JPH05608Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention prevents pressure rise due to expanding water in the water chamber in a hot and cold water mixing faucet that mixes hot water and discharges hot water at a desired temperature. The present invention relates to a technology that reduces the operability of a water volume adjustment handle and prevents damage to the valve body and faucet body.

[Conventional technology]

A conventional general hot water/cold water mixing faucet is shown in a partially sectional plan view of FIG. As shown in the figure, the conventional hot and cold water mixing faucet has a water chamber 2, a water chamber 3, and these chambers 2,
A mixing chamber (not shown) is formed which communicates with the water chamber 3 through a passage 4 (only the water chamber 3 side is shown in FIG. 2). A hot water amount adjustment handle 5 and a water amount adjustment handle 6 are attached to both ends of the faucet body 1, and between the hot water chamber 2 and the water chamber 3 and the passage 4, there are provided hot water flowing into the mixing chamber side. Opening/closing valves 7 (only the water chamber 3 side is shown in FIG. 2) are provided to respectively adjust the amount of water. The on-off valve 7 is composed of two fixed disc valve bodies 7a and a rotating disc valve body 7b made of ceramic or the like. are connected via.

Further, the hot water chamber 2 and the water chamber 3 are connected to a hot water supply pipe 11 and a water supply pipe 12 via a hot water introduction pipe 9 and a water introduction pipe 10, respectively. In FIG. 2, 13 and 14 are stop valves for hot water and cold water, respectively. A check valve 15 shown in FIG. 3 (only the water inlet pipe 10 side is shown in FIG. 3) is disposed between the water stop valves 13 and 14 and the hot water chamber 2 and water chamber 3. .

The amount of hot water and water supplied to the hot water chamber 2 and the water chamber 3 flowing into the mixing chamber is determined by the on-off valve 4, thereby mixing them into hot water at a desired temperature. The water is then discharged from a water spout (not shown) of the water spout 16.

[Problem that the invention attempts to solve]

Assuming that the conventional hot and cold mixing faucet configured as described above is currently being used by discharging only hot water continuously, the water chamber 3 is sealed by the check valve 15 and the on/off valve 7. It has become a state. When hot water continues to be discharged in this state, the water in the water chamber 3 is heated and expanded through the partition wall 17 that partitions the hot water chamber 2 and the water chamber 3, the peripheral wall of the faucet body 1, and the like. and,
This expanded water caused the pressure inside the water chamber 3 to rise, sometimes reaching 100Kg/ ^cm2 .
The fixed disc valve body 7a of the on-off valve 7 on the side of the water chamber 3 is firmly pressed against the rotary disc valve body 7b, resulting in a drawback that the flow rate operation by the water volume adjustment handle 6 is not smooth. There have also been some damage accidents, such as damage to the valve bodies 7a and 7b and cracks in the faucet body 1 due to abnormal pressure caused by the expanded water.

[Means for solving problems]

The present invention has been developed to improve and eliminate the above-mentioned problems of conventional hot and cold water mixing faucets. To provide a hot water mixing faucet which allows expanded water to flow out to the bath chamber side and prevents the pressure inside the water chamber from rising to abnormal pressure.

Therefore, the means adopted by the present invention to solve the above-mentioned problems is that in a hot water mixing faucet that mixes hot water and cold water and discharges hot water at a desired temperature, a hot water chamber and a water chamber are provided. A relief valve is provided on the partition wall that separates the water chamber from the water chamber to the hot water chamber.

[Effect]

When only hot water is being continuously discharged, the water in the water chamber is heated and expands, and the pressure in the water chamber begins to rise.The relief valve opens at a predetermined pressure, and the water chamber and hot water communicate with the room. Therefore, the expanded water in the water chamber flows out to the water chamber side, and the pressure in the water chamber does not become abnormally high.

〔Example〕

The configuration of the present invention will be explained below based on the embodiments shown in the drawings. Note that the same reference numerals as in the conventional case represent the same members.

