An even drying electric hot air drying oven

Abstract

This utility model relates to the field of drying oven technology, and more particularly to an electrically heated forced-air drying oven for uniform drying. It includes a drying oven body, a hot air blower fixedly installed on the outer wall of the drying oven body, a hot air distribution structure on the outer wall of the drying oven body, an internal air duct connected to the hot air blower through the hot air distribution structure, guide rails fixedly connected to both sides of the inner wall of the drying oven body, shelves with through holes slidably connected within the guide rails, a return air assembly for hot air recycling on the top of the drying oven body, and a cabinet door with a transparent observation window hinged to the open end of the drying oven body. This utility model, through the combination of multiple internal air ducts and rationally distributed air nozzles, achieves precise air delivery to different levels of shelves within the drying oven body, and the design of the return air assembly enables the recycling of hot air, reducing heat waste and lowering the energy consumption of the hot air blower.

Description

Technical Field

[0001] This utility model relates to the field of drying oven technology, and in particular to an electric heating forced-air drying oven for uniform drying. Background Technology

[0002] In numerous fields such as industrial production, scientific research experiments, and food processing, electric heating drying ovens are widely used as a common drying equipment for operations such as material dehydration, solidification, and sterilization. Their basic working principle involves generating heat through electric heating elements, and then using a fan to deliver hot air into the oven, thereby heating and drying the materials inside.

[0003] Existing electric heating drying ovens, such as the one disclosed in CN218443085U for uniform drying, employ a warm air blower mounted on the right side wall of the oven body. The bottom of the warm air blower is connected to a ventilation duct extending into the bottom of the oven body. Both ends of the ventilation duct are fitted with longitudinal air ducts that conform to the inner wall of the oven body. Multiple transverse air ducts connect between the longitudinal air ducts on both sides, and each transverse air duct has an outlet pipe connected to its top. Multiple support plates are mounted on both the left and right side walls of the oven body. However, the outlet pipes can only blow air to the bottom of the support plates. When drying multi-layered materials, the airflow from the bottom is blocked and interfered with by the upper layers of material as it flows upward, resulting in uneven airflow distribution in different areas of the oven body and a decrease in drying efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the air outlet pipe of the existing drying oven can only blow air to the bottom of the support plate. When drying multi-layer materials, the airflow at the bottom is blocked and interfered with by the upper layer of materials as it flows upward, resulting in uneven airflow distribution in different areas of the oven and reduced drying effect. Therefore, this invention proposes an electric heating blower drying oven for uniform drying.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A uniformly drying electric heating forced-air drying oven includes a drying oven body, a hot air blower fixedly installed on the outer wall of the drying oven body, a hot air diversion structure provided on the outer wall of the drying oven body, the hot air blower connected to an internal air duct through the hot air diversion structure, guide rails fixedly connected to both sides of the inner wall of the drying oven body, shelves with through holes slidably connected in the guide rails, a return air assembly for recycling hot air provided on the top of the drying oven body, and a cabinet door with a transparent observation window rotatably connected to the open end of the drying oven body via a hinge.

[0007] Preferably, the hot air diversion structure includes a diversion pipe fixedly connected to the air outlet of the hot air blower, mounting blocks are fixedly installed on both sides of the outer wall of the drying chamber body, and a main flow pipe is fixedly connected to the opposite sides of the two mounting blocks on the same side, and an air nozzle is fixedly connected to the outer wall of the drying chamber body of the internal air duct.

[0008] Preferably, two mounting blocks are provided on one side of the outer wall of the drying chamber body, and the two ends of the internal air duct are connected to the main air duct.

[0009] Preferably, the internal air ducts are provided with four ducts, with air nozzles provided on the upper and lower sides of the two middle ducts, an air nozzle provided at the bottom of the highest duct, and an air nozzle provided at the top of the lowest duct. The shelf is located in the middle of the internal air ducts.

[0010] Preferably, the return air assembly includes a guide shroud fixedly installed on the top of the drying chamber body, a return air duct is connected through the top of the guide shroud, a condenser dehumidifier is fixedly connected to the end of the return air duct away from the guide shroud, a return pipe is fixedly connected to the exhaust port of the condenser dehumidifier, and the return pipe is connected through the diversion pipe.

[0011] Preferably, the air guide is shaped like a bucket, and the top of the drying chamber body has a ventilation opening, which is completely covered by the air guide.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. In use, this utility model, through the cooperation of multiple internal air ducts and a reasonable distribution of air nozzles, achieves precise air delivery to different shelves within the drying chamber. Air nozzles are installed on both the upper and lower sides of the two middle internal air ducts, and at the bottom of the highest duct and the top of the lowest duct, respectively. The shelves are located in the middle of the internal air ducts, ensuring that the materials on each shelf are directly exposed to hot air. This effectively avoids the uneven airflow caused by obstruction by upper materials in traditional drying chambers, significantly improving the temperature uniformity of different areas within the chamber. This ensures that multiple layers of materials are simultaneously and thoroughly dried, significantly improving the drying effect and consistency.

