CN113718499A

CN113718499A - Drying device and drying method

Info

Publication number: CN113718499A
Application number: CN202010447766.XA
Authority: CN
Inventors: 陈小平; 张宝鸽; 李宁宁; 徐锦锋; 姚庆辉; 刘军
Original assignee: Yunmi Internet Technology Guangdong Co Ltd
Current assignee: Yunmi Internet Technology Guangdong Co Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-11-30
Anticipated expiration: 2040-05-25
Also published as: CN113718499B

Abstract

The invention relates to a drying device, comprising: the roller drying cylinder comprises an outer cylinder which is fixedly arranged, and a rotatable inner cylinder which is arranged in the outer cylinder; the inner cylinder is used for accommodating the objects to be dried; the inner barrel wall is provided with a plurality of through holes so as to communicate the space between the inner barrel and the outer barrel; an air inlet duct connected with the outer tub for supplying dry hot air for drying to the outer tub; the air inlet pipeline is arranged at the lower part of the outer cylinder, and dry hot air is blown out from the lower part of the outer cylinder to form an upward drying air flow; during drying, the object to be dried which falls after rotation moves oppositely and is contacted with the drying airflow so as to dry the object to be dried in the inner cylinder; thereby enhancing the contact between the drying airflow and the drying object, enhancing the drying effect and shortening the drying time; meanwhile, the invention also relates to a drying method of the drying device.

Description

Drying device and drying method

Technical Field

The invention relates to the technical field of drying for a dryer, in particular to a drying device and a drying method.

Background

At present, the utilization rate of dryers (clothes dryers, washing and drying integrated machines) is increasing, especially drum dryers (drum washing and drying integrated machines) are also daily household appliances of many families, but the drying efficiency of dryers is poor, the drying time is long, and sometimes there is a problem that local undried exists, which is related to the airflow direction of the drying airflow of dryers entering the inner drum containing the clothes to be dried, the prior art (such as drum dryers) usually adopts the method that the air enters the inner drum from the drum door seal, after the air enters the inner drum, the axial airflow is generated after passing through the door glass, the airflow direction is perpendicular to the drum rolling direction, which causes the falling direction of the clothes to be perpendicular to the airflow direction, which is not beneficial to the contact of the airflow and the clothes, the effect of drying airflow can not be fully exerted, which causes the drying effect to be poor, so that a drying device capable of fully exerting the airflow effect is urgently needed, which can fully contact the clothes, improve drying efficiency, shorten the stoving time.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a drying device and a drying method.

The technical scheme of the invention is summarized as follows:

in one aspect, the present invention provides a drying apparatus, comprising:

the roller drying cylinder comprises an outer cylinder which is fixedly arranged, and a rotatable inner cylinder which is arranged in the outer cylinder; the inner cylinder is used for accommodating objects to be dried; the inner barrel wall is provided with a plurality of through holes so as to communicate the space between the inner barrel and the outer barrel;

an air inlet duct connected with the outer tub for supplying dry hot air for drying to the outer tub;

the air inlet pipeline is arranged at the lower part of the outer cylinder, and dry hot air is blown out from the lower part of the outer cylinder to form an upward drying air flow; during drying, the object to be dried which falls after rotation moves oppositely and contacts with the drying airflow so as to dry the object to be dried in the inner cylinder.

Preferably, the bottom of the outer cylinder is provided with a bottom opening, the air inlet pipeline comprises a bottom pipeline connected to the bottom opening and hermetically connected with the bottom opening, so that the drying airflow flowing out of the air inlet flows into the drying cylinder from the bottom opening, and the air inlet can be opened or closed.

Preferably, the air conditioner further comprises an adjusting mechanism for adjusting the air inlet so that the air inlet can supply air flow with an adjustable angle with the vertical direction.

Preferably, the bottom duct is rotatably connected to the bottom opening as an adjusting mechanism, so that the air inlet feeds an air flow which forms an adjustable angle with the vertical direction, and the air flow can be adjusted to different falling positions of the object to be dried generated by forward/reverse rotation of the inner cylinder.

Preferably, the air inlet comprises a first air inlet and a second air inlet which are arranged along the circumferential direction, and the first air inlet and the second air inlet are symmetrically arranged on the vertical shaft section of the outer cylinder and are used for respectively providing drying air flow towards the falling position of the object to be dried from bottom to top when the inner cylinder rotates forwards or reversely; when the inner cylinder rotates forwards or backwards, the first air inlet/the second air inlet can be opened to provide relative drying air flow.

