JPS5922432Y2 - instant gas water heater - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of an instantaneous gas water heater.

When hot water is supplied using an instantaneous gas water heater, a large amount of hot water at a high temperature is required for bathing and washing, so a device with a large combustion capacity is required.

On the other hand, kitchens, sinks, and showers require a certain amount of hot water at a certain temperature, so when the water supply temperature is low, for example, a medium-sized combustion capacity is used in the winter, and when the water supply temperature is high, for example, a small combustion capacity is used in the summer. Each thing is necessary.

However, some conventional instantaneous gas water heaters allow you to adjust the combustion capacity from large to small, but the capacity adjustment is done manually, and there is only one hot water supply port, which requires a single hot water pipe to be connected to the hot water supply port. The hot water supply piping branches out at the tip to supply hot water to various uses.

Therefore, when using the instant gas water heater for bathing and laundry, the capacity of the instant gas water heater must be set to high, and when used for other purposes, the combustion capacity must be manually switched to medium or low. Ta.

Therefore, the combustion capacity has to be changed several times during the day, and it is very inconvenient because it is necessary to change the combustion capacity each time you reheat the bath or take a shower. .

The present invention was made in order to eliminate the above-mentioned drawbacks, and the hot water supply circuit connected to the heat exchanger outlet is divided into the first hot water supply circuit and the second hot water supply circuit.
In addition to the hot water supply circuit, the combustion circuit is also divided into a first combustor and a second combustor.
The first hot water supply circuit is divided into combustors, and the first hot water supply circuit uses a first combustor with adjustable combustion capacity when hot water is being supplied, and the first hot water supply circuit is provided with a switching valve mechanism, and the switching valve mechanism is controlled according to the hot water supply of the second hot water supply circuit. The first combustor is activated to automatically stop the hot water supply to the first hot water supply circuit, and the first combustor and the second combustor are simultaneously combusted, and the combustion capacity of the first combustor is related to the adjustment amount of the gas amount adjustment valve. It was designed to be the maximum possible.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a water supply circuit, 2 is a diaphragm body that incorporates a diaphragm 3 and a valve 3' provided in the water supply circuit 1, and 4 and 5 are a water supply circuit 1 downstream of the diaphragm body 2.
The orifice 5 is communicated with the diaphragm body 2 through a flow rate regulating valve and a differential pressure generating orifice provided in the diaphragm body 2 .

6 is a heat exchanger connected to the water supply circuit 1, 7 is a heat exchanger 6
A first hot water supply circuit connected to the outlet, 8 a second hot water supply circuit connected in parallel to the first hot water supply circuit 7, 9 and 10 faucet and shower valves provided at the tip of the first hot water supply circuit 7;
11 is an orifice for generating a differential pressure provided in the second hot water supply circuit 8; 12 is a faucet provided at the tip of the second hot water supply circuit 8;
Reference numeral 3 denotes a switching valve mechanism provided in the first hot water supply circuit 7, which communicates with the second hot water supply circuit 8 and the orifice 11, and which is provided in the diaphragm body 14 containing the diaphragm 15 and the first hot water supply circuit 7, and is connected to the rod 17. It consists of a switching valve 16 connected to the diaphragm 15 via a switch, a switch 18 that is turned on and off by the movement of the rod 17, and a return spring 19 that returns the diaphragm 15 and the switching valve 16 to their original positions.

20 is a main fuel supply path, and this supply path 20 is connected to a gas governor 2.
1. A gas valve 23 connected to the diaphragm 3 of the water supply circuit 1 via a gas cock 22 and a rod 24 is sequentially provided.

29 is a first combustor that heats the heat exchanger 7;
This includes a fuel supply path 25 having a gas amount adjustment valve 26.
a bypass passage 25 having a solenoid valve 28 and connected to the fuel supply passage 25a in parallel with the gas adjustment valve 26;
It is connected to the main fuel supply path 20 via C.

30 is a second combustor, and a fuel supply passage 25 having a solenoid valve 27
It is connected to the main fuel supply path 20 via b.

The electromagnetic valves 27 and 28 are the switches 18 of the switching valve mechanism 13.
activated by

31 is a pilot burner connected to the gas cock 22.

Next, the operation of this embodiment having the above configuration will be explained.

The gas cock 22 is opened to supply fuel gas to the pilot burner 31, and at the same time, the pilot burner 31 is ignited by an appropriate means.

Then, when the faucet 9 at the tip of the first hot water supply circuit 7 or the shower valve 10 is opened, water flows through the water supply circuit 1 and the heat exchanger 6.

In this case, the diaphragm 3 in the diaphragm body 2 detects the water flow in the water supply circuit 1 and operates, and this operation opens the gas valve 23 via the rod 24, so that the combustion gas passes through the gas amount adjustment valve 26 and is activated. The fuel is supplied to the combustor 29, ignited by the pilot burner 31, and combusted.

This combustion causes the first combustor 29 to heat the heat exchanger 6, so that the water flowing through the heat exchanger 6 is heated.

