Valve seat of multi-way valve and four-way reversing valve

Abstract

The invention provides a valve seat of a multi-way valve and a four-way reversing valve, and relates to the technical field of heat pump type air conditioners. A valve seat of the multi-way valve comprises a body part and a plurality of matching parts, the matching parts protrude out of one side of the body part in the thickness direction of the body part, interval spaces are formed between the matching parts, the matching parts and the body part are fixedly connected or are of an integrated structure, and the body part is provided with a plurality of first via holes formed at intervals. The first via hole penetrates through the body part in the thickness direction of the body part, the matching part is provided with a second via hole, the second via hole penetrates through the matching part in the thickness direction of the matching part, and the first via hole is communicated with the second via hole. The four-way reversing valve comprises the valve seat of the multi-way valve. According to the valve seat of the multi-way valve and the four-way reversing valve, the cost can be reduced, and heat transfer between connecting pipes can be reduced.

Description

Technical Field

[0001] This invention relates to the field of multi-way valve technology, and more specifically, to a valve seat for a multi-way valve and a four-way directional valve. Background Technology

[0002] In heat pump air conditioners, the four-way reversing valve is a key component for switching between the system's cooling and heating cycles. By switching the four-way reversing valve, the mutual switching between cooling and heating can be achieved.

[0003] A pneumatic four-way directional valve typically includes a valve body, a valve seat fixed to the inner wall of the valve body, and an inlet pipe, with a connecting pipe mounted on the valve seat and connected to the valve body. Most existing valve seats are made of copper; however, copper valve seats have two main drawbacks: higher cost and, due to copper's excellent thermal conductivity, easy heat transfer between different connecting pipes via the valve seat, resulting in significant heat loss. Summary of the Invention

[0004] The purpose of this invention is to provide a valve seat for a multi-way valve and a four-way directional valve that can reduce costs and help reduce heat transfer between pipes.

[0005] In one aspect, the present invention provides a valve seat for a multi-way valve. The valve seat includes a body portion and a plurality of mating portions. The mating portions are disposed protruding from one side of the body portion along the thickness direction. There are gaps between the plurality of mating portions. The mating portions and the body portion are fixedly connected or are an integral structure. The body portion has a plurality of first through holes disposed at intervals. The first through holes penetrate the body portion along the thickness direction. The mating portions have second through holes that penetrate the mating portions along the thickness direction. The first through holes and the second through holes communicate with each other.

[0006] In another aspect, the present invention provides a four-way directional valve, which includes a valve body, a connecting pipe, and a valve seat for a multi-way valve. The valve seat for the multi-way valve includes a main body and a plurality of mating parts. The mating parts are provided to protrude from one side of the main body along the thickness direction. There are gaps between the plurality of mating parts. The mating parts and the main body are fixedly connected or are an integral structure. The main body has a plurality of first through holes spaced apart. The first through holes penetrate the main body along the thickness direction. The mating parts have second through holes that penetrate the mating parts along the thickness direction. The first through holes and the second through holes are connected. The mating parts are disposed away from the outer wall of the main body and are mated with the inner wall of the valve body. The outer peripheral wall of the connecting pipe is mated with the hole wall of the second through hole.

[0007] The beneficial effects of this invention include:

[0008] The valve seat of the multi-way valve provided in this application includes a body portion with a first through hole and a mating portion with a second through hole, wherein the first and second through holes are connected, and there are gaps between the multiple mating portions. Thus, the valve seat of the multi-way valve of this application can be connected to a corresponding connecting pipe through the second through hole, and the connecting pipe can be connected to the inner cavity of the valve body through the first through hole, enabling normal fluid flow. Because this application has gaps located between the multiple mating portions, it saves material on the valve seat, reducing its cost. Furthermore, the gaps disrupt the continuity of the multiple mating portions, thus separating different connecting pipes, helping to reduce heat transfer between pipes, improve heat transfer between adjacent pipes, and reduce interference between different pipelines of the multi-way valve seat.

