CN211009996U

CN211009996U - Multi-valve device for vehicle

Info

Publication number: CN211009996U
Application number: CN201921352632.9U
Authority: CN
Inventors: 金洪宣; 金明烨; 李现权; 黄仁成
Original assignee: Inzi Controls Co Ltd
Current assignee: Inzi Controls Co Ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-07-14
Anticipated expiration: 2029-08-20
Also published as: KR20210022507A; KR102339636B1

Abstract

The utility model discloses a multi-valve device for vehicle. The utility model discloses multi-valve device for vehicle includes: a valve housing having one or more ports for allowing fluid to flow in or out; a valve main body portion rotatably provided in the valve housing, having one or more openings selectively communicating with the inlet and outlet, and selectively opening and closing the inlet and outlet; and a sealing member provided between the valve cover and the valve body so that at least a part of the sealing member is in close contact with the valve body to maintain airtightness around the opening, wherein a recessed portion is formed in an outer peripheral surface of the valve body, a distance between the recessed portion and a central axis of the valve body is smaller than a radius of the valve body, and a parting line formed in a manufacturing process of the valve body is formed in the recessed portion.

Description

Multi-valve device for vehicle

Technical Field

The present invention relates to a vehicular multi-valve device for controlling the flow of fluid such as cooling water of a vehicle engine, and more particularly, to a vehicular multi-valve device which can improve the sealing property between a valve main body and an inlet/outlet by forming a recess in the outer peripheral surface of the valve main body to prevent a burr (burr) formed along a parting line (parting line) from coming into contact with a sealing member in a manufacturing process of injection molding using the valve main body.

Background

In a vehicle driven by an internal combustion engine, various valve devices are provided which can distribute, control and restrict the flow of various fluids according to the purposes such as cooling of the engine, cooling and heating of an indoor space, exhaust gas recirculation (EGR system) and the like.

Among such valve devices, a valve device in which a flow path of a fluid is controlled to 2 or more directions is called a multi-directional switching valve device or a multi-valve device, and such a multi-valve device is mainly used for a cooling water circulation circuit of an internal combustion engine.

On the other hand, in such a multi-valve device, a valve body portion is provided inside a valve housing so as to be rotatable for distributing cooling water in a plurality of directions, and such a valve body portion is generally manufactured by injection molding by combining a plurality of molds.

In this case, a parting line is formed at a portion where the surface of the valve body portion contacts with the plurality of molds, and a concave-convex portion based on burrs formed along the parting line is formed, and when the seal member of the rotary valve is brought into close contact with the outer peripheral surface of the valve member, the concave-convex portion contacts with the seal member, whereby there is a problem that the seal surface of the seal member is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vehicle is with many valve gear, promptly, form the depressed part at the outer peripheral face of valve part to prevent that the burr that the parting line that forms in the manufacturing process along the valve main part forms is outstanding to the outside of the outer peripheral face of valve main part, when sealing member hugs closely at the valve part, the accessible prevents that the burr and the sealing member of parting line from contacting and prevents that sealing member from taking place wearing and tearing or warping and can improve sealing performance.

The utility model relates to a multi-valve device for vehicle, include: a valve housing having one or more ports for allowing fluid to flow in or out; a valve main body portion rotatably provided in the valve housing, having one or more openings selectively communicating with the inlet and outlet, and selectively opening and closing the inlet and outlet; and a sealing member provided between the valve cover and the valve body so that at least a part of the sealing member is in close contact with the valve body to maintain airtightness around the opening, wherein a recessed portion is formed in an outer peripheral surface of the valve body, a distance between the recessed portion and a central axis of the valve body is smaller than a radius of the valve body, and a parting line formed in a manufacturing process of the valve body is formed in the recessed portion.

Furthermore, the present invention is characterized in that the maximum depth of the recess is in the range of 0.05mm to 0.15 mm.

In addition, the maximum depression depth of the depressed portion is a distance from a center portion of the bottom surface of the depressed portion to an extension line of the outer peripheral surface of the valve main body portion.

In addition, according to the present invention, a gap is formed between the valve body and the sealing member by the recessed portion, and the burr formed along the parting line does not contact the sealing member by the gap.