Preferably, a first bottom pipe and a second bottom pipe corresponding to the first air inlet and the second air inlet are included, and the first bottom pipe/the second bottom pipe can rotate, so that the first air inlet/the second air inlet can supply air flow with an adjustable angle with the vertical direction.

Preferably, when the inner drum rotates forwards/backwards, the angle of the second air inlet/the first air inlet can be opened and adjusted to provide air flow towards the falling position of the objects to be dried.

Preferably, the air inlet comprises one or more air inlets arranged along the axial direction of the side wall of the outer barrel.

Preferably, the drying device further comprises an air outlet pipe connected with the outer barrel so as to discharge the hot and humid air dried in the drying barrel out of the drying barrel.

Preferably, the drying machine further comprises a drain pipe connected with the outer drum, so that condensed water generated in the drying drum is drained through the drain pipe.

The invention also provides a drying method for the drying device, which comprises the following steps: rotating the inner cylinder to enable the objects to be dried in the inner cylinder to rotate and to fall freely when the objects rotate to a high position; the air inlet pipeline supplies drying air, flows out from the air inlet and provides drying airflow from bottom to top to the objects to be dried in the inner cylinder.

Preferably, the angle of the air inlet is adjustable, and the angle of the air inlet is adjusted after air inlet so as to face to the falling position of the object to be dried in forward rotation/reverse rotation.

Preferably, the air inlets are a first air inlet and a second air inlet which are circumferentially arranged, and the first air inlet and the second air inlet are symmetrically arranged on a vertical shaft section of the outer barrel; when the inner cylinder rotates forwards, the first air inlet is opened to provide a bottom-to-top drying airflow to the falling position of the object to be dried rotating forwards; when the inner cylinder rotates reversely, the second air inlet is opened to provide drying airflow from bottom to top to the falling position of the object to be dried.

Preferably, the first air inlet and the second air inlet are opened simultaneously, when the inner cylinder rotates forwards, the first air inlet faces upwards and vertically to the object to be dried, and the angle of the second air inlet is adjusted to face the object to be dried; when the inner barrel rotates reversely, the second air inlet faces upwards to the object to be dried vertically, and the angle of the first air inlet is adjusted to face the object to be dried.

Compared with the prior art, the invention has the beneficial effects that:

according to the drying device and the drying method provided by the invention, the air inlet is formed in the lower part of the outer cylinder, so that the air inlet pipeline can provide an air flow from bottom to top into the drying cylinder, and the air flow is just opposite to the falling direction of the objects to be dried (clothes) in the rotating process; furthermore, two air inlets are arranged, the angle of the air inlets can be adjusted, various conditions of falling position changes of clothes caused by forward rotation, reverse rotation and clothes condition changes can be met, and a better air flow direction is provided, so that the drying efficiency is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic view of an air intake structure of a drying apparatus in the prior art;

FIG. 2 is a schematic structural diagram of an air intake mode of the drying apparatus of the present invention;

FIG. 3 is a schematic view of a front view of the drying apparatus according to the present invention, showing the air intake direction opposite to the falling direction of the clothes;

FIG. 4 is a schematic structural view of an outer tub of the drying apparatus of the present invention;

FIG. 5 is a schematic view of a front view of the air inlet angle adjustment during the forward rotation of the inner cylinder of the drying apparatus of the present invention;

FIG. 6 is a schematic view of a front view of the air inlet angle adjustment during the reverse rotation of the inner drum of the drying apparatus of the present invention;

FIG. 7 is a front view of the drying apparatus according to the present invention, illustrating a first air inlet opened when the inner cylinder rotates forward;

FIG. 8 is a front view of the drying apparatus according to the present invention, illustrating a second air inlet opened when the inner drum is rotated reversely;

FIG. 9 is a schematic view of a front view of the second air inlet opening during the forward rotation of the inner cylinder of the drying apparatus of the present invention;

FIG. 10 is a front view of the drying apparatus according to the present invention, illustrating a first air inlet opened when the inner drum is rotated reversely;

FIG. 11 is a schematic view of a front view structure for adjusting angles of two air inlets when an inner cylinder of the drying apparatus rotates forwards;

FIG. 12 is a schematic view of a front view of the inner drum of the drying apparatus of the present invention for adjusting the angles of two air inlets when the inner drum rotates reversely;

fig. 13 is a flow chart of the drying method of the present invention.

