Coffee bean roasting facilities and coffee roasting machines

Abstract

This disclosure provides a coffee bean roasting mechanism and a coffee roaster. The coffee bean roasting mechanism includes a housing, a roasting assembly, a flue, and a turbine assembly. The roasting assembly is disposed inside the housing and is used to roast coffee beans. The turbine assembly is mounted on the housing, and its exhaust end is connected to the exhaust area of ​​the roasting assembly via the flue. An exhaust port is provided on the side wall of the housing, and the exhaust end of the turbine assembly is connected to the exhaust port. When the exhaust end of the turbine assembly draws hot air from the exhaust area of ​​the roasting assembly, the hot air flows through the exhaust end to the exhaust end, and then through the exhaust end to the exhaust port, allowing the hot air to be discharged outside the housing. When the hot air is drawn outside the housing by the turbine assembly, the temperature of the roasting assembly is further reduced, preventing the roasting assembly from easily catching fire.

Description

Technical Field

[0001] This disclosure relates to the technical field of coffee bean roasters, and in particular to a coffee bean roasting mechanism and a coffee roaster. Background Technology

[0002] Currently, with the continuous improvement of coffee culture, coffee bean roasting machines have emerged on the market. In the coffee roasting process, precise control of the roasting temperature plays a decisive role in the final flavor and quality of the coffee. A reasonable temperature profile can fully stimulate the aroma substances and flavor components within the coffee beans, while improper temperature control can lead to under-roasting or over-roasting, severely affecting the taste.

[0003] Existing coffee roasters often operate at excessively high roasting temperatures, making them prone to internal fires. For example, Chinese patent document CN211657355U discloses a coffee bean roasting device that uses quenching water and emergency water pipes to extinguish fires inside the roaster. While this effectively extinguishes fires, it renders the coffee beans unusable, and the roaster itself cannot be immediately put back into use after the fire is extinguished.

[0004] However, the baking machines mentioned above cannot avoid the problem of being prone to catching fire. Utility Model Content

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a coffee bean roasting mechanism and coffee roaster that can avoid the problem of easy ignition.

[0006] The purpose of this disclosure is achieved through the following technical solution:

[0007] A coffee bean roasting mechanism includes a housing and a roasting assembly; the roasting assembly is disposed inside the housing and is used to roast coffee beans;

[0008] The coffee roasting mechanism also includes a flue and a turbine assembly; the turbine assembly is mounted on the housing, and the exhaust end of the turbine assembly is connected to the air outlet area of ​​the roasting assembly through the flue; an exhaust port is provided on the side wall of the housing, and the exhaust end of the turbine assembly is connected to the exhaust port.

[0009] In one embodiment, the housing includes a shell and a mounting bracket. The shell has a mounting cavity, and the mounting bracket is located inside the mounting cavity and fixedly connected to the shell to divide the shell into a first mounting cavity and a second mounting cavity. The mounting bracket has a first through hole, through which the first mounting cavity is connected to the second mounting cavity. The flue passes through the first through hole and is connected to the air outlet area of ​​the bean roasting assembly.

[0010] In one embodiment, the turbine assembly includes a first fixed frame, a second fixed frame, and a turbine fan. The first fixed frame and the second fixed frame are both disposed on the inner peripheral wall of the second mounting cavity. The first fixed frame and the second fixed frame are disposed opposite to each other. A first side of the turbine fan is connected to the first fixed frame, and a second side of the turbine fan is connected to the second fixed frame.

[0011] In one embodiment, the second mounting bracket has a protruding mounting portion, the mounting portion having an air passage hole, and the exhaust end of the turbine assembly is connected to the air passage hole.

[0012] In one embodiment, the flue is tightly connected to the mounting bracket.

[0013] In one embodiment, the roasting assembly includes a drive motor and a roasting drum. The air outlet area of ​​the roasting assembly is located on the side wall of the roasting drum near the smoke pipe. The mounting bracket has a second through hole. The drive motor is located in the second mounting cavity. The second through hole connects the first mounting cavity and the second mounting cavity. The roasting drum is located in the first mounting cavity. The rotation shaft of the drive motor is connected to the roasting drum through the second through hole.

