JPH02182296A - Drying machine - Google Patents

Abstract

PURPOSE:To simplify composition and contrive the shortening of the required time to stop by stopping a from temporarily at a specified position after the drum is rotated at a speed lower after first detection output is received from a position sensor, when the rotation of the drum is stopped, and by rotating the drum at a slight speed later, to stop the drum when second detection output is received from the position sensor. CONSTITUTION:When the rotation of a drum 16 is stopped, then first detection output is received from a position sensor 25, and after that, the drum 16 is rotated at a lower speed for t1 seconds, and after that, it is electromagnetically damped, and it is temporarily stopped at the point Q of a position near the front of a position where an entrance 4a and an opening section 16a are met with each other. Besides, after this, the drum 16 is rotated at a slight speed, and when second detection output is received from the position sensor 25, then a motor 9 is dielectrified and stopped. Accordingly, the drum 16 is not reversely rotated, and so the composition of reverse rotation is not needed, and the composition can be simplified. Besides, the drum 16 is rotated at the slight speed only at a slight distance between a point P, and the point Q near the front of the point P, and so a time required to stop can be shortened. Besides, the only one position sensor 25 is set, and so the composition can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a dryer comprising a drum having an opening in its body that corresponds to an inlet and an inlet of a material to be dried.

(Prior Art) In this type of dryer, for example, a top-loading type dryer, when the rotation of the drum is stopped at the end of the drying operation, a It was necessary to align the entrance and exit of the material to be dried. As an example of such a dryer,
The one shown in Japanese Patent No. 183099 is provided.

In this case, a position sensor is installed that outputs a detection output when the inlet/outlet of the material to be dried in the main body meets the opening of the drum, and when the rotation of the drum is stopped, the detection output is output from the position sensor. When this happens, the motor that rotates the drum is electromagnetically braked to stop the drum, and then the drum, which has rotated too much due to inertia, is reversed.
When a detection output is received from the 1f position sensor, the motor is electromagnetically braked to stop the drum. As a result, the inlet/outlet of the material to be dried is almost aligned with the opening of the drum.
The rotation of the drum is stopped.

(Problems to be Solved by the Invention) In the conventional configuration described above, it is necessary to have a configuration in which the drum is reversed, so it is necessary to apply tension to the belt that transmits the driving force of the motor to the drum! It had the disadvantage of complicating the configuration, such as requiring two tension pulleys, one forward and one reverse.

In order to eliminate this drawback, the drum rotates only in one direction, and when the drum rotation is stopped, electromagnetic braking is applied to the motor that rotates the drum when it receives a detection output from the position sensor. Then, the drum is rotated in the same direction at a speed much slower than normal rotation, that is, at a speed at which the drum immediately stops when electromagnetic braking is applied (e.g., one rotation in 2 minutes), and then the drum is rotated again in the same direction. It has been proposed to electromagnetically brake the motor to stop the drum when it receives a detection force from a position sensor.

However, with this one, the drum is rotated at a fairly slow speed.
There was a problem in that it had to be rotated close to the rotational speed and it took a considerable amount of time to stop.

In contrast, a method disclosed in Japanese Patent Laid-Open No. 63-183098 is provided. With this one, the drum stops +
A first position sensor that outputs a detection output when the reference position is reached, and a second position sensor that outputs a detection output when the entrance and exit of the material to be dried in the main body and the opening of the drum are aligned. To stop the rotation of the drum, electromagnetic braking is applied to the motor to stop the drum when a detection output is received from the first position sensor, and then the drum is stopped at a fairly slow speed, that is, when electromagnetic braking is applied, the drum is stopped immediately. After the drum is rotated in the same direction at a stopping speed, electromagnetic braking is applied when a detection output is received from the second position sensor to stop the drum. However, this one uses two position sensors.
The configuration becomes complicated because it requires 1 unit. Furthermore, when the drum is stopped by electromagnetic braking in response to the detection output from the first position sensor, the drum may rotate too much and pass the detection position of the second position sensor. We are trying to reverse the drum that has been overcooked, and as expected, we need a configuration to reverse the drum, so ++1-
There was a problem that it became complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to simplify the configuration while being able to stop the rotation of the drum when the 'J' inlet of the material to be dried and the opening of the drum are almost aligned. To provide a dryer that can shorten the time required for drying.

