CN112460961A

CN112460961A - High-efficient kit drying equipment of anti-condensation water type

Info

Publication number: CN112460961A
Application number: CN202011298041.5A
Authority: CN
Inventors: 李银玲; 袁贵雨
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-03-09

Abstract

The invention discloses anti-condensation water type efficient kit drying equipment which comprises a drying box, wherein a drying chamber and a rotating cavity are arranged in the drying box, the rotating cavity is positioned below the drying chamber, heating resistance wires are arranged on the inner walls of two sides of the drying chamber, a placing frame is arranged in the drying chamber, the placing frame consists of a plurality of perforated plates, and a plurality of kits are placed in the placing frame; the power-on mechanism comprises a power generation groove arranged on the inner wall of one side of the drying chamber. When the equipment dries the kit, the heat generated by the heating resistance wire can be rapidly dispersed in the drying chamber, and the humid air formed by water evaporation is treated simultaneously, so that the kit can be rapidly dried.

Description

High-efficient kit drying equipment of anti-condensation water type

Technical Field

The invention relates to the field of kit drying, in particular to anti-condensation water type efficient kit drying equipment.

Background

The kit is a box for containing chemical reagents for detecting chemical components, drug residues, virus types and the like, is generally used in hospitals and pharmaceutical enterprises, is a use tool with important function in medical appliances, and needs to contain various samples, so the cleanness of the kit can directly influence the inspection result, and the cleaning work of the kit is very important;

the kit generally needs to be dried and then can be put into use, but the kit demand of medical institution is great, the time that the kit is naturally air-dried or manually wiped is longer, therefore, drying equipment is usually needed to dry the kit, and when the existing kit drying equipment dries, the drying speed is slow, and the damp air after drying can contact with the top of the drying box, so as to form condensed water, the formed condensed water is easy to adhere to the kit again, thereby causing the drying speed to be slow, therefore, the problem is solved by designing a condensation-proof water-type efficient kit drying equipment.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides the anti-condensation water type efficient kit drying device.

In order to achieve the purpose, the invention adopts the following technical scheme:

an anti-condensation water type efficient kit drying device comprises a drying box, wherein a drying chamber and a rotating cavity are formed in the drying box, the rotating cavity is located below the drying chamber, heating resistance wires are mounted on the inner walls of two sides of the drying chamber, a placing frame is arranged in the drying chamber and consists of a plurality of perforated plates, and a plurality of kits are placed in the placing frame; the device comprises a power-on mechanism, a heat-conducting plate, a thermoelectric generation piece, a micro motor, a first rotating rod, a second rotating rod, a third rotating rod, a fourth rotating rod, a fifth rotating rod, a sixth rotating rod, a fifth rotating rod and a sixth rotating rod, wherein the power-on mechanism comprises a power generation groove formed in the inner wall of one side of a drying chamber, the heat-conducting plate is fixedly connected to the notch of the power generation groove, the thermoelectric generation piece is installed in the power generation groove, one end of the thermoelectric generation piece is fixedly connected with the heat-conducting plate, the other end of the thermoelectric generation piece is fixedly connected with the heat-conducting plate; two turbulence mechanisms, two of which are respectively arranged at the left side and the right side of the placing frame, the turbulence mechanisms comprise crown gears sleeved on first rotating rods, vertical rods are vertically arranged in the drying chamber, the upper ends of the vertical rods are rotatably connected with the inner top of the drying chamber, the lower ends of the vertical rods extend into the rotating cavity, a first gear matched with the crown gears is sleeved on the part of the vertical rods, which is positioned in the rotating cavity, a thread layer is arranged on the part of the vertical rods, which is positioned in the drying chamber, a thread block is connected with the part of the vertical rods, which is positioned in the thread layer, a supporting frame is arranged at the upper end of the thread block, a second rotating rod is arranged on the supporting frame in a penetrating manner and is rotatably connected with the supporting frame, one end, which is positioned at the supporting frame and is close to the placing frame, is fixedly connected with a plurality of fan blades, one end, which, the vertical rod is provided with a limiting plate in a penetrating mode, the limiting plate is fixedly connected with the vertical rod, and the lower end of the limiting plate is fixedly connected with a rotating rack matched with the third gear.

