JP2551086Y2 - Hot water mixer tap - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of mixing high-temperature water (hot water) supplied from a hot water supply source and low-temperature water (water) supplied from a water supply source, and discharging hot water having a desired temperature from a discharge port. The invention relates to a hot and cold water mixing tap.

[0002]

2. Description of the Related Art Kitchens, bathrooms, washrooms, etc., at a temperature of 30.degree.
In a place where hot water of about ° C. is used, hot water and water are supplied at the same time, and a hot-water mixer tap which mixes an appropriate amount of the hot water and discharges hot water at an appropriate temperature is used.

Heretofore, various types of hot-water mixing taps of this type have been known, and typical ones include a thermostat mixing valve, a single-lever type, and the like.

The former has a thermostat (thermosensor) provided in a mixing water channel, and automatically controls a mixing ratio of hot water and water by using the thermostat to maintain a temperature of the mixed hot water at a set temperature. It has a temperature control section and an opening / closing section which is provided separately from the valve body and starts and stops the discharge of hot water and adjusts the flow rate. In the latter, the automatic temperature control section and the opening / closing section are integrally formed so that the operations of these sections can be respectively operated by rotating and tilting one handle lever.

Here, the one using the thermostat mixing valve has a problem in operability and the like, and the single lever type has a problem in discharge temperature stability and the like. For this reason, the applicant has superior operability as compared with the one using the conventional thermostatic mixing valve, and has excellent discharge temperature stability as compared with the single lever type,
That is, as shown in FIG. 10, a device having both operability and stability of the discharge temperature was developed.

In FIG. 1, a hot-water mixing tap 10 has a water inflow passage 12 connected to a water supply source 11, a hot water inflow passage 14 connected to a hot water supply source 13, and mixed hot water with hot water. Mixing chamber 15, water inflow path 12 and hot water inflow path 1
An automatic temperature control unit 16 disposed between the mixing chamber 15 and the mixing chamber 15 for automatically adjusting the flow ratio of water and hot water flowing into the mixing chamber 15 in accordance with a set temperature, and communicates with the mixing chamber 15. A mixed water flow path 17, a water bypass flow path 18 a and a hot water bypass flow path 18 b extending from the middle of the water inflow path 12 and the hot water inflow path 14 and bypassing the automatic temperature control unit 16;
The bypass passages 18a and 18b and the mixed water passage 1
An opening / closing / flow rate adjusting unit 19 for opening / closing and controlling the flow rate from the unit 7 and a discharge port 20 provided at a downstream position of the opening / closing / flow rate adjusting unit 19.

The automatic temperature control unit 16 has a set temperature control unit 2 for freely adjusting the set temperature here.
1 is provided.

As a result, the mixing ratio of water and hot water is automatically adjusted by the automatic temperature control section 16, mixed hot water of a predetermined temperature (suitable temperature) is generated in the mixing chamber 15, and the water bypass flow is controlled by the opening / closing / flow rate control section 19. By adding an appropriate flow rate of water or hot water to the mixed hot water via the passage 18a or the hot water bypass flow path 18b, the hot water having a temperature lower or higher than the set temperature (suitable temperature) set by the automatic temperature controller 16 is set. Can be easily obtained and can be discharged from the discharge port 20.

Here, the backflow to the water supply source 11 due to the pressure difference of the water flowing from the water supply source 11 side into the water bypass flow path 18a or the mixed flowing water flowing from the opening / closing / flow rate control unit 19 side, and the hot water bypass flow Backflow to the hot water supply source 13 due to hot water flowing from the hot water supply source 13 side into the path 18b or the pressure difference of the mixed hot water flowing from the opening / closing / temperature control unit 19 side, and further, flowed into the automatic temperature control unit 16 In order to prevent the backflow of water, hot water and mixed hot water, respectively, a position sandwiching the branch point of the water bypass passage 18a of the water inflow path 12 and a position sandwiching the branch point of the hot water bypass path 18b of the hot water inflow path 14, respectively. 4 in total
It was necessary to interpose the two check valves 22a to 22d.

