JPH05200A - Clothes dryer - Google Patents

Abstract

PURPOSE:To obtain a clothes dryer in which a drying air path is separated from a cooling air path by a both-sided fan and partition plate giving a sufficient space for the cooling air path to improve dehumidification rate. CONSTITUTION:On the outer peripheral part of a both-sided fan 17, a revolving grooves 22 of concentric circular arc-form is provided such that an opening thereof faces a drying air path 25, while on the inner peripheral part of a partition plate 28, a fixed grooves 30 of concentric circular arc-form such that an opening thereof faces a cooling air path 33. The said openings are fitted with each other with a smaller void between them. A rib height (h) of a fixed side peripheral rib 35 of the fixed grooves 30 is made lower than a rib height (H) of the most outer peripheral part 29 of the fixed grooves.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is equipped with a heat exchange type double-sided fan, circulates dry air in a drying chamber, and introduces and draws out external air as cooling air to separate the drying air and the cooling air. The present invention relates to a so-called dehumidification type clothes dryer in which heat is exchanged by the fan to remove moisture, and then the drying air is reheated by a heater and supplied to a drying chamber.

[0002]

2. Description of the Related Art An example of this type of clothes dryer is Japanese Examined Patent Publication No. 60.
It is disclosed in Japanese Patent Publication No. -56518. This dryer is
A wind tunnel is provided at the outlet of the rotary drum which is a drying chamber, an opening is provided at the rear of the wind tunnel, and a heat exchange type double-sided fan is provided with this opening as a partition. A sealing material is interposed between the outer peripheral edge of the double-sided fan and the opening edge of the wind tunnel, and separates a dry air passage on the front side of the fan and a cooling air passage on the rear side of the fan. That is, when the double-sided fan is rotated during the drying operation, the dry air is circulated to the drying chamber by the front surface of the double-sided fan, and the cooling air, which is the external air, is introduced and discharged so as to contact the rear surface of the double-sided fan. It Then, the fan itself exchanges heat between the drying air and the cooling air, the moisture is removed from the drying air, and the moisture is collected on the drying air passage side.

However, in this dryer, although the sealing material is inserted, the drying air passage and the cooling air passage may communicate with each other due to vibration of the rotating fan or small movement in the thrust direction. If the air leaks to the cooling air passage side and condenses, the condensed water cannot be collectively collected.
Also, if the dry air leaks out of the machine as it is, it will change the installation location to a high humidity environment.

Therefore, for example, the dryers described in JP-A-58-32998 and JP-A-58-57099 are
A gap having a curved path is formed between the outer peripheral edge of the heat exchange type double-sided fan and the partition plate facing the outer peripheral edge to enhance the sealing effect. Also, JP-A-61-284300
In the one disclosed in the publication, a labyrinth connection is provided between the fan and the partition plate so that the rotational force of the fan does not decrease due to the frictional force at the time of sealing.

[0005]

DISCLOSURE OF THE INVENTION In the present invention, when using the labyrinth joint having a relatively good sealing effect as described above, a sufficient air passage space on the cooling air passage side is ensured and the dehumidification rate is increased. It is an object of the present invention to obtain an improved clothes dryer.

[0006]

The solution according to the present invention is provided with a concentric arc-shaped rotary groove group on the outer peripheral portion of a double-sided fan so that its opening faces the dry air passage side, and the inner peripheral portion of the partition plate. Is provided with a concentric arc-shaped fixed groove group so that the opening faces the cooling air passage side, and the openings of the rotary groove group and the fixed groove group are loosely fitted to each other with a small gap therebetween, and the fixed groove group is formed. The rib height of the fixed side peripheral rib is set to be lower than the rib height of the outermost peripheral portion of the fixed groove group.

[0007]

Since the rib height of the fixed side peripheral rib of the fixed groove group is made lower than the rib height of the outermost peripheral portion of the fixed groove group, the bottom surface of the rotary groove group is the outermost peripheral portion of the fixed groove group. With the group of rotation grooves inserted so as to be located substantially flush with the opening edge of the, and the labyrinth connection is formed by loosely fitting in a non-contact state with each other, the double-sided fan projects toward the cooling air passage side, and the cooling air passage Without narrowing the cooling air passage by narrowing the outermost peripheral portion of the fixed groove group and narrowing the cooling air passage.
It is possible to secure a sufficient amount of cooling air to pass through the cooling air passage, thereby improving the dehumidification rate. Further, since a sufficient air passage space can be secured between the double-sided fan and the rear plate, even if the double-sided fan warps toward the cooling air passage due to the temperature increase on the drying air passage side during the drying operation, it will contact the rear surface plate. In addition, since the air passage is not narrowed and the cooling air volume does not decrease, the dehumidification rate does not decrease.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Explaining with reference to the drawings, a machine frame 1 of a clothes dryer has a front plate 2 at a front opening and a rear plate 3 at a rear opening.
They are fastened to each other. The front plate 2 is provided with a clothing entrance / exit 4 and is opened and closed by a door 5. The back plate 3 is
A cooling air inlet 6 which is external air is provided in the central portion, and an outlet 7 is provided in the lower portion. In the vicinity of the clothes entrance / exit 4, a metal annular drum support plate 8 is fixedly attached so as to surround the entrance / exit, and in the machine frame 1 spaced from the rear face plate 3,
A horizontally elongated support plate 9 made of metal is tried on. The drum support board 8 and the support plate 9 are fixed to the machine frame 1.

