JPH0326079B2 - - Google Patents

Description

Detailed Description of the Invention Field of Industrial Application The present invention automatically selects whether to proceed to the next drying process or to stop, depending on the degree of rise in temperature of exhaust gas discharged from the drying chamber of a clothes dryer. The present invention relates to a control device for a clothes dryer.

Conventional Structure and Problems Conventional clothes dryers are equipped with electrodes that detect the degree of dryness of clothes and a thermistor that detects the temperature of exhaust gas discharged from the drying chamber of the clothes dryer, such as a rotating drum. The drying process after detecting a predetermined degree of dryness with the electrodes has relied on a delay time setting device that determines the time it takes for the exhaust gas temperature to rise by a predetermined value.

In a clothes dryer equipped with such a conventional delay time setting device, depending on the atmospheric temperature of the clothes dryer, the amount and type of clothes, and the size of the heater capacity,
If the exhaust gas temperature does not rise to a predetermined temperature, or if the thermistor or the like becomes disconnected and the exhaust temperature cannot be detected, the drying process continues indefinitely, resulting in wasteful consumption.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and detects when the exhaust temperature does not rise to a predetermined value due to the relationship between the ambient temperature, the amount and type of clothing, and the size of the heater capacity, or when the exhaust temperature is detected due to a failure of the temperature detection element. To provide a control device for a clothes dryer that makes it possible to prevent energy from being consumed more than necessary when it is not possible.

Structure of the Invention The control device for a clothes dryer according to the present invention includes a dryness degree detection means for detecting the degree of dryness of clothes, and a predetermined degree of dryness based on the output of the dryness degree detection means and the dryness degree data stored in the storage means. a dryness level determining means for determining whether the clothes have been stored, an exhaust temperature detecting means for detecting the temperature of the exhaust gas discharged from the drying chamber containing the clothes, and exhaust temperature data stored in the output of the exhaust temperature detecting means and the storage means. and an output of the dryness degree determination means and an output of the exhaust temperature determination means, and an output indicating that the dryness degree determination means is at a predetermined degree of dryness. If the exhaust temperature determining means does not output an output indicating that the exhaust gas temperature has increased by a predetermined value within a certain period of time after the above-mentioned operation, the power supply to the heater is stopped, and the power is applied to the motor via the motor drive means. The exhaust temperature determining means outputs an output indicating that the exhaust temperature has been increased by a predetermined value within a certain time after the dryness level determining means outputs an output indicating that the dryness level is a predetermined degree. The apparatus is equipped with a control means for controlling the drying process to proceed to the next drying process when the drying process is performed.

Description of examples Examples of the present invention will be described below.

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention. Reference numeral 1 is a dryness degree detection means that detects the electrical resistance of clothing. Reference numeral 2 denotes dryness degree determining means, into which the output of the dryness degree detection means 1 and the output of the storage means 3 are input. Here, the storage means 3 stores data related to determination of degree of dryness, data related to exhaust temperature, data for driving the heater and motor for a predetermined period of time, and the like. The dryness degree determining means 2 generates an output when the degree of dryness of the clothes reaches a predetermined value.

Reference numeral 4 denotes exhaust temperature detection means, which is provided within the exhaust guide. 5, which determines the relative temperature based on the output of the exhaust temperature detection means 4 and the data of the storage means 3. The outputs of the dryness degree determining means 2 and the exhaust temperature determining means 5 are both input to the control means 6. The control means 6 controls the heater drive means 7 to control the supply of electricity to the heater.
It also controls the motor driving means 8 to control energization of the motor. Also, when an abnormality occurs,
The abnormality notification drive means 9 is controlled to make a buzzer sound.

When the control means 6 energizes the motor and heater to carry out hot air drying and the output of the dryness degree determination means 2 is generated, the exhaust temperature determination means 5 detects the exhaust temperature, and the counter in the storage means 3 is operated for a predetermined period of time. If the exhaust temperature rises by a predetermined value within this predetermined time, the process proceeds to the next drying step, and if the exhaust gas temperature does not rise by a predetermined value within the predetermined time, the heater is The configuration is such that the power supply is stopped, the power supply to the motor is stopped via the motor drive means 8, and the buzzer is sounded via the abnormality notification drive means 9.

FIG. 2 is a circuit diagram showing a specific configuration of this embodiment. 10 is a main body, and a rotatable drum 11 is provided at the center of the main body. The degree of dryness detection means 1 is constituted by an electrode 1a, and is provided at a position facing the inner surface of the drum so that clothing can easily come into contact with it.

The exhaust temperature detection means 4 is a thermistor 4a,
An exhaust guide 12 is provided for exhausting humid air within the drum 10 to the outside of the main body 10. A heater 13 is provided on the front side of the main body 10 and is energized by the heater drive means 7. Also, main body 1
A motor 14 energized by a motor drive means 8 is provided at the inner bottom of the motor 0 . A buzzer 15 that is sounded by the abnormality notification drive means 9 is provided on the front surface of the main body 9. Reference numeral 16 denotes a microcomputer, which determines the degree of dryness and exhaust temperature according to a built-in program, and generates signals for driving the heater 13, motor 14, and buzzer 15, respectively. Specifically, a storage unit 16 that stores dryness degree data, exhaust temperature data, etc.
a, an input section 16b for inputting the output of the electrode 1a and the output of the thermistor 4a, the heater drive means 7, the motor drive means 8, and the abnormality notification drive means 9.
It has an output section 16c that outputs a control signal to the memory section 16c, and an arithmetic control section 16d that controls the storage section 16a, input section 16b, and output section 16c, respectively, and performs data comparison operations and the like.

