JPS615893A - Clothing dryer - 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 The present invention relates to an improvement in a clothes dryer, particularly a portion of the rotating drum!
FC relates to a clothes dryer made entirely of synthetic resin.

For the rotating drum of a general drum-type clothes dryer, the front wall, rear wall, and cylindrical side wall of the drum are formed separately from steel plates, and after the drum is formed by spot welding and tightening, the surface is treated. There are many cases in which can-making work is performed on steel sheets that have been processed. However, this method requires a large weight of the drum itself and a large motor output for driving the drum.

Also, drum production is troublesome.

Furthermore, dryers with drums made of steel have high thermal conductivity, and under a constant amount of supplied heat and constant load, the temperature within the drum rises slowly, and heat is dissipated to the outside air to a large extent. Therefore, the applicant previously proposed molding the rotating drum from synthetic resin, and the present invention relates to improvements thereon.

The main purpose of the present invention is to prevent deformation of a rotating drum made of synthetic resin.

The present invention provides an outer frame, a rotary drum rotatably supported within the outer frame, a drive means for rotating the rotary drum, a heat generating means provided outside the rotary drum, and a heat generating means that is heated by the heat generating means. A blower for introducing the air into the rotating drum and discharging the air inside the rotating drum to the outside of the rotating drum, and a filter for removing dust contained in the air inside the rotating drum. , the rotating drum is composed of a rear wall, a front wall provided with a clothing entry/exit section, and a cylindrical side wall connecting the front wall and the rear wall, the front wall being formed of a steel plate, and the rear wall and the cylindrical side wall being connected to each other. The lifter provided within this circumferential side wall is integrally formed of synthetic resin, the heat generating means is composed of a semiconductor resistance element with positive resistance temperature characteristics, and the air heated by the heat generating means is formed of a steel plate. The main feature is that it is introduced into the rotating drum from the front wall side.

According to the above configuration, the following actions and effects can be expected.

(1) Since the rotary drum has these cylindrical side walls, rear wall and lid integrally formed, molding work is easy.

(2) Since the synthetic resin lid is integrally formed with the synthetic resin rotating drum, the lifter is not reinforced and thermal deformation of the synthetic resin rotating drum can be suppressed.

(8) Since the air heated by the heat generating means is introduced into the rotating drum from the front wall made of a steel plate, the structure is strong against heat. That is, with a rotating drum,
The area with the highest temperature is the front wall where the hot air is introduced. Since this part is made of steel plate, it is less prone to thermal deformation than synthetic resin.

(4) Since a semiconductor element with positive resistance temperature characteristics is used as the heat generating means, even if the filter becomes clogged when the dryness of the clothes reaches approximately 100 cm, the temperature inside the rotating drum and The discharge temperature does not rise, and thermal deformation of the synthetic resin rotating drum is suppressed.

EMBODIMENT OF THE INVENTION Below, one embodiment of the present invention shown in the drawings will be described in detail. In FIG. 1, a cabinet 10 is comprised of a front panel 14 having an opening 12 for putting in and taking out clothes, a rear panel 16, and a surrounding member 18 connecting the front panel 14 and the rear panel 16.

This cabinet 10 is a solid rectangular parallelepiped.

Inside this cabinet 10, a rotary drum 20, which is a cloth container for storing items to be dried such as clothes, is rotatably arranged. This drum 20 has an opening 22t in which a clothing inlet/outlet is provided, a front wall 24 having small exhaust holes 2 circumferentially, and
6, and a cylindrical side wall 30 that is connected to the front wall 24 and the rear wall 281. This rotary drum 2'0 is formed into a bottomed cylindrical shape with one side open by the above-mentioned elements. Although the opening 22 serves both as a clothes inlet and as an air intake, it is also possible to provide a separate air intake.

Further, the rotating drum 20 is integrally molded from synthetic resin as shown in detail in FIGS. 2 and 3. In the embodiment, the rear wall section 289 and the cylindrical side wall section 30. Lifter 32. An auxiliary lifter 33 is integrally molded from synthetic resin. In this case, the front wall 24 is made separately from synthetic resin or copper plate and is fixed to the end of the cylindrical side wall 30 by screws or other fastening means 34. However, it goes without saying that it is also possible to conversely form the front wall part 24 integrally with the cylindrical side wall part 30, and to form the rear wall part 28 separately therefrom and to connect them in the same manner as described above.

