KR102172250B1 - Membrane Valve and Water Purifying System with The Membrane Valve - Google Patents

Abstract

The present invention relates to a membrane valve and a water purification system using a membrane valve, and more particularly, to a membrane valve performing an operation of opening and closing several flow paths and a water purification system using the membrane valve.
The membrane valve and the water purification system using the membrane valve according to the present invention have the effect of performing an operation of opening and closing several flow paths without a separate power source or sensor.

Description

Membrane Valve and Water Purifying System with The Membrane Valve}

The present invention relates to a membrane valve and a water purification system using a membrane valve, and more particularly, to a membrane valve performing an operation of opening and closing several flow paths and a water purification system using the membrane valve.

There are several types of valves that regulate the flow of fluid. In particular, valves that control the flow path system by performing an operation of opening and closing the flow path are used throughout the industry.

As for valves that automatically open and close the flow path, a solenoid valve that uses an electric signal and a hydraulic valve that opens and closes the flow path using an external pump are mainly used. However, these valves require an external power source and have a complex structure, making maintenance difficult. In addition, when the sensors are interlocked together, a problem in which a malfunction occurs frequently due to frequent failure of the sensor has also been found.

In order to solve this problem, a membrane valve that opens and closes a flow path using the pressure of a fluid flowing through the valve has emerged. Membrane valves can operate without a separate power source and have a relatively simple structure, which is advantageous for maintenance.

However, the membrane valve has a disadvantage in that it cannot perform a complicated opening and closing operation of the flow path. Commercially available membrane valves only open and close one flow path. Due to the limitation of the membrane valve, it was difficult to use the membrane valve in the case of a complex flow path system.

The present invention was devised to solve the above-described necessity, and an object of the present invention is to provide a membrane valve that opens and closes several flow paths, and a water purification system using the same.

A membrane valve according to the present invention for achieving the above object includes: a valve body having an airtight chamber and a first passage, a second passage, a third passage, and a fourth passage formed to be connected to the chamber; An elastic membrane installed in the chamber to separate the chamber of the valve body into a first space communicating with the first passage and a second space communicating with the second passage, the third passage and the fourth passage, respectively; A piston coupled to the membrane and disposed in the second space of the valve body so that a position can be adjusted by the membrane elastically deformed according to a pressure difference between the first space and the second space; When the pressure in the first space is higher than the pressure in the second space and the piston is in the first position, and when the pressure in the second space is higher than the pressure in the first space and the piston is in the second position, the It is closed by a piston and is formed between the piston and the valve body so that the pressure in the first space and the pressure in the second space are balanced to be opened by the piston when the piston is in the third position. A first connection passage connecting the passage and the third passage; When the piston is in the first position, it is closed by the piston, and when the piston is in the second and third positions, it is formed in the piston so as to be opened by the third and fourth flow passages. It is characterized in that it includes a second connection flow path for connecting the.

The membrane valve and the water purification system using the membrane valve according to the present invention have the effect of performing an operation of opening and closing several flow paths without a separate power source or sensor.

1 is a cross-sectional view of a piston of a membrane valve according to an embodiment of the present invention in a first position.
FIG. 2 is a cross-sectional view of a piston of the membrane valve shown in FIG. 1 in a second position.
FIG. 3 is a cross-sectional view of a piston of the membrane valve shown in FIG. 1 in a third position.
4 to 6 are operational state diagrams of a water purification system using a membrane valve according to an embodiment of the present invention.
7 is a perspective view of a membrane valve according to another embodiment of the present invention.
8 is an exploded perspective view of the membrane valve shown in FIG. 7.

Hereinafter, a membrane valve according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 to 3, the membrane valve of the present embodiment includes a valve body 100, a membrane 200, a piston 400, a plunger 300, a first connection flow path 500, and a second connection flow path ( 600) and a third connection flow path 700.

