JPH0956991A - Clothing drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make circulation air even and at the same time make the whole compact, in the case of a clothing drier to dry clothing by circulating hot air into a rotary drum to be rotatingly driven by means of a motor. SOLUTION: A rotary drum 2 is provided rotatably in an outer frame 1, and the heat exchange of circulating air and cooling air is carried out by a fan 3 of both blades and at the same time, ventilation is conducted, and a baffle 12 having plural holes 12b is fixed at the outer periphery part of the rotary drum 2. An approximately cylindrical inside seal is fixed at the outer periphery of an air intake hole provided at the approximate center part of a circulation side fan case 6, and an approximately cylindrical outside seal is fixed to the outer periphery of each heater 11, and the air flow of the circulation passage of the circulation air is formed airtighly, Plural blowing-off openings 6b of the circulation side fan case 6 are provided and the heaters 11 are provided at point symmetry positions, and at positions other than the positions of the heaters 11 in the outer frame 1, a motor 8 and a connector 17 to connect the lead wires 16 of the heaters 11 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clothes dryer which circulates warm air in a rotary drum which is rotationally driven by a motor to dry clothes.

[0002]

2. Description of the Related Art Conventionally, a clothes dryer has been constructed as shown in FIG. Hereinafter, the configuration will be described.

As shown in the figure, the outer frame 1 is rotatably provided with a rotary drum 2 for accommodating clothes, stirring and drying them. The double-blade fan 3 exchanges heat between the cooling air 4 and the circulating air 5 and has an air blowing function, and is rotatably housed in the circulating fan case 6. The shaft 7 pivotally supports the rotary drum 2 and the double-blade fan 3. Motor 8
Drives the rotary drum 2 and the double-blade fan 3 to rotate. The back plate 9 covers the rear surface of the outer frame 1 and is provided with an intake / exhaust port 9x for intake / exhaust of the cooling air 4.

The circulation side fan case 6 is provided with a recessed portion for enclosing the two-blade fan 3 having a plurality of rings 3c having a tooth-shaped cross-section on the outer periphery, and as a seal for the circulating air 5, a vortex is swirled outward from the ring 3c of the both-wing fan 3. It forms the chamber 6d. The circulation side fan case 6 is provided with an intake hole 6a at a substantially central portion and a blowout port 6b at a substantially outer peripheral portion.

The cooling side fan case 10 is formed by the flange 6c extending on the circulation side fan case 6 and the back plate 9. The heater 11 is provided close to the air outlet 6b of the circulation side fan case 6. The rotary drum 2 is provided with an intake port 2a at a substantially central portion of a rear surface thereof and a plurality of blower ports 2b at an outer peripheral portion thereof so as to face the heater 11. Then, the wind tunnel 12a communicating with the air blow port 2b and the plurality of air blow holes 12 are provided.
A baffle 12 having b is fixed to the outer peripheral portion of the rotary drum 2. Further, a substantially cylindrical inner seal 13 is provided on the outer periphery of the intake hole 6a of the circulation fan case 6, and the heater 1
1, a substantially cylindrical outer seal 14 is provided on the outer periphery of the intake hole 6
a and the air outlet 6b are airtightly separated from each other.

In the above structure, when the motor 8 rotates, the rotary drum 2 and the both-wing fan 3 rotate. When the double-blade fan 3 rotates, cooling air 4 and circulating air 5 are generated, and the circulating air 5 reaches the circulating fan case 6 and is blown from the outlet 6b of the circulating fan case 6 through the heater 11 to the inner seal 13 and the outer side. It passes between the seal 14 and the blower port 2b of the rotary drum 2, reaches the blower hole 12b from the wind tunnel 12a of the baffle 12, is introduced into the rotary drum 2 to dry the clothes, and the intake port 2a of the rotary drum 2 is introduced. To form a flow of the intake hole 6a of the circulation side fan case 6 and the double-blade fan 3. On the other hand, the circulating wind 5 that has exchanged heat with the clothes and has become hot and humid becomes condensed water, and is drained to the outside of the outer frame 1 through the drain port 15.

[0007]

In such a conventional clothes dryer, the circulation side fan case 6 has only one outlet 6b, so that the circulation air passing through the outlet 6b of the circulation side fan case 6 is provided. There was a problem that it was difficult to circulate 5 smoothly.