The opening 12 of the front panel 14 of the cabinet 10 is provided with a door 36 for taking in and taking out clothes. The front part 38 of this door 36 is formed on the same plane as the front pulse 14, and the rear part 40 is formed on the front wall part 24 of the rotating drum 20.
It is inserted into an opening 22 formed in. Also door 36
A handle 42 is provided on the upper front surface of the VC, and by pulling this handle 42f toward you, the door 36 is hinged (
(not shown) is used as a fulcrum and the clothes are placed on the rotating drum 2.
9 inserted into 0 can be taken out.

A protective cover 44 is fixed inside the opening 12 of the front panel 14. A gasket 46 is fixed to the outer peripheral edge of this protective cover 44, so that when the door 36 is closed, the door 36
The drum 20 is in close contact with the rear surface 4o of the drum 20 to prevent the hot air inside the drum 20 from flowing out. Furthermore, the inside of the protective cover 44 extends inside the drum opening 22, so if the protective cover 44 is made of a material with poor thermal conductivity, such as synthetic resin, there is no risk of burns to the user when putting in and taking out clothes. It is. A motor 48 is provided inside the lower part of the cabinet 10. This motor 48 is fixed to the bottom surface of the surrounding member 18 of the cabinet 1o via a vibration isolating rubber 50 with screws or the like.

The motor 48 transmits its rotational force to the covered conductor via two left and right shafts 52 and 54. First, the belt 58 wound around the outer periphery of the cylindrical side wall portion 30 of the rotary drum 2°·t \ is driven around the shaft 52 via the four-reed idle pulley 56t to rotate the rotary drum 2o. Idol Boo I
J56 is supported via a support member 6o, and is configured such that its tension is PTU by a spring 62. The other shaft 54 drives a fan 64 via a belt 63.

The inside of the door 36 is formed in a hollow shape as shown in FIG. 1, and heating resistors (hereinafter P, T, C
(abbreviated as "element") 66 is provided. This P, T,
The C element 66 is sandwiched between two end plates 68 and 70 and fixed to the inner surface 40 of the door 36 via an insulating support 72. The rear surface 40 of the door 36 is covered with a heat insulating protection plate 74 to protect the user from burns when the door 36 is opened.

P on the rear surface 4o of the door 36 and the protection plate 74.

Small holes 76 , 78 are provided for guiding the air heated by the T, C elements 66 into the drum 20 .

On the other hand, a suction port 8o is provided in the front part 38 of the door 36,
Breathe in fresh air. The intake amount is determined by the knob 8 provided on the looper 82.
Supported by adjusting 4.

A bearing portion 86 for supporting the rotating drum 20 is provided between the rear wall portion 28 of the rotating drum 20 and the rear panel 16 of the cabinet 10, and supports the rotating drum 20 rotatably. This bearing portion 86 uses self-aligning metal. The front part of the rotating drum, on the other hand, is rotatably supported by a bearing 87 in contact with an axially extending cylindrical extension.

The cylindrical side wall 30 of the rotating drum is divided into a large diameter section 90 and a small diameter section 92 by a step 88 of dimension C, as shown in detail in FIGS. 2 and 3. Furthermore, the small diameter portion 92 has a taper portion No. 9 (B>A) that becomes thinner as it moves away from the step portion 88 . A belt 58 for driving the rotating drum is wound around the step portion 88 of the small diameter portion 92 .

The tapered portion 94 provided in the small diameter portion 92 provides a force to return the belt 58 in the direction of the stepped portion, so that, together with the movement of the stepped portion 88, the belt 58 is prevented from moving in the axial direction.

Providing a step 88 on the cylindrical side wall 30 of the rotary drum 20 increases the tonality of the rotary drum 20 and facilitates its manufacture. That is, since there is no undercut in the axial direction of the rotating drum 20Vi, it is possible to perform die cutting in one direction in the axial direction when integrally molding the synthetic resin.

Furthermore, a cover 32 and an auxiliary lifter 33 are integrally molded inside the cylindrical side wall 30 at the same time as the cylindrical side wall 30 is molded.