[Structure of the Invention] (Means for Solving the Problems) The dryer of the present invention includes a drum having an opening in the body that corresponds to the entrance and exit of the material to be dried, and the drum is moved in one direction by a motor. The drum is rotatably driven, and includes a position sensor that outputs a detection output when the entrance and exit port and the opening are aligned, and a load amount detection means that detects the amount of material to be dried in the drum. , when drum stop No. 16 is input, when the first detection output is received from the position sensor, the drum is moved at a speed that is less than 11 slower than before and according to the load detection output from the load detection means. Then, when the motor is braked after a predetermined period of time, the motor is energized at a duty ratio that causes it to rotate at a speed that causes it to temporarily stop at a position near the position where the entrance and the opening meet, and after the motor is temporarily stopped due to the braking, The motor is controlled to be energized at a duty ratio that rotates the drum at a minute speed, and when a second detection output is received from the position sensor, the motor is cut off and the drum is stopped. It has the following characteristics.

(Function) According to the above means, when the rotation of the drum is stopped, after receiving the first detection output from the position sensor, the drum rotates at a slower speed than before for a predetermined period of time, and then is braked and moves to the entrance/exit. The drum is temporarily stopped at a position near the position where it meets the opening, and after this, the drum is rotated at a very small speed, and when it receives the second opening detection output from the position sensor, the motor is cut off and stopped. Therefore, since the drum is not reversed,
The configuration can be simplified. In addition, since the drum is rotated at a very small speed between the position where the entrance and exit meet and the vicinity of this position, it takes 11.5 seconds to stop.
You can shorten the time. Historically, since only one position sensor is required, the configuration can be integrated into the cylinder.

(Example) An example of the present invention will be described below with reference to the drawings.

First, in FIG. 2, ] is a main body, for example, an outer box, which is composed of a main outer box part 2 and a cover 3 that closes a rear opening of the main outer box part 2. The outer box main portion 2 includes an upper cover portion 4 and a body portion 5 having a substantially U-shaped cross section. As shown in FIG. 4, the upper cover portion 4 is formed with an entrance 4a for storing items to be dried, such as clothing, and the outer box 1 is provided with the entrance 4a on, for example, the upper surface. Further, the upper cover part 4 is provided with a lid 6 for opening and closing the entrance/exit 4a, and
An operation panel 7 shown in FIG. 5 is also provided. Now, A shown in FIG. 3 is a unit covered by the above-mentioned outer box 1, and this unit 1-A will be described below.

In FIG. 3, 8 is a plywood made of plastic, for example, and 9 is a motor fixed to the base plate 8 via a motor support 10. One support plate 11 is erected at the rear end of the base plate 8 by screwing. Also, the base plate 8
At the front end of the support plate 11, the other support plate 12 is erected by screws, facing the support plate 11. Reference numeral 13 denotes a casing, which has its front and rear lower ends connected to support arm portions 11a1.2a protruding from the support plate 1112 with screws 11. It has been supported for a long time. In this casing 13, a fan 14 having, for example, a double-blade shape is rotatably disposed. Reference numeral 15 denotes a drum support member, and its front and rear lower ends are provided with support arms 11 and 12 projecting from support plates 11 and 12, respectively.
b (only one is shown), and are supported by screws, respectively.