Further, the present invention is characterized in that the circumferential width of the recessed portion is proportional to the product of the maximum depth of depression in the radial direction of the recessed portion and the value obtained by subtracting the maximum depth of depression in the radial direction of the recessed portion from the diameter of the valve body portion.

Furthermore, the present invention is characterized in that when the maximum depression depth in the radial direction of the depressed portion is H, the radius of the valve body portion is R, and the width in the circumferential direction of the depressed portion is W, the following mathematical formula is satisfied:

furthermore, the present invention is characterized in that the maximum depth H of the recess in the diametrical direction is adjusted by adjusting the width W of the recess in the circumferential direction, and the maximum depth H of the recess in the diametrical direction is greater than the length of the burr formed along the parting line.

In addition, the present invention is characterized in that the burr formed along the parting line is formed at a central portion of the depressed portion.

Furthermore, the present invention is characterized in that the parting line is one of a straight line, a curved line and a broken line.

In addition, the present invention is characterized in that the valve body is formed by injection molding using a frame coupled to a plurality of molds, and the recessed portions are formed flat or in a protruding shape so that the edge portions of the molds correspond to the shape of the recessed portions.

Further, the present invention is characterized in that the recessed portion is formed in one of a horizontal plane, a step shape, a V-shape, and a semicircular shape.

Furthermore, an embodiment of the present invention provides a vehicle multi-valve device, including: a valve housing having one or more ports for allowing fluid to flow in or out; a valve main body portion rotatably provided in the valve housing, having one or more openings selectively communicating with the inlet and outlet, and selectively opening and closing the inlet and outlet; and a seal member provided between the valve cover and the valve body so that at least a part of the seal member is in close contact with the valve body to maintain airtightness around the opening, wherein a recessed portion is formed on the outer peripheral surface of the valve body so as to be recessed by a predetermined depth along the inside in the diameter direction of the outer peripheral surface of the valve body, the maximum recessed depth of the recessed portion is a distance from the center of the bottom surface of the recessed portion to an extension line of the outer peripheral surface of the valve body, and the maximum recessed depth of the recessed portion is within a predetermined length range.

In addition, the present invention is characterized in that a parting line is formed in the recessed portion in the manufacturing process of the valve body portion, a gap is formed between the valve body portion and the sealing member through the recessed portion, and a burr formed along the parting line does not contact the sealing member through the gap.

According to the utility model discloses, the accessible forms the depressed part at the outer peripheral face of valve main part and prevents sealing member and the burr direct contact who forms along the parting line, from this, can prevent sealing member's sealed face and take place wearing and tearing or warp to can solve the problem that sealing performance reduces rapidly.

Further, the maximum depression depth of the depression portion ranges from 0.05mm to 0.15mm, whereby the sealing area of the valve main body portion is prevented from being narrowed, and burrs formed at the time of injection molding of the valve main body portion are covered with the maximum depression depth of the depression portion, whereby the burrs can be prevented from protruding outside the outer peripheral surface of the valve main body portion.

Drawings

Fig. 1 is an exploded perspective view of a vehicular multi-valve device according to an embodiment of the present invention.

Fig. 2 is a diagram schematically illustrating a process of manufacturing a valve main body portion of the vehicular multi-valve device of fig. 1 using a mold.

Fig. 3 is a view schematically showing a state in which a seal member is in close contact with the valve body portion of fig. 1.

Fig. 4 is a view showing a form in which a recessed portion is formed in the valve main body portion of fig. 2 and a parting line is formed in the recessed portion.

Fig. 5 is a sectional view of the valve main body portion of fig. 4 as viewed from above.

Fig. 6 is a diagram schematically showing the relationship among the radius R of the valve main body portion, the circumferential width W of the recessed portion formed in the valve main body portion, and the maximum recessed depth H of the recessed portion in fig. 5.

Fig. 7 is a diagram illustrating various shapes of the concave portion according to an embodiment of the present invention.

Description of reference numerals

1: multi-valve device for vehicle

10: valve outer cover

11. 12, 13: entrance and exit

20: valve body

21. 22: opening of the container

30: sealing member

40: concave part

50: parting line

60: burrs of a ship

Detailed Description

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. The idea of the present invention is not limited to the following embodiments, and the idea of the present invention may be changed by adding, changing, deleting, and the like according to the structural elements forming the embodiments, and these also belong to the idea of the present invention.

