JP3410265B2 - Hot water mixer tap - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing tap for mixing and discharging hot water and water, and more particularly to a hot and cold water mixing tap capable of stabilizing the mixing property of hot and cold water.

[0002]

2. Description of the Related Art In a hot and cold water mixing tap that mixes hot water and water and discharges it, the preset temperature of the mixed water changes due to fluctuations in water supply and hot water supply pressure. A thermostat mixing valve that has an automatic temperature control function to restore the original set temperature has been conventionally used.

In such a hot and cold water mixing tap, as means for detecting the temperature of the mixed water, for example, Japanese Utility Model Publication No. 61-4.
As described in Japanese Patent No. 4062, a temperature-sensitive spring made of a shape memory alloy has come to be used. This temperature-sensitive spring is a shape memory alloy that when set to a certain shape at a specific temperature, it will return to its original shape when the shape reaches a specific temperature, even if the shape is changed in a range other than this temperature range. It uses the characteristics.

The temperature-sensitive spring is incorporated so as to urge the control valve element, which comes into contact with and separates from the water-side and hot-water side valve seats on one axis, toward the hot water valve seat side. In order to set the balance of the control valve body in the axial direction, a structure is generally adopted in which a bias spring is arranged on the opposite side of the temperature sensitive spring to bias the control valve body toward the water valve seat. ing. Then, the temperature of the mixed water is set by adjusting the opening of each of the water valve seat side and the hot water valve seat side of the control valve body with the temperature setting handle. Then, when the temperature of the mixed water changes due to the supply pressure of water and hot water or the temperature change, the temperature sensitive spring expands and contracts to correct the temperature and maintain the temperature of the mixed water at the set temperature.

By the way, in a hot and cold water mixing tap using a temperature-sensitive member made of a shape memory alloy as an automatic temperature adjusting means, the sensitivity of the temperature-sensitive member is good and the responsiveness to a temperature change is good,
Although the temperature control can be performed accurately, the responsiveness deteriorates when the temperature sensitive member is separated from the hot and cold water mixing chamber, and therefore the temperature sensitive member needs to be disposed near the hot and cold water mixing chamber. Further, if the mixing of the hot water is insufficient, the temperature of the mixed water becomes uneven and the response of the temperature sensitive member becomes inaccurate. Therefore, it is necessary to mix the hot water sufficiently.

Conventionally, as this kind of hot and cold water mixing tap, a hot water inlet and a water inlet are provided at intervals in the axial direction,
A housing in which a hot and cold water mixing chamber is formed on the downstream side of the two inlets, and a control valve which is disposed in the housing so as to be slidable between the two inlets in the axial direction and controls an inflow amount of the hot water and the water. It is known that a body and a shape-memory alloy temperature-sensitive member that is arranged in a position near the hot and cold water mixing chamber in the housing and that controls sliding of the control valve body are known.

FIGS. 12 (a) and 12 (b) show an example of this kind of hot and cold water mixing tap. This hot and cold water mixing tap has a housing having a hot water inlet 2 on the upstream side and a water inlet 3 on the downstream side. 1
A control valve body 4 is slidably disposed therein, and a hot and cold water mixing chamber 5 is formed downstream of the water inlet 3. Both inlets 2 and 3 of this hot and cold water mixing tap are bored at a position of approximately 180 degrees in the circumferential direction. In addition to the illustrated example, there is a case where both the inlets 2 and 3 are provided at the same position in the circumferential direction.

[0008]

In the above-mentioned conventional hot and cold water mixing valve, since both inflow ports 2 and 3 are bored in a direction substantially opposite to each other in the circumferential direction, they flow in from both inflow ports 2 and 3. Both ends of the control valve body 4 are pressed by the hot water, and the control valve body 4 is pressed.
Since the axis of the control valve body 4 tilts with respect to the axis of the housing 1 with the center of the center as the base point, and the gaps between both ends of the control valve body 4 and water and the hot water valve seat do not reach predetermined values,
There is a problem that an accurate inflow amount cannot be obtained through water and the hot spring valve seat.

