JPH07284596A - Clothes drying machine - Google Patents

Abstract

PURPOSE:To shorten drying time by easily increasing the temperature of circulating air at the operation start of the rotary drum type clothes drying machine provided with a dehumidifying means. CONSTITUTION:Hot air passed through a heater 7 and heated is led into a rotary drum 4 by a heat exchange fan 3, air passed through objects to be dryed and made wet inside the rotary drum 4 is heat-exchanged, and moisture is separated and exhausted to the outside of the machine by introducing cooling air from the outside of the machine. A damper 10 for controlling the quantity of cooling air is provided in the route of cooling air generated by this heat exchange fan 3, and a control means is provided to control the operation of this damper 10. The control means is constituted so that the damper 10 can be closed at the beginning of operations and can be opened after the lapse of prescribed time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drum type clothes dryer having a dehumidifying means.

[0002]

2. Description of the Related Art Heretofore, a clothes dryer of this type has been generally shown in FIGS. 8 and 9. The configuration will be described below.

As shown in FIG. 8, a motor 2 serving as a drive source is provided above the dryer main body 1, and the motor 2 and the heat exchange fan 3 provided on the back side of the dryer main body 1 and the heat exchange. Belts 5 and 6 are stretched between the fan 3 and a rotary drum 4 provided in front of the fan 3 so that the heat exchange fan 3 and the rotary drum 4 are rotated by driving the motor 2.

Further, a heater 7 as a heat source is arranged on the front side of the dryer main body 1, and hot air heated by the rotation of the heat exchange fan 3 is introduced into the rotary drum 4 to be introduced into the rotary drum 4. The object to be dried (clothes) housed in 4 is heated and dried, and the cool air flowing to the back side of the heat exchange fan 3 and the warm moist air on the front side are heat-exchanged by the heat exchange fan 3 to become warm and moist. Moisture in the air becomes water droplets and flows out of the machine through the drainage port 8, and dry air is again introduced into the rotary drum 4 via the heater 7. Arrow A indicates the flow of circulating air, and arrow B indicates the flow of cooling air.

A temperature sensor 9 is provided in front of the heat exchange fan 3 and behind the rotary drum 4 to detect the temperature of the circulating air before heat exchange, and the temperature change indicates the dryness of the material to be dried. It is configured to detect and automatically stop the operation at t2 shown in FIG.

[0006]

In such a conventional clothes dryer, although the air passing through the material to be dried in the rotary drum 4 is not sufficiently heated in the initial stage of operation, the heat exchange fan 3 causes the air to pass through. Since it is heat-exchanged and cooled, it takes a long time t1 until the temperature of the circulating air rises, as shown in FIG.

The present invention solves the above problems, and a first object of the present invention is to easily raise the temperature of the circulating air in the initial stage of operation to shorten the drying time.

A second object is to realize a highly efficient drying operation according to the temperature of the circulating air.

A third object is to realize a more appropriate and highly efficient drying operation according to the temperature change of the circulating air.

[0010]

In order to achieve the above first object, the present invention provides a rotary drum for rotating and stirring an object to be dried, a heater as a heat source, and a heater passing through the heater. A fan for introducing heated hot air into the rotary drum,
Dehumidifying means for exchanging heat of moist air that has passed through the material to be dried in the rotary drum to separate water, a cooling fan for introducing cooling air into the dehumidifying means from the outside of the machine and discharging it to the outside of the machine, and the cooling A damper for adjusting the amount of the cooling air in the path of the cooling air by the fan and a control means for controlling the operation of the damper are provided, and the control means keeps the damper closed at the start of the operation. The first problem-solving means is configured to be opened after a lapse of a predetermined time.

Further, in order to achieve the second object, a rotary drum for rotating and agitating an object to be dried, a heater as a heat source, and hot air heated by passing through the heater are heated in the rotary drum. A fan to be introduced into the inside, a dehumidifying means to heat exchange the moist air that has passed through the material to be dried in the rotary drum to separate water, and cooling air is introduced into the dehumidifying means from outside the machine and exhausted to the outside of the machine. A cooling fan, a damper for adjusting the amount of cooling air in the cooling air path of the cooling fan, a temperature sensor arranged at the inlet of the dehumidifying means, and a temperature from the temperature sensor. Temperature detecting means, comparing means for comparing the temperature detected by the temperature detecting means with a set value, and the damper by the output of the comparing means.
And a control means for controlling the operation of the
A second problem solving means is configured such that the damper is closed at the start of operation, and the damper is opened when the temperature detected by the temperature detecting means becomes higher than a set value. .

In order to achieve the third object, in addition to the above-mentioned second problem solving means, a temperature change rate detecting means for detecting the change rate of the temperature detected by the temperature detecting means is provided, and the comparing means is provided. Compares the temperature change rate detected by the temperature change rate detection means with a set value, the control means closes the damper at the start of operation, and the temperature change rate detected by the temperature change rate detection means. The third problem solving means is that the damper is opened when is smaller than the set value.

