JPS62101296A - Drum type 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 [Technical Field of the Invention] The present invention relates to a drum dryer that performs wrinkle prevention operation by supplying cold air into a rotating drum following drying operation.

[Technical background of the invention and its problems] Conventionally, following the end of the drying operation, a fan device is operated while rotating the rotating drum to supply cold air into the rotating drum with the heater turned off. A Dryer is provided that performs wrinkle prevention operation to prevent wrinkles from forming on items to be dried (11-). Due to the low finished temperature of the dried material after the operation, it was cold and uncomfortable when worn immediately. In addition, if the materials to be dried include thick materials or materials that are difficult to dry, if the outside air temperature is room temperature, drying will proceed even during wrinkle prevention operation, so no particular problem will occur. Like outside air 1. In the winter when the temperature is low, if there is an object to be dried that contains moisture in the rotating drum, that moisture will transfer to other objects to be dried, and the object to be dried after the wrinkle prevention operation will not contain moisture. The problem was that the stone felt uncomfortable.

[Second aspect of the invention] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a comfortable dry cloth not only when the ambient temperature of the outside air is at room temperature, but also in winter when the ambient temperature is low. To provide a drum type dryer capable of drying objects to be dried.

[Summary of the Invention] The present invention performs a drying operation by supplying heat lice into a rotating drum containing objects to be dried using a heater and a fan device, and after the completion of this drying operation, the power to the heater is cut off. In the process of supplying cold air into the rotating drum by a fan device to perform wrinkle prevention 11-operation for wrinkle-freeing the dried material 11, a temperature detector is provided to detect the ambient temperature of the outside air m, and the surrounding temperature is 11μ degrees. The present invention is characterized in that the heater generates heat intermittently or with a lower calorific value than during drying operation when the temperature is below a set value.

[Embodiment of the Invention] An embodiment of the present invention will now be described with reference to the drawings. Reference numeral 1 denotes a dryer main body, and a door 2 is supported at the center of the front surface of the dryer main body so as to be openable and closable. Inside the dryer body 1, there is a rotary drum 4 which is rotationally driven by a motor 3 and communicated with the door 2, and a rotary drum 4 which is rotatably driven by the same motor 3 as the rotary drum 4 and which is connected to the dryer body 1.
A fan device 5 that sucks air from outside the drum and supplies it into the rotating drum 4, and a heater 6 that heats the outside air sucked by the fan device 5 and heats it until it is supplied into the rotating drum 4 are arranged. It is set up. 7 is a temperature sensor such as a thermistor placed on the front side of the dryer body 1 so as to be in contact with the outside air, and 8 is an operation panel placed on the lower front side of the dryer body 1. A display section 9 consisting of several switches and a display section 10 consisting of several pilot lamps are disposed here. As shown in FIG. 2, inside the dryer main body 1, there is a control circuit 11 constructed of, for example, a microcomputer device and a dryness detection section 12 that detects the degree of dryness by detecting the exhaust temperature, etc. It is arranged.

Next, the operation of the above configuration will be explained. When the drying operation is started by controlling the operation unit 9, the motor 3 and the heater 6 are energized via the control circuit 11, and the drying operation is performed. During this drying operation, the rotary drum 4 and fan device 5 are driven to rotate by the motor 3, and at the same time, the heater 6 is energized, so that the material to be dried in the rotary drum 4 is agitated, and the fan device 5 drives the main body of the dryer. The outside air sucked into the rotating drum 1 is heated and hot-aired by the heater 6, and the hot air is supplied into the rotating drum 4, and l! ♂
It removes air and is discharged to the outside of the dryer main body 1 as exhaust air. When the drying operation described above is continued for a predetermined period of 11:7 and the degree of dryness of the object to be dried reaches a constant value, the dryness detection section 12 detects that the temperature of the air has reached the set value. (Time T in Figure 3, reference 11)
Thereafter, the control circuit 11 shifts to wrinkle prevention operation.

Hereinafter, the process of this wrinkle prevention operation will be explained with reference to FIG. 3. That is, as shown in FIG. 3(a), when the temperature of the outside air, which is the ambient temperature, is at room temperature, which is higher than the set temperature t°C, the motor 3 is intermittently turned on by the control circuit 11 with a period T1 off and a period T2 on. is energized, and the heater 6 is off for the entire period. Therefore, when the motor 3 is energized in this state, the rotating drum 4 and the fan device 5 are driven to rotate. At the same time, outside air is supplied into the rotary drum 4 by the fan device 5, and the normal anti-wrinkle operation using cold air is carried out.

At this time, the period T1 is set to be longer than the period T2. In this case, even if the motor 3 is continuously energized to continuously drive the rotary drum 4 and fan device 5, the same wrinkle-preventing operation as described above can be obtained.

