KR102348039B1 - Washing machine - Google Patents

Abstract

The washing machine according to the present invention includes a dual check valve installed on a hose to prevent reverse flow of wash water, and the dual check valve includes: a valve body for flowing wash water into the washing machine; a first member inserted into one side of the valve body and flowing wash water in only one direction; and a second member inserted into the other side of the valve body and flowing wash water in only one direction.
The present invention can double prevent the backflow of washing water through one dual check valve, can reduce the installation time when installing the dual check valve, and has the advantage of reducing the risk of water leakage by simplifying the installation structure have.

Description

washing machine {WASHING MACHINE}

The present invention relates to a washing machine.

In general, a washing machine is a device that washes laundry using the emulsification action of detergent, the water flow action generated by the rotation of the washing tub or laundry blades, and the impact action applied by the laundry blades. Hereinafter, it is referred to as 'cloth') and proceeds with washing, rinsing, or dehydration to remove contamination.

In addition, the washing machine receives and circulates washing water to remove the contamination of the fabric.

Here, a check valve is installed in the pipe through which the wash water flows.

The check valve prevents reverse flow of wash water due to an instantaneous pressure change or reverse osmosis pressure.

In particular, the conventional washing machine installs two check valves in one pipe in case the check valve is damaged or damaged, and through this, the washing machine can operate normally even if any one of the check valves is damaged.

However, when two check valves are installed in one pipe as in the prior art, there is a problem in that the material cost is increased due to an increase in the number of parts.

In addition, since a plurality of check valves are installed, there is a problem in that the assembly time is increased and the assembly property is deteriorated.

In addition, since a plurality of check valves are installed in one pipe, there is also a problem in that the possibility that water leakage or the like may occur due to poor assembly is increased.

Republic of Korea Patent Registration 10-0373483

SUMMARY OF THE INVENTION An object of the present invention is to provide a washing machine equipped with a dual check valve for preventing backflow of washing water.

Another object of the present invention is to provide a dual check valve made of one part.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A washing machine according to an aspect of the present invention includes a dual check valve installed on a hose to prevent backflow of wash water, and the dual check valve includes: a valve body for flowing wash water into the washing machine; a first member inserted into one side of the valve body and flowing wash water in only one direction; and a second member inserted into the other side of the valve body and flowing wash water in only one direction.

The first member includes a first check valve for preventing backflow of wash water, the second member includes a second check valve for preventing backflow of wash water, the first check valve and the second check The valve part may be formed in the same direction.

The first member may include: a member body having a hollow valve formed therein so that washing water flows; a locking part formed on one side of the member body and forming mutual locking on one side of the valve body; It may include; it is composed of two plates protruding to the other side of the member body, the end is formed in close contact with the first check valve for performing a check valve function for the wash water; may include.

The second member may include: a member body having a hollow valve formed therein so that washing water flows; a locking part formed on the other side of the member body and forming a mutual engagement on the other side of the valve body; The second plate is composed of two plates protruding inside the member body, the ends are formed in close contact with each other, are formed in the same direction as the first check valve part, and perform a check valve function for the wash water. It may include a check valve unit.

It may include a first fixing member inserted into the first member to fix the first member in close contact with the valve body.

It may include a second fixing member inserted into the second member to fix the second member in close contact with the valve body.

A washing machine according to another aspect of the present invention includes: a cabinet forming an exterior; a tub for accommodating wash water; a drum disposed in the tub and rotated by accommodating the cloth therein; a water supply unit that receives wash water from an external water source and supplies it to the tub; a spray nozzle for spraying the wash water supplied from the water supply unit into the drum; a hose connecting the water supply unit and the spray nozzle to guide washing water; It includes; a dual check valve installed on the hose and double suppressing the reverse flow of the wash water.

The dual check valve includes a valve body for flowing wash water therein; a first member inserted into one side of the valve body and flowing wash water in only one direction; a second member inserted into the other side of the valve body and flowing wash water in only one direction; a first fixing member inserted into the first member to fix the first member in close contact with the valve body; and a second fixing member inserted into the second member to fix the second member in close contact with the valve body.