[0013]

According to the first means for solving the above problems, the present invention provides:
When the operation is started, the damper is closed, and after the operation for a predetermined time, the drive means opens the damper, so that the circulating air that is not sufficiently heated in the initial operation configures the fan, the dehumidifying means, and the cooling fan. It is possible to prevent the heat from being exchanged by the heat exchange fan and being cooled, and it is possible to easily raise the temperature of the circulating air and shorten the drying time.

Further, according to the second problem solving means, the damper is closed at the start of the operation, and when the temperature detected by the temperature detecting means becomes higher than the set value, the damper is opened so that the circulation is performed. A highly efficient drying operation can be realized according to the temperature of the wind.

According to the third means for solving the problems, the damper is closed by the driving means at the start of the operation, and when the temperature change rate detected by the temperature change rate detecting means becomes smaller than the set value, the damper is opened. I will put it in the open state,
According to the temperature change of the circulating air, it is possible to more appropriately realize highly efficient drying operation.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, the heat exchange fan 3 passes through a fan for introducing hot air heated by the heater 7 into the rotary drum 4 and an object to be dried in the rotary drum 4. A dehumidifying unit that heat-exchanges moist air to separate water therefrom, and a cooling fan that introduces cooling air from the outside of the unit to the dehumidifying unit and exhausts the air to the outside of the unit. The damper 10 is in the path of the cooling air on the back side of the heat exchange fan 3 and can adjust the flow of the cooling air. As shown in FIG.
The microcomputer 11 comprises a time detecting means 12 for detecting the time after the start of operation and a control means 13 for controlling the operation of the damper 10.

The drive means 14 drives the damper 10 in accordance with the control signal output from the control means 13, and the control means 13 starts the operation of the damper-1.
0 is closed, and the damper 10 is opened after a lapse of a predetermined time.

The operation of the above structure will be described with reference to FIG. 3. The damper 10 is oriented so as to block the cooling air B as shown in FIG. 1 until a predetermined time t3 at the beginning of operation shown in FIG. The temperature of the circulating air A rapidly rises. After the elapse of the predetermined time t3, the damper 10 changes its direction so as not to block the cooling air B, as shown by the chain double-dashed line. The temperature of the temperature sensor 9 changes as shown in FIG. As compared with the temperature change of the temperature sensor 9 of the conventional example shown in FIG. 9, since the circulating air A is less likely to be heat-exchanged by the heat exchange fan 3 in the initial stage of operation, it is difficult to cool and the time until the temperature of the circulating air A rises. It is short and more efficient than the conventional one. The drying end time t4 is also shorter than the conventional t2.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the temperature detecting means 15 detects the temperature from the temperature sensor 9. Micro Computer
The controller 16 comprises a comparison means 17 for comparing the temperature detected by the temperature detection means 15 with a set value T1, and a control means 18 for controlling the operation of the damper 10 by the output of the comparison means 17.

The drive means 14 drives the damper 10 in accordance with the control signal output from the control means 18, and the control means 18 starts the operation of the damper-1.
0 is closed, and when the temperature detected by the temperature detecting means 15 becomes higher than the set value T1, the damper 10 is opened.

The operation of the above structure will be described with reference to FIG. 5. At the beginning of the operation shown in FIG. 5, the damper 10 is oriented so as to block the cooling air B as shown in FIG. Rises sharply. If the comparing means 17 determines that the temperature of the temperature sensor 9 detected by the temperature detecting means 15 is higher than the set value T1, the direction of the damper 10 is changed so as not to block the cooling air B after the time t5. . Since the damper 10 is controlled according to the temperature of the circulating air A, highly efficient drying operation can be realized. Then, the drying end time t6 can be shortened.

Next, a third embodiment of the present invention will be described with reference to FIG. The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in the figure, the microcomputer 1
Reference numeral 9 is a temperature change rate detecting means 20 for detecting a change rate of the temperature detected by the temperature detecting means 15 per unit time,
Comparison means 21 for comparing this temperature change rate with the set value ΔT1
And a control means 22 for controlling the damper 10 by the output of the comparison means 21.

The drive means 14 drives the damper 10 in accordance with the control signal output from the control means 22, and the control means 22 is arranged to start the damper-1 at the start of operation.
0 is closed, and the damper 10 is opened when the temperature change rate detected by the temperature change rate detecting means 20 becomes smaller than the set value ΔT1.

The operation of the above structure will be described with reference to FIG. 7. At the beginning of the operation shown in FIG. 7, the damper 10 is oriented to block the cooling air B as shown in FIG. Rises sharply. Temperature change rate detection means 20
If the comparison unit 21 determines that the rate of change in temperature per unit time detected by the temperature sensor 9 is smaller than the set value ΔT1, the damper 10 does not block the cooling air B after the time t7. Change the orientation. Since the damper 10 is controlled according to the temperature change of the circulating air A, a highly efficient drying operation can be appropriately realized. And
The drying end time time t8 can be shortened.