The valve body portion 100 is a housing in which the components of the membrane valve of this embodiment are installed. The valve body 100 may be made of various materials. When securing stiffness and durability are important, the valve body 100 may be formed of a metal material, and the valve body 100 may be configured of a plastic material to reduce manufacturing cost and facilitate manufacturing.

The valve body 100 includes a chamber 110, a first flow passage 120, a second flow passage 130, a third flow passage 140 and a fourth passage 150. 1 to 3, the chamber 110 of the valve body part 100 is a space existing inside the valve body part 100. Fluid may flow or stagnate in this space. The chamber 110 is hermetically sealed by the valve body 100.

The first passage 120, the second passage 130, the third passage 140 and the fourth passage 150 are formed in the valve body portion 100 to be connected to the chamber 110. The first passage 120 is formed in the valve body 100 from the uppermost side, and the fourth passage 150 is formed in the valve body 100 from the lowermost side. Each of the first passages 120 to the fourth passages 150 may have a fitting connection (not shown) connected to a fitting to allow external fluid to flow.

The membrane 200 is installed in the chamber 110. 1 to 3, the membrane 200 is fitted into a groove formed in the chamber 110. The membrane 200 fitted in the groove formed in the chamber 110 in this way separates the chamber 110 into a first space 111 and a second space 112, respectively. The first space 111 is a space located above the membrane 200. The first space 111 is connected to the first flow path 120. The second space 112 is a space located under the membrane 200. The second space 112 is connected to the second passage 130, the third passage 140, and the fourth passage 150, respectively. The membrane 200 is made of an elastic material so that it can be deformed according to a pressure difference between the first space 111 and the second space 112. The membrane 200 may be made of a material having elasticity such as silicone or latex.

The piston 400 is disposed in the second space 112 of the valve body 100. The piston 400 is located under the membrane 200 so that its position is adjusted according to the elastic deformation of the membrane 200 according to the pressure difference between the first space 111 and the second space 112. The outer wall of the piston 400 abuts against the inner wall of the second space 112 of the valve body 100. Accordingly, the second space 112 of the valve body 100 is filled with the piston 400.

The plunger 300 is installed between the membrane 200 and the piston 400 to adjust the position of the piston 400 through elastic deformation of the membrane 200. 1 to 3, the plunger 300 is fitted to the membrane 200 from the lower side of the membrane 200, and the piston 400 is fitted to the plunger 300. That is, the piston 400 is coupled to the membrane 200 through the plunger 300. The plunger 300 hermetically seals the inner space of the piston 400 and transmits the pressure of the fluid filled in the piston 400 to the membrane 200.

The first connection flow path 500 is formed between the piston 400 and the valve body portion 100 to connect the second flow path 130 and the third flow path 140. The first connection flow path 500 is opened and closed by the piston 400. When the pressure in the first space 111 is higher than the pressure in the second space 112, the piston 400 is located at the lowermost side of the second space 112. This is defined as the first position. When the pressure in the second space 112 is higher than the pressure in the first space 111, the piston 400 is located at the uppermost side of the second space 112. This is defined as the second position. When the pressure in the first space 111 and the pressure in the second space 112 are balanced, the piston 400 is located in the middle of the second space 112 (a position between the first and second positions) do. This is defined as the third position. The first connection flow path 500 is opened when the piston 400 is located in the third position. Referring to FIGS. 1 to 3, in the present embodiment, the first connection flow path 500 connects the second flow path 130 and the third flow path 140 through a groove formed in the outer peripheral portion of the piston 400. The piston 400 includes a first O-ring 410 installed by being fitted to the outer circumferential portion of the piston 400 from the upper and lower portions based on the groove formed in the outer peripheral portion of the piston 400 described above. When the piston 400 is in the first position and the second position, the first O-ring 410 and the inner wall of the second space 112 of the valve body 100 contact each other to seal the first connection flow path 500.

