Hot air automatic coffee roasting machine and its control system

Abstract

This invention proposes a hot air automatic coffee roaster and its control system, including a roasting barrel assembly, a smoke extraction and storage assembly, and an electrical control assembly. The roasting barrel assembly includes a roasting heat source and a roasting chamber. The roasting chamber is equipped with a transparent observation wall for observing the roasting of coffee beans. The roasting heat source includes a fan and heating wires controlled by the electrical control assembly, which roast the raw materials in the roasting chamber with hot air. The electrical control assembly has an embedded control system, and its operating modes include manual roasting and automatic roasting. The control system records the roasting heat source conditions at each stage of the coffee bean roasting process and stores them as roasting schemes corresponding to roasting quality. When the electrical control assembly is in automatic roasting mode, the control system controls the fan and heating wires according to the roasting heat source conditions recorded in the roasting scheme. This invention has a silver husk separation function and can store the optimal roasting process of coffee beans as a reusable automatic roasting scheme.

Description

Technical Field

[0001] The invention relates to the technical field of living facilities, in particular to a hot air type automatic coffee roasting machine and a control system thereof. Background Art

[0002] During the coffee bean roasting process, coffee beans are very sensitive to fire, air damper, pressure, etc. Any delay will cause the coffee quality to deteriorate. If the roaster is a little slow in thinking and analysis during roasting, he will not be able to keep up with the chemical changes of the coffee beans, thus affecting the quality. How to solve this difficulty with automated equipment is a research direction. Summary of the invention

[0003] The present invention provides a hot air type automatic coffee roasting machine and a control system thereof, which has a silver skin separation function and can store a better roasting process of coffee beans as a repeatable automatic roasting scheme.

[0004] The present invention adopts the following technical solutions.

[0005] A hot air automatic coffee roasting machine and a control system thereof are used for roasting coffee beans. The roasting machine comprises a roasting barrel component (1), a smoke exhaust storage component (2) and an electrical control component (3); the roasting barrel component comprises a roasting heat source and a roasting chamber (15); the roasting chamber is provided with a transparent observation wall for observing the roasting of coffee beans; the roasting heat source comprises a fan (12) and a heating wire (14) controlled by the electrical control component (3), and the raw materials in the roasting chamber are roasted with the output hot air; the electrical control component (3) is embedded with a control system, the working modes of the electrical control component (3) include manual roasting and automatic roasting, the control system records the roasting heat source working conditions at each stage of the coffee bean roasting process, and stores them as a roasting scheme corresponding to the roasting quality; when the working mode of the electrical control component (3) is automatic roasting, the control system controls the fan and the heating wire according to the roasting heat source working conditions recorded in the roasting scheme.

[0006] The roasting heat source working conditions include the heating wire temperature, the heating wire heating time, the fan pressure, the fan blowing time and the coffee bean temperature in the roasting chamber.

[0007] The control system uses sensors at the roasting barrel assembly to monitor and collect heating wire temperature data and fan pressure data, and also collects coffee bean temperature data in the roasting chamber; the control system stores roasting plans at a cloud server; the cloud server provides roasting plan calling interaction in the form of a QR code, and when the electrical control assembly (3) works in automatic roasting, the required roasting plan is called from the cloud server by scanning the QR code.

[0008] The baking chamber comprises a wok placed in a wok supporting shell (13); the baking heat source is arranged below the wok; the fan of the baking heat source is arranged below the heating wire and the air outlet faces the heating wire; the heating wire of the baking heat source is adjacent to the air inlet at the bottom of the wok; the transparent observation wall of the baking chamber is a double-layer transparent structure composed of mutually adjacent transparent parts of the wok wall and transparent parts of the wok supporting shell wall.

[0009] The stir-fry barrel support shell is arranged on the base (11); and the baking heat source is arranged inside the stir-fry barrel support shell.

[0010] The smoke exhaust storage assembly comprises a spring cover assembly (21), a bean receiving bottle (22) and a coffee bean skin separation barrel (23); the coffee bean skin separation barrel is in communication with a coffee bean skin separation device (16) above the roasting chamber; the working state of the coffee bean skin separation device can be switched between a coffee bean skin separation working state and a coffee bean storage working state; and the outlet at the bottom end of the coffee bean skin separation barrel can be set to an open state or a closed state.

