Monitoring method, device and equipment of stop valve, air conditioner and medium

Abstract

The application provides a monitoring method, device and equipment of a stop valve, an air conditioner and a medium, comprising: determining a first difference between a current temperature of an indoor coil in the air conditioner and a reference temperature of the indoor coil in a current operation mode of the air conditioner after a compressor of the air conditioner operates for a first preset time length; if the first difference is less than a first preset difference corresponding to the current operation mode of the air conditioner, stopping the compressor and adding 1 to a number of times that the first difference is less than the first preset difference; if the number of times reaches a preset number of times, determining that the stop valve is not opened, and maintaining the stop state of the compressor; if the number of times does not reach the preset number of times, restarting the compressor after a second preset time length of the stop state of the compressor is reached to perform next detection, so that whether the stop valve is opened or not can be accurately detected, the compressor is stopped when the stop valve is not opened, the phenomenon that the system pressure is high due to the non-circulation of refrigerant and damage is easily caused is prevented, and the safety of the operation of the compressor is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically providing a method, device, equipment, air conditioner, and medium for monitoring a shut-off valve. Background Technology

[0002] Split-type air conditioners consist of an indoor unit and an outdoor unit. During installation and trial operation, the construction team sometimes forgets to open the shut-off valve. If the shut-off valve is not open, the refrigerant will not circulate after the air conditioner is powered on, resulting in high system pressure and potential damage.

[0003] Therefore, how to promptly inspect and ensure the shut-off valve is fault-free after installation and maintenance, and improve the safety of air conditioning operation, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention is proposed to provide a method, apparatus, equipment, air conditioner and medium for monitoring shut-off valves, which solves or at least partially solves the technical problem that air conditioners are easily damaged due to high system pressure after installation and maintenance because the shut-off valve is forgotten to be opened.

[0005] In a first aspect, the present invention provides a method for monitoring a shut-off valve, the method comprising:

[0006] After the air conditioner compressor has been running for a first preset time, the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner is determined.

[0007] If the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, the compressor is controlled to stop, and the number of times the first difference is less than the first preset difference is incremented by 1;

[0008] If the number of times reaches the preset number, it is determined that the shut-off valve is not open, and the compressor remains in a stopped state;

[0009] If the number of tests is not reached, the compressor will be restarted and the next test will be performed after the shutdown time reaches the second preset time.

[0010] Furthermore, the aforementioned method for monitoring the shut-off valve also includes:

[0011] If the difference is greater than or equal to the first preset difference corresponding to the current operating mode of the air conditioner, the return air temperature of the indoor unit is obtained;

[0012] When the second difference between the current temperature of the indoor unit coil and the return air temperature of the indoor unit is greater than the second preset difference, the timing starts to obtain the first cumulative timing duration when the second difference is greater than the second preset difference in the current air conditioner operation mode.

[0013] Determine the sum of the first cumulative timing duration and the second cumulative duration under other air conditioning operating modes;

[0014] If the sum is greater than or equal to the third preset duration, it is determined that the shut-off valve has been opened.

[0015] Furthermore, the aforementioned method for monitoring the shut-off valve also includes:

[0016] If the sum is greater than or equal to the third preset duration, the shut-off valve protection function is disabled until the air conditioner is detected to be running again, at which point the shut-off valve protection function is activated.

[0017] Furthermore, in the aforementioned monitoring method for the shut-off valve, before determining the first difference between the current temperature of the indoor unit coil in the air conditioner and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner, the method further includes:

[0018] If the air conditioner is currently operating in heating mode, the first sampled temperature of the indoor unit coil will be used as the reference temperature of the indoor unit coil.

[0019] Furthermore, in the aforementioned monitoring method for the shut-off valve, before determining the first difference between the current temperature of the indoor unit coil in the air conditioner and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner, the method further includes:

[0020] If the air conditioner is currently operating in cooling or dehumidification mode, the indoor unit is controlled to run for a fourth preset time, and the lowest temperature of the indoor unit coil collected within the fourth preset time is used as the reference temperature of the indoor unit coil.

