JPS6126842Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a forced exhaust device for an instantaneous water heater. In conventional gas instantaneous water heaters, the combustion gas is discharged through natural exhaust, so the allowable back pressure on the exhaust side is inevitably small, so the heat exchange part cannot be designed to prioritize heat exchange efficiency. High-temperature combustion gas that could still be used for heat exchange was discharged, resulting in wasteful consumption of fuel.

The present invention incorporates a forced exhaust device into the instantaneous water heater and increases the allowable back pressure on the exhaust side, thereby giving priority to the heat exchange rate in the shape of the heat exchange section and the shape of the exhaust pipe (length, number of bends, etc.). Eliminates restrictions on the selectivity of the exhaust port, maximizes the use of exhaust heat from the exhaust gas, and uses water supply pressure to drive the exhaust fan without using external drive sources such as electricity, resulting in complete energy savings. This type of instant water heater is provided.

An embodiment of the present invention will be described based on the drawings. As shown in FIG. Exhaust pipe 5 connected to the top
and an impeller chamber 6 inserted into the water supply conduit 1,
an impeller 8 pivotally supported 7 on the chamber wall; an exhaust fan 11 pivotally supported 10 on a fitting 9 in the exhaust pipe 5;
It is composed of a transmission device 12 made of a bevel gear or the like that connects the impeller 8 and the exhaust fan 11 so as to integrally rotate, a water tap 13 attached to the hot water outlet of the heating pipe 2, and a faucet 14. ing.

In such a configuration, when the gas burner 3 is ignited and the faucet 13 is opened, tap water passes through the water supply conduit 1 due to its water pressure, undergoes heat exchange in the heating tube 2 in the heater 4, and then becomes hot water and is delivered to the faucet 14. At the same time, this water flow rotates the impeller 8 in the impeller chamber 6, so that the exhaust fan 11 connected to the impeller 8 so as to rotate integrally with the impeller 8 is driven. The exhaust gas is forcibly discharged to the outside through the exhaust pipe 5.

As explained above, the present invention has the effect of increasing the heat exchange rate and reducing fuel consumption by using a simple forced exhaust device consisting of an impeller fitted in a water supply pipe, an exhaust fan fitted in an exhaust pipe, and a transmission device which rotates the impeller and exhaust fan together without using an external drive source.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention. Impeller...8, exhaust fan...11, transmission device...12. 〓〓〓〓

Claims (1)

[Scope of utility model registration request] A forced exhaust system consisting of an impeller fitted in a water supply pipe, an exhaust fan fitted in an exhaust pipe, and a transmission device that connects the impeller and exhaust fan so that they rotate integrally. An instant water heater with a