the fourth port; A variation model of a concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration is determined, and whether a refrigerant leakage occurs in each port is determined according to the variation model of the concentration difference of each port.

2. The refrigerant leakage monitoring method according to claim 1, characterized in that: After determining that a refrigerant leak occurs at any port, the refrigerant leakage monitoring method further includes: Determine a change rate of the concentration difference at the port where the refrigerant leakage occurs within a first time period; The leakage level of the port where the refrigerant leakage occurs is determined according to the change rate of the concentration difference.

3. The refrigerant leakage monitoring method according to claim 2, characterized in that: The determining of the change rate of the concentration difference value at the port where the refrigerant leakage occurs within the first time period includes: The rate of change of the refrigerant concentration difference is determined according to a change model of the difference between the refrigerant concentration of the port where the refrigerant leakage occurs and the initial average refrigerant concentration within the first period of time.

4. The refrigerant leakage monitoring method according to claim 2, characterized in that: The step of determining the leakage level of the port where the refrigerant leakage occurs according to the change rate of the concentration difference includes: determining whether the rate of change is greater than a first rate of change; When it is determined that the change rate is greater than or equal to the first change rate, the leakage level is determined to be a medium leakage or above, and the air conditioner is controlled to alarm; When it is determined that the change rate is less than the first change rate, the leakage level is determined to be a slight leakage.

5. The refrigerant leakage monitoring method according to claim 4, characterized in that: When the leakage level is determined to be a slight leakage, the refrigerant leakage monitoring method further includes: Whether to supplement refrigerant to the air conditioner is determined according to the difference between the refrigerant concentration of the port where the refrigerant leakage occurs and the initial average refrigerant concentration.

6. The refrigerant leakage monitoring method according to claim 1, characterized in that: The determining whether refrigerant leakage occurs at each port according to the change model of the concentration difference at each port includes: Determining whether the change model conforms to a preset change model; If the change model conforms to the preset change model, it is determined that no refrigerant leakage occurs at the corresponding port; If the change model does not conform to the preset change model, it is determined that a refrigerant leak occurs at the corresponding port.

7. The refrigerant leakage monitoring method according to claim 1, characterized in that: The variation model for determining the difference between the refrigerant concentration of each port and the initial average refrigerant concentration includes: A variation model of the concentration difference is determined according to the concentration difference of each port at at least two different time points.

8. A refrigerant leakage monitoring device, characterized in that: include: An acquisition module, used to acquire an initial average refrigerant concentration, the acquisition module is further used to acquire a real-time refrigerant concentration of the first port, a real-time refrigerant concentration of the second port, a real-time refrigerant concentration of the third port, and a real-time refrigerant concentration of the fourth port, the acquisition module is further used to acquire a change model of a concentration difference between the refrigerant concentration of each port and the initial average refrigerant concentration; The judgment module is used to determine whether refrigerant leakage occurs at each port according to a change model of the concentration difference at each port.

9. An air conditioner, characterized in that: The air conditioner includes an outdoor unit, an indoor unit, a first connecting pipe, a second connecting pipe, a memory and a processor, the first connecting pipe has a first port and a second port, the second connecting pipe has a third port and a fourth port, the first port is connected to the inlet of the outdoor unit, the second port is connected to the outlet of the indoor unit, the third port is connected to the outlet of the outdoor unit, and the fourth port is connected to the inlet of the indoor unit, the memory stores a computer program, and the processor is used to run the computer program in the memory to execute the steps in the refrigerant leakage monitoring method described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a computer program, and the computer program is loaded and executed by the processor to execute the steps in the refrigerant leakage monitoring method according to any one of claims 1 to 7.

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