[0011] When the coffee beans are roasted in the roasting chamber, a silver skin storage container is connected to the bottom outlet of the silver skin separation barrel, and the hot air flow blown into the roasting chamber by the fan heats and stirs the coffee bean raw materials in the roasting chamber, and blows the silver skin separated from the coffee bean raw materials into the silver skin separation device in the silver skin separation working state, so that the silver skin falls into the silver skin storage container and the roasting smoke is discharged from the upper smoke exhaust port (100) of the silver skin separation barrel; when the roasting is finished, the bottom outlet (200) of the silver skin separation barrel is opened to communicate with the bean receiving bottle, and the fan increases the wind pressure to blow the roasted coffee beans in the roasting chamber into the silver skin separation device in the coffee bean storage working state, so that the roasted coffee beans enter the bean receiving bottle through the bottom of the silver skin separation device.

[0012] The silver skin separation device comprises a silver skin separator and a pressure cover (161) covering the upper end of the silver skin separator; the silver skin separator comprises an outer layer separator shell (162), a middle layer guide ring (164) and an inner layer silver skin separation ring (163) which are overlapped and connected; a silver skin separation output port (300) is provided at the connection portion between the separator shell and the guide ring; the silver skin separation output port is communicated with a separation barrel input port (400) at the side wall of the silver skin separation barrel; the silver skin separation device is connected to the material output port at the top of the baking chamber via the silver skin separation ring;

[0013] The silver skin separation barrel comprises a separation barrel wall (231), a material guide cone (232) at the bottom, and a smoke exhaust pipe (233) at the top; the smoke exhaust port of the smoke exhaust pipe is arranged at the top of the silver skin separation barrel;

[0014] The gland is connected to the silver skin separation ring to form a combination that can rotate horizontally at the guide ring; the silver skin separation ring is provided with a silver skin filtering area and a coffee bean passage at the ring wall; the silver skin filtering area is densely covered with strip filter holes; the strip filter holes allow silver skin to pass through but cannot pass coffee beans;

[0015] When the assembly rotates so that the coffee bean passing port faces the silver skin separation output port, the silver skin separation device is in a coffee bean storage working state;

[0016] When the assembly rotates so that the coffee bean passage opening faces the wall of the guide ring, the coffee bean passage opening is blocked by the wall of the guide ring, and the silver skin separation device is in a silver skin separation working condition.

[0017] When the silver skin separation device is in the silver skin separation working condition, the bottom outlet of the silver skin separation barrel is closed and the top smoke exhaust port is opened, the combination rotates so that the coffee bean passage port is blocked by the guide ring wall, and the silver skin that falls off during the roasting process of the coffee bean raw materials is blown out from the material output port of the roasting chamber into the silver skin separation ring by the fan airflow. The silver skin filtering area of ​​the combination filters the fan airflow to block the coffee beans from entering the silver skin separation barrel. After the fan airflow passes through the silver skin filtering area and enters the silver skin separation barrel, the flow rate decreases due to the widening of the airflow channel, and the silver skin in the airflow falls to the bottom outlet and is discharged, and the smoke of the airflow is output from the smoke exhaust port.

[0018] When the silver skin separation device is in the coffee bean storage condition, the bottom outlet of the silver skin separation barrel is opened and connected to the bean receiving bottle, the assembly rotates so that the coffee bean passing port faces the silver skin separation output port, and the fan increases the wind pressure to blow the finished roasted coffee beans in the roasting room from the material output port to the silver skin separation ring, and then deliver them to the silver skin separation barrel through the coffee bean passing port and the silver skin separation output port. After the airflow of the fan enters the barrel cavity of the silver skin separation barrel, the flow rate decreases due to the widening of the airflow channel, causing the coffee beans to fall from the airflow and be discharged through the bottom outlet of the silver skin separation barrel to be stored in the bean receiving bottle.

[0019] In the present invention, the fire and air dampers of the roasting heat source are all digitally controlled, and the temperature, time, and pressure are fully digitally collected, transforming the traditional manual control records and human brain thinking into real-time records, digital analysis, and visual management, making roasting simple and easy to understand, and achieving a breakthrough in roasting quality. Because during the roasting process, coffee beans are very sensitive to fire, air dampers, pressure, etc., and a slight delay will cause the coffee quality to deteriorate. If the roaster's roasting thinking and analysis are a little slow, he will not be able to catch up with the chemical changes of the coffee beans, thereby affecting the quality. After digital control and collection, all data are visualized, and the system automatically analyzes to form a visualized result, and automatic control can avoid this problem.

