CN111321567B

CN111321567B - Clothes dryer

Info

Publication number: CN111321567B
Application number: CN201811522399.4A
Authority: CN
Inventors: 姚伯礼; 杨帆; 崔建民
Original assignee: BSH Electrical Appliances Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2018-12-13
Filing date: 2018-12-13
Publication date: 2024-04-12
Anticipated expiration: 2038-12-13
Also published as: CN111321567A; EP3666966B1; EP3666966A1; PL3666966T3

Abstract

A clothes dryer comprises an inner tub for accommodating clothes and an outer tub arranged around the inner tub, wherein first holes are densely distributed on the wall of the inner tub and are communicated with the space of the outer tub, a plurality of second holes are formed in the wall of the outer tub, and a water outlet area defined by the second holes extends horizontally. The outer side of the outer barrel wall, which is far away from the inner barrel direction, is provided with a water separator. The water directly flows out from the wall of the outer barrel inwards, so that the installation is simpler compared with the water supply pipe which directly extends into a narrow space between the outer barrel and the inner barrel, and the water flows along the inner surface of the wall of the outer barrel instead of falling from the middle of a limited gap, thereby greatly reducing the probability of water entering the inner barrel.

Description

Clothes dryer

[ field of technology ]

The invention belongs to the technical field of household appliances, and relates to a clothes dryer with a condensing device.

[ background Art ]

The U.S. patent No. 6279357B1 discloses a washer-dryer. The washing and drying machine has a drum mounted in an outer tub by a tripod. The rear wall of the outer tub has a groove. Water flows from the water inlet means onto the rear wall of the outer tub. In the drying mode, the drum rotates, and the humid air exits the drum and is stirred by the rotation of the drum. The trickle water contacts the humid air to enhance the condensing effect on the air before the air is heated and returned to the drum along the circulation path.

The gap between the tub and the drum is generally very small. And the drum wall often has holes therein to facilitate the passage of water or gas. In addition, during the drying process, the process air in the tub and the drum flows rapidly by the fan. The cooling water easily enters the drum after entering the tub to wet the laundry therein.

[ invention ]

An object of the present invention is to improve the existing clothes dryer.

The invention provides a clothes dryer, which comprises an inner barrel for accommodating clothes and an outer barrel arranged around the inner barrel, wherein first holes are densely distributed on the wall of the inner barrel so as to be communicated with the space of the outer barrel, a plurality of second holes are formed on the wall of the outer barrel, and a water outlet area defined by the second holes extends horizontally. The outside of outer bucket wall in deviating from interior bucket direction is equipped with the water knockout drum, and wherein the water knockout drum contains water inlet and covers the shroud of second hole, and the shroud has the port of being connected with outer bucket wall sealing, forms the water storage chamber that the cross-sectional area that is greater than the water inlet cross-sectional area perpendicular to the water inlet direction between shroud and the outer bucket wall.

The water outlet area is understood to be the area in which the second holes are distributed. When the second holes are in a row of regular arrangement, the water outlet area is a continuous surface with the edges of all the second holes in the row as edges; when the second holes are in multiple rows or irregularly distributed, the water outlet area is a continuous surface surrounded by the edges of the second holes at the edges.

The water directly flows out from the wall of the outer barrel inwards, so that the installation is simpler compared with the water supply pipe which directly extends into a narrow space between the outer barrel and the inner barrel, and the water flows along the inner surface of the wall of the outer barrel instead of falling from the middle of a limited gap, thereby greatly reducing the probability of water entering the inner barrel. The water flowing along the wall surface is less likely to be blown away by the air flow and enter the inner barrel.

The sectional area of the water storage cavity is larger than that of the water inlet, so that water flow is buffered in the water storage cavity, water can flow out of the second hole uniformly, and the flow speed is also gentle. The uniform and gentle water flow flows along the inner surface of the outer barrel wall, so that the water is not easy to enter the inner barrel, and the water has larger heat exchange area, thereby having higher heat exchange efficiency.

The inner barrel and the outer barrel are in cylindrical shape, the axial direction is horizontal or inclined, and the water separator can be arranged on the side wall and/or the rear wall of the outer barrel.

In some embodiments, the inner barrel and the outer barrel are axially and horizontally arranged, the water separator is arranged on the side wall of the outer barrel, and the water outlet area is close to or lower than the horizontal plane where the central shaft of the barrel is positioned. Because the outer barrel wall higher than the horizontal plane where the barrel central shaft is positioned has a downward bending radian, when the water outlet area is too high, water flowing out of the water outlet area is easy to drop onto the inner barrel under the action of gravity and enters the inner barrel.

