JPS60122600A - Operation apparatus of 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 dryer in which clothes are dried using a rotating drum. Controlled dryer operating system a
! Regarding.

[Technical background of the invention]

Traditionally, in dryers, a pair of electrodes is provided in a rotating drum, with which the clothes being agitated by the rotating drum come into contact.
The drying rate of clothes is detected based on the inter-electrode resistance value when the clothes come into contact between the electrodes, and a heater for drying operation is controlled in accordance with the detected drying rate. In this case, the interelectrode resistance value is generally converted into a voltage signal that changes in direct proportion to the drying rate of the clothes, and! Since the contact of clothing to the pole is an intermittent VC, only the time value of the voltage signal can be obtained, so the instant i is stored for a predetermined period of time by a discharge circuit consisting of a capacitor and a resistor. Such a memorized voltage signal is set in advance, then becomes constant, and when it drops to the reference voltage of pe μ, the drying operation heater is cut off and the operation is stopped.

[Problems with background technology]

When the drying rate of the clothes on the rotating drum circle is detected based on the inter-electrode resistance value, vc is such that when the amount of clothes to be dried is small, the contact pressure and contact frequency of the clothes with the electrodes decreases, and the level of the detection voltage decreases. This causes a phenomenon in which μ tends to fall below Vpe μ which corresponds to the actual drying rate. For this reason, in the conventional configuration, the drying operation is stopped when the detection voltage is constant and drops to the reference voltage of Beμ (rc), and when the number of clothes 1 to be dried is small, the timing of stopping the operation may be inadvertently set. [Objective of the Invention] The present invention has been made in view of the above-mentioned circumstances 1c, and its purpose is to control the heater for drying operation regardless of the amount of clothes to be dried. The purpose of the present invention is to provide a dryer operating device that can operate accurately.

[Summary of the invention]

The present invention is equipped with a complete detection circuit that detects the drying rate of clothes in a rotating F-tsum based on the instantaneous resistance value between tW when it comes into contact with the clothes, and the drying operation is performed based on the result of comparing the detection output with a set reference value. In a dryer operating device configured to control a dryer, there is provided a determination circuit that determines the amount of clothes to be dried based on the output from the detection circuit, and a determination circuit that determines the setting standard based on the determination result of the determination circuit. The structure is such that the value is changed, thereby preventing malfunctions due to the size of the amount of clothes to be dried (yc).

[Cast of the invention]

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

In Figure 1, 1 is a detection circuit, which is a rotating drum (
It is provided in such a way that clothing in the container (not shown) comes into contact with it, and has a pair of electric currents 11M1&, 1bt-, and the electric IM1a, 1tB
15yc Detects the instantaneous resistance value of the clothing in contact,
Each time it is detected, a detection voltage Vd proportional to the instantaneous resistance value is outputted in the form of a bus. In this case, when the amount of clothes to be dried is relatively large, the electrode 1a.

Since the contact pressure of the clothing against 1b is sufficient and the frequency of contact is high, the detected voltage Vd is as shown in Fig. 2(A).
As shown in the figure, the output cycle becomes shorter as it closely follows the changing state of Rep/I/ (see double-dashed line) corresponding to the actual drying rate.Also, when the amount of clothes to be dried is relatively small, , the contact pressure and contact frequency of clothing with respect to the electricity tfi1ae1b decreases, so the detected voltage Vd becomes a little more than 9 degrees below the level /V corresponding to the actual drying rate, as shown in Figure 2 (To), and the output cycle decreases. becomes longer. On the other hand, 2
is a timer circuit having a changeover switch 2a, which operates the timer for a certain period of time at the beginning of the drying operation, turns on the contacts (C-a) of the changeover switch 2a during the dormitory period, and also turns on the timer circuit. 1 = 1 contact (c
= b) Turn on the interval. 6 is a storage circuit that receives the detection voltage Vd @ between the contacts (c and b) of the changeover switch 2a;
Although this is not shown, it has a capacitor as a storage element that is instantly charged to the peak value of the detection voltage Vd.
It has a resistor that discharges the charge charged in the capacitor, and outputs the input detection voltage Vd while decreasing it at a gradual decreasing rate according to the time constant of the capacitor and the resistor. As a result, the detection voltage V'd output from the memory circuit 3 changes as shown in FIG. K will tell you to do it.

