WO2024085490A1

WO2024085490A1 - Washing water discharge device of toilet-integrated bidet

Info

Publication number: WO2024085490A1
Application number: PCT/KR2023/014620
Authority: WO
Inventors: 임영균
Original assignee: 임영균
Priority date: 2022-10-18
Filing date: 2023-09-25
Publication date: 2024-04-25
Also published as: KR102593261B1

Abstract

The present invention relates to a washing water discharge device of a toilet-integrated bidet, wherein the production cost is reduced and the volume is minimized by omitting solenoid valves that actuate opening and closing parts provided on both sides of a discharge part. Also, a flush valve and a check valve are coupled to and integrated with the front side of the discharge part, and thus external interference factors are eliminated such that the durability of the product is improved. In addition, a discharge passage can constantly be maintained in a sturdy state, and thus the reliability of the product is improved.

Description

Washing water discharge device for pottery-integrated bidet

The present invention relates to a washing water discharge device for an appliance-integrated bidet. More specifically, the construction of the solenoid valve that operates the opening and closing portions provided on both sides of the discharge portion is omitted to reduce cost and minimize volume, and a flush valve and a flush valve are installed in front of the discharge portion. This relates to a washing water discharge device for an appliance-integrated bidet that combines and integrates check valves to eliminate external interference factors and maintain the discharge passage in a solid state at all times.

In general, a bidet is mounted on a pottery and, after toileting, cleans the toilet's anus or the woman's local area with cleansing water sprayed from a nozzle without using toilet paper. Then, the remaining moisture around the anus or local area is dried in a dryer. It is a device that dries with supplied warm air, and as interest in hygiene has increased, it has been widely used by people of all ages and genders in recent years.

The bidet is equipped with a discharge device for discharging the washing water into the pottery, and the discharge device supplies the washing water supplied from the faucet to the rim side and the jet waterway.

However, in the discharge device, the diaphragm opens slowly when the wash water is discharged to the rim side and the jet channel, so not only does the wash water not discharge quickly, but the operation is not smooth, which may cause mechanical malfunction.

In order to solve the above problems, the present applicant has applied for and received registration for ‘pottery integrated washing water discharge device’ under Korean Utility Model No. 20-0463115.

The pre-registered design is a washing water discharge device that cleans toilets by discharging the washing water supplied from the faucet to the rim side of the pottery and the jet waterway side, and discharges the washing water supplied from the faucet to the rim side discharge pipe and the jet waterway side discharge pipe, respectively. A discharge part is formed, and an opening and closing part is installed on each of the rim side and the jet waterway side of the discharge part to open and close the discharge part under the control of the control unit. When washing water is supplied to the opening and closing part, the washing water stored in the rim side pressure chamber is divided into a jet. The washing water discharged through the waterway side discharge pipe and stored in the jet waterway side pressure chamber is discharged alternately through the rim side discharge pipe, and includes a pressure release unit that quickly releases the pressure in the rim side and jet waterway side pressure chambers.

However, the pre-registered design had a problem in that the manufacturing cost increased and the volume increased because a solenoid valve was installed to operate the opening/closing unit.

In addition, in order to discharge the washing water remaining in the rim side pressure chamber and the jet waterway side pressure chamber, the rim side discharge pipe and the jet waterway side discharge pipe are connected in a cross manner to the outside of the discharge part, which not only reduces durability but also causes poor connection due to external interference. There was a possible problem.

The present invention was created to solve the above problems, and the purpose of the present invention is to discharge washing water from a bidet integrated with a pottery to reduce costs and minimize volume by omitting the configuration of a solenoid valve that operates the opening and closing units provided on both sides of the discharge part. The purpose is to provide a device.

In addition, another object of the present invention is to integrate the flush valve and the check valve in front of the discharge part, thereby improving the durability of the product by eliminating external interference factors and improving the reliability of the product by maintaining the discharge passage in a solid state. To provide a washing water discharge device for an integrated bidet.

