JP3188882B2 - Heat storage structure of boiler or water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage structure for a household water heater or a commercial boiler.

[0002]

2. Description of the Related Art In a conventional boiler, as shown in FIG. 6, water supplied from a water storage tank 5 is heated in a hot water tank 12 by a burner 4, and boiling water is returned to the water storage tank 5 by an expansion pipe 3. Hot water is supplied from the hot water supply valve 6 except for some of the hot water to be supplied. High-temperature gas containing water vapor stored in the boiler main body 11 in which the hot water storage tank 9 is installed is exhausted from the chimney 12.

As shown in FIG. 7, a conventional water heater has a burner 4 inside a water heater main body 21 and one end connected to a water supply pipe above the burner 4 and the other end connected to the water supply pipe. A heat exchanger 8 having a meandering pipe is installed, and an outlet 22 for discharging air inside the water heater body 21 heated by the burner 4 is provided in the water heater body 21 above the heat exchanger 8. Is provided.

[0004]

However, the gas containing water vapor exhausted from the chimney of the conventional boiler is not effectively used, despite having high temperature and large heat, and is not used effectively. The high-temperature air discharged from the exhaust port is not effectively utilized, but is discharged to the atmosphere as it is, wasting energy.

In view of the above, an object of the present invention is to provide a heat storage structure in a boiler or a water heater for improving thermal efficiency by utilizing a part of heat exhausted conventionally.

[0006]

SUMMARY OF THE INVENTION The present invention provides a boiler body having a hot water tank, a burner, and a chimney, a water tank, a water supply pipe for supplying water from the water tank to the hot water tank, In a boiler having an expansion pipe for returning a part of boiling water of a tank to the water storage tank, a pump for pumping hot water heated in the water storage tank, and the hot water storage tank connected to the pump and connected to a hot water supply faucet again. A boiler, wherein a return pipe for returning hot water to the tank and circulating the hot water is provided, and the water supply pipe and the return pipe are arranged in a meandering manner above the hot water storage tank. The gist is a heat storage structure.

Also, a boiler body having a hot water tank, a burner, and a chimney, a water storage tank, a water supply pipe for supplying water from the water storage tank to the hot water tank, and a part of boiling water in the hot water tank A boiler having an expansion pipe for returning the hot water to the water storage tank, a pump for pumping hot water heated in the hot water storage tank, and returning and circulating hot water to the hot water storage tank again while being connected to the pump and connected to a hot water supply faucet. A return pipe to be provided, and a heat storage tank having a hollow portion capable of temporarily storing water inside the boiler main body, the heat storage tank being provided with a water supply pipe and the water storage tank, The water in the water storage tank connected to the hot water tank is sent to the hot water tank via the heat storage tank,
The heat storage structure of the boiler is characterized in that a part of the return pipe is arranged in a meandering manner above the hot water storage tank and below the heat storage tank.

[0008]

[0009]

[0010]

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of a heat storage type boiler showing a first embodiment of a heat storage structure of a boiler according to the present invention. As shown in FIG.
Water pipe 14 located above hot water storage tank 9 while water is supplied to
A part of the return pipe 13 of the hot water which is drawn up from the hot water storage tank 9 by the pump 7 and supplied from the hot water supply valve 6 and circulated to the hot water storage tank 9 again when the hot water is not used (the hot water storage tank 9). Of the hot water flowing inside the return pipe 13 to the water supply pipe 14 by disposing the water supply pipe 14 and a part of the return pipe 13 in a meandering manner. The water flowing through the water supply pipe 14 is transmitted to the hot water storage tank 9 after being indirectly warmed. The meandering water supply pipe 14 and return pipe 1
3 is arranged above the hot water storage tank 9, a part of the steam heat exhausted from the hot water storage tank 9 is directly transferred to the chimney 12.
The heat is supplied to the meandering water supply pipe 14 and the return pipe 13 without being discharged from the water supply pipe, and the water or hot water flowing inside the water supply pipe 14 and the return pipe 13 is warmed and then placed on the upper portion of the boiler body 11. Exhaust from the chimney 12 which is located.

FIG. 2 is an explanatory view of a heat storage type boiler showing a second embodiment of the heat storage structure of the boiler according to the present invention.
As shown in this figure, it is the same as FIG. 1 that a part of the return pipe 13 is arranged in a meandering manner, but the water supply pipe 14b is connected to the hot water storage tank 9 at one end without meandering. . On the other hand, the other end of the water supply pipe 14b is configured to be connected to a heat storage tank 15 having a U-shaped vertical section installed at the top of the boiler body 11. The heat storage tank 15 is a tank having a hollow portion capable of temporarily storing water therein and made of a material easily transmitting heat, and absorbs a part of steam heat exhausted from the hot water storage tank 9,
The water supplied from the water storage tank 5 to the heat storage tank 15 via the water supply pipe 14a is heated. Other configurations are the same as those of the boiler of FIG.

