JPS5910455Y2 - hot water mixing faucet - Google Patents

Description

[Detailed description of the invention] This invention is a hot water supply system that eliminates the hassle of operating valves to obtain mixed water at a desired temperature, and prevents damage to the water heater by preventing the water side from applying back pressure to the hot water side. Regarding mixing faucets.

In conventional hot and cold water valves, the opening degrees of the hot water and cold water valves are adjusted to obtain mixed water at the desired temperature using separate open/close operations. The temperature of the mixed water fluctuates constantly due to the direct effect of quantitative changes associated with pressure changes, which causes the hassle of valve operation in that the opening degrees of the hot water and water valves must be adjusted frequently. was there.

In addition, in order to avoid this trouble, some systems introduce water and hot water into a mixing chamber and then install a temperature control valve to draw out the temperature-adjusted mixed water, but this does not make the structure complicated. This is unavoidable, and it is also expensive, so it is not suitable for so-called low cost.

Furthermore, in the case where an on-off valve is only provided in addition to the Yukawa valve and water valve, the water side and the hot water side are in communication with each other, so when the on-off valve is closed, the water side is usually the high pressure side. As a result, back pressure is applied to the hot water side, which may damage water heaters and other hot water supply devices.

Furthermore, in hot water mixer faucets, it has been conventional practice to provide check valves on the upstream side, that is, the primary side, of the hot water valve and the cold water valve. With a structure equipped with a check valve, when the water valve is closed and only hot water is used, the water side part of the main body where the water valve is installed is cut off from the water supply source by the check valve, so the main body The water side of the water valve and the valve stem and handle that operate the water valve are heated to high temperatures, so there is an inconvenience in that you have to be very careful when operating the water valve. In the case of a hot/cold mixer faucet equipped with an on-off valve, if the check valve is installed on the primary side of the hot water valve and water valve as described above, the Yukawa valve or water When the valve is closed, the valve stem enters the space that is downstream of both check valves and upstream of the on-off valve in response to the closure of the Yukawa valve and the water valve. There is an inconvenience in that the pressure of the water retained in the lever space increases, and a large amount of force is required to operate the handles for opening and closing the hot water valve and water tap.

The present invention eliminates the above-mentioned drawbacks of conventional hot water mixing faucets and improves handle operability when closing the hot water valve and water valve with the on-off valve closed. With the goal.

The basic structure of the present invention includes a hot water valve, a water valve, and an on-off valve, and a check valve is provided between the hot water valve and the on-off valve, and between the water valve and the on-off valve, so that the on-off valve can be operated. When the hot water and water valves are closed with the valves closed, the water is transferred to the handle of the hot water and water valves as the valve stem approaches. It is designed to escape to the upstream side.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the hot water mixing faucet of the present invention will be described below with reference to the accompanying drawings.

First, the first embodiment of the present invention shown in FIG. 1 will be explained as follows.

The main body 1 of the hot water mixing faucet has a back side connected to a water supply pipe 6 leading to a water supply source (not shown) and a hot water supply pipe 7 leading to a hot water supply device (not shown).

The water supply pipe 6 and the hot water supply pipe 7 each have a flange 8 and are fixed to the wall surface W.

Further, a water discharge pipe 9 is connected to the lower central portion of the main body 1, and mixed water at a desired temperature is discharged from a water discharge port 9' at the tip thereof.

Since the main body 1 is shaped symmetrically, only the hot water side will be described below unless otherwise specified.

The water side has exactly the same structure as the hot water side.

The interior of the main body 1 is divided by a partition wall 10 into a boiling water flow path 11 on the left side and a mixed water flow path 12 in the center. It is divided into a secondary side leading to the water flow path 12.

A hot water valve 2 for opening and closing the through hole 14 provided in the partition wall 13 is provided, and a check valve 4 for opening and closing the through hole 15 provided in the partition wall 10 is provided respectively. ing.

Reference numeral 3 indicates a water valve, and a check valve 4' identical to the check valve 4 is provided at a symmetrical position.

