A valve device

Abstract

This application provides a valve device, including a housing, a valve core, and a sealing assembly. The housing has a mounting cavity, at least a portion of which is located within the mounting cavity. A valve port is defined on the side wall of the mounting cavity. Along the radial direction of the valve device, the sealing assembly is disposed between the housing and the valve core, and a channel in the sealing assembly corresponds to the valve port. The housing and the bottom of the valve core are connected in a limiting manner. The valve core is rotatable relative to the housing. The valve core includes a flow guide portion and a blocking portion. The flow guide portion has a flow channel groove that communicates with the valve port. The blocking portion blocks the valve port. The spherical surface of the valve core has an eccentric structure. By offsetting the semi-circular spherical surface containing the flow channel groove in the valve core inward by a certain dimension, the compression of the sealing assembly mating at that location can be reduced, allowing the sealing block to contact the valve core without force. This reduces the force on the sealing block, decreases its deformation, improves its service life, and enhances the sealing performance of the valve device.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, and more particularly to a valve device. Background Technology

[0002] Valve core balls are widely used in electronic water valves for automotive thermal management systems. The valve core opening is usually equipped with a seal to maintain a good seal with the valve core. However, only the top and bottom sides of the valve core opening are in contact with the seal, while the left and right sides are suspended. This causes uneven stress on the seal, making it prone to bending and deformation, which in turn leads to a decrease in the internal sealing performance of the valve device. Summary of the Invention

[0003] In view of this, this application provides a valve device to help solve the problem of poor internal sealing performance of valve devices in the prior art.

[0004] This application provides a valve device, including: a housing, a valve core, and a sealing assembly. The housing has a mounting cavity, at least a portion of the valve core is located in the mounting cavity, and a valve port is defined on the side wall of the mounting cavity. Along the radial direction of the valve device, the sealing assembly is disposed between the housing and the valve core, and a channel of the sealing assembly corresponds to the valve port. The housing and the bottom of the valve core are connected in a limiting manner, and the valve core is rotatable relative to the housing. The valve core includes a flow guide portion, a sealing portion, and a spindle. The flow guide portion and the sealing portion are arranged along the circumferential direction of the valve core. The flow guide portion has a flow channel groove that communicates with the valve port. The sealing portion can seal the valve port. The portion of the sealing portion that at least partially contacts the sealing assembly is defined as... The first spherical surface, the flow guide portion including the second spherical surface, the center of the first spherical surface located at the centerline of the mandrel, the direction of extension from the center of the flow guide portion to the center of the sealing portion defined as the first direction, along the first direction of the valve core, the center of the second spherical surface deviates from the centerline of the mandrel in a direction closer to the first spherical surface, the sealing assembly having a first sealing state and a second sealing state, in the first sealing state, the sealing assembly abutting against the sealing portion and the sidewall defining the valve port, in the second sealing state, there is a gap between the sealing assembly and the flow guide portion, or the sealing assembly and the flow guide portion are not in force contact, or the compression of the sealing assembly in the second sealing state is less than the compression of the sealing assembly in the first sealing state.

[0005] The valve device provided in this application has a first spherical surface of the sealing part with its center at the center line of the spindle, and a second spherical surface of the flow guiding part with its center offset from the center line of the spindle towards the first spherical surface. A sealing assembly is disposed between the valve body and the valve core. As the valve core rotates, when the sealing part of the valve core aligns with the sealing assembly, it is in a first sealing state. In this first sealing state, the sealing assembly abuts against the sealing part and the side wall defining the valve port, achieving a seal. As the valve core continues to rotate, when the flow guiding part aligns with the sealing assembly, it is in a second sealing state. In this second sealing state, there is a gap between the sealing assembly and the flow guiding part, or the sealing assembly and the flow guiding part are not in forceful contact, or the compression of the sealing assembly is less than that in the first sealing state. It can be seen that by offsetting the second spherical surface where the flow channel groove in the valve core is located by a certain dimension towards the first spherical surface along the first direction, the compression of the sealing assembly mating at that location can be reduced, or it can be placed in a state of no compression, releasing the elasticity of the sealing assembly and allowing the sealing assembly to contact the valve core without force, thereby reducing the force on the sealing assembly at that location, reducing the deformation of the sealing assembly, and improving the sealing performance of the valve device.

