CN108691175B

CN108691175B - Clothes dryer

Info

Publication number: CN108691175B
Application number: CN201810652170.6A
Authority: CN
Inventors: 张辉; 庞文峰; 张秀华
Original assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2014-07-24
Filing date: 2014-07-24
Publication date: 2020-11-27
Anticipated expiration: 2034-07-24
Also published as: CN105463805A; CN108691175A; CN105463805B

Abstract

The invention discloses a clothes dryer, which comprises a drying barrel, a condensing device, a second air circulation passage and a heating device, wherein the condensing device is communicated with the space of the drying barrel and is positioned in a first air circulation passage, a first fan for promoting the air to circulate in the first air circulation passage is arranged on the first air circulation passage, the second air circulation passage comprises a second air circulation passage communicated with the drying barrel, a second fan for promoting the air to circulate in the second air circulation passage is arranged on the second air circulation passage, and the heating device is used for heating the air in the second air circulation passage. Since the heating device and the second fan are independently provided in the second air circulation path, the circulation amount and/or the circulation speed of the air passing through the heating device can be greatly increased.

Description

Clothes dryer

[ technical field ] A method for producing a semiconductor device

The present invention relates to a dryer, and more particularly, to an air heating and condensing system of a dryer.

[ background of the invention ]

The existing dryer generally includes a drying tub, a condenser, a fan, and a heating device, which are connected to each other. As shown in fig. 1, dry air 12 enters condenser 16 from dry tub 14 under the action of process fan 10. The drying air 12 enters the air heating passage 18 after being condensed by the condenser 16. The heated drying air 12 re-enters the drying tub. The design of this prior dryer 1 requires a connecting channel between the condenser 16 and the process fan 10. Due to the limited space inside the dryer, the connection channel is affected by other associated components, such as the shape characteristics of the condenser and the fan, and has a complicated structure and a large flow resistance. Meanwhile, the amount of air passing through the air heating path 18 is limited by the air flow rate of the condenser 16. Therefore, the amount of air passing through the air heating passage 18 is limited in many ways, and the heating efficiency is not high. This affects especially the preheating speed during drying, and thus the drying efficiency.

In addition, the condenser 16 shown in fig. 1 is an air-cooled condenser. The condenser 16 includes therein a cooling passage 161 and a drying passage 162 which are substantially perpendicular to each other. The cooling air 22 of low temperature is introduced into the cooling passage 161 by the cooling fan 20, and the cooling air 22 is discharged to the outside again after heat exchange. The drying passage 162 is connected to the drying tub 14 in a circulating manner, so that the drying air 12 with high humidity and high heat from the drying tub enters the drying passage 162 in the condenser 16, wherein the drying air 12 exchanges heat with the cooling air 22 in the cooling passage 161, and moisture in the drying air 12 is condensed to form drying air 12 with low humidity and low heat. The now dry air 12 passes through the process fan 10 and into the air heating path 18 and then into the drying tub.

[ summary of the invention ]

An object of the present invention is to improve a heating efficiency of a dryer.

Aiming at the purposes, the technical scheme adopted by the invention is as follows: a clothes dryer comprises a drying barrel, a condensing device which is communicated with the space of the drying barrel and is positioned in a first air circulation path, a first fan which is arranged on the first air circulation path and is used for promoting the air to circulate in the first air circulation path, a second air circulation path which is communicated with the drying barrel and is provided with a second fan which is used for promoting the air to circulate in the second air circulation path, and a heating device which is used for heating the air in the second air circulation path, wherein the condensing device comprises a cooling air channel and a drying air channel, the cooling air channel and the drying air channel are mutually isolated and can be arranged in a heat exchange way, the first channel which introduces the cooling air from the ambient air outside the clothes dryer is connected with one end of the cooling air channel in the condensing device, the second channel is connected with the other end of the cooling air channel and the drying barrel, and a third channel is connected with one end of the drying barrel and one end of the drying, the fourth passage is connected to the other end of the drying air passage and is opened to the outside of the dryer.

The dryer may refer to various machines having a drying function, for example, a machine for purely drying laundry, or a washing and drying machine.

Because the heating device and the second fan are independently arranged in the second air circulation passage, and the air inlet of the second fan does not need to be connected with the condensing device through a pipeline, the structure of the air inlet of the second fan is greatly optimized, and the air circulation resistance is obviously reduced. Meanwhile, the air flow quantity of the second air circulation passage is not influenced and limited by the structure of the condensing device, and the air flow quantity and/or the air flow speed can be greatly improved. The heating power of the heating device can be improved after the air circulation quantity and/or the air circulation speed of the heating device are increased while the air heating temperature is ensured. Therefore, the heating speed of the air in the drying barrel, especially the preheating speed in the drying process, is obviously improved.

In addition, the condensing device with the structure enables the drying air to be directly discharged to the external environment after being condensed, and moisture contained in the drying air and not completely condensed cannot enter the drying barrel again, so that the drying speed is effectively improved. In addition, the cooling air in the environment is driven by the first fan and enters the condensing device, and the cooling air enters the drying barrel after being heated by heat exchange with the drying air with higher temperature from the drying barrel. Since the cooling air from the outside environment has a low humidity, it is possible to absorb a large amount of moisture from the laundry. At the same time, the heat of the drying air is at least partially transferred to the cooling air, so that the heat is effectively recovered.

As one of preferable improvements, the second air circulation passage is a circulation passage.

As one of preferable improvements, the heating device is provided downstream of the second fan.

As a possible development of the invention, the first air flow path and the second air flow path merge. Therefore, the connecting ports of the first air circulation passage and the second air circulation passage with the drying barrel can be reduced, and the air pipelines are reduced, so that the structure is simplified, the space is saved, and meanwhile, the material and the processing cost are saved.

As a further improvement of the present invention, the junction of the first air flow path and the second air flow path is located between the heating device and the drying tub and between the condensing device and the drying tub, and is downstream of the heating device and the condensing device in the air flow direction. The temperature of the air in the second air flow path after exiting the condensing means is lower than the temperature of the air in the first air flow path after passing the heating means. After the two paths of air are mixed at the junction, the air flow is increased, and the temperature is reduced. Therefore, on the premise of ensuring that the temperature of the air entering the drying barrel does not exceed the limit value, the heating power of the heating device can be further improved, and the heating speed of the air in the drying barrel is further improved.

As a preferred improvement, the first fan is disposed on any one of the first channel to the fourth channel. The position of the first fan is flexible, reasonable arrangement can be achieved according to actual space, design is flexible, and the machine is compact.

As a preferred improvement, the cooling air channel is arranged in parallel with the drying air channel. Compared with the cooling air channel and the drying air channel which are vertically arranged, the parallel arrangement makes the heat exchange more sufficient.

As a preferred improvement, the cooling air channel and the drying air channel respectively have a plurality of groups of channels arranged at intervals.

As a preferred improvement, the flow directions of the cooling air and the drying air in the cooling air channel and the drying air channel are the same.

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

[ description of the drawings ]

FIG. 1 is a schematic view of a prior art dryer air circulation system;

FIG. 2 is a schematic view of an air circulation system of a clothes dryer according to a first embodiment of the present invention;

fig. 3 is a schematic view of an air circulation system of a dryer according to a second embodiment of the present invention.

[ detailed description ] embodiments

As shown in fig. 2, the dryer 100 includes a drying tub 102 providing a drying space for laundry. First air circulation passage 104 and second air circulation passage 106 are connected to drying tub 102, respectively. Wherein the first air circulation path 104 is mainly used for condensing the drying air a1 in the drying tub 102; the second air circulation path 106 is mainly used for heating the drying air a1 in the drying tub 102.

The first air flow path 104 is provided with an air-cooling type condensing device 108. A cooling air channel 110 and a drying air channel 112 are arranged in the condensing unit 108, wherein the cooling air channel 110 and the drying air channel are parallel to each other and respectively consist of a plurality of groups of channels arranged at intervals. Cooling air passage 110 and drying air passage 112 are isolated from each other and are disposed heat-exchangeable. For example, the passage partition is made of a heat conductive metal material, and heat conductive metal fins are provided in the cooling air passage 110. A first channel 114 for introducing cooling air a2 from the ambient air outside dryer 100 is connected to first end 110a of cooling air channel 110 in condensing unit 108, a second channel 116 is connected to second end 110b of cooling air channel 110 and drying tub 102, a third channel 118 is connected to first end 112a of drying air channel 112 in condensing unit 108 and drying tub 102, and a fourth channel 120 is connected to second end 112b of drying air channel 112 and is open to the outside of dryer 100. A first fan 122 is connected to the first channel 114 to cause air to flow in the first air flow path 104 by: the cooling air a2 in the external environment enters the cooling air channel 110 in the condensing device 108 from the first channel 114 under the action of the first fan 122, is heated by heat exchange therein, is blown out of the condensing device 108, passes through the second channel 116, enters the drying tub 102, and is mixed with the drying air a1 therein; heated cooling air a2 enters drying tub 102, increasing the air pressure in the tub, causing drying air a1 in drying tub 102 to be blown out of third passageway 118 and along third passageway 118 into drying air passageway 112 in condensing unit 108. Due to the high temperature and high humidity of the drying air a1 at this time, heat exchange occurs with the cooling air a2 in the cooling air passage 110. The temperature of the drying air a2 is then lowered while the moisture therein is mostly condensed. The heat-exchanged low-temperature and low-humidity drying air a1 is blown to the environment outside the dryer 100 along the fourth path 120. The first fan 122 can be mounted on any of the first through fourth passageways 114 through 120 to perform the same function except for the mounting position shown in fig. 2.