Description of reference numerals:

1-a drying device; 2-inner cylinder; 21-a through hole; 3-outer cylinder; 31-the bottom of the outer cylinder; 32-bottom opening; 4-an air inlet pipeline; 41-air inlet; 42-bottom pipe; 43-a fan; 44-a heating device; 411-a first air inlet; 412-a second intake vent; 421-a first bottom pipe; 422-a second bottom pipe; 5-air outlet pipe; 6, a drain pipe; and 7, a door body.

Detailed Description

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1, a drying apparatus 1, such as a drum dryer and a drum washing and drying integrated machine, generally includes a drying drum (outer drum, rotatable inner drum) and an air inlet duct, and air is introduced into the drying drum from the air inlet duct to dry clothes; as shown in fig. 1, a basic schematic diagram of an air intake mode structure of a drying device in the prior art is shown, the air intake mode adopted in the prior art is that air is taken in at a door sealing position of a door body 7, then the direction is changed through the reflection of glass of the door body 7, the air basically advances at an axial position of the drying cylinder, and clothes rotate in the inner cylinder and fall out at a high position, and the falling direction of the clothes is vertical to the air intake direction, which is not beneficial to drying the clothes.

The invention provides a drying device 1, as shown in fig. 2 and 3, aiming at the problems of the prior art, providing a drying air inlet direction from bottom to top to achieve a better drying effect, specifically comprising: the roller drying cylinder comprises an outer cylinder 3 which is fixedly arranged, and a rotatable inner cylinder 2 which is arranged in the outer cylinder 3; the inner drum 2 is used for containing objects to be dried (clothes and trousers are shown in the figure); the wall of the inner cylinder 2 is provided with a plurality of through holes 21 so as to communicate the space between the inner cylinder 2 and the outer cylinder 3, and especially the air at the bottom of the outer cylinder 3 can flow to the inner cylinder 2; an air inlet duct 4 connected to the outer tub 3 for supplying dry hot air for drying to the outer tub 3; the air inlet pipeline 4 is arranged at the lower part of the outer cylinder 3, and dry hot air is blown out from the lower part of the outer cylinder 3 to form an upward drying air flow; during drying, the object to be dried which falls after rotation moves oppositely and contacts with the drying airflow so as to dry the object to be dried in the inner cylinder 2; the dry hot air enters the inner barrel 2 from bottom to top through the through holes 21, and in the rotating process, the objects to be dried (clothes) fall from top to bottom, the moving directions of the objects to be dried (clothes) and the objects to be dried are opposite, so that the drying contact area and the action effect are fully improved, the drying time is finally shortened, and the drying is relatively uniform; it should be understood that the air inlet duct 4 is disposed at the lower portion of the outer tub, and can generate an upward hot air flow, so as to generate a relative operation effect on the falling objects to be dried, and improve the drying effect. The source of the dry hot air can enter the drying cylinder in the modes of heat pump type, condensing type, hot air direct discharging type and the like in the prior art, and how to heat the dry hot air also correspondingly adopts the heating modes corresponding to the modes, such as a heater, a heat pump and the like; in addition, in order to enhance the air circulation, a fan or other devices can be used, as shown in fig. 2, a hot air direct exhaust type is adopted, an air inlet pipeline is used for air inlet from the outside, a heating wire 44 and a fan 43 are arranged, of course, a condensing type also has similar devices, only air circulates inside, and a heat pump type is used for heating air in a heat pump; in order to enhance the air strength of the air inlet pipeline 4 at the lower part of the outer cylinder, a small fan can be arranged on the air inlet pipeline close to the air inlet.

In some embodiments, as shown in fig. 5 and 6, because the rotation direction of the inner drum (dotted line) has forward rotation and reverse rotation, and during the rotary drying, the clothes do not fall off until reaching the highest point, but generally fall off along the inner drum wall before approaching the highest point, i.e. the forward rotation and the reverse rotation can generate two different falling positions, in order to further improve the drying efficiency, the positions of the air inlet and the falling direction need to be adjusted; an adjusting mechanism is needed for adjusting the air inlet 41, so that the air inlet 41 can supply airflow with an adjustable angle with the vertical direction, the drying state of different clothes falling positions is met, it needs to be pointed out that the falling positions can be influenced by forward and reverse rotation, the falling positions are influenced by the rotating speed and the weight of the clothes, and the angle of the air inlet can be adjusted by the adjusting mechanism according to the influencing factors; the adjusting mechanism can be a variable guide plate arranged at the air inlet of the air inlet 41, or a rotatable design is made on a part of the air inlet pipe close to the air inlet 41 as the adjusting mechanism; the following embodiments are explained by taking the air inlet pipe as an example, and accordingly, similar technical effects can be obtained in embodiments using other adjusting mechanisms such as a baffle plate.

