JPH09313786A - Clothes drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the drying time of a clothes drier. SOLUTION: A circulation air duct 10 of circulating air is provided with an intake/exhaust valve 15 having exhaust valves 15a, 15b discharging the circulating air to the outside and intake valves 15c, 15d sucking the air in an outer frame into the circulation air duct 10. The intake/exhaust valve 15 is operated at the final stage of drying when the moisture contained in clothes is decreased, and a clothes drier is completely switched from circulation dehumidification type drying to exhaust type drying.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a clothes dryer.

[0002]

2. Description of the Related Art A conventional dehumidifying clothes dryer is disclosed in JP-A-5-3.
As described in Japanese Patent No. 17584, an opening valve is provided in a part of the air circulation path toward the air blow side, and when the drying operation of clothes is near the end and dehumidified water is almost not discharged, the opening valve is opened. Is opened to allow the circulating air to escape to the atmosphere.

[0003]

In the above-mentioned conventional dehumidifying clothes dryer, the circulating air is exhausted to the atmosphere by the open valve, but since only a part of the circulating air is exhausted, the effect of switching to exhaust type drying is provided. However, the drying process is similar to that of the circulation dehumidification type, and the drying time is relatively long.

The object of the present invention is to reduce the drying time.

[0005]

In order to achieve the above object, the present invention provides a circulating air passage for dry air, a circulating air exhaust valve for exhausting the dried air, and an air in the outer frame for sucking the air in the circulating air passage. A shared circulating air intake / exhaust valve equipped with both an air intake valve inside the outer frame is provided, and a circulating air exhaust port that is opened and closed by the circulating air exhaust valve is provided on the circulating air duct wall, and further inside the outer frame is on the circulating air duct wall. Provide an air intake port inside the outer frame that is opened by the air intake valve.

With the above structure, the circulating air intake / exhaust valve is operated at the time when the clothes drying operation is almost completed and the dehumidified water is almost completely discharged, and the circulating air exhaust valve is provided on the circulation air passage wall. Open the circulating air exhaust port to exhaust all the circulating air to the outside of the machine, and at the same time, open the air intake port inside the outer frame provided on the circulation air passage wall with the air intake valve inside the outer frame to Intake air into the circulation air passage. As a result, the drying is completely switched from the circulation dehumidification type drying to the exhaust type drying. Therefore, because the dry air is circulated, the circulating air that contains a large amount of moisture is exhausted to the outside of the machine, and instead, the air in the outer frame with a low humidity is sucked in to finish the drying, improving the drying performance. The drying time is shortened.

Further, the air in the outer frame is opened by the air intake valve in the outer frame, and the air in the outer frame sucked into the circulation air passage is the air which is once sucked into the outer frame. At the inner,
The temperature of the drum and the heat exchange fan for cooling and dehumidifying is higher than that of the outside air because it is heated by the heat generated by the motor and the heat released from the drum. Therefore, by sucking the air in the outer frame into the circulation air passage, the amount of heat of the dry hot air blown into the drum after heating the heater can be increased, so that the drying time is further shortened.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a clothes dryer according to an embodiment of the present invention. In FIG. 1, 1 is the outer frame of the clothes dryer, 2
Is a drum rotatably housed inside the outer frame 1, 3 is a circulation fan casing fixed to the outer frame 1, 4 is a drum rotating shaft fixed to the fan casing 3, and 5 is fixed to the inner disk 2a of the drum 2. The drum rotary shaft with the rotary shaft 4 inserted,
6 is a heat exchange fan which is made of plastic and has a circulation fan 6a on one side and a cooling fan 6b on the other side integrally formed on the front and back sides, 7 is a lint filter mounted on the inner side of the drum 2 inside the drum 2, and 8 is an outer frame 1. A cooling fan casing which is fixed and surrounds the cooling fan 6b, 9 is a fan duct connected to the circulation fan casing 3, 10 is a circulation duct which circulates air from the fan duct 9 to the heater duct 11, and is dried by the fan duct 9 and the circulation duct 10. It constitutes a circulating air passage. 11 is a heater duct, 12 is a heater duct 11
A heater provided inside, 13 is a drum support plate provided on the front surface of the drum 2, 13a is a dry hot air inlet hole which is a large number of small holes provided in the drum support plate 13, and 14 is provided on the back side of the outer frame 1. An outer frame back plate, 15 is a circulating air intake / exhaust common valve rotatably provided on the fan duct 9, and 16 is a rotary shaft of the intake / exhaust common valve 15 rotatably attached to the fan duct 9. 17
Is a circulating air exhaust port provided in the fan duct 9, 18 is an outer frame air intake port provided in the fan duct 9, and 19 is a circulation provided between the circulating air exhaust port 17 and the exhaust port 14a of the outer frame back plate 14. Air exhaust duct, 20 is a motor for rotating the drum 2 and the heat exchange fan 6, 21 is a drum pulley attached to the shaft of the motor 20, 22 is the drum 2 and the drum pulley 2
1 is a drum belt hung between the fan belt 23 and 23, a fan pulley provided on the heat exchange fan 6, and 24 is a fan belt hung between the fan pulley 23 and the motor pulley 29. Reference numeral 25 is a clothes insertion port provided in the inner diameter portion of the drum support plate 13, and 26 is a door provided in the front portion of the outer frame 1 for sealing the clothes insertion port 25. Reference numeral 27 denotes a dehumidified water discharge port provided at the bottom of the circulation duct 10, and 28 denotes a temperature sensor provided in the circulation fan casing 3 to measure the temperature of the circulation air.

