A coffee sample roasting apparatus

Abstract

The utility model relates to coffee processing equipment technical field, concretely is a kind of coffee sample roasting equipment, including bottom plate, roasting box, and the detachable top cover is equipped on roasting box upper end, and there is exhaust pipe with valve on top cover;Rotary tube is in roasting box, rear end is connected with second motor, and front end is connected with shunt pipe through rotary joint, and shunt pipe outer end is connected with the guide pipe that penetrates support frame through adapter pipe;Rotary tube circumferential side is equipped with material scraping plate, stirring rod and staggered air outlet component, and air outlet component contains air outlet pipe, shunt cover, and shunt cover has multi-angle air outlet hole with annular frame and filter screen;Two support frames are equipped on bottom plate, and roasting box both ends positioning shaft is rotatably connected with support frame, and one support frame is connected with first motor, and the equipment is driven material scraping plate, stirring rod and dynamic hot air cooperation through rotary tube, solve uneven heating problem, prevent wall sticking and easy cleaning, and different requirements can be replaced air outlet component adaptation, improve sample roasting uniformity and reliability, applicable to coffee research and development and quality control.

Description

Technical Field

[0001] This utility model relates to the field of coffee processing equipment technology, specifically a coffee sample roasting device. Background Technology

[0002] Coffee roasting is a core step that determines the flavor and aroma of coffee. Sample roasting is a key step in coffee research and development, quality control and flavor testing. It has extremely high requirements for roasting uniformity and stability. It is necessary to simulate the effect of mass production by roasting a small number of samples to provide a reliable basis for flavor analysis and process optimization.

[0003] Existing coffee roasting equipment often uses fixed hot air outlets and simple stirring structures. Hot air is prone to localized accumulation or dead zones in the chamber, resulting in uneven heating of the coffee material. At the same time, the single stirring method cannot ensure that each coffee bean is fully exposed to the heat flow, often resulting in localized over-burning or under-burning. This directly affects the representativeness of the sample and interferes with subsequent flavor evaluation and process parameter setting. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a coffee sample roasting device.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a coffee sample roasting device, comprising a base plate and a roasting box, wherein the roasting box is located above the base plate, and the upper end of the roasting box is provided with a detachable top cover, the top cover is provided with an exhaust pipe, and the exhaust pipe is provided with a valve;

[0008] The roasting box has a rotating tube inside, and a second motor is fixedly installed at the rear end of the roasting box. The output end of the second motor is provided with a second drive shaft connected to the rear end of the rotating tube.

[0009] The front end of the roasting box is fixedly equipped with a diversion pipe, and the outer end of the diversion pipe is equipped with a transfer pipe. The front end of the rotating pipe is connected to the rear end of the diversion pipe through a rotary joint. The front end of the transfer pipe is equipped with a conduit that passes through the support frame. Multiple scraper plates are provided around the rotating pipe. The outer edge of the scraper plate contacts the inner wall of the roasting box. Multiple stirring rods are provided between the outer wall of the rotating pipe and the scraper plate.

[0010] Multiple air outlet components are staggered around the circumference of the rotating tube. Each air outlet component includes an air outlet pipe and a diverter sleeve. The diverter sleeve is installed at the outer end of the air outlet pipe, and the inner end of the air outlet pipe is installed on the rotating tube.

[0011] The top of the air outlet duct is equipped with a limiting plate to limit the position of the diverter sleeve. Multiple air outlet holes are set at multiple angles around the diverter sleeve. An annular frame is installed inside the air outlet hole. The annular frame is inserted into the air outlet hole and threadedly connected to the diverter sleeve. A filter screen is fixedly installed inside the annular frame.

[0012] To facilitate assembly of the top cover, the present invention is improved by fixing the top cover to the upper part of the roasting box at the four corners with screws.

[0013] To facilitate the discharge of coffee material from the base plate, the present invention includes the following improvements: two support frames are symmetrically arranged on the upper end of the base plate relative to the roasting box; positioning shafts are fixedly arranged at both ends of the roasting box; the outer ends of the positioning shafts are rotatably connected to the top of the support frames; a first motor is fixedly arranged at the top of one of the support frames; the output end of the first motor is provided with a first drive shaft connected to the outer end of the positioning shaft; one end of the first drive shaft is connected to one end of the positioning shaft via a coupling.

