JPH11218241A - Hot water/cool water mixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out a sufficient mixing and to prevent the generation of a temperature unevenness, by making the hot water and the cool water flow to the center part of a valve disc case, and imparting a rotation to the flow of the hot water and the cool water, even when the feeding pressure of the hot water and the cool water is low. SOLUTION: In this hot water/cool water mixing device, the flowing-in ports 3 and 4 of the hot water and the cool water are formed on the peripheral surface of a valve disc case 1, and the flowing-in amounts of the hot water and the cool water are controlled by controlling the opening areas of both flowing-in ports by a spool valve disk 5 provided slidable to the inner hole 2 in the valve disc case 1, so as to obtain a warm water at a desired temperature. The flow passage between the flowing-in ports 3 and 4 of the hot water and the cool water is divided into plural parts in the peripheral direction, to make the fluid flowed in from the flowing-in ports reach in the central direction within the divided sections, so as to make the hot water and the cool water mixed and churned sufficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve body case in which hot and cold water inlets are formed on a peripheral surface of the valve body case, and the opening areas of both the inlets are axially slidably arranged in a bore in the valve body case. The present invention relates to a hot and cold water mixing apparatus that controls the flow rate of hot water and water by controlling the provided spool valve body to obtain hot water at a desired temperature.

[0002]

2. Description of the Related Art A hot water mixing apparatus of this type is, for example, incorporated as a cartridge in the main body of a hot water mixing faucet, and is usually constructed as shown in FIG. An inner cavity 2 for forming a flow path is provided through the center of the valve case 1, and hot water and water inlets 3 and 4 are formed on the peripheral surface of the valve case 1. Then, at the positions of the inlets 3 and 4 of the hot water and the water, these inlets 3 and 4
A spool valve element 5 for controlling the ratio of the opening area of the nozzles and determining the amount of hot water and water flowing in is provided slidably in the axial direction. The spool valve element 5 has a hot-side valve element 5a and a water-side valve element 5b integrally connected, and a temperature-sensitive spring 6 made of a shape memory alloy.
And are biased in opposite directions by the bias spring 7 and are balanced. One end of the bias spring 7 is locked by the plug 8, and by changing the axial position of the plug 8, the biasing force of both springs 6 and 7 is changed, and the balance position of the spool valve 5 is adjusted. Change the inflow ratio of hot water,
The temperature of the resulting hot water is changed.

For example, if the supply pressure on the hot water side or the water side changes from a state in which the spool valve element 5 is balanced at a certain set position, and the inflow ratio of hot water and water for the same opening area changes, The temperature of the hot water obtained by mixing changes, and the temperature-sensitive spring 6 detects this and reacts. That is, the temperature-sensitive spring 6 changes its urging force in accordance with the temperature of the hot water obtained by mixing, moves the spool valve element 5 in a direction to correct the temperature change, and has an automatic temperature control function. I have.

[0004]

However, in the above-mentioned conventional hot water mixing apparatus, the hot water and water inlets of the hot and cold water mixing faucet main body are connected to the hot water and water inlets 3 and 4 of the valve case 1. The supplied hot water and the water are supplied by the same force of the flow coming through the inlet of the faucet main body, so that the annular ports 3a and 4a
, And as shown in FIG. 7 (A), unevenness occurs in the circumferential direction in the momentum and hot water flowing into the valve body case 1. Also, as shown in FIG.
Hot water and water flowing into the lumen 2 of the valve body case 1 form a large flow in the circumferential direction, but do not reach the center direction,
There has been a disadvantage that mixing of hot water and water is not performed sufficiently. Furthermore, when the supply pressure of hot water and water is low, the amount of hot water and water flowing in is small, the momentum of the flow itself is insufficient, and there is a problem that the mixing of hot water and water is further deteriorated.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems and has been improved and removed. Even when the supply pressure of hot water and water is low, the present invention is not limited to the present invention. It is an object of the present invention to provide a hot and cold water mixing apparatus that allows hot and cold water to flow, and imparts rotation to the flow of the hot and cold water to perform sufficient mixing and prevent the occurrence of temperature unevenness.

According to the first aspect of the present invention, there is provided a valve body case in which a hot water inlet and a cold water inlet are formed on a peripheral surface of a valve body case, and an opening area of both the inlets is reduced. By controlling with a spool valve element slidably disposed in the bore inside the valve element case in the axial direction, the inflow amount of hot water and water is controlled,
In a hot and cold water mixing device that obtains hot water of a desired temperature, detects a change in the temperature of the mixed water with a temperature-sensitive member, changes the urging force of the spool valve body, and automatically adjusts the temperature, The flow path between the hot water and the water inlet is divided into a plurality in the circumferential direction so that the fluid flowing in from each inlet reaches the center direction in the divided section even at a small flow rate, And a water mixing device wherein the water and the water are sufficiently mixed and stirred. By dividing the flow path between the hot water and the water inlet in the valve body case into a plurality in the circumferential direction, the hot water and the water flowing into each of the divided sections have a small flow rate. The water starts to rotate in the compartment, and the hot water and the water flow to the center by this rotation, thereby promoting the mixing. That is, it is possible to prevent temperature unevenness.

