A high-purity water packaging, preservation device and method

By using a separator and a telescopic diaphragm in the high-purity water dispensing device, combined with nitrogen to isolate air contact, the problem of contamination during the high-purity water dispensing process is solved, achieving contamination-free dispensing and transportation of high-purity water and maintaining stable water quality.

CN115872039BActive Publication Date: 2025-12-02QINGDAO FUSION PHOTOELECTRIC TECH CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202211740372.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-31
Publication Date
2025-12-02
Estimated Expiration
2042-12-31

AI Technical Summary

Technical Problem

High-purity water is easily contaminated by air during the dispensing process, which leads to a decline in water quality, especially when temporary water supply points lack fixed pipelines, thus affecting the effectiveness of use.

Method used

A high-purity water dispensing and preservation device is adopted. By setting a partition component and a telescopic diaphragm in the outer box, the containing space is divided into a water storage area and a pressure regulating area. Nitrogen gas is used to isolate air contact, and combined with the pressure regulation of the telescopic diaphragm, the high-purity water can be dispensed and transported without pollution.

Benefits of technology

It effectively prevents high-purity water from being contaminated by air during packaging and transportation, maintains stable water quality, and ensures that the water quality does not decline. It is suitable for supplying high-purity water to temporary water use points.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN115872039B_ABST
    Figure CN115872039B_ABST
Patent Text Reader

Abstract

This invention proposes a high-purity water packaging and preservation device, comprising an outer casing with a accommodating space. Within the accommodating space of the outer casing, a partition component and a telescopic diaphragm are arranged. The telescopic diaphragm is fixedly connected to the partition component, dividing the accommodating space of the outer casing into a water storage area and a pressure regulating area. The spatial areas of the pressure regulating area and the water storage area increase and decrease in opposite directions. The top of the outer casing is provided with a water inlet pipe, a nitrogen regulating pipe, and a vent pipe. The lower part of the outer casing, from top to bottom, is provided with a water outlet pipe and a vent pipe. The water outlet pipe, vent pipe, water inlet pipe, and nitrogen regulating pipe are all connected to the water storage area, and the vent pipe is connected to the pressure regulating area. Therefore, this invention is applicable to the use of high-purity water and ultrapure water in the production of carrier glass, preventing the deterioration of high-purity water and ultrapure water during packaging and transportation.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This invention belongs to the field of carrier glass production technology, and specifically relates to a high-purity water filling, preservation device and method. Background Technology

[0002] Currently, in the production process of carrier glass, the subsequent processing stages include grinding and cleaning of the carrier glass, using high-purity water with a resistivity of 2 MΩ·cm and ultrapure water with a resistivity of 18 MΩ·cm, respectively. Before carrier glass production, high-purity water with a resistivity of 2-10 MΩ·cm is also needed to grout and construct the production equipment to ensure its cleanliness. Because high-purity and ultrapure water contain almost only water molecules and have extremely high purity, they are highly susceptible to contamination. Even when exposed to air, they can be contaminated by carbon dioxide and dust particles, leading to a deterioration in water quality. Ultrapure water with a resistivity of 15 MΩ·cm or higher will drop to 3-4 MΩ·cm after 1 minute of exposure to air, and to below 2 MΩ·cm after 3 minutes. For large-scale pure water usage points, air-isolated water tanks and clean transport pipelines are typically used for high-purity water delivery; however, temporary and scattered usage points often lack fixed pipeline supply, thus requiring water to be packaged in buckets and transported to the usage points. Ordinary water buckets can come into contact with air during the repackaging process, causing the high-purity water to become contaminated and deteriorate, affecting its use. Summary of the Invention

[0003] This invention proposes a high-purity water filling and preservation device and method, which solves the problems in the prior art.

