Drying apparatus

Abstract

The application discloses a drying equipment, which comprises a drying box, a heating module and an exhaust device. The exhaust device is arranged on the back of the heating module and comprises an exhaust channel and an air suction fan. The exhaust channel is provided with an inlet and an outlet. The inlet is arranged opposite to the back of the heating module. The air suction fan is arranged at the outlet. The exhaust device is arranged on the back of the heating module. The air on the front of the heating module is drawn into the exhaust channel and then discharged from the outlet of the exhaust channel. In this way, the exhaust gas is prevented from adhering to the surface of the heating element, the problem that the exhaust gas is adhered to the heating element and affects the heat output and corrodes the equipment is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textiles, in particular to a drying device. BACKGROUND

[0002] In the process of direct printing by digital machine, in order to improve the printing effect and quality, a pre-treatment liquid needs to be sprayed on the fabric before printing by the digital machine, which can effectively reduce the penetration and diffusion of ink on the fabric during digital printing, and can significantly improve the brightness and fastness of the color. The drying degree of the fabric after spraying the pre-treatment liquid online will seriously affect the quality of printing, and waste gas will be generated during the drying process. The waste gas will adhere to the heating element for a long time, affecting the output of heat and corroding the equipment. SUMMARY

[0003] The embodiment of the present application aims to provide a drying device which can solve the technical problem that the waste gas generated by the drying box in the prior art affects the heat output and corrodes the equipment.

[0004] The embodiment of the present application solves the technical problem by adopting the following technical scheme:

[0005] The present application discloses a drying device, which comprises a drying box, wherein the drying box comprises:

[0006] A heating module is provided with a heating element, and the heating module comprises a working surface and a back surface opposite to the working surface.

[0007] An exhaust device is arranged on the back surface of the heating module, and the exhaust device comprises an exhaust passage and an exhaust fan.

[0008] Optionally, the cross section of the inlet is larger than that of the outlet.

[0009] Optionally, the exhaust passage comprises an exhaust hood and an exhaust pipeline which are in communication with each other, the exhaust hood is arranged on the back surface of the heating module, the exhaust pipeline is in communication with one side of the exhaust hood which is away from the heating module, the inlet is located on one side of the exhaust hood which is opposite to the heating module, and the outlet is located at one end of the exhaust pipeline which is away from the exhaust hood.

[0010] Optionally, the heating module further comprises a reflecting plate for reflecting heat radiation, the reflecting plate is arranged on one side of the heating element which is away from the working surface, the surface of the reflecting plate is arc-shaped, and the edge of the inlet is provided with a tooth-shaped structure which is matched with the shape of the reflecting plate.

[0011] Optionally, a protective shell is arranged on the back of the heat generating module, the heat generating module is fixedly connected with the protective shell, and the protective shell is provided with a window for exposing the exhaust duct.

[0012] Optionally, the heat generating module further comprises an electric control box arranged on the protective shell, the drying box further comprises an electric control box clamped on the protective shell, the exhaust passage is arranged in the electric control box, and the surface of the electric control box is provided with an opening for exposing the outlet.

[0013] Optionally, the heat generating module further comprises a reflecting plate for reflecting heat radiation, the reflecting plate is arranged on the side of the heat generating pipe away from the front face, and the air permeable passage comprises an air permeable hole arranged on the surface of the reflecting plate.

[0014] Optionally, the support is rotationally connected with the drying box, and the drying box has a first position relative to the rotation track of the support, so that the working surface of the heat generating module faces the horizontal direction.

[0015] Optionally, a locking device is further arranged between the support and the drying box, and the locking device is used for locking the drying box at the first position.

[0016] Optionally, the locking device comprises a positioning pin fixedly connected with the heat generating module, and a positioning hole arranged on the support, and the positioning pin is matched with the positioning hole.

[0017] At least one technical advantage of the drying box disclosed in the present application is that: by arranging the exhaust device on the back of the heat generating module, the air on the front face of the heat generating module is sucked into the exhaust passage by the air suction fan, and then is discharged from the outlet of the exhaust passage, so that the exhaust gas is prevented from adhering to the surface of the heat generating element, effectively solving the problem that the exhaust gas is adhered to the heat generating element, affecting the output of heat and corroding the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are exemplarily illustrated by pictures in the drawings corresponding thereto, and the exemplarily illustrations do not constitute a limitation on the embodiments, and elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, and the drawings do not constitute a proportional limitation.