The means of claim 2 adopted by the present invention is as follows.
The convex portion along the axial direction is provided near the center of the flow path of each divided section, and a fluid passing through the convex section generates a circumferential rotational force in each section. It is a hot water mixing device. By the convex portion, the hot water and water flowing into each section can be dispersed and penetrated to the center,
After that, since the hot water and the water are mixed and stirred, sufficient mixing and stirring can be performed, and there is no occurrence of temperature unevenness.

Further, according to the third aspect of the present invention, the convex portion is formed from the upstream inlet to an intermediate position between the upstream inlet and the downstream inlet. 2
The hot and cold water mixing apparatus described in 1. above. Fluid flowing from the upstream inlet is dispersed at the convex portion along the axial direction, and the fluid flowing from the downstream inlet is sandwiched between the dispersed fluids, thereby mixing the hot water and the water. I try to promote it.

Further, according to a fourth aspect of the present invention, the convex portion has a plurality of surfaces in the axial direction, and the length of each surface in the axial direction is changed so that the fluid passing through each surface is changed. 4. The hot and cold water mixing apparatus according to claim 2, wherein a circumferential rotational force is generated in each section. In this case, the fluid that has flowed in can be dispersed by the surfaces of the protrusions along the axial direction, and a rotational force can be applied thereon, thereby obtaining extremely excellent mixing.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the embodiments of the invention shown in the drawings. The same reference numerals as those in the conventional case denote the same members. FIGS. 1 to 3 relate to a first embodiment of the present invention. FIG. 1 is a longitudinal sectional side view of a valve body case 1, and FIG. 2 is a perspective view showing a spool valve body 5 and a flow path dividing member 9. FIGS. 3A and 3B are schematic views corresponding to a vertical sectional view of the spool valve element 5 for explaining the flow of the flowing fluid and viewed from the front. As shown in the figure, in this embodiment, the valve case 1
Two inlets 3 and 4 for hot water and water are formed on the peripheral surface of the, the upstream inlet 4 serves as a water inlet, and the downstream inlet 3 serves as a hot water inlet. Then, a cross-shaped flow path dividing member 9 is fitted inside the lumen 2 of the valve body case 1 between the water inlet 4 and the hot water inlet 3, and the hot water inlets 3 and 4 are provided.
Is divided into four in the circumferential direction. The chamber in which the temperature-sensitive spring 6, which is a chamber in which hot water and water are mixed, is not partitioned by the flow path dividing member 9, but communicates with each other, so that mixing of hot and cold water is smooth. Is being done.

As described above, the flow path (lumen 2) between the inflow ports 3 and 4 in the valve body case 1 is divided into four parts in the circumferential direction, so that hot water and water respectively flow as indicated by arrows in FIG. Then, the water flows while rotating in each section, and the mixing of hot water and water is promoted. That is, it is possible to prevent the occurrence of temperature unevenness.

FIG. 4 shows a second embodiment of the present invention. FIG. 4A is a perspective view of a flow path dividing member 9 provided with a convex portion 10 along the axial direction, and FIG. ) Is the front view. In the second embodiment, when the supply pressure is low, the strength of the hot water and the water flowing from the inlets 3 and 4 of the hot water and the water is weak, and the hot water and the water cannot enter the central portion. Even so, sufficient mixing and stirring of hot water and water can be obtained. Specifically, an axially extending convex portion 10 having two axially extending surfaces is formed at an inner corner near the center of the flow path dividing member 9. The projection 10 along the axial direction is provided from the position of the water inlet 4 on the upstream side to the middle of the hot water inlet 3 on the downstream side, and the position of the water inlet 3 on the downstream side. Is not provided.

By forming the convex portion 10 along the axial direction in the flow channel dividing member 9 as described above, the water flowing from the upstream inlet 4 flows along the ridge line of the convex portion 10 along the axial direction. Are distributed. Then, the region where the flow of the water is strong is along both surfaces of the convex portion 10 along the axial direction, as shown by the oblique lines in FIG. 4B. On the other hand, the hot water flowing in from the downstream inlet 3 enters the middle of the regions where the dispersed water has a momentum, and can sufficiently flow to the center even with a weak supply pressure. Therefore, on the downstream side from the flow path dividing member 9, the hot water and the water flowing to the center position are sufficiently mixed and stirred, and there is no occurrence of temperature unevenness. The other configuration and operation and effect are the same as those of the first embodiment.

FIG. 5 relates to a third embodiment of the present invention, and FIG. 5A is a perspective view showing a flow path dividing member 9,
FIG. (B) is a front view thereof. As shown in the figure, in this embodiment, the length of one surface of the protrusion 10 along the axial direction is a, the length of the other surface is b, and a <a.
b. By doing so, the direction of the water flowing on the surface a and the direction of the water flowing on the surface b are shifted on the end surface side, and the water flowing on the surface a is penetrated inward, and Gives flow a rotation in the direction of the arrow.
This rotation also draws in hot water flowing from the inflow port 3 on the downstream side, so that even if the supply pressure is weak, the hot water can sufficiently enter the center and be mixed and stirred. That is, the occurrence of temperature unevenness is prevented. The other configuration and operation and effect are the same as those of the first embodiment.

