Energy-saving drying box with anti-heat dissipation function

Abstract

The present invention discloses an energy-saving drying box with an anti-heat dissipation function, relating to the technical field of drying boxes, comprising a drying box body, a box door and a placement plate, wherein the placement plate is welded to the interior of the drying box body, and the box door is rotatably connected to the drying box body by hinges; the present invention prevents the airflow that has not fully contacted with the material from being directly discharged, and prevents the heat in the square frame from being quickly dissipated. The fully utilized hot airflow makes the energy utilization efficiency of the drying box body relatively high, and utilizes the hot airflow to replace the cold airflow in the square frame, thereby ensuring that the hot airflow temperature in the square frame can dry the material, and the hot airflow can dry the bottom of the material, and the obliquely arranged ventilation branch pipes can dry different parts of the bottom of the material, so that the material is dried more comprehensively and fully, and the situation that the bottom of the material dries relatively slowly is avoided, and the material will not be adhered to or stuck to the surface of the placement plate when it is taken out.

Description

Technical Field

[0001] The present invention relates to the technical field of drying boxes, in particular to an energy-saving drying box with an anti-heat dissipation function. Background Art

[0002] Depending on the application, the drying box can be used for the painting and curing of workpieces in factories, or for drying fruits and vegetables. Therefore, the drying box is widely used in different fields. The dryer dries the material by introducing hot air into the drying box.

[0003] Existing drying boxes have certain disadvantages. The hot air flow into the drying box body causes the hot air flow to be discharged or dissipated before it completely contacts the material, or the air flow temperature is still relatively high after the high-temperature hot air flow contacts the material. Directly discharging or dissipating the hot air flow can easily cause waste of air flow, so that the heat cannot be fully utilized, and the drying efficiency of the material is relatively low. In addition, the bottom of the material has less contact with the air flow, so the bottom of the material dries slowly, or even cannot be fully dried, affecting the drying efficiency of the material. Summary of the Invention

[0004] The object of the present invention is to provide an energy-saving drying box with an anti-heat dissipation function to solve the problems raised in the above background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An energy-saving drying box with an anti-heat dissipation function comprises a drying box body, a box door and a placement plate, the placement plate being welded to the interior of the drying box body, and the box door and the drying box body being rotatably connected by hinges; four lifting columns are provided inside the drying box body and at the corners of the placement plate, the bottom ends of the lifting columns are slidably connected to the bottom end of the drying box body, an anti-heat dissipation structure is provided inside the drying box body and above each placement plate, the anti-heat dissipation structure comprises an intermediate plate, the intermediate plate is located above the placement plate, and the lifting columns are welded to the four corners of the intermediate plate, a square frame is placed above the placement plate and between the intermediate plate and the placement plate, a folding plate assembly is provided at the edge of the lower surface of the intermediate plate, the folding plate assembly is attached to the inner wall of the square frame, a plurality of first air holes are provided on the side walls of the square frame, a plurality of second air holes are provided on the side walls of the folding plate assembly, and the shape of the first air holes is adapted to the shape of the second air holes.

[0007] As a preferred technical solution of the present invention, a rotating motor is connected to the edge of the box door and located corresponding to the two lifting columns, a cam is provided at the end of the rotating motor and located on the inner wall of the box door, and a fixing plate is welded in the middle of the two lifting columns and located at the cam, and the fixing plate is in contact with the edge of the cam.

[0008] As a preferred technical solution of the present invention, the frame area enclosed by the square frame is smaller than the frame area enclosed by the four lifting columns, and the area of ​​the square frame is adapted to the area of ​​the folding plate assembly, the height of the square frame is adapted to the height of the folding plate assembly, and the position of the first air vent is aligned with the position of the second air vent.

[0009] As a preferred technical solution of the present invention, the cam lift distance is equal to the lifting height of the middle plate, the lifting height of the folding plate assembly is less than the spacing between the upper and lower holes of the first air hole, and the inner wall of the square frame is slidingly connected to the outer wall of the folding plate assembly, and the first air hole and the second air hole are staggered.