In addition, as shown in FIG. 3(b), when the outside air '/MD is lower than the set temperature t°C, the control circuit 11 intermittently energizes the motor 3 with a period T3 off and a period T4 on. In addition, since the heater 6 is turned on for a period T4, in this state, the material to be dried is stirred in the rotating drum 4, and at the same time, the outside air sucked in by the fan device 5 is heated by the heater 6, and the temperature slightly decreases to 1- After being lifted up, it is supplied into the rotating drum 4 and the wrinkle prevention 11-operation is performed. Therefore, outside air 1. ! i! Even when the temperature is low, the material to be dried after the drying prevention operation reaches a cooling temperature that is slightly higher than the outside air temperature, and a fluffy and good cooling state is obtained. It will not feel cold and will be comfortable to wear. In addition, in this case, drying will proceed regardless of whether the outside air is 1M degrees or lower, so even if there are thick or difficult-to-dry items mixed in, moisture will be prevented from transferring to other items to be dried, resulting in a good drying process. Dry conditions are obtained. and,
At this time, period T4 is set to be shorter than period T3. In this case, the motor 3 is continuously energized and the rotating drum 4 is
Then, the fan device 5 is continuously driven and only the heater 6 is intermittently energized and de-energized at the intervals indicated by 1-, or the heater 6 is continuously energized with extremely low heat generation compared to during drying operation. Similarly, you can obtain a ``niri state'' with 9-strokes.

In addition, as shown in Figure 3 (C), after shifting to anti-wrinkle +1- operation, the temperature of the outside air becomes lower than the set temperature t'C, and then the temperature of the outside air becomes lower than the set temperature t'C again. If it becomes high, the control circuit 11 initially controls the motor 3.
is intermittently energized with a period T1 off and a period T2 on, and the heater 6 is turned off, but the temperature of the outside air is lower than the set temperature t.
℃, the motor 3 is intermittently energized by the control circuit 11 with a cycle of T3 off and T4 on, and at the same time, the heater 6 is turned off for T4, after which the temperature of the outside air decreases. +li and higher than the set temperature t'C, the control circuit 11 intermittently energizes the motor 3 with a period T1 off and a period T2 on, and the heater 6
is turned off. Therefore, in this case as well, a fluffy and good t-shirt condition can be obtained as described above, and good comfort can be obtained even if 1"1 is used for wrinkle prevention immediately after driving.

In the above embodiment, the description has been made by applying the dryer to a horn type exhaust type dryer that removes moisture from the rotary drum 4 and releases the exhaust gas to the outside of the machine.
It is equipped with a circulating air path consisting of an arrangement of a heat exchanger), a heater, etc., and the exhaust air from the rotating drum is dehumidified by the dehumidifier, reheated by the heater, and supplied to the rotating drum again for circulation. Approximately the same effect can be expected in a dryer with a tIl'+ composition.

to the river, in this case, instead of detecting the outside temperature 7:4
The cold air temperature during the anti-wrinkle operation may be detected, for example, at the outlet of the dehumidifier by a detection method, and the energization to the heater may be controlled.

[Effects of the Invention] As is clear from the above description, the present invention performs a drying operation by supplying hot air using a heater and a fan device into a rotating drum containing an object to be dried, and following the completion of this drying operation, A fan device is used to circulate cold air and supply it into the drum to perform wrinkle prevention operation to prevent wrinkles from forming on the dried material.In this process, a temperature sensor is installed to detect the ambient temperature of the outside air, etc. The heater is characterized in that when the temperature is below a set value, the heater generates heat intermittently or with a lower calorific value than during the drying operation during the wrinkle prevention operation. To provide a drum type dryer capable of drying objects to be dried in a dry state that is comfortable to wear even in winter when temperatures are as low as 71 V degrees.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a block diagram, and FIG. 3 is a timing chart. In the drawing, 1 is the dryer body, 3 is a heater, 4 is a rotating drum, 5 is a fan device, 6 is a heater, and 7 is! IIL is detection 2
g and 11 are control circuits.

Claims (1)

[Claims] 1. A rotary drum containing the material to be dried is rotated, and a heater and a fan device supply hot air into the rotary drum to perform a drying operation, and after the completion of this drying operation, the power to the heater is cut off and the drum is rotated. In the step of supplying cold air into the rotating drum by the fan device while rotating the drum to perform a wrinkle prevention operation for preventing wrinkles from forming on the dried material, a temperature detector is provided to detect the ambient temperature of outside air, etc.; A drum dryer characterized in that when the ambient temperature is below a set value, the heater generates heat intermittently or with a lower calorific value than during drying operation.