Integrated water valve for vehicle

Abstract

The utility model relates to the technical field of vehicle water valve manufacturing, in particular to a vehicle integrated water valve. Comprising a shell, a first valve cavity and a second valve cavity which are isolated from each other are formed in the shell, a connecting end is arranged on one side of the shell, a plurality of flow channel openings are formed in the connecting end, and the flow channel openings comprise a plurality of first flow channel openings and a plurality of second flow channel openings which are communicated with the first valve cavity and the second valve cavity respectively; the first valve element is rotationally arranged in the first valve cavity, a driving connection structure is arranged on the first valve element, and a first valve element flow channel is formed in the first valve element; the second valve element is rotationally arranged in the second valve cavity, and a second valve element flow channel is formed in the second valve element; in the rotating process of the first valve element, the transmission step abuts against the driving step to drive the second valve element to rotate, and a rotating neutral position is arranged between the driving step and the transmission step in the circumferential direction. The device has the advantage of high integration, can save installation space, and is convenient for pipeline connection.

Description

Technical Field

[0001] The utility model relates to the technical field of combined water valve manufacturing, in particular to an integrated water valve for a vehicle. Background Art

[0002] With the gradual implementation of the national new energy strategy, the market penetration of new energy vehicles has been increasing by double digits annually. Traditional vehicles primarily draw their energy from residual heat after engine combustion, which is fully sufficient to meet the needs of passengers in the cockpit. However, new energy vehicles primarily draw their energy from batteries. Optimizing this energy while addressing issues such as cabin comfort and reduced range caused by battery depletion presents a major challenge in the design of thermal management systems for new energy vehicles. Currently, new energy vehicles generally have low energy utilization rates, with some energy being directly emitted into the atmosphere without being fully utilized.

[0003] Water valves are key components in the thermal management system of new energy vehicles, controlling the flow of heat energy in the coolant. Currently, to accommodate multiple flow path switching, two sets of water valves are often required within the thermal management system. This results in a highly complex piping system and does not meet the integration requirements of lightweight and compact control components in new energy vehicles. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides an integrated water valve for a vehicle, which has the advantages of high integration, can save installation space, and facilitates pipeline connection.

[0005] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0006] An integrated water valve for a vehicle, comprising:

[0007] A housing, wherein a first valve cavity and a second valve cavity isolated from each other are provided in the housing, a connecting end portion is provided on one side of the housing, and a plurality of flow passages are provided on the connecting end portion, wherein the flow passages include a plurality of first flow passages and second flow passages respectively communicating with the first valve cavity and the second valve cavity;

[0008] a first valve core, the first valve core being rotatably disposed in the first valve cavity, the first valve core being provided with a drive connection structure, the drive connection structure being disposed outside the first valve cavity, a first valve core flow channel being provided in the first valve core, and the first valve core being rotated to switch a communication state between the first valve core flow channel and each first flow channel opening;

[0009] A second valve core is rotatably disposed in the second valve cavity, a second valve core flow channel is provided in the second valve core, and the second valve core is rotated to switch the communication state between the second valve core flow channel and each second flow channel opening;

[0010] A driving step is provided on the side of the first valve core near the second valve core, and a transmission step corresponding to the driving step is provided on the second valve core. During the rotation of the first valve core, the transmission step conflicts with the driving step to drive the second valve core to rotate, and a rotation gap is provided between the driving step and the transmission step in the circumferential direction.

[0011] Furthermore, the present application discloses an integrated vehicle water valve, wherein the housing includes a valve cover, a first valve housing, and a second valve housing, which are axially connected in sequence. The first valve cavity is disposed between the valve cover and the first valve housing, the second valve cavity is disposed between the first valve housing and the second valve housing, the connecting end is disposed at an end of the second valve housing away from the first valve housing, the first valve housing is provided with an opening for passing through the transmission step and / or the drive step, and a first sealing ring is disposed between the opening and the second valve core. As a preferred embodiment of the present application, in this embodiment, the transmission step passes through the opening, a connecting post is disposed between the second valve core and the transmission step, and the connecting post is rotatably disposed within the opening.

