JP3326923B2 - Hot water supply control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to hot water supply control of an instantaneous hot water supply device for adjusting the amount of water in a hot water supply device.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional hot water supply control apparatus of this type includes a heating path 2 provided with a heat exchanger 1, a bypass path 3 bypassing the heat exchanger 1, and a bypass path 3. The flow control valve 4 and the check valve 6 are provided, and by controlling the opening degree of the flow control valve 4, the mixing degree of the hot water from the heating path 2 and the water from the bypass path 3 is changed to set a predetermined mixing temperature. The temperature was at the hot water. Also, in order to regulate the total amount of water to the water heater, a water flow valve is used to regulate the amount of water flowing beyond the heating capacity, and the flow control valve 4 and the water flow valve are driven by a motor 5 to drive a valve body. Such a configuration is generally used.

Further, a valve is driven by a solenoid as a water amount control valve, and an AC signal is superimposed on the solenoid to reduce friction of a sliding portion.

[0004]

However, the motor valve device of the conventional hot water supply control device has a low speed and poor control performance of the hot water temperature. In the solenoid type, the valve body moves due to a change in the water amount or pressure, and the water amount is not sufficient. Not only is it stable,
Vibration sometimes occurred where the pressure was high.

An object of the present invention is to solve the above-mentioned problems and to provide a safe and stable hot water supply at low cost.

[0006]

In order to achieve the above object, a hot water supply control device according to the present invention has the following configuration.

(1) A heat exchanger, a bypass which bypasses the heat exchanger, a bypass valve provided in the bypass, an operating force generating means for driving the bypass valve, and the operating force generating means AC signal generating means for superimposing an alternating operation force on the bypass valve, and applying a signal of the AC signal generating means when the operation amount to the bypass valve changes , and operating the bypass valve
A start / stop unit for stopping the signal of the AC signal generation unit at a predetermined time is provided.

(2) A water quantity valve for adjusting the flow rate, an operating force generating means for driving the water quantity valve, an AC signal generating means for superimposing an alternating operating force on the operating force generating means, and The signal of the AC signal generating means is applied when the operation amount changes, and the AC signal is generated when the operation amount of the water amount valve is constant.
It is provided with a start / stop means for stopping the signal of the generation means .

[0009]

According to the present invention, the valve is moved by increasing the frictional force of the valve without applying an alternating operation force while the movement of the valve is stopped.
Movement and provide alternating operation force while the valve is moving.
The valve is driven by reducing the frictional force of the valve .

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention;

In FIG. 1, an inlet channel 11 and a heating channel 12 are connected in series via a heat exchanger 10, and water is passed through the inlet channel 1.
1, heat exchanger 10, and heating path 12 flow in that order. The bypass 13 bypassing the heat exchanger 11 is connected to a junction 14 of the water inlet 11 and a junction 15 at the tip of the heating path 12. At the junction 15, the flows of the heating path 12 and the bypass 13 are joined, and the hot water is discharged. It flows to road 16. Reference numeral 17 denotes a bypass valve provided in the middle of the bypass passage 13, which adjusts the degree of opening of the passage of the bypass passage based on an open / close signal. Reference numeral 18 denotes a tapping water detecting means provided downstream of the junction 15 and includes a sensor such as a thermistor, and detects a mixing temperature of the heating path 12 and the bypass path 13. 19 is a heating detecting means provided in the heating path 12 for detecting the outlet temperature of the heat exchanger 10. Reference numeral 20 denotes a water supply detecting means provided upstream of the branch point 14, and detects a water supply temperature. Reference numeral 21 denotes a water amount detecting means provided in the water inlet channel 11 for detecting the amount of water to the heat exchanger 10. Reference numeral 22 denotes a temperature setting means for arbitrarily setting a tapping temperature of the tapping water from the tapping path 16, 23 denotes a hot water supply controller, and the tapping detection means 18, the heating detection means 19, the water supply detection means 20, and the water amount detection means 21. The opening degree of the bypass valve 17 is controlled by the operating force generating means 24 via the AC signal generating means 23a in accordance with the detected values of
The fuel amount to the burner 25 is controlled by the opening of the proportional valve 26 so that the deviation becomes zero in accordance with the output deviation between the burner 25 and the preset temperature. Reference numeral 23b denotes a start / stop unit that starts / stops a signal from the AC signal generation unit 23b.

The bypass valve 17 and the operating force generating means 24 will be described with reference to FIG. The bypass valve 17 has an inflow port 28 and an outflow port 29 in a body 27, and a valve port 27a.
And the valve body 30 form a valve. A diaphragm 31 having substantially the same effective pressure receiving area as the valve port 27a and a communication hole 30a provided in the valve body 30 balance the fluid force acting on the valve body 30. The operating force generating means 24 is a coil 32
The magnetic body 36 integrated with the valve body 30 is attracted by a magnetic circuit composed of the yokes 33 and 34, the iron core 35, and the magnetic body 36, and the valve body 3 resists the force of the spring 37.
The opening degree of 0 is controlled by the current value of the coil 32. 38
Seals the water with a septum.