[0021] In a second aspect, the present invention provides a monitoring device for a shut-off valve, the monitoring device comprising:

[0022] The determination module is used to determine the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner after the air conditioner compressor has been running for a first preset time.

[0023] The control module is configured to control the compressor to stop if the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, and increment the number of times the first difference is less than the first preset difference by 1; if the number reaches the preset number, determine that the shut-off valve is not open and maintain the compressor in a stopped state; if the number does not reach the preset number, restart the compressor and perform the next detection after the compressor stops for a second preset time.

[0024] Furthermore, in the aforementioned monitoring device for the shut-off valve, the control module is also used for:

[0025] If the difference is greater than or equal to the first preset difference corresponding to the current operating mode of the air conditioner, the return air temperature of the indoor unit is obtained;

[0026] When the second difference between the current temperature of the indoor unit coil and the return air temperature of the indoor unit is greater than the second preset difference, the timing starts to obtain the first cumulative timing duration when the second difference is greater than the second preset difference in the current air conditioner operation mode.

[0027] Determine the sum of the first cumulative timing duration and the second cumulative duration under other air conditioning operating modes;

[0028] If the sum is greater than or equal to the third preset duration, it is determined that the shut-off valve has been opened.

[0029] In a third aspect, the present invention provides a monitoring device for a shut-off valve, the monitoring device comprising a processor and a storage device, the storage device being adapted to store a plurality of program codes, the program codes being adapted to be loaded and run by the processor to perform the shut-off valve monitoring method described in any of the preceding claims.

[0030] In a fourth aspect, an air conditioner is provided that includes a monitoring device for the shut-off valve as described above.

[0031] In a fifth aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored therein, the program codes being adapted to be loaded and run by a processor to perform the monitoring method for the shut-off valve described in any of the preceding claims.

[0032] The above-described technical solutions of the present invention have at least one or more of the following beneficial effects:

[0033] In implementing the technical solution of the present invention, after the air conditioner compressor has been running for a first preset time, a first difference is determined between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner; if the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, the compressor is controlled to stop, and the number of times the first difference is less than the first preset difference is incremented by 1; if the number reaches a preset number, it is determined that the shut-off valve is not open, and the compressor is kept in a stopped state; if the number does not reach the preset number, after the compressor is stopped for a second preset time, it is restarted and the next detection is performed. In this way, it is possible to accurately detect whether the shut-off valve is open, and when the shut-off valve is not open, the compressor is controlled to stop, preventing damage caused by high system pressure due to non-circulation of refrigerant, thus improving the safety of compressor operation. Attached Figure Description

[0034] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0035] Figure 1 This is a schematic flowchart of the main steps of a monitoring method for a shut-off valve according to an embodiment of the present invention;

[0036] Figure 2 This is a schematic flowchart of the main steps of a monitoring method for a shut-off valve according to another embodiment of the present invention;

[0037] Figure 3 This is a main structural block diagram of a monitoring device for a shut-off valve according to an embodiment of the present invention.

[0038] Figure 4 This is a main structural block diagram of a monitoring device for a shut-off valve according to an embodiment of the present invention. Detailed Implementation

[0039] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0040] In the description of this invention, "module" and "processor" can include hardware, software, or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, memory, and may also include software components, such as program code, or a combination of software and hardware. A processor can be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media includes any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and / or B" and can include only A, only B, or A and B. The singular terms "a" or "this" can also include plural forms.

[0041] Split-type air conditioners consist of an indoor unit and an outdoor unit. During installation and trial operation, the construction team sometimes forgets to open the shut-off valve. If the shut-off valve is not open, the refrigerant will not circulate after the air conditioner is powered on, resulting in high system pressure and potential damage.

[0042] Therefore, in order to solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0043] See appendix Figure 1 , Figure 1 This is a schematic flowchart illustrating the main steps of a monitoring method for a shut-off valve according to an embodiment of the present invention. Figure 1 As shown, the monitoring method for the shut-off valve in this embodiment of the invention mainly includes the following steps 101-105.

[0044] Step 101: After the air conditioner compressor has been running for a first preset time, determine the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner.