FIG. 2 is a sectional view showing details of the circulating air intake / exhaust common valve in one embodiment of the present invention.

FIG. 3 is a sectional view showing a circulation air passage of a clothes dryer, an intake / exhaust common valve and its arrangement in one embodiment of the present invention. In FIG. 3, reference numeral 30 denotes the rotary shaft 1 of the intake / exhaust common valve 15.
6 is a valve turning lever, 31 is a solenoid and a plunger for turning the valve turning lever 30, and 35 is an outside air intake hole provided in the side plate of the outer frame 1.

FIG. 4 is a sectional view showing an operating device of a circulating air intake / exhaust common valve according to an embodiment of the present invention. In Figure 4,
30a is a state before the operation of the valve turning lever 30. 31 is a plunger connected to the valve turning lever 30, 32 is a solenoid for attracting the plunger 31, 33 is the valve turning lever 3
A connecting rod connecting 0 and the plunger 31 is a spring for returning the plunger 31 to 31a.

FIG. 5 is a side sectional view showing a driving portion of the heat exchange fan according to the embodiment of the present invention.

Next, the operation of this embodiment will be described.

In FIG. 1, the door 26 is opened and clothes to be dried are put into the drum 2. Then, the motor 20 and the heater 12 are energized. When the motor 20 rotates, the drum pulley 21 rotates and the drum 2 rotates via the drum belt 22. By the rotation of the drum 2, the clothes put in the drum 2 are agitated in the drum 2. When the motor 20 rotates, the motor pulley 29 shown in FIG. 5 rotates, the fan pulley 23 rotates via the fan belt 24 shown in FIGS. 1, 2 and 3, and the rotation of the fan pulley 23 causes the heat exchange fan to rotate. 6 rotates at high speed. In the initial drying process and the intermediate constant drying process in the clothes drying process, the position of the intake / exhaust gas shared valve 15 is set to the pre-operation state 15b of the circulating air exhaust valve part shown by the broken line in FIG. It is in the pre-operation state 15d. In this case, in the fan duct 9, the circulating air exhaust port 17 and the outer frame air intake port 18 are closed by the circulating air exhaust valve part 15b and the outer frame air intake valve part 15d in FIG. It constitutes the circulation air passage.

In FIG. 1, when the heat exchange fan 6 rotates, the dry air sent from the circulation fan 6a passes through the fan duct 9, the circulation duct 10, and is blown to the heater duct 11. The dry air is heated by the heater 12 in the heater duct 11 to become high-temperature hot air. As shown by the arrow, this dry hot air flows into the drum 2 through the dry hot air inflow hole 13a provided in the drum support plate 13. The dry hot air comes into contact with the clothes that are being stirred in the drum 2, evaporates and absorbs the moisture from the clothes, and the humidity is high (90% relative humidity).
Above) becomes hot air. The humid hot hot air passes through the lint filter 7 and is discharged from the drum 2. Drum 2
The dry hot air discharged from the inside enters the circulation fan casing 3 and is sent to the circulation fan 6 a of the heat exchange fan 6.
In the heat exchange fan 6, a cooling fan 6b is formed on the back surface of the circulation fan 6a. When the heat exchange fan 6 rotates, the cooling fan 6b causes the outside air to flow from the intake port of the outer frame back plate 14 as indicated by the dashed arrow, and the heat exchange fan 6b
Passing through the cooling fan 6b into the cooling fan casing 8 and exiting from the outer peripheral portion of the cooling fan 6b, the outer frame back plate 14
Is discharged to the outside of the machine from the cooling air exhaust port 14b. Drum 2
The hot and humid hot air discharged from the cooling fan 6 is discharged on the surface of the circulation fan 6a while flowing along the circulation fan 6a.
It is cooled by the outside air cooling air sucked by b, and moisture is condensed and dehumidified. The cooled and dehumidified dry air is circulated and blown to the fan duct 9, the circulation duct 10 and the heater duct 11 by the circulation fan 6a, is heated again by the heater 12 to become high-temperature dry hot air, and is blown to the drum 2.
The water dehumidified by the heat exchange fan 6 is drained to the outside of the machine through the drain port 27 provided at the bottom of the circulation duct 10.

