Stop valve and air conditioner

Abstract

The utility model relates to a stop valve and an air conditioner. The stop valve comprises a valve body, a valve element assembly, a valve rod and a pressure compensation part. A valve cavity is formed in the valve body, and one end of the valve body is connected with a first pipe. The valve element assembly is arranged in the valve cavity. The valve element assembly comprises a static valve element and a movable valve element, a valve chamber is defined by the static valve element and the valve body, the movable valve element is located in the valve chamber and abuts against the static valve element, and the static valve element is provided with a valve port communicating with the valve chamber and the first pipe. At least part of the valve rod is arranged in the valve chamber, the valve rod is connected with the movable valve element, and the valve rod can rotate around the axis of the valve rod to drive the movable valve element to rotate so as to open or close the valve port; the pressure compensation piece is arranged in the valve cavity and connected with the valve rod. When the pressure between the valve rod and the valve element assembly is insufficient, the pressure compensation piece acts on the valve rod so that the valve rod can always have the trend of pressing the valve element assembly, the abutting effect of the valve rod and the valve element assembly is kept, sealing failure of the stop valve is prevented, and leakage is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, and particularly relates to a stop valve and an air conditioner. BACKGROUND

[0002] The stop valve is widely applied to the pipeline of an air conditioning system and is used for controlling the opening and closing of the pipeline. A known stop valve mainly comprises a valve rod, a moving valve core and a static valve core. One end of the valve rod is connected with the moving valve core, so that the moving valve core and the static valve core abut against each other, and the valve rod is rotated to drive the moving valve core to rotate relative to the static valve core, so as to remove the blocking of the opening on the static valve core by the moving valve core, thereby opening the stop valve. In order to ensure that the pressure between the moving valve core and the static valve core is sufficient to seal the fluid in the pipeline, a fastening limiting part is additionally arranged at the other end of the valve rod, and the fastening limiting part is tightened to provide sufficient sealing pressure for the moving valve core and the static valve core.

[0003] However, the fastening limiting part of the stop valve structure is subjected to the impact and vibration of the fluid in the stop valve for a long time, and is prone to loosening. As a result, the pressure applied by the valve rod to the static valve core and the moving valve core is insufficient, the abutting effect of the two is poor, and the sealing between the static valve core and the moving valve core is failed, thereby causing leakage. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a stop valve and an air conditioner which are not prone to leakage.

[0005] A stop valve comprises:

[0006] a valve body, a valve cavity is arranged in the valve body, and a first pipe is connected to one end of the valve body;

[0007] a valve core assembly arranged in the valve cavity, the valve core assembly comprises a static valve core and a moving valve core, the static valve core and the valve body form a valve chamber, the moving valve core is located in the valve chamber and abuts against the static valve core, and the static valve core is provided with a valve port communicating the valve chamber and the first pipe;

[0008] a valve rod, the valve rod is at least partially arranged in the valve chamber, the valve rod is connected with the moving valve core, and the valve rod can rotate around its own axis to drive the moving valve core to rotate, so as to open or close the valve port;

[0009] the stop valve further comprises a pressure compensation member arranged in the valve cavity, the pressure compensation member is connected with the valve rod and acts on the valve rod, so that the valve rod or the pressure compensation member always has a tendency to compress the valve core assembly.

[0010] In an embodiment, the stop valve further comprises a cover assembly, the cover assembly is sleeved on the valve rod and seals the valve cavity, and the valve rod can rotate relative to the cover assembly.

[0011] The valve stem includes a first section and a second section connected to each other. The end of the first section away from the second section is connected to the moving valve core. The outer periphery of the second section near the end of the first section is provided with an overlapping portion.

[0012] The pressure compensation component is sleeved on the outer periphery of the second section. The pressure compensation component is located between the capping assembly and the overlapping portion, and abuts against the capping assembly and the overlapping portion respectively.

[0013] In one embodiment, the shut-off valve further includes an anti-wear component.

[0014] The wear-resistant component is disposed between the overlapping portion and the pressure compensation component, and the wear-resistant component abuts against the overlapping portion and the pressure compensation component respectively. The pressure compensation component is connected to the overlapping portion through the wear-resistant component.

[0015] Alternatively, the wear-resistant component is disposed between the cover assembly and the pressure compensation component, and the wear-resistant component abuts against the cover assembly and the pressure compensation component respectively, and the pressure compensation component is connected to the cover assembly through the wear-resistant component.

[0016] In one embodiment, when the wear-resistant member is disposed between the overlapping portion and the pressure compensation member...

[0017] The sealing assembly has a limiting part on the side near the valve port. The limiting part extends from the sealing assembly toward the valve port and abuts against the outer periphery of the wear-resistant part. The limiting part, the sealing assembly, and the wear-resistant part together enclose a limiting space. The pressure compensation component is disposed within the limiting space.

[0018] In one embodiment, the pressure compensation element is a disc spring, which has an inner edge and an outer edge, the cross-sectional area of ​​the inner edge being smaller than that of the outer edge; the inner edge is connected to the overlapping portion, and the outer edge is connected to the capping assembly.

[0019] In one embodiment, when the wear-resistant component is disposed between the cover assembly and the pressure compensation component...

[0020] The wear-resistant component has a bottom surface, which is located on the side of the wear-resistant component closest to the valve port.

[0021] The outer edge is connected to the outer edge of the bottom surface.

