Ball valve assembly and air conditioning unit

Abstract

The utility model provides a kind of ball valve assembly and air conditioning unit.The ball valve assembly includes valve body;Valve ball;Valve stem;Valve core.The ball valve assembly and air conditioning unit provided by the utility model, by setting pressure relief passage on valve stem, the installation space of valve ball is communicated with the outside of valve body, the pressure generated in the installation space of valve ball inside and valve ball is discharged from valve ball by the control of valve core, thereby effectively avoid the problem of valve ball, valve body reliability caused by the internal pressure of valve ball being too high, improve the safety of ball valve;Controllable pressure relief is carried out to pressure relief passage using valve core, while ensuring the pressure in valve ball is relieved, the refrigerant discharged in pressure relief passage can be recycled using duct structure and pressure relief passage, reduce refrigerant waste and environmental pollution, improve the economy and environmental protection of system.

Description

Technical Field

[0001] This utility model relates to the field of pipeline structure technology, and in particular to a ball valve assembly and an air conditioning unit. Background Technology

[0002] Ball valves are common fluid control devices widely used in refrigeration equipment such as air conditioning systems. Their basic principle is to open or close the flow channel by rotating the valve ball, offering advantages such as good sealing performance and ease of operation. Typically, ball valves employ sealing structures on both sides of the valve ball to improve sealing performance, ensuring good airtightness even under high pressure or low temperature environments.

[0003] However, in practical applications, especially in air conditioning units, there are certain safety hazards when ball valves are used to seal pipelines containing liquid refrigerant. Specifically, after the ball valve is closed, liquid refrigerant may remain inside the valve ball. Due to the physical properties of refrigerant, its pressure-temperature relationship is non-linear. When the ambient temperature changes or heat is conducted to the valve body during welding, the pressure of the liquid refrigerant inside the valve ball, as well as the pressure of the liquid refrigerant sealed between the valve ball and the valve body by the sealing structure, will rise rapidly. Since the inside of the valve ball is completely sealed by the valve body, and the space between the valve ball and the valve body is completely sealed by the sealing structure, the pressure rise at this time can cause the valve ball or valve body to bulge, leak, or even burst, seriously affecting the safety and service life of the equipment. Utility Model Content

[0004] To address the technical problem of refrigerant pressure rising inside the ball of a ball valve, causing damage to the valve in existing technologies, a ball valve assembly and air conditioning unit are provided that features a pressure relief channel on the valve stem to relieve pressure inside the ball and improve safety.

[0005] A ball valve assembly, comprising:

[0006] The valve body has a first connecting channel and a second connecting channel, and an installation space is formed between the first connecting channel and the second connecting channel;

[0007] A valve ball, which is rotatably disposed within the mounting space;

[0008] A valve stem is rotatably mounted on the valve body, with its first end fixedly connected to the valve ball and its second end located outside the valve body. The valve stem is capable of driving the valve ball to rotate.

[0009] The valve core has a pressure relief channel on the valve stem. The installation space is connected to the outside of the valve body through the pressure relief channel. The valve core is disposed in the pressure relief channel and has a pressure relief state when the pressure relief channel is open and a closed state when the pressure relief channel is closed.

[0010] The valve core includes a control part and a blocking part. The blocking part is movably disposed in the pressure relief channel. When the valve core is in the pressure relief state, the blocking part opens the pressure relief channel. When the valve core is in the closed state, the blocking part blocks the pressure relief channel. The control part is connected to the blocking part and is exposed to the outside of the valve stem.

[0011] The end of the control unit that communicates with the outside through the pressure relief channel is exposed to the outside of the valve stem.

[0012] The ball valve assembly also includes a valve cap, which is detachably mounted on the valve stem and is capable of closing the pressure relief passage.

[0013] The ball valve assembly also includes a pressure detection mechanism and a control mechanism. The pressure detection mechanism is disposed inside the valve cap and can obtain the pressure value in the installation space. The pressure detection mechanism is electrically connected to the control mechanism, and the control mechanism can coordinate with other mechanisms to control based on the pressure value detected by the pressure detection mechanism.

