An electric dryer capable of uniform heating

Abstract

This invention discloses an electric heating dryer capable of uniform heating, relating to the field of electric heating dryers. It includes an outer drying chamber with an insulated inner chamber installed inside. A motor is connected to the top of the outer drying chamber, and an output rod is connected to the output end of the motor. The output rod extends into the interior of the insulated inner chamber and connects to multiple sets of limiting mechanisms, each set of limiting mechanisms having a drying tray mounted on it. A pneumatic chamber is installed on the back of the insulated inner chamber, and a fixed frame is rotatably connected inside the pneumatic chamber. During the filtration process, the adsorption filter element absorbs moisture from the flowing air. When the motor drives the multiple drying trays to rotate, it also drives the cam rod at the bottom to rotate. The rotation of the cam rod causes the slide rod to move left and right, thereby causing the extrusion plate to slide and extrude moisture from the outside of the adsorption filter element, facilitating the adsorption filter element's absorption of more moisture.

Description

Technical Field

[0001] This invention relates to the field of electric heating dryers, specifically to an electric heating dryer capable of uniform heating. Background Technology

[0002] An electric heating dryer is a device that uses electrical energy to convert into heat energy, which heats the air and circulates it to the material to achieve dehydration and drying. It is widely used in industrial, agricultural, and household applications. Existing electric heating dryers have built-in heating elements (such as resistance wires, PTC heaters, quartz heating tubes, etc.). When powered on, the electrical energy is directly converted into heat energy through the thermal effect of the current. The heat is then mixed with the airflow through an airflow guiding structure to reach a suitable preset temperature. The appropriate hot airflow is then injected into the dryer to dry the raw materials.

[0003] Existing technology, such as Chinese Patent No. CN216482011U, discloses a food dryer with uniform heating, including a dryer, a control panel fixedly installed on one side of the outer wall of the dryer, a drive motor fixedly installed on the upper part of the outer wall of the dryer, heating mechanisms provided on both sides of the inner wall of the dryer, a rotating mechanism fixedly installed on the inner side of the dryer, a feeding mechanism placed on one side of the rotating mechanism, a hinge fixedly installed on one side of the outer wall of the dryer, a protective door fixedly installed on one side of the hinge, and a collecting mechanism provided at one end of the dryer.

[0004] However, when drying equipment is used, it only needs to consider how to handle the moisture in the dried product. But for some products (such as plastic parts, anti-corrosion materials, etc.), some polluting gases (such as formaldehyde) are generated during the heating process of the workpiece during drying. Although the existing technology uses exhaust gas treatment equipment to collect the generated waste gas during the drying process, the existing exhaust gas treatment equipment is usually a fixed sealed core structure. During use, the filter element can easily absorb a large amount of moisture, resulting in low filter element gas passage efficiency, affecting gas flow, and thus affecting subsequent heating. Secondly, the heating process is usually divided into multiple steps: heating, heat preservation, low temperature circulation, and cooling. The existing technology usually uses internal and external exchange circulation heat preservation during the circulation process. This process can cause the temperature to drop too quickly, requiring reheating and causing energy waste. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide an electric heating dryer that can heat evenly, so as to solve the technical problems of water adsorption in the filter element affecting airflow and rapid cooling during the low-temperature cycle of the equipment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an electric heating dryer capable of uniform heating, comprising an outer drying chamber, an inner insulated chamber installed inside the outer drying chamber, a motor connected to the top of the outer drying chamber, an output rod connected to the output end of the motor, and the output rod extending into the inner insulated chamber and connected to multiple sets of limiting mechanisms, each set of limiting mechanisms having a drying tray installed on it, a pneumatic chamber installed on the back of the inner insulated chamber, a fixed frame rotatably connected inside the pneumatic chamber, and multiple sets of fans installed on the inner wall of the fixed frame. Air inlet slots are provided on both sides of the pneumatic chamber. Heating tubes are installed on both sides of the back of the insulated inner box. The inner walls of the drying outer box and the insulated inner box are equipped with a lower sealing plate and an upper sealing plate. Adsorption filter elements are connected to the corners of the lower sealing plate and the upper sealing plate. The bottom end of the motor extends to the bottom of the insulated inner box and is connected to a cam rod. A slide rod is sleeved at the bottom end of the cam rod. Both sides of the slide rod extend to the outside of the lower sealing plate, and two sets of extrusion plates are installed at each end of the slide rod. The two sets of extrusion plates clamp the outside of the adsorption filter element.