[0022] In one embodiment, the moving valve core is provided with a retaining groove recessed toward the stationary valve core, the pressure compensation member is received in the retaining groove, and the valve stem passes through the retaining groove and abuts against the pressure compensation member.

[0023] In one embodiment, the shut-off valve further includes a cap assembly, which is sleeved on the valve stem and seals the valve cavity, and the valve stem is rotatable relative to the cap assembly;

[0024] The valve stem includes a first section and a second section connected to each other. The end of the first section away from the second section is connected to the moving valve core. The outer periphery of the second section near the end of the first section is provided with an overlapping portion.

[0025] The shut-off valve also includes an anti-wear component, which is disposed between the overlapping portion and the cap assembly, and the anti-wear component abuts against the overlapping portion and the cap assembly respectively.

[0026] In one embodiment, the capping assembly includes a first valve seat, a fastening connection, and a limiting member.

[0027] The first valve seat is at least partially located in the valve chamber and is fixedly connected to the end of the valve body away from the stationary valve core;

[0028] The fastening connector is installed on the first valve seat, and the fastening connector is sleeved around the second section, with the fastening connector abutting against the overlapping portion.

[0029] The limiting member is fixedly connected to the inner side of the end of the first valve seat away from the stationary valve core, and the limiting member is sleeved on the outside of the valve stem, and the limiting member abuts against the fastening connection member.

[0030] This application also provides an air conditioner including a shut-off valve as described in any of the preceding embodiments.

[0031] Compared with the prior art, the gate valve provided in this application, by setting a pressure compensation component acting on the valve stem, can compensate for the pressure applied by the valve stem to the stationary valve core and the moving valve core when the stationary valve core and the moving valve core are worn and the pressure applied by the valve stem to the stationary valve core and the moving valve core is insufficient. This allows the valve stem to press the valve core assembly tightly, maintain the contact effect between the valve stem and the valve core assembly, and thus prevent the gate valve from failing to seal and leaking. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1This is an exploded view of a shut-off valve according to an embodiment of this application;

[0034] Figure 2 This is a perspective view of a shut-off valve according to an embodiment of this application;

[0035] Figure 3 for Figure 2 Cross-sectional view at point A in the middle;

[0036] Figure 4 This is a cross-sectional view of the shut-off valve in another embodiment;

[0037] Figure 5 This is a schematic diagram of the internal structure of the shut-off valve in other embodiments of this application.

[0038] Figure label:

[0039] 10. Valve body; 101. Valve cavity; 102. Opening; 103. Valve chamber; 104. First end; 105. Second end; 106. Flaring; 107. First space; 110. First pipe; 120. Second pipe; 130. Mounting plate; 131. Mounting hole; 20. Valve core assembly; 210. Stationary valve core; 211. Valve port; 212. Protrusion; 220. Moving valve core; 221. Snap-fit ​​groove; 30. Valve stem; 310. First section; 320 321. Second section; 330. Overlapping part; 40. Third section; 510. Pressure compensation component; 521. Cover assembly; 532. Fastening connection component; 533. Limiting part; 534. First valve seat; 535. Limiting component; 536. Limiting sleeve; 537. Stop part; 60. Wear-resistant part; 718. Second valve seat; 719. Main body part; 710. Recessed part; 720. Support part; 721. First channel; 722. First groove; 723. First sealing element. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0042] Furthermore, 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is 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 can mean that the first feature is 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.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0045] Please see Figures 1 to 5This application provides a shut-off valve, including a valve body 10, a valve core assembly 20, a valve stem 30, and a pressure compensation component 40. The valve body 10 has a valve cavity 101, and one end of the valve body 10 is connected to a first pipe 110, with an opening 102 communicating with the valve cavity 101. The valve core assembly 20 is disposed within the valve cavity 101; the valve core assembly 20 includes a stationary valve core 210 and a moving valve core 220. The stationary valve core 210 is fixed relative to the valve body 10 and forms a valve chamber 103 with the valve body 10. The moving valve core 220 is located within the valve chamber 103 and abuts against the stationary valve core 210. The stationary valve core 210 has a valve port 211 communicating with the valve chamber 103 and the first pipe 110. The valve stem 30 is at least partially located in the valve chamber 103. The valve stem 30 is connected to the movable valve core 220, and the valve stem 30 can rotate around its own axis to drive the movable valve core 220 to rotate, thereby opening or closing the valve port 211. The pressure compensation element 40 is connected to the valve stem 30. The force generated by the pressure compensation element 40 acts on the valve stem 30 so that the valve stem 30 always has a clamping force on the valve core assembly 20, keeping the valve core assembly 20 tightly closed; or the force generated by the pressure compensation element 40 acts directly on the valve core assembly 20, thereby keeping the valve core assembly 20 tightly closed.