[0020] In the present invention, the roasting chamber is a double-layer transparent design, which allows intuitive observation of the roasting form and degree of coffee beans. It also has a temperature detection and feedback system, which can automatically control according to different coffee varieties and different roasting requirements, thereby improving the quality and pleasure of coffee roasting. Users can also use the manual mode to observe the roasting process to summarize roasting experience and form a better roasting plan.

[0021] In the automatic roasting function of the present invention, the system monitors the working conditions of the roaster (real-time temperature, power, air damper, bean temperature, etc.). Once it is found that the real-time temperature of the coffee beans is inconsistent with the used solution, the system will perform fuzzy calculation according to the characteristics of the coffee beans and the roaster, and environmental parameters, and automatically adjust the power and air damper to return the bean temperature to the data contained in the roasting solution, thereby ensuring that the quality of the roasted coffee beans is consistent with the roasting solution.

[0022] The present invention stores roasting schemes on a cloud server and can automatically generate a QR code. Users only need to scan the QR code, and the app will automatically call the standard scheme in the cloud server and perform automatic roasting according to the scheme, which can facilitate user communication and coffee bean promotion and is conducive to the promotion of domestic coffee beans.

[0023] The present invention is provided with a cloud control function, and the control system can receive the control data recorded by the cloud baking in real time, so as to realize accurate control under unattended conditions. After the control, all parameters are collected in real time and summarized to the cloud server, so that the cloud baking can be realized easily and remote teaching guidance is also convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] Attached Figure 1 is a schematic diagram of the present invention;

[0026] Attached Figure 1a is another schematic diagram of the present invention;

[0027] Attached Figure 2 is a schematic diagram of a base of the present invention;

[0028] Attached Figure 3 is a schematic diagram of a spring cover assembly at a base of the present invention;

[0029] Attached Figure 4 is a schematic diagram of a silver skin separation device covered with a gland;

[0030] Attached Figure 5 is a schematic diagram of the silver skin separation device with the gland removed;

[0031] Attached Figure 6 It is a schematic diagram of the silver skin separation barrel;

[0032] Attached Figure 6a This is another diagram of the silver skin separation barrel;

[0033] Attached Figure 7 It is a schematic diagram of the baking process;

[0034] Attached Figure 8 It is a schematic diagram of the principle of the electrical control components;

[0035] In the figure: 1- frying barrel assembly; 2- smoke exhaust storage assembly; 3- electrical control assembly; 11- base; 12- fan; 13- frying barrel support shell; 14- heating wire; 15- baking chamber; 16- silver skin separation device;

[0036] 21- spring cover assembly; 22- bean collecting bottle; 23- silver skin separation barrel;

[0037] 100-smoke exhaust port;

[0038] 111-housing fixing ring; 112-spring cover fixing ring; 161-pressure cover; 162-external separator housing; 163-silver skin separation ring; 164-guide ring;

[0039] 200-Silver skin separation barrel bottom outlet;

[0040] 211-spring cover movable ring; 212-spring; 231-separation cylinder wall; 232-material guide cone; 233-smoke exhaust pipe;

[0041] 300-Silver skin separation output port; 400-Separation barrel input port. DETAILED DESCRIPTION

[0042] like Figure 1-8 As shown, a hot air automatic coffee roasting machine and its control system are used for roasting coffee beans, and the roasting machine includes a roasting barrel component 1, a smoke exhaust storage component 2 and an electrical control component 3; the roasting barrel component includes a roasting heat source and a roasting chamber 15; the roasting chamber is provided with a transparent observation wall for observing the roasting of coffee beans; the roasting heat source includes a fan 12 and a heating wire 14 controlled by the electrical control component 3, and the raw materials in the roasting chamber are roasted with the output hot air; the electrical control component 3 is embedded with a control system, and the working modes of the electrical control component 3 include manual roasting and automatic roasting, and the control system records the roasting heat source working conditions at each stage of the coffee bean roasting process, and stores them as a roasting scheme corresponding to the roasting quality; when the working mode of the electrical control component 3 is automatic roasting, the control system controls the fan and the heating wire according to the roasting heat source working conditions recorded in the roasting scheme.

[0043] The roasting heat source working conditions include the heating wire temperature, the heating wire heating time, the fan pressure, the fan blowing time and the coffee bean temperature in the roasting chamber.

[0044] The control system uses sensors at the roasting barrel assembly to monitor and collect heating wire temperature data and fan pressure data, and also collects coffee bean temperature data in the roasting chamber; the control system stores roasting plans at the cloud server end; the cloud server end provides roasting plan call interaction in the form of a QR code, and when the electrical control component 3 works in automatic roasting, the required roasting plan is called from the cloud server end by scanning the QR code.