On the other hand, a boss 98 for attaching a shaft 96 is integrally formed on the rear wall portion 28 of the rotating drum 20.
A shaft 96 having a portion 100 is attached to the washer 1.
02 and secured by screws 104.

Furthermore, the small holes 26 for exhaust are also formed integrally with the rotating drum 20 when the rotating drum 20 is formed. Note that reinforcing ribs 1Q6 and 108 are formed on both sides of the boss 98 to increase strength.

Therefore, when molding the rotating drum, the shaft mounting boss 9
8. Since the small hole 26 is also formed, the number of parts is reduced and assembly is facilitated.

A flange portion 110 having a dimension extending in the axial direction toward the rear wall side is formed on the outer peripheral edge of the front wall 24 of the rotating drum 20,
The end of the cylindrical side wall 30 is fitted inside.

A saran net 116 is installed inside the lint filter 114 for collecting cloth waste, in which the hub 112 is fitted to the boss 98.
is stretched.

Bearing portion 86 is supported by member 118 and
is fixed to the cabinet 10.

The rear panel 1 of the cabinet 10 is mounted on the upper part of the member 118.
An exhaust port 120 is formed through the rotary drum 6 to exhaust air from the rotating drum 20 to the outside of the cabinet 10 through an exhaust pipe 122. 'Also rotating drum 20
A seal member 124 is provided between the rear wall portion 28 of the rotating drum 20 and the stationary member 118 so as to surround the small hole 26 of the rear wall portion 28.

A control part 126 for controlling the dryer is stored in the upper part of the front panel 14 of the cabinet 10, and a timer knob 128 is attached to the outside of the front panel 14. Support legs 130 are provided at the bottom of the enclosure 18 of the cabinet 10 to support the dryer.

FIG. 5 is a perspective view of the front wall of the rotating drum 20, and the outer peripheral edge thereof is provided with a flange 110, into which the cylindrical side wall end is inserted, as described above. This flange portion is formed in a plurality of locations to maintain the cylindricity of the ram and to prevent thermal deformation.

Furthermore, deformation due to the difference in linear expansion coefficient between the steel plate front wall 24 and the synthetic resin cylindrical side wall and rear wall 28 can be absorbed by providing the cylindrical side wall 30 or expanding and contracting the lid 32° and the auxiliary lifter 33 in the circumferential direction. do. In the above example, the case where the flange part is provided on the front wall has been explained, but it is also possible to form the front wall and the cylindrical side wall part integrally and provide the flange part on the rear wall as before. Not even.

When using the above configuration, the door 36 is first opened, the clothes to be dried are inserted into the rotating drum 20, and the door 36 is closed. On the other hand, the louver knob 84 is used to adjust the air intake amount. Next, activate the timer knob 128,
The motor 48 is started to operate the rotating drum 20 and at the same time, current is applied to the PTC element 66.

As the rotary drum 20 rotates, the fan 64 rotates to take in air through the air intake port 80.

This intake air is heated by the PTC element 66, and the heated air flow enters the rotating drum 20 through the opening 22 provided in the front wall 24 of the rotating drum 20, heating and drying the clothes. It then passes through a filter 114 attached to the rear wall of the rotating drum 20 to an exhaust port 120. It is discharged to the outside of the cabinet 10 from the exhaust pipe 122.

In the above example, since the semiconductor resistance element 66 having positive resistance temperature characteristics is used as the heating element, the amount of heat generated is automatically adjusted. In other words, power consumption P (W) is equal to air flow rate Q
(m"/Q) increases as the air flow rate increases, and decreases as the air flow rate Q decreases. This relationship can be expressed as the fourth
It is shown in the figure P-Q curve. Therefore, the dryness of the clothes is approximately 1
The exhaust gas temperature increase value ΔT(C) when the temperature reaches 00 degrees does not increase due to changes in the flow rate and shows a substantially constant value.