[0046] Understandably, since the moving valve core 220 opens or closes the valve port 211 on the moving valve core 220 by rotating relative to the stationary valve core 210, and the moving valve core 220 abuts against the stationary valve core 210, the stationary valve core 210 and the moving valve core 220 will rub against each other during the rotation of the moving valve core 220. As a result, after the shut-off valve has been used for a period of time, both the stationary valve core 210 and the moving valve core 220 will wear out. In other words, the height of the stationary valve core 210 and the moving valve core 220 in the axial direction of the valve cavity 101 will decrease, and a height difference will be generated between the valve stem 30 and the valve core assembly 20. Consequently, the valve stem 30 will not be able to make the moving valve core 220 abut against the stationary valve core 210, that is, the pressure applied by the valve stem 30 to the stationary valve core 210 and the moving valve core 220 is insufficient. In this embodiment, a pressure compensation component 40 is provided that acts on the valve stem 30. When the pressure applied by the valve stem 30 to the stationary valve core 210 and the moving valve core 220 is insufficient, the pressure compensation component 40 can act on the valve stem 30 to compensate for the pressure applied by the valve stem 30 to the stationary valve core 210 and the moving valve core 220, so that the moving valve core 220 presses against the stationary valve core 210, maintaining the contact effect between the moving valve core 220 and the stationary valve core 210, thereby preventing the shut-off valve from failing to seal and leaking.

[0047] Schematic, the pressure compensation element 40 is selected from a spring, a sheet spring, or other element that stores and releases energy through elastic deformation. Thus, during the production of this shut-off valve, the pressure compensation element 40 is compressed and stores energy. The pressure compensation element 40 has a tendency to return to its original shape and acts on the valve stem 30. When a height difference exists between the valve stem 30 and the valve core assembly 20, allowing the pressure compensation element 40 to partially return to its original shape, the pressure compensation element 40 releases some energy and acts on the valve stem 30, thereby compensating for the height difference between the valve stem 30 and the valve core assembly 20, ensuring that the valve stem 30 always presses against the valve core assembly 20. This application does not limit the pressure compensation element, as long as it can compensate for the height difference between the valve stem 30 and the valve core assembly 20. The elastic force and shape of the pressure compensation element can be freely chosen, with the elastic force determining the magnitude of the applied compensation pressure. Specifically, the pressure compensation element 40 is a disc spring, which reduces the required volume of the pressure compensation element 40, thereby reducing the volume of the shut-off valve. In other embodiments, the pressure compensation element 40 may also be a wave spring, an open gasket, a conical helical spring, a spiral spring, a diaphragm disc spring, a ring spring, a leaf spring, etc.

[0048] Furthermore, such as Figure 2 As shown, the valve body 10 is cylindrical, and the cross-sections of the valve body 10, valve cavity 101, and valve chamber 103 are all circular. This simplifies the structure of the valve body 10, helps save costs, and increases the flow rate at the opening 102 of the valve body 10. Furthermore, at least a portion of the outer circumference of the stationary valve core 210 is circular, and the outer circumference of the stationary valve core 210 circumferentially abuts against the inner wall of the valve cavity 101. This results in a tighter connection between the stationary valve core 210 and the valve cavity 101, ensuring that fluid can only pass through the valve port 211. Since at least a portion of the outer circumference of the moving valve core 220 is circular, and the moving valve core 220 is coaxially arranged with the stationary valve core 210, the compatibility between the moving valve core 220 and the stationary valve core 210 is better, reducing interference during rotation, lowering the torque requirement of the motor, and reducing the motor load.

[0049] Understandably, the valve body 10 is also provided with an opening 102, and the opening 102 is connected to the valve chamber 101. The first pipe 110 can extend into the opening 102, and part of the outer peripheral wall of the first pipe 110 is fixedly connected to the inner peripheral wall of the opening 102 of the valve body 10, so that the first pipe 110 can be connected to the valve chamber 103.

[0050] Furthermore, the valve cavity 101 extends through the valve body 10. The valve body 10 has a first end 104 and a second end 105 distributed opposite to each other. A first pipe 110 is connected to the first end 104, and the second end 105 is provided with a sealing assembly 50 for sealing the valve cavity 101. The sealing assembly 50 is used to seal the valve cavity 101. The sealing assembly 50, the stationary valve core 210, and the valve body 10 together enclose and form a valve chamber 103 to prevent internal leakage of fluid in the valve chamber 103. The sealing assembly 50 is sleeved on the valve stem 30 and seals the valve cavity 101. The valve stem 30 can rotate relative to the sealing assembly 50.

[0051] Furthermore, a flared end 106 is provided on the side wall of the valve body 10, that is, the flared end 106 is located between the first end 104 and the second end 105. The flared end 106 is connected to the valve chamber 103 and is used to connect the second pipe 120. The second pipe 120 is connected to the valve chamber 103 through the flared end 106, so that fluid flows into or out of the valve chamber 103 from the flared end 106. When the valve port 211 is in the open state, the first pipe 110, the valve chamber 103, and the second pipe 120 are connected; when the valve port 211 is in the closed state, the valve chamber 103 is disconnected from the first pipe 110, or the valve chamber 103 is disconnected from the second pipe 120.

[0052] Understandably, one of the first pipe 110 and the second pipe 120 serves as the inlet for fluid entering the shut-off valve, and the other serves as the outlet for fluid exiting the shut-off valve. Illustratively, when the shut-off valve is applied in an air conditioner, and the air conditioner is in cooling mode, the first pipe 110 serves as the inlet for fluid entering the shut-off valve, while the second pipe 120 serves as the outlet for fluid exiting the shut-off valve; when the air conditioner is in heating mode, the second pipe 120 serves as the inlet for fluid entering the shut-off valve, while the first pipe 110 serves as the outlet for fluid exiting the shut-off valve.

