JPH0734266U - Hot and cold water mixing tap - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a hot and cold water mixing tap capable of sufficiently mixing water and hot water even if there is a difference in water supply pressure and hot water supply pressure and discharging as a regular flow. [Structure] A water supply port 2a and a hot water supply port 3a are provided separately from each other in the main body 1, and a water supply port 2a and a hot water supply port 3a are provided.
The water discharge pipe 4 is projected from almost the center between the
A mixing wall 6 for squeezing the flow path cross section to reduce the flow path cross section to straighten the flow toward the water discharge port at the tip or guide walls 8a and 8b for dividing the flow path cross section into a plurality of parts is provided, The non-uniform flow afterward is corrected by the throttle portion or the guide walls 8a and 8b, rectified, and can be discharged from the water discharge port 4a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hot and cold water mixing tap in which water side and hot water side supply parts are arranged on the left and right sides of the main body, and a spout is arranged at the center side. The present invention relates to a hot and cold water mixing tap designed for rectification.

[0002]

[Prior art]

 The simplest type of hot and cold water mixing tap that mixes and discharges water and hot water has a water valve on the right side and a hot water valve on the left side of the main body, and a water discharge pipe protruding to the front in the center. Is to be equipped with. The valves for water and hot water are opened and closed by the operating handles connected to them, and the temperature of the mixed water is set by the mixing ratio of water and hot water according to the opening.

When the hot and cold water mixing tap is used, for example, in a general household, the main body is connected to a water supply pipe and a hot water supply pipe. In this case, the water supply pipe is often a branch pipe from a tap water pipe, and the hot water supply pipe is connected to, for example, an electric water heater.

In such water supply and hot water supply pipes, the pressure is higher on the water supply side directly connected to the tap water pipe and lower on the hot water supply side. For this reason, even if the water valve side and the hot water side are set to the same valve opening degree by the operation handle, the inflow amount into the main body is large because the pressure on the water supply side is high. Therefore, if the water discharge pipe is located in the center of the main body, not only the mixing of water and hot water is not sufficient, but also the tendency for water to be discharged first becomes strong, and inconvenience is likely to occur especially when starting use. .

On the other hand, as described in, for example, Japanese Utility Model Publication No. 56-32690, a protruding wall that obstructs the flow is provided in the flow path from the inflow section on the water side and the inflow section toward the discharge pipe. Some of them are designed to promote mixing. If such a protruding wall is provided, even if there is a difference in the supply pressure between the hot water supply and the hot water supply, the discharge wall acts to stir the flow toward the discharge port side, and the preceding discharge of water and The lack of mixing can be suppressed.

[0006]

[Problems to be solved by the device]

 However, even if the mixing can be promoted by the projecting wall, the flow of the mixed water toward the discharge pipe is discharged while receiving the propagation of stirring by the projecting wall. Such turbulence of the flow of the mixed water in the internal flow path up to the discharge pipe can be regarded as a continuous pressure fluctuation of the internal flow when viewed from the cross section of the flow path, and the discharge of the mixed water discharged from the discharge pipe This effect also appears.

[0007] For example, if the pressure fluctuation is severe, the water discharge from the discharge pipe may be slightly delicate and unstable, and the water discharge may become unstable depending on the shape of the internal flow path of the water discharge pipe. The streamline is twisted and gives an unnatural feeling.

As described above, the provision of the protruding wall can eliminate the poor mixing due to the difference between the water supply pressure and the hot water supply pressure, but there is an aspect to be improved from the viewpoint of adjusting the finally mixed water.

The problem to be solved in the present invention is to provide a hot and cold water mixing tap capable of sufficiently mixing water and hot water even if there is a difference between the water supply pressure and the hot water supply pressure and discharging as a regular flow. is there.

