JPH05609Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention has a water chamber and a hot water chamber separated by a partition wall inside the faucet body, and the cold water supplied to the water chamber and the hot water chamber are separated from each other by a partition wall. The present invention relates to an improvement of a hot water mixing faucet that mixes and discharges hot water.

[Prior Art] FIGS. 6 and 7 show the general structure of a single-lever type hot water mixing faucet. That is,
In this hot water mixing faucet 1, the inside of the faucet main body 1a is divided into a water chamber 4, a hot water chamber 5, a hot water mixing chamber 6, and a valve chamber 7 by partition walls 2, 3, and 20. In a valve chamber 7 communicating with these chambers 4, 5, and 6, there is disposed a flow rate regulating valve 10 which is made of a set of two ceramic fixed plates 8 and a movable plate 9 superimposed on each other in a watertight and slidable manner. There is. The fixed plate 8 has a water inlet 8 leading to the water chamber 4.
a, a hot water inlet 8b leading to the hot water chamber 4, and a mixing chamber 6.
A mixed water outlet 8c leading to the mixed water outlet 8c is opened.
The movable plate 9 intermittents the communication state between the water inlet 8a of the fixed plate 8 and the mixed hot water outlet 8c, and the communication state between the water inlet 8a and the mixed hot water outlet 8c of the fixed plate 8, on their overlapping surfaces. A distribution channel 9a is formed.

Three ports, a water port 21, a hot water port 22, and a mixed water port 23, are opened in the partition wall 20, and the valve chamber 7 is communicated with the water chamber 4, the hot water chamber 5, and the mixing chamber 6. The water inlet 8a, hot water inlet 8b, and mixed hot water outlet 8c of the flow control valve 10 installed in the valve chamber 7 are connected to these ports 21 to 23.
, and each port 21 to 23 and inlet 8
A, 8b, and a gasket 2 are attached to the joints with the outlet 8c.
4, 25, and 26 are installed.

These gaskets 24, 25, and 26 are held in a sheet-like gasket holder (not shown in FIGS. 6 and 7) 27 interposed between the fixing plate 8 and the partition wall 20. Figure 5 shows the conventional packing holder 2.
7 is a plan view of FIG. The holder 27 has three openings 2
7a, 27b, 27c, each of the above-mentioned packing 2
4, 25, and 26 are installed. Each opening 27a
-c serve as passage ports for water, hot water, and mixed water, respectively. Note that the reference numeral 27d is a screw insertion hole.

The water chamber 4 and the hot water chamber 5 are connected to a water supply pipe 13 and a hot water supply pipe 14 via legs 11 and 12, respectively. An upstream stop valve 15 and a downstream check valve 16 are arranged within the legs 11 and 12. The check valve 16 is for preventing hot water or water from flowing back to the supply side when the pressure in the water chamber 4 or the hot water chamber 5 increases for some reason. The temperature of hot water is adjusted by rotating the lever 17 left and right to adjust the amount of hot water flowing into the mixing chamber 6.

[Problems to be solved by the invention] However, in the hot water mixing faucet 1 in which the check valve 16 is disposed, when only hot water is being supplied,
The water in the water chamber 4 is warmed and expanded through the partition walls 2 and 3 and the outer shell of the faucet body 1a. At this time, the water chamber 4 is in a sealed state by the flow control valve 10 and the check valve 16. Therefore, due to the expansion of the water in the water chamber 4, the pressure in the water chamber 4 increases, and the ceramic valve body is pressed into contact with the ceramic valve body more than necessary, resulting in poor slippage between the two and making it difficult to operate the handle 17. Ta. Further, the faucet main body 1a may suffer early fatigue failure due to the repeated history of cooling and heating cycles due to repeated actions. The pressure inside the water chamber 4 sometimes reached 100 Kg/cm ² .

[Means for solving the problem] The single lever type hot water mixing faucet of the present invention has the following features:
Cutouts are provided in the water and hot water gaskets of the gasket holder for communicating the water side and the hot water side. Then, a packing is attached that goes around the inner periphery of the opening for attaching the packing holder and the cutout, and a flexible tongue part is provided in the cutout part of the packing to isolate the hot water side and the water side.

