An inorganic pretreatment electric heating drying oven

Abstract

An inorganic pretreatment electric heating forced-air drying oven, relating to the field of environmental testing and drying, includes a box body. A hot air device is installed on the top of the box body. A hinged, openable door is connected to one side of the box body. Adjustable height support structures are installed on both sides of the inner wall of the box body, on which a tray is placed. This drying oven constructs a scientific hot air transmission path by creating a cavity in the inner wall of the back of the box body and equidistantly arranged multiple sets of strip-shaped openings on the inner wall of the cavity. The hot air generated by the hot air device first enters the cavity for buffering and even distribution, and then fully covers the internal space of the box body through the equidistantly distributed strip-shaped openings. This effectively avoids the airflow dead zones caused by the single air outlet of traditional equipment, significantly reducing temperature differences between different areas within the box body.

Description

Technical Field

[0001] This utility model relates to the field of drying ovens, specifically an inorganic pretreatment electric heating forced-air drying oven. Background Technology

[0002] In industrial production and laboratory research, inorganic pretreatment is a crucial step in many fields (such as materials science, environmental monitoring, chemical production, and food testing). Its core purpose is to remove moisture, volatile impurities, or perform pretreatment before specific chemical reactions in inorganic samples. Drying is a key step in the inorganic pretreatment process to ensure the accuracy of subsequent experiments or production. As various industries increasingly demand higher efficiency, accuracy, and stability in sample processing, traditional drying equipment has gradually revealed numerous problems in meeting practical needs, specifically in the following aspects:

[0003] 1. Traditional drying equipment suffers from uneven hot air distribution, making it difficult to guarantee drying quality.

[0004] Traditional inorganic pretreatment drying equipment often employs a single air outlet or a simple duct design, which can easily create localized dead zones within the chamber, leading to significant temperature differences between different areas. For example, some equipment only has a single hot air outlet at the top or side of the chamber, causing the hot air to directly impact a localized area. This results in samples near the outlet being over-dried and clumping, while samples further away from the outlet suffer from insufficient heating, leaving residual moisture and failing to achieve uniform drying. This uneven temperature distribution directly affects the accuracy of subsequent inorganic sample testing (such as component analysis and purity determination) or the quality of production and processing (such as inorganic material molding and powder preparation). The shortcomings of traditional equipment are particularly pronounced for trace inorganic samples or precision experiments that require extremely high uniformity of drying.

[0005] II. Insufficient flexibility and poor adaptability of the load-bearing structure.

[0006] In inorganic pretreatment, the morphology (e.g., powder, granules, lumps), volume, and quantity of samples to be dried vary considerably. It is necessary to adjust the height and spacing of the supporting components according to actual needs to fully utilize the chamber space and ensure uniform heating of the samples. However, traditional drying equipment often features a fixed supporting structure, allowing trays to be placed at only a few preset heights, making it impossible to flexibly adjust the spacing according to sample size. For example, when processing tall lumps, a fixed spacing may prevent the sample from being placed or cause the top to adhere to the inner wall of the chamber, affecting hot air circulation. When processing a large number of small powder samples, the limited number of tray layers reduces processing efficiency, requiring batch drying, increasing time costs and operational complexity. Therefore, we propose an inorganic pretreatment electric heating forced-air drying oven. Utility Model Content

[0007] To address the shortcomings of existing technologies, this invention provides an inorganic pretreatment electric heating forced-air drying oven, which solves the aforementioned problems.

[0008] To achieve the above-mentioned objectives, this utility model provides the following technical solution: an inorganic pretreatment electric heating drying oven, comprising a box body, a hot air device provided on the top of the box body, a door hinged to one side of the box body that can be opened and closed, and a load-bearing structure that can be adjusted up and down on both sides of the inner wall of the box body, on which a tray is placed.

[0009] Preferably, a cavity is formed in the inner wall of the back of the housing, the cavity is connected to the air outlet of the hot air device, and multiple sets of strip-shaped openings are equally spaced on the inner wall of the cavity, the strip-shaped openings are connected to the interior of the housing.

[0010] Preferably, the tray has multiple sets of waist holes at equal intervals, which can increase the air permeability of the tray.

[0011] Preferably, rectangular grooves are provided on both sides of the inner wall of the box, and multiple sets of circular insertion holes are provided at equal intervals on both sides of the inner wall of the rectangular groove. The bearing structure is engaged with the corresponding circular insertion holes.