A support shaft 10 is horizontally suspended between the central portions of the rear plate 3 and the support plate 9 and fixed to the rear plate 3 with bolts.

A horizontal shaft type rotary drum 11 which is a drying chamber for accommodating clothes, stirring and drying them, has a front opening opposed to the clothes inlet / outlet 4 and is rotatably supported by a drum support plate 8 via felt or the like. The rear end surface is rotatably supported by the support shaft 10 having the support plate 9 inserted therein through bearings. A dry air outlet 12 is provided at the center of the rear end surface, and a lint filter 13 is detachably attached to the outlet 12. The inlet 14 for the dry air is provided in the drum supporting board 8.

The vent hole 1 is formed in the support plate 9 facing the outlet 12.
5 is formed, and in order to hermetically seal the passage between the outlet 12 and the vent 15, a seal member 16 which is in sliding contact with the support plate 9 is fixed to the rear end surface of the drum 11.

A heat exchange type double-sided fan 17 is rotatably attached to a spindle 10 between the rear plate 3 and the support plate 9 via a bearing. The double-sided fan 17 has blades formed in a radial shape from the rotating cylinder portion 18 at the center to the outer peripheral portion 19 having an annular shape. Further, on the outer peripheral portion 19, a rotary groove group 22 composed of three concentric arc-shaped rotary grooves which also serves as the outer peripheral portion is formed in the outer peripheral direction. The rotation groove group 22 has its opening facing the support plate 9 side.
In the double-sided fan 17, the rotary cylinder portion 18, the outer peripheral portion 19, the respective fan surfaces 20, 21, and the rotary groove group 22 are integrally molded with resin.

A motor 23 is arranged at the lower right corner of the machine frame 1, and the rotary drum 11 is rotated at a low speed by a pulley belt, and the double-sided fan 17 is driven by a pulley belt 24. Rotate at high speed. The rotation direction is clockwise (clockwise) when viewed from the front.

The support plate 9 is provided with a circulating dry air passage 25 located at the lower left corner of the machine frame 1. This wind path 25
Is an outlet 12, a ventilation port 15, and a circulating fan surface 20 to reach the inlet 14. A condensed water discharge port 26 is provided on the way, and a heater composed of a positive temperature coefficient thermistor is provided in the vicinity of the inlet 14.
Is installed.

A partition plate 28 is provided to cover and partition the outer periphery of the double-sided fan 17 in the dry air passage 25, and an annular inner peripheral portion 29 thereof faces the rotary groove group 22. In the inner peripheral portion 29, a fixed groove group 30 composed of three concentric arc-shaped fixed grooves which also serves as the inner peripheral portion is formed toward the center. Then, the rib height h in the direction from the bottom of the fixed-side circumferential rib 35, which constitutes the portion of the fixed groove group 30 excluding the inner peripheral portion 29, which is the outermost peripheral portion, toward the rear face plate 3.
Is the inner peripheral portion 2 that constitutes the outermost peripheral portion of the fixed groove group 30.
It is formed so as to be lower than the rib height H in the direction from the bottom portion of 9 to the rear plate 3.

This fixed groove group 30 has its opening at the rear face plate 3.
The bottom surface of the rotary groove group 22 is directed toward the fixed groove group 3
In a state in which the rotary groove group 22 is inserted so as to be positioned substantially flush with the opening edge of the inner peripheral portion 29 forming the outermost peripheral portion of 0,
Moreover, they are loosely fitted in the rotation groove group 22 in a non-contact state with each other. That is, the rotary groove group 22 and the fixed groove group 30 form a labyrinth connection.

