JPS6068898A - 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 This invention relates to a dryer for drying clothes used in general households.

Conventional configuration and its problems Traditionally, methods for detecting the completion of drying in clothes dryers include installing electrodes inside the drum to electrically detect the wetness of the clothes, and using a thermistor to measure the temperature difference between intake and exhaust air. A method is used to detect this and control the electric circuit. However, the former electrode method has the disadvantage that it is necessary to provide an attachment part for the electrode inside the drum, resulting in a complicated structure and a complicated electric circuit. The latter method of detecting the temperature difference between intake and exhaust using a thermistor, etc.
Publication No. 78, Special Publication No. 55-133300. This is described in Japanese Patent Application Laid-open No. 56-57499, etc., and is activated when the temperature of the suction air reaches a certain set value.
Depending on the type of clothing (for example, rather thick clothing, jeans, judo uniforms, etc.), drying was often insufficient.

OBJECTS OF THE INVENTION An object of the present invention is to provide a dryer that can perform appropriate drying depending on the type of items to be dried (for example, regular clothes, slightly thick clothes, thick clothes).

Structure of the Invention The dryer of the present invention includes a box, a drum that is rotatably housed in the box and into which materials to be dried are fed, and an intake path and a wandering air path that guide air from the box to the drum. , when the detected temperature difference between a heater arranged in the intake passage and heating the intake air, a temperature detection element provided in each of the intake passage and the exhaust passage, and each temperature detection element reaches a predetermined set value. The apparatus includes a signal generating means for generating a drying end signal, and an actuating section operated by the signal generated by this means.

For this reason, if the temperature difference between the intake air and the exhaust air is set in advance according to the type of material to be dried, when the temperature difference between the intake and exhaust air reaches the specified value, the activation part (alarm, stop switch or delayed stop The switch) is activated, allowing for proper drying without excess or deficiency.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 4. In FIGS. 1 to 3, 1 is a box of a clothes dryer, and 2 is a drum which is rotationally driven by a motor 3 via a belt 4 and a pulley 5. Reference numeral 6 denotes an exhaust fan which is driven by the motor 3 via a belt 7 and pulleys 8 and 9. 11 collects the dust scattered from the clothes in the side drum 2 in the evening. Reference numeral 12 denotes a door 9, which is closed and the clothes are thrown into the drum 2. A heater 13 heats the air sucked into the drum 2. 25 and 26
are an intake port and an exhaust port provided on the back side of the box body 1, respectively, and the air that enters from the intake port 25 passes through the intake path 27 in the box body 1, is heated by the heater 13, and is heated to the air intake port of the drum 2. 28-9 is sucked into the drum 2. Further, the humid air inside the drum 2 is discharged to the outside of the drum 2 by the exhaust fan 6, and is further discharged to the outside from the exhaust port 26 of the box body 1 via the exhaust path 29.

Reference numeral 14 denotes an intake side temperature sensing element (thermistor) provided in the vicinity of the intake port 25 of the box body 1, and numeral 15 denotes an exhaust side temperature sensing element (thermistor) provided in the vicinity of the exhaust port 26 of the box body 1. 16 is a control panel, and this panel includes a power switch 17 and push button switches 18, 19, 20 for setting the temperature difference between intake and exhaust, as shown in FIG.
will be provided.

In Fig. 3, 21 indicates a DC power supply, 22 and 2
3 are the respective sensing elements 14 . A fixed resistor and a variable resistor are incorporated in the bridge circuit together with 15.

The variable resistor 23 is connected to the push button switch 18, 19.2.
Pressing either 0 will change the resistance setting value variably. Further, 24 is an actuating part, which finally drives the motor 3.
, and controls the heater 13.