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

In order to solve the above problem, the washing water discharge device of the toilet bowl-integrated bidet of the present invention discharges the washing water supplied from the faucet into the rim side discharge pipe and the jet waterway side discharge pipe, respectively, and is installed on the rim side and the jet waterway side of the discharge section, respectively. A washing water discharge device that opens and closes the discharge section by the operation of the opening and closing section, which is installed in front of the discharge section and checks the remaining water in the rim side pressure chamber and the jet water channel side pressure chamber of the opening and closing section when washing water is supplied to the opening and closing section. A flush valve that releases the pressure in the rim-side pressure chamber and the jet channel-side pressure chamber by discharging the pressure into the rim-side discharge pipe and the jet channel-side discharge pipe through the valve; a motor drive unit installed below the flush valve to selectively open and close the rim side release unit and the jet channel side release unit by driving a stepping motor; It includes a check valve that discharges residual water discharged from the flush valve into a rim side discharge pipe or a jet channel side discharge pipe.

The flush valve includes a flush body fixed to the front of the discharge portion; a rim side release unit provided on one side of the flush body to release pressure by discharging residual water in the rim side pressure chamber; It includes a jet channel side release unit provided on the other side of the flush body to release pressure by discharging residual water in the jet channel side pressure chamber.

The rim side release portion includes a rim side discharge space formed on one side of the flush body; An opening and closing port coupled to the rim side discharge space to selectively communicate with the rim side discharge space and the operating hole; A support coupled to one side of the opening and closing opening; an operating rod coupled to the other side of the opening and closing opening, the end of which is exposed to the operating hole; A coupling end formed in the opening and closing portion and coupled to the rim side discharge space; A spring is provided between the opening and closing opening and the coupling end to provide elasticity to the opening and closing opening.

The jet channel side release portion includes a jet channel side discharge space formed on the other side of the flush body; An opening and closing port coupled to the jet waterway side discharge space to selectively communicate with the jet waterway side discharge space and the operating hole; A support coupled to one side of the opening and closing opening; An operating rod coupled to the other side of the opening and closing opening and having an end exposed to the operating hole; A coupling end formed in the opening and closing portion and coupled to the discharge space on the jet channel side; A spring is provided between the opening and closing opening and the coupling end to provide elasticity to the opening and closing opening.

The motor driving unit includes a stepping motor coupled to and fixed to the inside of the flush body from the lower part of the flush valve; a valve cam coupled to the shaft of the stepping motor and rotating eccentrically within the operating hole to selectively pressurize the operating rod of the flush valve; A cap is provided that is fixed to the top of the flush body and closes the operating hole.

The check valve is coupled to the rear of the flush valve, and has a through hole in communication with the operating hole at the center, a rim side drain hole in communication with the rim side discharge pipe at one end, and a jet in communication with the jet channel side discharge pipe at the other end. A valve pipe in which a waterway-side drainage hole is formed; A rim-side opening and closing rod coupled to the rim-side drain hole; A jet channel-side opening and closing rod coupled to the jet channel-side drain hole; a rim side discharge hole formed on the rim side of the discharge portion through which residual water discharged through the jet channel side release portion of the flush valve is discharged into the rim side discharge pipe; A jet channel side discharge hole is formed on the jet channel side of the discharge unit through which residual water discharged through the rim side release part of the flush valve is discharged into the jet channel side discharge pipe.

It is formed radially on the inner wall of the valve pipe where the rim side drain hole and the jet waterway side drain hole and the rim side discharge hole and the jet waterway side discharge hole meet, so that the rim side drain hole and the jet waterway side drain hole communicate even when the rim side opening and closing rod and the jet waterway side opening and closing rod slide. A rib that allows residual water to be discharged is further provided.

In the check valve, when residual water from the rim side pressure chamber flows into the through hole through the flush valve, the rim side opening and closing rod closes the through hole by the pressure of the washing water discharged to the rim side, and the jet waterway side opening and closing rod closes the through hole with the remaining water flowing into the through hole. The through hole is opened by the water pressure and the remaining water is discharged through the drain hole on the jet waterway side. When the remaining water in the pressure chamber on the jet waterway side flows into the hole through the flush valve, the jet waterway side opening and closing rod is used to control the washing water discharged to the jet waterway side. The through hole is closed by pressure, and the rim side opening and closing rod opens the through hole by the water pressure of the remaining water flowing into the through hole, and the remaining water is discharged through the rim side drain hole.

According to the present invention, there is an effect of reducing cost and minimizing volume by omitting the configuration of solenoid valves that operate the opening and closing units provided on both sides of the discharge part.

