JP2010188034A - Clothes drier - Google Patents

Abstract

The present invention provides a clothes dryer that can automatically finish operation even when a filter is clogged in the clothes dryer that automatically terminates operation.
Normally, an input to a heater 7 is input from information on the time change of the number of times that the resistance detection means 11 detects that the resistance value of the garment is smaller than a predetermined value per unit time from the dryness detection means 12. The remaining time to be performed is determined, and when the filter clogging detection means 14 recognizes that the filter is clogged, the remaining time for performing input to the heater 7 is set to be different from the normal setting. Driving can be completed with a moderate dryness.
[Selection] Figure 1

Description

  The present invention relates to a clothes dryer that supplies hot air into a rotating drum to dry clothes and automatically ends the operation.

  Conventionally, clothes dryers are configured to automatically end operation based on information detected by the dryness detection means (see, for example, Patent Document 1).

As shown in FIG. 7, a motor 2 serving as a driving source is provided at the lower part of the main body 1, and the motor 3 and the fan 3 and the rotating drum 4 provided on the back side of the main body 1 are rotated. Further, a heater 5 serving as a heat source is disposed on the front side of the main body 1, and hot air heated through the heater 5 by rotation of the fan 3 is introduced into the rotating drum 4 through the hot air outlet 6, and the rotating drum 4. The clothes housed inside are heated and dried. A filter 7 is mounted on the back wall of the rotating drum 4 so that lint coming out of the clothing is not released outside the machine. Arrow A indicates the flow of wind. Reference numeral 8 denotes an electrode which is in contact with clothes in the rotating drum 4 during operation. The electrode 8 is composed of two conductive members 9 and an insulating member 10 as shown in FIG. 8, and detects the dry state of the clothes by detecting the resistance value R between the conductive members 9. 9, the operation is terminated at a time t4 when a certain delay time T3 elapses from a time t2 when the resistance value R between the conductive members 9 is continuously greater than the set value a for a predetermined time T1. ing. The delay time T3 is set because drying is insufficient at the time t2.
JP-A-6-327899

  However, in such a conventional clothes dryer, the drying speed varies depending on factors such as the lint generated from the clothes adhering to the filter, and therefore it is difficult to set the delay time T3 according to the appropriate degree of drying. There was a problem of being.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a clothes dryer that can finish the operation with an appropriate degree of drying even if the filter is clogged.

  In order to achieve the above object, the clothes dryer of the present invention usually changes with time in the number of times the resistance detection means detects that the resistance value of the clothes is smaller than a predetermined value per unit time from the dryness detection means. The remaining time for input to the heat source is determined from the above information, and when the filter clogging detection means recognizes that the filter is clogged, the remaining time for input to the heat source is set differently than usual. It is the clothes dryer which comprised.

  Thereby, even if the drying speed changes due to factors such as lint generated from clothes adhering to the filter, the delay time can be set according to the drying speed.

  The clothes dryer of the present invention can realize a clothes dryer that can accurately detect drying even when the filter is clogged and can finish the operation with an appropriate degree of drying.