[0010]

However, as described above, two each of the water inflow channel and the hot water inflow channel (4 in total) are provided.
Is provided, the check valve has a water flow resistance, so that the flow rates of water and hot water flowing into the automatic temperature control unit through the two check valves are reduced, and sufficient check As a result, the amount of hot water discharged from the discharge port becomes small, which makes it difficult to use, and also causes a problem that maintenance becomes considerably troublesome. It turned out to be.

SUMMARY OF THE INVENTION In view of the above, the present invention provides a check valve having a water flow resistance while reliably preventing water or hot water once flowing out of a water supply source and a hot water supply source from flowing back to the water supply source and the hot water supply source again. By reducing the number as much as possible, it is possible to ensure that a sufficient flow of water and hot water flows into the automatic temperature control unit, and to provide an easy maintenance unit.

[0012]

In order to achieve the above object, a hot and cold water mixing tap according to the present invention comprises a water inflow passage connected to a water supply source, a hot water inflow passage connected to a hot water supply source, and a water and hot water supply passage. Is provided between the mixing chamber and the mixing chamber where the mixed hot water is generated, and the water inflow path and the hot water inflow path are disposed between the mixing chamber and the flow rate ratio of the water and the hot water flowing into the mixing chamber according to the set temperature. An automatic temperature control unit for automatically adjusting, a mixed water flow path communicated with the mixing chamber, a water bypass path connecting a water inflow path and a mixed water flow path by bypassing the automatic temperature control unit, and a hot water inflow path. A bypass flow path including a hot water bypass path that connects the mixed water flow path to the automatic temperature control unit by bypassing the automatic temperature control unit; and a bypass flow path that is provided at a downstream end position of the bypass flow path and flows out of the bypass flow path to the mixed water flow path. Control the flow of hot or cold water and the flow of mixed hot water A closed flow rate adjusting section, and a connection section with a water inflow path toward the automatic temperature control section and a connection section with a water bypass flow path, which are disposed at a branch point from the water inflow path of the water bypass flow path, respectively. A connection portion between a water-side check valve provided with a backflow preventing means, a hot water inflow passage provided at a branch point from the hot water inflow passage of the hot water bypass passage toward the automatic temperature control section, and a hot water bypass; And a hot-water-side check valve provided with a backflow prevention means at a connection portion with the flow path.

[0013]

According to the present invention constructed as described above, the water supplied from the water supply source and the hot water supplied from the hot water supply source flow into the automatic temperature control section through each one check valve. By ensuring this sufficient flow rate and preventing the backflow of water, hot water and mixed hot water from the bypass flow passage and the automatic temperature control unit with one check valve installed in the water and hot water inflow passage, Maintenance can be facilitated.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, at a branch point of a water bypass passage 18a in the middle of a water inflow passage 12 connected to a water supply source 11, water supplied from the water supply source 11 is branched into two flow passages, and A water-side check valve (double check valve) 23a for preventing backflow in each flow path is interposed, and is provided at a branch point of a hot-water bypass flow path 18b in the middle of the hot-water inflow path 14 connected to the hot-water supply source 13. Also, a hot-water-side check valve (double check valve) 23b for splitting hot water supplied from the hot-water supply source 12 into two flow paths and preventing backflow in each flow path is interposed.

That is, the water supplied from the water supply source 11 is branched into two flow paths, that is, a water bypass flow path 18a in addition to the water inflow path 12 by passing through the water side check valve 23a. 13 is supplied to the hot-water check valve 23b.
Through the flow path, two hot water inflow paths 1
In addition to 4, it is branched to a hot water bypass passage 18 b.

FIG. 2 shows details of the check valve 23a (23b).
Shown in Although FIG. 2 shows the water-side check valve 23 a provided in the water inflow path 12, the configuration of the hot-side check valve 23 b provided in the water inflow path 14 is the same.

That is, on the peripheral wall of the water-side check valve 23a,
The water (hot water check valve 2) supplied from the water supply source 11
3b, a plurality of inlets 24 for receiving hot water supplied from the hot water supply source 13 are provided, and two flow paths 25a, 25a extending vertically with the inlet 24 interposed therebetween.
25b are formed.