[0019] Figure 1 FIG. 1 is a structural schematic diagram of a drying box in an embodiment of the present application;

[0020] Figure 2 FIG. 2 is a structural schematic diagram of the drying box in another view in an embodiment of the present application;

[0021] Figure 3 FIG. 3 is an assembly view of the drying box in an embodiment of the present application;

[0022] Figure 4 A partial sectional view of the drying box in an embodiment of the present application;

[0023] Figure 5 For Figure 4 An enlarged view of A in the middle;

[0024] Figure 6 A structural schematic diagram of the exhaust device in an embodiment of the present application;

[0025] Figure 7 A structural schematic diagram of the exhaust device in another perspective in an embodiment of the present application;

[0026] Figure 8 A structural schematic diagram of the drying box in a first station in an embodiment of the present application;

[0027] Figure 9 A structural schematic diagram of the drying box in a second station in an embodiment of the present application;

[0028] Figure 10 A structural schematic diagram of the support in an embodiment of the present application;

[0029] Figure 11 A structural schematic diagram of the support in another state in an embodiment of the present application;

[0030] Figure 12 A structural schematic diagram of the positioning pin in an embodiment of the present application.

[0031] Corresponding meanings of the reference numerals:

[0032] Drying box 1, heating module 10, heating pipe 101, reflecting plate 102, working surface 11 of air hole 103, back surface 12, protective shell 13, window 130, back plate 131, handle 132, frame 14, electric control box 15, opening 150, buckle 16, clamping groove 17, clamping hole 170, fixing seat 18, through hole 180, screw hole 191, screw 192;

[0033] Exhaust device 2, exhaust channel 20, inlet 201, outlet 202, air suction fan 21, exhaust cover 22, tooth-shaped structure 220, exhaust pipe 23;

[0034] Air blowing fan 3;

[0035] Support 4, base 40, support arm 41, buffer pad 410, connecting arm 42;

[0036] Hinge 5, pin shaft 50, first rotating body 51, second rotating body 52, movable seat 53, first mounting surface 531, second mounting surface 532;

[0037] Positioning pin 6, positioning hole 60, pin seat 61, pin sleeve 62, pin head 63, pin tail 64. DETAILED DESCRIPTION

[0038] For the purpose of promoting the understanding and facilitating appreciation of the invention, the disclosure hereinafter will describe in conjunction with the accompanying drawings and specific embodiments. It is to be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "on", "under", "top", "bottom", "side", "vertical", "horizontal", and the like as used herein are used for ease of description of the embodiments and are not intended to constrict or imply specific orientations of the apparatus or elements thereof, or the manner in which the apparatus or elements thereof are operated or constructed, such that unless otherwise noted, these terms are used interchangeably and are not intended to constrict or imply relative importance of particular embodiments. The terms "first", "second", and the like, do not denote any absolute sequence or time but, are used for description only. The terms "comprises", "comprising", "includes", "including" and the like are synonymous with the term "containing" and are used in the sense of "including, but not limited to". The term "connected" and "coupled" are not restricted to direct connection, but can include connection through media that does not affect the intended function of the connection. Unless otherwise defined, all terms used in the disclosure, such as "parallel", "perpendicular", "identical", and the like, include the strict meanings of the terms as well as the meanings that include certain errors. For example, the term "approximately" can mean that the difference between the compared objects is within 10% or 5% of the average value of the compared objects. In the following description of the embodiments of the present invention, the number of components or elements is not specifically indicated, which means that the components or elements can be one or more, or can be understood as at least one. "At least one" means one or more, and "a plurality of" means at least two.

[0039] Unless otherwise defined, all technical and scientific terms used in the present disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the present invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present invention. The use herein of terms such as "and / or" and "at least one of" includes any and all combinations of one or more of the associated listed items.