Referring to fig. 1 and 2, a multi-valve device 1 for a vehicle according to an embodiment of the present invention includes a valve cover 10, a valve body 20, and a sealing member 30.

The vehicular multi-valve device 1 described in the present invention is applicable to various vehicles using fuel sources such as gasoline, diesel, hybrid, electric energy, and hydrogen, and the description will be given below by taking, as an example, a cooling water circulation circuit in which the vehicular multi-valve device 1 is applied to an automobile engine.

The vehicular multi-valve device 1 includes a valve cover 10 and a valve body 20, and opens and closes a flow path of a fluid including cooling water of a vehicle.

The valve housing 10 is provided with a plurality of

ports

11, 12, 13 through which fluid, for example, cooling water for an engine can be communicated, and fluid such as cooling water can flow in or out through the

ports

11, 12, 13.

The valve housing 10 may house the valve main body 20 therein, and may be provided with a first port 11, a second port 12, and a third port 13 connected to the engine E, the radiator R, and the cooler C, respectively. The first port 11 is connected to the engine E so that heated cooling water can flow therein, and the second port 12 and the third port 13 can discharge the cooling water to the radiator R and the cooler C, respectively.

The positions of the first doorway 11, the second doorway 12, and the third doorway 13 shown in fig. 1 are exemplary positions, but the present invention is not limited thereto. The number of entrances and exits is not limited to the first entrance and exit 11, the second entrance and exit 12, and the third entrance and exit 13, and the number of entrances and exits may be changed according to the application target.

The valve main body portion 20 is rotatably provided inside the valve housing 10. The valve main body portion 20 may be coupled with a rotation shaft rotatably coupled with the valve housing 10. The rotary shaft coupled to the valve main body 20 may be connected to an actuator such as a drive motor or other electric element, and may be rotated by receiving power from such an actuator.

A plurality of

inlets

11, 12, 13 may be provided around the outer peripheral surface of the valve main body 20, and one or

more openings

21, 22 may be formed in the valve main body 20, and the

openings

21, 22 selectively communicate with the

respective inlets

11, 12, 13 formed in the valve housing 10. The

openings

21 and 22 are formed by cutting the outer peripheral surface of the valve body 20 into a predetermined shape.

When the

openings

21 and 22 of the valve main body 20 communicate with the

ports

11, 12, and 13, fluid such as cooling water can flow into the chamber formed inside the valve main body through the

ports

11, 12, and 13, and fluid such as cooling water can flow out from the chamber inside the valve main body 20 to the port P.

On the contrary, when the

ports

11, 12, and 13 are closed by the outer peripheral surface of the valve main body 20 in which the

openings

21 and 22 are not formed, the

ports

11, 12, and 13 are blocked, and the fluid such as the cooling water cannot flow out or in through the

ports

11, 12, and 13.

Therefore, it is preferable that the size of the

openings

21, 22 corresponds to the size of the

respective ports

11, 12, 13.

A chamber capable of containing fluid may be provided inside the valve main body portion 20. The chamber functions as a flow path through which a fluid such as cooling water can flow, and provides a space in which the fluid such as cooling water can be temporarily stored, as a space formed inside the valve main body 20.

The sealing member 30 may be disposed between the valve housing 10 and the valve main body portion 20. The sealing member 30 is used to hermetically seal the plurality of

ports

11, 12, and 13 and the valve body 20, and at least a part thereof can be in close contact with the outer peripheral surface of the valve body 20, and can maintain the airtightness around the

openings

21 and 22 formed in the valve body 20.

The seal member 30 is in close contact with the periphery of the

openings

21, 22 formed in the valve body 20, and prevents the fluid such as cooling water from leaking to the outside of the valve body 20 or between the valve body 20 and the valve cover 10 when the fluid flows out through the

openings

21, 22 of the valve body 20 to the

ports

11, 12, 13 or flows in through the

ports

11, 12, 13 to the

openings

21, 22 of the valve body 20.

The sealing member 30 may be provided in each of the

ports

11, 12, and 13, and may preferably be disposed between the valve main body 20 and the

ports

11, 12, and 13.

The sealing member 30 may have a circular shape so as to correspond to the shape of the inlet and

outlet

11, 12, 13, and may have a through hole formed in the center thereof so as to allow a fluid such as cooling water to pass therethrough.

