JPH0687918B2 - Clothes dryer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a clothes dryer for drying clothes washed with a solvent.

(B) Conventional technology When heating and drying clothes washed with petroleum-based solvents, high-temperature drying cannot be performed from the beginning because the flash point temperature of the solvent is about 42 ° C, and at the beginning, it must be dried safely at low temperatures. After the degree of dryness increases and the residual solvent decreases, the high temperature drying is started.

An example of such a clothes dryer is proposed by Japanese Patent Application No. 63-90643. In this product, the drying chamber and the recovery tank are connected and communicated with each other, and in the initial low-temperature drying operation, a circulation air passage was formed through a lint filter, and the cooler inside the recovery tank condensed and liquefied the solvent to recover it. Reheat the air to continue drying. In the high temperature drying operation, the outside air is sucked and heated, supplied to the drying chamber, and then discharged from the exhaust port of the drying chamber to the outside.

(C) Problems to be Solved by the Invention Therefore, since lint filter is not passed through in the high temperature drying operation, lint or the like may be discharged to the outside to deteriorate the environment. Therefore, if a filter is attached to the exhaust port,
The pressure inside the drying chamber becomes high, and the dry air may leak from the opening / closing door of the drying chamber, which is usually located on the front side, and may cause the user to feel abnormal.

The present invention performs drying while circulating dry air between a drying chamber and a recovery tank, or introduces outside air to generate dry air and supplies this dry air into the drying chamber and from the drying chamber to the outside of the machine. In a clothes dryer that performs drying while discharging dry air, in the latter case, it is intended to suppress the release of lint out of the machine and to prevent the dry air from leaking from the opening / closing door. is there.

(D) Means for Solving the Problem The clothes dryer of the present invention is equipped with an opening / closing door, and a drying chamber for drying clothes washed with a solvent, and an inlet for drying air provided in the drying chamber. And an outlet, both ends of which are connected to the inlet and the outlet, and a lint filter device, a cooler and a heater and a fan, which are sequentially installed from the outlet side, for collecting a solvent, and a dry air The lint filter device and the valve body selectively switched to a position where the drying chamber and the recovery tank are circulated and a position where the outside air is introduced into the drying chamber and the air in the drying chamber is discharged to the outside of the machine. A coarse upstream filter and a fine downstream filter, an intake port provided on the wall of the recovery tank for introducing outside air into the drying chamber, and the upstream filter And a downstream side filter between the downstream side filter and the recovery tank, and an exhaust port for discharging the air in the drying chamber to the outside of the machine.

(E) Action In the low-temperature drying operation, the drying air is circulated between the drying chamber and the recovery tank, and in the high-temperature drying operation, the outside air is introduced into the drying air, which is discharged to the outside after the drying operation.

In this low-temperature drying operation, the dry air circulates through the double filter, but since negative (low) pressure is acting on the downstream side of the filter device, it may leak from the exhaust port or leak from the door. Is almost gone. In the high-temperature drying operation, the dry air is discharged to the outside through the coarse upstream filter, and at this time, the positive pressure on the upstream side of the filter and the drying chamber does not rise so much, and the leakage from the door hardly occurs.

(F) Embodiments Explaining with reference to the drawings, a machine body 1 of a dryer is divided into upper and lower two stages, a drying chamber 3 having a porous rotary drum 2 is formed in the upper stage, and a U-shaped type is provided in the lower stage. A recovery tank 4 having a passage is configured. A clothes inlet / outlet of the drying chamber 3 which is opened and closed by a door 5 is provided on the upper front portion of the machine body 1.

Further, on the upper part of the machine body 1, an operation body and a control circuit for operating and controlling the dryer are arranged. Drying room 3
Connects the outlet 6 on the rear side to the rear end of the recovery tank 4, and connects the inlet 7 on the front side to the front end of the tank.

A filter device 8 and a cooler 9 are sequentially arranged on the outlet 6 side in the recovery tank 4, and the inner bottom portion of the recovery tank 4 is formed in a chamber for storing the condensed solvent. And the entrance 7 in the recovery tank 4
On the side, a fan 10 having an air volume of 12 m ³ / min and an air pressure of 120 mmAq is provided near the inner bottom, and a heater 11 is provided near the inlet 7.

