JPS5855917Y2 - electric clothes dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric clothes dryer that circulates exhaust air within a drying chamber.

Figure 3 is a temperature curve diagram of a general dryer.
The exhaust air from section 1 contains a lot of moisture, so reusing the exhaust air is not very useful, but the exhaust air from section 6 contains a large amount of hot air even though it does not contain much moisture, so it can be used again for drying. Moreover, even when the load is low, the exhaust gas contains less moisture and can be used for drying again.
In the past, the heat was exclusively discharged outside the machine, resulting in an extremely large heat loss.

The present invention has been devised in view of these points, and will be described in detail below according to an embodiment shown in the drawings.

FIG. 1 is a schematic side sectional view of an embodiment of the present invention, and FIG. 2 is an electrical circuit diagram of an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a main body of an electric clothes dryer, and inside this main body 1, a rotary drum 2 into which items to be dried are fed is rotatably supported.

This rotary drum 2 has an opening 2A on the front side, and a door 3 provided on the front side can be opened and closed through the opening 2A, or it can be loaded from the front side by making it detachable.

The rotating drum 2 is driven by a motor 4 disposed at a predetermined position of the main body 1 via a belt 5.

A suction port 6 having a suction filter 6A for sucking external air into the main body 1 is formed on the front surface of the rotating drum 2.

Reference numeral 7 denotes a fan, which is driven by the motor 4 via a belt 8. The rotation of the fan 7 causes external air to pass through the rotary drum 2 through the suction port 6 and through the exhaust passage 9. It is discharged to the outside from the exhaust port 10.

The exhaust passage 9 is formed to communicate with the suction port 6 via a circulation passage 11.

A drying heater 12 is disposed at an appropriate position in the circulation passage 11 on the suction port 6 side.

This heater 12 can be efficiently controlled by using a semiconductor heater, but it may also be a hot wire heater.

Further, a damper 14 operated by a magnet 13 as a means for opening and closing the circulation passage 11 is placed at an appropriate position in the circulation passage 11.
It can be opened and closed freely.

15 and 16 are timers, and this timer 1
5.16 are arranged at appropriate positions on the front surface of the main body 1.

A predetermined drying operation is performed by setting the timer 15 or 16.

Next, the electric circuit shown in FIG. 2 will be explained.

A door switch 17 is connected in series with the timer 15, and this timer 15 and another timer 16 are connected in series.

The timer 15 has a contact S□, a contact S2, and a contact S3.
The contact S2 of the timer 15 and the timer motor 18 are connected in series, and the contact S3, the parallel circuit of the motor 4 and the heater 12 are connected in series.

The b contact of the contact S1 and the contact S3 are connected in parallel with the a contact of the contact S1 and the contact S4 of the timer 16, and the magnet 13 and the timer motor 19 are connected to the parallel circuit of the contact S3 and the contact S4. be.

The timers 15' and 16 control the motor 4, the heater 12, and the magnet 13, and perform normal exhaust drying operation, exhaust circulation drying operation, and drying operation that switches from external exhaust to exhaust circulation during drying. A timer device is constructed that can selectively execute.

Next, the operation of the electric clothes dryer configured as described above will be explained.

When the contact S1 of the timer 15 is OFF, its contact a closes,
When set, it switches to contact.

Contact S2 of the timer 15 is turned ON when the timer 15 is set.

Contact S3 of the timer 15 is normally ON, and turns OFF when the timer 15 is set.

The contact S4 of the timer 16 is normally OFF, turns ON when the timer 16 is set, and turns OFF when the timer 16 times out.

Therefore, when the door switch 17 is set ON and only the timer 15 is set, the contact S1 becomes the contact side and the contact S3 turns OFF, so the motor 4 and heater 12 are turned on for the time set by the timer 15 and the dryer is operated. Drying operation is performed with normal exhaust.

Next, when only the timer 16 is set, the contact S1 of the timer 15 becomes the a contact side and the contact S3 is also closed, so the contact S4 is turned on for the timer set time, and the damper 14 is opened by the magnet 13, causing circulation. Drying takes place.

Furthermore, when both the timer 15 and the timer 16 are set, the contact S1 of the timer 15 becomes the b-side contact, and the contact S
3 is turned off, normal drying operation continues until the timer 15 runs out, after which the timer 16 starts operating and the circulation operation is performed for the set time.

As described above, the electric clothes dryer of the present invention has a drying operation in which a part of the exhaust air is circulated within the rotating drum, and a drying operation in which the exhaust air is discharged outside the machine at the beginning, and then a part of the exhaust air is circulated within the rotating drum. By being able to select the drying operation by switching the operating state as appropriate, the desired drying operation can be selected depending on the load of the material to be dried, etc., and the exhaust gas with low moisture content that can be used for drying again is circulated within the rotating drum. By effectively utilizing the heat of the exhaust gas, drying can be carried out without reducing efficiency, and heat loss can be kept to a minimum.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a schematic configuration of an embodiment of the present invention, FIG. 2 is an electric circuit diagram of an embodiment of the present invention, and FIG. 3 is a general exhaust temperature curve diagram.

Claims (1)

[Scope of Claim for Utility Model Registration] An electric clothes dryer that heats air from the suction port with a heater and sends it into a rotating drum to contribute to drying. a passage, and a circulation passage for circulating the exhaust gas in the exhaust passage into the rotating drum, and the circulation passage is provided with an opening/closing means for opening and closing the passage, and during this time the closing means, the heater, and the motor are controlled. The timer device includes at least a drying operation in which the opening/closing means is opened to circulate the exhaust gas into the rotating drum, and a drying operation in which the opening/closing means is closed at the beginning of the drying operation to exhaust the exhaust gas outside the machine, and then the opening/closing means is opened. An electric clothes dryer characterized in that the electric clothes dryer is configured to be able to switch between a drying operation in which exhaust gas is circulated within a rotating drum.