JPH1137318A - Mixed faucet for water and hot water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent heat from transferring to the outer surface of a faucet even when high-temperature water is used by forming a hot water passage from a hot-water supply tap to a drain hole with an insulating material. SOLUTION: One end of a faucet body 1 of a mixed faucet for water and hot water is connected to a hot-water piping 2, while the other is connected to a feed water piping 3, and a bush 7 for guiding a spindle 6 with an Acme screw 5 is provided on a valve seat on the hot-water side 4, which is a hot-water supply tap provided at the hot-water piping 2 in the faucet body 1. A hot-water passage from the valve seat on the hot-water side 4 and the bush 7 to a discharge opening 16 of the faucet body 1 is constituted by an insulating material. Also, an elbow 15 is arranged at the center in the faucet body 1, and this elbow 15 is opened in three directions of the hot-water supply side, water supply side and the discharge opening 16 of the faucet body 1, opened in the direction of the faucet through an O ring 17, provided in the water-tight manner in the faucet body 1 through the O ring 17, and a faucet 18 is connected to the discharge opening 16. By this, the outer surface of the faucet does not become hot but can be used favorably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hot and cold water mixing faucet.

[0002]

2. Description of the Related Art FIG. 6 is a partially cutaway front view showing an example of a conventional two-valve hot and cold water mixing faucet. One of the faucet bodies 1 of the hot and cold water mixing faucet is connected to a hot water supply pipe 2, and the other is connected to a water supply pipe 3. A spindle 6 is guided by an acme screw 5 to a hot water side valve seat 4 provided in a hot water supply pipe 2 in the water faucet body 1. A handle 8 is fixed to the top of the spindle 6, and a hot water supply valve 9 is fixed to the lower part.

A spindle is guided by an acme screw to a water-side valve seat 12 provided in a water supply pipe 3 in the faucet body 1, similarly to the hot-water-side valve seat 4, and a handle 1 is provided at the top of the spindle.
3 is fixed, and a water supply valve 14 is fixed to a lower part.

Hot water and water flow in from the left and right sides of the faucet body 1, and are mixed at the center of the faucet body 1. The temperature of the hot and cold water mixture is adjusted by appropriately changing the opening degrees of the left and right valves 9 and 14. The faucet body 1 is usually made of a copper alloy casting for corrosion resistance and manufacturing reasons.

With the above arrangement, when hot water and water are mixed and water is spouted at an appropriate temperature, the hot water supply portion of the faucet body becomes hot due to the heat conduction of the hot water flowing inside, and is inadvertently touched. Risk of burns.

Accordingly, Japanese Patent Laid-Open Publication No. 63-31169 and Japanese Utility Model Publication No. 21656/1988 disclose a method in which the surface temperature of the main body is not increased. Japanese Unexamined Utility Model Publication No. 63-31169 discloses a type in which a synthetic resin cover is provided around a water passage composed of pressure-resistant components. Further, Japanese Utility Model Publication No. Hei 2-21656 discloses that the hot water flowing into the main body from the hot water side valve is guided to the vicinity of the callan inlet in a state where the inside of the tubular water passage is isolated from the water. During normal use, the inside of the main body of the faucet is mainly in contact with water, and the surface of the main body does not easily become hot.

[0007]

However, in the embodiment described in Japanese Utility Model Application Laid-Open No. 63-31169, a water passage composed of pressure-resistant parts is covered with a cover to form the faucet. There is a disadvantage that the shape of the main body is limited to a shape that can be made by resin molding or press working of the cover, and since there is no texture of the conventional faucet body made of casting, consumers are told that "cheaper". Was given the impression.

In the embodiment described in Japanese Utility Model Publication No. 21656/1990, this point is improved, but since another tubular water passage must be formed in the faucet main body, the embodiment is not practical. Constituting the tubular water passage with a casting as in the example increases the complexity of the casting mold and increases the cost.
When only the hot water is passed through the two-valve faucet, for example, when only hot water is poured into the bathtub with a bath faucet, the hot water flows from the hot water mixing section to the water portion inside the main body. After a while, the heat insulation effect of the main body is lost. In the present invention, an object of the present invention is to provide a hot-water mixing faucet which has a heat-insulating structure for a hot-water mixing faucet, which can be applied to a casting body, can be manufactured at a low cost, and has a sufficient heat-insulating effect even when only hot water is supplied. And

[0009]

The hot and cold water mixing faucet of the present invention is characterized in that the inner surface of the flow passage is formed of a heat insulating member.
With this configuration, the outer surface of the faucet does not become hot even when the outer surface is made of a metal and hot water is used.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the hot and cold water mixing faucet of the present invention, at least the inner surface of the hot water side flow path is formed by a heat insulating member, and in particular, the hot water flow path from the hot water supply port to the water discharge port of the faucet body is formed by a heat insulating member. By doing so, even when high-temperature hot water is used, heat is not transmitted to the outer surface of the faucet. Further, in the hot and cold water mixing faucet of the present invention, the heat insulating effect can be further improved by adopting a structure in which the hot water flow path formed by the heat insulating member is surrounded by the water flow path.

