JPS6214897A - Hot air supply apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to clothes dryers, heating devices, etc.
The present invention relates to a hot air supply device that supplies heated air.

2. Description of the Related Art A conventional clothes dryer was constructed as shown in FIG.

That is, 1 is an outer frame, 2 is a front plate that covers the front opening of the outer frame 1, and 3 is a rotating drum disposed within the outer frame 1. Reference numeral 4 denotes a drum front plate having a large-diameter circular opening 5 in the center, and a 7 flange 6 is formed protruding from the periphery of the circular opening 6 of this drum front plate 4, and this 7 flange 6 is fixed to the front plate 2. The front portion of the rotary drum 3 is rotatably supported by being fitted onto the annular support 7 via a bearing 8. Further, it is a rear support member having the same outer diameter as the rotating annular support member 7. Numeral 11 is a drum rear plate having a large-diameter circular opening in the center, similar to the drum front plate 4, and seven flange 12 is formed protruding from the periphery of the circular opening of this drum rear plate 110. The rear part of the rotary drum 3 is rotatably supported by being externally fitted onto a rear support member 9 fixed to the outer frame 1 via a bearing 8. 13 is the annular support 7
14 is a lint filter;
5 is a ventilation path that guides hot air from the rotating drum 3 to the fan case 16; o17 is a motor;
At the same time as the ring 18 is rotated, the drum pulley 19. The rotary drum 3 is driven through a bell) 20. 2
1 is a heater support plate fixed to the rear support body 9;
The Nenichrome heater 23 is supported through the .

24 is a heater cover fixed to the heater support plate 21.

The operation of the dryer with the above configuration is such that the motor 17 drives the fan 18 and the rotating drum 3 at the same time, and due to the action of the fan 18, the air inside the outer frame 1 is formed by the heater support plate 21 and the heater cover 24. After entering the rotating drum 3 through the ventilation path and completing heat exchange with the clothing,
The annular support 70 passes through the ventilation hole 13 and the filter 14
．． It passes through the fan case 16 and is discharged to the outside of the outer frame 1 from the exhaust pipe 26.

Problems to be Solved by the Invention In such a conventional configuration, as shown in FIG. 4 and FIG. The air flows along the streamlines a, b, and c shown in the figure, that is, the air near the streamlines & and C flows along the heater support plate 21 and the heater cover 24, so the extent to which it is heated by the heater 23 is It flows into the rotating drum 3 in a low state. On the other hand, since the air near the streamline passes through the heater 23, it flows into the rotating drum 3 in an extremely heated state.

Therefore, hot air with a large temperature difference enters the rotating drum 3.
Particularly in areas where high-temperature hot air is concentrated, there is a problem in that it has an adverse effect on clothing made of synthetic fibers that are sensitive to heat. At the same time, the air heated by the heater 23 at the bottom passes through the heater 23 installed at the top, so there is little cooling effect on the surface of the heater 23, and the heat exchange efficiency is low, and the surface temperature of the heater 23 is high. There was a problem that the life of the heater 23 was shortened.

The present invention is intended to solve these problems, and aims to equalize the temperature of the hot air and prevent a decrease in the life of the single heater.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a plurality of heaters arranged between opposing circulation walls, a blower device for forcing air between the circulation walls. At least one of the circulation walls in the vicinity of the heating heater is provided with a protrusion that protrudes inward of the circulation wall.

Effect: According to this configuration, due to the presence of the protrusion, the air flowing along the surface of the ventilation path formed between the opposing circulation walls mixes with the high-temperature air that has passed through the heater. Since it comes into contact with the heater above, the surface temperature of this heater can be lowered, thereby preventing a decrease in the heater life and improving the temperature distribution of the hot air flowing into the rotating drum of the clothes dryer. can also be made uniform.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. In the figure, 3o is K on both sides, and a protrusion 32 that protrudes inward is integrally formed between the upper heater 31 and the lower heater 31'. Reference numeral 33 denotes a heater cover constituting the other circulation wall, and this heater cover 33 has a protrusion 34 that protrudes inward at a position facing the protrusion 32.
In addition, a protrusion 35 that protrudes inward is also provided above the upper heater 31.

With the above configuration, streamlines a/, a flowing along the inner surfaces of the heater support plate 30 and the heater cover 33
The air flow indicated by / is caused by the protrusions 32 and 34 provided above the lower heater 31', which creates a constriction effect on the ventilation path formed between the heater support plate 30 and the heater cover 33, and the flow rate increases. increases. Then, the air flows of a' and C' whose flow velocity has increased mix with the air flow of b' and reach the upper heater 3.
It reaches 1. In this way, the relatively low-temperature flows a' and b' join the high-temperature air b' that has passed through the lower heater 31', so that the upper heater 31 can be cooled, and the air that has passed through the upper heater 31 can be cooled. At this point, the hot air is homogenized. Furthermore, the protrusion 35 provided above the upper heater 31 mixes the hot air again before it flows into the 12-rotating drum, making it possible to supply more uniform hot air to the rotating drum. O Effects of the Invention As described above, according to the present invention, the present invention includes a heating heater disposed between opposing circulation walls, and an air blower for forcing air between the circulation walls, and the heating heater At least one of the circulation walls in the vicinity of the circulation wall is provided with a protrusion that protrudes inward of the circulation wall. The air flowing through the heater and the high-temperature air that passed through the heater mix and come into contact with the heater above, and as a result, the surface temperature of the heater above can be lowered. It is possible to prevent a decrease in the service life of the clothes dryer, and it is also possible to equalize the temperature distribution of the hot air flowing into the rotating drum of the clothes dryer.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a hot air supply device showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. FIG. 4 is a perspective view of the hot air supply device in the dryer, and FIG. 5 is a sectional view taken along the line B--B in FIG. 4. 3o... Heater support plate (circulation wall), 31.31
'... Heating heater, 33... Heater cover (circulation wall), 32.34.35 Kawakawa protrusion. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A plurality of heating heaters arranged between opposing circulation walls,
A hot air supply device comprising: an air blower for forcing air between the circulation walls; and a hot air supply device, wherein at least one of the circulation walls near the heating heater is provided with a protrusion projecting inward of the circulation wall.