Coffee baking raw bean preheating device

Abstract

The utility model relates to the technical field of baking equipment, in particular to a coffee baking green bean preheating device which comprises a machine box, a heat insulation box is installed in the machine box, a roller for loading green beans is installed in the heat insulation box, and a heating furnace for heating the roller is installed in the heat insulation box. The machine box is provided with a stirring device for stirring raw beans in the roller and an auxiliary stirring assembly, the roller is connected with a purification system for treating baking tail gas, the roller is connected with a preheating system for preheating the raw beans, the preheating system comprises a third connecting branch pipe communicated with the roller, and the third connecting branch pipe is connected with a second connecting branch pipe communicated with the roller. The end, away from the roller, of the third connecting branch pipe is connected with a preheating containing tank for containing green beans, the preheating containing tank is connected with a second connecting branch pipe, and the second connecting branch pipe is connected with the purification system. The coffee baking raw bean preheating device has the effect of improving the high efficiency of the coffee baking raw bean preheating device in the using process.

Description

Technical Field

[0001] This application relates to the field of roasting equipment technology, and in particular to a preheating device for roasting green coffee beans. Background Technology

[0002] In daily life, many foods need to be processed through baking and roasting, the most common of which is coffee bean roasting. In order to enhance the aroma of coffee drinks, the process of roasting coffee beans is extremely important.

[0003] Common coffee roasters typically involve placing coffee beans in a drum and heating the drum. During heating, the beans are tumbled by rotating the drum or stirring to ensure even heating and prevent burning. However, most machines simply replace one batch of green beans with the next batch after roasting, directly heating and roasting the cold beans. These machines lack a device to utilize the exhaust gases generated during roasting, resulting in resource waste and increased energy consumption during the coffee roasting process. Utility Model Content

[0004] In order to improve the efficiency of coffee roasting green bean preheating device during use, this application provides a coffee roasting green bean preheating device.

[0005] This application provides a coffee roasting green bean preheating device, which adopts the following technical solution:

[0006] A coffee roasting green bean preheating device includes a chassis, an insulated box installed inside the chassis, a drum for loading green beans installed inside the insulated box, a heating furnace for heating the drum installed inside the insulated box, a stirring device and an auxiliary stirring assembly for tumbling the green beans in the drum installed on the chassis, a purification system for treating roasting exhaust gases connected to the drum, and a preheating system for preheating the green beans connected to the drum. The preheating system includes a third connecting branch pipe communicating with the drum, the end of the third connecting branch pipe away from the drum being connected to a preheating tank for loading green beans, and a second connecting branch pipe connected to the preheating tank, the second connecting branch pipe being connected to the purification system.

[0007] By adopting the above technical solution, the green coffee beans to be roasted are placed in the drum, and the drum is heated by a heating furnace. During the heating process, a stirring device is used to stir the beans to ensure that they are heated evenly. An auxiliary stirring component is used to further stir the beans, enhancing the stirring of the beans at both ends of the drum, which is beneficial to improving the roasting effect. During the roasting and turning of the green coffee beans, green beans are also loaded into the preheating tank. Because of the roasting heating, the gas temperature inside the drum is higher than the outside temperature. A portion of the roasting exhaust gas is sent to the preheating tank through a second connecting branch pipe. The hot exhaust gas generated during roasting is used to preheat the cold green beans in advance. The return flow of some gas allows for the reuse of the hot gas, reducing energy consumption. After the coffee beans in the drum are roasted, the preheated green beans are loaded into the drum to continue roasting. Through the preheating process, the green beans are in a hot state when they enter the drum, which facilitates rapid heating and roasting of the green beans in the drum, improving the efficiency of the coffee roasting green bean preheating device in the roasting process.

[0008] In one specific implementation, the stirring device includes a rotating rod rotatably mounted on the drum, a stirring blade mounted on the rotating rod, and a baffle mounted on the stirring blade.

[0009] By adopting the above technical solution, during the heating process, the rotating rod drives the stirring blade and baffle to move, and the stirring blade and baffle stir the green beans to ensure that the green beans are heated evenly. The auxiliary stirring component assists the stirring blade in stirring the green beans, enhances the stirring of green beans at both ends of the drum, which is beneficial to improving the roasting effect of green beans and improving the efficiency of the coffee roasting green bean preheating device in the roasting process.