Reference numeral 16 denotes a drum for storing the material to be dried, which has a shaft portion 17 provided at the center of the right side surface in FIG. is rotatably provided between the drum support member 15 and the casing 13 by being supported by the drum support member 15 via a bearing 19 . Now, the above drum 1
6 is formed with an opening 6a (see FIG. 4) that corresponds to and has the same size as the entrance 4a, and the drum lid 2 is opened and closed to open and close this opening 16a.
0 is provided so that it can slide in the circumferential direction (third
(see figure). Reference numeral 21 denotes a pressing member that slidably presses the drum lid 20, and this is attached to the body of the drum 16.

Here, as shown in FIG. 1, a mounting part 22 is provided at the upper end of the drum support member 15 so as to be opposed to the body part of the drum 16. 23 is the mounting part 22. month 22
For example, a reed switch is disposed on the back surface of the drum 16 so as to face the presser member 21 of the drum 16, and 24 is a magnet attached to the presser member 21 to make a pair with the reed switch 23. The magnet 24 constitutes a position sensor 25.

This position sensor 25 is connected to the entrance/exit 4a and the opening 16.
When it matches with a, that is, the magnet I is attached to the reed switch 23.
・Detection signal Sa= which is the detection output when 24 approaches
outputs rlJ, and otherwise outputs the detection signal Sa,=r
It is designed to output OJ. Incidentally, 26 and 27 are reinforcing plates that extend between the casing 13 and the drum support member 15 and are screwed together.

In addition, when the fan 14 rotates in the casing 13, as shown in FIG. 4, the warm air inside the drum 16 is sucked into the left side of the fan 14 through the filter set 28 and the intake port (not shown), and After being guided to the casing cover 29 shown in FIG. will be returned to. At the same time, the air outside the outer box 1 is sucked into the right side of the fan 14 in FIG. 4 from the outside air intake port 3a of the cover 3 through the intake cover 34, and as described above, After exchanging heat with the air from the drum 16 flowing on the left side, the air is discharged from the outside air outlet 8a of the base plate 8. The air from the drum 16 is dehumidified by the heat exchange, and the water generated by the dehumidification is drained into the drain hole 3 provided at the lower part of the connecting duct 30.
0a and the drainage hole 8b of the base plate 8 to be discharged to the outside. In addition, the pulley 35 and tension pulley 36 attached to the rotating shaft of the motor 9 and the drum 1
A belt 37 for driving the drum is passed between the drum 16 and the motor 9, and the drum 16 is moved in one direction by the motor 9.
It is designed to be rotationally driven in the direction of arrow B shown in the figure.

In addition, the pre-38 attached to the rotating shaft of the motor 9
A belt 40 for driving the fan is passed between the pulley 39 of the fan 14 and the pulley 39 of the fan 14.
is designed to be rotationally driven. Furthermore, in FIG.
5, which outputs an electrical signal according to the resistance of the cloth.

On the other hand, in FIG. 5 showing the operation panel 7, 42 is a start/stop switch, 43 is a switch, 44 is a power switch, and 45 to 47 are indicator lamps such as light emitting diodes.

Further, in FIG. 6 showing the electrical configuration, 48 is an operation control circuit for controlling the drying operation, and this is configured to include a microcomputer.

Reference numeral 49 indicates a clock pulse generation circuit that provides clock pulses to the operation control circuit 48, and reference numeral 50 indicates a dryness detection circuit, which detects the dryness of the object to be dried based on the electric signal given from the electrode 41. When the dryness detection value reaches a predetermined value, a dryness determination signal is given to the operation control circuit 48.

Reference numeral 51 denotes a cloth amount detection circuit which is a load amount detection means, and this detects the amount of the object to be dried, for example, the amount of cloth, based on the degree of contact between the object to be dried and the electrode 4 based on the electric signal given from the electrode 41. The cloth amount detection output is given to the operation control circuit 48. 52 is a drive circuit for driving the motor 9 and the heater 33; 53 is a rectifier circuit that serves as a power source for the operation control circuit 48; and 54 is a lid opening/closing detection switch for detecting the opening/closing state of the lid 6.

Next, the operation of the above configuration will be explained with reference also to FIGS. 7 to 9.