The present invention collects a heat source, a rotating drum for storing and drying clothes, a blower fan for supplying hot air heated by the heat source into the rotating drum, and a lint generated from the clothes disposed in the blowing path. A filter that detects the resistance of the clothes in the rotating drum, a dryness detection means that detects the dryness of the clothes from the information of the resistance detection means, and a temperature disposed in the vicinity of the heat source. Control for controlling input to the heat source by information of a sensor, filter clogging detection means for detecting the degree of clogging of the filter from information of the temperature sensor, and information on the dryness detection means and the filter clogging detection means And the control means normally has a resistance value of the garment smaller than a predetermined value by the resistance detection means per unit time from the dryness detection means. The remaining time for the input to the heat source is determined from the information of the time change of the number of times that it is detected, and when the filter clogging detection means recognizes that the filter is clogged, the input to the heat source is performed. By configuring so that the remaining time is set differently from the normal time, even if the filter is clogged, it is possible to accurately detect the drying and to finish the operation with an appropriate degree of drying.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
1 is a block diagram of a clothes dryer according to Embodiment 1 of the present invention, FIG. 2 is a longitudinal sectional view of the clothes dryer, FIG. 3 is a perspective view of electrodes of the clothes dryer, and FIG. 4 is a clothes dryer. FIG. 5 is a graph showing the output characteristics of the resistance detection means when the normal clothes are dried and the temperature sensor, and the time change of the heater input. FIG. 5 is a resistance detection means when drying clothes which are difficult to dry with the clothes dryer. FIG. 6 is an output characteristic diagram of the resistance detection means when the filter is clogged with the clothes dryer, and the temperature sensor and heater. It is a figure which shows the time change of an input. 1 to 3, the electrode 8 is composed of two conductive members 9 and an insulating member 10, and the resistance value between the conductive members 9 is detected by the resistance detection means 11. The dryness detection means 12 detects the dryness of the clothes from the information on the time change of the number of times that the resistance detection means 11 detects that the resistance value of the clothes has become larger than a predetermined value. The temperature sensor 13 is disposed in the vicinity of the heater 5, and the filter clogging detection means 14 detects the degree of clogging of the filter 7. The control unit 15 controls the heater 5 and the motor 2 based on information from the dryness detection unit 12 and the filter clogging detection unit 14.

  FIG. 4A shows the change over time in the number of times Y when the resistance detection means 11 detects that the resistance value of the clothes is smaller than a predetermined value per unit time when ordinary clothes are dried. is there. What was y1 at the beginning of operation gradually decreases with the progress of drying, and reaches zero at time t5. The dryness detection means 12 calculates the remaining operation time T6 from the value of y1 and t5 at time t5. When the amount of clothing is large, t5 becomes slow because it takes time to dry. On the other hand, when it is small, t5 becomes faster. Further, at the beginning of operation when the amount of moisture in the garment is large, y1 becomes large because the frequency with which the wet portion hits the electrode 8 is high. Conversely, when the amount of water is small, y1 is small. The dryness detection means 12 detects the state of the clothes from these y1 and t5, determines the operation time T6 after the time t5 so as to be in an appropriate dry state at the end of the operation, as shown in FIG. 4 (c). The heater 5 is energized by the control means 15 until time t7. FIG. 4B is a diagram showing the change over time of the temperature Th of the temperature sensor 13. When the filter 7 is not clogged, it is lower than the discriminant value Th1, so that the filter clogging detection means 14 uses the filter 7. Identifies it as not clogged.

FIG. 5A shows the change over time in the number of times Y when the resistance detection means 11 detects that the resistance value of the garment is smaller than a predetermined value per unit time when the clothes that are difficult to dry are dried. is there. The filter 7 is not clogged. What was y2 at the beginning of operation gradually decreases with the progress of drying, and becomes zero at time t8. The dryness detection means 12
The state of the clothes is detected from these y2 and t8, and the operation time T9 after time t8 is determined so that it becomes a proper dry state at the end of the operation, and the heater 5 is turned on by the control means 15 as shown in FIG. Energize until time t10. FIG. 5B is a diagram showing the change over time of the temperature Th of the temperature sensor 13. When the filter 7 is not clogged, it is lower than the discriminant value Th1, so that the filter clogging detection means 14 uses the filter 7. Identifies it as not clogged.

  Comparing FIG. 4 (a) and FIG. 5 (a), y1 and y2 are almost the same value, but the drying speed is slower because clothes that are harder to dry in FIG. Become slow. The remaining operation time T9 calculated by the dryness detection means 12 in FIG. 5 is longer than T6 in FIG. 4 because the drying speed is slow.

