JPH025304Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to the structure of a hot water storage type hot water can.

[Prior art and its problems] FIG. 5 shows a vertical cross-sectional view of a conventional hot water can body structure. FIG. 6 is a sectional view taken along line A--A in FIG. 5. The structure of this hot water can is as follows.

A heat transfer fin structure 4 is disposed concentrically within a substantially cylindrical combustion chamber 3 separated by an inner wall 2 of the hot water chamber 1 so as to be in heat transfer contact with the inner wall,
Further, a cover member 8 is disposed inside thereof so as to be in heat transfer contact with the heat transfer fin structure.

The bottom of the combustion chamber is filled with a refractory material 9, and the flow of combustion gas 11 heated by a burner 10 installed at the top of the combustion chamber starts downward in the combustion chamber, as shown in FIG. The heat transfer fins flow towards the heat transfer fin structure, but turn around midway and enter the gaps between the heat transfer fin structures. After passing through this gap, the combustion gas 11 collects in a chimney stand 12 placed at the bottom of the hot water can and is exhausted to the outside.

The heat transferred in the above process heats the water 13 supplied into the hot water chamber 1, and the hot water 14
The signal is then supplied to external equipment, etc.

One of the biggest problems with the hot water can having the above structure is the heat resistance and durability of the cover member 8 and the heat transfer fin structure 4. In particular, the upper part of the cover member is closest to the flame extending from the burner 10 and is directly exposed to the combustion gas at about 1200°C.
It is heated to a very high temperature. Therefore, the cover member is deformed and burnt out due to thermal stress and high-temperature strengthening, making it impossible to maintain the desired performance of the hot water can. As a countermeasure to this problem, it is possible to use a material with excellent heat resistance for the cover member and increase the thickness of the cover member in order to obtain the strength to withstand thermal stress, but this is not a sufficient countermeasure and increases costs.

[Purpose and outline of the invention] In order to solve the above-mentioned problems, this invention aims to provide a hot water can body structure that is low cost, easy to manufacture, effective, and has excellent heat resistance and durability. purpose.

That is, in this invention, a heat transfer fin structure is arranged concentrically in a substantially cylindrical combustion chamber separated by an inner wall of a hot water chamber so as to be in heat transfer contact with the inner wall, and A support member of a required height is installed inside the fin structure, and a heat transfer fin protection block made of a refractory material is applied to the tip of the heat transfer fin structure while being supported by the support member. It is characterized by this.

[Embodiments of the invention] This invention will be described below based on embodiments shown in the drawings. FIG. 1 is a longitudinal cross-sectional view of an embodiment of the hot water can body structure of this invention, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1.

A hot water chamber 1 composed of an upper cover plate 15, a lower cover plate 16, an outer wall 17, and an inner wall 2 is equipped with a water supply inlet socket 18 and a hot water outlet socket 19, and inside the hot water chamber there are filled with water.
However, the mounting positions of the two sockets 18 and 19 are not necessarily limited to the positions shown in the drawings.

A heat transfer fin structure 4 is disposed concentrically within a substantially cylindrical combustion chamber 3 delimited by an inner wall 2 of the hot water chamber 1 so as to be in heat transfer contact with the inner wall. The heat transfer fin structure 4 may be a corrugated fin, a steel pipe, a square pipe, etc. as shown in FIGS. 3A, 3B, 3C, and 3D. It is more effective for heat transfer if the corrugated fins are shifted by half a pitch as shown in Figure 3A.

Further, a support member 5 of a required height is installed inside the heat transfer fin structure 4, and the heat transfer fin protection block 6 made of a fireproof material is supported by the support member 5. It is applied to the upper part of the fin structure 4 on the combustion chamber 3 side. The support member has a substantially cylindrical shape and is made of a heat-resistant material with excellent thermal conductivity, and is disposed in substantially contact with or in contact with the heat transfer fin structure 4, and protects the heat transfer fin. Preferably, the upper end of the block is located above the upper end of the heat transfer fin structure.

