JPH0942492A - Hot water supply temperature adjusting device for hot water supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water supply temperature adjusting device for a hot water supply device which can perform smooth outflow temperature controlling due to smooth flow rate controlling irrespective of pressure inside a water supply pipe passage. SOLUTION: A water supply pipe passage 11 through which water is supplied is branched into two. Hot water passing through one branched pipe passage 12 is mixed with water passing through the other branched pipe passage 13, and fed to a hot water outflow pipe passage 14. In such a hot water supply temperature adjusting device for a hot water supply device, proportional solenoid valves l5, 16 are arranged respectively on the branched pipe passages 12, 13 for controlling flow rates of the hot water and water passing through the two branched pipe passages 12, 13. A constant differential pressure valve 18 is arranged for keeping difference between the pressure inside the water supply pipe passage 11 and the pressure inside the hot water outflow pipe passage 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply temperature adjusting device for a hot water supply device.

[0002]

2. Description of the Related Art Generally, in a hot water supply device, a water supply pipe to which water is sent is branched into two, and hot water produced by heating one of the branch pipes and the inside of the other branch pipe. The water that has passed through is mixed and sent out to the hot water outlet pipe.

The proportional solenoid valve provided in each of the two branch pipes controls the flow rate of water and hot water passing through the two branch pipes to adjust the hot water temperature.

[0004]

However, in the conventional device as described above, the pressure in the water supply line is, for example, 10 kg / cm ²
If it becomes too high, the valve will move only slightly and the differential pressure across the valve will fluctuate significantly, causing the valve to move abruptly, so smooth flow rate control (that is, hot water temperature control) will not be performed. There was a flaw.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a hot water supply temperature adjusting device for a hot water supply device capable of performing a smooth hot water discharge temperature control by a smooth flow rate control regardless of the pressure level in the water supply pipe line.

[0006]

In order to achieve the above-mentioned object, a hot water supply temperature adjusting device of a hot water supply device of the present invention divides a water supply pipe line to which water is sent into two, and the branch pipe line. In the hot water supply temperature adjusting device of the hot water supply device, which mixes the hot water produced by heating one of the hot water and the water passing through the other branch pipe, and sends the mixed hot water to the hot water discharge pipe. A proportional solenoid valve for controlling the flow rate of water and hot water passing through is provided in each of the branch pipelines, and the pressure difference between the pressure in the water supply pipeline and the pressure in the hot water pipeline is made constant. It is characterized in that a constant differential pressure valve is provided for keeping the same.

[0007]

Embodiments will be described with reference to the drawings. In FIG. 1, 1 is a heat exchanger for heating the water in the pipe with a constant amount of heat, and 10 is a hot water supply temperature adjusting device for adjusting the hot water supply temperature.

Water supply line 11 to which pressurized water is sent
Is branched into two in the hot water supply temperature adjusting device 10, and one of the branch pipes (heating pipes) 12 is the heat exchanger 1
And the other branch pipeline (bypass pipeline) 13 is introduced into
It is arranged so as to merge with the outlet of the heating pipe line 12 coming out of the heat exchanger 1. Then, the merging conduit (hot water outlet conduit) 14 is led out from the hot water supply temperature adjusting device 10 toward the hot water supply destination.

Near the outlet of the heating pipe 12, the heating pipe 1
A first proportional solenoid valve 15 for controlling the flow rate of hot water flowing into the hot water outlet pipe 14 from 2 is inserted and connected. A second proportional solenoid valve 16 for controlling the flow rate of water flowing from the bypass pipe 13 into the hot water outlet pipe 14 is inserted in the middle of the bypass pipe 13.

Both of the proportional solenoid valves 15 and 16 perform flow rate control in proportion to the current value supplied to each electromagnetic coil, and are controlled in conjunction with each other by a control circuit (not shown).

A flow meter 17 is connected near the inlet of the heating pipe line 12, and the output signal thereof is sent to a control circuit (not shown) to control both proportional solenoid valves 15 and 16. Used for.

