Air conditioning system

Abstract

The invention discloses an air conditioning system which comprises an indoor unit and an outdoor unit and further comprises an alarm, ventilation and cut-off device, the alarm device is configured to give an alarm according to the measured refrigerant gas concentration and generate leakage warning information, and the ventilation device is configured to receive the leakage warning information so as to circulate indoor air and external air to achieve ventilation; the cut-off device comprises a first cut-off pipeline and a second cut-off pipeline which are connected to a first refrigerant pipeline and a second refrigerant pipeline between the indoor unit and the outdoor unit correspondingly to achieve closing and opening. The pressure relief pipeline is provided with a pressure relief valve; and the cut-off device is configured to receive leakage warning information, close one of the first cut-off pipeline and the second cut-off pipeline and conduct the other one so as to convey a refrigerant from one of the indoor unit and the outdoor unit to the other one, and drive the pressure relief valve to conduct the pressure relief pipeline so as to guide the high-pressure refrigerant to the compressor for pressure relief protection. Abnormal conditions can be responded more quickly, and the operation reliability of the air conditioning system is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to an air conditioning system. Background Technology

[0002] Refrigerants such as R32 used in air conditioning systems have low flammability. If a leak occurs during use, an excessive concentration can easily lead to an accident. Usually, a shut-off device is installed in the refrigerant pipeline. The shut-off device is configured to recover refrigerant after a leak in the indoor unit and to cut off the refrigerant in the gas and liquid pipelines, thereby reducing the amount of refrigerant that diffuses into the living space after a leak, and thus reducing potential hazards.

[0003] Existing shut-off devices operate automatically without direct user intervention. However, this "black box" design prevents users from recognizing the signals or indications indicating the device's operation, making them unaware that the air conditioning system has automatically implemented safety measures in the event of a refrigerant leak. Furthermore, after the shut-off device activates, users are unclear whether additional safety measures or contacting maintenance personnel are necessary, leading to unnecessary concerns about the device's safety or improper responses during malfunctions, ultimately impacting user confidence and satisfaction with the product. Summary of the Invention

[0004] To address the problem that a black-box design of the shut-off device can prevent users from recognizing the signals or indications indicating its operation, making them unaware that the air conditioning system has automatically taken safety measures, or causing it to react inappropriately when a malfunction occurs, an air conditioning system is designed and provided.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] In some embodiments of this application, an air conditioning system is provided, including an indoor unit and an outdoor unit, wherein a refrigerant gas concentration sensor is provided in the outdoor unit.

[0007] In one or more embodiments of this application, the air conditioning system further includes an alarm device, which includes a refrigerant gas concentration sensor; the alarm device is configured to issue an alarm and generate a leak warning message based on the measured refrigerant gas concentration.

[0008] In one or more embodiments of this application, the air conditioning system further includes a ventilation device configured to receive the leak warning information to circulate indoor and outdoor air for ventilation.

[0009] In one or more embodiments of this application, the air conditioning system further includes a shut-off device, which includes a first shut-off pipe, a second shut-off pipe, and a pressure relief pipe. The first shut-off pipe is connected to a first refrigerant pipe between the indoor unit and the outdoor unit and is configured to close or open the first refrigerant pipe. The second shut-off pipe is connected to a second refrigerant pipe between the indoor unit and the outdoor unit and is configured to close or open the second refrigerant pipe. The pressure relief pipe is connected between the first shut-off pipe and the second shut-off pipe and is equipped with a pressure relief valve. The shut-off device is configured to receive the leakage warning information, close one of the first shut-off pipe and the second shut-off pipe and open the other to transport refrigerant from one of the indoor unit and the outdoor unit to the other, and drive the pressure relief valve to open the pressure relief pipe to lead the high-pressure refrigerant to the compressor for pressure relief protection.

[0010] In one or more embodiments of this application, the alarm device includes a first luminous alarm.

[0011] In one or more embodiments of this application, when an interval light warning condition is met, the first alarm emits an interval warning light signal; wherein, the interval light warning condition is that the detection value of the refrigerant gas concentration sensor is higher than a first threshold; the interval warning light signal is to illuminate the first alarm, deactivate the first alarm after a set light output time from the moment of illumination, and illuminate the first alarm again after a set light stop time from the moment of deactivation; when the interval light warning condition is met, as the detection value of the refrigerant gas concentration sensor increases, the set light output time and / or the set light stop time shorten.

[0012] In one or more embodiments of this application, the alarm device includes a second audible alarm.

[0013] In one or more embodiments of this application, when an interval sound warning condition is met, the second alarm emits an interval warning sound signal; wherein, the interval sound warning condition is that the detection value of the refrigerant gas concentration sensor is higher than a second threshold; the interval warning sound signal is to make the second alarm sound, and after a set sound output time elapses from the moment it sounds, the second alarm is turned off, and after a set sound stop time elapses from the moment it is turned off, the second alarm sounds again.

[0014] In one or more embodiments of this application, the alarm device generates a leakage warning message when the interval sound warning condition is met.

[0015] In one or more embodiments of this application, the second threshold is higher than the first threshold.

[0016] In one or more embodiments of this application, when the interval sound warning condition is met, the set sound output time and / or set sound stop time are shortened as the detection value of the refrigerant gas concentration sensor increases.

[0017] In one or more embodiments of this application, when the alarm cancellation condition is met, the first alarm stops emitting interval warning light signals, and the second alarm stops emitting interval warning sound signals; the alarm cancellation condition is that the detection value of the refrigerant gas concentration sensor is lower than a third threshold within a set time period and an active cancellation trigger signal is received.

[0018] In one or more embodiments of this application, the third threshold is higher than the first threshold but lower than the second threshold.

[0019] In one or more embodiments of this application, when the continuous warning condition is met, the first alarm emits a continuous warning light signal and the second alarm emits a continuous warning sound signal.

[0020] In one or more embodiments of this application, the continuous warning condition is: the warning cancellation condition is not met within a set judgment period after the interval sound warning condition is met.

[0021] In one or more embodiments of this application, the continuous warning condition is: within a set determination period after the interval sound warning condition is established, the warning cancellation condition is established, but after the warning cancellation condition is established, the interval sound warning condition is established again.

[0022] In one or more embodiments of this application, when performing the first self-test operation, the first alarm emits a first interval self-test light signal; the first interval self-test light signal causes the first alarm to light up, and after a first set light self-test output time from the moment it lights up, the first alarm is turned off, and after a first set light self-test stop time from the moment it is turned off, the first alarm is turned on again, and this continues until the end of the first self-test cycle.

[0023] In one or more embodiments of this application, when performing the second self-test operation, the first alarm emits a second interval self-test light signal; the second interval self-test light signal illuminates the first alarm, turns it off after a second set light self-test output time from the moment it is illuminated, and illuminates it again after a second set light self-test stop time from the moment it is turned off, generating a leakage warning message, which continues until the end of the second self-test cycle.

[0024] In one or more embodiments of this application, the duration of the second self-test cycle is several times that of the first self-test cycle.

[0025] In one or more embodiments of this application, leakage warning information is generated during the execution of the first self-test operation and the second self-test operation until the end of the first self-test cycle.

[0026] In one or more embodiments of this application, when performing the first self-test operation and the second self-test operation, the second alarm emits an interval self-test sound signal; the interval self-test sound signal causes the second alarm to sound, and after a set sound self-test output time from the moment it sounds, the second alarm is turned off, and after a set sound self-test stop time from the moment it is turned off, the second alarm sounds again, continuing until the end of the first self-test cycle.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are:

[0028] The air conditioning system provided in this application has an alarm device that can detect potential problems in advance and generate leakage warning information. After the leakage warning information is received, the ventilation device can provide outside air, and the shut-off device can realize the functions of shutting off the refrigerant pipeline and depressurization protection. It can respond to abnormal situations more quickly and improve the operational reliability of the air conditioning system.