[0012] Furthermore, in the present application, an integrated water valve for a vehicle is provided with a first pipe cavity on the second valve housing corresponding one-to-one to the first flow channel opening, and a second pipe cavity is provided on the first valve housing corresponding one-to-one to the first pipe cavity, the two ends of the second pipe cavity are respectively connected to the first pipe cavity and the first valve cavity, and a third sealing ring is provided between the second pipe cavity and the first valve core.

[0013] Furthermore, in an integrated vehicle water valve in the present application, the second pipe cavity is circumferentially arrayed on the outside of the first valve cavity, the second pipe cavity includes a longitudinal flow channel connected to the first pipe cavity and a transverse flow channel connected to the first valve cavity, and the opening of the first valve core flow channel on the first valve core corresponds to the transverse flow channel.

[0014] Furthermore, in the present application, an integrated water valve for a vehicle has a transverse flow channel open at one end near the valve cover, the valve cover includes a flow channel cover and a valve cavity cover, the flow channel cover is arranged on the first valve housing, the flow channel cover includes a cover body adapted to the open end of the transverse flow channel, the flow channel cover also includes a valve cavity wall that is circumferentially closed and axially open at both ends, the cover body is connected to the outside of the valve cavity wall, the first valve core is arranged on the inside of the valve cavity wall, the valve cavity cover is arranged on the end of the valve cavity wall away from the first valve housing, the valve cavity cover is provided with a through hole corresponding to the drive connection structure, and a second sealing ring is provided between the valve cavity cover and the drive connection structure. As a preferred embodiment of the present application, based on the above structure, the housing adopts a split part, which is easy to process and helps to reduce manufacturing costs.

[0015] Furthermore, in the present application, an integrated water valve for a vehicle has four second pipe cavities, which are evenly arrayed in the circumferential direction, two first valve core flow channels, and four ports corresponding to a pair of first valve core flow channels are evenly arranged circumferentially on the side of the first valve core.

[0016] Furthermore, in the integrated vehicle water valve of the present application, a second valve core flow channel is provided on the side of the second valve core near the connection end, with the opening of the second valve core flow channel facing the second flow channel opening; a spring is provided on the side of the second valve core away from the connection end, the spring abutting between the second valve core and the first valve housing; and a sealing gasket is provided on the side of the second valve cavity near the connection end. As a preferred embodiment of the present application, the spring is provided to ensure that the second valve core is tightly fitted to the inner wall of the second valve cavity near the connection end.

[0017] Furthermore, in the present application, an integrated vehicle water valve is provided with a calibration step on the side of the first valve housing near the second valve core, a limit step is provided on the second valve core corresponding to the calibration step, and a rotation gap is provided between the limit step and the calibration step in the circumferential direction; a circumferential positioning structure is provided on the drive connection structure, and the circumferential positioning structure is used to cooperate with the driver input shaft to determine the circumferential posture of the first valve core relative to the driver input shaft. As a preferred embodiment of the present application, when used for the first time, the second valve core is driven to rotate until the limit step conflicts with the calibration step, thereby determining the circumferential position of the second valve core. The provision of the circumferential positioning structure can determine the relative position of the drive connection structure and the driver input shaft, so there is no need to calibrate the posture of the first valve core, which has the advantage of simple control.

[0018] Furthermore, in the integrated vehicle water valve of the present application, a pressure-balancing chamber is provided between the second valve core and the first valve housing, and a through-hole is provided in a flow channel of the second valve core that communicates with the pressure-balancing chamber. As a preferred embodiment of the present application, the pressure-balancing chamber is provided to balance the longitudinal water pressure received by the second valve core.

[0019] Furthermore, in the present application, an integrated vehicle water valve has five second flow openings, including a central flow opening and four outer flow openings arranged circumferentially around the central flow opening. The second valve core has two flow channels, including channel A connecting the central flow opening and one outer flow opening, and channel B connecting a pair of outer flow openings. As a preferred embodiment of the present application, the second valve core thus achieves a five-way switching function.