The one flow path 25a is connected from the water inflow path 12 to the automatic temperature control section 16 (similarly, in the hot water check valve 23b, from the hot water inflow path 14 to the automatic temperature control section 16). The other flow path 25b is connected to the water bypass flow path 18a (similarly, in the hot water side check valve 23b, the hot water bypass flow path 18b). In other words, water supply source 1
1 supplied into the water inflow path 12 from the inflow port 24 flows into the inside of the water-side check valve 23a.
After flowing along the water bypass passage 18a and flowing inside the water bypass passage 18a, the water flowing along the other flow passage 25a flows from the water inflow passage 12 through the automatic temperature control unit 1
It is made to reach within 6.

The water flowing along each of the flow paths 25a and 25b and flowing out (similarly, hot water in the case of the hot water side check valve 23b) and the mixed hot water from the opening / closing / flow rate adjusting section 19 flow backward. That is, the check valves 23a, 23
In order to prevent the water that has exited from b and the mixed hot water from the opening / closing / flow rate adjusting unit 19 from returning to the water-side check valve 23a, a backflow prevention mechanism is provided in each of the flow paths 25a and 25b. Is provided.

That is, the check valve 23a (23b) is provided with two valve seats 26a and 26b, and two valve bodies 27 abutting on one of the valve seats 26a and 26b.
a and 27b are stored. And one valve body 27
a is urged by a coil spring 28 in a direction in which it comes into contact with the valve seat 26a, and when the internal pressure becomes higher than the elastic force of the coil spring 28, the valve body 27a is lifted from the valve seat 26a, and , 27a, water (similarly, in the case of the hot water side check valve 23b) is discharged to the outside, that is, from the water flow passage 12 (similarly, the hot water passage 14 in the case of the hot water side check valve 23b). It flows toward the automatic temperature controller 16. Similarly, the other valve body 27b is urged by the coil spring 29 in a direction in which it comes into contact with the valve seat 26b. When the internal pressure becomes higher than the elastic force of the coil spring 29, the valve body 27b is moved from the valve seat 26b. Float the two 26b, 2
Water (similarly, in the hot water side check valve 23b) flows through the space of 7b, and flows from the outlet 30 to the outside, that is, the water bypass passage 18a (also in the hot water side check valve 23b. Flows into the hot water bypass passage 18b).

The pressure of the water, hot water and the mixed hot water that has once flowed out is determined by the water-side check valve 23a and the hot-water check valve 23.
Since each of the valve bodies 27a and 27b of FIG. 2b acts to press the valve bodies 27a and 27b toward the valve seats 26a and 26b, backflow of water, hot water and mixed water can be prevented.

FIGS. 3 and 4 are a vertical sectional front view and a side sectional view of the hot-water mixing tap 10. As shown in FIGS.

In the figure, reference numeral 31 denotes a main body of a faucet.
An automatic temperature controller 16 and an opening / closing / flow rate controller 19 are provided inside the main body 31.

The main body 31 incorporates a water inflow path 12, a hot water inflow path 14 and a discharge flow path 36. The cold water flowing in the water inflow path 12 and the hot water flowing in the hot water inflow path 14 are automatically heated. It is configured to flow through the discharge flow path 36 from the adjustment section 16 sequentially through the opening / closing and flow path adjustment section 19.

In the main body 31, the hot water directly connected to the discharge flow path 36 via the opening / closing and flow rate control section 19 without passing through the water inflow path 12, the hot water inflow path 14 and the automatic temperature control section 16 is provided. A bypass passage 18b and a water bypass passage 18a are provided therein.

The automatic temperature control section 16 has temperature control valve seats 39 and 41 for hot water and water, respectively, formed opposite to the main body 31. A hot water control valve 42a corresponding to the hot water temperature control valve seat 39 and a water control valve 42b corresponding to the water temperature control valve seat 41 are provided between the valve seats 39 and 41 on the one hand. The temperature control valve element 42 is arranged so that the operation in the direction to open one valve (for example, the hot water control valve 42a) is the operation in the direction to close the other valve (same as the water control valve 42b). Have been.

