JPS60111696A - 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 The present invention relates to an improvement in a type of dryer that dries clothes with hot air in a rotating drum.

An object of the invention is to provide a dryer that can dry clothes accurately and evenly to a desired degree of dryness.

The progress of drying clothes is affected by the amount and material of the clothes, the temperature and humidity of the outside air, etc., so it is difficult to achieve the desired drying results with a timer that stops the dryer.

However, in the method of measuring the electrical resistance of clothes during drying and stopping the operation when the measured value reaches a set value, when the electrical resistance detector is not in contact with the clothes, it shows the resistance of the air. , does not indicate the resistance value of the fabric. Therefore, the so-called average value method is used, in which several measured values are obtained within a certain period of time, such as when clothing comes into contact with the detector several times, and the average value is compared with a set value, and when the value is reached, the operation is stopped. However, since the maximum value of the measured values is the air resistance value, the average value may be larger at the beginning of driving or when there is a small amount of clothing.
The operation is stopped before the desired degree of dryness is achieved. On the other hand, when the lowest value among the resistance values obtained through several measurements exceeds the set value, the operation is completely stopped. In the so-called minimum value method, a certain number of classes are generated too many times, resulting in a large waste of time and power consumption.

This invention eliminates the noise caused by over-drying or under-drying or uneven drying as described above by using the configuration of the detection device described below.

The present invention provides a device that sets upper and lower limits of electrical resistance value indicating a desired degree of dryness and keeps a detector in an operating state at regular time intervals; The method is characterized by being provided with an arithmetic element that calculates all the average value of the resistance value and the dispersion value of the distribution of the resistance value, and a judgment circuit that compares all the arithmetic results of the element with a predetermined average value and dispersion value, If the average of the measured resistance values exceeds the set upper limit by the output signal of the judgment circuit, a notification means such as a buzzer is activated, and if the average value is between the set upper and lower limits, However, a control circuit is provided to stop the dryer when the variation value falls below a set value.

1, 2 and 3 show the structure of a clothes dryer to which the present invention is applied.

In FIG. 1, ▪ is an outer frame, 2 is a rotating drum in which the clothes to be dried are stored, 3 is a lifter that stirs the clothes in the drum, and 4 is a bearing that supports the entire front part of the drum. The bearing 4 is formed on the outer periphery of a drum cover 5 fixed to the front part of the outer frame 1, and the front plate 2a of the drum 2 is attached to the outer periphery of the drum cover 5.
The inner circumferential surfaces of the two are engaged so as to slide and rotate. The rear bearing 23 of the drum 2 supports a drum shirt 21e fixed to the drum rear plate 2b. The bearing 23 is fixed to a support member 24, which is located inside the rear surface of the outer frame 1. A door boat 6 is attached to the outer frame 1 on the inner peripheral side of the drum cover 5, and serves as an opening for loading clothes into the drum 2. A door 7 covering the input port is attached to the front of the outer frame 1 so as to be openable and closable. This is a door gasket that is attached to the 6ar/i door 7 and comes into contact with the door port 6. A semiconductor heater 8 serving as a heat source is installed between the drum cover 5 and the outer frame 1.
A warm air blowing port 9 into the drum 2 is provided in a portion of the drum cover 5 facing the heater 8.

On the other hand, as shown in FIGS. 2 and 3, a motor 1o is disposed at a part of the corner inside the outer frame 1, and a drum driving pulley 12 is wedged on the shaft 11 of the motor 10. A belt 14 is placed between the belt 12 and the drum 2. Reference numeral 13 is a tensioner for the belt 14.

At the other end of the motor shaft 11 are a fan 15 and a pulley 1 that guide cooling air for dehumidifying the circulating air to a heat exchanger to be described later.
7 is wedged, and the pulley 17 drives a fan 16, which circulates the air inside the drum, by means of a belt 22. The casing 25 of the fan 16 is attached to the drum support member 24 F!
casing 9 ζ
The front side of the drum 6 is connected to the drum cover 5 equipped with a hot air inlet 9 through a connecting duct 28, and a circulating air path is formed between the inside of the drum 2 and the heat exchanger 26.

A filter 18 is removably attached to a mounting shaft 2o on the rear plate 2b of the drum 2 in order to collect lint from the clothes being stirred in the drum.

19 is a filter guard that protects the filter 18. 29 is a back cover that covers the back surface of the outer frame 1.

Next, regarding an embodiment of the present invention, the configuration and operation of the detection/judgment section, which is the main part of the invention, will be explained using the block diagram of FIG. 4 and the operation flow diagram of FIG. 5.

In FIG. 4, 31 is an electrical resistance detector, and 41 is a drying selection section. The drying selection section is a manual operation section that divides the degree of dryness into <11) thorough drying, (b) normal drying, and (C) drying with residual moisture, and selects and switches all desired dryness degrees. Reference numeral 42 is a setting section, in which the resistance value MAXo and the detected resistance value dispersion value δok are set to values that provide the desired degree of dryness. It is a device that does The variation values are set to approximately 1% for a, 5% for b, and 5% for C depending on the degree of dryness. 44 is a detection signal generating section. This generates a detection signal every time the clothing comes into contact with the detector at the time interval determined by the detection time interval setting section 44. The calculation unit 45 calculates the average value of the large number of resistance values detected between the maximum value and the minimum value, and the fluctuation value δ of the distribution of the large number of resistance values, and stores them in the memory 46.

