JPS63288198A - Control apparatus of clothing 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 the Invention The present invention relates to a control device for a clothes dryer that can switch between drying control using a sensor and drying control based on operating time settings.

BACKGROUND OF THE INVENTION Conventionally, this type of clothes dryer has an operation switch as shown in Fig. 7, and a timer is activated when the temperature difference between the intake and exhaust air of hot air into the drying chamber reaches a predetermined value. There is a sensor course in which the drying operation is completed when the timer's predetermined time period expires, and a fixed time course in which the timer is activated from the start of drying and the drying operation is performed for the timer's predetermined time period. The timer for the fixed-time course was shared.

Problems to be Solved by the Invention In such a conventional configuration, in the sensor course, the timer is operated after the difference between the intake air temperature and the exhaust temperature reaches a predetermined value, and the predetermined time limit of the timer becomes the final drying time. Therefore, a timer time limit of 1ri6 to 20 minutes is sufficient.
In addition, in the fixed time course, the timer is activated from the start of drying, so it usually takes about 90 minutes to dry the clothes, but if the timer used for the sensor course and the fixed time course are the same , K as shown in Figure 7
There was a problem in that the angular division of the scale plate 15 of the sensor course became small and the time limit setting of the timer knob 14 was difficult.

The present invention solves these problems by changing the angle division per unit time of the scale plate for the sensor course and the fixed time course, making it easier to set the time limit of the timer knob even in the sensor course. An object of the present invention is to provide a control device for a clothes dryer that can reduce variations in set time limits.

Means to Solve the Problem In order to solve this problem, the present invention provides a timer that sets a time limit by turning a timer knob, a timer motor that drives this timer, and a system that introduces hot air to store stored clothes. A drying chamber for drying, a control means for calculating a humidity temperature difference between an intake side and an exhaust side in this drying chamber and controlling energization of the timer motor, and a sensor for controlling a drying operation based on the temperature difference between the intake and exhaust sides. The control means is provided with a course selection switch for selecting a course or a fixed time course for controlling the drying operation according to the drying operation time set by the timer, and when the sensor course is selected by the selection switch, the control means When the temperature difference reaches a predetermined value, energization of the timer motor is started, and the energization of the timer motor is controlled so that the advance angle of the 9 timer knobs is accelerated per unit time, and a fixed time course is selected. In this case, the energization of the timer motor is controlled so as to slow down the advance angle of the timer knob per unit time.

Function: With this configuration, it is possible to change the advance angle per unit time of the timer during the sensor course and during the fixed time course with one timer, and even if the turning angle of the timer knob is the same, the timer during the sensor course can be changed. can be made shorter, and the time limit for fixed-time courses can be made longer.

Example Embodiments of the present invention will be described below with reference to the drawings.

The first diagram shows a control circuit for a clothes dryer according to an embodiment of the present invention, in which 1 is a commercial power source, 2 is a motor that rotates a drum into which clothes are placed, and a fan that sends hot air through a belt. 3 is a heater, 4 is a timer and has a contact S for controlling the motor 2, a contact S2 for controlling the heater 3, and a timer motor 6. 6 is an intake thermistor that detects the intake temperature of hot air into the drum. 7 is an exhaust thermistor that detects the exhaust side temperature of the hot air inside the drum. The resistance values of both thermistors 6 and 7 are converted into digital values by an A/D converter 8.9, and the digital values are input to the microcomputer 12.

A relay 1o controls the energization of the timer motor 6. 1
1 is the course selection switch, which selects the sensor course or fixed time course. Switch 1 for sensor course
1 is ON, and during a fixed time course, the switch is OFF. 12 is a microcomputer that performs sequence control according to a predetermined program, and controls the ROM, RA
Reference numeral 13 denotes a control board, which includes M, an arithmetic unit, an input unit, an output unit, and the like.

FIG. 2 shows the operating section, where 14 is a timer knob for setting the time limit of the timer 4, and 15 is a scale plate. A time scale for the sensor course and a time scale for the fixed time course are provided on the circumference of the scale plate 15. 11 is a selection knob of a course selection switch.

The operation of the clothes dryer of this embodiment configured as described above will be explained below. That is, as shown in FIG. 2, when the sensor course is selected by the selection knob 16 of the course selection switch 11 and the timer knob 14 is turned to the standard 10 minute position, the motor 2, heater 3, and control board 13 are energized. and the drying operation starts. Then, control is performed according to the control flow of the microcomputer 12 shown in FIG. That is, the course selection switch 11 is selected as the sensor course, the switch is turned on, and the input to the microcomputer becomes H level, which determines that the sensor course has been selected (steps 31 and 32).