Next, the operation of this embodiment will be explained. FIG. 3 shows the main part of a flowchart controlled by the microcomputer 16.

Generally, after putting the material to be dried into the drum 11, the user operates a switch (not shown) to start drying. With this operation, microcomputer 1
6, in step 21, the heater 13 is energized via the heater drive means 7, and the motor 14 is energized via the motor drive means 8 to start hot air drying operation. When it is determined in step 22 that the predetermined degree of dryness has been reached based on the output of the electrode 1a of the dryness degree detecting means 1, the storage section 16a stores information indicating that the degree of dryness is the predetermined degree.
At the same time, the relative value of the exhaust gas temperature is memorized by the output of the thermistor 4a of the exhaust gas temperature detection means 4.

Next, the microcomputer 16 performs step 2.
At steps 3 and 24, it is confirmed whether the exhaust gas temperature rises by 5 degrees within a certain period of time, and if the exhaust temperature does not rise by 5 degrees even after a certain period of time passes, at step 25, the heater 13 is energized via the heater drive means 7. , the motor 14 is de-energized via the motor drive means 8 , and the buzzer 15 is made to sound via the abnormality notification drive means 9 .

On the other hand, if the exhaust temperature rises by 5 degrees within a certain period of time, the time from when the degree of dryness is detected until the exhaust temperature rises by 5 degrees is checked in step 26, and in step 27 hot air drying is performed for the delay time determined based on this time. If you continue driving and confirm that the delay time has ended in step 28, proceed to step 29.
At step 30, the power supply to the heater is stopped via the heater driving means 7, and at step 30, cold air drying is started.
If it is confirmed in step 31 that the cold air drying has been completed, then in step 32, the power supply to the motor 14 is stopped via the motor drive means 8, and the drying operation is ended.

According to the above embodiment, if the exhaust temperature does not rise to a predetermined value within a certain period of time due to a malfunction such as disconnection or short circuit of the thermistor 4a, the ambient temperature of the clothes dryer, the amount and type of clothes, and the size of the heater capacity, It stops the drying process, which prevents unnecessary use of energy and also prevents wrinkles.

Effects of the Invention As is clear from the above description, the present invention has a means for detecting and determining a predetermined degree of dryness, a means for detecting and discriminating exhaust temperature, and an output of each of the above-mentioned discriminating means is inputted, and a predetermined degree of dryness is detected. After the determination, if the exhaust gas temperature does not rise to a predetermined value within a predetermined period of time, the controller is provided with a control means that automatically stops energizing the heater and motor after the elapse of the predetermined period of time, and when the exhaust temperature detection means fails Even if the delay time setting is poor due to the atmosphere, the type of clothing, the amount of clothing, the heater capacity, etc., unnecessary energy usage and wrinkles on the clothing can be prevented, and a good drying effect can always be achieved. Accordingly, it is possible to provide a control device for a clothes dryer that can be obtained.

[Brief explanation of drawings]

Fig. 1 is a block diagram of main parts of a control device for a clothes dryer showing an embodiment of the present invention, Fig. 2 is a diagram showing the relationship between the clothes dryer and the control device, and Fig. 3 is a diagram showing the operation of the control device. This is a flowchart illustrating the process. DESCRIPTION OF SYMBOLS 1... Dryness degree detection means, 2... Dryness degree discrimination means, 3... Memory means, 4... Exhaust temperature detection means, 5... Exhaust temperature discrimination means, 6... Control means,
7... Heater drive means, 8... Motor drive means,
9... Abnormality alarm drive means, 10... Dryer main body,
11...Drum, 12...Exhaust guide, 13...
Heater, 14...Motor, 15...Buzzer, 16
...Microcomputer.

Claims (1)

[Scope of Claims] 1. A degree of dryness detection means for detecting the degree of dryness of clothing, and a drying method for determining whether the degree of dryness is a predetermined degree based on the output of this degree of dryness detection means and the degree of dryness data stored in the storage means. a degree determination means, an exhaust temperature detection means for detecting the temperature of exhaust gas discharged from a drying chamber containing clothes, and a relative value of the exhaust temperature based on the output of the exhaust temperature detection means and the exhaust temperature data stored in the storage means. Exhaust temperature discriminating means for discriminating the value, the output of the dryness degree discriminating stage and the output of the exhaust temperature discriminating means are input, and after the dryness degree discriminating means outputs an output indicating that the dryness is a predetermined degree, the temperature is constant. If the exhaust temperature determining means does not output an output indicating that the exhaust gas temperature has increased by a predetermined value within the time, the power supply to the heater is stopped, and the power supply to the motor via the motor drive means is stopped. , when the exhaust temperature determining means outputs an output indicating that the exhaust gas temperature has been increased by a predetermined value within a certain time after the dryness degree determining means outputs an output indicating that the dryness is a predetermined degree; A control device for a clothes dryer including a control means for controlling the process to proceed to the next drying process. 2. The control device for a clothes dryer according to claim 1, wherein the control means issues an abnormality notification via an abnormality notification drive means when stopping energization to the heater.