[0053] In one embodiment, the valve stem 30 includes a first segment 310 and a second segment 320 connected to each other. The end of the first segment 310 away from the second segment 320 is connected to the moving valve core 220, and the outer periphery of the second segment 320 near the end of the first segment 310 is provided with an overlapping portion 321. It is understood that during installation, the cap assembly 50 needs to press against the valve stem 30, applying pressure to the moving valve core 220 and the stationary valve core 210 through the valve stem 30, causing the moving valve core 220 to press against the stationary valve core 210, thereby ensuring a good sealing effect. That is, the cap assembly 50 abuts against the overlapping portion 321 of the valve stem 30 to properly press against the valve stem 30. Thus, the valve stem 30 abuts against the cover assembly 50 through the overlapping part 321. The cover assembly 50 can limit the valve stem 30 in the axial direction, preventing the valve stem 30 from moving away from the stationary valve core 210. This ensures that the stationary valve core 210 and the moving valve core 220 are always in contact, so that the fluid can only flow through the opening on the stationary valve core 210 and prevent internal leakage of the fluid.

[0054] In this embodiment, the pressure compensation component 40 is sleeved on the outer periphery of the second section 320. The pressure compensation component 40 is located between the cover assembly 50 and the overlapping portion 321, and abuts against the cover assembly 50 and the overlapping portion 321 respectively. It is understood that when wear occurs between the moving valve core 220 and the stationary valve core 210, or when the cover assembly 50 is subjected to long-term impact and vibration from the fluid inside the shut-off valve, the cover assembly 50 may become loose, which will result in insufficient pressure applied by the valve stem 30 to the moving valve core 220 and the stationary valve core 210. In this embodiment, the pressure compensation component 40 is disposed between the cover assembly 50 and the overlapping portion 321. The pressure compensation component 40 applies a compensation force toward the moving valve core 220 to the overlapping portion 321 of the valve core. This compensation force is transmitted from the overlapping portion 321 to the moving valve core 220, so that the moving valve core 220 can tightly abut against the stationary valve core 210. When the pressure applied by the valve stem 30 to the moving valve core 220 and the stationary valve core 210 is insufficient, the pressure compensation component 40 can achieve the effect of pressure compensation to ensure the sealing performance of the shut-off valve.

[0055] In one embodiment, the shut-off valve further includes an anti-wear component 60, which is disposed between the overlapping portion 321 and the cap assembly 50, and abuts against both the overlapping portion 321 and the cap assembly 50. It is understood that since the moving valve core 220 and the stationary valve core 210 open or close the valve port 211 through a pressing and rotating engagement, there will be both axial rotation and axial load between the second segment 320 of the valve stem 30 and the cap assembly 50. In this embodiment, the anti-wear component 60 is disposed between the overlapping portion 321 and the cap assembly 50. Thus, the anti-wear component 60 can bear the axial rotation and axial load between the second segment 320 of the valve stem 30 and the cap assembly 50, reducing the rotational friction between them and thereby reducing the motor's rotational torque.

[0056] Furthermore, such asFigure 4 As shown, the anti-wear component 60 is disposed between the overlapping portion 321 and the pressure compensation component 40, and the anti-wear component 60 abuts against both the overlapping portion 321 and the pressure compensation component 40. That is, both ends of the pressure compensation component 40 abut against the cap assembly 50 and the anti-wear component 60, respectively, and the pressure compensation component 40 is connected to the overlapping portion 321 via the anti-wear component 60. Thus, the pressure compensation component 40 applies a compensating force towards the moving valve core 220 to the overlapping portion 321 of the valve core through the anti-wear component 60. This compensating force is transmitted from the overlapping portion 321 to the moving valve core 220, allowing the moving valve core 220 to tightly abut against the stationary valve core 210. When the pressure applied by the valve stem 30 to the moving valve core 220 and the stationary valve core 210 is insufficient, the pressure compensation component 40 can achieve the effect of pressure compensation to ensure the sealing performance of the shut-off valve. Furthermore, it can reduce wear on the cap assembly 50 and improve the service life of the shut-off valve.

[0057] In this embodiment, a limiting part 511 is provided on the side of the cap assembly 50 near the valve port 211. The limiting part extends from the cap assembly toward the valve port and abuts against the outer periphery of the wear-resistant member 60. The limiting part 511, the cap assembly 50, and the wear-resistant member 60 together enclose a limiting space, within which the pressure compensation member 40 is disposed. Thus, the inner peripheral wall of the limiting part 511 restricts the movement direction of the wear-resistant member 60, preventing the axial direction of the wear-resistant member 60 from shifting relative to the axial direction of the valve stem 30. It also prevents the axial direction of the pressure compensation member 40 from shifting relative to the axial direction of the valve stem 30, thereby ensuring the working direction of the pressure compensation member 40 and maximizing its compensation effect.

[0058] Furthermore, in this embodiment, the pressure compensation component 40 is a disc spring, which has an inner edge and an outer edge, with the cross-sectional area of ​​the inner edge being smaller than that of the outer edge. Schematic, the inner edge of the disc spring abuts against the cap assembly 50, and the outer edge abuts against the overlapping portion 321. This ensures more uniform pressure applied by the disc spring, resulting in more uniform force on the moving valve core 220 and less impact from uneven wear. In other embodiments, the inner edge of the disc spring abuts against the overlapping portion 321, and the outer edge abuts against the cap assembly 50. This ensures concentricity, allowing the moving valve core 220 to be fixed in the center. In other words, the inner edge of the disc spring can abut against the cap assembly 50 or the anti-wear component 60; this application does not limit this, as long as the pressure compensation component 40 can compensate for the clamping force between the valve stem 30 and the valve core assembly 20.

