JPH01312316A - Exhaust air device for burner - Google Patents

Abstract

PURPOSE:To prevent the penetration of rain water and hence eliminate the generation of rain-induced accidental fire or ignition failure by installing an exhaust passage which leads to an exhaust port to the bottom of a top plate which comprises said passage so that it may be positioned directly over a rain water discharge plate, bending its lower end downward and bending its front end downward as well. CONSTITUTION:A rain water prevention plate 13 is installed within a burner device main body 20 so that it may be located directly behind an ignition grill 12. The lower end of a rain water drain plate 14 is connected with the lower end of an exhaust port 11 while its upper end is placed upward and curved gradually so that it may face the exhaust port 11 except for its upper end. The rain water exhaust plate 14 guides the rain water, which collides with the exhaust grill 12 or the rain water penetra tion prevention plate 13 and drops, to the exhaust port and prevents the penetration of rain water itself. This construction guides the rain water to a passage denoted by the arrow 17 or 18. The rain water adhered to a tip plate 15 or a rain water drop plate 16 is removed by a front end 16b of the rain water drop plate 16 advance behind the burner apparatus main body 20 going down along the top plate or the rain water drop plate. As a result, the rain water drops on the rain water discharge plate 14 and is discharged outside from the exhaust port 11.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an exhaust system for a water heater or the like that obtains a heat source by burning fuel such as gas or oil.

BACKGROUND OF THE INVENTION In recent years, this type of water heater has become mainstream to be installed outdoors, and is required to operate normally even under adverse weather conditions such as strong winds and heavy rain.

Hereinafter, an example of the above-mentioned conventional exhaust device for a water heater will be described with reference to the drawings.

FIG. 3 shows a longitudinal sectional view of the exhaust device section of a conventional gas water heater.

1 is an exhaust port, and 2 is an exhaust grill provided inside the exhaust port 1, which separates the exhaust port 1 into three stages (top, middle, and bottom) to prevent small birds from entering. 3 is a rainwater intrusion prevention plate located immediately behind the exhaust grill 2 and installed inside the combustion appliance body 9; 4 is a rainwater intrusion prevention plate that collides with the exhaust grille 2 and the rainwater intrusion prevention plate 3 and directs the rainwater to the exhaust port 1.
This is a rainwater discharge plate that allows rainwater to be discharged more efficiently and also prevents rainwater from entering.One end of the plate is attached to the lower end of the exhaust port 1, and the other end is gradually curved upward, so that almost the entire length of the plate is opposite to the exhaust port 1. . 5 is a top plate that forms part of the exhaust passage;
6 is a heat exchanger for exchanging heat between water and combustion exhaust gas.

Problems to be Solved by the Invention However, in the above configuration, arrows 7 and 8 in FIG.
In many cases, rainwater adheres to the bottom surface of the top plate 5 due to the path of Rainwater drips on the underside of the top plate 5 and travels backwards, eventually falling and wetting the heat exchanger 6 and the gas burner (not shown) below it, which can cause the gas burner to misfire or not ignite. had.

In view of the above-mentioned problems, the present invention provides an air-conditioning device such as a water heater that prevents rainwater from entering and prevents misfires and misfires caused by rain.

Means for Solving the Problems In order to solve the above problems, an exhaust system for a combustor according to the present invention is provided with a rear end located directly above a rainwater drain plate on the lower surface of a top plate constituting an exhaust passage leading to an exhaust port. The roof is bent downward, and the front end is also fitted with a rainwater drop plate that is curved downward.

Effect: With the above-described configuration, the present invention allows rainwater that enters from the exhaust port, hits the rainwater discharge plate, bounces off the top plate, and falls onto the rainwater discharge plate at the rainwater drop plate, thereby preventing the rainwater from flowing into the combustion appliance main body. Prevent intrusion.

Embodiment Hereinafter, an exhaust system in which an embodiment of the present invention is applied to a water heater will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of an exhaust port portion of a gas water heater according to an embodiment of the present invention. In FIG. 1, 11 is a horizontally elongated exhaust port provided at the upper front of the combustion appliance main body 20, 12 is an exhaust grill provided within the exhaust port 11, and 13 is located immediately behind the exhaust grill 12, and 13 is a horizontally elongated exhaust port provided at the upper front of the combustion appliance main body 20. Rainwater intrusion prevention board installed inside 20,
Reference numeral 14 denotes a rainwater drainage plate, whose lower end is connected to the lower end of the exhaust port 11, and whose upper end is gradually curved upward to face the exhaust port 11, except for the upper part. and exhaust grill 12
The rainwater that collides with the rainwater intrusion prevention plate 13 and falls is discharged from the exhaust port 1.
1 to prevent rainwater from entering. 15 is a top plate that forms an exhaust passage of the combustion appliance main body 20. On the lower surface of this top plate 15, there is a bead-shaped protrusion 16m located directly above the rainwater drain plate 14, with a rear end bent downward and having approximately the same length as the horizontal length of the exhaust port 11. The portion 16b is also made by spot welding the rainwater falling plate 16 which curves downward.

In the water heater exhaust system configured as described above, the first
Rainwater that has entered through the arrow 17 in the figure or the 1st route and has adhered to the top plate 15 or the rainwater drop plate 16 will not be able to travel to the rear of the combustion appliance main body 20 through the rainwater fall plate 16.
The rainwater is drained by the front end 15b and the protrusion 16a, and falls onto the rainwater discharge plate 14, and is discharged from the exhaust port 11 to the outside of the appliance.

In the above embodiment, the rainwater falling plate 16 has a protrusion 1 at the rear end.
6a, the rear end 19a may be bent downward like the rainwater falling plate 19 shown in FIG. Further, although the protrusion 16a is spot welded as a separate part, it may be attached directly to the top plate 15.

Effects of the Invention As described above, the present invention provides a rainwater drop plate on the lower surface of the top plate, and the rainwater drained by this plate is received by the rainwater discharge plate below, and is then guided to the lower end of the exhaust port and discharged. Rainwater that bounces off the exhaust plate and exhaust grille and adheres to the back surface of the top plate can be prevented from entering the appliance body, and a combustion machine that is free from misfires and misfires can be provided.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of an exhaust system of a water heater employing an embodiment of the present invention, Fig. 2 is a cross-sectional view of a rainwater drop plate of the second embodiment, and Fig. 3 is a cross-sectional view of a conventional water heater. FIG. 3 is a longitudinal cross-sectional view of the exhaust port device. 11...Exhaust port, 12...Exhaust grill, 13...Rainwater intrusion prevention plate, 14...
Rainwater drainage board, 1...Top plate, 16...
Rainwater falling board. Name of agent: Patent attorney Toshio Nakao / /
-----TFI mouth Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] an exhaust grill provided at the exhaust port of the combustion appliance main body; a rainwater intrusion prevention plate facing the exhaust port behind the exhaust grill;
A rainwater drain plate having a lower end connected to the exhaust port and curved upward as it goes rearward, and located directly above the rainwater drain plate on the lower surface of the top plate constituting the exhaust passage of the combustion appliance main body. , a combustion engine exhaust system equipped with a rainwater drop plate whose rear end is bent downward and whose front end is also bent downward.