JP3508255B2 - 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 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. The configuration will be described below.

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. The motor 8 rotationally drives the rotary drum 2 and the double-sided fan 3. The back plate 9 covers the rear surface of the outer frame 1 and is an intake / exhaust port 9x for taking in the cooling air 4.
Is provided.

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 thereof,
b is provided on the substantially outer peripheral portion.

The cooling fan case 10 is formed by the flange 6c extending on the circulation fan case 6 and the back plate 9.
Is formed. The heater 11 is the circulation side fan case 6
It is provided close to the air outlet 6b. The rotary drum 2 is provided with an intake port 2a in the substantially central portion of the rear surface and a plurality of blower ports 2b in the outer peripheral portion so as to face the heater 11.

The wind tunnel 1 communicating with the air outlet 2b
A baffle 12 having 2a and a plurality of ventilation holes 12b is fixed to the outer peripheral portion of the rotary drum 2. Further, a substantially cylindrical inner seal 13 is provided on the outer circumference of the intake hole 6a of the circulation side fan case 6, and a substantially cylindrical outer seal 14 is provided on the outer circumference of the heater 11 to hermetically seal the intake hole 6a and the air outlet 6b. It is separated into

In the above structure, when the motor 8 rotates, the rotary drum 2 and the double-sided fan 3 also 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 seals 14 and reaches the ventilation hole 12b from the wind tunnel 12a of the baffle 12 via the ventilation port 2b of the rotary drum 2 and 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 air 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.

[0008]

In such a conventional configuration, the outlet 6b of the circulation side fan case 6 has a partition plate 6e.
The curved wind tunnel is formed by the above, and the circulating wind 5 is introduced, but the partition plate 6e cannot be removed from the rear,
The cleaning of dust behind the heater 11 must be performed by separating the circulation side fan case 6 and the rotating drum 2, and there is a problem that it takes a very long time to work. When the heater 11 is arranged substantially above the circulation side fan case 6,
Condensation water was accumulated below the partition plate 6e, and there was a risk of insulation deterioration of the heater 11.

Further, the inner seal 13 and the outer seal 14 are fixed to the circulation fan case 6 made of resin. The temperature becomes high during operation, the thermal expansion of the resin deteriorates the sealability of both seals, and the drying time is long. There was a problem that the dehumidification performance deteriorates. Further, since the resin circulation side fan case 6 causes thermal deformation in the vicinity of the heater 11, there is a problem that desired performance cannot be ensured.

Further, the shaft 7 supports the double-blade fan 3 in the rear, but the rear of the double-blade fan 3 is a free end, and therefore the shaft 7 may be inclined due to the tension of the fan belt 16 for driving the double-blade fan 3. was there. Further, when the fan belt 16 is hung on the motor pulley 17, there is a problem that the workability is extremely poor because there is no place to hang it.

Further, since the inner seal 13 and the outer seal 14 are made of a non-woven fabric, there is a problem that the eccentricity of the rotary drum 2 deteriorates the sealing property and the drying and dehumidifying performance.

Further, depending on the surface runout of the rotary drum 2, a gap is created in the front and rear direction of the inner seal 13 and the outer seal 14, and similarly to the above, the circulating air 5 leaks and the drying and dehumidifying performance deteriorates. It was

Further, since the upper portion of the circulation side fan case 6 is located at the joint portion between the outer frame 1 and the back plate 9, when the dryer is installed outdoors, rainwater enters from the joint portion and the circulation side. There is a problem that it reaches the rotary drum 2 side from the upper part of the fan case 6 and is scattered to the outer periphery by the rotation, rainwater adheres to electric components such as the motor 8 and causes insulation deterioration.

SUMMARY OF THE INVENTION The first object of the present invention is to solve the above-mentioned problems and to make it possible to clean the heater easily and in a short time, and to secure the safety of the heater section.

A second object is to prevent thermal deformation of the resin circulation side fan case, to secure the sealing performance of the inner and outer seals, and to secure the drying performance.

In addition, it is possible to prevent the performance from deteriorating due to the inclination of the double-blade fan by supporting the shaft on both sides.
The purpose is.

A fourth object is to prevent the damage of the fan belt during assembly by temporarily attaching the fan belt and improve serviceability.

A fifth object is to maintain and improve the sealability of the inner seal and the outer seal.

A sixth object is to maintain and improve the sealing performance of the inner seal and the outer seal in the thrust direction.

A seventh object is to prevent rainwater from entering between the outer frame and the back plate and being scattered on the outer peripheral portion when the drum is rotated to cause insulation deterioration.

[0021]

In order to achieve the first object, the present invention has a structure in which the air outlet of the circulation side fan case forms a curved wind tunnel from a partition plate to introduce the circulation air into the heater. A first problem solving means is to dispose a heater behind the partition plate, to make the partition plate detachable, and to form a tongue portion serving as a drainage hole and a handle below the partition plate. .