[0020] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0021] The utility model provides an integrated water valve for a vehicle, and the method of use is as follows: during installation, the external pipeline can be integrated and connected to one side of the connection end, and connected to each flow channel one by one, so as to save installation space and have the advantage of convenient connection of pipelines. During operation, the driver is connected to the drive connection structure, and the first valve core is driven to rotate by the input torque. When switching the flow channel, the first valve core is first rotated in one direction to drive the second valve core to a preset position to complete the flow channel switching of the second flow channel and the second valve core flow channel, and then the first valve core is rotated in the opposite direction to the preset position to complete the flow channel switching of the first flow channel and the first valve core flow channel. During this process, the driving step rotates in the rotation neutral position without affecting the position of the second valve core. It can realize that one driver controls the rotation of two valve cores, which can further save space and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic plan view of the connection end side of an integrated water valve for a vehicle in an embodiment of the present application;

[0023] Figure 2 for Figure 1 Cross-sectional view in the AA direction;

[0024] Figure 3 This is an exploded view of components of an integrated water valve for a vehicle according to an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the connection between the first valve core and the second valve core in the embodiment of the present application;

[0026] Figure 5 Schematic diagram of the connection between the driving step and the transmission step in the embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of the connection between the second valve core and the second valve housing in an embodiment of the present application;

[0028] Figure 7 This is a schematic diagram of a first valve housing in an embodiment of the present application;

[0029] Figure 8 This is a schematic plan view of the flow channel side of the second valve core in the embodiment of the present application;

[0030] Figure 9 Schematic diagram of the flow channel connection corresponding to the first valve core flow channel of a vehicle integrated water valve in an embodiment of the present application;

[0031] Figure 10 This is a schematic diagram of the flow channel connection corresponding to the second valve core flow channel of a vehicle integrated water valve in an embodiment of the present application.

[0032] In the figure: 1-housing; 101-first valve chamber; 102-second valve chamber; 11-connecting end; 111-first flow channel opening; 112-second flow channel opening; 1121-central flow channel opening; 1122-outer flow channel opening; 12-first valve housing; 120-opening; 121-second conduit chamber; 1211-longitudinal flow channel; 1212-transverse flow channel; 122-calibration step; 123-pressure balance chamber; 13-second valve housing; 131-first conduit chamber; 14-valve cover; 141-flow channel cover; 1411-cover body; 1412-valve chamber wall; 142-valve chamber cover;

[0033] 2-first valve core; 20-first valve core flow channel; 21-driving step; 22-driving connection structure; 221-circumferential positioning structure;

[0034] 3-second valve core; 30-second valve core flow channel; 301-flow channel A; 302-flow channel B; 303-perforation; 31-transmission step; 32-limiting step;

[0035] 4-spring;

[0036] 61 - first sealing ring; 62 - second sealing ring; 63 - third sealing ring; 64 - sealing gasket. DETAILED DESCRIPTION

[0037] Combine Figures 1 to 5 The vehicle integrated water valve shown includes:

[0038] A housing 1 is provided with a first valve cavity 101 and a second valve cavity 102 isolated from each other. A connecting end 11 is provided on one side of the housing 1. The connecting end 11 is provided with a plurality of flow openings, including a plurality of first flow openings 111 and a second flow opening 112 respectively communicating with the first valve cavity 101 and the second valve cavity 102.

[0039] The first valve core 2 is rotatably disposed in the first valve cavity 101. The first valve core 2 is provided with a drive connection structure 22, which is located outside the first valve cavity 101. The first valve core 2 is provided with a first valve core flow channel 20. The first valve core 2 is rotated to switch the communication state between the first valve core flow channel 20 and each first flow channel opening 111;

[0040] The second valve core 3 is rotatably disposed in the second valve cavity 102 , and a second valve core flow channel 30 is provided in the second valve core 3 . The second valve core 3 is rotated to switch the communication state between the second valve core flow channel 30 and each second flow channel opening 112 ;

[0041] A driving step 21 is provided on the side of the first valve core 2 near the second valve core 3, and a transmission step 31 corresponding to the driving step 21 is provided on the second valve core 3. During the rotation of the first valve core 2, the transmission step 31 conflicts with the driving step 21 to drive the second valve core 3 to rotate, and a rotation gap is provided between the driving step 21 and the transmission step 31 in the circumferential direction.