[0028]

As described above, according to the present invention, the rotating drum for rotating and stirring the material to be dried, the heater as the heat source, and the hot air heated by passing through the heater are introduced into the rotating drum. A fan to be introduced, a dehumidifying means for exchanging heat by exchanging moist air that has passed through the material to be dried in the rotating drum, and cooling for introducing cooling air from outside the machine to the dehumidifying means and exhausting it outside the machine. A fan, a damper for adjusting the amount of cooling air in the cooling air path by the cooling fan, and a control means for controlling the operation of the damper are provided, and the control means includes the damper at the start of operation. Since − is closed and opened after a lapse of a predetermined time, the circulating air that is not sufficiently heated at the beginning of operation is heat-exchanged by the heat exchange fan that constitutes the fan, dehumidifying means, and cooling fan. Done Can be prevented from being cooled, the temperature of the circulating air can be shortened to the drying time tends to rise.

A rotary drum for rotating and stirring the material to be dried, a heater as a heat source, and a fan for introducing hot air heated by passing through the heater into the rotary drum,
Dehumidifying means for exchanging heat of moist air that has passed through the material to be dried in the rotary drum to separate water, a cooling fan for introducing cooling air into the dehumidifying means from the outside of the machine and discharging it to the outside of the machine, and the cooling A damper for adjusting the amount of cooling air in the path of the cooling air by the fan, a temperature sensor arranged at the inlet of the dehumidifying means, a temperature detecting means for detecting the temperature from the temperature sensor, and the temperature The control means comprises a comparing means for comparing the temperature detected by the detecting means with a set value, and a control means for controlling the operation of the damper by the output of the comparing means.
Is closed, and the damper is opened when the temperature detected by the temperature detecting means becomes higher than a set value, so that a highly efficient drying operation is realized according to the temperature of the circulating air. can do.

The temperature change rate detecting means for detecting the temperature change rate detected by the temperature detecting means is provided, and the comparing means compares the temperature change rate detected by the temperature change rate detecting means with a set value. Since the control means is configured to close the damper at the start of operation, and to open the damper when the temperature change rate detected by the temperature change rate detecting means becomes smaller than a set value, According to the temperature change of the circulating air, it is possible to more appropriately realize highly efficient drying operation.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a clothes dryer according to a first embodiment of the present invention.

FIG. 2 is a block diagram of the clothes dryer.

FIG. 3 is a diagram showing a time change of a temperature detected by a temperature sensor of the clothes dryer.

FIG. 4 is a block diagram of a clothes dryer according to a second embodiment of the present invention.

FIG. 5 is a diagram showing a time change of a temperature detected by a temperature sensor of the clothes dryer.

FIG. 6 is a block diagram of a clothes dryer according to a third embodiment of the present invention.

FIG. 7 is a diagram showing a time change of a temperature detected by a temperature sensor of the clothes dryer.

FIG. 8 is a vertical sectional view of a conventional clothes dryer.

FIG. 9 is a diagram showing a time change of a temperature detected by a temperature sensor of the clothes dryer.

[Explanation of symbols]

 3 Heat Exchange Fan (Fan, Dehumidifying Means, Cooling Fan) 4 Rotating Drum 7 Heater 10 Damper 13 Control Means

Claims (3)

[Claims] 1. A rotary drum for rotating and stirring an object to be dried, a heater as a heat source, a fan for introducing hot air heated by passing through the heater into the rotary drum, and the rotary drum. A dehumidifying means for exchanging heat by exchanging moist air that has passed through the material to be dried inside to separate moisture, and a cooling fan for introducing cooling air from outside the equipment to the dehumidifying means and exhausting the air to the outside of the equipment,
The cooling fan is provided with a damper for adjusting the amount of cooling air in the path of the cooling air, and a control means for controlling the operation of the damper, and the control means closes the damper at the start of operation. The clothes dryer is configured to be opened and opened after a predetermined time has elapsed. 2. A rotary drum for rotating and stirring an object to be dried, a heater as a heat source, a fan for introducing hot air heated by passing through the heater into the rotary drum, and the rotary drum. A dehumidifying means for exchanging heat by exchanging moist air that has passed through the material to be dried inside to separate moisture, and a cooling fan for introducing cooling air from outside the equipment to the dehumidifying means and exhausting the air to the outside of the equipment,
A damper for adjusting the amount of cooling air in the cooling air path by the cooling fan, a temperature sensor arranged at the inlet of the dehumidifying means, and a temperature detecting means for detecting the temperature from the temperature sensor, The control means comprises a comparison means for comparing the temperature detected by the temperature detection means with a set value, and a control means for controlling the operation of the damper according to the output of the comparison means. The clothes dryer is configured so that the damper is opened when the temperature detected by the temperature detecting means becomes higher than a set value. 3. A temperature change rate detecting means for detecting a temperature change rate detected by the temperature detecting means, wherein the comparing means compares the temperature change rate detected by the temperature change rate detecting means with a set value. The control means is configured to close the damper at the start of operation and to open the damper when the temperature change rate detected by the temperature change rate detecting means becomes smaller than a set value. 2. The clothes dryer according to 2.