The fixed groove group 30 is integrally formed with three bulging portions 31 ... At its bottom, that is, on the dry air duct 25 side. The bulging portions 31 are arranged at the lowermost position of the fixed groove group 30, at a position where the rotation angle deviates from the lowermost position by about 330 degrees in the rotational direction, and at a position also deviated by about 300 degrees. Yes, it is inclined so that the bulge gradually increases in the direction of rotation. The inside of the bulging part 31 is communicated with each groove individually, and a communication port 32 is formed for each groove at the maximum inclined end, that is, at the downstream end when dry air flows. There is. This communication port 32 ...
Will be connected to.

Thus, the dry air passage 25 and the cooling air passage 33 are divided by the double-sided fan 17 and the partition plate 28.

During the drying operation, the motor 23 and the heater 27 are operated to rotate the rotary drum 11 at a low speed and the double-sided fan 17 at a high speed in the right direction (clockwise direction). The dry air circulates through the dry air passage 25, and the cooling air enters and leaves the cooling air passage 33. The dry air that heats the clothes and contains moisture is cooled by the double-sided fan 17 to condense the moisture. Condensed water flows down on the dry air duct 25 side and is discharged from the outlet 26.
Is discharged from the outside.

The dry air passage 25 and the cooling air passage 33 are sealed by a labyrinth connection, and the dry air flows in the dry air passage 25 along the inclination of the bulging portions 31. The swelling portions 31 ... Narrow the dry air passage 25 here, partially increase the wind speed of the dry air by Bernoulli's theorem, and make the dry air passage 25 side have a low pressure across the communication port 32. The air in each groove of the fixed groove group 30 is passed through the communication port 32 ...
I am trying to flow to. That is, leakage of the dry air from the dry air passage 25 to the cooling air passage 33 is suppressed by breaking the pressure balance.

Further, a fixed groove group 30 is provided between the partition plate 28 and the double-sided fan 17, and a rib height h in the direction from the bottom of the fixed side peripheral rib 35 constituting the fixed groove group 30 to the rear face plate 3. The rib height H in the direction from the bottom of the inner peripheral portion 29 forming the outermost peripheral portion of the fixed groove group 30 toward the rear face plate 3.
By forming it to be lower than the rotation groove group 2
The rotating groove group 22 is inserted so that the bottom surface of the second groove is substantially flush with the opening edge of the inner peripheral portion 29 forming the outermost peripheral portion of the fixed groove group 30, and the rotating groove group 22 is not contacted with each other. Since it is fitted to form a labyrinth connection, the cooling air passage 33
The double-sided fan 17 does not project to the side to narrow the cooling air passage 33, and the inner peripheral portion 29 does not project to narrow the cooling air passage 33, so that a sufficient air passage space can be secured. Since the air volume of the cooling air passing through the cooling air passage 33 can be sufficiently secured, the dehumidification rate is improved. Further, since a sufficient air passage space can be secured between the double-sided fan 17 and the rear plate 3, the double-sided fan 17 warps toward the cooling air passage 33 side due to the temperature increase on the drying air passage 25 side during the drying operation. Back plate 3
Since it does not come into contact with, and the air passage is not narrowed to reduce the cooling air volume, the dehumidification rate does not decrease.

The condensed water generated by the heat exchange action between the rotary groove group 22 and the fixed groove group 30 flows out from the respective communication ports 32 ... The amount of outflow air or pressure from the communication ports 32 ... Is adjusted by changing the degree of bulging of the bulging portions 31.

In this way, the dehumidifying action by the heat exchange of the dry air is sufficiently and surely executed so that the leak of the dry air is small, and the air volume of the cooling air passing through the cooling air passage 33 can be always secured sufficiently. Therefore, the dehumidification rate increases.

The fixed groove group 3 is provided on one bulge 31 at the bottom.
It is also possible to provide a vent hole that communicates each groove of No. 0 from the up and down direction, and to cause the condensed water generated in the groove to flow down along the inner surface of the groove regardless of the wind force and to be guided to the dry air duct 25 side. Further, the number of the bulged portions 31 ... Can be determined as necessary.

In this embodiment, since the drying air passage 25 is located in the lower left corner of the machine frame 1 and the rotation direction of the fan 17 is the right direction (clockwise direction), a large amount of the drying air can be obtained. The bulged portions 31 ... Are scattered along the tangent line facing the passage 25 to increase the air flow output from the communication ports 32.

In this embodiment, the outer peripheral portion 1 of the double-sided fan 17 is used.
By making 9 an annular shape, the strength of the entire fan during blade formation and heating is maintained, and this outer peripheral portion 19 is formed in the rotary groove group 2
It is used for part of 2. A vertical rib 34 is integrally formed from the tip of the innermost portion of the fixed groove group 30 of the partition plate 28 toward the outer peripheral portion 19 with high dimensional accuracy. The vertical rib 34 is orthogonal to the depth direction of the groove and narrows the space between the vertical rib 34 and the outer peripheral portion 19 to prevent the condensed water from leaking from the dry air duct 25 side. Also, when condensed water enters, surface tension is generated between the narrow intervals of the outer peripheral portion 19 to enhance the sealing effect. The vertical rib 34 may be formed not only at the tip but also in the middle thereof, but it must be adjusted in accordance with the dimensional accuracy as the strength of the outer peripheral portion 19 is improved.