However, the number of contacts mentioned above is counted by the counting section 47, and when the set number of times is reached, the calculation result is compared with the set value δ0 of the dispersion set in the setting section 42 in the comparison/judgment section 48, and δ>δ0 If so, the operation is continued, and if δ is less than δ0, an output is generated from the comparison/judgment section 48 to shut off the heater 8 via the load ttllu section 52, and only the blowing operation continues.
The ventilation operation time is measured by a time measuring section 49, and a setting section 51
When the motor 10 has been operated for the time set in , the comparison/judgment section 50 outputs an output, valves the load control section 52, and stops the motor 10. Usually, in order to reduce the error in calculating a, δ is calculated by δ. The motor is stopped after the value appears several times.

In addition, the degree of dryness varies depending on each garment, but the resistance value MA
When X becomes more than M A X o, the comparison judgment unit 48
is output, the load control unit 52 is buzzed, and the buzzer 32 is configured to sound for a certain period of time. However, in order to reduce the error, M AX
> The number of times M A

If the vehicle is stopped in the middle of driving and the door is opened, the system is configured so that the vehicle resumes driving from step 3 in the flow shown in FIG.

As shown in Figure 7, synthetic fibers dry easily while cotton does not, so when drying a mixture of synthetic and cotton clothing, if the detector comes into contact with the synthetic clothing many times, the cotton clothing Dryer stops before drying. Furthermore, if the detector comes into contact with cotton clothing many times, even if the synthetic clothing dries, the operation will not stop and it will become too dry.

However, according to the embodiment of the present invention, as shown in FIG. 6, when MAX ≧ MAXo, a buzzer sounds. All you have to do is restart the drying operation.
Overall, it shortens the drying time, prevents overdrying, and saves power. In addition, when drying clothes made of the same material or a small amount of clothes, the operation is automatically stopped when the drying variation value δ becomes smaller than the set value δ0, resulting in a good dry finish with less uneven drying. It can be done.

According to the present invention, it is possible to accurately dry clothes to a desired degree of dryness without wasting power, without being affected by the amount and material of the clothes, the temperature and humidity of the outside air, and without wasting power.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a clothes dryer in which the present invention is implemented;
The figure also shows a vertical cross-sectional view of the drive motor section, FIG. 3 is a rear view of the dryer with the back cover removed, and FIG. 4 shows the coupling relationship between the clothing electrical resistance detection section and the operation control section according to the present invention. Block diagram % Figure 5 is an operation flow diagram of the clothes dryer of the present invention.
FIG. 6 is a diagram showing changes in the resistance value appearing on the electrical resistance detector of clothing during the drying process, and FIG. 7 is a diagram showing differences in drying progress depending on the material of clothing ρ. DESCRIPTION OF SYMBOLS 1... Outer frame, 2... Drum, 3... Stirring lifter, 4... Front bearing, 5... Drum cover, 6...
Door boat, 6a...door seal, 7...door,
8...Heater% 9...Hot air inlet, 10...Motor, 11...Shaft, 12...Goo! j, 13
...Tensimi/Boo 1ha 14...Belt, 15.
...Fan, 16...Fan, 17...Pulley%
18...filter, 19...filter guard,
20... Filter mounting shaft, 21... Drum shaft, 22... Fan belt, 23... Rear bearing, 2
4...Drum support member, 25...Fan casing. 26... Heat exchanger, 27.28... Connection duct, 2
9... Back cover, 30... Electronic control circuit, 31... Electric resistance detector, 32... Buzzer, 41... Drying selection section, 42... Dryness setting section, 43... - Detection signal generation section, 44... Detection time interval setting section, 45... Calculation section, 46... Storage section, 47... Counting section, 48... Comparison/judgment section, 49... Progress Time measurement section, 50... Comparison/judgment section % 51... Operating time setting section % 52... Load control section. 1st Figure 2 t(y 2nd I21th 6 z Repetition ■ 1 interval -

Claims (1)

[Claims] 1. In a dryer that floats and rotates clothes in a rotating drum through which hot air flows, a detector is placed inside the drum to detect the electrical resistance of the clothes when it comes into contact with the floating clothes. Regarding the dryness determination device for clothes fixed to the machine frame, there is a device that sets the upper and lower limits of the resistance value that indicates the desired degree of dryness, keeps the detector in the operating state at fixed time intervals, and detects a predetermined number of times. The present invention is characterized by being provided with an arithmetic element that calculates the average value and distribution variation of the resistance values below the upper limit obtained by the method, and a judgment circuit that compares the aforesaid arithmetic results with the set average value and dispersion value. , the output signal of the determination circuit activates the notification means when the average resistance value exceeds the set upper limit, and the average resistance value is between the set upper limit and lower limit; A clothes dryer further includes a control mechanism that stops the drying operation when the variation value is less than or equal to a set value.