JPH04197400A - Clothing dryer - Google Patents

Abstract

PURPOSE:To perform only a blast operation without exciting a heat source for a preset period to cool a drying chamber when the drying operation is temporarily stopped, and to perform only a blast operation without exciting the heat source to cool the drying chamber when the operation is temporarily stopped. CONSTITUTION:When a start/temporary stop switch 44 is operated alone, the operation is immediately stopped, when the start/temporary stop switch 44 is pushed while another switch, e.g. a heater transfer switch 45, is pushed, the operation may be stopped after performing a blast operation. The blast operation is performed for a preset period or until the temperature of the air discharged from a rotary drum is lowered to a preset value, or the operation time may be determined by another method. For the temporary stop during the drying operation, only a blast operation is automatically performed to cool the rotary drum, if the operation is temporarily stopped and a user puts a hand into the rotary drum to confirm the drying degree, there is no fear of a burn.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a clothes dryer.

[Conventional technology]

In general, clothes dryers do not turn on electricity to the heat source before the end of drying operation and only operate the air blower to keep the drying chamber cool. First, the drying room was so hot that there was a risk of burns when users put their hands into the clothes to check if they were dry.

[Problem to be solved by the invention]

As mentioned above, conventional clothes dryers have a problem in that if you temporarily stop the clothes dryer during operation to check the dryness and put your hand inside the drying chamber, you may get burned because the inside of the drying chamber is hot.

An object of the present invention is to cool the inside of the drying chamber even when the drying chamber is temporarily stopped during operation, thereby eliminating the risk of burns.

[Failure to solve the problem]

In order to achieve the above-mentioned object, the present invention is such that even when the drying chamber is temporarily stopped during operation, the heat source is not energized and only air is blown, so that the inside of the drying chamber is not cooled down.

[Effect]

According to the present invention, even when the drying is temporarily stopped during drying, the heat source is not energized and only air is operated to cool down the drying chamber, so the user can check the dryness of the clothes while the drying is in progress. This eliminates the risk of getting burned even if you put your hands inside the drying room.

〔Example〕

An embodiment of the invention will be described below with reference to the drawings.

2 is an outer frame, 2 is a rotary drum that is rotatably supported within this outer frame 1 and constitutes a clothes drying cabinet, 3 is a heat source for obtaining hot air for drying, and 4 is the rotary drum 2. electric motor 5
This is a drum drive belt for transmitting rotational force.

A drum air outlet 6 for discharging circulating air for drying is provided at the rear of the rotating drum 2, as indicated by a solid line arrow in FIG. It has the role of a blower for generating the circulating air and cooling air (indicated by a broken line in FIG. 1) for cooling the circulating air flow,
In addition, a fan casing 9 is provided which accommodates a double-winged fan 8 for exchanging heat between circulating air and cooling air through its blade wall surface. This fan casing 9 has a partition plate 10 provided all around its inner circumference,
A felt 11 provided on the outer periphery of the double-winged fan 8 partitions it into a circulating air side and a cooling air side.

Reference numeral 12 denotes an airtight felt for keeping the fan casing 9 and the rotating drum 2 airtight.

The circulation side outlet of the fan casing 9 is communicated with the heat source device 3 through ducts 1 to 13 and a duct 14 having a drainage port 21 in the middle. Further, the cooling air flow is sucked in through an intake port provided at the center of the back plate 15, as shown by the dashed arrow in FIG.

In addition, 16 is a belt for the double-winged fan 8, 17 is a pulley for the double-winged fan 8, 18 is a drum support member, and 19 is used to open and close an opening provided in front of the outer frame 1 for taking in and taking out items to be dried (clothing). 22 is a filter; 20 is a drum front fixed wall for rotatably supporting the rotating drum 2 on its outer periphery.

Next, the operation control method will be explained.

FIG. 2 shows a control circuit for a clothes dryer according to the present invention. 2
3 is a power plug connected to a 100V commercial power supply; 24 is a power switch; 25 is a microcomputer 26 containing a clothes dryer operation control program and a power supply circuit for supplying DC voltage to a control electronic circuit; 27 is a transformer for stepping down the voltage of 100V of the commercial power supply to the voltage for electronic circuits; 28 is the microcomputer-2;
6 is a circuit to reset 1 for resetting when the power is turned on; 29 is a clock circuit that generates a system clock necessary for the microcomputer 26; 30 is a circuit for setting a drying course for the microcomputer 26 and setting the strength of the heat source; A switch input section 31 transmits switch inputs selected by the user such as the start of operation to the microcomputer 26, and a switch input section 31 is used to indicate the operating status of the clothes dryer, the drying course, the fact that the filter 22 is clogged, etc. by turning on a lamp or The lamp display section 32, which flashes to notify the user, sounds a buzzer when the microcomputer 26 accepts the operation of the input switch, when the operation is completed, when the filter 22 is clogged, etc. A buzzer notification section 33 detects changes in the humidity and temperature of the circulating air to detect the degree of dryness of the clothes.34 is a dryness detection means for detecting the degree of dryness of clothes by detecting changes in the humidity and temperature of the circulating air. dryness detection circuit for transmitting to, 35
36 is a door switch that is turned ON and OFF as the door 19 is opened and closed, and 36 is a door switch that is turned ON.