[0009] The four-way directional valve provided in this application, by adopting a valve seat with a spaced interval, can save the material of the valve seat of the multi-way valve, reduce the cost of the valve seat of the multi-way valve, and thus reduce the cost of the four-way directional valve; it can also separate the pipes connected to different second through holes, which helps to reduce heat transfer between pipes and improve the heat transfer problem between adjacent pipes. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is one of the structural schematic diagrams of the valve seat of a multi-way valve provided in an embodiment of the present invention;

[0012] Figure 2 This is a second schematic diagram of the valve seat structure of a multi-way valve provided in one embodiment of the present invention;

[0013] Figure 3 This is a third schematic diagram of the valve seat structure of a multi-way valve provided in one embodiment of the present invention;

[0014] Figure 4 This is a schematic diagram of the structure of a four-way directional valve provided in one embodiment of the present invention;

[0015] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0016] Figure 6 One of the schematic diagrams of the valve seat of a multi-way valve provided in another embodiment of the present invention;

[0017] Figure 7 A second schematic diagram of the valve seat structure of a multi-way valve provided in another embodiment of the present invention;

[0018] Figure 8 A third schematic diagram of the valve seat structure of a multi-way valve provided in another embodiment of the present invention;

[0019] Figure 9 This is a schematic diagram of the structure of a four-way directional valve provided in another embodiment of the present invention;

[0020] Figure 10 for Figure 9 A magnified view of a section at point B in the middle.

[0021] Icons: 10-Body part; 11-First through hole; 12-Limiting step; 20-Mating part; 21-Gap space; 22-Second through hole; 23-Connecting cylinder; 201-Outer wall surface; a-First direction; 200-Valve body; 210-Third through hole; 220-Inner cavity; 230-Interface; 300-Connecting pipe; 410-Driver; 420-Slider; 421-Cavity; 500-Welding ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this invention, it should be noted that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Please refer to Figure 1 or Figure 6 This embodiment provides a valve seat for a multi-way valve. The valve seat includes a body portion 10 and a plurality of mating portions 20. The mating portions 20 are provided to protrude from one side of the body portion 10 along the thickness direction. There is a space 21 between the plurality of mating portions 20. The mating portions 20 and the body portion 10 are fixedly connected or are an integral structure. The body portion 10 has a plurality of first through holes 11 arranged at intervals. The first through holes 11 penetrate the body portion 10 along the thickness direction. The mating portions 20 have second through holes 22. The second through holes 22 penetrate the mating portions 20 along the thickness direction. The first through holes 11 and the second through holes 22 are connected.

[0028] It should be noted that the valve seat of the multi-way valve provided in this application can be applied to the four-way reversing valve of a heat pump air conditioner, or to other multi-way valves. In other words, this application does not limit the specific application scenarios of the valve seat of the multi-way valve. Those skilled in the art can apply it to any valve that can be adapted to it as needed.

[0029] The valve seat of the multi-way valve includes a body portion 10 and a mating portion 20, wherein the body portion 10 and the mating portion 20 are stacked, and the body portion 10 is provided with a plurality of first through holes 11. The number of first through holes 11 is not limited in this application and can be set according to the application scenario of the valve seat of the multi-way valve.

[0030] It should be understood that when there are multiple first through holes 11, the multiple first through holes 11 should be spaced apart from each other. The central axes of the multiple first through holes 11 are parallel to each other, so as to avoid positional interference between the multiple pipes 300 when they are connected to the pipe 300 through the valve seat of the multi-way valve.

[0031] Furthermore, in this embodiment, the first through hole 11 is disposed through the thickness direction of the body portion 10, such as... Figure 1 and Figure 3 As shown. Thus, one end of the first through hole 11 can communicate with the inner cavity 220 of the valve body 200, and the other end of the first through hole 11 can be used to communicate with the second through hole 22.