[0010] As a preferred technical solution of the present invention, the folding plate assembly includes two groups of connecting strips, two groups of first folding plates and two groups of second folding plates, the two connecting strips are welded to the longitudinal edges of the middle plate, the two groups of connecting strips are rotatably connected to the two groups of first folding plates respectively, the second folding plate is arranged on the width edge of the middle plate, the second folding plate is rotatably connected to the edge of the middle plate, and the four edges of the folding plate assembly are provided with a retractable structure, the retractable structure includes two first steel wire ropes and two second steel wire ropes, the first steel wire rope is connected to the bottom edge of the first folding plate, the second steel wire rope is connected to the bottom edge of the second folding plate, a wire transmission hole is opened inside the middle plate, and the two first steel wire ropes are tied together at one place, and the two second steel wire ropes are tied together at one place.

[0011] As a preferred technical solution of the present invention, the total thickness of the first and second folding plates after folding is less than the height of the middle plate when it is lifted and lowered. The folded second folding plate is located above the folded first folding plate, and the lifting column is slidably connected to the corner of the placement plate.

[0012] As a preferred technical solution of the present invention, a supporting structure is provided between the intermediate plate and the placement plate, and the supporting structure includes an air vent groove, which is opened inside the intermediate plate, and the surfaces of the placement plate and the intermediate plate are both provided with corresponding connecting holes, and an air main pipe is screwed onto the connecting hole of the intermediate plate, and the air main pipe is slidably connected to the connecting hole of the placement plate.

[0013] As a preferred technical solution of the present invention, a ventilation branch pipe is provided at the top of the side wall of the ventilation main pipe. The ventilation branch pipe is arranged obliquely on the side wall of the ventilation main pipe, and the ventilation branch pipe, the ventilation main pipe and the ventilation groove are interconnected.

[0014] As a preferred technical solution of the present invention, limit rings are welded on the cylindrical surfaces of the four lifting columns and above the corners of each placement plate, and the distance between the limit rings and the middle plate is adapted to the lifting height of the middle plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. It is equipped with an anti-heat dissipation structure. By closing the square frame and the folding plate assembly, the heated hot air flow can be covered on the placement plate, so that the material can be dried inside the square frame, avoiding the air flow that has not fully contacted with the material to be directly discharged, preventing the heat in the square frame from dissipating quickly. The fully utilized hot air flow makes the energy utilization efficiency of the drying box relatively high;

[0017] 2. By aligning the first and second air holes of the anti-heat dissipation structure, the inner wall of the square frame and the external air can be connected to each other, so that hot air flows into the interior of the square frame, and the hot air flow replaces the cold air flow in the square frame, thereby ensuring that the hot air flow temperature in the square frame can dry the material;

[0018] 3. A supporting structure is provided. The middle plate can be raised and lowered to make the ventilation main pipe rise and fall at the same time, so that the hot air flow can enter the placement plate from the ventilation slot. The hot air flow can dry the bottom of the material, and the inclined ventilation branch pipes can dry different parts of the bottom of the material, so that the material is dried more comprehensively and fully, avoiding the situation where the bottom of the material is dried slowly;

[0019] 4. The middle plate rises, driving the folding plate assembly and the ventilation main pipe to rise synchronously. When taking out the material and the square frame, not only can the square frame and the folding plate assembly not interfere with each other, but the dried material can also be lifted up to avoid the bottom of the dried material from sticking or fitting to the placement plate, so that the material will not stick or fit to the surface of the placement plate when it is taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 It is the main structure diagram of the present invention;

[0022] Figure 2 A schematic diagram of a placement plate and a lifting column of the present invention;

[0023] Figure 3 This is a schematic diagram of the heat dissipation prevention structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the disassembly of the heat dissipation prevention structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the cam and the rotary motor of the present invention;

[0026] Figure 6 This is a schematic diagram of a state in which the first vent hole and the second vent hole of the present invention are staggered;

[0027] Figure 7 It is a schematic diagram of the retractable structure of the present invention;

[0028] Figure 8 Schematic diagram of the support structure of the present invention;

[0029] Figure 9 Schematic diagram of the limiting ring of the present invention.

