JPS58138929A - Hot water feeding device - Google Patents

Abstract

PURPOSE:To enable the maintaining of a required temperature of hot water without adjusting a tap by a method wherein a heating loss from the hot water storing tank is decreased and at the same time a high hot water can be obtained in a short period of time when the hot water is diminished. CONSTITUTION:A cistern 9, hot water storing tank 3 and source of heat 6 are separately arranged, and a circuit from an outlet port 12 at the lower part of the cistern 9 to the inlet port 13 above the hot water storing tank 3 is provided with a low hot water pipe 15, three-way valve 16, source of heat 6, hot water pipe A17, mixing valve 18, pump 19, hot water pipe B20 and solenoid valve 21. Further, the outlet port 14 at the lower part of the hot water storing tank 3 is communicated with the three-way valve 16 through the high temperature hot water pipe C22, and both the low hot water pipe 15 and the mixing valve 18 are connected by a bypass pipe 23. The hot water output pipe 2 is taken out from the hot water pipe 20 between the pump 19 and the solenoid valve 21. When the operation is started without any water (or hot water) in the hot water tank 3, the pump 19 is started to operate, and at the same time a solenoid valve 21 and a burner 4 at the source of heat 6 are turned on with a signal from the water level switch 3a, and the water is heated through the heat exchanger 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water storage type water heater in which a distiller, a hot water storage tank, and a heat source are separated.

A conventional hot water storage type water heater is constructed as shown in FIG. 4A. That is, a hot water storage tank 3 having a water supply pipe 1 and a hot water outlet pipe 2
and a heat source section 6 consisting of a burner 4 and a heat exchanger 6 are connected through an inlet pipe 7 and an outlet pipe 8. Generally, the input capacity of the heat source section 6 is low and the amount of hot water stored is large.

Therefore, the operation sequence is such that the required amount of boiling time is long, the ignition is started before the time period when a large amount of hot water is used, and a large amount (e.g., 2oool) of high-temperature water (e.g., SO'C) is boiled. By automatically reheating the hot water depending on the usage, a large amount of high-temperature hot water is always stored.

In this case, there is a lot of heat radiation loss from hot water storage M3 (200~3
00 kcal/h), so although it has the advantage of being able to obtain a large amount of hot water at any time, it is not economical. In addition, because the heating capacity of the heat source is low and the hot water storage tank has a large capacity, if for some reason the hot water is used up in a short period of time and the hot water runs out, it will take a long time to boil it again. There are drawbacks to doing so. Furthermore, there are variations depending on the purpose of heating water during hot water supply. Therefore, there is a drawback that the water and hot water must be constantly adjusted to the required temperature at the faucet.

The invention was designed to eliminate these conventional drawbacks, and was able to reduce heat loss from the hot water storage tank, obtain high-temperature hot water in a short time even when the hot water runs out, and adjust the required hot water temperature at the faucet. The purpose is to make it possible without.

In order to achieve this object, the present invention has a configuration in which the distiller, hot water storage tank, and heat source are separated, and a low-temperature water pipe, a three-way valve, and a , a heat source, a mixing valve pump, and a solenoid valve are arranged in this order, and the other side of the three-way valve is connected to the outlet at the bottom of the hot water storage tank, and a bypass pipe is installed between the downstream side of the three-way valve and the mixing valve, and a bypass pipe is installed between the pump and the solenoid valve. Even if the hot water tank is equipped with a hot water outlet pipe and the hot water storage tank is equipped with multiple water level switches to control the amount of hot water stored, this configuration allows the solenoid valve to be controlled in conjunction with the water level switch installed in the hot water storage tank. and store a large amount of hot water (for example, 12
07J) and a small amount (for example, switch to +o7ri. This means that a small amount of hot water is stored during the time when the hot water supply load is low, and a large amount is stored during the time when the hot water supply load is high. A small amount is stored during the time from late night to early morning. By storing hot water, heat radiation loss can be reduced.

Furthermore, by making it possible to store a small amount of hot water, even if the hot water runs out, the amount of reheating is small, so even if the input capacity of the heat source is low, hot water can be obtained in a short time as shown in 3 [JB]. can. In addition, as shown in Figure 2, the water temperature in the hot water storage tank is about 70'C (for example, 70'C), but there is a built-in mixing valve that mixes the water from the bypass pipe and the high-temperature hot water in the hot water storage tank. This allows the necessary temperature of water to be delivered to the faucet. .

Hereinafter, one embodiment of the invention will be described based on the drawings. In the drawings, parts that are the same as those in FIG. 4A, which is a conventional example, are given the same numbers.

In the figure, a distern 9 is connected to a ball tap 10 directly connected to a water supply pipe 1. Entrance section 11. The outlet section 12 is also configured. The hot water storage tank 3 has a water level switch sa, '3 on the street and almost at the bottom.
b, and has an inlet part 13 at the upper part and an outlet part 14 at the lower part.

A low-temperature water pipe 16. Three-way valve 16. Heat source part 6. High temperature water pipe A17. Mixing valve 18, pop/pu 19. A high temperature water pipe B20 and a solenoid valve 21 are provided. Furthermore, the outlet part 14 and the three-way valve 16 at the bottom of the hot water storage tank 3 are connected to the high temperature water pipe C22.
At the same time, the low temperature water pipe 15 and the mixing valve 18 are connected by a bypass pipe 23.