Fig. 2 is a diagram schematically illustrating a process of manufacturing a valve main body portion of the vehicular multi-valve device of fig. 1 using a mold. Fig. 3 is a view schematically showing a state in which a seal member is in close contact with the valve body portion of fig. 1. Fig. 4 is a view showing a form in which a recessed portion is formed in the valve main body portion of fig. 2 and a parting line is formed in the recessed portion. Fig. 5 is a sectional view of the valve main body portion of fig. 4 as viewed from above. Fig. 6 is a diagram schematically showing the relationship among the radius R of the valve main body portion, the circumferential width W of the recessed portion formed in the valve main body portion, and the maximum recessed depth H of the recessed portion in fig. 5.

Referring to fig. 2 to 6, a recessed portion 40 recessed a predetermined depth inward in the diameter direction of the outer peripheral surface of the valve body 20 may be provided on the outer peripheral surface of the valve body 20.

The distance from the central axis of the valve main body 20 to the recessed portion 40 may be smaller than the radius of the valve main body 20 as the recessed portion 40 is recessed to a predetermined depth inward in the diameter direction of the outer peripheral surface of the valve main body 20.

The recess 40 may be formed in a horizontal plane on the outer circumferential surface of the valve main body 20. The recess 40 may have a prescribed width and may extend from the upper end to the lower end of the valve main body 20.

More specifically, the recess 40 is a portion in which a part of the outer peripheral surface of the valve main body 20, which is curved as a whole, is formed as a horizontal surface, and the shape thereof can be determined in the process of injection molding the valve main body 20.

Of course, the shape of the recess 40 is not limited to a flat horizontal surface, and may be various shapes such as a stepped shape, a V-shape, and a semicircular shape as shown in fig. 7.

Referring to fig. 2, the valve body part 20 may be manufactured by injection molding through a frame combined with a plurality of molds M.

In order to form the recessed portion 40 in the valve body portion 20, a part of the inner peripheral surface of the mold M has a flat surface or a protruding surface so as to correspond to the shape of the recessed portion 40. In other words, the outer peripheral surface shape of the valve main body portion 20 can be changed by adjusting the inner peripheral surface shape of the mold M, and the recessed portion 40 can be formed at a desired position of the valve main body portion 20.

Specifically, it is preferable that such a recessed portion 40 be formed at a portion where a parting line 50 is formed in the valve main body portion 20. The portion where the parting line 50 is formed in the valve main body portion 20 is a portion combined with each mold M, and therefore, the portion to be combined with each mold M, that is, the edge portion of each mold M is formed flat or in a protruding form so as to correspond to the shape of the recess 40, so that the recess 40 can be formed in the valve main body portion 20. In this way, a parting line 50 formed in the process of making the valve body portion 20 may be formed in the depression 40, and a burr 60 may be formed along the parting line 50. Such a burr 60 is a portion that is brought into contact with the mold M and has a protruding shape due to leakage of resin used for manufacturing the valve body 20.

Referring to fig. 5, the recess 40 makes a portion where a parting line 50 is formed in the valve main body portion 20 into a horizontal plane, and a gap may be formed between the valve main body portion 20 and the sealing member 30 by such a recess 40.

As described above, by forming a gap between the valve body 20 and the seal member 30, the seal member 30 can be prevented from directly contacting the burr 60 formed along the parting line 50, and thus, the problem of rapid deterioration of the sealing performance can be solved by preventing the seal surface of the seal member 30 from being worn or deformed.

Specifically, it is preferable that the maximum depression depth H of the depression 40 is in the range of 0.05mm to 0.15 mm.

The maximum depression depth H of the depressed portion 40 is a distance from a center of a bottom surface of the depressed portion 40 to a virtual extension line of the outer peripheral surface of the valve main body portion 20. More specifically, as shown in fig. 5, an extension line of the outer peripheral surface of the valve main body portion 20 is a portion marked with a dotted line on the outer peripheral surface of the valve main body portion 20, that is, the outer peripheral surface of the valve main body portion 20 before the recessed portion 40 is formed, and the maximum recessed depth H of the recessed portion 40 refers to a distance between such an extension line and the bottom surface center portion of the recessed portion 40.

The maximum recess depth H of the recess 40 is in the range of 0.05mm to 0.15mm in order to cover the maximum length of the burr 60 formed during the injection molding of the valve main body portion 20 and maintain the sealing effect of the spherical valve main body portion 20.

