JP2760704B2 - Clothes dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer.

[0002]

2. Description of the Related Art Conventionally, this type of clothes dryer has been disclosed in
This is disclosed in JP-A-7-10399. This control controls the drum to rotate at a high speed during the normal heating operation, and to rotate at a low speed before the end of the operation.

[0003]

In the above conventional example,
At the start of the drying operation, since the clothes are wet, the weight becomes heavier and the entanglement of the clothes is not easily loosened. Therefore, it is necessary to rotate and loosen at high speed. Thereafter, if the clothes are dried to some extent, the weight of the clothes becomes lighter due to the evaporation of moisture.
If the rotation of the drum is kept at high speed, the clothes stick to the inner surface of the drum and it is difficult to dry where the clothes are hardened, so rotate the drum at low speed to stir the clothes and increase the drying efficiency There is a need. However, operating the drum at a uniform low speed irrespective of the amount of clothes (load) causes the following problems.

[0004] That is, when drying one towel (with a small load), it is better to rotate the drum as slow as possible so that the towel hits the drying air better and can be dried faster. This is because the drying air outlet into the drum is located at the bottom of the drum due to its structure, so if the rotation speed of the drum is high, the force of lifting the towel to the top by the rotation of the drum is strong, and it is lifted to the top of the drum However, if the rotation speed of the drum is low, the force to be released is weak, and the towels are located at the bottom of the drum, so that the towels are well exposed to the drying air.

On the other hand, when the drum is rotated at a low speed with a large load, clothing (load) moves up and down in the drum and becomes entangled, causing twisting and wrinkling. If the clothes are twisted or wrinkled, the drying air does not reach that portion, resulting in uneven drying.

[0006] Usually, a cool-down operation is performed to cool the clothes after the drying operation . And in general
Is to rotate the drum and fan with one motor
However, in this case, the drum rotates even during cool down.
If the number, i.e.
The rotation speed remains low, the temperature of the clothing surface is hardly lowered, and it takes time to cool down .

[0007] The present invention solves such a problem.

[0008]

Means for Solving the Problems The means of the present invention for solving the above problems, in the claim 1, and a drum for accommodating clothes, and a motor for rotating the drum, the drying air heated by the heater and the fan supplied to the drum, said
The drying air supplied to the drum is dried from the bottom of the drum.
Drying air blow-out port that blows into the drum, load amount detecting means for detecting the load amount of the clothes in the drum, dry detecting means for detecting the degree of drying of the clothes, and rotational speed control means for controlling the rotational speed of the motor. And controlling the fan, the heater, and the rotation speed control unit based on the detection results of the load amount detection unit and the drying detection unit to execute a drying operation.
It consists of a drying control unit, the drying control unit, the drying dynamic
During the cropping, the drying detection means detects a predetermined degree of drying.
And the subsequent rotational speed of the motor
Clothes dryer for further lowering, said drying control means
After the detection of a predetermined degree of drying by the drying detection means
The decrease in the number of revolutions of the motor is detected by the load amount detecting means.
The configuration is such that the smaller the known load is, the larger the load is.

[0009] In the second aspect, a drum for accommodating clothes, both rotation and fan for supplying the drying air heated to the drum, and the fan and the drum Heater
A motor for controls and dried detecting means for detecting the dryness of the clothes, the rotational speed control means for controlling the rotational speed of the motor, before Symbol fans, the heater and the rotational speed control means, to dry the clothes Drying operation and dry clothing temperature
It consists of a drying control means for sequentially executing a cool-down operation lowering the drying control unit detects a predetermined drying degree at the drying detecting means during the drying operation, the drying operation
In the following, the rotation speed of the motor is
A clothes dryer for reducing drying, wherein the drying control means
During the cool-down operation following the drying operation, the number of rotations of the motor is determined by the drying detection unit to a predetermined degree of drying.
In this configuration, the number of revolutions is increased from the number of revolutions decreased after the detection .

[0010]

According to the first and second aspects of the present invention, the clothing
Has a certain degree of dryness, clothing is easy to loosen, and
When it gets worse, the rotation of the drum is reduced,
Clothes can be agitated without sticking to the inside of the drum.
In addition, in the configuration of the first aspect, the load amount detecting means
Detects the amount of load.
doing. Therefore, in the case of a small amount of clothing,
Drying that can be stirred at the bottom and enters the drum from the drum bottom
The wind hits the clothes efficiently. On the other hand, when there is a lot of clothing
The rotation speed decreases, but the degree of the decrease is small,
No tangling and no twisting or wrinkling.

Further , according to the second aspect of the present invention, the cool down
During operation, increase the motor speed to increase the fan speed.
The temperature of the clothing,
Can be.

