Artware oven with hot air circulation function

Abstract

The invention relates to the technical field related to handicraft drying, in particular to a handicraft oven with a hot air circulation function, which comprises an oven body, a central column, an expansion cavity plate, a base plate, a bearing module, a turbulence module, a linkage module, an overheating module and a circulation module. By means of dynamic reconstruction of the bearing structure, static compression of the artware is converted into bottom suspension, so that the surface, which has to be shielded due to bearing, of the artware is exposed to hot air in turns, and zero-dead-angle omnidirectional flow field drying is achieved from the physical root; a self-protection mechanism of thermosensitive lifting and cold air intervention is created aiming at the heat accumulation stubborn disease caused by supporting contact point pore sealing, when a contact point is overheated, the artware is automatically lifted upwards to break heat accumulation microclimate, cold air is introduced to suppress local temperature rise, the hidden danger of local coking is thoroughly eradicated, and the drying yield is increased to a higher position.

Description

Technical Field

[0001] This invention relates to the technical field of drying handicrafts, and in particular to a handicraft oven with hot air circulation function. Background Technology

[0002] Drying is one of the most crucial steps in the manufacturing process of handicrafts. Handicrafts are made from a variety of materials, commonly including wood, bamboo, straw, ceramics, clay, resin, and various composite materials. After molding, coating, or dyeing, these materials often contain a certain amount of moisture or solvents inside or on their surface. To ensure the structural stability of the handicrafts, prevent mold, cracking, or deformation caused by excessive humidity, and guarantee the gloss and adhesion of the cured surface coating, the handicrafts need to undergo a drying process.

[0003] In existing craft drying processes, such as Chinese Patent Publication No. CN223735272U, a high-efficiency resin craft air-drying device is disclosed, including an air-drying box, a box door, a partition, a first motor, a support frame, a second motor, a support circular plate, a gear ring, a drive gear, a transmission shaft, a protective cover, an air inlet duct, and a fan.

[0004] In the aforementioned prior art, two sets of support frames are mainly set on both sides of the partition, with multiple support frames on each side of the partition, allowing multiple resin crafts to be dried simultaneously. However, the aforementioned prior art does not take into account the unavoidable physical obstruction formed at the contact surface between the crafts and the support frames, preventing hot air from penetrating and turning the support points into "airflow blind spots." This fatal flaw of the support points not only leaves difficult-to-eliminate drying dead zones, but also significantly reduces the convective heat dissipation efficiency at the contact points due to airflow obstruction, easily causing localized heat accumulation and directly resulting in the yellowing and ruin of delicate crafts such as straw weaving.

[0005] Therefore, there is still room for improvement in the aforementioned existing technologies. Summary of the Invention

[0006] To eliminate blind spots in the drying of handicrafts, this application provides a handicraft oven with hot air circulation function.

[0007] The craft oven with hot air circulation function provided in this application adopts the following technical solution:

[0008] An oven for handicrafts with hot air circulation includes a cabinet with a hollow central column rotatably mounted inside via an electric drive unit. An expansion cavity plate and a base plate are sequentially mounted on the central column from top to bottom. The hollow expansion cavity plate is connected to the central column. A support module is evenly disposed on the base plate to provide variable contact point support for the handicrafts, eliminating drying dead zones. A turbulence module is evenly disposed below the expansion cavity plate. The turbulence module cooperates with the support module via a linkage module, switching the airflow between laminar and turbulent flow as the contact point between the support module and the handicraft changes. A superheating module is disposed inside the support module to sense temperature changes and guide airflow to cool down when the temperature is too high. A circulation module is disposed at the bottom of the cabinet to guide hot air circulation.

[0009] Preferably, the substrate has uniformly formed pores, which allow gas flow and increase air permeability.

[0010] Preferably, the supporting module includes a movable block slidably disposed in a sliding groove opened in the substrate, a spring connecting the movable block and the sliding groove, the spring having a reset function, and multiple movable blocks arranged in a ring; a support column mounted on the movable block, with a first supporting member installed at the top of the support column, multiple first supporting members forming a circular supporting structure that can expand and converge to support the handicraft (mainly for straw woven flower baskets, whose basket body is arc-shaped; when the first supporting member expands, it is equivalent to the inner diameter of the circular supporting structure increasing, the straw woven flower basket descending, thus realizing the change of the support point for the straw woven flower basket); a telescopic drive mounted on the lower end of the substrate via a mounting bracket, the output end of the telescopic drive being mounted with a second supporting member via a mounting rod, the telescopic drive being an existing electrical device, the second supporting member supporting the bottom of the handicraft, playing a role in maintaining the shape of the handicraft in the early stage of drying and preventing its deformation; and an extension mechanism disposed on the substrate.