[0012] Preferably, one end of the load-bearing structure extends into the interior of the rectangular groove in the inner wall, and the end of the load-bearing structure extending into the interior of the rectangular groove in the inner wall is provided with two sets of spring structures, which are inserted into the corresponding circular holes on both sides.

[0013] Preferably, the load-bearing structure includes a rectangular fixing block and a strip rod. The rectangular fixing block is slidably engaged inside the rectangular groove on the inner wall, and the strip rod is fixedly installed at one end of the rectangular fixing block extending to the outside of the rectangular groove on the inner wall. The strip rod is attached to the inner wall of the box, and the spring structure is set inside the rectangular fixing block.

[0014] Preferably, the rectangular fixing block has circular grooves on both sides, and the spring structure includes a spring and a pin. The spring is fixedly installed inside the circular groove, and a pin is fixedly installed at one end of the spring.

[0015] Preferably, a rectangular groove is provided on the top of the rectangular fixing block, and a slider is fixedly installed on the pin, the slider extending to the outside of the rectangular fixing block through the rectangular groove.

[0016] Compared with the prior art, this utility model provides an inorganic pretreatment electric heating forced-air drying oven, which has the following beneficial effects:

[0017] I. Improve hot air utilization efficiency to ensure uniform and stable drying quality.

[0018] This drying oven utilizes a cavity created on the inner wall of its rear panel, with multiple evenly spaced strip-shaped openings on the inner wall of the cavity to construct a scientific hot air transmission path. The hot air generated by the hot air device first enters the cavity for buffering and even distribution, then fully covers the interior space of the oven through the evenly distributed strip-shaped openings. This effectively avoids the airflow dead zones caused by single-outlet air delivery in traditional equipment, significantly reducing temperature differences between different areas within the oven. Samples, whether near the edge or in the center of the oven, receive uniform hot air contact, preventing over-drying and clumping of samples near the air vents, and avoiding moisture residue in samples further away from the air vents. This design is particularly crucial for scenarios such as trace inorganic sample detection, precision experimental sample pretreatment, and inorganic material molding in industrial production. It significantly improves the consistency of sample drying, directly ensuring the accuracy of subsequent testing and the quality of production processing, and reducing sample scrapping or secondary processing costs caused by uneven drying.

[0019] II. Enhance the adaptability of load-bearing structures to flexibly meet diverse needs.

[0020] Addressing the issues of fixed load-bearing structures and poor adaptability in traditional equipment, this drying oven features a flexibly adjustable load-bearing structure. By creating multiple sets of equidistant circular insertion holes on both sides of a rectangular groove on the inner wall of the chamber, and utilizing the spring and pin structure within the rectangular fixing block, operators can freely adjust the height of the strip rods according to the shape, volume, and quantity of the samples to be dried, thereby changing the spacing and number of trays. When processing taller blocky samples, the tray spacing can be increased to prevent the samples from adhering to the inner wall of the chamber and affecting hot air circulation; when processing large quantities of small powder samples, the spacing can be reduced and the number of trays increased, enabling single-batch processing of large quantities without the need for batch drying, significantly improving processing efficiency. This flexible adaptability allows the equipment to meet diverse inorganic pretreatment needs in various fields such as materials science, environmental monitoring, and chemical production, reducing the cost of replacing equipment or adjusting production processes due to changes in sample specifications.

[0021] Third, balance ease of operation with structural stability to reduce usage risks.

[0022] The height adjustment mechanism of this drying oven's support structure employs a slider and spring-loaded pin design. Operators do not need wrenches, screwdrivers, or other tools; they simply slide two sets of sliders towards the center to retract the pins into their circular grooves, releasing the support structure from the rectangular groove on the inner wall. After moving the bar up or down to the target height, the sliders are released, and the spring rebounds, pushing the pins into the corresponding circular holes to complete the fixation. The entire adjustment process requires only manual operation, is quick and simple, and solves the problem of cumbersome adjustments in traditional equipment. Simultaneously, the spring-driven pins tightly engage with the circular holes, and the sliding engagement structure between the rectangular fixing block and the rectangular groove on the inner wall effectively limits the displacement of the support structure during equipment operation. Even with slight vibrations, it prevents tray displacement or sample spillage, reducing operator workload and eliminating sample loss and safety hazards. This meets the dual requirements of convenience and stability for industrial production and laboratory settings.