[0007] By adopting the above technical solution, the drying trays placed in the insulated inner box can be dried and blown evenly. During the drying process, the adsorption filter can absorb water vapor, thereby improving the drying effect.

[0008] The invention is further configured such that a base is connected to the bottom of the drying outer box, a cover is installed on the outside of the drying outer box, the cover is used to seal the heat-insulating inner box, and a control device is connected to the side of the drying outer box.

[0009] Preferably, it facilitates the adjustment and control of the drying outer box.

[0010] The present invention is further configured such that the top, bottom, sides and back of the insulated inner box are all spaced apart from the drying outer box, the connection between the insulated inner box and the drying outer box is aligned with the cover door, and the inside of the cover door is hollow and insulated.

[0011] Preferably, the insulated inner box can be easily opened by covering the door, and the door can also reduce heat waste.

[0012] The invention is further configured such that air inlet slots are provided on both sides of the pneumatic chamber, the air inlet slots are aligned with the electronic controller, and an exhaust slot is provided on the inner side of the pneumatic chamber, and the exhaust slot is connected to the interior of the insulated inner box.

[0013] Preferably, it allows airflow to easily enter the pneumatic chamber and then enter the insulated inner box through the exhaust channel.

[0014] The invention is further configured such that a drive cylinder is connected to the top of the pneumatic chamber, a transmission rod is connected to the output end of the drive cylinder, a groove is provided in the middle of the transmission rod, a toothed plate is installed on the side of the groove, a transmission tooth is installed on the inner side of the groove, the transmission tooth is connected to the fixed frame, and a sealing plate is installed on both sides of the transmission rod, and the sealing plate is attached to the outer side of the air inlet groove when moving.

[0015] Preferably, the toothed plate and the sealing plate can be moved to change the angle of the fixing frame and seal the air intake groove through the sealing plate.

[0016] The present invention is further configured such that clamping rods are connected to both ends of the slide rod, two sets of extrusion plates are symmetrically fixed to the inner wall of the clamping rods, and a second sliding plate is provided at the middle position of the slide rod. The second sliding plate is perpendicular to the slide rod and a guide groove is provided on the inner wall of the second sliding plate. The second sliding plate is connected to the cam rod through the guide groove.

[0017] Preferably, the clamping rod can drive the extrusion plate to move, thereby extruding and removing water from the adsorption filter element.

[0018] The present invention is further configured such that both ends of the lower sealing plate are provided with lower angle baffles, both ends of the upper sealing plate are provided with upper angle baffles, and both the lower angle baffles and the upper angle baffles are attached to the outer wall of the heat-insulating inner box. The inner wall of the lower angle baffle is provided with a pulley, the sliding rod slides above the pulley, and the inner side of the pulley is provided with a through hole.

[0019] Preferably, the inside of the drying chamber can be easily isolated, so that the airflow only passes through the adsorption filter.

[0020] The present invention is further configured such that multiple sets of limiting rings are connected to the outer side of the output rod, and a support rod is fixedly connected to the outer side of each set of limiting rings. A first sliding plate is slidably connected to the top of the support rod, and a rear locking plate and an outer locking plate are connected to the top of the first sliding plate. The drying tray is fixed between the rear locking plate and the outer locking plate.

[0021] Preferably, the skateboard can be easily installed, and after installation, it can be fixed by a snap-fit ​​plate.

