CN106894210B

CN106894210B - Clothes dryer

Info

Publication number: CN106894210B
Application number: CN201510945922.4A
Authority: CN
Inventors: 匡慧; 哈尔德·莫旭茨; 约艮·海斯
Original assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2015-12-17
Filing date: 2015-12-17
Publication date: 2020-07-10
Anticipated expiration: 2035-12-17
Also published as: CN106894210A

Abstract

A clothes dryer comprises an inner barrel and an outer barrel sleeved outside the inner barrel, wherein a gap is formed between the inner barrel and the outer barrel, the inner barrel is provided with a barrel-shaped side wall, a plurality of through holes are distributed on the barrel-shaped side wall, an inner barrel opening is formed in one axial side of the inner barrel, an outer barrel opening is formed in the same direction of the outer barrel and the inner barrel, a circle of gap opening is formed between the outer barrel opening and the inner barrel opening, a hot air inlet is arranged close to the outer barrel opening, an air outlet is arranged at the rear part of the outer barrel opposite to the outer barrel opening, hot air is driven by a fan to enter the outer barrel from the hot air inlet, the hot air inlet is provided. The air entering the gap from the through hole of the roller continuously and repeatedly enters the inner barrel to participate in the evaporation of the moisture under the dragging action of the airflow sprayed by the spray head instead of being directly discharged from the air outlet. Therefore, the drying efficiency of the clothes dryer can be obviously improved.

Description

Clothes dryer

[ technical field ] A method for producing a semiconductor device

The invention relates to a clothes dryer, comprising an inner barrel and an outer barrel sleeved outside the inner barrel, wherein a gap is arranged between the inner barrel and the outer barrel, the inner barrel is provided with a barrel-shaped side wall, a plurality of through holes are distributed on the barrel-shaped side wall, one axial side of the inner barrel is provided with an inner barrel opening, an outer barrel opening is arranged in the same direction of the outer barrel and the inner barrel, a circle of gap opening is formed between the outer barrel opening and the inner barrel opening, a hot air inlet is arranged close to the outer barrel opening, an air outlet is arranged at the rear part of the outer barrel opposite to the direction of the outer barrel. The invention relates in particular to the arrangement of the hot air inlet of the laundry dryer.

[ background of the invention ]

A clothes dryer, particularly a washing and drying machine, generally has a cylindrical inner tub and an outer tub sleeved outside the inner tub. The inner barrel is provided with a plurality of through holes, so that water can pass through the through holes to wash clothes in the washing process, or the water passes through the through holes to enter the outer barrel under the action of centrifugal force in the dehydration process and is discharged from the rear part of the outer barrel. In addition, because the inner barrel is axially displaced relative to the outer barrel under the action of unbalanced force in the rotating process, a gap with a certain distance is reserved between the inner barrel and the outer barrel in order to avoid damaging the outer barrel and the inner barrel.

In the drying process, hot air enters from the opening directions of the outer barrel and the inner barrel and leaves from the rear part of the outer barrel. Ideally, the hot air uniformly passes through the laundry in the inner tub, sufficiently exchanges heat with the laundry, evaporates moisture in the laundry, and leaves the outer tub as saturated hot and humid air. However, in practice, since the inner tub has the through holes and the gap is formed between the inner tub and the outer tub, part of the hot air inevitably leaks from the gap and does not or only partially participate in the evaporation of moisture from the laundry.

Especially, when there are more laundry in the inner tub, a large flow resistance is formed in the inner tub, and thus a large amount of hot air leaks from a gap between the inner tub and the outer tub. Meanwhile, the larger flow resistance in the inner barrel enables hot air to enter the gap from the through hole more easily. Accordingly, the hot air in the inner tub involved in the evaporation of the moisture is reduced. The air discharged from the air outlet at the rear of the tub at this time mixes the moist air participating in evaporation and the dry hot air from the bypass gap. Such mixed air has a low water content and does not reach a saturated state. The air with higher temperature and less than saturation enters the condensing device from the outer barrel to be cooled, so that the temperature is reduced to be below the dew point to condense the moisture in the air. In the process, the hot air which does not completely participate in the evaporation is cooled. Therefore, the efficiency of the drying process is low, long drying time is needed, and a large amount of heat energy is wasted.

[ summary of the invention ]

An object of the present invention is to reduce a portion of an air flow of a dryer directly leaving a tub from a gap between an inner tub and the tub during a drying process, so that hot air entering the tub can sufficiently participate in moisture evaporation of laundry.

