KR101720508B1 - a purifier having valve with writhing of door opening and closing - Google Patents

Abstract

The disclosed contents can open and close a flow path in which raw water or the like is moved when a door (or a cover can be used) is opened or closed to replace a water filter or the like,
The water purifier including the valve for opening and closing the flow path of the door according to the embodiment of the present invention,
A purifier main body having a water filter for purifying foreign matters contained in raw water;
An external force supply source that is openably and closably mounted to the purifier body;
Wherein the water supply passage is opened or closed by a plunger which is interlocked and moved in the axial direction when the external power supply source is opened or closed so as to open or close the raw water flow passage for supplying raw water to the first front water filter of the water filter, An opening / closing valve for the moving water passage;
And a discharge port for discharging the purified water purified by the water filter. The water purifier of the present invention includes a valve for opening and closing the flow path for opening and closing the door.

Description

[0001] The present invention relates to a purifier having a valve for opening and closing a door,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a water purifier having a valve for opening and closing a channel to be opened and closed when a door is opened and closed. In particular, when a door (or a cover can be used) To the water purifier.

In the water purifier provided with the multi-stage water filter according to the prior art shown in FIG. 1,

A water purifier main body 5 provided with water purifiers 1, 2, 3, 4 for purifying foreign matters contained in raw water (tap water or the like) flowing through a faucet or the like;

A manual valve (7) for opening and closing a raw water moving passage (6) for supplying raw water to the first front water filter (1) among the water filters (1, 2, 3, 4);

And a cock (8) for discharging purified water purified by the water filter (1, 2, 3, 4).

Reference numeral 9 in the drawing denotes a door that is openably and closably mounted on the purifier body 5. [

The water filter (1) is a sediment filter that filters rust, soil, suspended solids and the like contained in raw water with a nonwoven fabric. The water filter (2) is a free carbon filter And the water filter 3 is a UF that filters bacteria, inorganic substances, and the like in water with a polyamide composite membrane. The water filter 4 is a post carbon filter that treats water components, odors,

The water purifier according to the related art is configured such that when the water purifier filter (1, 2, 3, 4) is to be replaced, the water purifier main body (5) (7) to the closed state.

In order to remove the residual pressure inside the water filters 1, 2, 3, 4, the cock 8 is opened to discharge the residual water. Therefore, it is possible to replace the water filter of the water purifier (1, 2, 3, 4) with the door (9) opened.

In order to operate the water purifier again after replacing the water filters 1, 2, 3 and 4, the manual water valve 6 is opened by operating the manual valve 7, The door 9 is closed.

As a result, users can not easily replace the water filter (1, 2, 3, 4) and contact the service center to replace the water filter.

In the embodiment of the present invention, when the door is opened or closed to replace the water filter or the like, the raw water moving passage or the residual pressure discharging passage to which the raw water or the like is moved automatically opens and closes the door so that convenience and practicality can be provided to the user The present invention relates to a water purifier provided with a valve for opening and closing a channel interlocked with the opening and closing of a door.

An embodiment of the present invention relates to a water purifier provided with a valve for opening and closing a flow path which is interlocked when opening and closing a door so as to simplify a valve structure that is interlocked with a door opening and closing operation and opens or closes a raw water flow passage or a residual pressure discharge passage.

The water purifier including the valve for opening and closing the flow path of the door according to the embodiment of the present invention,

A purifier main body having a water filter for purifying foreign matters contained in raw water;

An external force supply source that is openably and closably mounted to the purifier body;

Wherein the water supply passage is opened or closed by a plunger which is interlocked and moved in the axial direction when the external power supply source is opened or closed so as to open or close the raw water flow passage for supplying raw water to the first front water filter of the water filter, An opening / closing valve for the moving water passage;

And a discharge port for discharging the purified water purified by the water filter. The water purifier of the present invention includes a valve for opening and closing the flow path for opening and closing the door.

The water purifier including the valve for opening and closing the flow path of the door according to the embodiment of the present invention,

A purifier main body having a water filter for purifying foreign matters contained in raw water;

An external force supply source that is openably and closably mounted to the purifier body;

A residual pressure releasing passage that is openable and closable in a residual pressure discharge passage connected to any one of the water filters of the water purifier and opens or closes the residual pressure discharge passage by a plunger interlocked when the external force supply source is opened or closed, A discharge passage opening / closing valve;

And a discharge port for discharging the purified water purified by the water filter. The water purifier of the present invention includes a valve for opening and closing the flow path for opening and closing the door.

