JPH01320387A - Automatic mixing faucet - Google Patents

Abstract

PURPOSE:To make mixing of hot water and water efficient by providing a guide member at the mixing part of hot water and water and colliding the flow of the hot water with that of a water by a guide face. CONSTITUTION:The center boss part 2a of a mixing valve 2 is linked to the supporting fitting 4 supporting the lower end part of the thermostat 3 of a water mixing faucet. A guide face (g) is composed by expanding the upper end side of this supporting fitting 4 larger than the outer diameter of the center boss part 2a of the mixing valve 2 and the temp. sensing part of the thermostat 3. The flow (w) of a hot water is collided with the flow (y) of a water flowing to the peripheral edge part by the guide member G equipped with this guide face (g).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention enables hot water supplied from a hot water supply facility and water supplied from a tap to be taken out as mixed water C7Nt) at a desired temperature by operating a thermostat. + [Regarding improvements to automatic mixing faucets.

As shown in FIG. 1, the automatic mixing faucet A described above usually has a shoulder inlet pipe 10 connected to a hot water supply pipe of a hot water supply facility and a shoulder inlet pipe 10 connected to the hot water supply piping of a hot water supply facility, on one side of the bottom of a cylindrical valve box l, as shown in FIG. An annular inlet 10a is provided, a water inlet pipe 11 connected to a water supply pipe leading to a water faucet and an annular water inlet 11a connected thereto are provided on the other side, and a mixed water outlet pipe for taking out mixed water is provided on one side of the upper end. 12 and the mixed water outlet 1 leading thereto.
A mixing valve chamber 13 is formed at the bottom inside the valve box l, which communicates with the inlet port 10a and the water inlet 11a, and above the mixing valve chamber 13, a mixing valve chamber 13 is formed at the bottom, and the mixing valve chamber 13 is connected to the mixed water outlet 12a above the mixing valve chamber 13. A chamber 14 is formed in the mixing valve chamber 13, and a hot water valve 20 that controls the flow rate of hot water flowing in from the submergence port 10a and a hot water valve 20 that controls the flow rate of water flowing in from the water inlet 11a. A cylindrical valve-shaped mixing valve 2 with water valves 21 formed at the upper and lower ends of a cylindrical body is provided so as to be movable up and down. The valve seat 22 for the hot water valve formed on the upper surface of the bottom wall and the valve seat 23 for the water valve formed on the lower surface of the ceiling wall of the mixing valve chamber 13 are opposed to each other, and also in the mixing chamber 14.

The temperature sensing part 30 forming the body of the thermostat 3 inserted into the valve box l is arranged, and its bottom side is supported by the support metal fitting 4 which also serves as a connecting metal fitting, and the lower end of the support metal fitting 4 is arranged. The side is inserted into and connected to the center boss portion 2a of the mixing valve 2, and is pushed upward by a return spring 5 provided between the mixing valve 2 and the inner surface of the bottom wall of the mixing valve chamber 13. Then, the protruding end of the actuating rod 32, which protrudes freely in and out from the guide cylinder part 31 formed on the upper end side of the body of the thermostat 3, is screwed into the upper end of the valve box l. A relief spring 60 abuts against an abutment member 61 supported by the adjustment screw 6 in a vertically movable manner, and sets the abutment member 61 to a stronger spring pressure than the return spring 5.
In the downward direction, it is configured to be biased to be pushed down. As a result, when the temperature of the mixed water in the mixing chamber 14 rises, the operating rod 32 begins to extend due to the temperature sensing operation of the temperature sensing section 30, and conversely lowers the body of the thermostat 3. The operation moves the mixing valve 2 downward, and the hot water valve 20
At the same time as the opening of the water valve 21 is narrowed, the opening of the water valve 21 is widened, and as the temperature inside the mixing chamber 14 decreases, the pressure to push out the first actuating rod 32 decreases, causing the return spring 5 to increase. Due to the spring pressure, the body of the thermostat 3 rises while pushing the operating rod 32, moving the mixing valve 2 upward, narrowing the opening of the water valve 21, and at the same time widening the opening of the hot water valve 20. The temperature of the mixed water (hot water) taken out from the mixed water outlet 12a via the mixing chamber 14 is kept constant.