The first member may include: a member body having a hollow valve formed therein so that washing water flows; a locking part formed on one side of the member body and forming mutual locking on one side of the valve body; It may include; it is composed of two plates protruding to the other side of the member body, the end is formed in close contact with the first check valve for performing a check valve function for the wash water; may include.

The second member may include a member body having a hollow valve formed therein so that washing water flows; a locking part formed on the other side of the member body and forming mutual locking on the other side of the valve body; The second plate is composed of two plates protruding inside the member body, the ends are formed in close contact with each other, are formed in the same direction as the first check valve part, and perform a check valve function for the wash water. It may include a check valve unit.

According to the washing machine and its control method of the present invention, there are one or more of the following effects.

First, the present invention has the advantage of being able to double prevent the reverse flow of washing water through one dual check valve.

Second, the present invention has the advantage of reducing the risk of water leakage by reducing the installation time and simplifying the installation structure when installing the dual check valve in the hose.

Third, the present invention has the advantage of reducing the installation cost because only one dual check valve is installed in order to double prevent the reverse flow of washing water.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing a washing machine according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating an internal structure of the washing machine shown in FIG. 1 .
3 is a partial cross-sectional view of the washing machine shown in FIG. 1 .
4 is a front view illustrating an internal structure of the washing machine shown in FIG. 1 .
5 is a perspective view of the dual check valve shown in FIG.
6 is an exploded perspective view of the dual check valve shown in FIG.
7 is a cross-sectional view of the dual check valve shown in FIG.
8 is a front view of a dual check valve according to a second embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining a washing machine and a method for controlling the same according to embodiments of the present invention.

1 is a perspective view showing a washing machine according to an embodiment of the present invention, FIG. 2 is a perspective view showing an internal structure of the washing machine shown in FIG. 1, and FIG. 3 is a partial cross-sectional view of the washing machine shown in FIG. , and FIG. 4 is a front view showing the internal structure of the washing machine shown in FIG. 1 .

The washing machine 100 according to an embodiment of the present invention includes a cabinet 111 forming an exterior, a tub 122 for accommodating washing water, and a drum ( 124); A spray nozzle 151 for spraying into the drum 124, a detergent box 133 that accommodates laundry detergent and mixes washing water with laundry detergent, and drains the wash water in the tub and supplies it back into the tub. It includes a pump 136 for circulating the wash water, and a circulation nozzle 139 for spraying the wash water circulated by the pump 136 into the drum.

The cabinet 111 forms the exterior of the washing machine 100 . A tub 122 is provided inside the cabinet 111 . The cabinet 111 is formed with a cloth entry hole 117 to allow entry and exit of the cloth. A door 112 is rotatably provided on the front side of the cabinet 111 to enable opening and closing of the port access hole 117 . The cabinet 111 is provided with a control panel 114 that receives commands from the user and displays various status information of the washing machine 100 . The cabinet 111 is provided with a detergent box 133 in which detergents such as laundry detergent, rinsing detergent or bleach are accommodated so as to be withdrawn.

The tub 122 is buffered by the spring unit 170 and the damper 160 installed inside the cabinet 111 . The tub 122 accommodates washing water. A drum 124 is disposed inside the tub 122 .

The tub 122 may be provided with a water level sensor 121 for detecting the level of the wash water accommodated in the tub. The water level sensor 121 may be implemented in various ways, and in this embodiment, the distance between the electrodes is changed using the air pressure that changes according to the wash water level, and the water level is measured by the amount of capacitance change of the electrodes. A heater 143 for heating the wash water may be provided inside the tub 122 .

The drum 124 rotates while receiving the cloth. The drum 124 has a plurality of through-holes 124b through which the wash water passes. A lifter 124a may be disposed on the inner wall of the drum 124 to lift the fabric to a predetermined height when the drum 124 rotates. The drum 124 rotates by receiving rotational force by the driving unit 113 .

The drum 124 is not arranged completely horizontally, but may be arranged to have a predetermined inclination so that the rear portion of the drum 124 comes down below the horizontal.

