JPS5934299A - 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 dryer that detects whether or not clothes are dry and automatically ends the drying operation.

Conventional Structure and Problems Conventionally, when drying clothes using a dryer, it has been common to set a timer to an appropriate time and operate the dryer. In this case, if the installation time is incorrect, the drying may not be sufficient or the clothes may be damaged due to excessive drying.

Although various dryness detection devices have been proposed and implemented to solve this inconvenience, each of these devices still has major problems. For example, there is a method of detecting the drying state based on the temperature difference between the outside air temperature and the exhaust temperature of the dryer, but in this method, when the clothes to be dried are only a little dry, the heated outside air is directly exhausted, and the clothes are completely dried again. There is a problem in that even though the dryer is not dry, the temperature difference between the outside air and the exhaust air reaches a predetermined value of 1 or less and the dryer stops.

There is also a method of detecting dryness of clothes by providing a pair of electrodes in the storage and detecting the average resistance value of the clothes that come into contact with the electrodes, but this method also has some problems. First, there is a safety issue due to Kamesu being exposed inside the storage facility. Second, as the clothing dries, it becomes very high in resistance, reaching 10 MQ or more, so when measuring resistance, the influence of leakage current in the circuit itself increases.

Purpose of the Invention The present invention aims to solve the above-mentioned disadvantages and problems.
This system uses an induction noise detection method that is completely different from the dryness detection method that uses exhaust temperature and resistance value detection to accurately detect neck dryness and automatically stop the dryer operation. It is.

Structure of the Invention In order to achieve the above object, the present invention provides a storage for storing clothes, a drying means for drying the clothes, a drying operation control section for controlling the operation of the drying means, It is fixed in the storage compartment and comes into direct contact with the clothes.If it comes into contact with the clothes when it is damp, it will detect the induced noise from a large power source, and if it comes into contact with the clothes when it is dry, it will detect the induced noise from a small power source. An inductive noise detection sensor that detects inductive noise is connected to this inductive noise detection sensor,
and an inductive noise detecting section that outputs an output signal when the average value of the inductive noise from the power source detected by the inductive noise detecting sensor becomes equal to or less than a predetermined level as the clothing dries; Further, the structure is configured such that the operation of the drying means is stopped by receiving the output signal of a part of the timer so that the output signal is output after a predetermined time after receiving the output signal of the induced noise detection section. The dryness of the clothes is detected based on the magnitude of the induced noise, which changes depending on the degree of wetness of the clothes.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows the basic configuration of the present invention, in which 1 is a storage for storing clothes, 2 is for drying clothes in the storage 1. The drying means 3 is a drying operation control section that controls the operation of the drying means 2. Reference numeral 4 indicates an induced noise detection sensor provided in the storage 1, and 5 indicates an induced noise detection section.

Generally, high-impedance circuit elements are susceptible to inductive noise from the power supply, but the present invention takes advantage of this phenomenon to reduce the amount of clothing in the storage compartment to 1kI! When the dog is dry, this induced noise is detected more easily by the dog, and when the dog is dry, it is detected less. That is, dryness of the clothes is detected based on the magnitude of the detected induced noise.

The induced noise from the power supply detected by the induced noise detection sensor 4 is input to the induced noise detection section 5, and the
When the level of the noise level falls below a predetermined level, the induced noise detection section 5 outputs an output signal.

The average thickness of this induced noise differs slightly depending on the clothes in the storage room 1, so there is a need for correction.

6 is a part of a timer, and the induced noise detection section 5 outputs an output signal when the magnitude of the induced noise decreases to a level that can be considered to indicate that the clothes are almost dry (drying rate is about 95%).
The timer section 6 shall output an output signal after a predetermined period of time (from when the drying rate is 95% to when the drying rate is about to reach complete dryness) has elapsed since the output signal of the induced noise detection section 5 was output. .