The second connection flow path 600 connects the third flow path 140 and the fourth flow path 150. The second connection flow path 600 is formed in the valve body 100 and has a shape corresponding to the second connection flow path protrusion 610 and the second connection flow path protrusion 610 protruding into the second space 112. It consists of a second connection flow path 620 formed on the lower side of the 400). 1 to 3, the second connection flow path 600 is located under the second space 112. The second connection passage 600 is opened when the piston 400 is in the second position and the third position, and is closed when the piston 400 is in the first position.

The third connection flow path 700 is formed in the valve body portion 100 to connect the third flow path 140 and the fourth flow path 150 when the piston 400 is in the second position. Referring to FIG. 2, when the piston 400 is in the second position, the third connection passage 700 is a portion where the third passage 140 and the fourth passage 150 are connected. 1 and 3, when the piston 400 is in the first position and the third position, the third connection flow path 700 shown in FIG. 2 is fitted to the outer periphery of the piston 400 to be installed. It is airtight by the 2 O-ring 420.

Hereinafter, the operation of the membrane valve according to the present embodiment configured as described above will be described.

First, a case where the piston 400 is located in the first position will be described with reference to FIG. 1.

As described above, the first position of the piston 400 is a case where the piston 400 is located at the lowermost side of the second space 112 of the chamber 110. The fluid introduced through the first flow path 120 increases the pressure in the first space 111. When the pressure formed in the first space 111 is higher than the pressure in the second space 112, the membrane 200 undergoes elastic deformation to be bent downward. When the membrane 200 is bent downward, the elastic deformation of the membrane 200 is transmitted to the piston 400 through the plunger 300. The piston 400 descends due to elastic deformation of the membrane 200. The descending of the piston 400 proceeds until the lower surface of the piston 400 contacts the bottom of the second space 112. In this way, the piston 400 is located at the lowermost side of the second space 112 of the chamber 110.

In this state, both the first connection flow path 500, the second connection flow path 600, and the third connection flow path 700 are closed. As shown in FIG. 1, in the first connection flow path 500, the first O-ring 410 fitted in the outer circumferential portion of the piston 400 abuts against the valve body 100 and is closed. The second connection flow path 600 is closed by fitting a second connection flow path protrusion 610 formed on the valve body 100 into the second connection flow path 620 of the piston 400. The third connection flow path 700 is closed by a second O-ring 420 fitted to the outer circumferential portion of the piston 400 abuts against the valve body portion 100. In this way, when all of the first connection flow path 500 to the third connection flow path 700 are closed, the fluid cannot flow between the second flow path 130 and the third flow path 140, and the third flow path 140 and the fourth flow path are closed. Fluid cannot flow even between the flow paths 150.

Next, a case where the piston 400 is located in the second position will be described with reference to FIG. 2.

As described above, the second position of the piston 400 is when the piston 400 is located at the uppermost side of the second space 112 of the chamber 110. The pressure in the first space 111 is lowered by the fluid flowing out through the first flow path 120. If the pressure formed in the first space 111 is lower than the pressure of the second space 112, the membrane 200 undergoes elastic deformation by bending upwards. When the membrane 200 is bent upward, the elastic deformation of the membrane 200 is transmitted to the piston 400 through the plunger 300. The piston 400 rises due to elastic deformation of the membrane 200. The piston 400 is raised until the membrane 200 contacts the inner wall of the first space 111 of the chamber 110 and the elastic deformation is stopped. In this way, the piston 400 is located at the uppermost side of the second space 112 of the chamber 110.

In this state, the first connection flow path 500 is closed, and the second connection flow path 600 and the third connection flow path 700 are opened. As shown in FIG. 2, the first connection flow path 500 is closed by a first O-ring 410 fitted in the outer peripheral portion of the piston 400 in contact with the valve body portion 100. The second connection flow path 600 is opened after a second connection flow path protrusion 610 formed in the valve body 100 is separated from the second connection flow path port 620 of the piston 400. In the third connection flow path 700, a second O-ring 420 fitted in the outer peripheral portion of the piston 400 is opened while being spaced apart from the valve body portion 100. When the first connection flow path 500 is closed in this way, the fluid flow between the second flow path 130 and the third flow path 140 is blocked. Due to the opening of the second connection flow path 600 and the third connection flow path 700, a fluid flows between the third flow path 140 and the fourth flow path 150.

