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;Pressure relief mechanism.The ball valve assembly and air conditioning unit provided by the utility model, by setting pressure relief mechanism on valve ball, when the pressure in first communication hole exceeds set threshold, it is automatically pressure-relieved, that is, the pressure generated inside valve ball can be discharged from valve ball, thereby effectively avoiding the problem of valve ball, valve body reliability caused by excessive internal pressure of valve ball, improve the safety of ball valve, and pressure relief mechanism is set on valve ball, and it will not affect the double-sided sealing structure set between valve body and valve ball, that is, it will not affect the double-sided sealing performance of ball valve, so as to ensure the air tightness of ball valve.

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 ball valve in existing technologies, a ball valve assembly and air conditioning unit are provided that incorporates a pressure relief mechanism on the ball 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 is rotatably disposed within the installation space. 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.

[0008] The pressure relief mechanism includes a second connecting hole on the valve ball. One end of the second connecting hole is connected to the outside of the valve ball, and the other end is connected to the first connecting hole. The pressure relief mechanism is located at the second connecting hole, and when the ball valve is in the closed state, the first connecting hole can be connected to the first connecting channel through the pressure relief mechanism.

[0009] The pressure relief mechanism includes a sealing element and a reset mechanism. The sealing element is movably disposed on the valve ball and has a first state of blocking the second connecting hole and a second state of opening the second connecting hole. The reset mechanism is connected to the sealing element and can switch the sealing element to the first state.

[0010] The valve ball is provided with a receiving groove, and when the sealing member is in the first state, the sealing member is located in the receiving groove.

[0011] When the sealing element is in the first state, the outer wall of the sealing element smoothly transitions with the outer wall of the valve ball; or, the outer wall of the sealing element is lower than the outer wall of the valve ball.

[0012] The sealing member has a first end and a second end opposite to each other. The first end is disposed on the valve ball, and the sealing member can be deformed to move the second end relative to the first end. When the sealing member is in the first state, the second end blocks the second connecting hole. When the sealing member is in the second state, the second end opens the second connecting hole.

[0013] The reset mechanism includes a spring, one end of which is connected to the sealing member and the other end of which is connected to the valve ball.

[0014] The reset mechanism includes a magnetic component, which is disposed on the valve ball and can magnetically engage with the sealing component.

[0015] The number of the second connecting holes is at least two. When the sealing member is in the first state, the sealing member can block all the second connecting holes, and when the sealing member is in the second state, the sealing member can open at least one of the second connecting holes.

[0016] The number of the second connecting holes is at least two, and the pressure relief mechanism corresponds one-to-one with the second connecting hole. Among all the pressure relief mechanisms, at least two of the reset mechanisms provide different reset forces.

[0017] An air conditioning unit includes the ball valve assembly described above.

[0018] The ball valve assembly and air conditioning unit provided by this utility model, by setting a pressure relief mechanism on the valve ball, automatically releases pressure when the pressure in the first connecting hole exceeds a set threshold, that is, the pressure generated inside the valve ball can be discharged from the valve ball, thereby effectively avoiding the problem of reliability of the valve ball and valve body caused by excessive internal pressure of the valve ball, improving the safety of the ball valve. Moreover, the pressure relief mechanism is set on the valve ball and does not affect the double-sided sealing structure set between the valve body and the valve ball, that is, it does not affect the double-sided sealing performance of the ball valve, thereby ensuring the airtightness of the ball valve. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a ball valve in the prior art;

[0020] Figure 2 This is a schematic diagram of the structure of the ball valve assembly provided in an embodiment of the present utility model;

[0021] Figure 3 An exploded view of the ball valve assembly provided in an embodiment of this utility model;

[0022] Figure 4 Another exploded view of the ball valve assembly provided in this embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the structure of the ball valve assembly provided in this embodiment when the sealing component is in the second state;

[0024] In the picture:

[0025] 1. Valve body; 11. First connecting channel; 12. Second connecting channel; 2. Valve ball; 21. First connecting hole; 3. Pressure relief mechanism; 22. Second connecting hole; 31. Sealing component; 32. Reset mechanism. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Therefore, this application provides a method such as Figures 2 to 5A ball valve assembly is shown, comprising: a valve body 1, wherein a first connecting channel 11 and a second connecting channel 12 are provided within the valve body 1, and an installation space is formed between the first connecting channel 11 and the second connecting channel 12; a valve ball 2, which is rotatably disposed within the installation space, and 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 to each other 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; and a pressure relief mechanism 3, wherein the valve ball 2 has a second connecting hole 22, one end of which is connected to the outside of the valve ball 2, and the other end is connected to the first connecting hole 21. The pressure relief mechanism 3 is disposed at the second connecting hole 22, and when the ball valve is in the closed state, the first connecting hole 21 can be connected to the first connecting channel 11 through the pressure relief mechanism 3.