Generally, the maximum height of the burr 60 formed when injection molding may reach 0.05mm, and therefore, if the maximum depression depth H of the depression 40 is less than 0.05mm, the sealing member 30 comes into contact with the burr 60 and causes damage to the sealing surface, and therefore, it is preferable that the maximum depression depth H of the depression 40 is more than 0.05 mm.

Further, if the maximum depression depth H of the depression portion 40 is greater than 0.15mm, the area sealed by the sealing member 30 becomes small, and a problem of reduction in the sealing effect by the sealing member 30 may occur, and therefore, it is preferable that the maximum depression depth H of the depression portion 40 is less than 0.15 mm.

More specifically, the circumferential width W of the valve main body 20 of the recessed portion 40, which is formed in the recessed portion 40 of the valve main body 20 such that the maximum recessed depth H is in the range of 0.05mm to 0.15mm, can be determined by the following equation (see fig. 6):

(wherein H is the maximum depression depth of the depression portion, R is the radius of the valve main body portion, and W is the width of the depression portion.)

The circumferential width W of the recessed portion 40 is proportional to the product of the maximum recessed depth H of the recessed portion 40 in the radial direction and the value obtained by subtracting the maximum recessed depth H of the recessed portion 40 in the radial direction from the diameter 2R of the valve main body portion 20.

According to the above mathematical expression, as the maximum recess depth H of the recess 40 increases, the width W of the recess 40 becomes wider, and therefore, it may eventually result in a reduction in the area sealed by the sealing member 30 and a reduction in the sealing effect. As described above, the maximum depression depth H of the depression 40 is preferably less than 0.15 mm.

Further, according to the above mathematical expression, the maximum depression depth H in the diameter direction of the depressed portion 40 can be adjusted by adjusting the width W in the circumferential direction of the depressed portion 40, and therefore, such maximum depression depth H in the diameter direction of the depressed portion 40 is larger than the length of the burr formed along the parting line 50.

For example, when the radius R of the valve body 20 is 29.5mm and the maximum recess depth H of the burr 60 which can be covered by the recess 40 is 0.05mm, the width W of the recess 40 is as follows,

in the case where the maximum depression depth H of the burr 60, which the depression 40 can cover, is 0.15mm, the width W of the depression 40 is as follows, that is,

in other words, it is preferable that the width W of the recess 40, which makes the maximum recess depth H of the recess 40 in the range of 0.05mm to 0.15mm, be in the range of 3.4mm to 6mm in the case where the radius R of the valve main body portion 20 is 29.5 mm.

Accordingly, the maximum recess depth H that can cover the burr 60 formed when the valve body portion 20 is injection molded can be maintained within an appropriate range without the sealing area of the valve body portion 20 becoming too narrow.

The groove of the recess 40 may have a horizontal surface in which a part of the outer peripheral surface of the valve main body 20 is formed, as shown in fig. 3 or 5, but may have various shapes such as a stepped shape (see fig. 7 a), a V-shape (see fig. 7 b), and a semicircular shape (see fig. 7 c), as shown in fig. 7.

As described above, in order to form the depressed portions 40 in various shapes, the inner peripheral surface of the mold M is protruded so as to correspond to the shape of the depressed portions 40, thereby adjusting the shape of the depressed portions 40.

As described above, when the shape of the recess 40 is a stepped shape, a V-shape, or a semicircular shape, the maximum recess depth H of the recess 40 is preferably in the range of 0.05mm to 0.15 mm.

The parting line 50 formed along the recessed portion 40 may have various shapes such as a straight line, a curved line, and a broken line in a vertical direction (which means a rotation axis direction of the valve body 20) from the outer peripheral surface of the valve body 20.

The embodiments of the present invention are merely exemplary embodiments, and those skilled in the art can understand that various modifications and equivalent other embodiments can be made. Therefore, the true scope of the present invention is defined only by the claims.