Next, a case where the piston 400 is located in the third position will be described with reference to FIG. 3.

As described above, the third position of the piston 400 is when the piston 400 is located in the middle of the second space 112 of the chamber 110. When the pressure of the first space 111 and the pressure of the second space 112 are balanced, the membrane 200 is fixed between the first space 111 and the second space 112 without elastic deformation. Therefore, the piston 400 is located in the middle of the second space 112 of the chamber 110.

In this state, the first connection flow path 500 and the second connection flow path 600 are opened, and the third connection flow path 700 is closed. As shown in FIG. 3, the first connection flow path 500 connects the second flow path 130 and the third flow path 140 through a groove formed in the outer peripheral portion of the piston 400. The second connection flow path 600 is opened after a second connection flow path protrusion 610 formed in the valve body 100 is separated from the second connection flow path port 620 of the piston 400. The third connection flow path 700 is closed by a second O-ring 420 fitted to the outer circumferential portion of the piston 400 abuts against the valve body portion 100. When the first connection flow path 500 is opened in this way, a fluid may flow between the second flow path 130 and the third flow path 140. In addition, due to the opening of the second connection passage 600, a fluid may flow between the third passage 140 and the fourth passage 150. As a result, when the piston 400 is located in the third position, both the second passage 130 and the third passage 140 and the fourth passage 150 are connected.

The membrane valve according to the present invention operates to open and close three flow paths by moving the piston 400 through the membrane 200. When the operation of opening and closing three flow paths through one membrane 200 is performed, a more complex flow path system can be configured. In particular, in the case of a system in which several flow paths must be opened and closed, the membrane valve according to the present invention can be more effectively utilized. In addition, since the membrane valve according to the present invention operates through the membrane 200, there is an advantage that the opening and closing of the flow path can be controlled using the pressure of the fluid without a separate power source, sensor, or control device.

Next, another embodiment of the membrane valve according to the present invention will be described with reference to FIGS. 7 and 8.

The membrane valve of this embodiment includes all the configurations of the membrane valve of the embodiment described with reference to FIGS. 1 to 3 above. Therefore, a description of the same configuration will be omitted.

Referring to FIG. 8, unlike the membrane valves shown in FIGS. 1 to 3, in the membrane valve of the present embodiment, all of the first passages 120 to the fourth passages 150 are not formed in the same direction. That is, referring to FIG. 7, the first flow passage 120 and the third flow passage 140 are formed in the valve body 100 from one side, and the second flow passage 130 and the fourth flow passage 150 are the first flow passages ( It is formed in the valve body portion 100 on the opposite side of the one side 120 and the third passage 140 is formed.

Hereinafter, a water purification system using a membrane valve according to an embodiment of the present invention having the above-described membrane valve will be described with reference to FIGS. 4 to 6.

The water purification system using the membrane valve of the present embodiment includes a membrane valve, a raw water pipe 40, a reverse osmosis filter 10, a first water purification pipe 51, a water purification valve 30, a water purification tank 20, and a second water purification pipe 52. ) And a first waste water pipe 61 and a second waste water pipe 62 and a third waste water pipe 63.

The raw water pipe 40 is a passage through which raw water is introduced from the outside. The raw water flowing into the raw water pipe 40 may be ground water or tap water.

The reverse osmosis filter 10 is connected to the raw water pipe 40. The reverse osmosis filter 10 purifies raw water using a known reverse osmosis water purification method.

The first wastewater pipe 61 connects the reverse osmosis filter 10 and the fourth flow path 150 of the membrane valve. The first wastewater pipe 61 is connected to the fourth flow path 150 through a fitting connected to the fitting connector of the fourth flow path 150. Wastewater discharged from the reverse osmosis filter 10 through the first wastewater pipe 61 is delivered to the fourth flow path 150 of the membrane valve.