[0022] The present invention is further configured such that a limiting baffle is connected to the middle position of the outer wall of the support rod, the first slide plate is symmetrically arranged in two parts, and a locking piece is connected to the inner end of the first slide plate, and a hook is also connected to the end of the first slide plate.

[0023] Preferably, the position of the skateboard can be easily limited by a limiting stop.

[0024] In summary, the present invention has the following main beneficial effects:

[0025] This invention, through the design of an insulated inner chamber, a motor, an adsorption filter element, an extrusion plate, and a sliding rod, allows the adsorption filter element to absorb moisture from the flowing air during the filtration process. Furthermore, as the motor drives multiple drying discs to rotate, it also drives the cam rod at the bottom to rotate. The rotation of the cam rod causes the sliding rod to move left and right, thereby causing the extrusion plate to slide and squeeze the moisture out of the adsorption filter element, facilitating the adsorption filter element's absorption of more moisture.

[0026] This invention, through its pneumatic chamber, drive cylinder, transmission rod, and transmission gears, enables the drive cylinder to be activated when the inner insulated chamber needs insulation treatment. The drive cylinder moves the transmission rod, which in turn moves the toothed plate and sealing plate. The toothed plate then rotates the transmission gears, which in turn rotate the fixed frame. This makes the fan perpendicular to the exhaust trough, and by causing the sealing plate to cover the air inlet trough, the fan is activated. The fan drives airflow to enter from one end of the exhaust trough and exit from the other end, thus circulating the airflow within the inner insulated chamber. This ensures uniform heating of multiple drying trays and improves the heating effect.

[0027] The present invention also improves installation efficiency by using multiple sets of support rods and a sliding plate, which allows the drying tray to be placed on top of the sliding plate when it is necessary to install the drying tray. The hook is inserted into the latch, and the sliding plate is moved by pulling the latch. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the front cross-section of the drying outer box of the present invention;

[0030] Figure 3 This is a schematic diagram of the cross-section of the drying outer box of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the thermal insulation inner box of the present invention;

[0032] Figure 5 This is a schematic diagram of the motor drive structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the adsorption filter element and cleaning mechanism of the present invention;

[0034] Figure 7 This is a schematic diagram of the slide bar of the present invention;

[0035] Figure 8 This is a schematic diagram of the pneumatic chamber of the present invention;

[0036] Figure 9 This is a schematic diagram of the pneumatic chamber of the present invention during the circulation process;

[0037] Figure 10 This is a schematic diagram of the tray mounting structure of the present invention;

[0038] Figure 11 This is a schematic diagram of the pallet limiting mechanism of the present invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Drying outer chamber; 101. Base; 102. Door; 103. Controller; 2. Insulated inner chamber; 201. Pneumatic chamber; 202. Fixing frame; 2021. Fan; 203. Air inlet; 204. Exhaust duct; 205. Heating element; 206. Electronic controller; 3. Drying tray; 4. Motor; 401. Output rod; 402. Limiting ring; 403. Support rod; 4031. Limiting baffle; 404. First sliding plate; 4041. 4042, Hook; 405, Rear Hook Plate; 406, Outer Hook Plate; 407, Cam Rod; 5, Lower Sealing Plate; 501, Lower Angle Baffle; 502, Pulley; 6, Adsorption Filter Element; 7, Squeezing Plate; 8, Upper Sealing Plate; 801, Upper Angle Baffle; 9, Slide Rod; 901, Clamping Rod; 902, Second Slide Plate; 10, Drive Cylinder; 11, Transmission Rod; 1101, Tooth Plate; 1102, Sealing Plate; 12, Transmission Gear. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] The embodiments of the present invention will now be described.

[0043] Please see Figure 1 An electric heating dryer capable of uniform heating includes an outer drying chamber 1, a base 101 connected to the bottom of the outer drying chamber 1, a cover 102 installed on the outside of the outer drying chamber 1, a controller 103 connected to the side of the outer drying chamber 1, and an insulated inner chamber 2 installed inside the outer drying chamber 1.