[0042] Based on the above structure, a method of using a vehicle integrated water valve is as follows: during installation, the external pipeline can be integrated and connected to one side of the connection end 11, and connected to each flow channel one by one, so as to save installation space and have the advantage of convenient connection of pipelines. During operation, the driver is connected to the drive connection structure 22, and the first valve core 2 is driven to rotate by the input torque. When switching the flow channel, the first valve core 2 is first rotated in one direction to drive the second valve core 3 to a preset position to complete the flow channel switching of the second flow channel 112 and the second valve core flow channel 30, and then the first valve core 2 is rotated in the opposite direction to the preset position to complete the flow channel switching of the first flow channel 111 and the first valve core flow channel 20. During this process, the driving step 21 rotates in the rotation neutral position without affecting the position of the second valve core 3.

[0043] Combine Figure 2 and Figure 3 In the embodiment shown, the housing 1 includes a valve cover 14, a first valve housing 12, and a second valve housing 13, which are axially connected in sequence. The first valve chamber 101 is provided between the valve cover 14 and the first valve housing 12, and the second valve chamber 102 is provided between the first valve housing 12 and the second valve housing 13. The connecting end 11 is provided at an end of the second valve housing 13 away from the first valve housing 12. The first valve housing 12 is provided with an opening 120, which is used to pass through the transmission step 31 and / or the drive step 21. A first sealing ring 61 is provided between the opening 120 and the second valve core 3. In this embodiment, the transmission step 31 passes through the opening 120, and a connecting post is provided between the second valve core 3 and the transmission step 31. The connecting post is rotatably disposed within the opening 120.

[0044] In this embodiment, the second valve housing 13 is provided with a first conduit cavity 131 corresponding one-to-one to the first flow channel opening 111, and the first valve housing 12 is provided with a second conduit cavity 121 corresponding one-to-one to the first conduit cavity 131. The two ends of the second conduit cavity 121 are respectively connected to the first conduit cavity 131 and the first valve cavity 101. A third sealing ring 63 is provided between the second conduit cavity 121 and the first valve core 2. In addition, the second conduit cavity 121 is circumferentially arrayed on the outside of the first valve cavity 101. The second conduit cavity 121 includes a longitudinal flow channel 1211 connecting to the first conduit cavity 131 and a transverse flow channel 1212 connecting to the first valve cavity 101. The opening of the first valve core flow channel 20 on the first valve core 2 corresponds to the transverse flow channel 1212. Figure 2 and Figure 3In the embodiment shown, the transverse flow channel 1212 is open near one end of the valve cover 14. The valve cover 14 includes a flow channel cover 141 and a valve cavity cover 142. The flow channel cover 141 is mounted on the first valve housing 12. The flow channel cover 141 includes a cover body 1411 adapted to the open end of the transverse flow channel 1212. The flow channel cover 141 also includes a valve cavity wall 1412 that is circumferentially closed and axially open at both ends. The cover body 1411 is connected to the outside of the valve cavity wall 1412. The first valve core 2 is disposed on the inside of the valve cavity wall 1412. The valve cavity cover 142 is mounted on the end of the valve cavity wall 1412 away from the first valve housing 12. The valve cavity cover 142 is provided with a through hole corresponding to the drive connection structure 22. A second sealing ring 62 is provided between the valve cavity cover 142 and the drive connection structure 22. Based on the above structure, the housing 1 is made of split parts, which is easy to process and helps reduce manufacturing costs.

[0045] Combine Figure 9 As shown, in this embodiment, the number of second pipe cavities 121 is 4, and they are evenly arrayed in the circumferential direction. The number of first valve core flow channels 20 is 2, and the 4 ports corresponding to a pair of first valve core flow channels 20 are evenly arranged circumferentially on the side of the first valve core 2.

[0046] Combine Figure 2 and Figure 3 In the illustrated embodiment, the second valve core flow channel 30 is disposed on the side of the second valve core 3 near the connection end 11, with the opening of the second valve core flow channel 30 facing the second flow channel opening 112. A spring 4 is disposed on the side of the second valve core 3 away from the connection end 11, interposed between the second valve core 3 and the first valve housing 12. A sealing gasket 64 is disposed on the side of the second valve cavity 102 near the connection end 11. The spring 4 ensures that the second valve core 3 is tightly attached to the inner wall of the second valve cavity 102 near the connection end 11. Specifically, the spring 4 is a wave spring.

