CN111254668A

CN111254668A - Clothes drying appliance

Info

Publication number: CN111254668A
Application number: CN201811451051.0A
Authority: CN
Inventors: 朱玉婷; 陈利君; 陆飞; 张琦; 刘云
Original assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd; Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2020-06-09
Also published as: EP3660193A1

Abstract

A clothes drying apparatus comprises a horizontal or inclined inner barrel rotatably arranged in an outer barrel, wherein the wall of the inner barrel is provided with a plurality of densely distributed holes so as to allow process air participating in drying to circulate between the inner barrel and the outer barrel, the rear wall of the inner barrel is connected with a driving shaft driving the inner barrel to rotate, the driving shaft penetrates through a bearing arranged on the rear wall of the outer barrel, the outer barrel is connected with a process air channel, a fan is arranged in the process air channel, the inlet of the process air channel is arranged on the rear wall of the outer barrel or close to the rear wall of the outer barrel, a heat exchange device is arranged between the rear wall of the outer barrel and the rear wall of the inner barrel, the heat exchange device comprises a flat-.

Description

Clothes drying appliance

[ technical field ] A method for producing a semiconductor device

The invention belongs to the technical field of household appliances, and relates to a clothes drying appliance, in particular to a clothes drying appliance with a heat exchange device.

[ background of the invention ]

Chinese patent application publication No. CN105463804A discloses a clothes dryer having a clothes treating tub assembly in a cabinet, which includes an inner tub driven by a motor to rotate and an outer tub sleeved outside the inner tub. The outer barrel is connected with the condensing channel and is communicated with the space; the condensation channel is further connected with the fan and the air heating channel in sequence; the other end of the air heating channel is communicated with the outer barrel space; thus, an air circulation path is formed among the tub, the condensing passage, the fan, and the air heating passage. In the drying procedure, a heater in the air heating channel heats the drying air flowing through the air heating channel; the heated high-temperature drying air enters the clothes treatment barrel assembly under the action of the fan, and the damp clothes in the inner barrel are heated, so that the moisture in the clothes is evaporated; the drying air carries the evaporated moisture to enter the condensation channel, the moisture in the drying air is condensed to be changed into liquid state again, the drying air is separated from the drying air, the drying air is changed into low temperature again to be dried, the drying air enters the heating channel again under the drive of the fan, a new round of circulation is started, and the operation is repeated in this way, and finally the clothes in the inner barrel are dried. Wherein, the condensing channel is connected with a cooling water inlet pipe. In the drying process, cooling water flows into the condensing channel from the water inlet pipe, so that heat exchange is carried out between the cooling water and the drying air entering the condensing channel, and moisture in the drying air is condensed.

US invention patent publication US6279357B1 discloses a washer-dryer. The washing and drying machine has a drum mounted in an outer tub through a tripod. The back wall of the outer barrel is provided with a groove. The water flows from the water inlet device to the rear wall of the outer barrel. In the drying mode, the drum is rotated, and the humid air leaves the drum under the rotation of the drum and is agitated. The trickling water comes into contact with the humid air, thereby promoting a condensation effect on the air before the air is heated and returned to the drum along the circulation path.

[ summary of the invention ]

An object of the present invention is to provide a laundry drying appliance having a compact structure and high drying efficiency.

The invention may be implemented as: a clothes drying apparatus comprises an inner barrel which is horizontally or obliquely arranged and is rotatably arranged in an outer barrel, the wall of the inner barrel is provided with a plurality of holes which are densely distributed so as to allow process air participating in drying to circulate between the inner barrel and the outer barrel, the rear wall of the inner barrel is connected with a driving shaft driving the inner barrel to rotate, the driving shaft passes through a bearing arranged on the rear wall of the outer barrel, the outer barrel is connected with a process air channel, a fan is arranged in the process air channel, the inlet of the process air channel is arranged on the rear wall of the outer barrel or close to the rear wall of the outer barrel, a heat exchange device is arranged between the, the heat exchange device comprises a flat plate-shaped main body, wherein the main body is provided with a fluid channel which is distributed in a tiled way, the fluid channel is provided with an outlet and an inlet and is suitable for receiving a cooling medium from the inlet to enter the fluid channel, and exits the fluid passageway from the outlet, wherein the body is at least partially made of metal or a material having a thermal conductivity comparable to that of metal.

