JP2002156159A - Hot water supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water supply apparatus that is constituted to omit the circulating pump of a water pipeline which connects a heat storage tank to a heat exchanger while the maintenance, inspection, etc., of the heat exchanger is made to be easily executable by constituting the heat storage tank and heat exchanger in different bodies. SOLUTION: This hot water supply apparatus is composed of the heat exchanger 2 used for heating water A and the heat storage tank 1 used for storing the water A. This apparatus is constituted to circulate and heat the water A between the tank 1 and heat exchanger 2 by utilizing the natural convection generated when the water A is heated in the exchanger 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a hot water supply device,
In particular, the heat exchanger for heating the water and the heat storage tank for storing the heated water are configured separately, and the water in the heat storage tank is connected to the heat exchanger without using a circulation pump. Circulating between,
The present invention relates to a hot water supply device that is heated.

[0002]

2. Description of the Related Art Conventionally, as a hot water supply device used in homes and business establishments, an electric heater and a burner for burning fuel such as gas or oil are disposed in a heat storage tank, and water stored in the heat storage tank is used. A method of directly heating and storing hot water is widely used.

[0003] This type of hot water supply system uses fuel such as electricity, gas or petroleum as an energy source. In recent years, from the viewpoint of effective use of energy, a heat storage tank utilizing waste heat of an air conditioner or the like has been used. There has been proposed a hot water supply device for heating water stored in the inside.

[0004] As a hot water supply device for producing waste heat, for example, as shown in Fig. 2, a coil-shaped heat exchanger 2A is disposed in a heat storage tank 1 storing water A, and the heat exchanger 2A is provided. To the waste heat source 6 via a heat medium pipe 10,
There is one in which a heat medium from the waste heat source 6 is introduced into a coil-shaped heat exchanger 2A disposed in the heat storage tank 1 to heat water A stored in the heat storage tank 1. In this case, the heated water A is discharged from the heat storage tank 1 through the hot water supply pipe 5 by opening the faucet 9 and by the water pressure of the water supply pipe 4 connected to the heat storage tank 1. This water heater uses the waste heat from the waste heat source 6 to heat the water A stored in the heat storage tank 1, so that it has an advantage that energy can be effectively used.
Since the heat exchanger 2A is disposed in the heat storage tank 1, maintenance and inspection of the heat exchanger 2A are troublesome, and there is a problem that maintenance cost is increased.

To address this problem, for example, FIG.
As shown in the figure, the heat storage tank 1 for storing the heated water A and the heat exchanger 2B for heating the water A are formed separately, and the heat exchanger 2A is provided with the circulation pump 3. The heat storage tank 1 is connected via the water pipe 11, and the waste heat source 6 is connected via the heat medium pipe 10, so that the water from the heat storage tank 1 and the heat medium from the waste heat source 6 are heated. There is one in which the water A is heated by being introduced into the exchanger 2B. in this case,
By opening the faucet 9, the heated water A is discharged from the heat storage tank 1 via the hot water supply pipe 5 by the water pressure of the water supply pipe 4 connected to the heat storage tank 1. In this water heater, the water A stored in the heat storage tank 1 is heated by using the waste heat from the waste heat source 6, so that the energy can be effectively used. Since the heat exchanger 2B is configured separately from the heat exchanger 2B, the heat exchanger 2B can be easily maintained and inspected, and the maintenance cost required for the heat exchanger 2B can be reduced. The circulation pump 3 is connected to the water pipe 11 connecting the exchanger 2A.
And there is a problem that the cost required for this is separately required.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems of the conventional hot water supply apparatus, and has a configuration in which the heat storage tank and the heat exchanger are formed separately, and maintenance and inspection of the heat exchanger are performed. It is an object of the present invention to provide a hot water supply apparatus which can be easily performed and can omit a circulation pump for a water pipe connecting a heat storage tank and a heat exchanger.

[0007]

In order to achieve the above object, a water heater according to the present invention comprises a heat exchanger for heating water and a heat storage tank for storing the heated water. Utilizing natural convection generated by heating water, water in the heat storage tank is circulated and heated between the heat exchanger and the heat exchanger.

In this hot water supply apparatus, the heat storage tank and the heat exchanger are formed separately, and water in the heat storage tank is exchanged by utilizing natural convection generated by heating water in the heat exchanger. Because it circulates between and heats,
The pump for circulating the water pipe connecting the heat storage tank and the heat exchanger can be omitted while the maintenance and inspection of the heat exchanger can be easily performed.

In this case, it is possible to dispose the vertically formed heat exchanger along the height direction of the heat storage tank, and connect the lower part and the upper part of the heat exchanger and the heat storage tank with water pipes, respectively. it can.

As a result, a large natural convection is generated,
The water in the heat storage tank can be efficiently circulated and heated between the heat exchanger and the heat exchanger.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a water heater according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the hot water supply apparatus of the present invention. The hot water supply apparatus includes a heat storage tank 1 having a required capacity for storing heated water A, and a heat exchanger 2 for heating water A.
And a heat storage tank 1 via a water pipe 11 and a heat medium pipe 1 in the heat exchanger 2A.
0, the waste heat sources 6 are connected to each other, and the water A from the heat storage tank 1 and the heat medium from the waste heat source 6 are introduced into the heat exchanger 2 to heat the water A.