[0011] Preferably, the first support member is a hollow short rod with an arc shape, and the first support member is provided with a first air hole evenly distributed on the first support member; the second support member is provided with a second air hole evenly distributed on the second support member. Both the first air hole and the second air hole play a role in increasing air permeability and reducing the area of ​​blockage on the handicraft when supporting it.

[0012] Preferably, the expansion mechanism includes a rotating sleeve rotatably mounted on a base plate, the inside of which is provided with a torsion groove, and the outer periphery of which is uniformly provided with extrusion protrusions; an extrusion member mounted on a moving block, the extrusion member and the extrusion protrusions being in an extrusion fit; and a torsion pin mounted on a mounting rod, the outer end of which is located in the torsion groove.

[0013] Preferably, the torsion groove includes an upper straight section, an inclined section, and a lower straight section from top to bottom. The torsion pin is initially located in the upper straight section. When the torsion pin descends into the inclined section, the rotating sleeve is squeezed and rotated. When the torsion pin moves from the inclined section into the lower straight section, the rotating sleeve no longer rotates.

[0014] Preferably, the turbulence module includes a jet nozzle mounted on the lower surface of the expansion cavity plate; a guide plate rotatably mounted on the lower side wall of the jet nozzle, with a second spring connecting the guide plate and the jet nozzle, the second spring acting as a reset mechanism. In its initial state, the guide plate is vertically downward, parallel to the direction of the hot airflow, and does not significantly affect the airflow; an auxiliary rod mounted on the outer end of the guide plate; a reel rotatably mounted on the outer periphery of the jet nozzle, with a third spring connecting the reel and the jet nozzle, the third spring acting as a reset mechanism; and a pusher mounted on the lower end of the reel, with the pusher and the auxiliary rod in a pressing fit.

[0015] Preferably, the linkage module includes a linkage plate slidably disposed on a base plate, with a spring four connected between the linkage plate and the base plate, the spring four serving a reset function; a linkage push rod mounted on a moving block, the linkage push rod and the linkage plate being in a pressing fit; a fixed pulley rotatably disposed on the base plate, the fixed pulley serving to change the direction of the force; and a connecting cable, one end of which is connected to the linkage plate, and the other end of which passes through the fixed pulley and is connected to a reel.

[0016] Preferably, to prevent heat accumulation in the support area, this application provides an overheating module. The overheating module includes a bimetallic strip fixed inside the first support member. The bimetallic strip is a prior art material, a composite material composed of two or more metals or other materials with suitable properties. Due to the different thermal expansion coefficients of the component layers, when the temperature changes, the deformation of the active layer is greater than that of the passive layer, causing the bimetallic strip to bend towards the passive layer. A lever is disposed inside the first support member, which amplifies the stroke. The bimetallic strip contacts the rear end of the lever. An ejector sleeve is installed inside the support column; an ejector component is slidably disposed within the ejector sleeve, and a spring five connects the ejector component and the ejector sleeve, with the spring five always exerting an upward pushing force on the ejector component; a limiting latch is slidably disposed on the side wall of the ejector sleeve, with a chamfer at the upper end of the limiting latch, and a spring six connects the limiting latch and the ejector sleeve, with the spring six acting as a reset mechanism; a limiting slot is formed on the outer periphery of the ejector component, and the limiting latch and the limiting slot are engaged; a release rod is installed at one end on the side wall of the limiting latch, and the other end of the release rod is engaged with the front end of the lever component; and a drainage mechanism is disposed within the base plate.

[0017] Preferably, the drainage mechanism includes a cold air duct disposed in the central column, a cold air outlet at the top of the cold air duct, a slidable opening and closing plate in the cold air outlet, and a spring seven connected between the opening and closing plate and the cold air outlet, the spring seven serving a reset function; a trigger rod slidably disposed in the base plate, one end of the trigger rod contacting the opening and closing plate, a through hole one on the ejector sleeve, and a through hole two on the ejector component, both the through hole one and the through hole two corresponding to the position of the trigger rod; and a clearance hole corresponding to the position of the trigger rod on the support column. Under normal conditions, when the moving block moves, the trigger rod smoothly passes through the clearance hole, the through hole one, and the through hole two. When the ejector component moves upward, the through hole two is misaligned with the trigger rod, and when the moving block moves, the trigger rod will be squeezed.

