JPH0455000A - Dryer - Google Patents

Abstract

PURPOSE:To reduce wear on clothing by providing with a driving motor to rotate two wing fan and drum, and a clutch to control ON-OFF the drum rotation without stopping the rotation of two wing fan. CONSTITUTION:A dryer which dries clothings by sending hot air into a drum 1 with a two wing fan 8 rotated is provided with a driving motor 9 to rotate the two wing fan 8 and drum 1 through a shaft 4, and a clutch 17 mounted on a driving side of shaft of the drum 1 to control ON-OFF the rotation of the drum 1 without stopping rotation of the two wing fan 8. Thus, the drum 1 can be rotated intermittently without stopping the rotation of the two wind fan 8, with resulting the reduction of a machine force upon clothing, and of the abrasion of a sliding part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a clothes dryer, and particularly to a clothes dryer that has been improved to reduce damage to clothes.

[Conventional technology] FIG. 5 is a sectional view of a conventional clothes dryer.

The clothes dryer includes a drum 1 for storing clothes to be dried. The drum 1 is rotatably supported by a support plate 3 provided with a plurality of air blowers a02. drum 1
An exhaust lower is provided on the rear side. A filter 6 is provided to cover the exhaust lower. filter 6
is protected by a filter cover 5.

A double-blade fan 8 that also serves as a heat exchanger for dehumidification is provided behind the drum 1. The double-winged fan 8 is rotatably supported by the drum shaft 4.

The drum 1 and the double-winged fan 8 are rotated by a drive motor 9 via a shaft. Due to the rotation of the double-blade fan 8, air enters the drum 1 from the air outlet 2 through the duct 10 in the direction of the arrow A, and circulates through the filter 6.

A heater 11 is provided within the duct 10 and in front of the air outlet 2. The air is heated by this heater 11, turns into warm air, and heats the clothes in the drum 1.
Evaporate moisture.

On the opposite side of the double-wing fan 8, as shown by arrow B,
By taking in cold air from the outside and discharging it, the hot air passing in the direction of arrow A is cooled and the hot air is dehumidified.

The condensed water is drained from the drain port 1 provided at the bottom of the duct 10.
2, it is discharged outside the vessel.

By the way, the drum 1 rotates at a low speed (40 to 60 rpm), and the cycle of the clothes being lifted to the top of the drum 1 and then falling due to their own weight is repeated to maintain good contact between the warm air and the clothes. .

By repeating the above steps, the clothes inside the drum 1 are dried.

Further, in the duct 10, a thermistor 13 for detecting the temperature of hot air is provided near the exhaust lower, and a thermistor 14 is also provided in front of the heater 11, and the detection temperature of these two thermistors is When the difference exceeds a set value, it is determined that drying is complete and the operation is stopped.

[Problem to be solved by the invention] By the way, when drying clothes with a clothes dryer, 4 kg
It usually takes 3 to 4 hours to dry one piece of clothing. Furthermore, recently, clothes dryers have become larger, and the drying time tends to be longer. Such long-term operation is disadvantageous in that the clothing may be damaged (the mechanical force caused by tampling may cause the fabric to shrink, or the texture of the fabric may deteriorate). on the other hand,
Long-term operation of clothes dryers also causes deterioration of parts, and the deterioration is particularly noticeable in sliding parts.

This invention was made to solve the above-mentioned problems, and it is an object of the present invention to provide an improved clothes dryer that can reduce damage to clothes.

[Means for Solving the Problems] The present invention relates to a clothes dryer that rotates double-blade fans to send warm air into a drum to dry clothes stored in the drum. The clothes dryer includes a drive motor that rotates the two-wing fan and the drum through a shaft, and a drive motor that is installed on the drum driving shaft, and turns on and off the rotation of the drum without stopping the rotation of the two-wing fan. A clutch that performs OFF control is provided.

[Function] The clothes dryer according to the present invention includes a clutch that performs ON/OFF control of the rotation of the drum without stopping the rotation of the double-blade fan, so that the drum cannot be rotated intermittently. can.

Therefore, the mechanical forces applied to the garment are significantly reduced.

Furthermore, wear on the sliding parts of the dryer is also reduced.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic sectional view of a clothes dryer according to an embodiment of the present invention. The embodiment shown in FIG. 1 is similar to the conventional example shown in FIG. 5 except for the following points, and corresponding parts are given the same reference numerals and their explanations will be omitted.

The difference between the embodiment shown in FIG. 1 and the conventional example shown in FIG. 5 is that a clutch is installed on the shaft on the drum drive side to perform ON/OFF control of the rotation of the drum 1 without stopping the rotation of the double-blade fan 8. 17. clutch 1
An enlarged view of the surrounding area of 7 is shown in FIG.

Referring to FIGS. 1 and 2, a clutch 17 is provided between the drive motor 9 and the drum pulley 16, so that the rotation of the drum 1 can be separated from the rotation of the drive motor 9. ON/OFF of clutch 17 is controlled by thermistor 13.1
The temperature of the circulating air detected in step 4 can be controlled both by calculating the temperature and by the time interval. usually,
Although an electromagnetic clutch is used as the clutch 17, a dog clutch (such as a two-scratch clutch) may also be used for the purpose of cost, transmission torque, and size reduction. In tooth-scratch etc., the engagement is in a static state or 3Qr.
Since it is necessary to perform at a low speed below pm, the clutch should be turned on.
At this time, control is performed to stop the rotation of the motor 9 for -10 seconds and then restart it.