Both inlets 2 and 3 are approximately 18 in the circumferential direction.
The inflow speed of the hot water H and the water C into the housing 1 is high regardless of whether the holes 2 are provided at a position shifted by 0 degrees or the both inlets 2 and 3 are provided at the same position in the circumferential direction. Therefore, the hot water H and the water C tend to flow into the hot water / water mixing chamber 5 while being separated into two layers. In this case, the hot water H and the water C are insufficiently mixed to cause temperature unevenness, which is accurate. There is a problem that it is impossible to control the temperature properly.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a hot and cold water mixing tap capable of quickly and effectively mixing hot water and water and suppressing unevenness in hot and cold water temperature. To aim.

[0011]

In order to achieve the above-mentioned object, the present invention provides a hot water inlet and a water inlet which are axially spaced from each other, and a hot water mixing chamber is formed on the downstream side of these inlets. A housing; a control valve body disposed in the housing so as to be slidable in the axial direction between the both inlets, and for controlling an inflow amount of hot water and water; and arranged in a position near the hot water mixing chamber in the housing. A temperature-sensitive member made of a shape memory alloy, which is provided in the form of a coil and controls sliding of the control valve body;
In the hot and cold water mixing valve having the above-mentioned feature, the hot water inlet and the water inlet are provided at positions displaced from each other by 45 to 135 degrees in the circumferential direction. Further, by displacing the positions of both inflow ports, the hot water and the water do not flow in a laminar flow, and it is possible to significantly suppress the unevenness of the temperature of the mixed water.

The present invention is also characterized in that the water inlet is located downstream of the hot water inlet. Thus, the hot water inlet can be provided at a position close to the hot water supply pipe, and the hot water can be promptly introduced into the hot water mixing chamber without being circulated in the housing.

The present invention is also characterized in that two downstream inlets are provided at intervals in the circumferential direction. As a result, water or hot water is more dispersed and flows in, and the mixing property can be more stabilized. Stabilization of this mixed property, two inlets,
It is most effective to provide them at positions shifted by approximately 180 degrees in the circumferential direction.

The present invention also provides a hot water inlet and a water inlet.
It is characterized in that it is provided at a position shifted by approximately 90 degrees in the circumferential direction. And thereby, it becomes possible to mix hot water and water more quickly and effectively.

[0015]

According to the present invention, the housing comprises an outer housing and a cylindrical inner housing made of synthetic resin, which is inserted into the outer housing over its entire length, and has a hot water inlet and a water inlet. Is formed in the peripheral surface of the inner housing, and a water chamber is formed between the two housings to guide the water from the water supply pipe in the axial direction to the water inlet. As a result, the water flowing in the axial direction changes its direction at the water inlet and flows in the radial direction, facilitating the dispersion / diffusion of water and enabling more effective mixing with hot water. Become. Also, depending on the water chamber,
It is possible to suppress the temperature rise on the outer housing surface.

The present invention further comprises a housing made of a casting, and a cylindrical heat insulating bush fitted in a part of the housing in the axial direction, wherein the hot water inlet and the water inlet are provided with the heat insulating material. A water chamber is formed in the peripheral surface of the bush, and the housing is provided with a water chamber in which water from the water supply pipe is caused to flow in the axial direction to be guided to the water inlet. Also in this case, the water flowing in the axial direction changes its direction at the water inlet and flows in the radial direction.
Diffusion is promoted and mixing with hot water can be performed more effectively. Further, the water chamber makes it possible to suppress the temperature rise on the outer surface of the housing.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a hot and cold water mixing tap according to a first embodiment of the present invention. In the figure, reference numeral 11 is a main body of the hot and cold water mixing tap, and the back of the hot water mixing tap has a water supply on the building side and Water leg pipe 11a and hot water leg pipe 11b connected to the hot water supply pipe
Is provided. A water discharge pipe 11c is connected to the center of the lower end of the main body 11, and a hose 11d directed to a shower head (not shown) is provided on the back side thereof. A switch handle 12 is provided at the right end of the main body 11 to switch the flow path to the water discharge pipe 11c side and the hose 11d side and to adjust the flow rate, and at the left end of the main body 11 to adjust the temperature of the mixed water. Temperature control handle 13 for
Is provided.

As shown in FIGS. 2 to 4, the main body 11 is made of, for example, a metal outer cylindrical housing 14 having a cylindrical shape.
And a cylindrical inner housing 15 made of synthetic resin and fitted in the outer housing 14 with both ends protruding, and the switching cartridge is inserted into the inner housing 15 from both ends thereof. The unit 16 and the temperature control cartridge unit 17 are inserted and arranged respectively.