4 is the contact point (a-a
), which outputs an average voltage Va f obtained by averaging the detected voltage V di input during a certain period of time at the beginning of operation. In this case, the above average voltage V
The level μ of a is the peak value and output frequency of the detection voltage Vd,
In other words, it follows the size of the amount of clothes to be dried and becomes more precise.
Therefore, the amount of clothes to be dried can be determined based on such average voltage Va. In this case, the amount of clothes to be dried may be determined by counting the number of passes of the detection voltage Vd input in a certain period of time. Now, 5 is a correction circuit that receives the average voltage Va, which is preset at a drying rate of 90, for example.
%, and outputs a reference voltage V2I'Ik which changes in height according to the level μ of the input average voltage Va. 6 is the detection voltage V'
d and the reference voltage Vs as comparison inputs, and when the relationship of V'd<Vs is established, the stop command signal 8 is output.
0t? Output. 7 is a control circuit 8't as well as a comparison circuit 6.
- This is a stop circuit, which receives the stop signal SO when it is output and cuts off the power to the drying heater 9.

Next, the operation of the above structure will be explained. When clothes are put into a rotating drum (not shown) and drying operation is started, the heater 9 for drying operation is energized and generates heat, and the rotating drum and blower (not shown) are turned on. This agitates the clothes in the rotating drum, and the air heated by the dryer 9 is supplied into the rotating drum by the blower (C). 1118.1b
Clothes come into contact with 1c intermittently, and a detection voltage Vd is output from the rc detection circuit 1 each time there is contact (
See Figure 2. In addition, at the beginning of the drying operation, the timer circuit 2 performs the timer operation for a certain period of time, and the changeover switch 2
In order to turn on between the points (C-a) of point a, the determination circuit 4 which receives the detected voltage Vd during this period outputs an average voltage vaft of fcVpeμ according to the IkVC of the clothes placed in the rotating drum. It becomes like this. Then, when the average voltage Va is output in this way, the correction circuit 5 outputs the average voltage V
When a is relatively high (that is, when there is a large amount of clothes to be dried), the reference voltage V at a relatively high level μ as shown in FIG.
When the average voltage Va is relatively low (that is, when the amount of clothes to be dried is small, as shown in FIG. 3), a reference voltage Vs with a relatively low repetition μ is output. After the timer operation of the timer circuit 2 described above is completed, the changeover switch 2& is switched to the state where the contacts (c and b) are turned on, so that the detection voltage V' shown in FIG. 5 is output from the memory circuit 5.
d will now be output. Thereafter, the detection voltage V'd is differentiated according to the increase in the drying rate of the clothes as the drying operation progresses, and when the final relationship rCV'd (Vs) is reached, the stop command signal So is output from the comparator circuit 6. Because of the output, the stop circuit 7 cuts off the power to the drying operation heater 9.

This stops the drying operation. In this case, the reference voltage Vs is set to a level corresponding to a drying rate of 90%, so the rotation F) and the clothes in the room have a drying rate of 90%.
It is dried to a state of A (suitable for ironing).

According to the above-mentioned example, when the amount of clothes to be dried is small, a phenomenon occurs in which Vpeμ of the detection voltage V'd becomes slightly p below the level μ corresponding to the drying rate near the dormitory. When drying, Vbeμ of the reference voltage v8 is automatically lowered according to the amount of clothes to be dried, so the operation stop time will not be inadvertently brought forward as in the past.
What is the degree of change in such a reference voltage Vs? If you set it appropriately, you can control the power cutoff timing of the heater 9 for drying operation. This can be done extremely accurately regardless of the amount of clothes to be dried.

〔Effect of the invention〕

According to the rc of the present invention, as is clear from the above explanation,
A detection circuit that has electrodes in contact with clothing in the rotating drum and detects the instantaneous resistance value between the electrodes, a storage circuit that stores the detected instantaneous value outputted from this detection circuit for a predetermined period of time, and The present invention has a control circuit that compares the output with a set reference value and controls the heater for drying operation based on the comparison output, and can achieve the excellent effect of accurately controlling the heater for drying operation without drying. .

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a block diagram, FIG. 2 is an output waveform diagram of a detection circuit, and FIG. 3 is an output waveform diagram of a storage circuit. In the figure, 1 is a detection circuit, 1 a, 1 bU [41, 3 is a storage circuit, 4 is a judgment circuit, 5 is a correction circuit, 8 is a control circuit,
9 is a heater for drying operation. Figure 1 fIA2 Figure AI ■ BI d

Claims (1)

[Claims] 1. Storage of a detection circuit that has electrodes in the rotating drum that are in contact with clothing and detects all the instantaneous resistance values between the electrodes, and a storage circuit that stores the detected instantaneous values output from this detection circuit for a predetermined period of time. Output from the circuit and setting/setting reference value? and a control circuit that compares and controls a heater for drying operation based on the comparison output, a determination circuit that determines the amount of clothes to be dried based on the output from the detection circuit at the beginning of the drying operation, and this determination circuit. A dryer operating device i-, characterized in that it is provided with a correction circuit that changes the Settomo reference value based on the determination result of