[0014] In one embodiment, the roasting assembly includes a first heating tube and a second heating tube, which are disposed within the first mounting cavity; the first heating tube is disposed on a first side of the roasting drum, and the second heating tube is disposed on a second side of the roasting drum.

[0015] In one embodiment, the coffee bean roasting mechanism further includes a heat-insulating sponge pad, which is disposed on the side of the fixing frame away from the turbine fan. The heat-insulating sponge pad has a first clearance hole and a second clearance hole. The smoke pipe is connected to the air outlet area of ​​the roasting drum through the first through hole and the first clearance hole. The rotating shaft of the drive motor is connected to the roasting drum through the second through hole and the second clearance hole.

[0016] In one embodiment, the coffee bean roasting mechanism further includes a temperature sensor disposed inside the roasting drum and electrically connected to the turbine fan.

[0017] A coffee roaster includes the coffee bean roasting mechanism described in any of the above embodiments.

[0018] Compared with the prior art, this disclosure has at least the following advantages:

[0019] The roasting assembly is housed within the machine casing and is used to roast undried coffee beans. A turbine assembly is mounted on the casing, with its exhaust end connected to the exhaust area of ​​the roasting assembly via a flue. This allows the turbine to draw hot air from the roasting assembly through the flue. Simultaneously, an exhaust vent is located on the side wall of the casing, connected to the exhaust end of the turbine assembly. When the turbine's exhaust end draws hot air from the roasting assembly's exhaust area, the hot air flows through the exhaust end to the exhaust vent, and then through the exhaust vent to be expelled outside the casing. As the hot air is drawn outside the casing by the turbine assembly, the temperature of the roasting assembly is further reduced, preventing the roasting assembly from easily catching fire. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of a coffee bean roasting mechanism according to an embodiment of the present disclosure;

[0022] Figure 2 This is a cross-sectional view of a coffee bean roasting mechanism according to an embodiment of the present disclosure;

[0023] Figure 3 This is a schematic diagram of the structure of a coffee bean roasting mechanism according to an embodiment of the present disclosure;

[0024] Figure 4 This is a schematic diagram of the structure of a coffee bean roasting mechanism according to an embodiment of the present disclosure.

[0025] Reference numerals: 10, Coffee bean roasting mechanism; 100, Machine casing; 110, Housing; 1110, First mounting cavity; 1120, Second mounting cavity; 1130, Exhaust vent; 120, Fixing bracket; 1210, First through hole; 1220, Second through hole; 200, Roasting bean assembly; 210, Drive motor; 220, Roasting drum; 2210, Air outlet area; 230, First heating element; 240, Second heating element; 300, Flue; 400, Turbine assembly; 410, First fixing bracket; 420, Second fixing bracket; 4210, Fixing part; 4211, Air vent; 430, Turbine fan; 4310, Exhaust end; 4320, Exhaust end; 500, Heat insulation sponge pad; 510, First clearance hole; 520, Second clearance hole; 600, Temperature sensor. Detailed Implementation

[0026] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0030] like Figures 1 to 4 As shown, a coffee bean roasting mechanism 10 according to one embodiment includes a housing 100, a roasting assembly 200, a smoke tube 300, and a turbine assembly 400; the roasting assembly 200 is disposed inside the housing 100 and is used to roast coffee beans;

[0031] The turbine assembly 400 is mounted on the housing 100, and the exhaust end 4320 of the turbine assembly 400 is connected to the air outlet area 2210 of the roasting bean assembly 200 through the smoke pipe 300; an exhaust port 1130 is provided on the side wall of the housing 100, and the exhaust end 4310 of the turbine assembly 400 is connected to the exhaust port 1130.

