CN106192325B

CN106192325B - Electric clothes dryer

Info

Publication number: CN106192325B
Application number: CN201510213145.4A
Authority: CN
Inventors: 张琦; 徐永刚; 李茂银; 王永甲
Original assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Current assignee: Bo Xihua Electric Jiangsu Co Ltd; BSH Hausgeraete GmbH
Priority date: 2015-04-29
Filing date: 2015-04-29
Publication date: 2020-06-12
Anticipated expiration: 2035-04-29
Also published as: EP3088597A1; CN106192325A

Abstract

An electric dryer includes a tub to receive laundry, a condenser in communication with a space of the tub, the condenser having a common wall with the tub and the condenser having an annular air flow passage, and a fan to promote air flow from the tub to the condenser. Because condenser and bucket combine as an organic whole, it is compacter in the space, and annular airflow channel provides longer heat exchange stroke simultaneously, improves condensation efficiency. The rotating air flow causes the condensate water to be thrown against the wall of the annular air flow channel under the action of centrifugal force, so that the condensate water is not easily brought into the fan and the air heating device by the air flow.

Description

Electric clothes dryer

[ technical field ] A method for producing a semiconductor device

The invention relates to an electric clothes dryer, in particular to a condensing device of the clothes dryer.

[ background of the invention ]

Electric dryers usually comprise machines with pure dryer 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, the dry air is heated by the heating device to form dry hot air, then enters the clothes treatment barrel to exchange heat with wet clothes, takes away moisture in the clothes to form relatively humid hot air, the humid hot air then passes through the condensation action of the condensation device, the moisture in the humid 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.

There are many condensing methods used in the condensing device, and one of them is that water is used as a cooling medium to exchange heat with the drying air, so that the moisture in the hot air is condensed and separated from the air. Such condensation devices usually have a channel-like body to which cooling water pipes are connected. The damp and hot drying air passes through the condensing device body from bottom to top, and the cooling water flows out from top to bottom during the process, so that heat exchange is carried out between the damp and hot drying air and the cooling water. Generally, due to space limitation, the height of the condensing device body is limited, and the stroke of heat exchange between the damp and hot air and the cooling water is short. In addition, the hot and humid air traveling upward at high speed blows off water flow when meeting with the cooling water, and even tends to blow water droplets into the fan and the air heating device. In addition, since the condenser occupies a certain space, it is necessary to compress the space of the laundry treating tub in a limited space.

[ summary of the invention ]

An object of the present invention is to provide an electric dryer which is compact in structure while the heat exchange effect of a condenser is better and cooling water is not easily blown into a fan and an air heating device.

Aiming at the purposes, the technical scheme adopted by the invention is as follows: an electric dryer includes a tub for containing laundry, a condenser in communication with a space of the tub, the condenser having a common wall with the tub and the condenser having an annular air flow passage, and a fan for promoting air flow from the tub to the condenser.

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

Compared with the prior art, the condenser and the barrel are combined into a whole, so that the space is more compact, meanwhile, the annular airflow channel provides a longer heat exchange stroke, and the condensing efficiency is improved. The rotating air flow causes the condensate water to be thrown against the wall of the annular air flow channel under the action of centrifugal force, so that the condensate water is not easily brought into the fan and the air heating device by the air flow.

As a preferred improvement, the tub comprises a substantially cylindrical peripheral wall, and the tub is disposed substantially horizontally or obliquely along its axis, and the common wall of the condenser and the tub is located on the peripheral wall of the tub and above the tub axis. Since the peripheral wall of the tub is cylindrical, a space that can be utilized exists between the peripheral wall and the box body. This improvement utilizes just this space to maximize the space between the drum and the condenser within the limited tank space.

As a possible modification of the present invention, the annular air flow passage is located in a space formed by the outer wall of the condenser and the arc-shaped can peripheral wall obliquely above the can axis and gradually increased in the vertical direction due to the downward bending of the can peripheral wall. The space is usually vacant in the clothes dryer or is rarely completely occupied by other components, and the arrangement makes more skillful use of the space. Meanwhile, the sunken space provides a relatively sufficient vertical space for the annular airflow channel, so that the airflow is fully sunken in the annular airflow channel, and a longer heat exchange stroke is realized.

As a further improvement of the invention, the condenser comprises an air inlet channel, the air inlet channel is communicated with the annular airflow channel and is positioned at the upstream of the annular airflow channel, and the condenser comprises a cooling water inlet which is positioned in the air inlet channel. Therefore, the cooling water is blown away by the airflow in the air inlet channel and mixed with the airflow, so that the heat exchange stroke in the annular airflow channel can be more fully utilized.