Further, by making a part of the hot water flow path a flexible resin material, the hot water flow path can be easily formed in the faucet body. As the resin material, EP (engineering plastics) having heat resistance and high strength is used. For example, PPS (polyphenylene sulfide), PSF (polysulfone), PP (polypropylene), and the like are suitable.

By providing the open / close valve in the hot water flow path formed by the heat insulating member, the open / close valve can be constituted by a heat insulating member that can withstand the primary pressure, and the rest of the open / close valve can be constituted by a heat insulating member that can withstand the secondary pressure. A heat insulating member corresponding to the strength can be used.

Since the hot water flow path formed by the heat insulating member is provided with a communication port communicating with the water flow path, the hot water and the water can be mixed well. Furthermore, if a check valve is provided at the communication port to prevent hot water from flowing back into the water flow path, high-temperature hot water does not flow into the water-side flow path. The heat insulation effect is improved.

[0014]

【Example】

Embodiment 1 FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention.

One of the faucet bodies 1 of the hot and cold mixing faucet is connected to a hot water supply pipe 2 and the other is connected to a water supply pipe 3.
A bush 7 for guiding a spindle 6 with an acme screw 5 is provided on a hot water side valve seat 4 provided on a hot water supply pipe 2 in the water faucet main body 1. A handle 8 is fixed to the top of the spindle 6, and a hot water supply valve 9 is fixed to the lower part.

The hot water side valve seat 4 and the bush 7 are made of a heat insulating member in order to make it difficult for the heat from the hot water to be conducted to the metal faucet main body 1. Since the hot water side valve seat 4 and the bush 7 are loaded with the primary pressure (water supply pressure) when the hot water supply valve 9 is closed, the hot water side valve seat 4 and the bush 7 need to be strong enough to withstand this load. EP having high strength is used.

Between the hot water side valve seat 4 and the bush 7, PPS,
A hollow body 11 made of EP such as PSF is provided.

The water-side valve seat 12 provided in the water supply pipe 3 in the faucet main body 1 is provided with a bush for guiding the spindle with an acme screw similarly to the hot-water side valve seat 4, and a handle is provided at the top of the spindle. 13 is fixed, and the water supply valve 1
4 is fixed.

An elbow 15 is arranged at the center of the faucet main body 1. The elbow 15 opens in three directions of a hot water supply side, a water supply side and a water discharge port 16 of the faucet main body 1, and has an O-ring 17. The water faucet body 1 is provided in a watertight manner, and a water discharge port 16 is connected to a callan 18.

A check valve 1 made of rubber is provided on the water supply side of the elbow 15.
9 is provided to prevent hot water from flowing back from the hot water supply side to the water supply side. The hot water supply side of the elbow 15 and the branch portion 20 of the hollow body 11 are connected by a rubber hose 21.

The primary pressure is not applied to the hollow body 11, the elbow 15, the check valve 19 and the rubber hose 21, so that the pressure resistance of the hot water side valve seat 4 and the bush 7 is not required. The pressure difference between the inner peripheral portion and the outer peripheral portion of the hollow body 11, the elbow 15, the check valve 19 and the rubber hose 21 is opposite when both hot and cold water is flowing or when only water is discharged. It is only the pressure loss generated at the stop valve 19. In the case of spouting only on the hot water side, only the back pressure by the downstream curran 18 is applied to the inner peripheral side, and the outer peripheral part is filled with water. Are alleviated.

In the above arrangement, the hot water flowing into the hot water side valve seat 4 from the hot water supply pipe 2 is supplied to the hollow body 1 through the gap of the hot water side valve seat 4.
Rubber hose 21 and elbow 1 connected to one branch 20
5, on the other hand, water flowing into the water side valve seat 12 from the water supply pipe 3 enters the elbow 15 from the check valve 19 in the elbow 15, is mixed with hot water, and is discharged from the curran 18. . At this time, the hollow body 11, the rubber hose 21, and the portion between the elbow 15 and the faucet main body 1 are also filled with water.
Since the inner surface of the faucet body 1 does not directly contact the hot water,
Touching the faucet from outside does not cause burns and is safe.

Embodiment 2 FIG. 2 is a partially cutaway front view showing a second embodiment of the present invention.