[0029] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a structural diagram of a cutting device according to some embodiments;

[0032] Figure 2 This is another structural diagram of the cutting device according to some embodiments;

[0033] Figure 3 An exploded view of a cutting device according to some embodiments;

[0034] Figure 4 This is another exploded view of the severing device according to some embodiments;

[0035] Figure 5 This is a structural diagram of an electrical box according to some embodiments;

[0036] Figure 6 This is a structural diagram of the main body of the cutting device according to some embodiments after the cover is removed;

[0037] Figure 7 An exploded view of a shell body according to some embodiments;

[0038] Figure 8 This is another exploded view of the shell body according to some embodiments;

[0039] Figure 9 This is a structural diagram of a first cut-off conduit, a second cut-off conduit, and a pressure relief conduit according to some embodiments;

[0040] Figure 10 This is another structural diagram of the first cut-off pipeline, the second cut-off pipeline, and the pressure relief pipeline according to some embodiments;

[0041] Figure 11 This is a structural diagram of a first cut-off conduit according to some embodiments;

[0042] Figure 12 This is a structural diagram of a second cut-off conduit according to some embodiments;

[0043] Figure 13 This is a structural diagram of an insulation section, a cut-off pipe, and a pressure relief pipe according to some embodiments;

[0044] Figure 14 This is another structural diagram of the insulation section, cut-off pipeline, and pressure relief pipeline according to some embodiments;

[0045] Figure 15 This is another structural diagram of the insulation section, cut-off pipe, and pressure relief pipe according to some embodiments;

[0046] Figure 16 This is a structural diagram of the insulation main body according to some embodiments;

[0047] Figure 17 This is a schematic diagram illustrating the working principle of an air conditioning system according to some embodiments;

[0048] Figure 18 This is a schematic diagram illustrating the working principle of an air conditioning system during cooling, according to some embodiments.

[0049] Figure 19 This is a schematic diagram illustrating the working principle of an air conditioning system according to some embodiments when it is cooling and a refrigerant leak occurs on the indoor side;

[0050] Figure 20 for Figure 19The flowchart shown illustrates an air conditioning system in cooling mode when a refrigerant leak occurs on the indoor side.

[0051] Figure 21 A schematic diagram illustrating the working principle of a pressure relief protection device when an air conditioning system is cooling and the indoor unit is off, according to some embodiments;

[0052] Figure 22 for Figure 21 The diagram shows a process where the shut-off device provides pressure relief protection when the air conditioning system is cooling and the indoor unit is off.

[0053] Figure 23 Another schematic diagram illustrating the working principle of the cut-off device for pressure relief protection when the air conditioning system is cooling and the indoor unit is off, according to some embodiments;

[0054] Figure 24 for Figure 23 The diagram shows another flow chart of the pressure relief protection device when the air conditioning system is cooling and the indoor unit is off;

[0055] Figure 25 This is a schematic diagram illustrating the working principle of an air conditioning system in heating mode according to some embodiments;

[0056] Figure 26 This is a schematic diagram illustrating the working principle of an air conditioning system according to some embodiments when heating is in progress and refrigerant leakage occurs on the indoor side;

[0057] Figure 27 This is a timing diagram of an air conditioning system according to some embodiments;

[0058] Figure 28 This is a timing diagram of an air conditioning system according to some embodiments;

[0059] Figure 29 This is a schematic diagram of the structure of an alarm device in an air conditioning system according to some embodiments;

[0060] Figure 30 This is a schematic block diagram of an air conditioning system according to some embodiments;

[0061] In the diagram: 10. Indoor unit; 11. Indoor heat exchanger; 12. Indoor throttling device; 20. Outdoor unit; 21. Outdoor heat exchanger; 22. Outdoor throttling device; 23. Outdoor fan; 24. Compressor; 25. Four-way valve; 26. Liquid receiver; 30. First refrigerant line; 40. Second refrigerant line; 50. Shut-off device; 100. Main body; 110. First shut-off line; 111. First shut-off line section 1; 112. First shut-off line section 2; 113. First shut-off line section 3; 114. First switch; 115. First filter; 120. Second shut-off line; 121. Second shut-off line section 1; 122. Second shut-off line section 2; 123. Second shut-off line section 3; 124. Second switch; 125. Second filter; 130. Pressure relief line; 131. Pressure relief valve; 140 141. Shell body; 142. Cover; 143. End plate; 1431. First notch; 144. Side plate; 1441. Second notch; 145. Pipe port; 146. Second wiring port; 147. Connecting part; 148. Second connecting part; 150. Insulation part; 200. Electrical box; 210. Box body; 220. Control board; 211. First box body; 212. Second box body; 213. First wiring port; 214. First connecting part; 300. Insulation part; 310. Insulation main body; 311. First groove structure; 312. Second groove structure; 313. Third groove structure; 320. Insulation cover plate; 60. Alarm device; 61. Refrigerant gas concentration sensor; 62. First alarm; 63. Second alarm; 64. Shell; 65. Reset button; 70. Ventilation device. Detailed Implementation

[0062] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0064] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0065] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct release between the first and second features, or release between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0068] This embodiment discloses an air conditioning system, including an outdoor unit 20 and at least one indoor unit 10. The air conditioning system performs a refrigeration cycle by using a compressor 24, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0069] Low-temperature, low-pressure refrigerant enters compressor 24, where it is compressed into a high-temperature, high-pressure refrigerant gas, which is then discharged. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0070] The expansion valve expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor 24. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0071] The outdoor unit 20 is equipped with an outdoor heat exchanger 21, a compressor 24, an outdoor throttling device 22, an outdoor fan 23, a four-way valve 25, a liquid storage tank 26, etc., while the indoor unit 10 is equipped with an indoor heat exchanger 11, an indoor throttling valve, and an indoor fan 13, etc.

[0072] Indoor heat exchanger 11 and outdoor heat exchanger 21 are used as condensers or evaporators. When indoor heat exchanger 11 is used as a condenser, the air conditioning system is used as a heater in heating mode, and when indoor heat exchanger 11 is used as an evaporator, the air conditioning system is used as a cooler in cooling mode.

[0073] The air conditioning system in this embodiment also includes a shut-off device 50, which is located between the indoor unit 10 and the outdoor unit 20, specifically between the indoor throttling device 12 and the outdoor throttling device 22. The indoor unit 10 and the outdoor unit 20 are connected to the inlet and outlet of the shut-off device 50 via refrigerant pipelines. The shut-off device 50 can be installed between the outdoor unit 20 and the indoor unit 10 depending on the site conditions; for example, it can be installed outside the room, or it can be installed indoors.

[0074] The shut-off device 50 includes a shut-off pipe and a pressure relief pipe 130. The shut-off pipe is located on the refrigerant line between the indoor unit 10 and the outdoor unit 20, and is configured to either cut off or allow the refrigerant line to continue, thus achieving a refrigerant shut-off function. The pressure relief pipe 130 is configured to provide pressure relief protection.

[0075] Specifically, refer to Figure 9 and Figure 17 A first refrigerant line 30 and a second refrigerant line 40 are provided between the indoor unit 10 and the outdoor unit 20, and are configured to transport refrigerant. An indoor throttling device 12 and an outdoor throttling device 22 are provided on the first refrigerant line 30.

[0076] The shut-off piping includes a first shut-off piping 110 and a second shut-off piping 120. The first shut-off piping 110 is connected to the first refrigerant piping 30 between the indoor unit 10 and the outdoor unit 20, and is configured to shut off or open the first refrigerant piping 30. Specifically, the first shut-off piping 110 is connected between the indoor heat exchanger 11 and the outdoor heat exchanger 21, or in other words, the first shut-off piping 110 is connected between the indoor throttling device 12 and the outdoor throttling device 22.

[0077] The first disconnection line 110 is switched on / off via a first switch 114. The first switch 114 is configured to control the closure or opening of the first disconnection line 110.