More preferably, the discharge portion is characterized in that a coke or a powder is used.

The raw water movement passage opening / closing valve or the residual pressure discharge passage opening /

A valve body having an inlet and an outlet through which fluid is introduced and discharged;

A plunger which is coupled to the valve body so as to be able to move up and down; a plunger having a communication portion for communicating the inlet and the outlet when the plunger is moved by a predetermined distance by pressing; and a closing portion for closing the inlet and the outlet when the external force Formed on the outer periphery;

The plunger is disposed between the lower end of the plunger and the seating groove of the valve body facing the plunger, and the plunger is moved to the initial position by an elastic restoring force so as to close the inlet and the outlet by the closing portion when an external force, And an elastic body for returning the elastic body.

The raw water movement passage opening / closing valve or the residual pressure discharge passage opening /

A valve body formed with an inlet and an outlet through which fluid is introduced and discharged, and a fluid transfer passage communicating with the inlet and the outlet;

Wherein the plunger is configured to open and close the fluid transfer passage when the plunger is moved by a predetermined distance by pressing the plunger, Closing the passageway.

An elastic body provided between a lower end of the plunger and a seating groove of the valve body facing the plunger and returning the plunger to an initial position by an elastic restoring force to close the fluid transfer path when an external force urged by the plunger is removed, .

A key groove formed in an inner side surface of the through hole of the valve plug of the valve body and a key formed on the outer surface of the plunger so as to correspond to the key groove,

When the plunger is pushed in the axial direction and the key is detached from the key groove, the key is positioned in an area excluding the key groove when the plunger is rotated by an arbitrary angle, so that the inlet and the outlet are maintained in a communicated state .

A key groove formed in an inner side surface of the through hole of the valve plug of the valve body and a key formed on the outer surface of the plunger so as to correspond to the key groove,

When the plunger is pressed in the axial direction to release the key from the key groove, when the plunger is rotated by an arbitrary angle, the key is positioned in an area excluding the key groove, thereby keeping the fluid movement path open .

The external force source

A sliding type door which is slidably moved along the guide rail to the water purifier main body or a sliding type door which is opened and closed by fastening and dismounting the screw to the water purifier main body, And a door is used.

The internal residual pressure discharge from the purifier body when the residual pressure discharge passage opening / closing valve is opened,

Pressure discharge pipe connected to the discharge port of the residual pressure discharge passage on-off valve, or the discharge port of the residual pressure discharge passage on-off valve, It is discharged through a water receiver.

The embodiment of the present invention configured as described above has the following advantages.

When the door is opened or closed to replace the water filter or the like, the raw water moving passage through which the raw water or the like is moved or the residual pressure discharging passage through which the internal residual pressure is discharged is automatically opened and closed, thereby providing convenience and practicality to the user.

In addition, when the raw water transfer passage or the residual pressure discharge passage is opened or closed by a valve interlocked at the time of door opening / closing, cost and installation cost can be reduced by using a simple structure valve.

1 is a schematic view of a water purifier provided with a multi-stage water filter according to the prior art,
2 (a) and 2 (b) are views showing a water purifier having a valve for opening and closing a channel interlocked at the time of door opening / closing according to an embodiment of the present invention, Fig.
Fig. 3 (ab) shows a water purifier having a valve for opening and closing the oil path interlocked at the time of door opening / closing according to an embodiment of the present invention, and a residual pressure discharge passage opening / closing valve interlocked with opening and closing of the door to open / drawing,
4 (a) and 4 (b) are views for explaining a water purifier having a valve for opening and closing a passage interlocked with a door in accordance with another embodiment of the present invention, Fig.
5 (a) and 5 (b) are views showing a water purifier provided with a valve for opening and closing a flow path of a door according to another embodiment of the present invention, Fig.
6 is a use state diagram of a water purifier including a valve for opening and closing a flow path that is interlocked with a door in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.