[0040] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as they do not conflict with each other. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the described embodiments of the application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0041] The application discloses a drying equipment, which comprises a drying box 1, as shown in the drawings, Figures 1-3 The drying box 1 comprises a heating module 10 and an exhaust device 2, wherein the heating module 10 is provided with a heating element for generating heat radiation. The heating module 10 has a working surface 11 and a back surface 12 opposite to the working surface 11, wherein the working surface 11 is used for directly drying cloth, and the exhaust device is arranged on the back surface of the heating module 10. As shown in the drawings, Figures 4-7 The exhaust device comprises an exhaust channel 20 and an air suction fan 21, the exhaust channel 20 comprises an inlet 201 and an outlet 202, the inlet 201 is arranged opposite to the back surface of the heating module 10, and the air suction fan 21 is arranged at the outlet 202.

[0042] In this way, when the drying box 1 is working, the air near the working surface 11 of the heating module 10 is sucked into the exhaust channel 20 by the air suction fan 21 and then discharged through the outlet 202, so that the waste gas generated during the drying of the cloth is discharged in time, and the waste gas is prevented from adhering to the surface of the heating element to affect the output of heat and corrode the equipment.

[0043] As shown in the drawings, Figure 4 The heating element comprises a plurality of heating pipes 101, and the heating module 10 further comprises a reflecting plate 102 for reflecting heat radiation, the reflecting plate 102 is arranged on the side of the heating pipes 101 away from the working surface 11, the surface of the reflecting plate 102 is provided with air permeable holes 103, the air permeable holes 103 enhance the cross section of the communication between the working surface 11 and the back surface 12 of the heating module 10, and improve the exhaust efficiency.

[0044] The front surface of the heating module 10 is communicated with the exhaust channel 20 through the air permeable holes 103, so as to form an air path through the reflecting plate 102. In this way, the waste gas generated at the front surface of the heating module 10 enters the exhaust channel 20 through the air permeable holes 103 on the surface of the reflecting plate 102, and then is sucked away from the heating module 10 by the air suction fan 21, so that the waste gas is prevented from adhering to the surfaces of the heating pipes 101 and the reflecting plate 102 to affect the output of heat and corrode the heating pipes 101 and the reflecting plate 102.

[0045] As shown in the drawings, Figure 4 and Figure 6As shown, the cross-sectional area of the inlet 201 of the exhaust passage 20 is larger than that of the outlet 202. With such a structure, the space occupied by the exhaust passage 20 is reduced, and the outlet 202 is matched in size with the air suction fan 21, thereby improving the space utilization.

[0046] As shown in Figure 4 and Figure 6 , the exhaust device 2 further comprises an exhaust hood 22 and an exhaust duct 23 which are in communication with each other. The exhaust hood 22 is arranged on the back of the heat generating module 10, and the exhaust duct 23 is in communication with the side of the exhaust hood 22 which is away from the heat generating module 10. Thus, the exhaust hood 22 and the exhaust duct 23 are in communication with each other to form the exhaust passage 20. The inlet 201 of the exhaust passage 20 is formed on the side of the exhaust hood 22 which is opposite to the heat generating module 10, and the outlet 202 is located at the end of the exhaust duct 23 which is away from the exhaust hood 22.

[0047] By arranging the exhaust hood 22, the coverage area of the inlet 201 of the exhaust passage 20 is expanded, thereby expanding the air suction range of the air suction fan 21 and making the exhaust of waste gas more complete.

[0048] As shown in Figure 4 and Figure 6 , the reflecting plate 102 is arranged on the side of the heat generating tube 101 which is away from the working surface 11 to reflect the heat radiation emitted by the heat generating tube 101 to the back surface 12 towards the working surface 11. Thus, the inner surface of the reflecting plate 102 is curved, and the radial cross section of the reflecting plate 102 is in the shape of a circular arc. The edge of the exhaust hood 22 at the inlet 201 of the exhaust passage 20 is provided with a tooth-shaped structure 220. The adjacent two teeth of the tooth-shaped structure 220 are in the shape of an arc which is matched with the shape of the reflecting plate 102.

[0049] The tooth-shaped structure 220 makes the exhaust hood 22 closely fit the reflecting plate 102, thereby improving the air tightness of the exhaust passage 20 and the use efficiency of the air suction fan 21, and thus increasing the mechanical efficiency of the exhaust device 2.