[0012]

1 and 2, reference numeral 1 denotes a metal frame having openings on the front and rear surfaces, 2 denotes a metal rear plate for covering the rear opening of the frame 1, and a central portion 2a bulging rearward. It has.

Reference numeral 3 denotes a door which covers the front opening of the frame 1, 4 denotes an annular drum cover which is disposed at the front of the frame 1 and is fixed near the front opening of the frame 1, and 5 denotes a rear portion of the frame 1. A metal support plate is provided on both sides of the frame 1 and fixedly provided, and a plurality of ventilation holes 6 are provided radially from the center.

Reference numeral 7 denotes a support shaft fixedly inserted through the center of the support plate 5 from the front-rear direction. The rear end is fixed to a boss 8 at the center 2a of the rear plate 2 by bolts 9 and washers 10. I have.

Reference numeral 11 denotes a drum formed of a resin such as PP. A drum 12 is fixed to the center of the rear surface, and the front end of the support shaft 7 is rotatably inserted therein. I have. Further, on the rear surface of the drum 11, a drying air outlet 14 composed of a number of through holes or radial slits is formed, and an annular recess 15 is provided so as to surround the outlet 14.

Reference numeral 16 denotes a sealing member made of felt or the like fixed to the annular recess 15 with an adhesive or the like, and slidingly contacts the front surface of the support plate 5 to prevent leakage of drying air. 1
Reference numeral 7 denotes a circulation air passage which communicates a drying air inlet 18 formed on the lower left side of the drum cover 4 with the ventilation hole 6 of the support plate 5, and an L-shaped duct 19 fixed to the drum cover 4.
And a cylindrical circulating casing 20 which is tightly covered and secured to the rear surface of the support plate 5. Reference numeral 23 denotes a honeycomb heater arranged in the circulation air passage 17 so as to face the drying air inlet 18.

The circulating casing 20 is a resin molded product of PP or the like, and integrally forms a downward circulating pipe 21. The circulating pipe 21 is connected to and communicates with the duct 19 at the inner bottom of the frame 1. A drain hole 22 protruding outside the machine is provided vertically at the bottom.

Reference numeral 24 denotes a cooling casing of a resin molded product, which is fixed to the rear side of the circulating casing 20 so as to be continuous, and forms a circulating pipe 21 together with the circulating casing 20.

Numeral 25 denotes a heat exchange type double-sided fan disposed over the circulation casing 20 and the cooling casing 24, and is rotatably supported by the rear portion of the support shaft 7. The circulation casing 20 and the cooling casing 24 form a fan casing of the double-sided fan 25.

Reference numeral 26 denotes a rotation transmitting pulley connected to the double-sided fan 25, and 27 denotes a partition plate provided so as to surround the double-sided fan 25 and formed integrally with the cooling casing 24. By accommodating the double-sided fan 25 in the circular opening at the center of the
7 and the double-sided fan 25 divide the inside of the fan casing into a drying air passage 28 and a cooling air passage 29.

Reference numeral 30 denotes an opening toward the drying air passage 28, concentric rotating grooves formed integrally with the periphery of the double-sided fan 25, 31 denotes an opening toward the cooling air passage 29, and It is a group of concentric fixed grooves integrally formed on the inner peripheral edge.
The rotating groove group 30 is loosely fitted to the fixed groove group 31 in a non-contact state with each other. The rotating groove group 30 and the fixed groove group 31 have a labyrinth seal structure that separates the drying air passage 28 and the cooling air passage 29.

Reference numeral 32 denotes a motor, which is disposed on the inner bottom of the frame 1 and has a pulley 33, an idler pulley 34,
While rotating the drum 11 by the belt 35,
The double-sided fan 25 is rotated by a round belt 37 provided between the rotation transmitting pulley 26 and the fan pulley 36.

Reference numeral 38 denotes an intake port radially formed in the central portion 2a of the rear panel 2, reference numeral 39 denotes an exhaust port for exhausting outside air taken from the intake port 38, and reference numeral 40 denotes a portion where the round belt 37 is stretched. It is a cover bulging out from the rear plate 2 to cover it.

Reference numeral 41 denotes a drying air outlet 14 on the rear surface of the drum 11.
The filter cover 42 attached from the inside so as to cover the filter cover 42 is a mesh filter detachably attached together with the filter cover 41.

L is a thermistor for detecting the temperature of the drying air from the drying air outlet 14, H is a thermistor for detecting the temperature of the inlet of the heater 23, and the thermistors L and H are drying detecting means for detecting the degree of drying of the clothes. Is configured.