[0004] The technical solution of the present invention is implemented as follows: a high-purity water filling and preservation device includes an outer box with a accommodating space. A partition component and a telescopic diaphragm are arranged in the accommodating space of the outer box. The telescopic diaphragm is fixedly connected to the partition component to divide the accommodating space of the outer box into a water storage area and a pressure regulating area. The spatial areas of the pressure regulating area and the water storage area increase and decrease in opposite directions. A water inlet pipe, a nitrogen regulating pipe and a vent pipe are arranged on the top of the outer box. A water outlet pipe and a vent pipe are arranged sequentially from top to bottom on the lower part of the outer box. The water outlet pipe, the vent pipe, the water inlet pipe and the nitrogen regulating pipe are all connected to the water storage area. The vent pipe is connected to the pressure regulating area.

[0005] In a preferred embodiment, the partition assembly includes a partition plate, which is folded in shape. The front, rear, and bottom sides of the partition plate are fixedly connected to the inner wall of the outer casing. The top of the partition plate is spaced apart from the top wall of the inner side of the outer casing. The inner wall of the outer casing has a high liquid level indicator. The height of the top of the partition plate is not lower than the height of the high liquid level indicator. The top of the telescopic diaphragm is fixedly connected to the top wall of the inner side of the outer casing.

[0006] In a preferred embodiment, the partition includes a first vertical plate and a second vertical plate arranged vertically from top to bottom, with a horizontal plate between the first vertical plate and the second vertical plate. The first vertical plate and the second vertical plate are respectively arranged on both sides of the horizontal plate, and the telescopic diaphragm is arranged on the side of the horizontal plate that is flush with the second vertical plate. The area where the telescopic diaphragm extends and retracts to the left and right is the area in the horizontal direction where the width of the horizontal plate is located.

[0007] In a preferred embodiment, the partition assembly further includes a horizontal frame fixedly installed on the top wall and the horizontal plate inside the outer box, and vertical frames fixedly installed on the front and rear sides of the inner wall of the outer box. The horizontal frame and the vertical frame are integrally connected to form a square mounting frame. The mounting frame is spaced apart from the surface of the first vertical plate, and the telescopic diaphragm is fixedly installed inside the mounting frame.

[0008] In a preferred embodiment, the periphery of the telescopic diaphragm is integrally provided with a protrusion, the protrusion is located inside the mounting frame, and a sealing gasket is fixedly provided between the protrusion and the periphery of the telescopic diaphragm, the sealing gasket abutting against the surface of the mounting frame.

[0009] A high-purity water dispensing and preservation device and method, employing a portable high-purity water dispensing and preservation device, wherein a high-purity water inlet valve is fixedly installed on the water inlet pipe, a nitrogen regulating valve is fixedly installed on the nitrogen regulating pipe, a high-purity water outlet valve is fixedly installed on the water outlet pipe, a nitrogen outlet valve is fixedly installed on the gas outlet pipe, and a nitrogen detection device is installed at the nitrogen regulating pipe, characterized in that it includes:

[0010] Step 1: Fill the water storage area with nitrogen;

[0011] Step 2: Replenish the nitrogen-filled water storage area with high-purity water;

[0012] Step 3: The pressure regulating area becomes larger and the water storage area becomes smaller to obtain high-purity water.

[0013] In a preferred embodiment, in the first step, the nitrogen regulating pipeline is connected to the nitrogen source, the nitrogen outlet valve is opened, and nitrogen is used to fill the water storage area of ​​the external box. When the nitrogen detection device detects that nitrogen is continuously overflowing from the nitrogen outlet valve, the nitrogen source and the nitrogen outlet valve are closed.

[0014] In a preferred embodiment, in the second step, the inlet pipe is connected to the outlet of the high-purity water equipment, the high-purity water inlet valve is opened, and high-purity water enters the water storage area from the outer casing. Excess nitrogen in the outer casing overflows from the nitrogen regulating valve.

[0015] In a preferred embodiment, the water level in the second step does not exceed the height indicated by the high level indicator. After the water intake is completed, the high-purity water inlet valve and the nitrogen regulating valve are closed.

