JPS6234558Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric clothes dryer that discharges exhaust air outside the machine after contributing to drying.

In conventional clothes dryers, when the user sets the timer knob to a predetermined time depending on the amount of items to be dried and the type of fabric, the switch inside the timer is turned on, and the timer motor, heater, and motor are energized.

At the same time, the rotating drum and fan rotate as the rotation of the motor is transmitted through the belt.

As the fan rotates, outside air is drawn into the machine, and as it passes through the heater, it becomes hot air and is sent into the rotating drum.

The general structure was to exchange heat with the water contained in the material to be dried and then discharge it from the exhaust port.

However, the exhausted exhaust gas contains a considerable amount of heat, and especially when drying a small volume, the amount of moisture contained in the exhaust air is small, so it is possible to use the exhaust air for drying again, and it is possible to leave the exhaust air as it is. If it was discharged outside the machine, it would be a huge waste of heat.

This invention was devised in view of these points,
During small-volume drying, part of the exhaust air is circulated through the heater into the rotating drum and the heat is reused for drying. This reduces wasteful heat release, improves thermal efficiency, and allows drying to be carried out in good condition. It was designed so that it could be carried out.

The present invention will be described in detail below with reference to an illustrated embodiment.

FIG. 1 is a side sectional view of a schematic configuration of an embodiment of the present invention;
FIG. 2 is an electrical circuit diagram of one embodiment of the present invention.

In the figure, 1 is the main body of the electric clothes dryer, and this main body 1
A rotary drum 2 into which the material to be dried is charged is rotatably supported inside. This rotary drum 2 has an opening 2A on the front surface, and a door 3 disposed on the front surface 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 on the main body 1 via a belt 5.

A suction port 6 for external air is formed on the front surface of the main body 1, and an intake filter 6A is provided in the suction port 6.

Reference numeral 7 denotes a fan, which is driven by the motor 4 via a belt 8. As the fan 7 rotates, external air passes through the rotating drum 2 from the suction port 6 and is exhausted through the exhaust passage 9. It is discharged to the outside from the 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 is provided at an appropriate position in the circulation passage 11 as a means for opening and closing the passage.

15 is a timer, and this timer 15 is arranged at an appropriate position on the front surface of the main body 1.

A predetermined operation is performed by setting the timer 15.

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

A door switch 16 is connected in series with the timer 15. This timer 15 has a contact S ₁ and a contact S ₂ , and the contact S ₁ of this timer 15 and a parallel circuit of the heater 12 , motor 4 , and timer motor 17 are connected in series.

A magnet 13 for operating the damper 14 is connected in series to the contact _S2 of the timer 15 via a changeover switch 18.

When the above timer 15 is set, contact S ₁ turns ON.
However, contact _S2 repeats ON and OFF at regular intervals.

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

Now, when drying a small volume, turn on the changeover switch 18 and set the timer 15, contact _S1 turns on, and the heater 12, motor 4,
The timer motor 17 is energized and operated. At this time, since the contact _S2 is turned on and off at regular intervals, the magnet 13 also operates, and the circulation duct 11 is opened or closed by the damper 14 operated by the magnet 13.

When the damper 14 is closed, the fan 7
The outside air is sucked in through the intake filter 6A provided at the suction port 6, heated by the heater 12, becomes hot air, passes through the rotating drum 2, and is transferred to the exhaust port 10.
More is discharged to the outside.

When the damper 14 is opened, a portion of the hot air is discharged to the outside from the exhaust port 10 by the fan 7, and the remaining hot air is further circulated through the circulation passage 11 to the heater 12 and the rotating drum 2. .

As described above, a part of the small volume of exhaust air during drying can be circulated within the rotating drum 2 and its heat can be reused for drying, and the same exhaust air can be constantly circulated by opening and closing the damper 14 to keep moisture. The drying efficiency does not decrease due to the increase in the content of , and drying can be carried out in good conditions.

In addition, when drying a large amount, by turning off the changeover switch 18 and setting the timer 15, the circulation passage 11 is kept closed by the damper 14 regardless of whether contact _S2 is turned on or off, and the drying process is continued. The humid exhaust air that has been used is discharged to the outside from the exhaust port 10 and is not circulated.

As described above, according to the configuration of the present invention, by switching the switch, a part of the small volume of drying exhaust air, which reduces the amount of moisture contained in the exhaust air, is circulated inside the rotating drum and the heat is used for drying. reuse and
It is possible to improve thermal efficiency by suppressing wasteful release of heat, and because the opening/closing means opens and closes periodically, drying can always be carried out in good conditions.In addition, it has a large capacity with a high moisture content. During drying, exhaust air is discharged outside the machine, allowing drying to be performed without reducing drying efficiency.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a schematic configuration of an embodiment of the present invention;
FIG. 2 is an electrical circuit diagram of one embodiment of the present invention. 2...Rotating drum, 11...Circulation passage, 13...
...Magnet, 14...Damper, 15...Timer, 18...Switch.

Claims (1)

[Scope of utility model registration request] The air sucked in from the suction port is heated by a heater and sent into the rotating drum, and the exhaust air that contributes to drying is discharged outside the machine through the exhaust passage. A circulation passage for circulating the air through the heater into the rotating drum is provided, the circulation passage is provided with an opening/closing means for opening and closing the passage, and a timer is provided for periodically opening and closing the opening/closing means, and regardless of the timer. An electric clothes dryer comprising a switch for placing the opening/closing means in a closed state.