[0047] Combine Figure 6 and 7 As shown, in this embodiment, a calibration step 122 is provided on the side of the first valve housing 12 near the second valve core 3, and a limiting step 32 is provided on the second valve core 3 corresponding to the calibration step 122, and a rotation gap is provided between the limiting step 32 and the calibration step 122. In addition, combined with Figure 4As shown, the drive connection structure 22 is provided with a circumferential positioning structure 221, which is used to cooperate with the driver input shaft to adjust the circumferential posture of the first valve core 2 relative to the driver input shaft. During initial use, the second valve core 3 is driven to rotate until the limit step 32 conflicts with the calibration step 122, thereby determining the circumferential position of the second valve core 3. The provision of the circumferential positioning structure 221 can determine the relative position of the drive connection structure 22 and the driver input shaft, so the posture of the first valve core 2 does not need to be calibrated, which has the advantage of simple control. In this embodiment, the drive connection structure 22 is a column that extends circumferentially out of the valve chamber cover 142, and the circumferential positioning structure 221 is a slot. In other embodiments, the circumferential positioning structure 221 can be a convex portion.

[0048] Combine Figure 2 and Figure 8 As shown, in this embodiment, a pressure balancing chamber 123 is provided between the second valve core 3 and the first valve housing 12, and a through hole 303 is provided on one of the second valve core flow channels 30, which is connected to the pressure balancing chamber 123. The pressure balancing chamber 123 is provided to balance the longitudinal water pressure received by the second valve core 3.

[0049] Combine Figure 1 、 Figure 8 and Figure 10 As shown, in this embodiment, the second flow channel openings 112 are five in number, including a central flow channel opening 1121 and four outer flow channel openings 1122 arranged circumferentially around the central flow channel opening 1121. The second valve core flow channels 30 are two in number, including flow channel A 301 connecting the central flow channel opening 1121 and one of the outer flow channels 1122, and flow channel B 302 connecting the pair of outer flow channels 1122. Thus, the second valve core 3 achieves a five-way switching function. In this embodiment, the through hole 303 is provided in flow channel A 301.

[0050] The above description of the technical principles of the present invention in conjunction with specific embodiments is intended solely to illustrate the principles of the present invention and is not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

[0051] Without departing from the concept of the present invention, several modifications and improvements may be made, such as combining different features in various embodiments, etc., which all fall within the scope of protection of the present invention.

Claims

1. An integrated water valve for a vehicle, characterized by: include: A housing (1), wherein a first valve cavity (101) and a second valve cavity (102) isolated from each other are provided in the housing (1), a connecting end portion (11) is provided on one side of the housing (1), and a plurality of flow passages are provided on the connecting end portion (11), wherein the flow passages include a plurality of first flow passages (111) and a plurality of second flow passages (112) respectively communicating with the first valve cavity (101) and the second valve cavity (102); a first valve core (2), the first valve core (2) being rotatably disposed in the first valve cavity (101), a driving connection structure (22) being provided on the first valve core (2), a first valve core flow channel (20) being provided in the first valve core (2), and the first valve core (2) being rotated to switch the communication state between the first valve core flow channel (20) and each first flow channel opening (111); A second valve core (3), the second valve core (3) being rotatably disposed in the second valve cavity (102), a second valve core flow channel (30) being provided in the second valve core (3), and the second valve core (3) being rotated to switch the communication state between the second valve core flow channel (30) and each second flow channel opening (112); A driving step (21) is provided on one side of the first valve core (2) near the second valve core (3), and a transmission step (31) corresponding to the driving step (21) is provided on the second valve core (3). During the rotation of the first valve core (2), the transmission step (31) conflicts with the driving step (21) to drive the second valve core (3) to rotate, and a rotation gap is provided between the driving step (21) and the transmission step (31) in the circumferential direction.

2. The vehicle integrated water valve according to claim 1, characterized in that: The housing (1) comprises a valve cover (14), a first valve housing (12) and a second valve housing (13) which are axially connected in sequence, the first valve chamber (101) being arranged between the valve cover (14) and the first valve housing (12), the second valve chamber (102) being arranged between the first valve housing (12) and the second valve housing (13), the connecting end portion (11) being arranged at an end of the second valve housing (13) away from the first valve housing (12), the first valve housing (12) being provided with an opening (120), the opening (120 being used to pass through a transmission step (31) and / or a drive step (21), and a first sealing ring (61) being provided between the opening (120) and the second valve core (3).