The gasket 128 is provided between the tub 122 and the cabinet 111 to seal the tub 122 and the cabinet 111 . The gasket 128 is disposed between the inlet of the tub 122 and the fore access hole 117 . The gasket 128 mitigates the impact transmitted to the door 112 when the drum 124 rotates, and at the same time prevents the washing water in the tub 122 from leaking to the outside.

Although the gasket 128 may be integrally formed of one material, a portion coupled to the tub 122 is formed of a hard material in order to secure coupling strength with the tub 122 and sufficient rigidity. A portion coupled to the cabinet 111 may be formed of a material having elasticity in order to reduce vibration transmitted from the tub 122 to the cabinet 111 .

The gasket 128 is provided with a spray nozzle 151 and a circulation nozzle 139 for introducing wash water into the drum 124 , and a steam nozzle 152 for spraying steam into the drum 124 .

The driving unit 113 rotates the drum 124 . The driving unit 113 may rotate the drum 124 at various rotational speeds or directions. The driving unit 113 may include a motor, a switching element controlling the same, a clutch, and the like. The driving unit 113 may include a sensor for measuring the actual rotation speed of the drum 124 .

The detergent box 133 accommodates detergents such as laundry detergent, rinsing detergent or bleach. It is preferable that the detergent box 133 is provided on the front side of the cabinet 111 to be withdrawn. The detergent in the detergent box 133 is mixed with the washing water when the washing water is supplied and introduced into the tub 122 . The detergent box 133 may be formed by dividing a portion in which the laundry detergent is accommodated, a portion in which the rinse detergent is accommodated, and a portion in which the bleach is accommodated.

The washing machine 100 is connected through a hot water source (HW) supplying hot water from an external water source and a hot water hose (115a), and connected through a cold water source (CW) supplying cold water from an external water source and a cold water hose (115b). . The water introduced through the hot water hose 115a and the cold water hose 115b is supplied to the detergent box 133, the steam unit 145 and/or the spray nozzle 151 through the appropriate control of the water supply unit 132 .

Inside the cabinet 111, a water supply unit 132 connected to a hot water hose 115a and a cold water hose 115b to control the inflow of washing water from an external water source, and a water supply unit 132 connected to the water supply unit 132 ), the first water supply hose 131a and the second water supply hose 131b for guiding the washing water supplied from the cold water source (CW) to the detergent box 133 according to the operation of the water supply unit 132, A third water supply hose 131c is provided for guiding the washing water supplied from the cold water source CW to the spray nozzle 151 and the detergent box 133 according to the operation of the unit 132 . The third water supply hose 131c is branched from the water supply unit 132 and is connected to the spray nozzle 151 and the detergent box 133, respectively.

In addition, a fourth water supply hose ( 131d), and a fifth water supply lake 131e that is connected to the water supply unit 132 and guides the high-temperature washing water supplied from the hot water source HW to the detergent box 133 according to the operation of the water supply unit 132. provided

It is preferable that a water supply pipe 134 through which washing water mixed with detergent in the detergent box 133 flows into the tub 122 is provided inside the cabinet 111 .

The water supply unit 132 includes a pre-valve 132a connected to the first water supply hose 131a, a main valve 132b connected to the second water supply hose 131b, and a bleach valve connected to the third water supply hose 131c. 132c, a steam valve 132d connected to the fourth water supply hose 131d, and a hot water valve 132e connected to the fifth water supply hose 131e to control the inflow of hot wash water.

When the free valve 132a is opened, the washing water is supplied to the detergent box 133 through the first water supply hose 131a. The washing water supplied by the pre-valve 132a passes through the portion in which the detergent is accommodated in the detergent box 133 , is mixed with the detergent for pre-washing, and then is supplied into the tub 122 through the water supply pipe 134 . When there is no pre-washing detergent, the wash water supplied by the pre-valve 132a is supplied into the tub 122 through the water supply pipe 134 without being mixed with the pre-washing detergent.

When the main valve 132b is opened, the washing water is supplied to the detergent box 133 through the second water supply hose 131b. Wash water supplied by the main valve 132b passes through a portion in which the detergent is accommodated in the detergent box 133 , is mixed with the laundry detergent, and then is supplied into the tub 122 through the water supply pipe 134 .

