JPH0525754Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a water purifier, and particularly to a water purifier having a drain valve for preventing tap water from stagnation inside the water purifier.

(Prior art) As a conventional water purifier, water purifier 1 shown in Fig. 5 is used.
There is 00. The water purifier 100 includes, for example, an adsorbent layer 101 such as activated carbon for removing organic substances such as residual chlorine, which causes a chlorine odor, and diosmin, which causes a mold odor, contained in tap water, and 2-methylisoborneol. and a membrane module 102 for removing germs and the like that have grown on the adsorbent layer 101. That is, this prevents bacteria and the like that have grown in the adsorbent layer 101 while the water purifier 100 is not in use from being mixed into the filtered water at the initial stage of water flow.

On the other hand, when such a membrane module 102 is used, the substances removed by the membrane module 102 gradually accumulate on the membrane surface, and the water flow resistance of the membrane module 102 increases due to clogging of the membrane, and the desired result is not achieved. Since a flow rate cannot be obtained, it is necessary to fill the membrane module 102 with a large amount of hollow fiber membranes in advance. Furthermore, if there are many fine particles such as rust in tap water, the life of the membrane module 102 will be significantly reduced.

Therefore, a cleaning means for cleaning the membrane module 102 is provided in the water purifier. That is, as shown in FIG. 5, the water purifier 100 includes filtration system waterways 103 and 112 that pass raw tap water through an adsorbent layer 101 and a membrane module 102 in order to filter it.
and a cleaning water channel 113 for cleaning the surface of the membrane module 102. The water that has passed through both channels is discharged from an outlet 110. on the other hand,
The water purifier is provided with a switching valve 114 for switching the flow path of tap water between a filtration system waterway 103 and a cleaning system waterway 104.

FIG. 6 shows a specific configuration of the water purifier 100. In the figure, the same elements as shown in FIG. The membrane module 102 is inserted into the housing 102 through a cylindrical partition wall 121 having a cylindrical shape, and an adsorbent layer is inserted into the water passage 103 formed between the partition wall 121 and the housing 120 so as to surround the membrane module 102. 101
is installed. On the other hand, this membrane module 10
A valve 130 is disposed below 2, that is, at the bottom of the housing 120, and a switching valve 114 held by a lid 122 that closes the opening of the housing 120 is disposed above the membrane module 102. . This switching valve 114 is configured to switch the flow path by rotating a switching lever 114a.

(Problem to be solved by the invention) However, in the conventional water purifier, the water purifier 10
0 Enters through the valve 130 at the bottom and exits through the valve 11 at the top
In this structure, if the water purifier 100 is not used for a long period of time, bacteria will grow in the water that remains inside the water purifier 100, causing a hygiene problem.

The present invention was made in order to solve the problems of the prior art described above, and its purpose is to prevent water from stagnation inside the water purifier and provide a water purifier that is improved from a sanitary standpoint. To provide a water purifier which is convenient to use by automatically discharging the water inside the water purifier at the same time, and which prevents leakage from the water drain valve by surely closing the water drain valve when the water purifier is used. It is in.

(Means for Solving the Problems) In order to achieve the above object, the present invention has an adsorbent layer that removes off-flavors contained in tap water and a membrane module that removes bacteria. death,
In a water purifier equipped with a filtration system waterway that sequentially passes raw tap water through the adsorbent layer and membrane module for filtration, a drain valve is provided inside the water purifier to prevent tap water from stagnation, and the water The drain valve includes a water drain passage provided in communication with the inside of the water purifier, a valve member for opening and closing the water drain passage, and a direction in which the valve member is separated from the water drain passage to open the water drain passage. and a diaphragm which is a pressure receiving part attached to the side of the valve member that receives the water pressure inside the water purifier, and the diaphragm acts at a position opposite to the urging means by the diaphragm. , forming a pressure receiving chamber that communicates with the inside of the water purifier to transmit water pressure inside the water purifier, and that uses the water pressure to move the valve member in the valve closing direction against the urging force of the urging means; The pressure receiving area of the diaphragm facing the pressure receiving chamber is larger than the pressure receiving area of the valve member facing the water drainage passage.

(Function) According to the water purifier of the present invention, a drain valve is provided inside the water purifier. When the water purifier is in use, the pressure inside the water purifier increases, so that pressure is applied to the diaphragm, which has a larger pressure receiving area than the pressure receiving area facing the water drainage passage of the valve member, which is installed on the side of the valve member that receives water pressure. As a result, the force acting on the valve member increases, and the valve member resists the urging force of the urging means through the diaphragm and reliably closes the drain passage, preventing tap water from leaking to the outside. It's becoming like that. When tap water is not used, the pressure inside the water purifier is low, so a predetermined water pressure is not applied to the pressure receiving part, and the valve member is separated from the water drain passage by the urging force of the urging means, and the water drain passage is opened. Therefore, the tap water inside the water purifier does not flow out from the water drain passage and stay inside the water purifier.

Therefore, bacteria do not propagate in the accumulated tap water, and the water purifier is improved from a hygienic standpoint, and the tap water is automatically discharged, making it easier to use.