Next, the operation of the intake / exhaust valve 15 will be described. The temperature of the dry hot air discharged from the drum 2 is measured by the temperature sensor 2. FIG. 6 shows the hot air temperature. FIG.
Then, the temperature of the dry hot air usually changes from APB. In this embodiment, when the clothes in the drum 2 are dried and the amount of water contained in the clothes is reduced, that is, when the temperature of the hot air reaches the point P in FIG. The solenoid 32 indicated by is energized. When the solenoid 32 is energized, the plunger 31 is pulled from 31a to 31 as shown by the arrow, and the valve rotation lever 30 is moved to 30a via the connecting rod 33.
It is rotated about 90 ° from 30 to 30. Valve rotation lever 30
Is rotated about 90 °, the intake / exhaust / exhaust valve 15 becomes
Rotate about 6 from the position indicated by the broken line to the position indicated by the solid line by about 90 °. By this rotation, the circulating air exhaust valve portion 15b of the intake / exhaust common valve 15 is rotated to 15a, and the outer frame air intake valve portion 15d is rotated to 15c. In FIG. 2, when the intake / exhaust common valve 15 rotates about 90 °, the circulating air exhaust valve portion 15a
Closes the circulation air passage of the fan duct 9 and simultaneously opens the circulation air exhaust port 17 provided in the fan duct 9. When the intake / exhaust / exhaust valve 15 is rotated by about 90 °, the outer frame air intake valve portion 15c opens the outer frame air intake port 18 provided in the fan duct 9. When the air inlet 18 in the outer frame is opened, the air in the outer frame flows into the fan duct 9 as indicated by the broken line arrow b. As shown in FIG. 3, the inflowing air in the outer frame is the outside air intake hole 35 of the outer frame 1 as the outside air.
Since it is the air that is once sucked into the outer frame from the above and is heated by the heat generation of the motor 20 and the heat radiation from the drum 2, the air has a higher temperature and a larger amount of heat than the outside air. In FIG. 1, the air inside the outer frame that has flowed into the fan duct 9 from the air inlet 18 inside the outer frame is circulated by the circulation fan 6 a of the heat exchange fan 6 to the fan duct 9, the circulation duct 10, and the heater duct 11. Then, it is heated again by the heater 12 to become high-temperature dry hot air, which is blown to the drum 2. The dry hot air comes into contact with the clothes stirred in the drum 2, evaporates and absorbs moisture from the clothes, and becomes humid hot air. The humid hot dry air is discharged from the drum 2. The dry hot air discharged from the drum 2 enters the circulation fan casing 3, passes through the circulation fan 6 a portion of the heat exchange fan 6, and flows into the fan duct 9. The hot air that has flowed into the fan duct 9 flows out from the circulating air exhaust port 17 as indicated by the solid arrow a,
FIG. 7 shows the drying speed, which is the speed of water evaporation from clothes in the drum 2, through the circulating air exhaust duct 19 and discharged from the exhaust port 14a of the outer frame back plate 14 to the outside of the machine.

In FIG. 7, when the water contained in the clothes disappears and the drying speed reaches the L point where the drying speed becomes zero, the temperature of the dry hot air discharged from the drum 2 becomes the D point in FIG. In this embodiment, if the temperature of the dry hot air reaches point D, the motor 2
0 and the heater 12 are de-energized to complete the drying operation.

The drying rate (g / min) showing the amount of water per minute evaporated from the clothes of this embodiment will be described with reference to FIG. In FIG. 7, in the initial and intermediate steps of drying,
The drying rate is OHIJ. Then, in the drum 2, the temperature of the dry hot air measured by the temperature sensor 2 becomes P point in FIG. 6 at the end of drying when the amount of water contained in the clothes decreases as the clothes dry. Solenoid 3 when reached
2 is energized to rotate the intake / exhaust common valve 15 to completely switch the circulation dehumidification type drying to the exhaust type drying. As a result, all the circulating air containing a lot of humidity is discharged to the outside of the machine. Instead, the air in the outer frame having a low humidity is sucked into the fan duct 9 and the circulation duct 10, and the hot air having a low humidity is blown to the drum 2. In this case, the drying speed is JL as shown in FIG. On the other hand, the drying rate when the dehumidification type drying is not switched to the exhaust type drying is JK. Further, when only the open valve is provided in the wind tunnel of the conventional technique, only a part of the circulating air containing a large amount of moisture is exhausted, so that the drying speed becomes JM.

In the present embodiment, the temperature of the dry hot air measured by the temperature sensor 2 is APCD as shown in FIG.
However, when the dehumidification type drying is not switched to the exhaust type drying, APB is set. Further, when only the open valve is provided in the wind tunnel of the prior art, it becomes APP'E.

According to this embodiment, the intake / exhaust / exhaust valve 15 is rotated by about 90 ° at the end of drying when the clothes are dried in the drum 2 and the amount of water contained in the clothes is reduced. Then, in the circulating air exhaust valve portion 15a of the intake / exhaust common valve 15,
The circulating air passage of the fan duct 9 is closed, and at the same time, the circulating air exhaust port 17 provided in the fan duct 9 is opened. In addition, the outer frame air intake valve portion 15c of the intake / exhaust / exhaust valve 15 opens the outer frame air intake port 18 provided in the fan duct 9 to completely switch the circulation dehumidification type drying to the exhaust type drying. As a result, all the circulating air that has a high absolute humidity and a large amount of humidity due to being circulated is discharged to the outside of the machine, and instead the air inside the outer frame having a low absolute humidity and a low humidity is circulated. Inhale to duct 10,
After being heated by the heater 12, hot air having a low humidity is blown to the drum 2, so that the drying speed is increased and the drying time can be shortened.

The degree of shortening the drying time will be described. According to the experiment (clothing amount: 5 kg), the completion of drying in this example is L in FIG.
It is a point. On the other hand, the end of drying without switching from dehumidification type drying to exhaust type drying is point K in FIG. 7, and the drying time of this embodiment can be shortened by about 20% indicated by the time difference T1. Further, compared with the case where only the open valve is provided in the conventional wind tunnel and only a part of the circulating air containing a large amount of moisture is exhausted, the end of drying when only the open valve is provided in the conventional wind tunnel is at point M. is there. Therefore, the drying time of this example is
It can be reduced by about 10% as shown by T2 compared with the prior art.