[0014] The ball valve assembly also includes a connecting pipe, and the valve stem or the valve body is provided with a quick-release structure. The connecting pipe can be connected to the valve stem through the quick-release structure, and the connecting pipe can be connected to the pressure relief channel.

[0015] An external thread is provided on the outer surface of the valve stem or the outer surface of the valve body, and the external thread constitutes the quick-release structure.

[0016] A sealing structure is provided at the connection position between the installation space and the first connecting channel, and at the connection position between the installation space and the second connecting channel, and the sealing structure is sealed in conjunction with the valve ball.

[0017] The sealing structure is annular in shape, and the valve ball is provided with a first connecting hole. The valve ball has a connected state in which the first connecting channel and the second connecting channel are connected to each other through the first connecting hole, and a closed state in which the first connecting channel and the second connecting channel are separated. When the valve ball is in the connected state, the first connecting hole is connected to the first connecting channel and the second connecting channel through the sealing structure.

[0018] An air conditioning unit includes the ball valve assembly described above.

[0019] The ball valve assembly and air conditioning unit provided by this utility model, by setting a pressure relief channel on the valve stem, connects the installation space where the valve ball is located with the outside of the valve body. The pressure generated inside the valve ball and in the installation space where the valve ball is located is discharged from the valve ball through the control of the valve core, thereby effectively avoiding the reliability problems of the valve ball and valve body caused by excessive internal pressure of the valve ball, and improving the safety of the ball valve. The pressure relief channel is controlled by the valve core. While ensuring the pressure inside the valve ball is relieved, the refrigerant discharged in the pressure relief channel can be recovered by connecting the conduit and other structures to the pressure relief channel. Moreover, when the valve ball connects the first connecting channel and the second connecting channel, the pressure relief channel is also connected. At this time, the refrigerant leaking into the gap between the valve ball and the installation space can be depressurized and recovered, reducing refrigerant waste and environmental pollution, and improving the economy and environmental protection of the system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a ball valve in the prior art;

[0021] Figure 2 A schematic diagram of the ball valve assembly provided in an embodiment of the present utility model, showing the valve ball in a connected state;

[0022] Figure 3 for Figure 2 A partial schematic diagram of point A;

[0023] Figure 4 An exploded view of the ball valve assembly provided in an embodiment of this utility model;

[0024] Figure 5 A schematic diagram of the valve core of the ball valve assembly provided in this embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the ball valve assembly provided in an embodiment of the present utility model, showing the valve ball in a closed state;

[0026] Figure 7 This is a schematic diagram of the appearance of the ball valve assembly provided in an embodiment of the present utility model;

[0027] In the picture:

[0028] 1. Valve body; 11. First connecting channel; 12. Second connecting channel; 2. Valve ball; 3. Valve stem; 31. Pressure relief channel; 4. Valve core; 41. Control unit; 42. Sealing unit; 311. Narrowing section; 312. Connecting section; 5. Valve cap; 6. Sealing structure; 21. First connecting hole. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" 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 direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In practical applications, especially in air conditioning units, ball valves pose certain safety hazards when used to seal pipelines containing liquid refrigerant. Specifically, after the ball valve is closed, liquid refrigerant may remain inside the valve ball. Due to the physical properties of refrigerant, its pressure-temperature relationship is non-linear. When the ambient temperature changes or heat is conducted to the valve body during welding, the pressure of the liquid refrigerant inside the valve ball, as well as the pressure of the liquid refrigerant sealed between the valve ball and the valve body by the sealing structure, will rise rapidly. Since the inside of the valve ball is completely sealed by the valve body, and the space between the valve ball and the valve body is completely sealed by the sealing structure, this pressure rise can cause the valve ball or valve body to bulge, leak, or even burst, seriously affecting the safety and service life of the equipment.