[0018] In summary, the beneficial technical effects of this application are as follows:

[0019] The present invention discloses a craft oven with hot air circulation function, which transforms the craft from "static pressure" to "bottom suspension" through dynamic reconstruction of the support structure. This allows the surfaces of the craft that were previously covered by the support to be exposed to hot air in turn, achieving "zero dead angle" omnidirectional flow field drying from a physical source. In response to the persistent problem of heat accumulation caused by the pores of the support contact point, a self-protection mechanism of heat-sensitive lifting and cold air intervention is created. When the contact point is overheated, the craft is automatically lifted to break the heat accumulation microclimate, and cold air is introduced to suppress local temperature rise, completely eliminating the risk of local scorching and pushing the drying yield to a higher level. Attached Figure Description

[0020] Figure 1 This is a first three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 This is a cross-sectional view of the structure between the support module, turbulence module, linkage module, and overheating module of the present invention;

[0023] Figure 4 This is a structural schematic diagram of the support module of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure between the extended mechanism and the linkage module of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure between the rotating sleeve, the torsion groove, and the torsion locking pin of the present invention;

[0026] Figure 7 This is the present invention. Figure 3 A magnified view of part A;

[0027] Figure 8This is a structural schematic diagram of the support module and overheating module of the present invention;

[0028] Figure 9 This is a schematic diagram of the overheating module of the present invention;

[0029] Figure 10 This is the present invention. Figure 3 A magnified view of section B;

[0030] Figure 11 This is a schematic diagram of the trigger rod, through hole one, through hole two, and avoidance hole of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Central column; 3. Expansion cavity plate; 4. Base plate; 5. Support module; 6. Turbulence module; 7. Linkage module; 8. Overheating module; 9. Circulation module; 11. Electric drive unit; 51. Moving block; 52. Sliding groove; 53. Support column; 54. First support component; 55. Telescopic drive; 56. Mounting bracket; 57. Mounting linkage; 58. Second support component; 59. Expansion mechanism; 61. Injection nozzle; 62. Guide plate; 63. Auxiliary rod; 64. Wire wheel; 65. Pushing component; 71. Linkage plate; 72. Linkage 73. Push rod; 74. Fixed pulley; 85. Connecting cable; 86. Bimetallic strip; 87. Lever; 88. Ejector sleeve; 89. Ejector; 80. Limiting clip; 81. Release rod; 82. Drainage mechanism; 53. First air hole; 54. Second air hole; 55. Rotating sleeve; 56. Torsion groove; 57. Extrusion protrusion; 58. Extrusion part; 59. Torsion pin; 89. Through hole one; 89. Limiting clip groove; 89. Through hole two; 80. Cold air duct; 89. Opening and closing plate; 89. Trigger rod; 80. Clearance hole. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-11 This application will be described in further detail.

[0033] This application discloses a craft oven with hot air circulation function. By gradually changing the support position of the craft, the craft is in a dynamic support state, eliminating fixed support contact points, and ensuring that the craft is fully in contact with the hot air, leaving no dead corners in the drying process.

[0034] Reference Figure 1 , Figure 2As shown, a craft oven with hot air circulation function includes a cabinet 1, inside which a hollow central column 2 is rotatably mounted via an electric drive unit 11. An expansion cavity plate 3 and a base plate 4 are sequentially mounted on the central column 2 from top to bottom. The hollow expansion cavity plate 3 is connected to the central column 2. A support module 5 is evenly disposed on the base plate 4 to provide variable contact point support for the crafts, eliminating drying dead zones. A turbulence module 6 is evenly disposed below the expansion cavity plate 3. The turbulence module 6 cooperates with the support module 5 via a linkage module 7, and switches the airflow between laminar and turbulent flow as the contact point between the support module 5 and the crafts changes. A superheating module 8 is disposed inside the support module 5 to sense temperature changes and guide airflow to cool down when the temperature is too high. A circulation module 9 is disposed at the bottom of the cabinet 1 to guide hot air circulation.