[0010] In one specific implementation, the rotating rod has an installation groove, a guide rod is installed on the rotating rod, the guide rod is disposed in the installation groove, a slider is slidably installed on the guide rod, and a screw is threadedly connected to the slider to fix the slider on the guide rod. The stirring blade is detachably installed on the slider through the screw.

[0011] By adopting the above technical solution, the stirring blades are detachably installed on the slider with screws. The slider can be loosened on the guide rod by the screws, thereby adjusting the position of the slider and changing the installation position of the stirring blades. This allows the operator to change the spacing between each stirring blade according to the amount of raw beans being stirred, and also makes it convenient to increase or decrease the number of stirring blades according to the different sizes of raw beans being stirred, which helps to improve the stirring effect.

[0012] In one specific implementation, the auxiliary stirring assembly includes a first fixed rod and a second fixed rod. A scraper is mounted on the first fixed rod, and the end of the scraper away from the first fixed rod is mounted on the second fixed rod. A first guide plate is mounted on the first fixed rod, and the first guide plate is disposed on the side of the scraper away from the rotating rod, and the first guide plate is inclined towards the scraper.

[0013] By adopting the above technical solution, when the scraper and the first guide plate move to the bottom of the drum, the first guide plate will stir the raw beans and drive the raw beans to move to the top of the drum along with the scraper. During the movement, the raw beans will fall from the gap between the scraper and the first and second fixed rods, thereby completing the stirring of the raw beans.

[0014] In one specific implementation, a second guide plate is mounted on the first fixed rod, the second guide plate is disposed between the rotating rod and the scraper, and the second guide plate is inclined toward the scraper.

[0015] By adopting the above technical solution, the second guide plate will also tumble the raw beans when the first fixed rod rotates. The second guide plate is tilted to ensure that the second guide plate can tumble the raw beans when passing through the raw beans piled up in the drum. It also allows the raw beans to slide off the second guide plate while it moves out of the piled-up raw beans, which enhances the smoothness of the stirring of the raw beans. This prevents raw beans from accumulating on the first guide rod when tumbling the raw beans and reduces the load on the rotating rod.

[0016] In one specific implementation, a third fixed rod is mounted on the rotating rod, and a third guide plate is mounted on the third fixed rod. The third guide plate is inclined and the degree of inclination is the same as that of the first guide plate.

[0017] By adopting the above technical solution, adding a third guide plate can enhance the mixing effect.

[0018] In one specific implementation, a fourth guide plate is installed on the third fixing rod, the fourth guide plate is disposed between the third fixing rod and the second fixing rod, and the fourth guide plate is inclined.

[0019] By adopting the above technical solution, when the green beans encounter the fourth guide plate, the inclined fourth guide plate will push the green beans towards the middle position of the drum, which facilitates the exchange of green beans at both ends of the drum with the green beans in the center position during the tumbling process, ensuring that the green beans in the drum are heated evenly and enhancing the roasting effect.

[0020] In one specific implementation, a ladder frame is mounted on the third fixed rod, and the end of the ladder frame away from the third fixed rod is mounted on the second fixed rod.

[0021] By adopting the above technical solution, during the mixing process, the raw beans stirred up by the first guide plate and scraper will fall onto the ladder frame when they fall, and the ladder frame will bounce the raw beans in all directions, which helps to enhance the mixing effect of the raw beans.

[0022] In one specific implementation, the stirring plate is configured as a U-shaped plate.

