JPH0721975Y2 - Safety valve for water purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a water purifier used, for example, in domestic water supply, and more particularly to the structure of its safety valve.

(Prior Art) Conventionally, a water channel structure of this type of water purifier is, for example, as shown in FIG. That is, 100 is a water purifier, connected to the tap 102 of the water supply through the pipe 101,
The raw water of the tap water is filtered by the filtering means 103 in the water purifier 100, and the purified water flows out from the outlet nozzle 104.

And the connection pipe 10 between the water purifier 100 and the tap 102
A safety valve 105 is provided on the way to release the water pressure when the water pressure inside the water purifier 100 becomes excessive due to clogging of the filtering means 103 or the like.

In addition, a water drain valve 106 for draining water accumulated in the water purifier 100 was provided at the bottom of the water purifier 100.

(Problems to be solved by the invention) However, in the case of the above-mentioned conventional technique, the safety valve 105
The water drain valve 106 and the water drain valve 106 are separate parts, and when mounted on the water purifier 100, a considerable space is required. Particularly, in the case of the water purifier 100 for general household use, it is required to save space because it is attached to the sink, and it is necessary to improve space efficiency.

In addition, the drain pipe 107 has two ports for the drain valve 106 and the safety valve 105.
This is necessary, the number of parts increases and the water purifier 100
At the time of mounting, the arrangement of the drainage pipes 107, 107 must be taken into consideration, and there is a problem that there are many restrictions on handling.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a safety valve for a water purifier that can be integrated by incorporating a drain valve into the safety valve to improve space efficiency. It is in.

(Means for Solving the Problem) In order to achieve the above object, in the present invention, the pressure release port communicating with the inner water passage of the water purifier is always kept closed by the valve body, In a water purifier safety valve in which the valve body moves in the valve opening direction to release the pressure when the water pressure exceeds a predetermined pressure, the valve body is held by a retainer, and a hollow drainage chamber is provided between the valve body and the retainer. Formed,
The valve body is provided with a passage that allows the pressure release port and the water draining chamber to communicate with each other in a closed state, the retainer has an inner bottom surface formed like a skirt, and a water draining port for draining water is provided at the bottom. Made of a flexible sheet material that is inserted loosely into the inside and has a diameter larger than the diameter of the water draining port, and has an outer edge provided with a protruding piece that protrudes outward in the radial direction. The feature is that a drain valve is provided.

(Operation) In the water purifier safety valve having the above configuration, at the time of filtration, the water pressure introduced into the water drainage chamber through the passage provided in the valve body causes the water drainage valve to operate and close the water drainage port.
The pressure relief port is kept completely closed.

When the water pressure in the water purifier reaches a predetermined pressure, the valve body moves to open the pressure release port, and the water pressure is released.

Also, when water cannot pass through the water purifier, the water drain valve becomes unloaded and the water drain valve opens, and although the pressure relief port is blocked by the valve body, the water drain valve opens the inside of the water purifier. The accumulated water is drained.

(Example) Below, this invention is demonstrated based on the Example shown in figure. First
FIG. 5 to FIG. 5 show a safety valve for a water purifier according to an embodiment of the present invention. The safety valve 1 includes a hollow inner valve box 2 and
The valve body 4 includes a valve body 4 housed in a valve chamber 3 formed inside the hollow of the valve body 2 and a spring member 8 that biases the valve body 4 in one direction.

The valve box 2 is a cylindrical member whose upper and lower ends are closed, and an annular mounting flange 23 projecting outward in the radial direction projects on the outer periphery of the intermediate position in the axial direction. A screw portion 22 is provided on the outer periphery of the upper half portion with the mounting flange 23 as a boundary, and is screwed and fixed in a mounting hole 50a provided in the inner wall 50 of the water purifier 5. A sealing member such as an O-ring 50b is interposed between the contact surfaces of the mounting flange 23 and the inner wall 50 of the water purifier.

Further, a pressure release port 6 is formed in the center of the upper end wall 24 of the valve box 2, a drain port 7 is opened in the center of the lower end wall 25, and a drain pipe 17 is connected. This drain port 7
A spring seat 81 with which one end of the spring member 8 is engaged is provided around the opening on the valve chamber side.

