JPS6231821Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to water heaters that generate condensate (condensed water) from exhaust gas during heat exchange, and improves the condensate recovery structure to ensure reliable condensate recovery and uniform combustion exhaust gas distribution. This is intended to improve thermal efficiency, etc.

Conventionally, as a drain recovery means in a gas water heater, for example, heat exchangers are arranged vertically apart, and a drain receiver is installed between the upper heat exchanger and the lower heat exchanger as shown in Fig. 6. A cover plate 1'' is provided directly above a vent hole 2' bored in the center of the plate 1', leaving a certain gap to cover the vent hole 2'. The structure is connected to the drain port 3', so that the combustion exhaust gas that has passed through the lower heat exchanger B' is guided upward through the vent port 2' and through the gap between the drain receiving plate 1' and the cover plate 1''. Condensate condensed from the combustion exhaust gas that passed through the upper heat exchanger A' (see arrow b' in Figure 6) and became low temperature in this section drips and accumulates on the drain receiving plate 1', and the accumulated condensate A lower plate 1' with a number of vent holes 2' bored in rows at equal intervals as shown in Fig. The upper plate 1'' has ventilation holes 2'' drilled in rows at equal intervals, and the ventilation holes 2' and 2'' are placed in different positions so that the ventilation holes 2' and 2'' are hidden from each other when viewed from above and below. The upper and lower plates 1' are arranged side by side with a certain gap between them, and one side of the upper surface of the lower plate 1' is connected to the drain outlet 3'. ', 1'' displaceable vent 2',
The condensate that has accumulated on the lower plate 1' is drained to one side. It is already known that the exhaust gas is led to the drain outlet 3' of the upper stage heat exchanger A', but especially in the former case, the combustion exhaust gas for the upper stage heat exchanger A' flows intensively around the outer periphery of the upper heat exchanger A'. The overall effect of the heat exchanger A' is poor due to the poor distribution of exhaust gas, and in the latter case, the resistance when the combustion exhaust gas passes through the upper and lower vents 2' and 2'' is large, resulting in a reduction in the number of man-hours required for processing. It had drawbacks such as requiring a lot of work.

In order to solve the above-mentioned conventional drawbacks, this invention consists of a plurality of plate-like bodies arranged with a certain exhaust gap, their ends slightly overlapping each other, and slanted toward the drain port. One embodiment will be specifically described below based on the drawings.

In Figures 1 to 5, A is the auxiliary heat exchanger installed in the upper stage, B is the main heat exchanger installed in the lower stage, and C is the main heat exchanger installed in the lower stage.
1 is an exhaust passage formed between the upper stage auxiliary heat exchanger A and the lower stage main heat exchanger B; 1 is a plurality of plate-like bodies disposed in the exhaust passage C; There is an exhaust gap 2 between the bodies 1 and 1, and they overlap each other in the horizontal direction at the ends, and are arranged individually so as to be inclined downward toward a drain outlet 3, which will be described later, provided on one side of the lower part of the exhaust passage C. At the same time, the lower end upper surface of the lowermost plate-shaped body 1 is made to communicate with the drain outlet 3 and is welded to maintain watertightness (see FIG. 2). Also, as shown in FIG. 3, a single long plate is bent to form a plurality of plate-like bodies 1 integrally and continuously in a stepwise manner, and an exhaust port 1a is bored in the bent part 1b, or , as shown in FIG. 4, a plurality of separate plate bodies 1 are bent into a substantially V-shape with the central part lowered, and the ends of the plate bodies 1 are bent horizontally with an exhaust gap 2. is arranged with a certain downward slope toward the drain outlet 3 in a state where it is slightly overlapped with the drain outlet 3, and the lower end upper surface of the lowermost plate-like body 1 is communicated with the drain outlet 3,
Further, as shown in FIG. 5, the center of one plate is lowered and bent into a substantially V-shape, and this is bent into a step-like shape to form a plurality of plate-like bodies 1 integrally and continuously. The same effect as described above can also be achieved by providing an exhaust port 1a in the bending portion 1b. In addition, 4 is a drain pipe connected to the drain outlet 3, and a reservoir part 5 bent in a U-shape is provided in the middle of the drain pipe, and the drain collected in the reservoir part 5 blocks the exhaust passage C and the outside air in the drain pipe 4. However, the combustion exhaust gas in the exhaust passage C is prevented from leaking out of the vessel from the drain pipe 4. 6 is an inner shell, and 7 is a heat absorption tube. Incidentally, when the plate-like body 1 is constructed of a single plate as shown in FIG. 3, it is very easy to fix it to the container body. Although the above embodiment shows a case in which two heat exchangers are disposed above and below, it is of course applicable to a single heat exchanger without a lower heat exchanger.

In the above configuration, the combustion exhaust gas that has passed through the lower heat exchanger B bypasses the exhaust gap 2 between the plate bodies 1 or the exhaust port 1a and rises directly above it (see arrow b in FIG. 1). , in order to evenly contact and flow through each part of the upper heat exchanger A.
Heat exchanger A reliably removes the residual heat of the combustion exhaust gas
To efficiently heat and raise the temperature of water flowing through the heat absorption pipe 7. In addition, condensate condensed from the low-temperature combustion exhaust gas flows down on each plate-like body 1 along its slope, and since the ends of each plate-like body 1 are polymerized, the condensate flows into the adjacent lower plate-like body. without being guided by the body 1 and flowing onto the lower heat exchanger B or into the vessel body.
Guide the drain securely to the drain outlet 3 and connect it to the drain pipe 4.
It is released outside the vessel through the . When the plate-like body 1 is bent into a V-shape as illustrated in FIGS. 4 and 5, the drain gathers in the center of the plate-like body 1
There is no fear of the drain dripping onto the lower heat exchanger B or into the container body than the left and right ends of the plate body 1, and all drain dripping onto the plate-like body 1 can be discharged from the drain outlet 3 provided at the center of one side.

As explained above, this idea consists of a plurality of plate-like bodies in the lower part of the heat exchanger with a certain exhaust gap or exhaust port, the ends of which overlap each other in the horizontal direction, and slope downward toward the exhaust port. With a simple structure in which the drain is disposed in a straight line, the drain can be reliably collected, and the distribution of the flue gas flow is evened out, so the thermal efficiency is significantly improved and the resistance to passage of the flue gas is reduced.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of the entire structure showing an embodiment of this invention, Figs. 2 to 5 are perspective views showing the embodiment of the main part, and Figs. 6 and 7 are schematic cross-sectional views of a conventional example. It is. A... Upper heat exchanger, B... Lower heat exchanger, 1... Plate body, 2... Exhaust gap, 3... Drain port, 1a... Exhaust port.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of plate-like bodies 1 are arranged in the lower part of a heat exchanger with a certain exhaust gap 2 or exhaust port 1a, and their ends are slightly overlapped in the horizontal direction, so that the height of the plate-like bodies 1 is increased. A water heater characterized in that the water heater is arranged so as to be sloped downward sequentially toward a drain port 3 provided on one side of the lower part of the water heater. 2. The water heater according to claim 1 of the utility model registration claim, in which the plurality of plate-like bodies 1 are formed of a single plate.