(Example) A description will be given below based on this example. FIG. 4 shows a schematic configuration of a water purifier according to an embodiment of the present invention. In the figure, a pipe 2 connected to a water faucet 1 is connected to a switching valve 3, and pipes 4 and 5 are led out from the switching valve 3, and one pipe 5 is connected to a water purifier A according to the present invention. has been done. In the water purifier A, 6 is a valve connected to the pipe 5. A water passage 7 leads out from the valve 6, and an adsorbent layer 9 is interposed in the middle of the water passage 7. The water channel 7 is connected to a membrane module 11 composed of a large number of hollow fiber membranes 10 (see FIG. 2). Two water passages 12 and 13 are led out from the membrane module 11, and these water passages 12 and 13 are connected to a switching valve 14 with a safety valve mechanism. is derived. The water passages 7 and 12 to which the adsorbent layer 9 and membrane module 11 are connected constitute a filtration system waterway B, and the water passage 13 constitute a cleaning system waterway C.

FIG. 3 shows the specific configuration of the water purifier A. In the figure, the same elements as shown in FIG. The membrane module 11 is inserted into the housing 20 through a cylindrical partition wall 21 having a cylindrical shape, and a water passage 7 is formed between the partition wall 21 and a bottom wall 21a disposed below the partition wall 21.
An adsorbent layer 9 is disposed to surround the membrane module 11. On the other hand, a valve 6 is disposed below the membrane module 11, that is, at the bottom of the housing 20, and a lid 22 is disposed above the membrane module 11 to close the opening of the housing 20.
A switching valve 14 is provided which is held in place.
This switching valve 14 is designed to switch the flow path by rotating a switching lever 32a.

The switching valve 14 generally includes a valve member 32 rotatably mounted within the lid body 31 and a switching lever 32a for rotating the valve member 32. Further, the bottom wall 21a of the housing 20 is provided with a drain valve 40 according to the present invention. Detailed views of the drain valve 40 are shown in FIGS. 1 and 2. The drain valve 40 is attached to fit into a hole 42 formed at the bottom of the housing 20. The drain 40 has a convex portion 43 in the center and an upper portion 45 in which a recess 44 is formed. Also provided below the upper part 45 is a lower part 48 having a recess 47 which together with the recess 44 of the upper part 45 forms a chamber 46 . A valve 50 as a valve member is disposed within the chamber 46 and is biased downward by a spring 49 as biasing means.
A passage 53 and a discharge port 54 are connected to the interior of the water purifier through contact between the side surface 51 of the 0 and the sealing member 52 attached to the upper part 45.
It is becoming easier to communicate with and close them. and,
Since the spring 49 is biased downward, its biasing force moves the valve 50 away from the passage 53 to open the passage. The control of the valve 50 is performed by the movement of a diaphragm 55, which serves as a pressure receiving part and has a pressure receiving area larger than the pressure receiving area facing the passage 53 of the valve 50, which is fixed by a fixture 54a below the valve 50. . The diaphragm 55 divides the chamber 46 into an upper chamber 55a and a pressure receiving chamber 55b. A communication hole 56 communicating with the inside of the water purifier is provided in the pressure receiving chamber 55b.

In water purifier A with the above configuration, when using raw water, operate the switching valve 3 as shown in Figure 4A to direct the tap water flowing out from the water faucet 1 to the pipe 4 side. Bye.

During filtration, the valve member 32 is switched to the filtration position as shown in FIG. 4B, and each seal ball 32d is
The water passages 13, 1 which constitute the cleaning system water channel C by
Close 3. Therefore, the water that has sequentially passed through the adsorbent layer 9 and the hollow membrane module 11 flows through the water passage 1.
2 and exits from outlet 16. Here, the hollow membrane module 11 becomes clogged and the water purifier A
When the water pressure inside rises and becomes higher than the valve opening pressure of the seal ball 32d, the seal ball 32d moves upward against the biasing force of the spring 32b, as shown in FIG. It opens and water pressure is released to the cleaning system waterway C.

Also, since the pressure inside the water purifier increases due to the flow of water in the water purifier, the water pressure is transmitted to the pressure receiving chamber 55b through the communication hole 56 of the water drain valve 40, and the diaphragm resists the biasing force of the spring 49. 5
5 rises due to water pressure. As the diaphragm 55 rises, the side surface 51 of the valve 50 comes into contact with the sealing member 52, and the passage 53 and the outlet 54 are cut off, and the water flowing inside the water purifier does not flow out to the outside (Fig. 2). reference). Further, a diaphragm 55 having a larger pressure receiving area than the pressure receiving area of the valve 50 facing the passage 53 on the side receiving the water pressure inside the water purifier of the valve 50.
Because of this provision, when the diaphragm 55 receives water pressure inside the water purifier, the force acting on the valve 50 increases and the valve is reliably closed. Therefore, even if there is a pressure fluctuation inside the water purifier, the valve 50 will not separate from the sealing member 52, and no water leakage will occur.

