JPH0117028B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a thermostatic mixing valve, and more particularly to a thermostatic mixing valve having a quantitative water stop function.

(Prior Art) Conventionally, this type of thermostatic mixing valve has various structures, for example, the one shown in FIG.
There is one disclosed in Japanese Utility Model Application No. 58-130170, shown in FIG.

The one in FIGS. 11 and 12 is the mixed water flow path 3.
A wax pellet type temperature sensing element 41 which expands and contracts depending on the temperature of the mixed water is provided in the temperature sensing element 41.
The temperature setting handle 42 provided on the main body 19 adjusts the temperature of the mixed water by operating the regulating valve 10 in conjunction with the temperature change of the mixed water by expanding and contracting the temperature sensing element 41 corresponding to the temperature change of the mixed water. The mixed water flow path 3 downstream of the regulating valve 10 includes a piston valve 43 and a relief valve 44 to control the temperature to a set temperature set by operation, and a volume water valve 45 that opens and closes the mixed water flow path 3. Linked water volume setting cam 4
6, consisting of a reduction gear train 47 and a blade wheel 48,
The amount of water is actuated by the mixed water passing through the water amount valve 45, and the water amount valve is closed when the amount of water reaches the set flow rate set by moving the water amount setting cam 46 with the water amount setting handle 49 provided on the main body 19. Functional section 50
It is designed to discharge a set amount of mixed water and automatically shut off the water.

However, such thermostatic mixing valves have a very complicated structure, are large, and are set by operating the respective setting handles on the main body, so temperature and flow settings are difficult to set. You must always go to the place where the main unit is installed.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to make it possible to adjust the temperature, start and stop discharge using one simple and compact valve, and use this valve to adjust the temperature, The objective is to electrically control quantitative water stoppage and also to be able to set temperature and flow rate using electrical operations.

(Means for Solving the Problems) The technical means taken by the present invention to solve the above problems are as follows: It consists of a fixed plate in which a communicating hot water inlet, a water inlet communicating with the water flow path, and a mixed water outlet communicating with the mixed water flow path are bored, and a movable plate superimposed on the fixed plate in a watertight and rotatable manner. On the sliding surface of the plate to the fixed plate, only the hot water inlet is connected to the mixed water outlet at a certain rotation angle position of the movable plate, and only the water inlet is connected to the mixed water outlet at another rotation angle position, respectively. In between, both the hot water inlet and water inlet are connected to the mixed water outlet, and the water passage area of both inlets is varied, and in other angular positions, neither the hot water inlet nor the water inlet are connected to the mixed water outlet. A regulating valve having a concave channel, a driving section for rotationally driving a movable plate of the regulating valve, an operating section, and a temperature for detecting the temperature of the fluid flowing through the mixed water channel. A sensor, a flow rate sensor provided in the mixed water flow path to detect the flow rate of the fluid flowing through the flow path, electrically connected to the drive section, the operating section, the temperature sensor, and the flow rate sensor, respectively, and set by the operating section. Based on the set temperature set and the temperature detected by the temperature sensor, the adjustment valve is operated to control the mixed water temperature, and the flow rate detected by the flow rate sensor is counted. When the total flow rate reaches the flow rate set on the operation unit, the adjustment valve is activated. and a control section that operates and stops the discharge.

(Function) According to the above means, the regulating valve and the constant flow valve are integrated into one compact valve consisting of a fixed plate and a movable plate, and this valve is set by the operation unit and sent as an electric signal to the control unit. The set temperature and flow rate that are transmitted, and the mixed water temperature that is detected by the temperature sensor and flow rate sensor and transmitted to the control unit as an electrical signal,
It is electrically operated by the control unit based on the discharge flow rate, and controls the temperature of the mixed water and stops the water at a constant rate.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in the schematic diagram of FIG. 1, the thermostatic mixing valve of this embodiment has a hot water flow path 1 connected to a hot water supply pipe 16, a water flow path 2 connected to a water supply pipe 17, and a mixed water flow connected to a flusher 18. Channels 3 are provided inside the main body 19, and the hot water channel 1 and the water channel 2 communicate with the mixed water channel 3 via a regulating valve 10.

