JPS6374000A - Method of operating clothes drier - Google Patents

Abstract

(57) [Abstract] 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 method of operating a clothes dryer for drying clothes.

Conventional technology In conventional clothes dryers, during drying operation, in order to adjust the temperature inside the rotating drum and detect the degree of dryness, a temperature detecting means is provided near the outlet of the rotating drum to convert the temperature into electrical resistance. It is converted into voltage and input to a microcomputer etc. for control.

Recently, there has been an attempt to improve the drying condition of clothes by intermittently operating cold air for a predetermined period of time even after the drying process has ended, but since hot air is not required, the information from the temperature detection means described above is not available at this stage. It was considered unnecessary.

Problems to be Solved by the Invention However, in the conventional method of operating a clothes dryer, control during cold air operation was not sufficient from a safety point of view. That is, considering that clothing is flammable and the clothes dryer is equipped with a heating element, there has been a problem in that safety in the event of an abnormality has not been sufficiently considered.

In view of the above problems, the present invention aims to provide sufficient safety even during cold air operation.

Means for Solving the Problems In order to achieve the above object, the method for operating a clothes dryer of the present invention is such that during the cold air operation after the end of the drying process, the temperature detection means for detecting the temperature inside the rotating drum detects a specific temperature. When a change in temperature is detected, it is determined to be a special condition and the notification means is activated.

By using the method described above, the temperature data detected by the temperature detection means installed near the outlet of the rotating/indicating drum shows that after the completion of the drying process, if the individual temperature is normal, it will decrease, but the temperature inside the drum will decrease. Other changes occur during abnormal times. That is, it is also possible to distinguish the abnormal state into several types based on the temperature data detected by the temperature detection means.

Embodiments Hereinafter, embodiments of the present invention will be described using FIGS. 1 to 5.

FIG. 1 is a block diagram of a control device for a clothes dryer according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a control device, which includes a main control section 2, a temperature voltage conversion section 3, and a main control section 2. start·
Stop switch section 41 Function selection switch section 59 Display section 6. Heater section power control switch 7, motor section power control switch 8. It is comprised of a door opening/closing information low voltage conversion section 9 and a control power supply section 10 for operating this control device.

This control device 1 includes a temperature sensor 11. The heater 12 and the motor 13 are respectively connected to the temperature voltage converter 3. It is connected to a heater section power control switch 7 and a motor section power control switch 8, and furthermore, a door opening/closing detection switch 14 is connected to an input section of a door opening/closing information low voltage conversion section 9.

The power switch 15 turns on the entire clothes dryer.
FF.

FIG. 2 shows an example of the temperature change near the drum outlet during the drying process, and shows the cold air at the final stage of the drying process and after the end.

FIG. 3 shows the temperature change when the cold air operation is continued for a certain period of time even after the drying process is completed. In this case, if it were normal, the change in FIG. 2 would be even larger.

FIG. 4 shows the temperature change in the vicinity of the drum outlet during abnormal conditions, and shows the case where a "thermistor" is used as the temperature sensor 11.

When the temperature inside the drum unexpectedly rises, when the air blowing operation is started, the rising air inside the drum passes through the drum outlet, and the temperature rise is detected through the temperature sensor 11. Depending on the temperature range at that time, it is determined whether or not there is an abnormality using a predetermined voltage.

Conventionally, abnormality was determined by whether the thermistor was disconnected or
However, in the present invention, a judgment level is set between a temperature considered to be sufficiently high compared to the temperature newly set for temperature control and a "disconnection", and it is determined that "abnormal high temperature" or "abnormal heat generation" etc. Distinguish special conditions by name, and provide functions such as continuous buzzer sound to notify the user as soon as possible.

This operation will be explained based on the flowchart in FIG.

When the drying process is finished, the heater section power control switch 7
, motor section power control switch 8 are both OFF.

From this state, we are in a position to detect anomalies. After waiting for a certain period of time, the motor metropolitan electric power jli control switch 8 is turned on to drive the motor 13.

In this state, the drum and fan rotate, blowing air into the drum. passed through the drum. The temperature of the lice is taken into the main control section 2 as a voltage corresponding to the temperature by the temperature voltage conversion section 3 of the control device 1 via the temperature sensor 11 installed near the drum outlet, and is compared with a preset voltage. - Calculation is performed.

First, if the level is normal, after waiting for a certain period of time, the motor section power control switch 8 is turned OFF to stop the motor 13 and the abnormality detection is repeated again.

If the level is abnormal, immediately turn on the motor TEPCO control switch 8.
is turned OFF to stop the motor 13.

Next, the abnormal level is ``disconnection'', ``high temperature'', or ``short circuit''.
The system compares and determines the difference between the two, and issues a corresponding abnormality notification and lamp display.

In this abnormal state, the user or a third party should turn on the power switch 1.
The notification/display will continue until it drops below 6.

If the process is normal, it may be possible to complete the process after a predetermined number of times or time.

Effects of the Invention As described above, according to the present invention, the cold air operation is performed after the drying process in which the conventional temperature sensing child is not used, and the high temperature state in the drum is distinguished from the disconnection or short circuit of the temperature sensing means. It is possible to notify and improve safety.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a control device for a clothes dryer according to an embodiment of the present invention, FIGS. 2 to 4 are diagrams showing time-series changes in temperature near the outlet of the rotating drum, and FIG. 5 is a diagram showing the same control device. 3 is a flowchart of the main parts of the device. 1... Control device, 11... Temperature sensor. Name of agent: Patent attorney Toshio Nakao and 1 other name 2
figure

Claims (1)

[Claims] If the temperature detection means that detects the temperature inside the rotating drum detects a specific temperature range or temperature change during cold air operation after the end of the drying process, the clothes dryer determines that there is a special condition and activates the notification means. Method.