Incidentally, the present invention is not limited to the above-described embodiment, and can be appropriately changed. For example, the number of divisions of the flow path dividing member 9 can be plural other than four. In addition, the convex portion 10 along the axial direction may have two or more surfaces, may be formed in a step shape, and may have a semicircular cross section. Even with such a convex part, it is possible to apply a rotational force to the inflowing water. Furthermore, the spool valve element 5
May be one in which the hot water side valve element and the water side valve element are separated, and these separated valve elements are separated from each other by the flow path dividing member 9.
May be connected.

[0016]

As described above, in the present invention,
The flow path between the hot water and the water inlet in the valve body case is divided into a plurality in the circumferential direction, and even when the flow rate is small, the fluid flowing in from each of the inlets is directed toward the center in the divided section. So that the hot water and the water were mixed and stirred well,
It is possible to prevent the occurrence of temperature unevenness.

Further, in the present invention, an axially convex portion having a plurality of surfaces is provided near the center of the flow path of each of the divided sections, and a fluid passing through each of the divided sections is provided with a circumferential direction in each of the sections. Since the rotating force is generated, the convex portion allows the hot water and water flowing into each section to be dispersed and allowed to enter the center, and thereafter the hot water and the water are sufficiently removed on the downstream side. Mixing and stirring can be performed, and occurrence of temperature unevenness can be prevented.

Further, in the present invention, the convex portion along the axial direction is formed from the upstream inlet to an intermediate position between the upstream inlet and the downstream inlet. for that reason,
The fluid flowing from the upstream inlet is dispersed by the convex portion, and the fluid flowing from the downstream inlet is sandwiched between the dispersed fluids so as to promote mixing of hot water and water. The occurrence of temperature unevenness is prevented.

Furthermore, in the present invention, the axial length of each surface of the convex portion along the axial direction is changed, and a fluid passing through each surface generates a rotational force in the circumferential direction in each section. Because it is made to disperse the fluid flowing in each surface of the convex portion, it is possible to apply a rotating force on it, and it is possible to obtain extremely excellent mixing of hot water and water, and to reduce the occurrence of temperature unevenness. It is possible to prevent.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a hot and cold water mixing apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a spool valve element and a flow path dividing member of the hot and cold water mixing apparatus according to the first embodiment of the present invention.

FIG. 3 is a vertical sectional front view of the spool valve element according to the first embodiment of the present invention.

FIG. 4 relates to a second embodiment of the present invention,
FIG. 1A is a perspective view showing a flow path dividing member, and FIG. 1B is a front view thereof.

FIG. 5 relates to a third embodiment of the present invention,
FIG. 1A is a perspective view showing a flow path dividing member, and FIG. 1B is a front view thereof.

FIG. 6 is a longitudinal sectional side view showing a conventional hot and cold water mixing apparatus.

FIG. 7 shows a conventional hot and cold water mixing apparatus, and FIGS. (A) and (B) are longitudinal sectional front views showing flows of hot water and water, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Valve case 2 ... Lumen 3 ... Hot water inflow 4 ... Water inflow 5 ... Spool valve 6 ... Temperature sensitive spring 7 ... Bias spring 9 ... Flow path dividing member 10 ... Protrusion along the axial direction

Claims (4)

[Claims] 1. A spool valve body in which hot water and water inflow ports are formed on the peripheral surface of a valve body case, and the opening areas of both the inlet ports are slidably disposed in a bore in the valve body case in the axial direction. By controlling the inflow of hot water and water, the hot water of the desired temperature is obtained, the temperature change of the mixed water is detected by the temperature sensing member, and the urging force of the spool valve body is changed, thereby controlling the automatic temperature. In the hot and cold water mixing device that is adjusted, the flow path between the hot water and the water inlet in the valve body case is divided into a plurality in the circumferential direction, and even when the flow rate is small, the fluid flowing in from each of the inlets Wherein the hot water and the hot water are mixed and stirred sufficiently so as to reach the center in the divided section. 2. A method according to claim 1, wherein each of the divided sections is provided with a convex portion along the axial direction near the center of the flow path, and a fluid passing through the convex section generates a rotational force in a circumferential direction in each section. Item 6. A hot water mixing device according to Item 1. 3. The hot and cold water mixing apparatus according to claim 2, wherein the convex portion is formed from the upstream inlet to a position intermediate between the upstream inlet and the downstream inlet. 4. The projection has a plurality of surfaces in the axial direction, and by changing the length of each surface in the axial direction, a fluid passing through each surface generates a rotational force in a circumferential direction in each section. 4. The hot and cold water mixing apparatus according to claim 2, wherein