The ΔT-Q curve in FIG. 4 is a diagram showing the above relationship. That is, in the state of Q=0, the surface temperature of the heating element reaches the Curie temperature TC, the resistance value becomes large, and the heating element 6
Almost no current flows through 6. In this way, the heating element 66
Since the temperature does not rise above one point, there is no fear that the cloth dust adhering to the heating element 66 will catch fire in a case where cloth waste is generated, such as in a dryer. For example, one cucumber ql c is 17
If a 5C heating element is used, there is little risk of the fabric igniting. Therefore, as in the embodiment, the rotating drum 20
Even if it is made of synthetic resin, there is little risk that the rotating drum 20 will soften or burn out.

As explained above, in the present invention, either one of the front wall and the rear wall of the rotating drum is integrally molded with the cylindrical side wall from synthetic resin, and is inserted into the flange provided on the rear wall or the front wall of the rotating drum. The cylindricity of the drum is maintained, and the deformed beam of the rotating drum is prevented.
This is absorbed by the housing lifter, and it is possible to avoid excessive stress from being generated on the rotating drum.

As described above, the present invention includes an outer frame, a rotary drum rotatably supported within the outer frame, a drive means for rotating the rotary drum, and a heat generating means provided outside the rotary drum. , the air heated by this heat generating means flows into the rotating drum, ? The rotary drum includes a blower that discharges air inside the rotary drum to the outside of the rotary drum, and a filter that removes dust contained in the air inside the rotary drum, wherein the rotary drum has a rear wall and a clothing entrance/exit section. The front wall is made of steel plate, and the rear wall, the cylindrical side wall, and the lifter provided in the cylindrical side wall are made of synthetic resin. The heat generating means is made of a semiconductor resistance element with positive resistance temperature characteristics, and the air heated by the heat generating means is introduced into the rotating drum from the front wall side formed of a steel plate. It is characterized by:

According to the above configuration, the following actions and effects can be expected.

(1) Since the rotary drum has its cylindrical side wall, rear wall and lid integrally formed, molding work is easy.

(2) Since the synthetic resin lid is integrally formed with the synthetic resin rotating drum, the lifter serves as reinforcement and can suppress thermal deformation of the synthetic resin rotating drum.

(8) Since the air heated by the heat generating means is introduced into the rotating drum from the front wall made of a steel plate, the structure is strong against heat. That is, with a rotating drum,
The area with the highest temperature is the front wall where the hot air is introduced. Since this part is made of steel plate, it is less prone to thermal deformation than synthetic resin.

(4) Since a semiconductor element with positive resistance temperature characteristics is used as the heat generating means, dry armpits of clothes reach approximately 100 cm.
Even if the filter becomes clogged due to scratches, the rotating driver can still be removed.
The temperature and the discharge temperature from the rotating drum do not rise abnormally, and thermal deformation of the synthetic resin rotating drum is suppressed.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view showing an embodiment of the clothes dryer according to the present invention, Fig. 2 is a longitudinal side view of the rotating drum, Fig. 3 is a perspective view thereof, and Fig. 4 shows the characteristics of the heating element. The figure shown, FIG. 5, is a perspective view of the front wall. 10... Cabinet, 20... Rotating drum, 22
... opening, 24 ... front wall, 28 ... rear wall, 30
... Cylindrical side wall portion, 48 ... Motor, 58 ... Belt, 66 ... PTC element, 110 ... Flange portion.

Claims (1)

[Scope of Claims] 1. An outer frame, a rotary drum rotatably supported within the outer frame, a driving means for rotating the rotary drum, a heat generating means provided outside the rotary drum, and a rotating drum rotatably supported within the outer frame; A blower that causes air heated by a heat generating means to flow into the rotating drum and exhausts the air inside the rotating drum to the outside of the rotating drum; and a filter that removes dust contained in the air inside the rotating drum. A semiconductor resistance element with a positive resistance temperature characteristic is used as the heat generating means, and the rotating drum has a rear wall, a front wall on which a clothes input section is provided, and a front wall and a rear wall. The rear wall, the cylindrical side wall, and the lifter provided on the cylindrical side wall are integrally formed of synthetic resin. The front wall is formed with a metal plate such as a steel plate, and this front wall is attached to the front end of a cylindrical side wall, and air heated by a heat generating means is rotated from the front wall side. A clothes dryer characterized by being introduced into a drum. 2. A clothes dryer according to claim 2, characterized in that the gap between the protrusions is shaped to open toward the outer periphery.