Members other than the rubber hose 21 are the same as those of the third embodiment, and the same members as those of the third embodiment are denoted by the same reference numerals. A branch 20 of a hollow body 11 provided between a hot water side valve seat 4 and a bush 7 via a flat packing 10 and a water outlet 16 are connected by a rubber hose 21.
One intake port 22 is provided on the rubber hose 21 on the side close to the hot water side valve seat 4. The rubber hose 21 is provided with a bellows 23 so as to be easily connected to the branch portion 20 and the water outlet 16.

In the present embodiment, water is easily circulated throughout the hollow body 11 and the entire portion between the rubber hose 21 and the faucet main body 1, so that the cooling effect of the faucet main body 1 is improved and the water in the stagnant portion is improved. Problems such as contamination due to decay can also be prevented.

In the first embodiment, the hot water and the water are mixed so as to collide with each other in the mixing section, whereas in the present embodiment, the hot water and the water are merged in the 90 ° direction and mixed. Therefore, for example, when the pressure of water is considerably higher than the pressure of hot water (water pressure 2.0 kgf / cm ² , hot water pressure 0.5 kgf / c
The m ^2, etc.), in the first embodiment, it is not possible to hot water flow mixes with sufficient water pushed to flow pressure of water, the water discharge of the suitable temperature by adjusting the hot water and water handle When you want to put out,
The adjustable angle of the handle has a large and narrow range in which only water is discharged. This point is solved in the present embodiment, and the temperature adjustment is facilitated.

Embodiment 3 FIG. 3 shows a third embodiment. FIG. 3- (a) is a perspective view and FIG. 3- (b) is a cross-sectional view.

A hollow body 11 made of a heat insulating member is slidably disposed around an opening / closing valve unit 24 provided at one end of the faucet body 1 for passing hot water. An opening 25 is provided inward, and one end of a heat-insulating PP inner pipe 27 is connected to the opening 25 via a rubber connector 26.

At the other end of the inner pipe 27, a cylindrical body 28 is provided.
Is formed, and the tubular body 28 surrounds the switching valve unit 30 for switching between the curran 18 and the shower 29. An intake port 22 having a check valve 19 for taking in water is provided in the middle of the inner pipe 27.

At the other end of the faucet body 1, an opening / closing valve unit 31 for passing water is provided. In the above configuration,
Hot water flows from the opening / closing valve unit 24 to the opening 25 of the hollow body 11.
And switching valve unit 3 through inner pipe 27
0, water flows from the opening / closing valve unit 31 through the intake port 22 of the inner pipe 27 and the inner pipe 2
7, mixed with hot water, and switched to the shower 29 or the curran 18 by the switching valve unit 30.

Also in this embodiment, since hot water does not flow back from the hot water supply side to the water supply side by the check valve 19 because hot water passes through the heat insulating member, the hot water does not come into contact with the faucet body 1.
It is safe without burns even if you touch the faucet from outside.

Embodiment 4 FIG. 4 shows a fourth embodiment. FIG. 4- (a) is a perspective view, and FIG. 4- (b) is a cross-sectional view.

This embodiment has the same components as the third embodiment shown in FIG. 3 except for the inner pipe, and the same members as those in the third embodiment are denoted by the same reference numerals.

A hollow body 11 made of a heat insulating member is slidably disposed around an opening and closing valve unit 24 provided at one end of the faucet body 1 for passing hot water. An opening 25 is provided inward, and a rubber connector 26 is provided in the opening 25. An opening 33 of a heat-insulating inner pipe 27 made of PP is spaced from a hot water outlet 32 of the connector 26 so as to form a water inlet. A tubular body 28 is formed at the other end of the inner pipe 27, and the tubular body 28 surrounds a switching valve unit 30 that switches to the callan 18 or the shower 29.

In the above configuration, hot water flows from the opening / closing valve unit 24 into the switching valve unit 30 through the opening 25 of the hollow body 11, the hot water outlet 32 of the connector 26, and the inner pipe 27. Water is supplied from the opening / closing valve unit 31 to the hot water outlet 32 of the connector 26 and the inner pipe 2.
7 into the inner pipe 27 through the water inlet
It is mixed with hot water and switched to the shower 29 or the curan 18 by the switching valve unit 30.

In this embodiment, since hot water does not flow directly into the heat-insulating inner pipe 27 and hot water does not come into contact with the water faucet main body 1, even if the water faucet is touched from the outside, there is no burn and safety. It is. Also, there is an advantage that the inner pipe 27 can be easily inserted into the hot water outlet 32 of the connector 26 at the time of assembly.

Embodiment 5 FIG. 5 shows a fifth embodiment of the present invention. FIG. 5- (a) is a perspective view, FIG. 5- (b) is a cross-sectional view, and FIG. FIG.

One of the faucet bodies 1 of the hot and cold mixing faucet is connected to a hot water supply pipe 2 and the other is connected to a water supply pipe 3.