[0044] Please see Figure 1 , Figure 10 and Figure 11A motor 4 is connected to the top of the drying outer chamber 1. An output rod 401 is connected to the output end of the motor 4. Multiple sets of limiting rings 402 are connected to the outer side of the output rod 401. A support rod 403 is fixedly connected to the outer side of each set of limiting rings 402. A first sliding plate 404 is slidably connected to the top of the support rod 403. A rear locking plate 405 and an outer locking plate 406 are connected to the top of the first sliding plate 404. The drying tray 3 is fixed between the rear locking plate 405 and the outer locking plate 406. A limiting baffle 4031 is connected to the middle of the outer wall of the support rod 403. The first sliding plate 404 is symmetrically arranged in two parts. The inner end of the first slide plate 404 is connected to a locking piece 4042, and the end of the first slide plate 404 is also connected to a hook 4041. When installing the drying tray 3, the first slide plate 404 is pulled and moved on the support rod 403 by the pull rod to lock the hook 4041 at the end of the first slide plate 404. The locking piece 4042 is then engaged with the limiting plate 4031. The drying tray 3 with parts is then placed on the pulled-out first slide plate 404. The rear locking plate 405 and the outer locking plate 406 limit the drying tray 3 and push the first slide plate 404 back to its original position. After that, multiple sets of drying trays 3 are installed.

[0045] Please see Figure 3 , Figure 4 , Figure 7 and Figure 8 A pneumatic chamber 201 is installed on the back of the insulated inner box 2. A fixed frame 202 is rotatably connected inside the pneumatic chamber 201. Multiple fans 2021 are installed on the inner wall of the fixed frame 202. Air inlet slots 203 are opened on both sides of the pneumatic chamber 201. The air inlet slots 203 are aligned with the electronic controller 206. An exhaust slot 204 is opened on the inner side of the pneumatic chamber 201 and is connected to the inside of the insulated inner box 2. A drive cylinder 10 is connected to the top of the pneumatic chamber 201. A transmission rod 11 is connected to the output end of the drive cylinder 10. A groove is opened in the middle of the transmission rod 11, and teeth are installed on the side of the groove. Plate 1101 has a transmission gear 12 installed inside the groove. The transmission gear 12 is connected to the fixed frame 202. Both sides of the transmission rod 11 are equipped with sealing plates 1102, and the sealing plates 1102 are attached to the outside of the air inlet groove 203 when moving. The back of the heat-insulating inner box 2 is equipped with heating tubes 205 on both sides of the pneumatic chamber 201. When drying, multiple sets of heating tubes 205 are first started to heat the air entering the box. At this time, the fan 2021 is started to draw the heated air into the pneumatic chamber 201 through the air inlet groove 203 and blow it evenly to the position of each set of drying trays 3 through the exhaust groove 204, thereby continuously heating the drying trays 3.

[0046] Please see Figure 3 , Figure 4 , Figure 7 and Figure 8 The inner walls of the drying outer box 1 and the heat-insulating inner box 2 are equipped with a lower sealing plate 5 and an upper sealing plate 8. Adsorption filter elements 6 are connected to the corners of the lower sealing plate 5 and the upper sealing plate 8. The bottom end of the motor 4 extends to the bottom of the heat-insulating inner box 2 and is connected to a cam rod 407. A slide rod 9 is sleeved at the bottom end of the cam rod 407. A second slide plate 902 is set in the middle of the slide rod 9. The second slide plate 902 is perpendicular to the slide rod 9 and has a guide groove on its inner wall. The second slide plate 902 is connected to the cam rod 407 through the guide groove. Both sides of the slide rod 9 extend to the outside of the lower sealing plate 5. Both ends of the slide rod 9 are connected to clamping rods 901. Two sets of extrusion plates 7 are symmetrically fixed to the inner wall of the clamping rods 901. The two sets of extrusion plates 7 are clamped on the outside of the adsorption filter element 6. While filtering, the cam rod 407 connected to the bottom of the motor 4 also rotates synchronously. The cam rod 407 consists of a cam and a rod, with the rod located below the cam and inside the second slide plate 902. Therefore, when the cam rod 407 rotates, it will synchronously drive the second slide plate 902 to move left and right, converting the rotation of the cam rod 407 into the left and right movement of the slide rod 9. This causes the extrusion plate 7 to move left and right on the outside of the adsorption filter element 6, so that the extrusion plate 7 squeezes the surface of the adsorption filter element 6, squeezing out the water absorbed by the adsorption filter element 6. The water flows down along the extrusion plate 7 to the drain pipe at the bottom of the drying outer box 1 to discharge the water, further improving the drying effect.