[0033] By setting a pressure relief mechanism 3 on the valve ball 2, the pressure in the first connecting hole 21 is automatically relieved when it exceeds a set threshold. This means that the pressure generated inside the valve ball 2 can be discharged from the valve ball 2, thereby effectively avoiding the reliability problems of the valve ball 2 and valve body 1 caused by excessive internal pressure in the valve ball 2, and improving the safety of the ball valve. Moreover, the pressure relief mechanism 3 is set on the valve ball 2 and does not affect the double-sided sealing structure set between the valve body 1 and the valve ball 2, that is, it does not affect the double-sided sealing performance of the ball valve, thus ensuring the airtightness of the ball valve.

[0034] When using the ball valve assembly, the first connecting channel 11 and the second connecting channel 12 of the ball valve assembly are connected to the corresponding pipelines respectively. Then, the valve ball 2 is controlled by the valve stem connected to the valve ball 2, realizing the switching of the valve ball 2 between the connected state and the closed state.

[0035] The first connecting hole 21 on the valve ball 2 is a through hole that penetrates the center of the valve ball 2. When the valve ball 2 rotates to a set angle, one end of the first connecting hole 21 is connected to the first connecting channel 11, and the other end is connected to the second connecting channel 12. At this time, the valve ball 2 switches to the connected state, and the pressure relief mechanism 3 will rotate with the valve ball 2 to the position of abutting against the inner wall of the valve body 1. When the fluid flows through the valve ball 2, it can flow directly through the first connecting hole 21. Although the pressure relief mechanism 3 is connected to the first connecting hole 21 through the second connecting hole 22, the fluid in the first connecting hole 21 will enter the second connecting hole 22. Although the pressure of the fluid in the second connecting hole 22 is the same as the pressure of the fluid in the first connecting hole 21, the pressure relief mechanism 3 is abutted against by the inner wall of the valve body 1 and cannot relieve pressure, so the airtightness of the ball valve can still be guaranteed.

[0036] Even if there is a gap between the pressure relief mechanism 3 and the inner wall of the valve body 1, causing some pressure leakage, there are sealing structures on both sides of the valve ball 2. The pressure relief mechanism 3 is located between the two sealing structures at this time. The fluid leaking from the pressure relief mechanism 3 will still be sealed by the sealing structure, and the airtightness of the ball valve can still be guaranteed.

[0037] When the valve ball 2 is switched to the closed state, the pressure relief mechanism 3 will rotate with the valve ball 2 to face the first connecting channel 11. The pressure relief mechanism 3 will not be squeezed by the inner wall of the valve body 1. When the pressure in the first connecting hole 21 rises, the pressure relief mechanism 3 can automatically relieve the pressure into the first connecting channel 11, thereby avoiding the problem of excessive pressure in the valve ball 2. Similarly, when the valve ball 2 is switched to the closed state, the first connecting hole 21 will be connected to the space between the valve ball 2 and the valve body 1 which are sealed by the sealing structure. When the pressure in the space between the valve ball 2 and the valve body 1 rises, the pressure can enter the first connecting hole 21 and then be automatically relieved by the pressure relief mechanism 3, thereby avoiding the problem of excessive pressure in the valve body 1 and ultimately ensuring the reliability of the ball valve assembly.

[0038] For example, the pressure relief threshold of the ball valve assembly is set to 4.2 MPa. When the pressure in the first connecting hole 21 exceeds 4.2 MPa, the pressure relief mechanism 3 automatically relieves pressure until the pressure in the first connecting hole 21 is no greater than 4.2 MPa, at which point the pressure relief mechanism 3 automatically closes. The pressure relief threshold of the ball valve assembly is adjusted according to parameters such as refrigerant type and system pressure.

