JPS608257Y2 - Hot air machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot air fan having a heat exchanger heated by combustion heat, particularly an oil hot air fan, and is intended to reduce noise by making the device thinner.

In general, oil hot air fans have a hot air fan 31 installed on the back of a heat exchanger 32 as shown in FIG. 6, which has the disadvantage that the equipment becomes floating.

This problem can be solved by placing the fan at the bottom of the heat exchanger, but in this case, a new problem arises in that the air from the fan is disturbed and generates noise.

That is, as shown in Fig. 5, the ordinary heat exchanger 32 is constructed by joining two plates 32a and 32b, but the joint end surface 33 protrudes toward the fan side, preventing the wind from the fan. It disturbs A and B as shown by arrow C and generates noise.

The present invention solves these problems with a simple configuration, and examples thereof will be described below.

As shown in FIG. 2, a blower 1 is provided at the bottom of the pedestal 3, and a heat exchanger 2 is provided at the top of the pedestal 3.

The heat exchanger 2 is provided so as to be located on the ventilation passage of the blower 1, as shown in FIG.

Since the heat exchanger 2 is arranged as described above, the air sent by the blower 1 passes through the passages shown by arrows A and B and is blown out of the main body from the air outlet 4, as shown in Fig. 3. It is something that will be done.

The air sent by the blower 1 is indicated by the arrow A shown in Figures 3 and 4.
, B, but as shown in Fig. 5, the lower end face of the heat exchanger 2 is L-shaped 5, so the flow of air is disturbed as shown by arrow C. It is.

Therefore, as shown in FIG. 4, a substantially U-shaped metal fitting 6 is installed on the lower end face portion 5 of the heat exchanger 2 to prevent disturbance of the air sent from the blower 1.

As is clear from the drawing, this metal fitting 6 has an upper end 6
It is preferable that a is provided so as to be close to or in contact with the lower part of the heat exchanger 2, and if the gap between the two is large, a sufficient effect will not be obtained.

Further, in this embodiment, the lower side surface of the heat exchanger 2 is formed into a tapered shape so that the side surface 2b of the heat exchanger 2 does not have a large level difference between the piece 6' of the metal fitting 6 that covers the L-shaped edge 2a. This makes it possible to more reliably prevent noise caused by air turbulence.

Furthermore, since the metal fittings 6 are located along the lower edge of the heat exchanger 2, there is an advantage that the strength of the periphery of the heat exchanger is sufficient to withstand thermal deformation.

As described above, according to the present invention, it is possible to reduce the thickness of the blower and the heat exchanger by changing the positional relationship between the blower and the heat exchanger, and it is also possible to eliminate the wind noise that occurs at the windward end of the heat exchanger, thereby reducing noise. can be converted into

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an oil hot air fan according to an embodiment of the present invention, Fig. 2 is a front view of the inside thereof, Fig. 3 is a side sectional view, Fig. 4 is a sectional view of the lower end of the heat exchanger, and Fig. 4 is a sectional view of the lower end of the heat exchanger. FIG. 5 is a sectional view of the lower end surface of the heat exchanger without the U-shaped fitting, and FIG. 6 is a side sectional view of the conventional example. 1...Blower, 2...Heat exchanger, 4.
...Air outlet, 5...L section, 6...
・U-shaped metal fittings.

Claims (2)

[Scope of utility model registration request] (1) Equipped with a blower installed in the lower part of the main body case, and a heat exchanger installed in the upper part of the main case that serves as the air passage for the blower, and the heat exchanger is constructed by joining a pair of left and right plates, It has a joint end surface on the outer periphery in the vertical direction, and a roughly U-shaped metal fitting is installed on this windward joint end surface to divide the air from the blower to the left and right so that the air from the blower does not create a vortex on the lower end surface of the heat exchanger. A hot air fan that is characterized by: (2) The hot-air fan according to claim 1, wherein a tapered surface is formed between the windward end face and the side face of the heat exchanger.