[0006] This application provides a valve device, comprising: a housing, a valve core, and at least two sets of sealing assemblies. The housing has a mounting cavity, at least a portion of the valve core is located in the mounting cavity, and a valve port is defined on the side wall of the mounting cavity. Along the radial direction of the valve device, the sealing assemblies are disposed between the housing and the valve core, and the channels of the sealing assemblies correspond to the valve port. The housing is bottom-limitedly connected to the valve core, and the valve core is rotatable relative to the housing. The valve core includes a flow guide, a sealing portion, and a spindle. The flow guide and the sealing portion are arranged along the circumferential direction of the valve core. The flow guide has a flow channel groove that communicates with the valve port. The sealing portion can seal the valve port, and at least a portion of the sealing portion is defined to be connected to the valve port. The contact area of ​​the sealing assembly is a first spherical surface, and the flow guide includes a second spherical surface. The center of the first spherical surface is located at the centerline of the mandrel along a first direction of the valve core. The center of the second spherical surface deviates from the centerline of the mandrel in a direction closer to the first spherical surface. In the axial section of the valve device, one set of the sealing assemblies corresponds to the plugging part, and the sealing assembly abuts against the plugging part and the side wall defining the valve port; another set of the sealing assemblies corresponds to the flow guide, and there is a gap between the sealing assembly and the flow guide, or the sealing assembly and the flow guide are not in force contact, or the compression of the sealing assembly abutting against the flow guide is less than the compression of the sealing assembly abutting against the plugging part.

[0007] The valve device provided in this application has a first spherical surface of the sealing part with its center at the center line of the spindle, and a second spherical surface of the flow guide part with its center offset from the center line of the spindle towards the first spherical surface. A sealing assembly is disposed between the valve body and the valve core. In the axial section of the valve device, one set of the sealing assemblies corresponds to the sealing part, and the sealing assembly abuts against the sealing part and the side wall defining the valve port. By shifting the center of the second spherical surface where the flow guide part is located towards the sealing part, when the flow guide part cooperates with the other set of sealing assemblies, there is a gap between the sealing assembly and the flow guide part, or the sealing assembly and the flow guide part are not in force contact, or the compression of the sealing assembly abutting against the flow guide part is less than the compression of the sealing assembly abutting against the sealing part, thereby reducing the force on the sealing assembly at that point, reducing the deformation of the sealing assembly, and improving the sealing performance of the valve device. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments 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.

[0009] Figure 1 A schematic diagram of one embodiment of the valve device provided in this application;

[0010] Figure 2 for Figure 1 A cross-sectional view;

[0011] Figure 3 for Figure 1 A schematic diagram of one embodiment of the housing;

[0012] Figure 4 for Figure 1 A schematic diagram of one embodiment of a flange;

[0013] Figure 5 for Figure 2 A partially enlarged schematic diagram of section II;

[0014] Figure 6 for Figure 2 A magnified view of a portion of section I;

[0015] Figure 7 for Figure 2 A magnified view of a portion of section III;

[0016] Figure 8 A schematic diagram of one embodiment of the first and second spheres provided in this application;

[0017] Figure 9 This application provides a schematic diagram of one embodiment of the first valve core;

[0018] Figure 10 This application provides a schematic diagram of one embodiment of the second valve core.

[0019] 1-Shell;

[0020] 11-First connection port;

[0021] 12 - Second connection port;

[0022] 13 - Third connection port;

[0023] 131 - Positioning protrusion;

[0024] 14-Valve port;

[0025] 15 - Mounting cavity;

[0026] 2-Flange;

[0027] 21-Positioning hole;

[0028] 3-Valve core;

[0029] 31-Guide section;

[0030] 311 - Flow channel groove;

[0031] 32-Blocking section;

[0032] 33-Mandrel;

[0033] 34 - Mounting holes;

[0034] 35 - First valve core;

[0035] 36 - Second valve core;

[0036] 4-Sealing assembly;

[0037] 41-Sealing block;

[0038] 42 - Sealing ring;

[0039] 5-Seals;

[0040] 6-Sealing flange;