FIG. 7 shows the contents of the operation control circuit 48 (and the part of the stored control program that stops the rotation of the drum 16. First, in FIG. 7, the start/-time stop switch 42 is operated. When the drying operation is started, step S] is executed to set the duty for controlling the energization of the motor 9.
The ratio X1 is initialized, and Xl is set to, for example, 0.6 (suitable for a state where there is no clothing in the drum 16).

Here, the duty ratio is the ratio of the on time when the motor 9 is controlled on and off in a pulse manner, and as shown in FIG. 8, the on time is the sum of the on time a1 and the off time b When, duty ratio X = a /
Defined in b. Therefore, the above 0. 0.6 when 6
It shows that it is turned on for 2 seconds and turned off for 0.4 seconds.

Then, when the drying operation is started, the process moves to step S2, and it is determined whether or not the drum stop]1- signal has been input, and since it has not, the process goes to "NO" and the process moves to step S3. In this step S3, the amount of cloth accommodated in the drum 16 is detected, and the amount of cloth is detected by the cloth amount detecting means 5, for example, two minutes after the start of operation. Thereafter, the process moves to step S4, and the duty ratio X1 is updated in accordance with the cloth amount detection output from the cloth amount detection means 51. This duty ratio X1 is updated so that it becomes larger as the amount of cloth increases, and will be described in detail later.

Now, when the drying operation ends or when the start/- time stop switch 42 is operated to temporarily stop the drying operation, a drum stop signal is input, and r is turned on in step S2.
Proceed to YESJ and proceed to step S5. In this step S5, the detection signal Sa from the position sensor 4 is read and a one-time judgment is made as to whether or not it is 5a-rll. And Sa=
In the case of rlJ, when the entrance/exit port 4a and the opening 16a of the drum 16 match, that is, when the magnet 24 is located at the point P in FIG. 9, in this case, rYES
Proceed to step J and proceed to step S6. In step S6, energization of the motor 9 is controlled at the duty ratio X1. Here, when the motor 9 is energized and controlled with the duty ratio When the drum 16 is rotated for a predetermined time of t1 seconds and then braked, for example by electromagnetic braking of the motor 9, the magnet 24 is moved to a position near the position where the entrance/exit 4a and the opening 16a meet, for example, before the point P in FIG. The drum] 6 is set to stop at a point Q, which is approximately 100 degrees. In this case, it has been confirmed through experiments that if the drum 16 is rotated at a substantially constant speed and electromagnetically braked, it will stop at substantially the same position regardless of the amount of material to be dried. When braking the drum of a dryer, experimental results have shown that the braking distance becomes longer as the amount of material to be dried increases, but this is because the material to be dried is concentrated at the bottom of the drum. It is thought that this is because the greater the number, the greater the rotational resistance of the drum, which is more effective at braking. Therefore, when the energization control of the motor 9 at the duty ratio
It has rotated to a certain degree, and in this state, the process advances to rYEsJ in step S7, and then to step S8. In this step S8, the motor 9 is electromagnetically braked, and specifically, the motor 9 is energized for a half-wave of t2 seconds. As a result, the magnet 24 is placed at a position near the front of the position where the entrance/exit 4a and the opening 16a meet, that is, the point Q in FIG.
The drum 16 temporarily stops at the position.

Thereafter, the process proceeds to step S9, where the motor 9 is energized at a duty ratio X2 of approximately 0.04, for example. This duty ratio X2 moves the drum 16 at a minute speed, that is, the motor
When the power is cut off, the drum 16 is rotated at a speed that stops immediately, and the drum 16 rotates at this very small speed. Next, the process moves to step S10, reads the detection signal Sa from the position sensor 25, and determines whether Sa=“1” or not.
Make the decision for round 1-1. When the magnet I.24 reaches point P from point Q in FIG. 9 due to the rotation at the minute speed, the inlet/outlet 114a and the opening 16a align, and the detection output Sa from the position sensor 25 becomes Sa -r 1.
J, the process goes to YESJ in step SIO, moves to step Sll, cuts off the power to the motor 9, and stops the drum 16. As a result, the entrance 4a and the opening 16
The rotation of the drum 16 stops when the a and a are aligned.