[0016] In a preferred embodiment, in the third step, the high-purity water outlet valve is opened, the pressure regulating area is connected to the outside through the vent, the telescopic diaphragm in the pressure regulating area extends, the volume of the pressure regulating box increases, the volume of the water storage area decreases, and the high-purity water is forced out from the high-purity water outlet valve.

[0017] After adopting the above technical solution, the beneficial effects of the present invention are:

[0018] 1. A partition and a telescopic diaphragm are installed inside the outer chamber. The telescopic diaphragm adjusts the pressure inside the outer chamber by extending and retracting. The partition is connected to the telescopic diaphragm, while also isolating the diaphragm from contact with the high-purity water to prevent contamination of the high-purity water.

[0019] 2. Nitrogen gas is added to the water storage area. Since nitrogen gas is less dense than air, the air is discharged through the nitrogen gas outlet valve, ensuring that the water stored in the water tank is not contaminated by the air.

[0020] 3. Open the high-purity water outlet valve. Under atmospheric pressure, the pressure regulating box diaphragm will extend, increasing the volume of the pressure regulating area while decreasing the volume of the water storage area. The high-purity water will then be discharged under pressure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 3 for Figure 2 A schematic diagram of the vertical cross-section;

[0025] Figure 4 This is a schematic diagram of the connection between the telescopic diaphragm and the cross frame.

[0026] In the diagram, 1. Nitrogen regulating valve; 2. High-purity water outlet valve; 3. Nitrogen vent valve; 4. Nitrogen detection device; 5. Rubber soft plug interface; 6. High-purity water inlet valve; 7. Vent pipe; 8. Telescopic diaphragm; 9. Partition; 10. Water storage area; 11. Pressure regulating area; 12. High liquid level indicator; 13. Water outlet pipe; 14. Vent pipe; 15. Water inlet pipe; 16. Nitrogen regulating pipe; 17. Sealing gasket; 18. First vertical plate; 19. Second vertical plate; 20. Horizontal plate; 21. Horizontal frame; 22. Vertical frame; 23. Mounting frame; 24. Protrusion. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1-4 The device for storing and preserving high-purity water includes an outer casing with a accommodating space. A partition assembly and a telescopic diaphragm 8 are disposed within the accommodating space of the outer casing. The telescopic diaphragm 8 is fixedly connected to the partition assembly, dividing the accommodating space of the outer casing into a water storage area 10 and a pressure regulating area 11. The spatial areas of the pressure regulating area 11 and the water storage area 10 increase or decrease in opposite directions. A water inlet pipe 15, a nitrogen regulating pipe 16, and a vent pipe 7 are disposed at the top of the outer casing. A water outlet pipe 13 and a vent pipe 14 are disposed sequentially from top to bottom at the bottom of the outer casing. The water outlet pipe 13, the vent pipe 14, the water inlet pipe 15, and the nitrogen regulating pipe 16 are all connected to the water storage area 10, and the vent pipe 7 is connected to the pressure regulating area 11.

