JP2712587B2 - 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 for adjusting 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. 2, there are a hot water flow path 1 and a water flow path 2, an automatic pressure regulating valve 3 for equalizing the pressures of the two flow paths, and a mixing valve 4 downstream of the automatic pressure regulating valve 3. A coupling mechanism 8 for transmitting the rotational motion of the motor 6 to the valve shaft 7 of the mixing valve 4, a screw mechanism 9 for performing thrust conversion of the rotation of the valve shaft 7, and a downstream side of the mixing valve 4. And a temperature detector 10 provided.

However, in the above-described configuration, the automatic pressure regulating valve 3 and the mixing valve 4 are independent and large.

In addition, if the automatic pressure regulating valve 3 is not provided, the driving force for driving the mixing valve 4 changes due to the pressure of the hot and cold water applied to the mixing valve 4, and a very large driving force which is not affected by the driving force is required.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a hot and cold water mixing apparatus which has a simple configuration and is compact and is not affected by the level of hot and cold water.

Means for Solving the Problems In order to solve the above problems, the hot and cold water mixing device of the present invention is
A hot water flow path, a water flow path, a cylinder having a plurality of adjusting holes on an outer periphery for adjusting a flow rate of the hot water flow path and a flow rate of the water flow path in inverse proportion, and provided inside the cylinder so as to face the hot / water side. ,
Two turbulence plates having a large number of small holes in the axial direction, a spring for urging the cylinder in a direction in which a water flow path opens, and a temperature for detecting the temperature of mixed water that has passed through the two turbulence plates and mixed. A detector, a driving unit for electrically driving the cylinder, a setter for setting the temperature of the mixed water, and a temperature set by the setter. And a controller for controlling the means.

Operation With the configuration described above, the cylinder is driven by the driving device against the spring urged, so that the flow rate on the hot water side increases while the flow rate on the water side decreases. That is, by varying the output of the drive device, the flow rate ratio of hot water changes and the temperature of the mixed water becomes variable, and feedback control is performed by a signal from the temperature detector to obtain the mixed water at a desired temperature.

An embodiment of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a sectional view of a hot water mixing apparatus according to one embodiment of the present invention. In FIG. 1, a hot water flow path 11 and a water flow path 12,
There is a valve housing 14 with one outlet 13
A cylinder 15 which slides inside has a hot water side adjusting hole 16 for adjusting the hot water side flow rate on the outer periphery thereof and a water side adjusting hole for adjusting the water side flow rate.
The hot water and the cold water flow from the circumferential direction of the cylinder 15 toward the center.

A hot-water-side disturbing plate 19 and a water-side disturbing plate 20 having a number of small holes 18 in the axial direction are provided inside the cylinder 15 so that hot and cold water passing through the two disturbing plates 19 and 20 collide with each other. The temperature of the mixed water is detected by the temperature detector 22 after passing through the orifice 21. The cylinder 15 has a spring
There is a plunger 26 which is urged in the water side fully open direction by 23 and is driven by a solenoid 25 as an electric drive means 24,
The plunger 26 and the cylinder 15 connecting shaft 27 are directly connected. A setting device 28 for setting the temperature of the mixed water; and a controller for controlling the driving means 24 while detecting a signal from the temperature detector 22 with respect to the temperature set by the setting device 28.
It consists of 29.

Next, the operation will be described. When the solenoid 25 is energized, the plunger 26 is pushed out and the connected cylinder 15 slides over the spring 23, and the hot water side adjusting hole 16
The water-side adjustment hole 17 is opposite to the water flow path.
Start reducing the open area facing the 12. That is, the solenoid
The sprung ring 23 that urges the cylinder 15 by the current value that flows through 25 and the plunger 26 that is pushed out by electromagnetic force
Is changed, that is, the ratio of the opening area facing the hot water flow path 11 to the opening area facing the water flow path 12 changes, and the temperature of the mixed water can be freely controlled. Also, the hot and cold water that has passed through the hot water side adjusting hole 16 and the water side adjusting hole provided in the cylinder 15 flows from the circumferential direction of the cylinder 15 toward the center, and the hot water inside the cylinder 15 located downstream therefrom. A pressure loss occurs when passing through the side disturbance plate 19 and the water side disturbance plate 20. Each disturbance plate (19,2
0) will be loaded. That is, for each secondary pressure after hot and cold water flows from the circumferential direction of the cylinder 15 toward the center, the load received by the cylinder 15, the urging force of the spring 23, and the electromagnetic force received by the plunger 26 balance. When the cylinder 15 is stabilized at a position balanced with respect to a predetermined current value,
For example, when the water pressure fluctuates and the secondary pressure on the water side increases, the load applied to the water-side disturbance plate 20 increases, and the cylinder 15 moves. The moving direction is a direction in which the flow rate of the water is reduced and the flow rate of the hot water is increased. In spite of a slight pressure change, the flow rate ratio is not changed, and is always kept constant.

With the above configuration, when the desired temperature of the mixed water is set by the setter 28, the controller 29 detects the signal of the temperature detector 22, and adjusts the current value to the solenoid 25 as the driving means 24 in accordance with the deviation amount. The flow rate of the hot water in the cylinder 15
11. An opening area for the water flow path 12 is adjusted to obtain mixed water at a desired temperature. In addition, the cylinder 15 functioning as a mixing valve cancels out the primary pressure of the hot and cold water on the outer periphery thereof, and balances the secondary pressure after adjusting the flow rate. A stable mixed water can be obtained against fluctuations.

Also, a hot water side disturbance plate 19 and a water side disturbance plate 20 are provided to face each other,
Since the hot and cold water that has passed through the two disturbance plates 19 and 20 collide and mix, the mixing of hot and cold water is promoted. Has the effect of preventing the detected value from becoming stable and the control from becoming oscillatory.

Effects of the Invention As described above, according to the hot and cold water mixing apparatus of the present invention, the following effects can be obtained.

(1) The structure is simple, easy to assemble, and compact.

(2) Because of the configuration that balances the pressure of hot and cold water,
Despite the pressure fluctuation, stable temperature of the mixed water can be obtained and it is safe.

(3) With a configuration in which mixing of hot and cold water is promoted, there is an effect that control in which the detection value of the temperature detector is stabilized does not become oscillating.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a hot water mixing apparatus according to one embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional hot water mixing apparatus. 11 ... hot water flow path, 12 ... water flow path, 15 ... cylinder, 16, 17
... adjusting holes, 19, 20 ... disturbing plate, 22 ... temperature detector, 23
…… Spring, 24 …… Drive means, 28 …… Setter, 29…
... controller.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yukio Nagaoka 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-house (56) References Japanese Utility Model Showa 58-187670 (JP, U) Japanese Utility Model Showa 60-100468 (JP, U)

Claims (1)

(57) [Claims] 1. A cylinder having a hot water flow path, a water flow path, a plurality of control holes on an outer periphery for adjusting a flow rate of the hot water flow path and a flow rate of the water flow path in inverse proportion, and a hot water side / water inside the cylinder. Two disturbing plates having a large number of small holes in the axial direction provided opposite to each other, a spring for urging the cylinder in a direction in which a water flow path opens, and mixed water mixed through the two disturbing plates A temperature detector for detecting the temperature of the, a setting means for setting the temperature of the mixed water, and a driving means for electrically driving the cylinder,
A hot water mixing apparatus comprising: a controller that controls the driving unit while detecting a signal from a temperature detector with respect to the temperature set by the setter.