The switching cartridge unit 16 is provided with a cylindrical case 18 for a switching valve that is inserted and fixed in the inner housing 15. Inside the case 18,
A sleeve-shaped switching valve body 18a connected to the switching handle 12 via a spindle 18b is rotatably inserted and arranged. The flow path is switched by the relative rotation of the switching valve body 18a with respect to the case 18 accompanying the operation of the switching handle 12, and the hot and cold mixed water is discharged to the discharge pipe 11c side or the hose 1.
It is adapted to be selectively supplied to the 1d side.

On the other hand, the temperature control cartridge unit 16
Has an outer shell structure in which the first, second, and third housings 19, 20, and 21 are integrated by screw joining in order from the temperature adjustment handle 13 side. A spindle 19a connected to the temperature control handle 13 is rotatably incorporated in the first housing 19, and a spindle 19a is provided between the first housing 19 and the spindle 19a.
A slide block 19b in which a screw 19c is joined to a is provided. The slide block 19b moves only in the axial direction with respect to the first housing 19 by key joining or the like and does not rotate around the axial line.
A screw gear mechanism is configured with the spindle 19a. A hot water valve seat 19d on which a control valve body 22 to be described later is mounted / separated is formed at the tip of the first housing 19.

A control valve body 22 having a cylindrical shape is incorporated in the second housing 20 so as to be movable in the axial direction. The control valve body 22 is formed at the end of the third housing 21. The temperature of the mixed water can be adjusted by moving between the water valve seat 21a and the hot water valve seat 19d and setting the valve opening degree between these valve seats 19d and 21a.

Through the control valve body 22, the control valve body 22 is shifted in the axial direction by the temperature adjusting handle 13 to set the valve opening degree on both sides of the control valve body 22, and temperature fluctuations of water supply, hot water supply, etc. Since the control valve body 22 is operated so as to reach the set temperature corresponding to the change in the temperature of the mixed water due to, the bias spring 23 and the temperature-sensitive spring 24 are arranged at positions facing each other with the control valve body 22 in between. Has been done.

The bias spring 23 has a shorter natural length than that of the bias spring 23, and is housed in the first housing 19 as a unit which has been compressed and deformed in advance. Due to this unitization, a holding seat 26 having an outer shape that can move only in the axial direction without rotating in the first housing 19 around the center, a head 27 that abuts against the control valve element 22, and these holding seats 26 and the head. Hook 28 connecting between 27
Is equipped with. The holding seat 26 abuts against the tip of the slide block 19b and moves in the axial direction as the slide block 19b moves.

The temperature sensitive spring 24 is provided in the third housing 2
The shape memory alloy is arranged in the hot and cold water mixing chamber 25 formed in the first housing 1, and the spring constant of which changes according to the temperature fluctuation of the mixed water passing through the third housing 21.

That is, since the temperature-sensitive spring 24 is made of the shape memory alloy, when the temperature of the mixed water becomes higher than the set value, the temperature-sensitive spring 24 is deformed so that the axial length becomes longer, and the guide sleeve 29 is inserted. Control valve body 22
Is moved to the bias spring 23 side. As a result, the valve opening with the hot water valve seat 19d becomes smaller, the valve opening with the water valve seat 21a becomes larger, the mixing ratio of water in the mixed water increases, and the mixed water temperature is set. Lower to value. On the contrary, when the temperature of the mixed water becomes lower than the set value, the temperature-sensitive spring 24 contracts and deforms to cause the water valve seat 21 to move.
By decreasing the valve opening on the side a, decreasing the inflow amount of water, and increasing the inflow amount of hot water, the mixed water temperature is returned to the set value as described above.

A vane 29a is provided on the inner peripheral surface of the end of the guide sleeve 29 on the side of the control valve body 22 for swirling the water flowing in through the water valve seat 21a around the core of the guide sleeve 29 to stir the flow. A heat insulating spacer 30 made of synthetic resin is interposed between the guide sleeve 29 and the temperature sensitive spring 24.

On the other hand, the inner housing 15 is provided with one hot water inlet 31 on the upstream side and two water inlets 32 on the downstream side. These water inlets 32 are provided at positions opposite to each other with a circumferential offset of approximately 180 degrees, and the hot water inlet 31 and the water inlet 32 are circumferentially 45 to 135 degrees, more preferably 90 degrees. They are provided at positions (90 degrees in the drawing) shifted. Further, the hot water inlet 31 is opened on the wall surface side of the building, and the hot water supply pipe 3
The hot water from 3 can be made to flow into the inner housing 15 at the shortest distance.

