Hot air circulation drying oven for drying tablets

Abstract

The utility model relates to a hot air circulating oven for drying tablets, and belongs to the technical field of ovens. Comprising a box body, a box door, a medicine taking tray and a tray, the box door is hinged to the box body, a hot air assembly is arranged at the top of the box body, an air opening is formed in the box body below the hot air assembly, an air cavity is formed in the box body below the air opening, air channels are arranged in the box body side edges at the two ends of the air cavity respectively, and air holes are formed in the inner top face, corresponding to the air cavity, of the box body. A plurality of trays are arranged in the box body at intervals, medicine taking trays are sleeved on the trays, the trays are communicated with the air duct, a plurality of air return ports are formed in the box body at intervals, and the air return ports are communicated with the hot air assembly through air return pipelines. According to the hot air circulation oven for tablet drying, tablets do not need to be manually turned over, the upper surfaces and the lower surfaces of the tablets can be dried, and the tablet drying work efficiency and the tablet yield are improved.

Description

Technical Field

[0001] This utility model relates to a hot air circulating oven for drying pharmaceutical tablets, belonging to the field of oven technology. Background Technology

[0002] After pharmaceutical factories process drugs into tablets, they are placed in a hot air circulating box for drying to remove moisture. Existing hot air circulating boxes use a blower motor to drive a fan, which generates air that is heated by a heater. This hot air travels through ducts to the oven chamber, and the used hot air is then drawn back into the ducts for recirculation. However, the tablets to be dried are usually placed flat on a tray inside the hot air circulating box. Because the lower surface of the tablets is in contact with the tray, the hot air cannot reach the lower surface, resulting in uneven drying of the upper and lower surfaces. Removing the tray and flipping the tablets during the drying process is cumbersome, time-consuming, and labor-intensive, leading to low drying efficiency. Uneven drying of the upper and lower surfaces directly affects the yield rate of the tablets. Therefore, improvements are necessary. Summary of the Invention

[0003] The purpose of this invention is to provide a hot air circulating oven for drying tablets that can dry the upper and lower surfaces of tablets without requiring manual turning, thereby improving the efficiency and yield of tablets.

[0004] The technical solution of this utility model is:

[0005] A hot air circulating oven for drying tablets includes a box body, a door, a dispensing tray, and a pallet. The oven body is characterized by: a hinged door; a hot air assembly at the top of the box body; an air vent below the hot air assembly; an air cavity below the air vent; air ducts inside the sides of the box body at both ends of the air cavity; air holes on the top surface of the box body corresponding to the air cavity; multiple pallets spaced apart inside the box body; a dispensing tray fitted onto each pallet; the pallets communicating with the air ducts; and multiple return air vents spaced apart on the box body, which are connected to the hot air assembly via return air ducts.

[0006] The hot air assembly includes a hot air box, a drive motor, fan blades, and a heating tube. The drive motor is fixedly installed on the top of the hot air box, and the drive shaft of the drive motor extends into the hot air box. The fan blades are mounted on the drive shaft extending into the hot air box, and the heating tubes are installed in the hot air box below the fan blades.

[0007] The tray includes a base and a top. The base is rectangular and has a hot air channel inside. Multiple air holes are provided on the upper and lower surfaces of the base. The top is fixedly installed on the upper surface of the base corresponding to the air holes. The top is conical and has a cavity inside. Multiple hot air holes are provided on the circumference of the top. The cavity of the top is connected to the air holes and the hot air holes.

[0008] A heat-insulating silicone layer is provided on the upper surface of the support, and the heat-insulating silicone layer is conical.

[0009] The medicine dispensing tray is a rectangular plate with clearance holes corresponding to the top of the tray, and handles are fixedly installed at both ends of the tray.

[0010] An inner boss is provided on the inner wall of the box corresponding to the tray. The inner boss is used to limit the position of the tray. A connecting hole is provided on the inner wall of the box above the inner boss. The connecting hole allows the hot air channel of the bottom tray to be connected to the air duct on the side of the box.

[0011] The advantages of this utility model compared with the prior art are as follows:

[0012] This hot air circulating oven for drying tablets lays an appropriate amount of tablets flat on a dispensing tray. Multiple trays pass through clearance holes in the tray to lift the tablets. Hot air enters the air ducts on both sides of the oven, passes through the air vents on the upper surface of the tray and the hot air channel inside the tray. Part of the hot air is discharged outward from the cavity of the tray through the hot air vents to dry the lower surface of the tablets, while the other part continues to blow downward from the air vents on the lower surface of the tray to dry the tablets on another tray below. Through hot air circulation within the oven, the tablets are dried. This hot air circulating oven for drying tablets eliminates the need for manual turning of the tablets and can dry both the upper and lower surfaces of the tablets, improving the efficiency of tablet drying and the yield of good tablets. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective;

[0015] Figure 3 This is an exploded three-dimensional structural diagram of the tray and medicine dispensing tray in this utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the tray in this utility model;

[0017] Figure 5 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0018] In the diagram: 1. Box body; 2. Box door; 3. Medicine tray; 4. Hot air box; 5. Drive motor; 6. Fan blade; 7. Heating element; 8. Air outlet; 9. Air cavity; 10. Air duct; 11. Air hole; 12. Base support; 13. Top support; 14. Hot air passage; 15. Air blowing hole; 16. Cavity; 17. Hot air hole; 18. Thermal insulation silicone layer; 19. Clearance hole; 20. Handle; 21. Inner boss; 22. Connecting hole; 23. Return air outlet; 24. Return air duct. Detailed Implementation

[0019] As attached Figure 1-5 As shown

[0020] The hot air circulating oven for drying tablets includes a box body 1, a door 2, a dispensing tray 3, and a pallet. The door 2 is hinged to the box body 1. One end of the door 2 is hinged to the frame of the box body 1, and the other end of the door 2 is detachably locked to the frame of the box body 1 through a locking ring and a pin (not shown in the figure).

[0021] A hot air assembly is provided on the top of the housing 1. The hot air assembly includes a hot air box 4, a drive motor 5, fan blades 6, and a heating tube 7. The drive motor 5 is fixedly installed on the top of the hot air box 4. The drive shaft of the drive motor 5 extends into the hot air box 4. The fan blades 6 are fixedly installed on the drive shaft extending into the hot air box 4. The heating tube 7 is provided in the hot air box 4 below the fan blades 6. When working, the drive shaft of the drive motor 5 drives the fan blades 6 to rotate. The fan blades 6 continuously push the airflow forward. The negative pressure generated on the back of the fan blades 6 continuously replenishes the air behind the fan blades 6, thereby generating an air source that blows towards the heating tube 7. The heating tube 7 heats the air to generate hot air.

[0022] An air vent 8 is provided on the housing 1 below the hot air assembly. An air chamber 9 is provided in the housing 1 below the air vent 8. Air ducts 10 are respectively provided in the side of the housing 1 at both ends of the air chamber 9. An air hole 11 is provided on the top surface of the housing 1 corresponding to the air chamber 9. When working, the hot air generated by the hot air assembly enters the air chamber 9 through the air vent 8. Part of the hot air entering the air chamber 9 continues to advance along the air ducts 10 on both sides of the housing 1, and the other part of the hot air enters the interior of the housing 1 through the air hole 11 to dry the tablets.

[0023] Multiple trays are spaced apart inside the housing 1. Each tray includes a base 12 and a top 13. The base 12 is rectangular and has a hot air channel 14 inside. Multiple air holes 15 are provided on the upper and lower surfaces of the base 12. The top 13 is fixedly installed on the upper surface of the base 12 corresponding to the air outlet 8. The top 13 is conical and has a cavity 16 inside. Multiple hot air holes 17 are provided on the circumference of the top 13. The cavity 16 of the top 13 is connected to the air holes 15 and the hot air holes 17. During operation, the hot air entering the air ducts 10 on both sides of the housing 1 passes through the air holes 15 on the upper surface of the base 12 and the hot air channel 14 inside the base 12. Part of the hot air is discharged outward from the cavity 16 of the top 13 through the hot air holes 17, and the other part continues to be blown downward from the air holes 15 on the lower surface of the base 12 to dry the tablets on the tray below.

[0024] A heat-insulating silicone layer 18 is provided on the upper surface of the support 13. The heat-insulating silicone layer 18 effectively prevents the support 13 from directly contacting the tablet and easily burning the tablet. The heat-insulating silicone layer 18 is conical in shape, which effectively reduces the contact area between the heat-insulating silicone layer 18 and the tablet, thereby further reducing the problem of the heat-insulating silicone layer 18 blocking the lower surface of the tablet and affecting the drying effect. At the same time, the support 13 can lift the tablet, so that the lower surface of the tablet is suspended, which helps the hot air to dry the lower surface of the tablet and ensures that the upper and lower surfaces of the tablet are dried evenly.

[0025] A medicine dispensing tray 3 is mounted on the tray. The medicine dispensing tray 3 is a rectangular plate. A clearance hole 19 is provided on the medicine dispensing tray 3 corresponding to the top of the tray 13. A handle 20 is fixedly installed at both ends of the medicine dispensing tray 3. During operation, the medicine dispensing tray 3 can be taken out of the tray through the handle 20. During the removal process, since the diameter of the clearance hole 19 is smaller than the diameter of the tablet, the medicine dispensing tray 3 can hold the tablet, thereby quickly removing the tablet from the tray.

[0026] An inner boss 21 is provided on the inner wall of the box 1 corresponding to the pallet. The inner boss 21 is used to limit the pallet. A connecting hole 22 is provided on the inner wall of the box 1 above the inner boss 21. The connecting hole 22 allows the hot air channel 14 of the bottom support 12 to connect with the air duct 10 on the side of the box 1.

[0027] The tray is connected to the air duct 10. Multiple return air inlets 23 are spaced apart on the box 1. The return air inlets 23 are connected to the hot air assembly through the return air duct 24. One end of the return air duct 24 is set on the hot air box 4 on the back of the fan blade 6. During operation, the negative pressure on the back of the fan blade 6 can be used to draw the air in the box 1 through the return air inlets 23 and the return air duct 24 to the back of the fan blade 6, and continue to push it forward under the action of the fan blade 6 rotation, thereby forming a hot air circulation in the box 1.

[0028] The hot air circulating oven for drying tablets has a high-temperature dehumidifier (not shown in the figure) installed on the top of the chamber 1. The high-temperature dehumidifier is existing technology. During operation, the high-temperature dehumidifier can exhaust the moisture in the chamber 1. A return air fan (not shown in the figure) can be installed on the return air duct 24. The return air fan can increase the return air rate of the return air duct and effectively improve the hot air circulation rate of the hot air circulating oven.

[0029] When using the hot air circulating oven for drying tablets, first spread an appropriate amount of tablets to be dried flat on the dispensing tray 3, then place the dispensing tray 3 inside the box body 1, so that the top 13 of the tray corresponds to the clearance hole 19 of the dispensing tray 3, and place the dispensing tray 3 on the bottom support 12 of the tray. During the placement of the dispensing tray 3, multiple tops 13 pass through the clearance hole 19 of the dispensing tray 3 to lift the tablets, so as to facilitate the subsequent drying operation.

[0030] After the tablets to be dried are placed, the drive motor 5 is started, and the heating tube 7 is turned on. The drive shaft of the drive motor 5 drives the fan blades 6 to rotate. The fan blades 6 continuously push the airflow forward, and the negative pressure generated on the back of the fan blades 6 continuously replenishes the air behind the fan blades 6, thereby generating an air source that blows towards the heating tube 7. The heating tube 7 heats the air to generate hot air. The hot air enters the air chamber 9 through the air outlet 8. Part of the hot air entering the air chamber 9 continues to advance along the air ducts 10 on both sides of the box 1, and the other part of the hot air enters the interior of the box 1 through the air holes 11 to dry the tablets. The hot air entering the air ducts 10 on both sides of the box 1 passes through the air blowing holes 15 on the upper surface of the base 12 and the hot air channel 1 inside the base 12. After 4, a portion of the hot air is discharged from the cavity 16 of the top tray 13 through the hot air hole 17 to dry the lower surface of the tablets. Another portion continues to be blown downwards through the air blowing hole 15 on the lower surface of the bottom tray 12 to dry the tablets on another tray below the tray. Under the negative pressure on the back of the fan blade 6, the hot air in the chamber 1 can be drawn to the back of the fan blade 6 through the return air port 23 and the return air pipe 24, and then pushed forward by the rotation of the fan blade 6, thus forming a hot air circulation in the chamber 1 to dry the tablets. This hot air circulation oven for drying tablets does not require manual turning of the tablets and can dry the upper and lower surfaces of the tablets, improving the efficiency of tablet drying and the yield of good tablets.

Claims

1. A hot air circulation oven for drying of tablets, comprising a cabinet (1), a cabinet door (2), a tablet tray (3) and a tray, characterized in that: A door (2) is hinged to the box body (1). A hot air assembly is installed on the top of the box body (1). An air vent (8) is installed on the box body (1) below the hot air assembly. An air cavity (9) is installed on the box body (1) below the air vent (8). Air ducts (10) are respectively installed on the side of the box body (1) at both ends of the air cavity (9). An air hole (11) is installed on the top surface of the box body (1) corresponding to the air cavity (9). Multiple trays are spaced apart inside the box body (1). A medicine dispensing tray (3) is fitted on the tray. The tray is connected to the air duct (10). Multiple return air vents (23) are spaced apart on the box body (1). The return air vents (23) are connected to the return air duct. (24) Connected to the hot air assembly; the tray includes a base (12) and a top (13). The base (12) is rectangular. A hot air channel (14) is provided inside the base (12). Multiple air holes (15) are provided on the upper and lower surfaces of the base (12). The top (13) is fixedly installed on the upper surface of the base (12) corresponding to the air outlet (8). The top (13) is conical. A cavity (16) is provided inside the top (13). Multiple hot air holes (17) are provided on the circumference of the top (13). The cavity (16) of the top (13) is connected to the air holes (15) and the hot air holes (17) respectively.

2. A hot air circulating oven for drying of tablets as claimed in claim 1, wherein: The hot air assembly includes a hot air box (4), a drive motor (5), a fan blade (6), and a heating tube (7). The drive motor (5) is fixedly installed on the top of the hot air box (4). The drive shaft of the drive motor (5) extends into the hot air box (4). The fan blade (6) is mounted on the drive shaft extending into the hot air box (4). The heating tube (7) is installed in the hot air box (4) below the fan blade (6).

3. The hot air circulating oven for drying of tablets as claimed in claim 1 wherein: A heat-insulating silicone layer (18) is provided on the upper surface of the support (13), and the heat-insulating silicone layer (18) is conical.

4. The hot air circulating oven for drying of tablets as claimed in claim 1 wherein: The medicine dispensing tray (3) is a rectangular plate. The medicine dispensing tray (3) is provided with clearance holes (19) corresponding to the support (13). The two ends of the medicine dispensing tray (3) are respectively fixedly installed with handles (20).

5. The hot air circulating oven for drying of tablets as claimed in claim 1 wherein: The inner wall of the box (1) corresponding to the tray is provided with an inner boss (21) to limit the tray. The inner boss (21) is provided with a connecting hole (22) on the inner wall of the box (1) above the inner boss (21) to allow the hot air channel (14) of the bottom tray (12) to connect with the air duct (10) on the side of the box (1).

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