[0078] The second shut-off pipe 120 is connected to the second refrigerant pipe 40 between the indoor unit 10 and the outdoor unit 20, and is configured to close or open the second refrigerant pipe 40. Specifically, the second shut-off pipe 120 is connected between the indoor unit 10 and the compressor 24.

[0079] The second disconnecting conduit 120 is switched on / off via a second switching element 124. The second switching element 124 is configured to control the closing or opening of the first disconnecting conduit 110.

[0080] One of the first cut-off pipe 110 and the second cut-off pipe 120 is closed while the other is open, so as to transport refrigerant from one of the indoor unit 10 and the outdoor unit 20 to the other.

[0081] The pressure relief line 130 is connected between the first cut-off line 110 and the second cut-off line 120. The pressure relief line 130 is equipped with a pressure relief valve 131. The pressure relief line 130 is configured to lead the high-pressure refrigerant in the refrigerant line between the indoor unit 10 and the outdoor unit 20 to the compressor 24 of the air conditioning system in order to provide pressure relief protection for the air conditioning system.

[0082] The first end of the pressure relief pipe 130 is connected to the refrigerant pipe between the first switch 114 and the indoor unit 10, that is, the first end of the pressure relief pipe 130 is connected between the first switch 114 and the indoor throttling device 12.

[0083] The second end of the pressure relief pipe 130 is connected to the refrigerant pipe between the second switch 124 and the outdoor unit 20, that is, the second end of the pressure relief pipe 130 is connected between the second switch 124 and the compressor 24.

[0084] If a refrigerant leak occurs on side 10 of the indoor unit and is not detected and addressed in a timely manner, a safety accident can easily occur. For example... Figure 30As shown, based on the cutoff device 50, the air conditioning system in this embodiment also includes an alarm device 60. The alarm device 60 includes a refrigerant gas concentration sensor 61. The alarm device 60 can be installed in the air-conditioned room or at a location where refrigerant leaks need to be detected. The alarm device 60 is configured to issue an alarm and generate leak warning information based on the measured refrigerant gas concentration. The alarm device 60 is communicatively connected to the controller in the air conditioning system. The controller in the air conditioning system can be the controller in the indoor unit 10, the controller in the outdoor unit 20, or a cloud server connected via a gateway. The alarm device 60 can output leak warning information. Based on the alarm device 60, the air conditioning system provided in this embodiment also includes a ventilation device 70. The ventilation device 70 is configured to receive the leak warning information generated by the alarm device 60 and circulate indoor and outdoor air to achieve ventilation. For example, the leak warning information can be communicated via optical coupling. Optical coupling communication can achieve electrical isolation and has the characteristics of high speed, large bandwidth, and low power consumption. The leak warning information can also be communicated via wired communication, wireless communication, or other similar methods, which will not be listed here.

[0085] When the air conditioning system is cooling normally, refer to Figure 18 Indoor unit 10 and outdoor unit 20 are operating normally. At this time, the first switch 114 and the second switch 124 are open, the pressure relief valve 131 is closed, the first shut-off pipe 110 and the second shut-off pipe 120 are in a conductive state, the pressure relief pipe 130 is closed, and the first refrigerant pipe 30 and the second refrigerant pipe 40 are conductive. The refrigerant flowing out of compressor 24 flows sequentially through outdoor heat exchanger 21, outdoor throttling device 22, first shut-off pipe 110, indoor throttling device 12, indoor heat exchanger 11, second shut-off pipe 120, liquid receiver 26, and compressor 24, completing one cycle.

[0086] If refrigerant leaks on side 10 of the indoor unit during cooling mode, such as Figure 19 and Figure 20 As shown, for example, the controller of the indoor unit 10 receives a leak warning message and uses the communication between the outdoor unit 20 and the indoor unit 10 to transmit the leak warning message to the controller of the outdoor unit 20 and the control terminal of the shut-off device 50. The first switch 114 is closed, controlling the first shut-off pipe 110 to close, blocking the refrigerant from continuing to flow to the indoor unit 10. The pressure relief valve 131 is closed, and the pressure relief pipe 130 is closed. The second switch 124 is opened, making the second shut-off pipe 120 open. The outdoor unit 20 receives the refrigerant leak signal and runs in refrigerant recovery mode. The compressor 24 continues to run, drawing refrigerant from the indoor unit 10 into the compressor 24, compressing and recovering it for storage on the outdoor unit 20 side. When the refrigerant recovery operation time of the compressor 24 is completed, the control terminal of the shut-off device 50 controls the first shut-off pipe 110 and the second shut-off pipe 120 to close. At the same time, the compressor 24 stops working, notifying and waiting for refrigerant leak fault handling.

[0087] It should be noted that, based on the actual situation, the preset compressor running time is T.

[0088] The controller includes a processor. The processor may include a central processing unit (CPU), a microprocessor, or an application-specific integrated circuit (ASIC), and may be configured to perform the corresponding operations described in the controller when the processor executes a program stored in a non-transitory computer-readable medium coupled to the controller.

[0089] Reference Figure 20 Once the air conditioning system is powered on, the process begins (S10), and the controller is configured to execute steps S11 to S19.

[0090] S11, indoor unit 10, and outdoor unit 20 are operating normally, and compressor 24 is running at this time.

[0091] S12. At this time, the first switch 114 and the second switch 124 are opened, and the pressure relief valve 131 is closed.

[0092] S13. Determine whether a leakage warning message has been received; if yes, proceed to S14; if no, proceed to S11.

[0093] S14. If it is determined that a leakage warning message has been received, then turn off the first switch 114.

[0094] S15, refrigerant recovery mode, compressor runs 24 hours a day.

[0095] S16. Determine if the compressor running time is greater than or equal to T; if yes, proceed to S17; if no, proceed to S15.

[0096] S17, the first cut-off line 110 and the second cut-off line 120 are closed, and the compressor 24 stops working at the same time.

[0097] S18. Notify and wait for refrigerant leak troubleshooting.

[0098] S19, End.

[0099] When the air conditioning system is in normal heating mode, refer to Figure 25Indoor unit 10 and outdoor unit 20 are operating normally. At this time, the first switch 114 and the second switch 124 are open, the pressure relief valve 131 is closed, the first cut-off pipe 110 and the second cut-off pipe 120 are in a conductive state, the pressure relief pipe 130 is closed, and the first refrigerant pipe 30 and the second refrigerant pipe 40 are conductive. The refrigerant flowing out of the compressor 24 flows sequentially through the second cut-off pipe 120, the indoor heat exchanger 11, the indoor throttling device 12, the first cut-off pipe 110, the outdoor throttling device 22, the outdoor heat exchanger 21, the liquid receiver 26, and the compressor 24, completing one cycle.

[0100] If a leak occurs on side 10 of the indoor unit during heating mode, refer to... Figure 25 For example, the controller of the indoor unit 10 receives a leak warning message and uses the communication between the outdoor unit 20 and the indoor unit 10 to transmit the leak warning message to the controller of the outdoor unit 20 and the control terminal of the shut-off device 50. The second switch 124 is closed, controlling the second shut-off pipe 120 to close, blocking the refrigerant from continuing to flow to the indoor unit 10. The pressure relief valve 131 is closed, the pressure relief pipe 130 is closed, and the first switch 114 is opened, making the first shut-off pipe 110 open. The outdoor unit 20 receives the refrigerant leak signal and runs the refrigerant recovery mode. The compressor 24 continues to run, drawing refrigerant from the indoor unit 10 into the compressor 24, compressing and recovering it for storage on the outdoor unit 20 side. When the refrigerant recovery operation time of the compressor 24 is completed, the control terminal of the shut-off device 50 controls the first shut-off pipe 110 and the second shut-off pipe 120 to close, and the compressor 24 stops working, notifying and waiting for refrigerant leak fault handling.