FIG. 1 is a partially sectional plan view showing a hot water mixing faucet according to an embodiment of the present invention. As shown in the figure,
In this embodiment, a relief valve 20 is disposed on a partition wall 17 that partitions the hot water chamber 2 and the water chamber 3.
The relief valve 20 consists of a valve case 21 screwed onto a partition wall 17, a valve body 23 fitted into a communication hole 22 of the valve case 21, and a valve body 23 that is normally rotated in the seating direction (Fig. 1). Spring 2 that urges the
It consists of 4. 25 is a valve seat formed on the water chamber 2 side of the valve case 21. The pressure at which the relief valve 20 starts opening is determined by the spring 24
It can be freely set by changing the urging force of . The relief valve 20 may be mounted on the partition wall 17 by using the mounting holes of the water volume adjustment handle 6 and the on-off valve 7. In addition,
In FIG. 1, 26 indicates the partition wall 17 and the relief valve 2.
This is a gasket that is fitted and attached to the valve case 21 for sealing between the valve and the valve. Also, in the same figure,
27 is a nut portion formed on the outer peripheral surface of the water chamber 3 side of the valve case 21, and 28 is a nut portion that is fitted and attached to the valve body 23 for sealing between the valve body 23 and the valve seat 25 when the valve body 23 is seated. The seal 29 is a nut for mounting the spring 24 screwed onto the valve shaft 30.

Regarding the hot water mixing faucet configured in this way,
Assuming that only hot water is being continuously discharged and used, the water chamber 3 is closed by the check valve 15 and the on-off valve 7, as in the conventional case. Therefore, the water in the water chamber 3 is heated and expanded through the partition wall 17 and the peripheral wall of the faucet body 1, and the pressure in the water chamber 3 begins to rise. When the pressure inside the water chamber 3 reaches the set pressure at which the relief valve 20 starts opening, the valve body 23 moves to the left in FIG. 1 against the urging force of the spring 24, and the valve seat The hot water chamber 2 and the water chamber 3 are communicated with each other through a communication hole 22 apart from the water chamber 25. Therefore, the expanded water in the water chamber 3 flows out from the water chamber 3 to the water chamber 2 side through the communication hole 22 of the relief valve 20, and the pressure in the water chamber 3 becomes higher than the set pressure of the relief valve 20. prevent it from becoming When the pressure inside the water chamber 3 becomes lower than the set pressure of the relief valve 20 due to the outflow of the expanded water to the water chamber 2 side, the valve body 23 of the relief valve 20 is seated on the valve seat 25 by the biasing force of the spring 24. , closes the communication hole 22. Therefore, the pressure in the water chamber 3 is always kept below the set pressure of the relief valve 20, and never becomes abnormally high unlike a conventional hot water mixing faucet. Therefore, the fixed disc valve body 7a of the on-off valve 7 is not firmly pressed against the rotating disc valve body 7b,
Further, there is no accident such as damage to the valve bodies 7a, 7b and the faucet main body 1.

By the way, the present invention is not limited to the above-described embodiments, and can be modified as appropriate. For example, a two-handle mixer faucet is shown in which the hot water volume adjustment handle 5 and the water volume adjustment handle 6 are installed separately, but a single lever type that adjusts the flow rate of hot water and water with one handle is shown. It may be a formula. Further, the set pressure at which the relief valve 20 starts its opening operation, the shape and type of the relief valve 20 itself, etc. can be changed as appropriate.

[Effect of idea]

As explained above, in the case of the present invention, in the usage state where hot water is being continuously discharged,
When the water in the water chamber is heated and expanded and the pressure within the water chamber increases, a relief valve connects the water chamber and the hot water chamber at a predetermined pressure, causing the expanded water in the water chamber to flow out to the hot water chamber. Therefore, the pressure inside the water chamber is always maintained below the set pressure at which the relief valve starts opening. Therefore, there are no accidents such as the operation of the on-off valve becoming difficult or damage to the on-off valve itself or the faucet body.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional plan view showing the whole of a hot water mixing faucet according to an embodiment of the present invention, FIG. 2 is a partially sectional plan view showing the entire conventional hot water mixing faucet, and FIG. FIG. 3 is a rear cross-sectional view showing the mounting structure of the check valve in the hot water mixing faucet shown in the figure. 2... Bath room, 3... Water room, 17... Bulkhead, 20
...Relief valve.

Claims (1)

[Scope of utility model registration request] In a hot/cold mixing faucet that mixes hot water and discharges hot water at a desired temperature, expanded water flows out from the water chamber side to the bath chamber side through a partition wall that separates the hot water chamber and the water chamber. A hot water mixing faucet characterized by being equipped with a relief valve.