According to this embodiment, the intake / exhaust common valve 15 is also used.
Is rotated about 90 ° to open the outer-frame inner-air intake port 18 provided in the fan duct 9 by the outer-frame inner-air intake valve portion 15c of the intake / exhaust common valve 15 to remove the outer-frame inner air. , Into the fan duct 9 and the circulation duct 10. As shown in FIG. 3, the air in the outer frame is temporarily sucked into the outer frame from the outer air intake hole 35 of the outer frame 1 and flows to the outer frame air intake port 18 indicated by an arrow while The air is heated by the heat generated by the motor 20 and the heat radiated from the drum 2, has a temperature about 10 ° C. higher than the outside air, and has a large amount of heat. Therefore, in FIG. 1, the amount of heat of the hot air blown to the drum 2 after being heated by the heater 12 again can be increased, the drying performance can be improved, and the drying time can be shortened. When the degree of shortening of the drying time is viewed from the amount of increase in the amount of heat, the heat generated by the motor 20 is about 100 W, and the heat released from the drum 2 is about 100 W.
W, for a total increase of about 200W. Since switching from the dehumidifying type drying to the exhaust type drying in the present embodiment is performed in the final stage of drying, as shown in FIG. 7, it is effective in about 1/5 in terms of time, and therefore, an increase in the amount of heat of about 40 W can be expected. . Since the heating amount of the heater of the household clothes dryer is about 1000W, the drying time is about 4% from the increase of the heat amount of about 40W.
It can be further shortened.

Next, an embodiment of a device for operating the circulation air intake / exhaust common valve from the initial stage of the drying operation when the clothes are in a small amount or when the clothes are dry and finish drying is explained. To do.

FIG. 8 is a rear sectional view showing a circulating air intake / exhaust common valve and its switching device according to an embodiment of the present invention. 2 to 24 in FIG. 8 correspond to FIGS. 1, 2 and 3. In FIG. 8, 1 is an outer frame, 2 is a drum, 6 is a heat exchange fan, 9 is a fan duct, and 10 is a circulation duct. Fifteen
Is an intake / exhaust common valve rotatably provided in the fan duct 9,
5b is a circulating air exhaust valve part of the intake / exhaust common valve 15, 15d is an outer frame air intake valve part of the common intake / exhaust valve 15, and 16 is a rotating shaft of the common intake / exhaust valve 15. Reference numeral 36 is a valve turning lever provided on the turning shaft 16, and 37 is a connecting wire attached to the valve turning lever 36. 22 is a drum belt, 23 is a fan pulley, and 24 is a fan belt.

FIG. 9 is a perspective view showing the structure of a manual switching device for an intake / exhaust common valve according to an embodiment of the present invention. In FIG. 9, 1 is a right side plate of the outer frame, 1f is a front plate of the outer frame, 2 is a drum, 9 is a fan duct, 10 is a circulation duct, and 16 is a rotating shaft of the intake / exhaust common valve 15. Reference numeral 36 is a valve turning lever provided on the turning shaft 16, and 38 is a valve turning knob provided on the outer frame front plate 1f. Reference numeral 39 denotes a rotation shaft of the valve rotation knob 38, which is rotatably provided on the outer frame front plate 1f. Reference numeral 40 denotes a rotation link attached to the knob rotation shaft 39, and 40 is housed inside the outer frame front plate 1f. 41 is a rotation link 40
The swing spring 1h is attached to the tip of the swing spring 41 and the hook hole 42 of the swing spring 41 is provided on the outer frame front plate 1f.
Is a wire roller rotatably provided at a corner portion in the outer frame 1, 37 is a tip hole of a rotary link 40 and a valve rotary lever 36.
Is a connecting wire that is attached to the distal end of the wire via the wire roller 43. Reference numeral 43 is a lever spring for pulling back the valve rotation lever 36 to 36a before the operation.

FIG. 10 is a perspective view showing the details of the switching knob of the intake / exhaust common valve according to one embodiment of the present invention. In FIG. 10, 38 is a valve turning knob provided on the outer frame front plate 1f, 3
Reference numeral 9 denotes a rotation shaft of the valve rotation knob 38, which is rotatably provided on the outer frame front plate 1f. Reference numeral 40 is a rotary link attached to the knob rotary shaft 39, 41 is a swing spring hung on the tip of the rotary link 40, and 1h is a hook hole of the swing spring 41 provided in the outer frame front plate 1f. , 44 are wire attachment holes provided at the tip of the rotary link 40, and one end of the swing spring 41 is hooked in the attachment hole 44.

Next, the operation of the manual intake / exhaust valve common switching device of this embodiment will be described with reference to FIGS. 8, 9, 10 and 2. In FIG. 9 and FIG. 10, before the operation of the intake / exhaust common valve 15,
It is indicated by a broken line. In FIG. 9, 36a before the valve rotation lever 36 is operated, in FIG. 2, the intake / exhaust common valve 15 is located at the circulating air exhaust valve portion 15b and the outer frame air intake valve portion 15d, which are indicated by broken lines. Since the circulation air exhaust port 17 and the outer frame air intake port 18 provided in the fan duct 9 are closed, the fan duct 9 constitutes a circulation air passage. In FIG. 10, when the valve turning knob 38 is turned from 38a to 38 as shown by the arrow d, the turning link 40 moves to 4 degrees.
Rotate from 0a to 40. The rotation link 40 is positioned at the position 40 by the returning force of the swing spring 41. When the rotation link 40 rotates as shown by the arrow d, the connecting wire 37 is pulled in the c direction. In FIG. 9, when the connecting wire 37 is pulled, the valve rotation lever 36 moves from 36a to 3a.
Rotate to 6 about 90 °. When the valve rotation lever 36 rotates about 90 ° and the valve rotation lever 30 rotates about 90 ° in FIG. 2, the intake / exhaust / exhaust valve 15 has the rotation shaft 16 as an axis and a solid line from a position indicated by a broken line. Rotate to the position of about 90 °. By this rotation, the intake / exhaust / exhaust valve 15 is rotated to the states of 15a and 15c. In this case, the circulating air exhaust valve portion 15a closes the circulating air passage of the fan duct 9 and simultaneously opens the circulating air exhaust port 17 provided in the fan duct 9. Further, the outer frame inner air intake valve portion 15c opens the outer frame inner air intake port 18 provided in the fan duct 9. Air inlet 18 in the outer frame
Is opened, the air in the outer frame flows into the fan duct 9 as shown by the broken line arrow b. And as mentioned above,
In FIG. 1, the air inside the outer frame that has flowed into the fan duct 9 from the air intake port 18 inside the outer frame is the circulating fan 6 of the heat exchange fan 6.
By a, the air is circulated and blown to the fan duct 9, the circulation duct 10, and the heater duct 11, and is heated again by the heater 12 to become high-temperature dry hot air, which is blown to the drum 2. The dry hot air comes into contact with the clothes stirred in the drum 2, evaporates and absorbs moisture from the clothes, and becomes humid hot air.
The humid hot dry air is discharged from the drum 2. The dry hot air discharged from the drum 2 flows into the fan duct 9, exits from the circulating air exhaust port 17 and is discharged to the outside of the machine as shown by an arrow a.

