CN108797052B

CN108797052B - Clothes dryer comprising a condensation device

Info

Publication number: CN108797052B
Application number: CN201710281345.2A
Authority: CN
Inventors: 刘军; 徐永刚; 陆飞; 张秀华; 张琦
Original assignee: BSH Electrical Appliances Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2017-04-26
Filing date: 2017-04-26
Publication date: 2022-03-22
Anticipated expiration: 2037-04-26
Also published as: EP3396055B1; CN108797052A; EP3396055A1; PL3396055T3

Abstract

A clothes dryer comprises a condensing device, wherein the condensing device comprises a hot air channel communicated with a drying chamber and a water supply device for inputting cooling water into the hot air channel, an inlet of the hot air channel is positioned at a lower position, an outlet of the hot air channel is positioned at a higher position, at least one flow guide rib is formed on the wall of the hot air channel, the upper end of the flow guide rib is close to the outlet of the water supply device, the lower end of the flow guide rib is close to the inlet of the hot air channel, and the flow guide rib and the wall of the hot air channel jointly define a flowing area of the cooling water. The cooling water enters the hot air channel and then enters a cooling water flowing area defined by the flow guide ribs and the wall of the hot air channel, and does not splash at will. Therefore, the condensation effect is more stable, and the condensation efficiency is improved.

Description

Clothes dryer comprising a condensation device

[ technical field ] A method for producing a semiconductor device

The present invention relates to a clothes dryer including a condensing means, wherein the condensing means includes a hot air passage communicating with a drying chamber, and a water supplying means for inputting cooling water into the hot air passage.

[ background of the invention ]

Clothes dryers typically include machines having a purely clothes drying function as well as machines integrating washing and drying functions. The drying principle of the dryer can be roughly summarized as follows: under the action of the heating device, dry air is heated by the heating device to form dry hot air, then the dry hot air enters the drying barrel to exchange heat with wet clothes, moisture in the clothes is taken away to form relatively wet hot air, the wet hot air then passes through the condensation action of the condensation device, the moisture in the wet hot air is condensed into water and then is discharged through the drain pipe, the condensed air becomes relatively dry cold air and is guided into the heating device again under the action of the fan, the dry hot air formed by heating enters the next cycle, and the process is repeated until the drying process is finished.

The condensing means may include cooling water supply means. The cooling water meets the moist hot air to lower the temperature of the hot air, thereby separating the moisture therein. After entering the hot air channel, the cooling water is easily blown away by high-speed airflow, and the condensation effect is unstable. Meanwhile, the blown water droplets may enter the fan and the heating passage downstream in the hot air circulation direction, thereby reducing the drying efficiency.

[ summary of the invention ]

The invention aims to improve the condensation efficiency of the condensation device of the existing clothes dryer.

In view of the above, the present invention provides a clothes dryer comprising a condensing device, wherein the condensing device comprises a hot air channel communicated with a drying chamber, and a water supply device for inputting cooling water into the hot air channel, an inlet of the hot air channel is at a lower position, an outlet of the hot air channel is at a higher position, at least one flow guiding rib is formed on a wall of the hot air channel, an upper end of the flow guiding rib is close to the outlet of the water supply device, a lower end of the flow guiding rib is close to the inlet of the hot air channel, and the flow guiding rib and the wall of the hot air channel define a flow area of the cooling water together. The cooling water enters the hot air channel and then enters a cooling water flowing area defined by the flow guide ribs and the wall of the hot air channel. In this region, the water stream flows down against the wall. The diversion ribs avoid the transverse interference of hot air, so that the water flow is stable and cannot splash randomly. Therefore, the condensation effect is more stable, and the condensation efficiency is improved.

The invention is further improved in that the walls of the hot air passage include a first wall and a second wall which are wide and face each other, and a third wall which is narrow and connects the first wall and the second wall, the first flow guide rib is located on the first wall, the second flow guide rib is located on the second wall, and the cooling water flowing region is formed on the first wall, the second wall and the third wall which are bounded by the first flow guide rib and the second flow guide rib. The structure simultaneously plays the role of guiding the flow of the wall and the flow guiding ribs of the hot air channel, so that the water flow stably flows along one side of the hot air channel.

Preferably, the outlet of the water supply means is higher than the horizontal center line of the hot air passage and is disposed opposite to the cooling water flowing region. This arrangement allows the cooling water to have a longer heat exchange path while ensuring that the water flow enters the cooling water flow area.

A laterally protruding structure is arranged below the flow area of the cooling water. On one hand, the protruding structure blocks and changes the flow path of the cooling water, so that the cooling water is transversely diffused on the surface of the protruding structure; the protruding structure blocks hot air from below on the other hand, and the hot air is turbulent. Then, the turbulent hot air and the diffused cooling water meet at the position where the protruding structure is located, and the turbulent hot air and the diffused cooling water are in full contact and mutual disturbance, and heat exchange occurs. It follows that the protruding structures exert non-trivial positive effects. Meanwhile, since the projection structure is provided below the cooling water flowing region, a certain potential energy is already accumulated when the cooling water reaches the projection structure, and thus dispersion occurs on the projection structure.

In particular, the projection extends from the third wall towards the interior of the hot air channel and has a free end which overhangs in the air towards a central region of the cross-section of the hot air channel. The cooling water will flow out from the free end, so that the cooling water is closer to the central area of the cross section of the hot air passage, and is in full contact with the hot air coming from below.

Further, the projection arrangement connects the first wall and the second wall. The cooling water then only drops at the free end of the projection and enters more into the central region of the hot air channel cross section.

