JPH037200A - Drive device for rotary drum - Google Patents

Abstract

PURPOSE:To perform alignment of a rotary drum to the door opening/shutting position automatically and enhance the operating easiness and the safety by operating a drum driving motor at a low speed, stopping the motor automatically when the rotary drum has reached the door opening/shutting position, and locking the rotary drum. CONSTITUTION:A motor 7 rotates a rotary drum 1 at the time of washing, drying, and opening/shutting the door, wherein the motor revolving speed and direction are controlled by a motor drive circuit 8. A control device 12 controls the motor 7 and a drum brake 13 on the basis of signals given by a drum position sensor 9, motor revolving speed sensor 10, and zero volt sensor 11 and stops the rotary drum 1 in the door opening/shutting position. The motor 7 is rotated at a low speed under phase control, and when the rotary drum 1 has reached the door opening/shutting position, it is stopped and locked with a brake 13. Alignment of rotary drum 1 in the door opening/shutting position is made automatically, and opening and shutting operation for the drum door 3 is facilitated, and works of putting in the laundry and taking them out dried, wherein risk of burn is also eliminated.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a drive device for a rotating drum used in a drum-type washing machine and a drum-type dryer, and more particularly, the invention relates to a drive device for a rotating drum used in a drum-type washing machine and a drum-type dryer, and in particular, the invention relates to a drive device for a rotating drum used in a drum-type washing machine and a drum-type dryer. This relates to a drive device.

[Conventional technology]

A rotary drum 1 used in a conventional drum-type washing machine or drum-type dryer, as shown in FIG. The drum R3 is slidably provided on the peripheral wall of the drum in order to open and close the drum R3. The rotating drum 1 is rotatably supported within the casing 4. Further, an opening 5 is formed on the upper surface of the casing 4, and this opening 5 can be opened and closed by an outer lid 6 attached to the casing 4. In the conventional drum-type washer/dryer configured as described above, when taking out laundry or drying items from the rotating drum and putting them into the rotating drum, first open the outer lid 6, and then insert the Rotate the rotating drum by hand to position the drum door 3 to face the opening of the casing.
'-After that, slide the drum door 3 to open the drum opening 2.
is opened, and laundry or drying items are put in and taken out from the opened opening 2.

[Problem to be solved by the invention]

In the conventional drum-type washer/dryer as described above, the rotating drum 1 is manually aligned with the opening 5, which makes the operation complicated and poor in workability, and also prevents the drying process from being completed. Immediately after, the drum was at a high temperature, posing a risk of burns. This invention was made in order to solve the above-mentioned problems, and it is possible to automatically align the rotating drum to the door opening/closing position without requiring human labor, improving work efficiency and safety. The purpose is to obtain a driving device for a rotating drum.

[Means to solve the problem]

A rotating drum driving device according to the present invention includes drum position detection means for detecting a predetermined position in the circumferential direction of the rotating drum;
a drum brake that locks the rotating drum in the door opening/closing position; a motor rotational speed detection means that detects the rotational speed of a motor that drives the rotating drum; and a zero volt detection unit that detects zero volts of AC power supplied to the drive motor. means, a motor drive means for controlling energization of the AC power to the drive motor, and a conduction angle of the AC power supplied from the motor drive means to the motor according to an output signal from the motor rotation speed detection means. Controlling the drive motor to a low constant speed by controlling based on the zero volt signal from the zero volt detection means, and stopping the drive motor and turning off the brake drum when an output signal from the drum position detection means is received. and control means for locking and aligning the opening of the rotary drum with the door opening/closing position.