Next, the operation will be explained.

FIG. 3 shows changes in the temperature of the circulating air (exhaust temperature from the tram 1, temperature of intake air to the heater 11) during the operation of the clothes dryer. In the clothes dryer according to the embodiment, during the heating period, drum 1
is stopped, and only the hot air is heated by the double-blade fan 8.

Thereafter, when the temperature inside the drum 1 becomes stable and a careful drying period begins, the drum 1 is rotated intermittently. This intermittent rotation is
In principle, it is turned on and off at set time intervals, but if the internal temperature rises above the set temperature while drum 1 is not rotating, it is forced to turn on and off in order to avoid excessive partial heating of the clothes. Rotate drum 1. Further, when the drying progresses and enters the decreasing rate drying period, the drum 1 is continuously operated until it is stopped in order to detect the completion based on the difference in intake and exhaust temperatures.

Next, the operation will be specifically explained based on the flowchart shown in FIG. First, at the start stage, clutch 1
7 is separated, and only the double-blade fan 8 is used to heat the hot air. Thereafter, after 5 minutes (- example) has elapsed during which the output of the heater 11 stabilizes at the temperature set value, the temperature of the exhaust gas from the drum 1 is detected. Referring to FIG. 3, when the rising curve becomes stable (for example, the rising width is within 3° C. in 3 minutes), it is determined that the careful drying period has entered, and the drum 1 starts to rotate intermittently. This intermittent operation is performed in a cycle in which the drum 1 is rotated for 3 minutes and then stopped for 7 minutes. When the drum 1 is stopped during the constant rate drying period, when the exhaust temperature exceeds a certain value, the drum 1 is forcibly rotated over time control in order to prevent local heating of the cloth.

Furthermore, during operation with the drum 1 stopped, the difference in intake and exhaust temperatures is constantly monitored in addition to the above-mentioned temperature detection. If it is recognized that the temperature difference expands to a certain extent over a certain period of time (
For example, if the temperature difference is 4-6° C. in 2 minutes, it is determined that the decreasing rate drying period has entered, and the drum 1 is then continuously rotated. This part is controlled in the same way as a conventional clothes dryer, and the operation is stopped when the difference in temperature between intake and exhaust air exceeds a set value. However, if it turns out that the judgment that the lapse rate drying period has entered is incorrect due to things such as unevenness of the clothes (in other words, if the exhaust temperature remains the same), then the intermittent tampling should be performed again. Go back and repeat the previous cycle.

Taking a dehumidifying clothes dryer with a drying capacity of 4 kg as an example, out of the total drying time of 200 minutes, the heating period is 30 minutes, the careful drying period is 130 minutes, and the reduced rate drying period is 40 minutes. Applying the above control to this and calculating the time for one rotation of the drum, the result is as follows, and compared to the conventional dryer, the rotation time of the drum 1 is reduced to about 40% of the total drying time.

Therefore, 60% of the mechanical force applied to the clothes due to tamping is removed, reducing damage to the fabric and minimizing deterioration of the sliding parts of the clothes dryer.

[Effects of the Invention] As explained above, according to the clothes dryer according to the present invention, the drum drive shaft is provided with a clutch that performs ON/OFF control of the rotation of the drum without stopping the rotation of the double-blade fan. Therefore, the drum can be rotated intermittently. Therefore, the mechanical forces applied to the garment are significantly reduced. As a result, there is an effect that the damage to the cloth is reduced and the texture is not impaired. Also, related to the above.

Since the amount of lint and lint from clothing is reduced, the accumulation of lint and other items on various parts is reduced, which reduces the obstruction of air passages and the effort required to clean filters. Furthermore, wear of the sliding parts of the dryer is reduced, resulting in a longer life.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a clothes dryer according to an embodiment of the present invention. FIG. 2 is an enlarged view of the vicinity of the clutch of the clothes dryer according to the embodiment. FIG. 3 is a graph showing changes in intake and exhaust temperatures during drying operation. FIG. 4 is a flowchart for explaining the operation control method of the clothes dryer according to the embodiment. FIG. 5 is a schematic cross-sectional view of a conventional clothes dryer. In the figure, 1 is a drum, 2 is a hot air outlet, 8 is a double-blade fan, 9 is a drive porter, 11 is a heater, 16 is a drum pulley, and 17 is a clutch. In each figure, the same reference numerals indicate the same or corresponding parts. Island 2 map Island 3 map prefecture I last year 76) Heater drum A lJ 2 La Nona

Claims (1)

[Claims] A double-blade fan is rotated to send warm air into the drum,
A clothes dryer that dries clothes stored in the drum, comprising: a drive motor that rotates the dual-wing fan and the drum via a shaft; and a drive motor that is provided on the drum drive shaft and that rotates the dual-wing fan. The rotation of the drum is turned on and off without stopping.
A clothes dryer equipped with a clutch that performs FF control.