[0023] By adopting the above technical solution, the stirring plate is set as a U-shaped plate. When the baffle on the stirring plate is stirring the raw beans, the U-shaped stirring plate can also stir the raw beans, which helps to enhance the stirring effect.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Place the green coffee beans to be roasted into the drum. The drum is heated by the furnace. During the heating process, the beans are stirred by a stirring device to ensure that they are heated evenly. An auxiliary stirring component further agitates the beans, enhancing the tumbling of the beans at both ends of the drum and improving the roasting effect. While roasting the coffee beans, green beans are also loaded into the preheating tank. Due to the roasting heating, the gas temperature inside the drum is higher than the outside temperature. A portion of the roasting exhaust gas is routed to the preheating tank through a second connecting branch pipe. The hot exhaust gas generated during roasting preheats the cold green beans. The partial gas recirculation allows for the reuse of the hot gas, reducing energy consumption. After the coffee beans in the drum have finished roasting, the preheated green beans are loaded back into the drum for continued roasting. The preheating process ensures that the green beans are hot when they enter the drum, facilitating rapid heating and roasting within the drum, thus improving the efficiency of the coffee roasting green bean preheating device during the roasting process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a coffee roasting green bean preheating device according to an embodiment of this application.

[0027] Figure 2 This is a cross-sectional view of the chassis according to an embodiment of this application.

[0028] Figure 3 This is a schematic diagram illustrating the connection relationship between the feed pipe and the roller in an embodiment of this application.

[0029] Figure 4 This is a cross-sectional view of the roller according to an embodiment of this application.

[0030] Figure 5 This is a schematic diagram illustrating the installation relationship between the stirring blade and the rotating rod in an embodiment of this application.

[0031] Figure 6This is a schematic diagram of the auxiliary stirring component according to an embodiment of this application.

[0032] Figure 7 This is a schematic diagram illustrating the installation position relationship between the second guide plate and the first fixing rod in an embodiment of this application.

[0033] Figure 8 This is a schematic diagram illustrating the installation position relationship between the fourth guide plate and the third fixing rod in an embodiment of this application.

[0034] Reference numerals: 1. Chassis; 11. Extension plate; 12. Feed pipe; 13. First switching valve; 14. Discharge pipe; 15. Second switching valve; 16. Feed opening; 2. Insulated box; 21. Drum; 22. Heating furnace; 23. Burner; 3. Stirring device; 31. Rotating rod; 311. Mounting slot; 32. Motor; 331. Guide rod; 332. Slider; 333. Screw; 334. Stirring blade; 335. Baffle; 34. Auxiliary stirring assembly; 341. First fixing rod; 342. Second fixing rod 343. Rod; 344. Scraper; 345. First guide plate; 346. Second guide plate; 347. Third fixed rod; 348. Ladder; 349. Third guide plate; 340. Fourth guide plate; 4. Purification system; 41. Frame; 42. First connecting branch pipe; 421. First air valve; 43. Connecting main pipe; 431. Second air valve; 45. Air dust collector; 46. Waste gas purification equipment; 5. Preheating system; 51. Preheating tank; 52. Second connecting branch pipe; 53. Heater; 54. Third connecting branch pipe. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0036] This application discloses a coffee roasting green bean preheating device, referring to... Figure 1 , Figure 2 and Figure 3 The system includes a chassis 1, an insulated box 2 fixedly installed inside the chassis 1, a drum 21 for loading green beans installed inside the insulated box 2, a heating furnace 22 for heating the drum 21 installed inside the insulated box 2, a stirring device 3 for turning the green beans inside the drum 21 installed on the chassis 1, and a purification system 4 for treating roasting exhaust gas and a preheating system 5 for hot air recirculation to preheat the green beans connected to the chassis 1.

[0037] In this embodiment, a burner 23 is fixedly installed on the casing 1. The burner 23 is connected to the interior of the heating furnace 22. Heat is provided by burning gas through the burner 23 for baking. An extension plate 11 is fixedly installed on the casing 1. A feed pipe 12 is fixedly installed on the extension plate 11. The feed pipe 12 is connected to the roller 21. A first switch valve 13 is fixedly installed on the feed pipe 12 to control the closure and connection of the pipe. A feed opening mask 16 is fixedly installed at the end of the feed pipe 12 away from the roller 21. A discharge pipe 14 is installed on the casing 1. The discharge pipe 14 is connected to the roller 21. A second switch valve 15 is fixedly installed on the discharge pipe 14 to control the closure and connection of the pipe.

