JPH02240480A - Hot-cold water mixing control device - Google Patents

Abstract

PURPOSE:To early adjust a temperature and attempt the stabilization by connecting the respective valve units of hot and cold water flow paths to a valve stem given variable bias force by a variable bias means controlled by a control means and overlapping its drive signal with an irregular AC signal. CONSTITUTION:A variable bias means 20, giving bias force against an urging means 19 to a valve stem 8 opposing forces of hot and cold water flow paths 1, 2 and hot and cold water side valve units 4, 6, is provided. This variable bias means 20 is constituted of a plunger 21 made of magnetic material and a coil 22 applying a drive signal overlapped with an irregular AC signal. Accordingly, adjustment can be stably attained with responsiveness improved by preventing generation of resonance vibration of the valve shaft with less sliding resistance at the time of starting drive.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water mixing control device that adjusts the mixing ratio of hot water and water to obtain an optimal mixed water temperature.

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

In FIG. 4, ▪ 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 that reduces the primary pressure PH1 of the hot water flow path 1, a hot water side valve seat 5, a water side valve body 6 that reduces the pressure of 1 pyrotechnic power Pct of the water flow path 2, and a water side valve body 6 that reduces the pressure of 1 pyrotechnic power Pct of the water flow path 2. Side valve seat 7, hot water side valve body 4, and water side valve body 6
1 pyrotechnic PH1 after depressurizing hot water and water,
It is composed of a piston 9 that operates based on the PCI pressure difference, and even if the pressure of hot water or water suddenly changes, the automatic pressure regulating valve 3 moves with that pressure, and the secondary pressures PH2 and PO2 of hot water and water are always maintained. It works to maintain equality. The mixing ratio of hot water and water is varied by moving a temperature control valve 12 energized by a motor 11 from side to side to change the mixing temperature. Reference numeral 13 denotes a mixing section for hot water and water. After mixing, the hot water is discharged via a flow rate adjustment on-off valve 14, and the temperature thereof is determined by means for detecting the temperature of the mixed water (for example, a thermistor).
15, the flow rate is detected by the flow rate detection means 16, and the control means 18 controls the flow rate with the motor 11 so as to match the value of the setting means 17. The regulating on-off valve 14 is energized.

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, the size becomes larger and the pressure loss also increases, which poses a problem when a large flow rate is required. becomes. Furthermore, when changing the temperature, the temperature control valve 12 is energized by the motor, so the response is slow.

The present invention solves this conventional problem by directly driving the valve shaft with a variable bias means compared to a motor, and by superimposing an irregular AC signal on the drive signal, the temperature can be adjusted quickly and a stable mixed water flow can be achieved. The purpose is to provide warmth.

Means for Solving the Problems In order to solve the above problems, the hot water mixing device of the present invention includes a hot water flow path, a water flow path, a hot water side valve body and a water side valve that adjust the flow rates of the hot water flow path and the water flow path. a valve shaft that makes forces due to the outlet pressures of the hot water side valve body and the water side valve body oppose each other, variable bias means that applies a variable bias force to the valve shaft, and control means that controls the variable bias means. The control means includes AC signal generation means for superimposing an irregular AC signal on the drive signal of the variable bias means.

Effect With the above-described configuration, an AC signal is superimposed on the drive signal of the variable bias means to accelerate the temperature tli transition.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Note that FIG. 1 is a sectional view of the hot water mixing device, and the same parts as in FIG. 4 are given the same numbers.

Numeral 19 is a biasing means, and 20 is a variable biasing means that opposes the force of the biasing means 19 and applies a variable bias force. The variable bias means 20 includes a plunger 21 made of a magnetic material, and a waterproof and insulated coil 22 around the plunger 21, and the coil 22 is connected to the control means 18.
It is connected to the. The 11-section flow rate on-off valve 14 is driven by a flow rate adjustment on-off valve driving means 23 .

FIG. 2 shows an example of the control means 18. 24 is main control means, 25 is energization amount setting means, and 26 is AC signal generation means.

FIG. 3 shows an example of the output of the AC signal generating means.

Next, the operation of the configuration of the present invention will be explained.

When a current is applied to the coil 22 from the control means 18, the plunger 21 made of a magnetic material moves to the valve stem 8 according to Fleming's law.
imparts a bias force to. This pie skirt and biasing means 1
The automatic pressure regulating valve is balanced when the biasing forces 9 are balanced.

Therefore, by changing the current flowing through the coil 22, the balance point of the automatic pressure regulating valve 3 can be moved.

For example, when the current is small, the force of the biasing means 19 is stronger, so the water side valve body 6 opens more than the hot water side valve body 4, and the outlet temperature becomes lower.

When the current is increased, the plunger 21 is pushed out against the force of the urging means 19, and the hot water side valve body 4 begins to open, resulting in a high hot water temperature.

In this way, the control means 18 controls the mixed hot water temperature detection means 15.
By inputting the signal and the signal from the setting means 17, the current flowing through the coil 22 is adjusted so that the hot water temperature reaches the set temperature.