Further, in order to achieve the second object, a fan-shaped fan case mounting plate having a substantially donut shape is used as a heat shield plate between the inner seal and the outer seal which enclose the heater, and the vortex chamber wall and the rib of the circulation side fan case. The second space means is fixed with a space provided.

Further, in order to achieve the third object, as a third means for solving the problem, a fan contact plate for supporting the shaft at a substantially central portion is fixed to the circulation fan case behind both the blade fans of the shaft. There is.

In order to achieve the fourth object, the circulation side fan case is provided with a plurality of pins for hooking a fan belt for driving a double-blade fan from a motor.
Is used as a means for solving the problem.

In order to achieve the fifth object, a fifth aspect of the present invention is to attach a pressing ring formed of a coil spring to the outer periphery of at least one of the inner seal and the outer seal so as to abut.

Further, in order to achieve the sixth object, a thrust seal is provided in the inner space of at least one of the inner seal and the outer seal in the front-rear space of the drum rear surface and the circulation side fan case. Is used as a means for solving the problem.

In order to achieve the seventh object, a water intrusion prevention weir higher than the outer shell of the circulation side fan case is provided substantially above the circulation side fan case in front of the combined portion of the outer frame and the back plate. The provision is provided as a means for solving the seventh problem.

[0028]

According to the present invention, since the partition plate is detachable from the rear by the first means for solving the problem, the heater can be cleaned easily and in a short time, and the safety of the heater section can be secured. Since the tongue part that doubles as a drain hole and a handle is formed below the plate, the condensed water that has adhered to the vicinity of the partition plate does not collect and does not reach the heater, ensuring the insulation of the heater. it can.

Further, according to the second means for solving the problems, the thermal deformation of the circulation side fan case made of resin can be prevented by the fan case mounting plate which is a blocking plate and the space, and the inner seal and the outer seal are sealed. The property can be permanently secured, and the desired dry and dehumidifying performance can be secured.

Further, according to the third means for solving the problems, the double-blade fan is supported by the fan contact plate on both sides, and the shaft is not tilted by the tension of the fan belt for driving the double-blade fan, and the stable rotation of the double-blade fan is obtained. The drying and dehumidifying performance can be stabilized.

Further, according to the fourth problem-solving means, the fan belt can be temporarily fixed to the pin at the time of assembling, and the fan belt can be prevented from being pinched and scratched with other parts, and assembling with high quality can be realized. In addition, it is possible to improve serviceability as well.

Further, according to the fifth means for solving the problems, the inner seal or the outer seal is uniformly pressed by the pressing ring, the sealing property can be secured even if the rotary drum is eccentric, and the dry and dehumidifying performance can be maintained.

Further, according to the sixth means for solving problems, even if a gap is generated in the front-back direction of the inner seal and the outer seal due to the surface runout of the rotary drum, the sealing performance can be secured by the thrust seal and the dry dehumidification performance is maintained. be able to.

Further, by the seventh means for solving the problem, even if rainwater enters from the space between the outer frame and the back plate, it does not reach the rotating drum and the water is not scattered and safety can be secured.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. The same components as those of the conventional example will be described with the same reference numerals.

As shown in the figure, the outlet 6b of the circulation side fan case 6 forms a curved wind tunnel with a partition plate 18,
The circulating air 5 is introduced into the heater 11. As shown in FIG. 2, the partition plate 18 is detachable from the rear side, and has a handle portion (tongue portion) 18a for improving workability. The handle portion 18a is formed in a convex portion by bending backward.

Therefore, as shown in FIG. 3, the partition plate 1
Condensed water adhering to the vicinity of 8 returns to the double-blade fan 3 side without accumulating in the α portion, and the water accumulation α is due to the heater 1
Therefore, the insulation of the heater 11 can be secured without reaching 1. In this way, the handle portion 18a of the partition plate 18 can also have the function of a drainage hole.

Next, a second embodiment will be described with reference to FIGS. 1, 3 and 4. As shown in the figure, the inner seal 13 and the outer seal 14 are fixed to the circulation side fan case 6 made of resin, and the inner seal 13 and the outer seal 1
The fan case mounting plate 19 having a substantially donut shape is fixed to the circulation side fan case 6 as a heat shield plate between the four. Inner seal 13 and outer seal 1 by fan case mounting plate 19
4 is sandwiched and fixed. Then, the circulation side fan 6 is provided with ribs 6f in order to form a space β.

With the above configuration, the thermal deformation of the circulation side fan case 6 made of resin can be prevented by the fan case mounting plate 19 which is a blocking plate and the space β, and the sealing properties of the inner seal 13 and the outer seal 14 can be prevented. Can be secured permanently.

Next, a third embodiment of the present invention will be described with reference to FIGS. 1, 3, 4 and 5.