[0035] Therefore, this application provides a method such as Figures 2 to 7 A ball valve assembly is shown, comprising: a valve body 1, wherein a first communicating channel 11 and a second communicating channel 12 are provided within the valve body 1, and an installation space is formed between the first communicating channel 11 and the second communicating channel 12; a valve ball 2, which is rotatably disposed within the installation space; a valve stem 3, which is rotatably disposed on the valve body 1, wherein a first end of the valve stem 3 is fixedly connected to the valve ball 2, and a second end of the valve stem 3 is located outside the valve body 1, and the valve stem 3 is capable of driving the valve ball 2 to rotate; and a valve core 4, wherein a pressure relief channel 31 is provided on the valve stem 3, the installation space is connected to the outside of the valve body 1 through the pressure relief channel 31, the valve core 4 is disposed within the pressure relief channel 31, and the valve core 4 has a pressure relief state of opening the pressure relief channel 31 and a closed state of closing the pressure relief channel 31.

[0036] By setting a pressure relief channel 31 on the valve stem 3, the installation space where the valve ball 2 is located is connected to the outside of the valve body 1. The pressure generated inside the valve ball 2 and in the installation space where the valve ball 2 is located is discharged from the valve ball 2 by the control of the valve core 4. This effectively avoids the reliability problems of the valve ball 2 and valve body 1 caused by excessive internal pressure of the valve ball 2, and improves the safety of the ball valve. The pressure relief channel 31 is controlled by the valve core 4. While ensuring the pressure inside the valve ball 2 is relieved, the refrigerant discharged in the pressure relief channel 31 can be recovered by connecting it with the conduit and other structures. Moreover, when the valve ball 2 connects the first connecting channel 11 and the second connecting channel 12, the pressure relief channel 31 is also connected. At this time, the refrigerant leaking into the gap between the valve ball 2 and the installation space can be depressurized and recovered, reducing refrigerant waste and environmental pollution, and improving the economy and environmental protection of the system.

[0037] The valve ball 2 is provided with a non-circular mounting hole, which is connected to the interior of the valve ball 2. The valve stem 3 is provided with a protruding structure that matches the shape of the non-circular mounting hole. The protruding structure can be inserted into the non-circular mounting hole, so that the rotation of the valve stem 3 can be transmitted to the valve ball 2, thereby realizing the rotation of the valve ball 2. The pressure relief channel 31 is connected to the interior of the valve ball 2 through the protruding structure and the non-circular mounting hole.

[0038] When this application is applied, if the pressure inside the valve ball 2 or in the assembly gap between the valve ball 2 and the installation space is too high, the valve core 4 can be manually operated. The pressure relief channel 31 is opened, and pressurized fluid (such as refrigerant) can be directly discharged from the pressure relief channel 31, thereby reducing the pressure inside the valve ball 2. In particular, when the ball valve assembly is closed, although the valve ball 2 cuts off the first connecting channel 11 and the second connecting channel 12, the channel on the valve ball 2 will be connected to the assembly gap between the valve ball 2 and the installation space. The fluid in the assembly gap can still release pressure to the valve ball 2 through the gap between the valve stem 3 and the valve ball 2, which can avoid the problem of excessive fluid pressure in the gap causing damage to the valve body 1 and ensure the structural reliability of the ball valve assembly.

[0039] In one embodiment, the valve core 4 includes a control part 41 and a blocking part 42. The blocking part 42 is movably disposed within the pressure relief channel 31. When the valve core 4 is in the pressure relief state, the blocking part 42 opens the pressure relief channel 31; when the valve core 4 is in the closed state, the blocking part 42 blocks the pressure relief channel 31. The control part 41 is connected to the blocking part 42 and is exposed outside the valve stem 3. The user can directly operate the blocking part through the control part 41 exposed outside the valve stem 3, that is, manually control the valve core 4. This ensures that there is a worker operating at the position of the ball valve assembly during the pressure relief process of the valve core 4, thereby allowing the fluid released from the pressure relief channel 31 to be recovered, reducing environmental pollution and improving the environmental friendliness of the equipment where the ball valve assembly is located.