[0045] In a specific implementation process, after the air conditioner is installed or repaired, it is put into trial operation. During the trial operation, after the air conditioner compressor runs for a first preset time (e.g., 5 minutes), the current temperature of the indoor unit coil can be obtained. The difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner is calculated to obtain the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner.

[0046] In a specific implementation, if the air conditioner is currently operating in heating mode, the first sampled temperature of the coil can be used as the reference temperature of the indoor unit coil. Specifically, in heating mode, after receiving the start command, the indoor fan will not run to prevent cold air from blowing into the room and affecting the user experience. Therefore, the first sampled temperature of the coil can be used as the reference temperature of the indoor unit coil.

[0047] In a specific implementation, if the air conditioner is currently operating in cooling or dehumidification mode, the indoor unit can be controlled to run for a fourth preset duration (2 minutes), and the lowest temperature of the indoor unit coil collected within this fourth preset duration can be used as the reference temperature of the indoor unit coil. Specifically, when the air conditioner is in cooling or dehumidification mode, the indoor fan starts directly after receiving the start command. In order to accurately detect the opening and closing status of the shut-off valve, the indoor unit can be controlled to run for a fourth preset duration, and the indoor unit coil temperature can be sampled periodically to obtain multiple indoor unit coil temperature values. The lowest temperature of the indoor unit coil collected within the fourth preset duration can be used as the reference temperature of the indoor unit coil.

[0048] Step 102: If the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, control the compressor to stop and increment the number of times the first difference is less than the first preset difference by 1;

[0049] In a specific implementation process, if the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, it indicates that the shut-off valve may not be open. At this time, the compressor can be stopped to protect the shut-off valve. However, if the first difference is occasionally less than the first preset difference corresponding to the current operating mode of the air conditioner, it cannot be confirmed that the shut-off valve is not open. Therefore, the number of times the first difference is less than the first preset difference can be incremented by 1.

[0050] In a specific implementation, when the air conditioner is currently operating in cooling or dehumidification mode, the first preset difference can be 1℃. When the air conditioner is currently operating in heating mode, the first preset difference can be 2℃.

[0051] Step 103: Check whether the number of times has reached the preset number; if yes, proceed to step 104; if no, proceed to step 105.

[0052] Step 104: Determine that the shut-off valve is not open and maintain the compressor in a stopped state;

[0053] In a specific implementation, if the number of occurrences reaches a preset number, it can be definitively determined that this phenomenon is caused by the shut-off valve not opening. At this point, it can be confirmed that the shut-off valve is not open, the compressor remains off, and a fault code can be displayed. This enables the air conditioner to perform the shut-off valve protection function, preventing refrigerant from not circulating after the air conditioner is powered on, which could lead to high system pressure and potential damage. In a specific implementation, this preset number of occurrences can be 3.

[0054] Step 105: After the compressor has been off for a period of time that reaches the second preset time, restart it and perform the next test.

[0055] In a specific implementation, if the number of tests does not reach the preset number, it indicates that other reasons may cause the first difference to be less than the first preset difference corresponding to the current operating mode of the air conditioner. When the compressor shutdown time reaches the second preset time, it can be restarted for the next test. The second preset time is the pre-set minimum compressor shutdown time.

[0056] The monitoring method for the shut-off valve in this embodiment determines a first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner after the air conditioner compressor has been running for a first preset time. If the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, the compressor is controlled to stop, and the number of times the first difference is less than the first preset difference is incremented by 1. If the number of times reaches a preset number, it is determined that the shut-off valve is not open, and the compressor is kept in a stopped state. If the number of times does not reach the preset number, the compressor is restarted and the next detection is performed after the compressor has been stopped for a second preset time. In this way, it is possible to accurately detect whether the shut-off valve is open, and control the compressor to stop when the shut-off valve is not open, preventing damage caused by high system pressure due to non-circulation of refrigerant, thus improving the safety of compressor operation.

[0057] See appendix Figure 2 , Figure 2 This is a schematic flowchart illustrating the main steps of a monitoring method for a shut-off valve according to another embodiment of the present invention. Figure 2 As shown, the monitoring method for the shut-off valve in this embodiment of the invention mainly includes the following steps 201-210.