[0023] IV. Optimize the balance between energy consumption and efficiency, in line with the trend of green production.

[0024] In the hot air transfer and utilization stage, the design of the cavity and the strip-shaped inlet not only improves the uniformity of hot air but also reduces heat waste. Hot air is directionally transferred from the cavity to the strip-shaped inlet, avoiding heat leakage problems caused by unreasonable air duct design in traditional equipment. This allows the hot air to be applied more concentratedly to the sample to be dried, significantly improving heat utilization. Furthermore, there is no need to compensate for uneven heating by increasing the hot air temperature or extending the drying time, thus reducing equipment energy consumption and shortening the overall inorganic pretreatment cycle. Simultaneously, the uniform hot air environment reduces the probability of secondary drying of samples, further improving processing efficiency. This aligns perfectly with the current industrial trend of green production and energy conservation, and long-term use can help enterprises or laboratories reduce energy costs, achieving a win-win situation for both economic and environmental benefits. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0027] Figure 3 This is a front view schematic diagram of the present utility model;

[0028] Figure 4 for Figure 3 BB cross-sectional diagram in the middle;

[0029] Figure 5 for Figure 4 A magnified view of part C in the diagram.

[0030] In the diagram: 1. Box body; 2. Door body; 3. Tray; 4. Rectangular groove on the inner wall; 5. Circular insertion holes on both sides; 6. Rectangular groove; 7. Slider; 8. Rectangular fixing block; 9. Strip rod; 10. Cavity; 11. Strip opening; 12. Hot air equipment; 13. Circular groove; 14. Spring; 15. Pin. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-5 An inorganic pretreatment electric heating forced-air drying oven, with the following structure:

[0033] I. Main Structure

[0034] Box 1

[0035] The housing 1 is the core supporting frame of the entire inorganic pretreatment electric heating forced-air drying oven, providing the basic space for the installation and operation of all other structures. A hot air device 12 is specially installed on its top to generate the hot air required for drying; a hinged door 2 on one side allows operators to easily place and remove items to be dried; a cavity 10 is formed in the inner wall of the back, which is connected to the air outlet of the hot air device 12 and serves as an important channel for hot air transmission; rectangular grooves 4 are formed on both inner walls, and multiple sets of circular insertion holes 5 are equidistantly formed on the inner walls of both sides of the rectangular grooves 4, providing conditions for the installation and height adjustment of the supporting structure; the interior is used to accommodate the trays 3 and the items to be dried, and is the main area for the drying operation.

[0036] Door 2

[0037] Door 2 is hinged to one side of chamber 1, allowing for opening and closing. During drying operations, closing door 2 creates a relatively sealed space inside chamber 1, effectively preventing hot air leakage and ensuring the stability of the internal temperature, thus guaranteeing the drying effect. When it is necessary to place or remove items to be dried, simply opening door 2 allows for convenient operation and facilitates the smooth progress of drying operations.

[0038] II. Load-bearing and placement structure

[0039] Tray 3

[0040] The tray 3 is placed on the strip bar 9 of the supporting structure and is mainly used to support the items to be dried. Multiple sets of perforations are evenly spaced on the tray 3, which significantly increase its air permeability. During the drying process, hot air can more fully contact the items on the tray 3 through the perforations, resulting in more even heating and thus improving drying efficiency and quality, ensuring that the items reach the ideal drying state.

[0041] Load-bearing structure

[0042] The load-bearing structure is the key structure used to support the tray 3, including rectangular fixing blocks 8 and strip rods 9. Its main function is to flexibly adjust the vertical height of the tray 3 according to the height and quantity of the items to be dried, so as to meet different drying needs.

[0043] Rectangular fixing block 8: The rectangular fixing block 8 is slidably engaged inside the rectangular groove 4 on the inner wall and is an important component connecting the load-bearing structure and the housing 1. A strip rod 9 is fixedly installed at one end extending to the outside of the rectangular groove 4, providing stable support for the strip rod 9. Circular grooves 13 are provided on both sides of the rectangular fixing block 8 for installing spring structures; a rectangular groove 6 is provided at the top, through which a slider 7 extends to the outside of the rectangular fixing block 8, allowing operators to easily adjust the height of the load-bearing structure by sliding the slider 7.

