JPH0247405Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a gas burner-operated heat exchanger device mainly used in hot air heaters.

(Prior Art) The applicant of the present application has previously developed a device of this type, for example, as seen in the utility model registration application dated November 17, 1981, in which the inside of the heat exchanger body is separated from the upper side by an intermediate partition plate. The combustion chamber is divided into a chamber and a lower chamber, and the upper chamber is connected to the outside through an exhaust port that opens to the upper side, and the lower chamber opens to the rear side. The air chamber is connected to the outside via an air supply port and a combustion air fan connected thereto, and at least two burners, one in the front and the other in the rear, are arranged in the upper part of the air chamber and extend longitudinally in the horizontal direction. They are arranged in rows so that each combustion surface faces into the combustion chamber, and secondary air ports consisting of a plurality of horizontal through holes are installed in the partition plate, in front of the front burner and in the rear burner. at least 2 with the rear of
We proposed a type in which the air chambers are installed in parallel in rows, but in this case, the air chambers have the air supply ports on the rear side, and the combustion air is fed under pressure through this. A relatively large amount of combustion hot air is supplied to the rear secondary air port on the upper side, and accordingly, the combustion hot air in the combustion chamber on the upper side flows forward as shown by the dotted line in FIG. The heat exchanger body has the disadvantage that local overheating tends to occur on the upper front wall of the heat exchanger body.

(Problems to be Solved by the Invention) It is an object of the present invention to provide a device that is free from such inconveniences, that is, a device that prevents localized overheating in the upper part of the cross section as much as possible.

(Means) The present invention was made based on such a viewpoint, and the inside of the heat exchanger body is divided into an upper chamber and a lower chamber by an intermediate partition plate, and the upper chamber is divided into an upper chamber and a lower chamber. A combustion chamber that is connected to the outside through an exhaust port that opens on the side of the upper part,
an air supply port opening the lower chamber to the rear side;
The air chamber is connected to the outside via a combustion air fan, and at least two rows of burners extending longitudinally in the horizontal direction are arranged in parallel at the upper part of the air chamber. and each combustion surface faces into the combustion chamber, and furthermore, a secondary air port consisting of a plurality of horizontal through holes is provided in the partition plate in front of the front burner,
In the case where the rear burner is arranged in at least two rows in parallel with the rear burner, the front secondary air opening has a relatively large opening area, and the rear secondary air opening has a relatively small opening. It is formed by the area.

(Example) An example of implementing the present invention will be explained with reference to attached drawings.

The drawing shows a case in which it is applied to a hot air heater. Reference numeral 1 indicates the heater main body, and the main body 1 is equipped with a heat exchanger 2 inside thereof, a hot air fan 3 above it, and a front lower part of the main body 1. The air outlet 4 is equipped with a warm air outlet 4 on the side and an indoor air intake 5 on the upper side of the back.
Now you can get hot air blowing out. In the illustrated example, the heat exchanger 2 has two auxiliary heat exchangers 2a connected to the heat exchanger 2 on the back side thereof in front and rear stages.

As clearly shown in FIGS. 2 to 4, the heat exchanger 2 consists of an outer heat exchanger main body 2b, and the inside thereof is divided into an upper chamber 7 and a lower chamber 8 by an intermediate partition plate 6. The upper chamber 7 is configured as a combustion chamber connected to the exhaust pipe 10a via the exhaust port 9 opening at the rear side of the upper side, and the lower chamber 8 is opened at the rear side surface. The air chamber is connected to the supply cylinder 10b via the opening 11 and the combustion air fan 12 on the back side of the opening 11, and there is also a gas burner extending longitudinally in the upper part of the air chamber 8. The other burners 13 are arranged in at least two rows, the front burner 13a and the rear burner 13b, so that each burner 1
3a, 13b in the combustion chamber 7 with each combustion surface on its upper surface.
Furthermore, a secondary air port 14 consisting of a plurality of horizontal through holes is provided in the partition plate 6 to face the front secondary air port 14a in front of the front burner 13a.
and a rear secondary air port 14b behind the burner 13b on the rear side.