[0014] To improve the stability of the positioning shaft during use, the present invention includes an improvement in that a bearing is embedded in the top of the support frame, and the bearing is penetrated by the positioning shaft.

[0015] To facilitate the disassembly of the conduit and the adapter, the present invention is improved by wherein the conduit is a flexible hose and the front ends of the conduit and the adapter are connected by a flange.

[0016] To facilitate assembly of the air outlet pipe, the present invention includes the following improvements: the circumference of the rotating pipe is provided with multiple threaded grooves, one end of the air outlet pipe is inserted into the threaded groove and threadedly connected to the rotating pipe, and the other end of the air outlet pipe is inserted into the distributor sleeve and threadedly connected to the distributor sleeve.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a coffee sample roasting device, which has the following beneficial effects:

[0019] Uniform baking and efficient heat exchange:

[0020] The rotating tube drives the scraper and stirring rod to rotate, and together with the multi-angle air distribution sleeve, it achieves the synergistic effect of "dynamic stirring + three-dimensional hot air", which completely solves the problem of heat flow dead zone in traditional fixed air outlets, ensures that coffee samples are heated evenly, and avoids local over-burning or under-burning.

[0021] Non-stick wall and easy-to-clean design:

[0022] The scraper rotates close to the inner wall of the roasting chamber, effectively preventing coffee samples from adhering and keeping the equipment clean; the filter screen inside the air outlet is removable via a ring frame, making it easy to clean any debris that may remain during the roasting process and preventing pipe blockage. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This utility model Figure 1 The main view;

[0025] Figure 3 This is a three-dimensional structural diagram of the air outlet component in this utility model;

[0026] Figure 4 This utility model Figure 3 The main view;

[0027] In the diagram: 1. Base plate; 2. Roasting box; 3. Top cover; 4. Exhaust pipe; 5. Support frame; 6. Positioning shaft; 7. First motor; 8. Conduit; 9. Transfer pipe; 10. Diverter pipe; 11. Rotating pipe; 12. Scraper; 13. Stirring rod; 14. Air outlet pipe; 15. Diverter sleeve; 16. Limiting plate; 17. Air outlet; 18. Ring frame; 19. Filter screen; 20. Second motor. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-4 The present invention provides a coffee sample roasting device, including a base plate 1 and a roasting box 2. The roasting box 2 is located above the base plate 1. The upper end of the roasting box 2 is provided with a detachable top cover 3. The top cover 3 is provided with an exhaust pipe 4 and a valve is provided on the exhaust pipe 4.

[0030] The roasting box 2 has a rotating tube 11 inside, and a second motor 20 is fixedly installed at the rear end of the roasting box 2. The output end of the second motor 20 is provided with a second drive shaft connected to the rear end of the rotating tube 11.

[0031] The front end of the roasting box 2 is fixedly provided with a diversion pipe 10, and the outer end of the diversion pipe 10 is provided with a transfer pipe 9. The front end of the rotating pipe 11 is connected to the rear end of the diversion pipe 10 through a rotary joint. The front end of the transfer pipe 9 is provided with a conduit 8 that passes through the support frame 5. Multiple scraper plates 12 are provided around the rotating pipe 11. The outer edge of the scraper plate 12 contacts the inner wall of the roasting box 2. Multiple stirring rods 13 are provided between the outer wall of the rotating pipe 11 and the scraper plate 12.

[0032] Multiple air outlet components are staggered around the circumference of the rotating pipe 11. Each air outlet component includes an air outlet pipe 14 and a diverter sleeve 15. The diverter sleeve 15 is installed at the outer end of the air outlet pipe 14, and the inner end of the air outlet pipe 14 is installed on the rotating pipe 11.