By the way, the automatic mixing faucet A configured in this way has the following features:
The operation of mixing the hot water flowing in from the submergence port 10a and the water flowing in from the water inlet 11a in the mixing chamber 14 is inevitably insufficient, and as a result, the temperature of the thermostat 3 located in the mixing chamber 14 becomes insufficient. Cold water and high-temperature hot water come into contact with the hot part 30 at different locations at the same time, disrupting the temperature sensing operation, and the mixed water taken out from the mixed water outlet 12a,
There is a problem that some parts are cold and some parts are hot and it is inconvenient to handle.

For this reason, in the past, as shown in FIG. A protrusion 7 that protrudes from the circumferential surface of the support fitting 4 toward the four circumferences.
... to create turbulence in the flow of water and hot water flowing into the mixing chamber 14, stirring and mixing the wood and hot water, or by setting up a temperature sensing part of the thermostat 3. Some methods have been used to attach spiral blades to the circumferential surface of 30 to perform stirring and mixing, but none of these methods have been very effective.

The present invention has been made to solve this problem that occurs in conventional means, and it is possible to properly mix the hot water flowing in from the shoulder inlet 10a and the water flowing in from the water inlet 11a. The mixed water in the mixing chamber 14 is
The purpose is to provide a new means for making hot water and water homogeneously mixed.

Therefore, the present invention has been made based on the knowledge obtained through various studies for the above-mentioned purpose. That is, in the conventional means, the outer peripheral surface of the temperature sensing section 30 forming the body of the thermostat 3 and the temperature sensing section of the support fitting 4 supporting the bottom of the temperature sensing section 30, which is the body of the thermostat 3, The outer circumferential surface of the fitting portion 40 that fits into the lower end of the mixing valve 30 and the outer circumferential surface of the center boss portion 2a of the mixing valve 2 that fits into the connecting portion 41 on the lower end side of the support fitting 4 are , as shown in FIG. 3, are formed so as to be substantially aligned on one surface along the axial direction of the valve case 1, so that the hot water valve 20 can be connected from the shoulder inlet 10'a at the bottom of the valve case 1. The flow W of the hot water flowing into the mixing valve chamber 13 through the mixing chamber 14 and rising toward the mixing chamber 14 is directed toward the axis of the inner cavity of the valve case 1, as shown by the double-lined arrow in FIG. The part near the center rises in two trades, and the water flows from the water inlet 11a through the water valve 21 to the mixing valve chamber 13.
The flow of water flowing into the mixing chamber 14 and rising toward the mixing chamber 14
As shown by the thick black line arrow in Figure 3, the flow rises straight through the area near the outer periphery of the inner cavity of the valve box l, and the flow W of hot water and the flow of water y flows into the mixing chamber 14 in parallel layers inside and outside, and this makes the mixing of hot water and water in the mixing chamber 14 insufficient, and As shown by the broken line in Figure 3, it was found that even if a gear tooth-like protrusion 7 was installed, it could not be used as a means to homogeneously mix hot water and water. .

Therefore, the outer diameter of the fitting part 40 of the support fitting 4 is made larger than the outer diameter of the center boss part 2a of the mixing valve 2 and the outer diameter of the temperature sensing part 30 which is the body of the thermostat 3, and the lower surface side thereof is
As shown by the chain line in FIG. 3, a guide member G is formed on the inner wall surface of the valve body 1, and has a guide surface that slopes upward.
A flow W of hot water flows into the mixing valve chamber 13 from the shoulder inlet 10a and ascends through the inner cavity of the mixing valve 2 as indicated by the double-lined arrow.
is brought closer to the outer periphery of the inner cavity of the valve box 1.
This flow W of hot water collides with the flow y of water flowing in from the water inlet 11a, and the hot water and water are mixed efficiently, and the mixed water in the mixing chamber 14 is homogenized. This is based on the results obtained.