[0045] The baking chamber includes a wok placed in a wok supporting shell 13; the baking heat source is arranged below the wok; the fan of the baking heat source is arranged below the heating wire and the air outlet faces the heating wire; the heating wire of the baking heat source is adjacent to the lower air inlet of the wok; the transparent observation wall of the baking chamber is a double-layer transparent structure composed of mutually adjacent transparent parts of the wok wall and transparent parts of the wok supporting shell wall.

[0046] The stir-fry barrel supporting shell is arranged on the base 11; the baking heat source is arranged in the stir-fry barrel supporting shell.

[0047] The smoke exhaust storage assembly includes a spring cover assembly 21, a bean receiving bottle 22 and a silver skin separation barrel 23; the silver skin separation barrel is connected to the silver skin separation device 16 above the roasting chamber, and the working state of the silver skin separation device can be switched between the silver skin separation condition and the coffee bean storage condition, and the bottom outlet of the silver skin separation barrel can be set to an open state or a closed state.

[0048] When the coffee beans are roasted in the roasting chamber, a silver skin storage container is connected to the bottom outlet of the silver skin separation barrel, and the hot air flow blown into the roasting chamber by the fan heats and stirs the coffee bean raw materials in the roasting chamber, and blows the silver skin separated from the coffee bean raw materials into the silver skin separation device in the silver skin separation working condition, so that the silver skin falls into the silver skin storage container and the roasting smoke is discharged from the upper smoke exhaust port 100 of the silver skin separation barrel; when the roasting is finished, the bottom outlet 200 of the silver skin separation barrel is opened to communicate with the bean receiving bottle, and the fan increases the wind pressure to blow the roasted coffee beans in the roasting chamber into the silver skin separation device in the coffee bean storage working condition, so that the roasted coffee beans enter the bean receiving bottle through the bottom of the silver skin separation device.

[0049] The silver skin separation device comprises a silver skin separator and a pressure cover 161 covering the upper end of the silver skin separator; the silver skin separator comprises an outer layer separator housing 162, a middle layer guide ring 164 and an inner layer silver skin separation ring 163 which are overlapped and connected; a silver skin separation output port 300 is provided at the connection portion between the separator housing and the guide ring; the silver skin separation output port is communicated with a separation barrel input port 400 at the side wall of the silver skin separation barrel; the silver skin separation device is connected to the material output port at the top of the baking chamber by the silver skin separation ring;

[0050] The silver skin separation barrel comprises a separation barrel wall 231, a guide cone 232 at the bottom and a smoke exhaust pipe 233 at the top; the smoke exhaust port of the smoke exhaust pipe is arranged at the top of the silver skin separation barrel;

[0051] The gland is connected to the silver skin separation ring to form a combination that can rotate horizontally at the guide ring; the silver skin separation ring is provided with a silver skin filtering area and a coffee bean passage at the ring wall; the silver skin filtering area is densely covered with strip filter holes; the strip filter holes allow silver skin to pass through but cannot pass coffee beans;

[0052] When the assembly rotates so that the coffee bean passing port faces the silver skin separation output port, the silver skin separation device is in a coffee bean storage working state;

[0053] When the assembly rotates so that the coffee bean passage opening faces the wall of the guide ring, the coffee bean passage opening is blocked by the wall of the guide ring, and the silver skin separation device is in a silver skin separation working condition.

[0054] When the silver skin separation device is in the silver skin separation working condition, the bottom outlet of the silver skin separation barrel is closed and the top smoke exhaust port is opened, the combination rotates so that the coffee bean passage port is blocked by the guide ring wall, and the silver skin that falls off during the roasting process of the coffee bean raw materials is blown out from the material output port of the roasting chamber into the silver skin separation ring by the fan airflow. The silver skin filtering area of ​​the combination filters the fan airflow to block the coffee beans from entering the silver skin separation barrel. After the fan airflow passes through the silver skin filtering area and enters the silver skin separation barrel, the flow rate decreases due to the widening of the airflow channel, and the silver skin in the airflow falls to the bottom outlet and is discharged, and the smoke of the airflow is output from the smoke exhaust port.