[0030] In the figure: 1. Drying box body; 2. Box door; 3. Placement plate; 4. Lifting column; 5. Anti-heat dissipation structure; 6. Retractable structure; 7. Support structure; 8. Fixed plate; 9. Cam; 10. Rotating motor; 51. Middle plate; 52. Square frame; 53. Folding plate assembly; 531. Connecting strip; 532. First folding plate; 533. Second folding plate; 54. First air vent; 55. Second air vent; 61. First steel wire rope; 62. Second steel wire rope; 63. Wire transmission hole; 71. Air vent groove; 72. Connecting hole; 73. Air main pipe; 74. Air branch pipe; 75. Limiting ring. DETAILED DESCRIPTION

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention. Example 1:

[0032] See also Figure 1-Figure 4As shown, the energy-saving drying box with anti-heat dissipation function includes a drying box body 1, a box door 2 and a placement plate 3. The placement plate 3 is welded to the inside of the drying box body 1, and the box door 2 is rotatably connected to the drying box body 1 by a hinge. The material is placed in the middle position of the upper surface of each placement plate 3, and then the box door 2 and the drying box body 1 are closed, so that the hot air flow generated by the drying box is used to dry the material on the placement plate 3; four lifting columns 4 are provided inside the drying box body 1 and at the corners of the placement plates 3, and the bottom ends of the lifting columns 4 are slidably connected to the bottom end of the drying box body 1, and the lifting columns 4 are slidably connected relative to the corners of the placement plates 3, and an anti-heat dissipation structure 5 is provided inside the drying box body 1 and above each placement plate 3. The anti-heat dissipation structure 5 includes an intermediate plate 51, the intermediate plate 51 is located above the placement plate 3, and an intermediate plate 51 is provided below the lowest placement plate 3, and the lifting columns 4 are welded to the intermediate plate The four corners of 51 are welded to the middle plate 51 through the lifting columns 4 so that the middle plate 51 can be raised or lowered synchronously. A square frame 52 is placed above the placement plate 3 and between the middle plate 51 and the placement plate 3. The surface of the placement plate 3 is provided with a reserved groove for placing the square frame 52, and the square frame 52 is consistent with the reserved groove. The square frame 52 can be taken out of the middle plate 51 or the square frame 52 is placed in the middle plate 51. A folding plate assembly 53 is provided at the edge of the lower surface of the middle plate 51. The folding plate assembly 53 is attached to the inner wall of the square frame 52. The square frame 52, the folding plate assembly 53 and the middle plate 51 are covered directly above the placement plate 3. The side wall of the square frame 52 is provided with a plurality of first air holes 54, and the side wall of the folding plate assembly 53 is provided with a plurality of second air holes 55. The shape of the first air hole 54 is adapted to the shape of the second air hole 55, and the diameter of the first air hole 54 is the same as the diameter of the second air hole 55.

[0033] See also Figure 5 As shown, a rotating motor 10 is connected to the edge of the box door 2 and located corresponding to the two lifting columns 4. A cam 9 is provided at the end of the rotating motor 10 and located on the inner wall of the box door 2. The cam 9 and the rotating motor 10 rotate synchronously. A fixed plate 8 is welded in the middle of the two lifting columns 4 and located at the cam 9. The fixed plate 8 contacts the edge of the cam 9. The rotation of the cam 9 drives the fixed plate 8 to rise and fall, so that the four lifting columns 4 and the middle plate 51 can all be lifted and lowered.