In this embodiment, when the amount of clothes is small or when clothes are dry and finish drying, the intake / exhaust / exhaust valve 15 is manually switched from the initial stage of the drying operation to the exhaust type drying. It is a device. In FIG. 6, the temperature change of the hot air discharged from the drum measured by the temperature sensor 28 in the finish drying is AG in the figure. On the other hand, in the case of the circulation dehumidification type drying without operating the intake / exhaust / exhaust valve 15, the temperature change of the hot air becomes AF, and the completion of the drying is delayed.

According to this embodiment, when the amount of clothes is small,
When clothes are dried and finish drying, the valve rotation knob 38 is rotated to rotate the intake / exhaust / exhaust valve 15 by about 90 °, and the circulation dehumidification type drying is exhaust type drying from the initial stage of the drying operation. Switch to. Therefore, all the air containing a large amount of moisture discharged from the drum is discharged to the outside of the machine, and instead, the outside air with low absolute humidity and low humidity is temporarily sucked into the outer frame, and the air inside the outer frame with low humidity is removed. Since the air is blown to the drum 2 after being heated by the heater, the drying time can be greatly shortened when the amount of water in the clothes is small, the amount of clothes is small, or finish drying.

Further, according to this embodiment, the outer frame front plate 1f
A valve turning knob 38 for operating the intake / exhaust common valve 15
Since the intake / exhaust valve 15 can be easily rotated by rotating the valve rotation knob 38 from the front surface of the outer frame, the circulation dehumidification type drying is switched to the exhaust type drying. Operability is improved. Further, according to the present embodiment, since the operation of the intake / exhaust / exhaust valve 15 is performed by the valve rotation knob 38 and the rotation link 40, it is possible to reduce the cost and use the clothes dryer at a low price as compared with the case of using the solenoid and the plunger. .

Next, an embodiment in which the intake / exhaust valve is provided inside the circulation duct will be described. The purpose of this embodiment is to make it easy to prevent leakage of dehumidified water generated by the heat exchange fan at the valve opening / closing part, and to enable valve installation when there is no space to open / close the valve with the outer frame. To do.

FIG. 11 is a sectional view of a clothes dryer according to an embodiment of the present invention. In FIG. 11, 45 is a circulation duct 1.
0 is a circulating air exhaust valve, 46 is an outer frame air intake valve provided in the circulation duct 10, and 49 is a circulating air exhaust duct provided in the circulation duct 10. 50 is a circulating air exhaust valve 45
And a main valve opening / closing link that operates the air intake valve 46 in the outer frame in conjunction with each other, and 51 is a sub valve opening / closing link connected to the main valve opening / closing link 50.

FIG. 12 is a sectional view of the rotating portion of the circulating air exhaust valve and the outer frame air intake valve of this embodiment. In FIG. 12, 5
Reference numeral 4 denotes a link pin that connects the valve opening / closing main link 50 and the valve opening / closing sublink 51, and reference numeral 55 denotes a pin slot provided on the valve opening / closing sublink 51 and fitted to the link pin 54. 47
Is a circulating air exhaust port provided in the circulating duct 10 and is located at a position opened and closed by a circulating air exhaust valve 45. Reference numeral 48 denotes an air intake port inside the outer frame provided in the circulation duct 10.
It is in a position that can be opened and closed with 6. 49 is a circulating air exhaust port 47
A circulating air exhaust duct connected to the air-conditioning duct 56 is an exhaust port provided in the lower plate 1c of the outer frame 1.

FIG. 13 shows the circulation duct 1 in this embodiment.
It is sectional drawing of the 0 air passage. In FIG. 13, the air duct cross-sectional shape of the circulation duct 10 generally has to be triangular because the circulation duct 10 is provided in the outer frame corner portion between the outer frame 1 and the drum 2.

FIG. 14 is a perspective view of a rotating device for the circulating air exhaust valve and the outer frame air intake valve in this embodiment. FIG.
The shape of the exhaust valve 45 is the same as the shape of the air duct of the circulation duct 10. In this embodiment, the shape is triangular. The shape of the exhaust valve 46 is also the same as the shape of the air duct of the circulation duct 10. And, in this embodiment, the shape is triangular. 57
Is a valve turning lever provided on the turning shaft 52, 58 is a solenoid for turning the valve turning lever 57, 59 is a solenoid 58
A reference numeral 60 is a return spring provided on the plunger 59, 61 is a connecting rod for connecting the valve rotation lever 57 and the plunger 59, and 62 is a valve rotation lever provided on the rotation shaft 52.

