JPS6029857B2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water heater used in kitchens, central heating, etc.

As shown in FIG. 1, in the conventional water heater of this kind, heat exchange pipes 3 connected to cold water pipes 8 and hot water pipes 9 are spirally wound in several stages around the outer peripheral surface of a heat exchanger main body 2, and the heat exchanger is It has a structure in which fins 4 are attached to the upper part of the exchange pipe 3, and a burner 1 is provided at the bottom of the combustion chamber 7 in the heat exchanger body 2, and cold water supplied from the cold water pipe 8 flows through the heat exchange pipe 3. During this time, heat is exchanged and the water becomes hot water, which is taken out from the hot water pipe 9.

In the above structure, the flame 5 becomes large when the combustible gas ejected from the burner 1 is combusted by the secondary air 6 flowing in from the bottom of the combustion chamber 7, so the combustion chamber 7 must be made larger. As a result, the overall size of the water heater becomes large and the thermal efficiency also decreases. In view of the above-mentioned drawbacks, the present invention aims to provide a water heater that is small in size and has good thermal efficiency. A burner having a jet nozzle is passed through the combustion chamber, and the jet nozzle is opened into each space formed by the adjacent plate fins to form a combustion chamber.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 11 indicates a plurality of plate fins arranged in parallel at appropriate intervals, 12 indicates heat exchange tubes arranged in a meandering manner passing through each plate fin 11, and 13 indicates each plate fin. 1 A burner passing through 1, 14 is a plurality of ejection ports provided in the burner 13, and each ejection row 4 opens into each space formed by adjacent plate fins 11.
has been done.

In this way, each combustion chamber 15a to 15c is constituted by the burner 3 having each jet port 14 and the adjacent plate fins 11. Since the present embodiment is configured as described above, the combustible gas 10 ejected from each ejection row 4 of the burner 3 into each combustion chamber 15a to 15c is combusted by the secondary air 17 to form a flame 18.

On the other hand, the heat exchange tube 1 attached to each plate fin 11
The cold water supplied from the second inflow row 2a is heated while flowing through the heat exchange tube 12 to become hot water, which is taken out from the outlet 12b. FIG. 3 shows another embodiment in which only one burner is used.

As explained above, the present invention has the following effects.

'11 Since the combustion chamber and the heat exchanger can be shared, the entire water heater can be downsized. {2) Since the flames are subdivided and a combustion chamber that also serves as a heat exchanger is configured for each flame, the combustion chamber wall directly serves as a heat exchange and heat transfer surface, resulting in good thermal efficiency. Glue Since the flame is divided into smaller pieces, the surface area of the flame surface becomes larger, resulting in better thermal efficiency.

'4} Since the heat of the burner is absorbed by the fins, it is possible to improve thermal efficiency, prevent the burner from overheating, and stabilize the flame.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional water heater, FIG. 2 is a perspective view of an embodiment of the water heater of the present invention, and FIG. 3 is a perspective view of another embodiment of the present invention. 11...Plate fin, 12...Heat exchange tube, 13...Burner, 14...Ejection port, 15a-15c...Combustion Room. Illustrated illustration of the younger brother, Figure 2, Figure 3

Claims (1)

[Claims] 1 A heat exchange tube and a burner having a plurality of jetting ports are passed through a plurality of plate fins arranged in parallel at appropriate intervals, and the jetting ports are inserted into each space formed by the adjacent plate fins. A water heater consisting of combustion chambers that are each opened.