In this embodiment, the outer peripheral portion 1 of the double-sided fan 17 is used.
By making 9 an annular shape, the strength of the entire fan at the time of blade formation is maintained, and this outer peripheral portion 19 is used as a part of the rotary groove group 22.

Further, in the present embodiment, a sufficient air passage space can be secured between the double-sided fan 17 and the rear plate 3, so that the temperature of the double-sided fan 17 increases during the drying operation due to the temperature increase on the dry air passage 25 side. Even if the cooling air passage 33 warps, it does not come into contact with the rear surface plate 3 and the air passage is not narrowed to reduce the cooling air volume, so that the dehumidification rate does not decrease. Therefore, it is possible to design the cooling air passage 33 with almost no reduction in the air passage space due to the warp of the double-sided fan, and as a result, it is possible to obtain a clothes dryer capable of reducing the thickness of the cooling air passage portion.

[0029]

The present invention is constructed as described above, and when partitioning the dry air passage and the cooling air passage, which are formed on the front and back sides of the double-sided fan, inside the rotary groove group and the partition plate on the outer peripheral portion of the double-sided fan. The labyrinth connection is configured by loosely fitting the fixed groove group of the peripheral portion to each other, and moreover, the rib height of the fixed side peripheral rib of the fixed groove group is
Since the rib height is lower than the outermost peripheral portion of the fixed groove group, the double-sided fan does not project toward the cooling air passage side to narrow the cooling air passage, and the outermost peripheral portion of the fixed groove group protrudes to cool the cooling air. It is possible to secure a sufficient air passage space without narrowing the passage, and thus, it is possible to sufficiently secure the air volume of the cooling air passing through the cooling air passage, thereby improving the dehumidification rate. Also,
Since a sufficient air passage space can be secured in the cooling air passage on the back of the double-sided fan, even if the double-sided fan warps toward the cooling air passage due to the temperature increase on the drying air passage side during the drying operation, it may come into contact with other parts. Also, since the air passage is not narrowed and the cooling air volume does not decrease, the dehumidification rate does not decrease. Therefore, it is possible to obtain a clothes dryer having a high dehumidification rate, in which the cooling air passage portion can be made thin.

[Brief description of drawings]

FIG. 1 is an enlarged side sectional view of a main part of an embodiment of a clothes dryer of the present invention.

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

FIG. 3 is a rear view with the rear face plate removed.

FIG. 4 is a rear view with the rear plate and the double-sided fan removed.

FIG. 5 is a sectional view based on the line AA in FIG.

FIG. 6 is a perspective view of the main part.

[Explanation of symbols]

 11 Rotating Drum (Drying Room) 17 Double-sided Fan 19 Peripheral Part 20 Circulating Fan Surface 21 Cooling Fan Surface 22 Rotating Groove Group 25 Dry Air Path 28 Partition Plate 29 Inner Circumferential Part (Outermost Part of Fixed Groove Group) 30 Fixed Groove Group 33 Cooling air passage 35 Fixed side peripheral rib

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location F04D 17/08 8914-3H 29/28 H 7314-3H F26B 11/04 9140-3L 21/04 C 9140-3L F28F 3/02 9141-3L (72) Inventor Yoshiaki Aoki 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Kiyokazu Fujikawa 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Address Sanyo Electric Co., Ltd. (72) Inventor Koichi Tanaka 2-18 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A drying chamber for accommodating and drying clothes, a circulating fan surface for circulating drying air and a cooling fan surface for introducing and discharging cooling air to and from the drying chamber. Both sides have a heat exchange type double-sided fan that exchanges heat between the circulating dry air and the introduced cooling air, and an inner peripheral part facing the outer peripheral part of this double-sided fan. A partition plate for partitioning the passage and the cooling air passage, and a concentric arc-shaped rotating groove group is provided on the outer peripheral portion of the double-sided fan so that its opening faces the dry air passage side, and the inner peripheral portion of the partition plate. Is provided with a concentric arc-shaped fixed groove group so that the openings thereof face the cooling air passage side, and the openings of the rotary groove groups are loosely fitted to each other with a small gap between them, and the fixed side circumference of the fixed groove group is The rib height of the rib is the rib height of the outermost peripheral part of the fixed groove group. Remote clothes dryer, characterized by low.