[0029] The portable high-purity water filling and preservation device has an outer casing made of FRP material. Accessories on the outer casing include a nitrogen regulating valve 1, which connects to a nitrogen source to add nitrogen into the water storage area 10 of the outer casing. Since nitrogen density is less than air density, air is discharged through a nitrogen outlet valve 3. A nitrogen detection device 4 is installed at the outlet of the nitrogen outlet valve 3. When the nitrogen detection device 4 detects continuous nitrogen overflow from the nitrogen outlet valve 3, it indicates that the water storage area 10 is full of nitrogen. The water storage area 10 is connected to a high-purity water inlet pipe 15, which has a rubber soft plug interface 5 at its end to prevent air from entering when connecting the inlet pipe 15. A high-purity water inlet valve 6 is installed at the high-purity water inlet. A high-purity water outlet valve 2 is also installed at the high-purity water outlet. A vent pipe 7 is located above the pressure regulating area 11, connecting to the outside to ensure pressure balance inside and outside the device. The outer casing is internally composed of a partition 9 and a telescopic diaphragm 8. The telescopic diaphragm 8 is fixedly connected to the partition assembly, dividing the outer casing's containment space into a water storage area 10 and a pressure regulating area 11. The telescopic diaphragm 8 regulates the pressure within the regulating area by extending and retracting. The partition 9 is connected to the telescopic diaphragm 8, while simultaneously isolating the diaphragm from contact with high-purity water to prevent contamination. The partition 9 is made of clean-PVC, ensuring it will not contaminate the water quality upon contact with high-purity water. Working principle and process: Before water inlet: The nitrogen source is connected to the nitrogen regulating valve 1. When the nitrogen outlet valve 3 detects continuous nitrogen overflow, it indicates that the water storage area 10 is full of nitrogen. Turn on the nitrogen source and close the nitrogen outlet valve 3 to prepare for water intake. During water intake: connect the rubber soft plug interface 5 to the high-purity water outlet pipe 13, open the high-purity water inlet valve 6, and the high-purity water enters the water storage tank. At the same time, under pressure, some of the nitrogen in the water storage tank is discharged from the nitrogen regulating valve 1. After the water reaches a certain level, stop water intake and close the high-purity water inlet valve 6 and the nitrogen regulating valve 1. During water discharge: open the high-purity water outlet valve 2. Under atmospheric pressure, the diaphragm 8 of the pressure regulating area 11 will extend, increasing the volume of the pressure regulating tank, and the high-purity water will be discharged under pressure. Throughout the process, the high-purity water only comes into contact with nitrogen, reducing air pollution and ensuring the quality of the high-purity water.

[0030] The partition assembly includes a partition 9, which is folded. The front, rear, and bottom sides of the partition 9 are fixedly connected to the inner wall of the outer casing. The top of the partition 9 is spaced apart from the top wall of the inner side of the outer casing. The inner wall of the outer casing has a high liquid level indicator 12. The height of the top of the partition 9 is not lower than the height of the high liquid level indicator 12. The top of the telescopic diaphragm 8 is fixedly connected to the top wall of the inner side of the outer casing.

[0031] The partition 9 includes a first vertical plate 18 and a second vertical plate 19 arranged vertically from top to bottom. A horizontal plate 20 is arranged between the first vertical plate 18 and the second vertical plate 19. The first vertical plate 18 and the second vertical plate 19 are respectively arranged on both sides of the horizontal plate 20. The telescopic diaphragm 8 is arranged on the side of the horizontal plate 20 that is flush with the second vertical plate 19. The telescopic diaphragm 8 extends and retracts to the left and right in the horizontal direction of the width of the horizontal plate 20. The partition assembly also includes a horizontal frame 21 fixedly arranged on the top wall of the outer box and the horizontal plate 20. Vertical frames 22 are fixedly arranged on the front and rear sides of the inner wall of the outer box. The horizontal frame 21 and the vertical frame 22 are integrally connected to form a square mounting frame 23. The mounting frame 23 is spaced apart from the surface of the first vertical plate 18. The telescopic diaphragm 8 is fixedly arranged inside the mounting frame 23. The periphery of the telescopic diaphragm 8 is integrally provided with a protrusion 24, which is located inside the mounting frame 23. A sealing gasket 17 is fixedly provided between the protrusion 24 and the periphery of the telescopic diaphragm 8, and the sealing gasket 17 abuts against the surface of the mounting frame 23.

[0032] After prolonged use of the device, the telescopic diaphragm 8 may lose its elasticity, so it needs to be replaced. To do this, simply remove the telescopic diaphragm 8 from the mounting frame 23 and then install a new telescopic diaphragm 8 into the mounting frame 23 to complete the assembly of the telescopic diaphragm 8, thus completing the replacement process of the telescopic diaphragm 8.