[0032] In this embodiment, a roasting assembly 200 is disposed inside the housing 100. The roasting assembly 200 is used to roast undried coffee beans. Simultaneously, a turbine assembly 400 is mounted on the housing 100, and the exhaust end 4320 of the turbine assembly 400 is connected to the exhaust area 2210 of the roasting assembly 200 via a flue 300. This allows the exhaust end 4320 of the turbine assembly 400 to dissipate heat from the roasting assembly 200 through the flue 300. Air is drawn in; simultaneously, an exhaust vent 1130 is provided on the side wall of the housing 100, and the exhaust end 4310 of the turbine assembly 400 is connected to the exhaust vent 1130. When the exhaust end 4320 of the turbine assembly 400 draws hot air from the air outlet area 2210 of the baking assembly, the hot air flows through the exhaust end 4320 to the exhaust end 4310, and then through the exhaust end 4310 to the exhaust vent 1130, so that the hot air is discharged to the outside of the housing 100. When the hot air is drawn to the outside of the housing 100 by the turbine assembly 400, the temperature of the baking assembly will be further reduced, avoiding the problem of the baking assembly being prone to catching fire.

[0033] Furthermore, in this embodiment, when the temperature reaches a predetermined value, the turbine assembly 400 will start working, causing its flue pipe 300 to form a negative pressure state. This allows the exhaust end 4320 of the turbine assembly 400 to draw hot air from the baking assembly through the flue pipe 300. The hot air then flows through the exhaust end 4310 to the exhaust port 1130, allowing it to flow out of the casing 100. This further reduces the temperature of the hot air inside the baking assembly, thus preventing the baking assembly from catching fire due to excessive temperature.

[0034] like Figure 2As shown, in one embodiment, the housing 100 includes a housing 110 and a mounting bracket 120. The housing 110 forms a mounting cavity, and the mounting bracket 120 is located in the mounting cavity and fixedly connected to the housing 110 to divide the housing 110 into a first mounting cavity 1110 and a second mounting cavity 1120. The mounting bracket 120 has a first through hole 1210, and the first mounting cavity 1110 is connected to the second mounting cavity 1120 through the through hole. The flue 300 passes through the first through hole 1210 and is connected to the air outlet area 2210 of the bean roasting assembly 200. It is understood that the housing 100 includes a shell 110 and a mounting bracket 120. The shell 110 has a mounting cavity, and the mounting bracket 120 is connected to the mounting cavity of the shell 110 by welding, thereby dividing the shell 110 into a first mounting cavity 1110 and a second mounting cavity 1120. The mounting bracket 120 also has a first through hole 1210, through which the flue 300 passes and communicates with the air outlet area 2210 of the roasting assembly 200. By dividing the mounting bracket 120 into the first mounting cavity 1110 and the second mounting cavity 1120, the turbine assembly 400 is separated from the roasting assembly, thereby protecting the turbine assembly 400 from damage to its structure due to excessive heat from the roasting assembly.

[0035] See Figure 2 and Figure 3Furthermore, the turbine assembly 400 includes a first fixing frame 410, a second fixing frame 420, and a turbine fan 430. Both the first fixing frame 410 and the second fixing frame 420 are disposed on the inner peripheral wall of the second mounting cavity 1120, with the first fixing frame 410 and the second fixing frame 420 arranged opposite to each other. The first side of the turbine fan 430 is connected to the first fixing frame 410, and the second side of the turbine fan 430 is connected to the turbine fixing frame 120. It can be understood that the first fixing frame 410 and the second fixing frame 420, arranged opposite to each other on the inner peripheral wall of the second mounting cavity 1120, form a stable frame, providing a solid foundation for the turbine fan 430. The symmetrical connection method, where the first side of the turbine fan 430 is connected to the first fixing frame 410 and the second side is connected to the second fixing frame 420, not only ensures the stability of the turbine fan 430 installation but also allows it to maintain balance during operation, reducing noise and wear caused by vibration. As coffee beans are roasted in the roasting assembly 200, the heating element continuously heats up, causing the air inside the roasting assembly 200 to expand. At this time, the turbine fan 430 starts, and its powerful suction creates a negative pressure environment. Under the action of negative pressure, the hot air in the exhaust area 2210 of the roasting assembly 200 flows rapidly along the ventilation duct of the flue 300 to the air inlet of the turbine fan 430. Due to the high-speed rotation of the turbine fan 430 blades, the inhaled hot air is continuously pressurized and accelerated through the air inlet, the second mounting cavity 1120, and finally discharged from the exhaust port 1130 of the casing 100. During this process, the efficient operation of the turbine fan 430 ensures that the air inside the roasting assembly 200 is refreshed in a timely manner. This not only effectively controls the internal temperature of the roasting assembly 200, avoiding local overheating that could lead to uneven roasting or scorching of the coffee beans, but also quickly removes the smoke generated during the roasting process.