Behind the temperature control valve body 42, a mixed hot water flow path 17 communicating with the opening / closing / flow rate control unit 19 is formed. A thermosensor (thermostat) 44 is provided which moves back and forth from the set position by the thermal expansion and contraction of the wax contained therein to move the temperature control valve body 42 from the set position. Then, by connecting to the temperature sensor 44, the temperature sensor 44 is moved forward and backward by rotating the spindle 45 to set this position, thereby setting the position of the temperature control valve body 42. Provided.

In the present embodiment, the automatic temperature control section 16 is provided in a direction orthogonal to the axis of the main body 31.
One end of the spindle 45 projects from the side surface of the main body 31, and a temperature adjusting handle 47 is attached to the one end.

The opening / closing / flow rate adjusting section 19 is mainly composed of a disk-shaped fixed valve element 48 fixed to the main body 31 and a movable valve element 49 superposed on the fixed valve element 48 in a watertight and slidable manner. Have been. As shown in FIGS. 5 to 9, the fixed valve element 48 penetrates the mixed hot water flow path 1 through the thickness direction.
7. A total of three inflow holes 51, 52, 53 communicating with the hot water bypass channel 18b and the water bypass channel 18a, respectively, are provided. Each of these inflow holes 51, 52, 53
On the fixed valve element 48, they are formed on the circumference of the same circle drawn concentrically with the fixed valve body 48 and separated from each other in an arc shape along the circumference.

The movable valve element 49 has a smaller diameter than the fixed valve element 48. However, when the movable valve element 49 is superimposed on the fixed valve element 48, it does not protrude from the fixed valve element 48 at any position. The three inflow holes 51, 5 provided in the
2, 53
8 are superimposed so that both linear movement and circular movement in all directions are possible.

The movable valve element 49 is provided with an outflow portion 54 formed on the lower surface thereof, that is, the sliding contact surface with the fixed valve element 48 so as to cut off a part of the peripheral portion and communicate with the discharge flow path 36. I have. The outflow portion 54 has an arc shape substantially the same as or slightly larger than the three inflow holes 51, 52, 53 provided in the fixed valve body 48.

A lever handle 56 provided on the upper portion of the main body 31 is connected to the back surface of the movable valve body 49 via an operation force transmitting portion 55. This lever handle 56
The lever 56a is provided to extend to the front side of the main body 31.

In FIG. 4, water is interposed in a water inflow path 12 connected to a water supply source 11 so that water along one flow path flows from the water inflow path 12 to the automatic temperature controller 16 and the other. Describes a water-side check valve 23a in which water along the flow path is guided to the water bypass flow path 18a, respectively.
A hot-water-side check valve 23 b having a similar configuration is also interposed in the hot-water inflow passage 13.

Next, the operation of the opening / closing / flow rate adjusting section 19 will be described with reference to FIGS.

In FIG. 5, the three inflow holes 51, 52, 53 of the fixed valve element 48 are all closed by the movable valve element 49, and the discharge is stopped. In this state, the lever 56a of the lever handle 56 is located at the center and at the uppermost position.

When the lever 56a is pushed down from the state shown in FIG. 5 to the lowermost position, the movable valve body 49 retreats to the state shown in FIG. 6, and the outflow portion 54 is aligned with the mixed hot water inflow hole 51. The appropriate temperature of the hot water set by the automatic temperature controller 16 is discharged. The discharge flow rate of the mixed hot water (suitable hot water) varies depending on the moving position of the movable valve element 49, and the maximum discharge flow rate is obtained when the movable valve body 49 is at the most retracted position (the state in FIG. 6).

Subsequently, when the lever 56a is rotated to the right, the movable valve element 49 is also rotated to the right, and the outflow portion 54 is aligned with both the mixed hot water inflow hole 51 and the water inflow hole 53, and the discharge passage Low-temperature hot water in which cold water is mixed with hot water of an appropriate temperature flows out to 36. In the course of the rotation of the movable valve body 49, the mixed hot water inflow hole 51 and the water inflow hole 53 of the outflow portion 54 are formed.
, The matching ratio of the mixed hot water inflow hole 51 decreases, and the matching ratio of the water inflow hole 53 increases. Then, by further rotating to the right, as shown in FIG. 8, the outflow portion 54 is aligned only with the water inflow hole 53, and only low-temperature water is discharged.