[0034] See also Figure 4As shown, the frame area enclosed by the square frame 52 is smaller than the frame area enclosed by the four lifting columns 4, and the area of ​​the square frame 52 is adapted to the area of ​​the folding plate assembly 53, the height of the square frame 52 is adapted to the height of the folding plate assembly 53, the position of the first air hole 54 is aligned with the position of the second air hole 55, and when the lifting stroke of the cam 9 is zero, the first air hole 54 of the square frame 52 and the second air hole 55 of the folding plate assembly 53 coincide with each other, and the hot air flow entering the drying box body 1 will enter the material inside the square frame 52 from the first air hole 54 and the second air hole 55, so that the material placed on the placement plate 3 can be heated and dried.

[0035] See also Figure 6 As shown, the lifting distance of the cam 9 is equal to the lifting height of the middle plate 51, the lifting height of the folding plate assembly 53 is less than the upper and lower hole spacing of the first air hole 54, and the inner wall of the square frame 52 is slidably connected to the outer wall of the folding plate assembly 53, and the first air hole 54 and the second air hole 55 are staggered. When the stroke of the cam 9 is lifted to the maximum, the middle plate 51 and the lifting column 4 are pushed upward to the maximum position by the cam 9, so that the middle plate 51 is in contact with the placement plate 3. At this time, the first air hole 54 of the square frame 52 and the second air hole 55 of the folding plate assembly 53 are staggered with each other, so that the hot air entering the hot air square frame 52 can be covered inside the square frame 52, and the hot air at the material can be prevented from dissipating too quickly, thereby ensuring a better drying effect of the material above the placement plate 3, and a hot air flow can be continuously injected into the square frame 52 to discharge the cold air flow in the middle plate 51. Example 2:

[0036] See also Figure 2 、 Figure 4 and Figure 7As shown, the folding plate assembly 53 includes two groups of connecting bars 531, two groups of first folding plates 532 and two groups of second folding plates 533. The connecting bars 531, the first folding plates 532 and the second folding plates 533 are respectively arranged on opposite sides of the middle plate 51. The two connecting bars 531 are welded to the longitudinal edges of the middle plate 51. The two groups of connecting bars 531 are rotatably connected to the two groups of first folding plates 532 respectively. The second folding plates 533 are arranged at the width edges of the middle plate 51. The first folding plates 532 and the second folding plates 533 are V-shaped, and the rotation angle between the first folding plates 532 and the second folding plates 533 is 0-180°. The second folding plates 533 are rotatably connected to the edge of the middle plate 51. The four edges of the folding plate assembly 53 are provided with a retractable structure 6. The retractable structure 6 includes two first steel wire ropes 61 and two second steel wire ropes 62. The first steel wire rope 61 is connected to the bottom edge of the first folding plate 532, and the second steel wire rope 62 is connected to the bottom edge of the second folding plate 532. The wire rope 62 is connected to the bottom edge of the second folding plate 533. The first wire rope 61 can pull the first folding plate 532, so that the first folding plate 532 changes from a vertical state to a folded state. The second wire rope 62 can pull the second folding plate 533, so that the second folding plate 533 changes from a vertical state to a folded state. A wire transmission hole 63 is provided inside the middle plate 51. The connecting bar 531 and the first folding plate 532 both pass through the wire transmission hole 63, and the two first wire ropes 61 are tied together at one place, and the two second wire ropes 62 are tied together at one place. First, the second wire rope 62 is pulled to fold the second folding plate 533 first, and then the first wire rope 61 is pulled to fold the first folding plate 532. The connecting bar 531 is used to stagger the folded first folding plate 532 and the second folding plate 533 to avoid mutual interference between the first folding plate 532 and the second folding plate 533.

[0037] In this embodiment, the total thickness of the first folding plate 532 and the second folding plate 533 after folding is less than the lifting height of the middle plate 51. The folded second folding plate 533 is located above the folded first folding plate 532. The lifting column 4 is slidably connected to the corner of the placement plate 3. The line uses the cam 9 to push the lifting column 4 and the middle plate 51 to rise, and the gap between the middle plate 51 and the square frame 52 becomes larger. At this time, the total thickness of the folded first folding plate 532 and the second folding plate 533 is less than the lifting height of the middle plate 51, so that the square frame 52 located on the placement plate 3 can be taken out from the middle plate 51, so that the dried material can also be taken out, and the folded first folding plate 532 and the second folding plate 533 will not affect the taking out of the square frame 52. Example 3:

[0038] See also Figure 8As shown, a support structure 7 is provided between the middle plate 51 and the placement plate 3, and the support structure 7 includes a ventilation groove 71, which is opened inside the middle plate 51, and the surfaces of the placement plate 3 and the middle plate 51 are both provided with corresponding connecting holes 72, and a ventilation main pipe 73 is screwed into the connecting hole 72 of the middle plate 51. The ventilation main pipe 73 passes through the inside of the connecting hole 72 of the placement plate 3, and the bottom end of the ventilation main pipe 73 is screwed with the connecting hole 72 of the middle plate 51, so that the air in the ventilation groove 71 can enter the placement plate 3 through the ventilation main pipe 73, and the ventilation main pipe 73 is slidably connected to the connecting hole 72 of the placement plate 3, and the ventilation main pipe 73 can be used to introduce gas to the bottom of the material, and the ventilation main pipe 73 can also press the material to lift the material, and the bottom of the material can also be dried by the hot air flow, and the effect of the material being dried by the hot air flow is better.

[0039] In this embodiment, a ventilation branch pipe 74 is provided at the top of the side wall of the ventilation main pipe 73. The ventilation branch pipe 74 is arranged obliquely on the side wall of the ventilation main pipe 73, and the ventilation branch pipe 74, the ventilation main pipe 73 and the ventilation groove 71 are interconnected. The inclined ventilation branch pipe 74 is used to transport the air flow to the bottom of the side of the material, so that the bottom of the material can also be quickly dried.

[0040] See also Figure 9 As shown, the cylindrical surfaces of the four lifting columns 4 and the limiting rings 75 are welded above the corners of each placement plate 3. The distance between the limiting ring 75 and the intermediate plate 51 is adapted to the height of the intermediate plate 51 when it is raised. The intermediate plate 51 can be limited by fitting between the intermediate plate 51 and the placement plate 3. The intermediate plate 51 can be restricted from continuing to descend by the limiting ring 75 when it is lowered, so as to avoid the collision between the air branch pipe 74 and the connecting hole 72, and to avoid the first air hole 54 of the square frame 52 and the second air hole 55 of the folding plate assembly 53 from being staggered.

[0041] It should be noted that when drying some materials, the materials need to be placed on the placement plate 3 of the drying box body 1, and then the box door 2 is closed and hot air is introduced into the drying box body 1 for drying. When the hot air flows into the placement plate 3, the materials are released before they are fully in contact with the materials on the placement plate 3. At this time, the hot air flow entering the placement plate 3 can be covered by the anti-heat dissipation structure 5. Specifically, the square frame 52 and the materials are placed together in the reserved groove of the placement plate 3, and then the materials are placed in the middle of the square frame 52, and then the tightened first steel wire rope 61 and the second steel wire rope 62 are loosened. At this time, the folding The first folding plate 532 and the second folding plate 533 of the stacking plate assembly 53 are unfolded, so that the first folding plate 532 and the second folding plate 533 are attached to the inner wall of the square frame 52. At this time, the first air vent 54 of the square frame 52 and the second air vent 55 of the folding plate assembly 53 are aligned with each other. After the box door 2 is closed, hot air is introduced into the interior of the drying box body 1. At this time, the hot air can enter the interior of the square frame 52 from the first air vent 54 and the second air vent 55, and the continuous hot air flow can discharge the cold air inside the square frame 52. The hot air inside the square frame 52 can dry the material on the placement plate 3;