In this way, by detecting the point in time when the drying rate reaches about 95% and delaying the end of the drying process for a certain period of time from that point, it is possible to remove any kind of glue on clothes. (2) The above-mentioned correction can also be made to the amount of dryness, and the dryness detection can be made to work effectively. When the timers issue an output signal, the drying operation control section 3
moves to stop the operation of the drying means 2.

Figure 2 shows the strategic structure in one embodiment. 7
This is the exterior casing of the entire dryer made of conductor. Reference numeral 8 denotes a rotating drum for physically stirring the clothes to be dried, and constitutes a storage. 9 is a door for putting in and taking out clothes to be dried, 1o is a fixed wall, and these rotating drums 8. Door 9.
A storage 1 is constituted by a fixed wall 1o. Reference numeral 11 denotes a heater that heats outside air, and 12 a fan that causes dry outside air heated by the heater 1 to flow into the housing 1 and exhausts humid air inside the housing 1 to the outside of the machine.

13 is a motor for rotating the rotating drum 8 and the fan 12, and 14 and 15 are belts that transmit the rotational motion of the motor 3 to the rotating drum 8 and the fan 12, respectively. Further, 4 is the above-mentioned inductive noise detection sensor.

FIG. 3 shows the structure of the induced noise detection sensor 4.
Reference numeral 17 indicates an inner conductor plate connected to the induced noise detection section 5, and reference numeral 18 indicates a resin layer provided to electrically insulate the inner conductor plate 17. Reference numeral 19 denotes an outer conductor plate, and the outer conductor plate 19 is made to come into direct contact with clothing. These inner conductor plates 1 and resin layer 18. Inductive noise detection sensor 4 is configured by outer conductor plate 19 .

If the input impedance of the induced noise detector 5 is set high, the induced noise detector 5 can detect the induced noise from the power source using the upper white conductor plate 17 as a kind of antenna.

When damp clothing comes into contact with the outer conductor plate 19, the entire garment becomes a kind of antenna, and a very large induced noise is induced to the outer conductor plate 19, and the capacitive coupling through the resin layer 18 causes the inner A large amount of induced noise will also be induced in the conductor plate. As the clothes dry, the resistance value of the clothes increases, so even if the clothes come into contact with the outer conductor plate 19, the effect of the clothes as an antenna becomes weaker. Therefore, the induced noise from the power source induced in the inner conductor plate 17 is also reduced.

In this way, the present invention utilizes the fact that the effect of clothing as an antenna changes depending on the drying rate of the clothing.

Figure 4 shows a specific electrical circuit diagram, 20Il-J: power plug, 21: power switch, 22: power transformer,
The back side '3 is a power supply circuit that supplies power to the inductive noise detection section 5 and the timer section 6. Commercial AC power supply is power transformer 2
2, and is rectified and smoothed by the power supply circuit 23 to generate a DC voltage having an IE potential at the positive output side terminal 24 of the power supply circuit 23 and a negative potential at the ground side terminal 25.

The inductive noise detection section 5 is connected to the inner conductor plate 1 of the inductive noise detection sensor 4, and is also connected to the exterior casing 7 in order to set the potential of the non-power side of the power transformer 22 to the potential of the exterior casing 7. is also connected.

When the clothes are dry and the average level of induced noise detected by the induced noise detection section 5 becomes smaller than a predetermined level, the timer section 6 outputs an output signal to the drying operation control section 3 through the process described above.

26 and 27 are switching elements that control the flow to the motor 13 and heater 11, respectively, and are conductive during drying operation. 28 & is a blowing time delay section,
These switching elements 26 and 27 and the air blowing time delay section 28 constitute the drying operation control section 3.

When the timer part 6 outputs an output signal, the switching element 2
7 becomes non-conductive, and at the same time, the ventilation time delay section 28 starts operating. At this point, power to the heater is stopped, but
In order to lower the temperature inside the storage 1, only the motor is energized for a certain period of time, and when the certain air blowing time has elapsed, the air blowing time delay section 28 outputs an output signal, and the switching element 26
becomes non-conductive, the power to the motor also stops, and the dryer completely stops operating.