[0035] In actual operation, the chamber 1 is opened, and the handicrafts to be dried are placed on the support module 5. The support module 5 provides multi-point stable support for the bottom and outer periphery of the handicrafts. Then, the chamber 1 is closed, and drying begins. Hot air passes through the central column 2 and the expansion cavity plate 3 before being ejected from the turbulence module 6. Initially, the hot air is a vertically downward laminar flow, which performs preliminary overall drying on the handicrafts on the support module 5. Subsequently, the support module 5 gradually changes its support position on the handicrafts, suspending the bottom of the handicrafts to enhance the flow of hot air and put the handicrafts in a dynamic support state, resulting in more uniform contact with the hot air. At the same time, when the support module 5 changes its support position, it also triggers the turbulence module 6 through the linkage module 7 to change the vertically downward laminar flow of hot air to... The downward rotating turbulent hot air mixes and stirs the hot air inside the chamber 1, making the temperature and airflow more uniform throughout the drying area. This ensures that all parts of the handicraft dry simultaneously. For handicrafts with porous structures such as straw weaving, the turbulent "disturbance" can "stir" the straw fibers, allowing hot air to penetrate into the straw weave and accelerate the evaporation of internal moisture. The overheating module 8 detects the temperature at the contact point between the support module 5 and the handicraft. In case of overheating, the overheating module 8 lifts and clamps the handicraft to increase the heat dissipation area and prevent damage. The existing circulation module 9 controls the hot air circulation throughout the process to increase heat utilization. This application changes the support position of the handicraft and reduces the support area, so that all surfaces of the handicraft can be fully exposed to the hot air, resulting in more uniform drying.

[0036] Reference Figure 1 As shown, the substrate 4 has uniformly opened pores, which allow gas to flow and increase air permeability.

[0037] Reference Figure 3 , Figure 4As shown, the supporting module 5 includes a movable block 51, which is slidably disposed in a sliding groove 52 opened in the substrate 4. A spring is connected between the movable block 51 and the sliding groove 52. The spring has a reset function. Multiple movable blocks 51 are arranged in a ring. A support column 53 is mounted on the movable block 51. A first supporting member 54 is installed at the top of the support column 53. Multiple first supporting members 54 form a circular supporting structure that can expand and converge. This is suitable for handicrafts (mainly straw woven flower baskets, whose basket body is arc-shaped). When the first supporting member 54 expands... When opened, it is equivalent to the inner diameter of the circular support structure increasing, and the straw basket descends, thus realizing the change of the support point of the straw basket; the telescopic drive 55 is installed at the lower end of the base plate 4 through the mounting bracket 56, and the output end of the telescopic drive 55 is equipped with a second support member 58 through the mounting link 57. The telescopic drive 55 is an existing electrical device. The second support member 58 supports the bottom of the craft and plays a role in maintaining the shape of the craft and preventing its deformation in the early stage of drying; the extension mechanism 59 is set on the base plate 4.

[0038] Reference Figure 4 As shown, the first support member 54 is a hollow short rod with an arc shape, and the first support member 54 is provided with a first air hole 541 evenly; the second support member 58 is provided with a second air hole 581 evenly. The first air hole 541 and the second air hole 581 both play the role of increasing air permeability and reducing the area of ​​blockage on the handicraft when supporting it.

[0039] Reference Figure 5 , Figure 6 As shown, the expansion mechanism 59 includes a rotating sleeve 591, which is rotatably mounted on the base plate 4. The rotating sleeve 591 has a torsion groove 592 inside, and extrusion protrusions 593 are uniformly installed on the outer periphery of the rotating sleeve 591; an extrusion member 594, which is mounted on the moving block 51, and the extrusion member 594 and the extrusion protrusions 593 are in an extrusion fit; and a torsion pin 595, which is mounted on the mounting rod 57, and the outer end of the torsion pin 595 is located in the torsion groove 592.

[0040] Reference Figure 6 As shown, the torsion groove 592 includes an upper straight section, an inclined section and a lower straight section from top to bottom. The torsion pin 595 is initially located in the upper straight section. When the torsion pin 595 descends into the inclined section, the rotating sleeve 591 is squeezed and rotated. When the torsion pin 595 enters the lower straight section from the inclined section, the rotating sleeve 591 no longer rotates.