[0059] In one embodiment, such as Figure 3As shown, the anti-wear component 60 is disposed between the cover assembly 50 and the pressure compensation component 40, and the anti-wear component 60 abuts against both the cover assembly 50 and the pressure compensation component 40. That is, both ends of the pressure compensation component 40 abut against the anti-wear component 60 and the abutment portion, respectively, and the pressure compensation component 40 is connected to the cover assembly 50 through the anti-wear component 60. Thus, the pressure compensation component 40 not only compensates for the clamping force between the valve stem 30 and the valve core assembly 20 and the cover assembly 50, but also reduces wear on the cover assembly 50 and the anti-wear component 60. Furthermore, since the contact area between the overlapping portion 321 and the pressure compensation component 40 is smaller than the contact area between the overlapping portion 321 and the anti-wear component 60, wear on the overlapping portion 321 is also reduced, thereby extending the service life of the shut-off valve.

[0060] Furthermore, in this embodiment, the pressure compensation component 40 is a disc spring, which has an inner edge and an outer edge, with the cross-sectional area of ​​the inner edge being smaller than that of the outer edge. The inner edge of the disc spring is connected to the overlapping portion 321, and the outer edge of the disc spring is connected to the capping assembly 50 via the anti-wear component 60. It is understood that during the process of the disc spring recovering its deformation, the change in the circumference of its outer edge is greater than the change in the circumference of its inner edge. This reduces the wear of the overlapping portion 321 by the pressure compensation component 40.

[0061] Furthermore, the wear-resistant component 60 has a bottom surface located on the side of the wear-resistant component 60 near the valve port 211. The outer edge of the pressure compensation component 40 is connected to the outer edge of the bottom surface of the wear-resistant component 60, and the pressure compensation component 40 rotates with the valve stem 30. The outer edge of the pressure compensation component 40 fits and limits the second section 320 of the valve stem 30, thereby improving the refrigerant impact resistance of the pressure compensation component 40 and extending the service life of the shut-off valve.

[0062] In one embodiment, such as Figure 5 As shown, the moving valve core 220 has a recessed locking groove 221 facing the stationary valve core 210. The pressure compensation component 40 is housed in the locking groove 221, and the valve stem 30 passes through the locking groove 221 and abuts against the pressure compensation component 40. Thus, the pressure compensation component 40 can directly act on the moving valve core 220 and the valve stem 30, effectively preventing the loss of clamping force. Furthermore, since the pressure compensation component 40 is located within the locking groove 221 of the moving valve core 220, and the bottom of the first end 104 of the valve stem 30 provides some shielding against the pressure compensation component 40, the impact of fluid on the pressure compensation component 40 can also be reduced.

[0063] It should be noted that in this embodiment, the snap-fit ​​groove 221 can be located at the edge of the moving valve core 220, that is, the snap-fit ​​groove has an opening on the surface of the moving valve core 220 away from the stationary valve core 210, and also has an opening on the edge of the moving valve core 220. In other embodiments, the snap-fit ​​groove can also be provided inside the moving valve core 220, that is, the snap-fit ​​groove only has an opening on the surface of the moving valve core 220 away from the stationary valve core 210. This application does not limit this, as long as the pressure compensation member 40 can be received in the snap-fit ​​groove, and the valve stem 30 can pass through the snap-fit ​​groove. In this embodiment, the snap-fit ​​groove 221 is formed by a recess in the surface of the automatic valve core 220 away from the stationary valve core 210 toward the stationary valve core 210, that is, the snap-fit ​​groove 221 does not penetrate the moving valve core 220. In other embodiments, the snap-fit ​​groove may also extend through the valve core 220 in the first direction. This application does not limit this, as long as the pressure compensation member 40 can be accommodated in the snap-fit ​​groove and the valve stem 30 can pass through the snap-fit ​​groove.

[0064] Furthermore, the end of the valve stem 30 near the moving valve core 220 can be inserted into the locking groove 221 and locked in place with the locking groove 221, thereby enabling the moving valve core 220 to rotate when the valve stem 30 rotates. In other embodiments, the valve stem 30 can also drive the moving valve core 220 in other ways, such as by integrally forming the valve stem 30 and the moving valve core 220, or by bonding the valve stem 30 and the moving valve core 220. This application does not limit this, as long as the valve stem 30 can drive the moving valve core 220 to rotate when it rotates. Specifically, the moving valve core 220 is provided with two mating grooves spaced apart along the circumferential direction, and the end of the valve stem 30 can connect to these two mating grooves simultaneously, thereby achieving a more stable locking and rotation between the two.

[0065] In one embodiment, the capping assembly 50 includes a first valve seat 520, a fastening connector 510, and a limiting member 530. The first valve seat 520 is at least partially located within the valve chamber 103 and is fixedly connected to the end of the valve body 10 away from the stationary valve core 210. The fastening connector 510 is installed on the first valve seat 520 and is sleeved around the second segment 320. The fastening connector 510 abuts against the overlapping portion 321. The limiting member 530 is fixedly connected to the inner side of the end of the first valve seat 520 away from the stationary valve core 210 and is sleeved outside the valve stem 30. The limiting member 530 abuts against the fastening connector 510.