According to this embodiment having such a configuration, when stopping the rotation of the drum 16, after receiving the first detection output 5a=rlJ from the position sensor 25, the drum 16 is rotated at a slower speed t1. After rotating for a second, electromagnetic braking is applied, and the drum is stopped at a point Q (see Fig. 9) near the position where the entrance/exit 4a and the opening 16a meet, and after this, the drum 1]7 6 rotates at a minute speed, position sensors 25 to 21i11
When the eye detection output Sa=rlJ is received, the motor 9 is cut off and stopped. Therefore, since the drum] 6 is not inverted, a reversing configuration is unnecessary and the configuration can be simplified. Also,
A point P where the entrance/exit 4a and the opening 16a meet,
Since the drum 16 is rotated at a very small speed only during a short period of time between the point Q and the vicinity of this position, the time required to stop the drum 16 can be shortened. Furthermore, since only one position sensor 25 is provided, the configuration can be simplified.

In the above embodiment, the position sensor 25 is composed of the reed switch 23 and the magnet 24, but is not limited to this, and may be composed of a Hall element and a magnet, for example.

[Effects of the Invention] As is clear from the above description, the present invention includes a drum having an opening in the body that corresponds to the entrance and exit of the material to be dried, and the drum is driven to rotate in one direction by a motor. The device is equipped with a position sensor that outputs a detected force when the entrance and exit port and the opening are aligned, and a load amount detection means that detects the amount of material to be dried in the drum, and a drum stopper. When a signal is received, when the first detection output is received from the position sensor, the drum is moved at a speed slower than before and according to the load detection output from the load detection means, and for a predetermined period of time. energization is controlled to the motor at a duty ratio that causes it to rotate at a speed that causes it to temporarily stop at a position near the position where the doorway and the opening meet when the motor is subsequently braked;
A configuration in which the motor is controlled to be energized at a duty ratio that rotates the drum at a minute speed, and when a second detection output is received from the position sensor, the motor is powered off and the drum is stopped. As a result, the rotation of the drum can be stopped when the inlet/outlet of the material to be dried is almost aligned with the opening of the drum, the configuration can be simplified, and the time required to stop the drum can be shortened. It has excellent effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view of the main parts, Fig. 2 is a perspective view of the whole, Fig. 3 is a perspective view with the outer box removed, and Fig. 4 is a perspective view of the main part. 5 is a front view of the operation panel, 6 is an electrical configuration diagram, 7 is a flowchart, 8 is a time chart, and 9 is a schematic longitudinal view for explaining the operation. FIG. In the drawings, 1 is an outer box (main body), 4a is an entrance, 16 is a drum, 6a is an opening, 25 is a position sensor, and 51 is a cloth amount detection circuit (load amount detection means).

Claims (1)

[Claims] 1. The drum is equipped with a drum having an opening in the body that corresponds to the entrance and exit of the material to be dried, and the drum is driven to rotate in one direction by a motor, and the drum has an opening that corresponds to the entrance and exit of the material to be dried. a position sensor that outputs a detection output when the drum is aligned, and a load amount detection means that detects the amount of material to be dried in the drum, and when a drum stop signal is received, the first detection output is output from the position sensor. when the drum is received, the speed is slower than before and according to the load amount detection output from the load amount detection means, and when the brake is further applied after a predetermined period of time, the drum is moved just before the position where the entrance and exit port meet with the opening. The motor is energized at a duty ratio that causes the drum to rotate at a speed that causes it to temporarily stop at a nearby position, and after the brake is temporarily stopped, the motor is energized and controlled at a duty ratio that causes the drum to rotate at a very small speed, and the drum is rotated at a minute speed. A dryer characterized in that when a second detection output is received from a sensor, the motor is cut off and the drum is stopped.