[0047] For details regarding the above embodiments, please refer to [link / reference]. Figures 1 to 3 The top, bottom, sides and back of the insulated inner box 2 are all spaced from the drying outer box 1. The connection between the insulated inner box 2 and the drying outer box 1 is aligned with the cover 102. The cover 102 is hollow and insulated, which can effectively improve the insulation effect of the insulated inner box 2.

[0048] For details regarding the above embodiments, please refer to [link / reference]. Figure 2 and Figure 3 Both ends of the lower sealing plate 5 are provided with lower angle baffles 501, and both ends of the upper sealing plate 8 are provided with upper angle baffles 801. The lower angle baffles 501 and the upper angle baffles 801 are both attached to the outer wall of the heat-insulating inner box 2. The inner wall of the lower angle baffle 501 is provided with a pulley 502. The sliding rod 9 slides above the pulley 502. The inner side of the pulley 502 is provided with a through hole, which can conveniently seal and block the space between the drying outer box 1 and the heat-insulating inner box 2, and the pulley facilitates the movement of the sliding rod 9.

[0049] Before use, each set of equipment needs to be installed. Open the drying outer box 1, then install the adsorption filter element 6 on the side of the lower angle baffle 501 and the upper angle baffle 801, and fix the adsorption filter element. The adsorption filter element 6 is located between the two sets of extrusion plates 7. The extrusion plates 7 can slide on the outside of the adsorption filter element 6 and scrape and extrude the surface of the adsorption filter element 6. Then, install multiple sets of heating tubes 205 above the electronic controller 206 to complete the assembly of the heating tubes 205. Then, install each set of fans 2021 on the fixing frame 202 and control the fans through wires. Check whether the drive cylinder 10 can drive the transmission rod 11 to move. After the test is completed, close the drying outer box 1 and place the parts to be dried into the multiple sets of drying trays 3. At this point, the cover door 102 is opened, and the lever is engaged with the hook 4041 at the end of the first slide plate 404. The first slide plate 404 is then pulled along the support rod 403 until the engaging piece 4042 and the limiting stop piece 4031 are engaged. The drying tray 3 with the parts is then placed on the pulled-out first slide plate 404. The rear engaging plate 405 and the outer engaging plate 406 limit the drying tray 3, and the first slide plate 404 is pushed back to its original position. After installing multiple sets of drying trays 3, the parts are installed. During drying, multiple heating elements 205 are activated first, heating the incoming air. At this time, the fan 2021 is activated, drawing the heated air into the air duct 203 and into the pneumatic chamber 201. The exhaust vents 204 evenly blow heat onto each set of drying trays 3, continuously heating them. Simultaneously, the motor 4 is activated, its output driving the output rod 401 to rotate. The output rod 401, in turn, drives the limiting ring 402 and support rod 403 to rotate, causing multiple sets of first sliding plates 404 and drying trays 3 to rotate. This allows multiple sets of parts to pass sequentially through the exhaust vents 204, continuously heating the parts within the drying trays 3. The resulting hot airflow is discharged into the outer drying chamber 1 through exhaust vents on the inner wall of the insulated inner chamber 2, achieving airflow circulation. The airflow discharged into the outer drying chamber 1 typically contains polluting gases and a large amount of water vapor. During its flow, the airflow is affected by the lower sealing plate 5. With the upper sealing plate 8 blocking the flow, the airflow only passes through the adsorption filter element 6 and flows to the outside of the heating tube 205 for circulation heating. The adsorption filter element 6 absorbs some water vapor and harmful gases, thereby effectively reducing the water vapor content during the airflow circulation process and further improving the drying speed of the parts. While filtering, the cam rod 407 connected to the bottom of the motor 4 also rotates synchronously. The cam rod 407 consists of a cam and a push rod, with the push rod located below the cam position and inside the second slide plate 902. Therefore, when the cam rod 407 rotates, it will synchronously drive the second slide plate 902 to move left and right, converting the rotation of the cam rod 407 into the left and right movement of the slide rod 9, thereby driving the extrusion plate 7 to move left and right outside the adsorption filter element 6.The squeezing plate 7 presses against the surface of the adsorption filter element 6, squeezing out the water absorbed by the filter element 6. The water flows downwards along the squeezing plate 7 to the drain pipe at the bottom of the drying outer chamber 1, where it is discharged, further improving the drying effect.