The valve body 4 is made of a rubber-like elastic body, and the valve head 41 is formed in a spherical shape. The valve body 4 is water-tightly pressed against a seat surface provided at the opening edge of the pressure release port 6 and is kept in a normally closed state. There is.

On the other hand, the body portion 42 of the valve body 4 is held by the retainer 9, and the upper end of the spring member 8 is engaged with the retainer 9. The retainer 9 has a bottomed cylindrical shape, and a valve body 42 is watertightly fitted in an upper opening of the retainer 9, and a hollow drainage chamber 10 is formed between the valve body 4 and the retainer 9.

Further, the valve body 4 has a passage extending from the valve head 41 to the body 42.
11 is bored, and the pressure release port 6 and the drainage chamber 10 are communicated with each other through the passage 11.

On the other hand, the bottom wall 91 of the retainer 9 is formed with a water draining port 12 at the center thereof, and the water draining port 12 opens into the valve chamber 3 of the valve box 2. Also, the bottom surface 14 of the drainage chamber 10
It is inclined toward the water draining port 12 in the shape of a hammer and is configured to concentrate the water in the water draining chamber 10 on the water draining port 12.

Inside the water draining chamber 10, a rubber sheet 13 as a flexible sheet material is provided as a water draining valve that keeps the water draining port 12 always open. The rubber sheet 13 is inserted into the retainer 9 in a loosely fitted state, as shown in FIGS. 4 and 5.

The rubber sheet 13 has a diameter larger than the diameter of the water draining port 12, and the outer edge of the rubber sheet 13 is provided with a plurality of protruding pieces 15 that protrude outward in the radial direction. In the free state, the tips of the projecting pieces 15 are in contact with the upper slopes of the bottom surface 14 having the shape of a brim by its own weight, and a gap 16 between the projecting pieces 15 adjacent to each other is provided.
Water is allowed to pass through. The gap 16 between the projecting pieces 15 keeps the drainage port 12 in an open state.

Then, the water pressure introduced into the water draining chamber 10 causes the rubber sheet 13 to bend in a direction of closing the water draining port 12, and when the pressure exceeds a predetermined pressure, the water draining port 12 is closed. The valve closing pressure of the water draining port 12 is set to such a degree that it is normally blocked by the water pressure during filtration, and is a value smaller than the valve opening setting pressure of the pressure releasing port 6.

6 and 7 show a water channel structure of the water purifier 5 to which the safety valve 1 is attached. The water purifier 5 is provided with a filter means 53 including an adsorbent layer 51 such as activated carbon and a membrane module 52 such as a hollow membrane, and the safety valve 1 of the present invention is provided upstream thereof. The position of the safety valve 1 is the adsorbent layer 51.
It may be arranged between the membrane module 52 and the membrane module 52.
Further, on the upstream side of the safety valve 1, for example, a water shutoff valve 54, a check valve 55 and a metering valve 56 are arranged to control the water flow to the filtering means 53.

The safety valve 1 may be integrated with the water purifier 5, or as a separate body from the water purifier 5, a conduit between the water faucet 57 and the water purifier 5.
It may be provided at 58. When it is provided in the pipe, it may be bent at a lowermost position, for example, in a U shape so that the accumulated water in the water purifier 5 flows back into the pipe when draining water.

The safety valve for a water purifier having the above structure operates as follows.

First, when the water is drained, as shown in FIG. 1, the pressure release port 6 is always closed by the spring member 8 because no water pressure is applied to the water purifier 5 when water is not passed through the water purifier 5. Kept in. On the other hand, no water pressure is applied to the rubber sheet 13 in the water draining chamber 10 and the rubber sheet 13 is in an unloaded state, so that the shape of the rubber sheet 13 is maintained in a flat state. Therefore, the water remaining in the water purifier 5 flows into the drainage chamber 10 through the passage 11 of the valve body 4 and drains through the gap 16 around the rubber sheet 13 as shown by the arrow in the figure. The water flows along the inclined surface of the bottom surface 14 of the chamber 10 to the drainage port 12 and
Flows into the valve chamber 3 and is discharged from the drain port 7 provided in the lower end wall 25 of the valve box 2.