The outlet 6b of the circulation side fan case 6
Has a configuration in which the partition plate 6e forms a curved wind tunnel and the circulating air 5 is introduced into the heater 11, but the partition plate 6e cannot be attached and removed from the rear side, and dust behind the heater 11 can be cleaned by a fan case. 6 and the rotary drum 2 have to be performed separately, and there is a problem that the work time is very long. Moreover, the wind noise at the partition plate 6e is large, and the condensed water after heat exchange passes through the outlet 6b. There was a risk that it would enter the heater 11.

In addition, when water such as rainwater splashed from above intrudes from the mating surface of the outer frame 1 and the back plate 9, there is a problem that the intruded water may be applied to electric components such as the motor 8. .

Further, the drain port 15 of the circulation side fan case 6
Since it is open, there is a problem that the circulating air 5 leaks from the drainage port 15, the thermal efficiency is lowered, and the drying time is prolonged.

Further, the heater 11 is a circulation side fan case 6
The lead wire provided in the vicinity of the blower outlet 6b and connected to the heater 11 is led out along the circulation side fan case 6, so that it is difficult to hold the lead wire stably and may come into contact with the rotary drum 2. was there.

The lead wire connected to the heater 11 is
Since it is led out through the gap of the circulation side fan case 6, there is a problem that the circulating air 5 leaks through the gap where the lead wire is led out, and the drying performance and dehumidification performance are deteriorated.

The lead wire connected to the heater 11 is
Since it is led out along the circulation side fan case 6, there is a problem that condensed water may leak along the lead wire or water may enter from above.

The present invention is intended to solve the above problems, and it is a first object of the present invention to make the circulating air passing through the air outlet of the circulation side fan case uniform and to make the whole compact.

A second object is to reduce wind noise caused by a partition plate provided on the circulation side fan case and to prevent heat-exchanged condensed water from entering the heater section.

A third object is to prevent water, such as rainwater, splashed from above from entering electric components such as a motor and a connector.

A fourth object of the present invention is to prevent leakage of circulating air from the drain port, improve thermal efficiency and shorten drying time.

A fifth object is to easily hold the lead wire and perform safe lead wire processing.

A sixth object is to prevent the circulating air from leaking from the heater section and improve the drying performance and dehumidification performance.

A seventh object is to prevent dew condensation water from leaking through the lead wire connected to the heater and preventing water from entering from above.

[0021]

In order to achieve the above first object, the present invention is rotatably disposed in an outer frame, has an intake port at a substantially central portion of a rear surface thereof, and has a plurality of blower ports. A rotary drum, a double-blade fan that exchanges heat between circulating air and cooling air and has a blowing function, a shaft that pivotally supports the rotary drum at the rear and a shaft that axially supports the double-blade fan, and an intake hole of the double-blade fan. A circulation side fan case having a substantially central portion and a blower outlet provided at a substantially outer peripheral portion, a heater provided near the blower outlet of the circulation side fan case, and a plurality of wind tunnels communicating with the blower port of the rotary drum. Baffles with individual air blow holes fixed to the outer periphery of the rotating drum, a substantially cylindrical inner seal fixed to the outer periphery of the intake hole provided at the approximate center of the circulation side fan case, and fixed to the outer periphery of the heater A substantially cylindrical shape And a side seal, and the air outlet of the circulation side fan case, the heater, the air outlet of the rotary drum, the air outlet of the baffle, the air inlet of the rotary drum, the air intake hole of the circulation side fan case, the air outlet of the circulation side fan case. An air flow in the circulation path is formed airtightly, a plurality of outlets of the circulation side fan case are provided, heaters are arranged at point symmetrical positions, and a motor and the above-mentioned position are provided in the outer frame other than the heater position. The first problem solving means is to dispose a connector for connecting the lead wire of the heater.

In order to achieve the second object, the air outlet of the circulation side fan case of the first problem solving means forms a curved wind tunnel with a partition plate to introduce the circulating air from the heater. A heater is arranged at the rear of the partition plate, and the protrusion is detachably used as a handle, and a slope portion having a substantially triangular cross section is provided upstream of the circulating air of the circulation side fan case with respect to the protrusion. Forming in the streamline direction is the second means for solving the problem.