Further, as shown in FIGS. 3 to 5, the water inlet 32 is opened vertically and is provided at a position deviated from the water supply pipe 34 by 90 degrees in the circumferential direction. The water from the water supply pipe 34 flows in the water chamber 35 formed between the housings 14 and 15 in the axial direction, and then changes in the radial direction at the upper and lower water inlets 32 to change the inner housing 15 to a radial direction.
Flows in.

Incidentally, the temperature control cartridge unit 1
As shown in FIG. 5, the hot water inlet 36 and the water inlet 37 of No. 7 are opened almost all around the connecting portion, and the inflow of hot water and water is blocked at the respective inlets 36 and 37. It has been taken into consideration.

Next, the operation of this embodiment will be described.

Hot water from the hot water supply pipe 33 flows into the inner housing 15 through the hot water inlet 31 and flows into the hot water mixing chamber 25 through the hot water inlet 36 and the hot water valve seat 19d. On the other hand, the water from the water supply pipe 34 flows in the water chamber 35 in the axial direction and then splits into two, and changes in the radial direction at each water inlet 32 and flows into the inner housing 15. Then, it flows into the hot and cold water mixing chamber 25 through the water inlet 37 and the water valve seat 21a. Then, it is mixed with hot water in the hot water mixing chamber 25.

By the way, the hot water inlet 31 is opened on the wall surface side of the building, and therefore the hot water from the hot water supply pipe 33 flows into the inner housing 15 at the shortest distance. Therefore, the temperature rise of the main body 11 can be suppressed and the temperature decrease of the hot water can be suppressed.

Water from the water supply pipe 34 is supplied to the water chamber 35.
After flowing in the inside in the axial direction, the direction is changed to the radial direction at the water inlet 32 to flow into the inside housing 15.
For this reason, when the direction is changed, the water diffuses and can be more sufficiently mixed with the hot water. Further, since the two water inlets 32 are provided and the positions thereof are shifted by about 180 degrees, the water is mixed from both the upper and lower directions with respect to the flow of the hot water, and the mixing with the hot water is more effective. It can be carried out. Further, since each water inlet 32 is displaced by 90 degrees in the circumferential direction with respect to the water supply pipe 34, the water pressure is weakened and the dispersion / diffusion efficiency of water when flowing from the water inlet 32 into the inner housing 15 is reduced. Can be further improved. Further, since the both water inlets 32 are provided at positions displaced by 90 degrees in the circumferential direction with respect to the hot water inlet 31, the hot water and the water are efficiently mixed, and the temperature unevenness of the mixed water is significantly suppressed. You can

FIGS. 6 to 8 show a second embodiment of the present invention, in which a body 41 is used instead of the body 11 in the first embodiment.

That is, the main body 41 is provided with a housing 42 made of casting and a cylindrical heat insulating bush 43 fitted in a part of the housing 42 in the axial direction,
The heat insulating bush 43 is provided with one hot water inlet 44 on the upstream side and two water inlets 45 on the downstream side.
Is provided.

As shown in FIG. 7, the hot water inlet 44 is open on the wall surface side of the building, and the hot water from the hot water supply pipe 46 can be introduced into the heat insulating bush 43 at the shortest distance.

The two water inlets 45 are provided in the circumferential direction at positions shifted by about 180 degrees from each other, and are opened in the vertical direction. Therefore, the water inlet 4
5 is in a state of being provided at a position displaced by 90 in the circumferential direction with respect to the hot water inlet 44. Further, in the housing 42, as shown in FIG. 7, a water chamber 48 is provided which guides the water from the water supply pipe 47 to the respective water inlets 45 after flowing the water in the axial direction. The water supply pipe 47 and each water inlet 45 are provided at positions displaced by 90 degrees in the circumferential direction.

In other respects, the structure is the same as that of the first embodiment and the operation is the same.

As described above, even when the main body 41 having the housing 42 and the heat insulating bush 43 is used, the same effect as that of the first embodiment can be obtained.

In both of the above-mentioned embodiments, the case where the two water inlets 32 and 45 are provided at positions shifted by approximately 180 degrees in the circumferential direction has been described, but it is not necessarily limited to 180 degrees. However, other angles may be used. Also, the water inlets 32 and 45 are not always 2
It is not necessary to provide one by one, and as long as it is provided at a position displaced by 45 to 135 degrees in the circumferential direction with respect to the hot water inlets 31 and 44,
For example, as shown in FIGS. 9A and 9B, the water inlet 3
Even with one 2,45, the expected effect can be expected.