The hot water valve 2 has a handle 2 for opening and closing it.
0, a valve shaft 21 screwed into the main body 1 attached to the handle 20, and a valve seat 16 fixed to the tip of the valve shaft 21 and provided on the rim of the through hole 14 in vertical direction contact; This is caused by the valve body 22 being released.

Note that 30 is a handle for opening and closing the water valve 3.

The check valve 4 has a valve seat 17 provided on the edge of the through hole 15.
A valve body 40 that moves toward and away from the valve body in the vertical direction, a packing 57 that is attached to the valve body 40 and has an annular protrusion 58, and a packing 57.
Spring 4 for pressing the valve against the valve seat 17 with a constant pressure
1. A lid 42 screwed onto the main body 1 to support the spring 41, a guide 43 slidingly in contact with the inner peripheral surface of the lid 42 to ensure vertical movement of the packing 5, and the through hole. The guide 43' is in sliding contact with the guide 15.

Said guide 43. 43' are both manufactured by punching out a metal plate, and consist of a circular seat part a and a plurality of legs b marked at appropriate positions on the periphery of the seat part a.

Further, an on-off valve 5 for opening and closing the mixed water flow path 12 downstream of the check valve 4 is provided in the center of the main body 1.

As shown in FIG. 2, this on-off valve 5 includes a lever handle 50 for opening and closing the valve at a constant rotation angle, a valve shaft 51 screwed into the main body 1 attached to the lever handle 50, A valve body 52 is fixed to the valve shaft 51 and connected in the front-rear direction to the valve seat 19 at the mouth of the through hole 18 provided in the front view of the partition wall 10;
It is composed of a packing 59 having a diameter of 0.

Note that this valve body 52 is designed to open and close the through hole 18 leading to the water discharge pipe 9 from the back side, and for this purpose, the tip of the valve shaft 51 is designed to ensure straight forward and backward movement of the valve body 52. A guide portion 53 is formed to fit into a guide hole 56 of the back cover 55.

As shown in the second embodiment of the present invention shown in FIG. 3, the opening valve 5 is configured to open and close the passage (L18) from the front, and the valve body 52 is made into a shape stamped from a metal plate and slides into contact with the through hole 18. A guide 54 may also be provided.

In this case, the back cover 55 is not required, and the structure can be made simpler, and the assembly can be made easier and the cost can be lowered.

In addition, as in the third embodiment of the present invention shown in FIG.
The through hole 18 may be opened and closed from the front, and the water discharge pipe 9 may be connected to the upper center of the main body 1.

Note that the valve body 52 is not provided with a guide as in the first embodiment and the second embodiment.

Also in this case, check valves 4 and 4' are provided on the secondary sides of the hot water valve 2 and the water valve 3, respectively.

When you want to obtain mixed water at a desired temperature, open/close the hot water valve 2 and water valve 3 by opening/closing handles 20. 30 are opened to appropriate opening degrees, the amount of hot water and water corresponding to the opening degrees will push open the check valves 4 and 4' on the secondary side with water pressure and flow into the mixed water flow path 12. Inflow.

This mixed water flow path 12 is opened by operating the on-off valve 5, and mixed water at a desired temperature is discharged through the water discharge pipe 9.

Therefore, once you have adjusted the opening degrees of the hot water valve 2 and the water valve 3, you can stably obtain mixed water at the set temperature by simply operating the on-off valve 5, which eliminates the hassle of valve operation. It is something that cannot be found.

Furthermore, since it is not necessary to frequently operate the hot water valve 2 and the water valve 3, hot water and water are not wasted during adjustment.

Moreover, when the hot water valve 2 and the water valve 3 are open, the on-off valve 5
Even if back pressure is applied to the hot water side when the cold water meter on the high pressure side is closed, check valves 4 and 4' are provided on the secondary side of the hot water valve 2 and the water valve 3. Since the hot water flow path 11 and the cold water flow path (no reference numeral) do not communicate with each other due to the blocking action of the check valve 4 on the hot water side, the above-mentioned high back surface does not cover the hot water supply device such as a water heater, and hot water supply is possible. There is no risk of damaging the device.