In order to achieve the third object, in addition to the means for solving the first problem, a cooling side fan case for introducing cooling air into the circulation side fan case and exhausting the cooling air is provided. The cooling side fan case is welded to and integrated with the fan case, and a gutter-shaped groove is formed so that the gutter-shaped groove is located substantially below the mating surface between the outer frame and the back plate. This is the third means for solving the problem.

Further, in order to achieve the fourth object, in addition to the means for solving the first problem, the circulation side fan case is provided with a drainage port for draining condensed water, and a mountain shape is provided above the drainage port. The fourth problem solving means is to provide the protrusions at a predetermined distance.

Further, in order to achieve the fifth object, the circulation side fan case of the first problem solving means is made of synthetic resin, and a plurality of pairs of substantially conical pins are provided, above the pins. A fifth problem solving means is to press the portion to make the interval between the pins narrower than the diameter of the lead wire and hold the lead wire.

In order to achieve the sixth object, the circulation side fan case of the first problem solving means is provided with an opening for leading out the lead wire of the heater below the outer seal.
A sixth problem solving means is that the opening is closed by a closing member made of an elastic body.

In order to achieve the seventh object, the lead wire of the heater of the first problem solving means is concentrated and led out either substantially above or substantially below the seventh problem solving means. I am trying.

[0028]

According to the first problem solving means of the present invention, a plurality of air outlets of the circulation side fan case are provided at point symmetrical positions, and heaters are provided in proximity to the respective air outlets so that a large amount of heat energy is circulated. Can be supplied to
By providing a plurality of outlets, the amount of circulating air can be increased, the drying time can be shortened and the clothes can be prevented from being damaged, and the heaters are arranged at point symmetrical positions to circulate the fan on the circulation side. The circulating air passing through the air outlet of the case can be made uniform, and a connector for connecting the motor and the lead wire of the heater is arranged at a position other than the heater position of the outer frame, thereby making the whole compact. be able to.

Further, according to the second means for solving the problem, when the heater is clogged with dust or the like, the partition plate can be removed to easily clean the heater, and the fan case of the circulation side fan with respect to the projection of the partition plate can be removed. The slope part formed in the streamline direction in the upstream part of the circulating air can reduce wind noise caused by the partition plate and prevent heat-exchanged condensed water from entering the heater part. You can

Further, according to the third means for solving the problems, when rainwater or the like is splashed from above the outer frame, the water that has entered from the mating surface of the outer frame and the back plate is circulated to the circulation side fan case and the cooling side fan case. Since they are welded and integrated, they can be discharged through the trough-shaped groove portion without entering the fan case, and can be prevented from entering electric components such as a motor and a connector.

Further, according to the fourth problem solving means, since the mountain-shaped protrusions are provided at a predetermined distance above the drainage port provided in the circulation side fan case, the protrusions circulate from the drainage port. It is possible to prevent the leakage of wind, improve the thermal efficiency and shorten the drying time.

Further, according to the fifth means for solving the problems, the lead wire can be easily held by the plurality of pairs of substantially conical pins provided on the circulation side fan case, and there is no possibility of contacting the rotating drum. Safe lead wire processing is possible.

According to the sixth means for solving the problems, the lead wire of the heater is led out from the opening provided in the circulation side fan case, and the opening is closed by the closing member formed of the elastic body, so that the opening is closed. It is possible to completely close it, prevent circulating air from leaking, and improve drying performance and dehumidification performance.

Further, when the lead wire of the heater is led out substantially upward by the seventh means for solving the problem, the condensed water does not leak through the lead wire, and it is concentrated substantially downward. If it is led out in this way, water can be prevented from entering from above.

[0035]

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 of the conventional example will be described with the same reference numerals.

As shown in the figure, the circulation side fan case 6
Has a plurality of outlets 6b at point-symmetrical positions, a heater 11 is provided near the outlets 6b, and the heaters 11 are arranged at point-symmetrical positions. A connector 17 for connecting the lead wire 16 of the motor 8 and the heater 11 is arranged at a position other than the position where the heater 11 is provided in the outer frame 1. Other configurations are the same as the conventional example.