[0032] The mating part 20 protrudes from one side of the body part 10 along its thickness direction, and is connected to the opposing walls of the body part 10. Optionally, in this embodiment, the body part 10 and the mating part 20 are fixedly connected as a single structure. This improves the overall structural strength of the valve seat of the multi-way valve. Furthermore, the body part 10 and the mating part 20 can be integrally molded using injection molding, which eliminates the need for connecting the body part 10 and the mating part 20, facilitating processing and fabrication. It also eliminates the need for processing the first through hole 11, the second through hole 22, and the spacer 21; only the molding die needs to be adjusted, making processing more convenient and faster.

[0033] It should be noted that, in this embodiment, the mating part 20 includes two outer walls disposed opposite to each other. One outer wall (i.e., the outer wall disposed facing the body part 10) is connected to the body part 10, and the other outer wall (i.e., the outer wall disposed opposite to the body part 10) is disposed to mate with the inner wall of the inner cavity 220 of the valve body 200.

[0034] The mating part 20 has a second through hole 22. In this embodiment, the second through hole 22 penetrates the mating part 20 along its thickness direction, such as... Figure 2 and Figure 3 As shown.

[0035] The multiple mating parts 20 are spaced apart by a gap 21. That is, the gap 21 is located on the outer periphery of the mating parts 20. In this embodiment, the gap 21 is not connected to the second through hole 22. Thus, the gap 21 can serve as a spacer, reducing heat transfer between adjacent pipes 300 and reducing heat loss caused by heat transfer through the mating parts 20.

[0036] In addition, it should be noted that the space 21 provided in this application can disrupt the integrity of the valve seat of the multi-way valve and break the continuity of multiple mating parts 20. As a result, when the heat of the pipe 300 located in one of the second through holes 22 is transferred through the valve seat of the multi-way valve, the heat transfer will be hindered to a certain extent because the two adjacent mating parts 20 are discontinuous, thereby reducing heat loss and avoiding heat crosstalk between different pipes 300.

[0037] Furthermore, the presence of the space 21 prevents the valve seat of the multi-way valve from directly contacting the valve body 200 in the area where the space 21 is located. This reduces the contact area between the valve seat and the valve body 200, improving heat dissipation at the connection point while still meeting the welding requirements. Additionally, compared to the entire arched surface of the valve seat fitting snugly against the inner wall of the valve body 200's cavity 220, material is saved in the area of ​​the space 21, reducing costs.

[0038] In this embodiment, the mating part 20 includes a plurality of spaced-apart parts, and the second through hole 22 also includes a plurality of parts. The plurality of second through holes 22 should be relatively spaced apart, so that when the plurality of pipes 300 are connected through the plurality of second through holes 22, the plurality of pipes 300 can be prevented from interfering with each other.

[0039] Furthermore, the corresponding second through hole 22 is connected to the first through hole 11. In this way, the second through hole 22 can be connected to the inner cavity 220 of the valve body 200 through the first through hole 11 to realize fluid transmission. It should be understood that when there are multiple first through holes 11 and multiple second through holes 22, the multiple first through holes 11 and the multiple second through holes 22 should be connected in a one-to-one correspondence.

[0040] Additionally, it should be noted that in this embodiment, if the number of first through holes 11 and second through holes is the same and they are connected in a one-to-one correspondence, then each pipe 300 connected to the second through hole 22 can be connected to the inner cavity 220 of the valve body 200 through its corresponding first through hole 11 to achieve fluid transfer.

[0041] In summary, the valve seat of the multi-way valve provided in this application includes a body portion 10 with a first through hole 11 and a mating portion 20 with a second through hole 22, and the first through hole 11 and the second through hole 22 are connected, and there is also a space 21 between the multiple mating portions 20. In this way, the valve seat of the multi-way valve of this application can be connected to the corresponding pipe 300 through the second through hole 22, and the pipe 300 can be connected to the inner cavity 220 of the valve body 200 through the first through hole 11 to realize the normal flow of fluid. Since this application has a spacer 21, and the spacer 21 is located between multiple mating parts 20, on the one hand, it can save the material of the valve seat of the multi-way valve and reduce the cost of the valve seat of the multi-way valve; on the other hand, the spacer 21 can destroy the integrity of the valve seat of the multi-way valve, thereby interrupting the continuity of the mating parts 20. Thus, the spacer 21 can also be used to separate different pipes 300, which helps to reduce heat transfer between pipes 300, improve the heat transfer problem between adjacent pipes 300, and reduce the interference between different pipelines of the valve seat of the multi-way valve.