A constant differential pressure valve 18 is connected in the middle of the hot water supply pipe line 14 so as to keep the differential pressure between the pressure in the water supply pipe line 11 and the pressure in the hot water supply pipe line 14 at a predetermined constant value. There is.
Reference numeral 19 is a communication pipe for transmitting the pressure in the water supply pipe 11 to the constant differential pressure valve 18.

Therefore, even if the water pressure in the water supply pipe 11 fluctuates, the water pressure in the hot water discharge pipe 14 also changes accordingly, so that the inlet side and the outlet side of the first and second proportional solenoid valves 15 and 16 respectively. The pressure difference on the side is maintained substantially constant, and the flow rate is smoothly controlled.

FIG. 2 more specifically exemplifies the configuration of the embodiment shown in FIG. 1, and the description of the parts denoted by the same reference numerals as in FIG. 1 will be omitted. First and second
In the proportional solenoid valves 15 and 16, the openings of the inlet side conduit and the outlet side conduit are respectively arranged toward one surface of the pressure actuated valve a which is displaced by the difference in pressure applied to both surfaces, A pressure adjusting chamber b is formed on the other surface side.

The pressure-operated valve a has a first pilot hole c for communicating the inlet-side conduit with the pressure-regulating chamber b.
And a second pilot hole d for communicating the outlet side conduit with the pressure adjusting chamber b are formed, and the first and second pilot holes c are formed by relative displacement with the pressure actuated valve a. , D
An electromagnetically driven pilot valve element e for opening and closing is provided. f is an electromagnetic coil.

As a result, the first pilot hole c and the second pilot hole d are opened and closed by the relative displacement of the pressure actuated valve a and the electromagnetically driven pilot valve body e, and smooth flow rate control is achieved. Done.

The flow meter 17 is of a type in which a magnetic detector (not shown) detects a change in magnetic field caused by rotation of a rotor g containing a magnetic material arranged in the water supply conduit 11. .

In the constant differential pressure valve 18, the diaphragm h
The pressure in the water supply pipe line 11 is applied to one surface, and the pressure in the hot water supply pipe line 14 is applied to the other surface.
Since the urging force of is applied to the diaphragm h from the hot water outlet pipe 14 side, the pressure difference between the internal pressure of the water supply pipe 11 and the internal pressure of the hot water outlet pipe 14 is equal to the pressure of the urging force of the compression coil spring i (for example, 1kg / cm ² ) is maintained.

FIG. 3 shows a second embodiment of the present invention, in which a constant differential pressure valve 18 is connected in the middle of the water supply conduit 11, and a flow meter 17 is inserted and connected to the water supply conduit 11. Is. Reference numeral 20 is a communication pipe for transmitting the pressure in the hot water outlet pipe 14 to the constant differential pressure valve 18. As described above, the concrete piping configuration can take various embodiments.

[0020]

According to the present invention, even if the water pressure in the water supply pipe fluctuates, the differential pressure between the pressure in the water supply pipe and the pressure in the hot water supply pipe is kept constant by the constant differential pressure valve. Therefore, regardless of the pressure level in the water supply pipe, smooth flow rate control is performed in each proportional solenoid valve, and accurate and smooth hot water outlet temperature control can be easily performed.

[Brief description of drawings]

FIG. 1 is a piping diagram of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a specific configuration example of the first embodiment of the present invention.

FIG. 3 is a piping diagram of a second embodiment of the present invention.

[Explanation of symbols]

 1 Heat Exchanger 11 Water Supply Pipeline 12 Heating Pipeline 13 Bypass Pipeline 14 Hot Water Pipeline 15 Proportional Solenoid Valve 16 Proportional Solenoid Valve 18 Constant Differential Pressure Valve

Claims (1)

[Claims] 1. A water supply pipe to which water is sent is branched into two, and hot water produced by heating one of the branch pipes and water passing through the other branch pipe are mixed. In the hot water supply temperature adjusting device of the hot water supply device which is configured to send the hot water to the hot water outlet pipe, a proportional solenoid valve for controlling the flow rate of water and hot water passing through the two branch pipes is provided in each of the branch pipes. A hot water supply temperature adjusting device for a hot water supply device, which is provided with a constant differential pressure valve for maintaining a constant pressure difference between the pressure in the water supply pipe and the pressure in the hot water supply pipe.