A temperature sensor 1 is provided in the mixed water flow path 3.
3 and a flow rate sensor 14 are provided.

The main body 19 also includes an operating section 12 and a regulating valve 10.
It is equipped with a control section 15 that electrically controls.

The regulating valve 10 is composed of a fixed plate 7 fixed non-rotatably to a main body 19 and a movable plate 8 superimposed on the fixed plate 7 in a watertight and slidable manner. It is electrically operated via the

The drive unit 11 includes a pulse motor and a reducer that reduces the rotational output of the pulse motor, and the output shaft 2 of the reducer
0 is connected to the back surface of the movable plate 8 to rotate the movable plate 8 left and right.

The fixed plate 7 and the movable plate 8 are made of ceramic and have a mirror finish to ensure that their sliding surfaces are sufficiently watertight. A water inlet 5 communicating with the water flow path 2 and a mixed water outlet 6 communicating with the mixed water flow path 3 are opened through the fixed plate 7 in the thickness direction.

The hot water inlet 4, water inlet 5, and mixed water outlet 6 are arranged so that a line connecting them forms an isosceles triangle, and the mixed water outlet 6 is located at the apex of the isosceles triangle.

On the other hand, a concave channel 9 is formed in the movable plate 8 on its sliding surface with the fixed plate 7.

The flow path 9 has the shape shown in the figure, that is, approximately a crescent shape that is symmetrical with respect to the axis of symmetry of the movable plate 8.
In the rotational movement of the movable plate 8 which rotates in sliding contact with, only the hot water inlet 4 is connected to the mixed water outlet 6 at a certain predetermined rotation angle position, and only the water inlet 5 is connected to the mixed water outlet 6 at another predetermined rotation angle position. The hot water inlet 4 can be opened between the above two rotational angle positions.
Both the hot water inlet 4 and the water inlet 5 are connected to the mixing water outlet 6, and the water flow areas of the hot water inlet 4 and the water inlet 5 are varied, and furthermore, at other predetermined rotation angle positions, both the hot water inlet 4 and the water inlet 5 are mixed. It is formed in such a shape that it cannot communicate with the water outlet 6.

Thus, in such a regulating valve 10, the movable plate 8 rotates,
In the state shown in FIG. 4, only the water inlet 5 is opened corresponding to the flow path 9 and communicates with the mixed water outlet 6 via the flow path 9.

Therefore, in this state, only water flows into the mixed water channel 3.

Next, when the movable plate 8 is rotated clockwise from this state, the water inlet 5 begins to be closed by a portion of the movable plate 8 other than the flow path 9, and the water passage area gradually decreases.

On the other hand, the hot water inlet 4 gradually begins to open corresponding to the flow path 9, gradually increasing its water flow area.

Therefore, the mixed water flow path 3 includes a flow path 9 from the water inlet 5.
The cold water that has flowed into the flow path 9 and the hot water that has flowed into the flow path 9 from the hot water inlet 4 mix and flow, and the temperature of the mixed water increases as the movable plate 8 rotates clockwise.

In the state shown in FIG. 5, the water flow areas of the water inlet 5 and the hot water inlet 4 are approximately equal, so the proportions of cold water and hot water mixed are approximately equal, and in the state shown in FIG. 6, the hot water inlet 4 is Since the water inlet 5 is fully opened and the water inlet 5 is fully closed, only hot water flows into the mixed water flow path 3.

If the movable plate 8 is further rotated clockwise, the seventh
In the state shown in the figure, both the hot water inlet 4 and the water inlet 5 are closed, and the flow of hot water and water into the mixed water flow path 6 is completely stopped.

That is, the discharge of cold water, hot water, or mixed water from the collar 18 is stopped.

The movable plate 8 is also freely rotatable in the counterclockwise direction, and in that case, the operation is completely opposite to that described above.

The operation unit 12 digitally displays operation switches such as a water supply switch 21, a hot water supply switch 22, a quantitative water stop switch 23, a water stop switch 24, a temperature setting switch 25, a flow rate setting switch 26, and the set temperature. It is equipped with display sections such as a set temperature display section 27 and a set flow rate display section 28 that digitally displays the set flow rate, and outputs an electric signal according to the operation of each switch and sends it to the control section 15. In this case, it is provided on the front surface of the main body 19.

