JP2820472B2 - Hot water mixing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water mixing apparatus that adjusts a mixing ratio of hot water and water to obtain an optimum mixed hot water temperature.

2. Description of the Related Art Conventionally, this type of hot water mixing apparatus has been as shown in FIG.

In FIG. 4, 1 is a hot water flow path, 2 is a water flow path, and an automatic pressure regulating valve 3 is provided in association with each flow path. The automatic pressure regulating valve 3 includes a hot water side valve body 4 and a hot water side valve seat 5 for reducing the primary pressure PH1 of the hot water flow path 1, a water side valve body 6 for reducing the primary pressure PC1 of the water flow path 2, It comprises a water-side valve seat 7, a valve shaft 8 connecting the hot-water-side valve body 4 and the water-side valve body 6, and a piston 9 that operates with a pressure difference between the primary pressures PH1 and PC1 after decompression of hot water and water. Even if the pressure of hot water or water changes suddenly, the automatic pressure regulating valve 3 moves at that pressure, and acts so that the secondary pressure PH2 of the hot water and water and PC2 are always kept equal. Each of the hot water side valve element 4 and the water side valve element 6 has a plurality of blades 4a and 6a as rotating force generating means, and the automatic pressure regulating valve 3 is rotated by the water flow with these blades to prevent adhesion of dust and scale. The mixing ratio of hot water and water is varied by moving a temperature control valve 12 energized by a motor 11 having a gear 10 to the left and right to change the mixing temperature. Reference numeral 13 denotes a mixing section of hot water and water. After mixing, the hot water is discharged through a flow rate control opening / closing valve 14, and its temperature is detected by a thermistor 15, its flow rate is detected by a flow rate sensor 16, The controller 18 energizes the motor 11 and the flow control on-off valve 14 so as to match the above.

Problems to be Solved by the Invention However, in the above-described configuration, the automatic pressure regulating valve 3 and the temperature regulating valve 12 are independent of each other, so that the size becomes large.

The present invention has been made to solve the conventional problem, and an object of the present invention is to improve the control performance of a mixing ratio in a mixing apparatus.

Means for Solving the Problems To achieve the above object, a hot water mixing apparatus of the present invention comprises a hot water flow path and a water flow path, and a hot water side valve element and a water side valve for adjusting the flow rates of the hot water flow path and the water flow path. Body, a mixing section of the hot water flow path and the water flow path, a variable electromagnetic operating force generating means for applying an operating force to both valve bodies, and an AC signal generating means for superimposing an alternating operating force on the variable operating force generating means. It is a thing.

Operation With the above configuration, the variable operating force generating means operates the hot water side valve element and the water side valve element to adjust the mixing ratio, and changes the alternating operation force according to the positions of both valve elements.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the hot and cold water mixing apparatus, and the same parts as those in FIG. 4 are denoted by the same reference numerals. On the water flow path 2 side, the variable operating force generating means 19 comprises an iron core 20 and a coil 21 which is waterproof and insulated around the iron core 20, and applies an electromagnetic force to the iron core 20 by passing a current through the coil 21. Thereby, the current of the coil 21 can be controlled, and the iron core 20 can be moved by applying a force from outside without contacting the rail without the rail of the movable part. When the coil 21 is energized, the iron core 20 moves downward, and the water-side valve body 6, a water-side valve shaft 6a integrated with the valve body via a connecting shaft 22 and an abutment body 23 to which the iron core 20 is attached, The hot water side valve shaft 4 b and the hot water side valve shaft 4 integrated with the hot water side valve element 4 are integrally moved against the force of the main spring 24. The hot-water-side valve body 4, the hot-water-side valve shaft 4a, the water-side valve shaft 6a, and the water-side valve body 6 move together to form the automatic pressure regulating valve 3. 25 is a plug. The hot-water-side valve element 4 and the water-side valve element 6 constitute a valve with holes 4b and 6b provided on the circumference, respectively. Hot water and water that have passed through the holes 6b of the water-side valve body 6, respectively, pass through the hot-water-side variable throttle 26 and the water-side variable throttle 27, and are mixed in the mixing path 13. The variable throttles 26 and 27 are pressed against the inside of the hot water side valve body 4 and the water side valve body 6 by springs 30 and 31, respectively. For example, when the hot water flows, a differential pressure is generated on both surfaces of the hot water side variable throttle 26, and the hot water side variable throttle 26 opens against the force of the spring 30. The opening of the variable throttle 26 is determined according to the flow rate of the fluid passing therethrough. The relationship between the flow rate and the pressure difference can be adjusted by changing the force of the spring 30. The same applies to the water side. The fluids that have passed through the variable throttles 26 and 27 are combined at the mixing section 13 to mix hot water and water.
The controller 18 has a built-in AC signal generating means 18a, and a signal from the AC signal generating means 18a is supplied so as to be superimposed on the coil current.
19 is provided with alternation operating force. The alternating operation force causes the valve body to vibrate minutely, preventing a decrease in frictional force and preventing the scale from adhering.