The first water purification pipe 51 connects the reverse osmosis pressure filter 10 and the water purification valve 30. The purified water purified by the reverse osmosis filter 10 flows through the first water purification pipe 51. A check valve is installed in the first water purification pipe 51 to prevent reverse flow of purified water flowing through the first water purification pipe 51. The first water purification pipe 51 is opened and closed by the water purification valve 30. The water purification valve 30 may open and close the first water purification pipe 51 in various known ways. For example, the water purification valve 30 may be a single lever type water valve commonly used in homes.

The water purification tank 20 includes an outer tank 21 and an inner tank 22. The inner tank 22 is disposed inside the outer tank 21. The inner tank 22 is made of a flexible material so that the fluid in the outer tank 21 can pressurize the inner tank 22. That is, the water purification tank 20 has a dual structure of an outer tank 21 and an inner tank 22.

The inner tank 22 of the water purification tank 20 is connected to the first water purification pipe 51. The internal tank 22 may store purified water discharged from the reverse osmosis filter 10 through the first water purification pipe 51 and may discharge purified water stored through the first water purification pipe 51 to the water purification valve 30.

The second wastewater pipe 62 connects the external tank 21 of the water purification tank 20 and the third flow path 140 of the membrane valve. The second wastewater pipe 62 is connected to the third passage 140 through a fitting connected to the fitting connector of the third passage 140. Wastewater may be discharged or supplied to the external tank 21 through the second wastewater pipe 62.

The second water purification pipe 52 is connected to the first flow path 120 of the membrane valve. The second water purification pipe 52 is connected to the first flow path 120 through a fitting connected to the fitting connector of the first flow path 120. 4 to 6, the second water purification pipe 52 is branched from the first water purification pipe 51 between the internal tank 22 of the water purification tank 20 and the water purification valve 30. The pressure change in the first water purification pipe 51 is transmitted to the first flow path 120 of the membrane valve through the second water purification pipe 52.

The third wastewater pipe 63 is connected to the second flow path 130 of the membrane valve. The third wastewater pipe 63 is connected to the second flow path 130 through a fitting connected to the fitting connector of the second flow path 130. The wastewater flowing into the second flow path 130 through the third wastewater pipe 63 is discharged to the outside.

Hereinafter, the operation of the water purification system using the membrane valve according to the present embodiment configured as described above will be described.

First, an operation of storing purified water in the internal tank 22 of the purified water tank 20 will be described with reference to FIG. 4.

Raw water is introduced through the raw water pipe 40, and the raw water introduced into the raw water pipe 40 is introduced into the reverse osmosis filter 10 connected to the raw water pipe 40. The reverse osmosis filter 10 purifies raw water according to the reverse osmosis pressure principle. The purified water purified through the reverse osmosis filter 10 flows into the internal tank 22 of the water purification tank 20 through the first water purification pipe 51. In addition, some of the purified water purified through the reverse osmosis filter 10 flows toward the water purification valve 30. Since the water purification valve 30 is closed, the purified water flowing toward the water purification valve 30 flows into the first flow path 120 of the membrane valve through the second water purification pipe 52 branched from the first water purification pipe 51. As described above, since a check valve is installed in the first water purification pipe 51, the flow of water flowing from the second water purification pipe 52 to the first water purification pipe 51 is blocked. Purified water continues to flow from the second water purification pipe 52 to the first flow path 120 until the first space 111 and the second water purification pipe 52 of the membrane valve are filled with purified water. Meanwhile, wastewater generated by the reverse osmosis filter 10 flows into the fourth flow path 150 of the membrane valve through the first wastewater pipe 61.

When purified water flows into the internal tank 22 of the water purification tank 20, the internal tank 22 made of a flexible material expands. When the inner tank 22 expands due to the inflow of purified water, the outer tank 21 is pressurized. When the outer tank 21 is pressurized by the expansion of the inner tank 22, the wastewater filled in the outer tank 21 flows into the third flow path 140 through the second wastewater pipe 62.