For this reason, in the present invention, as a means for achieving the above-mentioned object, a mixing valve chamber is provided in the bottom of the valve box, which communicates with the inlet at the lower part and the water inlet at the upper part. A mixing chamber is provided above it, the lower end of which communicates with the mixing valve chamber, and the upper end of which communicates with the mixed water outlet, and within the mixing valve chamber, a hot water valve is provided at the lower edge of one circumferential wall, and a water valve is provided at the upper edge. A cylindrical mixing valve is disposed, and its center boss is placed on the lower end side of a support fitting that supports the lower end of a thermostat that has a temperature sensing part arranged inside the mixing chamber and is incorporated into the valve box.
! In the automatic mixing faucet, the diameter of the upper end of the support fitting is enlarged to be larger than the outer diameter of the center boss of the mixing valve and the temperature sensing part of the thermostat, and the inlet is opened from the inlet to the bottom side. An automatic mixing faucet characterized by being provided with a guide member having a guide surface that directs the flow of hot water that flows into the mixing valve chamber through the hot water valve and toward the mixing chamber toward the periphery of the valve box. This is something I would like to raise.

Next, embodiments will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the previous means are used for components having the same effect.

FIG. 4 is a longitudinal cross-sectional view of the entire automatic mixing faucet A in which the present invention can be implemented, in which l is a valve box, 2 is a mixing valve, 3 is a thermostat, 4 is a support fitting, 5 is a return spring, Reference numeral 6 indicates an adjustment screw. G indicates a guide member. The valve box 1 is provided with a submergence inlet pipe lO and a water inlet pipe 11 at the bottom of the outer periphery so as to be symmetrical left and right, and a mixed water outlet pipe 12 at the body. It is a normal type with an adjustment screw 6 screwed into the upper part, and inside, there is a "
A mixing valve chamber 13 is formed which communicates with the mixing valve chamber 13 through the inlet port 10a and the water inlet 11a, and the lower end side communicates with the mixing valve chamber 13 in the inner cavity of the body, and a mixed water outlet with respect to the mixed water outlet pipe 12 is formed. A mixing chamber 14 is formed which communicates with the mixing chamber 12a, and the upper end side of the mixing chamber 14 is closed by the aforementioned adjustment screw 6.

The mixing valve 2 has a hot water valve 20 and a water valve 21 formed on the upper and lower edges of a cylindrical wall 2b, respectively.
A hot water valve 20 formed on the lower edge of the cylindrical wall 2b is fitted into the mixing valve chamber 13 at the bottom of the valve box l so as to be slidable up and down with the axial direction as the up and down direction. The water valve 21 formed on the upper edge of the cylindrical wall 2b faces the valve seat 23 for the water valve provided on the ceiling of the mixing valve chamber 13. (Figure 6), and
A support fitting 4 supports the thermostat 3 by fitting the central boss portion 2a of the mixing valve 2 to the lower end of the temperature sensing portion 30 forming the body of the thermostat 3 through a fitting portion 40.
By fitting into the connecting part 41 on the lower end side of the thermostat 3, it is connected so as to move together with the temperature sensing part 30 which is the body of the thermostat 3, and is urged upward by the return spring 5. be.

The thermostat 3 has a temperature-sensitive substance that expands in volume and increases pressure due to temperature rise in the temperature-sensing part 30 forming the body, and the temperature-sensing part 30 increases due to the pressure change accompanying the temperature change.
It is a normal wax thermostat type in which an operating rod 32 fitted into a guide cylinder part 31 that is continuous with the body moves in and out.
is inserted into the valve box 1 with the temperature sensor 30 facing downward and the operating rod 32 facing upward, and with the temperature sensing part 30 located in the mixing chamber 14, and the lower end side is inserted into the mixing valve 2.
It is supported by a support fitting 4 connected to.

An abutting member 61 provided on the adjustment screw 6 that screws the upper end side, which is the protruding end of the operating rod 32, into the open opening on the upper end side of the valve box 1.
It is a tight fit.

The adjustment screw 6 is formed into a cylindrical shape with a bottom, and is screwed into the opening on the upper end side of the valve box l with its open side facing downward. It is supposed to move. The abutment member 61 is fitted into the inner cavity of the adjustment screw 6 so as to be able to slide up and down, and is operated by relief springs 60, 60 which are set to have a spring pressure stronger than the spring pressure of the return spring 5. , and is pushed down to a position where it abuts against the stopper 62 and is held at that position.