A door switch input receiving circuit 37 transmits the OFF state to the microcomputer 26, and 37 transmits the ON/OFF state of the power switch 24 to the microcomputer 2.
power switch input capture circuit for transmission to 6, 3
Reference numeral 8 denotes a power supply for energizing a solenoid 39 for turning off the power switch 24 to automatically turn off the power switch 24 when the operation ends or when the power switch is left on for a certain period of time without operation. 40 is a frequency signal acquisition circuit for inputting the frequency of the power source used for timekeeping into the microcomputer 26; 41 is a motor drive circuit for driving the electric motor 5 with a signal from the microcomputer 26; 42 is a heat source drive circuit for driving the heat source 3 with a signal from the microcomputer 26, and 43 is a heat source current detection circuit for detecting the current of the heat source 3.

FIG. 3 shows an embodiment of the switch input section 30 and the lamp display section 31, where 44 is a start/pause switch for starting or temporarily stopping operation, and 45 is a start/pause switch. A heater changeover switch 46 is used to change the strength of the heat source 3, and a drying course changeover switch 46 is used to change the drying course.

Next, the operation of the clothes dryer will be explained.

When the power plug 23 is inserted into an outlet, the power supply circuit 25 generates a DC voltage, and the clock generation circuit 29 transmits a system clock to the microcomputer 26. At the same time, two reset circuits
8, the microcomputer 26 is reset to an operating state, and the clothes dryer is placed in a state awaiting operation by the user. When the user turns on the power switch 24, this information is transmitted to the microcomputer via the power switch manual input circuit 37, a preset initial display is displayed on the lamp display circuit 31, and the switch of the switch manual input section 31 is transmitted to the microcomputer via the power switch manual input circuit 37. The situation is such that human power can be used.

Next, the user opens the door 19 and puts clothes to be dried into the rotating drum 2. When the door 19 is closed, the door switch 35 is turned on, and the door 19 passes through the door switch input input circuit 36. The information indicating that the microcomputer 26 has been closed is input to the microcomputer 26, and the microcomputer 26 waits for the start of operation. Next, the user selects one of several drying courses using the drying course selection switch 46 of the switch manual section 30 and the strength of the heat source 3 using the heater selection switch 46, and presses the star 1-/pause switch 44. When operated, the clothes dryer starts drying operation.

When the drying operation is started, the heat source 3. Electric power is supplied to the electric motor 5, and the rotating drum 21 and double-winged fan 8 rotate.

As a result, circulating air heated by the heat source 3 flows into the rotary drum 2, removes moisture from the material to be dried, is discharged from the rotary drum 2, and is sucked into the double-blade fan 8. When the drying material passes through the double-winged fans, it is cooled by the cooling air due to the heat exchange effect of the double-winged fans 8, and the moisture taken from the dried material condenses into water droplets and is discharged from the drain port 21 to the outside of the machine. The circulating air that has passed through the double wing fans 8 is transferred to the duct 13.1.
4, it reaches the heat source 3 again, where it is heated and flows into the rotating drum 2, and this process is repeated continuously to advance drying. When the clothes are dry, the dryness detection means 33 detects this, and this is transmitted to the microcomputer 26 via the dryness detection circuit 34. When it is transmitted that the clothes are dry, the microcomputer 26 issues a command to the motor drive circuit 41 and the heat source drive circuit 42 according to a predetermined program to terminate the operation. After a predetermined period of time has passed after the end of the operation, an instruction is given to the power switch disconnection circuit 38 to automatically disconnect the power switch 24.

During the drying operation, if the operation is to be temporarily stopped to check the degree of drying, etc., the start/pause switch 44 is operated.

When this is operated, in order to cool down the inside of the rotating drum (drying chamber) 2, the heat source 3 is programmed to be operated only by blowing air without energizing it for a predetermined period of time, and then stopped.

Note that when the start/pause switch 44 is operated alone, the operation is stopped immediately, and when the start/pause switch 44 is pressed while holding down another switch (for example, the heater changeover switch 45), the above-mentioned ventilation operation is started. The operation may be stopped after performing the above steps. Further, the blowing operation may be carried out for a preset time, or may be carried out until the temperature of the air discharged from the rotating drum falls to a predetermined value, or the operating time may be determined by other methods.

〔Effect of the invention〕

According to the present invention, as described above, even when the drying operation is temporarily stopped, only the air blowing operation is automatically performed to cool the inside of the rotating drum (drying chamber).
If the user pauses during operation to check the dryness, etc.
To provide a clothes dryer in which there is no risk of getting burned even when a hand is put into the rotating drum.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a block diagram of a control circuit, and FIG. 3 is a diagram showing an embodiment of a switch input section and a lamp display section. 1... Outer frame, 2... Rotating drum, 3... Heat source, 5...
...Electric motor, 8...Double wing fan, 22...Filter, 30...Switch input section, 44...Star 1-
/Pause switch, 45...Heater changeover switch.

Claims (1)

[Claims] 1. A drying chamber for drying objects to be dried, a blower fan for sending air to the drying chamber, an electric motor for rotationally driving the blower fan, and a heat source for heating the air sent to the drying chamber. 1. A clothes dryer, characterized in that when the drying operation is temporarily stopped, the operation is controlled so that the heat source is not energized for a specified period of time and only air is blown to cool the inside of the drying chamber.