The heat transfer fin protection block 6 may be formed by being divided into several arcuate block portions 7 for ease of construction, and an example of the arcuate block portion divided into four parts is shown in FIG. . However, these block portions are configured to form a substantially single cylindrical body when in contact with the heat transfer fin structure 4. Moreover, it is desirable that the gaps between each of the above-mentioned 7 be filled with a heat-resistant material and closed.

The bottom of the combustion chamber 3 is filled with a refractory material 9, and the flow of combustion gas 11 heated by a burner 10 installed at the top of the combustion chamber is directed within the combustion chamber as shown in FIG. Initially, it flows downward, but halfway through, it reverses and enters the gap between the heat transfer fin structures 4. After passing through this gap, the combustion gas 11 gathers in the chimney stand 12 placed at the bottom of the hot water can,
Exhausted to the outside.

In the above process, the water 13 supplied to the hot water chamber 1 from the socket 18 is heated by the heat transferred from the radiant heat transfer in the inner wall 2 and the convection heat transfer in the heat transfer fin structure 4, and becomes hot water 14. , and are supplied to external equipment etc. from the socket 19.

[Effects of the invention] This invention has the structure described above, and protects the upper part and support member of the heat transfer fin structure, which is susceptible to thermal deformation and burnout, from high-temperature combustion gas by a protective block made of a fireproof material. The durability is dramatically improved and the desired performance of the hot water can can be maintained. Furthermore, by arranging the upper end of the heat transfer fin protection block above the upper end of the heat transfer fin structure, radiation heat transfer to the tip of the heat transfer fin structure, which is exposed to severe conditions for durability, is prevented. The life of the heat transfer fin structure can be extended. In addition, fireproofing material has the advantage of being easily molded into a desired shape, and if the protective block is molded in sections, the work at the time of construction is easy. The outer diameter of the protective block can be adjusted by adjusting the amount of heat-resistant material filled between each divided arcuate block.

Furthermore, with the structure of this invention, it is sufficient that the materials of the heat transfer fin structure and the supporting member have a certain degree of heat resistance, and there is no need to increase the strength by increasing the plate thickness, and the cost is low. It's over.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the hot water can body structure in this invention, and FIG.
It is a sectional view on a line. Figure 3 A, B, H, D are
This is an embodiment of the heat transfer fin structure in the hot water can structure of this invention, and FIG. 4 is an example of the arcuate block portion of the heat transfer fin protection block in the hot water can structure of this invention. FIG. 5 is a longitudinal cross-sectional view of a conventional hot water can body structure, and FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5. 1...Hot water chamber, 2...Inner wall, 3...Combustion chamber, 4
... Heat transfer fin structure, 5 ... Support member, 6 ...
Heat transfer fin protection block, 7... arcuate block portion.

Claims (1)

[Claims for Utility Model Registration] (1) A heat transfer fin structure 4 is provided in a substantially cylindrical combustion chamber 3 separated by an inner wall 2 of a hot water chamber 1 so as to be in heat transfer contact with the inner wall. are arranged concentrically, a support member 5 of a required height is installed inside this heat transfer fin structure, and a heat transfer fin protection block 6 made of a refractory material is supported by the support member 5. A hot water can body structure characterized in that the heat transfer fin structure 4 is applied to the tip end thereof. (2) The heat transfer fin protection block 6 is formed of several arcuate block portions 7, and when these block portions are applied to the heat transfer fin structure 4, it becomes a substantially single cylindrical body. The hot water can body structure according to claim 1 of the utility model registration, characterized in that it is configured so that: (3) Utility model registration claim 1, characterized in that the support member 5 has a substantially cylindrical shape and is arranged to substantially contact or be in contact with the heat transfer fin structure 4. The hot water tank structure described in section. (4) Utility model registration claim 1, characterized in that the upper end of the heat transfer fin protection block is located above the upper end of the heat transfer fin structure.
Hot water can body structure according to item 1 or 2. (5) The hot water can body structure according to claim 2, wherein the gap between each of the arcuate block portions 7 is filled with a heat-resistant material. (6) The hot water can body structure according to claim 1 or 2, wherein the heat transfer fin structure 4 is formed of corrugated fins, steel pipes, square pipes, etc. .