The rotary drum 2 has a central outer peripheral portion supported by a seal / sliding member 12, and the sliding member 12 divides the inside of the drying chamber 3 into front and rear portions.

An intake port 13 communicating with the suction side of the fan 10 is provided in the lower front portion of the machine body 1, and an intake valve 14 opens and closes the intake port 13. A communication port 15 is provided on the upstream side of the cooler 9 in the recovery tank 4 and on the downstream side of the filter device 8, and the communication valve 16 opens and closes by the operation opposite to that of the intake valve 14.

The filter device 8 has a coarse upstream filter 17
And a fine-grained downstream filter 18 are detachably arranged at intervals. Exhaust duct to the outside 19
Is connected to the lateral exhaust port 20 between the filters 17 and 18 of the filter device 8.

The rotary drum 2 has a rear end connected to a rotary shaft 21 driven by a motor, and is rotated or inverted at a low speed.

Thus, the dryer closes the intake valve and opens the communication valve 16 to perform the low temperature drying operation, and then opens the intake valve 14 to close the communication valve 16 to perform the high temperature drying operation.

In the low-temperature drying operation, the dry air obtained by evaporating the solvent on the rotary drum 2 is the outlet 6-the upstream filter 17-the downstream filter.
18-Communication port 15-Cooler 9-Fan 10-Heater 11-Inlet 7-Rotating drum 2 and removes lint by filter 17, dust is removed by filter 18, and solvent is removed by cooler 9. To be done. The temperature of the dry air is kept below the flash point temperature due to the increase and decrease of the air volume and thermo. During this operation, since the suction side of the fan 10 is at a low pressure, the circulating dry air hardly leaks from the exhaust port 20 or the door 5 of the drying chamber 3.

When the solvent recovery was almost completed, the high temperature drying operation was started and the intake port
Outside air is introduced from 13, the communication port 15 is closed, and the heater 11
Heats the outside air inhaled at high temperature. Dry air (heated outside air)
In the drying chamber 3 through the inlet 7, the rotary drum 2 enters and exits, the outlet 6 reaches the upstream side filter 17, and the exhaust gas is discharged from there through the exhaust port 20 and the exhaust duct 19.

At this time, since the upstream filter 17 has a coarse mesh, there is almost no pressure increase in the drying chamber 3 on the upstream side, and the dry air is smoothly discharged.

(G) Effect of the Invention According to the clothes dryer of the present invention, drying is performed while circulating the drying air between the drying chamber and the recovery tank, or external air is introduced to generate the drying air and the drying air is generated. In the structure where the drying air is discharged from the drying chamber to the outside of the machine while performing the drying while supplying it to the drying room, in the latter case, it is possible to suppress the release of lint to the outside of the machine and prevent the environment from being deteriorated. It is possible to prevent the dry air from leaking undesirably from the opening / closing door.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a clothes dryer according to the present invention. 2 ... Rotating drum, 3 ... Drying room, 4 ... Recovery tank, 5 ...
... door, 6 ... exit, 7 ... entrance, 8 ... filter device, 9 ... cooler, 10 ... fan, 11 ... heater, 13
…… Intake port, 15 …… Communication port, 17 …… Upstream filter,
18 …… Downstream filter, 20 …… Exhaust port.

Claims (1)

[Claims] 1. A door provided with an opening / closing door, a drying chamber for drying clothes washed with a solvent, an inlet and an outlet for dry air provided in the drying chamber, and both ends connected to these inlet and outlet. And, a lint filter device, a cooler and a heater and a built-in fan in order from the outlet side, a recovery tank for recovering the solvent, and a position for circulating drying air between the drying chamber and the recovery tank, And a valve body that selectively switches to a position where the outside air is introduced into the drying chamber and the air in the drying chamber is discharged to the outside of the machine, and a coarse upstream filter and a fine downstream side that configure the lint filter device. A filter and an intake port provided on the wall of the recovery tank for introducing outside air into the drying chamber, and a recovery tank wall between the upstream filter and the downstream filter. Is, clothes dryer and an exhaust port for discharging the air in the drying chamber to the outside.