JPS596360Y2 - hot air heater - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot air heater equipped with a circulation fan for obtaining hot air.

FIG. 1 shows a simplified version of the hot air heater that has been known in the past, for example, in Japanese Utility Model Publication No. 53-5383.

In Figure 1, 1 is the supply/exhaust top, 2 is the air supply path, 3 is the combustion fan, 4 is the burner, 5 is the combustion chamber, 6 is the heat exchanger, and 7
8 is an exhaust path, 8 is a circulation fan, 10 is a main body, and 11 is a hot air outlet.

In the hot air heater configured as described above, the air necessary for combustion is sucked in from the top of the supply and exhaust section by the combustion fan 3, passes through the air supply path 2, and is provided for combustion in the burner 4 section. After that, it becomes high-temperature exhaust gas, which passes through the heat exchanger 6 and the exhaust path 7 and is sent outside again.

The high-temperature air that has been heat-exchanged near the outer surfaces of the combustion chamber 5 and the heat exchanger 6, which are kept at a high temperature, is circulated through a hot air outlet by a circulation fan 8 disposed in a vertical plane parallel to the heat exchanger 6. 11 to discharge into the room for heating.

However, if you set up like this, the circulation fan (
(including the motor) protrudes outside the main body 10, which increases the depth of the device and increases the overall size of the device, which has the disadvantage of becoming an obstacle when installed in a living space with limited space. Ta.

Therefore, the technical problem of the present invention is to prevent the circulation fan from protruding outside the main body, and the technical means of the present invention to solve this technical problem is to use a circulation fan that blows air in the outer circumferential direction, A plurality of heat exchangers are arranged to surround this circulation fan, and the surface surrounding the circulation fan of each heat exchanger is curved to form a fan casing, and a discharge port is provided between each heat exchanger. With the above structure, the circulation fan is located inside the heat exchanger, so the circulation fan does not protrude outside the main body, making it possible to downsize the device.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIGS. 2 and 3 show a hot air heater according to an embodiment of the present invention.

Here, 3 is a combustion fan, 4 is a burner, 5 is a combustion chamber, 61
, 62, 63, and 65 are heat exchangers; 64 is a connecting pipe connecting the heat exchangers 61, 62, and 63, 65; 8 is a circulation fan that blows air in the outer circumferential direction; 91 is a fan casing passage;
92 is a heat exchanger 61 and 65. 65 and 62. 62 and 6
5. A discharge port provided between 65 and 61, 10 is a main body,
11 is a hot air outlet of the main body 10, and 12 is an inlet.

The structure described above differs from the conventional example shown in FIG. 1 mainly in the following points.

That is, the circulation fan 81 is connected to a plurality of heat exchangers 61,
Surrounded by 62, 63, 65, heat exchangers 61, 62, 6
3.65, and arranged in substantially the same vertical plane as the heat exchanger 6.
The fan casings 611, 621 of the circulation fan 8 are formed by curving the surface surrounding the circulation fan 8 of 1.62 mm, and the discharge port 92 is provided.

Therefore, in the warm air heater of this embodiment, the flow of the air sent out by the circulation fan 8 will be explained as follows.

That is, the indoor air sucked in from the suction port 12 passes through the blade passage 82 from the circulation fan impeller inlet 81 and is discharged toward the outer circumference, and smoothly flows inside the casing passage 91 along the fan casings 611 and 621. The hot air then reaches the discharge port 92 and is finally sent out and circulated indoors from the hot air outlet 11.

As a result, the following effects can be obtained in the hot air heater of this embodiment.

(1) First, the circulation fan 8 is connected to the heat exchanger 61, 62, 6
Since it is housed in the same plane as the 3.65, the depth dimension can be shortened and the equipment can be made smaller compared to conventional hot air heaters, making the living space more spacious and more effective.

(2) Next, the wind induced by the circulation fan 8 is applied to the burner 4.
, the contact area with the heat exchangers 61, 62, 63, and 65 is larger than that of conventional warm air heaters, allowing effective heat exchange, improving heat exchange efficiency compared to conventional examples. can be done.

Therefore, it also has the effect that a heat exchanger with a smaller volume than the conventional one is required to exhibit the same heat exchange efficiency performance as the conventional one.

(3) Furthermore, since the main load on the circulation fan 8 is the connecting pipe 64 provided at the discharge port 64, compared to a hot air heater with a conventional structure in which the air blows over a wide area of the heat exchanger. Therefore, the load on the circulation fan 8 can be reduced.

Therefore, while achieving the same performance, the size and rotation speed can be reduced compared to conventional circulation fans.

Also, as mentioned above, since the load on the circulation fan 8 is reduced, the noise of the circulation fan 8 itself is reduced, of course.
This has a great effect in terms of noise reduction, as secondary air noise generated by wind hitting the large areas of the burner 4 and heat exchangers 61, 62, 63, and 65 is almost eliminated.

As described above, in the present invention, a plurality of heat exchangers are arranged so as to surround a circulation fan that blows air in the outer circumferential direction, and the fan casing is shaped by curving the surface surrounding the circulation fan of each heat exchanger. In addition, since a discharge port is provided between each heat exchanger, it not only solves the technical problem, but also allows the fan casing to be shaped by curving the surface surrounding the circulation fan of each heat exchanger. Air flows smoothly along the fan casing surface, increasing heat exchange efficiency and eliminating noise caused by turbulence.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the structure of a conventional hot air heater, Figure 2a is an overview diagram of a hot air heater showing an embodiment of the present invention,
Fig. b is a front view of Fig. 2a with the main body front plate removed, and Fig. 3 is a partially cutaway perspective view of the same machine. 3... Combustion fan, 4... Burner, 6
2,63...Heat exchanger, 8...Circulation fan impeller.

Claims (1)

[Scope of utility model registration request] a burner; a plurality of heat exchangers connected to the burner;
It is equipped with a circulation fan that blows air to the outer surface of the plurality of heat exchangers, and a main body that houses the heat exchanger with the burner and the circulation fan inside and has a hot air outlet. It is designed to blow air to
The plurality of heat exchangers are arranged in positions surrounding a circulation fan,
A hot air heater in which the fan casing is shaped by curving the surface surrounding the circulation fan of each heat exchanger, and a discharge port is provided between each heat exchanger.