Next, the operation of the induced noise detection section 5 will be explained.

FIG. 6 is an electrical circuit diagram of the induced noise detection section 5,
29 is the inductive noise detection sensor 4 (Il + conductor plate 17
3o is a terminal connected to the exterior housing 7, 31 is a terminal connected to the positive output side terminal 24 of the power supply circuit 23, and 32 is a terminal connected to the ground side terminal 25 of the power supply circuit 23. , 33 are output terminals of the induced noise detection section 5 connected to the timer section 6.

34 is a resistor, and the exterior casing 7 is connected to the ground side terminal 25 of the power supply circuit 23 through the resistor 34 through 1. There will be.

35 is an operational amplifier, the positive input terminal of which is connected to the inner conductor plate 1γ of the inductive noise detection circuit 4, and the negative input terminal and output terminal thereof are short-circuited.

35 is a Zener diode, 36 is a capacitor, 37
is a resistor, and the Zener diode 35, capacitor 36, and resistor 37 are connected in parallel between the positive input terminal of the operational amplifier 35 and the ground side of the power supply.

A resistor 38 is connected between the positive input terminal of the operational amplifier 35 and the main potential side of the power supply. In order to measure induced noise, it is necessary to use high resistances of several MQ as the resistors 37 and 38. Zener Gouio) '35 and capacitor 36
This is to protect the operational amplifier 35 by suppressing the influence of static electricity on clothing.

Inductive noise from a power supply having a commercial AC frequency is caused by superimposition of direct current Mt and current, which are fought by resistors 37 and 38.
C. The impedance is lowered by the operational amplifier 35 and appears at the output terminal of the operational amplifier 35.

39 is an operational amplifier, 4o is an electrolytic capacitor, 41 is a resistor, and 42 is a diode. The positive potential terminal of the electrolytic capacitor 4o is connected to the output terminal of the operational amplifier 36, and the negative potential terminal is connected to the input terminal r- of the operational amplifier 39. resistance 4
1 and the diode 42 are connected in parallel between the positive input terminal of the operational amplifier 39 and the ground side of the power supply. 42 and 43 are resistors, the resistor 42 is connected between the negative input terminal of the operational amplifier 39 and the ground side of the power supply, and the resistor 43 is connected between the negative input terminal and the output terminal of the operational amplifier 39. , these resistors 42 and 43 and the operational amplifier 39 constitute a common mode amplifier circuit.

The impedance is kept low, and since the induced noise is superimposed with the DC voltage determined by the resistors 37 and 38, only the AC component of the induced noise having the frequency of commercial AC is separated by the electrolytic capacitor 40 and the resistor 41. Be defeated by the circuit. The AC component of this induced noise is half-wave rectified by the diode 42 and input to the positive input terminal of the operational amplifier 39. Further, this half-wave rectified induced noise signal is amplified in phase and appears at the output terminal of the operational amplifier 39.

44 is a diode, 45 and 46 are resistors, and 47 is an electrolytic capacitor. Diode 44 and resistor 45 and 4
6 are connected in series and inserted between the output terminal of the operational amplifier 39 and the ground side of the power supply.

Electrolytic capacitor 47 is connected in parallel with resistor 46. The output signal of the operational amplifier 39 is connected to a diode 44 and a resistor 4.
5 and 46. The average voltage is temporally averaged by the charging/discharging circuit constituted by the electrolytic capacitor 47, and the average voltage is applied to both ends of the electrolytic capacitor 47. 48 is a comparator, 49. E50 and 51 are resistors. Resistors 49 and 5o are connected in series and inserted between the positive potential side of the power supply and the ground side. Non-inverting input terminal f of comparator 48
is connected to the intermediate connection point between the resistor 49 and the resistor 6o, the inverting input terminal is connected to the non-grounded side of the capacitor 47, and the output terminal is connected to the positive potential side of the power supply via the output terminal 33 of the inductive noise detection section 6 and the resistor 51. ing.