The water purifier provided with the valve for opening and closing the flow path interlocked at the time of door opening / closing according to the embodiment of the present invention shown in Figs. 2 (a), (b)

A purifier main body 5 provided with water filters 1, 2, 3, 4 for purifying foreign matters contained in raw water;

(For example, a door 9 or a cover may be used) which is openably and closably mounted on the purifier body 5;

(6) for supplying raw water to the first front water filter (1) among the water filters (1, 2, 3, 4), and when the door (9) is opened or closed, Closing valve (A) for closing the raw water moving passage (6) by a plunger (13) slidably moving in the axial direction;

A coke (8) or a faucet (21) for discharging purified water purified by the water filter (1, 2, 3, 4);

Pressure discharge passage (26) connected to any one of the water filters (1, 2, 3, 4), and when the door (9) is opened or closed, Off valve (B) for opening and closing the residual pressure discharge passage (26) by a plunger (13) serving as a residual pressure discharge passage.

The open / close valve A for the raw water flow passage according to the embodiment of the present invention shown in Figs. 2 (a) and (b)

A valve body 12 having an inlet 10 and an outlet 11 through which fluids such as raw water (tap water or the like) are introduced and discharged;

A plunger 13 which is movably coupled to the valve body 12 and a plunger 13 which communicates the inlet 10 and the outlet 11 when the plunger 13 is moved by a predetermined distance by pressing, (15) (e.g., a packing is used) for closing the inlet (10) and the outlet (11) are formed on the outer periphery, respectively, when the external force pressing the plunger (13) is removed;

Wherein the valve body is provided between the lower end of the plunger and the seating groove of the valve body facing the valve body when the plunger is removed, An elastic body 17 (for example, a compression coil spring or the like can be used) for returning the plunger 13 to the initial position by an elastic restoring force to close the inlet 10 and the discharge port 11.

The open / close valve A for the raw water flow passage according to another embodiment of the present invention shown in Figs. 4 (a) and 4 (b)

A valve body 19 formed with an inlet port 10 and an outlet port 11 through which fluids are introduced and discharged and in which a fluid flow passage 18 for communicating the inlet 10 and the outlet 11 is formed;

A plunger 20 which is movably coupled to the valve body 19 so as to open and close the fluid transfer passage 18; and the plunger 20 is configured to open and close the fluid transfer passage 18 when moved by a predetermined distance, And closes the fluid transfer passage (18) when an external force is applied to the plunger (20).

4A and 4B, the opening / closing valve A for the raw water flow passage according to another embodiment of the present invention includes a plunger 20, (22) which is provided between the plunger (16) and returns the plunger (20) to the initial position by an elastic restoring force so as to close the fluid transfer passage (18) (For example, a compression coil spring or the like may be used).

As shown in FIG. 2A, the opening / closing valve A for the raw water moving passage according to the embodiment of the present invention is provided with a key groove (not shown) formed on the inner side surface of the through hole of the valve plug 23 of the valve body 12 And a key 25 formed on the outer surface of the plunger 13 so as to correspond to the key groove 24,

When the key 25 is released from the key groove 24 by pressing the plunger 13 in the axial direction, when the plunger 13 is rotated by an arbitrary angle (for example, 90 degrees) The key 25 is positioned in an area other than the key groove 24 so that the inlet 10 and the outlet 11 can be maintained in a communicated state.

As shown in FIG. 4 (a), the raw water moving path opening / closing valve A according to another embodiment of the present invention is provided with a key groove (not shown) formed on the inner side surface of the through hole of the valve plug 23 of the valve body 19 And a key 25 formed on the outer surface of the plunger 20 so as to correspond to the key groove 24,

When the key 25 is released from the key groove 24 by pressing the plunger 20 in the axial direction, when the plunger 20 is rotated by an arbitrary angle (for example, 90 degrees) The key 25 is positioned in an area other than the key groove 24 so that the fluid transfer passage 18 can be kept open.

Although not shown in the figure, the external force source

A hinged type door that is mounted on the water purifier main body 5 so as to be opened and closed by a hinge and a sliding type door which is slidably moved along the guide rail to open and close the water purifier main body 5 may be used. Or a door that is opened and closed by fastening and dismounting a screw (not shown) to the purifier body 5 can be used.