[0041] 61 - Limiting hole. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0043] like Figure 1 and Figure 2 As shown, this application provides a valve device including a housing 1, a valve core 3, and a sealing assembly 4. The housing 1 has a mounting cavity 15, at least a portion of the valve core 3 is located in the mounting cavity 15, and the side wall defining the mounting cavity 15 has a valve port 14. Along the radial direction of the valve device, the sealing assembly 4 is disposed between the housing 1 and the valve core 3, and the channel of the sealing assembly 4 corresponds to the valve port 14. The housing 1 and the bottom of the valve core 3 are connected in a limiting manner, and the valve core 3 can rotate relative to the housing 1.

[0044] like Figure 9 and Figure 10 As shown, the valve core 3 includes a flow guide 31, a sealing part 32, and a spindle 33. The flow guide 31 and the sealing part 32 are arranged along the circumference of the valve core 3. The flow guide 31 has a flow channel groove 311, which can communicate with the valve port 14. The sealing part 32 can seal the valve port 14. The flow guide 31 is a circular arc-shaped outer wall surface, which can be part of a sphere. The part where at least a portion of the sealing part 32 contacts the sealing assembly 4 is defined as the first spherical surface. The flow guide 31 includes a second spherical surface. The center of the first spherical surface is located at the centerline of the spindle 33. The direction extending from the center of the spherical surface where the flow guide 31 is located to the center of the spherical surface where the sealing part 32 is located is defined as the first direction R. Along the first direction R of the valve core 3, the center of the second spherical surface deviates from the centerline of the spindle 33 in a direction closer to the first spherical surface. By eccentric arrangement, the first spherical surface and the second spherical surface can have different contact states with the sealing assembly 4. As the valve core rotates, the sealing assembly 4 and the valve core are in a first sealing state and a second sealing state. In the first sealing state, the sealing assembly 4 abuts against the side wall of the plugging part 32 and the limiting valve port 14. In the second sealing state, there is a gap between the sealing assembly 4 and the flow guiding part 31, or the sealing assembly 4 and the flow guiding part 31 are not in force contact, or the compression of the sealing assembly 4 in the second sealing state is less than the compression of the sealing assembly 4 in the first sealing state.

[0045] The valve core 3 can rotate under the control of the control component. The sealing part 32 and the flow guiding part 31 of the valve core 3 can respectively cooperate with the valve port 14. The sealing part 32 is used to seal the valve port 14, and the flow guiding part 31 communicates with the valve port 14 to achieve a conduction effect. The valve port 14 is the position where the liquid inlet or outlet communicates with the mounting cavity 15. One of the first connection port 11 and the second connection port 12 can realize the liquid inlet function, and the other can realize the liquid outlet function.

[0046] Because the guide portion 31 does not need to achieve a sealing effect, a gap is allowed between the guide portion 31 and the sealing assembly 4, or the guide portion 31 can contact the sealing assembly 4 but with minimal deformation or no deformation. When the sealing assembly 4 is in the second sealing state, the contact pressure between the sealing assembly 4 and the valve core 3 is less than that in the first sealing state. Therefore, the deformation and wear of the sealing assembly 4 and the valve core 3 are smaller in the second state, which is beneficial to improving the service life of the sealing assembly 4. The valve core 3 provided in this embodiment has an irregular shape and uneven density. Therefore, it may easily deviate when the valve core 3 rotates. The housing 1 limits the valve core 3 by providing a limiting connection, thereby improving the stability of rotation. On the other hand, the friction between the guide portion 31 and the sealing assembly 4 is small, which reduces the torque when the valve core 3 rotates and improves the stability of the valve device during operation.

[0047] It should be noted that the center of the first sphere is located on the center line of the mandrel 33, which means that the projection of the center of the sealing part along the axial direction of the valve core coincides with the projection of the mandrel, so as to ensure that the sealing part can always be sealed and fitted with the sealing assembly during the rotation of the valve core.