The hot water pipe 2 is a high temperature water pipe 2o between the pump 19 and the solenoid valve 21.
I'm taking it out more. 24 is a flow rate switch, and 25 is a temperature detection thermistor.

The operation of the above configuration will be explained below by classifying the cases of large amount hot water storage, small amount hot water storage, and circulation heating.

(1) When storing a large amount of hot water When the operation is started with no water (or hot water) in the hot water storage tank 3, the pump 19 is activated and at the same time the electromagnetic valve 21 and the burner 4 of the heat source section 6 are activated by a signal from the water level switch 3a.
is turned on and heated by the heat exchanger 5. The temperature of hot water stored in the hot water storage N3 can be controlled according to the temperature setting of the mixing valve 18.

After that, when the water temperature reaches the level of the water level switch 3& on the road, the burner 4 is stopped and the heating is finished, and the electromagnetic 61.

Valve 21. Pump 19 is also turned off.

When the hot water tap pipe 2 is opened in this state, the three-way valve circuit is switched in response to a signal from the flow rate switch 24, and high temperature hot water is tapped from the outlet portion 14 at the bottom of the hot water storage tank 3 by the pump 19.

In this case, if the temperature of the hot water in the hot water storage tank 3 is higher than the temperature detection thermistor, the burner 4 will remain extinguished; on the other hand, if you want to obtain high-temperature hot water, you can increase the set temperature of the temperature detection thermistor 26 and the heat source It is also possible to dispense hot water while it is being heated at step 6.

Furthermore, although the mixing valve 18 is controlled both when sending high-temperature hot water to the hot water storage tank 3 and when hot water is being supplied, priority is given to the case of the hot water storage tank 3 as a circuit.

(2) In the case of storing a small amount of hot water This is for when the hot water stored in a large amount is used up or when only a small amount of hot water is to be stored.It is possible to store a small amount of hot water by controlling the water level switch 3b at the bottom, and the operation is as follows. It is the same as storing a large amount of hot water.

(3) In the case of circulating heating, the amount of hot water in the hot water storage tank 3 is either a small amount or a large amount. In this case, the hot water was stored for a long time (
Depending on the case, the temperature of the hot water drops after not using it for more than a day.

When operated manually, electric power is 21. While the 30,000 valve 16 and the pump 19 are activated, the burner 4 is turned on under the control of the temperature detection thermistor 25, and 3 yen of hot water in the hot water storage tank is circulated and reheated to a predetermined hot water temperature.

In the above-mentioned water heater, a certain amount of hot water is stored in the hot water storage tank 3, and the amount of stored hot water is sterilized, and by being able to reheat it, it is possible to store hot water according to the hot water supply load. Heat radiation loss is significantly reduced (200ka
aβA) Yes. 1. As shown in FIG. 3B, hot water can be obtained in a short time, which improves usability, and it is also convenient because the water temperature in the hot water storage tank 3 can be re-boiled.

Moreover, since the high temperature hot water in the hot water storage tank 3 can be further heated when hot water is dispensed, the capacity of the hot water storage can be reduced. It's extremely convenient because you can get the desired hot water temperature without having to operate the faucet.

As described above, according to the invention, it is a water heater that separates the sister/hot water storage tank and heat source, and the influence of water pressure on the hot water storage tank can be greatly reduced, and the cross section can be made into a rectangular shape, making it slim. It is possible to save space. Furthermore, as shown in Figure 3A, it is a system that stores a foot of high-temperature hot water, and the full capacity of the hot water storage tank can be used as the effective amount of hot water (conventionally, there is 10 to 3071 dead water), which has excellent effects. can be obtained.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of a water heater according to an embodiment of the invention, Fig. 2 is a hot water temperature characteristic diagram of the same equipment, and Figs. 3 A and B are hot water output and hot water temperature characteristics diagrams of the noninvention and conventional water heaters. , the fourth prisoner is a configuration diagram of a conventional hot water supply device, and FIG. 4B is a hot water temperature characteristic diagram of the same device. 3...Hot water tank, 3a...Upper water level switch, 3b...Lower water level switch, 6...
・・Heat source part, 9・・・・ Distance, 16・・・・
...Low temperature water pipe, 16...Three-way valve, 18...
...Mixing valve, 19...Pump, 20...
・High temperature water pipe B121...Solenoid valve, 22...
・・High temperature water pipe C123・・・・Bypass pipe, 24・
...Flow rate switch, 25...Temperature detection thermistor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
11th period (Button No. 4, 7 IIl - Unexplored

Claims (1)

[Scope of Claims] A hot water storage tank and a heat source section each containing a distern and a plurality of water level switches are provided separately, and a low-temperature water pipe is included in a circuit extending from an outlet at the lower part of the distern to an inlet at the upper part of the hot water tank. Three-way valve, heat source. A mixing valve, a pump, and a solenoid valve are arranged in this order, and the pond side of the three-way valve is connected to the outlet of the lower part of the hot water storage tank, and a bypass pipe is provided between the downstream side of the three-way valve and the mixing valve, and... A water heater that has a hot water outlet pipe between a pump and a solenoid valve.