JPS6333087Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a hot water boiler, particularly a domestic hot water boiler.

(Prior art) Conventionally, this type of hot water boiler has a water jacket formed on the peripheral wall of a vertical cylindrical can body, and burns using a burner that penetrates the water jacket and faces the inside of the can body at the bottom of the can body. This heats the water inside the water jacket, and the inner wall of the water jacket is usually made with many annular concave and convex parts along the circumferential direction of the wall to increase the strength of the wall. It is formed into a plate shape.

In addition, hot water boilers allow combustion gas to pass along the inner wall of the water jacket at high speed, thereby thinning the film on the inner wall surface of the water jacket to improve heat transfer efficiency, and reducing the influence of outside air on the combustion chamber for ignition. In order to stabilize the combustion state, it is common to provide a baffle inside the can, specifically above the combustion chamber formed at the bottom of the can.

There are various structures for the above-mentioned buttful, and a typical example includes a plurality of disc-shaped buttful plates stacked vertically with appropriate spacing between them. No special consideration is given to the relationship between the position of the plate and the unevenness of the water jacket.

On the other hand, in order to allow the high temperature combustion gas to come into contact with the inner wall of the water jacket as much as possible and to improve the efficiency of heat exchange, it is desirable for the baffle plate to have its peripheral edge close to the inner wall of the water jacket.
If they are placed too close together, ventilation resistance will become too large, inhibiting the rise of combustion gas and adversely affecting combustion.

Therefore, in a conventional hot water boiler in which there are a mixture of buff-full plates whose peripheral edges correspond to the convex portions of the inner wall of the water jacket and buff-full plates whose circumferential edges correspond to the concave portions, the best results in terms of heat exchange efficiency and ventilation resistance are obtained. It was difficult.

That is, if the peripheral edge of the buffful plate is placed close to the inner wall of the water jacket in an attempt to increase heat exchange efficiency, the resistance of the peripheral edge of the buffful plate at the portion corresponding to the convex portion of the inner wall of the water jacket that bulges outward from the jacket becomes too large, and vice versa. In order to reduce the ventilation resistance, if the distance between the peripheral edge of the baffle plate and the inner wall of the water jacket is increased, the combustion gas will not come into contact with the inner wall of the water jacket at the portion where the circumferential edge of the baffle plate corresponds to the concave part of the inner wall of the water jacket that is recessed into the inside of the jacket. As a result, the heat exchange efficiency decreases.

(Problem to be Solved by the Invention) The problem to be solved by the invention is to provide a space between the buffer plate and the inner wall of the water jacket that allows combustion gas to rise smoothly, and to pass through that space. The purpose is to allow the rising combustion gas to flow while contacting the inner wall of the water jacket, and also to absorb the combustion sound in the burner.

(Means for solving the problem) The technical means taken by the present invention to solve the above problem is to provide a large number of annular recesses along the circumferential direction of the inner wall surface of the water jacket formed on the peripheral wall. In a hot water boiler comprising a can body and a buttful provided in the can body and having a plurality of buttful plates stacked vertically at appropriate intervals, the buttful has a wall between the top several plates. In addition to providing a heat insulating material, the periphery of each buffle plate is made to correspond to the recessed portion of the inner wall surface of the water jacket, and a notch is provided in the periphery of each buffle plate.

(Function) The peripheral edge of each buttful plate corresponds to the recess on the inner wall of the water jacket, and since the peripheral edge is provided with a notch, there is no airflow resistance between the buttful plate and the inner wall of the water jacket. While the combustion gas rising from the combustion chamber passes through the buff-full plate part, it passes around the buff-full plate periphery and enters the concave part of the inner wall of the water jacket. come into contact with.

Moreover, in the upper part of the baffle, the flow of combustion gas that tends to leave the inner wall of the water jacket is forced by the heat insulating material, so that the state in which the combustion gas rises while contacting the inner wall surface of the water jacket is maintained even in the upper part of the can body.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the figure, A indicates a can body, which has the shape of an upright cylinder with an open top surface, and a water jacket 1 is formed on the peripheral wall portion over the entire circumference and length.

A top plate 7 having an exhaust pipe 6 is removably provided at the opening on the top of the can body A, and a buttful B is attached to the bottom surface of the top plate 7.