[0036] See Figure 2 and Figure 3 In one embodiment, the second mounting bracket 420 has a protruding mounting portion 4210, which has an air passage 4211. The exhaust end 4320 of the turbine assembly 400 is connected to the air passage 4211. It can be understood that the protruding mounting portion 4210 and the air passage 4211 of the second mounting bracket 420 constitute a key connection hub in the ventilation system. The presence of the mounting portion 4210 further strengthens the connection stability between the turbine fan 430 and the second mounting bracket 420. When the turbine fan 430 operates at high speed, it can effectively disperse the force generated by the fan, preventing the second mounting bracket 420 from loosening or deforming due to uneven force distribution, thus laying a solid foundation for the stable operation of the entire turbine assembly 400. Furthermore, hot air flows from the flue 300 to the air passage 4211, and then from the air passage 4211 to the exhaust end 4320 of the turbine assembly 400.

[0037] like Figure 2 As shown, in one embodiment, the flue 300 is tightly connected to the mounting bracket 120. It can be understood that the flue 300 passes through the first through hole 1210, and the outer peripheral wall of the flue 300 is welded to the mounting bracket 120, thus ensuring the flue 300 is securely installed in the first through hole 1210. In terms of sealing, the tight connection creates a nearly closed channel for the entire ventilation system. When the turbine fan 430 starts and generates negative pressure, all the hot air from the outlet area 2210 of the roasting assembly 200 can flow through the flue 300 to the turbine assembly 400, reducing heat loss during transmission, improving the exhaust efficiency of the turbine assembly 400, and thus more precisely controlling the temperature inside the roasting assembly 200. In terms of stability, the mounting bracket 120 provides reliable support for the flue 300, preventing deformation of the internal ventilation duct due to suspension or shaking.

[0038] Combination Figure 2 and Figure 3 As shown, in one embodiment, the roasting assembly 200 includes a drive motor 210 and a roasting drum 220. The air outlet area 2210 of the roasting assembly is disposed on the side wall of the roasting drum 220 near the smoke pipe 300. The fixing frame 120 has a second through hole 1220. The drive motor 210 is disposed in the second mounting cavity 1120. The second through hole 1220 connects the first mounting cavity 1110 and the second mounting cavity 1120. The roasting drum 220 is disposed in the first mounting cavity 1110. The rotation shaft of the drive motor 210 is connected to the roasting drum 220 through the second through hole 1220. It is understood that the drive motor 210 is set in the second mounting cavity 1120, the drive motor 210 is fixedly mounted on the partition, and a second through hole 1220 is provided on the partition. The rotating shaft of the drive motor 210 passes through the through hole and is connected to the roasting drum 220, so that when the drive motor 210 is started, it is connected to the roasting drum 220 through the rotating shaft of the drive motor 210, which further drives the roasting drum 220 to rotate, thereby causing the coffee beans in the roasting drum 220 to turn.

[0039] It should be noted that the drive motor 210 can be either a stepper motor or a servo motor.