[0041] In actual use, the first support 54 supports the outer periphery of the craft, and the second support 58 supports the bottom of the craft. Hot air pre-dries the craft. After a specified time, the telescopic drive 55 drives the second support 58 to descend via the mounting rod 57. The torsion pin 595 moves downward with the mounting rod 57. The torsion pin 595 presses the torsion groove 592, causing the rotating sleeve 591 to rotate. The rotating sleeve 591 drives the extrusion convex angle 593 to rotate. The extrusion convex angle 593 presses the extrusion piece 594, thereby pushing the moving block 51 to move and spread out, thus changing the support point of the craft.

[0042] The support point of the handicraft is changed to intermittent operation. The telescopic drive 55 drives the second support 58 to descend a certain distance in one go. After drying for a certain period of time, the second support 58 is moved again to descend a certain distance. After multiple times, the second support 58 is completely detached from the bottom surface of the handicraft, leaving only the first support 54 to support the outer perimeter of the handicraft. At this time, the handicraft is transparent from top to bottom, which is more conducive to hot air drying.

[0043] Reference Figure 7 As shown, the turbulence module 6 includes a jet nozzle 61, which is installed on the lower surface of the expansion cavity plate 3; a guide plate 62, which is rotatably mounted on the lower side wall of the jet nozzle 61, and a second spring is connected between the guide plate 62 and the jet nozzle 61, which serves as a reset function. In the initial state, the guide plate 62 is vertically downward and parallel to the direction of the hot air flow, so as not to have too much impact on the air flow; an auxiliary rod 63, which is installed on the outer end of the guide plate 62; a reel 64, which is rotatably mounted on the outer periphery of the jet nozzle 61, and a third spring is connected between the reel 64 and the jet nozzle 61, which serves as a reset function; and a pusher 65, which is installed on the lower end of the reel 64, and the pusher 65 and the auxiliary rod 63 are in a pressing fit.

[0044] Reference Figure 3 , Figure 5 , Figure 7 As shown, the linkage module 7 includes a linkage plate 71, which is slidably mounted on the base plate 4. A spring 4 is connected between the linkage plate 71 and the base plate 4, and the spring 4 plays a reset role; a linkage push rod 72, which is mounted on the moving block 51, and the linkage push rod 72 and the linkage plate 71 are in a pressing fit; a fixed pulley 73, which is rotatably mounted on the base plate 4, and the fixed pulley 73 plays a role in changing the direction of the force; and a connecting cable 74, one end of which is connected to the linkage plate 71, and the other end of the connecting cable 74 is connected to the reel 64 after passing through the fixed pulley 73.

[0045] In actual operation, when the moving block 51 moves and expands, the linkage push rod 72 moves with the moving block 51 and pushes the linkage plate 71 to move, thereby pulling the connecting cable 74 to move. The connecting cable 74 pulls the spool 64 to rotate. The rotating spool 64 causes the pusher 65 to squeeze the auxiliary rod 63. The squeezed auxiliary rod 63 causes the guide plate 62 to rotate, thereby disturbing the airflow of the jet nozzle 61 and forming a rotating turbulent flow.

[0046] Reference Figure 8 , Figure 9 As shown, to prevent heat accumulation in the support area, this application provides an overheating module 8. The overheating module 8 includes a bimetallic strip 81, which is fixed inside the first support member 54. The bimetallic strip 81 is existing technology. The bimetallic strip is a composite material composed of two or more metals or other materials with suitable properties. Due to the different thermal expansion coefficients of the component layers, when the temperature changes, the deformation of the active layer is greater than that of the passive layer, so the bimetallic strip will bend towards the passive layer side. A lever member 82 is disposed inside the first support member 54. The lever member 82 amplifies the stroke. The bimetallic strip 81 contacts the rear end of the lever member 82. An ejector sleeve 83 is installed on the support column 5. The interior of component 3 includes: an ejector 84, which slides vertically within the ejector sleeve 83; a spring 5 connecting the ejector 84 and the ejector sleeve 83, which always pushes the ejector 84 upwards; a limiting latch 85, which slides on the side wall of the ejector sleeve 83; a chamfer at the upper end of the limiting latch 85; a spring 6 connecting the limiting latch 85 and the ejector sleeve 83, which resets the ejector; a limiting slot 841 on the outer periphery of the ejector 84; a release rod 86, one end of which is mounted on the side wall of the limiting latch 85; and a flow guiding mechanism 87, which is disposed within the base plate 4.