As shown in fig. 2, the cooling air a2 and the drying air a1 both enter from the same side of the condensing unit 108 and exit from the other side in substantially the same flow direction within the condensing unit 108.

In order to heat drying air a1 inside drying tub 102 while balancing the amount of heat brought to the environment by drying air a1, heating device 124 is provided to heat the air inside drying tub 102. The heating device 124 is located in the second air flow path 106 independently of the first air flow path 104. Second air circulation path 106 is communicated with drying tub 102 and provided with a second fan 128 for causing air to circulate therein, thus forming a circulation path between drying tub 102, second fan 128 and heating device 124. Preferably, heating device 124 is disposed downstream of second fan 128, so that the hot air from heating device 124 directly enters drying tub 102, thereby reducing heat loss.

Since the heating device 124 and the second fan 128 are separately disposed in the second air circulation path 106, the air inlet of the second fan 128 does not need to be connected with the condensing device 108 by a pipeline, so that the air inlet structure of the second fan 128 is greatly optimized, and the air circulation resistance is significantly reduced. Meanwhile, the air flow rate of the second air circulation path 106 is not affected and limited by the structure of the condensation device 108, and the air flow rate and/or circulation speed can be greatly improved. The heating power of the heating device 124 may be increased after the air circulation amount and/or the circulation speed through the heating device 124 is increased while the air heating temperature is secured. The heating rate of the air in drying tub 102, especially the preheating rate during drying, is increased significantly.

In a second embodiment, shown in FIG. 3, the first air flow path 204 intersects the second air flow path 206. The junction 205 is located between the heating device 224 and the drying tub 202 and between the condensing device 208 and the drying tub 202, and is located downstream of the heating device 224 and the condensing device 208 in the air circulation direction. Thus, the temperature of the air exiting the condensing device 208 in the second air flow path 206 is lower than the temperature of the air passing the heating device 224 in the first air flow path 204. The air flow increases and the temperature decreases after the two air paths are mixed at the junction 205. Therefore, on the premise of ensuring that the temperature of the air entering the drying tub 202 does not exceed the limit value, the heating power of the heating device 224 can be further increased, thereby increasing the heating speed of the air in the drying tub 202.

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 a drying tub (102, 202), condensing means (108, 208) in spatial communication with the drying tub and located in a first air flow path (104, 204), the first air flow path (104, 204) being provided with a first fan (122) for causing air to flow therethrough, characterized in that: comprising a second air circulation path (106, 206) communicating with the drying tub (102, 202), the second air circulation path (106, 206) being provided with a second fan (128) for causing air to circulate therethrough, and heating means (124, 224) for heating air in the second air circulation path (106, 206), the condensing means (108, 208) comprising a cooling air passage (110) and a drying air passage (112), the cooling air passage (110) being separated from the drying air passage (112) and being arranged in a heat-exchangeable manner, a first passage (114) for introducing cooling air (A2) from ambient air outside the dryer (100) being connected to one end (110a) of the cooling air passage (110) in the condensing means (108), a second passage (116) being connected to the other end (110b) of the cooling air passage (110) and to the drying tub (102), a third passage (118) connecting the drying tub (102) to the drying air passage (112) in the condensing means (108) And a fourth passage (120) connected to the other end (112b) of the drying air passage (112) and opened to the outside of the dryer (100).

2. The clothes dryer of claim 1, wherein: the second air circulation passage (106, 206) is a circulation passage.

3. The clothes dryer of claim 2, wherein: the heating device (124) is disposed downstream of the second fan (128).

4. The clothes dryer of claim 1, wherein: the first air flow path (204) intersects the second air flow path (206).

5. The clothes dryer of claim 4, wherein: the junction (205) of the first air circulation path (204) and the second air circulation path (206) is located between the heating device (224) and the drying barrel (202) and between the condensing device (208) and the drying barrel (202), and is located downstream of the heating device (224) and the condensing device (208) according to the air circulation direction.

6. The clothes dryer of claim 1, wherein: the first fan (122) is arranged on any one of the first channel (114) to the fourth channel (120).

7. The clothes dryer of claim 1, wherein: the cooling air passage (110) is disposed in parallel with the drying air passage (112).

8. The clothes dryer of claim 7, wherein: the cooling air channel (110) and the drying air channel (112) are respectively provided with a plurality of groups of channels which are arranged at intervals.

9. The clothes dryer of claim 7, wherein: the cooling air (A2) and the drying air (A1) respectively flow in the same direction in the cooling air channel (110) and the drying air channel (112).