The inlet of the process air channel is positioned on the rear wall of the outer barrel or close to the rear wall of the outer barrel, so that intensive process air flow can be formed between the rear wall of the inner barrel and the rear wall of the outer barrel, the heat exchange device is arranged at the position, the space is saved, and the drying efficiency is higher. Meanwhile, as the cooling medium circulates in the fluid channel, splashing or entering into the process air channel can not occur under the action of process air.

According to one embodiment of the invention, the body comprises through holes, said fluid channels being distributed around the through holes, the drive shaft passing through the through holes of the heat exchange device.

According to another embodiment of the invention, at least one fluid channel is provided on each side of the through hole.

According to an embodiment of the present invention, the main body includes a first wall facing a rear wall of the inner tub, wherein the first wall is a smooth structure, and a second wall facing the rear wall of the outer tub, the second wall being fixed to the rear wall of the outer tub. The smooth first wall prevents fluff carried in the process air from attaching during the drying process and affecting the heat exchange effect. The first wall is fixed on the rear wall of the outer barrel, so that unsmooth structures such as grooves and the like can be arranged on the second wall.

According to one embodiment of the invention, the first wall is made of metal or a material having a thermal conductivity not inferior to that of metal.

According to one embodiment of the invention, the fluid channel is folded and bent, with an acute angle being formed between each two adjacent bent sections.

According to one embodiment of the invention, the fluid channel is folded and bent, the mutually bent sections being parallel to each other.

According to one embodiment of the invention, the fluid channel is folded and curved, having several sections bent over each other, at least part of the sections of the fluid channel being inclined downwards with respect to the horizontal in the direction of fluid flow.

Hereinafter, specific embodiments of the present invention will be described by way of example with reference to the accompanying drawings.

[ description of the drawings ]

Fig. 1 is a schematic view of a laundry drying appliance;

FIG. 2 is a disassembled view of a portion of the components of the clothes drying appliance;

FIG. 3 is a front view of the heat exchange device;

FIG. 4 is a schematic diagram of the components of the heat exchange device shown in FIG. 3.

[ detailed description ] embodiments

As shown in fig. 1, the laundry drying appliance 1 includes an outer tub 2 constituting a main drying chamber and an inner tub 4 rotatably driven by a motor 3 located in the outer tub 2. The wall 41 of the inner tub 4 has dense holes 42 so that the inside of the inner tub 4 and the outer tub 2 are suitable for air circulation. The inner tub rear wall 43 is connected to a drive shaft 44 which drives it in rotation. The driving shaft 44 is connected with the motor 3 after passing through the bearing 23 on the rear wall 22 of the outer barrel. The inner tub 4 is horizontally disposed. In other embodiments, the inner tub may be disposed in an inclined outer tub. The above "horizontal" and "inclination" are referred to the horizontal or inclination of the central axis of the inner barrel 4.

Wherein the outer tub 2 is connected to the process air channel 5. The air inlet 51 of the process air channel 5 is connected to the side wall 21 of the outer tub 2 and is adjacent to the rear wall 22 of the outer tub 2. The air outlet 52 of the process air passage 5 is connected to a gasket 6 installed at the front side of the outer tub 2. The process air channel 5 is then in spatial communication with the outer tub 2. In other embodiments, the inlet of the process air channel 5 may also be connected with the rear wall 22 of the outer tub 2.

A fan 7 and a heating device 8 are arranged in the process air channel 5. Wherein, after the fan 7 is started, the air can be blown to enter the process air channel 5 from the air inlet 51 of the process air channel 5, and then blown out from the air outlet 52 through the heating device 8, and then enters the front part of the outer barrel 2, enters the inner barrel 4 to fully contact with clothes and then passes out from the hole 42 on the inner barrel wall 41, and more air flows enter the gap 9 between the outer barrel rear wall 22 and the inner barrel rear wall 43 with lower pressure after passing through the hole 42, then is concentrated to the air inlet 51 of the process air channel 5 along the gap 9, and finally enters the process air channel 5, thereby completing one-time circulation flow.