[0010]

[Means for Solving the Problems]

 The present invention is a hot and cold water mixing tap having a water supply port and a hot water supply port separated from each other in a main body, and a water discharge pipe protruding from the main body at a center between the water supply port and the hot water supply port. The water discharge pipe is characterized in that the water discharge pipe is provided with a throttle portion for reducing the cross section of the flow path and rectifying the flow toward the water discharge port at the tip.

The throttle portion is formed by a straightening wall that is erected on the bottom wall inside the water discharge pipe, and this straightening wall is provided with a cutout whose central portion is lower than the remaining left and right portions. In addition, the straightening wall may protrude downward from the upper wall inside the discharge pipe, and a notch may be provided in the central portion so that the flow passage cross section is larger than the remaining left and right portions. .

Further, a guide wall may be provided inside the water discharge pipe so as to divide the cross section of the flow passage into a plurality of pieces in the width direction.

Further, a shielding wall for diverting water from the water supply port toward the hot water supply port side may be provided inside the main body at a position biased to the water supply port side.

[0014]

[Action]

 Even when the water supply pressure is higher and the water flow is more dominant than the hot water flow, the restriction provided in the discharge pipe cancels out the non-uniformity of the water and hot water flow on the upstream side. The flow to the outlet side is blocked and the flow to the outlet side is rectified to a stable flow. Further, the contraction and expansion of the flow passage by the throttle portion promotes the mixing of water and hot water.

When the throttle portion is formed by a rectifying wall provided on the bottom wall side or the upper wall side inside the water discharge pipe, the notch in the center portion divides the internal flow into three layers in the width direction within the cross section of the flow path. In this way, directivity is given to the flow passing through the notch, and good rectification is possible.

Further, in the case where the guide wall that divides the flow path cross section into a plurality of parts is provided, it is rectified while passing through the guide wall, and the turbulence of the flow due to the difference in supply pressure between water and hot water on the upstream side is corrected This enables stable discharge from the spout.

Further, in the case where the shielding wall is provided on the water supply port side in order to prevent uneven flow due to the difference between the water supply pressure and the hot water supply pressure, the water and the hot water are mixed well and the water supply port side Even if there is a bypass flow to the, the flow is rectified by providing a throttle and a guide wall inside the discharge pipe.

[0018]

【Example】

 1 is a cutaway plan view showing an embodiment of the hot and cold water mixing valve of the present invention, FIG. 2 is a left side view of the cutout, and FIG. 3 is a vertical sectional view taken along the line AA of FIG.

In the figure, a handle 2 for water and a handle 3 for hot water are provided on the right side and the left side of the upper surface of the body 1 of the hot and cold water mixing valve manufactured by the casting method, respectively.

The water handle 2 is, as described in, for example, the one filed by the applicant of the present application as Japanese Patent Application No. 54-13294 and published as Japanese Utility Model Application No. 55-113871. Is provided with a coma-type valve body that opens and closes a flow path from the water supply port 2a provided on the lower surface of Then, by turning the water handle 2, the valve body comes into contact with or separates from the valve seat communicating with the water supply port 2a, and the opening can be changed to set the flow rate.

On the other hand, the hot water handle 3 has a similar structure, and can be provided with a valve body that can be brought into and out of contact with a valve seat communicating with the hot water supply port 3a opened on the lower surface of the main body 1.

The main body 1 is integrally provided with a water discharge pipe 4 protruding forward with an obliquely upward inclination, and a water discharge port 4a is opened on the lower surface of the tip thereof. A rectifying net 4b having a plurality of meshes is provided in the water discharge port 4a.

A shielding wall 5 that partially blocks a flow path from the water supply port 2a to the inside of the water discharge pipe 4 is provided on an inner wall of the water discharge pipe 4 on the side of the water supply port 2a. As shown in FIG. 2, this barrier wall 5 is formed over the bottom wall, side wall and upper wall inside the main body 1, and its direction is directed to the hot water supply port 3a as shown in FIG. ing. With the shielding wall 5 arranged in this way, the flow of water from the water supply port 2a side flows toward the water discharge pipe 4 side while hitting the shielding wall 5 and diverting to the hot water supply port 3a side.