When the lever 56a is pulled upward in this state, the movable valve body 49 moves forward, and the outflow portion 54 and the water inflow portion 53 are out of alignment as shown in FIG. Can be stopped.

Further, from the state shown in FIG.
Is rotated to the left, the same operation as in the case where the water inflow hole 51 is aligned with the outflow portion 54 can be performed in the hot water inflow hole 52 as well.

That is, relative movement of the movable valve body 49 with respect to the solid valve body 48 due to the vertical tilting of the lever 56a,
Opening / closing and flow rate adjustment can be performed, and the temperature can be adjusted by relative rotation of the movable valve body 49 with respect to the solid valve body 48 due to the rotation operation of the lever 56a.

[0042]

[Effect of the Invention] Since the present invention has the above configuration,
The water supplied from the water supply source and the hot water supplied from the hot water supply source can be guided into the automatic temperature control section by swirling one check valve, whereby a sufficient flow rate flows into the automatic temperature control section. Water and hot water, and one check valve installed in the water and hot water inflow passage prevents backflow of water and hot water from the bypass flow path and the automatic temperature control unit, thereby facilitating maintenance. Can be planned.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a sectional view of a check valve.

FIG. 3 is a vertical sectional front view of a hot and cold water mixing tap.

FIG. 4 is a side sectional view of the same.

FIG. 5 is a plan view at the time of stopping the discharge for explaining the operation of the fixed valve element and the movable valve element.

FIG. 6 is a plan view at the time of discharge of mixed hot water for describing the operation of the fixed valve element and the movable valve element.

FIG. 7 is a plan view at the time of discharge of mixed hot water and cold water for describing the operation of the fixed valve body and the movable valve body.

FIG. 8 is a plan view at the time of discharging cold water for explaining the operation of the fixed valve element and the movable valve element.

FIG. 9 is a plan view at the time of stopping the discharge for explaining the operation of the fixed valve element and the movable valve element.

FIG. 10 is a block diagram showing a basic configuration.

DESCRIPTION OF SYMBOLS 10 Hot water mixer tap 11 Water supply source 12 Water inflow path 13 Hot water supply source 14 Hot water inflow path 15 Mixing chamber 16 Automatic temperature control section 17 Mixed water flow path 18a Water bypass flow path 18b Hot water bypass flow path 19 Opening / closing and flow rate control Part 23a Water side check valve 23b Hot water side check valve 25a, 25b Flow path 26a, 26b Valve seat 27a, 27b Valve body 28, 29 Coil spring 39, 41 Temperature control valve seat 42 Temperature control valve body 42a, 42b Control valve 44 Temperature sensor 48 Fixed valve element 49 Movable valve element 51, 52, 53 Inlet hole 54 Outflow part 56 Lever handle

Claims (2)

(57) [Scope of request for utility model registration] 1. A water inflow passage connected to a water supply source, a hot water inflow passage connected to a hot water supply source, a mixing chamber in which water and hot water are mixed to generate mixed hot water, the water inflow passage and the hot water inflow. An automatic temperature control unit disposed between the passage and the mixing chamber, for automatically adjusting the flow ratio of water and hot water flowing into the mixing chamber in accordance with the set temperature; and a mixed water flow path communicated with the mixing chamber. A water bypass path connecting the water inflow path and the mixed water flow path by bypassing the automatic temperature control section; and a hot water bypass path connecting the hot water inflow path and the mixed water flow path by bypassing the automatic temperature control section. An opening / closing flow rate control unit that is installed at a downstream end position of the bypass flow path and that controls opening and closing of the flow rate of water or hot water and the flow rate of mixed hot water flowing out of the bypass flow path to the mixed water flow path; The water bypass passage is disposed at a branch point from the water inflow passage. A water-side check valve provided with a backflow prevention means at a connection part with a water inflow path toward the automatic temperature control part and a connection part with a water bypass flow path, A hot-water-side check provided at a branch point from the hot-water inflow passage, and provided with a backflow prevention means at a connection portion with the hot-water inflow passage toward the automatic temperature control section and a connection portion with the hot-water bypass passage, respectively. A hot water mixer tap comprising a valve; 2. The hot and cold water mixing tap according to claim 1, wherein the check valve is formed in a cartridge shape.