[0040] See Figure 2 , Figure 3 and Figure 4In one embodiment, the roasting assembly 200 includes a first heating tube 230 and a second heating tube 240, which are disposed within the first mounting cavity 1110. The first heating tube 230 is disposed on a first side of the roasting drum 220, and the second heating tube 240 is disposed on a second side of the roasting drum 220. It can be understood that the design of the first heating tube 230, the second heating tube 240, and the second mounting cavity 1120 of the roasting drum 220, with the first heating tube 230 and the second heating tube 240 respectively positioned on both sides of the roasting drum 220, forms a symmetrical three-dimensional heating structure. This layout allows the roasting drum 220 to receive heat radiation evenly, avoiding the problem of uneven heating of the coffee bean surface caused by traditional single-sided heating. During the roasting process, as the coffee beans tumble inside the drum, the heating tubes on both sides can continuously transfer heat from different angles, ensuring that each coffee bean undergoes a similar heat conduction process, thereby achieving a more uniform roasting effect and reducing undercooked or locally scorched beans.

[0041] like Figure 2 As shown, in one embodiment, the coffee bean roasting mechanism 10 further includes a heat-insulating sponge pad 500, which is disposed on the side of the fixing frame 120 away from the turbine fan 430. The heat-insulating sponge pad 500 has a first clearance hole 510 and a second clearance hole 520. The smoke pipe 300 is connected to the air outlet area 2210 of the roasting drum 220 through the first through hole 1210 and the first clearance hole 510. The rotating shaft of the drive motor 210 is connected to the roasting drum 220 through the second through hole 1220 and the second clearance hole 520. It is understandable that a heat-insulating sponge pad 500 is provided on the side of the partition away from the turbine fan 430, and the heat-insulating sponge pad 500 has a first clearance hole 510 and a second clearance hole 520, so that the smoke pipe 300 is connected to the air outlet area 2210 of the baking drum 220 through the first through hole 1210 and the first clearance hole 510; the rotating shaft of the drive motor 210 is connected to the baking assembly through the second through hole 1220 and the second clearance hole 520; the heat-insulating sponge pad 500 is made of a special high-temperature resistant material. During the baking process, the high temperature generated by the heating assembly will form a high-temperature area around the roasting bean assembly 200, and the heat will diffuse to the fixing frame 120 and the second mounting cavity 1120 where the turbine assembly 400 is located through heat conduction. The heat-insulating sponge pad 500 can effectively block this heat transfer path, significantly reducing the heat transfer efficiency from the fixed frame 120 to components such as the turbine fan 430, and isolating temperature-sensitive components such as the turbine fan 430 from the high-temperature environment, avoiding problems such as motor performance degradation and accelerated component aging caused by overheating, thereby extending the overall service life of the equipment.

[0042] like Figure 2As shown, in one embodiment, the coffee bean roasting mechanism 10 further includes a temperature sensor 600, which is disposed inside the roasting drum 220 and electrically connected to the turbine fan 430. It can be understood that since the temperature sensor 600 is disposed inside the roasting drum 220 and electrically connected to the turbine fan 430, when the temperature sensor 600 senses that the temperature inside the roasting drum 220 is too high, the turbine fan 430 will increase its power, causing the turbine fan 430 to exhaust the heat from the roasting drum 220 through the flue 300 to the outside of the housing 100, thereby reducing the temperature of the roasting drum 220.

[0043] It should be noted that the temperature sensor 600 can be either an NTC temperature sensor 600 or a thermocouple sensor, which is existing technology and will not be described in detail here.

[0044] This application also includes a coffee roaster, comprising the coffee bean roasting mechanism 10 described in any of the above embodiments. It is understood that when the temperature reaches a predetermined value, the turbine assembly 400 will start working, creating a negative pressure state in its flue 300. This allows the exhaust end 4320 of the turbine assembly 400 to draw hot air from the roasting assembly through the flue 300. The hot air then flows through the exhaust end 4310 to the exhaust port 1130, allowing it to exit the casing 100. This further reduces the temperature of the hot air inside the roasting assembly, preventing the roasting assembly from catching fire due to excessive temperature.