During the drying operation, the motor 32 and the heater 2
3 to rotate the double-sided fan 25 and the drum 11. Thus, the drying air heated by the heater 23 is supplied to the drying air inlet 18 → drum 11 → filter 42 → dry air outlet 1
4 → vent 6 → double-sided fan 25 → circulation pipe 21 → duct 1
9 → the heater 23 is circulated in order, and the clothes in the drum 11 are dried. On the other hand, the outside air flows in the order of the intake port 38, the double-sided fan 25, the cooling air passage 29, and the exhaust port 39.

Then, heat is exchanged between the front and rear surfaces of the double-sided fan 25, and the drying air coming out of the drum 11 is dehumidified by the double-sided fan 25. The condensed water droplets at this time are discharged into the duct 19 and discharged out of the machine through the drain holes 22 as water droplets. The dry air dehumidified here is supplied to the heater 2
Heated at 3 is supplied again into the drum 11.

In FIG. 3, reference numeral 43 denotes a rotation speed detection device for detecting the rotation speed of the motor 32, 44 denotes a rotation speed control device for controlling the rotation speed of the motor 32, and 45 denotes a key input unit on which a start key and the like are arranged. , 46 are motor 32, heater 2
3 is a control device for controlling the drying operation (the present invention)
Corresponding to the drying control means) . The control device 46 includes a register A for detecting a temperature difference between the thermistors L and H, a counter 47 for counting the operation time, and a load amount detection device 48 as load amount detection means for determining the amount of clothes (load amount). Have.

The load amount detecting device 48 detects the temperature difference between the thermistors L and H at 15 minutes after the start of operation.
The load amount is determined based on the operation time until the deg rises. That is, if the operation time is short, it is determined that the load is small, and if it is long, it is determined that the load is large.

Such a configuration will be described with reference to the flowchart of FIG. When the start key of the key input section 45 is operated and the counter 47 starts measuring the operation time and starts the drying operation, first, in step S1, the drum 11 is moved to 50r.
The control device 46 instructs the rotation speed control device 44 to drive the motor 32 so that the motor 32 rotates at pm.

Then, it is determined whether or not the counter 47 for counting the operation time has counted 15 minutes in step S2. If not, the operation of step S1 is continued until the counting is performed.

If the counter 47 has counted 15 minutes in step S2, the temperature is detected by the thermistors L and H in step S3, and the value obtained by subtracting the detection value of the thermistor L from the detection value of the thermistor H in step S4, ie, The temperature difference between the thermistors L and H is obtained and stored in the register A of the control device 46.

When it is determined in step S5 that the operation time has elapsed for 15 minutes or more, the thermistor L,
H, the temperature is detected respectively, and thermistors L and H are detected in step 7.
Is determined to have reached the value stored in the register A, that is, the value obtained by adding 2 deg to the temperature difference between the thermistors L and H when 15 minutes have elapsed. If not,
The drum 11 is rotated at 50 rpm until it reaches, and the drying operation is continued.

If it is determined in step S7 that the temperature difference has reached a value obtained by adding 2 deg to the value stored in the register A, the amount of clothes (load) in the drum 11 is determined in step S8.

This load amount determination is performed by the load amount detecting device 48.
Then, the load amount is determined based on the time required to increase by 2 deg from the temperature difference calculated when 15 minutes have elapsed from the start of operation. That is, if the amount of clothes in the drum 11 is small, the amount of moisture in the clothes to be evaporated is small, and therefore, the dry air inlet 18
Is supplied to the drum 11 from the drying air outlet 14 as it is without being deprived of heat by moisture evaporation, and the temperature of the thermistor L rises quickly. If the amount of water is large, the amount of moisture contained in the clothes is large, so that the drying air coming out of the drying air outlet 14 is deprived of heat by the evaporation of water, the temperature of the thermistor L does not rise easily, and the time of 2 deg rise is long. Become. In this embodiment, if the operation time is within 30 minutes, the load is small, and
If it is 60 minutes or more, it is determined that the load is medium.

After the load amount is determined, the rotation speed of the drum 11 is controlled based on the result. That is, step S9
In step S10, it is determined whether the result of the load amount determination is a small load.
pm, the control device 46 controls the rotation speed control device 4
Instruct 4

If it is determined in step S9 that the load is not a small load, then it is determined in step S11 whether the load is a medium load. For medium load, set the rotation speed of the drum 11 to 40 rpm
The control device 46 instructs the rotation speed control device 44 to rotate at. If it is determined in step S11 that the load is not a medium load, the load amount is a large load and the drum 1
1 is rotated at 45 rpm.

In step S14, the temperature is detected by the thermistors L and H, respectively. In step S15, the temperature difference between the thermistors L and H is a value obtained by adding 15 deg to the value stored in the register A, ie, 15 minutes after the start of operation. Thermistors L and H
It is determined whether or not a value obtained by adding 15 deg to the temperature difference is reached. If not, step S9 until it is reached
Steps S15 to S15 are repeated.