In addition, according to the present invention, the flush valve and the check valve are combined and integrated at the front of the discharge part, thereby eliminating external interference factors, improving the durability of the product, and improving the reliability of the product because the discharge passage can always be maintained in a solid state. There is.

Figure 1 is a perspective view of a washing water discharge device for a pottery-integrated bidet according to the present invention.

Figure 2 is an exploded perspective view of the washing water discharge device of the pottery-integrated bidet according to the present invention.

Figure 3 is an enlarged view of a state in which ribs are formed in the rim side discharge hole and the jet channel side discharge hole of the check valve according to the present invention.

Figure 4 is a plan cross-sectional view of the washing water discharge device of the pottery-integrated bidet according to the present invention.

Figure 5 is a front cross-sectional view of the washing water discharge device of the pottery-integrated bidet according to the present invention.

6 to 7 are diagrams showing a state in which the rim side discharge pipe of the present invention is opened.

Figures 8 and 9 are diagrams showing a state in which the jet channel side discharge pipe of the present invention is opened.

Hereinafter, various embodiments will be described in more detail with reference to the attached drawings. The embodiments described herein may be modified in various ways. Specific embodiments may be depicted in the drawings and described in detail in the detailed description. However, the specific embodiments disclosed in the attached drawings are only intended to facilitate understanding of the various embodiments. Therefore, the technical idea is not limited to the specific embodiments disclosed in the attached drawings, and it should be understood that all equivalents or substitutes included in the spirit and technical scope of the invention are included.

The washing water discharge device of the pottery-integrated bidet of the present invention discharges the washing water supplied from the faucet to the rim side discharge pipe 11 and the jet waterway side discharge pipe 12 of the discharge part 10, respectively, and the rim side of the discharge part 10 It is a washing water discharge device that opens and closes the discharge part (10) by the operation of the opening and closing part (20) respectively mounted on the side of the jet water channel. It is installed in front of the discharge part (10) and discharges washing water through the opening and closing part (20). When supplied, the residual water remaining in the rim side pressure chamber 22 and the jet waterway side pressure chamber 22' of the opening and closing part 20 is discharged through the rim side discharge pipe 11 and the jet waterway side discharge pipe ( 12) a flush valve 100 that releases the pressure in the rim side pressure chamber 22 and the jet channel side pressure chamber 22'; A motor drive unit 200 installed below the flush valve 100 to selectively open and close the rim side release unit 120 and the jet channel side release unit 130 by driving a stepping motor 210; It includes a check valve 300 that discharges residual water discharged from the flush valve 100 into the rim side discharge pipe 11 or the jet channel side discharge pipe 12.

The flush valve 100 is provided with a flush body 110 fixed to the front of the discharge part 10, and is provided on one side of the flush body 110 to discharge residual water from the rim side pressure chamber 22. A rim side release unit 120 is provided to release the pressure, and a jet channel side release unit 130 is provided on the other side of the flush body 110 to release the pressure by discharging residual water in the jet channel side pressure chamber 22'. ) is provided.

In addition, the rim side release unit 120 is provided with a rim side discharge space 121 formed on one side of the flush body 110, and is coupled to the rim side discharge space 121 to operate with the rim side discharge space 121. An opening 122 for selectively communicating with the ball 111 is provided, and a support 123 is coupled to one side of the opening 122, and is coupled to the other side of the opening 122, so that the end portion is an operating hole ( An operating rod 124 exposed to 111 is provided, and a coupling end 125 is formed in the opening and closing portion 20 and coupled to the rim side discharge space 121, and the opening and closing opening 122 and the coupling end 125 are provided. ) is provided with a spring 126 that is mounted between the openings and closings 122 to provide elasticity to the openings and closings 122, and is formed to communicate from the rim side pressure chamber 22 of the openings and closings 20 to the rim side discharge space 121 ( 127) is provided.

The jet channel side release part 130 is provided with a jet channel side discharge space 131 formed on the other side of the flush body 110, and is coupled to the jet channel side discharge space 131 to discharge the jet channel side. An opening 132 is provided to selectively communicate with the space 131 and the operating hole 111, and a support 133 is coupled to one side of the opening 132, and is coupled to the other side of the opening 132. An operating rod 134 whose end is exposed to the operating hole 111 is provided.