Next, we will explain the relationship between drying time and intake/exhaust temperature depending on the type of clothing and the amount of clothing put in. That is, power supply 100V, heater 1200W, exhaust air volume 2m, dry capacity 2 Ky
(drying cloth) in a home electric clothes dryer, general cotton skin and towels and thick clothing (jeans, judo clothes)
The relationship between the drying time (value) and the intake/exhaust temperature ('C) for each input amount was investigated. The results are shown in FIGS. 4 and 5, respectively. Figure 4 shows the test results for drying cotton underwear and towels, and Figure 5 shows the test results for drying thick jeans and judo uniforms.

In general, most of the clothes that are dried in the dryer are cotton underwear.
Next, it can be roughly divided into three types: children's clothes, pants, work clothes, and thick jeans. Therefore, when testing these three types in detail, we found that for cotton underwear, the amount of clothing input (A...500p, B-10009, C
-2000 9), the temperature difference (d
) was found to be almost 100% dry when the temperature reached 26°C. Furthermore, in the case of thick jeans, as shown in Figure 5, the amount of clothing input (D...500y, E...1
It was found that, regardless of the temperature difference (d') between the intake and exhaust air, when the temperature difference (d') between the intake and the exhaust reaches 35°C, the dryness is approximately 100°C.

Therefore, based on this test result, determine the intake/exhaust temperature difference setting value by dividing the clothing into three types, for example, regular clothing, slightly thick clothing, and thick clothing (jeans). ℃, approximately 30℃ for slightly thick materials, and approximately 35℃ for thick materials).

This results in a dry finish (nearly 100%) that matches each garment. Note that this phenomenon occurs even if the outside temperature changes (5 to 35°C), the output of the heater 13 (1200°C)
It is known that if W) does not change, it will take almost the same value, and there is no need to correct for changes in outside temperature.

In other words, the operation is extremely simple; turn on the power switch 17 shown in Fig. 2, and select the type of clothes to be dried (
・Push button switches 18, 19 . for normal clothing, II...slightly thick, ■...thick clothing). 20 (7) You can press either one. In this way, when the intake/exhaust temperature difference reaches a predetermined value, the operating section 24 of the clothes dryer can decide whether to notify with a buzzer or other alarm, to stop, or to stop after a certain time delay, depending on the design specifications. operate in a determined manner.

In the above explanation, the test results for regular cotton clothing were explained, but since chemical fibers require less drying time, it is only necessary to press the push button switch 18 (■...regular clothing).

Moreover, a variable resistance switch can be used in place of the variable resistance 23 as means for variably switching the set value of the temperature difference between the intake and exhaust air.

Effects of the Invention According to this invention, by setting the temperature difference of absorbed air in stages according to the type (drying ease) of the objects to be dried, such as clothing, the objects to be dried can be appropriately dried. This has the advantage that the operation can be performed easily and reliably.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a front view of its control panel, Fig. 3 is a circuit diagram of a bridge circuit, and Fig. 4 is a diagram of ordinary cotton clothing (skin care, towels). FIG. 5 is a graph showing the relationship between drying time and suction/exhaust temperature. FIG. 5 is a graph showing the relationship between drying time and suction/exhaust temperature for thick clothing (jeans, judo uniform). l...Box body, 2...Drum, 3...Motor, 27
...Intake airway, 29...Exhaust path, 14.15...
・Temperature detection element, 23... Variable resistor, 24... Actuation part 2-602-

Claims (3)

[Claims] (1) A box body, a drum that is rotatably housed in the box body and into which materials to be dried are put, an air intake passage and a wandering air passage that guide air from the box body to the drum, and a drum provided in the air intake passage. A heater that heats the intake air, temperature detection elements provided in the intake passage and the wandering air passage, and a signal that generates a drying end signal when the difference in temperature detected by each temperature detection element reaches a predetermined set value. A dryer comprising a generating means and an operating section operated by a generated signal from the means. (2) The signal generation means is a bridge circuit incorporating each of the temperature detection elements and a variable resistor, and the set value of the detected temperature difference can be variably switched by the variable resistor. A dryer according to scope item (1). (3)゜ The dryer according to claim (1), wherein the operating section is an alarm, a stop switch, or a delay stop switch.