Rotary hot blast stove

Abstract

The utility model provides a rotary hot blast stove which comprises an outer box body, a front door is installed on the front side of the outer box body, an inner box body is installed in the outer box body, a belt pulley installation frame is installed on the top of the inner box body, a belt pulley is installed on the belt pulley installation frame, and a rotary shaft which is vertically arranged downwards and penetrates through the inner box body is installed on the belt pulley. The rotating frame is installed in the inner box body, the bottom of the rotating frame is installed on a bottom plate of the inner box body through a bottom rotating shaft, the top of the rotating frame is connected with the rotating shaft, the reduction gearbox is installed on the top of the inner box body, an output shaft of the reduction gearbox is connected with the belt wheel through a belt, and an input shaft of the reduction gearbox is connected with the driving motor. A center air hole is formed in the center of a rear side plate of the inner box body, a fan is installed on the back side of the center air hole, and an annular electric heating pipe is installed on the outer side of the fan. The rotary hot-blast stove is simple in structure, reasonable in design and high in heating efficiency, and energy consumption is greatly reduced through the design of heating and air inducing structures.

Description

Technical Field

[0001] This utility model relates to the field of food processing equipment technology, specifically to a rotary hot air furnace. Background Technology

[0002] Existing food hot air ovens cannot rotate automatically when baking food, which results in uneven baking. Therefore, after baking for a certain period of time, the food needs to be moved manually to ensure even baking. This method results in low processing efficiency. For this reason, rotary hot air ovens have emerged.

[0003] The applicant previously applied for a rotary electric furnace (publication number: CN221301911U), which includes an insulated outer casing and an inner circulation furnace installed inside the casing. The inner circulation furnace includes an outer circulation chamber, an inner circulation chamber, and a hot air chamber, which are arranged sequentially from the outside to the inside. A circulation air chamber is provided on the top of the hot air chamber, and a circulation fan is installed in the circulation air chamber. The circulation air chamber is connected to the tops of the outer and inner circulation chambers respectively through circulation air ducts. A rotating device is installed between the outer and inner circulation chambers. The rotating device includes a support frame installed on the top of the inner circulation chamber, a geared motor installed on the support frame, a rotating bracket installed in the inner circulation chamber, a base support installed at the bottom of the rotating bracket, and a connecting shaft connecting the top of the rotating bracket to the output shaft of the geared motor. This rotary electric furnace has a simple structure and reasonable design. By adding a rotating device, the rotation of the food itself can be increased, making the food heated more evenly. However, in actual production and use, it was found that the above-mentioned rotary electric furnace has the following defects: (1) The internal circulation furnace is divided into an external circulation chamber, an internal circulation chamber and a hot air chamber, which makes the overall structure more complex and the equipment production cost higher; (2) The energy consumption is high. The heating mode of using electric heating tube bundles for centralized heating and then sending air out from the bottom of the hot air chamber through a circulating fan will increase the overall energy consumption of the equipment. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model proposes a rotary hot air furnace, which simplifies the equipment structure, reduces the equipment production cost, and significantly reduces energy consumption through the design of the heating and induced draft structure.

[0005] To achieve the above technical solution, this utility model provides a rotary hot air furnace, comprising: an outer casing, a front door installed on the front side of the outer casing, an inner casing installed inside the outer casing, a pulley mounting bracket installed on the top of the inner casing, a pulley mounted on the pulley mounting bracket, a vertically downward rotating shaft mounted on the pulley and penetrating the inner casing, a rotating frame installed inside the inner casing, the bottom of the rotating frame mounted on the bottom plate of the inner casing via a bottom pivot, the top of the rotating frame connected to the rotating shaft, a reduction gearbox installed on the top of the inner casing, the output shaft of the reduction gearbox connected to the pulley via a belt, the input shaft of the reduction gearbox connected to a drive motor, a central air hole provided at the center of the rear side plate of the inner casing, a fan installed on the back side of the central air hole, the fan blades at the front end of the fan facing the central air hole, and an annular electric heating tube installed on the outside of the fan.

[0006] In the above technical solution, during actual operation, the drive motor drives the reduction gearbox to rotate the pulley, which in turn drives the rotating frame to rotate within the inner chamber via the rotating shaft. This, in turn, causes the food placed on the rotating frame to rotate, resulting in more even heating of the food. Simultaneously, the annular heating element installed outside the fan heats the air, which is then directly introduced into the inner chamber through the central air vent by the fan. Combined with the slowly rotating frame, this achieves uniform and efficient heating of the food on the rotating frame.

[0007] Preferably, the inner casing is enclosed by a left side panel, a right side panel, a top panel, a bottom panel, and a rear side panel. A back panel for air ducts is installed side-by-side at intervals on the rear side of the rear side panel. The back panel for air ducts, together with the rear side panel, top panel, bottom panel, left side panel, and right side panel, forms a hot air cavity. The front end of the fan is installed inside the hot air cavity. In actual operation, the hot air cavity facilitates the formation and insulation of hot air, thereby improving heating efficiency.

[0008] Preferably, a fan mounting plate is installed on the back of the air cavity back plate, and the motor in the fan is fixed horizontally on the fan mounting plate. The fan blade assembly and the annular electric heating tube at the front end of the fan are both installed on the front side of the air cavity back plate and located inside the hot air cavity, so that the annular electric heating tube can efficiently heat the air in the hot air cavity, and the hot air in the hot air cavity can be quickly introduced into the inner box by the fan to improve the heating efficiency.

[0009] Preferably, a heat insulation plate is installed between the back plate of the air cavity and the back plate of the outer casing to prevent the back plate of the outer casing from overheating during operation.

[0010] Preferably, a smoke exhaust pipe is installed on the top of the inner box to facilitate the removal of smoke from the inner box.

[0011] Preferably, the top of the outer casing is equipped with an upper cover, which encloses the gearbox, drive motor, pulley, and exhaust pipe. A connection hole is provided between the exhaust pipe and the back plate of the upper cover so that the gearbox, drive motor, and pulley can operate in a closed environment.

[0012] Preferably, the front door is equipped with a viewing glass window to facilitate the operator's observation of the food on the rotating rack.

[0013] Preferably, a control panel is installed on the outer casing on one side of the front door to facilitate the setting of operating parameters.

[0014] The advantages of the rotary hot air furnace provided by this utility model are as follows: This rotary hot air furnace has a simple structure, reasonable design, low production cost, high heating efficiency, and uniform heat distribution within the chamber. Furthermore, the design of the heating and air intake structures reduces energy consumption. In actual operation, a drive motor drives a reduction gearbox to rotate a pulley, which in turn drives a rotating frame to rotate within the inner chamber via a rotating shaft. This, in turn, causes the food placed on the rotating frame to rotate, resulting in more uniform heating. Simultaneously, an annular electric heating element installed outside the fan heats the air, which is then directly introduced into the inner chamber through the central air vent. Combined with the slowly rotating frame, this achieves uniform and efficient heating of the food on the rotating frame. Attached Figure Description

[0015] Figure 1 This is a front view of the three-dimensional structure of this utility model.

[0016] Figure 2 This is an exploded three-dimensional structural diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the internal structure assembly of this utility model.

[0018] Figure 4 This is an exploded view of the internal structure assembly of this utility model.

[0019] Figure 5 This is a schematic diagram of a partial installation structure of the internal structure of this utility model.

[0020] In the diagram: 1. Outer casing; 2. Front door; 3. Viewing glass window; 4. Control panel; 5. Top cover; 6. Inner casing; 61. Left side panel; 62. Right side panel; 63. Top panel; 64. Bottom panel; 65. Rear side panel; 66. Central air vent; 67. Air cavity back panel; 68. Fan mounting plate; 7. Drive motor; 8. Gearbox; 9. Pulley; 10. Pulley mounting bracket; 11. Rotating shaft; 12. Rotating frame; 13. Smoke exhaust pipe; 14. Heat insulation plate; 15. Fan; 16. Annular electric heating element; 17. Bottom rotating shaft. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 without creative effort are within the protection scope of the present utility model.

[0022] Example: A rotary hot air furnace.

[0023] Reference Figures 1 to 5 As shown, a rotary hot air oven includes: an outer casing 1, a front door 2 installed on the front side of the outer casing 1, a viewing glass window 3 installed on the front door 2 to facilitate the operator's observation of the food on the rotating rack 12, and a control panel 4 installed on the outer casing 1 on one side of the front door 2 to facilitate the setting of working parameters.

[0024] An inner casing 6 is installed inside the outer casing 1. The inner casing 6 is enclosed by a left side panel 61, a right side panel 62, a top panel 63, a bottom panel 64, and a rear side panel 65. A back air chamber panel 67 is installed side-by-side at intervals on the rear side of the rear side panel 65. The back air chamber panel 67, together with the rear side panel 65, top panel 63, bottom panel 64, left side panel 61, and right side panel 62, forms a hot air chamber. The hot air chamber facilitates the formation and insulation of hot air, thereby improving heating efficiency. A central air vent 66 is provided in the center of the rear side panel 65, and a fan is installed on the back side of the central air vent 66. 15. The fan blades at the front end of the fan 15 are positioned directly opposite the central air vent 66. An annular electric heating tube 16 is installed on the outer side of the fan 15. A fan mounting plate 68 is installed on the back of the air cavity back plate 67. The motor in the fan 15 is fixed laterally on the fan mounting plate 68. The fan blade assembly and the annular electric heating tube 16 at the front end of the fan 15 are both installed on the front side of the air cavity back plate 67 and located inside the hot air cavity. This allows the annular electric heating tube 16 to efficiently heat the air inside the hot air cavity, and the fan 15 to quickly introduce the hot air from the hot air cavity into the inner casing 6, improving heating efficiency. A heat insulation plate 14 is installed between the air cavity back plate 67 and the back plate of the outer casing 1 to prevent the back plate of the outer casing 1 from overheating during operation.

[0025] A pulley mounting bracket 10 is installed on the top of the inner box 6. A pulley 9 is mounted on the pulley mounting bracket 10. A vertically downward rotating shaft 11 is mounted on the pulley 9, penetrating the top plate 63 of the inner box 6. A rotating frame 12 is installed inside the inner box 6. The bottom of the rotating frame 12 is mounted on the bottom plate 64 of the inner box 6 via a bottom pivot 17. The top of the rotating frame 12 is connected to the rotating shaft 11. A reduction gearbox 8 is installed on the top of the inner box 6. The output shaft of the reduction gearbox 8 is connected to the pulley 9 via a belt, and the input shaft of the reduction gearbox 8 is connected to the drive motor 7. In actual operation, the drive motor 7 drives the reduction gearbox 8 to rotate the pulley 9, which in turn drives the rotating frame 12 to rotate inside the inner box 6 via the rotating shaft 11. This causes the food placed on the rotating frame 12 to rotate, resulting in more even heating of the food. Meanwhile, the annular electric heating tube 16 installed on the outside of the fan 15 heats the air, which is then introduced directly into the inner box 6 through the central air hole 66 via the fan 15. Combined with the slowly rotating rack 12, this enables uniform and efficient heating of the food on the rotating rack 12.

[0026] In this embodiment, an exhaust pipe 13 is installed on the top of the inner housing 6 to facilitate the removal of smoke from the inner housing 6. An upper cover 5 is installed on the top of the outer housing 1. The upper cover 5 encloses the gearbox 8, drive motor 7, pulley 9, and exhaust pipe 13. A connection hole is provided between the exhaust pipe 13 and the back plate of the upper cover 5 so that the gearbox 8, drive motor 7, and pulley 9 can operate in a sealed environment and facilitate the exhaust of smoke to the outside.

[0027] This rotary hot air furnace has a simple structure, reasonable design, low equipment production cost, high heating efficiency, uniform heat distribution inside the chamber, and significantly reduced energy consumption through the design of the heating and induced draft structures.

[0028] The above description is only a preferred embodiment of the present utility model. However, the present utility model should not be limited to the content disclosed in the embodiments and drawings. Therefore, any equivalent or modified embodiments made without departing from the spirit disclosed in the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A rotary hot air furnace, comprising: An outer casing with a front door installed on its front side and an inner casing installed inside the outer casing, characterized in that: a pulley mounting bracket is installed on the top of the inner casing, a pulley is mounted on the pulley mounting bracket, a vertically downward rotating shaft is mounted on the pulley and passes through the inner casing, a rotating frame is installed inside the inner casing, the bottom of the rotating frame is mounted on the bottom plate of the inner casing via a bottom rotating shaft, the top of the rotating frame is connected to the rotating shaft, a reduction gearbox is installed on the top of the inner casing, the output shaft of the reduction gearbox is connected to the pulley via a belt, the input shaft of the reduction gearbox is connected to a drive motor, a central air hole is provided in the center of the rear side plate of the inner casing, a fan is installed on the back side of the central air hole, the fan blades at the front end of the fan are positioned facing the central air hole, and an annular electric heating tube is installed on the outside of the fan.

2. The rotary hot blast stove as described in claim 1, characterized in that: The inner casing is enclosed by a left side panel, a right side panel, a top panel, a bottom panel, and a rear side panel. A back panel for the air cavity is installed side by side at intervals on the rear side of the rear side panel. The back panel for the air cavity, together with the rear side panel, the top panel, the bottom panel, the left side panel, and the right side panel, encloses a hot air cavity. The front end of the fan is installed inside the hot air cavity.

3. The rotary hot blast stove as described in claim 2, characterized in that: A fan mounting plate is installed on the back of the air cavity back plate. The motor in the fan is fixed horizontally on the fan mounting plate, and the fan blade assembly and annular electric heating tube at the front end of the fan are installed on the front side of the air cavity back plate and located inside the hot air cavity.

4. The rotary hot blast stove as described in claim 2, characterized in that: A heat insulation plate is installed between the back panel of the air cavity and the back panel of the outer casing.

5. The rotary hot blast stove as described in claim 1, characterized in that: The top of the inner casing is equipped with a smoke exhaust pipe.

6. The rotary hot blast stove as described in claim 5, characterized in that: The top of the outer casing is equipped with an upper cover, which encloses the gearbox, drive motor, pulley, and exhaust pipe. A connection hole is provided between the exhaust pipe and the back plate of the upper cover.

7. The rotary hot blast stove as described in claim 1, characterized in that: The front door is equipped with a viewing glass window.

8. The rotary hot blast stove as described in claim 1, characterized in that: A control panel is installed on the outer casing on one side of the front door.

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