[0038] Open the first switch valve 13 and feed the raw beans to be roasted into the drum 21 through the feed pipe 12. After the raw beans are loaded, close the first switch valve 13. The burner 23 and the heating furnace 22 provide heat to the drum 21. The raw beans are stirred by the stirring device 3 so that they can be heated from multiple sides to ensure that they are roasted evenly. During the roasting process, the roasting exhaust gas is treated by the purification system 4. After roasting is completed, open the second switch valve 15 to release the raw beans from the discharge pipe 14 to facilitate the quick completion of the roasting process.

[0039] Reference Figure 2 and Figure 4 The stirring device 3 includes a rotating rod 31, which is rotatably mounted on the drum 21 and coaxially arranged with the drum 21. A motor 32 for controlling the rotation of the rotating rod 31 is fixedly mounted on the housing 1. (Refer to...) Figure 4 and Figure 5 The rotating rod 31 has two or more mounting slots 311. A guide rod 331 is fixedly installed on the rotating rod 31. The guide rod 331 is set in the mounting slot 311. A slider 332 is slidably installed on the guide rod 331. A screw 333 is threadedly connected to the slider 332 to fix the slider 332 to the guide rod 331. A stirring plate 334 is detachably installed on the slider 332 through the screw 333. The stirring plate 334 is set as a U-shaped plate. A baffle 335 is fixedly connected to the end of the stirring plate 334 away from the slider 332. The baffle 335 is set on the inner side of the U-shaped stirring plate 334.

[0040] When roasting raw beans, the motor 32 controls the rotating rod 31 to rotate. The rotating rod 31 drives the stirring blade 334 to make a circular motion inside the drum 21. When the stirring blade 334 rotates to the bottom of the drum 21, it stirs the raw beans at the bottom of the drum 21. The baffle 335 drives the raw beans to move towards the side wall of the drum 21. As the baffle 335 moves towards the top of the drum 21, the raw beans fall off the baffle 335, thus completing the roasting of the raw beans. This facilitates rapid stirring of the raw beans, allowing them to be heated from multiple sides, which is convenient for rapid roasting.

[0041] Reference Figure 5 , Figure 6 and Figure 7 An auxiliary stirring assembly 34 for stirring raw beans is installed at both ends of the rotating rod 31, with auxiliary stirring blades 334 installed. The auxiliary stirring assembly 34 includes a first fixed rod 341 and a second fixed rod 342, both of which are fixedly installed on the rotating rod 31. The included angle between the first fixed rod 341 and the second fixed rod 342 is 45 degrees. An arc-shaped scraper 343 is fixedly installed on the first fixed rod 341, with the end of the scraper 343 away from the first fixed rod 341 fixedly installed on the second fixed rod 342. The inner arc surface of the scraper 343 faces the rotating rod 31. A first guide plate 344 is fixedly installed at both ends of the first fixed rod 341, with the first guide plate 344 located on the side of the scraper 343 away from the rotating rod 31 and inclined towards the outer arc surface of the scraper 343. A second guide plate 345 is fixedly installed on the first fixed rod 341. The second guide plate 345 is located on the side of the scraper 343 near the rotating rod 31, and the second guide plate 345 is inclined towards the inner arc surface of the scraper 343.

[0042] Reference Figure 6 and Figure 8 A third fixing rod 346 is fixedly installed on the rotating rod 31. The third fixing rod 346 is perpendicular to the first fixing rod 341. A ladder frame 347 is fixedly installed on the third fixing rod 346. The ladder frame 347 is divided into two sections: one is a straight frame structure, and the other is a curved frame structure. One end of the straight frame is fixedly installed on the third fixing rod 346, and the other end is fixedly installed on the second fixing rod 342. A third guide plate 348 is fixedly installed on the third fixing rod 346. The third guide plate 348 is inclined, and the inclination degree is the same as that of the first guide plate 344. A fourth guide plate 349 is fixedly installed on the third fixing rod 346. The fourth guide plate 349 is positioned between the third fixing rod 346 and the second fixing rod 342, and the fourth guide plate 349 is inclined relative to the third fixing rod 346.