When it is determined in step S15 that the time has been reached,
In step S16, the control device 46 instructs the rotation speed control device 44 to rotate the drum 11 at 50 rpm, and executes a cool-down process.

The cool-down process is continued for 15 minutes, and if it is determined in step S17 that 15 minutes have elapsed, the motor 32 is stopped in step S18, and the drying operation ends.

In this embodiment, the load amount is determined in three stages: small, medium and large. However, the present invention is not limited to this, and may be set in multiple stages.

FIGS. 5A and 5B are graphs showing the relationship between the drying efficiency and the load amount. FIG. 5A shows the relationship when the drying operation is performed at a constant rotation regardless of the load amount, and FIG. This shows the relationship when the drying operation is performed.

As described above, by controlling the number of rotations in accordance with the amount of clothes in the drum 11, the drying efficiency is reduced as compared with the drying operation without controlling the number of rotations as shown in FIG. It can be seen that the state is almost horizontal regardless of.

[0044]

According to the first aspect of the present invention, a garment is provided.
When the dryness reaches a predetermined level, the rotation of the drum is
Clothing so that clothing can be stirred without sticking to the inside of the drum.
Stirring is possible, and drying efficiency is improved. In addition, load detection means
To detect the load of clothing, and the less clothing, the higher the rotation speed.
If the amount of clothing is small, dry the clothing.
Dry at the bottom of the drum and enter the drum from the bottom of the drum
When dry wind hits clothing efficiently and there is a lot of clothing
Has no tangling or wrinkling
No. Therefore, the drying efficiency is further improved. Claim of the invention
According to the configuration of Item 2, when the clothing reaches a predetermined degree of drying,
Since the rotation of the drum has been reduced,
Clothes can be agitated without sticking, and drying efficiency is good.
You. In addition, the fan speed during cool down
The temperature of clothing should be lowered quickly because it is raised
Can keep cool down time prolonged.

[Brief description of the drawings]

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

FIG. 2 is a view of the rear face plate of FIG.

FIG. 3 is a control block diagram of the present invention.

FIG. 4 is a diagram showing an operation flowchart of the present invention.

FIG. 5 is a diagram showing a load and drying efficiency.

[Explanation of symbols]

 Reference Signs List 11 drum 25 double-sided fan 23 heater 32 motor 43 rotation speed detection device 44 rotation speed control device 46 control device 48 load amount detection device L, H Thermistor

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Fukuda 2--18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Seiwa Fujikawa 2--18-3 Keihanhondori, Moriguchi-shi, Osaka (72) Inventor Koichi Tanaka 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kazura Kawamura 2-18-18 Keihanhondori, Moriguchi-shi, Osaka (56) References JP-A-63-286190 (JP, A) JP-A-4-220298 (JP, A) JP-A-1-118795 (JP, U) (58) Fields investigated (Int .Cl. ⁶ , DB name) D06F 58/28

Claims (2)

(57) [Claims] 1. A drum for storing clothes, a motor for rotating the drum, a fan for supplying drying air heated by a heater to the drum, and a drying air for supplying to the drum
Blow dry air from the bottom of the drum into the drum
Mouth, load detection means for detecting the load of the clothes in the drum, and dry detection means for detecting the degree of drying of the clothes,
A rotation speed control unit for controlling the rotation speed of the motor, and controlling the fan, the heater and the rotation speed control unit based on the detection results of the load amount detection unit and the drying detection unit to execute a drying operation. It consists of a drying control means,
The drying control means, when a predetermined degree of drying is detected by the drying detecting means during the drying operation, the rotation of the motor thereafter.
With a clothes dryer that reduces the number of turns from the previous number of turns
The drying control means includes a predetermined drying degree detected by the drying detecting means.
Decrease in the number of revolutions of the motor after detecting the
A clothes dryer characterized by increasing the load as the load detected by the load detector is smaller . A drum wherein accommodating clothes, a fan for supplying dry air heated by Heater to the drum, said Dora
A motor for rotating both arm and with said fan, a drying detecting means for detecting the dryness of the clothes, the rotational speed control means for controlling the rotational speed of the motor, before Symbol fan, the heater and the rotation speed control unit controls, and cool-down operation to reduce the temperature of the drying operation and dry clothes to dry the clothes
It consists of a drying control means for sequentially executing, the drying control unit, the dryness detecting dryness in means during the drying operation
Is detected, the subsequent rotation of the motor during the drying operation
A clothes dryer that lowers the number of turns from the previous number of turns.
I, the drying control means, the rotational speed of the motor at the time of cool-down operation following the drying operation, the drying detecting means
A clothes dryer characterized in that after detecting a predetermined degree of drying, the number of revolutions is increased above a reduced number of revolutions .