[Effect]

When the control means stops the rotating drum at the door opening/closing position,
The conduction angle of the AC power supplied to the motor by the motor drive means is controlled based on the zero volt signal from the zero volt detection means in accordance with the output signal from the motor rotation speed detection means, thereby controlling the rotation speed of the motor to a predetermined level. The rotating drum is controlled to a constant speed and rotated, and when the drum position detection means detects a predetermined drum position, the control means stops the motor and at the same time operates the drum brake to lock the rotating drum. This causes the rotating drum to stop at the door opening/closing position, and its opening to be automatically aligned with the opening in the casing. Therefore, in the present invention, by automating the manual positioning of the drum opening, work efficiency can be improved, and safety against burns and the like can also be improved.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating the basic configuration of the rotary drum drive device of the present invention applied to a drum-type washer/dryer. In the figure, a rotary drum 1 is rotatably supported within a casing 4 as in FIG. 10. An opening 2 provided in the peripheral wall of the rotating drum 1 is opened and closed by a drum door 3, and the drum door 3 is provided so as to be slidable in the circumferential direction of the drum. A rotating drum drive device for controlling the rotating drum 1 to stop at a predetermined position in the rotational direction (a position where the drum door 3 faces the opening 5 of the casing 4) includes a motor 7 and a motor drive diagram 1.
s8, drum position detection bud 9, motor rotation speed detector 1
It is equipped with a zero volt detector 11 for detecting zero volt of the 01 AC power supply, a control device 12, and a drum brake 13. The motor 7 drives the rotary drum 1 during washing/drying and when opening/closing the door, and the rotational speed and direction of the motor 7 are controlled by a motor drive diagram 1s8. As shown in FIG. 2, the motor drive circuit 8 is composed of a phototriac coupler transistor 82 and a triac (bidirectional thyristor) 83 whose gate input is the secondary output of the phototriac coupler. The triac 83 is connected in series to the power supply circuit of the motor 7 which is connected to the AC power supply 14 . The drum position detector 9 detects a predetermined position (door opening/closing position) of the rotating drum 1 in the rotational direction, and uses, for example, a magnetic sensor or an optical sensor installed in the outer tank (not shown) and the rotating drum. It is composed of a flag such as an iron piece attached to the boob portion, and detects a predetermined position in the rotational direction of the rotary drum 1 by facing the sensor. Also, a rotation speed detection temperature 1 for detecting the rotation speed of the motor 7 is provided.
0, as shown in FIG. 3, a rotation sensor 101 that generates a pulse signal with a frequency proportional to the rotational speed of the single motor 7, and a frequency-voltage that converts the pulse frequency output from this rotation sensor 101 into a DC voltage. Converter 102 and power supply voltage ■. 0, a reference voltage Vref set by a resistor R and a variable resistor VR, and a comparator 103 that compares the output voltage from the frequency-voltage converter 102. When it is large, it outputs an "L" signal, and when it is large, it outputs an "H" signal. Further, the rotation sensor 101 includes a photodiode 10
1a, the transistor 101b that receives the future light, and the photodiode 101a and the slit circle that is phototransistorized! IXI01C, and the slit disk 101C is attached to the rotating shaft of the motor 7. The zero volt detector 11 detects zero voltage at the time when the voltage waveform of the AC power supply 14 changes from positive to negative and from negative to positive.
As shown in Figure 3 (ζ), AClooV
A transformer 111 converts the voltage of about 5V into a voltage of about 5V, a 95ffJJ l 1 2 that rectifies the full waveform of the voltage output from the transformer 111, and a transistor 113 that is turned on and off by the output waveform from the rectifier 112. The output terminal 114 connected to the collector of the transistor 113 outputs a pulse of about 1 ms when zero volts of the AC voltage is detected. Note that R1 to R4 are The control device 12 controls the motor 7 and drum brake 13 based on signals output from the drum position detector 9, motor rotation speed detector 10, and zero volt detector 11, and controls the rotary drum 1 to close the door. The control value N12 is controlled by the CPU 121 that controls the entire system and the rotating drum 1 that is positioned at the door opening/closing position as shown in FIG. RO that stores processing programs, etc. for
M122, a RAM 123 that stores calculation results from the CPU 121 and other data, and an input interface 1.
24 and an output interface 125, which are connected to the CPU 121 via a path 126. A rotating drum position detector 9, a motor rotation speed detector 10, and a zero volt detector 11 are connected to the input interface 124. Also, output interface 1
The motor drive circuit 8 and the brake drive circuit 15 are connected to the motor drive circuit 25. The drum brake] 3 controlled by the brake drive circuit 15 drives the rotating drum 1 . It locks the door in the open/close position, and is provided between the rotating drum shaft (not shown) and the outer tank that houses it. Next, the operation of this embodiment configured as described above will be described in flowchart 1 of FIGS. 6 and 7, and in flowcharts 1 and 9 of FIGS.