Preferably, be equipped with the chassis in the drying chamber, the lower extreme on chassis is connected through the interior bottom rotation of pivot with the drying chamber, the lower extreme of placing the frame and the upper end fixed connection on chassis, the chassis is the annular, the outer lane fixedly connected with annular rack on chassis, two all overlap the second gear that is equipped with the annular rack of cooperation on the montant.

Preferably, two equal fixedly connected with guide bar of lower extreme of limiting plate, two the guide bar all runs through corresponding screw thread piece, two the guide bar respectively with corresponding screw thread piece sliding connection.

Preferably, a movable cavity is arranged in the drying box, the movable cavity is positioned above the drying chamber, the upper ends of the two vertical rods extend into the movable cavity, cams are sleeved on the parts of the two vertical rods, which are positioned in the movable cavity, two baffles for sliding left and right are symmetrically arranged in the movable cavity, the two baffles are positioned between the two cams, the opposite ends of the two baffles are elastically connected through springs, the opposite ends of the two baffles are matched with the corresponding cams, the movable cavity is communicated with the drying chamber through two air inlet pipes, a plurality of air outlet pipes are arranged on the two baffles, two drying structures are symmetrically arranged in the movable cavity, the two drying structures are respectively positioned on the opposite sides of the two cams, two air cavities are symmetrically arranged in the drying box and are respectively matched with the corresponding heating resistance wires, the space of the movable cavity, which is positioned at the opposite side of the two drying structures, is respectively communicated with the corresponding air cavities through two air pipes, and the opposite sides of the two air cavities are respectively communicated with the drying chamber through a plurality of ventilation openings; and one-way valves are respectively arranged in the two air inlet pipes, the plurality of air outlet pipes and the two air vent pipes.

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

1. during the use, the kit that will dry is placed and is placed in the frame, after the kit has been placed, starts two heating resistor silk, heats the air in the drying chamber for the temperature in the drying chamber risees, and the heat-conducting plate gives the thermoelectric generation piece with the temperature transfer, makes the both ends of thermoelectric generation piece produce the difference in temperature, and then produces the electric energy, makes micro motor rotate, does not need external power supply again, has practiced thrift the consumption of the energy.

2. Rotation of micro motor drives the rotation of first bull stick, the rotation of first bull stick drives the rotation of montant, and then drive the screw block and carry out reciprocating motion from top to bottom, when the screw block shifts up, make a plurality of flabellums on the second bull stick rotate, and when the screw block moves down, then can make a plurality of flabellums antiport, when reciprocating motion from top to bottom of screw block promptly, a plurality of flabellums can carry out corotation for a moment the circulation of reversal, stir the air in the stoving room, make steam can be quick be full of whole drying chamber, the quick drying of the kit of being convenient for.

3. Two montants can drive two second gears and rotate when rotating, and two second gears drive the chassis with the meshing of annular rack and rotate, and then drive and place the frame and rotate for place the heat contact that the kit in the frame can be better and two heating resistor silk produce, because the annular rack is great, so the slew velocity on chassis can be slower, the relative time of extension kit and heating resistor silk has improved the drying efficiency of kit.

4. In the in-process of drying, moisture on the kit can evaporate into vapor and rise, float at the interior top of drying chamber, when two cams rotate, make the spring expand and extrude, when the spring receives the extrusion, extrude two air cavities with the air between two baffles, the air can advance dry structure, dry the air, absorb moisture in the air, then in reentrant drying chamber, when the spring expands, the vapor at top in the drying chamber is absorbed between two baffles, and then reduce the vapor in the drying chamber, rotate the time with vapor next time at two cams and dry, air after will drying flows in the drying chamber again, make the stoving effect of kit better.

5. This in-process in the air entering drying chamber after the drying, the air can pass the heating resistor silk, blows the heating resistor silk for the heat that the heating resistor silk produced can be better at the drying chamber dispersion, is favorable to improving the temperature in the drying chamber fast, makes the stoving effect better.