[0033] The top of the air outlet duct 14 is provided with a limiting plate 16 to limit the flow divider sleeve 15. Multiple air outlet holes 17 are provided at multiple angles on the periphery of the flow divider sleeve 15. An annular frame 18 is provided inside the air outlet hole 17. The annular frame 18 is inserted into the air outlet hole 17 and threadedly connected to the flow divider sleeve 15. A filter screen 19 is fixedly installed inside the annular frame 18.

[0034] I. Work Steps:

[0035] Loading and equipment assembly:

[0036] The top cover 3 is fixed to the upper part of the roasting box 2 at the four corners by screws.

[0037] Open the removable top cover 3, pour the coffee sample into the roasting chamber 2, and then fix the top cover 3 to the top of the roasting chamber 2 using the screws at the four corners of the top cover 3. At this time, the exhaust pipe 4 valve on the top cover 3 remains open to allow exhaust during the roasting process.

[0038] Hot air system connection and start-up:

[0039] The conduit 8 is a flexible hose, and the front end of the conduit 8 is connected to the adapter 9 via a flange.

[0040] Connect the external hot air duct to the conduit 8. Since the conduit 8 is a flexible hose and is connected to the adapter 9 via a flange, it can be flexibly disassembled and assembled.

[0041] Hot air enters the distribution pipe 10 through the duct 8 and the transfer pipe 9 in sequence, and then enters the rotating pipe 11 through the rotary joint.

[0042] The air outlet assembly around the rotating tube 11 blows hot air out from the air outlet 17 around the split sleeve 15 at different angles, forming a multi-directional heat flow coverage.

[0043] Mixing and baking process:

[0044] Start the second motor 20 at the rear of the roasting box 2, which drives the rotating tube 11 to rotate via the second drive shaft.

[0045] The scraper 12 on the outer wall of the rotating tube 11 contacts the inner wall of the roasting chamber 2 as it rotates, preventing the coffee sample from sticking. The stirring rod 13 between the scraper 12 and the rotating tube 11 rotates synchronously, causing the coffee sample to suspend and loosen in the roasting chamber 2, ensuring that each bean is fully exposed to the hot air.

[0046] Meanwhile, the air outlet assembly rotates with the rotating pipe 11, dynamically adjusting the direction of the hot air and enhancing the heat exchange efficiency.

[0047] Filtration and maintenance design:

[0048] The rotating tube 11 has multiple threaded grooves on its periphery. One end of the air outlet tube 14 is inserted into the threaded groove and threadedly connected to the rotating tube 11. The other end of the air outlet tube 14 is inserted into the support frame 5 and threadedly connected to the support frame 5.

[0049] The annular bracket 18 inside the air outlet 17 of the distributor sleeve 15 secures the filter screen 19, preventing coffee samples from entering the distributor sleeve 15 or the rotating tube 11. For cleaning, the filter screen 19 can be easily removed via the threaded annular bracket 18.

[0050] In addition, the air outlet 14 is connected to the rotating tube 11 and the support frame 5 through a threaded groove, which makes it easy to disassemble and replace the air outlet 14 or the diverter sleeve 15 of different specifications (the angle of the air outlet 17 of different diverter sleeves 15 can be adapted to different baking needs).

[0051] Discharge operation:

[0052] Two support frames 5 are symmetrically arranged on the upper end of the base plate 1 to the roasting box 2. Positioning shafts 6 are fixedly arranged at both ends of the roasting box 2. The outer ends of the positioning shafts 6 are rotatably connected to the top of the support frame 5. A first motor 7 is fixedly arranged at the top of one of the support frames 5. The output end of the first motor 7 is provided with a first drive shaft connected to the outer end of the positioning shaft 6. One end of the first drive shaft is connected to one end of the positioning shaft 6 through a coupling. A bearing is embedded in the top of the support frame 5, and the bearing is penetrated by the positioning shaft 6.

[0053] After baking, remove the top cover 3 and place the designated storage box on the base plate 1.

[0054] The first motor 7 at the top of the support frame 5 is started, which drives the positioning shaft 6 to rotate through the first drive shaft and coupling, causing the roasting box 2 to tilt around the positioning shaft 6, and the coffee sample is smoothly discharged from the opening of the roasting box 2.