As shown in the figure, behind the double-blade fan 3 on the shaft 7, there is provided a hole 20a in a substantially central portion for supporting the shaft 7.
The fan contact plate 20 having a substantially vertical shape is fixed to the circulation side fan case 6.

With the above structure, the double-blade fan 3 is supported by the fan contact plate 20 on both sides, and the shaft 7 is not tilted by the tension of the fan belt 16 that drives the double-blade fan 3, so that the double-blade fan 3 can rotate stably. The obtained dry dehumidification performance can be stabilized. Also, the fan contact plate 2
Since 0 is fixed to the circulation side fan case 6, the above effect can be obtained without being affected by the outer frame 1. That is,
Even if the outer frame 1 is slightly deformed during assembly or transportation,
The shaft 7 can be stably rotated without being affected.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 1 and 5. As shown in the figure, a pin 6 for hooking a fan belt 16 that drives the double-wing fan 3
g is provided on the cooling side of the circulation side fan case 6.

With the above structure, the fan belt 1 is assembled at the time of assembly.
As shown in FIG. 5, it is possible to temporarily fix 6 to the pin 6g so that it is not pinched and scratched with other parts, and assembling with excellent quality becomes possible. In addition, it is possible to improve serviceability as well.

Next, a fifth embodiment will be described with reference to FIGS. 1, 6 and 7.
The description will be made with reference to FIG.

As shown in the drawing, a pressure ring 21 formed of a coil spring is abutted and attached to the outside of at least one of the inner seal 13 and the outer seal 14. The hooks 21a and 2 provided at the tip of the pressing ring 21 are attached.
A ring is formed by hooking 1b on each other.

With the above-mentioned structure, the inner seal 13 or the outer seal 14 is, as shown in FIG.
Thus, even if the rotating drum 2 is eccentrically pressed by the force f, the sealing property can be secured and the dry and dehumidifying performance can be maintained.

Next, a sixth embodiment will be described with reference to FIGS. 1 and 3. Inner seal 1 as shown
3, a space 22 in the front-rear direction of the drum rear surface 2c and the circulation side fan case 6 on the inner peripheral portion of at least one of the outer seals 14
Is provided with a thrust seal 23. The thrust seal 23 may be attached to either the rotary drum 2 or the circulation side fan case 6.

With the above structure, even if a gap is created in the front-rear direction between the inner seal 13 and the outer seal 14 due to the surface runout of the rotary drum 2, the thrust seal 23 can ensure the sealing performance and maintain the dry and dehumidifying performance. it can.

Next, a seventh embodiment of the present invention will be described with reference to FIGS. 1, 3, 4 and 5.

As shown in the figure, the upper portion of the circulation side fan case 6 is located at the mating portion 24 of the outer frame 1 and the back plate 9. A rib 6i is provided on the outer shell 6h of the circulation side fan case 6 in front of the mating portion 24.

With this configuration, even if rainwater enters from between the outer frame 1 and the back plate 9, it does not reach the rotating drum 2 and the safety can be secured without the water splashing.

[0053]

As described above, according to the present invention, the air outlet of the circulation side fan case has a structure in which a curved wind tunnel is formed from the partition plate to introduce the circulating air to the heater, and the heater is arranged behind the partition plate. However, since this partition plate is removable and a tongue part that doubles as a drain hole and a handle is formed below the partition plate, cleaning of the heater can be done easily and in a short time, and the safety of the heater part is improved. Since the tongue that doubles as a drain hole and a handle is formed below the partition plate, the condensed water adhering to the vicinity of the partition plate does not collect and does not reach the heater. Insulation can be secured.

Further, between the inner seal and the outer seal containing the heater, a substantially donut-shaped fan case mounting plate is fixed as a heat shield plate by providing a space between the vortex chamber wall of the circulation side fan case and the ribs. It is possible to prevent thermal deformation of the circulation side fan case formed by the fan case mounting plate, which is a blocking plate, and the space, and it is possible to permanently secure the sealability of the inner seal and the outer seal. Dehumidifying performance can be secured.

Further, since the fan contact plate supporting the shaft at the substantially central portion is fixed to the circulating fan case behind the both-wing fan of the shaft, the both-wing fan is supported by both sides by the fan contact plate to drive the both-wing fan. The shaft does not tilt due to the tension of the fan belt, stable rotation of the double-blade fan is obtained, and the drying and dehumidifying performance can be stabilized.

Further, since the circulation fan case is provided with a plurality of pins for hooking the fan belt for driving the two-blade fan from the motor, the fan belt can be temporarily fixed to the pins during assembly and can be sandwiched between other parts. It will not be damaged and it will be possible to assemble with excellent quality. In addition, it is possible to improve serviceability as well.