A coupling end 135 is formed in the opening/closing part 20 and coupled to the discharge space 131 on the jet channel side, and is mounted between the opening/closing port 132 and the coupling end 135 to provide elasticity to the opening/closing port 132. A spring 136 is provided, and a rim side discharge passage 137 is provided so as to communicate from the jet channel side pressure chamber 22' of the opening/closing unit 20 to the jet channel side discharge space 131.

In addition, the motor drive unit 200 is provided with a stepping motor 210 that is coupled and fixed to the inside of the flush body 110 at the lower part of the flush valve 100, and is coupled to the axis of the stepping motor 210. A valve cam 220 is provided that rotates eccentrically within the operating hole 111 and selectively pressurizes the operating

rods

124 and 134 of the flush valve 100, and is fixed to the upper part of the flush body 110. A cap 230 is provided to close the operating hole 111.

Meanwhile, the check valve 300 is coupled to the rear of the flush valve 100, and has a through hole 311 in communication with the operating hole 111 in the central part, and a hole 311 in communication with the rim side discharge pipe 11 at one end. A rim side drain hole 312 is formed, and the other end is provided with a valve pipe 310 in which a jet channel side drain hole 313 communicating with the jet channel side discharge pipe 12 is formed, and is coupled to the rim side drain hole 312. A rim side opening and closing rod 320 is provided, and a jet channel side opening and closing rod 330 is coupled to the jet channel side drain hole 313, and is formed on the rim side of the discharge part 10 to connect the flush valve 100. A rim side discharge hole 340 is provided through which residual water discharged through the jet channel side release unit 130 is discharged to the rim side discharge pipe 11, and is formed on the jet channel side of the discharge unit 10 to provide a flush valve 100. A jet channel side discharge hole 350 is provided through which residual water discharged through the rim side release portion 120 is discharged to the jet channel side discharge pipe 12.

Here, the rim side drain hole 312 and the jet channel side drain hole 313 are formed radially on the inner wall of the valve pipe 310 where the rim side discharge hole 340 and the jet channel side discharge hole 350 meet, forming a rim side opening and closing rod ( 320) and a rib 360 that communicates the rim side drain hole 312 and the jet channel side drain hole 313 so that residual water is discharged may be further provided even when the jet waterway side opening and closing rod 330 slides.

The check valve 300 is configured to open the rim side opening/closing rod 320 by the pressure of the washing water discharged to the rim side when the remaining water in the rim side pressure chamber 22 flows into the through hole 311 through the flush valve 100. (311) is closed, and the jet channel side opening and closing rod 330 opens the through hole 311 by the water pressure of the residual water flowing into the through hole 311, and the remaining water is discharged through the jet channel side drain hole 313, When the remaining water in the jet waterway side pressure chamber 22' flows into the through hole 311 through the flush valve 100, the jet waterway side opening and closing rod 330 opens through the through hole 311 by the pressure of the washing water discharged to the jet waterway side. is closed, and the rim side opening and closing rod 320 opens the through hole 311 by the water pressure of the remaining water flowing into the through hole 311, and the remaining water is discharged through the rim side drain hole 312.

That is, since the flush valve 100 and check valve 300 of the present invention are fixed and integrated in front of the discharge part 10, the durability of the product is improved compared to existing washing water discharge devices, and the discharge passage is always kept in a solid state. Since it can be maintained, leakage can be prevented and residual water can be discharged smoothly, increasing the reliability of the product.

The operating process of the present invention configured as described above will be described as follows.

As shown in Figures 6 and 7, when the toilet person leaves the bidet after sitting on the bidet seat and using the toilet, the control unit applies power to the motor driving unit 200 to release the rim side release unit 120 of the flush valve 100. ) and the jet channel side release unit 130 are sequentially opened, thereby releasing the pressure in the rim side pressure chamber 22 and the jet channel side pressure chamber 22'.

First, when the stepping motor 210 rotates counterclockwise under the control of the control unit to operate the rim side release unit 120, the valve cam 220 rotates eccentrically to press the end of the operating rod 124. do.

The opening/closing port 122 coupled to the operating rod 124 presses the spring 126 to open the rim side discharge space 121 and the operating hole 111.

At this time, the diaphragm 21 on the rim side, which was closing the rim side discharge pipe 11, opens the rim side discharge pipe 11 due to the water pressure of the washing water supplied to the water supply pipe 10', and the washing water flows through the rim side discharge pipe 11. It is discharged through the rim side of the pottery.