During flushing, the valve member 32 is switched to the flushing position by rotating the switching lever 32a as shown in FIG. 4C. Then, the water passages 13, 13 constituting the cleaning water channel C are opened, the water flow resistance is reduced, and the water that has passed through the adsorbent layer 9 flows vigorously over the surface of the hollow membrane module 11 and is cleaned.

Also in this case, the communication hole 5 of the drain valve 40
6, water pressure is transmitted to the pressure receiving chamber 55b,
The diaphragm 5 resists the biasing force of the spring 49.
5 rises due to water pressure. As the diaphragm 55 rises, the side surface 51 of the valve 50 comes into contact with the sealing member 52 and is blocked between the passage 53 and the discharge port 54.
The water flowing inside the water purifier A does not flow to the outside (see Figure 2).

When the water purifier A is not in use, water does not flow into the water purifier A and no water pressure is generated. Therefore, pressure is not transmitted through the communication hole 56, and the valve 50
is urged downward by the spring 49, so the passage 53 and the discharge port 54 are in communication with each other, and the water that flows through the water purifier during filtration and flushing, and then drains the water remaining on the bottom wall 21a to the passage 5.
3. Discharge to the outside via the discharge port 54 (see Fig. 1).

(Effects of the invention) According to the invention, tap water has an adsorbent layer that removes off-flavors and odors contained in tap water, and a membrane module that removes bacteria. A water purifier is equipped with a filtration system waterway that sequentially passes water through the water for filtration, and a water drain valve is provided inside the water purifier to prevent tap water from stagnation when not in use. a passage, a valve member for opening and closing the water drainage passage, a biasing means for separating the valve member from the water drainage passage and urging the valve member in a direction to open the water drainage passage, and a water pressure inside the water purifier of the valve member. a diaphragm which is a pressure receiving part attached to the receiving side, and the diaphragm communicates with the inside of the water purifier at a position opposite to the urging means to transmit the water pressure inside the water purifier, and the water pressure inside the water purifier is transmitted. A pressure receiving chamber is formed in which the valve member is moved in the valve closing direction against the urging force of the urging means, and the pressure receiving area of the diaphragm facing the pressure receiving chamber is reduced to the pressure receiving area of the diaphragm facing the water drainage passage. Since the area is larger than the pressure receiving area of the member, when the water purifier is not in use, the water pressure inside the water purifier will be low, and the prescribed water pressure will not be applied to the diaphragm, so the water drainage passage will be opened by the urging force of the urging means. The water that has accumulated inside the water purifier will be discharged to the outside. Therefore, it is possible to prevent water from remaining inside the water purifier while the water purifier is not in use, which is improved from a sanitary standpoint, and at the same time, the water is automatically discharged, thereby improving usability. In addition, a diaphragm with a pressure receiving area larger than the pressure receiving area of the valve member facing the water drainage passage is installed on the side of the valve member that receives water pressure inside the water purifier, so when the diaphragm receives water pressure inside the water purifier, , the force acting on the valve member increases. Therefore, even if there is a pressure fluctuation inside the water purifier when the water purifier is in use, the valve will not open due to the pressure fluctuation and will be reliably closed, and no leakage will occur from the drain valve.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of the first embodiment of the drain valve attached to the water purifier of the present invention, Figure 2 is a vertical sectional view of the drain valve when the water purifier is used, and Figure 3 is A vertical cross-sectional view of the water purifier showing the mounting position of the drain valve of the first embodiment, Figure 4 A, B, and C are schematic diagrams of the water purifier, and Figure 5 is a schematic diagram of the conventional water purifier. , FIG. 6 is a longitudinal sectional view of a conventional water purifier. Explanation of symbols, 1...Water faucet, 3...Switching valve, 6...Valve, 7...Water passage, 9...Adsorbent layer, 10...Hollow system membrane, 11...Membrane module,
12... Water channel (filtration system water channel), 13... Water channel (cleaning system water channel), 40... Drain valve, 49, 60...
... Spring (biasing means), 50 ... Valve (valve member), 53 ... Passage (draining passage), 55 ... Diaphragm (pressure receiving part), 61 ... Valve plate (valve member), 61A ... End (pressure receiving part).

Claims (1)

[Claims for Utility Model Registration] It has an adsorbent layer that removes off-flavors and odors contained in water supply, and a membrane module that removes bacteria, and raw tap water passes through the adsorption layer and membrane module in sequence. In a water purifier equipped with a filtration system waterway for filtering water, a water drain valve is provided inside the water purifier to prevent tap water from stagnation, and the water drain valve is provided in communication with the inside of the water purifier. a passage, a valve member for opening and closing the water drainage passage, a biasing means for urging the valve member away from the water drainage passage in a direction to open the water drainage passage, and the water purifier of the valve member. A diaphragm which is a pressure receiving part attached to the side that receives internal water pressure,
The diaphragm communicates with the inside of the water purifier at a position opposite to the urging means to transmit the water pressure inside the water purifier, and the water pressure resists the urging force of the urging means. to form a pressure receiving chamber for moving the valve member in the valve closing direction, and the pressure receiving area of the diaphragm facing the pressure receiving chamber is made larger than the pressure receiving area of the valve member facing the water drainage passage. Water purifier.