Further, in the above-mentioned both embodiments, the case where the hot water inlets 31 and 44 are provided on the upstream side and the water inlets 32 and 45 are provided on the downstream side has been described, but both the inlets 31, 44 and 32 are provided. , 45 may be installed at opposite positions.

Further, in the above both embodiments, the case where the temperature sensitive spring 24 is used as the temperature sensitive member has been described, but it is not necessarily required to be a coil shape as long as it has a shape that easily thermally expands.

[0045]

EXAMPLES The present inventors conducted an experiment on the relationship between the positional deviation angle in the circumferential direction between the hot water inlets 31, 44 and the water inlets 32, 45 and the change in the discharge water temperature.

As shown in FIG. 10, the experiment was carried out for the case where the water indicated by the reference symbol C was made to flow from one water inlet port and the case where the water was introduced at the two water inlet ports provided facing each other. The positional deviation angles in the circumferential direction with respect to the hot water inlet, through which the hot water flows, were 0 degrees, 45 degrees, 90 degrees, 135 degrees, and 180 degrees.

The experimental conditions are as follows. Water supply pressure 2 kgf / cm ² Water supply temperature 5 ° C. Hot water supply pressure 2-4 kgf / cm ² Hot water supply temperature 85 ° C. As a result of the above experiment, the results shown in FIG. 11 were obtained.

FIG. 11 shows the positional deviation angle between the hot water inlet and the water inlet on the horizontal axis, and the discharge water temperature change on the vertical axis. The change in the discharge water temperature with one water inlet and with two water inlets. Is shown. In the figure, the white circle graph shows the case where there is one water inlet, and the black circle graph shows the case where there are two water inlets.

As is apparent from FIG. 11, the change in discharge water temperature is smaller when two water inlets are provided than when one water inlet is provided, and the positional deviation angle is 90 degrees in any case. I understand. If the change in discharge water temperature is 2 ° C, the allowable limit is 4 ° C, and the limit is 4 ° C.
It can be seen that in both the case of two pieces and the case of two pieces, the positional deviation angle may be within the range of approximately 45 to 135 degrees.

[0050]

As described above, according to the present invention, in a hot and cold water mixing valve having a housing, a control valve body and a temperature sensitive member, the hot water inlet and the water inlet are 45 to 135 degrees in the circumferential direction. Since the hot water and water are effectively mixed by stirring without being formed as a two-layer flow, the unevenness of the temperature of the mixed water can be significantly suppressed.

Further, according to the present invention, since the water inlet is located on the downstream side of the hot water inlet, the hot water inlet is provided in a position close to the hot water supply pipe, and the hot water is quickly supplied without circulating the hot water in the housing. It can be introduced into the mixing chamber, the risk of the outer surface of the housing becoming hot can be prevented, and
The temperature drop of hot water can be prevented.

Further, according to the present invention, since two downstream inlets are provided at intervals in the circumferential direction, hot water or water can be introduced in a more dispersed manner from the downstream inlets. It is possible to further stabilize the mixing property.

The present invention also provides a hot water inlet and a water inlet.
Since they are provided at positions shifted by 90 degrees in the circumferential direction, hot water and water can be mixed more quickly and effectively, and the temperature of the mixed water can be stabilized.

Further, in the present invention, since the temperature sensitive member is formed in a coil shape, the sensitivity of the temperature sensitive member to the temperature change is improved and the responsiveness can be further improved.

According to the present invention, the housing is composed of an outer housing and a cylindrical inner housing made of synthetic resin, which is inserted into the outer housing over its entire length, and has a hot water inlet and a water inlet. Is bored in the peripheral surface of the inner housing, and a water chamber is formed between the two housings to guide the water from the water supply pipe in the axial direction to the water inlet. The incoming water changes its direction at the water inlet and flows in the radial direction, which promotes the dispersion and diffusion of water and allows more effective mixing with hot water. Further, the temperature of the outer housing surface can be suppressed by the water chamber.