Next, the operation of the present invention will be described. Controller 18 to coil 21
When the current increases, a strong downward force is generated in the iron core 20 to urge the automatic pressure regulating valve 3 downward. As a result, the water side is closed and the hot water side is opened, and the outlet pressure of the hot water side valve element 4 and the outlet pressure of the water side valve element 6 respectively change and act as the automatic pressure regulating valve 3 to balance. As a result, the temperature of the mixed hot water increases. When the current of the coil 21 is reduced, the downward force on the iron core 20 is reduced, and the force of the main spring 24 moves the automatic pressure regulating valve 3 upward to open the water side and close the hot water side. As a result, the temperature of the mixed hot water decreases. FIG. 2 shows the relationship between the current supplied to the coil 21 of the variable operating force generating means 19, the amount of hot water and the amount of water, and acts as a mixing valve for adjusting the mixing ratio of hot water and water by changing the current. FIG. 3 shows a temporal change of the current. In FIG. 3, i3 indicates the current waveform when the current I3 in FIG. 2 is used, that is, when the hot water side valve element 4 and the water side valve element 6 are each opened appropriately. At this time, the AC signal largely overlaps. The frictional force has been reduced to make the movement smooth. I2 and i4 in FIG. 3 show current waveforms when the currents I2 and I4 in FIG. 2, that is, when one of the hot water side valve element 4 and the water side valve element 6 is largely open and the other is almost fully closed. At this time, the AC signal is superimposed to be small. I1 in FIG. 3 is the current value I1 in FIG.
Shows the current waveform when the hot water side valve element 4 is fully opened and the hot water side valve element 4 is fully opened, and the position of the water fully opened state is maintained without stopping the weight of the AC signal to reduce the frictional force. FIG. 3 i5 shows the second
It shows a current waveform when the current value I5 in the figure, that is, when the water-side valve body 6 is fully closed and the hot-water side valve body 4 is fully open. To prevent valve vibration.

The mixed hot water temperature is detected by the thermistor 15 and calculated by the controller 18 to control the current to the coil 21.

Effect of the Invention As described above, the hot water mixing apparatus of the present invention provides a hot water flow path and a water flow path, a hot water side valve element and a water side valve element for adjusting the flow rates of the hot water flow path and the water flow path, a hot water flow path and a water flow A mixing section of the road, a variable operating force generating means for applying an electromagnetic operating force to the two valve bodies, and an alternating current signal generating means for superimposing an alternating operating force on the variable operating force generating means, according to the positions of the two valve bodies. When mixing, the alternation operation force was changed, so that the amount of alternation operation was reduced and the valve body was moved smoothly to enhance the control performance.When the hot and cold water was fully open or fully closed, the alternation operation force was reduced. The valve body is held at a reduced value, and the supply of only water or hot water can be reliably obtained.

[Brief description of the drawings]

1 is a cross-sectional view of a hot water mixing apparatus according to one embodiment of the present invention, FIG. 2 is a characteristic diagram of current and flow rate of the hot water mixing apparatus, FIG. 3 is a current waveform diagram of the hot water mixing apparatus, and FIG. FIG. 3 is a cross-sectional view illustrating a configuration of a mixing device. 1 hot water flow path, 2 water flow path, 4 hot water side valve element, 6
Water-side valve element, 13: Mixing section, 18a: AC signal generating means, 1
9… Variable operating force generating means.

Continuing on the front page (72) Inventor Yasuo Kidouchi 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) F24D 17/00 F16K 31/06 310 G05D 23/13

Claims (1)

(57) [Claims] A hot water flow path and a water flow path; a hot water side valve element and a water side valve element for adjusting a flow rate of the hot water flow path and the water flow path; a mixing section of the hot water flow path and the water flow path; A variable operating force generating means for applying an electromagnetic operating force to the two valve bodies; and an AC signal generating means for superimposing an alternating operating force on the variable operating force generating means, wherein the alternating operation is performed according to the positions of the two valve bodies. A hot water mixing device that changes power.