[0058] Step 201: After the air conditioner compressor has been running for a first preset time, determine the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner.

[0059] Step 202: Detect whether the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner; if yes, proceed to step 203; if no, proceed to step 207.

[0060] Step 203: Control the compressor to stop, and increment the number of times the first difference is less than the first preset difference by 1;

[0061] If the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, in order to prevent the system pressure from being high due to the refrigerant not circulating because the shut-off valve is not open, the compressor can be controlled to stop and the number of times the first difference is less than the first preset difference can be incremented by 1.

[0062] Step 204: Check whether the number of times has reached the preset number; if yes, proceed to step 205; if no, proceed to step 206.

[0063] Step 205: Determine that the shut-off valve is not open and maintain the compressor in a stopped state;

[0064] Step 206: When the compressor has been off for a period of time that reaches the second preset time, restart it and perform the next test.

[0065] Step 207: Obtain the return air temperature of the indoor unit;

[0066] If the difference is greater than or equal to the first preset difference corresponding to the current operating mode of the air conditioner, the return air temperature of the indoor unit can be obtained, and the second difference between the current temperature of the indoor unit coil and the return air temperature of the indoor unit can be calculated. The second difference is then compared with the second preset difference (5°C).

[0067] Step 208: When the second difference between the current temperature of the indoor unit coil and the return air temperature of the indoor unit is greater than the second preset difference, start timing to obtain the first cumulative timing duration when the second difference is greater than the second preset difference in the current air conditioner operation mode.

[0068] In a specific implementation process, when the second difference between the current temperature of the indoor unit coil and the return air temperature of the indoor unit is greater than the second preset difference, timing begins to obtain the first cumulative timing duration when the second difference is greater than the second preset difference in the current operating mode of the air conditioner.

[0069] Step 209: Determine the sum of the first cumulative timeout duration and the second cumulative timeout duration under other air conditioning operating modes;

[0070] In a specific implementation process, the sum of the first cumulative time duration and the second cumulative time duration under other operating modes of the air conditioner can be calculated, and the sum can be compared with the third preset time duration (24h) to obtain the comparison result.

[0071] Step 210: If the sum is greater than or equal to the third preset time, determine that the shut-off valve has been opened, and / or disable the shut-off valve protection control function until the air conditioner is detected to be running again, then enable the shut-off valve protection function.

[0072] In a specific implementation process, if the sum is greater than or equal to a third preset time, it is determined that the shut-off valve has been opened, and / or the shut-off valve protection control function is disabled until the air conditioner is detected to be running again, at which point the shut-off valve protection function is activated.

[0073] Specifically, when the cumulative timeout duration across all air conditioner operating modes exceeds or equals the third preset duration, it indicates that the shut-off valve has opened. Normally, the shut-off valve will not be closed unless the unit is moved or under maintenance. Therefore, it can be confirmed that the shut-off valve is open, and / or the shut-off valve protection control function is disabled. However, if the air conditioner is moved or under maintenance, upon powering it back on, it will essentially be the first time it is powered on, and the air conditioner will undergo another trial run. In this case, the shut-off valve protection function will be activated again.

[0074] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effects of the present invention, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders, and these variations are all within the scope of protection of the present invention.

[0075] Those skilled in the art will understand that all or part of the processes in the method of the above embodiment of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content included in the computer-readable storage medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electrical carrier signals and telecommunication signals.

[0076] Furthermore, the present invention also provides a monitoring device for a shut-off valve.

[0077] See appendix Figure 3 , Figure 3 This is a main structural block diagram of a monitoring device for a shut-off valve according to an embodiment of the present invention. Figure 3 As shown, the monitoring device for the shut-off valve in this embodiment of the invention may include a determination module 31 and a control module 32.

[0078] The module 31 is used to determine the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner after the air conditioner compressor has been running for a first preset time.

[0079] In a specific implementation process, if the air conditioner is currently operating in heating mode, the first sampled temperature of the indoor unit coil is used as the reference temperature of the indoor unit coil.

[0080] In a specific implementation process, if the air conditioner is currently operating in cooling mode or dehumidification mode, the indoor unit is controlled to run for a fourth preset time, and the lowest temperature of the indoor unit coil collected within the fourth preset time is used as the reference temperature of the indoor unit coil.