When the bleach valve 132c is opened, the washing water is supplied to the spray nozzle 151 and the detergent box 133 through the third water supply hose 131c. A portion of the wash water supplied by the bleach valve 132c is injected into the drum 124 through the injection nozzle 151 . Another portion of the wash water supplied by the bleach valve 132c is mixed with the bleach in the detergent box 133 and supplied into the tub 122 through the water supply pipe 134 . When there is no bleach, the wash water supplied by the bleach valve 132c is supplied into the tub 122 through the water supply pipe 134 without being mixed with the bleach.

When the steam valve 132d is opened, the washing water is supplied to the steam unit 145 through the fourth water supply hose 131d. Wash water supplied by the steam valve 132d is heated in the steam unit 145 and converted into steam. Steam generated from the steam unit 145 is supplied to the steam nozzle 152 through the steam hose 146 and is sprayed into the drum 124 through the steam nozzle 152 .

When the hot water valve 132e is opened, high temperature washing water is supplied to the detergent box 133 through the fifth water supply hose 131e. Wash water supplied by the hot water valve 132e passes through the detergent box 133 and is supplied into the tub 122 through the water supply pipe 134 .

Inside the cabinet 111 , a drain pipe 135 through which the wash water in the tub 122 flows out, a pump 136 through which the wash water in the tub 122 flows out, and a circulation nozzle so that the wash water circulates and sprays into the drum 124 . A circulation hose 137 connected to the 139 and a drain hose 138 through which the wash water is drained to the outside are provided.

The pump 136 drains the wash water in the tub 122 .

Wash water moved to the pump 136 through the drain pipe 135 is drained to the outside through the drain hose 138 or circulated into the tub 122 through the circulation hose 137 . According to an embodiment, the pump 136 is provided as a circulation pump and a drain pump, and may be connected to the circulation hose 137 and the drain hose 138, respectively.

The circulation hose 137 connects the pump 136 and the circulation nozzle 139 . Wash water discharged from the tub 122 by the pump 136 is injected into the drum 124 from the circulation nozzle 139 through the circulation hose 137 .

The control panel 114 includes an input unit 114b for receiving various operation commands such as selection of a washing course or operation time and reservation for each cycle through the user, and a display unit 114a for displaying the operating state of the washing machine 100 . can be provided.

Laundry courses include lingerie/wool course, boiling course, speed wash course, functional clothing course, fabric damage prevention course, quiet and quiet course, and energy saving course in addition to the standard course depending on the type and function of the fabric. The operation of the washing machine 100 is divided into a washing cycle, a rinsing cycle, and a spin-drying cycle, and a water supply step, a washing step, a rinsing step, a draining step, a spin-drying step, or a drying step are performed within each cycle.

The spray nozzle 151 is provided on the gasket 128 to spray wash water into the drum 124 . The jet nozzle 151 is disposed adjacent to the steam nozzle 127 . The injection nozzle 151 is connected to the first water supply lake 131a to inject wash water supplied from an external water source into the drum 124 .

The injection nozzle 151 is preferably provided on the upper portion of the gasket 128 , and according to an embodiment, the injection nozzle 151 is located below the gasket 128 or between the gasket 128 and the cabinet 111 , the cabinet 111 . ), the tub 122, etc. may be disposed in various positions.

The spray nozzle 151 is preferably an atomizing nozzle that refines washing water and sprays it on the side and rear surfaces of the drum 124 .

The steam nozzle 152 is provided on the gasket 128 to inject steam into the drum 124 . The steam nozzle 152 is connected to the steam hose 146 to spray the steam generated by the steam unit 145 into the drum 124 .

The steam nozzle 152 is provided adjacent to the injection nozzle 151 on the upper portion of the gasket 128 . According to an exemplary embodiment, the steam nozzle 152 may be disposed under the gasket 128 , between the gasket 128 and the cabinet 111 , the cabinet 111 , the tub 122 , and the like.

The circulation nozzle 139 is provided on the gasket 128 to inject wash water circulated by the pump 136 into the drum 124 . The circulation nozzle 139 is connected to the circulation hose 137 to spray the wash water circulated by the pump 136 into the drum 124 . The circulation nozzle 139 may be integrally formed with the gasket 128 .