[0055] The bearing at the top of the support frame 5 ensures the stability of the positioning shaft 6 during rotation, preventing the equipment from shaking.

[0056] The air outlet duct 14, rotating duct 11, and support frame 5 are all connected by threads, allowing for quick replacement of air outlet ducts 14 of different diameters or diverter sleeves 15 of different air outlet angles to meet the roasting needs of green coffee beans from different origins and densities. The flange connection between the duct 8 and the adapter 9, and the screw fixing structure of the top cover 3, facilitate equipment disassembly and daily maintenance.

[0057] The first motor 7 drives the roasting box 2 to tilt through the cooperation of the positioning shaft 6 and the bearing, making the material discharge process smooth and efficient; when the second motor 20 drives the rotating tube 11 to rotate, the rotating joint ensures that the hot air pipeline remains sealed in dynamic operation, avoids heat leakage, and ensures a stable baking environment.

[0058] The valve on exhaust pipe 4 can adjust the exhaust volume, optimize the airflow circulation in the baking chamber, and reduce heat loss; the dynamic hot air system ensures baking uniformity while improving thermal efficiency and reducing energy consumption, meeting the precision and energy-saving requirements of sample baking.

[0059] Base plate 1: Made of 304 stainless steel sheet (5-8mm thick), with a brushed surface to ensure load-bearing stability and corrosion resistance, suitable for high-temperature and dusty baking environments.

[0060] Support frame 5: Made of aluminum alloy profile (such as 6061-T6) welded and formed, with anodized surface treatment, combining lightweight and structural strength, with a deep groove ball bearing (such as 6205-Z) inlaid on the top for positioning shaft 6 rotation support.

[0061] Roasting Box 2: The main body is made of high-temperature resistant 316 stainless steel (3mm thick), and the inner wall is mirror polished to reduce material adhesion; the box body is equipped with an aluminum silicate insulation layer (20mm thick) to reduce heat loss and outer wall temperature.

[0062] The top cover is made of 304 stainless steel by stamping, with food-grade silicone sealing rings inlaid on the edges, and stainless steel screws at the four corners to ensure a tight seal and easy disassembly.

[0063] Rotating tube 11: Made of high-temperature resistant seamless stainless steel tube (φ50-80mm), with smooth inner wall treatment. The rear end is connected to the motor through the second drive shaft, and the front end is connected to the diverter tube 10 through a rotary joint.

[0064] Scraper 12: Made of food-grade polytetrafluoroethylene (PTFE) with rounded edges, it fits snugly against the inner wall of the roasting box 2 to prevent materials from sticking to the wall; it is fixed to the outer wall of the rotating tube 11 by bolts.

[0065] Stirring rod 13: 304 stainless steel rod (8-10mm in diameter), with both ends welded between rotating tube 11 and scraper 12 to form a grid-like stirring structure, which improves the material turning efficiency.

[0066] Diverter pipe 10 / Transfer pipe 9: Welded from 304 stainless steel with a smooth inner wall. The connection between the transfer pipe 9 and the conduit 8 is sealed with a flange (with a graphite gasket) and can withstand hot air at 180-220℃.

[0067] Conduit 8: High-temperature resistant silicone rubber hose (operating temperature -60℃~250℃), inner diameter matching adapter 9, flange connection to ensure airtightness.

[0068] Air outlet duct 14 / diverter sleeve 15: Precision machined from 304 stainless steel. Air outlet duct 14 is connected to rotating tube 11 through threaded groove. Diverter sleeve 15 has multi-angle air outlet holes 17 (5-8mm in diameter) on its periphery and is electrolytically polished.

[0069] Filter screen 19: 304 stainless steel woven mesh (20-40 mesh), embedded in the ring frame 18, which is threadedly connected to the diverter sleeve 15 for easy disassembly and cleaning.

[0070] Exhaust pipe 4 / valve: 304 stainless steel pipe (diameter 25-32mm), with a high-temperature resistant butterfly valve installed on the top (working temperature ≤250℃) to control the exhaust volume and internal air pressure.