[0050] As shown in Figures 1-3 , the heat generating module 10 further comprises a protective shell 13 which is arranged on the back of the heat generating module 10. The protective shell 13 is provided with a window 130 which is used for exposing the exhaust passage 20, and the exhaust device 2 is fixedly arranged on the protective shell 13. Specifically, the drying box 1 further comprises a frame 14. The heat generating tube 101 and the reflecting plate 102 are fixed on the frame 14, and the protective shell 13 is fixedly connected with the frame 14 to form the shell of the drying box 1. The protective shell 13 comprises a back plate 131. The window 130 is arranged on the surface of the back plate 131. The exhaust hood 22 is arranged in the cavity enclosed by the protective shell 13 and the reflecting plate 102. The exhaust duct 23 is in communication with the exhaust hood 22 through the window 130. The exhaust hood 22 is fixedly connected with the protective shell 13, and the exhaust duct 23 is fixedly connected with the exhaust hood 22.

[0051] As shown in Figure 3and Figure 4 As shown, the drying oven 1 also includes an electrical control box 15 disposed on the protective shell 13. The electrical control box 15 contains a circuit board electrically connected to the heating element 101 and the suction fan 21. The exhaust duct 23 passes through the electrical control box 15, and the surface of the electrical control box 15 has an opening 150 for the exhaust channel 20 outlet 202 to be exposed. In this way, the exhaust gas is discharged from the drying oven 1 through the opening 150 under the action of the suction fan 21.

[0052] To facilitate quick disassembly and assembly during maintenance, such as Figures 4-5 As shown, in this embodiment, the electrical control box 15 and the back panel 131 are connected by a snap fastener. Specifically, the back panel 131 is fixed with two rows of snap fasteners 16, and the side of the electrical control box 15 facing the back panel 131 is fixed with a slot 17. The slot 17 has a locking hole 170 that matches the snap fastener 16. The snap fastener 16 can enter the slot 17 through the locking hole 170 and slide within the slot 17. The width of the slot 17 is smaller than the diameter of the locking hole 170. Therefore, when the snap fastener 16 slides within the slot 17, as long as the snap fastener 16 and the locking hole 170 are misaligned, the slot 17 can restrict the snap fastener 16 from coming out in a direction perpendicular to the slot 17. During installation, first, the snap fastener 16 is pressed into the locking hole 170, and then the handle 132 fixed to the protective shell 13 is pulled to make the snap fastener 16 slide within the slot 17 and thus misalign with the locking hole 170, thereby achieving the snap fastening between the electrical control box 15 and the protective shell 14.

[0053] To prevent relative movement between the electrical control box 15 and the back panel 131 along the slot 17, and to ensure that the buckle 16 and the slot 170 remain misaligned, a locking structure is also provided between the electrical control box 15 and the protective shell 13. Specifically, such as Figure 3 As shown, the locking structure includes a mounting base 18 disposed on the side of the electrical control box 15, a screw hole 192 disposed on the surface of the back plate 131, and a bolt 191 for fixing the mounting base 18 to the back plate 131. The mounting base 18 has a through hole 180 through which the bolt 191 passes. After the bolt 191 passes through the through hole 180, it is screwed into the screw hole 192, thus completing the installation of the electrical control box 15.

[0054] In this way, the electrical control box 15 is snapped into the protective shell 13 through the buckle 16 and the slot 17. When it is necessary to replace the heating tube 101 or repair the circuit, the electrical control box 15 can be quickly disassembled and assembled, which facilitates product maintenance.

[0055] like Figure 3As shown, the protective shell 13 is also provided with a blowing fan 3, which is arranged towards the heat pipe 101. The blowing fan 3 blows air to the working surface 11 of the heat module 10, so as to accelerate the evaporation of the moisture on the surface of the cloth and shorten the drying time. The blowing air duct of the blowing fan 3 is formed between the exhaust cover 22 and the protective shell 13. The blowing air duct is separated from the exhaust channel 20 by the exhaust cover 22, so as to avoid the interference between the blowing fan 3 and the suction fan 21.