[0050] After the temperature inside the inner heat-insulating chamber 2 reaches a suitable temperature, it is necessary to maintain the temperature inside the inner heat-insulating chamber 2. At this time, the drive cylinder 10 is activated. The output end of the drive cylinder 10 drives the transmission rod 11 to move towards the position of the exhaust groove 204. The transmission rod 11 pulls the toothed plate 1101 and the sealing plate 1102 to move synchronously. The toothed plate 1101 drives the transmission gear 12 to rotate. The transmission gear 12 drives the fixed frame 202 to rotate. The fixed frame 202 drives multiple sets of fans 2021 to be set perpendicular to the exhaust groove 204. The air inlet groove 203 is sealed by the sealing plate 1102. Then, the fans 2021 continue to start. The fans 2021 drive the airflow to enter from one side of the exhaust groove 204 (and the direction of entry is opposite to the rotation direction of each set of drying trays 3), and the airflow is discharged from the other end of the exhaust groove 204. This drives the airflow to circulate inside the inner heat-insulating chamber 2, heat-insulating and drying the parts, and reducing the deformation of the parts.

[0051] After the heat preservation and drying are completed, it is necessary to cool down the temperature inside the heat preservation inner box 2. At this time, the drive cylinder 10 is started to push the transmission rod 11 back to its original position. At this time, the fixed frame 202 returns to its original position, and the sealing plate 1102 is also separated from the air inlet groove 203. The ventilation chamber on the outer wall of the equipment is opened to connect the drying outer box 1 to the outside. The fan 2021 is started in reverse to draw the gas in the heat preservation inner box 2 into the pneumatic chamber 201 and discharge it through the air inlet groove 203. By drawing the gas located in the drying outer box 1 into the heat preservation inner box 2, the heat preservation inner box 2 can be cooled down quickly.