With the above structure, a plurality of outlets 6b of the circulation side fan case 6 are provided at point symmetrical positions, and these outlets 6b are provided.
b By providing the heaters 11 close to each other, a large amount of heat energy can be supplied to the circulating air,
In addition, by providing a plurality of outlets 6b, the amount of circulating air can be increased, the drying time can be shortened and the clothes can be prevented from being damaged. Further, by disposing the heater 11 in a point symmetrical position, the circulating air passing through the air outlet 6b of the circulation side fan case 6 can be made uniform, and further,
By disposing the connector 17 for connecting the lead wire 16 of the motor 8 and the heater 11 at a position other than the position of the heater 11 in the outer frame 1, the entire structure can be made compact.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the drawing, the air outlet of the circulation side fan case 6 forms a curved wind tunnel with a partition plate 18, and the circulating air 5 of the heater 11 is introduced. Further, the heater 11 is arranged behind the partition plate 18 and the partition plate 18
If the two-bladed fan 3 is removed and the screw 19 is removed, the protrusion 2
It becomes detachable with 0 as the handle. A slope portion 21 having a substantially triangular cross section is formed in the streamline direction on the upstream side of the circulating air 5 of the circulation side fan case 6 with respect to the protrusion 20 of the partition plate 18.

With the above structure, when the heater 11 is clogged with dust or the like, the partition plate 18 can be easily removed for cleaning, and the circulation side fan case 6 can be circulated with respect to the projection 20 of the partition plate 18. The partition plate 18 is formed by the slope portion 21 having a substantially triangular cross section formed in the streamline direction in the upstream portion of the wind 5.
It is possible to reduce the wind noise caused by and to prevent the heat-exchanged condensed water from entering the heater 11.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in FIG. 5, the cooling side fan case 2
Reference numeral 2 is for introducing cooling air into the circulation side fan case 5 and exhausting it. The circulation side fan case 6 and the cooling side fan case 22 are welded and integrated, and as shown in FIG. Trough-shaped groove portions 23 are formed on the upper surface and the side surfaces. The gutter-shaped groove portion 23 is located substantially below the mating surface 24 between the outer frame 1 and the back plate 9.

With the above construction, when rainwater or the like is splashed from above the outer frame 1, the water that has entered from the mating surface 24 between the outer frame 1 and the back plate 9 will enter the circulation side fan case 6 and the cooling side fan case 22. Since it is welded and integrated, it can be discharged through the gutter-shaped groove portion 23 without entering the fan case, and it is possible to prevent it from entering the electric components such as the motor 8 and the connector 17. You can

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, the circulation fan case 6 has a mountain-shaped projection 25 above the drain port 15 for draining condensed water.
Are provided at a predetermined distance.

With the above structure, since the mountain-shaped protrusions 25 are provided above the drainage port 15 provided in the circulation side fan case 6 with a predetermined distance, the circulation wind from the drainage port 15 is provided by the protrusions 25. 5 can be prevented from leaking, the thermal efficiency can be improved, and the drying time can be shortened.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 9 and 10. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, the circulation side fan case 6
Is made of synthetic resin and has a substantially conical pin 26.
A plurality of pairs, and press the upper portion 26a of the pin 26 to make the gap 26b between the pins 26 smaller than the outer diameter of the lead wire 16,
The lead wire 16 is held.

With the above structure, the lead wire 16 can be easily held by the pin 26, and there is no risk of the lead wire 16 coming into contact with the double-blade fan 3 or the like, and safe lead wire processing can be performed.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. 11 and 12. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in the figure, the circulation side fan case 6
The lead wire 16 of the heater 11 below the outer seal 14.
The opening 27 for leading out is provided, and the opening 27 is closed by the closing member 28 formed of an elastic body. A recess 29 is formed in the closing member 28 so that the lead wire 16 can pass through.

With the above structure, the lead wire 16 of the heater 11 is led out from the opening 27 provided in the circulation side fan case 6, and the opening 27 is closed by the closing member 28 formed of an elastic body, whereby the opening 27 is formed. Can be completely closed, leakage of circulating air can be prevented, and drying performance and dehumidification performance can be improved.

Next, a seventh embodiment of the present invention will be described with reference to FIGS. 13 and 14. The same components as those in the first embodiment will be described with the same reference numerals.

As shown in FIG. 13, the lead wires 16 of the heater 11 are led out in a concentrated manner substantially above. In addition, FIG.
As shown in, the lead wires 16 of the heater 11 may be concentrated and led out substantially downward.