Although not shown in the drawing, the internal pressure release from the water purifier main body 5 when the residual pressure discharge passage opening / closing valve B is opened as the door 9 is opened,

Off valve (B) for discharging the residual water to the outside of the water purifier main body (5) through a residual pressure discharge hose connected to the discharge port of the residual pressure discharge passage on-off valve (B) And can be discharged through a water receiver which can be drawn out to the inside of the main body 5.

Hereinafter, an example of the use of a water shuttle opening / closing valve provided in a water purifier according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 (a), when the upper end of the plunger 13 is pressed in the vertical direction (for example, the closing operation of the door 9 is referred to), a key formed on the outer side surface of the plunger 13 The elastic member 17 provided at the lower end of the plunger 13 is compressed by the pressing force so that the elastic member 25 is lowered by a predetermined distance along the key groove 24 formed on the inner side surface of the through- being).

The inlet 10 and the outlet 11 are communicated with each other by the communication portion 14 formed on the outer peripheral edge of the plunger 13 by the lowering of the plunger 13. [

The fluid such as raw water flowing into the valve body 12 through the inlet 10 is discharged from the valve body 12 through the discharge port 11 of the valve body 12.

In this case, when the fluid flows into the valve body 12, the O-ring 28 and the closing portion 15 (e.g., packing is used) mounted on the outer surface of the plunger 13 above the communicating portion 14, It is prevented from leaking to the outside of the valve body 12. [

2 (b), when the external force pressing the plunger 13 is removed (the opening operation of the door 9 as an example), the elastic restoring force of the elastic body 17 causes the plunger 13 13 in the upward direction in the drawing and returns to the initial position.

The inlet 10 and the outlet 11 are closed by the closing portion 15 of the plunger 13 due to returning to the initial position of the plunger 13.

At this time, the fluid from the inlet port 10 flows into the valve body 12 by the closing portion 15 of the plunger 13, or the fluid from the outlet port 11 flows back into the valve body 12 .

Hereinafter, an example of the use of a raw water flow path opening / closing valve provided in a water purifier according to another embodiment of the present invention will be described in detail with reference to the accompanying drawings.

4A, when the upper end of the plunger 20 is pressed in the vertical direction (for example, the closing operation of the door 9 is referred to), a key formed on the outer side surface of the plunger 20 The elastic member 22 provided at the lower end of the plunger 20 is compressed by the pressing force so that the elastic member 25 is lowered by a predetermined distance along the key groove 24 formed on the inner side surface of the through- being).

As the fluid transfer passage 18 is opened by the lowering of the plunger 20, the inlet port 10 and the discharge port 11 of the raw water flow path opening / closing valve A are communicated with each other.

The fluid such as the raw water flowing into the valve body 19 through the inlet 10 is discharged from the valve body 19 through the discharge port 11 of the valve body 19.

At this time, when the fluid flows into the valve body 19, it is prevented from leaking to the outside of the valve body 19 by the O-rings 29 and 30 mounted on the outer side and the lower side of the plunger 20.

4 (b), when the external force pressing the plunger 20 is removed (the opening operation of the door 9 as an example), the elastic restoring force of the elastic body 22 causes the plunger 20 20 in the upper direction in the drawing, and returns to the initial position.

As the fluid transfer passage 18 is closed by returning to the initial position of the plunger 20, the inlet port 10 and the discharge port 11 of the raw water flow path opening / closing valve A are closed.

At this time, it is possible to prevent the water from leaking from the inlet 10 to the outlet 11 by the O-ring 31 mounted on the middle side of the plunger 20.

Hereinafter, an example of using a water purifier including a valve for opening and closing the flow path of the door according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The upper end of the plunger 13 is closed by the closing of the door 9 when the door 9 which is openably and closably mounted on the water purifier main body 5 is closed as shown in Figures 2 (a) The plunger 13 of the opening / closing valve A for the raw water flow path is lowered by a predetermined distance in the vertical direction.

The inlet port 10 and the outlet port 11 of the raw water flow path opening / closing valve A are communicated with each other by the communication portion 14 of the plunger 13 by moving the plunger 13 in the vertical direction.

As a result, the raw water from the raw water supply source passes through the inlet 10 of the raw water transfer passage opening-closing valve A, the communication portion 14 of the valve body 12 and the discharge port 11 in order, .