As shown in FIG. 6, the above-mentioned support fitting 4 has a portion projecting upward from the center boss portion 2a of the mixing valve 2 that is lower than the outer circumferential surface m of the center boss portion 2a of the valve body. 1
The diameter of the inner cavity is increased so as to protrude greatly toward the peripheral edge of the inner cavity in a brim-like manner, and the lower surface side of the expanded diameter portion is formed into a guide surface g that slopes upward toward the outer peripheral edge. By the way.

The enlarged diameter part of this support fitting 4 is formed into a guide member G,
And, as shown in FIG. 6, the guide surface g of the guide member G is connected from the water inlet 11a to the mixing chamber 1 on the inner surface of the body peripheral wall of the valve box l.
The upper and lower intermediate portions of the guiding surface 2 are formed to be inclined so as to guide the flow of water from the water inlet 11a to the mixing chamber 14 via the water valve 21. It is shaped to guide the flow of hot water towards.

Further, the upper surface side of the protruding end in the radial direction of the guide member G is formed into a guide surface l parallel to the guide surface 2 formed on the inner surface of the trunk circumferential wall of the valve box l, and this guide surface The mixing channel U is configured by the guide surface 2 and the guide surface 2.

The embodiment device constructed in this manner operates as follows.

Assuming that the mixing valve 2 is in the state position shown in FIG.
The hot water supplied to the main population pipe 10 flows into the main population jOa, which is formed in an annular flow path surrounding the bottom of the mixing valve chamber 13, and connects the main population 10a and the mixing valve chamber 13. between the hot water valve 20 formed on the lower edge of the cylindrical wall 2a and the valve seat 22 formed on the soil surface of the bottom wall of the mixing valve chamber 13. The flow W of the hot water flowing into the mixing valve chamber 13 from the gap formed in the center boss of the mixing valve 2 as shown by the double line arrow in FIG. When flowing through the flow path 2c formed between the outer peripheral surface of the cylinder wall 2a and the inner peripheral surface of the cylindrical wall 2b and rising toward the mixing chamber 14, at the point where it flows through the flow path 2c, Guide member G formed by expanding the diameter of the upper end of the support fitting 4
It hits the guide surface g on the lower surface of , and by that guide surface g,
The particles are drawn toward the periphery of the inner cavity of the valve body 1, toward the guiding surface 2 provided near the entrance of the mixing chamber 14.

Further, the water that is fed to the water inlet pipe 11 and flows into the water inlet 11a that annularly surrounds the upper end of the mixing valve chamber 13 separates the communication area between the water inlet 11a and the mixing valve chamber 13. Mixing is carried out through a gap formed between a water valve 21 that is blocked by the cylindrical wall 2b of the mixing valve 2 and formed on the upper edge of the cylindrical wall 2b, and a valve seat 23 that is formed on the ceiling of the mixing valve chamber 13. It flows into the valve chamber 13 and, as shown by the thick arrow in FIG. Mixing room 14 while being brought together
It becomes a flow y toward , and flows into the mixing chamber 14 .

From this, the flow W of hot water, which is directed toward the peripheral edge of the inner cavity of the valve box 1 by the guide surface g on the lower surface of the guide member G and rises into the mixing chamber 14, is directed along the guide surface 2. The water flow y, which is moving towards the center of the inner cavity of the valve box 1 and rising into the mixing chamber 14, collides with the water flow y from below perpendicularly to the collision site. The water is mixed with the water flow y at the water flow y, and while mixing, the center of the inner lumen of the valve body l is The direction is changed so that the hot water flows into the mixing chamber 14, so that hot water and water can be mixed efficiently.