Next, the operation will be described. Hot water supply controller 2
3 compares the signal between the setting means 20 and the hot water detecting means 18 and, based on the deviation, the coil 32 of the operating force generating means 24.
Adjust the current of For example, if the tapping temperature is higher than the set temperature, the coil current is increased and the valve 30 is opened to open the bypass passage 1.
Increase the amount of water in step 3 to lower the temperature of the hot water. When the coil current is changed as described above, the alternating current signal is superimposed by the alternating signal generating means 23a by the start / stop means 23b, and the coil 32 is energized as shown in FIG. As a result, the variable operation force generating means 24 has a small alternating operation force (dither).
Is generated, and minute vibration is given to the valve body 30, and as a result, the frictional force is reduced. When the set temperature and the tapping temperature become substantially equal, the coil current maintains a constant value, and the valve body 30 does not change its position. As described above, when the coil current is constant, the starting / stopping means 23b stops the superposition of the AC signal generating means 23a, and the alternating operation force is not applied as shown in FIG. The position cannot be changed by the fluctuation.

FIG. 4 shows an embodiment corresponding to claim 2, in which the total amount of water is reduced by the opening of the bypass valve 17 by means of a water amount valve 39 provided in the tapping path 16 and operating force generating means for driving the water amount valve. And is controlled by a signal from the water amount detecting means 21. Water quantity valve 39 and operating force generating means 40
Are the same as those shown in FIG. In this case, as in the case of FIG. 1, the signal of the AC generation means is superimposed only when the opening of the water quantity valve is changed. This water amount valve 39 may be provided in the heating path 12.

The magnitude and frequency of the waveform of the AC signal generating means 23a are preset according to the magnitude of the sliding frictional force, but can be changed according to the accumulated use time, temperature, or valve opening. Further, as the AC signal generating means 23a,
There are a method using a transmission circuit and a method using a microcomputer program.

[0016]

As described above, according to the hot water supply control device of the present invention, the following effects can be obtained.

(1) A heat exchanger, a bypass which bypasses the heat exchanger, a bypass valve provided in the bypass, an operating force generating means for driving the bypass valve, and the operating force generating means AC signal generating means for superimposing an alternating operation force on the water supply valve, and applying a signal of the AC signal generating means when the operation amount to the bypass valve changes , so that the operation amount to the water amount valve is constant.
Sometimes, the starting and stopping means for stopping the signal of the AC signal generating means is provided, so that when the operation amount is changed, the sliding friction force is reduced, the controllability is good, and the hot water temperature is quickly stabilized , and
When the operation amount is constant, the friction force is large, so the valve
Since the position is fixed without change, the mixing ratio is
There is no fluctuation of the hot water temperature.

(2) A water quantity valve for adjusting the flow rate, an operating force generating means for driving the water quantity valve, an AC signal generating means for superimposing an alternating operating force on the operating force generating means, and The signal of the AC signal generating means is applied when the operation amount changes, and the AC signal is generated when the operation amount of the water amount valve is constant.
Since there is a start / stop means to stop the signal of the generation means,
When changing the amount, the frictional force becomes smaller,
It is possible to set an accurate amount of water with better accuracy and less error. Again
When the production is constant, the frictional force is large,
There is no change in the amount of water generated due to the valve position fluctuating,
No vibration occurs.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot water supply control device according to an embodiment of the present invention.

FIG. 2 is a sectional view of a bypass valve of the device.

FIG. 3 is a characteristic diagram showing a change in current of an operating force generating means of the device.

FIG. 4 is a configuration diagram of a hot water supply control device according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional hot water supply control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat exchanger 13 Bypass path 17 Bypass valve 23a AC signal generating means 23b Starting and stopping means 24 Operating force generating means 39 Water quantity valve 40 Operating force generating means

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-172395 (JP, A) JP-A-1-199079 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 1/10 302

Claims (2)

(57) [Claims] 1. A heat exchanger, a bypass which bypasses the heat exchanger, a bypass valve provided in the bypass,
Operating force generating means for driving the bypass valve, AC signal generating means for superimposing an alternating operating force on the operating force generating means, and applying a signal of the AC signal generating means when the amount of operation to the bypass valve changes , Constant operation of the bypass valve
A hot water supply control device comprising a start / stop unit for stopping a signal of the AC signal generation unit at the time. 2. A water quantity valve for adjusting a flow rate of water, an operating force generating means for driving the water quantity valve, an AC signal generating means for superimposing an alternating operating force on the operating force generating means, A signal of the AC signal generating means is provided when the operation amount changes, and the AC signal generation is performed when the operation amount of the water amount valve is constant.
A hot water supply control device having a start / stop means for stopping a signal of the means.