If the faucet 9 or the shower valve 10 is fully opened, the same amount of water will be supplied, so if the supplied water temperature and combustion amount are constant, the same hot water temperature will be obtained.

The flow rate adjustment valve 4 adjusts the amount of hot water required by the first hot water supply circuit 7.
the first combustor 2 by the gas amount adjustment valve 26.
The hot water temperature can be adjusted by manually selecting the combustion capacity in step 9 from large to small. The amount can be adjusted, and the combustion capacity can be adjusted several times a year using the gas amount adjustment valve 26.

Next, the faucet 9 of the first hot water supply circuit 7 or the shower valve 1
0 is closed to stop hot water supply, the diaphragm 3 detects that the water flow in the water supply circuit 1 has stopped, and the gas valve 23 is closed, so that combustion in the first combustor 29 is stopped.

Then, when the faucet 12 of the second hot water supply circuit 8 is opened, the first combustor 29 burns and heats the heat exchanger 6 in the same manner as described above.

On the other hand, the diaphragm 15 of the switching valve mechanism 13 detects the water flow of the second hot water supply circuit 8, and the rod 17 resists the force of the spring 19.
Since the switching valve 16 is moved to the right, the switching valve 16 is closed and hot water supply to the first hot water supply circuit 7 is stopped.

At the same time, the switch 18 is turned on by the movement of the rod 17, and the solenoid valves 27 and 28 are excited, so that the fuel gas is supplied to the second combustor 30 and combusted, and is also supplied to the first combustor 29 and combusted. .

Therefore, the first combustor 29 exhibits its maximum combustion capacity regardless of the adjustment amount of the gas amount adjustment valve 26.

The heat exchanger 6 is heated by the combustion in the first and second combustors 29, 30, so when hot water is supplied to the second hot water supply circuit 8, a large amount of hot water at a high temperature suitable for bathing, laundry, etc. can be supplied. .

When a particularly high temperature is required in the second hot water supply circuit 8, such as when reheating a bath, the opening degree of the faucet 12 may be reduced to reduce the amount of hot water dispensed.

Furthermore, when hot water is being supplied from the second hot water supply circuit 8, hot water is not supplied to the first hot water supply circuit 7 due to the action of the switching valve, so even if the faucet 9 or the shower valve 10 of the first hot water supply circuit 7 is opened, there is no risk of hot water being dispensed. It's safe.

When the faucet 12 of the second hot water supply circuit 8 is closed and hot water is stopped, the diaphragm 15 detects the stoppage of water flow in the second hot water supply circuit and is activated, so the switch 18 is turned off and the solenoid valve 27
．． 28 is demagnetized, the supply of fuel gas to the second combustor 30 is stopped.

On the other hand, the switching valve 16 is opened, but the gas valve 23 is closed in the same way as when the hot water supply to the first hot water supply circuit 7 is stopped, so the supply of fuel gas to the first combustor 29 is stopped.

As explained above, according to the present invention, the combustion capacity can be arbitrarily selected from high to low when hot water is supplied by the first hot water supply circuit, and the second combustor burns simultaneously when hot water is supplied by the second hot water supply circuit. 1 combustor exhibits the maximum combustion capacity. Therefore, it is possible to easily adjust the amount and temperature of hot water supply to suit each application, eliminating the inconvenience of switching the combustion capacity as in the past. Energy saving can be achieved.

Furthermore, since the supply of hot water to the first hot water supply circuit is stopped while the second hot water supply circuit is supplying hot water, there is no risk of hot water being dispensed and it is safe.

In addition, by incorporating the switching valve mechanism and combustor of the present invention into the heat exchanger of a conventional instantaneous gas water heater, the advantage is that hot water can be easily supplied in the amount and temperature appropriate for each application, making it easier to use. There is.

[Brief explanation of the drawing]

The drawing is a system diagram showing an embodiment of the instantaneous gas water heater of the present invention. 1... Water supply circuit, 3, 15... Diaphragm, 6... Heat exchanger, 7, 8...
1st. Second hot water supply circuit, switching valve mechanism, 25
a, 25 b... Combustion supply circuit, 25 C
...Bypass circuit, 26...Gas amount adjustment valve, 29.30...1st. Second combustor.

Claims (1)

[Scope of utility model registration request] The hot water supply circuit connected to the heat exchanger outlet is divided into a first hot water supply circuit and a second hot water supply circuit, and the combustor is also divided into a first hot water supply circuit and a second hot water supply circuit.
The first hot water supply circuit is divided into combustors, and the first hot water supply circuit uses a first combustor with adjustable combustion capacity when hot water is being supplied, and the first hot water supply circuit is provided with a switching valve mechanism, and the switching valve mechanism is set according to the hot water supply of the second hot water supply circuit. The first combustor is operated to automatically stop the hot water supply to the first hot water supply circuit, and the first combustor and the second combustor are simultaneously combusted, and the combustion capacity of the first combustor is related to the adjustment amount of the gas amount adjustment valve. An instantaneous gas water heater characterized by being large in size.