The raw water passing through the discharge port 11 passes through the raw water transfer passage 6 and is supplied to the inlet port of the first front water filter 1 of the water filter 1-4.

At this time, the raw water introduced into the water filter (1) (referred to as a sediment filter) is filtered by a nonwoven fabric such as rust, soil, suspended solids contained in raw water, (Hereinafter referred to as UF) -water filter 4 (referred to as a post-carbon filter). The structure for filtering foreign substances harmful to the human body contained in the raw water by the water filter (1-4) is a technical content used in the related art, and therefore, detailed description thereof will be omitted.

3 (a), when the door 9 is kept closed in the water purifier body 5, the residual pressure discharge passage opening / closing valve B provided in the residual pressure discharge passage 26 And remains closed. That is, the inlet 10 and the outlet 11 are closed by the closing portion 15 (packing is used as an example) formed in the plunger 13 of the residual pressure discharge passage opening / closing valve (B).

2 (b), when the door 9 is opened to replace at least one water filter of the water filters 1, 2, 3, and 4 provided in the water purifier body 5, An external force for pressing the plunger 13 of the opening / closing valve A for the raw water movement passage is removed.

Thus, the plunger 13 of the raw water flow path opening / closing valve A is moved upward by the resilient restoring force of the elastic body 17 supporting the lower end thereof, and is returned to the initial position.

As a result, the raw water passage 6 for supplying the raw water to the first front water filter 1 out of the water filters 1, 2, 3, 4 is shut off.

3 (b), due to the opening of the door 9, the plunger 13 is moved to the initial position by the elastic restoring force of the elastic body 17, so that the residual pressure discharge passage opening / closing valve B It is switched to the open state. The residual pressure discharge passage 26 is opened as the inlet 10 and the discharge port 11 of the residual pressure discharge passage on-off valve B communicate with each other. Therefore, the residual internal pressure remaining in the water filters (1, 2, 3, 4) can be discharged through the residual pressure discharge passage opening / closing valve (B).

Therefore, after the door 9 is opened, the water purification filter of the water purification filter 1-4 can be replaced while the internal residual pressure is removed from the water purification filters 1, 2, 3, 4.

On the other hand, the door 9 of the water purifier main body 5 is opened to check whether or not water is leaked from the water filter 1-4 of the water purifier main body 5. 2 (b), when the door 9 is opened, the plunger 13 of the raw water flow path opening / closing valve A is returned to the initial position, (10) and the discharge port (11) are closed. As a result, the raw water from the raw water supply source is prevented from flowing into the water filter (1, 2, 3, 4).

At this time, although not shown in the drawing, the plunger 13 is forcibly urged in the vertical direction to communicate the inlet 10 and the discharge port 11 of the opening / closing valve A for the raw water moving passage. The key 25 formed on the outer surface of the plunger 13 is disengaged from the key groove 24 of the valve plug 23 when the plunger 13 is moved by the set distance in the vertical direction.

At this time, when the plunger 13 of the raw water flow path opening / closing valve A is rotated clockwise or counterclockwise by a predetermined angle (preferably 90 degrees) (24). ≪ / RTI >

That is, since the valve plug 23 serves as a stopper, the plunger 13 is in a state of being pressed even when the external force pressing the upper end of the plunger 13 is removed (when the door 9 is opened) . The inlet port 10 and the outlet port 11 of the opening / closing valve for the raw water flow passage A are kept open (the residual pressure discharge passage 26 is closed) (B)).

Therefore, the raw water from the raw water supply source is moved along the raw water moving passage 6 to be supplied to the water filter (1) - the water filter (2) - the water filter (3) - the water filter 4).

This makes it possible to forcibly open the raw water passage opening / closing valve A provided in the raw water moving passage 6 into which the raw water flows, with the door 9 of the water purifier body 5 being opened, Since the raw water flowing through the raw water moving passage 6 is supplied to the water filter (1-4), it is possible to easily confirm that water is leaked from the water filter (1-4).