Drawings

FIG. 1 is a schematic structural diagram of an anti-condensation water-type efficient kit drying device provided by the invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 4 is an enlarged schematic view of a portion B of fig. 3.

In the figure: 1 drying box, 2 drying chambers, 3 heating resistance wires, 4 power generation grooves, 5 heat conducting plates, 6 thermoelectric power generation pieces, 7 radiating fins, 8 rotating cavities, 9 micro motors, 10 first rotating rods, 11 chassis, 12 placing frames, 13 rotating shafts, 14 crown gears, 15 vertical rods, 16 limiting plates, 17 first gears, 18 second gears, 19 annular racks, 20 threaded blocks, 21 supporting frames, 22 second rotating rods, 23 fan blades, 24 third gears, 25 rotating racks, 26 movable cavities, 27 cams, 28 baffles, 29 air outlet pipes, 30 springs, 31 drying structures, 32 air inlet pipes, 33 air vent pipes and 34 air cavities.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1

Referring to fig. 1-2, a condensation water prevention type efficient kit drying device comprises a drying box 1, wherein a drying chamber 2 and a rotating chamber 8 are arranged in the drying box 1, the rotating chamber 8 is positioned below the drying chamber 2, heating resistance wires 3 are arranged on the inner walls of two sides of the drying chamber 2 respectively, the heating resistance wires 3 are in the prior art and generate heat after being electrified, a placing frame 12 is arranged in the drying chamber 2, the placing frame 12 is composed of a plurality of porous plates, the manufacturing material of each porous plate is a heat conducting material, so that the heat can be conveniently and rapidly transmitted to a kit, and a plurality of kits are placed in the placing frame 12;

the power-on mechanism comprises a power generation groove 4 arranged on the inner wall of one side of the drying chamber 2, a heat conduction plate 5 is fixedly connected at the notch of the power generation groove 4, a thermoelectric generation sheet 6 is arranged in the power generation groove 4, the thermoelectric generation sheet 6 is the prior art, when temperature difference occurs at the two ends of the thermoelectric generation sheet 6, current can be generated, one end of the thermoelectric generation sheet 6 is fixedly connected with the heat conduction plate 5, the other end of the thermoelectric generation sheet 6 is fixedly connected with a plurality of radiating fins 7, the two ends of the thermoelectric generation sheet 6 are easier to generate temperature difference by the radiating fins 7, one side of the plurality of radiating fins 7 far away from the thermoelectric generation sheet 6 extends to the outside, a micro motor 9 is arranged at one side of the drying chamber 1, the micro motor 9 is electrically connected with the thermoelectric generation sheet 6 through a wire, a first rotating rod 10 is horizontally arranged in the rotating chamber 8, the two ends of the first rotating rod 10 are respectively rotatably connected, the tail end of an output shaft of the micro motor 9 extends into the rotating cavity 8 and is fixedly connected with one end of the first rotating rod 10, and the rotation of the micro motor 9 can drive the first rotating rod 10 to rotate;

two turbulence mechanisms, the two turbulence mechanisms are respectively arranged at the left side and the right side of the placing frame 12, the turbulence mechanisms comprise crown gears 14 sleeved on the first rotating rods 10, vertical rods 15 are vertically arranged in the drying chamber 2, the upper ends of the vertical rods 15 are rotatably connected with the inner top of the drying chamber 2, the lower ends of the vertical rods 15 extend into the rotating cavity 8, the parts of the vertical rods 15, which are positioned in the rotating cavity 8, are sleeved with first gears 17 matched with the crown gears 14, the first gears 17 are meshed with the crown gears 14, the rotation of the crown gears 14 drives the first gears 17 to rotate, thread layers are arranged on the parts of the vertical rods 15, which are positioned in the drying chamber 2, the threads of the thread layers are similar to the threads of a reciprocating screw rod, the parts of the vertical rods 15, which are positioned in the thread layers, are connected with thread blocks 20, a supporting frame 21 is arranged at the upper ends of the thread blocks 20, a second rotating rod 22 penetrates through, the end, close to the placing frame 12, of the second rotating rod 22, located on the supporting frame 21, is fixedly connected with a plurality of fan blades 23, the fan blades 23 generate wind when rotating and blow heat, one end, located on the supporting frame 21, of the second rotating rod 22, far away from the placing frame 12, is sleeved with a third gear 24, a limiting plate 16 penetrates through the vertical rod 15, the limiting plate 16 is fixedly connected with the vertical rod 15, the lower end of the limiting plate 16 is fixedly connected with a rotating rack 25 matched with the third gear 24, the third gear 24 is meshed with the rotating rack 25 and further drives the second rotating rod 22 to rotate, the lower ends of the two limiting plates 16 are fixedly connected with guide rods, the two guide rods penetrate through corresponding thread blocks 20, the two guide rods are respectively connected with the corresponding thread blocks 20 in a sliding mode, and a guiding effect is achieved on movement of the thread blocks 20;