The temperature setting and flow rate setting by the operation section 12 will be explained with reference to FIG. 9. The set temperature display section 2
7. The set flow rate display section 28 digitally displays the set temperature and set flow rate that were set last time.
If you want to set a higher temperature this time, press the key 25a on the side of the temperature setting switch 25 labeled "hot". Each time this key 25a is pressed, the set temperature increases, and the temperature is displayed on the set temperature display section 27. When attempting to set a lower temperature, press the key 25b labeled "Lukewarm".

Furthermore, when attempting to set the set flow rate to a flow rate larger than the value displayed on the set flow rate display section 28, press the key 26a with the display of "Large" on the flow rate setting switch 26, and set the flow rate to a smaller value. When attempting to make settings, press the key 26b labeled "Small". Each time the keys 26a, 26b are pressed, the set flow rate increases or decreases, and the amount is displayed on the set flow rate display section 28.

The set temperature and set flow rate set using the operating section 12 are stored in the control section 15.

On the other hand, the aforementioned temperature sensor 13 provided in the mixed water flow path 3 is composed of a thermistor or the like, detects the temperature of the mixed water, outputs an electric signal according to the value, and sends the same signal to the control section 15. be.

The flow rate sensor 14 has an inlet 30 and an outlet 31 connected to each other by a flow path 29, as shown in FIG. 8, for example.
a casing 32 having a casing 32, an impeller 33 arranged in the middle of the flow passage 29 and rotated by being driven by the flowing water flowing through the flow passage 29, a magnet 35 integrally provided on the rotation shaft 34 of the impeller 33, and the above-mentioned Equipped with a detection element 36 that detects the magnetic field of the magnet 35,
The detection element 36 detects the number of pulses or pulse intervals caused by the rotation of the magnet 35, outputs an electric signal, and sends the same signal to the control section 15.

The control unit 15 is electrically connected to the drive unit 11, the temperature sensor 13, the flow rate sensor 14, the operation unit 12, and the power source, and receives an electric signal based on the operation from the operation unit 12, an electric signal from the temperature sensor 13, and a flow rate. Receives an electric signal from the sensor 14 and drives the drive unit 11 based on the signal to control the regulating valve 1.
0 to control water discharge, water stop, and temperature control.

That is, the control unit 15 operates the movable plate 8 of the regulating valve 10 via the drive unit 11 when any one of the hot water supply switch 22, the water supply switch 21, and the metered water stop switch 23 of the operation unit 12 is pressed. , when the hot water supply switch 22 and the metered water stop switch 23 are pressed, mixed water at the set temperature is supplied to the water supply switch 21.
When pressed, cold water is discharged.
Further, the control unit 15 compares and determines the temperature set by the operation unit 12 and the mixed water temperature detected by the temperature sensor 13, and depending on the result, moves the movable plate 8 of the regulating valve 10 to the left and right via the drive unit 11. It rotates to control the temperature of the mixed water.

Furthermore, the control unit 15 calculates the instantaneous flow rate from the number of pulses or the pulse interval detected by the detection element 36 of the flow sensor 14, counts the flow rate, and when the total flow rate reaches the set flow rate set by the operation unit 12, the drive unit 11, the movable plate 8 of the regulating valve 10 is automatically operated to shut off water.

The fixed amount water cutoff is performed only when the fixed amount water cutoff switch 23 is pressed to discharge water, and in other cases, the water cutoff switch 24 is pressed to stop the water.

In addition, in FIG. 1, 37 is a strainer, 38
is a chiyaki dialect.

In the above description, the operating section 12 is provided on the main body 19, but the operating section 12 can be separated from the main body 19 and provided at any location.
It is also possible to connect it to another controller so that it can also be operated by the controller.

Furthermore, it is of course possible to implement this thermostatic mixing valve in the form and form of a water faucet as shown in FIG. 9, but as shown in FIG.
Water heater 39 such as a gas instantaneous water heater and bath spout 1
Interposed in the middle of the hot water supply pipe 16 that communicates with
It is also optional to implement it as part of a fully automatic bathing device that automatically performs everything from supplying a fixed amount of hot water to the bathtub 40 to reheating it.