It is preferable that the circulation nozzle 139 is provided below the rotation shaft of the drum 124 to spray the wash water upward. A plurality of circulation nozzles 139 may be provided so that two circulation nozzles may be provided on both lower sides of the gasket 128 . The first circulation nozzle 139a is provided on the lower left side of the gasket 128 to spray wash water upward and rightward toward the inside of the drum 124 , and the second circulation nozzle 139b is provided on the right side of the gasket 128 . It is preferably provided in the lower portion to spray the washing water toward the inside of the drum 124 in the upper left direction.

When the circulation nozzle 139 is provided in plurality, the circulation hose 137 is provided in plurality so that the first circulation hose 137a is connected to the first circulation nozzle 139a, and the second circulation hose 137b is the second It is preferable to be connected to the circulation nozzle (139b).

The wash water accommodated in the drum 124 moves to the pump 136 along the drain pipe 135 provided in the tub 122 . The pump 136 allows the wash water to reach the circulation nozzle 139 through the circulation hose 137 . Wash water is injected into the drum 124 through the circulation nozzle 139 and introduced into the tub 122 .

5 is a perspective view of the dual check valve shown in FIG. 2 , FIG. 6 is an exploded perspective view of the dual check valve shown in FIG. 5 , and FIG. 7 is a cross-sectional view of the dual check valve shown in FIG. 2 .

The dual check valve 200 of this embodiment is installed in the third water supply hose (131c).

The third water supply hose 131c is a hose that supplies washing water to the spray nozzle 151 .

Unlike this embodiment, the dual check valve 200 may be installed in another hose through which the wash water flows.

The dual check valve 200 includes a valve body 250 for flowing wash water therein, a first member 210 inserted into one side of the valve body 250 and flowing wash water in only one direction, The second member 220 is inserted into the other side of the valve body 250, the wash water flows in only one direction, is inserted into the first member 210, and the first member 210 is connected to the valve. A first fixing member 230 for fixing in close contact with the body 250, and a first fixing member 230 inserted into the second member 220 and fixing the second member 220 in close contact with the valve body 250 2 includes a fixing member 240 .

The valve body 250 includes a hollow valve body 251 formed therein and through which wash water flows, and a valve body rim 252 formed to protrude outward.

In this embodiment, the valve body 250 is formed in a cylindrical shape.

In this embodiment, the valve body 250 is formed in a straight shape, but unlike this embodiment, it may be formed in an elbow shape of "a" or "b".

In addition, it is formed in a "Y" shape, three members may be installed.

The first member 210 includes a member body 212 having a hollow valve 211 formed therein so that washing water flows therein, and is formed outside the member body 212 and is in close contact with the inner surface of the valve body 250 . A friction part 214 to form a frictional force, a locking part 216 formed on one side of the member body 212 and forming a mutual engagement on one side of the valve body 250, and the member body 212 ) is formed on the other side, is inserted into the valve body 250, and includes a first check valve unit 218 that functions as a check valve for flowing wash water.

The member body 212 is formed in a cylindrical shape.

The friction part 214 is formed in a ring shape on the member body 212 .

The engaging part 216 is formed to have a larger diameter than the member body 212 and is caught on one side of the valve body 250 .

The first check valve part 218 is formed by sharply adhering two plate ends extending from the body member 212 .

In this embodiment, the end of the first check valve part 218 is located outside the member body 212 .

The second member 220 is formed similarly to the first member 210 .

Therefore, the second member 220 has the same shape as the first member 210 in the member body 222 , the friction part 224 , and the locking part 226 .

However, only the shape of the second check valve unit 228 is different from that of the first check valve unit 218 .

The second check valve part 228 is bent at the member body 222 so that an end thereof is located inside the member body 222 .

That is, the end of the second check valve part 228 is formed to face the engaging part 226 side.

Therefore, the first check valve portion 218 and the second check valve portion 228 are disposed so that their ends face in the same direction.

In addition, the first fixing member 230 and the second fixing member 240 are formed in the same manner, and in this embodiment are formed in a cylindrical shape.