[0039] In one embodiment, the pressure relief mechanism 3 includes a sealing member 31, which is deformably disposed on the valve ball 2. The sealing member 31 has a first state of blocking the second connecting hole 22 and a second state of opening the second connecting hole 22. By using the sealing member 31 to block the second connecting hole 22, leakage is prevented from occurring in the second connecting hole 22 when it is not needed. Only when the pressure in the first connecting hole 21 exceeds a preset value can the sealing member 31 be opened to relieve pressure. The deformation of the sealing member 31 maintains the sealing effect of the sealing member 31 on the second connecting hole 22.

[0040] In another embodiment, the pressure relief mechanism 3 includes a sealing element 31 and a reset mechanism 32. The sealing element 31 is movably disposed on the valve ball 2, and has a first state of blocking the second connecting hole 22 and a second state of opening the second connecting hole 22. The reset mechanism 32 is connected to the sealing element 31, and the reset mechanism 32 can switch the sealing element 31 to the first state. The sealing element 31 blocks the second connecting hole 22 to prevent leakage when the second connecting hole 22 is not needed. Only when the pressure in the first connecting hole 21 exceeds a preset value can the sealing element 31 be opened to relieve pressure. The reset mechanism 32 maintains the blocking state of the sealing element 31 on the second connecting hole 22, ensuring the sealing effect of the sealing element 31.

[0041] Preferably, the first connecting channel 11 is connected to the incoming fluid path, and the second connecting channel 12 is connected to the outgoing fluid path. That is, when the valve ball 2 is switched to the connected state, the first connecting channel 11 serves as the inlet flow channel of the ball valve. When the valve ball 2 is switched to the blocked state, the first connecting channel 11 will always be connected to the source of the fluid and have pressure. At this time, the pressure of the source of the fluid will also act on the blocking member 31. Only when the pressure in the first connecting hole 21 exceeds the reset force of the reset mechanism 32 and the pressure in the first connecting channel 11 can the blocking member 31 be opened to release the pressure into the first connecting channel 11, ensuring the reliability of the valve ball 2 and the valve body 1. At the same time, the fluid released by the second connecting hole 22 will not enter the second connecting channel 12, avoiding leakage at the valve ball and leakage of the ball valve assembly due to the pressure relief process.

[0042] Since the valve ball 2 needs to rotate within the installation space, and to ensure airtightness, the installation space is designed as a spherical space with dimensions not significantly different from that of the valve ball 2. This ensures reliable rotation of the valve ball 2 without leakage. Because the sealing element 31 needs to be mounted on the valve ball 2, a receiving groove is provided on the valve ball 2. When the sealing element 31 is in the first state, it is located within the receiving groove. The receiving groove houses the sealing element 31, preventing it from protruding and causing the valve ball 2 to be unable to rotate, thus ensuring the reliable operation of the ball valve assembly.

[0043] Specifically, when the sealing member 31 is in the first state, the outer wall of the sealing member 31 smoothly transitions with the outer wall of the valve ball 2. That is, the shape of the sealing member 31 is exactly the same as the shape of the receiving groove, and the outer wall of the sealing member 31 and the outer wall of the valve ball 2 are continuous curved surfaces, minimizing the gap between the sealing member 31 and the inner wall of the valve body 1, and ensuring the supporting effect of the valve body 1 on the sealing member 31.

[0044] Optionally, the outer wall of the sealing member 31 is lower than the outer wall of the valve ball 2. That is, when the sealing member 31 is located in the receiving groove, a recessed area will be formed on the outer wall of the valve ball 2. Although this will increase the gap between the sealing member 31 and the inside of the valve body 1, it can reserve space for the possible deformation of the sealing member 31 after long-term use, effectively improving the service life of the ball valve assembly.

[0045] The length of the sealing member 31 extending into the second connecting hole 22 is not less than the depth of the recessed area. Even if the sealing member 31 deforms after long-term use, it can still reliably seal the second connecting hole 22.

[0046] like Figure 1 and Figure 2 As shown, the sealing member 31 has a first end and a second end opposite to each other. The first end is disposed on the valve ball 2, and the sealing member 31 can deform to move the second end relative to the first end. When the sealing member 31 is in the first state, the second end blocks the second connecting hole 22; when the sealing member 31 is in the second state, the second end opens the second connecting hole 22. The deformation of the sealing member 31 can further increase the pressure value required for the sealing member 31 to switch to the second state, increase the automatic pressure relief pressure value of the ball valve assembly, and improve the applicability of the ball valve assembly.