Aiming at the purposes, the technical scheme adopted by the invention is as follows: a clothes dryer comprises an inner barrel and an outer barrel sleeved outside the inner barrel, wherein a gap is formed between the inner barrel and the outer barrel, the inner barrel is provided with a barrel-shaped side wall, a plurality of through holes are distributed on the barrel-shaped side wall, an inner barrel opening is formed in one axial side of the inner barrel, an outer barrel opening is formed in the position, close to the inner barrel opening, of the outer barrel, a circle of gap opening is formed between the outer barrel opening and the inner barrel opening, a hot air inlet is formed close to the outer barrel opening, an air outlet is formed in the rear portion, opposite to the outer barrel opening, of the outer barrel, hot air is driven by a fan to enter the outer barrel from the hot air inlet, the hot.

At relatively high velocities, the air flow leaving the nozzle has the following characteristics: the high-speed airflow forms a main airflow, and the movement direction of the main airflow is mainly determined by the spray head; under the influence of the adhesion forces of the primary air flow, the surrounding air is dragged by the primary air flow, thereby creating a pressure drop around the primary air flow, so that more air flows are drawn towards the primary air flow.

In the above technical solution of the present invention, the hot air flow ejected from the plurality of nozzles is directed toward the central axis of the inner tub or below the central axis along the direction of the nozzles. The pressure drop is also greatest near the spray head, where the gas flow is most concentrated and the velocity of the gas is highest. Because the nozzle is arranged at the opening of the outer barrel, the position is also the position of the gap opening, and then the air in the gap quickly draws close to the hot air flow sprayed by the nozzle and reenters the inner barrel along with the hot air flow. Therefore, at least at the front part of the outer barrel close to the opening of the outer barrel, the air entering the gap from the through hole of the roller continuously enters the inner barrel along with the hot air flow sprayed by the spray head to participate in the evaporation of the moisture, and is not directly discharged from the air outlet. Therefore, by the technical scheme, the drying efficiency of the clothes dryer can be obviously improved, and meanwhile, heat energy is saved.

Meanwhile, compared with a single spray head, the plurality of spray heads enable the range of the air flow dragged in the gap to be larger, and the purpose of the invention is more favorably realized.

The spray heads may be arranged to be evenly distributed around the gap opening. Thus, the hot air flow enters the inner barrel more uniformly, and more importantly, the air flow in the gap can be drawn out more, and the air flow is prevented from flowing away from the gap at the position where the spray head is sparsely distributed in a large amount.

Preferably, each spray head is perpendicular to the gap in which it is mounted. This arrangement prevents hot air from the nozzle from directly entering the gap through the gap opening.

The nozzle is arranged on a sealing ring connecting the opening of the outer barrel and the shell. The spray head can also be integrally formed on the sealing ring.

In addition, the nozzle outlet is sized to match the speed of the fan and is positioned such that the primary air stream emitted from the nozzle draws the secondary air stream in the gap toward and into the primary air stream. With the nozzle outlet size determined, the higher the fan speed, the higher the primary air flow velocity, and the greater the amount of secondary air flow it drags. Whereas the smaller jet outlet provides a higher primary air flow rate when the fan speed is determined. In practical application, the size of the outlet of the nozzle is matched with the rotating speed of the fan, and the nozzle is correspondingly arranged according to practical conditions.

Further, the inner barrel shaft is preferably disposed substantially horizontally or obliquely.

The invention will be further described with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is an overall schematic view of a dryer;

FIG. 2 is a schematic diagram of the distribution of the nozzles and the direction of the gas outlet of the nozzles.

[ detailed description ] embodiments

As shown in fig. 1, the dryer 100 has an outer tub 4 and an inner tub 6 provided in a cabinet 2. Wherein the inner barrel 6 is sleeved in the outer barrel 4. And the inner tub 6 has a cylindrical sidewall 61. The cylindrical side wall 61 is provided with a large number of through holes 62. The central shaft 63 of the inner tub 6 is horizontally disposed. In order to prevent the inner tub 6 from hitting the outer tub 4 when eccentric vibration occurs during rotation, a gap 8 of a predetermined distance is provided between the inner tub 6 and the outer tub 4. The inner tub 6 is spatially communicated with the outer tub 4 through the through holes 62 and the gap 8.

Further, the inner barrel 6 has an inner barrel opening 64 at one side in the axial direction. The outer tub 4 is provided with a tub opening 44 at a position adjacent to the inner tub opening 64. A ring of clearance openings 84 are formed between the outer barrel opening 44 and the inner barrel opening 64. The cabinet 2 is provided with a laundry inlet 24 at a position corresponding to the outer tub opening 44 and the inner tub opening 64, and a door 22 for opening or closing the laundry inlet 24. The laundry inlet 24 is connected to the tub opening 44 by an elastic gasket 12.