[0066] The fastening connector 510 is installed on the first valve seat 520 and sleeved on the second section 320, with the fastening connector 510 abutting against the overlapping portion 321. Thus, the valve stem 30 abuts against the fastening connector 510 through the overlapping portion 321. The fastening connector 510 can limit the valve stem 30 in the axial direction, preventing the valve stem 30 from moving away from the stationary valve core 210. Furthermore, the first valve seat 520 provides a fixed mounting point for the fastening connector 510, preventing it from moving away from the stationary valve core 210. This ensures that the stationary valve core 210 and the moving valve core 220 are always in contact, guaranteeing that fluid can only flow through the opening on the stationary valve core 210 and preventing internal leakage.

[0067] Schematic illustration: The fastening connector 510 has external or internal threads, and the first valve seat 520 has internal or external threads that match the fastening connector 510. The fastening connector 510 and the first valve seat 520 are threadedly connected. Thus, the threads between the fastening connector 510 and the first valve seat 520 provide a clamping force that causes the fastening connector 510 to press against the overlapping portion 321 on the second section 320 of the valve stem 30. In other embodiments, the fastening connector 510 and the first valve seat 520 can be connected in other ways, and this application does not limit this.

[0068] In one embodiment, the valve stem 30 further includes a third segment 330 connected to the second segment 320, the second segment 320 being located between the first segment 310 and the third segment 330. The shut-off valve also includes a limiting member 530 that restricts the rotation angle of the valve stem 30, a first valve seat 520 being sleeved around the limiting member 530 and fixedly connected to the limiting member 530, and a fastening connector 510 being located between the limiting member 530 and the opening 102, with the side of the fastening connector 510 away from the opening 102 abutting against the limiting member 530. Thus, the limiting member 530 can not only limit the fastening connection 510 along the axial direction of the valve stem 30, thereby indirectly limiting the valve stem 30 in its axial direction to prevent loosening between the valve stem 30 and the moving valve core 220, but also facilitates the switching of the valve stem 30 in the two states of opening and closing the valve port 211, making the switching between the two states of opening and closing the valve port 211 more precise and further preventing fluid leakage.

[0069] Furthermore, the third segment 330 extends at least partially outside the valve body 10. That is, along the height direction of the valve body 10, the valve stem 30 is divided into an upper third segment 330, a middle second segment 320, and a lower first segment 310, with the first segment 310 and the second segment 320 both located within the valve cavity 101. The end of the third segment 330 away from the second segment 320 extends into the valve body 10 for connection with an external drive component, thereby driving the valve stem 30 to rotate via the drive component.

[0070] For example, the driving component can be either a handle or a motor, offering both manual and motor-driven options. In this embodiment, a motor is preferred for its ease of use. The connection method between the third segment 330 and the motor is optional and not limited in this application.

[0071] As a preferred option, the first segment 310, the second segment 320, and the third segment 330 are integrated into one structure, which makes the valve stem 30 more stable and easier to process.

[0072] In one embodiment, the limiting member 530 includes a ring-shaped limiting sleeve 531 sleeved around the third segment 330 and a stop portion 532 disposed on the inner peripheral wall of the limiting sleeve 531. There are two stop portions 532, which are arranged at intervals along the circumference of the limiting sleeve 531, and at least a portion of the third segment 330 is located between the two stop portions 532. Thus, the limiting member 530 has a simple structure and can effectively stop the third segment 330, preventing excessive movement of the valve stem 30 that could cause fluid leakage or affect the normal flow of fluid.

[0073] Furthermore, the second segment 320 has a circular cross-section, which reduces the friction between the second segment 320 and the fastening connector 510 during rotation, resulting in less wear and making it easier to rotate the valve core 220. The third segment 330 has at least one cross-section located between the two stop portions 532, making it easier to be stopped by the stop portions 532 and stop rotation in a timely manner.

[0074] In one embodiment, the shut-off valve further includes a second valve seat 70, on which the stationary valve core 210 is disposed. The second valve seat 70 includes an annular main body portion 710 and a support portion 720 protruding from the inner peripheral wall of the main body portion 710. The support portion 720 is disposed on the inner peripheral wall of the main body portion 710 and is used to support the stationary valve core 210. The outer peripheral wall of the main body portion 710 fits against the inner peripheral wall of the valve body 10. The inner peripheral wall of the main body portion 710 and the support portion 720 together define a first channel 721, which communicates with the valve port 211. Thus, the support portion 720 can assist in positioning the stationary valve core 210 on the second valve seat 70, simplifying the assembly of the shut-off valve and providing better support for the stationary valve core 210.

[0075] Furthermore, when valve port 211 is closed, the first channel 721 is also connected to the opening 102 and the first pipe 110. In this way, the flow of fluid in the shut-off valve is not affected.

[0076] In one embodiment, the stationary valve core 210 is at least partially located within the space defined by the inner peripheral wall of the main body 710. The outer peripheral wall of the stationary valve core 210 is provided with a protrusion 212 or a recess 711, and the inner peripheral wall of the main body 710 is provided with a recess 711 or a protrusion that mates with the protrusion 212 or the recess 711. This prevents the stationary valve core 210 from rotating relative to the valve body 10, thereby preventing fluid leakage from the connection between the stationary valve core 210 and the second valve seat 70 and improving the stability of the shut-off valve.

