Valve device

Abstract

The invention provides a valve device. The valve device comprises a main valve component, a bypass valve component and a communicating pipe. When the medium pressure difference of the inflow runner part and the outflow runner part of the main valve part reaches the preset value, the first valve port part of the bypass valve part can be opened for pressure relief, the bypass valve part and the main valve part are integrated, and the problem that the pressure relief function is lost due to reverse installation of the bypass valve part does not exist. The bypass valve component is provided with the pressure gauge connector part, the bypass valve component has a bypass function and a cut-off function, a channel between the pressure gauge connector part and the main valve component can be cut off, and the safety problem when the pressure gauge is connected is solved.

Description

Technical Field

[0001] This application relates to the field of valve technology for refrigeration systems, and particularly to a valve device. Background Technology

[0002] In some typical refrigeration systems, ball valves are used as the switching element, and a check valve is configured to connect them in parallel via welded joints and connecting pipes. When the ball valve is open, the check valve is closed, and refrigerant flows from the inlet to the outlet of the ball valve. When the ball valve is closed, the refrigerant trapped in the pipeline experiences a significant pressure increase as the ambient temperature rises, causing the check valve to automatically switch to the open state. After the check valve opens, the pressure is released to the outlet of the ball valve. With this pressure-relieving structure, the check valve is easily installed backwards; if installed backwards, the pressure-relieving function is lost, posing a potential hazard to the refrigeration system. Summary of the Invention

[0003] The purpose of this application is to solve the problems existing in the above-mentioned background art. In order to achieve this purpose, this application provides a valve device, including a main valve component, a bypass valve component and a connecting pipe;

[0004] The main valve component includes a main valve body and a main valve core. The main valve body has a valve cavity, and the main valve core is located in the valve cavity. The main valve body is provided with an inlet flow channel and an outlet flow channel.

[0005] The bypass valve component includes a bypass valve body and a bypass valve core located within the bypass valve body. The bypass valve body has an A interface portion, a B interface portion, and a flow channel portion. The inner cavity of the flow channel portion connects the inner cavity of the A interface portion and the inner cavity of the B interface portion. The A interface portion is connected to the inlet flow channel portion. One end of the connecting pipe is connected to the B interface portion, and the other end of the connecting pipe is connected to the outlet flow channel portion. The valve device includes a pressure relief channel, which includes the inner cavity of the flow channel portion and the inner cavity of the connecting pipe.

[0006] The pressure relief channel is provided with a first valve port. When the pressure difference between the medium in the inlet channel and the outlet channel reaches a preset value, the bypass valve core can leave the first valve port, allowing the inlet channel to be connected to the outlet channel through the pressure relief channel. When the pressure difference is less than the preset value, the bypass valve core is at least partially located at the A interface, and the bypass valve core can abut against the first valve port, thus blocking the pressure relief channel.

[0007] The valve device provided in this application allows the first valve port of the bypass valve component to open and release pressure when the pressure difference between the medium inlet and outlet flow channels of the main valve component reaches a preset value. Since the bypass valve component and the main valve component are integrated, there is no problem of the bypass valve component being installed backwards, which would cause the pressure release function to be lost. Attached Figure Description

[0008] Figure 1 This is a perspective view of the first embodiment of the valve device provided in this application. Figure 1 The central main valve core is located within the main valve body, so it is indicated by a dashed line;

[0009] Figure 2 for Figure 1 The valve assembly shown is a cross-sectional view with the first valve port closed.

[0010] Figure 3 for Figure 1 The valve device shown is a cross-sectional view of the valve assembly with the first valve port open.

[0011] Figure 4 for Figure 1 A cross-sectional view of the bypass valve component of the valve assembly shown;

[0012] Figure 5 A cross-sectional view of the valve device according to the second embodiment provided in this application with the first valve port in the open state;

[0013] Figure 6 A perspective view of the third embodiment of the valve device provided in this application;

[0014] Figure 7 for Figure 6 The valve assembly shown is a cross-sectional view of the valve assembly in the closed state of the first valve port.