[0042] In addition, it should be noted that due to the setting of the space 21, the area of ​​the valve seat of the multi-way valve located in the space 21 can not directly contact the valve body 200. In this way, the contact area between the valve seat and the valve body 200 of the multi-way valve can be reduced. On the basis of meeting the welding conditions between the valve seat and the valve body 200 of the multi-way valve, the heat dissipation at the connection between the valve seat and the valve body 200 of the multi-way valve can be improved.

[0043] In addition, to ensure a better and more secure fit between the valve seat and valve body 200 of the multi-way valve, the extended surface of the mating part 20 away from the outer wall surface 201 of the main body 10 may optionally be an arc-shaped surface. Please refer to... Figure 2 and Figure 6 As shown, when the valve seat of the multi-way valve in this application is applied to a four-way directional valve, the outer wall surface 201 is configured to cooperate with the inner wall of the inner cavity 220 of the valve body 200 of the four-way directional valve. In this way, the connection between the valve seat and the valve body 200 of the multi-way valve is more stable and the fit is closer.

[0044] In this embodiment, the specific location of the interval space 21 is not limited, as long as it can serve as an interval. The following will illustrate the location of the interval space 21 with different examples.

[0045] For example, in a first feasible implementation, the interval space 21 may be provided only between two adjacent mating parts 20, that is, optionally, the interval space 21 is provided between two adjacent mating parts 20.

[0046] In other words, in this implementation, there are at least two of each of the first vias 11 and the second vias 22, and the first vias 11 and the second vias 22 are connected in a one-to-one correspondence. In this case, each space 21 is located between two adjacent mating parts 20.

[0047] In this implementation, since there is a gap space 21 between two adjacent mating parts 20, the gap space 21 can more effectively play a blocking role, effectively solve the heat transfer problem between adjacent pipes 300, and reduce the interference between different pipes of the valve seat of the multi-way valve.

[0048] Of course, the space 21 may only include the portion located between two adjacent mating parts 20, or it may include other portions in addition to the portion located between two adjacent mating parts 20. This application does not limit this.

[0049] In this case, for example, in a second feasible implementation, the interval space 21 may optionally include at least two first spaces, which are respectively located on both sides of the corresponding mating part 20.

[0050] In other words, the partition space 21 has at least two first spaces, with different first spaces located on different sides of the mating part 20. Because this implementation has at least two first spaces, it can isolate the valve from at least both sides. This further improves the continuity of the valve seat of the multi-way valve due to the partition space 21, and further reduces the contact area between the mating part 20 and the valve body 200, thereby effectively reducing heat loss and improving energy efficiency.

[0051] For example, in a third feasible implementation, the spacing space 21 may optionally be annular and arranged around the corresponding mating part 20.

[0052] In other words, in this implementation, the annular space 21 can completely surround the mating part 20, thereby completely blocking the pipe 300 connected to the second through hole 22 and preventing the heat of the pipe 300 from being transferred from the mating part 20 to other pipes 300 in the second through hole 22. This implementation has a more obvious and effective blocking effect.

[0053] It should be noted that in this embodiment, the space 21 not only serves to block heat transfer, but also saves materials. The space 21 reduces the material required for the corresponding mating parts 20, thereby reducing processing costs.

[0054] Furthermore, in this embodiment, the specific shape of the spacer 21 is not limited, as long as it can effectively block heat transfer. The specific shape of the spacer 21 will be illustrated by example below. Of course, it should be understood that the following is merely an example and is not a limitation on the specific shape of the spacer 21 in this application.