The inner lower part of the can body A is a combustion chamber 8, and a gun-type burner 9, which is provided through the peripheral wall of the can body A, that is, through the water jacket 1, faces the combustion chamber 8. The baffle B is arranged above the combustion chamber 8.

The water jacket 1 has a plurality of annular recesses 3, which are recessed inwardly of the jacket 1 along the circumferential direction of the inner wall 2, continuous in the axial direction.

That is, the inner wall 2 of the water jacket 1 is formed in the shape of a corrugated plate in which a large number of recesses 3 and protrusions 10 are formed in the circumferential direction of the surface and alternately continue in the vertical direction.

Further, the water jacket 1 is provided with a water supply port 11 in the axial direction, that is, in the vertical direction, and a water outlet 12 in the upper part thereof, which are opened to the outside of the can body A.

The buttful B has a large number of buttful plates 4 mounted vertically and parallel to each other at appropriate intervals to a hanging fitting 13 installed vertically on the upper surface plate 7 of the can body A, and the upper two to several buttful plates 4 are attached to each other. A heat insulating material 14 is interposed therebetween.

The baffle plate 4 is a convex portion 1 on the inner wall 2 of the water jacket 1.
It is formed into a disc shape with a slightly smaller diameter than the inner diameter of 0, and a notch 5 is formed at the peripheral edge.

A plurality of notches 5 are provided at equal intervals along the peripheral edge of the full plate 4. In the illustrated example, the notch 5 is 3
They are provided at different locations, each extending at an angle of 55 degrees.

The baffle plate 4 is suspended from the top plate 7 by fixing a plurality of peripheral edges other than the notch 5 to the hanging fittings 13,
Each peripheral edge corresponds to the center of the recess 3 in the inner wall 2 of the water jacket 1.

The heat insulating material 14 is made of rock wool or the like and has a substantially circular cross section, a diameter smaller than that of the baffle plates 4, and a height that allows close contact between the buffle plates 4.

(Effects of the invention) Since the present invention has the above configuration, it has the following advantages.

(1) The periphery of the buff-full plate corresponds to the recess in the inner wall of the water jacket, so when the combustion gas that rises and collides with the buff-ful plate goes around the periphery of the buff-ful plate and flows upward, it moves along the recess and hits the inner wall of the water jacket. It flows like a lick and makes sure to contact the inner wall of the water jacket. Therefore, heat exchange is performed efficiently.

(2) Since the circumferential edge of the buff-full plate corresponds to the concave portion of the inner wall of the water jacket, even if the diameter of the buff-full plate is formed close to the inner diameter of the convex portion of the inner wall of the water jacket, there is a gap between the circumferential edge of the buff-full plate and the bottom of the concave portion. Since there is a space at least equal to the depth of the recess, and a notch is provided at the peripheral edge of the buttful plate, passage of combustion gas is not obstructed, and therefore ventilation resistance does not increase. It has no negative effect on combustion.

(3) In the upper part of the can, the heat insulating material can prevent the combustion gas from leaving the inner wall of the water jacket, so the effect of bringing the combustion gas into contact with the inner wall of the water jacket is even greater.
Heat transfer efficiency to the water jacket at the top of the can is improved.

(4) Since the heat insulating material is provided above the buttful, combustion noise can be absorbed by the heat insulating material, providing a soundproofing effect, and by providing it only at the top, it is possible to protect the heat insulating material, which has low heat resistance. The durability of the entire Batsuful can be improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a hot water boiler showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line -- in FIG. In addition, in the figure, A...Can body, B...Bassful, 1...
...Water jacket, 2...Inner wall, 3...Recess, 4...
...Full plate, 5...Notch, 14...Insulating material.

Claims (1)

[Scope of utility model registration request] A can body having a number of annular recesses that are recessed into the inner wall of the water jacket along the circumferential direction of the surface on the inner wall surface of the water jacket formed on the peripheral wall, and a plurality of can bodies stacked vertically at appropriate intervals from each other. In a hot water boiler equipped with a buttful which has two buttful plates and is installed inside the can body, the buttfull has a heat insulating material between the top several plates, and the periphery of the buttful plates is connected to the upper part of the inner wall surface of the water jacket. A hot water boiler that corresponds to the recess and has a notch on the periphery of each buttful plate.