The opening / closing valve unit 24 for passing hot water provided in the hot water supply pipe 2 of the faucet main body 1 is provided with an opening 25 toward the inside of the faucet main body 1.
Of the rubber hose 21 is connected to the water outlet 16.
It is connected to the. The rubber hose 21 is provided with a bellows 23 so as to be easily connected to the opening 25 and the water outlet 16.

In the middle of the inner pipe 27, a water inlet 22 provided with a check valve 19 for taking in water is provided. On the other end of the faucet main body 1, an opening / closing valve unit 31 for passing water is provided.

In the above configuration, hot water flows into the rubber hose 21 from the opening / closing valve unit 24. Water flows from the opening / closing valve unit 31 through the intermediate water intake 22 of the rubber hose 21 and is mixed with hot water.

In the present embodiment, since hot water does not flow directly into the heat-insulating rubber hose and hot water does not come into contact with the faucet body 1, even if the faucet is touched from the outside, there is no burn and safety. .

[0043]

【The invention's effect】

(1) The effects of the hot and cold water mixing faucet of the present invention are as follows. Since the inner surface of the flow path is formed of a heat insulating member, even if the outer surface of the faucet body is made of metal, the outer surface of the faucet does not become hot when hot water is used.

(2) Since the hot water flow path from the hot water supply port to the water discharge port is formed by a heat insulating member, even if the outer surface of the faucet body is made of metal, even when hot water is used, the outer surface of the faucet can be extended. Does not get hot.

(3) By surrounding the hot water flow path formed by the heat insulating member with the water flow path, the heat insulating effect can be increased.

(4) Up to the open / close valve can be constituted by a heat insulating member that can withstand the primary pressure, and the rest of the open / close valve can be constituted by a heat insulating member that can withstand the secondary pressure. Therefore, a heat insulating member corresponding to the strength can be used.

(5) Since the hot water flow path formed by the heat insulating member is provided with a communication port communicating with the water flow path, mixing of hot water and water can be performed satisfactorily.

(6) Since a check valve for preventing hot water from flowing back into the water flow path is provided at the communication port, high-temperature hot water does not flow into the water-side flow path. The heat insulating effect is good even if the heat treatment is provided.

(7) Since a part of the hot water flow path is made of a flexible resin material, the configuration of the hot water flow path into the faucet body is easy.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing a second embodiment of the present invention.

FIGS. 3A and 3B show a third embodiment of the present invention, wherein FIG. 3A is a perspective view and FIG.

FIG. 4 shows a fourth embodiment of the present invention, wherein FIG. 4- (a) is a perspective view and FIG. 4- (b) is a cross-sectional view.

5A and 5B show a fifth embodiment of the present invention, wherein FIG. 5- (a) is a perspective view, FIG. 5- (b) is a transverse sectional view, and FIG. 5- (c) is a longitudinal sectional view.

FIG. 6 is a partially cutaway front view showing an example of a conventional two-valve hot and cold water mixing faucet.

[Description of Signs] 1 faucet body 2 hot water supply pipe 3 water supply pipe 4 hot water side valve seat 5 acme screw 6 spindle 7 bush 8 handle 9 hot water supply valve 10 flat packing 11 hollow body 12 water side valve seat 13 handle 14 water supply valve 15 elbow 16 Outlet 17 O-ring 18 Callan 19 Check valve 20 Branch 21 Rubber hose 22 Water intake 23 Bellows 24 Opening and closing valve unit 25 Opening 26 Rubber connector 27 Inner pipe 28 Cylindrical body 29 Shower 30 Switching valve unit 31 Opening and closing valve unit 32 Hot water Exit 33 opening

Claims (8)

[Claims] 1. A hot and cold water mixing faucet wherein an inner surface of a flow path is formed of a heat insulating member. 2. The hot and cold water mixing faucet according to claim 1, wherein at least the inner surface of the hot water side flow path is formed of a heat insulating member. 3. The hot and cold water mixing faucet according to claim 2, wherein the hot water flow path from the hot water supply port to the water discharge port of the faucet main body is formed by a heat insulating member. 4. The hot and cold water mixing faucet according to claim 2, wherein a hot water flow path formed by a heat insulating member is surrounded by a water flow path. 5. The hot and cold water mixing faucet according to claim 4, wherein a part of the hot water flow path is made of a flexible resin material. 6. The hot and cold water mixing faucet according to claim 2, wherein an open / close valve is provided in the hot water flow path formed by the heat insulating member. 7. The hot water flow path formed by a heat insulating member is provided with a communication port communicating with the water flow path.
The hot and cold water mixing faucet according to any one of the above items. 8. The hot and cold water according to claim 7, wherein a check valve for preventing hot water from flowing back into the water flow path is provided at a communication port communicating with the water flow path in the hot water flow path formed by the heat insulating member. Mixing faucet.