[0048] The sealing assembly 4 includes a sealing block 41 and a sealing ring 42. The sealing ring 42 is sleeved and fixed to the sealing block 41. The sealing block 41 has a channel corresponding to the valve port 14. Along the radial direction of the valve core 3, the side of the sealing ring 42 away from the valve core 3 abuts against the housing 1. Along the axial direction of the valve core 3, the sealing ring 42 is respectively limited and connected to the flange 2 and the housing 1. Along the radial direction of the valve device, the sealing ring 42 abuts against the sealing block 41 and the housing 1 in a compressed state, so that the sealing block 41 can abut against the valve core 3 along the radial direction of the valve core 3 to achieve the sealing function.

[0049] The spherical surface of the valve core 3 has an eccentric structure. By offsetting the semi-circular spherical surface of the flow channel groove 311 in the valve core 3 towards the sealing part 32 by a certain size, the compression of the sealing component 4 that cooperates with it can be reduced, or it can be placed in an uncompressed state. This releases the elasticity of the sealing ring 42, so that the sealing block 41 contacts the valve core without force, thereby reducing the force on the sealing block 41, reducing the deformation of the sealing block 41, improving the service life of the sealing block, and improving the sealing performance of the valve device.

[0050] In one possible implementation, the valve device includes at least two sets of sealing assemblies. Along the radial direction of the valve core 3, the center of the second spherical surface is offset from the centerline of the spindle 33 towards the first spherical surface. In the axial section of the valve device, one set of sealing assemblies 4 corresponds to the plugging portion 32 and abuts against the sidewall defining the valve port 14. The other set of sealing assemblies 4 corresponds to the flow guiding portion 31, and there is a gap between the sealing assemblies 4 and the flow guiding portion 31, or the sealing assemblies 4 and the flow guiding portion 31 are not in force contact, or the compression of the sealing assemblies 4 abutting the flow guiding portion 31 is less than the compression of the sealing assemblies 4 abutting the plugging portion 32. This reduces the pressure of the flow guiding portion 31 on the sealing assemblies 4, improving the service life and stability of the sealing assemblies 4.

[0051] like Figure 2 and Figure 4 As shown, in one possible embodiment, the valve core 3 has a spindle 33, and the bottom of the valve core 3 opposite to the spindle 33 has a mounting hole 34. The housing 1 has a positioning protrusion 131, as shown. Figure 6 As shown, the positioning protrusion 131 has a clearance fit or sliding contact with the wall of the limiting mounting hole 34, with a clearance dimension of L3, and 0.05mm≤L3≤0.1mm. L3 can be 0.05mm, 0.07mm, or 0.1mm, etc., and the value of L3 can be selected according to actual needs, without specific restrictions here. If the value of L3 is too large, the positioning protrusion 131 will not be effectively limited by the mounting hole 34, and the valve core 3 may wobble during rotation. If the value of L3 is too small, it will lead to difficulties in processing and assembly, and the friction between the positioning protrusion 131 and the wall of the limiting mounting hole 34 will be large, which is not conducive to the normal rotation of the valve core 3.

[0052] The valve core 3 has a spindle 33 at its top. The spindle 33 is driven to rotate by a drive assembly, causing the entire valve core 3 to rotate. A positioning protrusion 131 engages with a mounting hole 34; at least a portion of the positioning protrusion 131 extends into the mounting hole 34, thus limiting the rotation of the valve core 3 and improving its stability during rotation. The spindle 33 and mounting hole 34 are located at opposite ends of the valve core 3, simultaneously limiting its rotation from both ends, further enhancing stability. The valve core 3 only needs to be rotatably and limitingly connected to the housing 1; no specific restrictions are imposed. The positioning protrusion 131 can also be located at the bottom of the valve core 3 away from the spindle 33, and the mounting hole 34 can be located in the housing 1.

[0053] like Figure 7As shown, in one possible embodiment, the valve device further includes a flange 2, which is fixedly connected to the housing 1. The flange 2 has a positioning hole 21, and the mandrel 33 and the wall of the positioning hole 21 are in clearance fit or sliding contact, with a clearance range of 0.05mm ≤ L2 ≤ 0.1mm. L2 can be 0.05mm, 0.07mm, or 0.1mm, etc., and the value of L2 can be selected according to actual needs, without specific limitations. If the value of L2 is too large, the mandrel 33 may not be effectively limited, and may deflect during rotation. If the value of L2 is too small, it will lead to difficulties in processing and assembly, and the friction between the mandrel 33 and the wall of the positioning hole 21 will be large, which is not conducive to the normal rotation of the mandrel 33.