Next, FIG. 7 shows another embodiment. This example is
The upper end of the support fitting 4 is connected to the temperature sensing part 30 of the thermostat 3.
and a guide member G having a diameter larger than the outer diameter of the center boss portion 2a of the mixing valve 2 and having a guide surface g on the lower surface side that directs the flow W of hot water toward the peripheral edge of the inner cavity of the valve box l. The formation of the protrusion 7 is the same as in the previous embodiment, but when the outer end of the guide member G is viewed from above, there are protrusions 7 shaped like gear teeth.
This is different from the previous embodiment in that it is formed as follows. That is, the guide member G, which is formed by expanding the diameter of the upper end of the support fitting 4, is divided into two in the direction of diameter expansion, and the inner end has a guide surface g that is continuous in the circumferential direction on the lower surface side. The outer end side has a notch 7a that is vertically transparent.
A large number of notches 7a are provided at appropriate intervals in the circumferential direction, and the spaces between the notches 7a form protrusions 7 that protrude like the teeth of a gear, and are arranged in an annular manner in the circumferential direction. The flow W of hot water, which is drawn toward the peripheral edge of the valve box l by the guide surface g, is made such that a part of it escapes upward through the notches 7a.

Note that the rest of the configuration is the same as that of the embodiment described above, so the same constituent members are given the same reference numerals and detailed explanations will be omitted.

This embodiment operates in the same manner as the previous embodiment, and the flow W of hot water collides with the flow y of water flowing in from the water inlet 11a through the gap between the water valve 21 and the valve seat 23. When the water is heated, the hot water guided by the inner end portion of the guide surface g of the guide member G and the outer end portion of the guide surface g that is only on the lower surface side of the protrusion 7... The flow and the flow of hot water guided by the inner end portion of the guide surface g and directed upward through the rear notch 7a collide in two stages, so that the intestines and the water collide. Make mixing efficient.

Next, FIG. 8 shows a further different embodiment. In this embodiment, a guide member G formed by expanding the diameter of the upper end of the support fitting 4 has a uniform guide surface G formed on the lower surface thereof. This is an example where the state is not continuous, but changes in the middle. That is, in the guide member G formed by expanding the diameter of the upper end of the support fitting 4, on the inner end thereof, the lower guide surface g1 is an inclined surface that rises in the direction of diameter expansion. , on the outer end side, the guide surface g2 on the lower surface side is formed in a plane along a substantially horizontal direction, and on the outer end side of the cone-shaped enlarged diameter part, which has a lower tapered surface as a whole, The guide member G is formed in a continuous shape with a flange portion having a flat lower surface.

The rest of the configuration of this embodiment is the same as that of the previous embodiment, so the same components are given the same reference numerals and detailed explanations will be omitted.

Therefore, in this embodiment, the flow W of hot water flowing from the mixing inlet 10a into the mixing valve chamber 13 through the gap between the hot water valve 20 and the valve seat 22 and toward the mixing chamber 14 is directed to the upper end of the support fitting 4. With the guide surface g of the guide member G formed on the side, the water flows into the mixing chamber 14 from the water inlet 11a through the gap between the water valve 21 and the valve seat 23, near the peripheral edge of the inner cavity of the valve box 1. When colliding with the water flow y directed toward , the two guide surfaces g1φg2 cause the collision to occur in two stages.
By 7I! Since the flow W collides with the water flow y in a direction opposite to that of the flow y, the mixing of hot water and water becomes more efficient.