[0101] This air conditioning system detects refrigerant leaks and shuts off the gas and liquid refrigerant lines via the shut-off device 50, completely preventing refrigerant from continuing to flow to the indoor unit 10 and causing a refrigerant leak. It also recovers the refrigerant to the outdoor unit 20, thus solving the hidden danger of large-scale leaks of flammable and explosive refrigerants such as R32 and R290.

[0102] When the shut-off device 50 is applied to the air conditioning system, a complete isolation between the indoor unit 10 side and the outdoor unit 20 side can be achieved by using a set of shut-off devices 50. When either the indoor unit 10 or the outdoor unit 20 needs to be repaired or parts replaced, the refrigerant can be delivered to the side that does not need to be repaired, and the refrigerant pipeline connecting the indoor unit 10 and the outdoor unit 20 can be shut off, thereby effectively preventing refrigerant leakage on the repair side and reducing the probability of accidents.

[0103] Considering the different operating modes of the air conditioning system, the high-pressure refrigerant pressure may increase with environmental changes, potentially leading to system pipeline rupture and leakage. This air conditioning system uses a cut-off device 50 to simultaneously provide high-pressure relief protection, thus resolving the above potential hazards.

[0104] One embodiment of depressurization protection for the air conditioning system using the cut-off device 50, such as... Figure 21 and 22 As shown, the air conditioning system is in cooling mode at this time. Indoor unit 10, outdoor unit 20, and compressor 24 operate according to normal settings. The first switch 114 and the second switch 124 are normally open, and the pressure relief valve 131 is closed. That is, the first cut-off pipe 110 and the second cut-off pipe 120 are open, while the pressure relief pipe 130 is closed. During the air conditioning cooling operation, when the user turns off indoor unit 10, the indoor throttling device 12 will also close. In this state, high-pressure refrigerant will be liquid-sealed in the refrigerant pipeline from the outdoor unit 20 side to the indoor throttling device 12. With changes in the external environment, such as an increase in temperature, the pressure of the liquid-sealed refrigerant will increase and exceed the pipeline's bearing pressure, thereby causing a pipeline rupture and refrigerant leakage accident. When the pressure Pa1 in the liquid seal pipeline is greater than the opening pressure Pa2 of the pressure relief valve 131, the pressure relief valve 131 opens to relieve pressure on the high-pressure end. The high-pressure refrigerant flows to the compressor 24 through the pressure relief pipeline 130. When the pressure drops to the closing pressure Pa3 of the pressure relief valve 131, the pressure relief valve 131 closes. This cycle protects the system pipeline and prevents refrigerant leakage.

[0105] Reference Figure 22 In some embodiments, as described above Figure 20 The difference in the steps performed by the controller is that after step S12, the controller does not perform steps S13 to S18, but is instead configured to perform steps S21 to S25.

[0106] S21, Indoor unit 10 is turned off, indoor throttling device 12 is turned off.

[0107] S22. Determine whether the pressure Pal value in the liquid seal pipeline is greater than the opening pressure Pa2 of the pressure relief valve 131; if yes, execute S23; if no, execute S21.

[0108] S23, Pressure relief valve 131 is open.

[0109] S24. Determine whether the pressure Pa1 in the liquid seal pipeline is less than or equal to the closing pressure Pa3 of the pressure relief valve 131; if yes, proceed to S25; if no, proceed to S23.

[0110] S25, pressure relief valve 131 is closed.

[0111] This is a second embodiment of providing pressure relief protection for the air conditioning system using the cut-off device 50, such as... Figure 23 and Figure 24As shown, the air conditioning system is in cooling mode at this time. Indoor unit 10, outdoor unit 20, and compressor 24 operate according to normal settings. The first switch 114 and the second switch 124 are normally open, and the pressure relief valve 131 is closed. That is, the first shut-off pipe 110 and the second shut-off pipe 120 are open, while the pressure relief pipe 130 is closed. During air conditioning operation, if the user turns off indoor unit 10, the indoor throttling device 12 will also close. In this state, if refrigerant leakage occurs on the indoor unit 10 side, according to... Figure 19 In the operating mode shown, the system will shut down the first switch 114. At this time, high-pressure refrigerant will be liquid-sealed in the pipeline between the first switch 114 and the indoor throttling device 12. With changes in the external environment, such as an increase in temperature, the pressure of the liquid-sealed refrigerant will increase and exceed the pipeline's bearing pressure, leading to pipeline rupture and refrigerant leakage. When the pressure Pa1 of the liquid-sealed pipeline is greater than the opening pressure Pa2 of the pressure relief valve 131, the pressure relief valve 131 opens to relieve pressure on the high-pressure end. The high-pressure refrigerant flows to the compressor 24 through the pressure relief pipeline 130. When the pressure drops to the closing pressure Pa3 of the pressure relief valve 131, the pressure relief valve 131 closes. This cycle protects the system pipeline and prevents refrigerant leakage.

[0112] Reference Figure 24 In some embodiments, as described above Figure 22 The difference in the steps performed by the controller is that, between steps S21 and S22, the controller is also configured to perform steps S13 to S14.

[0113] The air conditioning system provided in this application has an alarm device 60 that can detect potential problems in advance and generate leakage warning information. After the leakage warning information is received, the ventilation device 70 can provide outside air. The shut-off device 50 can realize the functions of shutting off the refrigerant pipeline and depressurization protection, which can respond to abnormal situations more quickly and improve the operational reliability of the air conditioning system.

[0114] In some embodiments, a first filter 115 is provided on the first cut-off conduit 110 and a second filter 125 is provided on the second cut-off conduit 120, which are configured to filter impurities in the system.

[0115] Two first filters 115 are provided on both sides of the first switching member 114. Two second filters 125 are provided on both sides of the second switching member 124.

[0116] Reference Figure 17 One end of the pressure relief pipe 130 is connected between the first switch 114 and one of the first filters 115, which is located on the side closer to the indoor unit 10. The other end of the pressure relief pipe 130 is connected between the second switch 124 and one of the second filters 125, which is located on the side closer to the outdoor unit 20.

[0117] In some embodiments, refer to Figures 1 to 4 The cutting-off device 50 includes a main body 100 and an electrical box 200.

[0118] The main body 100 of the shut-off device 50 includes a housing 140, within which a first shut-off pipe 110, a second shut-off pipe 120, and a pressure relief pipe 130 are configured to be installed. Both ends of the first shut-off pipe 110 and both ends of the second shut-off pipe 120 extend from the housing 140 for connection to external refrigerant piping.

[0119] The electrical box 200 includes a box body 210, and a control board 220 is provided inside the box body 210. The control board 220 is configured to control the opening and closing of the first switch 114, the second switch 124, and the pressure relief valve 131.

[0120] The main body 100 of the cut-off device 50 is connected side-by-side with the electrical box 200, that is, the housing 140 and the box 210 are connected side-by-side. In this way, the refrigerant pipeline and the control board 220 are installed in separate spaces, separating the refrigerant pipeline and the control board 220. This prevents condensation generated in the refrigerant pipeline inside the housing 140 from activating the control board 220, which could cause abnormalities such as short circuits in the control board 220, thus helping to improve the operational reliability of the air conditioning system.

[0121] The separate design of the main body 100 of the cutting-off device 50 and the electrical box 200 also facilitates the assembly of the cutting-off device 50. During installation, the main body 100 of the cutting-off device 50 and the electrical box 200 are assembled separately, that is, the first cutting-off pipe 110, the second cutting-off pipe 120 and the pressure relief pipe 130 are installed into the housing 140, the control board 220 is installed into the box 210, and then the main body 100 of the cutting-off device 50 and the electrical box 200 are connected side by side.

[0122] In some embodiments, the electrical box 200 has a first connecting portion 214 on its side wall, and the housing 140 has second connecting portions 148 on its two opposite side walls. The first connecting portion 214 is selectively connected to the second connecting portion 148 on one side of the housing 140. That is, the electrical box 200 can be assembled on both sides to adapt to different installation scenarios on site.