[0055] For example, in one feasible implementation, the spacing space 21 may optionally extend in a straight line or in a curved line.

[0056] In other words, in this method, the interval space 21 can be linear or curved. When the interval space 21 is linear, it can be referenced... Figure 2 and Figure 3 As shown.

[0057] When the interval space 21 is a curve, it can be an arc, a hyperbola, or any other feasible form. This application does not limit the specific type of curve.

[0058] It should be noted that straight or curved intervals 21 are easier to process and can make the overall structure of the valve seat of the multi-way valve more complete.

[0059] Alternatively, in the second feasible implementation, as follows: Figures 6 to 8 The mating part 20 includes a connecting cylinder 23, any two adjacent connecting cylinders 23 are spaced apart, the wall of the second through hole 22 includes the inner wall of the connecting cylinder 23, and the outer peripheral area of ​​the connecting cylinder 23 forms a space 21.

[0060] In other words, in this implementation, the mating part 20 includes a connecting cylinder 23, the inner hole of each connecting cylinder 23 is a corresponding second through hole 22, and the area around the outer periphery of the connecting cylinder 23 forms a gap space 21. In short, the entire portion outside the outer periphery of the connecting cylinder 23 is the gap space 21, such as... Figure 6 and Figure 7 As shown, the area of ​​the space 21 is larger, the heat transfer barrier effect is more significant, and the risk of heat loss can be further reduced.

[0061] Furthermore, in order to further improve the heat insulation effect and reduce heat loss, the space 21 may optionally extend along the arrangement direction perpendicular to the mating parts 20, and the wall of the space 21 may include the side walls of two adjacent mating parts 20.

[0062] In other words, the space 21 extends through the mating part 20 along the first direction a, such as... Figure 2 and Figure 6 As shown, the first direction a, the thickness direction of the mating part 20, and the arrangement direction of two adjacent mating parts 20 are perpendicular to each other. In this way, the space 21 occupies a larger area in the valve seat of the multi-way valve, which can further improve the heat insulation effect and reduce heat loss.

[0063] To facilitate fluid flow, the central axes of the interconnected first through-hole 11 and second through-hole 22 may optionally coincide, such as... Figure 3 and Figure 8 As shown. This makes it easier for the fluid to flow.

[0064] In this embodiment, optionally, please refer to Figures 3 to 5 The diameter of the first through hole 11 is smaller than the diameter of the second through hole 22, and the portion of the body part 10 exposed from the second through hole 22 forms a limiting step 12.

[0065] It should be noted that when the valve seat of this multi-way valve is applied to a four-way directional valve, the aforementioned limiting step 12 can be configured to limit the movement of the four-way directional valve's connecting pipe 300.

[0066] The diameter of the first through hole 11 is smaller than the diameter of the second through hole 22. Thus, the portion of the body 10 exposed through the second through hole 22 can form a limiting step 12. When the connector 300 is inserted into the second through hole 22, this limiting step 12 can limit the end of the connector 300 extending into the second through hole 22. Figure 4 and Figure 5 As shown. This facilitates the connection and limiting of the pipe 300 to the valve seat of the multi-way valve.

[0067] It should be noted that when the mating part 20 includes the connecting cylinder 23, the extension surface of the connecting cylinder 23 that is away from the outer wall surface 201 of the main body part 10 is an arc-shaped surface.