[0055] When the silver skin separation device is in the coffee bean storage condition, the bottom outlet of the silver skin separation barrel is opened and connected to the bean receiving bottle, the assembly rotates so that the coffee bean passing port faces the silver skin separation output port, and the fan increases the wind pressure to blow the finished roasted coffee beans in the roasting room from the material output port to the silver skin separation ring, and then deliver them to the silver skin separation barrel through the coffee bean passing port and the silver skin separation output port. After the airflow of the fan enters the barrel cavity of the silver skin separation barrel, the flow rate decreases due to the widening of the airflow channel, causing the coffee beans to fall from the airflow and be discharged through the bottom outlet of the silver skin separation barrel to be stored in the bean receiving bottle.

[0056] In this example, a shell fixing ring 111 for fixing the stir-fry barrel support shell and a spring cover assembly 21 for placing the bean collecting bottle are provided on the base. The spring cover assembly includes a spring cover fixing ring 112, a spring cover movable ring 211 and a spring 212. One end of the spring 212 is fixed to the base in the middle of the spring cover fixing ring 112, and the other end is fixed to the middle of the spring cover movable ring 211.

[0057] The bean receiving bottle is placed on the top surface of the spring cover assembly at the end of roasting, and the mouth of the bean receiving bottle is pressed to the bottom outlet of the silver skin separation barrel by the elastic force of the spring in the spring cover assembly.

[0058] During the coffee roasting process, the coffee beans are first placed in the roasting barrel, the fan 12 is turned on, and then the heating wire is turned on. The wind flow direction is shown in the figure. When the wind flows through the heating wire, hot air is formed, and then enters the roasting barrel to stir and heat the coffee beans until the coffee beans are roasted to a suitable degree. At this time, the coffee bean passage opening (large gap) of the separation ring 163 is blocked near the guide ring, and the coffee beans cannot pass through the separation ring 163. Only the silver skin can pass through the bar-shaped holes in the separation ring 163 and be discharged from the silver skin separation barrel.

[0059] When the coffee beans are roasted, the pressure cover 161 and the silver skin separation ring are rotated 180 degrees. At this time, the coffee beans pass through the opening (large notch) of the silver skin separation ring 163 toward the silver skin separation barrel, and the fan speed is increased until the coffee beans are blown out of the roasting barrel and blown into the silver skin separation barrel along the air flow. The air flow in the silver skin separation barrel weakens and the coffee beans fall into the bean receiving bottle 22.

Claims

1. A control system for a hot air automatic coffee roasting machine for roasting coffee beans, characterized in that: The roasting machine comprises a roasting barrel component (1), a smoke exhaust storage component (2) and an electrical control component (3); the roasting barrel component comprises a roasting heat source and a roasting chamber (15); the roasting chamber is provided with a transparent observation wall for observing the roasting of coffee beans; the roasting heat source comprises a fan (12) and a heating wire (14) controlled by the electrical control component (3), and the hot air outputted is used to roast the raw materials in the roasting chamber; the electrical control component (3) is embedded with a control system, and the working modes of the electrical control component (3) include manual roasting and automatic roasting, and the control system records the roasting heat source working conditions at each stage of the coffee bean roasting process and stores them as a roasting scheme corresponding to the roasting quality; when the working mode of the electrical control component (3) is automatic roasting, the control system controls the fan and the heating wire according to the roasting heat source working conditions recorded in the roasting scheme; The roasting heat source working conditions include the temperature of the heating wire, the heating time of the heating wire, the air pressure of the fan, the blowing time of the fan and the temperature of the coffee beans in the roasting chamber; The baking chamber comprises a wok placed in a wok supporting shell (13); the baking heat source is arranged below the wok; the fan of the baking heat source is arranged below the heating wire and the air outlet faces the heating wire; the heating wire of the baking heat source is adjacent to the air inlet at the bottom of the wok; the transparent observation wall of the baking chamber is a double-layer transparent structure composed of mutually adjacent transparent parts of the wok wall and transparent parts of the wok supporting shell wall; The smoke exhaust storage assembly comprises a spring cover assembly (21), a bean receiving bottle (22) and a coffee bean skin separation barrel (23); the coffee bean skin separation barrel is in communication with a coffee bean skin separation device (16) above the roasting chamber, the working state of the coffee bean skin separation device can be switched between a coffee bean skin separation working state and a coffee bean storage working state, and the outlet at the bottom end of the coffee bean skin separation barrel can be set to an open state or a closed state; The control system includes a cloud control function, which is used to receive control data recorded by cloud devices in real time to achieve accurate control in unattended situations.

2. The control system of the hot air automatic coffee roasting machine according to claim 1, characterized in that: The control system uses sensors at the roasting barrel assembly to monitor and collect heating wire temperature data and fan pressure data, and also collects coffee bean temperature data in the roasting chamber; the control system stores roasting plans at the cloud server end; the cloud server end provides roasting plan call interaction in the form of a QR code, and when the electrical control assembly works in automatic roasting, the required roasting plan is called from the cloud server end by scanning the QR code.