FIG. 3 is an explanatory view of a heat storage type water heater showing a third embodiment of the heat storage structure of the water heater according to the present invention. As shown in this figure, the configurations of the boiler 4 and the heat exchanger 8 in the water heater main body 21 are the same as the conventional one, but the heat exchanger 8 is extended at one end to transfer heat to a position higher than the exhaust port 22. The structure has an auxiliary heat exchanger section 80 in which pipes (heat transfer tubes) that are easy to transmit are arranged in a meandering manner. The auxiliary heat exchanger section 80 supplies the high-temperature air heated by the boiler 4 to the exhaust port 22.
Instead of being discharged to the outside as it is, the auxiliary heat exchanger unit 80 is heated, and the water flowing inside the auxiliary heat exchanger unit 80 is indirectly heated, and then discharged from the exhaust port 22. Therefore, the water flowing through the water supply pipe 14 is sent to the auxiliary heat exchanger section 80, and after being slightly heated by the auxiliary heat exchanger section 80, it is further heated by the heat exchanger 8 to become high-temperature hot water. It is sent to the tube 16.

FIG. 4 is an explanatory view of a heat storage type water heater showing a fourth embodiment of the heat storage structure of the water heater according to the present invention. As shown in this figure, the configurations of the boiler 4 and the heat exchanger 8 in the water heater main body 21 are the same as those of the conventional water heater main body 21.
A heat storage tank 23 having a U-shaped vertical section is installed at the uppermost part. The heat storage tank 23 is a tank made of a material that easily transmits heat and has a hollow portion in which water can be temporarily stored. Further, the heat storage tank 23 is configured to be connected to one end of the water supply pipe and one end of the heat exchanger 8, so that the high-temperature air heated by the boiler 4 may be directly discharged from the exhaust port 22. Instead, the heat storage tank 23 is heated, the water flowing inside the heat storage tank 23 is indirectly warmed, and then discharged from the exhaust port 22. Therefore, the water pipe 1
4 is sent to the heat storage tank 23,
After being slightly heated by the heat exchanger 8, it is further heated by the heat exchanger 8 to become hot water and sent to the hot water supply pipe 16.

FIG. 5 is an explanatory view of a heat storage type water heater showing a fifth embodiment of the heat storage structure of the water heater according to the present invention. As shown in this figure, this is an embodiment in which the embodiment shown in FIG. 3 and the embodiment shown in FIG. 4 are combined. That is, the configurations of the boiler 4 and the heat exchanger 8 in the water heater main body 21 are the same as those in the related art. And an auxiliary heat exchanger section 80,
1 has a configuration in which a heat storage tank 23 having a U-shaped vertical section is installed. The heat storage tank 23 is a tank made of a material that easily transmits heat and has a hollow portion in which water can be temporarily stored. The heat storage tank 23 is configured to be connected to one end of the water supply pipe 14 and one end of the auxiliary heat exchanger section 80, and the high-temperature air heated by the boiler 4 is directly discharged from the exhaust port 22 to the outside. Instead of being heated, the auxiliary heat exchanger 80 is warmed, the water flowing inside the auxiliary heat exchanger 80 is indirectly warmed, the heat storage tank 23 is heated, and the water flowing inside the heat storage tank 23 is heated. After being indirectly warmed, it is discharged from the exhaust port 22. Therefore, the water flowing through the water supply pipe 14 is sent to the heat storage tank 23,
After being slightly heated in the heat storage tank 23, it is further heated while passing through the auxiliary heat exchanger section 80, and is finally further heated in the heat exchanger 8 to become high-temperature hot water and sent to the hot water supply pipe 16. It is.

It goes without saying that various embodiments can be adopted without departing from the spirit of the present invention. For example, the shape of the heat storage tank is not limited to a U-shaped vertical cross section, but can be changed according to the shape of a boiler or a water heater. The heat storage tank, the water supply pipe, the return pipe, the hot water supply pipe, and the like are made of metal or the like, such as a copper plate or a copper pipe, which easily transfers heat to internal water or hot water. In the first embodiment shown in FIG. 1, the water supply pipe 14 and the return pipe 13 which are partly meandering are arranged in contact with each other, but the two pipes 14 and 13 are not contacted. It is also possible to adopt a configuration of meandering and disposing.

