JPS5839331Y2 - Onpuuki - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of the ventilation opening of a hot air fan, and is aimed at making the air passing through the ventilation opening uniform.

Generally, as shown in Fig. 4, a hot air fan has a partition plate A installed in the wind barrel to form a ventilation port B, and a grid-shaped heating element C with ventilation is installed on the outlet side of the ventilation port B. On the opposite side of the fan, a rectifying plate is provided to guide the air from the fan to the ventilation port B.

Then, the air from the fan passes through the ventilation port B and is converted into warm air by the heating element C, which is then blown out from the air outlet.

However, the air guided by the rectifier plate and flowing toward the ventilation port B is biased only toward the rectifier plate portion, as shown by the arrow E in Figure 5 and the graph, resulting in a large pressure loss and a decrease in thermal efficiency. There were other problems.

The present invention eliminates such conventional drawbacks, and one embodiment thereof will be described below with reference to the drawings.

In the figure, 1 is the housing of the hot air fan, which includes a main body 1a and a bottom plate 1b.
and an outlet body 1C, which are fixed together with screws 2.

Reference numeral 3 denotes a support plate that partitions a wind cylinder that communicates between an inlet 4 and an outlet 5 formed in the housing 1, and supports a motor 6 and a centrifugal fan 7 connected thereto.

Reference numeral 8 denotes a partition plate provided on the wind cylinder 9 between the support plate 3 and the air outlet 5, and a heating element 10 provided with air permeability in a lattice shape is attached to the side of the air outlet 5.

FIG. 2 shows the partition plate 8. Reference numeral 11 denotes a ventilation port through which the air from the fan 7 flows to the heating element 10. A wind cylinder 9 is provided from the edge of the ventilation port 11 to the fan 7 side of the ventilation port 11. A rectifier plate 12 is provided that extends spirally toward the inner wall surface of the rectifier, and is formed at a plurality of locations.

Reference numeral 13 denotes an air baffle plate provided between the baffle plates 12 so as to face the air vent 11, and 14 is a dispersion plate disposed inside the baffle plate 12, which is arranged in a spiral shape so as to divide the air vent 11. It disperses the wind from the fan 7.

Further, the air baffle plate 13 is made to protrude like a canopy so as to straddle the fan 7 side end faces of the baffle plate 12 and the distribution plate 14 facing the ventilation openings 11.

That is, in the above configuration, the air from the fan 7 passes through the ventilation port 11 of the partition plate 8, is heated by the heating element 10, and is blown out from the air outlet 5 to the outside. The air current is divided equally by the current plate 12 and the distribution plate 14 as shown by the arrow A9 in FIG. It is sent to the heating element 10.

As a result, the distribution of wind in each portion I, II, and III of the ventilation opening 11 becomes approximately uniform as shown in the graph of FIG.

Although four ventilation holes 11 are provided in the above embodiment, the number may be arbitrary, and the heating element 10 may have any shape as long as it has ventilation.

The present invention has the following effects.

In other words, the air sent by the centrifugal fan towards the inner wall of the wind cylinder is guided smoothly from the edge of each ventilation hole to each straightening plate that spreads out in a spiral from the inner wall surface of the wind cylinder to each ventilation hole. The air is once stored in the air conditioning plate and then directed toward the ventilation opening.In particular, in the present invention, the wind guided to the ventilation opening by the current plate is dispersed by the dispersion plate and directed toward the ventilation opening. As it passes through the ventilation opening, it is not concentrated in one part, but is dispersed, so the ventilation resistance is reduced and a large amount of air can be sent to the heating element, and this air also generates heat. Since heat is exchanged with a wider area of the body, heat exchange efficiency also increases.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the hot air fan according to the present invention-example;
The figure is a perspective view of a partition plate forming the ventilation hole, Figure 3 is an explanatory diagram showing the state of the wind flowing through the ventilation hole, Figure 4 is a perspective view of a partition plate showing a conventional example, and Figure 5 is the same ventilation. It is an explanatory view showing the state of the wind passing through the mouth. 4...Air outlet, 7...Fan, 10.
... Heating element, 11 ... Ventilation opening, 12 ...
... rectifier plate, 14... dispersion plate.

Claims (1)

[Scope of utility model registration request] A casing having an inlet, an outlet, and a wind cylinder that communicates the inlet and the outlet, and a motor and a support plate supporting a centrifugal fan, a partition plate installed in the wind body between the support plate and the air outlet, and a plurality of ventilation holes provided in the partition plate, A heating element is provided on the side of the air outlet, and a rectifier is provided on the side of the fan of this air hole, which spreads in a spiral shape from the edge of the air hole to the inner wall surface of the wind barrel, and guides air from the fan to the air hole. A plate is provided, and a spiral distribution plate is disposed inside the current plate so as to divide the ventilation hole, and an eaves-like distribution plate is provided so as to span the fan side end face facing the ventilation hole of the current plate and the distribution plate. A hot air fan equipped with a protruding air conditioning plate.