[0054] Flange 2 serves as a connection and seal. Specifically, flange 2 is positioned on top of valve core 3 and connected to housing 1. Flange 2 seals the top of mounting cavity 15, and control components can be mounted on top of flange 2 for driving and controlling the rotation of valve core 3. At least a portion of spindle 33 extends into positioning hole 21, thereby limiting spindle 33 and improving the stability of the valve device during operation. Flange 2 and housing 1 can be connected by laser welding. Since plastic materials deform with temperature changes, potentially causing spindle 33 to jam, a reasonable gap can be provided between the inner wall of positioning hole 21 and spindle 33 to prevent jamming. Furthermore, due to machining errors, the friction between spindle 33 and flange 2 can be reduced, decreasing the driving force of the drive assembly and improving its service life. A seal 5 can be provided between flange 2 and spindle 33 to improve the sealing performance of flange 2. The seal 5 can be annularly fitted onto spindle 33.

[0055] like Figure 2 and Figure 5 As shown, in one possible embodiment, the sealing assembly 4 includes a sealing block 41 and a sealing ring 42. The sealing ring 42 is sleeved and fixed to the sealing block 41, and abuts against the housing 1 to achieve a sealing function. Along the radial direction of the valve core 3, the sealing ring 42 can abut against the housing 1, and the sealing block 41 can abut against the plugging part 32. Along the axial direction of the valve core 3, the sealing ring 42 is respectively limited and connected to the flange 2 and the housing 1. The elastic force of the sealing ring compression achieves the abutment between the sealing block 41 and the plugging part 32 to achieve a good sealing effect, thereby realizing the function of controlling fluid flow.

[0056] In the second sealing state, the sealing block 41 and the flow guide 31 are not forcefully attached, or have a gap, or abut against each other. The compression amount of the sealing ring 42 in the sealing assembly 4 that abuts against the flow guide 31 is less than the compression amount of the sealing ring 42 in the sealing assembly 4 that abuts against the sealing part 32, thereby reducing the friction between the flow guide 31 and the sealing block 41 and improving their service life.

[0057] In one possible implementation, the valve ports 14 are circumferentially spaced and symmetrically distributed about the center line of the spindle 33. The number of sealing components 4 is the same as the number of valve ports 14 and is correspondingly arranged. The opening circumferential angle of the flow channel groove 311 of the flow guide 31 is able to conduct at least two adjacent valve ports 14.

[0058] Multiple valve ports 14 can serve as either fluid inlets or outlets. The flow or closure of different valve ports 14 is controlled by the valve core 3, thereby achieving fluid control. The valve ports 14 are positioned corresponding to the blocking section 32 and the flow guiding section 31. When the blocking section 32 closes one valve port 14, the flow guiding section 31 can cooperate with another valve port 14, connecting the flow channel groove 311 to the valve port 14. The opening size of the flow channel groove 311 can be set according to actual needs, and the flow channel groove 311 can simultaneously connect to multiple valve ports 14; no specific limitations are imposed here.

[0059] In one possible implementation, the first and second spheres have the same radius.

[0060] Setting the first and second spherical surfaces to have the same radius makes the overall shape of the valve core 3 more regular and closer to a sphere, enabling the valve core 3 to rotate smoothly, reducing the risk of jamming, and facilitating the processing of the valve core 3. When the first and second spherical surfaces mate with the sealing assembly 4, the force difference will not be too large, which is beneficial to the stable operation of the valve device.

[0061] like Figure 5 As shown, in one possible implementation, the gap between the sealing assembly 4 and the flow guide 31 is less than or equal to 1 mm. The gap between the sealing assembly 4 and the flow guide 31 can be set according to actual needs. Selecting a suitable gap size facilitates the assembly and processing of the valve core 3 and enables the valve core 3 to have good sealing performance.