[0123] In one specific embodiment, reference is made to Figure 3 and Figure 5 The first connecting part 214 is a hook. The two corners of the upper side of the electrical box 200 are respectively provided with hooks. Correspondingly, the two opposite side walls of the housing 140 are provided with slots. By hanging the hooks into the slots, the electrical box 200 can be assembled onto the main body 100 of the cutting device 50, which is convenient for installation.

[0124] In some embodiments, the box body 210 of the electrical box 200 includes a first box body 211 and a second box body 212, and the first box body 211 and the second box body 212 are fastened together.

[0125] In some embodiments, the side wall of the electrical box 200 is provided with a first wiring port 213, and the first wiring port 213 and the first connecting part 214 are located on the same side. Correspondingly, the two opposite side walls of the housing 140 are provided with second wiring ports 146. When the electrical box 200 is assembled to the side of the main body 100 of the cutting device 50, the first wiring port 213 and the second wiring port 146 are facing each other, which facilitates the wiring between the electrical box 200 and the main body 100 of the cutting device 50.

[0126] In some embodiments, condensation may occur on the refrigerant lines 110, 120, and 130 as the refrigerant flows through them. To address this issue, refer to... Figure 6 , Figures 13 to 16 In this embodiment, a heat insulation part 300 is provided inside the shell 140. The heat insulation part 300 can be a foam component or the like. The heat insulation part 300 wraps the first cut-off pipe 110, the second cut-off pipe 120, and the pressure relief pipe 130 to prevent condensation from forming on these pipes.

[0127] The insulation part 300 is placed in the inner cavity of the housing 140 and is adapted to the inner cavity of the housing 140. That is, the insulation part 300 is fixed in the inner cavity of the housing 140. In this way, the insulation part 300 not only serves to insulate the refrigerant pipeline, but also serves to fix the refrigerant pipeline.

[0128] In some embodiments, the insulation part 300 has a groove structure configured for the first cut-off pipe 110, the second cut-off pipe 120, and the pressure relief pipe 130 to run through it. The first cut-off pipe 110, the second cut-off pipe 120, and the pressure relief pipe 130 run through the groove structure, thereby enclosing the first cut-off pipe 110, the second cut-off pipe 120, and the pressure relief pipe 130 by the insulation part 300, and also limiting these pipes.

[0129] In some embodiments, continue to refer to Figures 13 to 16 The insulation part 300 includes an insulation main body part 310 and an insulation cover plate part 320. The insulation main body part 310 is provided with a groove structure, and the insulation cover plate part 320 is connected to the insulation main body part 310 to cover the groove structure.

[0130] A groove structure is excavated at the corresponding position of the insulation main body 310. The groove structure is a recessed structure with an open side to facilitate the installation of the first cut-off pipe 110, the second cut-off pipe 120, and the pressure relief pipe 130. Then, the insulation cover plate 320 is installed on the insulation main body 310 to seal the open side of the groove structure. In other words, the first cut-off pipe 110, the second cut-off pipe 120, and the pressure relief pipe 130 are confined to the corresponding groove structure, thereby achieving all-round wrapping and confinement of these refrigerant pipes.

[0131] The separate design of the insulation main body 310 and the insulation cover plate 320 facilitates the installation of refrigerant pipelines and achieves all-round wrapping and limiting of the refrigerant pipelines.

[0132] In some embodiments, the groove structure is provided on two opposite outer surfaces of the insulation main body 310. Specifically, a first groove structure 311 is provided on one side of the insulation main body 310, and a first cut-off pipe 110 is provided in the first groove structure 311. A second groove structure 312 is provided on the opposite side of the insulation main body 310, and a second cut-off pipe 120 is provided in the second groove structure 312. A third groove structure 313 is provided between the first groove structure 311 and the second groove structure 312, and a pressure relief pipe 130 is provided in the third groove structure 313.

[0133] By providing the first groove structure 311 and the second groove structure 312 on two opposite sides of the insulation main body 310 to separate the first cut-off pipe 110 and the second cut-off pipe 120, on the one hand, heat exchange between the two refrigerants can be effectively avoided when refrigerant flows in the first cut-off pipe 110 and the second cut-off pipe 120; on the other hand, it is convenient to install the first cut-off pipe 110 and the second cut-off pipe 120 from different sides of the insulation main body 310. In addition, there are two insulation cover plates 320, one of which is configured to cover the first groove structure 311, and the other of which is configured to cover the second groove structure 312, so as to reliably wrap and limit the first cut-off pipe 110 and the second cut-off pipe 120.

[0134] The pressure relief pipe 130 runs from the top of the insulation body 310, which facilitates the installation of the pressure relief pipe 130.

[0135] In some embodiments, the housing 140 includes a housing body 141 and a cover 142, with a heat insulation portion 300 disposed inside the housing body 141 and the cover 142 disposed on the top of the housing body 141.

[0136] The first switch 114, the second switch 124, and the pressure relief valve 131 protrude from the top of the insulation body 310, and the two ends of the first cut-off pipe 110 and the two ends of the second cut-off pipe 120 extend from the side of the insulation body 310. Pipe openings 145 are respectively provided on opposite sides of the shell body 141, and the two ends of the first cut-off pipe 110 and the two ends of the second cut-off pipe 120 extend from the corresponding pipe openings 145.

[0137] In some embodiments, both ends of the first cut-off pipe 110 and the second cut-off pipe 120 pass through the pipe opening 145, and an insulation section 150 is fitted onto the pipe section of the first cut-off pipe 110 and the second cut-off pipe 120 passing through the pipe opening 145. Figure 9 As shown. Most of the pipe sections of the first cut-off pipe 110 and the second cut-off pipe 120 are located within the insulation section 300, while the portions extending beyond the insulation section 300 are wrapped with the insulation section 150. On the one hand, this insulates the extended portions at the ends to prevent condensation; on the other hand, the insulation section 150 is located within the pipe opening 145 to prevent the extended portions of the first cut-off pipe 110 and the second cut-off pipe 120 from being forcibly disconnected from the pipe opening 145, thus providing pipe protection.

[0138] In some embodiments, refer to Figure 7 and Figure 8 The shell body 141 has end plates 143 at its opposite ends. The height of the end plates 143 is lower than the height of the shell body. The top of the end plates 143 has a first notch 1431.

[0139] A side plate 144 is provided above the end plate 143. A second notch 1441 is provided at the bottom of the side plate 144. The first notch 1431 and the second notch 1441 are directly opposite each other to form a pipe opening 145 for the first cut-off pipe 110 and the second cut-off pipe 120 to run through.

[0140] During installation, the side plate 144 and the cover 142 are not installed first. The insulation part 300, together with the cut-off pipe and the pressure relief pipe 130, is inserted into the shell body 141. At this time, the protruding ends of the first cut-off pipe 110 and the second cut-off pipe 120 fall from top to bottom to the first notch 1431 and abut in place. Then, the side plate 144 is installed, with the first notch 1431 and the second notch 1441 facing each other vertically, thereby limiting the protruding ends of the first cut-off pipe 110 and the second cut-off pipe 120. Finally, the cover 142 is installed.

[0141] In some embodiments, the side plate 144 is provided with a connecting portion 147, through which the main body 100 of the cutting device 50 is installed to the desired installation position. The connecting portion 147 can be a hook or other structural form, and this embodiment does not impose specific limitations.

[0142] In some embodiments, the first cut-off pipe 110 and the second cut-off pipe 120 are bent along the insulation body 310. That is, the first cut-off pipe 110 and the second cut-off pipe 120 have a bent structure, and correspondingly, the first groove structure 311 and the second groove structure 312 are also bent groove structures. The first cut-off pipe 110 is bent along the first groove structure 311, and the second cut-off pipe 120 is bent along the second groove structure 312.