In this case, the heated water A is discharged from the heat storage tank 1 through the hot water supply pipe 5 by opening the faucet 9 and by the water pressure of the water supply pipe 4 connected to the heat storage tank 1. Have been.

In this embodiment, the heat storage tank 1
When the water A and the heat medium from the waste heat source 6 are introduced into the heat exchanger 2 to heat the water A, natural heat convection generated by heating the water A in the heat exchanger 2 is used to heat the heat storage tank 1. The internal water can be circulated between the heat exchanger 2 and heated.

In particular, as shown in this embodiment, the heat exchanger 2 is formed in a vertically long shape having the same height as the heat storage tank 1, and the heat exchanger 2 is arranged in the height direction of the heat storage tank 1. And a large natural convection is generated by connecting the lower part and the upper part of the heat storage tank 1 and the heat exchanger 2 with the water pipe 11, respectively, so that the water in the heat storage tank 1 is exchanged with the heat exchanger. 2 and can be efficiently circulated and heated.

Further, as shown in this embodiment, the water pipe 11 on the return side from the heat exchanger 2 is connected to the hot water supply pipe 5 extending vertically from the heat storage tank 1 without being connected to the heat storage tank 1. By doing, the high-temperature water A heated in the heat exchanger 2
It can be supplied directly to the hot water supply pipe 5.

As described above, in this hot water supply apparatus, the heat storage tank 1 and the heat exchanger 2 are formed separately, and the natural heat convection generated by heating the water A in the heat exchanger 2 is used to store the heat. Since the water A in the tank 1 is circulated and heated between the heat exchanger 2 and the heat exchanger 2, the maintenance and inspection of the heat exchanger 2 and the like can be easily performed. The circulating pump for the water pipe 11 for connecting the heat exchanger 1 and the heat storage tank 2, which has been essential, can be omitted. Further, by using the waste heat from the waste heat source 6 to heat the water A stored in the heat storage tank 1, it is possible to effectively use energy.

The water pipe 11 connecting the heat exchanger 1 and the heat storage tank 2 is provided with valves 7 and 8, for example, a heat medium from a waste heat source 6 is introduced into the heat exchanger 2. If not, the water pipe 11 is cut off, or if the amount of heat of the heat medium introduced into the heat exchanger 2 from the waste heat source 6 is small, the water pipe 11 is cut off temporarily. After heating to a temperature at which natural convection occurs, the water pipe 11 can be made conductive. These valves 7, 8
Can be a manual type or an electric type. Further, a temperature sensor (not shown) installed in the water pipe 11 on the return side from the heat exchanger 2 uses a temperature sensor on the return side from the heat exchanger 2. And an automatic valve that automatically opens and closes based on the detected temperature may be employed. Further, by disposing the valves 7 and 8 in the water pipe 11 connecting the heat storage tank 1 and the heat exchanger 2, the valves 7 and 8 are closed to perform maintenance and inspection of the heat exchanger 2. Can be done.

As described above, the hot water supply apparatus of the present invention has been described based on the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the configuration may be appropriately changed without departing from the gist thereof. Can be changed. The heat source of the hot water supply device of the present invention uses, for example, waste heat discharged from a condenser of an air conditioner to condense the heated refrigerant and heat the refrigerant as a heat medium in order to effectively use energy. Although it can be configured to be introduced into the heat exchanger 2 via the pipe 10 and circulated, the heat source is not only such a waste heat source but also a fuel such as electricity, gas, or oil as an energy source. Those can be used, and the present invention does not exclude this.

[0020]

According to the hot water supply apparatus of the present invention, the heat storage tank and the heat exchanger are formed separately, and the natural convection generated by heating the water in the heat exchanger is used to heat the heat storage tank. Water is circulated and heated between the heat exchanger and the heat exchanger, so that maintenance and inspection of the heat exchanger can be performed easily, and the water pipe connecting the heat storage tank and the heat exchanger The circulation pump can be omitted. Thereby, the cost required for the circulation pump is not required, and both the initial cost and the running cost can be reduced.
Maintenance and inspection of the circulation pump are not required, and maintenance and inspection of the heat exchanger can be simplified, and maintenance and inspection of the water heater can be simplified.

A vertically long heat exchanger is provided along the height direction of the heat storage tank, and the lower part and the upper part of the heat exchanger and the heat storage tank are connected by a water pipe, respectively.
A large natural convection is generated, and water in the heat storage tank can be efficiently circulated and heated with the heat exchanger.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a hot water supply apparatus of the present invention.

FIG. 2 is an explanatory view showing a conventional hot water supply apparatus.

FIG. 3 is an explanatory view showing a conventional hot water supply apparatus.

[Explanation of symbols]

 Reference Signs List 1 heat storage tank 2 heat exchanger 2A heat exchanger 2B heat exchanger 3 circulation pump 4 water supply pipe 5 hot water supply pipe 6 waste heat source 7 valve 8 valve 9 faucet 10 refrigerant circuit 11 water pipe

Claims (2)

[Claims] 1. A heat exchanger for heating water, and a heat storage tank for storing the heated water, wherein a natural convection generated by heating the water in the heat exchanger is used to store heat in the heat storage tank. A water heater, wherein water is circulated between a heat exchanger and heated. 2. A vertically long heat exchanger is provided along the height direction of the heat storage tank, and the lower part and the upper part of the heat exchanger and the heat storage tank are connected to each other by a water pipe. The hot water supply apparatus according to claim 1, wherein