[0044] Strip rod 9: Strip rod 9 is fixedly installed at one end of the rectangular fixing block 8 extending to the outer side of the rectangular groove 4 on the inner wall, and fits against the inner wall of the box 1. Its main function is to place the tray 3, and through cooperation with the rectangular fixing block 8, the vertical height of the tray 3 can be adjusted to accommodate items of different sizes and quantities to be dried.

[0045] III. Hot Air Transmission Structure

[0046] Cavity 10

[0047] The cavity 10 is located in the inner wall of the back of the housing 1 and is connected to the air outlet of the hot air device 12. It is a transition channel for hot air to be transmitted from the hot air device 12 to the inside of the housing 1, and can temporarily store and buffer the hot air blown out by the hot air device 12 to ensure that the hot air can be more evenly distributed to the subsequent transmission channels.

[0048] Strip-shaped opening 11

[0049] The slots 11 are equidistantly spaced on the inner wall of the cavity 10 and connect to the interior of the chamber 1. When hot air blown out by the hot air device 12 enters the cavity 10, it will evenly enter the interior of the chamber 1 through the slots 11, making full contact with the items to be dried placed on the tray 3, thus achieving the drying operation. The equidistant arrangement of the slots 11 ensures that the hot air is evenly distributed inside the chamber 1, avoiding localized excessively high or low temperatures and improving the drying quality.

[0050] Hot air equipment 12

[0051] The hot air device 12 is located at the top of the chamber 1 and is the core component of the drying chamber that generates hot air. When the drying operation is started, the hot air device 12 generates high-temperature hot air and delivers the hot air into the cavity 10 through its air outlet. Then, the hot air enters the chamber 1 through the strip-shaped opening 11, providing the heat required for drying the items. It is a key device for realizing the drying function.

[0052] IV. Height Adjustment Auxiliary Structure

[0053] Inner wall rectangular groove 4

[0054] The inner wall rectangular groove 4 is formed on both sides of the inner wall of the box 1, and multiple sets of circular insertion holes 5 are equally spaced on both sides of the inner wall. It provides a sliding track for the rectangular fixing block 8, so that the rectangular fixing block 8 can slide up and down along the inner wall rectangular groove 4, thereby driving the strip rod 9 and the tray 3 to achieve height adjustment. At the same time, it also guides and limits the sliding of the rectangular fixing block 8, ensuring the stable operation of the load-bearing structure.

[0055] 5 round sockets on both sides

[0056] Two circular insertion holes 5 are equidistantly located on the inner walls of the rectangular groove 4, cooperating with the spring structure on the rectangular fixing block 8 in the load-bearing structure. When the height of the load-bearing structure needs to be fixed, the pin 15 in the spring structure is inserted into the corresponding circular insertion holes 5 on both sides, thereby fixing the rectangular fixing block 8 in the corresponding position of the rectangular groove 4 on the inner wall, thus fixing the height of the load-bearing structure. When the height needs to be adjusted, the pin 15 is disengaged from the circular insertion holes 5 by sliding the slider 7, allowing the height to be adjusted. The equidistant arrangement of the circular insertion holes 5 on both sides provides multiple different height fixing positions for the load-bearing structure, meeting different drying needs.

[0057] Rectangular groove 6

[0058] A rectangular groove 6 is formed on the top of the rectangular fixing block 8, and the slider 7 extends to the outside of the rectangular fixing block 8 through the rectangular groove 6. It provides a channel for the movement of the slider 7, allowing the operator to control the extension and retraction of the pin 15 by sliding the slider 7 on the outside of the rectangular fixing block 8, thereby adjusting the height of the load-bearing structure. It is an important connection channel between the operator and the load-bearing structure height adjustment mechanism.

[0059] Slider 7

[0060] The slider 7 is fixedly mounted on the pin 15 and extends to the outside of the rectangular fixing block 8 through the rectangular groove 6 at the top of the rectangular fixing block 8. By sliding the two sliders 7 towards the center point, the operator can move the pin 15 towards the inside of the circular groove 13, causing the pin 15 to retract into the circular groove 13, thereby releasing the fixing of the bearing structure to the two circular insertion holes 5 on both sides, facilitating height adjustment. After the height adjustment is complete, releasing the slider 7 causes it to return to its initial position under the rebound of the spring 14, as the pin 15 pops out, thus re-fixing the bearing structure. The slider 7 makes the height adjustment operation of the bearing structure more convenient and effortless.