[0047] Reference Figure 10 , Figure 11As shown, the drainage mechanism 87 includes a cold air duct 871, which is disposed in the central column 2. A cold air outlet is provided at the top of the cold air duct 871. A hinged plate 872 is slidably disposed in the cold air outlet. A spring 7 is connected between the hinged plate 872 and the cold air outlet, and the spring 7 plays a reset role. A trigger rod 873 is slidably disposed in the base plate 4. One end of the trigger rod 873 contacts the hinged plate 872. A through hole 831 is provided on the ejector sleeve 83, and a through hole 84 is provided on the ejector member 84. 2. The through hole 1 831 and through hole 2 842 are both located corresponding to the position of the trigger rod 873. The support column 53 is provided with a clearance hole 531 corresponding to the position of the trigger rod 873. Under normal conditions, when the moving block 51 moves, the trigger rod 873 passes smoothly through the clearance hole 531, through hole 1 831 and through hole 2 842. When the ejector 84 moves upward, through hole 2 842 is misaligned with the trigger rod 873. At this time, when the moving block 51 moves, the trigger rod 873 will be squeezed.

[0048] During actual heat dissipation, the bimetallic strip 81 deforms and presses the rear end of the lever 82 when it reaches the critical temperature. The lever 82 amplifies this deformation, and the front end of the lever 82 presses the release rod 86, causing it to pull the limit card 85 out of the limit card slot 841. The ejector 84 is unlocked, and under the action of the spring, the ejector 84 is pushed upward. All the ejector parts 84 work together to lift the craft upward, separating it from the first support part 54, thereby increasing the heat dissipation area and allowing the accumulated heat to be quickly carried away by the flowing air. At the same time, after the ejector part 84 moves upward, the through hole 842 is misaligned with the trigger rod 873. Then, when the moving block 51 moves, the trigger rod 873 is pressed and moved, and the opening and closing plate 872 is pressed open by the moving trigger rod 873. Cold air is pumped into the cold air pipe 871, which lowers the temperature inside the box 1 and prevents damage to the shape of the craft.

[0049] Straw itself is a porous material with good air permeability, allowing hot air to flow through the pores and carry away moisture and heat (convection cooling). However, when a support (such as a metal or plastic frame) presses down on the straw, the pores are partially or completely sealed, preventing air from circulating between the straw and the support. This significantly reduces the efficiency of convection cooling, potentially leading to heat buildup (the drying temperature for handicrafts is around 50 degrees Celsius, which will not damage the handicrafts; however, heat buildup may cause the surface of the handicrafts to turn yellowish-brown, affecting their quality).

[0050] The implementation principle of this embodiment is as follows:

[0051] Step 1: Place the craft item on the support module 5. The first support component 54 and the second support component 58 together fix the shape of the craft item.

[0052] Step 2: Hot air is output vertically downward from nozzle 61 in a laminar flow for preliminary drying;

[0053] Step 3: The telescopic drive 55 drives the second support 58 to descend. At the same time, the rotating sleeve 591 rotates, and the squeezing convex corner 593 pushes the moving block 51 to expand outward. The first support 54 then expands, changing the contact point of the support on the outer periphery of the craft.

[0054] Step 4: When the moving block 51 expands outward, the linkage push rod 72 pushes the linkage plate 71 to pull the connecting cable 74, which drives the spool 64 to rotate. The pusher 65 squeezes the auxiliary rod 63 to deflect the guide plate 62, and the airflow switches from laminar flow to rotating turbulent flow.

[0055] Step 5: If local heat accumulates at the support point, the bimetallic strip 81 inside the first support 54 will bend due to heat, unlocking the ejector 84. The ejector 84 will lift the entire craftwork away from the first support 54, expanding the heat dissipation area and breaking the heat accumulation zone. At the same time, it will trigger the opening and closing plate 872 to open, allowing the cold air pipe 871 to introduce cold air for forced cooling.

[0056] Step Six: Once drying is complete, remove the craftwork.

