JPS599185Y2 - Water heater using waste heat - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water heater that utilizes heat discharged from a chimney of a household dust incinerator or the like.

Conventionally, heat has been discharged directly from household dust incinerators and chimneys in bathrooms, etc., and a lot of heat energy has been wasted.

An object of the present invention is to provide a water heater using waste heat that can efficiently produce hot water by using the heat discharged from a household chimney without waste as described above.

Next, embodiments of the present invention will be described.

The water heater 6 of this example, which is schematically shown in the drawing, is a household dust incinerator 1.
The heat discharged from the smoke tube 5 is utilized.

The dust incinerator 1 is equipped with a grate 3 at the bottom of a cylindrical container body 2, a dust inlet 4 with a door at a position above the grate 3 on the circumferential wall of the container body 2, and a dust inlet 4 with a door at the upper end of the container body 2. A cylindrical smoke pipe 5 is installed upright.

In the water heater 6 of this example, the peripheral wall of the smoke tube 5 is connected to a heat-receiving inner peripheral wall 8.
A heat-retaining type water tank 7 is provided in which the outer circumferential wall 9, top plate 10, and bottom plate 11 have a double wall structure with insulation material, and a heat receiving tube 12 made of a spiral steel pipe is inserted into the smoke tube 5. The inlet 13 at the lower end is connected to the water supply pipe 14 with an on-off valve 15 interposed, and is also connected to the lower part of the water tank 7 through the inflow pipe 16 with an inflow check valve 17 interposed. The outlet 18 at the upper end is connected to a water pipe 19 with an on-off valve 20 interposed therebetween, and is connected to the upper part of the water tank 7 via an outflow pipe 21 with an outflow check valve 22 interposed therebetween, with an on-off valve 24 interposed therebetween. A drain pipe 23 is connected to the lower part of the water tank 7.

In addition, in the figure, 25 is a liquid level gauge of the water tank, and 26 is an air hole of the water tank.

When using the water heater 6 of this example as an instantaneous water heater,
While the dust incinerator 1 is in use, the on-off valve 15 of the water supply pipe connected to a water supply (not shown) is opened, and the on-off valve 20 of the water pipe is opened.

Then, the water supplied to the water supply pipe 14 passes through the heat receiving pipe 12 and reaches the water pipe 19, and when passing through the heat receiving pipe 12, it is destroyed by combustion gas such as paper dust and cardboard dust passing through the smoke tube 5 of the dust incinerator. The water is heated and turned into hot water and exits from the faucet of the water pipe 19.

When using the water heater 6 of this example as a storage type water heater,
The on-off valve 15 of the water supply pipe connected to the water supply pipe is opened, and the on-off valve 20 of the water pipe is closed.

Then, the water supplied to the water supply pipe 14 flows out into the water tank 7 through the heat receiving pipe 12 and the outflow pipe 21 with the outflow check valve 22, and is stored therein.

When the water in the water tank 7 reaches an appropriate amount, the on-off valve 15 of the water supply pipe is closed to stop the water supply.

When the dust incinerator 1 is used after storing water in the water tank 7, the water in the heat receiving tube 12 is heated by the combustion gas passing through the smoke tube 5 of the dust incinerator and becomes hot water. The water in the lower part of the water tank 7 flows out through the outflow pipe 21 with the outflow check valve 22 to the upper part of the water tank 7. On the other hand, the water in the lower part of the water tank 7 flows through the inflow pipe 16 with the inflow check valve 17 and the lower end of the heat receiving pipe 12. Population 13
The water flows into the heat receiving tube 12 through the heat receiving tube 12, is heated by the combustion gas in the smoke tube 5, becomes hot water, and flows into the heat receiving tube 12, the outflow tube 21,
Circulation occurs around the water tank 7 and the inflow pipe 16, and the cold water in the lower part of the water tank 7 sequentially flows into the heat receiving pipe 12 and is heated.The water in the water tank 7 is efficiently heated by the above circulation, and the water in the water tank 7 is heated. The ice in contact with the heat-receiving inner circumferential wall 8 is heated by the combustion gas passing through the smoke tube 5, and eventually the water in the water tank 7 efficiently becomes hot water.

When taking out the hot water stored in the heat-retaining water tank 7, the on-off valve 24 of the drain pipe is opened.

Then, the hot water in the water tank 7 comes out from the faucet of the drain pipe 23.

The water heater of the above embodiment is a smoke pipe 5 of a household dust incinerator 1.
Although the heat emitted from the smoke pipe is used, it is also possible to use the heat emitted from a domestic bath or other chimney.

Further, although the water supply pipe 14 is provided with the on-off valve 15, the water supply and water cut-off may be operated using the water supply on-off valve connected to the water supply pipe without providing the on-off valve.

As is clear from the description of the embodiments above, the water heater of the present invention is an instant type water heater or a storage type water heater that uses heat discharged from a smoke tube such as a household dust incinerator as a heat source. It can be used as a container to instantly obtain hot water using the heat emitted from a domestic smoke pipe, or it is necessary to store hot water obtained using the heat emitted from a domestic smoke pipe. It can be taken out at any time.

When used as a storage type water heater, the water in the water tank is efficiently heated by both the heat receiving tube in the smoke tube and the surrounding wall of the smoke tube. While the water flows to the upper part, the water in the lower part of the water tank flows into the heat receiving tube, and the water circulates between the heat receiving pipe and the water tank, and the water in the water tank is efficiently heated.

[Brief explanation of the drawing]

The drawing is a schematic longitudinal sectional view of a water heater utilizing waste heat according to an embodiment of the present invention. 1: Dust incinerator, 5: Smoke tube, 6: Water heater, 7: Water tank, 8:
Heat receiving inner peripheral wall, 12: Heat receiving pipe, 13: Inlet, 14: Water supply pipe, 17: Inflow check valve, 18: Outlet, 19: Water pipe, 2
0: Open/close valve, 22: Outflow check valve, 23: Drain pipe, 24
: Open/close valve.

Claims (1)

[Scope of utility model registration request] A heat-retaining type water tank is installed with the heat-receiving wall surrounding the chimney of a household dust incinerator, etc., a heat-receiving pipe is inserted into the chimney, the inlet of the heat-receiving pipe is connected to a water supply pipe, and a check valve for inflow is installed. The outlet of the heat receiving tube is connected to the lower part of the water tank through an on-off valve, and the outlet of the heat receiving pipe is connected to a water supply pipe with an on-off valve interposed. A water heater using waste heat characterized by a drain pipe connected to the lower part of the water tank.