[0056] As shown, Figure 8 The drying device also includes a support 4, which is rotationally connected to the drying box 1 by a connecting piece. The drying box 1 is fixedly arranged on the work station by the support 4. The drying box 1 has a first position and a second position on the rotation track relative to the support 4. As shown, Figure 8 The first position is a cleaning position. When the drying box 1 is at the first position, the working surface 11 of the heat module 10 faces the horizontal direction. Therefore, when the drying box 1 is at the first position, the cleaner faces the working surface 11 of the heat module 10, so that the cleaning action can be completed without bending over or crouching, which greatly facilitates the cleaning and maintenance of the heat module 10. As shown, Figure 9 When the drying box 1 is rotated to the second position, the working surface 11 of the heat module 10 faces the vertical direction. The second position is a working position of the drying box 1 during baking. When the drying box 1 dries the cloth, the cloth is located directly below the heat module 10, so that the working surface 11 of the heat module 10 faces vertically downward.

[0057] In this embodiment, as shown, Figure 10 and Figure 11 The drying box 1 is rotationally connected to the support 4 by a connecting piece. The connecting piece includes a hinge 5, which includes a first rotating body 51 and a second rotating body 52 rotationally connected by a pin shaft 50. The first rotating body 51 is fixedly connected to the side surface of the electric control box 15 of the drying box 1, and the second rotating body 52 is fixedly connected to the support 4.

[0058] Specifically, as shown, Figure 10 and Figure 11 The support 4 includes a base 40, a support arm 41, and a connecting arm 42. The support arm 41 is arranged in the horizontal direction relative to the base 40, and the connecting arm 42 is arranged between the support arm 41 and the base, so that the overall shape of the support 40 is "Z". The hinge 5 is arranged at the end of the support arm 41. The first rotating body 51 is fixedly connected to a movable seat 53, which includes a first mounting surface 531 for fixedly connecting to the side surface of the electric control box 15, and a second mounting surface 532 fixedly connected to the first rotating body 51. The first mounting surface 531 and the second mounting surface 532 are perpendicular to each other and parallel to the pin shaft 50. The surface of the protective shell 13 is provided with a handle 132. The drying box 1 can be rotated by pulling the handle 132, so as to switch the drying box 1 between the first position and the second position.Figure 9 and Figure 11 As shown, when the movable seat 53 rotates to the point where the first mounting surface 531 is parallel to the horizontal plane, the drying chamber 1 is in the first position, at which time the working surface 11 of the heating module 10 faces the horizontal direction. A buffer pad 410 is also provided at the end of the support arm 41. When the heating module 10 rotates to the first position, the buffer pad 410 can prevent the electrical control box 15 from colliding with the support arm 41. Figure 8 and Figure 10 As shown, when the movable seat 53 moves to a position where the first mounting surface 531 is parallel to the vertical plane, the heating module 10 is in the second position, at which time the working surface 11 of the heating module 10 faces vertically downwards. Figure 10 and Figure 11 As shown, a locking device is also provided between the bracket 4 and the drying chamber 1. The locking device is used to lock the drying chamber 1 in the first position during cleaning. The locking device includes a positioning pin 6 fixedly connected to the first rotating body 51, and a positioning hole 60 provided in the bracket 4, with the positioning pin 6 and the positioning hole 60 being adapted to each other. Specifically, the locking device also includes pin seats 61 fixed to both sides of the movable seat 53, with the positioning pin 6 disposed on the pin seats 61. One end of the pin seat 61 is fixedly connected to the movable seat 53, and the other end protrudes from the second mounting surface 532. The positioning pin 6 is fixed to the end of the pin seat 61 that protrudes from the second mounting surface 532. In this way, when the movable seat 53 rotates, the pin seat 61 rotates with it. When the movable seat 53 rotates to the first position, the positioning pin 6 coincides with the positioning hole 60. At this time, the positioning pin 6 enters the positioning hole 60, thereby locking the heating module 10 in the first position.