With the above configuration, the lead wire 1 of the heater 11
When 6 is concentrated and led out substantially upward, condensed water does not leak along the lead wire 16. When it is concentrated and led out substantially downward, water is prevented from entering from above. can do.

[0056]

As described above, according to the present invention, the air outlet of the circulation side fan case, the heater, the air outlet of the rotating drum, the air outlet of the baffle, the air inlet of the rotary drum, the air inlet of the air circulating side fan case, the air circulating side. The air flow in the circulation path of the air outlet of the fan case is formed airtightly, a plurality of air outlets of the circulation side fan case are provided, the heaters are arranged at point symmetrical positions, and the heaters other than the heater position in the outer frame are arranged. Since a connector for connecting the motor and the lead wire of the heater is provided at the position, a plurality of outlets of the circulation side fan case are provided at point symmetrical positions, and heaters are provided close to each of these outlets to improve heat Can supply a lot of energy to the circulating air,
By providing a plurality of outlets, the amount of circulating air can be increased, the drying time can be shortened and the clothes can be prevented from being damaged, and the heaters are arranged at point symmetrical positions to circulate the fan on the circulation side. The circulating air passing through the air outlet of the case can be made uniform, and a connector for connecting the motor and the lead wire of the heater is arranged at a position other than the heater position of the outer frame, thereby making the whole compact. be able to.

The outlet of the circulation side fan case is
A curved wind tunnel is formed by the partition plate to introduce the circulating air of the heater, and the heater is arranged behind the partition plate.
In addition, since the protrusion is made detachable as a handle, and a slope portion having a substantially triangular cross section is formed in the streamline direction in the upstream portion of the circulating air of the circulation side fan case with respect to the protrusion, the protrusion of the partition plate is The wind noise due to the partition plate can be reduced by the slope part with a substantially triangular cross section formed in the streamline direction in the upstream part of the circulation wind of the circulation side fan case, and the heat exchanged condensed water enters the heater part. Can be prevented.

Further, a cooling side fan case for introducing cooling air into the circulation side fan case and exhausting it is provided, and the cooling side fan case is welded to and integrated with the circulation side fan case, and a gutter-shaped groove is formed. Since the gutter-shaped groove is formed substantially below the mating surface between the outer frame and the back plate, when rainwater or the like is applied from above the outer frame, the mating surface between the outer frame and the back plate is formed. The more invaded water does not enter the fan case, but can be discharged through the trough-shaped groove portion, and it is possible to prevent the invaded electric components such as the motor and the connector.

Further, the circulation side fan case is provided with a drainage port for draining the condensed water, and the mountain-shaped protrusions are provided above the drainage port at a predetermined distance. Leakage can be prevented, thermal efficiency can be improved, and drying time can be shortened.

Further, the circulation side fan case is made of synthetic resin and is provided with a plurality of pairs of substantially conical pins. The upper part of the pins is pressed to make the interval between the pins narrower than the lead wire diameter, and the lead Since the wires are held, the lead wires can be easily held by a plurality of pairs of pins provided on the circulation side fan case, and safe lead wire processing can be performed.

Further, the circulation side fan case is provided with an opening under which the lead wire of the heater is led out below the outer seal, and the closing portion formed of an elastic body closes the opening. The opening provided in the case can be completely closed, the circulating air can be prevented from leaking, and the drying performance and dehumidification performance can be improved.

Further, since the lead wires of the heater are led out concentratedly either substantially above or below, when the lead wires of the heater are led out concentratedly substantially above, dew condensation water travels along the lead wires. It does not leak out, and when it is concentrated and led out substantially downward, water can be prevented from entering from above.

[Brief description of drawings]

FIG. 1 is a rear view of a clothes dryer according to a first embodiment of the present invention with a back plate removed, with a part thereof cut away.

FIG. 2 is a longitudinal sectional view of the clothes dryer.

FIG. 3 is a rear view of the clothes dryer according to the second embodiment of the present invention with the back plate removed.

FIG. 4 is an enlarged cross-sectional view of the main part of the clothes dryer.

FIG. 5 is an enlarged side sectional view of an essential part of a clothes dryer according to a third embodiment of the present invention.

FIG. 6 is a perspective view of the clothes dryer with a back plate removed.

FIG. 7 is an enlarged side sectional view of an essential part of a clothes dryer according to a fourth embodiment of the present invention.