[0042] When the hot air flows through the material relatively quickly, the hot air can be covered inside the square frame 52. Specifically, the cam 9 is driven to rotate by the rotating motor 10, so that the cam 9 pushes the fixed plate 8 and the lifting column 4 to rise. At this time, the folding plate assembly 53 below the middle plate 51 slides relative to the square frame 52, and the first air vent 54 of the square frame 52 is staggered with the second air vent 55 of the folding plate assembly 53, so that the hot air flow in the square frame 52 is covered inside the square frame 52. The air flow entering the square frame 52 can have sufficient time to react with the material, so that the hot air flow can fully contact and heat exchange with the material, thereby avoiding the low efficiency of drying the material caused by too fast hot air flow and the slow dissipation of hot air at the material. The rotating motor 10 is repeatedly rotated, so that the middle plate 51 can be repeatedly raised and lowered, so that the first air vent 54 and the second air vent 55 can be controlled to be staggered or aligned, so that the air flow can enter the interior of the square frame 52 or the air flow can temporarily remain in the interior of the square frame 52;

[0043] When the airflow dries the material on the placement plate 3, the material can be supported by the support structure 7 so that the hot air flow can enter the bottom of the material. Specifically, when the middle plate 51 is raised or lowered, the air permeable pipe 73 of the middle plate 51 is raised or lowered along with the middle plate 51, and the bottom of the material can be lifted by using the raised air permeable pipe 73. Since the air permeable groove 71 and the air permeable pipe 73 use each other, the hot air flow can enter the interior of the air permeable pipe 73 from the air permeable pipe 73, so that the hot air flow can blow air to the bottom of the material, and use the air permeable pipe to blow air to the bottom of the material. The tube 73 and the ventilation branch pipe 74 cooperate with each other to blow the air flow in the ventilation main pipe 73 obliquely upward, and can blow to different positions of the bottom of the material, so that different positions of the material can be in contact with the hot air flow, which can accelerate the drying speed of the hot air flow on the material and achieve better heating and drying effects. When the middle plate 51 is lowered, the ventilation main pipe 73 is also lowered. At this time, the limit ring 75 is used to limit the lowering of the lifting column 4, so that the ventilation branch pipe 74 will not collide with the connecting hole 72. At this time, the top ends of the ventilation branch pipe 74 and the ventilation main pipe 73 are flush with the upper surface of the placement plate 3 of the middle plate 51;

[0044] When the heated and dried material needs to be taken out from the placement plate 3, the folding plate assembly 53 is first stored on the lower surface of the middle plate 51. Specifically, the second steel wire rope 62 is pulled to fold the second folding plate 533 and the second folding plate 533 is in contact with the lower surface of the middle plate 51. Then, the first steel wire rope 61 is pulled to fold the first folding plate 532 and the first folding plate 532 is in contact with the lower surface of the second folding plate 533, so that the second folding plate 533 and the first folding plate 532 are in contact with each other. It is folded up, and the first steel wire rope 61 and the second steel wire rope 62 are tied together to prevent the steel wire rope from loosening from the wire transmission hole 63. At this time, the folding plate assembly 53 will not interfere with the taking out of the square frame 52. At this time, the square frame 52 is taken out and the material is also taken out. When the square frame 52 is placed later, the square frame 52 can be placed on the top of the placement plate 3, and then the square frame 52 is aligned with the folding plate assembly 53, so that the folding plate assembly 53 fits against the inner wall of the square frame 52, and the material can be dried again.

