JPH05615Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" (Field of industrial application) The present invention maintains easy operability of the water flow rate adjustment handle even when discharging hot water continuously. The present invention relates to a new hot water mixing faucet that can also protect the faucet body.

(Conventional Hot and Cold Water Mixing Faucet) FIG. 3 is a partially cutaway plan view of a conventional hot and cold water mixing faucet. The hot water mixing faucet has a water flow rate adjustment handle 2 and a hot water flow rate adjustment handle 3 attached to both ends of a horizontally long faucet body 1, respectively. This type of hot water mixing faucet adjusts the amount of water and hot water mixed by rotating the flow rate adjustment handles 2 and 3 as shown by the two-dot chain lines, and adjusts the water temperature and discharge amount to the desired level. I'm starting to do that.
Of course, it is also possible to discharge only water or hot water by operating only one of the flow rate adjustment handles.

The inside of the faucet main body 1 is divided into a hot water chamber 6 and a water chamber 7 by a central partition 1a, and a mixing chamber (not shown) is defined below a bottom wall 1b spanning both chambers. There is. A hot water supply pipe 8 is connected to the hot water chamber 6 via a hot water supply port 6a of a hot water supply leg 6b, and a water supply pipe 9 is connected to the water chamber 7 via a water supply port 7a of a water supply leg 7b. is connected. Further, the front mixing chamber is in communication with the hot water chamber 6 and the water chamber 7, respectively, so that the supplied hot water and the supplied water join together. A water on-off valve 4 is provided in a compartment 1c between the water chamber 7 and the mixing chamber in the faucet body 1. The water on-off valve 4 includes a rotary disk 4b connected to the spindle 2a of the water flow rate adjustment handle 2, and a fixed disk 4a fixed to the faucet body 1. Although not shown in the drawings, each of these disks 4a, 4b has a water port formed through its joint surface. Therefore, when the two disks 4a, 4b are closely slid between their joint surfaces, the water ports match or separate from each other to perform the valve function.

(Problem to be solved by the invention) In a conventional hot and cold mixed faucet, the water chamber 7 in the faucet body 1 is connected to a check valve 5 provided in the water passage leg 7b.
(The mounting structure is shown in FIG. 4 as a rear sectional view of the water passage leg 7b) and the water on-off valve 4 form a sealed chamber. Therefore, when hot water is continuously discharged from this hot water mixing faucet, the central partition wall 1a
And due to heat transfer from the peripheral wall of the faucet body 1, the water chamber 7
The water inside heats up and expands. For this reason, the pressure inside the water chamber 7, which is a sealed chamber, increases, and the fixed disk 4a of the water on-off valve 4 is strongly pressed against the rotating disk 4b, making it extremely difficult to operate the water flow rate adjustment handle 2. Ta. In addition, the pressure value in the water chamber can sometimes reach 100Kg/ ^cm2 , and the pressure value in the faucet body 1
There was also a risk of it bursting.

The present invention has been developed in view of the above-mentioned circumstances, and even when discharging hot water continuously, the easy operability of the water flow rate adjustment handle can be maintained, and the faucet main body can be easily operated. The purpose of the present invention is to provide a new hot and cold water mixing faucet (hereinafter referred to as the "proposed faucet") that can also be protected.

``Structure of the invention'' (Means for solving the problem) The gist of the proposed faucet is that the inside of the faucet body has two channels: a hot water channel to which the hot water supply pipe is connected, and a water channel to which the water supply pipe is connected. In a hot water mixing faucet that is divided into a hot water channel and a mixing chamber for merging water channels,
A water on-off valve is provided in the division between the water channel and the mixing chamber in the faucet body, and a check valve is integrally provided at the outflow port facing the mixing chamber of the water on-off valve. It is in the point where it is.

(Function) The water on-off valve provided in the section between the water channel and the mixing chamber in the faucet main body is provided with a check valve at the outflow port facing the mixing chamber side. Since the check valve is a one-way valve that prevents water from flowing back into the water supply pipe from within the faucet body, water naturally flows freely into the mixing chamber from the water channel side. In other words, the faucet of the present invention does not have a conventional water chamber, that is, a closed chamber. Therefore, even if the water in the water channel or the like is heated by heat transfer from the discharged hot water, the expanded water due to the heating pushes open the check valve and flows out into the mixing chamber without any force. Therefore, abnormal pressure never acts on the water on-off valve. Additionally, as mentioned above, there is no need for a water chamber inside the faucet body, and the check valve can be provided so as to protrude into the mixing chamber, which simplifies the internal structure of the faucet body and makes the overall shape more compact. This allows for the diversification of external shape designs, etc. Furthermore, since the check valve is integrally provided with the water on-off valve, assembly to the faucet main body or maintenance work is extremely easy.

(Example) The present invention will be described below based on drawings showing examples thereof.

1 and 2 show the faucet of the present invention, in which FIG. 1 is a plan sectional view and FIG. 2 is a partially cutaway front view. As is clear from Fig. 2, the present faucet has a check valve 14 integrally provided on the secondary side of the water on-off valve 4, and is different from the conventional hot water mixing faucet in a sealed chamber. A feature is that nothing corresponding to the water chamber 7 (see FIG. 3) does not exist within the faucet body 10.