be equipped with chassis 11 in drying chamber 2, the lower extreme of chassis 11 is connected through the interior bottom rotation of pivot 13 with drying chamber 2, the lower extreme of placing frame 12 and the upper end fixed connection on chassis 11, chassis 11 is the annular, chassis 11's outer lane fixedly connected with annular rack 19, all overlap on two montants 15 and be equipped with the second gear 18 of cooperation annular rack 19, second gear 18 and annular rack 19 intermeshing, when second gear 18 rotates, drive annular rack 19 and rotate.

When the device is used, a kit to be dried is placed in the placing frame 12, and can be placed (4 kits are placed) as shown in fig. 1, and it is worth noting that in order to facilitate placing and taking out of the kit and ensure the temperature in the drying chamber 2, a switchable sealing door (not shown) needs to be installed on the front side of the device, after the kit is placed, two heating resistance wires 3 are started to heat the air in the drying chamber 2, so that the temperature in the drying chamber 2 is raised, the heat conducting plate 5 transfers the temperature to the thermoelectric generation sheet 6, so that the temperature difference is generated at the two ends of the thermoelectric generation sheet 6, and further, electric energy is generated, and the micro motor 9 is rotated;

the rotation of the micro motor 9 drives the rotation of the first rotating rod 10, taking a turbulent flow mechanism as an example, the rotation of the first rotating rod 10 drives the rotation of the vertical rod 15 through the engagement of the crown gear 14 and the first gear 17, because the thread of the thread layer on the vertical rod 15 is similar to the thread of the reciprocating screw rod, the rotation of the vertical rod 15 drives the thread block 20 to reciprocate up and down, when the thread block 20 moves up, the support frame 21 drives the second rotating rod 22 to move up, when the second rotating rod 22 moves up, the third gear 24 thereon is driven to engage with the corresponding rotating rack 25, and further drives the second rotating rod 22 to rotate, the rotation of the second rotating rod 22 drives the plurality of fan blades 23 thereon to rotate, when the thread block 20 moves down, the third gear 24 is made to engage with the corresponding rotating rack 25 in the opposite direction, and further drives the plurality of fan blades 23 to rotate in the opposite direction, that is, when the thread block 20 moves up and down, the fan blades 23 can rotate forwards and reversely for a moment to stir the air in the drying chamber 2, so that the whole drying chamber 2 can be quickly filled with hot air, and the kit can be quickly dried;

in the in-process of heating, the temperature all around of two heating resistor silk 3 can be preferentially higher than other spaces, so the kit is dried more easily when being close to with heating resistor silk 3, and two montants 15 are when rotating, can drive two second gears 18 and rotate, two second gears 18 drive chassis 11 with the meshing of annular rack 19 and rotate, and then drive and place frame 12 and rotate, make the kit of placing in the frame 12 can be better with the heat contact of two heating resistor silk 3 productions, it is worth noting, because annular rack 19 is great, so the slew velocity of chassis 11 can be slower, the time of being close to of extension kit and heating resistor silk 3, the stoving speed of kit has been accelerated.