[0047] Preferably, the shape of the sealing element 31 is a partial spherical surface, and the center of the sphere of the sealing element 31 coincides with the center of the sphere of the valve ball 2.

[0048] The receiving groove is provided with an area for accommodating the reset mechanism 32. The reset mechanism 32 can reset the sealing member 31 inside the receiving groove, so as to avoid the reset mechanism 32 protruding on the surface of the valve ball 2 and affecting the rotation reliability of the valve ball 2.

[0049] The reset mechanism 32 includes a spring, one end of which is connected to the sealing member 31, and the other end is connected to the valve ball 2. When the sealing member 31 moves, the spring can be stretched to generate elastic force, which serves as the reset force of the sealing member 31. When the pressure squeezing the sealing member 31 in the second connecting hole 22 decreases, the reset force begins to drive the sealing member 31 to move and re-seal the second connecting hole 22, thereby ensuring that the sealing member 31 reliably switches to the first state, improving the reliability of the pressure relief mechanism 3 and the airtightness of the ball valve assembly.

[0050] In another embodiment not shown in the figure, the reset mechanism 32 includes a magnetic element disposed on the valve ball 2, and the magnetic element can magnetically cooperate with the sealing element 31. The magnetic element can magnetically attract the sealing element 31, and this magnetic force can serve as the reset force of the sealing element 31. When the pressure squeezing the sealing element 31 in the second connecting hole 22 decreases, the reset force begins to drive the sealing element 31 to move and re-seal the second connecting hole 22, thereby ensuring that the sealing element 31 reliably switches to the first state, improving the reliability of the pressure relief mechanism 3 and the airtightness of the ball valve assembly.

[0051] In another embodiment, the reset mechanism 32 can be a hydraulic drive device. The pressure inlet of the hydraulic drive device is connected to the first connecting channel 11. The pressure value in the first connecting channel 11 is used to generate a driving force, which can be used as the reset force of the sealing member 31. When the pressure squeezing the sealing member 31 in the second connecting hole 22 decreases, the reset force begins to drive the sealing member 31 to move and re-seal the second connecting hole 22, thereby ensuring that the sealing member 31 reliably switches to the first state, improving the reliability of the pressure relief mechanism 3 and the airtightness of the ball valve assembly.

[0052] In another embodiment (not shown in the figures of this application), the number of second connecting holes 22 is at least two. When the sealing member 31 is in the first state, it can block all the second connecting holes 22, and when the sealing member 31 is in the second state, it can open at least one of the second connecting holes 22. Using multiple second connecting holes 22 improves the pressure relief efficiency during the pressure relief process. Especially when the pressure change in the first connecting hole 21 is rapid and the rate of increase is fast, multiple second connecting holes 22 can be used for simultaneous pressure relief, thereby avoiding excessive pressure that could affect the structural reliability of the valve ball 2 and the valve body 1. Furthermore, the sealing member 31 can select the number of second connecting holes 22 to open as needed, preventing pressure from affecting the fluid in the first connecting channel 11 during automatic pressure relief, thus ensuring the structural reliability of the valve body 1.

[0053] All the second connecting holes 22 are arranged sequentially along the length direction of the sealing member 31, and the sealing member 31 has a first end and a second end in the length direction. The first end is fixedly set on the valve ball 2, and the sealing member 31 can move the second end relative to the first end by deformation. When automatic pressure relief is performed, the sealing member 31 can gradually open the second connecting hole 22 according to the pressure, so as to ensure the reliability of pressure relief.

[0054] Furthermore, along the direction from the first end to the second end, the flow area of ​​the second connecting hole 22 gradually decreases. When the pressure in the first connecting hole 21 exceeds the pressure relief threshold but the difference is not large, the pressure will be relieved preferentially by the second connecting hole 22 near the second end, reducing the deformation of the sealing element 31 and improving the reliability of the sealing element 31 and the ball valve assembly. When the pressure in the first connecting hole 21 exceeds the pressure relief threshold but the difference is large, multiple second connecting holes 22 will be opened to relieve pressure simultaneously, avoiding the pressure in the first connecting hole 21 impacting the sealing element 31 and causing irreversible deformation of the sealing element 31, thus improving the reliability of the sealing element 31 and the ball valve assembly.