[0077] like Figure 1 As shown, in this embodiment, the outer wall of the stationary valve core 210 is provided with a protrusion 212, and the inner peripheral wall of the main body 710 is provided with a recess 711 that mates with the protrusion 212. Furthermore, there are two protrusions 212 and two recesses 711 to improve the anti-rotation effect. In other embodiments, the number of protrusions 212 and recesses 711 may be other than those specified in this application.

[0078] In one embodiment, the shut-off valve further includes a first seal 723. The support portion 720 is an annular flange extending along the inner peripheral wall of the main body portion 710. A first groove 722 extending circumferentially along the annular flange is formed on the side of the annular flange opposite to the opening 102. The first seal 723 is disposed in the first groove 722 and is press-fitted with the stationary valve core 210 to seal the stationary valve core 210 and the annular flange. This improves the sealing degree between the stationary valve core 210 and the second valve seat 70, prevents fluid leakage from the connection between the stationary valve core 210 and the second valve seat 70, and thus improves the stability of the shut-off valve.

[0079] Furthermore, both the stationary valve core 210 and the moving valve core 220 are made of ceramic material. Ceramic material has high hardness, is not easily deformed, has a smooth surface, and low friction, allowing the valve stem 30 to rotate the moving valve core 220 relative to the stationary valve core 210 with minimal torque, thereby closing the valve port 211. In other embodiments, the stationary valve core 210 and the moving valve core 220 may also be made of other materials, such as brass, to reduce costs. Brass also provides good sealing performance due to its low hardness. This application does not impose any limitations on this.

[0080] Furthermore, the number of valve ports 211 can be set to one or more. Preferably, two are used, and the two valve ports 211 are rotationally symmetrical about the center of the stationary valve core 210. This effectively increases the flow area and the flow efficiency of the shut-off valve. Since the shut-off valve opens and closes the valve ports 211 through the relative rotation between the moving valve core 220 and the stationary valve core 210, the rotational symmetry of the valve ports 211 about the center of the stationary valve core 210 facilitates the opening and closing of the valve ports 211 by the rotating moving valve core 220.

[0081] Specifically, the valve port 211 is configured as a fan shape, and the portion of the moving valve core 220 that blocks the valve port 211 is also configured as a fan shape. Thus, the fan-shaped valve port 211 is more suitable for the circular stationary valve core 210, maximizing the flow area of ​​the valve port 211 within the same size constraints. In other embodiments, the valve port 211 can also be circular, triangular, or rectangular, as long as it can be covered and blocked by the passive valve core 220; this application does not impose any limitations on this.

[0082] In one embodiment, the shut-off valve further includes a mounting plate 130, with the end of the second valve seat 70 away from the stationary valve core 210 and the end of the valve body 10 having an opening 102 both fixedly connected to the mounting plate 130. This facilitates the installation of the shut-off valve on other equipment.

[0083] Furthermore, a notch is provided at the end where the second valve seat 70 connects to the mounting plate 130. This notch, together with the inner peripheral wall of the mounting plate 130 and the valve body 10, forms a first space 107. A welding ring is housed in the first space 107. After the welding ring melts, it can weld the second valve seat 70, the valve body 10, and the mounting plate 130 together. In this way, the mechanical strength and stability of the shut-off valve can be improved.

[0084] Furthermore, the mounting plate 130 is provided with mounting holes 131, which are correspondingly provided with the opening 102, and the first pipe 110 is connected to the opening 102 and the valve port 211 through the mounting holes 131. In this way, when the valve port 211 is in the open state, fluid is ensured to flow between the first pipe 110, the valve chamber 103, and the second pipe 120.

[0085] Furthermore, the valve body 10, the second valve seat 70, and the second valve seat 70 are all made of stainless steel. This ensures the mechanical strength of the gate valve, and when the fluid in the valve chamber 103 is corrosive, the stainless steel material can prevent the valve body 10 and the second valve seat 70 from being corroded by the fluid in the valve chamber 103.

[0086] The working principle of this type of shut-off valve is as follows: the valve stem 30 can rotate around its own axis, thereby driving the moving valve core 220 to rotate relative to the stationary valve core 210, thus opening or closing the valve port 211. When the valve stem 30 drives the moving valve core 220 to rotate to a position that avoids blocking the valve port 211 on the stationary valve core 210, the valve port 211 is in the open state, and the first pipe 110, valve chamber 103, and second pipe 120 are connected, allowing fluid to flow from the first pipe 110 to the valve chamber 103 and then out through the second pipe 120; when the valve stem 30 drives the moving valve core 220 to rotate to a position that blocks the valve port 211 on the stationary valve core 210, the valve port 211 is in the closed state, the first pipe 110, valve chamber 103, and second pipe 120 are disconnected, and the fluid stops flowing.

[0087] This application also provides an air conditioner including a shut-off valve as described in any of the above embodiments.

[0088] Understandably, when this shut-off valve is used in an air conditioner, the fluid is refrigerant. Because the shut-off valve prevents sealing failure and refrigerant leakage, it extends the lifespan of the air conditioner. Furthermore, the valve body 10, the first valve seat 520, and the second valve seat 70 are all made of stainless steel. This ensures the mechanical strength of the shut-off valve, and when the fluid in the valve chamber 103 is corrosive, the stainless steel material prevents the valve body 10, the first valve seat 520, and the second valve seat 70 from being corroded by the fluid in the valve chamber 103. The valve core assembly 20 is made of ceramic to improve its corrosion resistance.