[0062] like Figure 2 As shown, in one possible implementation, there are at least two valve cores 3, each valve core 3 is arranged axially along the valve device, and the valve cores 3 are drive-connected. Adjacent valve cores 3 are radially limited by a sealing flange 6, which is fixed to the housing 1. A flange 2 is located at the top of the housing 1, and a sealing flange 6 is located between two adjacent valve cores 3. The flange 2 and the sealing flange 6 can simultaneously limit and seal the valve cores 3. Multiple valve cores 3 can be eccentrically arranged, and each valve core 3 can achieve similar functions and effects as described above, which will not be elaborated further here. By setting multiple valve cores 3, the valve device can achieve more precise and complex control of the fluid.

[0063] In one possible implementation, the number of valve cores 3 may be at least one. The valve device also includes a linkage valve core. The valve core 3 and the linkage valve core are arranged along the axial direction of the valve device. The valve core 3 and the linkage valve core are connected in a driving manner. The spherical diameter of the linkage valve core is the same, that is, the sidewalls of the linkage valve core are located in the same spherical surface. The sidewalls are regular in shape. The valve core 3 and the linkage valve core are radially limited by a sealing flange 6. The sealing flange 6 is fixed to the housing 1.

[0064] like Figure 9 and Figure 10 As shown, in one possible embodiment, there are at least two valve cores 3, namely a first valve core 35 and a second valve core 36. The first valve core 35 and the second valve core 36 are axially arranged and drive-connected. The first valve core 35 has a spindle 33, and the bottom of the second valve core 36 opposite to the first valve core 35 has a mounting hole 34. The spindle 33 of the first valve core 35 can extend into the mounting hole 34 of the second valve core 36, thereby achieving a rotatable connection.

[0065] like Figure 2 As shown, the sealing flange 6 is welded to the housing 1. The sealing flange 6 has a limiting hole 61. The second valve core 36 passes through the limiting hole 61 and is connected to the first valve core 35. The valve ports 14 are respectively arranged at intervals along the axial direction and the circumferential direction of the housing 1.

[0066] The mounting hole 34 communicates with the guide groove 311 of the second valve core 36. The housing 1 also has a third connection port 13, and the positioning protrusion 131 extends circumferentially along the wall defining the third connection port 13. The third connection port 13 can be located at the bottom of the housing 1. The positioning protrusion 131 can limit the second valve core 36 and improve the stability during rotation.

[0067] like Figure 3 As shown, in one possible implementation, there are at least two positioning protrusions 131, each extending circumferentially along the third connection port 13. Multiple positioning protrusions 131 can simultaneously achieve a limiting function, and the positioning protrusions 131 are arc-shaped to facilitate the rotation of the valve core 3. The third connection 13 can be located at the bottom of the housing 1 and communicates with the mounting cavity 15.

[0068] The bottom of the first valve core 35 has internal teeth, and the outer wall of the spindle 33 of the second valve core 36 has external teeth. The internal teeth and external teeth mesh with each other, and the first valve core 35 and the second valve core 36 are connected in a transmission manner, and the two can rotate at the same time.

[0069] like Figure 8 As shown, in one possible implementation, the distance between the center of the sphere containing the first sphere and the center of the sphere containing the second sphere along the first direction is L1, where L1 ≤ 1.2 mm. L1 can be 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, or 1.2 mm, etc., and is not specifically limited here.

[0070] The spherical surface where the flow guide 31 is located is the second spherical surface, and the spherical surface where the sealing part 32 is located is the first spherical surface. In the figure, A is the center of the second spherical surface, and B is the center of the first spherical surface, where the center B of the first spherical surface is located on the axis of the mandrel 33. By limiting the distance between the centers of the first and second spherical surfaces, the second spherical surface is offset relative to the first spherical surface, allowing the sealing part 32 and the flow guide 31 to achieve different contact states with the sealing assembly 4. That is, the sealing assembly 4 has a first sealing state and a second sealing state, thereby reducing the wear of the sealing assembly 4 and improving its service life and operational stability.

[0071] In one specific embodiment, the offset distance between the centers of the first and second spherical surfaces can be greater than the gap between the sealing component 4 and the guide portion 31. Considering potential errors in the processing and installation of the guide portion 31 and the sealing component 4, appropriately setting a larger offset distance between the centers of the first and second spherical surfaces can improve the tolerance during processing and installation, enabling the sealing component 4 and the guide portion 31 to achieve a preset fit and reducing the possibility of excessive contact force between the guide portion 31 and the sealing component 4. Of course, in other embodiments, the offset distance between the centers of the first and second spherical surfaces and the gap between the sealing component 4 and the guide portion 31 are not limited, as long as they are within the numerical range sufficient to ensure that the sealing component corresponding to the guide portion is uncompressed or has a compression amount less than that of the sealing component corresponding to the sealing portion.

