JPH0351660Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hot air heater, and more particularly to a chamber connection structure in one equipped with a heat exchanger composed of a plurality of clamshell type chambers.

(Conventional technology) Conventionally, such a chamber type heat exchanger,
For example, as disclosed in U.S. Pat. No. 4,537,178,
A plurality of clam shell type chambers, each consisting of two shells, are arranged in parallel in the casing of a warm air heater, and the air supplied into the casing is heat exchanged with the combustion gas supplied into the chambers. A device that heats the air and blows it into the room is known.

(Problem that the invention attempts to solve) By the way, when connecting chambers arranged in parallel to each other in such a way, the connection structure is such that even if the chambers receive heat load from the combustion gas, the sealing performance of the combustion gas is reduced due to thermal strain. It is desirable that the heat exchanger not have any damage to it or reduce the rigidity of the heat exchanger. In addition, in a heat exchanger in which multiple chambers are interconnected in this way, if a large-capacity heat exchanger can be created by additionally adding chambers and interconnecting them, it is possible to create a heat exchanger with a large capacity. It becomes possible to share a chamber in the heat exchanger, and the productivity of the heat exchanger can be improved.

The present invention was developed in view of the above, and its purpose is to arrange a plurality of clamshell type chambers in parallel and communicate with each other by using the same flange fastening structure. The object of the present invention is to connect the chambers to each other with good sealing performance and firmly while improving the productivity of the heat exchanger.

(Means for Solving the Problems) In order to achieve the above object, the present invention communicates the chambers with each other via a communicating pipe section provided integrally with the shell, and a connecting flange provided on the communicating pipe section. The connection is made by fastening the parts.

Specifically, the solution taken by the present invention is as shown in FIGS. 1 and 2, in the casing 1,
A plurality of clam shell type chambers 12, 13 each consisting of two shells 12a, 12b...
A heat exchanger 5 is disposed in which the air supplied into the casing 1 is heated by heat exchange with the combustion gas supplied into the chambers 12, 13, etc., and the air is heated indoors. The target is a warm air heater that blows hot air. Then, two shells 12a..., 12b of each chamber 12...
The first opening 12c... and the second opening 12d
... are respectively provided, and a communicating tube portion 20 is provided on the opening edge of the first opening 12c, which rises from the opening edge in a step-like manner and whose tip end fits into the second opening 13d of the other chamber 13 facing the other chamber 13. At the same time, the second chamber 13 of the other chamber 13 is attached to the stepped portion of the communication pipe portion 20.
The structure is such that a connecting flange portion 23 is formed in contact with and fastened to the shell 13b around the opening 13d.

(Function) With the above configuration, in the present invention, the chamber 12
The combustion gas supplied into the chamber is supplied to the other chambers 13 via the communication pipe section 20, and the combustion gas is supplied to each chamber 12,
13..., the air flowing outside the chambers 12, 13... is heated by heat exchange with the combustion gas and blown into the chamber.

In that case, the connecting flange portion 23 of the communication pipe portion 20 is fastened by contacting the shell 13b around the second opening 13d of the other chamber 13, so even if the chambers 12, 13 receive a thermal load from the combustion gas, The sealing performance of the combustion gas between the two parts is ensured.

Furthermore, by fastening the connecting flange portion 23 with screws or the like, the chambers 12 and 13 are firmly connected to each other at multiple locations on the outer circumferential side of the communicating pipe portion 20, so that the rigidity of the heat exchanger 5 is improved. ,
The chambers 12 and 13 are not twisted together due to thermal load.

Furthermore, since the connection structure between each chamber 12, 13... is the same, additional chambers 13 can be easily installed, making it possible to use the same chamber 13 in various heat exchangers with different amounts of heat dissipation. Productivity of equipment is improved.

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

3 to 5 show a hot air heater according to an embodiment of the present invention, in which 1 is a casing, and a suction grill 3 is provided at the lower part of the front surface of the casing 1 to draw indoor air into the casing 1. A main suction port 2 is provided to introduce the inside of the casing 1.
At the lower end of the front surface, there is an auxiliary suction port 4 that opens forward and on both sides to introduce indoor air into the casing 1.
is provided. In addition, inside the casing 1,
A blower fan (not shown) that sends the air sucked in from the main suction port 2 and the auxiliary suction port 4 to the upper part of the casing 1, and a heat exchanger 5 that is disposed above the blower fan and heats the sucked air. and are provided. Furthermore, in the upper part of the front of the casing 1,
A blowout outlet 6 is provided which has a blowout grille 7 and blows out the air heated by the heat exchanger 5 into the room as warm air.

The heat exchanger 5 has a meandering exhaust passage 8, one end of which has a cylindrical combustion tube 9 with a built-in burner for burning kerosene, gas, etc.
The other end is connected to the exhaust pipe 1.
The casing 1 is opened to the outside through the casing 1.
The air inside the burner is heated by exchanging heat with the combustion gas from the burner.

Furthermore, the heat exchanger 5 is shown in FIGS. 1 and 2.
As shown in the figure, two shells 11 each have an oval shape.
It is constituted by a plurality of clamshell type chambers 11, 12... formed by joining chambers 11, 11b... at their peripheral edges. That is, the first chamber 12 , the second chamber 13 , and the third chamber 14 are arranged opposite to each other and are connected to each other to constitute the main heat exchange section 16 , and the suction chamber that connects the first chamber 12 to the combustion cylinder 9 . Chamber 11 and the third
It consists of an exhaust chamber 15 that communicates and connects the chamber 14 to the exhaust pipe 10, and these chambers 11-
The space inside 15 constitutes an exhaust passage 8.