[Function] According to the present invention, when the pressure in the water chamber increases, expanded water corresponding to the pressure increase can be released from the water chamber into the bath chamber. That is, when only hot water is continuously supplied, the water sealed in the water chamber expands and its pressure gradually increases. Then, the expanded water pushes down the tongue part of the gasket and flows out into the bathtub where the pressure is low. the result,
It is possible to prevent the pressure inside the water chamber from becoming abnormally high.

Further, under normal pressure conditions, the tongue portion does not deform and the water side and hot water side are isolated.

[Examples] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a gasket holder 27A employed in a water faucet according to an embodiment of the present invention. This gasket holder 27A has an opening 27a for attaching a water gasket.
The opening 27b for attaching the hot water gasket is communicated with the cutout 27e. As shown in FIG. 2, these integrated openings 27a,
A gasket 28 is attached that goes around the inner periphery of the cutout 27b and the cutout 27e. This Patsukin 28
The portion attached to the cutout portion 27e has a constricted shape, and a flexible tongue portion 29 that can isolate the water side and the hot water side is provided in this portion.
The other configurations are the same as those in FIGS. 4 and 5.

When no large external force is applied to the tongue portion 29, its tip abuts against the opposing inner surface of the gasket 28 as shown in FIG. 2, separating the water side from the hot water side.

Furthermore, when the water in the water chamber expands and its pressure increases more than a predetermined pressure by continuously supplying only hot water, the tongue piece 29 cannot resist this water pressure and tilts toward the hot water side, causing the expanded water pressure to rise. leaks to the hot water side. This prevents the pressure inside the water chamber from becoming higher than a predetermined pressure.

Incidentally, since the overall structure of the faucet equipped with the gasket holder 27A is as shown in FIGS. 6 and 7, a description thereof will be omitted.

In the present invention, it is preferable to select the material of the gasket and the thickness of the tongue so that the tongue can be pushed open when the water pressure in the water chamber increases to about 20 to 30 kg/cm ² or more. By the way, normal tap water pressure is 5 to 6 kg/
cm ² , so if the selection is made as described above, the water pressure can be configured to leak only when the pressure inside the water chamber rises to a considerable extent due to heat transfer from the hot water.

[Effects of the invention] As detailed above, in the present invention, even if expanded water is generated in the water chamber of a hot and cold water mixing faucet, this expanded water pressure can be relieved to the hot water side, so that the water inside the water chamber is It is possible to prevent the pressure from increasing, and there will be no inconvenience such as difficulty in operating levers, etc. Furthermore, the faucet body does not get fatigued and prematurely break due to repeated cooling and heating cycles due to repeated use.

[Brief explanation of drawings]

FIG. 1 is a plan view of a gasket holder used in the faucet of the present invention, and FIGS. 2 and 3 are plan views of the gasket holder when the gasket is attached. Figures 4 and 5 are plan views of conventional packing holders;
7 and 7 show a conventional hot and cold water mixing faucet, and FIG. 6 is a front view showing the main parts in cross section;
FIG. 7 is a right side view showing the main part as a slope. 1a... Faucet body, 2, 3, 20... Partition wall, 4
... Water chamber, 5 ... Water chamber, 6 ... Mixing chamber, 7 ... Valve chamber, 10 ... Flow rate adjustment valve, 27, 27A ... Packing holder, 24, 25, 26, 28 ... Packing, 29 ...Tongue piece.

Claims (1)

[Claim for Utility Model Registration] Inside the faucet body, a water chamber, a hot water chamber, a mixing chamber, and a valve chamber are formed that are divided by a partition wall, and the water chamber, hot water chamber, and mixing chamber protrude from the valve chamber partition wall. It communicates with the valve chamber through the provided water port, hot water port, and mixed water port, and a flow rate control valve is installed in this valve chamber.
The water inlet, hot water inlet, and mixed water outlet of the flow rate control valve are connected to each of these ports via a gasket, and the gasket is attached to an opening provided in a sheet-like gasket holder, and the water In a single-lever hot water mixing faucet in which a check valve is arranged in a water supply passage communicating with a room, the gasket holder has a cutout that connects an opening for installing a gasket on the water port and an opening for installing a gasket on the hot water port. It is possible to install a gasket that goes around the inner periphery of the opening and the cutout for installing the gasket for water and hot water, and to isolate the hot water side and the water side in the cutout portion of the gasket. A single-lever hot water mixing faucet characterized by a flexible tongue.