[0057] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A craft oven with hot air circulation function, characterized in that, include: The housing has a hollow central column that is rotatably mounted inside via an electric drive unit. An expansion cavity plate and a base plate are installed sequentially from top to bottom on the central column. The expansion cavity plate of the hollow structure is connected to the central column. The support module is evenly arranged on the substrate to support the handicrafts with variable contact points, thereby eliminating drying dead corners. The turbulence module is evenly arranged below the expansion cavity plate. The turbulence module cooperates with the support module through the linkage module, and the airflow switches between laminar and turbulent flow as the contact point between the support module and the workpiece changes. An overheating module, which is located inside the support module, is used to sense the temperature change of the support module and to drain and cool it when the temperature is too high. The circulation module, located at the bottom of the housing, guides the circulation of hot air.

2. A craft oven with hot air circulation function according to claim 1, characterized in that, The substrate has uniformly formed air holes.

3. A craft oven with hot air circulation function according to claim 2, characterized in that, The supporting module includes: The movable block is slidably disposed in a sliding groove opened in the substrate, and a spring is connected between the movable block and the sliding groove. Multiple movable blocks are arranged in a ring. A support column is mounted on the movable block, and a first support is installed at the top of the support column; The stretching drive is mounted on the lower end of the substrate via a mounting bracket, and the output end of the stretching drive is mounted with a second support via a mounting rod. An extension mechanism is mounted on the substrate.

4. A craft oven with hot air circulation function according to claim 3, characterized in that, The first support member is a hollow short rod with an arc shape, and the first support member has a first air hole evenly distributed on it; the second support member has a second air hole evenly distributed on it.

5. A craft oven with hot air circulation function according to claim 3, characterized in that, The extended mechanism includes: A rotating sleeve is rotatably mounted on a base plate. A torsion groove is provided inside the rotating sleeve, and extrusion protrusions are evenly installed on the outer circumference of the rotating sleeve. The extrusion component is mounted on the moving block, and the extrusion component and the extrusion convex corner are in an extrusion fit. A torsion pin is installed on the mounting rod, with its outer end located in a torsion groove.

6. A craft oven with hot air circulation function according to claim 5, characterized in that, The torsion groove includes, from top to bottom, an upper straight section, an inclined section, and a lower straight section.

7. A craft oven with hot air circulation function according to claim 3, characterized in that, The turbulence module includes: The injection port is installed on the lower surface of the expansion chamber plate; A guide vane is rotatably mounted on the lower side wall of the injection nozzle, and a spring is connected between the guide vane and the injection nozzle. An auxiliary rod is installed at the outer end of the deflector; The reel rotates around the outer periphery of the nozzle, and a spring connects the reel to the nozzle. The pusher is installed at the lower end of the reel, and the pusher and the auxiliary rod are in a compression fit.

8. A craft oven with hot air circulation function according to claim 7, characterized in that, The linkage module includes: A linkage plate is slidably mounted on a base plate, and a spring connects the linkage plate and the base plate. The linkage push rod is mounted on the moving block, and the linkage push rod and the linkage plate are in a pressing fit. A fixed pulley, whose rotation is mounted on a base plate; The connecting cable has one end connected to the linkage plate and the other end connected to the spool after passing through the fixed pulley.

9. A craft oven with hot air circulation function according to claim 3, characterized in that, The overheating module includes: A bimetallic strip is fixed inside the first support member; A lever component is located inside the first support component, and a bimetallic strip contacts the rear end of the lever component; An ejector sleeve is installed inside the support column; The ejector is slidably disposed in the ejector sleeve, and a spring is connected between the ejector and the ejector sleeve. The limiting clip is slidably disposed on the side wall of the ejector sleeve. The upper end of the limiting clip is chamfered. A spring is connected between the limiting clip and the ejector sleeve. A limiting groove is provided on the outer periphery of the ejector. The limiting clip and the limiting groove are engaged in a snap-fit ​​relationship. The release lever has one end installed on the side wall of the limit clamp, and the other end of the release lever is engaged with the front end of the lever. The drainage mechanism is located in the substrate.

10. A craft oven with hot air circulation function according to claim 9, characterized in that, The drainage mechanism includes: The cold air duct is installed in the central column. A cold air outlet is installed at the top of the cold air duct. A hinged plate is slidably installed in the cold air outlet. A spring is connected between the hinged plate and the cold air outlet. A trigger rod is slidably disposed in the base plate. One end of the trigger rod contacts the opening and closing plate. A through hole one is provided on the ejector sleeve, and a through hole two is provided on the ejector component. Both the through hole one and the through hole two correspond to the position of the trigger rod. An avoidance hole corresponding to the position of the trigger rod is provided on the support column.

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