The water outlet region may be embodied in connection with a higher upper region of the water storage chamber. Then water is gathered at the bottom of the water storage cavity after entering the water storage cavity from the water inlet, then the water surface rises, finally reaches the position of the water outlet area, and slowly overflows from the second hole. The structure makes the water flow entering the outer barrel even and gentle, prevents the water flow from entering the inner barrel, and improves the heat exchange efficiency.

The improvement of the invention also comprises that the inner surface of the outer barrel wall is provided with a first area which is subjected to hydrophilic treatment and a second area which is hydrophobic. The inner surface after hydrophilic treatment spreads the flowing water flow, flows through a larger area, and improves the heat exchange area, thereby improving the heat exchange efficiency.

Wherein the hydrophilic treatment may include at least one of spark etching, laser etching, spraying a hydrophilic coating, and plasma treatment.

The water separator is connected with a water inlet pipe, a water valve controlled by a control device is arranged on the water inlet pipe, and the control device is used for controlling the water valve to be opened in the process of executing a drying program.

The dryer further includes a fan and a heating device in operative communication with the drying space surrounded by the tub, and the fan and the heating device are controlled to be turned on by the control device during the execution of the drying process by the control device. It is understood that any one of the fan and the heating means may be located either directly in the drying space surrounded by the tub or in the space communicating with the drying space.

The advantageous improvement further comprises that the total cross-sectional area of the second holes is larger than the cross-sectional area of the water inlet on the water separator. Therefore, the water flow flowing out of the second hole is not influenced by the water pressure from the water inlet, and the water flow does not generate a spraying phenomenon and enters the inner barrel.

Specific embodiments of the present invention will be described below by way of example with reference to the accompanying drawings.

[ description of the drawings ]

Fig. 1 is a side schematic view of main functional components of a dryer of a first embodiment;

FIG. 2 is a partial view of the side wall of the outer tub;

FIG. 3 is a schematic cross-sectional view of a part of the outer tub and a cooling water supply device;

FIG. 4 is a perspective view of a portion of the water separator and water inlet pipe;

fig. 5 is a side schematic view of main functional components of the dryer of the second embodiment.

[ detailed description ] of the invention

As shown in fig. 1, the dryer 1 of the first embodiment has a rotatable inner tub 2 accommodating laundry, and an outer tub 3 disposed around the inner tub 2. The inner tub 2 and the outer tub 3 are arranged substantially coaxially and axially substantially horizontally. The inner tub wall 21 has densely distributed first holes 22 so as to be spatially communicated with the outer tub 3. The rear end of the outer tub 3 is connected to an inlet 41 of the air passage 4. The outlet 42 of the air passage 4 is connected to a sealing ring 5 mounted at the front of the outer tub 3. This allows the air passage 4 to form a communicating space with the outer tub 3. A fan 6 and a heating device 7 are arranged in the air channel 4.

The cooling water supply device 8 is connected to a cylindrical side wall 31 of the outer tub 3. The cooling water supply means 8 has a set of horizontally arranged second holes 81 located on the side wall 31 of the outer tub 3. The cooling water supply device 8 further comprises a water inlet pipe 82 and a water separator 83 connected to the water inlet pipe 82. The water inlet pipe 82 is provided with a water valve 84 controlled by the control device 10. The control device 10 controls the water valve 84 to be opened during the drying process. The cooling water is buffered after entering the water separator 83 from the water inlet pipe 82 and then enters the outer tub 3 through the second hole 81.

As shown in fig. 3 and 4, the water separator 83 is installed at the outer side of the sidewall 31 of the outer tub 3 in a direction away from the inner tub 2. Wherein the water separator 83 comprises a water inlet 85 and a cover 86 covering the second hole 81. The cover 86 has a port 87 sealingly connected to the side wall 31 of the outer tub. A water storage chamber 80 having a cross-sectional area perpendicular to the water inlet direction larger than that of the water inlet 85 is formed between the cover 86 and the sidewall 31 of the outer tub.

Wherein the second hole 81 meets the upper, higher region 80a of the water storage chamber 80.

Wherein the total cross-sectional area of the second holes 81 is larger than the cross-sectional area of the water inlet 85 on the water separator 83.

As shown in fig. 1 and 2, the entire inner surface 30 of the outer tub 3 is prefabricated to have a hydrophobic property, and then hydrophilic treatment is performed under the water outlet area 810 where the second hole 81 is located, so that a hydrophilically treated first area 301 is formed under the water outlet area on the inner surface 30 of the sidewall 31 of the outer tub, and the remaining hydrophobic second area 302 of the inner surface 30 of the outer tub 3.