As can be seen, the process air passes through the gap 9 between the outer tub rear wall 22 and the inner tub rear wall 43 more densely in the process of flowing to the air inlet 51 of the process air channel 5. A heat exchange device 10 is provided in the gap 9 between the outer tub rear wall 22 and the inner tub rear wall 43. The moist, hot process air then exchanges heat with the heat exchange device 10 as it passes through the gap 9, the temperature drops and the moisture therein condenses. Process air then enters process air channel 5 from air inlet 51 under the action of fan 7. Subsequently, the process air is heated by the heating device 8, and then enters the outer tub 2 and the inner tub 4 again to contact with the laundry therein to further evaporate the moisture in the laundry.

The heat exchanging device 10 is installed between the outer tub rear wall 22 and the inner tub rear wall 43 through which the process air passes relatively intensively, so that the heat exchanging device 10 exerts higher heat exchanging efficiency. In addition, since no special heat exchange channel is required, space is saved, thereby reducing the volume and manufacturing cost of the laundry drying appliance 1.

The heat exchange device 10 is a flat plate structure and is fixed on the outer tub 2, for example, the outer tub rear wall 22. The heat exchange device 10 comprises a fluid channel 11 defined by a material having a relatively good thermal conductivity, the fluid channel 11 having an inlet 12 through a wall 20, e.g. a rear wall 22, of the outer tub 2. The outlet 13 of the fluid channel 11 is located in the outer tub 2. In operation, a cooling medium is supplied into the fluid passage 11 from the inlet 12 of the fluid passage 11. The cooling medium exchanges heat with the process air contacting the heat exchange device 10 through the thermally conductive channel walls, causing the process air to drop in temperature. The cooling medium having the increased temperature is discharged from the bottom of the tub 2. Wherein the cooling medium may be water. The fluid channel 11 can provide a continuous cooling medium for the heat exchange device 10, and the cooling medium flows in the fluid channel 11 and can fully exchange heat with the process air through the channel wall, so that the cooling medium can be fully utilized. Meanwhile, as the cooling medium flows in the fluid passage 11, splashing cannot occur under the blowing of the air flow, and the cooling medium enters the inner barrel 4 to wet clothes and is not sucked into the process air passage 5 by the fan 7. In addition, the heat exchange device 10 of the plate-like structure in which the fluid passages 11 are arranged may be designed to have a relatively thin thickness as needed, so that the width of the gap 9 between the rear wall 22 and the inner tub rear wall 43 is not critical, and air passing through the gap is facilitated.

In the embodiment shown in fig. 2, the heat exchange device 10 comprises a plate-like body 14. The body 14 is of substantially annular configuration with a circular through bore 15. The main body 14 is fixed to the rear wall 22 of the outer tub 2 by various possible fixing means, such as welding, gluing, screwing or injection molding. Wherein the main body 14 is coaxial with a bearing 23 on the rear wall 22 of the outer tub 2 and thus also substantially coaxial with the inner tub 4. The driving shaft 44 passes through the through hole 15 of the heat exchange device 10. The heat exchange device 10 is arranged in such a way that the heat exchange device can be spread by fully utilizing the size of the outer barrel rear wall 22, so that the heat exchange area is as large as possible, and the heat exchange efficiency is improved. Meanwhile, the installation of the outer barrel 2, the inner barrel 4 and the driving system is not influenced. Advantageously, the hot and humid process air is more closely adjacent to the tub rear wall 22 along the edges of the tub 2 and the inner tub 4, so the design of the through holes 15 may make the fluid channels 11 more intensively distributed in the area where the process air is more concentrated.

As shown in fig. 3 and 4, the body 14 of the heat exchange device 10 has the fluid passages 11 distributed flatly. The fluid channel has an inlet 12 and an outlet 13 adapted to receive a cooling medium from the inlet 12 into the fluid channel 11 and from the outlet 13 out of the fluid channel 11.