3. The vehicle integrated water valve according to claim 2, characterized in that: The second valve housing (13) is provided with a first pipeline cavity (131) corresponding one-to-one to the first flow channel opening (111), and the first valve housing (12) is provided with a second pipeline cavity (121) corresponding one-to-one to the first pipeline cavity (131), and the two ends of the second pipeline cavity (121) are respectively connected to the first pipeline cavity (131) and the first valve cavity (101), and a third sealing ring (63) is provided between the second pipeline cavity (121) and the first valve core (2).

4. The vehicle integrated water valve according to claim 3, characterized in that: The second conduit cavity (121) is arranged in a circumferential array outside the first valve cavity (101), and the second conduit cavity (121) includes a longitudinal flow channel (1211) connected to the first conduit cavity (131) and a transverse flow channel (1212) connected to the first valve cavity (101), and the opening of the first valve core flow channel (20) on the first valve core (2) corresponds to the transverse flow channel (1212).

5. The vehicle integrated water valve according to claim 4, characterized in that: The transverse flow channel (1212) is open at one end near the valve cover (14). The valve cover (14) includes a flow channel cover (141) and a valve cavity cover (142). The flow channel cover (141) is mounted on the first valve housing (12). The flow channel cover (141) includes a cover body (1411) adapted to the open end of the transverse flow channel (1212). The flow channel cover (141) also includes a valve cavity wall (1412) that is circumferentially closed and open at both ends axially. The cover body (1411) is connected to the outside of the valve cavity wall (1412), the first valve core (2) is arranged on the inside of the valve cavity wall (1412), the valve cavity cover (142) is arranged on the end of the valve cavity wall (1412) away from the first valve shell (12), the valve cavity cover (142) is provided with a through hole corresponding to the drive connection structure (22), and a second sealing ring (62) is provided between the valve cavity cover (142) and the drive connection structure (22).

6. The vehicle integrated water valve according to claim 5, characterized in that: The number of the second pipe cavities (121) is four and they are arranged in an even array in the circumferential direction. The number of the first valve core flow channels (20) is two, and the four ports corresponding to a pair of first valve core flow channels (20) are evenly arranged on the side of the first valve core (2) in the circumferential direction.

7. The vehicle integrated water valve according to claim 1, characterized in that: The second valve core flow channel (30) is arranged on the side of the second valve core (3) near the connecting end (11), and the opening of the second valve core flow channel (30) faces the second flow channel opening (112); a spring (4) is provided on the side of the second valve core (3) away from the connecting end (11), and the spring (4) is in contact between the second valve core (3) and the first valve housing (12); a sealing gasket (64) is provided on the side of the second valve chamber (102) near the connecting end (11).

8. The vehicle integrated water valve according to claim 2, characterized in that: A calibration step (122) is provided on one side of the first valve housing (12) near the second valve core (3), a limiting step (32) is provided on the second valve core (3) corresponding to the calibration step (122), and a rotation gap is provided between the limiting step (32) and the calibration step (122) in the circumferential direction; The drive connection structure (22) is provided with a circumferential positioning structure (221), and the circumferential positioning structure (221) is used to cooperate with the driver input shaft to determine the circumferential posture of the circumferential first valve core (2) relative to the driver input shaft.

9. The vehicle integrated water valve according to claim 7, characterized in that: A pressure balancing chamber (123) is provided between the second valve core (3) and the first valve housing (12), wherein a through hole (303) communicating with the pressure balancing chamber (123) is provided on one of the second valve core flow channels (30).

10. The vehicle integrated water valve according to claim 7, characterized in that: The number of the second flow channel openings (112) is 5, including a central flow channel opening (1121) and 4 outer flow channel openings (1122) arranged in a circumferential array outside the central flow channel opening (1121); The number of the second valve core flow channels (30) is two, including a flow channel A (301) connecting the central flow channel opening (1121) and an outer flow channel opening (1122), and a flow channel B (302) connecting the pair of outer flow channel openings (1122).

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