[0040] Optionally, the pressure relief channel 31 has a constricted section 311 and a connecting section 312. The flow area of ​​the constricted section 311 is smaller than that of the connecting section 312. The area of ​​the sealing part 42 is larger than that of the constricted section 311 but smaller than that of the connecting section 312. The sealing part 42 can move within the connecting section 312. When the sealing part 42 needs to block the pressure relief channel 31, it moves towards the constricted section 311 and eventually reaches the connection position between the constricted section 311 and the connecting section 312, thereby blocking the constricted section 311. When the sealing part 42 needs to open the pressure relief channel 31, it moves away from the constricted section 311. At this time, the gap between the sealing part 42 and the connecting section 312 forms a channel through which fluid can flow. A threaded engagement structure is also provided on the valve stem 3, and a thread is provided on the control part 41. The control part 41 can drive the sealing part 42 to move through the engagement of the thread and the threaded engagement structure.

[0041] In one implementation, the control unit 41 is exposed outside the valve stem 3 at the end that communicates with the outside through the pressure relief channel 31. By placing the control unit 41 outside the valve stem 3, the operator can directly operate the sealing part 42 from the outside of the ball valve assembly, which also avoids accidental leakage caused by operating the sealing part 42 when no one is present, thus ensuring the environmental friendliness of the ball valve assembly and the equipment it is in.

[0042] like Figure 3 and Figure 5 As shown, the control part 41 is a pin, the sealing part 42 is a piston plate, and the valve core 4 also has a return spring for resetting the pin. The constricted section 311 is located on the side of the connecting section 312 away from the valve ball 2. The pin passes through the constricted section 311 and connects with the piston plate. When the pin is pressed down, the piston plate is driven to move downward. At this time, the connection between the constricted section 311 and the connecting section 312 is opened, and the valve core 4 switches to the pressure relief state. When the pressure on the pin is released, the return spring begins to return to its original state and drives the pin to move upward. The piston plate moves upward with the pin and seals the connection between the constricted section 311 and the connecting section 312. The valve core 4 switches to the closed state.

[0043] Furthermore, the ball valve assembly also includes a valve cap 5, which is detachably mounted on the valve stem 3 and can close the pressure relief passage 31. By further blocking the pressure relief passage 31 with the valve cap 5, the valve cap 5 can also shield the control unit 41, preventing operation of the control unit 41 at unnecessary times or by unauthorized personnel, thus ensuring the structural reliability of the ball valve assembly.

[0044] Existing technologies have serious shortcomings in real-time monitoring of the internal fluid pressure of ball valves. Current ball valves only achieve opening and closing control through mechanical structures, lacking the ability to dynamically monitor the internal pressure of the valve ball 2. This results in the system being unable to sense changes in the internal pressure of the valve body 1 in real time, and unable to provide timely feedback on the unit's operating status. Damage is only detected when the pressure accumulates to the point of causing damage to the ball valve, increasing the risk of equipment failure and potentially leading to more serious safety accidents due to delayed response. Therefore, the ball valve assembly described in this application also includes a pressure detection mechanism and a control mechanism. The pressure detection mechanism is located within the valve cap 5 and can acquire the pressure value within the installation space. The pressure detection mechanism is electrically connected to the control mechanism, which can coordinate with other mechanisms to control the valve based on the pressure value detected by the pressure detection mechanism. Utilizing the valve cap 5 to provide installation space for the pressure detection mechanism avoids further modifications to the structure of the valve body 1 or valve stem 3, reducing production costs. Simultaneously, the pressure detection mechanism detects the real-time pressure value inside the valve ball 2 and sends it to the control mechanism. The control mechanism then compares the real-time pressure value with the pressure threshold and issues an early warning or dynamically adjusts the system containing the ball valve assembly based on the comparison result, enabling intelligent management of the system containing the ball valve assembly.