Claims

1. A vehicular multi-valve device characterized in that,

the method comprises the following steps:

a valve housing having one or more ports for allowing fluid to flow in or out;

a valve main body portion rotatably provided in the valve housing, having one or more openings selectively communicating with the inlet and outlet, and selectively opening and closing the inlet and outlet; and

a sealing member provided between the valve cover and the valve body so that at least a part of the sealing member is in close contact with the valve body and maintains airtightness around the opening,

a recessed portion is formed on an outer peripheral surface of the valve main body, a distance between the recessed portion and a central axis of the valve main body is smaller than a radius of the valve main body,

and forming a parting line in the manufacturing process of the valve main body part on the concave part.

2. The vehicular multi-valve device according to claim 1, wherein the maximum recess depth of the recess portion ranges from 0.05mm to 0.15 mm.

3. The vehicular multi-valve device according to claim 2, wherein the maximum depression depth of the depressed portion indicates a distance from a center portion of a bottom surface of the depressed portion to an extension line of the outer peripheral surface of the valve main body portion.

4. The vehicular multi-valve device according to claim 3, wherein a gap is formed between the valve body portion and the seal member by the recessed portion, and a burr formed along the parting line does not contact the seal member by the gap.

5. The vehicular multi-valve device according to claim 1, wherein a circumferential width of the recessed portion is proportional to a product of a maximum recessed depth value in a radial direction of the recessed portion and a value obtained by subtracting the maximum recessed depth value in the radial direction of the recessed portion from a diameter of the valve main body portion.

6. The vehicular multi-valve device according to claim 5, wherein when a maximum recess depth in a radial direction of the recess portion is H, a radius of the valve main body portion is R, and a width in a circumferential direction of the recess portion is W, the following numerical expression is satisfied:

7. the vehicular multi-valve device according to claim 6, wherein a maximum depression depth (H) in a diameter direction of the depression is adjusted by adjusting a circumferential width (W) of the depression, and the maximum depression depth (H) in the diameter direction of the depression is larger than a length of the burr formed along the parting line.

8. The vehicular multi-valve device according to claim 4, wherein the burr formed along the parting line is formed at a central portion of the recessed portion.

9. The vehicular multi-valve device according to claim 1, wherein the parting line is one of a straight line, a curved line and a broken line.

10. The vehicular multi-valve device according to claim 1,

the valve main body is formed by injection molding through a frame combined with a plurality of molds,

the recessed portion is formed flat or in a protruding shape so that the edge portion of each of the molds corresponds to the shape of the recessed portion.

11. The vehicular multi-valve device according to claim 10, wherein the recess has one of a horizontal surface, a stepped shape, a V-shape, and a semicircular shape.

12. A vehicular multi-valve device characterized in that,

the method comprises the following steps:

a valve housing having one or more ports for allowing fluid to flow in or out;

a recessed portion recessed by a predetermined depth along a radially inner side of an outer peripheral surface of the valve body portion is formed on the outer peripheral surface of the valve body portion,

the maximum depression depth of the depression portion is a distance from a center portion of a bottom surface of the depression portion to an extension line of an outer peripheral surface of the valve main body portion, and the maximum depression depth of the depression portion is within a predetermined length range.

13. The vehicular multi-valve device according to claim 12,

a parting line formed in the manufacturing process of forming the valve body part in the recess part,

a gap is formed between the valve body and the seal member by the recessed portion, and a burr formed along the parting line does not contact the seal member by the gap.

14. The vehicular multi-valve device according to claim 12, wherein the maximum recess depth of the recess portion ranges from 0.05mm to 0.15 mm.

15. The vehicular multi-valve device according to claim 13, wherein a circumferential width of the recessed portion is proportional to a product of a maximum recessed depth value in a radial direction of the recessed portion and a value obtained by subtracting the maximum recessed depth value in the radial direction of the recessed portion from a diameter of the valve main body portion.

16. The vehicular multi-valve device according to claim 15, wherein when a maximum recess depth in a radial direction of the recess portion is H, a radius of the valve main body portion is R, and a width in a circumferential direction of the recess portion is W, the following numerical expression is satisfied:

17. the vehicular multi-valve device according to claim 16, wherein a maximum depression depth (H) in a diameter direction of the depression is adjusted by adjusting a circumferential width (W) of the depression, and the maximum depression depth (H) in the diameter direction of the depression is larger than a length of the burr formed along the parting line.

18. The vehicular multi-valve device according to claim 12,

19. The vehicular multi-valve device according to claim 18, wherein the recess has one of a horizontal surface, a stepped shape, a V-shape, and a semicircular shape.