JPS64536Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a structure that maintains airtightness in gaps between piping connections, wiring, protrusions, etc. and an exterior case of a closed water heater.

Conventionally, this type of airtight structure has been constructed as shown in FIG. That is, the water heater mechanism section 1 is fixed to the exterior case 2, and the gas inlet connection section 1a of the gas control section, which is the piping connection section of the water heater mechanism section 1, the hot water supply pipe connection section 1b provided on the water control section, and A donut-shaped rubber bushing 3 is fitted into the gap between the water supply pipe connection part 1c or the water drain plug 1d, which is a protrusion, and the exterior case 2, and then a fixing plate 4 is inserted to prevent the rubber bushing 3 from slipping, and the fixing plate 4 is screwed with a tapping screw 5. It was fixed to exterior case 2. The structure was as shown in the cross section in Figure 2, and this maintained airtightness.

In this case, the rubber bushings 3 are required as many as the piping connections and protrusions, and other parts for fixing the rubber bushings 3 are also required, and if the piping connections etc. are close to each other, the construction becomes complicated. Furthermore, during installation work, please refer to Figure 3, which is a detailed diagram of Figure 1.
As shown in the figure, it had to be installed from two or more directions, and the workability was poor due to the elasticity of the rubber, and the assembly efficiency could not be said to be good.

Purpose of the invention The present invention eliminates these conventional drawbacks, simplifies the configuration, improves the workability of installation work,
The purpose is to maintain airtight performance.

Structure of the invention In order to achieve this objective, the present invention fills the gaps between piping connections and protrusions with an elastic plate, such as a rubber sheet, from the outside of the outer case to maintain airtightness, and a plate that presses the elastic sheet. The structure is such that it can be easily fixed from one direction with a screw.

With this configuration, airtightness between the piping connection part and the exterior case can be maintained, and even if the piping connection part is complex, it is only necessary to appropriately deform the shape of the elastic sheet and fixing plate. The shape is not complicated and the number of parts can be reduced. Moreover, since it can be installed from all directions, it has the effect of greatly improving work efficiency.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on FIG. 4.

In the figure, when the water heater mechanism 1 is fixed to the exterior case 2, gaps are created between the exterior case 2 and the piping connections, which are the gas inlet connection 1a, the hot water supply pipe connection 1b, the water supply pipe connection 1c, and the drain plug 1d. A cross cut 6b is made in the hole 6a, which is slightly smaller than the shape of the pipe, from the outside of the exterior case 2 to allow for flexibility in position, and three holes are made to match the positions of the piping connections 1a, 1b, and 1c, and one is made to match the drain plug 1d, which is a protrusion.
Then, the rubber sheet 6 with 10 holes is placed over the pipe connection parts 1a, 1b, and 1c.
A fixing plate 7 having holes 7a for receiving the water drain plug 1c and the drain plug 1d is placed over the rubber sheet 6, and the fixing plate 7 together with the rubber sheet 6 is fixed to the exterior case 2 with tapping screws 8. This ensures a sufficient airtight seal.

Next, to explain the installation method with the above configuration, after fixing the water heater mechanism part 1 to the exterior case 2, the respective piping connections 1a, 1 are connected from the bottom surface of the exterior case 2.
b, 1c, a rubber sheet 6 is fitted into the drain plug 1d, and a fixing plate 7 is held over the rubber sheet 6, and the rubber sheet 6 is fixed to the exterior case 2 with tapping screws 8.

In this way, the number of parts is reduced, the structure is simplified, and work can be performed from a single direction.

Effects of the invention As described above, according to the closed combustion device of the invention, the number of parts is reduced by tightly fitting the elastic sheet, which is a thin elastic plate, between the piping connection part and the exterior case and fixing it with the fixing plate. , the effects of simplifying the configuration and improving work efficiency can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the main parts of a conventional closed combustion device, Fig. 2 is a sectional view of the main parts, Fig. 3 is an exploded perspective view of the main parts, and Fig. 4 is an embodiment of the present invention. FIG. 2 is an exploded perspective view of essential parts of the closed combustion device. DESCRIPTION OF SYMBOLS 1...Water boiler mechanism part, 1a...Gas inlet connection part, 1b...Hot water supply pipe connection part, 1c...Water supply pipe connection part, 1d...Drain plug, 2...Exterior case, 5...
Tapping screw, 6...Rubber sheet (elastic sheet), 7...Fixing plate, 8...Tapping screw.

Claims (1)

[Scope of utility model registration request] a gas control unit having a gas inlet connection; a water control unit having a water supply pipe connection and a hot water supply pipe connection;
A heat exchanger section, an air supply/exhaust section, and an exterior case for fixing them, and a plurality of notches that pass through protrusions such as the gas inlet connection section, the hot water supply pipe connection section, the water supply pipe connection section, and the water drain plug. What is claimed is: 1. A closed-type combustion device comprising: an elastic sheet having a hole; a plate that encloses each of the connection parts and protrusions; and a plate that presses the elastic sheet is fixed to an exterior case from one direction.