In the illustrated example, the secondary air port 14 is also provided between the burners 13a and 13b.
It was prepared as c.

The above is not particularly different from what was proposed earlier,
In such a device, as described above, the combustion air introduced into the air chamber 8 through the air supply port 9 on the rear side is
A comparatively large amount of combustion hot air in the combustion chamber 7 above is guided to the secondary air port 14 on the side closer to this, that is, the rear secondary air port 14b, as shown by the dotted line in FIG. This tends to lead the body 2b forward, and thus the main body 2b tends to cause local overheating on its front upper wall surface.

The present invention eliminates such inconvenience by forming the rear secondary air port 14b with a relatively small opening area and the front secondary air port 14a with a relatively large opening area. More specifically, for example, as clearly shown in FIG. The secondary air port 14b consists of a large number of so-called small holes with a relatively small opening area arranged in parallel, and as a whole, the front secondary air port 1
4a has a relatively large opening area, and the rear secondary air port 14b has a relatively small opening area.

(Function) To explain its operation, by operating the heat exchanger 2 and operating the hot air fan 3, hot air can be blown out from the hot air outlet 4. This is not particularly different from what was proposed in 2003, but in addition, upon such operation, the air supply port 1 is provided in the air chamber 8.
Combustion air led through the partition plate 6 is led into the combustion chamber 7 above it through the secondary air port 14 formed in the partition plate 6, and this point is also particularly different from the conventional one. However, according to the present invention, as described above, the front secondary air port 14a is configured to have a relatively large opening area, and the rear secondary air port 14b is configured to have a relatively small opening area. Combustion air guided into the air chamber 8 is passed through the front secondary air port 14a.
It does not lead to the above-mentioned disadvantages due to a relatively large amount being guided to the side. In other words, the secondary air introduced into the combustion chamber 7 tends to be regulated into a relatively large amount in front of the burner 3 and a relatively small amount in the rear, and is guided upward. Therefore, there is no disadvantage of the above-mentioned method of guiding the hot air of combustion forward.

(Effect) According to the present invention, the secondary air ports provided in the partition plate are made to have a relatively large opening area in front of the front burner and a relatively small opening area behind the rear burner. Something,
It is possible to eliminate the disadvantage of the above-mentioned proposal in which a relatively large amount of combustion air is guided to the rear secondary air port side, that is, the disadvantage that only the front upper part is overheated,
Its structure is relatively simple and has advantages such as being obtained at low cost.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view of an example of a hot air heater equipped with the device of the present invention, Figs. 2 and 3 are cross-sectional views taken along the - line and - line, and Fig. 4 is a cross-sectional view taken along the - line of Fig. 3. It is a front view. 2... Heat exchanger, 2a... Heat exchanger body, 6...
...Partition plate, 7...Combustion chamber, 8...Air chamber, 9...
Exhaust port, 11... Air supply port, 12... Combustion air fan, 13... Burner, 13a... Front burner, 1
3b... Rear burner, 14... Secondary air port, 14
a...Front secondary air port, 14b...Rear secondary air port.

Claims (1)

[Scope of utility model registration request] The heat exchanger main body is divided into an upper chamber and a lower chamber by an intermediate partition plate, and the upper chamber is connected to the outside through an exhaust port opening on the side surface of the upper side. The lower chamber is structured into an air chamber connected to the outside via an air supply port opening to the rear side surface and a combustion air fan connected to the air supply port, and a horizontal Burners extending longitudinally are arranged in at least two rows, front and rear, so that each combustion surface faces into the combustion chamber, and the partition plate is further provided with secondary air ports consisting of a plurality of horizontal through holes. are arranged in at least two rows, one in front of the front burner and the other in the rear of the rear burner, and the front secondary air port has a relatively large opening area and the rear burner has a relatively large opening area. A heat exchanger device in which the secondary air port is formed with a relatively small opening area.