The first fixing member 230 or the second fixing member 240 is inserted into the first member 210 or the second member 220, and each member 210, 220 is connected to the valve body 250. adhere to the

On the other hand, the third water supply hose (131c) is fitted to the outer periphery of the valve body (250).

And a clamp 260 is fastened to the third water supply hose 131c to fix the third water supply hose 131c to the valve body 250 .

Referring to FIG. 7 , the first member 210 is fitted from one side of the valve body 250 , and the second member 220 is fitted from the other side of the valve body 250 .

When the assembly of the first member 210 and the second member 220 is completed, an interspace 201 is formed between the first member 210 and the second member 220 .

In this embodiment, wash water may flow from the first member 210 to the second member 220 , and flow in the opposite direction by the first check valve unit 218 and the second check valve unit 228 . this is suppressed

When the flow is formed in the opposite direction, the two plates are in close contact with each other to block the flow of wash water.

8 is a front view of a dual check valve according to a second embodiment of the present invention.

In the dual check valve 300 according to this embodiment, a Y-shaped valve body 350 is disposed, and at least one of the first member 210 or the second member 220 is disposed at each end of the valve body 350 . which one is installed

In this embodiment, wash water is supplied through two first members 210 and the wash water is discharged through one second member 220 .

Unlike the present embodiment, the washing water may be supplied through one first member 210 and configured to be discharged through the two second members 220 .

Unlike this embodiment, the valve body 350 may be formed in a T-shape.

The dual check valve according to the present embodiment can prevent double wash water from flowing backward in a structure in which wash water is branched or laminated.

Hereinafter, since the rest of the configuration is the same as that of the first embodiment, a detailed description thereof will be omitted.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. should be interpreted

113: driving unit 114: control panel
122: tub 124: drum
128: gasket 132: water supply unit
132a: pre-valve 132b: main valve
132c: bleach valve 132d: steam valve
132e: hot water valve 133: detergent box
136: pump 137: circulation hose
138: drain hose 139: circulation nozzle
141: control unit 151: spray nozzle
200: dual check valve 210: first member
211: hollow valve 212: member body
214: friction part 216: engaging part
218: first check valve 220: second member
211: hollow valve 212: member body
214: friction part 216: engaging part
218: first check valve unit 230: first fixing member
240: second fixing member 250: valve body

Claims (10)

In the washing machine comprising a hose through which washing water flows,
It includes a dual check valve installed on the hose to prevent reverse flow of washing water,
The dual check valve is:
a valve body in which wash water is introduced to one side and wash water is discharged to the other side;
a first member having one side disposed on one side of the valve body, the washing water flowing in, and the other side extending inside the valve body to prevent reverse flow of the washing water; and
A second member having one side disposed on the other side of the valve body to discharge washing water, and the other side extending inside the valve body to prevent reverse flow of washing water;
The first member is provided with a first check valve unit for preventing the reverse flow of washing water on the other side,
The second member is a washing machine having a second check valve for preventing reverse flow of wash water on the other side. delete The method according to claim 1,
the first member
a member body having a first hollow valve communicating with the inside and outside formed on one side of the first member;
a locking part protruding from one side of the first member and caught on one side of the valve body; and
and a first friction part protruding from the outer surface of the member body and in close contact with the inner surface of the valve body to form a friction force;
The first check valve unit is formed by sharply contacting the ends of two plates extending from the member body of the first member. 4. The method according to claim 3,
the second member
a member body having a second hollow valve communicating the inside and the outside formed on one side of the second member;
a locking part protruding from one side of the second member and caught on the other side of the valve body;
and a second friction part protruding from the outer surface of the member body and in close contact with the inner surface of the valve body to form a friction force,
The second check valve part is bent at the member body of the second member so that the end is located inside the member body of the second member,
The end of the second check valve part is formed to face the engaging part of the second member. 4. The method according to claim 3,
and a first fixing member which is inserted into the first member through the first hollow of the valve and attaches the first member to the valve body. 5. The method according to claim 4,
and a second fixing member inserted into the second member through the second valve hollow and configured to attach the second member to the valve body. delete delete delete delete

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