[0143] The first cut-off conduit 110 has a Z-shaped structure, including a first cut-off conduit section 111, a first cut-off conduit section 112, and a first cut-off conduit section 113 connected sequentially. The first cut-off conduit section 112 connects the height distance between the first cut-off conduit section 111 and the first cut-off conduit section 113. The first cut-off conduit section 111 and the first cut-off conduit section 113 extend horizontally, while the first cut-off conduit section 112 extends vertically. A first switch element 114 is located at the bend intersection of the first cut-off conduit section 112 and the first cut-off conduit section 113, so that the first switch element 114 can be installed facing upwards and exposed from the top of the insulation body 310. A first filter 115 is provided on the first cut-off conduit section 111 and the first cut-off conduit section 113 respectively.

[0144] The second cut-off conduit 120 also has a Z-shaped structure, including a second cut-off conduit section 121, a second cut-off conduit section 122, and a second cut-off conduit section 123 connected in sequence. The second cut-off conduit section 122 connects the height distance between the second cut-off conduit section 121 and the second cut-off conduit section 123. The second cut-off conduit section 121 and the second cut-off conduit section 123 extend horizontally, while the second cut-off conduit section 122 extends vertically. The second switch element 124 is located at the bend intersection of the second cut-off conduit section 122 and the second cut-off conduit section 123, so that the second switch element 124 can be installed facing upwards and exposed from the top of the insulation body 310. The second cut-off conduit section 121 and the second cut-off conduit section 123 are respectively provided with second filters 125.

[0145] The bent pipe routing structure of the first cut-off pipe 110 and the second cut-off pipe 120, on the one hand, allows the first switch 114 and the second switch 124 to be exposed from the top of the insulation body 310; on the other hand, it also helps to improve the stability of the first cut-off pipe 110 and the second cut-off pipe 120 within the insulation part 300, and prevents the first cut-off pipe 110 and the second cut-off pipe 120 from moving left and right or up and down within the insulation part 300.

[0146] In some embodiments, the pressure relief line 130 is connected between the first cut-off line 110 and the second cut-off line 120 in a bent structure, and the first cut-off line 110 and the second cut-off line 120 form a routing area configured for the pressure relief line 130 to bend and run.

[0147] Specifically, a conduit area for the pressure relief conduit 130 is formed above the first cut-off conduit section 111 and the second cut-off conduit section 121. Correspondingly, the insulation body has a third groove structure 313 configured to accommodate the bent conduit section of the pressure relief conduit 130. The third groove structure 313 is located on the same side as the first groove structure 311 and communicates with the first groove structure 311. A portion of the pressure relief conduit 130 is accommodated in the third groove structure 313, while another portion runs from above the insulation body 310 to extend to the other side of the insulation body 310 to connect with the second cut-off conduit 120.

[0148] In some embodiments, the installation process of the cutting-off device 50 is as follows:

[0149] Assemble the first cut-off pipe 110, the second cut-off pipe 120, and the pressure relief pipe 130 to form a pipe assembly;

[0150] Install the piping assembly onto the insulation main body 310 from top to bottom;

[0151] Install the insulation cover plate 320 onto the left and right sides of the insulation body 310 to limit the pipeline assembly onto the insulation body 310;

[0152] The insulation part 300, together with the pipeline assembly, is installed into the shell body 141. The protruding ends of the first cut-off pipeline 110 and the second cut-off pipeline 120 fall from top to bottom to the top of the first notch 1431 of the end plates 143 on the left and right sides of the shell body 141.

[0153] The side plate 144 is installed on the end plate 143. The second notch 1441 at the bottom of the side plate 144 is directly opposite to the first notch 1431 on the corresponding side, so as to limit the end protruding parts of the first cut-off pipe 110 and the second cut-off pipe 120.

[0154] Install the cover 142 onto the top of the shell body 141;

[0155] Install the electrical box 200 onto the side of the housing body 141.

[0156] In one or more embodiments of this application, the ventilation device 70 may be a fresh air device, an air purifier, a total heat exchanger, an air circulation fan, or a combination of several of these.

[0157] like Figure 29As shown, in one or more embodiments of this application, the alarm device 60 includes a housing 64 and a control unit, the control unit including a processor, a memory, and other components. The processor implements various functions by executing programs in the memory. A reset button 65 is provided on the housing 64, and the reset button 65 is electrically connected to the control unit. The alarm device 60 can be fixedly installed on a wall.

[0158] In one or more embodiments of this application, multiple alarm devices 60 may be provided.

[0159] In one or more embodiments of this application, the alarm device 60 includes a first luminous alarm 62. The first alarm 62 may be a light-emitting diode or a combination of light-emitting diodes; it may also be an electroluminescent lamp. The first alarm 62 is electrically connected to the control unit.

[0160] In one or more embodiments of this application, when the interval light warning condition is met, the first alarm 62 emits an interval warning light signal. The interval light warning condition is that the detection value of the refrigerant gas concentration sensor 61 is higher than a first threshold (e.g., A). ppm The first threshold corresponds to a relatively low concentration state. The interval warning light signal illuminates the first alarm 62, turns it off after a set light output time from the moment it is illuminated, and illuminates it again after a set light stop time from the moment it is turned off.

[0161] For example, such as Figure 27 As shown, when the interval light warning condition is met, at the beginning time t 00 The first alarm 62 is activated by emitting an intermittent warning light signal, and the first alarm 62 illuminates. The first alarm 62 automatically... 00 From a certain time, after the set light output time T ON_light All remain lit, and in T ON_light The end time t 01 The first alarm 62 is turned off, and the first alarm 62 automatically turns off. 01 From a given time T, the lights will stop. OFF_light All remain off, and at T OFF_light The end time t 02 The first alarm 62 is activated again. When the interval light warning condition is met, the first alarm 62 activates according to t... 00 To t 02 The work pattern is cyclical and operates within specific time periods.

[0162] In one or more embodiments of this application, when the interval light warning condition is met, as the detection value of the refrigerant gas concentration sensor 61 increases, the set light output time and / or the set light stop time is shortened.

[0163] In one or more embodiments of this application, when the detection value of the refrigerant gas concentration sensor 61 is higher than a first threshold, at the start time t 00 The first alarm 62 is activated by emitting an intermittent warning light signal, and the first alarm 62 illuminates. The first alarm 62 automatically... 00 From a certain time, after the set light output time T ON_light All remain lit, and in T ON_light The end time t 01 The first alarm 62 is turned off, and the first alarm 62 automatically turns off. 01 From a given time T, the lights will stop. OFF_light All remain off, and at T OFF_light The end time t 02 This will reactivate the first alarm 62. During this process, T... OFF_light The time is 2 seconds. The optocoupler output remains disconnected, and the cutoff device 50 does not operate. Under the condition of cyclically executing the above operating mode, if the detection value of the refrigerant gas concentration sensor 61 rises and exceeds the second threshold (the second threshold is higher than the first threshold), the operating mode of the first alarm 62 changes to: at the beginning time t 00 The first alarm 62 is activated by emitting an intermittent warning light signal, and the first alarm 62 illuminates. The first alarm 62 automatically... 00 From a certain time, after the set light output time T ON_light All remain lit, and in T ON_light The end time t 01 The first alarm 62 is turned off, and the first alarm 62 automatically turns off. 01 From a given time T, the lights will stop. OFF_light All remain off, and at T OFF_light The end time t 02 This will reactivate the first alarm 62. During this process, T... OFF_light Since 2s is shortened to 1s, T ON_light It remains unchanged.

[0164] In one or more embodiments of this application, T may also be used. ON_light Since 2s was changed to 1s, T OFF_light It remains unchanged.

[0165] In one or more embodiments of this application, T may also be used simultaneously. OFF_light and T ON_light The time was changed from 2 seconds to 1 second.

[0166] In one or more embodiments of this application, the set light stop time and / or set light output time can be shortened at a set rate based on the change in the value detected by the refrigerant gas concentration sensor 61. That is, when the concentration value detected by the refrigerant gas concentration sensor 61 changes, the set light stop time can be reduced at a certain rate according to the magnitude of this change, increasing the lighting frequency of the first alarm 62. This allows the first alarm 62 to more clearly and intuitively display the risk level and the changes in risk. When the flashing frequency exceeds the critical flashing frequency, the first alarm 62 can be considered to be issuing a continuous warning signal, reminding the user that the risk level is high.

