JPH02220698A - Dryer - Google Patents

Abstract

PURPOSE:To precisely judge the sorts of cloth to be dried without troubling a user and decrease the sorts of switch input by providing a judgment means by which the sorts of cloth to be dried are judged according to a ratio of the detected weight result of a weight detection means to the contact frequency detected result of a contact frequency detector. CONSTITUTION:When an electrode 9 is equipped in a rotary drum 2 so that the object to be dried comes in contact with the electrode 9, the contact frequency to the electrode varies depending upon the sorts of cloth to be dried, cotton or synthetics, assuming that the cloth to be dried has the same weight (including moisture weight). The weight of the cloth to be dried is detected by a weight detection means 36, and the contact frequency of the cloth to be dried is detected by a contact frequency detection means 29. The sorts of cloth to be dried are judged by a judgment means of a microcomputer 26 according to the ratio of the two detected results. Therefore, the judged result conforming to the sorts of the cloth can be precisely obtained without troubling a user.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a dryer equipped with a determining means for determining the type of cloth of an object to be dried.

(Prior Art) Conventionally, as is well known, in a dryer, an object to be dried is dried within a rotating drum while being agitated by the rotation of the rotating drum.

By the way, in dryers, the types of fabrics to be dried can be roughly divided into cotton and synthetic fibers, and depending on the type of fabric to be dried, the drying operation control mode is changed to suit the type of fabric. It is well known to carry out drying control (for example, control to prevent insufficient drying or control to prevent overdrying).

In this case, conventionally, the determination of the type of the material to be dried (]i is left to the messenger III, and the dryer has /li
A selection switch for each type is provided.

(Problem to be Solved by the Invention) However, in the above case, the usage fee must determine the type of the material to be dried (Ii), and the determined type must be input using a selection switch. This is troublesome. Particularly in dryers, where the number of types of switch inputs on the stone side is increasing, there is a strong desire to reduce the number of input types, and the inputs from the selection switch cannot be ignored.

Therefore, an object of the present invention is to be able to appropriately determine the type of cloth of the material to be dried without bothering the user;
To provide a dryer in which it is possible to reduce the number of manual switches required.

[Structure of the Invention] (Means for Solving the Problems) The present invention has been made with attention to the following points. That is,
When an electrode is provided in the rotating drum so that the material to be dried is in contact with the material to be dried, the weight (including the amount of water molecules fl) of the material to be dried is determined depending on whether the material to be dried is cotton or synthetic fiber. When they are the same, the frequency of contact with the electrodes is different. Therefore, it is possible to determine the type of cloth of the object to be dried based on the ratio of the weight and the frequency of contact.

Accordingly, the present invention provides a weight detection device for detecting the weight of the dried material in a device in which the material to be dried is dried within a rotating drum while being agitated by the rotation of the rotating drum.
a contact frequency detection means having a contact detection electrode and detecting the frequency of contact of clothes stirred in the rotating drum with the electrode; and a weight detection result by the weight detection means and a contact frequency detection means based on the contact frequency detection means. The present invention is characterized in that it is provided with a determining means for determining the type of cloth of the object to be dried based on the ratio with the contact frequency detection result.

(Function) The weight of the object to be dried is detected by the weight detection means, and the contact frequency of the object to be dried is detected by the contact frequency detection means. The determination means determines the type of cloth of the object to be dried based on the ratio of the rain detection results. In this case, as described above, the difference in the type of cloth to be dried is determined by the ratio of its weight and frequency of contact, so the f111 means produces a determination result that matches the type of /+i. In this way, the type of the material to be dried /Ii is automatically determined appropriately.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

First, referring to FIG. 2, the schematic structure of the dryer will be explained.