As explained above, the automatic mixing faucet according to the present invention is provided with a mixing valve chamber 13 in the bottom of the valve box 1, which communicates with the mixing inlet 10a at the lower part and the water inlet 11a at the upper part, is provided with a mixing chamber 14 whose lower end communicates with the mixing valve chamber 13 and whose upper end communicates with the mixed water outlet 12a, and within the mixing valve chamber 13, a hot water valve 20 is provided at the lower edge of the peripheral wall 2b, and a water valve is provided at the upper edge. A cylindrical mixing valve 2 provided with 21 is disposed,
The center boss part 2a of the temperature sensing part 3 is inserted into the mixing chamber 14.
In the automatic mixing faucet, the upper end of the support fitting 4 is connected to the lower end side of the support fitting 4 which supports the lower end of the thermostat 3 installed in the valve box l by arranging the upper end side of the mixing valve 2. The outer diameter of the central boss portion 2a and the aforementioned thermostat 3
The diameter is expanded to be larger than the outer diameter of the temperature sensing part 30 of the valve box 1, and the flow W of hot water flowing into the mixing valve chamber 13 from the mixing inlet 10a through the hot water valve 20 to the mixing chamber 14 on the lower surface side is directed to the valve box 1. It is configured by forming a guide member G having a guide surface g that moves toward the inner peripheral edge, and the water flows from the mixing inlet 10a through the hot water valve 21 into the mixing valve chamber 13 and toward the mixing chamber 14. The flow of hot water W,
It is brought to the periphery side of the inner cavity of the valve box l, and collides with and merges with the flow y of water flowing from the water inlet 11a into the mixing valve chamber 13 and toward the mixing chamber 14 from a direction that intersects with the water flow y, which prevents contamination. The hot water flowing from the port 10a through the hot water valve 20 and the water flowing from the water inlet 11a through the water valve 21 are efficiently and accurately mixed, and the mixing chamber 14 It becomes possible to homogenize the mixed water within the tank.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional front view of the automatic mixing faucet, Figure 2 is a cross-sectional plan view of the main parts of the same, and Figure 3 is an enlarged vertical sectional front view of the main parts of the same.
FIG. 4 is a longitudinal sectional front view of the automatic mixing faucet according to the present invention;
The figure is a plan view of the same example, FIG. 6 is an enlarged longitudinal sectional front view of the main part of the same example, and FIG. 7 is an enlarged longitudinal sectional front view of the main part of another embodiment.
FIG. 8 is an enlarged longitudinal sectional front view of the main parts of a further different embodiment. Explanation of drawing symbols A...Automatic mixing faucet G...Guiding member g"
g'・gt ・g2...Guide surface 2...Guidance surface W...Flow of hot water y...Flow of water U.
...Mixing waterway m...Outer surface 1...Valve box 1
0... Infiltration pipe 10a... Required population 11.
...Water inlet pipe 11a...Water inlet 12...
Mixed water outlet pipe 12a...Mixed water outlet 13...
Mixing valve chamber 14...Mixing chamber 14a...Inlet part 2...Mixing valve 2a...Center boss part
2b...Cylinder wall 2C...Flow path 20...Hot water valve 21...Water valve 22...Valve seat for hot water valve
23... Valve seat for water valve 3... Thermostat
30... Temperature sensing part 31... Guide cylinder part 32.
・・Operating rod 4・・Supporting metal fittings 40・・
- Fitting part 41... Connection part 5... Return spring 6... Adjustment screw 60... Relief spring 6
1... Matching member 62... Stopper 7.
...Protrusion 7a...Notch Applicant NTC Corporation Figure 3 Figure 2 Figure 2C Figure 1 Figure 5 Figure 4 Figure 6 Figure 7

Claims (3)

[Claims] (1) A mixing valve chamber 13 is provided at the bottom of the valve box 1, which communicates with the hot water inlet 10a at the lower part and the water inlet 11a at the upper part. Mixing chamber 1 whose communicating upper part communicates with the mixed water outlet 12a
4, and a cylindrical mixing valve 2 having a hot water valve 20 on the lower edge of the peripheral wall 2b and a water valve 21 on the upper edge is disposed in the mixing valve chamber 13, and the central boss portion 2a of the mixing valve 2 is disposed in the mixing valve chamber 13. , the mixing chamber 14
In an automatic mixing faucet that is connected to the lower end side of a support fitting 4 that supports the lower end of a thermostat 3 that is incorporated into a valve box 1 and has a temperature sensing part 30 disposed therein, the upper end side of the support fitting 4 is , the outer diameter of the center boss portion 2a of the mixing valve 2 and the outer diameter of the temperature sensing portion 30 of the thermostat 3 are enlarged to a larger extent than the outer diameter of the central boss portion 2a of the mixing valve 2, and the inside of the mixing valve chamber 13 is expanded from the hot water inlet 10a through the hot water valve 20 to the lower surface side. An automatic mixing faucet characterized in that a guide member G is provided with a guide surface g that directs the flow w of hot water flowing into the valve box 1 toward the periphery of the valve box 1. (2) The automatic mixing faucet according to claim 1, wherein the guide member G is provided with a protrusion 7 shaped like a gear tooth in plan view on the outer end side. (3) The guide member G has a guide surface g whose inner end side is the lower surface side.
A cone-shaped guide surface g whose outer end is the lower surface.
The automatic mixing faucet according to claim 1, wherein the automatic mixing faucet is formed into a flat brim shape.