JPS6220839B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clothes dryer, and more particularly to a clothes dryer having an improved filter structure provided in an opening between a drum and a heat source.

Conventionally, clothes dryers with a drum have a blower device that discharges hot air from a heat source through the drum, but if you forget to clean the exhaust filter installed between the drum and the blower device, , the amount of hot air sucked into the drum from the heat source decreases, and there is a risk that cotton dust from clothing inside the drum will flow back toward the heat source and adhere to the iron-chrome wire or nichrome wire of the heat source, causing a fire. Ta.

The purpose of the present invention is to prevent cotton dust from clothing from flowing back into the heat source by improving the structure of the opening of the drum toward the heat source, and to reduce the amount of air passing through the heat source when the exhaust filter becomes clogged. To provide a clothes dryer which is free from the danger of catching fire even if its heat source becomes red hot.

In order to achieve the above object, the features of the present invention are as follows:
The opening of the drum to the heat source is formed into a plurality of burring holes extending toward the heat source side, and a metal filter is fixed to these burring holes from the wall surface on the heat source side.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a sectional view of the overall configuration. The drum 20 provided inside the outer frame 10 is equipped with an openable and closable clothes input port 12, and the clothes to be dried thrown into the drum are stirred by a lifter 22. and the rear bearing section 26 provided on the fixed beam of the blower device 60.
The drum 20 is rotatably supported by an electric motor 30 via a transmission mechanism such as a drive belt 32 having a tension pulley 36.

Outside air for drying is sucked in through the intake port 62, guided to the heat source 50, turned into hot air, and supplied to the drum 20 via the hot air inlet 14. The hot air supplied to the drum 20 dries the clothes inside the drum 20,
After passing through the exhaust filter 28, it is accelerated by the impeller 64 in the blower device 60, which is driven by the fan belt 34 by the rotational power of the electric motor 30, and the exhaust port 7 is
0 and is discharged as dry exhaust gas. The timer 40 performs time control of the electric motor 30 and the heat source 50. 52 is an insulator that insulates and supports the iron chrome wire 54 serving as a heat source, and 80 is a drum front plate.

FIG. 2 is a cross-sectional perspective view showing the main structure of an embodiment of the present invention. The heat source 50 side of the drum 20 is a drum front plate 80, and the drum front plate 80 is provided with a plurality of burring holes 84 that raise the uprights 82 toward the heat source 50 side to form an opening 86. The metal filter 9 is fixed by a plurality of arranged claws 88.
0 is fixed to the burring hole 84 by press tightening.

Further, as shown in FIG. 1, the heat source 50 has a structure in which a plurality of insulators 52 hold an iron-chrome wire 54.
In order to effectively utilize the heat generated from the heat source, it is provided directly below the hot air inlet 14, which is relatively close to the drum 20.

With such a configuration, the drum 20
The filter 90 prevents cotton dust generated from lint from clothes inside the drum from flowing back toward the thermal side from the hot air inlet 14 due to the wind pressure generated when the drum 20 rotates and is lifted by the lifter 22 and falls. I can,
In addition, since the filter is made of metal such as stainless steel, the filter 90 is fixed with a plurality of fixing claws 88, which is impossible in the case of a filter made of synthetic resin etc. due to the strength of the material. It is a configuration that allows for a highly productive fixing method, and is also heat resistant, since when the exhaust filter 28 becomes clogged, the amount of hot air decreases and the air temperature reaches a high temperature of 120 to 150 degrees Celsius. Even in such cases, the metal filter 90 is free from deformation, degeneration, etc.
Can provide a good filter.

FIG. 3 is a cross-sectional view of a conventional filter part shown for comparison. Using a synthetic resin filter material, a filter 100 is insert-molded with thermoplastic resin and fixed to a filter holder 102, and the exhaust filter 28 is fixed to the filter holder 102. is clogged and high-temperature hot air blows out of the drum 20.
In order to prevent deformation even when flowing inside,
It is fixed to the drum 20 by riveting 106 using a presser plate 104 made of a steel plate,
The structure is complicated, which is disadvantageous in terms of productivity, and the heat resistance strength is also insufficient. In addition, the presser plate 104
Because it comes into direct contact with clothing, it requires treatments such as deburring, which further deteriorates productivity.

On the other hand, according to the embodiment of the present invention described above, the opening 86 is formed by providing a plurality of burring holes 84 that raise the upright 82 toward the heat source 50 side. It is possible to completely prevent problems such as clothing getting caught in the metal filter 90, and even if the metal filter 90 has some slack, since the raised part 82 is provided, the tip of this raised part 82 can be made of metal. In order to contact the filter 90, the tip of the upright 82 and the metal filter 90
There are no gaps between the two, and there are no problems such as lint leaking through the gaps. In addition, the strength generally decreases when an opening is provided, but
2 serves as reinforcement for the opening 86, thereby preventing a decrease in strength. Furthermore, since the metal filter is attached to the wall on the heat source side of the opening 86, clothes will not be pulled due to burrs, edges, etc. on the ends of the wire mesh, which is a drawback when using metal wire mesh as a filter material. Since catching, entangling, etc. can be completely prevented, the filter can be formed from a metal wire mesh or the like, resulting in a filter structure with high heat resistance, rigidity, and strength, and good assembly and productivity. In addition, in the example, it was explained that a fixing method using press caulking using claws was adopted, but the metal filter can also be fixed using a method in which the metal filter is clamped to the wall on the heat source side using fixing means such as auxiliary members and screws. This is possible, and produces the same effect as in the example.

As described above, according to the present invention, in a device in which a filter is provided in an opening between a drum and a heat source, clothing may be caught or tangled due to the edges of the outer periphery of the opening and the edges of the end face of the metal filter. To provide a filter structure which can prevent problems such as lint from leaking even if a metal filter should become sagging, has good heat resistance, is high in strength and has good productivity. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the overall configuration of an embodiment of the present invention, FIG. 2 is a sectional perspective view of a part thereof, and FIG. 3 is a sectional perspective view of a conventional example shown for comparison. 12... Clothes input port, 14... Hot air inlet, 2
0...Drum, 22...Lifter, 28...Exhaust filter, 30...Electric motor, 40...Timer, 50
... heat source, 52 ... insulator, 54 ... iron chrome wire,
60...Blower device, 62...Intake port, 64...Impeller, 70...Exhaust port, 80...Drum front plate, 8
2...Starting up, 84...Burring hole, 86...
Opening, 88...claw, 90...metal filter.

Claims (1)

[Scope of Claims] 1. A drum that is rotatably supported within an outer frame and accommodates materials to be dried, an air blower that blows air into the drum, a heat source that heats the air that is blown to the drum, and a drum and In a device equipped with an electric motor that serves as the drive source for the blower, a plurality of openings through which air flows are formed on the side of the drum, and the opening edges extend all the way to the outside of the drum. A clothes dryer characterized by having a burring hole having a raised part formed by bending it upward, and a metal filter covering the burring hole is provided so as to come into contact with the tip of the raised part.