[0015] The annotations in the attached figures are explained as follows:

[0016] 1-Main valve assembly, 11-Main valve body, 111-Inlet flow channel, 112-Outlet flow channel, 113-First hole, 114-Second hole, 115-First groove, 116-Second groove, 12-Main valve core, 13-Main valve stem, 14-Inlet pipe, 15-Outlet pipe;

[0017] 2-Bypass valve component, 21-Bypass valve body, 211-Flow channel section, 211a-Main flow channel section, 211b-First connecting flow channel section, 211c-Second connecting flow channel section, 211d-Third connecting flow channel section, 212-A interface section, 213-B interface section, 214 Pressure gauge interface section, 215-C interface section, 216-Limiting step section, 22-Bypass valve core, 23-Stop component, 24-Seal component, 25-Sealing gland, 26-First cover, 27-Second cover, 28-Elastic component, 29-Locking component;

[0018] M - First valve port, N - Second valve port;

[0019] 3. Connecting tubes. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the specific embodiments in the accompanying drawings.

[0021] First, let me introduce the core idea of ​​this application.

[0022] A core idea of ​​this application is to integrate a main valve component 1 and a bypass valve component 2 into a single valve device to solve the problem of loss of pressure relief function caused by the bypass valve component being installed backwards.

[0023] Another core idea of ​​this application is to enable the bypass valve component 2 to have a shut-off function, thereby cutting off the passage between the pressure gauge interface 214 of the main valve component 1 and the bypass valve component 2, in order to solve the safety problem when connecting the pressure gauge.

[0024] The following detailed description is provided in conjunction with the illustrated embodiments.

[0025] Please refer to Figures 1-4 .

[0026] like Figure 1 As shown, the valve assembly includes a main valve component 1, a bypass valve component 2, and a connecting pipe 3. The main valve component 1 includes a main valve body 11 and a main valve core 12. The main valve body 11 has a valve cavity, and the main valve core 12 is located within the valve cavity of the main valve body 11. In the illustrated embodiment, the main valve component 1 also includes a main valve stem 13. One end of the main valve stem 13 is connected to the main valve core 12, and the other end of the main valve stem 13 serves as the main valve operating end, used to connect to the operating component. In use, rotating the operating component drives the main valve core 12 to rotate, thereby opening and closing the main valve component 1. In this embodiment, the bypass valve component 2 and the main valve operating end are located on different sides of the circumferential space of the main valve body 11 to allow for greater space to operate the main valve operating end. In this embodiment, the main valve component 1 is a ball valve component.

[0027] like Figure 2As shown, the main valve body 11 is provided with an inlet flow channel 111 and an outlet flow channel 112. In this embodiment, the inlet flow channel 111 and the outlet flow channel 112 are located on opposite sides of the main valve core 12, and the side wall of the inlet flow channel 111 and the side wall of the outlet flow channel 112 form an angle of approximately 180°. The angle between the side wall of the inlet flow channel 111 and the side wall of the outlet flow channel 112 can be flexibly designed according to actual needs, for example, it can also be 90°, 120°, etc. In this embodiment, a first hole 113 is provided on the side wall of the inlet channel 111, and a second hole 114 is provided on the side wall of the outlet channel 112. The first hole 113 and the second hole 114 are respectively located on the same side of the inlet channel 111 and the outlet channel 112. In other embodiments, the first hole 113 and the second hole 114 may also be located on different sides of the inlet channel 111 and the outlet channel 112. In this embodiment, the end of the inlet channel 111 away from the main valve core 12 is connected to an inlet pipe 14, and the end of the outlet channel 112 away from the main valve core 12 is connected to an outlet pipe 15.

[0028] like Figure 1 , Figure 4 As shown, the bypass valve component 2 includes a bypass valve body 21 and a bypass valve core 22 located within the bypass valve body 21. The bypass valve body 21 is provided with an A interface portion 212, a B interface portion 213, and a flow channel portion 211. The inner cavity of the A interface portion 212 communicates with the inner cavity of the B interface portion 213 through the inner cavity of the flow channel portion 211. In this embodiment, the flow channel 211 includes at least a main flow channel 211a and a first connecting flow channel 211b. An A interface 212 is located at one end of the main flow channel 211a, and a B interface 213 is located on one side of the main flow channel 211a. The first connecting flow channel 211b is disposed on the side wall of the main flow channel 211a. The inner cavity of the first connecting flow channel 211b can connect the inner cavity of the main flow channel 211a and the inner cavity of the B interface 213, so that the inner cavity of the A interface 212 can connect with the inner cavity of the main flow channel 211a, the inner cavity of the first connecting flow channel 211b, and the inner cavity of the B interface 213.