In summary, the purified water generated by the reverse osmosis filter 10 flows into the first flow path 120 through the first water purification pipe 51 and the second water purification pipe 52, and is generated by the reverse osmosis pressure filter 10. Wastewater flows into the fourth flow path 150 of the membrane valve through the first wastewater pipe 61, and the wastewater filled in the external tank 21 passes through the second wastewater pipe 62 and passes through the third flow path ( 140).

In this state, the piston 400 of the membrane valve is positioned in the third position described above. In other words, the pressure generated in the first space 111 of the membrane valve and wastewater flows into the third flow passage 140 and the fourth flow passage 150 as the purified water flows into the first flow passage 120, The pressures generated in the space 112 are balanced with each other. When the piston 400 of the membrane valve is positioned at the third position, the first connection flow path 500 and the second connection flow path 600 of the membrane valve are opened as described above. As shown in FIG. 3, the wastewater flowing into the third flow path 140 and the fourth flow path 150 according to the opening of the first connection flow path 500 and the second connection flow path 600 of the membrane valve is It flows out through the flow path 130. The wastewater discharged through the second flow path 130 is discharged to the outside through the third wastewater pipe 63. This state continues until the inner tank 22 of the purification tank 20 is filled with purified water. When the inner tank 22 made of a flexible material is filled with water, the inner tank 22 does not pressurize the outer tank 21 any more, so that wastewater does not flow out from the outer tank 21. The present invention transmits the water state of the inner tank 22 to the membrane valve through the amount of wastewater discharged from the outer tank 21 without a separate sensor device through the water purification tank 20 having a dual structure.

Next, with reference to FIG. 5, when the inner tank 22 of the water purification tank 20 is filled with purified water, the operation of the water purification system using the membrane valve according to the present embodiment will be described.

When the inner tank 22 of the purified water tank 20 is filled with purified water, the inner tank 22 no longer expands. When the inner tank 22 stops expanding, the inner tank 22 does not pressurize the outer tank 21. When the external tank 21 is not pressurized, wastewater does not flow from the external tank 21 to the third flow path 140 of the membrane valve through the second wastewater pipe 62.

In the above-described water purification operation, the pressure in the first space 111 of the membrane valve generated by the purified water flowing into the first flow passage 120 and the wastewater flowing into the third flow passage 140 and the fourth flow passage 150 are generated. Due to the balance of the pressure in the second space 112 of the membrane valve, the piston 400 of the membrane valve is located at the third position. The first space 111 and the second water purification pipe 52 of the membrane valve are filled with purified water to maintain a constant pressure. If the wastewater does not flow into the third flow path 140, the pressure in the second space 112 of the membrane valve is lowered. Accordingly, the pressure in the first space 111 of the membrane valve is greater than the pressure in the second space 112 of the membrane valve. When the pressure in the first space 111 of the membrane valve is greater than the pressure in the second space 112 of the membrane valve, the piston 400 of the membrane valve descends. When the piston 400 of the membrane valve descends, the piston 400 of the membrane valve is located at the first position.

When the piston 400 of the membrane valve is positioned at the first position, all of the first connection flow path 500 to the third connection flow path 700 of the membrane valve are closed. Accordingly, the wastewater generated by the reverse osmosis filter 10 is stagnated in the first wastewater pipe 61, and the flow of wastewater flowing out through the second flow path 130 and the third wastewater pipe 63 of the membrane valve is blocked. .

In summary, the outflow of wastewater from the external tank 21 of the water purification tank 20 is stopped, the wastewater flowing into the third flow path 140 is blocked, and the piston 400 of the membrane valve descends and is located at the first position to remove the wastewater. All of the first connection passage 500 to the third connection passage 700 are closed to block the flow of wastewater. As described above, the present invention has the advantage of performing an operation of opening and closing the flow path without a separate power source through the membrane valve and the double-structure water purification tank 20.