Also, even if there is negative pressure on the hot water side or the water side, check valves 4 and 4
' to reliably prevent backflow, and check valves 4, 4
Since the opening/closing direction of ' is easily arranged in the vertical direction, the non-return effect can be further improved.

In addition, by integrally providing the hot water valve 2, water valve 3, check valves 4, 4', and on-off valve 5 in the main body 1, the overall design effect can be improved. It is effective.

In addition, although the example described a wall-mounted hot water mixer faucet,
The present invention is not limited to this, and can also be applied to a hot/cold mixer faucet for a shower bath. It is a good thing.

According to the hot water mixer faucet of the present invention having the above-described structure, the following effects can be achieved.

(1) Check valves are installed downstream of the hot water valve and water valve, so if the Yukawa valve or water valve is closed with the on-off valve closed, the valve stem will As the hot water or water enters the main body, the amount of hot water or water equivalent to the amount entering the valve stem can escape to the upstream side of the hot water valve or water valve, respectively. The handle does not have to be heavy to operate, and the handle has excellent operability.

(2) Check valves are provided downstream of the hot water valve and the water valve, so when the on-off valve is closed, the mixed water will not flow back into the hot water source or water supply source. When the valve is closed and only hot water is used, the water valve is cut off from the hot water and communicates with the water supply source, so if a check valve is installed upstream of the water valve, the The water side part, the valve stem of the water valve, and the handle attached to it do not get hot, making the mixing faucet highly safe to operate.

(3) The Yukawa valve and the water valve are arranged on both sides of the horizontally long main body, and each check valve is installed inside the main body on the downstream side of the hot water valve and the water valve, respectively. The mixing faucet can be made more compact than when it is installed on the upstream side, and the protrusion from the mounting wall is smaller, so it does not get in the way during use.

Furthermore, by closing the hot water valve and the water valve, each check valve and on-off valve can be easily repaired or replaced.

(4) Once you have adjusted the temperature of the mixed water to the desired temperature by operating the hot water valve and water valve, you can immediately obtain mixed water at the desired temperature when needed by simply operating the on-off valve. It is easy to use because hot water is not wasted due to temperature adjustment, and it has a large water saving effect.Water supply sources generally have higher water pressure than hot water sources, but there is no water pressure downstream of the hot water valve. Since the stop valve is provided, there is no risk that the high pressure of the water supply source will be transmitted to the hot water source and cause damage to the water heater.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing a first embodiment of a hot water/cold water mixing faucet according to the present invention, Fig. 2 is a longitudinal sectional side view showing the same partially cut away, and Fig. 3 is a longitudinal sectional view showing a second embodiment of the invention. FIG. 4 is a vertical side view of the main part showing the third embodiment of the present invention, FIG. 5 is an enlarged vertical front view of the guide 43', and FIG. 6 is FIG. A cross-sectional bottom view along the line, Figure 7 is guide 4
3, FIG. 8 is a cross-sectional plan view taken along line II--II in FIG. 7, and FIG. 9 is an enlarged longitudinal sectional view of the packing of the check valve. 1...Main body, 2...Hot water valve, 3...Water valve, 4,
4'...Check valve, 5...Opening/closing valve, 9...Water pipe,
21... Valve stem.

Claims (1)

[Scope of utility model registration request] A horizontally elongated main body, a hot water valve and a water valve provided on the left and right sides of the main body, each having a valve shaft that is opened and closed separately and screwed into the main body, and approximately in the center of the main body. It has an on-off valve that is provided in the part and controls the discharge of hot water mixed water, and a water discharge pipe connected to the main body, and a flow path between the hot water valve and the on-off valve, and a flow path between the hot water valve and the water valve. A hot water mixing faucet with a check valve installed in each flow path between the on-off valve and the on-off valve.