Next, the operation of this embodiment shown in FIGS. 11, 12, 13, and 14 will be described.

In FIG. 11, the clothes are dried in the drum 2,
When the temperature of the hot air discharged from the drum measured by the temperature sensor 28 reaches the point P shown in FIG. 4 at the end of drying when the amount of water contained in the clothes has decreased, the solenoid 58 is energized. To do. When the solenoid 58 is energized,
The plunger 59 is pulled, and the valve rotation lever 57 is rotated about 90 ° from 57a to 57 via the connecting rod 61. When the valve rotation lever 57 rotates, the circulating air exhaust valve 4
5 rotates about 90 degrees from 45a to 45 about the rotation shaft 52. In FIG. 12, when the circulating air exhaust valve 45 rotates from 45a to 45 by about 90 °, the circulating air exhaust valve 45 closes the circulating air passage of the circulating duct 10 and simultaneously opens the circulating air exhaust port 47. By opening the circulating air exhaust port 47,
The circulating air flows through the circulating air exhaust port 47 as shown by the arrow f.
Then, the air passes through the circulating air exhaust duct 49 and is discharged out of the machine through the exhaust port 56 of the outer frame.

Further, in FIG. 12, the circulating air exhaust valve 45 has four
When rotating from 5a to 45 by about 90 °, the valve opening / closing main link 50 fixed to the rotating shaft 52 rotates from 50a to 50.
When the valve opening / closing main link 50 rotates, the valve opening / closing slave link 51 rotates from 51 a to 51 via the link pin 54. By the rotation of the valve opening / closing slave link 51, the air intake valve 46 in the outer frame is rotated by about 90 ° from 46 a to 46 a. When the air intake valve 46 in the outer frame rotates about 90 °, the air intake port 48 in the outer frame of the circulation duct 10 is opened. When the outer frame air intake port 48 is opened, the outer frame air is sucked into the circulation duct 10 as indicated by an arrow g. The air in the outer frame sucked into the circulation duct 10 in FIG. 11 is circulated and blown to the heater duct 11 by the heat exchange fan 6, heated again by the heater 12 to become high-temperature dry hot air, and blown to the drum 2. . The dry hot air comes into contact with the clothes stirred in the drum 2, evaporates and absorbs moisture from the clothes, and becomes humid hot air. The humid hot dry air is discharged from the drum 2. The dry hot air discharged from the drum 2 flows into the fan duct 9, passes through the circulation duct 10, and is discharged out of the machine from the circulation air exhaust duct 49 as indicated by an arrow f.

According to the present embodiment, the circulating air exhaust valve 45 is provided at the end of drying when the amount of water contained in the clothes is reduced.
By rotating the outer frame air intake valve 46 by about 90 °, the circulating dehumidification type drying is completely switched to the exhaust type drying. As a result, the absolute humidity is high because it is circulated, and all the circulating air that contains a large amount of moisture is discharged to the outside of the machine. Instead, the air inside the outer frame with low absolute humidity and low humidity is
After being sucked into the circulation duct 10 and heated by the heater 12, hot air having a low humidity is blown to the drum 2, so that the drying speed is increased and the drying time can be shortened.

Further, according to this embodiment, the air inside the outer frame is sucked into the circulation duct 10 from the air inside air inlet 48 of the outer frame by rotating the air intake valve 46 inside the outer frame by about 90 °. The air in the outer frame is heated by the heat generated by the motor 20 and the heat radiated from the drum 2 while the air is sucked into the outer frame and flows to the air intake port 48 in the outer frame. It is air with a high temperature and a large amount of heat. Therefore, the amount of heat of the hot air blown to the drum 2 after being heated by the heater 12 again can be increased, the drying performance can be improved, and the drying time can be shortened.

Further, according to this embodiment, the circulating air exhaust valve 4
5 and the air intake valve 46 in the outer frame are provided in the circulation duct 10 apart from the circulation fan 6a of the heat exchange fan 6 that generates dehumidified water, and the dehumidified water drainage port 27 of the circulation duct 10 is provided.
Since it is provided at the rear of the, it is possible to easily prevent water leakage of dehumidified water.

Further, according to this embodiment, the circulating air exhaust valve 4
5 and the air intake valve 46 in the outer frame are both connected to the circulation duct 1
Since it is configured to rotate inside 0, the circulation duct 10
Even if there is no gap between the outer frame 1 and the outer frame 1, the circulation air exhaust valve 45 and the outer frame air intake valve 46 can be easily connected to the circulation duct 10.
Can be installed in Therefore, the clothes dryer can be downsized.

[0044]

According to the present invention, the intake / exhaust / exhaust valve is rotated by about 90 ° at the end of drying when the clothes are dried in the drum and the amount of water contained in the clothes is reduced. ,
The circulating air exhaust valve section of the intake / exhaust shared valve closes the circulation air passage,
At the same time, the circulating air exhaust port is opened, and at the same time, the outer frame air intake valve part of the intake / exhaust common valve is opened to completely switch the circulating dehumidification type drying to the exhaust type drying. As a result, the circulating air, which has a high absolute humidity and a large amount of humidity because it is circulated, is exhausted to the outside of the machine. Instead, the air inside the outer frame with a low absolute humidity and a low humidity is replaced by the fan duct and the circulation duct. Inhale into
After heating with the heater, hot air having a low humidity is blown to the drum, so that the drying speed is increased and the drying time can be shortened.