Additionally, the remaining water in the rim side pressure chamber 22 passes through the rim side discharge passage 127 and is discharged into the operating hole 111 through the rim side discharge space 121.

The remaining water discharged through the operating hole 111 pressurizes the opening and closing rod 330 on the jet channel side of the check valve 300, and at the same time, the remaining water is discharged to the jet channel side through the discharge hole 350 on the jet channel side.

Here, the rim side opening and closing rod 320 of the check valve 300 is in close contact with the through hole 311 because the pressure is high due to the washing water flowing into the rim side, and the jet channel side opening and closing rod 330 is in close contact with the jet channel side. Since the pressure is low, the through hole 311 is opened by the water pressure of the remaining water.

Here, the jet waterway side discharge hole 350 is in communication with the jet waterway side discharge pipe 12, so that residual water can be discharged to the jet waterway side.

In addition, as shown in Figures 8 and 9, when the jet channel side release part 130 is operated under the control of the control unit after the operation of the rim side release part 120, the valve cam 220 becomes eccentric. It rotates to pressurize the end of the operating rod 134.

The opening/closing port 132 coupled to the operating rod 134 presses the spring 136 to open the discharge space 131 on the jet channel side and the operating hole 111.

At this time, the jet waterway side discharge pipe 12 is opened by the water pressure of the washing water supplied to the jet waterway side diaphragm 21' water supply pipe 10', which was closing the jet waterway side discharge pipe 12, and the washing water is released into the jet. It is discharged to the jet channel side through the water channel side discharge pipe 12.

In addition, the remaining water in the jet waterway side pressure chamber 22' passes through the jet waterway side discharge passage 137 and is discharged into the operating hole 111 through the jet waterway side discharge space 131.

The remaining water discharged through the operating hole 111 pressurizes the rim side opening and closing rod 320 of the check valve 300 by water pressure, and at the same time, the remaining water is discharged to the rim side through the rim side discharge hole 340.

Here, the jet channel side opening and closing rod 330 of the check valve 300 is in a high pressure state due to washing water flowing into the jet channel side, so the end of the jet channel side opening and closing rod 330 is in close contact with the through hole 311 and closed. In this state, the rim side opening and closing rod 320 opens the through hole 311 by the water pressure of the remaining water because the pressure on the rim side is low.

Here, the rim side discharge hole 340 is in communication with the rim side discharge pipe 12, so that residual water can be discharged to the rim side.

Although preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and may be used in the technical field to which the invention pertains without departing from the gist of the invention as claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

Claims

The washing water supplied from the faucet is discharged through the rim side discharge pipe 11 and the jet waterway side discharge pipe 12 of the discharge part 10, respectively, and an opening and closing unit ( A washing water discharge device that opens and closes the discharge portion (10) by the operation of 20),

It is installed in front of the discharge part 10, and when washing water is supplied to the opening and closing part 20, the remaining water remaining in the rim side pressure chamber 22 and the jet channel side pressure chamber 22' of the opening and closing part 20 is removed. A flush valve 100 that releases pressure in the rim side pressure chamber 22 and the jet waterway side pressure chamber 22' by discharging it to the rim side discharge pipe 11 and the jet waterway side discharge pipe 12 through the check valve 300;

A motor drive unit 200 installed below the flush valve 100 to selectively open and close the rim side release unit 120 and the jet channel side release unit 130 by driving a stepping motor 210;

It includes a check valve 300 that discharges residual water discharged from the flush valve 100 into the rim side discharge pipe 11 or the jet channel side discharge pipe 12,

The check valve 300 is,

It is coupled to the rear of the flush valve 100, and a through hole 311 communicating with the operating hole 111 is formed in the central part, and a rim side drain hole 312 communicating with the rim side discharge pipe 11 is formed at one end, A valve pipe 310 having a jet channel side drain hole 313 in communication with the jet channel side discharge pipe 12 at the other end;

A rim-side opening and closing rod 320 coupled to the rim-side drain hole 312;

A jet channel-side opening and closing rod 330 coupled to the jet channel-side drain hole 313;

A rim side discharge hole 340 formed on the rim side of the discharge portion 10 through which residual water discharged through the jet channel side release portion 130 of the flush valve 100 is discharged to the rim side discharge pipe 11;