3. The control system of the hot air automatic coffee roasting machine according to claim 1, characterized in that: The stir-fry barrel support shell is arranged on the base (11); and the baking heat source is arranged inside the stir-fry barrel support shell.

4. The control system of the hot air automatic coffee roasting machine according to claim 1, characterized in that: When the coffee beans are roasted in the roasting chamber, a silver skin storage container is connected to the bottom outlet of the silver skin separation barrel, and the hot air flow blown into the roasting chamber by the fan heats and stirs the coffee bean raw materials in the roasting chamber, and blows the silver skin separated from the coffee bean raw materials into the silver skin separation device in the silver skin separation working condition, so that the silver skin falls into the silver skin storage container and the roasting smoke is discharged from the upper smoke exhaust port of the silver skin separation barrel; when the roasting is finished, the bottom outlet of the silver skin separation barrel is opened to communicate with the bean receiving bottle, and the fan increases the wind pressure to blow the roasted coffee beans in the roasting chamber into the silver skin separation device in the coffee bean storage working condition, so that the roasted coffee beans enter the bean receiving bottle through the bottom of the silver skin separation device.

5. The control system of the hot air automatic coffee roasting machine according to claim 4, characterized in that: The silver skin separation device comprises a silver skin separator and a pressure cover (161) covering the upper end of the silver skin separator; the silver skin separator comprises an outer layer separator shell (162), a middle layer guide ring (164) and an inner layer silver skin separation ring (163) which are overlapped and connected; a silver skin separation output port is provided at the connection portion between the separator shell and the guide ring; the silver skin separation output port is communicated with a separation barrel input port at the side wall of the silver skin separation barrel; the silver skin separation device is connected to a material output port at the top of the baking chamber via the silver skin separation ring; The silver skin separation barrel comprises a separation barrel wall (231), a material guide cone (232) at the bottom, and a smoke exhaust pipe (233) at the top; the smoke exhaust port of the smoke exhaust pipe is arranged at the top of the silver skin separation barrel; The gland is connected to the silver skin separation ring to form a combination that can rotate horizontally at the guide ring; the silver skin separation ring is provided with a silver skin filtering area and a coffee bean passage at the ring wall; the silver skin filtering area is densely covered with strip filter holes; the strip filter holes allow silver skin to pass through but cannot pass coffee beans; When the assembly rotates so that the coffee bean passing port faces the silver skin separation output port, the silver skin separation device is in a coffee bean storage working state; When the assembly rotates to make the coffee bean passage opening face toward the wall of the guide ring, the coffee bean passage opening is blocked by the wall of the guide ring, and the silver skin separation device is in the silver skin separation working condition.

6. The control system of the hot air automatic coffee roasting machine according to claim 5, characterized in that: When the silver skin separation device is in the silver skin separation working condition, the bottom outlet of the silver skin separation barrel is opened and the top smoke exhaust port is opened, the combination rotates so that the coffee bean passage port is blocked by the guide ring wall, and the silver skin that falls off during the roasting process of the coffee bean raw materials is blown out from the material output port of the roasting chamber into the silver skin separation ring by the fan airflow, and the silver skin filtering area of ​​the combination filters the fan airflow to block the coffee beans from entering the silver skin separation barrel. After the fan airflow passes through the silver skin filtering area and enters the silver skin separation barrel, the flow rate decreases due to the widening of the airflow channel, and the silver skin in the airflow falls to the bottom outlet and is discharged, and the smoke of the airflow is output from the smoke exhaust port.

7. The control system of the hot air automatic coffee roasting machine according to claim 5, characterized in that: When the silver skin separation device is in the coffee bean storage condition, the bottom outlet of the silver skin separation barrel is opened and connected to the bean receiving bottle, the assembly rotates so that the coffee bean passing port faces the silver skin separation output port, and the fan increases the wind pressure to blow the finished roasted coffee beans in the roasting room from the material output port to the silver skin separation ring, and then deliver them to the silver skin separation barrel through the coffee bean passing port and the silver skin separation output port. After the airflow of the fan enters the barrel cavity of the silver skin separation barrel, the flow rate decreases due to the widening of the airflow channel, causing the coffee beans to fall from the airflow and be discharged through the bottom outlet of the silver skin separation barrel to be stored in the bean receiving bottle.

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