[0167] In one or more embodiments of this application, the alarm device 60 includes a second alarm 63 capable of emitting sound. The second alarm 63 may be a buzzer or a speaker; it may also be a combination of a buzzer and a speaker.

[0168] In one or more embodiments of this application, the second alarm 63 emits an intermittent alarm sound signal when an intermittent audible warning condition is met. The intermittent audible warning condition is that the detection value of the refrigerant gas concentration sensor 61 is higher than a second threshold (e.g., B). ppm The second threshold corresponds to a relatively high concentration state. The interval warning sound signal causes the second alarm 63 to sound, and after a set sound output time elapses from the moment it sounds, the second alarm 63 is turned off, and after a set sound stop time elapses from the moment it is turned off, the second alarm 63 sounds again.

[0169] For example, such as Figure 27 As shown, when the interval sound warning condition is met, at the beginning time t 10 The second alarm 63 emits an intermittent warning sound signal and sounds. The first alarm 62 automatically... 10 From a given moment, after a set sound output time T ON_sound All remained vocal and at T ON_light The end time t 11 The first alarm 62 is turned off, and the first alarm 62 automatically turns off. 11 From a given moment, after the set sound stop time T OFF_sound All remain off, and at T OFF_sound The end time t 12 The first alarm 62 is triggered to sound again. When the interval sound warning condition is met, the first alarm 62, according to t... 10 To t 12 The work pattern is cyclical and operates within specific time periods.

[0170] In one or more embodiments of this application, the alarm device 60 generates a leakage warning message when the interval audible warning condition is met, and the optocoupler output remains closed. Upon receiving the leakage warning message, the shut-off device 50 and the ventilation device 70 activate.

[0171] In one or more embodiments of this application, when the interval sound warning condition is met, the sound stop time is shortened as the detection value of the refrigerant gas concentration sensor 61 increases.

[0172] In one or more embodiments of this application, when the detection value of the refrigerant gas concentration sensor 61 is higher than the second threshold, at the start time t 10 The first alarm 62 emits an intermittent warning sound signal, and the first alarm 62 sounds. The first alarm 62 automatically... 10 From a given moment, after a set sound output time T ON_sound All remained vocal and at T ON_sound The end time t 11 The first alarm 62 is turned off, and the first alarm 62 automatically turns off. 11 From a given moment, after the set sound stop time T OFF_sound All remain off, and at T OFF_sound The end time t 12 This causes the first alarm 62 to sound again. During this process, T... OFF_sound The time is 1 second. Under the condition of cyclically executing the above working mode, if the detected value of the refrigerant gas concentration sensor 61 continues to rise, the working mode of the first alarm 62 changes to: based on the change in the detected value of the refrigerant gas concentration sensor 61, the set sound stop time is shortened at a set rate. That is, when the concentration value detected by the refrigerant gas concentration sensor 61 changes, the set sound stop time can be reduced at a certain rate according to the magnitude of this change, increasing the sound frequency of the first alarm 62, thereby allowing the first alarm 62 to more clearly and intuitively display the risk level and the change in risk.

[0173] In one or more embodiments of this application, when the alarm cancellation condition is met, the first alarm 62 stops emitting the interval warning light signal, and the second alarm 63 stops emitting the interval warning sound signal; the alarm cancellation condition is that the detection value of the refrigerant gas concentration sensor 61 is lower than the third threshold within a set time period and an active cancellation trigger signal is received; the third threshold is higher than the first threshold but lower than the second threshold.

[0174] When the first alarm 62 and the second alarm 63 are operating in the above-described cyclic mode, if the detection value of the refrigerant gas concentration sensor 61 is within the set time period t... sIf the internal temperature drops below the third threshold and a proactive de-triggered signal is received, the warning de-escalation condition is considered met. For example, t s The trigger signal can be set to be pressed continuously for more than 3 seconds, and the active release trigger signal can be set to be pressed continuously for more than 3 seconds, using the reset button 65 located on the housing of the alarm device 60.

[0175] In one or more embodiments of this application, when the continuous warning condition is met, the first alarm 62 emits a continuous warning light signal and the second alarm 63 emits a continuous warning sound signal.

[0176] In one or more embodiments of this application, the continuous warning condition is: within a set determination period after the interval sound warning condition is met, the warning cancellation condition is not met. For example, in t... 10 When the time-interval audible warning condition is met, within the following M seconds, the first alarm 62 emits an interval warning light signal, the second alarm 63 emits an interval warning audible signal, and the alarm device 60 generates a leak warning message. Upon receiving the leak warning message, the shut-off device 50 and the ventilation device 70 activate. If the shut-off device 50 and the ventilation device 70 operate normally, the refrigerant gas temperature sensor reading will decrease and remain at a safe level, such as the third threshold C. ppm Satisfying A ppm <C ppm <B ppm The alarm device 60 simultaneously determines whether an active release trigger signal has been received. This active release trigger signal is generated manually, for example, by a maintenance personnel manually and continuously pressing the reset button 65 on the alarm device 60 housing for more than 3 seconds, or by a user manually and continuously pressing the reset button 65 on the alarm device 60 housing for more than 3 seconds under remote guidance. This indicates that someone has noticed the safety hazard. M seconds is the working time set based on the operation of the shut-off device 50 and the ventilation device 70. If the alarm release condition is not met within the set judgment period (e.g., within N seconds) after the shut-off device 50 and the ventilation device 70 have been operating for M seconds, it indicates that the refrigerant gas temperature sensor's detection value has not decreased at the ideal level, and there is a risk of malfunction in the shut-off device 50 and the ventilation device 70, or that no one has noticed the safety hazard of refrigerant leakage. In this case, the first alarm 62 changes to emitting a continuous warning light signal, and the second alarm 63 emits a continuous warning sound signal, increasing the warning level.

[0177] In one or more embodiments of this application, the continuous warning condition is: within a set judgment period after the interval sound warning condition is met, the warning cancellation condition is met, but after the warning cancellation condition is met, the interval sound warning condition is met again. When the active cancellation trigger signal is received, the refrigerant gas temperature sensor detection value is still greater than A. ppmIf the interval light warning condition is met, the first alarm 62 will emit an interval warning light signal, the second alarm 63 will be turned off, and the alarm device 60 will stop generating leakage warning information. The shut-off ventilation measures of the shut-off device 50 and the ventilation device 70 will also cease execution. If the interval sound warning condition is met again within the set judgment period after the warning cancellation condition is met (e.g., ... Figure 28 If the leak is not resolved and the shut-off device 50 and ventilation device 70 cannot resolve the leak, then the first alarm 62 and the second alarm 63 will issue continuous warning light signals and continuous warning sound signals respectively to raise the warning level. In this case, manual intervention is required.

[0178] In one or more embodiments of this application, the air conditioning system can perform a first self-test operation. During the first self-test operation, the first alarm 62 emits a first interval self-test light signal; the first interval self-test light signal causes the first alarm 62 to light up, and after a first set light self-test output time elapses from the moment it lights up, the first alarm 62 is turned off, and after a first set light self-test stop time elapses from the moment it is turned off, the first alarm 62 is turned on again; a leakage warning message is generated, which continues until the end of the first self-test cycle.

[0179] In one or more embodiments of this application, the air conditioning system may perform a second self-test operation. During the second self-test operation, the first alarm 62 emits a second interval self-test light signal; the second interval self-test light signal illuminates the first alarm 62, and after a second preset light self-test output time elapses from the moment it illuminates, the first alarm 62 is turned off, and after a second preset light self-test stop time elapses from the moment it is turned off, the first alarm 62 is illuminated again, generating a leakage warning message, which continues until the end of the second self-test cycle.