There is a jet channel side discharge hole 350 formed on the jet channel side of the discharge unit 10 through which residual water discharged through the rim side release part 120 of the flush valve 100 is discharged to the jet channel side discharge pipe 12. A washing water discharge device for a ceramic-integrated bidet, characterized in that it is provided.
In claim 1,

The flush valve 100,

A flush body 110 fixed to the front of the discharge unit 10;

a rim side release unit 120 provided on one side of the flush body 110 to release pressure by discharging residual water in the rim side pressure chamber 22;

Washing water discharge of the ceramic-integrated bidet, characterized in that it includes a jet channel side release unit 130 provided on the other side of the flush body 110 to release the pressure by discharging residual water in the jet channel side pressure chamber 22'. Device.
In claim 2,

The rim side release portion 120,

A rim side discharge space 121 formed on one side of the flush body 110;

An opening/closing port (122) coupled to the rim-side discharge space (121) to selectively communicate with the rim-side discharge space (121) and the operating hole (111);

A support 123 coupled to one side of the opening/closing opening 122;

An operating rod 124 coupled to the other side of the opening/closing opening 122 and having an end exposed to the operating hole 111;

A coupling end 125 formed on the opening and closing part 20 and coupled to the rim side discharge space 121;

A spring 126 mounted between the opening/closing opening 122 and the coupling end 125 to provide elasticity to the opening/closing opening 122;

A washing water discharge device for an appliance-integrated bidet, characterized in that a rim side discharge passage (127) is formed to communicate from the rim side pressure chamber (22) of the opening/closing unit (20) to the rim side discharge space (121).
In claim 2,

The jet channel side release unit 130,

A jet channel side discharge space 131 formed on the other side of the flush body 110;

An opening/closing port (132) coupled to the jet channel side discharge space 131 to selectively communicate with the jet channel side discharge space 131 and the operating hole 111;

A support 133 coupled to one side of the opening 132;

An operating rod 134 coupled to the other side of the opening/closing opening 132 and having an end exposed to the operating hole 111;

A coupling end 135 formed on the opening and closing part 20 and coupled to the jet channel side discharge space 131;

A spring 136 mounted between the opening/closing opening 132 and the coupling end 135 to provide elasticity to the opening/closing opening 132;

Discharge of washing water from the pottery-integrated bidet, characterized in that it is provided with a jet waterway side discharge passage 137 that communicates from the jet waterway side pressure chamber 22' of the opening and closing part 20 to the jet waterway side discharge space 131. Device.
In claim 1,

The motor driving unit 200,

a stepping motor 210 coupled to and fixed to the inside of the flush body 110 at the lower part of the flush valve 100;

A valve cam 220 coupled to the shaft of the stepping motor 210 and rotating eccentrically within the operating hole 111 to selectively pressurize the operating rods 124 and 134 of the flush valve 100;

A washing water discharge device for a toilet-integrated bidet, characterized in that a cap 230 is fixed to the upper part of the flush body 110 and closes the operating hole 111.
In claim 1,

A rim-side opening and closing rod 320 is formed radially on the inner wall of the valve pipe 310 where the rim-side drain hole 312 and the jet channel-side drain hole 313 meet the rim-side discharge hole 340 and the jet channel-side discharge hole 350. And a rib 360 that allows residual water to be discharged by communicating the rim side drain hole 312 and the jet water channel side drain hole 313 even when the jet waterway side opening and closing rod 330 slides. Washing water discharge device.
In claim 1,

The check valve 300 is,

When the remaining water in the rim side pressure chamber 22 flows into the through hole 311 through the flush valve 100, the rim side opening and closing rod 320 closes the through hole 311 by the pressure of the washing water discharged to the rim side, and the jet The waterway side opening and closing rod 330 opens the through hole 311 by the water pressure of the residual water flowing into the through hole 311, and the remaining water is discharged through the jet waterway side drain hole 313,

When the remaining water in the jet waterway side pressure chamber 22' flows into the through hole 311 through the flush valve 100, the jet waterway side opening and closing rod 330 is opened through the through hole 311 by the pressure of the washing water discharged to the jet waterway side. ) is closed, and the rim side opening and closing rod 320 opens the through hole 311 by the water pressure of the remaining water flowing into the through hole 311, and the remaining water is discharged through the rim side drain hole 312. Washing water discharge device.