[0068] This embodiment also provides a four-way reversing valve, which includes a valve body 200, a connecting pipe 300, and the valve seat of the aforementioned multi-way valve. The valve seat of the multi-way valve includes a body portion 10 and multiple mating portions 20. The mating portions 20 are arranged to protrude from one side of the body portion 10 along the thickness direction. There is a space 21 between the multiple mating portions 20. The mating portions 20 and the body portion 10 are fixedly connected or are an integral structure. The body portion 10 has multiple first through holes 11 arranged at intervals. The first through holes 11 penetrate the body portion 10 along the thickness direction. The mating portions 20 have second through holes 22. The second through holes 22 penetrate the mating portions 20 along the thickness direction. The first through holes 11 and the second through holes 22 are connected. The mating portions 20 are disposed away from the outer wall of the body portion 10 and are mated with the inner wall of the valve body 200. The outer peripheral wall of the connecting pipe 300 is mated with the hole wall of the second through hole 22. The valve seat of this multi-way valve has a space 21 that can block heat transfer. Therefore, the four-way directional valve using this valve seat can save material for the multi-way valve seat, reduce the cost of the multi-way valve seat, and thus reduce the cost of the four-way directional valve. It can also separate the pipes 300 connected to different second through holes 22, which helps to reduce heat transfer between pipes 300 and improve the heat transfer problem between adjacent pipes 300. Since the specific structure and technical effects of the valve seat of this multi-way valve have been described and explained in detail above, they will not be repeated here.

[0069] In this embodiment, the valve seat of the multi-way valve is located inside the inner cavity 220 of the valve body 200, and the mating part 20 of the valve seat of the multi-way valve is opposite to the outer wall of the main body 10 and mats with the inner wall of the inner cavity 220 of the valve body 200.

[0070] Alternatively, please refer to Figure 4 and Figure 5 As shown, the valve body 200 has an inner cavity 220 and an interface 230. The inner cavity 220 is connected to the interface 230. The four-way reversing valve also includes a drive member 410 and a slider 420 disposed in the inner cavity 220. The drive member 410 and the slider 420 are fixedly connected or limitedly connected. The drive member 410 can drive the slider 420 to slide back and forth. The slider 420 has a cavity 421 on the side facing the valve seat of the multi-way valve. The cavity 421 can connect any two adjacent pipes 300, and the remaining pipes 300 are connected to the interface 230 through the inner cavity 220.

[0071] In this embodiment, the inner cavity 220 and the interface 230 are connected, and an access pipe can be connected to the interface 230. The interface 230 and the connecting pipe 300 are arranged opposite to each other.

[0072] The four-way directional valve also includes a drive element 410 and a slider 420. The drive element 410 is slidably connected to the cavity wall of the inner cavity 220, and the slider 420 is fixedly connected to or limited to the drive element 410. In this way, the sliding of the drive element 410 in the inner cavity 220 can drive the slider 420 to slide.

[0073] In this embodiment, the slider 420 slides and seals against the valve seat of the multi-way valve toward the wall of the interface 230. When the drive member 410 drives the slider 420 to move radially along the pipe 300, the cavity 421 can connect any two adjacent pipes 300, and the remaining pipes 300 are connected to the interface 230 through the inner cavity 220. Thus, the interface 230 can be selectively connected to a certain pipe 300, while the other two pipes 300 can be connected to each other.

[0074] It should be noted that this application does not limit the specific shape of the cavity 421; for example, it can be a spherical crown, a cuboid, an ellipsoidal crown, or other known shapes. The slider 420 can be made of a non-metallic material, such as nylon.

[0075] The driving method of the drive component 410 is not limited, and it can be pneumatically driven, hydraulically driven, or other forms. The structural form of the drive component 410 is also not limited. For example, it can be a piston structure. For instance, the drive component 410 includes a piston and a piston rod connected to the piston, and the slider 420 is connected to the piston rod (for example, connected to the middle or end position of the piston rod).

[0076] Optionally, the valve body 200 further includes a plurality of third through holes 210, the third through holes 210 extending radially through the side wall of the valve body 200; one end of the connecting pipe 300 passes through the third through hole 210, and the outer peripheral wall of the connecting pipe 300 mates with the hole wall of the second through hole 22; the extension surface of the mating part 20 away from the outer wall surface 201 of the body part 10 is an arc-shaped surface, the cavity wall surface of the inner cavity 220 is an arc-shaped surface, the outer wall surface 201 and the cavity wall surface of the inner cavity 220 constitute a welding surface, and the mating part 20 is fixed in the valve body 200 by welding.