As shown in FIG. 1, the interior of the faucet main body 10 in the present faucet includes a hot water channel 11, a water channel 12, and a mixing chamber 13.
are defined by side partition walls 10a and 10b, respectively. A hot water supply pipe 8 is connected to the hot water passage 11 via a hot water supply port 11a of a hot water supply leg 11b,
The water channel 12 has a water supply port 12 of the water passage leg 12b.
A water supply pipe 9 is connected via a. Further, the mixing chamber 13 is in communication with the hot water channel 11 and the water channel 12, respectively, so that the supplied hot water and the supplied water join together.

As shown in FIG. 2, a side partition wall 10 partitions the water channel 12 and the mixing chamber 13 within the faucet body 10.
b is provided with a water on-off valve 4. The water on-off valve 4 is housed in a cartridge case 15, and its valve structure is substantially the same as that of a conventional valve. That is, two disks 4a, 4
The valve function is performed by the joint sliding movement of b. A plurality of inflow holes 15a are bored in the outer peripheral surface of the cartridge case 15 on the rotary disk 4b side of the water on-off valve 4, and the inflow holes 15a allow water supplied from the water channel 12 to flow into the valve interior. There is an increasing influx in the market.

A check valve 14 is integrally provided in the cartridge case 15 on the secondary side of the water on-off valve 4 . The check valve 14 is positioned so as to face the outflow port of the water on-off valve 4 facing the mixing chamber 13 side, that is, the water port (not shown) of the fixed disk 4a. Needless to say, the direction in which the check valve 14 is installed is the same as that of the water on-off valve 4.
The valve body 14a is oriented in tension against the valve seat 14b provided on the side, so that water supplied from the water channel 12 flows into the mixing chamber 13, and its backflow is prevented.

In the faucet of the present invention, when the water flow control handle 2 is operated to open the water on-off valve 4, water from the water channel 12 pushes open the check valve 14 and reaches the mixing chamber 13. On the other hand, when hot water is continuously discharged by operating only the hot water flow rate adjustment handle 3, the check valve 14 is closed to prevent mixing of hot water and water. However, when the water sealed between the water on-off valve 4 and the check valve 14 is heated by heat transfer from the discharged hot water, the expanded water accompanying this heat pushes the check valve 14 open and mixes. It begins to flow into the chamber 13.
Therefore, no unreasonable pressure is applied to the water on-off valve 4, and even if the water flow rate adjustment handle 2 is subsequently operated, easy operability can be obtained. Note that the amount of water flowing into the mixing chamber 13 as described above is of course small, and there is no risk of lowering the water temperature. Further, at this time, even if the water in the water channel 12 expands due to heating, the pressure will be released to the water supply pipe 9 side, and there will be no problem.

Note that the water on-off valve 4 is not limited to the above-mentioned disc valve, but may be a valve whose valve body moves in the axial direction relative to the valve seat to open and close the valve. Further, in this embodiment, as shown in FIG. 1, the combined disc valve and check valve used on the water side was also provided on the hot water side. By doing so, there is an advantage that maintenance of disk valves, check valves, etc. on both the hot water side and the water side is easy.

(Study of Alternative Embodiments) The faucet of the present invention is not limited to being implemented in a two-handle type hot water mixing faucet as shown in the above embodiment, but can also be implemented in a single lever type hot water mixing faucet, etc. It is. In this way, the configuration and shape of the faucet of the present invention can be changed as appropriate depending on the mode of implementation.

"Effects of the Invention" As is clear from the above explanation, according to the hot and cold water mixing faucet according to the present invention, even when hot water is continuously discharged, there is no abnormal pressure against the water on-off valve. has no effect. Therefore, the operation of the water flow rate adjustment handle does not become difficult. In addition, since the flow rate adjustment handle is not forced to be operated in this way, deterioration and damage to the gasket etc. can be prevented. Of course, there is no risk of the faucet body bursting, and it can be used safely. Furthermore, since there is no need to take the trouble to provide a water chamber within the faucet body, the faucet body can have a simpler internal structure, a more compact overall shape, and a more diversified external design. Furthermore, since the water on-off valve and check valve are integrated, it has many excellent advantages, such as extremely easy assembly to the faucet body and maintenance work. There is.

[Brief explanation of the drawing]

Figures 1 and 2 show the proposed faucet; Figure 1 is a plan sectional view, Figure 2 is a partially cutaway front view, and Figure 3 is a partial view of a conventional hot water mixing faucet. FIG. 4 is a cutaway plan view and a rear cross-sectional view of a water passage leg showing the mounting structure of a check valve in a conventional hot water mixing faucet. 2...Water flow rate adjustment handle, 4...Water on/off valve, 8...Hot water supply pipe, 9...Water supply pipe, 10...
Faucet main body, 10b... side partition wall (dividing section between water channel and mixing chamber), 11... hot water channel, 12... water channel, 13...
...Mixing chamber, 14...Check valve.

Claims (1)

[Scope of utility model registration request] In a hot water mixing faucet, the interior of the faucet body is divided into a hot water passage to which a hot water supply pipe is connected, a water passage to which a water supply pipe is connected, and a mixing chamber for merging these hot water passages and water channels. A water on-off valve is provided in the division between the water channel and the mixing chamber in the main body, and a check valve is integrally provided at the outflow port facing the mixing chamber of the water on-off valve. A hot water mixing faucet featuring: