JP2661244B2 - Automatic pressure control valve - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic pressure control temperature control valve using a pressure control valve that obtains an appropriate temperature by mixing hot water and water.

2. Description of the Related Art Conventionally, there has been an automatic pressure control temperature control valve of this type as shown in FIG. In FIG. 3, hot water and water flowing through the hot water flow path 1 and the water flow path 2 are equalized in secondary pressure by the pressure regulating valve 3. That is, the pressure regulating valve 3 includes a hot water side valve body 4, a hot water side valve seat 5 for reducing the primary pressure PH of the hot water flow path 1, and a primary pressure of the water flow path 2.
Water-side valve body 6, water-side valve seat 7, and hot-side valve body 4 for decompressing PC1
And a piston 9 for partitioning the flow path of hot water and water, and a secondary pressure of hot water and water.
It operates with the pressure difference between PH2 and PC2. Even if the pressure of the hot water or the water changes suddenly, the pressure regulating valve 3 moves by the secondary pressure difference and acts so that the secondary pressures of the hot water and the water are kept very equal. The mixing ratio of hot water and water is changed by moving the temperature control valve 12 energized by the motor 11 left and right to change the mixing temperature.

The mixed hot water mixed in the mixing section 13 is supplied through the flow regulating valve 14, but the temperature of the mixed hot water is detected by the thermistor 15, and the flow rate thereof is detected by the flow rate sensor 16, and the mixed hot water matches the set value of the setter 17. The controller 18 energizes the motor 11 and the flow control valve 14 to cause the motor 18 to operate.

Problems to be Solved by the Invention However, in the above configuration, since the pressure regulating valve 3 and the temperature regulating valve 12 are independent, there is a problem that the configuration is large and the configuration is complicated.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an automatic pressure control temperature control valve having a small size and a simplified configuration.

Means for Solving the Problems In order to solve the above problems, the automatic pressure regulating temperature control valve of the present invention is configured such that a hot water side valve element, a water side valve element, and a piston for partitioning a hot water side and a water side flow path are connected. The same axis, a variable bias means for applying a variable bias force to the same axis, a secondary side of the hot water side valve element and the water side valve element, and a junction between the hot water flow path and the water flow path. And a hot-water-side resistance means and a water-side resistance means whose resistance value is varied according to the flow rate of hot water.

Further, the apparatus has a hot water supply flow rate setting device and a controller, and is configured to adjust the resistance of the hot water side resistance means and the water side resistance means.

With the above configuration, the automatic pressure regulating temperature control valve of the present invention can control the mixing ratio of hot water and water by changing the bias force by the variable bias means and changing the resistance values of the hot water side resistance means and the water side resistance means. In addition to the adjustment, the valve functions as a pressure regulating valve when the water pressure or water pressure fluctuates or when the flow rate is changed, and a single valve combines the functions of the temperature regulating valve and the pressure regulating valve, thereby reducing the size and simplifying the configuration. It has been realized.

Further, the flow rate is adjusted by the hot water side resistance means and the water side resistance means.

Embodiment Next, an embodiment of the present invention will be described with reference to FIG. 1 and FIG.

In FIG. 1, a check valve provided in the hot water flow path 19 and the water flow path 20
Hot water and water are supplied through 21, 22 and reach the cylinder 14 provided in the valve housing 23. The end face of the cylinder 24 has a hot water side valve seat
25 and a water-side valve seat 26 are formed.
The primary pressure is reduced by the gap between the water and the water-side valve body 28. Hot water side valve element 27 and water side valve element 28 are coaxial 29
A piston 30 is provided at the center to partition the hot water flow path 19 and the water flow path 20. The same shaft 29 is provided with twist blades 31 and 32 which also serve as a guide and a rotational force applying means. A permanent magnet 33 is attached to one end of the same shaft 29, and the permanent magnet 33 is attracted or repelled by a solenoid 35 provided outside the partition wall 34 to be driven.

The pressure receiving areas of the hot water side valve element 27, the water side valve element 28, and the piston 30 are substantially equal, the primary pressures of the hot water and the water cancel each other, and if the applied force by the solenoid 35 is zero, the secondary pressure Operate to be equal. When a force is applied by the solenoid 35, the pressure on one side differs from the other by the value obtained by dividing the applied force by the pressure receiving area. Hot-side valve body 27 and water-side valve body
On the downstream side of 28, between the hot water flow path 19 and the mixing chamber 36 corresponding to the junction of the water flow paths 20, hot water resistance means 37 and water resistance means 38 whose resistance values are variable according to the flow rate of hot water are provided. Is provided.

The hot-water-side resistance means 37 and the water-side resistance means 38 are provided on a drive shaft 39, and the drive shaft 39 is driven by an externally provided motor 40 via a gear box and a linear interlocking conversion mechanism.

The hot-water-side resistance means 37 and the water-side resistance means 38 are provided to face the mixing chamber 36, and provide resistance to the flow, reduce the flow and collide to promote the mixing, and thermistor 41 Can be installed near the mixing chamber 36, and the control response is enhanced. The signal of the thermistor 41 is sent to the controller 42 and compared with the set value of the setter 43 to control the solenoid 35 to obtain an appropriate temperature. The signal of the flow sensor 44 is also compared with the set value of the setting device 43, and the controller 42 controls the motor 40 to obtain an appropriate flow.

 Next, the operation of this embodiment will be described.

First, the principle of this method will be briefly described with reference to FIGS. 2 (a) and 2 (b).

FIG. 2A is a diagram modeled using an electric circuit in order to make the conventional system easy to understand. The pressure level on the secondary side by the pressure regulating valve 3 is equal between the hot water side flow path 1 and the water side flow path 2. Where the pressures of hot water and water are equal, the mixing valve 12 which is a resistance element on the hot water side and the mixing valve 12 'which is a resistance element on the water side change their resistance values in inverse proportion, and consequently correspond to the flow rate. Current value IH and IC are changed.

FIG. 2 (b) is a diagram modeling the method of the present invention. In the method of the present invention, a bias force is applied to the pressure regulating valve by the variable bias means, and the voltage levels VH and VC on the hot water side and the water side are changed in an electric circuit. Also, by changing the resistance values of the hot water side resistance means 37 and the water side resistance means 38, IH corresponding to the hot water side flow rate and IC corresponding to the water side flow rate are changed, and the mixing ratio is adjusted. The advantage of changing the resistance values of the hot-water resistance means 37 and the water-side resistance means 38 is that if the flow rate is reduced with a fixed resistance, the pressure loss at the fixed resistance part is reduced. This is because it is easy to be affected by the accuracy of the applied bias force, and the temperature accuracy and the temperature fluctuation at the time of transient fluctuation are prevented from becoming worse.

As a specific operation, when the setting device 43 is operated to instruct hot water, the hot-water-side resistance means 37 and the water-side resistance means 38 move to the left in the drawing, and hot water and water flow out.

Hot water and water enter the cylinder 24 through the hot water flow path 19 and the water flow path 20, pass through the hot water side valve element 27 and the water side valve
The pressure on one side is increased by the pressure corresponding to the force applied by For example, when a suction force is applied by a solenoid, the water pressure is increased by a pressure corresponding to a value obtained by dividing the suction force by a pressure receiving area of the valve element or the piston. Pressure increases. The flow rates of the hot water side and the water side are determined based on this pressure and the resistance values of the hot water side resistance means 37 and the water side resistance means 38, and the temperature of the mixed hot water is determined. The resistance values of the Yukawa resistance means 37 and the water-side resistance means 38 may be varied linearly, but are stepwise in this example for simplification of control. For example, it is set so that it can be changed stepwise to 20 / min, 10 / min, 5 / min.

This value is obtained by performing feedback control using the signal of the flow sensor 44.

When the mixing ratio of hot water and water is not appropriate and the temperature detected by the thermistor 39 does not match the temperature set by the setting device 41, the bias force by the solenoid 35 is further changed to change the mixing ratio, and Is what you have gained. When hot and cold water is flowing, the flow exerts force on the twisting blades 31, 32, and the coaxial shaft 29 and the elements fixed thereto rotate. By this rotation, adhesion of scale components contained in hot water or water is prevented, and the sliding force between piston 30 and cylinder 24 is reduced. If the tap pressure or water pressure fluctuates due to the use of other plugs during the supply of mixed hot water, it functions to keep the secondary pressure in the same state as before the change, as with the conventional pressure regulating valve. Therefore, the temperature of the mixed hot water does not greatly change. Further, even when the flow rate is changed, the fluctuation of the mixed hot water can be reduced because the secondary pressure is maintained at a constant differential pressure relationship.

In addition, when tapping the mixed hot water at a low temperature of 30 ° C or 35 ° C, the total pressure is limited because the secondary pressure is regulated to the same pressure as that of the normally lower pressure with the conventional pressure regulating valve. In such a case, the hydraulic pressure side can be made higher than the hot water pressure side by an amount obtained by dividing the applied force by the solenoid 35 by the light receiving pressure receiving area, so that the total hot water discharge amount can be increased.

Further, unlike the fixed resistance, since the resistance values of the hot-water resistance means 37 and the water-side resistance means 38 can be changed, even if the flow rate is particularly small, the precision of the variable bias force and the precision of the pressure balance are hardly affected. Has become.

When the hot water supply is stopped, if such an instruction is given by the setting device 43, the hot water side resistance means 37 and the water side resistance means 38 are shifted to the right in FIG. 1 and the packing portion contacts the valve seat. Water shutoff is performed. During the stop of hot water supply, the power supply to the solenoid 35 is cut off.

The hot water side resistance means and the water side resistance means may be driven by independent driving means in addition to the means driven by one motor as in the above embodiment. It is also conceivable that the water is stopped by another valve and only the flow rate is adjusted. Further, the flow rate may be adjusted by controlling the opening of the valve.

Effects of the Invention As described above, the following effects can be obtained according to the automatic pressure control temperature control valve of the present invention.

(1) Since the functions of the pressure regulating valve and the temperature regulating valve can be performed by the same valve, compactness and simplification of the configuration can be achieved, and a difference in pressure between hot water and water can be provided. Has the advantage that the flow rate at the time of low-temperature tapping can be increased under conditions higher than the hot water pressure. Further, by having the hot-water-side resistance means and the water-side resistance means, the flow rate ratio of the hot water and the water can be determined accurately and the mixing ratio can be prevented from becoming unstable. Furthermore, since the resistance values of the hot-water-side resistance means and the water-side resistance means are variable, even if the flow rate decreases, the precision of the variable bias means and the pressure adjustment precision may be less affected.

(2) By adjusting the flow rate by adjusting the resistance by the hot-water resistance means and the water-side resistance means, it is not necessary to additionally provide a flow control valve or a water stop valve, and the configuration can be further streamlined.
When the flow rate is small and the resistance is desired to be increased, the resistance is automatically applied when the flow is completed.

[Brief description of the drawings]

FIG. 1 is a cutaway sectional view showing an automatic pressure regulating temperature control valve according to a first embodiment of the present invention, FIG. 2 (a) is a principle model diagram of a conventional automatic pressure regulating temperature control valve, and FIG. 3) is a principle model diagram of the automatic pressure control valve of the present invention, and FIG. 3 is a sectional view of a cutout of the conventional automatic pressure control valve. 19 ... hot water flow path, 20 ... water flow path, 25 ... hot water side valve seat, 26 ...
Water side valve seat, 27 ... Hot water side valve element, 28 ... Water side valve element, 29 ... Coaxial, 30 ... Piston, 35 ... Solenoid (variable bias means), 37 ... Hot water side resistance means, 38 …… Water-side resistance means,
42: Controller, 43: Setting device (hot water supply flow rate setting device).

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yasuo Kidouchi 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Bunichi Shiba 1006 Odakadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial (56) References JP-A-2-199385 (JP, A) JP-A-2-236076 (JP, A) JP-A-63-153612 (JP, A)

Claims (2)

(57) [Claims] A hot water flow path and a water flow path; a hot water side valve body, a hot water side valve seat, a water side valve body, a water side valve seat for reducing the primary pressure of the hot water flow path and the water flow path; A piston connected on the same axis as the side valve element and the water-side valve element to partition a flow path between the hot water side and the water side; a variable bias means for applying a variable bias force to the same axis; An automatic apparatus provided with hot-water resistance means and water-side resistance means provided between the secondary side of the valve element and the junction of the hot water flow path and the water flow path, the resistance value of which is variable according to the flow rate of hot water supply. Pressure regulating valve. 2. A hot water supply flow rate setting device and a controller, wherein the controller adjusts the flow rate by adjusting the resistance of the hot water side resistance means and the water side resistance means according to the setting of the hot water supply flow rate setting device. The automatic pressure control temperature control valve according to claim 1 performed.