Therefore, when the flow paths on the side of the water supply port 2a and the side of the hot water supply port 3a are opened at the same time, the water supply actively flows into the hot water side, and even if the water supply pressure is higher than the hot water supply pressure, Only water does not flow into the water discharge pipe 4 side in advance, and the mixing of water and hot water is promoted.

Further, as shown in FIG. 2, a flow straightening wall 6 is provided as a throttle portion at the base end of the portion inside the water discharge pipe 4 where the flow passage area is uniformed up to the water discharge port 4a. . As shown in FIG. 3, the flow straightening wall 6 has a shape that rises from the bottom wall 4c of the water discharge pipe 4 to the entire length in the width direction of the flow path cross section, and has a notch 6a that is slightly lower only in the central portion when viewed from the front. It is a thing.

In the above configuration, when the flow paths from the water supply port 2 a and the hot water supply port 3 a are opened by the water handle 2 and the hot water handle 3, water and hot water are respectively supplied from these supply ports 2 a and 3 a. Flows into the main body 1. At this time, the water temporarily flows to the hot water supply port 3a side by the shielding wall 5, and flows into the water discharge pipe 4 obliquely from the left side as shown in FIG.

In response to such a flow, the flow passage area is sharply narrowed by the straightening wall 6 which is the base end portion of the water discharge pipe 4 and which rises on the bottom wall 4c thereof. This throttle acts as a resistance against the flow of the mixed water, and interferes with the direction of the flow of the mixed water of the water and the hot water by the shielding wall 5. Since the straightening wall 6 does not have a constant height and has the notch 6a at the center thereof, the portion of the flow toward the spout 4a that passes through the notch 6a is not only in the vertical direction of the flow passage cross section but also in the width direction. Give a diaphragm. Therefore, when the flow passes through the flow straightening wall 6, the interference acts to offset the bypass flow of the mixed water by the shielding wall 5 and to correct the flow by the notch 6a. Can be rectified.

As described above, even if the flow is such that the water is diverted to the hot water side by the shielding wall 5 and the water is forcibly mixed, the flow is stabilized by providing the straightening wall 6 in the water discharge pipe 4. Can be discharged from the water discharge port 4a. Further, even when passing through the straightening wall 6, the mixing of water and hot water is further promoted, and discharge in a sufficiently mixed state becomes possible.

FIG. 4 shows an example in which a straightening wall provided in the throttle portion is provided on the upper wall side inside the water discharge pipe 4. (a) of the same figure is a left side view of the cutout of the hot and cold water mixing plug, and (b) of the same figure. 8B is a vertical sectional view taken along the line BB of FIG.

The flow regulating wall 60 provided in the water discharge pipe 4 as a throttle portion is provided so as to protrude downward from the upper wall 4d on the side closer to the water discharge port 4a as compared with the above example. The straightening wall 60 has a shape that is substantially symmetrical with respect to the shape of the straightening wall 6 provided on the bottom wall 4c shown in FIG. 3, and has a notch 60a that is convex upward in the central portion. It is provided.

Even when such a flow straightening wall 60 is provided, the bypass flow of the mixed water due to the shielding wall 5 is canceled and the flow is straightened by the notch 60a to straighten the flow to the water outlet 4a as in the previous example. Is possible. In particular, when the water supply pressure and the hot water supply pressure are high, when the straightening wall 6 is provided on the bottom wall 4c as in the above example, there is a possibility that the mixed water may flow upward in the water discharge pipe 4. However, if the flow regulating wall 60 is provided on the upper wall 4d, the degree to which the flow along the bottom wall 4c is disturbed is reduced, and stable water discharge is possible.

5 to 8 show another embodiment. FIG. 5 is a cutaway plan view of the hot and cold water mixing stopper, and FIG. 6 is a cutaway left side view. The same members as those in the previous example are designated by common reference numerals, and detailed description thereof will be omitted.