Example 2

Referring to fig. 3-4, the difference between this embodiment and embodiment 1 is that a movable cavity 26 is disposed in the drying box 1, the movable cavity 26 is located above the drying chamber 2, the upper ends of two vertical rods 15 extend into the movable cavity 26, cams 27 are respectively sleeved on the portions of the two vertical rods 15 located in the movable cavity 26, two baffles 28 for sliding left and right are symmetrically disposed in the movable cavity 26, the two baffles 28 are located between the two cams 27, opposite ends of the two baffles 28 are elastically connected by springs 30, opposite ends of the two baffles 28 are matched with the corresponding cams 27, opposite ends of the two baffles 28 are fixedly connected with bumps, the bumps abut against the cams 27, the movable cavity 26 is communicated with the drying chamber 2 by two air inlet pipes 32, so that the air in the drying chamber 2 is absorbed into the movable cavity 26, a plurality of air outlet pipes 29 are disposed on the two baffles 28, two drying structures 31 are symmetrically disposed in the movable cavity 26, the two drying structures 31 are respectively positioned on opposite sides of the two cams 27, the drying structures 31 can be mechanisms consisting of drying agents and other substances capable of adsorbing moisture in air, two air cavities 34 are symmetrically arranged in the drying box 1, the two air cavities 34 are respectively matched with the corresponding heating resistance wires 3, namely, the two air cavities are arranged on one side of the heating resistance wires 3 away from the drying chamber 2, the space of the movable cavity 26, which is positioned on the opposite side of the two drying structures 31, is respectively communicated with the corresponding air cavities 34 through two air pipes 33, and the opposite sides of the two air cavities 34 are respectively communicated with the drying chamber 2 through a plurality of air vents; check valves are respectively arranged in the two air inlet pipes 32, the plurality of air outlet pipes 29 and the two vent pipes 33, and the check valves are convenient for controlling the unidirectional flow of air.

In the drying process, water on the reagent kit is evaporated into water vapor and rises to float on the inner top of the drying chamber 2, when the two vertical rods 15 rotate, the two cams 27 are driven to rotate, in the initial state, the two cams 27 are placed as shown in fig. 3, the spring 30 is in a loose state, when the two cams 27 rotate, under the action of the spring 30, the two cams 27 always abut against the corresponding baffle 28, so that the two baffles 28 move oppositely and oppositely, when the two baffles 28 move oppositely, air between the two baffles 28 is extruded into the two air cavities 34, in the process, the air enters the drying structure 31 to be dried, the water in the air is absorbed, and the air passes through the air cavities 34 to enter the drying chamber 2 again;

when the two baffles 28 move away from each other, the water vapor at the top in the drying chamber 2 is absorbed between the two baffles 28, so that the water vapor in the drying chamber 2 is reduced, condensed water formed by the water vapor is prevented from being attached to the reagent kit again, and the air with moisture is dried by the drying structure 31 when the two baffles 28 move relatively, and the dried air flows into the drying chamber 2 again, so that the drying effect of the reagent kit is better;

it is worth noting that, this in-process in the air entering drying chamber 2 after the drying, the air can pass heating resistor silk 3, blows heating resistor silk 3 for the heat that heating resistor silk 3 produced can be better at the 2 dispersions of drying chamber, is favorable to improving the temperature in drying chamber 2 fast, makes the stoving effect better.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a high-efficient kit drying equipment of anti-condensation water type which characterized in that includes:

the drying box comprises a drying box (1), wherein a drying chamber (2) and a rotating cavity (8) are formed in the drying box (1), the rotating cavity (8) is located below the drying chamber (2), heating resistance wires (3) are mounted on the inner walls of two sides of the drying chamber (2), a placing frame (12) is arranged in the drying chamber (2), the placing frame (12) is composed of a plurality of perforated plates, and a plurality of reagent boxes are placed in the placing frame (12);

the circular telegram mechanism, circular telegram mechanism is including offering power generation groove (4) on drying chamber (2) one side inner wall, the notch fixedly connected with heat-conducting plate (5) of power generation groove (4), install thermoelectric generation piece (6) in power generation groove (4), the one end and heat-conducting plate (5) fixed connection of thermoelectric generation piece (6), the other end fixedly connected with a plurality of fin (7) of thermoelectric generation piece (6), it is a plurality of one side that thermoelectric generation piece (6) were kept away from in fin (7) all extends to the external world, micro motor (9) are installed to one side of stoving case (1), micro motor (9) pass through wire electric connection with thermoelectric generation piece (6), it is equipped with first bull stick (10) to rotate chamber (8) interior level, the both ends of first bull stick (10) are connected with the both sides inner wall rotation of rotating chamber (8) respectively, the tail end of an output shaft of the micro motor (9) extends into the rotating cavity (8) and is fixedly connected with one end of the first rotating rod (10);