[0081] Control module 32 is configured to control the compressor to stop if the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, and increment the number of times the first difference is less than the first preset difference by 1; if the number reaches the preset number, determine that the shut-off valve is not open and maintain the compressor in a stopped state; if the number does not reach the preset number, restart the compressor and perform the next detection after the compressor stops for a second preset time.

[0082] In one specific implementation, the control module 32 is also used to obtain the return air temperature of the indoor unit if the difference is greater than or equal to the first preset difference corresponding to the current operating mode of the air conditioner.

[0083] When the second difference between the current temperature of the indoor unit coil and the return air temperature of the indoor unit is greater than the second preset difference, the timing starts to obtain the first cumulative timing duration when the second difference is greater than the second preset difference in the current air conditioner operation mode.

[0084] Determine the sum of the first cumulative timing duration and the second cumulative duration under other air conditioning operating modes;

[0085] If the sum is greater than or equal to the third preset time, it is determined that the shut-off valve has been opened, and / or the shut-off valve protection control function is disabled until the air conditioner is detected to be running again, at which point the shut-off valve protection function is activated.

[0086] The above-mentioned gate valve monitoring device is used to execute the gate valve monitoring method embodiment shown in the above embodiment. The technical principles, technical problems solved and technical effects produced by the two are similar. Those skilled in the art can clearly understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the gate valve monitoring device can be referred to the content described in the embodiment of the gate valve monitoring method, which will not be repeated here.

[0087] Furthermore, the present invention also provides a monitoring device for a shut-off valve.

[0088] See appendix Figure 4 , Figure 4 This is a main structural block diagram of a monitoring device for a shut-off valve according to an embodiment of the present invention. Figure 4 As shown, the monitoring device for the shut-off valve in this embodiment of the invention may include a processor 41 and a storage device 42.

[0089] The storage device 42 can be configured to store a program for executing the monitoring method of the shut-off valve in the above-described method embodiments, and the processor 41 can be configured to execute the program in the storage device 42, which includes, but is not limited to, the program for executing the monitoring method of the shut-off valve in the above-described method embodiments. For ease of explanation, only the parts related to the embodiments of the present invention are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. The monitoring device for the shut-off valve can be a control device comprising various electronic devices.

[0090] In a specific implementation, there can be multiple storage devices 42 and processors 41. The program executing the valve monitoring method of the above-described method embodiment can be divided into multiple subroutines. Each subroutine can be loaded and run by the processor 41 to execute different steps of the valve monitoring method of the above-described method embodiment. Specifically, each subroutine can be stored in a different storage device 42, and each processor 41 can be configured to execute programs in one or more storage devices 42 to jointly implement the valve monitoring method of the above-described method embodiment. That is, each processor 41 executes different steps of the valve monitoring method of the above-described method embodiment to jointly implement the valve monitoring method of the above-described method embodiment.

[0091] The aforementioned multiple processors 41 can be processors deployed on the same device. For example, the device can be a high-performance device composed of multiple processors, and the multiple processors 41 can be processors configured on that high-performance device. Alternatively, the aforementioned multiple processors 41 can also be processors deployed on different devices. For example, the device can be a server cluster, and the multiple processors 41 can be processors on different servers within the server cluster.

[0092] Furthermore, the present invention also provides an air conditioner that includes a monitoring device for the shut-off valve as described above.

[0093] Furthermore, the present invention also provides a computer-readable storage medium. In one embodiment of the computer-readable storage medium according to the present invention, the computer-readable storage medium can be configured to store a program for performing the monitoring method of the shut-off valve in the above-described method embodiments. This program can be loaded and run by a processor to implement the monitoring method of the shut-off valve. For ease of explanation, only the parts related to the embodiments of the present invention are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. The computer-readable storage medium can be a storage device comprising various electronic devices. Optionally, in the embodiments of the present invention, the computer-readable storage medium is a non-transitory computer-readable storage medium.