[0077] This application facilitates the insertion of one end of the pipe 300 by providing a third through hole 210 on the valve body 200.

[0078] In this embodiment, the diameter of the third via 210 is equal to the diameter of the second via 22, and the central axis of the third via 210 coincides with the central axis of the second via 22.

[0079] In addition, it should be noted that the number of third vias 210 is the same as the number of second vias 22, and they are in a one-to-one correspondence. The corresponding third vias 210 and second vias 22 are connected.

[0080] The extended surface of the mating part 20, which is away from the outer wall surface 201 of the main body part 10, is an arc-shaped surface, and the cavity wall surface of the inner cavity 220 is also an arc-shaped surface. In this way, the shapes of the mating part 20 and the inner cavity 220 fit perfectly when they mate, which can improve the fit between the mating part 20 and the inner cavity 220. As a result, the welding surface formed by the outer wall surface 201 and the cavity wall surface of the inner cavity 220 is more convenient to weld and the weld is more reliable and stable.

[0081] Optionally, the central axes of the interconnected first through-hole 11 and second through-hole 22 coincide, the diameter of the first through-hole 11 is smaller than the diameter of the second through-hole 22, and the portion of the body 10 exposed from the second through-hole 22 forms a limiting step 12; the central axes of the third through-hole 210 and the second through-hole 22 coincide, one end of the connector 300 passes through the third through-hole 210 and engages with the limiting step 12. This application, by setting the limiting step 12, facilitates the limiting engagement of the connector 300 with the valve seat of the multi-way valve, enabling the connector 300 to be quickly positioned when engaging with the valve seat of the multi-way valve.

[0082] Please refer to Figure 9 and Figure 10 Optionally, the four-way directional valve of this application also includes a welding ring 500 during manufacturing. The welding ring 500 is located between the limiting step 12 and the connecting pipe 300. The connecting pipe 300, the valve seat of the multi-way valve, and the valve body 200 are all made of copper. The four-way directional valve melts the welding ring 500 through a brazing process and welds the valve seat of the multi-way valve and the connecting pipe 300. In addition, some of the solder enters the outer wall surface 201 and the cavity wall surface of the inner cavity 220 to form a welding surface, thereby welding and sealing the valve seat and valve body 200 of the multi-way valve.

[0083] In other words, the limiting step 12 of this application can also be used to place the welding ring 500. In this way, when one end of the connecting pipe 300 is brazed to the valve seat of the multi-way valve, the welding ring 500 can be placed at the limiting step 12, which facilitates the welding of the valve seat of the multi-way valve and the connecting pipe 300. It also allows some of the solder to enter the welding surface formed by the outer wall surface 201 and the cavity wall surface of the inner cavity 220, so as to weld and seal the valve seat and valve body 200 of the multi-way valve, thereby improving the welding reliability.

[0084] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0085] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A valve seat for a multi-way valve, characterized in that, The device includes a main body (10) and a plurality of mating parts (20). The mating parts (20) are provided to protrude from one side of the main body (10) along the thickness direction. There are gaps (21) between the plurality of mating parts (20). The mating parts (20) and the main body (10) are fixedly connected or are an integral structure. The main body (10) has a plurality of first through holes (11) arranged at intervals. The first through holes (11) penetrate the main body (10) along the thickness direction. The mating parts (20) have second through holes (22). The second through holes (22) penetrate the mating parts (20) along the thickness direction. The first through holes (11) and the second through holes (22) are connected.

2. The valve seat of the multi-way valve according to claim 1, characterized in that, The extension surface of the mating part (20) that is away from the outer wall surface (201) of the main body part (10) is an arc-shaped surface.

3. The valve seat of the multi-way valve according to claim 1 or 2, characterized in that, The mating part (20) includes a connecting cylinder (23), any two adjacent connecting cylinders (23) are spaced apart, the hole wall of the second through hole (22) includes the inner wall of the connecting cylinder (23), and the outer peripheral area of ​​the connecting cylinder (23) forms the space (21).