In order to dry the laundry placed in the inner tub 6, the outer tub 4 is connected to an air treatment system 30. The air treatment system 30 includes an air condensing unit 31, a fan 32, and an air heating unit 33 connected in series. Wherein the air condensing unit 31 is connected to an air outlet 42 provided on the tub 4, and cools air from the tub 4 introduced therein, so that moisture in the air is condensed into dew and separated from the air. Wherein the air outlet 42 on the tub 4 in fig. 1 is located on a tub rear end face 46 opposite to the tub opening 44. In other embodiments, the air outlet 42 may be disposed at other positions of the rear portion of the tub opposite to the tub opening 44, such as on the side wall of the tub. The fan 32 is disposed downstream of the condensing unit 31 to promote the flow of air between the tub 4 and the air handling system 20. The air passes through the air heating device 33 after passing through the fan 32, thereby being heated. The heated air enters the tub 4 and the inner tub 6 through the hot air inlet 50 provided near the tub opening 44.

As shown in fig. 1 and 2, the hot air inlet 50 includes a plurality of spray heads 51. These nozzles 51 are integrally formed on the gasket 12 or mounted on the gasket 12. The spray heads 51 are evenly distributed along the circumference of the seal ring 12. Since the gasket 12 is connected to the tub opening 44 and the gap opening 84 is adjacent to the tub opening 44, the nozzles 51 are uniformly distributed around the circumference of the gap opening 84. Further, the spray head 51 is disposed toward the central axis 63 of the inner tub 6. Since the air outlet 42 is located at a lower position of the outer tub 4, the spray head 51 may be directed downward of the central shaft 63 in other alternative embodiments.

The outlet size of the spray head 51 should be significantly smaller than the typical hot air outlet of the prior art. At the same time, the speed of the fan 32 should be relatively high so that the heated air is ejected from the nozzle 51 at a high speed by the size of the nozzle 51 outlet in cooperation with the speed of the fan 32. The primary air flow a1 from the nozzle 51 drags the secondary air flow a2 in the gap 8 to converge toward and join the primary air flow a 1.

Then, during the drying process, a large amount of high-speed main air flow a1 ejected from the ejection head 51 is ejected toward the middle or lower portion of the inner tub 6. Part of the air flow penetrates the laundry, evaporates moisture in the laundry, and leaves the tub 4 through the air outlet 42 to enter the condensing unit 31. Another part of the air current is blocked by the clothes and then passes through the through holes 62 on the inner barrel 6 to enter the gap 8 between the inner barrel 6 and the outer barrel 4. Due to the dragging action of the main air flow a1 ejected from the nozzle 51, the air flow in the gap 8 moves toward the gap opening 84 and becomes the secondary air flow a2 added to the main air flow a1, and returns to the inner tub 6 from the beginning, so that there is an opportunity to exchange heat with the laundry to evaporate moisture in the laundry. By such an air current movement, the hot air entering the inner tub 6 is less directly passed from the gap 8 to the air outlet 42. The humidity of the hot air tends to be saturated and then enters the condensing device 31, and the drying efficiency is obviously improved.

In a preferred embodiment, each spray head 51 is perpendicular to the gap 8 in the position in which it is mounted.

The various embodiments described above and shown in the drawings are illustrative of the invention and are not exhaustive of the invention. Any modification of the present invention by a person of ordinary skill in the related art within the scope of the basic technical idea of the present invention is within the scope of the present invention.

Claims

1. The utility model provides a clothes dryer, contains interior bucket (6) and cover outer bucket (4) of locating outside interior bucket, has clearance (8) between interior bucket and the outer bucket, and interior bucket (6) have tube-shape lateral wall (61), it has a plurality of through-holes (62) to distribute on the tube-shape lateral wall, interior axial one side of bucket has interior bucket opening (64), the position that is close to on outer bucket (4) and interior bucket opening (64) is equipped with outer bucket opening (44), form round clearance opening (84) between outer bucket opening (44) and interior bucket opening (64), it is equipped with hot-air inlet (50) to be close to outer bucket opening, outer bucket rear portion opposite with outer bucket opening (44) direction is equipped with air outlet (42), wherein hot-air is driven by fan (32) and gets into outer bucket (4) from hot-air inlet (50), its characterized: the hot air inlet (50) is provided with a plurality of spray heads (51) which face the central axis (63) of the inner barrel or the lower part of the central axis, the outlet sizes of the spray heads (51) are matched with the rotating speed of the fan (32), and the spray heads (51) are arranged to enable the primary air flow (A1) sprayed out of the spray heads (51) to drag the secondary air flow (A2) in the gap (8) to be converged towards and added into the primary air flow (A1).

2. The clothes dryer of claim 1, wherein: the spray heads (51) are evenly distributed around the gap opening (84).

3. The clothes dryer of claim 1, wherein: each nozzle (51) is perpendicular to the gap (8) in the position where it is mounted.

4. The clothes dryer of claim 1, wherein: the spray head (51) is arranged on a sealing ring (12) connecting an outer barrel opening (44) and the machine shell (2).

5. The clothes dryer of claim 4, wherein: the spray head (51) is integrally formed on the sealing ring (12).

6. The clothes dryer of claim 1, wherein: the inner tub shaft (63) is disposed substantially horizontally or obliquely.