[0043] When the rotating rod 31 rotates, it drives the first fixed rod 341, the second fixed rod 342, and the third fixed rod 346 to perform circular motion. When the scraper 343 and the first guide plate 344 move to the bottom of the drum 21, the first guide plate 344 will stir the raw beans and drive them to move towards the top of the drum 21 following the scraper 343. During the movement, the raw beans will fall through the gap between the scraper 343 and the first fixed rod 341 and the second fixed rod 342, thus completing the stirring of the raw beans. When the fixed rod 341 rotates, the second guide plate 345 also agitates the raw beans. The second guide plate 345 is tilted to ensure that it can agitate the raw beans when passing through the raw beans accumulated in the drum 21. It also allows the raw beans to slide off the second guide plate 345 as it moves out of the pile, enhancing the smoothness of the agitation of the raw beans. This prevents raw beans from accumulating on the first fixed rod 341 when agitating the beans, reducing the load on the rotating rod 31.

[0044] When the third fixing rod 346 rotates, the third guide plate 348 on the third fixing rod 346 will agitate the green beans to tumble. When the green beans encounter the fourth guide plate 349, the inclined fourth guide plate 349 will agitate the green beans to move towards the middle position of the drum 21, facilitating the exchange of green beans at both ends of the drum 21 with those in the center during the tumbling process. This ensures that the green beans inside the drum 21 are heated evenly and enhances the roasting effect. During the tumbling process, the green beans agitated by the first guide plate 344 and scraper 343 will fall onto the ladder frame 347 as they fall. The ladder frame 347 will bounce the green beans outwards, which helps to enhance the tumbling effect of the green beans.

[0045] Reference Figure 1 and Figure 4 The purification system 4 includes a frame 41, with a housing 1 located below the frame 41. An air separator 45 is fixedly mounted on the frame 41. A first connecting branch pipe 42 is connected to the roller 21, and a first air valve 421 is installed on the first connecting branch pipe 42. The end of the first connecting branch pipe 42 away from the roller 21 is connected to a connecting main pipe 43, one end of which is connected to the air separator 45. An exhaust gas purification device 46 is fixedly mounted on the frame 41, and the outlet end of the air separator 45 is connected to the exhaust gas purification device 46.

[0046] During the roasting process, the first gas valve 421 is opened, and the gas generated during the roasting process is introduced into the air separator 45. The centrifugal force of the air separator 45 separates the coffee skins and dust from the roasting exhaust gas, reducing pollution emissions. After passing through the air separator 45, the exhaust gas is discharged into the exhaust gas purification equipment 46, where it is treated again to reduce pollution.

[0047] The preheating system 5 includes a preheating tank 51 loaded with green coffee beans. The preheating tank 51 is fixedly mounted on a frame 41. A second connecting branch pipe 52 is connected to the preheating tank 51. The end of the second connecting branch pipe 52 away from the preheating tank 51 is connected to the outlet of the exhaust gas purification device 46. A heater 53 for heating the second connecting branch pipe 52 is fixedly mounted on the frame 41. A third connecting branch pipe 54 is fixedly connected to the discharge end of the bottom surface of the preheating tank 51. A switch valve for controlling the discharge of coffee beans into the third connecting branch pipe 54 is provided on the preheating tank 51. A connecting main pipe 43 is connected to the third connecting branch pipe 54, and a second air valve 431 is installed on the connecting main pipe 43. The end of the third connecting branch pipe 54 away from the preheating tank 51 is connected to the drum 21. In this embodiment, the air separator 45, the exhaust gas purification device 46, and the heater 53 are all prior art, and will not be described further in this embodiment.

[0048] During the roasting and turning of green coffee beans, green beans are also loaded into the preheating tank 51. Due to the roasting heating, the gas temperature inside the drum 21 is higher than the outside temperature. After the roasting exhaust gas is purified, part of it is discharged into the atmosphere, and the other part is sent to the preheating tank 51 through the second connecting branch pipe 52. Since the exhaust gas temperature is still higher than room temperature air, the hot exhaust gas generated by roasting is used to preheat the cold green beans in advance. The return of some gas allows for the reuse of the hot gas, reducing energy consumption. The heater 53 heats the second connecting branch pipe 52 to ensure that the temperature of the gas returning to the drum 21 is close to the roasting temperature. After the coffee beans in the drum 21 have finished roasting, the switch valve on the preheating tank 51 is opened, and the preheated green beans fall into the drum 21 by gravity to continue roasting. Through the preheating process, the green beans are in a hot state when they enter the drum 21, which facilitates rapid heating and roasting of the green beans in the drum 21.