The operation unit 12 can be operated not only by pressing a switch key, but also by electrical signals using a telephone or the like.

(Effects) Since the present invention has the above configuration, it has the following advantages.

(1) One valve has all the functions of starting and stopping discharge, adjusting temperature, and stopping fixed amount of water, and that valve has two functions.
It is made up of a flat plate and is operated by a drive device such as a motor, making it compact and simple in structure.

(2) The adjustment valve is operated electrically by comparing the set temperature set on the operation unit and the mixed water temperature detected by the temperature sensor installed in the mixed water flow path.
Unlike conventional thermostatic mixing valves, there is no need for a bulky temperature sensing element, nor is there a need for a complicated mechanism for interlocking a regulating valve with a temperature sensing element.

(3) The flow rate detected by the flow rate sensor installed in the mixed water flow path is counted by the control unit, and when the total flow rate reaches the set flow rate, the regulating valve is electrically operated and closed. Does not require an undercurrent function.

(4) Since flow rate settings and temperature settings are performed electrically and all other operations are performed electrically, the operating section does not necessarily need to be installed on the main body, but can be installed at any location away from the main body, making it easy to operate. This eliminates the hassle of having to go all the way to the location where the main unit is installed.

(5) The effects of items (1) to (4) above can be combined to completely change the image of conventional thermostatic mixing valves.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a thermostatic mixing valve showing one embodiment of the present invention, Fig. 2 is an explanatory diagram explaining the flow of hot water and water, Fig. 3 is a sectional view of the regulating valve portion, and Figs. FIG. 7 is a cross-sectional view of the operation taken along line X-X in FIG. 3, FIG. 8 is a cross-sectional view showing an example of a flow rate sensor, and FIG. 9 is a perspective view showing an example of the external appearance of the thermostatic mixing valve of the present invention. figure,
Fig. 10 is a schematic diagram showing an example of the usage state, Fig. 11
The figure shows an example of a conventional thermostatic mixing valve in a side view showing the main parts in a longitudinal section, and FIG. 12 is a front view showing the main parts in a longitudinal section. 1: hot water flow path, 2: water flow path, 3: mixed water flow path,
4: Hot water inlet, 5: Water inlet, 6: Mixed water outlet, 7:
Fixed plate, 8: Movable plate, 9: Flow path, 10: Adjustment valve,
11: Drive section, 12: Operation section, 13: Temperature sensor, 14: Flow rate sensor, 15: Control section.

Claims (1)

[Claims] 1. Drill a hot water flow path, a water flow path, a mixed water flow path that connects to both of these flow paths, a hot water inlet that connects to the hot water flow path, a water inlet that connects to the water flow path, and a mixed water outlet that connects to the mixed water flow path. It consists of a fixed plate and a movable plate superimposed on the fixed plate in a watertight and rotatable manner, and the sliding surface of the movable plate to the fixed plate has only the hot water inlet at a certain rotational angle position. At other rotation angle positions, only the water inlet is connected to the mixing water outlet, and between the two angular positions, both the hot water inlet and the water inlet are connected to the mixing water outlet, and the water flow area of both inlets is A regulating valve having a recessed flow path that prevents both the hot water inlet and the water inlet from communicating with the mixed water outlet at other angular positions, and a drive unit that rotationally drives a movable plate of the regulating valve. and,
an operating section, a temperature sensor provided in the mixed water flow path to detect the temperature of the fluid flowing through the flow path, and a flow rate sensor provided in the mixed water flow path to detect the flow rate of the fluid flowing in the flow path; The driving part, the operating part, the temperature sensor, and the flow rate sensor are electrically connected to each other, and the regulating valve is operated based on the set temperature set in the operating part and the temperature detected by the temperature sensor to control the mixed water temperature and the flow rate. A thermostatic mixing valve characterized by comprising a control unit that counts the flow rate detected by the sensor and operates a regulating valve to stop discharge when the total flow rate reaches the flow rate set by the operation unit.