Further, according to the present invention, the intake / exhaust common valve has about 9
By rotating it by 0 °, the air intake valve in the outer frame
The air intake port in the outer frame provided in the fan duct is opened, and the air in the outer frame is sucked into the fan duct and the circulation duct. As shown in FIG. 3, the air in the outer frame is heated by the heat generated by the motor and the heat released from the drum while the outer air is once sucked into the outer frame and flows to the air intake port in the outer frame shown by the arrow. The temperature of the air is higher than that of the outside air and the amount of heat is large. Therefore, in FIG. 1, the amount of heat of the hot air blown to the drum after being heated by the heater again can be increased, and the drying performance is improved,
The drying time can be shortened.

Further, according to the present invention, when the amount of clothes is small, or when the clothes are dry and finish drying, the valve rotating knob provided on the front surface of the clothes dryer is manually rotated,
By rotating the intake / exhaust / exhaust valve by about 90 °, the circulating dehumidification type drying is switched to the exhaust type drying from the initial stage of the drying operation. Therefore, all the air containing a large amount of moisture discharged from the drum is discharged to the outside of the machine, and instead, the outside air with low absolute humidity and low humidity is temporarily sucked into the outer frame, and the air inside the outer frame with low humidity is removed. Since the air is blown to the drum after being heated by the heater, the drying time can be greatly shortened when the amount of water in the clothes is small, the amount of clothes is small, or in finish drying.

Further, according to the present invention, since the outer frame front plate is provided with the valve turning knob for operating the intake / exhaust common valve, by turning the valve turning knob from the front of the outer frame,
Since the intake / exhaust / exhaust valve can be easily rotated, the operability of switching the circulation dehumidification type drying to the exhaust type drying is improved.

Further, according to the present invention, since the operation of the intake / exhaust / exhaust valve is performed by the valve rotation knob and the rotation link, the cost can be reduced and the clothes dryer can be made lower in price than the case where the solenoid and the plunger are used. .

Further, according to the present invention, the circulating air exhaust valve and the air intake valve in the outer frame are interlocked with each other to rotate about 90 ° at the end of drying when the amount of water contained in the clothes is reduced. Then, completely switch from circulating dehumidification type drying to exhaust type drying. As a result, the absolute humidity is high because it is circulated, and all the circulating air that contains a large amount of moisture is discharged to the outside of the machine. Instead, the air inside the outer frame with low absolute humidity and low humidity is
After being sucked into the circulation duct and heated by the heater, hot air having a low humidity is blown to the drum, so that the drying speed is increased and the drying time can be shortened.

Further, according to this embodiment, the circulation air exhaust valve and the air intake valve in the outer frame are provided in the circulation duct away from the circulation fan of the heat exchange fan that generates dehumidified water, and the dehumidification of the circulation duct is performed. Since it is provided behind the water drain port, it is possible to easily prevent the dehumidified water from leaking.

Further, according to the present invention, since both the circulating air exhaust valve and the outer frame air intake valve are rotated inside the circulating duct, there is no gap between the circulating duct and the outer frame. Even in such a case, the circulation air exhaust valve and the outer frame air intake valve can be easily installed in the circulation duct. Therefore, the clothes dryer can be downsized.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view of an intake / exhaust shared valve for circulating air according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a circulation air passage and an intake / exhaust common valve according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of an operating device for an intake / exhaust common valve according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a drive unit of a heat exchange fan according to an embodiment of the present invention.

FIG. 6 is a characteristic diagram of a temperature change of hot air discharged from a drum in one embodiment of the present invention.

FIG. 7 is a characteristic diagram of a drying rate of water from clothes in an example of the present invention.

FIG. 8 is a sectional view of an intake / exhaust common valve switching device according to an embodiment of the present invention.

FIG. 9 is a perspective view of a manual switching device for an intake / exhaust gas shared valve according to an embodiment of the present invention.

FIG. 10 is a perspective view of a switching knob of an intake / exhaust common valve according to an embodiment of the present invention.

FIG. 11 is a sectional view of a clothes dryer according to an embodiment of the present invention.

FIG. 12 is a cross-sectional view of rotating portions of a circulating air exhaust valve and an outer frame air intake valve according to an embodiment of the present invention.

FIG. 13 is a cross-sectional view of the air passage of the circulation duct according to the embodiment of the present invention.

FIG. 14 is a perspective view of a rotating device for a circulating air exhaust valve and an outer frame air intake valve according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Outer frame, 2 ... Drum, 3 ... Circulating fan casing, 6
... Heat exchange fan, 6a ... Circulation fan, 6b ... Cooling fan, 8 ... Cooling fan casing, 9 ... Fan duct, 1
0 ... Circulation duct, 11 ... Heater duct, 12 ... Heater,
13 ... Drum support plate, 13a ... Dry hot air inflow hole, 14 ...
Outer frame back plate, 15 ... Intake / exhaust common valve, 15a, 15b ... Circulating air exhaust valve, 15c, 15d ... Outer frame air intake valve, 16
… Rotating shaft for intake / exhaust valve, 17… Circulating air exhaust port, 18
... Outside air intake, 19 Circulating air exhaust duct, 20
... motor, 21 ... drum pulley, 22 ... drum belt,
23 ... Fan pulley, 24 ... Fan belt, 27 ... Dehumidifying water drainage port, 28 ... Temperature sensor, 29 ... Motor pulley.