[0014] 2. In use, this utility model can realize the recycling of hot air through the design of the return air component. The funnel-shaped guide hood can efficiently collect the hot air in the box, send it to the condenser dehumidifier through the return air pipe to remove moisture, and then reintroduce it into the distribution pipe through the return pipe to participate in the circulation. This not only reduces heat waste and lowers the energy consumption of the hot air blower, but also maintains the stability of humidity in the box, further optimizes the drying environment, and shortens the drying time. Attached Figure Description

[0015] Figure 1This is a three-dimensional structural diagram of an electric heating forced-air drying oven for uniform drying proposed in this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the back of an electric heating forced-air drying oven for uniform drying proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the internal three-dimensional structure of an electric heating forced-air drying oven for uniform drying proposed in this utility model.

[0018] In the diagram: 1. Drying oven body; 2. Hot air blower; 3. Hot air distribution structure; 4. Internal air duct; 5. Guide rail; 6. Shelf; 7. Return air assembly; 8. Cabinet door; 9. Distribution pipe; 10. Mounting block; 11. Main duct; 12. Air nozzle; 13. Air guide cover; 14. Return air duct; 15. Condensation dehumidifier; 16. Return pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-3 A uniformly drying electric heating blower drying oven includes a drying oven body 1. A hot air blower 2 is fixedly installed on the right outer wall of the drying oven body 1 by 8 M10 high-strength bolts. Spring washers are added at the bolt connections to prevent the equipment from loosening due to vibration during operation.

[0021] Hot air blower 2 uses a vortex fan, and its core motor adopts a fully enclosed air-cooled structure. The power is divided into 1.5kW-5kW depending on the volume of the drying box. It can achieve stepless temperature adjustment within the range of room temperature to 300℃, and the temperature control accuracy reaches ±0.5℃.

[0022] The outer wall of the drying chamber body 1 is provided with a hot air diversion structure 3. The hot air diversion structure includes a diversion pipe 9 fixedly connected to the air outlet of the hot air blower 2. Mounting blocks 10 are fixedly installed on both sides of the outer wall of the drying chamber body 1. Main stream pipes 11 are fixedly connected to the opposite sides of the two mounting blocks 10 on the same side. The internal air duct 4 is located inside the drying chamber body 1 and the outer wall is fixedly connected with a nozzle 12.

[0023] The hot air blower 2 is connected to the internal air duct 4 through the hot air diversion structure 3. The inner walls of the drying chamber body 1 are fixedly connected to the guide rails 5. The guide rails 5 are made of 304 stainless steel and are fixed to the inner walls of the drying chamber body 1 by symmetrical welding. There are three guide rails arranged vertically. The guide rails 5 are slidably connected to the shelves 6 with through holes. The cross section of the guide rail is U-shaped and the opening width matches the thickness of the shelf 6. The inner side is inlaid with polytetrafluoroethylene wear-resistant strips to reduce the resistance when the shelf 6 slides in the guide rail, which facilitates the loading and unloading of materials.

[0024] The shelf 6 has evenly distributed through holes, forming a regular honeycomb structure. This design allows hot air to pass smoothly through the shelf 6 and circulate freely between the upper and lower layers of materials, avoiding the problem of uneven local temperature caused by traditional solid shelves 6.

[0025] The top of the drying chamber body 1 is equipped with a return air assembly 7 for recycling hot air. The return air assembly 7 includes a guide hood 13 fixedly installed on the top of the drying chamber body 1. A return air pipe 14 is connected through the top of the guide hood 13. A condenser dehumidifier 15 is fixedly connected to the end of the return air pipe 14 away from the guide hood 13. The condenser dehumidifier 15 adopts a finned heat exchanger, which can quickly reduce the temperature of the recovered hot air from 80°C to 30°C, causing the moisture in it to condense into liquid water and be discharged through the drain outlet. It has high dehumidification efficiency and ensures that the recovered hot air will not bring in too much moisture, affecting the drying effect. A return pipe 16 is fixedly connected to the exhaust port of the condenser dehumidifier 15. The return pipe 16 is connected through the diversion pipe 9.

[0026] The opening end of the drying oven body 1 is connected to a cabinet door 8 with a transparent observation window via a hinge. The inside of the observation window is coated with an anti-fog coating, which can remain clear even at high temperatures, allowing operators to observe the drying status of the materials inside the oven at any time without opening the cabinet door, thus avoiding temperature fluctuations inside the oven.

[0027] Two mounting blocks 10 are provided on one side of the outer wall of the drying chamber body 1. The mounting blocks 10 are made of Q235 steel and are fixed to both sides of the outer wall of the drying chamber body 1 by welding. Two are symmetrically distributed on each side. The two ends of the internal air duct 4 are connected to the main air duct 11.