[0045] Compared with the prior art, this disclosure has at least the following advantages:

[0046] A roasting assembly 200 is installed inside the housing 100. The roasting assembly 200 is used to roast undried coffee beans. Meanwhile, a turbine assembly 400 is installed on the housing 100, and the exhaust end 4320 of the turbine assembly 400 is connected to the exhaust area 2210 of the roasting assembly 200 through a flue 300. This allows the exhaust end 4320 of the turbine assembly 400 to extract hot air from the roasting assembly 200 through the flue 300. At the same time, an exhaust port 1130 is provided on the side wall of the housing 100, and the exhaust end 4310 of the turbine assembly 400 is connected to the exhaust port 1130. When the exhaust end 4320 of the turbine assembly 400 extracts hot air from the exhaust area 2210 of the roasting assembly, the hot air flows through the exhaust end 4320 to the exhaust end 4310, and then through the exhaust end 4310 to the exhaust port 1130, so that the hot air is discharged to the outside of the housing 100. When hot air is drawn to the outside of the housing 100 by the turbine assembly 400, the temperature of the baking assembly will be further reduced, thus avoiding the problem of the baking assembly being prone to catching fire.

[0047] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A coffee bean roasting mechanism, comprising a housing and a roasting assembly; the roasting assembly is disposed within the housing and is used to roast coffee beans; characterized in that The coffee bean roasting mechanism also includes a flue and a turbine assembly; the turbine assembly is mounted on the housing, and the exhaust end of the turbine assembly is connected to the exhaust area of ​​the roasting assembly through the flue; an exhaust port is provided on the side wall of the housing, and the exhaust end of the turbine assembly is connected to the exhaust port.

2. The coffee bean roasting mechanism of claim 1, wherein, The housing includes a shell and a mounting frame. The shell has a mounting cavity, and the mounting frame is located inside the mounting cavity and fixedly connected to the shell to divide the shell into a first mounting cavity and a second mounting cavity. The mounting frame has a first through hole, through which the first mounting cavity is connected to the second mounting cavity. The smoke pipe passes through the first through hole and is connected to the air outlet area of ​​the bean roasting assembly.

3. The coffee bean roasting mechanism of claim 2, wherein, The turbine assembly includes a first fixed frame, a second fixed frame, and a turbine fan. The first fixed frame and the second fixed frame are both disposed on the inner peripheral wall of the second mounting cavity. The first fixed frame and the second fixed frame are disposed opposite to each other. The first side of the turbine fan is connected to the first fixed frame, and the second side of the turbine fan is connected to the second fixed frame.

4. The coffee bean roasting mechanism of claim 3, wherein, The second fixing bracket has a fixing part protruding from it, and the fixing part has an air passage hole. The exhaust end of the turbine assembly is connected to the air passage hole.

5. The coffee bean roasting mechanism of claim 2, wherein, The smoke pipe is tightly connected to the fixing frame.

6. The coffee bean roasting mechanism of claim 3, wherein, The roasting assembly includes a drive motor and a roasting drum. The air outlet of the roasting assembly is located on the side wall of the roasting drum near the smoke pipe. The mounting bracket has a second through hole. The drive motor is located in the second mounting cavity. The second through hole connects the first mounting cavity and the second mounting cavity. The roasting drum is located in the first mounting cavity. The rotating shaft of the drive motor is connected to the roasting drum through the second through hole.

7. The coffee bean roasting mechanism according to claim 6, characterized in that, The roasting assembly includes a first heating tube and a second heating tube, which are disposed within the first mounting cavity; the first heating tube is disposed on a first side of the roasting drum, and the second heating tube is disposed on a second side of the roasting drum.

8. The coffee bean roasting mechanism of claim 7, wherein, The coffee bean roasting mechanism also includes a heat-insulating sponge pad, which is disposed on the side of the fixing frame away from the turbine fan. The heat-insulating sponge pad has a first clearance hole and a second clearance hole. The smoke pipe is connected to the air outlet area of ​​the roasting drum through the first through hole and the first clearance hole. The rotating shaft of the drive motor is connected to the roasting drum through the second through hole and the second clearance hole.

9. The coffee bean roasting mechanism of claim 6, wherein, The coffee bean roasting mechanism also includes a temperature sensor, which is disposed inside the roasting drum and electrically connected to the turbine fan.

10. A coffee roaster, characterized by The coffee bean roasting apparatus included in any one of claims 1 to 9.

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