Wherein the hydrophilic treatment comprises at least one of spark etching, laser etching, spraying a hydrophilic coating, and plasma treatment.

Wherein the first region 301 is located at a lower position relative to the central axis 9 of the outer tub 3. Where the hydrophilic first region 301 is curved upwards. The cooling water supply means 8 is located near the level of the central shaft 9. The cooling water flows out of the second holes 81 and then flows onto the hydrophilic first region 301 by gravity, thereby forming a water film.

During the drying process, the control device 10 activates the fan 6 to circulate the process air for drying between the air passage 4 and the tub 3. The control device 10 also activates the heating device 7 to heat the process air passing through the air channel 4. The high-temperature process air enters the outer tub 3 and evaporates moisture in laundry after entering the inner tub 2 disposed in the outer tub 3. The cooling water supply device 8 supplies cooling water into the tub 3. The high temperature and high humidity process air exchanges heat with the cooling water film while passing through the first region 301. The process air temperature drops and entrained moisture condenses into water which is separated from the process air. The dried process air enters the air channel 4 and is reheated for the next cycle. So that the moisture in the laundry is gradually dried.

The cooling water supply devices 8 may be provided at both sides of the outer tub 3, respectively.

In the second embodiment shown in fig. 5, the inner tub 200 and the outer tub 300 of the dryer 100 are disposed obliquely upward. The rear wall 320 of the tub 300 is provided with a cooling water supply device 801. The cooling water supply device 801 has the same or similar structure as the cooling water supply device 8 of the first embodiment, and includes, for example, a water separator 830, a water inlet pipe, a second hole 811 provided in the rear wall 320 of the outer tub, and the like, and the structural features of the water separator 830 are also the same.

The inner surface 3002 of the rear wall 320 of the outer tub has a hydrophilically treated first area 303 below the water outlet area 8100 of the cooling water supply 801. Wherein the first region 303 is upwardly inclined to facilitate the flow of water downwardly along the surface of the region. The remainder of the inner surface 3000 of the outer barrel 300 is the hydrophobic second region 304.

The various embodiments described above and shown in the figures are only illustrative of the invention. Any modification of the present invention by one of ordinary skill in the related art is within the scope of the basic technical idea of the present invention.

Claims

1. The utility model provides a clothes dryer, contains the interior bucket that holds the clothing and around the outer bucket that interior bucket set up, has densely distributed's first hole on the interior bucket wall to communicate its characterized in that with outer bucket space: the outer barrel wall is provided with a plurality of second holes, a water outlet area defined by the second holes horizontally extends, the outer side of the outer barrel wall, which is far away from the inner barrel direction, is provided with a water separator, wherein the water separator comprises a water inlet and a cover for covering the second holes, the cover is provided with a port which is in sealing connection with the outer barrel wall, a water storage cavity with the cross section area perpendicular to the water inlet direction and larger than the cross section area of the water inlet is formed between the cover and the outer barrel wall, the water outlet area is connected with a higher upper area of the water storage cavity, and the total cross section area of the second holes is larger than the cross section area of the water inlet on the water separator.

2. The clothes dryer of claim 1 wherein: the inner barrel and the outer barrel are cylindrical, are axially horizontally or obliquely arranged, and the water separator is arranged on the side wall and/or the rear wall of the outer barrel.

3. The clothes dryer of claim 2 wherein: the inner barrel and the outer barrel are axially and horizontally arranged, the water separator is arranged on the side wall of the outer barrel, and the water outlet area is close to or lower than the horizontal plane where the central shaft of the barrel is positioned.

4. The clothes dryer of claim 1 wherein: the inner surface of the outer barrel wall is provided with a first area which is subjected to hydrophilic treatment and a second area which is hydrophobic.

5. The clothes dryer of claim 4 wherein: the hydrophilic treatment includes at least one of spark etching, laser etching, spraying a hydrophilic coating, and plasma treatment.

6. The clothes dryer of claim 1 wherein: the water separator is connected with a water inlet pipe, a water valve controlled by a control device is arranged on the water inlet pipe, and the control device is used for controlling the water valve to be opened in the process of executing a drying program.

7. The clothes dryer of claim 6 wherein: comprises a fan and a heating device which are in operable communication with the drying space surrounded by the outer tub, wherein the fan and the heating device are controlled by the control device to be turned on during the process of executing the drying program by the control device.