[0029] like Figure 2As shown, interface A 212 is connected to one side of inlet channel 111, one end of connecting pipe 3 is connected to interface B 213, and the other end of connecting pipe 3 is connected to one side of outlet channel 112. The valve device includes a pressure relief channel, which includes at least the inner cavity of channel 211 and the inner cavity of connecting pipe 3. In this embodiment, the pressure relief channel also includes the inner cavity of the first hole 113 and the inner cavity of the second hole 114. In this embodiment, the inner cavity of channel 211 includes the inner cavity of main channel 211a and the inner cavity of the first connecting channel 211b. In this embodiment, the side wall of inlet channel 111 is provided with a first groove 115, the outer peripheral wall of interface A 212 is provided with external threads, the inner peripheral wall of the first groove 115 is provided with internal threads, and interface A 212 is screwed to the first groove 115. One end of connecting pipe 3 is inserted into interface B 213 and welded to the side wall of interface B 213. The side wall of the outflow channel section 112 is provided with a second groove section 116. The other end of the connecting pipe 3 is inserted into the second groove section 116 and welded to the side wall of the second groove section 116. In actual implementation, the connection method between the A interface section 212 and the inflow channel section 111, the connection method between the connecting pipe 3 and the B interface section 213, and the connection method between the connecting pipe 3 and the outflow channel section 112 can be flexibly selected according to actual needs, and are not limited to screwing or welding.

[0030] like Figure 2 or Figure 3 As shown, a first valve port M is provided on the pressure relief channel. In this embodiment, the first valve port M is formed at the end of the first hole 113 away from the inlet flow channel 111. The bypass valve core 22 is at least partially located within the main flow channel 211a, and the first valve port M is opened and closed by moving within the main flow channel 211a. A limiting step 216 is provided on the side wall of the main flow channel 211a to limit the movement limit of the bypass valve core 22 in the direction of opening the first valve port M. The bypass valve core 22 returns to the position of closing the first valve port M by its own gravity. To ensure that the bypass valve core 22 can return to the position of closing the first valve port M by its own gravity, the valve device needs to be arranged with the bypass valve core 22 on top and the first valve port M on the bottom during use.

[0031] like Figure 3 As shown, when the pressure difference between the medium in the inlet flow channel 111 and the outlet flow channel 112 reaches a preset value, the bypass valve core 22 moves away from the first valve port M, opening the first valve port M. At this time, the inlet flow channel 111 is connected to the outlet flow channel 112 through the pressure relief channel, releasing pressure in the direction of the arrow shown in the figure. Figure 2 As shown, when the pressure difference is less than the preset value, the bypass valve core 22 returns to the position where it abuts against the first valve port M by its own gravity, so that the first valve port M is closed, and the pressure relief channel is blocked.

[0032] The following example, using a refrigeration system, illustrates the working process of the valve device described above:

[0033] When the main valve component 1 is open, the refrigerant flows from the inlet flow channel 111 through the inner cavity of the main valve core 12 to the outlet flow channel 112. Due to the bypassing action of the bypass valve component 2, the refrigerant cannot flow from the outlet flow channel 112 through the connecting pipe 3 and the bypass valve component 2 to the inlet flow channel 111.

[0034] When the main valve component 1 is closed, the evaporation of the refrigerant in the system causes the medium pressure in the inlet flow channel 111 to be greater than the medium pressure in the outlet flow channel 112. When the pressure difference between the medium in the inlet flow channel 111 and the outlet flow channel 112 becomes large enough, the pressure difference force acting on the bypass valve core 22 overcomes the gravity of the bypass valve core 22 and pushes the bypass valve core 22 upward, thereby opening the first valve port M. After the first valve port M is opened, the inlet flow channel 111 is depressurized to the outlet flow channel 112 through the pressure relief channel. When the gravity of the bypass valve core 22 is greater than the pressure difference force acting on the bypass valve core 22, the bypass valve core 22 returns to its downward position, thereby being able to abut against the first valve port M to close the first valve port M.

[0035] As can be seen from the above description, when the valve device is depressurized, the pressure is first depressurized from the inlet flow channel 111 of the main valve component 1 to the bypass valve component 2, and then from the bypass valve component 2 to the outlet flow channel 112 of the main valve component 1 through the connecting pipe 3, without passing through the main valve core 12. Moreover, the bypass valve component 2 and the main valve component 1 are integrated into one unit, so there is no problem of the bypass valve component 2 being installed backwards, which would cause the pressure relief function to be lost. There is also no need to weld a large number of joints and pipes to achieve the connection between the bypass valve component 2 and the main valve component 1. Therefore, the cost is low, the number of welding points is small, and the risk of leakage is small.

