JPS60174189A - Clothing 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 FIELD OF INDUSTRIAL APPLICATION The present invention relates to a clothes dryer for general household use.

Conventional Structure and Problems Conventionally, this type of clothes dryer detects a predetermined drying level of the object to be dried by detecting the electrical resistance when it comes into contact with the object to be dried, and then uses a temperature detection element to determine the level of dryness in the drum. The hot air drying operation was stopped after detecting the temperature rise of the circulating hot air and calculating the delay time, but the installation position of the temperature detection element was not sufficiently considered, resulting in the problem that the detection level varied. there were.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems and improves the reliability of the detection level of a temperature detection element in a clothes dryer.

Structure of the Invention The clothes dryer of the present invention performs drying using hot air that heats air, and uses a means for detecting a predetermined drying level of the items to be dried, and a temperature detecting element from the point at which this drying level is reached, to dry the clothes in the drum. means for detecting the temperature rise of the circulating hot air and calculating and controlling the delay time, and then stopping the hot air drying operation, and the temperature detecting element is provided in a non-rotating part farthest from the hot air outlet in the drum. This improves the reliability of the detection level.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the drawings, reference numeral 1 denotes a rotating drum serving as a drying chamber, which is rotatably supported within an outer box 2, and its rotation causes the material to be dried 3 inside to rotate and fall. 4 is a motor provided in the outer box 2 that rotates the rotary drum 1 via a belt 6 and simultaneously rotates a dehumidifying fan 8 (hereinafter referred to as a fan) in a fan case 7 via the belt 6. .

When the fan 8 is rotated, the air inside the rotating drum 1 flows from the filter cover 9 to the filter A10 as shown by the arrow.
, passes through the filter B11, passes through the fan case 7, is sent into the heater cover 13 from the ventilation path 12, becomes hot air by the heater 16 installed in the drum front plate 14, and is blown into the drum 1 through the ventilation hole 14'. be done. The hot air heats the material to be dried in the rotary drum 1, and the hot air that has removed moisture is used to repeat the above-mentioned ventilation cycle. During the hot air circulation cycle, the hot air containing a lot of humidity touches the inner wall of the fan 8 on the drum 1 side, and at the same time, the outside air also touches the wall on the outside air side of the fan 8, exchanging heat due to the temperature difference at that time, and blowing the inside of the fan 8. Water vapor in the hot air condenses on the wall and is blown away by the rotation of the fan 8, and water droplets are drained out of the machine through a drain hole 16 provided in the fan case 7. By repeating the above-described cycle, water is removed from the material 3 to be dried, and the material 3 to be dried in the drum 1 is dehumidified and dried.

Reference numeral 17 denotes an electrode for contacting the object 3 to be dried and detecting its electrical resistance (in the figure, it is shown beyond the heater 16, but this is an explanatory diagram and it was originally installed in front of the heater 15. ) is fixed to the side of the drum front plate 14 facing inside the rotating drum 1.

Reference numeral 18 denotes a temperature detection element, which is a thermistor having a negative resistance-temperature characteristic, and is attached to the drum front plate 14 in the rotating drum 1 so as to detect the temperature inside the drum 1 via the drum front plate 14. There is.

Therefore, the delay time can be determined by drying the dried material 3 in the rotary drum 1 by hot air drying as described above, detecting a predetermined drying rate with the electrode 17, and measuring the subsequent temperature rise ΔT with the temperature detection element 18. It is controlled by a control circuit that calculates and turns off the power.

The temperature detection element 18 for detecting temperature is attached to the non-rotating part of the drum front plate 14, which is the non-rotating part of the drum, at a position farthest from the hot air ventilation hole 14.
It is difficult for heat and electricity to be transmitted from the drum front plate 14, and temperature changes due to the heat of the drum front plate 14 are stable, so temperature detection can be carried out smoothly and reliability is improved.

Effects of the Invention As described above, according to the present invention, the reliability of the temperature detection element in a clothes dryer can be improved, the assembly can be completed in a short time, and the structure can be simplified.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a clothes dryer according to an embodiment of the present invention, and FIG. 2 is a front view of the same dryer. 1...Rotating drum, 14...Drum front plate, 14'.1. ... Ventilation top 5.15 ... Heater, 18 ... Pa ... Temperature detection element. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A means for detecting the drying level by contacting the material to be dried in the rotating drum, and a means for calculating and controlling the delay time by using a temperature detection element to increase the temperature of the circulating hot air in the drum from the time when this drying level is reached. A clothes dryer, wherein the temperature detection element is provided at a position farthest from a hot air vent in a non-rotating part of a rotating drum.