At this time, if the current flowing through the coil 22 is a direct current, it is difficult to quickly move the valve shaft 8 and adjust the temperature of the mixed water due to the hysteresis characteristics of the variable bias means 20 consisting of a magnetic circuit and the sliding resistance at the start of driving. .

Moreover, the current flowing through the coil 22 is simply a regular alternating current signal (
Even if FIG. 3(a)) is superimposed, the hysteresis characteristic of the variable bias means 20 consisting of a magnetic circuit and the sliding resistance at the start of driving are reduced, but resonance vibration of the valve shaft 8 due to regular AC signals is generated. Sometimes.

Therefore, in order to prevent the above phenomenon, the AC signal generating means 2
6 generates an irregular alternating current signal (eg, changing the period (FIG. 3(b)), changing the amplitude (FIG. 3(C)), etc.) according to a control signal from the main control means 24. This signal is sent to the energizing amount setting means 25, and an irregular alternating current signal is superimposed on the current flowing through the coil.

This reduces the hysteresis characteristic of the variable bias means 20 consisting of a magnetic circuit and the sliding resistance at the start of driving.
It is possible to prevent resonance vibration of the valve shaft 8 from occurring.

Furthermore, the operation when stopping the hot water supply will be explained.

A case will be described in which the flow rate detection means 16 is used as the hot water tap stop detection means. When the hot water supply is stopped by the setting means 17 or when the hot water supply is stopped due to a water outage, etc., the main control means 2
6 detects that the flow rate is decreasing based on a signal from the flow rate detection means 16. If the flow rate falls below a certain level, it becomes difficult to control the mixed water temperature to the set value, so the main control means 26
is the driving force (
sends a signal to stop the supply of current). As a result, the supply of driving force to the coil 22 is stopped after the hot water supply is stopped, so that the power consumption of the hot water mixing control device can be reduced. Furthermore, when the driving force to the coil 22 is stopped, the valve stem 8 is pushed by the biasing means 11, and the hot water side valve body 4 is almost fully closed. Even if the flow rate adjustment on-off valve 14 is opened due to a malfunction or the like, the outlet temperature remains higher than the set temperature. It is safe and will not cause damage.

In normal use, when the water pressure fluctuates, the automatic pressure regulating valve 3 operates as before, and if the pressure-receiving areas of the hot water side valve body 4, water side valve body 6, and piston 9 are made equal, the secondary pressure PH
2 and PO2 are maintained at a balance point by the urging means 19 and the variable bias means 20.

Furthermore, since the pressure regulating valve and the temperature regulating valve can be integrated into one, the size can be made smaller.

Effects of the Invention As described above, the hot water mixing control device of the present invention includes a vortex flow path and a water flow path, a hot water side valve body and a water side valve body that adjust the flow rates of the hot water flow path and the water flow path, and the hot water side valve. The control means comprises a valve shaft that makes forces due to the outlet pressures of the valve body and the water side valve body oppose each other, variable bias means that applies a variable bias force to the valve shaft, and control means that controls the variable bias means, and the control means Since the apparatus includes AC signal generating means for superimposing an irregular AC signal on the drive signal of the variable bias means, it has the following effects.

(1) By superimposing an alternating current signal on the current that drives the variable bias means, the hysteresis characteristic of the variable bias means consisting of a magnetic circuit and the sliding resistance at the start of driving can be reduced.

(2) By making the superimposed alternating current signals irregular, resonance vibration of the valve stem can be prevented from occurring.

[Brief explanation of drawings]

Figure 1 is a sectional view of a hot water mixing control device according to an embodiment of the present invention, the second figure is a control block diagram of the hot water mixing control device, and the third figure is an output characteristic diagram of the alternating current signal generating means of the hot water mixing control device. , FIG. 4 is a sectional view of a conventional hot water mixing control device. 1...Hot water flow path, 2...Water flow path, 4...
...Hot water side valve body, 6...Water side valve body, 8...
... Valve shaft, 18 ... Control means, 19 ...
...Biasing means, 20...Variable bias means. Name of agent: Patent attorney Shigetaka Awano Haka 1 person / ---
``One tank'' cry (, Shi & ♂ police, water 5 eight outside 4 - hot water ■ Masu rice - water purchase - 1ff body δ - valve stem 17 - general foot "P role π - variable hypes Hand diagram diagram ((Ln)

Claims (1)

[Claims] A hot water flow path and a water flow path, a hot water side valve body and a water side valve body that adjust the flow rates of the hot water flow path and the water side valve body, and forces caused by outlet pressures of the hot water side valve body and the water side valve body to be opposed to each other. a variable bias means that applies a variable bias force to the valve stem, and a control means that controls the variable bias means, and the control means applies an irregular alternating current signal to the drive signal of the variable bias means. A hot water mixing control device having an alternating current signal generating means that superimposes an alternating current signal.