10; Inlet
11; outlet
12; The valve body
13; plunger
14; The communication part
15; Closing part
16; Seat groove
17; Elastic body
18; Fluid passage
19; The valve body
20; plunger
21; Pausset
22; Elastic body
23; Valve plug
24; Key Home
25; Key
26; The residual pressure discharge passage
A; Opening and closing valve for raw water passage
B; Opening and closing valve for residual pressure release passage

Claims (10)

delete delete A purifier main body having a water filter for purifying foreign matters contained in raw water;
A sliding type door which is slidably moved along the guide rail to the water purifier main body or a sliding type door which is opened and closed by fastening and dismounting the screw to the water purifier main body, door;
A water pump for supplying water to the first water filter of the water filter; and a plunger that moves in the axial direction when the door is opened or closed so as to close or open the raw water moving passage An open / close valve for the raw water passage;
Pressure discharge passage for opening or closing the residual pressure discharge passage by means of a plunger which is interlocked when the door is opened or closed and is moved in an axial direction to be opened or closed in a residual pressure discharge passage connected to any one of the water filters of the water filter, A passage opening / closing valve;
And a cock or faucet for discharging the purified water purified by the water filter, wherein the water purifier includes:
The raw water movement passage opening / closing valve or the residual pressure discharge passage opening /
A valve body having an inlet and an outlet through which fluid is introduced and discharged;
A plunger which is coupled to the valve body so as to be able to move up and down; a plunger having a communication part for communicating the inlet and the outlet when the plunger is moved by a predetermined distance by pressing; and a closing part for closing the inlet and the outlet, Formed on the outer periphery;
The plunger is disposed between the lower end of the plunger and the seating groove of the valve body facing the plunger, and the plunger is moved to the initial position by an elastic restoring force to close the inlet and the outlet by the closing portion when an external force, To the elastic member,
A key groove formed in an inner side surface of the through hole of the valve plug of the valve body and a key formed on the outer surface of the plunger so as to correspond to the key groove,
When the plunger is pushed in the axial direction and the key is detached from the key groove, the key is positioned in an area excluding the key groove when the plunger is rotated by an arbitrary angle, so that the inlet and the outlet are maintained in a communicated state And a valve for opening and closing the flow path is interlocked with the opening and closing of the door. delete delete delete A purifier main body having a water filter for purifying foreign matters contained in raw water;
A sliding type door which is slidably moved along the guide rail to the water purifier main body or a sliding type door which is opened and closed by fastening and dismounting the screw to the water purifier main body, door;
A water pump for supplying water to the first water filter of the water filter; and a plunger that moves in the axial direction when the door is opened or closed so as to close or open the raw water moving passage An open / close valve for the raw water passage;
Pressure discharge passage for opening or closing the residual pressure discharge passage by means of a plunger interlocked when the door is opened or closed and moved in the axial direction to be openable or closable in a residual pressure discharge passage connected to any one of the water filters, A passage opening / closing valve;
And a cock or faucet for discharging the purified water purified by the water filter, wherein the water purifier includes:
The raw water movement passage opening / closing valve or the residual pressure discharge passage opening /
A valve body formed with an inlet and an outlet through which fluid is introduced and discharged, and a fluid transfer passage communicating with the inlet and the outlet;
A plunger which is coupled to the valve body so as to be able to move up and down; a plunger having a communication part for communicating the inlet and the outlet when the plunger is moved by a predetermined distance by pressing; and a closing part for closing the inlet and the outlet, Formed on the outer periphery;
The plunger is disposed between the lower end of the plunger and the seating groove of the valve body facing the plunger, and the plunger is moved to the initial position by an elastic restoring force so as to close the inlet and the outlet by the closing portion when an external force, To the elastic member,
A key groove formed in an inner side surface of the through hole of the valve plug of the valve body and a key formed on the outer surface of the plunger so as to correspond to the key groove,
When the plunger is pressed in the axial direction to release the key from the key groove, when the plunger is rotated by an arbitrary angle, the key is positioned in an area excluding the key groove, thereby keeping the fluid movement path open And a valve for opening and closing the flow path is interlocked with the opening and closing of the door. delete 8. The method according to claim 3 or 7,
The internal residual pressure discharge from the purifier body when the residual pressure discharge passage opening / closing valve is opened,
Pressure discharge pipe connected to the discharge port of the residual pressure discharge passage on-off valve, or the discharge port of the residual pressure discharge passage on-off valve, And a valve for opening and closing the flow path is interlocked with the opening and closing of the door. delete

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