[0061] Circular groove 13

[0062] Circular grooves 13 are formed on both sides of the rectangular fixing block 8, mainly used for installing springs 14 and pins 15 in the spring structure. They provide installation space and a moving track for springs 14 and pins 15, allowing springs 14 to compress and rebound within the circular grooves 13, and pins 15 to extend and retract within the circular grooves 13, ensuring the normal operation of the spring structure and providing a guarantee for adjusting and fixing the height of the load-bearing structure.

[0063] Spring 14

[0064] Spring 14 is fixedly installed inside the circular groove 13, with one end fixedly connected to the bottom of the circular groove 13 and the other end fixedly connected to the pin 15. During the height adjustment of the load-bearing structure, when the operator slides slider 7 to make pin 15 slide inward into the circular groove 13, spring 14 is compressed and stores elastic potential energy. When the height adjustment is completed, the operator releases slider 7, and spring 14 releases elastic potential energy and generates a rebound force, pushing pin 15 to slide outward into the circular groove 13, so that pin 15 is inserted into the circular insertion holes 5 on both sides at the corresponding height, thus fixing the height of the load-bearing structure. Spring 14 is the power source for the height adjustment and fixing of the load-bearing structure, ensuring the reliable operation of the height adjustment mechanism.

[0065] Pin 15

[0066] The pin 15 is fixedly installed at one end of the spring 14 and is fixedly connected to the slider 7. Under the action of the spring 14, the pin 15 can extend and retract within the circular groove 13. When it is necessary to adjust the height of the bearing structure, the pin 15 retracts into the circular groove 13 under the action of the slider 7, disengaging from the circular holes 5 on both sides; when the height is adjusted to the correct position, the pin 15 pops out under the rebound action of the spring 14 and inserts into the circular holes 5 on both sides at the corresponding height, fixing the bearing structure at that height position. The pin 15 is the connecting component between the bearing structure and the circular holes 5 on both sides, directly determining the reliability and stability of the fixed height of the bearing structure.

[0067] The structure is connected as follows: it includes a box body 1, a hot air device 12 is installed on the top of the box body 1, a door 2 that can be opened and closed is hinged to one side of the box body 1, and a load-bearing structure that can be adjusted up and down is installed on both sides of the inner wall of the box body 1, and a tray 3 is placed on the load-bearing structure.

[0068] Furthermore, a cavity 10 is provided in the inner wall of the back of the box 1. The cavity 10 is connected to the air outlet of the hot air device 12. Multiple sets of strip-shaped openings 11 are equally spaced on the inner wall of the cavity 10. The strip-shaped openings 11 are connected to the interior of the box 1. When drying, the hot air from the hot air device 12 is blown out and enters the interior of the cavity 10, and then enters the interior of the box 1 through the strip-shaped openings 11 to dry the items placed on the tray 3.

[0069] Furthermore, multiple sets of waist holes are equally spaced on the tray 3, which can increase the air permeability of the tray 3.

[0070] Furthermore, rectangular grooves 4 are provided on both sides of the inner wall of the box 1, and multiple sets of circular insertion holes 5 are provided at equal intervals on both sides of the inner wall of the rectangular groove 4. The bearing structure is engaged with the corresponding circular insertion holes 5.

[0071] Furthermore, one end of the load-bearing structure extends into the interior of the rectangular groove 4 on the inner wall. Two sets of spring structures are provided at the end of the load-bearing structure that extends into the interior of the rectangular groove 4 on the inner wall. The spring structures are inserted into the corresponding circular insertion holes 5 on both sides.

[0072] Furthermore, the load-bearing structure includes a rectangular fixing block 8 and a strip rod 9. The rectangular fixing block 8 is slidably engaged inside the rectangular groove 4 on the inner wall, and the strip rod 9 is fixedly installed at one end of the rectangular fixing block 8 extending to the outside of the rectangular groove 4 on the inner wall. The strip rod 9 is attached to the inner wall of the box body 1, and the spring structure is set inside the rectangular fixing block 8.

[0073] Furthermore, both sides of the rectangular fixing block 8 are provided with circular grooves 13. The spring structure includes a spring 14 and a pin 15. The spring 14 is fixedly installed inside the circular groove 13, and a pin 15 is fixedly installed at one end of the spring 14.