In the figure, a straightening wall 7 that narrows the width direction of the cross section of the flow path is provided at the base end portion of the water discharge pipe 4. As shown in FIG. 7 (longitudinal sectional view taken along the line CC in FIG. 4), the straightening wall 7 has an opening 7a having a constant width formed in the central portion.

Even with the flow straightening wall 7 having such an opening 7a, the water in the bypass flow by the upstream shielding wall 5 and the flow in the discharge pipe 4 in which the elements of the flow are propagated in connection with the bypass flow. Can be rectified, and stable discharge from the water discharge port 4a is performed.

FIG. 8 is a vertical sectional view showing another example of the flow regulating wall 7. In FIG. 8, (a) is an inverted triangular opening 7b, and (b) is a circular opening 7c. In addition, the flat cross-shaped opening 7d is shown in FIG.

In the shape of the opening 7b in FIG. 4A, the wall rises obliquely upward from the bottom wall of the water discharge pipe 4 and restricts the flow not only in the vertical direction but also in the width direction. Correct the flow after the detour. Similarly, in the case of the circular opening 7c shown in FIG. 2B, the flow passage surface is squeezed by the entire circumference, so that the flow toward the discharge port 4a can be corrected. Further, even when the cross-shaped opening 4d of (c) in the figure is used, the flow of the mixed water after the detour and the flow in the vertical and horizontal directions in the flow path are corrected, and the water discharge port 4a. The flow toward is rectified.

9 to 12 show another embodiment, FIG. 9 is a cutaway plan view of the hot and cold water mixing tap, and FIG. 10 is a cutaway left side view.

At the base end of the water discharge pipe 4, two guide walls 8a and 8b are provided in the width direction, and as shown in FIG. 11 (longitudinal sectional view taken along the line DD of FIG. 9), The road section is divided into three sections. As shown in FIG. 10, these guide walls 8a and 8b are made to have a certain length in the flow direction so as to give directionality to the flow of the mixed water passing between them.

In the case where such guide walls 8a and 8b are provided, the flow around the shielding wall 5 after the detour is corrected so as to go straight toward the water discharge port 4a. Since the flow passage cross section is divided into three sections by the guide walls 8a and 8b, the flow passing through each is rectified so that the influence of the bypass on the upstream side is attenuated. Therefore, it is possible to stably discharge the mixed water from the water discharge port 4a.

FIG. 12 shows an example in which three guide walls 8c, 8d, 8e are provided.

The central guide wall 8d is located slightly upstream of the guide walls 8c and 8e located on the left and right sides thereof, and only the front end portion and the rear end portions of the guide walls 8c and 8e overlap with each other when viewed in the flow direction. ing. Therefore, in this portion, the flow path cross section is divided into four as shown in the same figure (b) (longitudinal sectional view taken along the line EE of the same figure (a)), and the downstream side thereof is the same as in FIG. Is divided into three parts.

In such an arrangement of the guide walls 8c to 8e, the flow of the mixed water is first divided into two by the central guide wall 8d, and then divided into four by the guide walls 8c and 8e. By giving such a two-stage division to the flow, it is possible to more efficiently direct the flow by the arrangement of the guide walls 8c to 8e, and to rectify the flow of the mixed water toward the outlet 4a. Is done.

Here, in each of the above examples, the main body 1 is provided with the shielding wall 5 that diverts the water supply from the water supply port 2a toward the hot water supply port 3a, but this is not the case. However, it goes without saying that the mixed water to the water discharge port 4a can be rectified. That is, even when the water supply pressure is higher than the hot water supply pressure and water precedes, the flow is corrected by the restriction by the flow straightening walls 6 and 7 and the restriction by dividing the flow paths of the plurality of guide walls 8a to 8c. At the same time, mixing is promoted. Therefore, even under the water discharge condition without the shielding wall 5, which is easily affected by the difference between the water supply pressure and the hot water supply pressure, it is necessary to provide such straightening walls 6 and 7 and the guide walls 8a to 8c for stable water discharge. It is extremely effective.