1 is an outer box, 2 is a rotating drum provided inside the outer box 1 and serves as a drying chamber 3, 4 is a fan chamber provided at the rear of the rotating drum 2 and also serves as a heat exchange room, 5 is this fan chamber 4 This is a heat exchange type double-blade fan installed so as to partition this area into front and rear parts, and based on the air blowing action of this fan 5,
As shown by arrow A, air is sucked from the rear of the rotating drum 2 to the front side of the fan chamber 4 and returned to the inside of the rotating drum 2 (drying room 3) through the communication duct 6, while outside air is drawn as shown by arrow B. It is sucked into the rear side of the fan chamber 4 and discharged to the outside of the machine. Reference numeral 7 denotes a heater provided in the discharge portion 6a of the communication duct l-6, which heats the recirculated air into the rotary drum 2. As a result, warm air is supplied to the inside of the rotating drum 2 and thus to the drying chamber 3, and after drying the material to be dried, the hot air is exchanged with outside air in the fan chamber 4. Thus, the material to be dried is dried within the rotary drum 2 while being stirred by the rotation of the rotary drum 2. Reference numeral 8 denotes a motor located on the inner upper part of the outer box 1 to rotate the rotating drum 2 and the fan 5; 9 indicates a contact detection electrode disposed on the front fixed plate 10 facing inside the rotating drum 2; 9 outputs an electric signal (a signal to 7 corresponding to the cloth resistance) when the material to be dried comes into contact with it. Reference numeral 11 denotes a drying chamber door that opens and closes the front opening of the drying chamber 3. 12 is a door switch that detects whether the drying chamber door 11 is opened or closed. Note that 13 is a circuit board on which an operation control circuit 18 (see FIG. 1), which will be described later, is mounted, and 14 is an operation panel.

In FIG. 3 showing this operation panel] 4, 15 is a display consisting of a 7-segment light emitting diode, 16 is a power switch, 17 is a course changeover switch, 18 is a heater strength changeover switch, 19 is a start switch, 20 or 25 is a display lamp for displaying various setting contents.

Next, in FIG. 1, 26 is a microcomputer;
Reference numeral 7 indicates a clock pulse generation circuit that provides clock pulses to the microcomputer 26, and reference numeral 28 indicates a contact detection circuit. Detects contact with dry matter and sends the contact detection signal to the microcomputer 26.
give to The microcomputer 26 has the function of counting this contact detection signal at a predetermined time f and detecting the contact frequency based on the counted value. Therefore, the microcomputer 26 and the electrode 9 and the contact detection circuit 28 constitute a contact frequency detection means 29. Note that 30 is a dryness detection circuit, which detects the dryness of the object to be dried based on the electric signal given from the electrode 9. When the detected dryness value reaches a predetermined value, drying is started. A determination signal is given to the microcomputer 26. 31 is a drive circuit for turning on and off the heater 7 and motor 8; 32 is a microcomputer 2;
This is a rectifier circuit that serves as the power source for 6.

On the other hand, 33 shown in FIG. 2 is a rotation detection device for detecting the rotation of the motor 8, and this includes a disk 34 attached to the rotating shaft of the motor 8, and a peripheral edge of the disk 34. and a photointerrupter 35 attached to the outer box 1 so as to sandwich the outer box 1. Light-transmitting notches (not shown) are formed in two locations on the peripheral edge of the disk 34 in a point-symmetrical manner, and as the disk 34 rotates, the photointerrupter 35 is inserted into the notches. This is used to provide a detection signal to the microcomputer 26 each time the sensor passes by. The microcomputer 26 has a function of counting this detection signal, detecting the amount of rotation based on the count value, and detecting the weight of the material to be dried (including water molecules im) based on the amount of rotation. Therefore, this microcomputer 26 and the rotation detecting device 33 constitute a weight detecting means 36.

Now, the microcomputer 26 has a program for operation control stored in its memory, and functions as an operation control means due to its software configuration. It also functions as a part of the system and a determination means.

Regarding the operation of the above configuration, this microcomputer 30
The function will be explained with reference to FIG. 4.

The flowchart shown in FIG. 4 starts when the power switch 16 is turned on for 1 m. First, the motor 8 is initialized (step 5l) L, and then the motor 8 is energized for a certain period of time, for example, 3 seconds, and then de-energized (step 32).
No material to be dried is stored inside. However, by applying electricity to the motor 8 for 3 seconds, the rotating drum 2 rotates.

Immediately after the motor 8 is energized for 3 seconds, the photo ink actuator 3 of the rotation detecting device 33 waits for a certain period T (a sufficient time for the rotating drum 2 to stop after inertial rotation).
5 and detects the inertial rotation amount Ka of the drum 2 (step S3).

After that, the user stores the material to be dried in the rotating drum 2,
Then, when the start switch 19 is turned on (determined in step S4), the motor 8 is energized again for 3 seconds (step S5), and for a certain period of time T, as described above,
The detection signal from the photointerrupter 35 of the rotation detection device 33 is counted to detect the inertial rotation iKb of the drum 2 (step S6). This inertial rotation QKb in the state where the dried material is accommodated and the inertial rotation i in the state where the dried material is not accommodated.
ff of the material to be dried based on the comparison result.
l m W is detected (step S7). Note that if the inertial rotation m Ka in the state where the drying material is not stored is known in advance, there is no need to detect the inertial rotation fika, but there may be slight manufacturing variations between dryers. Considering this, this weight detection method is effective.