[0045] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An energy-saving drying box with an anti-heat dissipation function, comprising a drying box body (1), a box door (2) and a placement plate (3), wherein the placement plate (3) is welded to the interior of the drying box body (1), and the box door (2) is rotatably connected to the drying box body (1) via a hinge; characterized in that: Four lifting columns (4) are provided inside the drying box body (1) and at the corners of the placement plate (3). The bottom ends of the lifting columns (4) are slidably connected to the bottom end of the drying box body (1). An anti-heat dissipation structure (5) is provided inside the drying box body (1) and above each placement plate (3). The anti-heat dissipation structure (5) includes an intermediate plate (51). The intermediate plate (51) is located above the placement plate (3). The lifting columns (4) are welded to the four corners of the intermediate plate (51). A square frame (52) is placed above the plate (3) and between the middle plate (51) and the placement plate (3); a folding plate assembly (53) is provided at the edge of the lower surface of the middle plate (51); the folding plate assembly (53) is attached to the inner wall of the square frame (52); a plurality of first air holes (54) are provided on the side wall of the square frame (52); a plurality of second air holes (55) are provided on the side wall of the folding plate assembly (53); and the shape of the first air holes (54) matches the shape of the second air holes (55); A rotating motor (10) is connected to the edge of the door (2) and at positions corresponding to the two lifting columns (4); a cam (9) is provided at the end of the rotating motor (10) and at the inner wall of the door (2); a fixing plate (8) is welded between the two lifting columns (4) and at the position of the cam (9); the fixing plate (8) is in contact with the edge of the cam (9); the lifting distance of the cam (9) is equal to the lifting height of the intermediate plate (51); A support structure (7) is provided between the intermediate plate (51) and the placement plate (3), and the support structure (7) includes a ventilation groove (71), which is provided inside the intermediate plate (51). The surfaces of the placement plate (3) and the intermediate plate (51) are provided with corresponding connecting holes (72). A ventilation main pipe (73) is screwed onto the connecting hole (72) of the intermediate plate (51), and the ventilation main pipe (73) is slidably connected to the connecting hole (72) of the placement plate (3); a ventilation branch pipe (74) is provided at the top end of the side wall of the ventilation main pipe (73), and the ventilation branch pipe (74) is arranged obliquely on the side wall of the ventilation main pipe (73), and the ventilation branch pipe (74), the ventilation main pipe (73) and the ventilation groove (71) are connected to each other.

2. The energy-saving drying box with anti-heat dissipation function according to claim 1 is characterized in that: The frame area enclosed by the square frame (52) is smaller than the frame area enclosed by the four lifting columns (4), and the area of ​​the square frame (52) is adapted to the area of ​​the folding plate assembly (53), the height of the square frame (52) is adapted to the height of the folding plate assembly (53), and the position of the first air vent (54) is aligned with the position of the second air vent (55).

3. The energy-saving drying box with anti-heat dissipation function according to claim 1 is characterized in that: The lifting height of the folding plate assembly (53) is less than the spacing between the upper and lower holes of the first air vent (54), and the inner wall of the square frame (52) is slidably connected to the outer wall of the folding plate assembly (53), and the first air vent (54) and the second air vent (55) are staggered.

4. The energy-saving drying box with anti-heat dissipation function according to claim 3, characterized in that: The folding plate assembly (53) comprises two groups of connecting bars (531), two groups of first folding plates (532) and two groups of second folding plates (533). The two groups of connecting bars (531) are welded to the longitudinal edges of the middle plate (51). The two groups of connecting bars (531) are rotatably connected to the two groups of first folding plates (532) respectively. The second folding plates (533) are arranged on the width edges of the middle plate (51). The second folding plates (533) are rotatably connected to the edges of the middle plate (51). The folding plate assembly (53) The four edges of the intermediate plate (53) are provided with a retractable structure (6), the retractable structure (6) comprising two first steel wire ropes (61) and two second steel wire ropes (62), the first steel wire rope (61) being connected to the bottom edge of the first folding plate (532), the second steel wire rope (62) being connected to the bottom edge of the second folding plate (533), a wire transmission hole (63) being provided inside the intermediate plate (51), the two first steel wire ropes (61) being tied together at one point, and the two second steel wire ropes (62) being tied together at one point.

5. The energy-saving drying box with anti-heat dissipation function according to claim 4 is characterized in that: The total thickness of the first folding plate (532) and the second folding plate (533) after folding is less than the height of the middle plate (51) when it is lifted and lowered; the folded second folding plate (533) is located above the folded first folding plate (532); and the lifting column (4) is slidably connected to the corner of the placement plate (3).

6. The energy-saving drying box with anti-heat dissipation function according to claim 5, characterized in that: Limiting rings (75) are welded on the cylindrical surfaces of the four lifting columns (4) and above the corners of each placement plate (3). The distance between the limiting rings (75) and the middle plate (51) is adapted to the height of the middle plate (51) when it is lifted or lowered.

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