[0094] Furthermore, it should be understood that since the various modules are only provided to illustrate the functional units of the device of the present invention, the physical devices corresponding to these modules may be the processor itself, or a part of the processor's software, a part of its hardware, or a combination of software and hardware. Therefore, the number of modules shown in the figures is merely illustrative.

[0095] Those skilled in the art will understand that the various modules in the device can be adaptively split or combined. Such splitting or combining of specific modules will not cause the technical solution to deviate from the principles of the present invention; therefore, the technical solutions after splitting or combining will fall within the protection scope of the present invention.

[0096] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for monitoring a shut-off valve, characterized in that, include: After the air conditioner compressor has been running for a first preset time, the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner is determined. If the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, the compressor is controlled to stop, and the number of times the first difference is less than the first preset difference is incremented by 1; If the number of times reaches the preset number, it is determined that the shut-off valve is not open, and the compressor remains in a stopped state; If the number of tests is not reached, the compressor will be restarted and the next test will be performed after the shutdown time reaches the second preset time. Also includes: If the difference is greater than or equal to the first preset difference corresponding to the current operating mode of the air conditioner, the return air temperature of the indoor unit is obtained; When the second difference between the current temperature of the indoor unit coil and the return air temperature of the indoor unit is greater than the second preset difference, the timing starts to obtain the first cumulative timing duration when the second difference is greater than the second preset difference in the current air conditioner operation mode. Determine the sum of the first cumulative timing duration and the second cumulative duration under other air conditioning operating modes; If the sum is greater than or equal to the third preset duration, it is determined that the shut-off valve has been opened.

2. The monitoring method for the shut-off valve according to claim 1, characterized in that, Also includes: If the sum is greater than or equal to the third preset duration, the shut-off valve protection control function is disabled until the air conditioner is detected to be running again, at which point the shut-off valve protection function is enabled.

3. The monitoring method for the shut-off valve according to claim 1, characterized in that, Before determining the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner, the following steps are also included: If the air conditioner is currently operating in heating mode, the first sampled temperature of the indoor unit coil will be used as the reference temperature of the indoor unit coil.

4. The monitoring method for the shut-off valve according to claim 1, characterized in that, Before determining the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner, the following steps are also included: If the air conditioner is currently operating in cooling or dehumidification mode, the indoor unit is controlled to run for a fourth preset time, and the lowest temperature of the indoor unit coil collected within the fourth preset time is used as the reference temperature of the indoor unit coil.

5. A monitoring device for a shut-off valve, characterized in that, include: The determination module is used to determine the first difference between the current temperature of the indoor unit coil and the reference temperature of the indoor unit coil under the current operating mode of the air conditioner after the air conditioner compressor has been running for a first preset time. The control module is used to control the compressor to stop if the first difference is less than the first preset difference corresponding to the current operating mode of the air conditioner, and to increment the number of times the first difference is less than the first preset difference by 1; if the number reaches the preset number, it is determined that the shut-off valve is not open and the compressor is kept in a stopped state; if the number does not reach the preset number, the compressor is restarted and the next detection is performed after the compressor is stopped for a second preset time. The control module is also used for: If the difference is greater than or equal to the first preset difference corresponding to the current operating mode of the air conditioner, the return air temperature of the indoor unit is obtained; When the second difference between the current temperature of the indoor unit coil and the return air temperature of the indoor unit is greater than the second preset difference, the timing starts to obtain the first cumulative timing duration when the second difference is greater than the second preset difference in the current air conditioner operation mode. Determine the sum of the first cumulative timing duration and the second cumulative duration under other air conditioning operating modes; If the sum is greater than or equal to the third preset duration, it is determined that the shut-off valve has been opened.

6. A monitoring device for a shut-off valve, characterized in that, The device includes a processor and a storage device adapted to store a plurality of program codes, the program codes being adapted to be loaded and run by the processor to perform the monitoring method for the shut-off valve according to any one of claims 1 to 4.

7. An air conditioner, characterized in that, The monitoring device includes the shut-off valve as described in claim 6.

8. A computer-readable storage medium, characterized in that, It stores multiple lines of program code, which are adapted to be loaded and run by a processor to perform the monitoring method for the shut-off valve according to any one of claims 1 to 4.

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