[0045] Taking the application of ball valve assembly in air conditioning units as an example, the fluid inside the ball valve assembly is refrigerant. When the pressure detection mechanism detects that the refrigerant pressure inside the valve ball 2 exceeds the pressure threshold, the control mechanism can send the detection result to users, maintenance personnel, etc., or directly adjust the working status of the air conditioning unit through preset levels within the air conditioning unit, such as adjusting the working mode, adjusting the refrigerant pressure and / or flow rate, refrigerant charge, etc. It can also judge key indicators such as the piping sealing and heat exchange efficiency of the air conditioning unit, improving the maintainability of the air conditioning unit and reducing the problem of increased operation and maintenance costs due to the failure to detect potential faults in time.

[0046] The pressure detection mechanism can transmit the pressure inside the valve ball 2 to the valve cap 5 by briefly opening the valve core 4. Although this may cause some fluid leakage, the pressure inside the valve ball 2 can be directly transmitted to the pressure sensing mechanism, ensuring the reliability of the pressure sensing mechanism's detection.

[0047] Alternatively, an additional wiring channel can be provided on the valve stem 3, through which the detection part of the pressure detection mechanism can be extended into the valve ball 2, thereby directly obtaining the pressure inside the valve ball 2. Only reliable sealing of the wiring channel is required.

[0048] To facilitate the recovery of fluid discharged from the pressure relief channel 31, the ball valve assembly also includes a connecting pipe. A quick-release structure is provided on the valve stem 3 or the valve body 1, allowing the connecting pipe to be connected to the valve stem 3 and communicate with the pressure relief channel 31. The quick-release structure facilitates the connection of the connecting pipe, enabling the fluid discharged from the pressure relief channel 31 to be transported to the recovery structure or other pipeline systems, thus avoiding fluid waste and environmental pollution.

[0049] Optionally, an external thread is provided on the outer surface of the valve stem 3 or the outer surface of the valve body 1, and the external thread constitutes the quick-release structure. When installing the connecting pipe, the connecting pipe is connected by thread engagement with the external thread, which can ensure the reliability of the connecting pipe connection and also utilize the sealing effect of the thread engagement to ensure the sealing effect between the connecting pipe and the pressure relief channel 31, thereby avoiding fluid waste and environmental pollution.

[0050] In existing technologies, to alleviate the problem of excessive internal pressure in the valve ball 2 causing structural deformation, sealing failure, or even valve body 1 bursting, a single-sided sealing solution is generally adopted. Specifically, a sealing structure is set only on one side of the valve ball 2, ensuring that the interior of the valve ball 2 is always connected to the inflow or outflow direction. While this structure can solve the problem of excessive internal pressure in the valve ball 2, it sacrifices the integrity of the double-sided seal of the ball valve, leading to a decrease in the ball valve's sealing performance and failing to meet the requirements for high-pressure sealing. Furthermore, long-term exposure of the interior of the valve ball 2 can introduce impurities or pose a risk of secondary leakage, reducing the reliability of the system in which the ball valve is located. Therefore, the technical solution of this application can overcome the single-seal problem in the existing technology. The structure ensures the airtightness of the ball valve assembly by providing a double-sealing structure. Specifically, sealing structures 6 are provided at the connection points between the installation space and the first connecting channel 11, and between the installation space and the second connecting channel 12. The sealing structures 6 are in a sealing fit with the valve ball 2, sealing the valve ball 2 with the first connecting channel 11 and the second connecting channel 12. This allows fluid to flow only through the interior of the valve ball 2 between the first and second connecting channels 11 and 12. In other words, the double-sealing structure 6 can only be used based on the structure of the ball valve assembly of this application, effectively ensuring the airtightness of the ball valve assembly.

[0051] The sealing structure 6 is annular in shape. The valve ball 2 has a first connecting hole 21. The valve ball 2 has a connected state in which the first connecting channel 11 and the second connecting channel 12 are connected through the first connecting hole 21, and a closed state in which the first connecting channel 11 and the second connecting channel 12 are separated. When the valve ball 2 is in the connected state, the first connecting hole 21 is connected to the first connecting channel 11 and the second connecting channel 12 through the sealing structure 6. That is, the interior of the annular sealing structure 6 can accommodate fluid flow, while the annular shape of the sealing structure 6 can seal the area around the first connecting hole 21 of the valve ball 2, preventing fluid from flowing through the installation gap between the valve ball 2 and the inner wall of the installation space, thus ensuring the airtightness of the ball valve assembly.