This will be explained with reference to the operational waveform diagram in the figure. Flowchart 1 in FIG. 6 shows a procedure for stopping the rotating drum at the door opening/closing position (a position opposite to the opening 5 of the casing 4) when loading or unloading laundry or drying items. The flowchart in FIG. 7 shows the procedure for controlling the motor 7 to a predetermined rotational speed when stopping the door opening/closing position. When the controller 12 enters the door opening/closing position stop control mode with the completion of the laundry washing and dehydration process or the completion of the drying process after dehydration, the program shown in FIG.
In step S1, a rotation speed routine of the motor 7 is executed,
The motor 7 is started to rotate the rotary drum 1 to the left or right at a predetermined speed. That is, in step Sll of FIG.
When started, its rotational speed is detected by the rotational speed detector 10 and sent to the CPU through the input interface 124.
121 (step 512). At this time, the signal taken into the CPU 121 from the rotation speed detection 910 is "If the rotation speed of the motor 7 is smaller than the set rotation speed,"
If it is large, it becomes °゛H''. Therefore, C.P.
In U121, the captured signal is either u HN or “L 1
1, it is determined whether the motor rotation speed is greater than the set rotation speed (step 813). Here, when it is determined that the rotation speed of the motor 7 is larger than the set rotation speed, the process proceeds to step 314, and when it is determined that the rotation speed of the motor 7 is smaller than the set rotation speed, step Sl? Proceed to. In step 314, by reading the output state of the zero volt detector 11 through the input interface 124, it is determined fσ whether the phase of the AC voltage waveform is zero, that is, zero voltage. Here, when it is determined that the voltage is not zero, the process proceeds to step S2 in FIG. 6, and when it is determined that the voltage is zero, the process proceeds to step S15. In step S15, the CPU 121 calculates based on the zeropol) signal shown in FIG. 8(b) so that the call command time 111jt is delayed, that is, the call phase angle is large.
The process moves to the next step S16. In step S16,
By applying a roll call command signal based on the calculation result of the CPU 121 to the transistor 82 of the motor drive circuit 8 through the output interface 125, the phototriac coupler 81 is operated, and the resulting roll call pulse is generated at the timing shown in FIG. 8 ((+)). As a result, the voltage of the hatched portion of the voltage waveform shown in FIG. 8(a) is supplied to the motor 7, which reduces the rotational speed of the motor 7 and The rotation speed is adjusted to the same speed as the rotating drum 1. This is to accurately stop the rotating drum 1 at a predetermined door opening/closing position.When the process of step 316 is completed, the flowchart 1 of FIG.
Return to step S2 shown in . On the other hand, when it is determined in step 813 of FIG. 7 that the rotation speed is below the set rotation speed, the process moves to step 317, where the output state of the zero volt detector 11 is imported into the CPU 121,
It is determined whether the phase of the AC voltage waveform is zero, that is, zero port voltage. Here, when it is determined that the voltage is not zero volts, the process returns to step S2 in FIG. 6. Further, when it is determined that the voltage is zero, step 81
8, the CPU 121 calculates so that the call command time t becomes earlier, that is, the call phase angle becomes smaller, based on the zero volt signal shown in FIG. 9(b). Then, in the next step 319, by applying a call command signal based on the calculation result in the CPU 121 to the motor drive circuit 8 through the output interface 125, the phototriac coupler 814! The triac 83 is activated and the roll call pulse generated from this is called at the timing shown in FIG. 9(c). As a result, the voltage of the hatched portion of the voltage waveform shown in FIG. 9(a) is supplied to the motor 7, thereby controlling the rotational speed of the motor 7 to increase to the set rotational speed. In step S2 of FIG. 6, the output state of the drum position detector 9 is sent to the CPU 1 through the input interface 124.
21, it is determined whether the rotating drum 1 is in the door opening/closing position. Here, when it is determined as "rNO", the process returns to step S1, and steps S1 and S2 are executed until the rotary drum 1 reaches the door opening/closing position at the set speed. When it is determined that the rotating drum 1 has reached the door opening/closing position, the process proceeds to step S3, and wAl! II motor 7
At the same time, in step S4, an operation command is output to the brake body 1h@1815 and the brake drive circuit 15 is activated to close the brake 13 and lock the rotary drum 1 in the door open/close position. At this time, the opening 2 of the rotating drum 1 should be placed opposite the opening 6 of the casing 4. Therefore, in this embodiment as described above, the motor 7 is rotated at a low speed by phase control, and when the rotary drum 1 reaches the door opening/closing position, the rotation 1: ram 1 is stopped at that position, and Since it is locked by the brake 13, it is possible to automatically align the rotary drum 1 with the door opening/closing position, making it easy to open and close the drum 5'iI3, and to easily put in and take out laundry and drying items. This improves workability, eliminates the risk of burns, and improves safety.