  FIG. 6A shows that the resistance value of the clothing is smaller than a predetermined value by the resistance detection means 11 per unit time when the same ordinary clothing as in FIG. 4 is dried when the filter 7 is clogged. This shows the change over time in the number of times Y is detected. What was y3 at the beginning of operation gradually decreases with the progress of drying, and reaches zero at time t11. Since the filter 7 is clogged as shown in FIG. 6B, the amount of passing air is reduced, and the temperature Th of the temperature sensor 13 disposed in the vicinity of the heater 5 exceeds the determination value Th1. The filter clogging detection means 14 identifies that the filter 7 is clogged. The dryness detection means 12 detects the state of the clothes from the information that the y3, t11, and the filter 7 are clogged, and determines the operation time T12 after the time t11 so that the dry state is appropriate at the end of the operation. Then, as shown in FIG. 6C, the control unit 15 energizes the heater 5 until time t13.

  Comparing FIG. 4 (a) and FIG. 6 (a), y1 and y3 are substantially the same value, but the filter 7 is clogged, so the passing air volume is small, the drying speed is slow, and t11 is t5. Will be slower. The remaining operation time T12 calculated by the dryness detection means 12 in FIG. 6 is longer than T6 in FIG. 4 because the drying speed is slow.

  Comparing FIG. 5 (a) and FIG. 6 (a), y2 and y3 are almost the same value, and t8 and t11 are almost the same value, but T12 is set to be smaller than T9. ing. In other words, even when the clothes that are difficult to dry are dried and when the filter 7 is clogged, even if the drying speed in the first half is almost the same, the time required to reach an appropriate dry state at the end of operation The remaining operating hours are set differently.

  As described above, since the clothes dryer according to the present invention can accurately detect dryness even when the filter is clogged and can finish the operation with a proper dryness, the operation is automatically terminated. It is useful as a clothes dryer.

Block diagram of the clothes dryer according to the first embodiment of the present invention. Vertical section of the clothes dryer Perspective view of electrode of clothes dryer (A) Output characteristic diagram of resistance detection means when ordinary clothing is dried with the clothes dryer (b) Diagram showing time change of temperature sensor when ordinary clothing is dried with the clothes dryer ( c) The figure which shows the time change of heater input when normal clothing is dried with the clothes dryer. (A) Output characteristic diagram of resistance detection means when clothes that are difficult to dry are dried by the clothes dryer (b) A diagram showing a time change of the temperature sensor when clothes that are difficult to dry are dried by the clothes dryer ( c) The figure which shows the time change of heater input when drying clothes which are hard to dry with the clothes dryer. (A) Output characteristic diagram of resistance detection means when ordinary clothes are dried when the filter is clogged with the clothes dryer (b) Temperature when ordinary clothes are dried when the clothes dryer is clogged with the filter (C) A graph showing the time change of the heater input when normal clothing is dried when the filter is clogged with the clothes dryer. Vertical section of a conventional clothes dryer Perspective view of electrode of clothes dryer Output characteristics of the resistance detector of the clothes dryer

DESCRIPTION OF SYMBOLS 1 Main body 2 Motor 3 Fan 4 Rotating drum 5 Heater 7 Filter 8 Electrode 11 Resistance detection means 12 Dryness detection means 13 Temperature sensor 14 Filter clogging detection means 15 Control means

Claims (1)

A heat source, a rotating drum for storing and drying clothes, a blower fan for supplying hot air heated by the heat source into the rotating drum, a filter disposed in the blowing path and collecting lint generated from the clothes, A resistance detection means for detecting the resistance of the clothes in the rotating drum; a dryness detection means for detecting the dryness of the clothes from information of the resistance detection means; a temperature sensor disposed in the vicinity of the heat source; Filter clogging detection means for detecting the degree of clogging of the filter from information from a temperature sensor; and control means for controlling input to the heat source based on information on the dryness detection means and the filter clogging detection means. The control means normally determines that the resistance value of the garment is smaller than a predetermined value by the resistance detection means per unit time from the dryness detection means. The remaining time for input to the heat source is determined from the information on the time change of the number of times of discharge, and when the filter clogging detection means recognizes that the filter is clogged, the remaining time for input to the heat source A clothes dryer configured to perform different settings.