[0074] Furthermore, a rectangular groove 6 is provided on the top of the rectangular fixing block 8, and a slider 7 is fixedly installed on the pin 15. The slider 7 extends to the outside of the rectangular fixing block 8 through the rectangular groove 6. When it is necessary to adjust the vertical height of the bearing structure to change the vertical height of the tray 3, the slider 7 slides towards the side closer to the center point of the two sliders. Then the spring 14 is compressed, and the pin 15 slides towards the inside of the circular groove 13. At this time, the pin 15 retracts into the inside of the circular groove 13 and is no longer inserted into the corresponding circular holes 5 on both sides. Move the bar 9 up and down until the position is adjusted, then release your hand. At this time, the spring 14 will return, and then the pin 15 will pop out. Then the pin 15 will be inserted into the corresponding circular holes 5 on both sides at the corresponding height, completing the adjustment of the height of the bar 9. Then place the tray 3 on the corresponding bar 9 on both sides, and then place the items to be dried on the tray 3. Close the upper door 2, turn on the hot air device 12, and the hot air device 12 will blow out hot air. Then the hot air will enter the interior of the cavity 10 and then enter the interior of the box 1 through the bar opening 11.

[0075] Working principle: When it is necessary to adjust the vertical height of the supporting structure, thereby changing the vertical height of the tray 3, slide the two sliders 7 towards the center point. Then the spring 14 is compressed, and the pin 15 slides into the inner side of the circular groove 13. At this time, the pin 15 retracts into the circular groove 13 and is no longer inserted into the corresponding circular holes 5 on both sides. Then move the bar 9 up and down. After the position is adjusted, release the hand. At this time, the spring 14 rebounds, and the pin 15 pops out. Then the pin 15 is inserted into the corresponding circular holes 5 on both sides, completing the vertical height adjustment of the bar 9. Then place the tray 3 on the corresponding bar 9 on both sides, and then place the items to be dried on the tray 3. Close the upper door 2, start the hot air device 12, and the hot air device 12 blows out hot air. Then the hot air enters the interior of the cavity 10 and then enters the interior of the box 1 through the bar opening 11.

[0076] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An inorganic pretreatment electric heating forced-air drying oven, characterized in that, Includes a box body (1), a hot air device (12) is provided on the top of the box body (1), a door (2) that can be opened and closed is hinged on one side of the box body (1), and a load-bearing structure that can be adjusted up and down is provided on both sides of the inner wall of the box body (1), and a tray (3) is placed on the load-bearing structure. One end of the load-bearing structure extends into the interior of the rectangular groove (4) on the inner wall. Two sets of spring structures are provided at the end of the load-bearing structure that extends into the interior of the rectangular groove (4). The spring structures are inserted into the corresponding circular insertion holes (5) on both sides. The load-bearing structure includes a rectangular fixing block (8) and a strip rod (9). The rectangular fixing block (8) is slidably engaged inside the rectangular groove (4) on the inner wall, and the strip rod (9) is fixedly installed at one end of the rectangular fixing block (8) extending to the outside of the rectangular groove (4). The strip rod (9) is attached to the inner wall of the box (1), and the spring structure is set inside the rectangular fixing block (8).

2. The inorganic pretreatment electric heating forced-air drying oven according to claim 1, characterized in that: A cavity (10) is provided in the inner wall of the back side of the box (1). The cavity (10) is connected to the air outlet of the hot air device (12). Multiple sets of strip-shaped openings (11) are provided at equal intervals on the inner wall of the cavity (10). The strip-shaped openings (11) are connected to the interior of the box (1).

3. The inorganic pretreatment electric heating forced-air drying oven according to claim 1, characterized in that: The tray (3) has multiple sets of waist holes at equal intervals.

4. An inorganic pretreatment electric heating forced-air drying oven according to claim 1, characterized in that: The rectangular fixing block (8) has circular grooves (13) on both sides. The spring structure includes a spring (14) and a pin (15). The spring (14) is fixedly installed inside the circular groove (13), and a pin (15) is fixedly installed at one end of the spring (14).

5. An inorganic pretreatment electric heating forced-air drying oven according to claim 4, characterized in that: A rectangular groove (6) is provided on the top of the rectangular fixing block (8), and a slider (7) is fixedly installed on the pin (15). The slider (7) extends to the outside of the rectangular fixing block (8) through the rectangular groove (6).

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