[0072] The above examples illustrate the principles and implementation methods of the present invention. These embodiments are merely illustrative and intended to aid in understanding the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A valve device, characterized in that, include: The valve assembly comprises a housing (1), a valve core (3), and a sealing assembly (4). The housing (1) has a mounting cavity (15), at least a portion of the valve core (3) is located in the mounting cavity (15), and a valve port (14) is defined on the side wall of the mounting cavity (15). The sealing assembly (4) is disposed between the housing (1) and the valve core (3) along the radial direction of the valve assembly, and the channel of the sealing assembly (4) corresponds to the valve port (14). The housing (1) is connected to the bottom of the valve core (3) and the valve core (3) is able to rotate relative to the housing (1); The valve core (3) includes a flow guide (31), a sealing part (32), and a mandrel (33). The flow guide (31) and the sealing part (32) are arranged along the circumferential direction of the valve core (3). The flow guide (31) has a flow channel groove (311) that can communicate with the valve port (14). The sealing part (32) can block the valve port (14). The portion of the sealing part (32) that contacts the sealing assembly (4) is defined as a first spherical surface. The flow guide (31) includes a second spherical surface. The center of the first spherical surface is located at the centerline of the mandrel (33). The direction extending from the center of the flow guide (31) to the center of the sealing part (32) is defined as... With the first direction R, along the first direction R of the valve core (3), the center of the second spherical surface deviates from the center line of the mandrel (33) in a direction closer to the first spherical surface. The sealing assembly (4) has a first sealing state and a second sealing state. In the first sealing state, the sealing assembly (4) abuts against the plug (32) and the side wall defining the valve port (14). In the second sealing state, there is a gap between the sealing assembly (4) and the guide (31), or the sealing assembly (4) and the guide (31) are not in force contact, or the compression of the sealing assembly (4) in the second sealing state is less than the compression of the sealing assembly (4) in the first sealing state.

2. A valve device, characterized in that, include: The valve assembly comprises a housing (1), a valve core (3), and at least two sets of sealing assemblies (4). The housing (1) has a mounting cavity (15), at least a portion of the valve core (3) is located in the mounting cavity (15), and the sidewall defining the mounting cavity (15) has a valve port (14). Along the radial direction of the valve assembly, the sealing assembly (4) is disposed between the housing (1) and the valve core (3), and the channel of the sealing assembly (4) corresponds to the valve port (14). The housing (1) is connected to the bottom of the valve core (3) and the valve core (3) is able to rotate relative to the housing (1); The valve core (3) includes a flow guide (31), a sealing part (32), and a mandrel (33). The flow guide (31) and the sealing part (32) are arranged along the circumferential direction of the valve core (3). The flow guide (31) has a flow channel groove (311) that can communicate with the valve port (14). The sealing part (32) can block the valve port (14). The portion of the sealing part (32) that contacts the sealing assembly (4) is defined as a first spherical surface. The flow guide (31) includes a second spherical surface. The center of the first spherical surface is located at the centerline of the mandrel (33). The direction extending from the center of the flow guide to the center of the sealing part (32) is defined as a first direction R. 3) In the first direction R, the center of the second sphere deviates from the centerline of the mandrel (33) in a direction closer to the first sphere. In the axial section of the valve device, one set of the sealing components corresponds to the plug (32), and the sealing component (4) abuts against the plug (32) and the side wall defining the valve port (14); another set of the sealing components corresponds to the guide (31), and there is a gap between the sealing component (4) and the guide (31), or the sealing component (4) and the guide (31) are not in force contact, or the compression of the sealing component (4) abutting against the guide (31) is less than the compression of the sealing component (4) abutting against the plug (32).