Initially, the relay 10 is turned off and the timer motor 5 is stopped.

FIG. 4 is a diagram showing the temperature difference between intake air temperature and exhaust temperature during drying operation, and FIG. 6 is a diagram showing the timer motor 6, contact point S1. It is an operation diagram of S2.

At the beginning of drying, the temperature difference between the intake air and the exhaust air is small, but as time passes, the drying of the clothes progresses, the exhaust temperature rises rapidly, and the change in temperature difference exceeds Tdog in, for example, 2 minutes. , the relay 1o is turned on at point A to energize the timer motor 6 (steps 33, 34, 35, 36) L, and the timer 4 is started to measure time. When 10 minutes have elapsed since the timer 4 started operating, the heater contact S2 is turned OFF and the air blowing process begins. If the motor contact S is turned OFF during the air blowing process, the power to the motor 2 and the control board 13 is cut off. Ru.

Next, use the course selection switch 11 to select the fixed time course, and turn the timer knob 14 to 40, for example.
When set to minutes, the course selection switch 11 is OFF.
The input to the microcomputer 12 becomes L level, and it is determined that it is a fixed time course (step 32). In the case of a fixed time course, turn on relay 1o and turn on timer motor 6.
energizes and performs a timing operation (step 37). but,
In this case, if the relay 10 is turned on continuously, the timer knob 14 will change to 40 as shown on the scale plate 16 in FIG.
However, as described in the sensor course above, the air blowing process starts after 10 minutes (the time limit in the sensor course), so for example, if the timer motor 6 is energized for 1 minute, By repeatedly controlling the energization by stopping the energization for 3 minutes, the timer advances only 1 minute out of the 4-minute time limit, so it is possible to obtain a time limit that is 4 times the scale time limit of the sensor course (step 38). .

When set to 40 minutes in this way, the timer motor 6 is energized for 10 minutes out of the 40 minutes, and the air blowing process begins 40 minutes after the start of operation.

As described above, according to this embodiment, even if the turning angle of the timer knob is the same in the sensor course and the fixed time course,
The time limits can be different.

As a second embodiment, as shown in FIG. 6, the right half of the timer 4 is set to the sensor course and the left half is set to the fixed time course, a course selection switch is provided on the timer, and the timer knob 16 is set to the sensor course. When the course selection switch 11 is ON, when the fixed time course is set, it is OFF.
Even if configured to be an FF, the same control as in the embodiment described above is possible.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the timer can be used for both the sensor course and the fixed time course, and the advance angle of the timer knob relative to the unit time of the timer can be changed depending on the course. Even in the case of a sensor course with a small number of sensors, the angle of the timer knob per unit time can be increased, making it easier to set the knob, making detailed time limit settings, and reducing variation in set time limits, improving operability. A very convenient clothes dryer control device can be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing a control device for a clothes dryer according to an embodiment of the present invention, FIG. 2 is a front view of the operating section, FIG. 3 is a flowchart showing control of the microcomputer, and FIG. 4 Figure 6 shows the temperature difference between intake air temperature and exhaust air temperature.
The figure shows the operation diagram of the timer. FIG. 6 is a front view of the operation section of a clothes dryer in another embodiment, and FIG. 7 is a front view of the operation section of a clothes dryer in a conventional example. 4...Timer, 6...Intake thermistor, 7...Exhaust thermistor, 10...
...Relay, 11...Course selection switch, 1
4...Timer knob, 15...Scale plate. Name of agent: Patent attorney Toshio Nakao and one other person φ
-kuφta e-9';

Claims (1)

[Claims] A timer that sets a time limit by turning a timer knob, a timer motor that drives this timer, a drying room that introduces hot air to dry stored clothes, and a temperature difference between the intake and exhaust sides of this drying room. A control means that performs calculations and controls energization of the timer motor, and a sensor course that controls the drying operation based on the temperature difference between the intake and exhaust air, or a fixed time course that controls the drying operation according to the drying operation time set by the timer. a course selection switch for selecting the sensor course; the control means starts energizing the timer motor when the temperature difference between intake and exhaust reaches a predetermined value when the sensor course is selected by the selection switch; The timer motor is energized to speed up the advance angle of the timer knob per unit time, and when the fixed time course is selected, the timer motor is energized so as to slow down the advance angle of the timer knob per unit time. Clothes dryer control device.