As a further improvement of the invention, the air inlet of the air inlet channel is arranged on the peripheral wall of the barrel, and the air inlet of the air inlet channel and the cooling water inlet are respectively positioned at two sides of the ridge part of the barrel corresponding to the vertical upper part of the shaft of the barrel. So that the cooling water is not easily introduced into the tub from the air inlet to wet the laundry therein.

As a further improvement of the invention, the condenser comprises an air inlet channel, the air inlet channel is communicated with the annular airflow channel and is positioned at the upstream of the annular airflow channel, and the flow section of the air inlet channel is gradually reduced along the gas flow direction. The air inlet channel can increase the speed of air flow entering the annular air flow channel and enhance the heat exchange effect.

As a further development of the invention, the condenser comprises a cooling water inlet which is close to the narrowest point of the flow cross-section of the inlet channel. The cooling water inlet is located near the region where the air velocity is greatest, which facilitates the cooling water to be blown off as small droplets and better mixed with the air flow. Meanwhile, the centrifugal force generated by the large air flow speed in the annular air flow channel is also large, so that condensed water is separated from air and attached to the channel wall, and the condensed water is prevented from entering the fan.

As a further improvement of the present invention, the intake passage extends substantially horizontally.

As a further improvement of the invention, a straight airflow channel is arranged in the middle of the annular airflow channel, the wall of the straight airflow channel forms the inner wall of the annular airflow channel, the inlet of the straight airflow channel is positioned at the bottom of the straight airflow channel and communicated with the annular airflow channel, and the outlet of the straight airflow channel is positioned at the top of the straight airflow channel and communicated with the fan. The air current descends to the bottom and gets into straight air current passageway after rotatory along annular air current passageway, and the air current route of so circuitous further reduces and even avoids the comdenstion water to get into the fan, also makes the condensation more abundant simultaneously.

As a further improvement of the invention, the walls of the straight gas flow passages are of cylindrical configuration, thereby providing for smoother rotation of the gas flow in the annular gas flow passage.

As a further improvement of the invention, the inlet of the annular gas flow channel is close to the top of the annular gas flow channel. The air current gets into straight air current passageway from the bottom after getting into annular air current passageway from higher position, and the air current rotation descends, increases heat exchange formation, improves the condensation effect.

As a further improvement of the invention, the inlet of the annular gas flow channel is arranged in the tangential direction of the annular gas flow channel. The high-speed airflow entering from the tangential direction is beneficial to forming rotating airflow in the annular airflow channel, and the resistance is reduced.

As a further improvement of the invention, a condensed water outlet is arranged on the barrel wall at the bottom of the annular airflow channel. So set up and prevent ponding. The condensed water is discharged from the bucket through a drainage device.

As a further development of the invention, the annular gas flow channel comprises a cylindrical outer wall and a cylindrical inner wall. The annular passage between the outer cylindrical wall and the inner cylindrical wall presents a low resistance to gas flow therethrough.

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

[ description of the drawings ]

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

FIG. 2 is a schematic cross-sectional view of a dryer tub, condenser and fan;

fig. 3 is a sectional view taken along a-a in fig. 2.

[ detailed description ] embodiments

As shown in fig. 1 to 3, the dryer has an inner tub 1 and an outer tub 2 which are coaxial and spatially communicated. The inner barrel 1 is rotatably mounted in the outer barrel 2. The laundry to be dried is loaded in the inner tub 1 and is gradually dried by the hot air introduced into the outer tub 2.

The inner tub 1 and the outer tub 2 are installed substantially horizontally in the axial direction thereof. The condenser 3 is provided on the peripheral wall 21 of the top of the tub 2. A fan 4 and an air heating passage 5 are connected in this order downstream of the condenser 3. The outlet of the air heating passage 5 communicates with the front end opening 22 of the outer tub 2. Thus, an air circulation path is formed in the tub 2, the condenser 3, the fan 4, and the air heating passage 5.

The condenser 3 comprises an outer wall 31. The outer wall 31 and the substantially cylindrical peripheral wall 21 of the outer tub 2 together enclose a condensation channel 32. The condensation passage 32 includes an intake passage 34 and an annular airflow passage 35 downstream of the intake passage 34. The intake passage 34 communicates with an annular gas flow passage 35.

The annular airflow passage 35 is located in a space formed by the condenser outer wall 31 and the arc-shaped tub peripheral wall 21 and formed obliquely above the shaft 22 of the tub 2 and gradually increased in the vertical direction due to the downward bending of the tub peripheral wall 21.