Claims (9)

[Claims] 1. A drum housed rotatably in an outer frame,
A heat exchange fan that cools and dehumidifies the dry hot air discharged from the drum on the inner side of the drum, a circulation fan casing that surrounds the circulation side fan of the heat exchange fan, and dehumidified air from the circulation fan casing to the heater duct. In a dehumidifying clothes dryer including a circulating air passage for guiding, a heater for heating dry air blown to the drum, and a motor for rotationally driving the drum and the heat exchange fan, the circulating air passage is provided in the circulating air passage. Circulating air provided with a circulating air exhaust valve that simultaneously opens and closes the passage and opens and closes a circulating air exhaust port provided on the wall, and an outer frame air intake valve that opens and closes the outer frame inner air intake port provided on the wall A clothes dryer characterized by having a valve for both intake and exhaust. 2. The circulating air intake / exhaust common valve is operated at the end of drying when the water content in the clothes is reduced, the circulating air exhaust valve closes the circulating air passage, and the circulation provided on the wall. Open the air exhaust port to exhaust all the circulating air flowing in the circulation air passage to the outside of the machine, and further open the outer frame air intake port provided on the wall with the outer frame air intake valve to The clothes dryer according to claim 1, wherein air in the frame is sucked into the circulation air passage to perform a drying operation. 3. A drum housed rotatably in an outer frame,
A heat exchange fan that cools and dehumidifies the dry hot air discharged from the drum on the inner side of the drum, a circulation fan casing that surrounds the circulation side fan of the heat exchange fan, and dehumidified air from the circulation fan casing to the heater duct. In a dehumidifying clothes dryer including a circulating air passage for guiding, a heater for heating dry air blown to the drum, and a motor for rotating and driving the drum and the heat exchange fan, the air passage is provided in the circulating air passage. And a circulating air exhaust valve that simultaneously opens and closes the circulating air exhaust port provided on the wall, and an outer frame air intake valve that opens and closes the outer frame inner air intake port provided on the wall. And a clothes dryer. 4. A drum housed rotatably in an outer frame,
A heat exchange fan that cools and dehumidifies the dry hot air discharged from the drum on the inner side of the drum, a circulation fan casing that surrounds the circulation side fan of the heat exchange fan, and dehumidified air from the circulation fan casing to the heater duct. In a dehumidifying clothes dryer including a circulating air passage for guiding, a heater for heating dry air blown to the drum, and a motor for rotating and driving the drum and the heat exchange fan, the air passage is provided in the circulating air passage. Circulating air provided with both a circulating air exhaust valve that simultaneously opens and closes and a circulating air exhaust port provided on the wall, and an outer frame air intake valve that opens and closes the outer frame air intake port provided on the wall An intake / exhaust common valve, a valve rotating knob for rotating the circulating air intake / exhaust common valve on the outer frame front plate, a rotary link provided inside the outer frame and interlocked with the valve rotary knob, Circulating sky A valve rotation lever provided on the rotation shaft of the intake / exhaust valve is provided, and a connecting wire or transmission means for transmitting the rotation of the rotation link to the valve rotation lever and the circulating air intake / exhaust valve. A clothes dryer characterized in that. 5. A drum rotatably housed in an outer frame,
A heat exchange fan that cools and dehumidifies the dry hot air discharged from the drum on the inner side of the drum, a circulation fan casing that surrounds the circulation side fan of the heat exchange fan, and dehumidified air from the circulation fan casing to the heater duct. In a dehumidifying clothes dryer including a circulating air passage for guiding, a heater for heating dry air blown to the drum, and a motor for rotationally driving the drum and the heat exchanging fan, rotating in the circulating air passage. A circulating air exhaust valve that simultaneously opens and closes a circulating air passage and a circulating air exhaust port provided on a wall, a main rotating shaft of the circulating air exhaust valve, and a valve opening / closing main link fixed to the main rotating shaft. And an outer frame air intake valve that rotates in the circulation air passage and opens and closes an outer frame air intake port provided on the wall,
A clothes dryer comprising: a sub-rotating shaft of the air intake valve in the outer frame; and a valve opening / closing sub-link fixed to the sub-rotating shaft and interlocking with the main rotating shaft. 6. The circulating air exhaust valve is rotated to close the circulating air passage and open the circulating air exhaust port provided in the circulating air passage wall at the end of drying when the water content in the clothes is reduced. , Exhaust all the circulating air flowing in the circulating air duct to the outside of the machine,
Further, the valve opening / closing main link fixed to the main turning shaft of the circulating air exhaust valve and the valve opening / closing sub-link fixed to the sub turning shaft of the outer air intake valve in the outer frame are interlocked to turn the outer frame. The dry operation is performed by rotating the inner air intake valve in the circulation air passage, opening and closing the outer frame inner air intake port provided on the circulation air passage wall, and sucking the outer frame air into the circulation air passage. 5. The clothes dryer according to item 5. 7. The outer frame air intake valve provided in the circulation air passage has the same valve shape as that of the circulation air passage, and the outer frame air intake valve has the same valve shape. The clothes dryer according to claim 5, wherein the air passage has the same shape as the circulation air passage. 8. A clothes dryer characterized in that it is completely switched from dehumidification type drying in which air is circulated to exhaust type drying in which air after the clothes are dried by a drum is exhausted outside the machine. 9. A circulating air intake / exhaust having a valve rotating shaft in the center, a circulating air exhaust valve portion on one side of the valve rotating shaft, and an outer frame air intake valve on the other side of the valve rotating shaft. A clothes dryer characterized by having a valve.