[0089] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A shut-off valve, comprising: A valve body (10) is provided with a valve cavity (101) inside the valve body (10), and a first pipe (110) is connected to one end of the valve body (10). A valve core assembly (20) is disposed in the valve cavity (101). The valve core assembly (20) includes a stationary valve core (210) and a moving valve core (220). The stationary valve core (210) and the valve body (10) enclose a valve chamber (103). The moving valve core (220) is located in the valve chamber (103) and abuts against the stationary valve core (210). The stationary valve core (210) has a valve port (211) that connects the valve chamber (103) and the first pipe (110). A valve stem (30) is at least partially disposed in the valve chamber (103). The valve stem (30) is connected to the moving valve core (220). The valve stem (30) is capable of rotating around its own axis to drive the moving valve core (220) to rotate in order to open or close the valve port (211). The valve is characterized in that it further includes a pressure compensation member (40) disposed in the valve cavity (101), the pressure compensation member (40) being connected to the valve stem (30) and acting on the valve stem (30) so that the valve stem (30) or the pressure compensation member (40) always tends to press the valve core assembly (20).

2. The shut-off valve according to claim 1, characterized in that, The shut-off valve also includes a cap assembly (50), which is sleeved on the valve stem (30) and seals the valve cavity (101). The valve stem (30) is rotatable relative to the cap assembly (50). The valve stem (30) includes a first section (310) and a second section (320) connected to each other. The end of the first section (310) away from the second section (320) is connected to the moving valve core (220). The outer periphery of the second section (320) near the end of the first section (310) is provided with an overlapping part (321). The pressure compensation component (40) is sleeved on the outer periphery of the second section (320). The pressure compensation component (40) is located between the capping assembly (50) and the overlapping part (321), and abuts against the capping assembly (50) and the overlapping part (321) respectively.

3. The shut-off valve according to claim 2, characterized in that, The shut-off valve also includes a wear-resistant component (60). The wear-resistant component (60) is disposed between the overlapping portion (321) and the pressure compensation component (40), and the wear-resistant component (60) abuts against the overlapping portion (321) and the pressure compensation component (40) respectively. The pressure compensation component (40) is connected to the overlapping portion (321) through the wear-resistant component (60). Alternatively, the anti-wear component (60) is disposed between the cover assembly (50) and the pressure compensation component (40), and the anti-wear component (60) abuts against the cover assembly (50) and the pressure compensation component (40) respectively, and the pressure compensation component (40) is connected to the cover assembly (50) through the anti-wear component (60).

4. The shut-off valve according to claim 3, characterized in that, When the wear-resistant component (60) is disposed between the overlapping portion (321) and the pressure compensation component (40), The cap assembly (50) has a limiting part (511) on the side near the valve port (211). The limiting part (511) extends from the cap assembly (50) toward the valve port (211). The limiting part (511) abuts against the outer periphery of the wear-resistant member (60). The limiting part (511), the cap assembly (50) and the wear-resistant member (60) together enclose a limiting space. The pressure compensation member (40) is located in the limiting space.

5. The shut-off valve according to claim 3, characterized in that, The pressure compensation component (40) is a disc spring, which has an inner edge and an outer edge. The cross-sectional area of ​​the inner edge is smaller than that of the outer edge. The inner edge is connected to the overlapping part (321), and the outer edge is connected to the capping assembly (50).

6. The shut-off valve according to claim 5, characterized in that, When the wear-resistant component (60) is disposed between the cover assembly (50) and the pressure compensation component (40), The wear-resistant component (60) has a bottom surface, which is located on the side of the wear-resistant component (60) near the valve port (211). The outer edge is connected to the outer edge of the bottom surface.

7. The shut-off valve according to claim 1, characterized in that, The moving valve core (220) is provided with a retaining groove (221) recessed towards the stationary valve core (210). The pressure compensation member (40) is received in the retaining groove (221). The valve stem (30) passes through the retaining groove (221) and abuts against the pressure compensation member (40).

8. The shut-off valve according to claim 7, characterized in that, The shut-off valve also includes a cap assembly (50), which is sleeved on the valve stem (30) and seals the valve cavity (101). The valve stem (30) is rotatable relative to the cap assembly (50). The valve stem (30) includes a first section (310) and a second section (320) connected to each other. The end of the first section (310) away from the second section (320) is connected to the moving valve core (220). The outer periphery of the second section (320) near the end of the first section (310) is provided with an overlapping part (321). The shut-off valve also includes an anti-wear component (60), which is disposed between the overlapping portion (321) and the capping assembly (50), and the anti-wear component (60) abuts against the overlapping portion (321) and the capping assembly (50) respectively.

9. The shut-off valve according to claim 2 or 8, characterized in that, The capping assembly (50) includes a first valve seat (520), a fastening connector (510), and a limiting member (530). The first valve seat (520) is at least partially located within the valve chamber (103) and is fixedly connected to the end of the valve body (10) away from the stationary valve core (210); The fastening connector (510) is installed on the first valve seat (520), and the fastening connector (510) is sleeved around the second section (320), and the fastening connector (510) abuts against the overlapping part (321). The limiting member (530) is fixedly connected to the inner side of the end of the first valve seat (520) away from the stationary valve core (210), and the limiting member (530) is sleeved on the valve stem (30), and the limiting member (530) abuts against the fastening connector (510).

10. An air conditioner, characterized in that, Includes the shut-off valve as described in any one of claims 1 to 9.

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