Next, the normal filtration will be explained. As shown in FIG. 2, the water pressure in the water purifier 5 rises when water is passed through the water purifier 5, and at the same time, the water pressure in the water purifier 5 passes through the passage 11 of the valve body 4. The water pressure in the water draining chamber 10 communicating with the water pressure chamber rises, and the water pressure presses the rubber sheet 13 in the direction of closing the water draining port 12. Due to this pressure, the central portion of the rubber sheet 13 bends like a skirt following the shape of the bottom surface 14 of the drainage chamber,
The bottom surface 14 is watertightly pressed to close the drain port 12. On the other hand, the pressure release port 6 is maintained in the closed state under the pressure during normal filtration. As a result, the safety valve 1 will not leak water during filtration.

Further, when the inner pressure of the water purifier 5 becomes excessive due to clogging of the filtration membrane and exceeds a predetermined pressure, the spring member 8 is pushed down to open the pressure release port 6 as shown in FIG. Water pressure is released through the drain pipe 17 to prevent damage to the water purifier and the pipeline.

(Effects of the Invention) The present invention has the above-described configuration and operation. Since the water valve which is always open is incorporated in the valve body that keeps the pressure release port always closed, when the water purifier is not used, Even if the pressure release port is closed, water can be drained through the water drain valve, and while the water purifier is in use, the water drain valve is blocked by the pressure and functions as a normal safety valve. It can be drained and protected. Therefore, the number of parts can be reduced, and the size and weight can be reduced and the space efficiency can be improved. Further, since the water drain valve is made of a flexible sheet material, it has an extremely good responsiveness to changes in the flow rate and pressure of water and operates reliably. Furthermore, the safety valve and the drainage pipe for draining water can also be used, which makes the handling extremely easy.

[Brief description of drawings]

1 to 3 show a safety valve for a water purifier according to an embodiment of the present invention. FIG. 1 is a vertical sectional view in an unloaded state, FIG. 2 is a vertical sectional view during filtration, and FIG. Is a longitudinal sectional view at the time of pressure release under high pressure, FIG. 4 is a plan view of the rubber sheet portion of FIG. 1,
5 is an enlarged perspective view of the rubber sheet of FIG. 4, FIG. 6 is a water channel diagram of the water purifier with the safety valve of FIG. 1, and FIG.
FIG. 8 is a flow chart showing the flow of water in the water purifier shown in FIG. 8, and FIG. 8 is a diagram showing the water channel structure of a conventional water purifier. Explanation of symbols 1 …… Safety valve, 2 …… Valve box 23 …… Mounting flange, 24 …… Upper edge 25 …… Lower end wall, 3 …… Valve chamber 4 …… Valve element, 41 …… Valve head 5 …… Water purifier, 6 ... Pressure release port 7 ... Drain port, 8 ... Spring member 9 ... Retainer, 91 ... Bottom wall 10 ... Drainage chamber, 11 ... Passage 12 ... Drainage port 13 ... Rubber sheet (water drain valve) 14 ... Bottom of water drain chamber

Claims (1)

[Scope of utility model registration request] 1. A pressure release port communicating with an inner waterway of a water purifier is always kept closed by a valve body, and when the water pressure in the water purifier exceeds a predetermined pressure, the valve body moves in a valve opening direction to reduce the pressure. In the safety valve for a water purifier to be released, the valve body is held by a retainer, and a hollow drainage chamber is formed between the valve body and the retainer, and the valve body has a pressure release port in a closed state. A passage that allows the water draining chamber to communicate with each other is provided, and the retainer has an inner bottom surface formed like a skirt, and a water draining port for draining water is provided at the bottommost portion, and the retainer is inserted in a loosely fitted state inside the The drainage valve is made of a flexible sheet material and has a diameter larger than the diameter of the drainage port, and a protrusion piece protruding radially outward is provided on the outer edge of the drainage valve. Safety valve for water purifier.