The present invention further comprises a housing made of a casting, and a cylindrical heat insulating bush fitted in a part of the housing in the axial direction, wherein the hot water inlet and the water inlet are Since the water chamber is formed in the peripheral surface of the heat insulating bush and the housing is provided with a water chamber that allows the water from the water supply pipe to flow in the axial direction to the water inlet, the water flowing in the axial direction is By changing the direction at the inlet and flowing in the radial direction, dispersion / diffusion of water is promoted and mixing with the hot water can be performed more effectively. Further, since the water chamber is provided, the temperature rise on the outer surface of the housing can be suppressed.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a hot and cold water mixing valve according to a first embodiment of the present invention.

2 is a cross-sectional view showing the internal structure of the main body of FIG.

FIG. 3 is an exploded cross-sectional view showing a state in which both cartridge units are pulled out from the main body.

FIG. 4 is a sectional view showing a state in which the main body is cut along a plane orthogonal to FIG.

FIG. 5 is an exploded perspective view showing external configurations of an inner housing and a temperature adjustment cartridge unit.

FIG. 6 is a cross-sectional configuration diagram of essential parts showing a hot and cold water mixing valve according to a second embodiment of the present invention.

7 is a cross-sectional view showing the internal structure of the main body of FIG.

8 is a perspective view showing an external configuration of the heat insulating bush of FIG.

9A and 9B are schematic configuration diagrams showing a mixed state of hot and cold water when there is one water inlet.

FIG. 10 is an explanatory diagram showing the contents of an experiment conducted by the present inventors.

FIG. 11 is a graph showing the results of experiments conducted by the present inventors.

12 (a) and (b) are schematic configuration diagrams showing a mixed state of hot and cold water when the hot water inlet and the water inlet are provided at positions displaced by approximately 180 degrees in the circumferential direction.

[Explanation of symbols]

11,41 body 12 Switching handle 13 Temperature control handle 14 Outer housing 15 Inner housing 16 Switching cartridge unit 17 Temperature control cartridge unit 19 First housing 19d Yubenza 20 Second housing 21 Third Housing 21a Water valve seat 22 Control valve body 23 Bias spring 24 Temperature Sensitive Spring 25 hot water mixing room 31,44 Hot water inlet 32,45 water inlet 33,46 Hot water supply room 34,47 Water supply room 35,48 water chamber 42 housing 43 Insulated bush H hot water C water

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-294475 (JP, A) JP-A-58-94537 (JP, A) Real-life Sho-49-28738 (JP, U) Actual Kai-hei-6- 43456 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16K 11/00-11/24 F16K 31/70

Claims (7)

(57) [Claims] 1. A housing in which a hot water inlet and a water inlet are provided at intervals in the axial direction, and a hot and cold water mixing chamber is formed on the downstream side of these inlets; A control valve body movably disposed in the housing for controlling an inflow amount of hot water and water, and a coil disposed in the housing in the vicinity of the hot water mixing chamber for controlling sliding of the control valve body. In a hot and cold water mixing valve comprising a temperature-sensitive member formed in a shape of a shape memory alloy, the hot water inlet and the water inlet are provided at positions displaced from each other by 45 to 135 degrees in the circumferential direction. A hot and cold water mixing tap. 2. The hot and cold water mixing valve according to claim 1, wherein the water inlet is located downstream of the hot water inlet. 3. The inflow port on the downstream side is provided at two circumferentially spaced intervals.
The hot and cold water mixing tap described. 4. The two water inlets are provided at positions displaced by approximately 180 degrees in the circumferential direction.
The hot and cold water mixing tap described. 5. The hot water inlet and the water inlet are approximately 9 in the circumferential direction.
The hot and cold water mixing valve according to claim 1, wherein the hot and cold water mixing valve is provided at a position offset by 0 degree. 6. The housing comprises an outer housing and a cylindrical inner housing made of synthetic resin, which is inserted into the outer housing over its entire length, and the hot water inlet and the water inlet are the inner side. 2. A water chamber, which is formed in the peripheral surface of the housing, and between the two housings, there is formed a water chamber in which water from the water supply pipe is caused to flow in the axial direction to be guided to the water inlet. Hot and cold water mixing tap. 7. The housing comprises a housing made of cast metal and a cylindrical heat insulating bush fitted in a part of the housing in the axial direction, and the hot water inlet and the water inlet are surrounded by the heat insulating bush. 2. The hot and cold water mixing tap according to claim 1, wherein a water chamber is formed in the surface, and the housing is provided with a water chamber in which water from the water supply pipe is caused to flow in the axial direction to be guided to the water inlet.