[0052] Optionally, the ball valve assembly also includes a valve seat, through which the valve stem 3 is disposed on the valve body 1.

[0053] An air conditioning unit includes the aforementioned ball valve assembly. The valve core 4 in the ball valve assembly can be adapted to the refrigerant type and pressure conditions of the air conditioning unit, effectively improving the versatility of the ball valve assembly. In this case, the ball valve assembly can both regulate the piping within the air conditioning unit and relieve pressure on the unit.

[0054] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A ball valve assembly, characterized in that: include: The valve body (1) is provided with a first connecting channel (11) and a second connecting channel (12), and an installation space is formed between the first connecting channel (11) and the second connecting channel (12); Valve ball (2), which is rotatably disposed within the installation space; The valve stem (3) is rotatably mounted on the valve body (1), and the first end of the valve stem (3) is fixedly connected to the valve ball (2), the second end of the valve stem (3) is located outside the valve body (1), and the valve stem (3) can drive the valve ball (2) to rotate. The valve core (4) has a pressure relief channel (31) on the valve stem (3). The installation space is connected to the outside of the valve body (1) through the pressure relief channel (31). The valve core (4) is located in the pressure relief channel (31). The valve core (4) has a pressure relief state when the pressure relief channel (31) is opened and a closed state when the pressure relief channel (31) is closed.

2. The ball valve assembly according to claim 1, characterized in that: The valve core (4) includes a control part (41) and a blocking part (42). The blocking part (42) is movably disposed in the pressure relief channel (31). When the valve core (4) is in the pressure relief state, the blocking part (42) opens the pressure relief channel (31). When the valve core (4) is in the closed state, the blocking part (42) blocks the pressure relief channel (31). The control part (41) is connected to the blocking part (42), and the control part (41) is exposed to the outside of the valve stem (3).

3. The ball valve assembly according to claim 2, characterized in that: The end of the control unit (41) that communicates with the outside through the pressure relief channel (31) is exposed to the outside of the valve stem (3).

4. The ball valve assembly according to claim 1, characterized in that: The ball valve assembly also includes a valve cap (5), which is detachably mounted on the valve stem (3) and is capable of closing the pressure relief passage (31).

5. The ball valve assembly according to claim 4, characterized in that: The ball valve assembly also includes a pressure detection mechanism and a control mechanism. The pressure detection mechanism is located inside the valve cap (5) and can obtain the pressure value in the installation space. The pressure detection mechanism is electrically connected to the control mechanism and can control other mechanisms in conjunction with the pressure value detected by the pressure detection mechanism.

6. The ball valve assembly according to claim 1, characterized in that: The ball valve assembly also includes a connecting pipe. A quick-release structure is provided on the valve stem (3) or the valve body (1). The connecting pipe can be connected to the valve stem (3) through the quick-release structure, and the connecting pipe can be connected to the pressure relief channel (31).

7. The ball valve assembly according to claim 6, characterized in that: External threads are provided on the outer surface of the valve stem (3) or the outer surface of the valve body (1), and the external threads constitute the quick-release structure.

8. The ball valve assembly according to claim 1, characterized in that: A sealing structure (6) is provided at the connection position between the installation space and the first connecting channel (11) and at the connection position between the installation space and the second connecting channel (12), and the sealing structure (6) is sealed to the valve ball (2).

9. The ball valve assembly according to claim 8, characterized in that: The sealing structure (6) is annular in shape. The valve ball (2) is provided with a first connecting hole (21). The valve ball (2) has a connected state in which the first connecting channel (11) and the second connecting channel (12) are connected through the first connecting hole (21) and a closed state in which the first connecting channel (11) and the second connecting channel (12) are separated. When the valve ball (2) is in the connected state, the first connecting hole (21) is connected to the first connecting channel (11) and the second connecting channel (12) through the sealing structure (6).

10. An air conditioning unit, characterized in that: The ball valve assembly includes any one of claims 1 to 9.

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