After this, the motor 8 and the heater 7 are energized and drying operation is started (step S8). Thereafter, the contact detection signal from the contact detection circuit 28 is counted at a fixed time to detect the contact frequency S (step S9). Next, the type of cloth of the object to be dried is determined based on the ratio of the weight W of the object to be dried (detection result in step S7) and the contact frequency S (detection result in step S9) (step 510 ). That is, the weight W of the object to be dried is divided by the frequency of contact S, and the type of cloth of the object to be dried is determined by the division.

In other words, when the material to be dried that is stirred in the rotating drum 2 comes into contact with the electrode 9, the weight of the material to be dried, ff1 (the weight of water) (including) are the same, the frequency of contact with the electric i9 is different. The contact frequency of synthetic fibers is considerably higher than that of cotton.

Therefore, it is possible to determine the type of cloth of the object to be dried based on the ratio of the weight and the frequency of contact, and if the above division value (W/S) is large, it is determined that the type of cloth is cotton. However, if the division value is small, it is determined that the type of cloth is synthetic fiber. Thereafter, predetermined drying operation control is performed and the drying operation is ended. The determination result of the city type of the above dried material is as follows:
It is used to prevent under-drying or over-drying of the material to be dried.

Note that the specific usage of this determination result is quite complicated, so the explanation will be omitted.

In this way, according to this implementation 1% 1, when the electrode 9 is provided in the rotating drum 2 so that the material to be dried comes into contact with it, there is a difference between when the material to be dried is cotton and when it is synthetic fiber. When the city ff1 (including water weight) of the material to be dried is the same,
Focusing on the fact that the frequency of contact with the electrodes is different, the weight detection means 36 detects ff1ffi of the material to be dried,
The contact frequency detection means 29 detects the contact frequency of the object to be dried, and the determination means in the microcomputer 26 determines the type of cloth of the object to be dried based on the ratio of the rain detection results. A determination result suitable for the type can be appropriately obtained without bothering the user.

In particular, the rotation detection device 33 is included in a part of the ffI amount detection means 36.
In this embodiment, the weight of the object to be dried is detected by detecting the amount of inertial rotation of the rotating drum 2, unlike the case where the weight of the object to be dried is detected based on the frequency of contact, for example, The weight of the material to be dried can be accurately detected regardless of the

Note that instead of the rotation detecting device 33 of the weight detecting means 36, the load current of the motor 8 may be detected, and the weight of the object to be dried may be detected based on the load current.

In addition, the present invention is not limited to the above embodiments, and can be implemented with various modifications without departing from the scope of the invention.

[Effects of the Invention] As is clear from the above description, the present invention is characterized in that the material to be dried is dried in a rotating drum while being agitated by the rotation of the drum, and the weight of the material to be dried is reduced. a weight detection means for detecting; a contact frequency detection means having an electrode for contact detection and detecting the frequency of contact of clothing stirred in the rotating drum with the electrode; and a weight detection result by the weight r:L detection means. and a determination means for determining the type of the can of the dried material based on the ratio of the contact frequency detection result by the contact frequency detection means. The type of cloth can be appropriately determined without bothering the user, thereby reducing the number of types of switch inputs.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a block diagram of the electrical configuration, Fig. 2 is a vertical side view of the dryer, Fig. 3 is a front view of the operation panel, and Fig. 4 shows the control contents. It is a flow chart for explanation. In the figure, 2 is a rotating drum, 7 is a heater, 8 is a motor, 9 is an electrode, 26 is a microcomputer (judgment means) 28
29 is a contact detection circuit, 29 is a contact frequency detection means, '33 is a rotation detection device, '34 is a disc, 35 is a photo interrupter, and 36 is a weight detection means.

Claims (1)

[Claims] 1. A device in which the material to be dried is dried while being stirred in a rotating drum by the rotation of the rotating drum, which includes a weight detection means for detecting the weight of the material to be dried, and an electrode for contact detection; a contact frequency detection means for detecting the contact frequency of clothes stirred in the drum with the electrode; and a contact frequency detection means for detecting the contact frequency of clothes stirred in the drum with the electrode; 1. A dryer comprising: determination means for determining the type of cloth.