One shell 11b of the suction chamber 11 is provided with two second openings 11d, 11d closed by a blind plate 17, and the other shell 11a is provided with a first opening connected to the combustion tube 9. An opening 11c and a first opening 11c for discharging exhaust gas from the suction chamber 11 are provided. Further, one shell 12b of the first chamber 12 is provided with a second opening 12d connected to the first opening 11c of the suction chamber 11 and a second opening 12d closed by a blind plate 18. At the same time, the other shell 12a is provided with two first openings 12c, 12c for discharging the exhaust gas separated by the first chamber 12. Further, one shell 13b of the second chamber 13 has the first opening 12 of the first chamber 12.
second openings 13 connected to c and 12c, respectively;
d and 13d, and the other shell 13a is provided with a first opening 13c for discharging the exhaust gases that have been combined in the second chamber 13. Further, one shell 14b of the third chamber 14 has the first opening 13 of the second chamber 13.
A second opening 14a connected to the third shell 14a and a second opening 14d closed by a blind plate 19 are provided in the other shell 14a.
Exhaust gas separated by chamber 14 2
Two first openings 14c, 14c are provided. Furthermore, one shell 1 of the discharge chamber 15
5b includes a first opening 14c of the third chamber 14,
Second openings 15d and 1 respectively connected to 14c
5d and the other shell 1
5 a is provided with a first opening 15 c for discharging the exhaust gases that have been combined in the exhaust chamber 15 , and the first opening 15 c is connected to the exhaust pipe 10 .

Next, the connection structure of each of the chambers 11 to 15 will be explained based on FIG. 2, taking the case between the first chamber 12 and the second chamber 13 as an example. A communication pipe portion 20 is provided at the opening edge of the first opening 12c of the first chamber 12, rising from the opening edge in a step-like manner. A step portion 21 is formed in the middle of the communication tube portion 20 so that its diameter becomes smaller, and a second opening of another opposing chamber (second chamber 13) is formed at the tip side of the step portion 21. A fitting portion 22 is formed to fit into the portion 13d. A connecting flange portion 23 that comes into contact with the shell 13b around the second opening 13d of the other chamber (second chamber 13) is formed in the stepped portion 21 of the communicating tube portion 20. The portion 23 is provided with screw holes at equal intervals in the circumferential direction, and the screws 25 inserted through the screw holes are inserted into another chamber (the third chamber).
By tightening into the shell 13b of the chamber 13), the connecting flange portion 23 is fastened to the shell 13b via the seal member 24, and the chambers 12, 13 are tightened.
are connected to each other.

Therefore, according to the above-mentioned embodiment, the connecting flange portion 23 abuts and is fastened to the shells 12b to 15b around the second openings 12d to 15d of the other chambers 12 to 15 via the seal member 24. ,
Chamber 11-1 even when subjected to heat load from combustion gas
The sealing property of the combustion gas between 5 and 5 is ensured.

Further, the connection flange portion 23 is connected to the shells 12b to 1 of the other chambers 12 to 15 by a plurality of screws 25.
5b, so chambers 11-1
Since the heat exchanger 5 is firmly connected to each other and the rigidity of the heat exchanger 5 is improved, problems such as the chambers 11 to 15 being twisted together can be prevented even when subjected to heat load from the combustion gas.

Further, since the chambers 11 to 15 are connected with the same connection structure using the connection flange 23, a new second chamber 13 and a third chamber 1 are added between the third chamber 14 and the discharge chamber 15.
Since the capacity of the main heat exchange section 16 can be easily increased by alternately adding the required number of chambers 13 and 14, it is possible to use the chambers 13 and 14 in common in various heat exchangers 5 with different amounts of heat radiation. Therefore, the productivity of the heat exchanger 5 can be improved.

(Effects of the invention) As explained above, according to the hot air heater of the invention, the first opening and the second opening are provided in the two shells of the clam shell type chambers arranged side by side, respectively, The communication pipe part raised in a step shape from the opening edge of the first opening part is fitted into the second opening part of the other chamber facing the other chamber, and the connecting flange part formed in the step part is inserted into the second opening part of the other chamber.
Since the structure is such that it is fastened by contacting the shell around the opening, it is possible to improve the productivity of the heat exchanger by making the chambers common, while the flange fastening structure improves the sealing performance of combustion gas between the chambers under heat load. This makes it possible to effectively improve the heat exchanger and the rigidity of the heat exchanger.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a sectional view showing the connection structure of the chamber, Fig. 2 is a vertical sectional front view showing the chamber alone, Fig. 3 is a front view of the hot air heater, and Fig. 4. is a side view of the same, and FIG. 5 is an enlarged longitudinal sectional side view of the same essential parts. 1...Casing, 5...Heat exchanger, 12...
First chamber, 12a, 12b, 13b...Ciel, 12c...First opening, 12d, 13d...
Second opening portion, 13... Second chamber, 20... Communication pipe portion, 21... Step portion, 22... Fitting portion, 23
...Connection flange.

Claims (1)

[Scope of utility model registration request] Inside the casing 1, two shells 12a,
A heat exchanger 5 is disposed in which a plurality of clam shell type chambers 12, 13, .
13... A warm air heater that heats the air by exchanging heat with the combustion gas supplied in the chamber and blows it into the room, and the two shells 12a of each of the chambers 12...
..., 12b... have a first opening 12c... and a second opening 12c...
Openings 12d... are provided respectively, and the opening edges of the first openings 12c... stand up in a stepped shape from the opening edges, and the tip ends of the second openings of the other chambers 13 facing each other are provided.
A communication tube portion 20 that fits into the opening 13d is provided, and a connection that is fastened by contacting the shell 13b around the second opening 13d of the other chamber 13 is provided at the stepped portion of the communication tube portion 20. A hot air heater characterized in that a flange portion 23 is formed.