As shown in fig. 1 and 2, the intake passage 34 extends substantially horizontally, and has a flow cross section that gradually decreases in the gas flow direction. The cooling water inlet 36 is located in the inlet channel 34 near the narrowest point of the flow cross-section of the inlet channel 34. The air inlet 33 of the air inlet channel 34 is disposed on the peripheral wall 21 of the outer tub, and the air inlet 33 and the cooling water inlet 36 of the air inlet channel are respectively located at two sides of the ridge 23 of the outer tub corresponding to the vertical upper part of the shaft 22 of the outer tub 2.

The annular passage 35 includes a cylindrical outer wall 351 and a cylindrical inner wall 352. Wherein the outer wall 351 is part of the condenser housing 31. The interior of the inner wall 352 forms a straight airflow channel 37. The inlet 371 of the straight gas flow channel 37 is located at the bottom thereof and communicates with the annular gas flow channel 35; the outlet 372 of the straight air flow channel 37 is located at the top thereof and communicates with the fan 4.

The inlet 353 of the annular air flow passage 35 is located near the top thereof and is oriented tangentially to the annular air flow passage 35. The inlet 353 of the annular air flow passage 35 is connected to the air intake passage 34.

A condensed water drain port 38 is provided on the bottom tub peripheral wall 21 of the annular air flow passage 35, so that the condensed water is drained from the condensed water drain port 38 into the tub 2.

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. An electric clothes dryer comprising a tub (2) for containing clothes, a condenser (3) in communication with a space of the tub, and a fan (4) for promoting air flow from the tub to the condenser, characterized in that: condenser (3) and bucket (2) have common wall (21), and condenser (3) have annular airflow channel (35), condenser (3) contain inlet channel (34), and inlet channel (34) communicate with each other with annular airflow channel (35), and are located annular airflow channel (35) upstream, and the circulation cross-section of inlet channel (34) diminishes along gas flow direction gradually, condenser (3) contain cooling water inlet (36), cooling water inlet (36) are close to the narrowest department of the circulation cross-section of inlet channel (34).

2. The electric clothes dryer of claim 1, wherein: the tub (2) comprises a substantially cylindrical peripheral wall (21), and the tub (2) is arranged substantially horizontally or obliquely along its axis (22), the common wall (21) of the condenser (3) and the tub (2) being located on the tub peripheral wall (21) and above the tub axis (22).

3. The electric clothes dryer of claim 2, wherein: the annular air flow channel (35) is positioned in a space which is formed by the condenser outer wall (31) and the arc-shaped barrel peripheral wall (21) and is formed above the barrel shaft (22) in an inclined mode, and the space is gradually enlarged in the vertical direction due to the downward bending of the barrel peripheral wall (21).

4. The electric clothes dryer of claim 1, wherein: the condenser (3) comprises an air inlet channel (34), the air inlet channel (34) is communicated with the annular airflow channel (35) and is positioned at the upstream of the annular airflow channel, the condenser comprises a cooling water inlet (36), and the cooling water inlet (36) is positioned in the air inlet channel (34).

5. The electric clothes dryer of claim 4, wherein: the air inlet (33) of the air inlet channel (34) is arranged on the peripheral wall (21) of the barrel, and the air inlet (33) and the cooling water inlet (36) of the air inlet channel are respectively positioned at two sides of the barrel ridge part (23) which is vertically above the shaft (22) of the barrel (2) and corresponds to the upper part.

6. The electric dryer of any one of claims 4-5, characterized in that: the intake passage (34) extends substantially horizontally.

7. The electric clothes dryer of claim 1, wherein: the middle of the annular airflow channel (35) is provided with a straight airflow channel (37), the wall (352) of the straight airflow channel forms the inner wall (352) of the annular airflow channel, the inlet (371) of the straight airflow channel is positioned at the bottom of the straight airflow channel and communicated with the annular airflow channel (35), and the outlet (372) of the straight airflow channel is positioned at the top of the straight airflow channel and communicated with the fan (4).

8. The electric clothes dryer of claim 7, wherein: the wall (352) of the straight air flow channel (37) is of a cylindrical structure.

9. The electric clothes dryer of claim 7, wherein: the inlet (353) of the annular gas flow channel (35) is close to the top of the annular gas flow channel (35).

10. The electric clothes dryer of claim 9, wherein: the inlet (353) of the annular airflow channel (35) is arranged in the tangential direction of the annular airflow channel (35).

11. The electric clothes dryer of claim 1, wherein: a condensed water outlet (38) is arranged on the barrel wall (21) at the bottom of the annular airflow channel (35).

12. The electric clothes dryer of claim 1, wherein: the annular gas flow passage (35) includes a cylindrical outer wall (351) and a cylindrical inner wall (352).