[0180] In one or more embodiments of this application, when the air conditioning system performs the first self-test operation and the second self-test operation, the second alarm 63 emits an intermittent self-test sound signal; the intermittent self-test sound signal causes the second alarm 63 to sound, and after a set sound self-test output time from the moment of sounding, the second alarm 63 is turned off, and after a set sound self-test stop time from the moment of turning off, the second alarm 63 sounds again, continuing until the end of the first self-test cycle.

[0181] In one or more embodiments of this application, the first self-test operation can be initiated by a reset button 65 provided on the alarm device 60. For example, the first self-test operation is performed when the reset button 65 generates a signal for more than 3 seconds.

[0182] In one or more embodiments of this application, the second self-test operation can be initiated by double-clicking the reset button 65 located on the alarm device 60.

[0183] In one or more embodiments of this application, when the interval light warning condition, the interval sound warning condition, or the continuous warning condition is met, the first self-test operation is disabled, that is, the priority of the interval light warning condition, the interval sound warning condition, or the continuous warning condition is presumed to be higher than the priority of the first self-test operation.

[0184] In one or more embodiments of this application, the second self-test operation is disabled when the interval light warning condition, the interval sound warning condition, or the continuous warning condition is met. That is, the priority of the interval light warning condition, the interval sound warning condition, or the continuous warning condition is assumed to be higher than the priority of the second self-test operation.

[0185] When the first alarm 62 includes multiple LEDs, the first interval self-test light signal and the interval warning light signal can be implemented by different LEDs, such as LEDs of different colors. The first self-test cycle can be set to 6 seconds.

[0186] When the first alarm 62 includes multiple LEDs, the second interval self-test light signal and the interval warning light signal can be implemented by different LEDs, such as LEDs of different colors. The second self-test cycle is several times longer than the first self-test cycle, and the second self-test cycle can be set to 80 seconds.

[0187] The first self-test operation can be used to initially check the linkage of the air conditioning system, whether the communication between the alarm device 60, indoor unit, outdoor unit, shut-off device 50, and ventilation device 70 is normal, and whether the first alarm 62 and the second alarm 63 are working properly. The second self-test operation can be used to check whether the refrigerant has been properly recovered through the shut-off device 50.

[0188] When powered on, the alarm device 60 can be configured to perform a self-test once per self-test cycle. If there is no fault and no alarm, the first alarm 62 displays a normal self-test light signal. When the first alarm 62 includes multiple LEDs, the normal self-test light signal can be achieved by LEDs of different colors. If a fault exists, the first alarm 62 outputs a fault self-test light signal. The form of the fault self-test light signal is not limited here.

[0189] In one or more embodiments of this application, the air conditioning system is further configured to, during the normal startup phase, display a startup light signal on a first alarm 62 and establish a communication connection between the alarm device 60, the indoor unit, the outdoor unit, the shut-off device 50, and the ventilation device 70. If a fault occurs during the startup phase, while maintaining the communication connection between the alarm device 60, the indoor unit, the outdoor unit, the shut-off device 50, and the ventilation device 70, an intervention signal is generated to drive the shut-off device 50 to actuate, preventing refrigerant leakage during the startup phase. Simultaneously, the first alarm 62 and the second alarm 63 continue to display fault indication signals until the fault is resolved or the device is repaired or replaced.

[0190] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. Air conditioning system, including: Indoor unit; Outdoor unit, which includes a compressor; Its characteristic is that it further includes: An alarm device, including a refrigerant gas concentration sensor, is configured to issue an alarm and generate a leak warning message based on the measured refrigerant gas concentration. A ventilation device configured to receive the leak warning information and circulate indoor and outdoor air for ventilation; and Cut-off device, comprising: The first cut-off pipe, which is connected to the first refrigerant pipe between the indoor unit and the outdoor unit, is configured to close or open the first refrigerant pipe. The second shut-off pipe, connected to the second refrigerant pipe between the indoor unit and the outdoor unit, is configured to either close or open the second refrigerant pipe; and A pressure relief pipeline is connected between the first cut-off pipeline and the second cut-off pipeline, and a pressure relief valve is provided on it; The shut-off device is configured to receive the leakage warning information, close one of the first shut-off pipeline and the second shut-off pipeline and open the other to transport refrigerant from one of the indoor unit and the outdoor unit to the other, and drive the pressure relief valve to open the pressure relief pipeline to lead the high-pressure refrigerant to the compressor for pressure relief protection.

2. The air conditioning system according to claim 1, characterized in that: The alarm device includes a first luminous alarm. When the interval light warning condition is met, the first alarm emits an interval warning light signal; wherein, the interval light warning condition is that the detection value of the refrigerant gas concentration sensor is higher than a first threshold; the interval warning light signal is to light up the first alarm, turn off the first alarm after a set light output time from the moment of lighting, and light up the first alarm again after a set light stop time from the moment of turning off; when the interval light warning condition is met, as the detection value of the refrigerant gas concentration sensor increases, the set light output time and / or the set light stop time are shortened.

3. The air conditioning system according to claim 2, characterized in that: The alarm device includes a second audible alarm. When the interval sound warning condition is met, the second alarm will emit an interval warning sound signal; wherein, the interval sound warning condition is that the detection value of the refrigerant gas concentration sensor is higher than the second threshold; the interval warning sound signal is to make the second alarm sound, and after a set sound output time elapses from the time of sounding, the second alarm will turn off, and after a set sound stop time elapses from the time of turning off, the second alarm will sound again. When the interval sound warning condition is met, the alarm device generates a leakage warning message; The second threshold is higher than the first threshold.

4. The air conditioning system according to claim 3, characterized in that: When the interval sound warning condition is met, as the detection value of the refrigerant gas concentration sensor increases, the set sound output time and / or the set sound stop time are shortened.

5. The air conditioning system according to claim 3, characterized in that: When the conditions for de-alarming are met, the first alarm stops emitting interval warning light signals, and the second alarm stops emitting interval warning sound signals; the conditions for de-alarming are that the detection value of the refrigerant gas concentration sensor is lower than the third threshold within a set time period and an active de-alarming trigger signal is received. The third threshold is higher than the first threshold, but lower than the second threshold.

6. The air conditioning system according to claim 5, characterized in that: When the continuous warning condition is met, the first alarm will emit a continuous warning light signal, and the second alarm will emit a continuous warning sound signal; the continuous warning condition is: During the set judgment period after the interval sound warning condition is met, the warning cancellation condition is not met; and / or Within the set judgment period after the interval sound warning condition is met, the warning cancellation condition is met, but after the warning cancellation condition is met, the interval sound warning condition is met again.

7. The air conditioning system according to claim 6, characterized in that: When performing the first self-test operation, the first alarm emits a first interval self-test light signal; the first interval self-test light signal causes the first alarm to light up, and after a first set light self-test output time from the moment it lights up, the first alarm is turned off, and after a first set light self-test stop time from the moment it is turned off, the first alarm is turned on again, and this continues until the end of the first self-test cycle.

8. The air conditioning system according to claim 7, characterized in that: When performing the second self-test operation, the first alarm emits a second interval self-test light signal; the second interval self-test light signal turns on the first alarm, turns off the first alarm after a second set light self-test output time from the moment it turns on, and turns on the first alarm again after a second set light self-test stop time from the moment it turns off, generating a leakage warning message, which continues until the end of the second self-test cycle. The duration of the second self-test cycle is several times that of the first self-test cycle.

9. The air conditioning system according to claim 8, characterized in that: During the execution of the first and second self-test operations, leakage warning information is generated until the end of the first self-test cycle.

10. The air conditioning system according to claim 8, characterized in that: During the execution of the first self-test operation and the second self-test operation, the second alarm emits an interval self-test sound signal; the interval self-test sound signal causes the second alarm to sound, and after a set sound self-test output time from the moment of sounding, the second alarm is turned off, and after a set sound self-test stop time from the moment of turning off, the second alarm sounds again, continuing until the end of the first self-test cycle.

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