[0055] In another implementation, the number of the second connecting holes 22 is at least two, and the pressure relief mechanism 3 corresponds one-to-one with the second connecting holes 22. Using multiple second connecting holes 22 improves the pressure relief efficiency during the pressure relief process. In particular, when the pressure in the first connecting hole 21 changes rapidly and rises at a fast rate, multiple second connecting holes 22 can be used for simultaneous pressure relief, thereby preventing excessive pressure in the first connecting hole 21 from affecting the structural reliability of the valve ball 2 and the valve body 1.

[0056] Preferably, in all the pressure relief mechanisms 3, at least two of the reset mechanisms 32 provide different reset forces. When the pressure in the first connecting hole 21 exceeds the pressure relief threshold but the difference is not large, the pressure relief mechanism 3 with the smaller reset force will prioritize pressure relief; while when the pressure in the first connecting hole 21 exceeds the pressure relief threshold but the difference is large, multiple pressure relief mechanisms 3 will be opened to relieve pressure simultaneously, avoiding the pressure in the first connecting hole 21 impacting the sealing member 31 and causing irreversible deformation of the sealing member 31, thereby improving the reliability of the sealing member 31 and the ball valve assembly.

[0057] An air conditioning unit includes the ball valve assembly described above.

[0058] 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); A valve ball (2) is rotatably disposed in the installation space. 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 to each other 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. The pressure relief mechanism (3) is provided with a second connecting hole (22) on the valve ball (2). One end of the second connecting hole (22) is connected to the outside of the valve ball (2), and the other end is connected to the first connecting hole (21). The pressure relief mechanism (3) is located at the second connecting hole (22). When the ball valve is in the closed state, the first connecting hole (21) can be connected to the first connecting channel (11) through the pressure relief mechanism (3).

2. The ball valve assembly according to claim 1, characterized in that: The pressure relief mechanism (3) includes a plugging component (31) and a reset mechanism (32). The plugging component (31) is movably disposed on the valve ball (2), and the plugging component (31) has a first state of blocking the second connecting hole (22) and a second state of opening the second connecting hole (22). The reset mechanism (32) is connected to the plugging component (31), and the reset mechanism (32) can switch the plugging component (31) to the first state.

3. The ball valve assembly according to claim 2, characterized in that: The valve ball (2) is provided with a receiving groove. When the sealing member (31) is in the first state, the sealing member (31) is located in the receiving groove.

4. The ball valve assembly according to claim 3, characterized in that: When the plug (31) is in the first state, the outer wall of the plug (31) smoothly transitions with the outer wall of the valve ball (2); or, the outer wall of the plug (31) is lower than the outer wall of the valve ball (2).

5. The ball valve assembly according to claim 2, characterized in that: The plugging member (31) has a first end and a second end opposite to each other. The first end is disposed on the valve ball (2), and the plugging member (31) can be deformed to move the second end relative to the first end. When the plugging member (31) is in the first state, the second end blocks the second connecting hole (22). When the plugging member (31) is in the second state, the second end opens the second connecting hole (22).

6. The ball valve assembly according to claim 2, characterized in that: The reset mechanism (32) includes a spring, one end of which is connected to the sealing member (31) and the other end of which is connected to the valve ball (2).

7. The ball valve assembly according to claim 2, characterized in that: The reset mechanism (32) includes a magnetic element, which is disposed on the valve ball (2) and can magnetically cooperate with the sealing element (31).

8. The ball valve assembly according to claim 2, characterized in that: The number of the second connecting holes (22) is at least two. When the sealing member (31) is in the first state, the sealing member (31) can block all the second connecting holes (22), and when the sealing member (31) is in the second state, the sealing member (31) can open at least one of the second connecting holes (22).

9. The ball valve assembly according to claim 2, characterized in that: The number of the second connecting holes (22) is at least two, and the pressure relief mechanism (3) corresponds one-to-one with the second connecting holes (22). Among all the pressure relief mechanisms (3), at least two of the reset mechanisms (32) provide different reset forces.

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

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