two vortex mechanisms, two the vortex mechanism sets up respectively in the left and right sides of placing frame (12), vortex mechanism is including the cover crown gear (14) of establishing on first bull stick (10), the vertical montant (15) that is equipped with in drying chamber (2), the upper end of montant (15) is connected with the interior top rotation of drying chamber (2), the lower extreme of montant (15) extends to and rotates in chamber (8), the part cover that montant (15) is located and rotates chamber (8) is equipped with first gear (17) of cooperation crown gear (14), the part that montant (15) is located drying chamber (2) is seted up and is equipped with the screw thread layer, the part threaded connection that montant (15) is located the screw thread layer has screw thread piece (20), support frame (21) is installed to the upper end of screw thread piece (20), run through on support frame (21) and be equipped with second bull stick (22), second bull stick (22) rotates with support frame (21) to be connected, second bull stick (22) are located support frame (21) and are close to a plurality of flabellum (23) of one end fixedly connected with of placing frame (12), second bull stick (22) are located support frame (21) and keep away from the pot head of placing frame (12) and are equipped with third gear (24), run through on montant (15) and be equipped with limiting plate (16), limiting plate (16) and montant (15) fixed connection, the rotation rack (25) of the lower extreme fixedly connected with cooperation third gear (24) of limiting plate (16).

2. The drying equipment for the anti-condensation water type high-efficiency kit according to claim 1, wherein a chassis (11) is arranged in the drying chamber (2), the lower end of the chassis (11) is rotatably connected with the inner bottom of the drying chamber (2) through a rotating shaft (13), the lower end of the placing frame (12) is fixedly connected with the upper end of the chassis (11), the chassis (11) is annular, an annular rack (19) is fixedly connected with the outer ring of the chassis (11), and two second gears (18) matched with the annular rack (19) are sleeved on the vertical rods (15).

3. The drying equipment for the anti-condensation water type high-efficiency kit as claimed in claim 1, wherein the lower ends of the two limiting plates (16) are fixedly connected with guide rods, the two guide rods penetrate through the corresponding thread blocks (20), and the two guide rods are respectively connected with the corresponding thread blocks (20) in a sliding manner.

4. The drying equipment for the anti-condensation water type high-efficiency kit as claimed in claim 1, wherein a movable cavity (26) is arranged in the drying box (1), the movable cavity (26) is located above the drying chamber (2), the upper ends of the two vertical rods (15) extend into the movable cavity (26), the parts of the two vertical rods (15) located in the movable cavity (26) are sleeved with cams (27), two baffles (28) for sliding left and right are symmetrically arranged in the movable cavity (26), the two baffles (28) are located between the two cams (27), the opposite ends of the two baffles (28) are elastically connected through springs (30), the opposite ends of the two baffles (28) are matched with the corresponding cams (27), and the movable cavity (26) is communicated with the drying chamber (2) through two air inlet pipes (32), the two baffles (28) are respectively provided with a plurality of air outlet pipes (29), the movable cavity (26) is internally and symmetrically provided with two drying structures (31), the two drying structures (31) are respectively positioned at the opposite sides of the two cams (27), the drying box (1) is internally and symmetrically provided with two air cavities (34), the two air cavities (34) are respectively matched with the corresponding heating resistance wires (3), the space of the movable cavity (26) positioned at the opposite side of the two drying structures (31) is respectively communicated with the corresponding air cavities (34) through two air pipes (33), and the opposite sides of the two air cavities (34) are respectively communicated with the drying chamber (2) through a plurality of air vents;

check valves are arranged in the two air inlet pipes (32), the plurality of air outlet pipes (29) and the two vent pipes (33).