[0036] Furthermore, such as Figure 3 As shown, the bypass valve body 21 may also be provided with a pressure gauge interface portion 214 and a second valve port portion N. In this embodiment, the pressure gauge interface portion 214 is located on one side of the main flow channel portion 211a. The end of the pressure gauge interface portion 214 away from the main flow channel portion 211a is covered by a first cover 26. The second valve port portion N is formed in the main flow channel portion 211a, and the second valve port portion N is located between the end of the main flow channel portion 211a away from the A interface portion 212 and the end closer to the A interface portion 212. More precisely, the second valve port portion N is further away from the A interface portion 212 relative to the limiting step portion 216.

[0037] Furthermore, the bypass valve includes a shut-off element 23 for opening and closing the second valve port N. When the second valve port N is open, the pressure gauge interface 214 is connected to at least one of the inlet flow channel 111 and the outlet flow channel 112. When the second valve port N is closed, the pressure gauge interface 214 is not connected to either the inlet flow channel 111 or the outlet flow channel 112.

[0038] During maintenance, remove the first cover 26 and connect the pressure gauge to the pressure gauge interface 214. Before removing the first cover 26, close the second valve port N. After the second valve port N is closed, the pressure gauge interface 214 is not connected to the inlet flow channel 111 or the outlet flow channel 112, thus preventing the problem of instantaneous high pressure rushing out of the pressure gauge interface 214 and causing danger after the first cover 26 is removed. After connecting the pressure gauge, open the second valve port N and the pressure gauge will measure the pressure.

[0039] like Figure 4 As shown, in this embodiment, the stop member 23 is at least partially located within the main channel portion 211a, and the opening and closing of the second valve port portion N is achieved by moving within the main channel portion 211a. The end of the stop member 23 near the second valve port portion N has a sealing surface for sealing the second valve port portion N. The end of the stop member 23 away from the second valve port portion N serves as a bypass valve operating end, used to connect to the operating component. The stop member 23 is threadedly connected to the side wall of the main channel portion 211a, and the stop member 23 is moved within the main channel portion 211a by turning the operating component. A sealing member 24 is provided between the stop member 23 and the side wall of the main channel portion 211a. The sealing member 24 is positioned between the sealing cap 25 and the stepped surface of the side wall of the main channel portion 211a. The sealing cap 25 is threadedly connected to the side wall of the main channel portion 211a. A second cover 27 covers the end of the main channel portion 211a away from the A interface portion 212.

[0040] like Figure 4 As shown, in this embodiment, the flow channel 211 further includes a second connecting flow channel 211c. The second connecting flow channel 211c is disposed on the side wall of the main flow channel 211a. The inner cavity of the second connecting flow channel 211c connects the inner cavity of the main flow channel 211a and the inner cavity of the B interface 213. The second connecting flow channel 211c is located on the side of the first connecting flow channel 211b near the second valve port N. When the second valve port N is open, the inner cavity of the pressure gauge interface 214 is connected to the inner cavity of the outflow flow channel 112 through the inner cavity of the main flow channel 211a, the inner cavity of the second connecting flow channel 211c, the inner cavity of the connecting pipe 3, and the inner cavity of the second hole 114.

[0041] Please refer to Figure 5 .

[0042] In this embodiment, the bypass valve component 2 includes an elastic element 28. The elastic element 28 is located on the side of the bypass valve core 22 away from the first valve port M. One end of the elastic element 28 away from the bypass valve core 22 abuts against the limiting step portion 216, and the other end abuts against the bypass valve core 22. The bypass valve core 22 returns to the closed position from the position where the first valve port M is open by the elastic force of the elastic element 28. With this design, the valve device can be arranged in any orientation during use, instead of having to be arranged with the bypass valve core 22 above and the first valve port M below.

[0043] Please refer to Figures 6-7 .