The adjusting mechanism can be a bottom pipeline 42 rotatably connected with the bottom opening 32, so that the air inlet 41 is used for supplying air flow with an adjustable angle with the vertical direction, and the air flow can be adjusted to different falling positions of the objects to be dried generated by forward rotation/reverse rotation towards the inner cylinder; for example, as shown in fig. 5, when the front view of the drying device is taken, the inner drum rotates clockwise, and at this time, the laundry drops at a position on the inner drum that is deviated to the left, the air inlet 41 can be adjusted to deviate to the left to face a position where the laundry begins to drop, so as to improve the drying efficiency; similarly, as shown in FIG. 6, the inner drum is reversed (counterclockwise), and the laundry begins to fall off the right position of the inner drum, so that the air inlet 41 can be adjusted to be shifted to the right. Specifically, the dropping position of the clothes is generally related to the drying rotation speed, the weight of the clothes, and other factors, so in a specific manner, the angle to be adjusted can be experimentally measured according to the above factors to form a data table or a functional relationship, so that the angle can be adjusted for the specific rotation speed and the weight of the clothes in the actual drying.

In some embodiments, as shown in fig. 7 and 8, as another example for improving the relative relationship between the air inlet and the falling position of the clothes, a plurality of air inlets may be provided; from the practical application point of view, a left air inlet aiming at forward rotation and a right air inlet aiming at reverse rotation can be generally arranged; specifically, the air inlets include a first air inlet 411 and a second air inlet 412 which are arranged along the circumferential direction, the first air inlet 411 and the second air inlet 412 are symmetrically arranged along the vertical axis section of the outer barrel, that is, the bottommost end of the outer barrel may be respectively arranged towards two circumferential sides, the whole is still located at the lower part of the outer barrel, and the first air inlet 411 or the second air inlet 412 is closer to the vertical position where the clothes fall; the lowest end of the washing and drying integrated machine is generally a water outlet, so that the design of two air inlets of the first air inlet 411 and the second air inlet 412 is adopted, the actual requirement is better met, and the drying air flow towards the falling position of the object to be dried from bottom to top is respectively provided when the inner cylinder 2 rotates forwards or backwards; when the inner barrel 2 rotates forwards or backwards, the first air inlet 411/the second air inlet 412 can be opened to provide relative drying air flow; specifically, the two air inlets are symmetrically arranged at the left and right, as shown in fig. 7, when the clothes are rotated forward, the clothes fall in the left direction, and at this time, the first air inlet 411 at the left side can be opened; as shown in fig. 8, when the clothes are turned over, the clothes fall off in the right direction, and the right second inlet 412 can be opened.

In some embodiments, as shown in fig. 9 and 10, the wind inlets are disposed toward the rotation axis of the tub, and then the first wind inlet 411/the second wind inlet 412 supply the drying air in a radial direction; that is, when the fan rotates forward, the second air inlet 412 is opened to supply the drying air from the lower right to the upper left; when the rotation is reversed, the first air inlet 411 is opened, and the dry air is supplied from the lower left to the upper right.

In some embodiments, as shown in fig. 11 and 12, in the case of providing a plurality of air intakes, further, a rotatable structure may be provided, and in particular, a first bottom duct 421 and a second bottom duct 422 corresponding to the first air intake 411 and the second air intake 412, and the first bottom duct 421/the second bottom duct 422 may be rotated, so that the first air intake 411/the second air intake 412 can supply air flow at an adjustable angle to the vertical direction to adapt to the dropping position of the clothes.