[0052] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An electric heating dryer capable of uniform heating, comprising a drying outer chamber (1), characterized in that: The drying outer box (1) is equipped with an insulated inner box (2). The top of the drying outer box (1) is connected to a motor (4). The output end of the motor (4) is connected to an output rod (401). The output rod (401) extends into the interior of the insulated inner box (2) and is connected to multiple sets of limiting mechanisms. Each set of limiting mechanisms is equipped with a drying tray (3). The back of the insulated inner box (2) is equipped with a pneumatic chamber (201). The interior of the pneumatic chamber (201) is rotatably connected to a fixed frame (202). Multiple sets of fans (2021) are installed on the inner wall of the fixed frame (202). Air inlet slots (203) are opened on both sides of the pneumatic chamber (201). The insulated inner box ( 2) The back of the pneumatic chamber (201) is equipped with heating tubes (205) on both sides. The inner walls of the drying outer box (1) and the heat preservation inner box (2) are equipped with a lower sealing plate (5) and an upper sealing plate (8). The corners of the lower sealing plate (5) and the upper sealing plate (8) are connected to an adsorption filter element (6). The bottom end of the motor (4) extends to the bottom of the heat preservation inner box (2) and is connected to a cam rod (407). The bottom end of the cam rod (407) is sleeved with a slide rod (9). Both sides of the slide rod (9) extend to the outside of the lower sealing plate (5), and each end of the slide rod (9) is equipped with two sets of extrusion plates (7). The two sets of extrusion plates (7) are clamped on the outside of the adsorption filter element (6). The pneumatic chamber (201) has air inlet slots (203) on both sides, the air inlet slots (203) are aligned with the electronic controller (206), and the pneumatic chamber (201) has an exhaust slot (204) on the inner side, and the exhaust slot (204) is connected to the interior of the insulated inner box (2). The top of the pneumatic chamber (201) is connected to a drive cylinder (10), the output end of the drive cylinder (10) is connected to a transmission rod (11), and a groove is provided in the middle of the transmission rod (11), and a toothed plate (1101) is installed on the side of the groove. A transmission tooth (12) is installed on the inner side of the groove. The transmission tooth (12) is connected to the fixed frame (202). A sealing plate (1102) is installed on both sides of the transmission rod (11), and the sealing plate (1102) fits against the outside of the air inlet groove (203) when it moves. The transmission tooth (12) drives the fixed frame (202) to rotate. The fixed frame (202) drives multiple sets of fans (2021) to be set perpendicular to the exhaust groove (204), and the air inlet groove (203) is sealed by the sealing plate (1102).

2. The electric heating dryer capable of uniform heating according to claim 1, characterized in that: The bottom of the drying outer box (1) is connected to a base (101), and a cover door (102) is installed on the outside of the drying outer box (1). The cover door (102) is used to seal the heat-insulating inner box (2). A controller (103) is connected to the side of the drying outer box (1).

3. The electric heating dryer capable of uniform heating according to claim 2, characterized in that: The top, bottom, sides and back of the insulated inner box (2) are all spaced from the drying outer box (1). The connection between the insulated inner box (2) and the drying outer box (1) is aligned with the cover door (102), and the cover door (102) is hollow and insulated inside.

4. The electric heating dryer capable of uniform heating according to claim 1, characterized in that: Both ends of the slide rod (9) are connected to clamp rods (901), and two sets of extrusion plates (7) are symmetrically fixed on the inner wall of the clamp rods (901). A second slide plate (902) is provided in the middle position of the slide rod (9). The second slide plate (902) is perpendicular to the slide rod (9), and a guide groove is provided on the inner wall of the second slide plate (902). The second slide plate (902) is connected to the cam rod (407) through the guide groove.

5. The electric heating dryer capable of uniform heating according to claim 1, characterized in that: Both ends of the lower sealing plate (5) are provided with lower angle baffles (501), and both ends of the upper sealing plate (8) are provided with upper angle baffles (801). The lower angle baffles (501) and the upper angle baffles (801) are both attached to the outer wall of the heat-insulating inner box (2). The inner wall of the lower angle baffle (501) is provided with a pulley (502). The slide rod (9) slides above the pulley (502), and the inner side of the pulley (502) is provided with a through hole.

6. The electric heating dryer capable of uniform heating according to claim 1, characterized in that: The output rod (401) is connected to a number of limiting rings (402) on the outside. Each limiting ring (402) is fixedly connected to a support rod (403) on the outside. The top of the support rod (403) is slidably connected to a first sliding plate (404). The top of the first sliding plate (404) is connected to a rear locking plate (405) and an outer locking plate (406). The drying tray (3) is fixed between the rear locking plate (405) and the outer locking plate (406).

7. An electric heating dryer capable of uniform heating according to claim 6, characterized in that: The support rod (403) has a limit stop plate (4031) connected to the middle position of the outer wall. The first slide plate (404) is arranged in two symmetrical parts, and the inner end of the first slide plate (404) is connected to a locking piece (4042). The end of the first slide plate (404) is also connected to a hook (4041).

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