[0044]

[Effect of device]

 In the present invention, the turbulence of the flow when water and hot water are mixed can be directed to the spout side by cutting off the turbulence on the upstream side by means of the throttle portion and the guide wall. For this reason, even if there is a difference between the water supply pressure and the hot water supply pressure, this can be absorbed and rectified, and stable water discharge without pulsation or twisting of streamlines can be performed.

Further, even when a shielding wall is provided on the side of the water supply port to divert water to the side of the hot water supply port, the flow can be similarly rectified by the throttle portion and the guide wall, and good mixing and rectification by the shielding wall can be performed simultaneously. Can be achieved.

[Brief description of drawings]

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

2 is a cutaway left side view of the hot and cold water mixing valve of FIG. 1. FIG.

FIG. 3 is a vertical sectional view taken along the line AA of FIG.

FIG. 4 is an example in which a straightening wall is provided on the upper wall inside the water discharge pipe, in which FIG. It is a longitudinal cross-sectional view taken along the line BB of FIG.

FIG. 5 is a cutaway plan view showing another embodiment of the hot and cold water mixing valve of the present invention.

6 is a cutaway left side view of the hot and cold water mixing valve of FIG. 5. FIG.

7 is a vertical sectional view taken along the line CC of FIG.

FIG. 8 is a vertical cross-sectional view of a main part showing another example of the shape of the opening provided in the flow regulating wall.

FIG. 9 is a cutaway plan view showing an embodiment in which a guide wall is provided on a water discharge pipe.

10 is a cutaway left side view of the hot and cold water mixing valve of FIG. 9. FIG.

11 is a vertical sectional view taken along the line DD of FIG.

FIG. 12 is an example in which three guide walls are provided, (a) of the same figure is a cutaway plan view of the tip end portion of the water discharge pipe, (b) of the same figure is a EE line of (a) of the same figure. It is a longitudinal cross-sectional view by an arrow.

[Explanation of symbols]

 1 Main body 2 Water handle 2a Water supply port 3 Hot water handle 3a Hot water supply port 4 Water discharge pipe 4a Water discharge port 4c Bottom wall 4d Upper wall 5 Barrier wall 6 Rectification wall 6a Notch 7 Rectification wall 7a, 7b, 7c Opening 8a, 8b , 8c Guide wall 60 Straightening wall 60a Notch

Claims (5)

[Scope of utility model registration request] 1. A hot and cold water mixing plug having a water supply port and a hot water supply port separated from each other in a main body, and a water discharge pipe protruding from the main body at a substantially central portion between the water supply port and the hot water supply port, A hot and cold water mixing tap provided with a throttle part for reducing the flow passage cross section inside the water discharge pipe and rectifying the flow toward the water discharge port at the tip. 2. The narrowed portion is formed by a straightening wall that is erected on a bottom wall inside the water discharge pipe, and the straightening wall has a cutout whose central portion is lower than the remaining left and right portions. The hot and cold water mixing stopper according to claim 1. 3. The flow restricting portion is formed by a straightening wall protruding downward from an upper wall inside the water discharge pipe, and the straightening wall has a flow passage cross section whose center portion is larger than left and right portions. The hot and cold water mixing tap according to claim 1, further comprising a convex notch. 4. A hot and cold water mixing tap having a water supply port and a hot water supply port separated from each other in the main body, and a water discharge pipe protruding from the main body in the center between the water supply port and the hot water supply port, A hot and cold water mixing tap having a guide wall for dividing the flow passage cross section into a plurality of parts in the width direction inside the water discharge pipe. 5. A shielding wall for diverting water from the water supply port toward the hot water supply port side is provided inside the main body at a position biased toward the water supply port side. Alternatively, the hot and cold water mixing tap according to item 3.