In some embodiments, when the inner drum rotates forward/backward, the second/first wind inlets 412/411 are opened and the wind inlet angle is adjusted to provide an air flow toward the falling position of the object to be dried; as shown in fig. 11, when the clothes are rotated forward, the clothes fall to the left, and the first air inlet 411 on the left and the second air inlet 412 on the right can both adjust the angle, so that the air flow blows to the position where the clothes fall, specifically, as shown in fig. 11, since the first air inlet 411 is arranged on the left and is vertically arranged, no adjustment is needed, and the second air inlet 412 on the right can rotate by a certain angle as required; when reversed, as shown in FIG. 12, the related manner is similar to that of FIG. 11, and the discussion of the first intake vent 411 and the second intake vent 412 is reversed, and will not be repeated. In particular, the two air inlets may be adjusted in some embodiments in such a way that one air inlet pipe passes through the outer cylinder and is divided into two air inlets on the left and right sides in the outer cylinder, and the first bottom pipe 421/second bottom pipe 422 is on the wall of the outer cylinder but in the outer cylinder.

In some embodiments, as shown in fig. 4, the air inlet includes one or more air inlets arranged along the axial direction of the bottom of the outer drum, and the air inlets mentioned in the above embodiments only represent positions in the circumferential direction of the circular section of the drying drum, and each position can be arranged in the axial direction, so as to meet the requirement of axially distributing the internal laundry when the inner drum rotates, and achieve better drying effect.

In some embodiments, the drying machine further comprises an air outlet pipe 5 connected to the outer cylinder to discharge the hot and humid air dried in the drying cylinder out of the drying cylinder, in the direct hot air exhausting type drying machine, the air outlet pipe is arranged, and other modes (heat pump, condensation) determine whether the air outlet pipe is arranged according to requirements.

In some embodiments, the drying machine further comprises a drain pipe 6 connected to the outer tub, so that condensed water generated in the drying tub can be drained through the drain pipe, and the condensed water generated in the drying process can be drained through the drain pipe.

Specifically, in some embodiments, an air inlet pipe for air inlet from the door seal can be reserved, and a damper switch is correspondingly arranged at the air inlet of the door seal for switching the air inlet mode.

The invention is mainly applied to a drum-type dryer (washing and drying integrated machine), namely, clothes can fall off from the top by rolling, and the improvement of the dryer enables airflow to be from bottom to top, further improves the drying effect of the clothes and shortens the drying time. In the form of an all-in-one washer dryer, the drain pipe is also used for draining the laundry process.

The present invention provides a drying method of the above drying apparatus, as shown in fig. 13, including the steps of: rotating the inner drum 2 to enable the objects to be dried in the inner drum 2 to rotate and to fall freely when the objects rotate to a high place (specifically, the objects to be dried can be controlled by the weight and the rotating speed of the clothes); the air inlet pipe 4 supplies drying air, and the drying air flows out from the air inlet 41 to provide drying airflow from bottom to top to the objects to be dried in the inner cylinder 2, and accordingly, the advantages of the device are achieved, and the detailed description is omitted. Specifically, after drying starts, the inner drum rotates, the air inlet is opened after a certain time, the fan is opened, then the heater is opened, dry hot air at the air inlet blows towards falling clothes, specifically, the two air inlets can respectively supply air in a forward rotation/reverse rotation mode, and then the air inlet angle of the air inlet is adjusted according to the weight and the rotating speed of the clothes according to specific cases; and then, when the drying condition is reached, the heater is turned off, the fan is turned off, the drying is stopped, and the drying is finished.

In some embodiments, the air inlet angle of the air inlet 41 is adjustable, and the air inlet angle of the air inlet 41 is adjusted after air inlet, so as to face the falling position of the object to be dried in forward/reverse rotation; specifically, the angle is adjusted according to the weight and the rotating speed of clothes, or the air inlet is rotated at a specified angle, in the case of a single air inlet, for example, the air inlet angle of the air inlet can be controlled within the range of 5-15 degrees of left rotation in the forward rotation process, the air inlet angle of the air inlet can be controlled within the range of 5-15 degrees of right rotation in the reverse rotation process, and the angle of 0 degree is the vertical direction.

In some embodiments, the air intakes are a first air intake 411 and a second air intake 412; when the inner cylinder rotates forwards, the first air inlet is opened to provide a bottom-to-top drying airflow to the falling position of the object to be dried rotating forwards; when the inner cylinder rotates reversely, the second air inlet is opened to provide drying airflow from bottom to top to the falling position of the object to be dried.