Wherein the body 14 comprises a first and a second substantially

annular sheet

141 and 142, respectively, made of metal. The first sheet 141 is substantially flat. The second sheet 142 has a preformed groove 16 therein. The first sheet 141 and the second sheet 142 are attached to each other to form a substantially annular body 14. While forming the fluid channel 11 in the space enclosed by the groove 16 and the first sheet 141. The material of the first and

second sheets

141 and 142 may be other materials with better heat conductivity, at least equal to that of common metals.

From the inlet 12, the flow channel 11 is divided into two, one on each side of the through-hole 15, and has an outlet 13 at each end. The cooling medium entering the fluid passage 11 from the inlet 12 is then left from both sides of the through-hole 15, respectively, to fill the entire fluid passage 11 while uniformly exchanging heat with the process air passing through both sides of the through-hole 15.

In the embodiment shown in fig. 3 and 4, the fluid channel 11 is folded and bent, and the mutually bent sections 110 are parallel to each other.

In other embodiments not shown in the figures, it may be implemented such that an acute angle is formed between every two adjacent bent sections. After the heat exchange device is mounted on the back wall of the outer barrel, the flat plate-shaped main body is vertically or obliquely mounted relative to the horizontal plane according to the arrangement mode of the outer barrel and the inner barrel, and the inlet of the fluid channel is higher than other parts of the fluid channel. At this time, at least a partial section of the fluid passage is inclined downward with respect to the horizontal plane in the fluid flow direction. Typically, the cooling medium is tap water. The cooling water can generate larger potential energy in the inclined bending area and generate larger turbulence in the bending section, so that the sediment accumulation of sediment in water in the bending section is reduced, the water flow in the fluid channel is smoother, and the blockage of the fluid channel is avoided.

As shown in fig. 2 and 4, the heat exchange device 10 is installed such that the first sheet 141 of a smooth structure faces the rear wall of the inner tub and the second sheet 142 having the pre-formed grooves 16 faces the rear wall of the outer tub. The second sheet 142 is fixed to the rear wall 22 of the tub. The first and

second sheets

141 and 142 constitute first and second walls of both sides of the body 14, respectively.

The various embodiments described above and shown in the drawings are merely illustrative 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. A clothes drying appliance, comprising a horizontal or inclined inner tub rotatably disposed in an outer tub, an inner tub wall having a plurality of densely distributed holes to allow circulation of process air involved in drying between the inner tub and the outer tub, an inner tub rear wall connected to a driving shaft for driving the inner tub to rotate, the driving shaft passing through a bearing disposed on the outer tub rear wall, characterized in that: the outer barrel is connected with a process air channel, a fan is arranged in the process air channel, an inlet of the process air channel is positioned on or close to the rear wall of the outer barrel, a heat exchange device is arranged between the rear wall of the outer barrel and the rear wall of the inner barrel, the heat exchange device comprises a flat-plate-shaped main body, a fluid channel is flatly distributed in the main body, the fluid channel is provided with an outlet and an inlet and is suitable for receiving a cooling medium, the cooling medium enters the fluid channel from the inlet and leaves the fluid channel from the outlet, and the main body is at least partially made of metal or a material with heat conductivity not lower than that.

2. The laundry drying appliance of claim 1, wherein: the body includes through-holes around which the fluid passages are distributed, and the driving shaft passes through the through-holes of the heat exchanging device.

3. The laundry drying appliance of claim 2, wherein: at least one fluid channel is respectively arranged on two sides of the through hole.

4. The laundry drying appliance of claim 1, wherein: the main body comprises a first wall facing the rear wall of the inner barrel and a second wall facing the rear wall of the outer barrel, wherein the first wall is of a smooth structure, and the second wall is fixed on the rear wall of the outer barrel.

5. The clothes drying appliance of claim 4, wherein: the first wall is made of metal or a material having a thermal conductivity not inferior to that of metal.

6. The laundry drying appliance of claim 1, wherein: the fluid channel is folded and bent, and an acute angle is formed between every two adjacent bent sections.

7. The laundry drying appliance of claim 1, wherein: the fluid channel is folded and bent, and the sections bent to each other are parallel to each other.

8. The laundry drying appliance of claim 1, wherein: the fluid channel is folded and bent, and is provided with a plurality of sections bent to each other, and at least part of the sections of the fluid channel is inclined downwards relative to the horizontal plane along the flowing direction of the fluid.