Next, the operation of the water purification system using the membrane valve according to the present embodiment when the water purification valve 30 is opened will be described with reference to FIG. 6.

When the water purification valve 30 is opened, purified water moves from the first water purification pipe 51 to the water purification valve 30. In addition, as the purified water filled in the first space 111 and the second water purification pipe 52 of the membrane valve can be moved to the water purification valve 30, the pressure in the first space 111 of the membrane valve is lowered. When the pressure in the first space 111 of the membrane valve decreases, the piston 400 of the membrane valve rises. When the piston 400 of the membrane valve rises, the piston 400 is located in the second position.

When the piston 400 of the membrane valve is positioned at the second position, the second connection flow path 600 and the third connection flow path 700 are opened as described above. When the second connection flow path 600 and the third connection flow path 700 of the membrane valve are opened, the wastewater discharged from the reverse osmosis filter 10 passes through the first wastewater pipe 61 to the fourth flow path 150 of the membrane valve. And flows into the external tank 21 of the water purification tank 20 through the second wastewater pipe 62 through the third flow path 140 of the membrane valve. Wastewater flowing into the outer tank 21 of the water purification tank 20 pressurizes the inner tank 22. When the internal tank 22 is pressurized, the purified water filled in the internal tank 22 is discharged to the water purification valve 30 through the first water purification pipe 51. As such, the purified water tank 20 of the present invention has an effect of discharging the purified water filled in the inner tank 22 through the wastewater flowing into the outer tank 21 without a separate power source.

At this time, since the second connection flow path 600 and the third connection flow path 700 of the membrane valve are simultaneously opened, wastewater is strongly discharged from the reverse osmosis filter 10. When the wastewater is strongly discharged from the reverse osmosis filter 10, the debris attached to the reverse osmosis filter 10 is also washed away, thereby cleaning the reverse osmosis filter 10.

The water purification system using a membrane valve according to the present invention utilizes wastewater introduced from the external tank 21 to discharge purified water stored in the internal tank 22 to the water purification valve 30. As such, it is very economical because it is possible to supply the stored purified water using the structure of the water purification tank 20 of the water purification system using the membrane valve and the membrane valve without using a separate power source.

In addition, as described above, when the water purification valve 30 is opened, wastewater is strongly discharged from the reverse osmosis filter 10, and since the reverse osmosis filter 10 is cleaned, it is easy to maintain the filter in a clean state for a long time.

The present invention has been described with a preferred example, but the scope of the present invention is not limited to the form described and illustrated above.

For example, it has been described above that a third connection flow path 700 connecting the third flow path 140 and the fourth flow path 150 is formed in the valve body 100, but the third connection flow path 700 A configuration not provided with is also possible.

In addition, it has been described above that the membrane 200 and the piston 400 are coupled through the plunger 300, but in some cases, a configuration in which the piston is directly connected to the membrane is also possible.

In addition, it has been described above that the membrane 200 is inserted into the groove of the chamber 110 to be fixed, but the membrane may be installed in the chamber in various ways. For example, the membrane may be installed by being screwed into the chamber.

In addition, it has been described above that the second connection flow path 600 is opened and closed by the second connection flow path protrusion 610 formed in the valve body 100 and the second connection flow path hole 620 formed in the piston 400. , The configuration for opening and closing the second connection flow path is not limited to the above configuration. For example, the second connection flow path may be configured to be closed in a state in which the valve body and the piston are in contact.

In addition, in the above, it has been described that the first O-ring 410 is installed on the outer circumference of the piston 400 in the upper and lower portions of the first connection flow path 500 so that the first connection flow path 500 is airtight. It has been described that the second O-ring 420 is installed on the outer periphery of the piston 400 so as to seal 700, but the installation position and number of O-rings may be variously changed.