[0044] In this embodiment, the flow channel 211 includes a main flow channel 211a, a third connecting flow channel 211d, and a C interface 215. The A interface 212 is located at one end of the main flow channel 211a, and the B interface 213 and the C interface 215 are located on one side of the main flow channel 211a. The inner cavity of the B interface 213 is connected to the inner cavity of the C interface 215. The third connecting flow channel 211d is disposed on the side wall of the main flow channel 211a. The inner cavity of the third connecting flow channel 211d is connected to the inner cavity of the main flow channel 211a and the inner cavity of the C interface 215, so that the inner cavity of the inlet flow channel 111 is connected to the inner cavity of the outlet flow channel 112 through the inner cavity of the first hole 113, the inner cavity of the main flow channel 211a, the inner cavity of the third connecting flow channel 211d, the inner cavity of the connecting pipe 3, and the inner cavity of the second hole 114.

[0045] In this embodiment, the first valve port M is formed at one end of the third connecting flow channel 211d near the C interface 215, and the bypass valve core 22 is at least partially located in the C interface 215. The first valve port M is opened and closed by moving within the C interface 215.

[0046] In this embodiment, the bypass valve core 22 is provided with an elastic element 28 on the side away from the first valve port M, and a locking element 29 is connected to the end of the C interface away from the first valve port M. The elastic element 28 is limited between the locking element 29 and the bypass valve core 22.

[0047] In this embodiment, the sidewall of the C interface portion 215 and the sidewall of the main channel portion 211a form an angle α, where α is less than 90°, resulting in a "Y"-shaped arrangement between the main channel portion 211a and the C interface portion 215. In other embodiments, α can also be equal to 90 degrees, resulting in a "T"-shaped arrangement between the main channel portion and the C interface portion 215.

[0048] In this embodiment, when the second valve port N is open, the inner cavity of the pressure gauge interface 214 is connected to the inner cavity of the main flow channel 211a and the inner cavity of the first hole 113 through the inner cavity of the main flow channel 211a and the inner cavity of the inlet flow channel 111.

[0049] In this embodiment, the connecting pipe 3 is a right-angled brass forging. One end of it is welded to the B interface 213, and the other end is welded to the second groove 116 of the main valve body 11. After welding, the pressure resistance of the connecting pipe 3 can be improved, making the valve device suitable for CO2 refrigeration systems.

[0050] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A valve device, characterized in that, It includes a main valve assembly (1), a bypass valve assembly (2), and a connecting pipe (3); The main valve component (1) includes a main valve body (11) and a main valve core (12). The main valve body (11) has a valve cavity, and the main valve core (12) is located in the valve cavity. The main valve body (11) is provided with an inlet flow channel (111) and an outlet flow channel (112). The bypass valve component (2) includes a bypass valve body (21) and a bypass valve core (22). The bypass valve body (21) is provided with an A interface (212), a B interface (213) and a flow channel (211). The inner cavity of the flow channel (211) is connected to the inner cavity of the A interface (212) and the inner cavity of the B interface (213). The A interface (212) is connected to the inlet flow channel (111). One end of the connecting pipe (3) is connected to the B interface (213), and the other end of the connecting pipe (3) is connected to the outlet flow channel (112). The valve device includes a pressure relief channel, which includes the inner cavity of the flow channel (211) and the inner cavity of the connecting pipe (3). The pressure relief channel is provided with a first valve port (M). When the pressure difference between the medium in the inlet flow channel (111) and the outlet flow channel (112) reaches a preset value, the bypass valve core (22) can leave the first valve port (M), so that the inlet flow channel (111) is connected to the outlet flow channel (112) through the pressure relief channel. When the pressure difference is less than the preset value, the bypass valve core (22) is at least partially located in the A interface (212), and the bypass valve core (22) can abut against the first valve port (M), so that the pressure relief channel is blocked.

2. The valve device according to claim 1, characterized in that, The bypass valve component (2) includes a shut-off member (23). The bypass valve body (21) is provided with a pressure gauge interface (214) and a second valve port (N). The shut-off member (23) is used to open and close the second valve port (N). When the second valve port (N) is open, the inner cavity of the pressure gauge interface (214) is connected to at least one of the inner cavity of the inlet flow channel (111) and the inner cavity of the outlet flow channel (112). When the second valve port (N) is closed, the inner cavity of the pressure gauge interface (214) is not connected to the inner cavity of the inlet flow channel (111) and the inner cavity of the outlet flow channel (112).

3. The valve device according to claim 2, characterized in that, The flow channel (211) includes a main flow channel (211a) and a first connecting flow channel (211b). The A interface (212) is located at one end of the main flow channel (211a), and the B interface (213) is located on one side of the main flow channel (211a). The first connecting flow channel (211b) is disposed on the side wall of the main flow channel (211a), and the inner cavity of the first connecting flow channel (211b) can connect the inner cavity of the main flow channel (211a) with the inner cavity of the B interface (213).