[0033] A high-purity water filling, preservation device and method, employing a portable high-purity water filling, preservation device, wherein a high-purity water inlet valve 6 is fixedly installed on the water inlet pipe 15, a nitrogen regulating valve 1 is fixedly installed on the nitrogen regulating pipe 16, a high-purity water outlet valve 2 is fixedly installed on the water outlet pipe 13, a nitrogen outlet valve 3 is fixedly installed on the gas outlet pipe 14, and a nitrogen detection device 4 is installed at the nitrogen regulating pipe 16, characterized in that it includes:

[0034] Step 1: Fill the water storage area with nitrogen;

[0035] Step 2: Replenish the nitrogen-filled water storage area 10 with high-purity water;

[0036] Step 3: The pressure regulating area 11 becomes larger and the water storage area 10 becomes smaller to extract high-purity water.

[0037] In the first step, the nitrogen regulating pipe 16 is connected to the nitrogen source, the nitrogen outlet valve 3 is opened, and the water storage area 10 of the external box is filled with nitrogen. When the nitrogen detection device 4 detects that nitrogen is continuously overflowing from the nitrogen outlet valve 3, the nitrogen source is turned off and the nitrogen outlet valve 3 is turned off.

[0038] In the second step, the inlet pipe 15 is connected to the outlet of the high-purity water equipment, and the high-purity water inlet valve 6 is opened. High-purity water enters the water storage area 10 from the outer box, and excess nitrogen in the outer box overflows from the nitrogen regulating valve 1.

[0039] In the second step, the water level should not exceed the height of the high level indicator 12. After the water intake is completed, close the high-purity water inlet valve 6 and the nitrogen regulating valve 1.

[0040] In the third step, the high-purity water outlet valve 2 is opened, the pressure regulating area 11 is connected to the outside through the vent, the telescopic diaphragm 8 in the pressure regulating area 11 extends, the volume of the pressure regulating box increases, the volume of the water storage area 10 decreases, and the high-purity water is forced out from the high-purity water outlet valve 2.

[0041] Before water intake: Connect the nitrogen source to the nitrogen regulating valve 1, open the nitrogen outlet valve 3, and perform nitrogen filling operation. When the nitrogen detection device 4 detects that nitrogen is continuously overflowing from the nitrogen outlet valve 3, it indicates that the device is full of nitrogen. Disconnect the nitrogen source and close the nitrogen outlet valve 3.

[0042] When water is being introduced: Connect the rubber soft plug interface 5 to the outlet of the high-purity water equipment, open the high-purity water inlet valve 6, and the high-purity water enters the water storage tank. Excess nitrogen will overflow from the nitrogen regulating valve 1, ensuring that the high-purity water in the water storage tank only comes into contact with nitrogen. The water level should not exceed the height of the high level indicator 12. After the water is introduced, close the high-purity water inlet valve 6 and the nitrogen regulating valve 1.

[0043] When discharging water: Open the high-purity water outlet valve 2. Since the pressure regulating box has a vent hole connected to the outside, under the action of atmospheric pressure, the telescopic diaphragm 8 inside the pressure regulating box extends, the volume of the pressure regulating box increases, and the high-purity water is forced out from the high-purity water outlet valve 2. The above achieves the purpose of avoiding contact with air during the high-purity water packaging and transportation process of the present invention, thus ensuring that the water quality is not contaminated during the high-purity water packaging and transportation process.