10: reverse osmosis filter 20: water purification tank
21: outer tank 22: inner tank
30: water purification valve 40: raw water pipe
51: first water purification pipe 52: second water purification pipe
61: first wastewater pipe 62: second wastewater pipe
63: 3rd wastewater pipe
100: valve body 110: chamber
111: first space 112: second space
120: first euro 130: second euro
140: 3rd euro 150: 4th euro
200: membrane 300: plunger
400: piston 410: first O-ring
420: second O-ring 500: first connection flow path
600: second connection flow path 610: second connection flow path protrusion
620: second connection flow path 700: third connection flow path

Claims (7)

A valve body portion having an airtight chamber and a first passage, a second passage, a third passage and a fourth passage formed to be connected to the chamber;
An elastic membrane installed in the chamber to separate the chamber of the valve body into a first space on the upper side communicating with the first channel and a second space on the lower side communicating with the second channel, third channel, and fourth channel, respectively. ;
A piston coupled to the membrane and disposed in the second space of the valve body so that the position can be adjusted by the membrane elastically deformed according to the pressure difference between the first space and the second space;
When the pressure in the first space is higher than the pressure in the second space and the piston is in the first position at the lowermost side of the second space and the pressure in the second space is higher than the pressure in the first space, the piston When it is in the second position at the top of the second space, it is closed by the piston, and the pressure in the first space and the pressure in the second space are balanced so that the piston is positioned between the first and second positions. A first connection channel formed between the piston and the valve body to be opened by the piston when it is in a third position, which is a position in the middle of the second space, connecting the second channel and the third channel; And
When the piston is in the first position, it is closed by the piston, and when the piston is in the second and third positions, it is formed in the piston so as to be opened by the third and fourth flow passages. Membrane valve comprising a; second connection flow path for connecting the. The method of claim 1,
The membrane valve further comprises a third connection channel formed in the valve body to connect the third channel and the fourth channel when the piston is in the second position. The method according to claim 1 or 2,
The second connection flow path is formed in the valve body portion and protrudes into the second space of the chamber, and the second connection flow path projection of the chamber when the piston is in the first position. When the second connection flow path is closed and the piston is in the second and third positions, the second connection flow path is opened by the second connection flow path protrusion of the chamber, corresponding to the second connection flow path projection of the valve body. Membrane valve consisting of a second connection flow path formed in the piston in a shape. The method of claim 3,
A membrane valve further comprising a plunger installed between the membrane and the piston so that the position of the piston can be adjusted through elastic deformation of the membrane to couple the piston to the membrane. The method of claim 3,
The piston further includes a first O-ring fitted and installed on an outer circumference of the piston so as to seal the first connection flow path when the piston is in the first position and the second position, and the piston is in the first position and When in the third position, the membrane valve further includes a second O-ring fitted to the outer peripheral portion of the piston so as to seal the third connection flow path. The membrane valve of claim 1;
A raw water pipe through which raw water is introduced;
A reverse osmosis filter connected to the raw water pipe to purify the raw water in a reverse osmosis method;
A first water purification pipe connected to the reverse osmosis filter to deliver purified water discharged from the reverse osmosis filter;
A water purification valve connected to the first water purification pipe to open and close the first water purification pipe; a first wastewater pipe connected to the reverse osmosis filter to deliver the wastewater discharged from the reverse osmosis filter to the fourth flow passage;
A water purification tank including an external tank and an internal tank made of a flexible material that is connected to the first water purification pipe so that the purified water is stored or supplied and disposed inside the external tank;
A second water pipe branching from the first water pipe and connected to the first passage to transmit a pressure change of the first water pipe according to the opening and closing of the water purification valve to the first passage;
A second wastewater pipe connecting the external tank of the water purification tank and the third flow path; And
When the first connection flow path and the second connection flow path are opened by the piston, the wastewater flowing into the fourth flow path through the first wastewater pipe and the wastewater flowing into the third flow path through the second wastewater pipe are collected. A water purification system using a membrane valve comprising a; third wastewater pipe connected to the second flow passage to discharge to the outside. The method of claim 6,
The second water purification pipe is a water purification system using a membrane valve branched from the first water pipe between the internal tank of the water purification tank and the water purification valve.

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