【Effect of the invention】

As described above, according to the present invention, when loading and unloading laundry or dry items, the drum drive motor is rotated at low speed by phase control, and when the rotating drum reaches a predetermined door opening/closing position, the motor is automatically stopped. Moreover, since the rotary drum is locked by a brake, the rotary drum can be automatically aligned to the door opening/closing position, thereby freeing the operator from adjusting the position of the drum opening. The opening/closing and operation of the drum door and the loading and unloading of laundry and drying items become easier, and the workability and safety of loading and unloading can be improved.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a rotating drum drive device according to the present invention, FIG. 2 is a circuit diagram of a motor drive circuit in this embodiment, and FIG. 3 is a schematic diagram of a motor rotation speed detector in this embodiment. Figure 4 is a circuit diagram of the zero pol detector in this embodiment, Figure 5 is a configuration diagram of the control device in this embodiment, and Figures 6 and 7 are the door σa closing position alignment of the rotating drum in this embodiment. Flowchart 1, which shows the operating procedure, FIGS. 8 and 9 are waveform diagrams showing the phase control state of the drum drive motor in this embodiment, and FIG. 10 is a schematic diagram of a conventional drum-type washer/dryer. FIG. 1. Rotating drum, 2. Opening, 3. Drum door, 4
- Casing, 5 - opening, 7... Motor, 8 Motor drive circuit, 9 - Rotating drum position detection, 10 - Motor rotation speed detector, 11 Zero volt detector, 13 - Control device, 13 - Drum brake. Note that the same reference numerals in the figures indicate the same or equivalent parts. Figure 1

Claims (1)

[Claims] A rotating drum rotated by a drive motor within a casing, a drum position detection means for detecting a predetermined circumferential position of the rotating drum, a drum brake for locking the rotating drum in a door opening/closing position, and a drum brake for locking the rotating drum in a door opening/closing position; motor rotation speed detection means for detecting rotation speed; zero volt detection means for detecting zero volts of alternating current power supplied to the drive motor; motor drive means for controlling energization of alternating current power to the drive motor; In response to the output signal from the rotational speed detection means, the conduction angle of the AC power supplied from the motor drive means to the drive motor is controlled based on the zero volt signal from the zero volt detection means to drive the drive motor at a constant low speed. control means for controlling the rotation speed and, upon receiving an output signal from the drum position detection means, for stopping the drive motor and locking the brake drum to align the opening of the rotary drum with the door opening/closing position. A rotating drum drive device characterized by: