Coffee bean baking process and equipment

Abstract

The invention provides a coffee bean baking process and equipment, and relates to the technical field of coffee bean baking, the coffee bean baking equipment comprises a baking shell, a waste shell, a baking frame and a base, the baking shell and the waste shell are both hemispherical shells and are installed through threads to form a complete spherical shell shape, and the baking shell is concentrically and rotatably installed on the baking frame through a shaft pipe; an annular air cavity is formed in one end wall of the base, an electric heating wire is arranged in the annular air cavity, the switching assembly is installed on the outer side of the baking shell, the hot air assembly is installed between the baking shell and the base, and the heating assembly is installed on the baking frame. According to the coffee bean baking machine, the baking shell and the waste shell are combined and used in cooperation with the hot air assembly and the heating assembly, switching of three baking modes of direct fire type, semi-hot air type and hot air type of coffee beans is achieved, the baking shell and the waste shell are integrally designed in a globe mode, and the baking uniformity of the coffee beans is effectively improved through the rotation and revolution combined mode during baking.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee bean roasting, and in particular to a coffee bean roasting process and equipment. Background Art

[0002] The core purpose of coffee bean roasting is to transform the underlying flavor of the raw beans into a perceptible aroma and taste through high temperatures, triggering chemical and physical changes. This process not only determines the balance of acidity, sweetness, and bitterness in the coffee, but also shapes its unique flavor profile. There are three main roasting methods for coffee beans: direct flame, semi-hot air, and hot air. Each method has its own advantages and disadvantages, and the choice depends on the type of coffee beans and the desired coffee flavor.

[0003] Traditional roasting equipment can only provide one roasting method and cannot meet the roasting needs of different varieties of coffee beans. In order to improve the uniformity of coffee bean roasting, roasting equipment must be equipped with stirring equipment. Traditional roasting equipment has a single stirring method and cannot meet the requirements of ultimate roasting uniformity of coffee beans. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the conventional roasting equipment in the prior art that it cannot meet the roasting requirements of different varieties of coffee beans and cannot meet the requirements of the ultimate roasting uniformity of coffee beans.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a coffee bean roasting device, comprising a roasting shell, a waste shell, a roasting rack and a base, wherein the roasting shell and the waste shell are both hemispherical shells and are threadedly mounted to form a complete spherical shell shape, the roasting shell is provided with two rows of exhaust holes in an annular array, a filter is provided at the connection between the roasting shell and the waste shell, an axis tube is fixedly mounted at the center of the top of the roasting shell, a cleaning hole is provided at the center of the bottom of the waste shell, and a plug is threadedly mounted in the cleaning hole, the roasting rack is semi-circular arc-shaped, and the roasting shell is rotatably mounted on the roasting rack via the axis tube concentrically, two connected arc grooves are provided in the roasting rack, and two tooth rollers are symmetrically mounted at the connection point of the two arc grooves, an annular air cavity is provided in one end wall of the base, and an electric heating wire is provided in the annular air cavity, and further comprising:

[0006] a switching assembly mounted on the outside of the baking shell;

[0007] a hot air assembly installed between the baking shell and the base;

[0008] A heating component is installed on the baking rack.

[0009] In at least some embodiments, a driven bevel gear is fixedly mounted on the shaft tube, a shaft seat is fixedly welded on the baking rack, and a connecting shaft for driving the baking shell to rotate is rotatably mounted in the shaft seat, a driving bevel gear meshing with the driven bevel gear is fixedly mounted on one end of the connecting shaft, a driven gear is fixedly mounted on the other end of the connecting shaft, and a fixed gear ring meshing with the driven gear is fixedly mounted on the base.

[0010] In at least some embodiments, the base is provided with an air inlet tangent to the wind cavity, a clamping ring is fixedly installed in a circular array in the wind cavity of the base, the heating wire is in a spiral ring shape and is arranged in the clamping ring, and the clamping ring is provided with a plurality of hooks in a circular array for clamping the heating wire.

[0011] In at least some embodiments, the switching assembly includes a ball cover, a holder, and a limit pin. The ball cover is concentrically rotatably sleeved on the outer end of the baking shell. The ball cover is provided with a plurality of notches for ventilation in an annular array and a circular opening with teeth on the top.

[0012] In at least some embodiments, the socket is fixedly mounted on the shaft tube, two horizontal guide grooves are provided on both sides of the socket, two limit pins are provided, and guide columns that are slidably adapted to the guide grooves are provided on both sides, two connecting rods are movably inserted between the two limit pins, and limiting plates are provided at both ends of the connecting rods, and a first spring is provided on a section of the connecting rod located between the two limit pins, and the limit pin is clamped in the teeth of the top opening of the ball cover by the elastic force of the first spring.

[0013] In at least some embodiments, the hot air assembly includes a swirl disk and a sealing cover plate. The bottom of the swirl disk is arranged close to the filter screen, and a connecting pipe is rotatably installed on the top of the swirl disk. The sealing cover plate is rotatably installed on the annular air cavity on the base and the sealing cover plate is fixedly connected to the connecting pipe.

[0014] In at least some embodiments, the swirl disk is fixedly mounted with a plurality of stirring bars in a circular array, wherein the stirring bars are composed of arc segments and horizontal segments, the arc segments of the stirring bars are arranged concentrically with the baking shell, and the straight segments of the stirring bars are arranged closely to the filter screen.

[0015] In at least some embodiments, the heating assembly includes an arc-shaped plate and a limit seat. Two arc-shaped plates are provided and are rotatably installed in two arc-shaped grooves of the baking rack respectively. Both arc-shaped plates are provided with teeth meshing with toothed rollers. The meshing action of the teeth and the toothed rollers causes the two arc-shaped plates to rotate in opposite directions at the same speed. A rotating seat is provided on the top of one of the arc-shaped plates, and two infrared heating plates are provided on the two arc-shaped plates and the inner arc surface of the baking rack.

[0016] In at least some embodiments, a torsion spring is installed between the rotating seat and the baking rack, two bosses are provided at the bottom of the limit seat, and holes that are compatible with the bosses are opened at the top of the baking rack corresponding to the exhaust holes. The limit seat is movably inserted into the rotating seat through the two bosses, and a limit plate is provided on the boss and a second spring is provided between the limit plate and the rotating seat.

[0017] A coffee bean roasting process comprises the following steps:

[0018] S1. Add coffee beans when the roasting shell opening is facing up, and install the filter and waste shell;

[0019] S2. Select direct flame roasting, semi-hot air roasting, or hot air roasting according to the coffee bean type and requirements and start the equipment;

[0020] S3. After baking, open the waste shell upwards, unscrew the plug and drive the waste shell to shake through the cleaning port at the bottom to clean the silver scraps.

[0021] S4. After the waste is cleaned, the roasting shell is opened upward, the waste shell and the filter are removed, and the roasted coffee beans are collected.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are:

[0023] 1. In the present invention, the number of exhaust holes on the roasting shell is adjusted by rotating the ball cover in the switching assembly, and the two heating methods of heating, namely, the infrared heating plate on the roasting rack and the curved plate in the heating assembly, and the hot air heating of the hot air assembly, are combined to achieve the purpose of selecting direct fire, semi-hot air and hot air roasting according to different types of coffee beans, thereby improving the roasting effect of the equipment and solving the problem of traditional roasting equipment with a single roasting method.

[0024] 2. In the present invention, during the roasting process, the motor drives the roasting rack to rotate, and the rotation of the roasting rack drives the roasting shell to revolve around the horizontal axis. At the same time, the roasting rack drives the roasting shell to rotate around the vertical axis. The revolution and rotation are used to make the coffee beans roll in all directions during the roasting process, thereby improving the uniformity of the coffee beans roasting; by rotating the rotating seat in the heating assembly, one curved plate is driven to rotate, and by meshing with the toothed roller, the other curved plate is driven to rotate in the opposite direction, so that the two curved plates are unfolded into an "X" shape, and cooperate with the curved plates and the infrared heating plate inside the roasting rack to achieve the purpose of multi-angle uniform heating, thereby improving the uniformity of direct fire roasting and semi-hot air roasting.

[0025] 3. In the present invention, after the two arc-shaped plates in the heating assembly are unfolded, the limit seat is released and the elastic action of the second spring is used to insert the protruding column into the other pair of holes to form a rotation limit. In the switching assembly, the elastic action of the first spring causes the two limit pins to spring open and engage with the teeth on the top of the ball cover to form an engagement, ensuring that the ball cover will not rotate when the baking shell rotates, thereby ensuring the stability of the overall operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention provides an overall three-dimensional schematic diagram of a coffee bean roasting device;

[0027] Figure 2 The present invention provides a schematic diagram of the connection between a roasting shell and a waste shell in a coffee bean roasting device;

[0028] Figure 3 The present invention provides a structural schematic diagram of a switching component in a coffee bean roasting device;

[0029] Figure 4 The present invention provides a schematic structural diagram of a hot air component in a coffee bean roasting device;

[0030] Figure 5 The present invention provides a schematic diagram of the connection between a roasting rack and a heating component in a coffee bean roasting device;

[0031] Figure 6 The present invention provides a structural schematic diagram of a roasting rack in a coffee bean roasting device;

[0032] Figure 7 The present invention provides a schematic structural diagram of a heating component in a coffee bean roasting device;

[0033] Figure 8 The present invention provides a schematic diagram of the connection between a base and a hot air component in a coffee bean roasting device;

[0034] Figure 9 The present invention provides a structural schematic diagram of a base in a coffee bean roasting device.

[0035] Legend: 1. Baking shell; 101. Filter; 102. Mounting ring; 103. Shaft tube; 104. Driven bevel gear;

[0036] 2. Waste shell; 201. Sealing head;

[0037] 3. Baking rack; 301. Shaft seat; 302. Connecting shaft; 303. Driving bevel gear; 304. Driven gear; 305. Gear roller;

[0038] 4. Base; 401. Air inlet; 402. Fixed gear ring; 403. Snap ring; 404. Heating wire; 405. Hook;

[0039] 5. Switching assembly; 501. Ball cover; 502. Socket; 503. Limit pin; 504. Connecting rod; 505. First spring;

[0040] 6. Hot air assembly; 601. Swirl disk; 602. Sealing cover; 603. Connecting pipe; 604. Stirring bar;

[0041] 7. Heating assembly; 701. Arc plate; 702. Limiting seat; 703. Rotating seat; 704. Torsion spring; 705. Boss; 706. Second spring. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Embodiment, according to Figures 1-9 ,like Figure 1 As shown, a coffee bean roasting device provided by an embodiment of the present invention includes a roasting shell 1, a waste shell 2, a roasting rack 3 and a base 4. The roasting shell 1 and the waste shell 2 are both hemispherical shells and are screwed together to form a complete spherical shell shape. The roasting shell 1 is provided with two rows of exhaust holes in a circular array, such as Figure 2 As shown, a mounting ring 102 is provided at the opening of the baking shell 1, and positioning posts are provided in a circular array on the mounting ring 102. A filter screen 101 is provided at the connection between the baking shell 1 and the waste shell 2, and positioning holes for positioning and installation are provided on the filter screen 101 corresponding to the positions of the positioning posts. A shaft tube 103 is fixedly installed at the center of the top of the baking shell 1, and a cleaning hole is provided at the center of the bottom of the waste shell 2, and a plugging head 201 is threadedly installed in the cleaning hole. After unscrewing the plugging head 201, the silver scraps can be cleaned through the cleaning hole. The baking rack 3 is semi-arc-shaped, and the baking shell 1 is rotatably installed on the baking rack 3 through the shaft tube 103 concentrically. Figure 5 and Figure 6As shown, two connected arc-shaped grooves are defined in the baking rack 3, and two tooth rollers 305 are symmetrically installed at the connection point of the two arc-shaped grooves. A motor for driving the baking rack 3 to rotate and a fan for providing airflow into the annular air cavity of the base 4 are fixedly installed on the base 4. An annular air cavity is defined in one end wall of the base 4, and an electric heating wire 404 is provided in the annular air cavity. The base 4 also includes a switching component 5 installed on the outside of the baking shell 1, a hot air component 6 installed between the baking shell 1 and the base 4, and a heating component 7 installed on the baking rack 3.

[0045] like Figure 3 As shown, the switching assembly 5 includes a ball cover 501, a holder 502 and a limit pin 503. The ball cover 501 is concentrically rotatably sleeved on the outer end of the baking shell 1. The ball cover 501 is provided with a plurality of notches for ventilation in an annular array and a circular opening with teeth on the top. When the ball cover 501 does not block the ventilation holes on the baking shell 1, it can meet the needs of direct fire baking. By rotating the ball cover 501 to block part of the ventilation holes, it can meet the needs of semi-hot air baking and hot air baking, thereby achieving the conditions for switching the baking modes. The holder 502 is fixedly sleeved on the shaft tube 103. Two horizontal guide grooves are provided on both sides of the holder 502. The limit pin 503 is provided with two guide columns that are slidably adapted to the guide grooves on both sides. The two limit pins 503 are movably inserted between them. Two plug-in rods 504 are equipped with limit plates at both ends of the plug-in rods 504. A first spring 505 is sleeved on a section of the plug-in rod 504 between the two limit pins 503. The limit pins 503 are clamped in the teeth of the top opening of the ball cover 501 by the elastic force of the first spring 505. The two limit pins 503 are pinched and the two limit pins 503 are moved closer to each other and disengaged from the teeth at the top of the ball cover 501 under the sliding guidance of the guide groove and the guide column, so that the ball cover 501 can be rotated and adjusted. After the adjustment is complete, the limit pins 503 are released, and the two limit pins 503 are bounced open and clamped into the teeth at the top of the ball cover 501 under the elastic action of the first spring 505 to form an engagement, ensuring that the ball cover 501 does not rotate when the baking shell 1 rotates.

[0046] like Figure 4 and Figure 8As shown, the hot air assembly 6 includes a swirl disk 601 and a sealing cover 602. The bottom of the swirl disk 601 is arranged closely to the filter 101, and a connecting pipe 603 is rotatably installed on the top of the swirl disk 601. The sealing cover 602 is rotatably installed on the annular air cavity on the base 4 and the sealing cover 602 is fixedly connected to the connecting pipe 603. The swirl disk 601 is fixedly installed with a plurality of stirring bars 604 in an annular array. The stirring bars 604 are composed of arc segments and horizontal segments. The arc segments of the stirring bars 604 are arranged concentrically with the baking shell 1, and the straight segments of the stirring bars 604 are arranged closely to the filter 101. The hot air in the annular air cavity enters the swirl disk 601 through the connecting pipe 603, is blown out through an air duct tangential to the outer circle of the swirl disk 601, and drives the swirl disk 601 to rotate. On the one hand, the uniformity of hot air diffusion is improved. On the other hand, the rotation of the swirl disk 601 drives the stirring bars 604 to rotate, which can drive the coffee beans to stir while also scraping the filter 101.

[0047] like Figure 5 and Figure 7 The two curved plates 701 rotate in opposite directions at the same speed through the meshing action of the teeth and the gear roller 305. The top of one of the curved plates 701 is provided with a rotating seat 703. The two curved plates 701 and the inner arc surface of the baking rack 3 are each provided with two infrared heating plates. The rotating rotating seat 703 drives one curved plate 701 to rotate, and drives the other curved plate 701 to rotate in the opposite direction through the meshing action with the gear roller 305, so that the two curved plates 701 are unfolded into an "X" shape, and cooperate with the curved plates 701 and the infrared heating plates inside the baking rack 3 to achieve the purpose of multi-angle uniform heating, thereby improving the uniformity of direct fire baking and semi-hot air baking. When the locking cam 705 is unlocked, the locking cam 705 is unlocked, and the locking cam 705 is unlocked, so that the locking cam 705 can be unlocked.

[0048] like Figure 5 、 Figure 6 and Figure 8 As shown, a driven bevel gear 104 is fixedly mounted on the shaft tube 103, a shaft seat 301 is fixedly welded on the baking rack 3, and a connecting shaft 302 for driving the baking shell 1 to rotate is rotatably mounted in the shaft seat 301, one end of the connecting shaft 302 is fixedly mounted with a driving bevel gear 303 meshing with the driven bevel gear 104, and the other end of the connecting shaft 302 is fixedly mounted with a driven gear 304, and a fixed ring gear 402 meshing with the driven gear 304 is fixedly mounted on the base 4, wherein the motor drives the baking rack 3 to rotate, and the rotation of the baking rack 3 drives the baking shell 1 to revolve around a horizontal axis. While the baking rack 3 rotates, the driven gear 304 meshes with the fixed ring gear 402 and drives the connecting shaft 302 to rotate. The rotation of the connecting shaft 302 drives the baking shell 1 to rotate around a vertical axis through the meshing action of the driving bevel gear 303 and the driven bevel gear 104. The revolution and rotation are used to make the coffee beans roll in all directions during the roasting process, thereby improving the uniformity of the coffee beans roasting.

[0049] like Figure 9 As shown, the base 4 is provided with an air inlet 401 tangent to the wind cavity, and a clamping ring 403 is fixedly installed in a circular array in the wind cavity of the base 4. The heating wire 404 is in a spiral ring shape and is arranged in the clamping ring 403. The clamping ring 403 is provided with a plurality of hooks 405 in a circular array for reinforcing the clamping of the heating wire 404. The fan pressurizes and supplies air to the annular wind cavity of the base 4 through the air inlet 401. Since the air inlet 401 is tangent to the wind cavity, the airflow enters the wind cavity and circulates in a circular manner. The hot airflow is heated by the heating wire 404 to form hot air, and the spiral ring shape of the heating wire 404 effectively improves the heating efficiency.

[0050] A coffee bean roasting process comprises the following steps:

[0051] S1. Add coffee beans with the roasting shell 1 opening facing upwards, and install the filter 101 and the waste shell 2;

[0052] S2. Select direct flame roasting, semi-hot air roasting, or hot air roasting according to the coffee bean type and requirements and start the equipment;

[0053] S3. After baking, open the waste shell 2 upwards and unscrew the plug 201 to drive the waste shell 2 to shake through the cleaning port at the bottom to clean the silver scraps.

[0054] S4. After the waste is cleaned, the roasting shell 1 is opened upward, the waste shell 2 and the filter 101 are removed, and the roasted coffee beans are collected.

[0055] The specific working principle is that before roasting, the roasting shell 1 is opened upward and coffee beans are added. The filter 101 and the waste shell 2 are installed. The roasting rack 3 is driven to rotate so that the opening of the roasting shell 1 is vertically downward. After the preparation is completed, the roasting mode is selected. The ball cover 501 is rotated to cover different numbers of vents. Specifically, the two limit pins 503 are pinched. Under the sliding guidance of the guide groove and the guide column, the two limit pins 503 are moved closer to each other and disengaged from the teeth on the top of the ball cover 501, so that the ball cover 501 can be rotated and adjusted. After the adjustment is complete, the limit pins 503 are released. Under the elastic action of the first spring 505, the two limit pins 503 are ejected and engaged with the teeth on the top of the ball cover 501, ensuring that the ball cover 501 does not rotate when the roasting shell 1 rotates;

[0056] In direct-fire roasting mode, the dome 501 does not block the exhaust holes on the roasting shell 1, and the fan and heating wire are not running. Infrared radiation is emitted by the infrared heating plates on the curved plate 701 and the roasting rack 3, and enters the roasting shell 1 through the exhaust holes to roast the coffee beans.

[0057] When the semi-hot air roasting mode is selected, the ball cover 501 blocks some of the vents and the fan is running, while the heating wire is not running. Infrared radiation is emitted through the infrared heating plate on the curved plate 701 and the roasting rack 3. The radiation enters the roasting shell 1 through the exhaust hole to roast the coffee beans. Both direct fire roasting and semi-hot air roasting require heating by the heating component 7. Specifically, the rotating seat 703 drives one curved plate 701 to rotate, and drives the other curved plate 701 to rotate in the opposite direction through the meshing action with the tooth roller 305, so that the two curved plates 701 are unfolded into an "X" shape, and the curved plates 701 and the infrared heating plates inside the roasting rack 3 are coordinated to form a "X" shape. The external heating plate achieves the purpose of multi-angle uniform heating, improving the uniformity of direct fire baking and semi-hot air baking. When returning to the original position, the limiting seat 702 is lifted upward to compress the second spring 706 so that the protrusion 705 is disengaged from the plug-in hole on the baking rack 3, and the curved plate 701 can be rotated. After the two curved plates 701 are unfolded, the limiting seat 702 is released and the elastic action of the second spring 706 is used to plug the protrusion 705 into the other pair of holes to form a rotation limit. If the two curved plates 701 need to be returned to their original position, it is only necessary to lift the limiting seat 702 and rotate it in the opposite direction by a small angle, and the elastic action of the torsion spring 704 is used to drive the two curved plates 701 to return to their original position automatically.

[0058] When the hot air baking mode is selected, the ball cover 501 blocks some of the air vents and does not bake through the infrared heating plate. Instead, the fan provides hot air baking. Specifically, the fan pressurizes and sends air to the annular air cavity of the base 4 through the air inlet 401. Since the air inlet 401 is tangential to the air cavity, the airflow enters the air cavity and circulates in a circular manner. The hot airflow is heated by the electric heating wire 404 to form hot air. The hot air in the annular air cavity enters the swirl disk 601 through the connecting pipe 603 and is blown out through the air duct tangential to the outer circle of the swirl disk 601, driving the swirl disk 601 to rotate. On the one hand, the uniformity of hot air diffusion is improved. On the other hand, the rotation of the swirl disk 601 drives the stirring bar 604 to rotate, which can drive the coffee beans to be stirred while also scraping the filter 101.

[0059] During the roasting process, the motor drives the roasting rack 3 to rotate, which in turn drives the roasting shell 1 to orbit around its horizontal axis. Simultaneously, the roasting rack 3 rotates, and the driven gear 304, meshing with the fixed ring gear 402, drives the connecting shaft 302 to rotate. The rotation of the connecting shaft 302, through the meshing of the active bevel gear 303 and the driven bevel gear 104, drives the roasting shell 1 to rotate around its vertical axis. This combination of orbital and rotation causes the coffee beans to tumble in all directions during the roasting process, thereby improving the evenness of the roasted coffee beans.

[0060] After roasting is completed, the waste shell 2 is opened upward, and the plugging head 201 is unscrewed to drive the waste shell 2 to shake through the cleaning port at the bottom to clean the silver skin waste. After the waste cleaning is completed, the roasting shell 1 is opened upward, the waste shell 2 and the filter 101 are removed, and the roasted coffee beans are collected.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any person skilled in the art may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A coffee bean roasting device, comprising a roasting shell (1), a waste shell (2), a roasting rack (3) and a base (4), characterized in that: The baking shell (1) and the waste shell (2) are both hemispherical shells and are formed into a complete spherical shell shape by threaded installation. The baking shell (1) is provided with two rows of exhaust holes in an annular array. A filter (101) is provided at the connection between the baking shell (1) and the waste shell (2). A shaft tube (103) is fixedly installed at the center of the top of the baking shell (1). A cleaning hole is provided at the center of the bottom of the waste shell (2), and a plug (201) is threadedly installed in the cleaning hole. The baking rack (3) is in a semi-circular arc shape, and the baking shell (1) is coaxially rotatably installed on the baking rack (3) through the shaft tube (103). Two connected arc grooves are provided in the baking rack (3), and two tooth rollers (305) are symmetrically installed at the connection point of the two arc grooves. An annular air cavity is provided in one end wall of the base (4), and a heating wire (404) is provided in the annular air cavity. The baking rack (3) further comprises: a switching assembly (5) mounted on the outside of the baking shell (1); a hot air assembly (6) installed between the baking shell (1) and the base (4); A heating component (7) is installed on the baking rack (3).

2. The coffee bean roasting device according to claim 1, characterized in that: A driven bevel gear (104) is fixedly mounted on the shaft tube (103); a shaft seat (301) is fixedly welded on the baking rack (3); and a connecting shaft (302) for driving the baking shell (1) to rotate is rotatably mounted in the shaft seat (301); a driving bevel gear (303) meshingly connected to the driven bevel gear (104) is fixedly mounted on one end of the connecting shaft (302); a driven gear (304) is fixedly mounted on the other end of the connecting shaft (302); and a fixed gear ring (402) meshingly connected to the driven gear (304) is fixedly mounted on the base (4).

3. The coffee bean roasting device according to claim 1, characterized in that: The base (4) is provided with an air inlet (401) tangential to the air cavity, a clamping ring (403) is fixedly installed in a circular array in the air cavity of the base (4), the heating wire (404) is in a spiral ring shape and is arranged in the clamping ring (403), and the clamping ring (403) is provided with a plurality of hooks (405) in a circular array for clamping the heating wire (404).

4. The coffee bean roasting device according to claim 1, characterized in that: The switching assembly (5) comprises a ball cover (501), a holder (502) and a limit pin (503); the ball cover (501) is coaxially rotatably sleeved on the outer end of the baking shell (1); the ball cover (501) is provided with a plurality of notches for ventilation in an annular array and a circular opening with teeth is provided on the top.

5. The coffee bean roasting device according to claim 4, characterized in that: The clamping seat (502) is fixedly mounted on the shaft tube (103), and two horizontal guide grooves are provided on both sides of the clamping seat (502). The limiting pin (503) is provided with two guide columns on both sides that are slidably adapted to the guide grooves. Two plug-in rods (504) are movably inserted between the two limiting pins (503), and limiting plates are provided at both ends of the plug-in rods (504). A first spring (505) is provided on a section of the plug-in rod (504) located between the two limiting pins (503). The limiting pin (503) is clamped in the teeth of the top opening of the ball cover (501) by the elastic force of the first spring (505).

6. The coffee bean roasting device according to claim 1, characterized in that: The hot air assembly (6) comprises a swirl disk (601) and a sealing cover plate (602); the bottom of the swirl disk (601) is arranged in close contact with the filter screen (101); a connecting pipe (603) is rotatably mounted on the top of the swirl disk (601); the sealing cover plate (602) is rotatably mounted on the annular air cavity on the base (4); and the sealing cover plate (602) and the connecting pipe (603) are fixedly connected.

7. The coffee bean roasting device according to claim 6, characterized in that: The swirl disk (601) is fixedly mounted with a plurality of stirring bars (604) in a circular array. The stirring bars (604) are composed of arc segments and horizontal segments. The arc segments of the stirring bars (604) are arranged concentrically with the baking shell (1), and the straight segments of the stirring bars (604) are arranged in close contact with the filter screen (101).

8. The coffee bean roasting device according to claim 1, characterized in that: The heating assembly (7) comprises an arc-shaped plate (701) and a limiting seat (702); the arc-shaped plates (701) are provided with two and are respectively rotatably mounted in two arc-shaped grooves of the baking rack (3); the two arc-shaped plates (701) are both provided with teeth meshing with the toothed roller (305); the meshing action of the teeth with the toothed roller (305) causes the two arc-shaped plates (701) to rotate in opposite directions at the same speed; a rotating seat (703) is provided on the top of one of the arc-shaped plates (701); and two infrared heating plates are provided on the inner arc surface of the two arc-shaped plates (701) and the baking rack (3).

9. The coffee bean roasting device according to claim 8, characterized in that: A torsion spring (704) is installed between the rotating seat (703) and the baking rack (3); two bosses (705) are provided at the bottom of the limiting seat (702); and holes corresponding to the exhaust holes are provided on the top of the baking rack (3) and are plugged into and adapted to the bosses (705); the limiting seat (702) is movably plugged into the rotating seat (703) through the two bosses (705); a limiting piece is provided on the boss (705), and a second spring (706) is provided between the limiting piece and the rotating seat (703).

10. A coffee bean roasting process, based on the roasting equipment according to any one of claims 1 to 9, characterized in that: The specific steps include: S1. Add coffee beans when the roasting shell (1) is opened upward, and install the filter (101) and the waste shell (2); S2. Select direct flame roasting, semi-hot air roasting, or hot air roasting according to the coffee bean type and requirements and start the equipment; S3. After baking, the waste shell (2) is opened upward, and the plugging head is unscrewed to drive the waste shell (2) to shake through the cleaning port at the bottom to clean the silver scraps. S4. After the waste is cleaned, the roasting shell (1) is opened upward, the waste shell (2) and the filter (101) are removed, and the roasted coffee beans are collected.

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