4. The valve seat of the multi-way valve according to claim 1 or 2, characterized in that, The space (21) extends in a direction perpendicular to the arrangement of the mating parts (20), and the wall forming the space (21) includes the side walls of two adjacent mating parts (20).

5. The valve seat of the multi-way valve according to claim 3 or 4, characterized in that, The central axes of the interconnected first through hole (11) and the second through hole (22) coincide, the diameter of the first through hole (11) is smaller than the diameter of the second through hole (22), and the portion of the body part (10) exposed from the second through hole (22) forms a limiting step (12).

6. A four-way directional valve, characterized in that, The system includes a valve body (200), a connecting pipe (300), and a valve seat for a multi-way valve. The valve seat of the multi-way valve includes a body part (10) and multiple mating parts (20). Each mating part (20) protrudes from one side of the body part (10) along the thickness direction. There is a space (21) between the multiple mating parts (20). The mating parts (20) and the body part (10) are fixedly connected or are an integral structure. The body part (10) has multiple first through holes (11) spaced apart. Each first through hole (11) penetrates the body part (10) along the thickness direction. Each mating part (20) has a second through hole (22). Each second through hole (22) penetrates the mating part (20) along the thickness direction. The first through holes (11) and the second through holes (22) are connected. The mating part (20) is disposed away from the outer wall of the main body part (10) and is configured to mate with the inner wall of the valve body (200), and the outer peripheral wall of the connecting pipe (300) mates with the hole wall of the second through hole (22).

7. The four-way directional valve according to claim 6, characterized in that, The valve body (200) has an inner cavity (220) and an interface (230). The inner cavity (220) is connected to the interface (230). The four-way reversing valve also includes a drive member (410) and a slider (420) disposed in the inner cavity (220). The drive member (410) and the slider (420) are fixedly connected or limitedly connected. The drive member (410) can drive the slider (420) to slide back and forth. The slider (420) has a cavity (421) on the side facing the valve seat of the multi-way valve. The cavity (421) can connect any two adjacent pipes (300), and the remaining pipes (300) are connected to the interface (230) through the inner cavity (220).

8. The four-way directional valve according to claim 7, characterized in that, The valve body (200) further includes a plurality of third through holes (210), the third through holes (210) penetrating the side wall of the valve body (200) radially; one end of the connecting pipe (300) passes through the third through hole (210), and the outer peripheral wall of the connecting pipe (300) mates with the hole wall of the second through hole (22); The extension surface of the mating part (20) opposite to the outer wall surface (201) of the main body part (10) is an arc-shaped surface, and the cavity wall surface of the inner cavity (220) is an arc-shaped surface. The outer wall surface (201) and the cavity wall surface of the inner cavity (220) form a welding surface. The mating part (20) is fixed to the valve body (200) by welding.

9. The four-way directional valve according to claim 8, characterized in that, The central axes of the first through hole (11) and the second through hole (22) are coincident, the diameter of the first through hole (11) is smaller than the diameter of the second through hole (22), and the portion of the body part (10) exposed from the second through hole (22) forms a limiting step (12); the central axes of the third through hole (210) and the second through hole (22) are coincident, one end of the connector (300) passes through the third through hole (210) and cooperates with the limiting step (12).

10. The four-way directional valve according to claim 9, characterized in that, During the preparation of the four-way reversing valve, a welding ring (500) is also included. The welding ring (500) is located between the limiting step (12) and the connecting pipe (300). The connecting pipe (300), the valve seat of the multi-way valve, and the valve body (200) are all made of copper. The four-way reversing valve melts the welding ring (500) through a brazing process and welds the valve seat of the multi-way valve and the connecting pipe (300). In addition, some of the solder enters the outer wall surface (201) and the cavity wall surface of the inner cavity (220) to form a welding surface, thereby welding and sealing the valve seat of the multi-way valve and the valve body (200).

Images