4. The valve device according to claim 3, characterized in that, The inlet flow channel (111) has a first hole (113) on its side wall. The first valve port (M) is formed at one end of the first hole (113) away from the inner cavity of the inlet flow channel (111). The bypass valve core (22) is at least partially located in the inner cavity of the main flow channel (211a). The first valve port (M) is opened and closed by moving within the inner cavity of the main flow channel (211a).

5. The valve device according to claim 4, characterized in that, The side wall of the main flow channel (211a) is provided with a limiting step (216). The limiting step (216) is located on the side of the bypass valve core (22) away from the first valve port (M). It is used to limit the movement limit of the bypass valve core (22) in the direction of opening the first valve port (M). When the bypass valve core (22) abuts against the limiting step (216), the inner cavity of the first connecting flow channel (211b) connects the inner cavity of the main flow channel (211a) and the inner cavity of the B interface (213).

6. The valve device according to claim 4, characterized in that, The flow channel section (211) includes a second connecting flow channel section (211c), which is located on the side wall of the main flow channel section (211a). The inner cavity of the second connecting flow channel section (211c) connects the inner cavity of the main flow channel section (211a) with the inner cavity of the B interface section (213). The second connecting flow channel section (211c) is located on the side of the first connecting flow channel section (211b) near the second valve port section (N). When the second valve port section (N) is open, the inner cavity of the pressure gauge interface section (214) is connected to the inner cavity of the outflow flow channel section (112) through the inner cavity of the main flow channel section (211a), the inner cavity of the second connecting flow channel section (211c), the inner cavity of the connecting pipe (3), and the inner cavity of the second hole section (114).

7. The valve device according to claim 4, characterized in that, The outflow channel (112) has a second hole (114) on its side wall. The channel (211) includes a main channel (211a), a third connecting channel (211d), and a C interface (215). The A interface (212) is located at one end of the main channel (211a), and the B interface (213) and the C interface (215) are located on one side of the main channel (211a). The inner cavity of the B interface (213) can communicate with the inner cavity of the C interface (215). The third connecting channel (211d) is located in the main channel (211a). The inner cavity of the third connecting channel (211d) is connected to the inner cavity of the main channel (211a) on the side wall. The inner cavity of the third connecting channel (211d) can be connected to the inner cavity of the C interface (215). The inner cavity of the inlet channel (111) can be connected to the inner cavity of the outlet channel (112) through the inner cavity of the first hole (113), the inner cavity of the main channel (211a), the inner cavity of the third connecting channel (211d), the inner cavity of the C interface (215), the inner cavity of the connecting pipe (3), and the inner cavity of the second hole (114).

8. The valve device according to claim 7, characterized in that, The angle between the sidewall of the C interface (215) and the sidewall of the main channel (211a) is α, where α is less than 90° or equal to 90°.

9. The valve device according to claim 7, characterized in that, The first valve port (M) is formed at one end of the third connecting flow channel (211d) near the C interface (215), and the bypass valve core (22) is at least partially located in the C interface (215), and the first valve port (M) is opened and closed by moving in the C interface (215).

10. The valve device according to claim 9, characterized in that, When the second valve port (N) is open, the inner cavity of the pressure gauge interface (214) is connected to the inner cavity of the main flow channel (211a) and the inner cavity of the first hole (113) through the inner cavity of the main flow channel (211a) and the inner cavity of the inlet flow channel (111).

11. The valve device according to any one of claims 3-10, characterized in that, The second valve port (N) is formed in the main channel (211a) and located between the end of the main channel (211a) near the A interface (212) and the end away from the A interface (212). The stop member (23) is at least partially located in the main channel (211a), and the opening and closing of the second valve port (N) is achieved by moving within the main channel (211a).

12. The valve device according to any one of claims 1-10, characterized in that, The bypass valve includes an elastic element (28) located on the side of the bypass valve core (22) away from the first valve port (M). The bypass valve core (22) returns from the position of opening the first valve port (M) to the position of closing the first valve port (M) by the elastic force of the elastic element (28).

13. The valve device according to any one of claims 1-10, characterized in that, The main valve component (1) includes a main valve stem (13), one end of which is connected to the main valve core (12), and the other end of which is the main valve operating end. The main valve operating end and the bypass valve component (2) are located on different sides of the circumferential space of the main valve body (11).

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