In some embodiments, the angles of the two air inlets are adjustable, the air inlet angles of the air inlets are adjusted to face the falling position of the object to be dried in forward rotation/reverse rotation, and the specific two air inlets are adjusted; for example, when the air is rotated forward, the first air inlet 411 (left) can be adjusted by-5 to 5 degrees, and the second air inlet 412 (right) can be adjusted by 10 to 25 degrees; during the reverse rotation, the first air inlet 411 (left side) can be adjusted by 10-25 °, and the second air inlet 412 (right side) can be adjusted by-5 °.

In some embodiments, the first air inlet and the second air inlet can be opened simultaneously, when the inner cylinder rotates forwards, the first air inlet faces upwards and vertically towards the object to be dried (the first air inlet can be fixed), and the second air inlet adjusts the air inlet angle to face towards the object to be dried; when the inner barrel rotates reversely, the second air inlet faces upwards to the object to be dried (the second air inlet can be fixed), and the first air inlet adjusts the air inlet angle to face the object to be dried.

While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.

The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes in the figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

Claims

1. A drying apparatus, comprising:

the air inlet pipeline is arranged at the lower part of the outer cylinder, and dry hot air is blown out from an air inlet at the lower part of the outer cylinder to form an upward drying air flow; during drying, the object to be dried which falls after rotation moves oppositely and contacts with the drying airflow so as to dry the object to be dried in the inner cylinder.

2. The drying apparatus as claimed in claim 1, wherein the bottom of the outer tub defines a bottom opening, and the air inlet duct includes a bottom duct connected to the bottom opening and hermetically connected to the bottom opening, so that the drying airflow from the air inlet can flow into the drying tub through the bottom opening, and the air inlet can be opened or closed.

3. The drying apparatus of claim 2, further comprising an adjustment mechanism for adjusting the air inlet such that the air inlet is capable of supplying an air stream at an adjustable angle to vertical.

4. The drying device of claim 2, wherein the air inlet comprises a first air inlet and a second air inlet which are arranged along the circumferential direction, and the first air inlet and the second air inlet are symmetrically arranged with respect to the vertical shaft section of the outer cylinder, and are used for respectively providing the drying air flow from bottom to top towards the falling position of the object to be dried when the inner cylinder rotates forwards or backwards; when the inner cylinder rotates forwards or backwards, the first air inlet/the second air inlet can be opened to provide relative drying air flow.

5. The drying apparatus of claim 4, comprising a first bottom duct and a second bottom duct corresponding to the first air inlet and the second air inlet, the first bottom duct/the second bottom duct being rotatable such that the first air inlet/the second air inlet supplies the air flow at an adjustable angle to the vertical direction.

6. The drying apparatus as claimed in claim 5, wherein the second/first ventilating opening is opened and the ventilating angle is adjusted to provide an air current toward a falling position of the drying object when the inner drum is rotated forwardly/reversely.

7. The drying apparatus of any one of claims 1 to 6, wherein the air inlet comprises one or more air inlets arranged axially along the bottom of the tub.

8. The drying apparatus of any one of claims 1 to 6, further comprising an air outlet duct connected to the tub for discharging hot and humid air dried in the tub out of the tub.

9. The drying apparatus of any one of claims 1 to 6, further comprising a drain pipe connected to the outer tub to drain condensed water generated in the drying tub through the drain pipe.

10. A drying method of a drying device is characterized by comprising the following steps: rotating the inner cylinder to enable the object to be dried in the inner cylinder to rotate along with the inner cylinder and to fall freely when the object to be dried rotates to a high position; the air inlet pipeline supplies drying air, flows out from the air inlet at the lower part of the outer cylinder and provides drying airflow from bottom to top for the objects to be dried in the inner cylinder.

11. The drying method according to claim 10, wherein the air inlets are a first air inlet and a second air inlet which are arranged along the circumferential direction, and the first air inlet and the second air inlet are symmetrically arranged on the vertical axis section of the outer cylinder; when the inner cylinder rotates forwards, the first air inlet is opened to provide a bottom-to-top drying airflow to the falling position of the object to be dried rotating forwards; when the inner cylinder rotates reversely, the second air inlet is opened to provide drying airflow from bottom to top to the falling position of the object to be dried.

12. The drying method of claim 10 or 11, wherein an angle of the inlet is adjustable, and the angle of the inlet is adjusted after the air is introduced to be directed to a falling position of the drying object at the time of forward/reverse rotation.