3. The valve device as described in claim 1 or 2, characterized in that, The valve core (3) has a mounting hole (34) at the bottom away from the spindle (33), and the housing (1) has a positioning protrusion (131). The positioning protrusion (131) is in clearance fit or sliding contact with the wall that defines the mounting hole (34). The size of the clearance is L3, and 0.05mm≤L3≤0.1mm.

4. The valve device as claimed in claim 3, characterized in that, It also includes a flange (2), which is fixedly connected to the housing (1). The flange (2) has a positioning hole (21). The mandrel (33) and the wall portion defining the positioning hole (21) are in clearance fit or sliding contact, with a clearance range of 0.05mm≤L2≤0.1mm.

5. The valve device as claimed in claim 4, characterized in that, The sealing assembly (4) includes a sealing block (41) and a sealing ring (42). The sealing ring (42) is sleeved and fixed to the sealing block (41). The sealing block (41) has a channel corresponding to the valve port (14). Along the radial direction of the valve core (3), the sealing ring (42) can abut against the housing (1). The sealing block (41) can abut against the plugging part (32). Along the axial direction of the valve core (3), the sealing ring (42) is respectively limited and connected to the flange (2) and the housing (1). In the second sealing state, the sealing block (41) and the flow guide (31) are not forcefully attached or have a gap or abut against each other. The compression amount of the sealing ring (42) in the sealing assembly (4) that abuts against the flow guide (31) is less than the compression amount of the sealing ring (42) in the sealing assembly (4) that abuts against the plugging part (32).

6. The valve device as claimed in claim 5, characterized in that, The valve ports (14) are circumferentially spaced and symmetrically distributed about the center line of the spindle (33). The number of sealing components (4) is the same as the number of valve ports (14) and is arranged accordingly. The opening circumferential angle of the flow channel groove (311) of the flow guide (31) can conduct at least two adjacent valve ports (14).

7. The valve device according to any one of claims 1-6, characterized in that, The first sphere and the second sphere have the same radius.

8. The valve device according to any one of claims 1-6, characterized in that, The gap between the sealing component (4) and the flow guide (31) is less than or equal to 1 mm.

9. The valve device according to any one of claims 1-6, characterized in that, The number of valve cores (3) is at least two. Each valve core (3) is arranged along the axial direction of the valve device. Each valve core (3) is connected in a transmission manner. Adjacent valve cores (3) are radially limited by a sealing flange (6). The sealing flange (6) is fixed to the housing (1). Alternatively, the number of valve cores (3) is at least one, and the valve device further includes a linkage valve core. The valve cores (3) and the linkage valve core are arranged along the axial direction of the valve device. The valve cores (3) and the linkage valve core are connected in a driving manner. The spherical diameters of the linkage valve cores are the same. The valve cores (3) and the linkage valve core are radially limited by a sealing flange (6). The sealing flange (6) is fixed to the housing (1).

10. The valve device as claimed in claim 9, characterized in that, The number of valve cores (3) is at least two, namely a first valve core (35) and a second valve core (36). The first valve core (35) and the second valve core (36) are axially arranged and connected in transmission. The first valve core (35) has a spindle (33), and the bottom of the second valve core (36) opposite to the first valve core (35) has a mounting hole (34). The sealing flange (6) is welded to the housing (1), the sealing flange (6) has a limiting hole (61), the second valve core (36) passes through the limiting hole (61) and is connected to the first valve core (35) in a driving connection, and the valve ports (14) are respectively arranged at intervals along the axial direction of the housing (1) and the circumferential direction of the housing (1); The mounting hole (34) communicates with the flow channel groove (311) of the second valve core (36), and the housing (1) also has a third connection port (13), and the positioning protrusion (131) extends circumferentially along the wall defining the third connection port (13).

11. The valve device as claimed in claim 10, characterized in that, The number of the positioning protrusions (131) is at least two, and each positioning protrusion (131) extends circumferentially along the third connection port (13); The bottom of the first valve core (35) has internal teeth, and the outer wall of the spindle (33) of the second valve core (36) has external teeth. The first valve core (35) and the second valve core (36) are connected in a driving manner.

12. The valve device according to any one of claims 1-6, characterized in that, The distance between the center of the sphere containing the first sphere and the center of the sphere containing the second sphere along the first direction R is L1, where L1 ≤ 1.2 mm.

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