When the potential of the electrolytic capacitor 47 is higher than the voltage determined by the resistors 49 and 50, the voltage at the output terminal of the comparator 48 is almost zero, but when this potential relationship is reversed, the output terminal voltage of the comparator 48 approaches the power supply voltage. stand up In other words, when the clothes to be dried are damp and the induced noise detected by the induced noise detection sensor 4 is large, the potential of the output terminal of the comparator 48, that is, the output terminal 33 of the induced noise detection section 5, is almost zero; dries and the average value of this inductive noise decreases, and when the potential of the electrolytic capacitor 47 becomes lower than the potential of the non-inverting input terminal of the comparator 48 determined by the resistors 49 and 60, the output terminal of the inductive noise detector 5 33 voltage rises.

Thereafter, the timer part 6 starts operating, and the dryer stops operating after the above-described process.

Effects of the Invention According to the present invention as described in L, the clothes to be dried are used as a kind of antenna2) and the induced noise from the power source is detected, so that the antenna effect of the clothes can be This method takes advantage of the fact that the electrical resistance decreases with the degree of dryness.Furthermore, the present invention can detect dryness without contacting the clothes to be dried, and can detect extremely high resistance using conventional electrodes. Compared to the method of directly detecting the resistance value of clothing, it is very superior in terms of safety and measures against leakage current in the circuit itself.Also, compared to the conventional method of detecting the exhaust temperature, In comparison, the present invention is equivalent to detecting the resistance value of clothing in terms of wood quality, so it can be used effectively even if the number of clothes to be dried is very small.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the basic configuration of the present invention, Fig. 2 is a schematic structure of a dryer according to an 11th embodiment of the present invention, and Fig. 2 is a front view, and Fig. ) shows the cross-sectional view, Figure 3 shows the structure of the inductive noise detection sensor, and the figure 3 shows the front view.
FIG. 4B is an x-x' line analysis plane view of (5), FIG. 4 is an electric circuit diagram, and FIG. 6 is an electric circuit diagram of the inductive noise detection section. 1...Accommodation storage, 2...Drying means, 3.
... Drying operation control section, 4 ... Induction noise detection sensor, 6 ... Induction noise detection section, 6 ...
...Timer part, 17...Inner conductor plate, 1
8... Resin layer, 19... Evening side conductor plate, 23... Power supply circuit, 26°27...
Switching element, 28...Blow time delay section. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure (A) 3rd L Ne 1 (C) (B) 9

Claims (1)

[Scope of Claims] --- (1) A storage for storing clothes, a drying means for drying the clothes, a drying operation control section for controlling the operation of the drying means, and a storage for fixing the clothes in the storage. An induction device that can be directly contacted with the clothing and detects induced noise from a large power source when the clothing is wet, and detects induced noise from a small power source when it comes into contact with the clothing when it is dry. a noise detection sensor; and an induction wire connected to the induction noise detection sensor and outputting an output signal when the average value of the induced noise from the power source detected by the induction noise detection sensor becomes less than a predetermined level when the clothes are dried. a noise detector; and a timer portion that is connected to the induced noise detector and outputs an output signal after a predetermined period of time after receiving the output signal of the induced noise detector; A dryer configured to stop the operation of the drying means upon receiving a part of the output signal. (2) The inductive noise detection sensor includes an inner conductor plate connected to the inductive noise detection part, a resin layer provided around the inner conductor plate, and a surface of the resin layer that is electrically connected to the inner conductor plate. and an insulated outer conductor plate, and when the outer conductor plate comes into contact with the clothing, the magnitude of the induced noise from the power source changes according to the drying process of the clothes.
The dryer according to claim 1, which detects a change in C.