[0071] First motor 7 (roasting box 2 rotation): a servo motor (power 0.5-1kW) is selected, paired with a planetary reducer (reduction ratio 1:10) to ensure that the speed of the roasting box 2 is stable (5-10rpm) when it tilts to discharge material.

[0072] Second motor 20 (rotating tube 11 rotates): Variable frequency motor (power 1-1.5kW), supports stepless speed regulation from 0-60rpm, connected to the second drive shaft via synchronous belt or coupling, adapting to the stirring needs of different baking stages.

[0073] Positioning shaft 6: 45# steel quenched (hardness HRC40-45), chrome-plated for rust prevention, both ends are welded and fixed to roasting box 2, and the outer end is inserted into the deep groove ball bearing (6205-Z) at the top of support frame 5 to ensure rotation accuracy.

[0074] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0075] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A coffee sample roasting device, comprising a base plate (1) and a roasting chamber (2), characterized in that: The roasting box (2) is located above the bottom plate (1). The upper end of the roasting box (2) is provided with a detachable top cover (3). The top cover (3) is provided with an exhaust pipe (4) and a valve is provided on the exhaust pipe (4). The roasting box (2) is equipped with a rotating tube (11) inside. A second motor (20) is fixedly installed at the rear end of the roasting box (2). The output end of the second motor (20) is equipped with a second drive shaft connected to the rear end of the rotating tube (11). The front end of the roasting box (2) is fixedly provided with a diversion pipe (10), and the outer end of the diversion pipe (10) is provided with a transfer pipe (9). The front end of the rotating pipe (11) is connected to the rear end of the diversion pipe (10) through a rotary joint. The front end of the transfer pipe (9) is provided with a conduit (8) that passes through the support frame (5). Multiple scraper plates (12) are provided around the rotating pipe (11). The outer edge of the scraper plate (12) contacts the inner wall of the roasting box (2). Multiple stirring rods (13) are provided between the outer wall of the rotating pipe (11) and the scraper plate (12). Multiple air outlet components are staggered around the circumference of the rotating tube (11). The air outlet components include an air outlet pipe (14) and a diverter sleeve (15). The diverter sleeve (15) is installed at the outer end of the air outlet pipe (14), and the inner end of the air outlet pipe (14) is installed on the rotating tube (11). The top of the air outlet pipe (14) is provided with a limiting plate (16) to limit the flow divider sleeve (15). Multiple air outlet holes (17) are provided at multiple angles around the flow divider sleeve (15). An annular frame (18) is provided inside the air outlet hole (17). The annular frame (18) is inserted into the air outlet hole (17) and threadedly connected to the flow divider sleeve (15). A filter screen (19) is fixedly installed inside the annular frame (18).

2. The coffee sample roasting equipment according to claim 1, characterized in that: The top cover (3) is fixed to the upper part of the roasting box (2) by screws at the four corners.

3. The coffee sample roasting equipment according to claim 2, characterized in that: Two support frames (5) are symmetrically arranged on the upper end of the base plate (1) to the roasting box (2). The two ends of the roasting box (2) are fixedly provided with positioning shafts (6). The outer end of the positioning shaft (6) is rotatably connected to the top of the support frame (5). The top of one of the support frames (5) is fixedly provided with a first motor (7). The output end of the first motor (7) is provided with a first drive shaft connected to the outer end of the positioning shaft (6). One end of the first drive shaft is connected to one end of the positioning shaft (6) through a coupling.

4. The coffee sample roasting equipment according to claim 3, characterized in that: The top of the support frame (5) is fitted with a bearing, which is penetrated by a positioning shaft (6).

5. The coffee sample roasting equipment according to claim 4, characterized in that: The conduit (8) is a flexible hose, and the front end of the conduit (8) is connected to the adapter (9) via a flange.

6. The coffee sample roasting equipment according to claim 5, characterized in that: The rotating tube (11) has multiple threaded grooves on its periphery. One end of the air outlet tube (14) is inserted into the threaded groove and threadedly connected to the rotating tube (11). The other end of the air outlet tube (14) is inserted into the diverter sleeve (15) and threadedly connected to the diverter sleeve (15).

Images