[0028] The internal air duct 4 consists of four sections. The two middle sections have nozzles 12 on both the top and bottom sides, the highest section has a nozzle 12 at the bottom, and the lowest section has a nozzle 12 at the top. A shelf 6 is positioned in the middle of the internal air duct 4. The installation angle of the nozzles 12 can be finely adjusted as needed to accommodate the drying requirements of different materials. Their number is rationally set according to the length of the internal air duct 4, ensuring uniform distribution of hot air within the chamber.

[0029] The air guide 13 is shaped like a bucket. The top of the drying chamber body 1 has a ventilation opening. The air guide 13 completely covers the ventilation opening. The bottom edge of the air guide 13 is tightly fitted with the edge of the ventilation opening at the top of the drying chamber body 1. A nitrile rubber sealing gasket with a temperature resistance of 200℃ is placed between the two. The gasket has a rectangular cross section. The air guide 13 is fixed to the top of the chamber with screws. The screws are evenly distributed to balance the force on the air guide 13, ensuring that the ventilation opening is completely covered and well sealed, thus preventing unfiltered outside air from entering the chamber.

[0030] It should be noted that the specific models and specifications of the hot air blower 2 and the condenser dehumidifier 15 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated here. Both can be powered by external equipment and controlled to turn on and off.

[0031] Working principle:

[0032] First, the operator places the material to be dried evenly on the shelf 6, closes the cabinet door 8, and starts the hot air blower 2. The hot air generated by the hot air blower 2 enters the main duct 11 through the diversion pipe 9, and is then distributed to each internal air duct 4, and evenly sprayed out through the air nozzles 12. The hot air forms a circulating airflow within the drying chamber body 1, passing through the honeycomb-shaped perforations of the shelf 6 to dry the material from all directions. The operator can monitor the material status in real time through the transparent observation window, and the temperature control system automatically maintains the set value to ensure a stable drying process.

[0033] During the drying process, hot and humid air enters the return air assembly 7 under the negative pressure of the guide hood 13. After being rapidly cooled and dehumidified by the condenser dehumidifier 15, the dried circulating air re-enters the hot air system through the return pipe 16. This system achieves the recycling of hot air, significantly reducing energy consumption. Once the material reaches the predetermined drying requirements, the equipment is shut down, and the finished product can be easily removed by sliding the shelf 6. The entire process balances energy efficiency and drying uniformity, making it particularly suitable for industrial drying scenarios with high temperature control accuracy requirements.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A uniformly drying electric heating forced-air drying oven, comprising an oven body (1), characterized in that, A hot air blower (2) is fixedly installed on the outer wall of the drying chamber body (1). A hot air diversion structure (3) is provided on the outer wall of the drying chamber body (1). The hot air blower (2) is connected to an internal air duct (4) through the hot air diversion structure (3). Guide rails (5) are fixedly connected to both sides of the inner wall of the drying chamber body (1). A shelf (6) with through holes is slidably connected in the guide rail (5). A return air assembly (7) for recycling hot air is provided on the top of the drying chamber body (1). A cabinet door (8) with a transparent observation window is rotatably connected to the open end of the drying chamber body (1) through a hinge.

2. The electrically heated forced-air drying oven for uniform drying according to claim 1, characterized in that, The hot air diversion structure includes a diversion pipe (9) fixedly connected to the air outlet of the hot air blower (2), mounting blocks (10) are fixedly installed on both sides of the outer wall of the drying box body (1), and a main pipe (11) is fixedly connected to the opposite side of the two mounting blocks (10) on the same side. The internal air duct (4) is located inside the drying box body (1) and a nozzle (12) is fixedly connected to the outer wall.

3. The electrically heated forced-air drying oven for uniform drying according to claim 2, characterized in that, Two mounting blocks (10) are provided on one side of the outer wall of the drying chamber body (1), and the two ends of the internal air duct (4) are connected to the main air duct (11).

4. The electrically heated forced-air drying oven for uniform drying according to claim 3, characterized in that, The internal air duct (4) is provided with four ducts. The two middle ducts are provided with air nozzles (12) on the upper and lower sides. The bottom of the highest duct (4) is provided with an air nozzle (12), and the top of the lowest duct (4) is provided with an air nozzle (12). The shelf (6) is located in the middle of the internal air duct (4).

5. The electric heating forced-air drying oven for uniform drying according to claim 2, characterized in that, The return air assembly (7) includes a guide hood (13) fixedly installed on the top of the drying chamber body (1). A return air pipe (14) is connected through the top of the guide hood (13). A condenser dehumidifier (15) is fixedly connected to one end of the return air pipe (14) away from the guide hood (13). A return pipe (16) is fixedly connected to the exhaust port of the condenser dehumidifier (15). The return pipe (16) is connected through the diversion pipe (9).

6. The electrically heated forced-air drying oven for uniform drying according to claim 5, characterized in that, The flow guide hood (13) is arranged in a bucket shape, and the top of the drying box body (1) is provided with a ventilation opening, which is completely covered by the flow guide hood (13).

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