[0017]

As described above, the present invention provides a boiler body having a hot water tank, a burner, and a chimney, a water storage tank, a water supply pipe for supplying water from the water storage tank to the hot water tank, In a boiler having an expansion pipe for returning a part of boiling water in a hot water tank to the water storage tank, a pump for pumping hot water heated in the hot water tank, and a pump connected to the pump and connected to a hot water supply faucet again. A boiler provided with a return pipe for returning hot water to a hot water storage tank and circulating the hot water, wherein the water supply pipe and the return pipe are arranged in a meandering manner above the hot water storage tank. The main feature of the heat storage structure is that the heat of the exhaust containing high-temperature steam, which had been discharged directly from the chimney, was meandered, and the heat for warming the water or hot water flowing inside the water supply pipe and return pipe was arranged. Used as Since, compared with the conventional boiler can be enhanced thermal efficiency, it is possible to provide a boiler of the energy saving.

Also, a boiler body having a hot water tank, a burner, and a chimney, a water storage tank, a water supply pipe for supplying water from the water storage tank to the hot water tank, and a part of boiling water in the hot water tank A boiler having an expansion pipe for returning the hot water to the water storage tank, a pump for pumping hot water heated in the hot water storage tank, and returning and circulating hot water to the hot water storage tank again while being connected to the pump and connected to a hot water supply faucet. A return pipe to be provided, and a heat storage tank having a hollow portion capable of temporarily storing water inside the boiler main body, the heat storage tank being provided with a water supply pipe and the water storage tank, The water in the water storage tank connected to the hot water tank is sent to the hot water tank via the heat storage tank,
Above the hot water tank and below the heat storage tank, the heat storage structure of the boiler is characterized in that a part of the return pipe is arranged in a meandering manner,
While the water sent from the water supply pipe is stored in the heat storage tank, the heat of the exhaust containing high-temperature steam moving upward from the bottom of the boiler heats the return pipe arranged in a meandering manner, Since the heat storage tank is also heated, the thermal efficiency can be increased as compared with the conventional boiler, and an energy-saving boiler can be provided.

[0019]

[0020]

[0021]

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first embodiment of a heat storage structure according to the present invention.

FIG. 2 is an explanatory view showing a second embodiment of the heat storage structure according to the present invention.

FIG. 3 is an explanatory view showing a third embodiment of the heat storage structure according to the present invention.

FIG. 4 is an explanatory view showing a fourth embodiment of the heat storage structure according to the present invention.

FIG. 5 is an explanatory view showing a fifth embodiment of the heat storage structure according to the present invention.

FIG. 6 is an explanatory view showing the internal structure of a conventional boiler.

FIG. 7 is an explanatory view showing the internal structure of a conventional water heater.

[Explanation of symbols]

 Reference Signs List 1 boiler 2 water heater 3 expansion pipe 4 burner 5 water storage tank 6 hot water supply valve 7 pump 8 heat exchanger 9 hot water storage tank 11 boiler main body 12 chimney 13 return pipe 14 water supply pipe 15, 23 heat storage tank 16 hot water supply pipe 21 hot water supply main body 22 exhaust Mouth 80 Auxiliary heat exchanger

Claims (2)

(57) [Claims] 1. A boiler body having a hot water tank, a burner, and a chimney, a water storage tank, a water supply pipe for supplying water from the water storage tank to the hot water tank, and a part of boiling water in the hot water tank. A boiler having an expansion pipe for returning the hot water to the water storage tank, a pump for pumping hot water heated in the hot water storage tank, and returning and circulating hot water to the hot water storage tank again while being connected to the pump and connected to a hot water supply faucet. A heat storage structure for a boiler, wherein a return pipe is provided, and the water supply pipe and the return pipe are arranged in a meandering manner above the hot water storage tank. 2. A boiler body having a hot water tank, a burner, and a chimney, a water storage tank, a water supply pipe for supplying water from the water storage tank to the hot water tank, and a part of boiling water in the hot water tank. A boiler having an expansion pipe for returning the hot water to the water storage tank, a pump for pumping hot water heated in the hot water storage tank, and returning and circulating hot water to the hot water storage tank again while being connected to the pump and connected to a hot water supply faucet. A return pipe to be provided, and a heat storage tank having a hollow portion capable of temporarily storing water inside the boiler main body, the heat storage tank being provided with a water supply pipe and the water storage tank, The water in the water storage tank connected to the hot water tank is sent to the hot water tank via the heat storage tank,
A heat storage structure for a boiler, wherein a part of the return pipe is arranged in a meandering manner above the hot water storage tank and below the heat storage tank.