Further, since the pressing ring formed of the coil spring is attached to the outer periphery of at least one of the inner seal and the outer seal so as to be in contact with each other, the inner seal or the outer seal is uniformly pressed by the pressing ring, and the rotating drum is eccentric. The sealing property can be secured and the dry and dehumidifying performance can be maintained.

Further, since the thrust seal is arranged in the inner space of at least one of the inner seal and the outer seal in the space in the front-rear direction of the drum rear surface and the circulation side fan case, the surface seal of the rotating drum causes the inner seal and the outer seal to be separated. Even if a gap is formed in the front-rear direction, the sealing performance can be secured by the thrust seal and the dry and dehumidifying performance can be maintained.

Further, since a water intrusion prevention weir higher than the outer shell of the circulation side fan case is provided in the upper part of the circulation side fan case in front of the combined portion of the outer frame and the back plate, between the outer frame and the back plate. Even if rainwater enters, the safety does not reach the rotating drum and the water does not scatter.

[Brief description of drawings]

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

FIG. 2 is a rear view of the clothes dryer with a back plate removed.

FIG. 3 is an enlarged sectional view of a main part of the clothes dryer.

FIG. 4 is an exploded perspective view of a circulation side fan case of the clothes dryer according to the second embodiment of the present invention.

FIG. 5 is a rear view of the clothes dryer according to the third embodiment of the present invention with the back plate removed.

FIG. 6 is a perspective view of an inner seal of a clothes dryer according to a fifth embodiment of the present invention.

FIG. 7 is a sectional view of an inner seal of the clothes dryer.

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

FIG. 9 is a vertical sectional view of a conventional clothes dryer.

[Explanation of symbols]

1 outer frame 2 rotating drums 2a intake port 2b Blower Three-sided fan 6 Circulation side fan case 6a Intake hole 6b outlet 7 shaft 9 Back plate 9x intake and exhaust 11 heater 12 baffles 12a wind tunnel 12b ventilation hole 13 Inner seal 14 outer seal 18 dividers 18a tongue

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiko Ota 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Hisaya Matsui 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-5-15696 (JP, A) JP-A-1-175897 (JP, A) JP-A-6-134189 (JP, A) JP-A-60-5200 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) D06F 58/02

Claims (7)

(57) [Claims] 1. A rotary drum which is rotatably disposed in an outer frame and has an intake port provided at a substantially central portion of a rear surface thereof and a plurality of blow ports, and a plurality of wind tunnels communicating with the blow ports of the rotary drum. Baffle fixed to the outer peripheral portion of the rotary drum with a blower hole, a double-blade fan for exchanging heat between the circulating air and the cooling air, and a blower function, and a rotary support for the rotary drum at the rear and a shaft for the double-blade fan. A supporting shaft, a circulation side fan case in which the air intake holes of the two-bladed fans are provided in a substantially central portion and an air outlet in a substantially outer peripheral portion, and a cooling side fan case having an intake / exhaust port together with the circulation side fan case. A back plate, a heater as a heat source provided in the vicinity of the outlet of the circulation side fan case, and a substantially cylindrical inner side fixed to the outer periphery of an intake hole provided at the substantially central portion of the circulation side fan case Seal and the A substantially cylindrical outer seal fixed to the outer circumference of the rotor, 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 flow in the circulation path of the intake port of the rotating drum, the intake hole of the circulation side fan case, and the air outlet of the circulation side fan case is airtightly formed, and the air outlet of the circulation side fan case is curved from the partition plate. Is formed to introduce circulating air to the heater, a heater is disposed behind the partition plate, the partition plate is detachable, and the tongue also serves as a drainage hole and a handle below the partition plate. Clothes dryer that forms a part. 2. A substantially donut-shaped fan case mounting plate is used as a heat shield plate between the inner seal and the outer seal enclosing the heater, and a space is provided between the vortex chamber wall of the circulation side fan case and the ribs. The described clothes dryer. 3. The clothes dryer according to claim 1, wherein a fan contact plate for supporting the shaft at a substantially central portion is fixed to a circulation fan case at the rear of the both-wing fan of the shaft. 4. The clothes dryer according to claim 1, wherein the circulation side fan case is provided with a plurality of pins for hooking a fan belt for driving a double-blade fan from a motor. 5. The clothes dryer according to claim 1, wherein a pressing ring formed of a coil spring is abutted on and attached to the outer periphery of at least one of the inner seal and the outer seal. 6. The clothes dryer according to claim 1, wherein a thrust seal is provided in the inner space of at least one of the inner seal and the outer seal in a space in the front-rear direction of the drum rear surface and the circulation side fan case. 7. The clothes drying machine according to claim 1, wherein a water intrusion prevention dam higher than the outer shell of the circulation side fan case is provided substantially in the upper part of the circulation side fan case in front of the combined portion of the outer frame and the back plate. Machine.