FIG. 8 is an enlarged sectional view of a main part of the clothes dryer.

FIG. 9 is a perspective view of a circulation side fan case of a clothes dryer according to a fifth embodiment of the present invention.

FIG. 10 is an enlarged perspective view of a main part of a circulation side fan case of the clothes dryer.

FIG. 11 is a partially cutaway perspective view of a circulation side fan case of a clothes dryer according to a sixth embodiment of the present invention.

FIG. 12 is an exploded perspective view of essential parts of the clothes dryer.

FIG. 13 is a perspective view of essential parts showing a state of lead wires of an example of a clothes dryer according to a seventh embodiment of the present invention.

FIG. 14 is a perspective view of essential parts showing a state of lead wires of another example of the clothes dryer.

FIG. 15 is a vertical sectional view of a conventional clothes dryer.

[Explanation of symbols]

 1 Outer Frame 2 Rotating Drum 2a Intake Port 2b Blower Port 3 Double-Wing Fan 6 Circulation Side Fan Case 6a Intake Hole 6b Outlet Port 7 Shaft 8 Motor 11 Heater 12 Baffle 12a Wind Tunnel 12b Blower Hole 13 Inner Seal 14 Outer Seal 16 Lead Wire 17 connector

Claims (7)

[Claims] 1. A rotary drum, which is rotatably arranged in an outer frame, has an intake port provided at a substantially central portion of a rear surface thereof, and has a plurality of air blowing ports, and heat exchanges between circulating air and cooling air and has a blowing function. A double-blade fan having, and a shaft that pivotally supports the rotary drum at the rear and also axially supports the double-blade fan,
A circulation side fan case in which an air intake hole of the double-blade fan is provided in a substantially central portion and an air outlet is provided in a substantially outer peripheral portion, a heater provided in the vicinity of the air outlet of the circulation side fan case, and a blower for the rotating drum A baffle having a wind tunnel communicating with the mouth and a plurality of blowing holes and fixed to the outer peripheral portion of the rotating drum; and a substantially cylindrical inner seal fixed to the outer periphery of the intake hole provided in the substantially central portion of the circulation side fan case. A substantially cylindrical outer seal fixed to the outer circumference of the heater, and the air outlet of the circulation side fan case, the heater, the air outlet of the rotating drum, the air outlet of the baffle, the air inlet of the rotating drum, the circulation side fan case. The air flow in the circulation path of the air intake hole of the circulation side fan case and the air outlet of the circulation side fan case is airtightly formed, and a plurality of the air outlets of the circulation side fan case are provided and the heaters are arranged at point symmetrical positions, and the outer frame is provided. Inside the heater position Clothes dryer which is disposed a connector for connecting the motor and the lead wire of the heater at a position other than. 2. The air outlet of the circulation side fan case is constructed so that a curved wind tunnel is formed by a partition plate to introduce the circulating air of the heater, the heater is disposed behind the partition plate, and the protrusion is provided. 2. The clothes dryer according to claim 1, wherein the handle portion is detachably attached, and a slope portion having a substantially triangular cross section is formed in a streamline direction at an upstream portion of the circulating air of the circulation side fan case with respect to the protrusion. 3. A cooling-side fan case for introducing cooling air to the circulation-side fan case and exhausting the cooling-air is provided, the cooling-side fan case is welded to and integrated with the circulation-side fan case, and a gutter-shaped groove portion is provided. 2. The clothes dryer according to claim 1, wherein the gutter-shaped groove is formed so as to be located substantially below a mating surface between the outer frame and the back plate. 4. The clothes dryer according to claim 1, wherein the circulation side fan case has a drain port for draining the condensed water, and mountain-shaped projections are provided above the drain port at a predetermined distance. 5. The circulation side fan case is made of synthetic resin, and is provided with a plurality of pairs of substantially conical pins. The upper part of the pins is pressed to make the space between the pins narrower than the lead wire diameter. The clothes dryer according to claim 1, wherein the clothes dryer holds lines. 6. The circulation side fan case is provided with an opening for leading out the lead wire of the heater below the outer seal, and the closing member formed of an elastic body closes the opening. Clothes dryer. 7. The clothes dryer according to claim 1, wherein the lead wires of the heater are led out in a concentrated manner in either substantially upward or downward.