[0044] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for packaging and preserving high-purity water, characterized in that, The device includes an outer casing with a storage space. Within the storage space of the outer casing, a partition assembly and a telescopic diaphragm are installed. The telescopic diaphragm is fixedly connected to the partition assembly, dividing the storage space of the outer casing into a water storage area and a pressure regulating area. The spatial areas of the pressure regulating area and the water storage area increase or decrease in opposite directions. The top of the outer casing is equipped with a water inlet pipe, a nitrogen regulating pipe, and a vent pipe. The lower part of the outer casing, from top to bottom, is equipped with a water outlet pipe and a vent pipe. The water outlet pipe, vent pipe, water inlet pipe, and nitrogen regulating pipe are all connected to the water storage area, and the vent pipe is connected to the pressure regulating area. The partition assembly includes a partition plate, which is folded. The front, rear, and bottom sides of the partition plate are fixedly connected to the inner wall of the outer housing. The top of the partition plate is spaced apart from the top wall of the inner side of the outer housing. The inner wall of the outer housing has a high liquid level indicator. The height of the top of the partition plate is not lower than the height of the high liquid level indicator. The top of the telescopic diaphragm is fixedly connected to the top wall of the inner side of the outer housing. The partition includes a first vertical plate and a second vertical plate arranged vertically from top to bottom. A horizontal plate is arranged between the first vertical plate and the second vertical plate. The first vertical plate and the second vertical plate are respectively arranged on both sides of the horizontal plate. The telescopic diaphragm is arranged on the side of the horizontal plate that is flush with the second vertical plate. The area of ​​the telescopic diaphragm that can extend and retract to the left and right is the area in the horizontal direction where the width of the horizontal plate is located. The partition assembly also includes a horizontal frame fixedly installed on the top wall and horizontal plate of the outer box, and vertical frames fixedly installed on the front and rear sides of the inner wall of the outer box. The horizontal frame and vertical frame are integrally connected to form a square mounting frame. The mounting frame is spaced apart from the surface of the first vertical plate, and the telescopic diaphragm is fixedly installed inside the mounting frame.

2. The high-purity water dispensing and preservation device according to claim 1, characterized in that, The periphery of the telescopic diaphragm is integrally provided with a protrusion, which is located inside the mounting frame. A sealing gasket is fixedly provided between the protrusion and the periphery of the telescopic diaphragm, and the sealing gasket abuts against the surface of the mounting frame.

3. A method for dispensing and preserving high-purity water, employing the high-purity water dispensing and preservation device as described in any one of claims 1 to 2, wherein a high-purity water inlet valve is fixedly installed on the water inlet pipe, a nitrogen regulating valve is fixedly installed on the nitrogen regulating pipe, a high-purity water outlet valve is fixedly installed on the water outlet pipe, a nitrogen outlet valve is fixedly installed on the gas outlet pipe, and a nitrogen detection device is installed at the nitrogen regulating pipe, characterized in that... include: Step 1: Fill the water storage area with nitrogen; Step 2: Replenish the nitrogen-filled water storage area with high-purity water; Step 3: The pressure regulating area becomes larger and the water storage area becomes smaller to obtain high-purity water.

4. The method for packaging and preserving high-purity water according to claim 3, characterized in that, In the first step, the nitrogen regulating pipeline is connected to the nitrogen source, the nitrogen outlet valve is opened, and nitrogen is filled into the water storage area of ​​the external box. When the nitrogen detection device detects that nitrogen is continuously overflowing from the nitrogen outlet valve, the nitrogen source and the nitrogen outlet valve are closed.

5. The method for packaging and preserving high-purity water according to claim 4, characterized in that, In the second step, the inlet pipe is connected to the outlet of the high-purity water equipment, the high-purity water inlet valve is opened, and high-purity water enters the water storage area from the outer box. Excess nitrogen in the outer box overflows from the nitrogen regulating valve.

6. The method for packaging and preserving high-purity water according to claim 5, characterized in that, In the second step, the water level should not exceed the height indicated by the high water level indicator. After the water intake is completed, close the high-purity water inlet valve and the nitrogen regulating valve.

7. The method for packaging and preserving high-purity water according to claim 6, characterized in that, In the third step, the high-purity water outlet valve is opened, and the pressure regulating area is connected to the outside through the vent. The telescopic diaphragm in the pressure regulating area extends, the volume of the pressure regulating box increases, and the volume of the water storage area decreases, thus forcing high-purity water out from the high-purity water outlet valve.

Citation Information

Patent Citations

  • Pure water box seal device

    CN101086169A

  • Water storage device capable of isolating air with pure water

    CN2697160Y