[0059] For ease of operation, such as Figure 12 As shown, the positioning pin 6 in this embodiment is an indexing pin. Specifically, the positioning pin 6 includes a pin sleeve 62, a pin head 63, and a pin tail 64. The pin sleeve 62 is fitted onto the pin head 63, and a spring (not shown in the figure) is also provided between the pin sleeve 62 and the pin head 63. This spring provides the elastic force for the pin head 63 to move towards the positioning hole 60. Thus, when the drying chamber 1 rotates to the first position, the pin head 63 automatically enters the positioning hole 60 under the action of the spring, thereby locking the drying chamber 1 in the first position. When it is necessary to rotate the drying chamber 1 from the first position to the second position, simply pull the pin tail 64 out of the positioning hole 60 to rotate the drying chamber 1 from the first position to the second position.

[0060] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not limited to them; under the idea of the present application, the technical features of the above examples or different examples can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for simplicity; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drying apparatus comprising a drying chamber, characterized by, The drying box comprises: A heating module provided with a heating element, the heating module comprising a working surface and a back surface opposite to the working surface; An exhaust device provided on the back surface of the heating module, the exhaust device comprising an exhaust passage and an exhaust fan, the exhaust passage being provided with an inlet and an outlet, the inlet being arranged opposite to the heating module, and the exhaust fan being arranged at the outlet; The exhaust passage comprises an exhaust hood and an exhaust duct in communication with each other, the exhaust hood being arranged on the back surface of the heating module, the exhaust duct being in communication with one side of the exhaust hood away from the heating module, the inlet being located on one side of the exhaust hood opposite to the heating module, and the outlet being located at one end of the exhaust duct away from the exhaust hood; The heating module further comprises a reflecting plate for reflecting heat radiation, the reflecting plate being arranged on one side of the heating element away from the working surface, the surface of the reflecting plate being provided with air holes in communication with the exhaust passage, the edge of the exhaust hood at the inlet being provided with a tooth-shaped structure, and the tooth-shaped structure being in an arc shape between two adjacent teeth matching the shape of the reflecting plate; The drying box further comprises a protective shell arranged on the back surface of the heating module, the heating module being fixedly connected with the protective shell, and the protective shell being provided with an opening window for the exhaust duct to protrude; The drying box further comprises an electric control box clamped on the protective shell, the exhaust passage being arranged through the electric control box, the surface of the electric control box being provided with an opening for the outlet to protrude, the protective shell comprising a back plate, the opening window being arranged on the surface of the back plate, two rows of buckles being fixed on the back plate, one side of the electric control box opposite to the back plate being fixedly provided with a clamping groove, the clamping groove being provided with clamping holes matched with the buckles, the buckles being capable of entering the clamping groove through the clamping holes and being capable of sliding in the clamping groove, and a locking structure being further arranged between the electric control box and the protective shell; The drying device further comprises a support, the support being rotatably connected with the drying box through a connecting piece, the drying box having a first position and a second position on a rotation track relative to the support, the first position being a cleaning position, the working surface of the heating module facing a horizontal direction when the drying box is at the first position, the working surface of the heating module facing a vertical direction when the drying box is rotated to the second position, and the second position being a working position of the drying box during baking; A locking device is further arranged between the support and the drying box, the locking device being used for locking the drying box at the first position. The connecting piece comprises a hinge, the hinge comprises a first rotating body and a second rotating body connected by a pin shaft, the second rotating body is fixedly connected with the support; the first rotating body is fixedly connected with a movable seat, the movable seat comprises a first mounting surface for fixedly connecting with the side surface of the electric control box and a second mounting surface fixedly connected with the first rotating body; the locking device comprises a positioning pin and a positioning hole arranged on the support, the positioning pin is matched with the positioning hole; the locking device further comprises pin seats fixedly arranged on both sides of the movable seat, the positioning pin is arranged on the pin seat; one end of the pin seat is fixedly connected with the movable seat, the other end protrudes from the second mounting surface, the positioning pin is fixedly arranged on the end of the pin seat protruding from the second mounting surface; the pin seat rotates with the movable seat when the movable seat rotates, when the movable seat rotates to the first position, the positioning pin coincides with the positioning hole; the positioning pin comprises a pin sleeve, a pin head and a pin tail, the pin sleeve is sleeved on the pin head, a spring is further arranged between the pin sleeve and the pin head, the spring is used for providing the elastic force of the pin head moving to the positioning hole.

2. The drying apparatus according to claim 1, characterized by The cross-sectional area of the inlet is greater than that of the outlet.

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