The hot air channel is provided with a section of bend near the inlet, and the protruding structure is arranged at the joint of the bend. The air turbulence at the bending part is stronger, and the protruding structure arranged on the bending part more favorably utilizes the design characteristics of the hot air channel to improve the condensation efficiency.

The protruding structure is a plate integrally formed with the wall of the hot air passage.

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

[ description of the drawings ]

FIG. 1 is a schematic view of a tub and condensing unit of a dryer;

fig. 2 is a schematic sectional view taken along the direction a-a in fig. 1.

[ detailed description ] embodiments

As shown in fig. 1, the dryer has a tub 2 constituting a drying chamber of laundry, a hot air path 4 spatially communicating with the tub 2, and a fan 6 circulating air between the tub 2 and the hot air path 4. Wherein the hot air path 4 has an inlet 41 at a lower position and connected to the tub 2 and an outlet 42 at an upper position and connected to the fan 6. A water supply device 8 for supplying cooling water into the hot air channel 4 is provided on the hot air channel 4 at a suitable position above the horizontal center line a1 thereof. The hot air passage 4 and the water supply device 8 constitute the main elements of the condensing device 10.

As shown in fig. 1 and 2, the hot air passage 4 includes a first wall 4a and a second wall 4b facing each other, which are wide, and another pair of third walls 4c and fourth walls 4d facing each other, which are narrow. Wherein the first wall 4a is integrally formed with a first flow guiding rib 11a, and the second wall 4b is integrally formed with a second flow guiding rib 11 b. The first and second

flow guide ribs

11a and 11b protrude toward the inside of the hot air duct 4 while being adjacent to the third wall 4c connecting the first and

second walls

4a and 4b, so that the cooling water flowing region 12 is formed on the first, second, and

third walls

4a, 4b, and 4c with the first and second

flow guide ribs

11a and 11b as boundaries. The first and

second guide ribs

11a and 11b have

upper ends

111a and 111b close to the outlet 81 of the water supply device 8 and

lower ends

112a and 112b close to the hot air path inlet 41. In order to make the cooling water more surely enter the cooling water flow region 12, an outlet 81 of the water supply means is provided opposite to the cooling water flow region 12.

A baffle plate 14 integrally formed with the third wall 4c extends laterally from the third wall 4c below the cooling water flow region 12 toward the interior of the hot air passage 4. The other side of the baffle 14 opposite to the side connected to the third wall 4c is a free end 141 overhanging the central region of the cross-section of the hot wind channel 4. The other two sides of the baffle 14 may be connected with the first wall 4a and the second wall 4 b. The cooling water meets the baffle 14 in the process of falling along the cooling water flowing area 12, changes the flowing path, spreads transversely on the surface of the baffle 14, and falls into the central area of the cross section of the hot air channel 4 from the free end 141. The baffle 14 on the other hand blocks the hot air from below, and makes the hot air turbulent. The turbulent hot air and the diffused cooling water meet at the position where the baffle 14 is located, and the turbulent hot air and the diffused cooling water are in full contact and mutual disturbance, and heat exchange is generated.

The hot air channel 4 has a bend 43 near the inlet 41. The baffle 14 is disposed at the bend juncture 44. The air turbulence at the bend is stronger, and the baffle 14 is arranged to make more favorable use of the structural characteristics of the hot air channel 4, thereby improving the condensation efficiency.

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. A clothes dryer comprising condensation means, wherein the condensation means (10) comprises a hot air channel (4) communicating with a drying chamber (2), and water supply means (8) for feeding cooling water into the hot air channel, an inlet (41) of the hot air channel being in a lower position, and an outlet (42) of the hot air channel being in an upper position, characterized in that: at least one flow guiding rib (11a, 11b) is formed on the wall (4a, 4b, 4c, 4d) of the hot air channel, the upper end (111a, 111b) of the flow guiding rib is close to the outlet (81) of the water supply device, the lower end (112a, 112b) of the flow guiding rib is close to the inlet (41) of the hot air channel, the flow area (12) of the cooling water is defined by the flow guiding rib (11a, 11b) and the wall (4a, 4b, 4c, 4d) of the hot air channel together, a protruding structure (14) which extends transversely is arranged below the flow area (12) of the cooling water, a section of bend (43) is arranged at the position of the inlet (41) of the hot air channel (4), the protruding structure (14) is arranged at the bend joint (44), and the protruding structure (14) is provided with a free end (141) which extends out in a suspended mode towards the central area of the cross section of the hot air channel (4).

2. The clothes dryer of claim 1, wherein: the wall of the hot air channel comprises a first wall (4a) and a second wall (4b) which are relatively wide and face each other, and a third wall (4c) which is relatively narrow and connects the first wall (4a) and the second wall (4b), wherein a first flow guide rib (11a) is arranged on the first wall, a second flow guide rib (11b) is arranged on the second wall, and a cooling water flowing area (12) is formed on the first wall (4a), the second wall (4b) and the third wall (4c) which are in a boundary with the first flow guide rib (11a) and the second flow guide rib (11 b).

3. The clothes dryer of claim 1, wherein: the outlet (81) of the water supply means is higher than the horizontal center line (a1) of the hot air passage and is disposed opposite to the cooling water flowing region (12).

4. The clothes dryer of claim 2, wherein: the projection (14) projects from the third wall (4c) into the hot air duct (4).

5. The clothes dryer of claim 4, wherein: the protruding structure (14) connects the first wall (4a) and the second wall (4 b).

6. The clothes dryer of claim 1, wherein: the protruding structure is a plate (14) formed integrally with the wall (4a, 4b, 4c, 4d) of the hot air channel.