[0049] The implementation principle of this application embodiment is as follows: the raw beans to be roasted are put into the drum 21 through the feeding pipe 12. After the raw beans are loaded, the burner 23 and the heating furnace 22 provide heat to the drum 21. The raw beans are stirred by the stirring device 3 so that the raw beans can be heated from multiple sides to ensure that the raw beans can be roasted evenly. During the roasting process, the roasting exhaust gas is treated by the purification system 4. After the roasting is completed, the second switch valve 15 is opened to release the raw beans from the discharge pipe 14, so as to quickly complete the roasting process of the raw beans.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coffee roasting green bean preheating device, characterized in that: The system includes a chassis (1), an insulated box (2) installed inside the chassis (1), a drum (21) for loading green beans installed inside the insulated box (2), a heating furnace (22) for heating the drum (21) installed inside the insulated box (2), a stirring device (3) for stirring the green beans in the drum (21) and an auxiliary stirring component (34) installed on the chassis (1), a purification system (4) for treating roasting exhaust gas connected to the drum (21), and a preheating system (5) for preheating the green beans connected to the drum (21). The preheating system (5) includes a third connecting branch pipe (54) communicating with the drum (21). The end of the third connecting branch pipe (54) away from the drum (21) is connected to a preheating tank (51) for loading green beans. A second connecting branch pipe (52) is connected to the preheating tank (51). The second connecting branch pipe (52) is connected to the purification system (4).

2. The coffee roasting green bean preheating device according to claim 1, characterized in that: The stirring device (3) includes a rotating rod (31), which is rotatably mounted on the drum (21). A stirring blade (334) is mounted on the rotating rod (31), and a baffle (335) is mounted on the stirring blade (334).

3. The coffee roasting green bean preheating device according to claim 2, characterized in that: The rotating rod (31) has an installation groove (311) and a guide rod (331) is installed on the rotating rod (31). The guide rod (331) is located in the installation groove (311). A slider (332) is slidably installed on the guide rod (331). A screw (333) is threadedly connected to the slider (332) to fix the slider (332) on the guide rod (331). The stirring plate (334) is detachably installed on the slider (332) through the screw (333).

4. The coffee roasting green bean preheating device according to claim 2, characterized in that: The auxiliary stirring assembly (34) includes a first fixed rod (341) and a second fixed rod (342). A scraper (343) is installed on the first fixed rod (341). One end of the scraper (343) away from the first fixed rod (341) is installed on the second fixed rod (342). A first guide plate (344) is installed on the first fixed rod (341). The first guide plate (344) is located on the side of the scraper (343) away from the rotating rod (31). The first guide plate (344) is inclined towards the scraper (343).

5. The coffee roasting green bean preheating device according to claim 4, characterized in that: A second guide plate (345) is installed on the first fixed rod (341). The second guide plate (345) is disposed between the rotating rod (31) and the scraper (343). The second guide plate (345) is inclined towards the scraper (343).

6. The coffee roasting green bean preheating device according to claim 5, characterized in that: A third fixed rod (346) is installed on the rotating rod (31), and a third guide plate (348) is installed on the third fixed rod (346). The third guide plate (348) is inclined and the degree of inclination is the same as that of the first guide plate (344).

7. A coffee roasting green bean preheating device according to claim 6, characterized in that: A fourth guide plate (349) is installed on the third fixing rod (346). The fourth guide plate (349) is disposed between the third fixing rod (346) and the second fixing rod (342). The fourth guide plate (349) is inclined.

8. A coffee roasting green bean preheating device according to claim 6, characterized in that: A ladder (347) is installed on the third fixed rod (346), and the end of the ladder (347) away from the third fixed rod (346) is installed on the second fixed rod (342).

9. A coffee roasting green bean preheating device according to claim 2, characterized in that: The stirring plate (334) is configured as a U-shaped plate.

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