Impurity separating device for bean roaster
By employing an inclined rotating drum and a negative pressure suction tube in the coffee roaster, defective coffee beans are automatically screened, solving the problem of manual screening required by existing equipment and improving roasting quality and convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI KONONG TECH CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-06-02
AI Technical Summary
Existing coffee roasting equipment lacks the function of automatically removing defective beans and impurities from coffee beans, requiring manual screening, which results in low convenience.
A coffee roaster impurity separation device was designed. By using an inclined rotating drum and guide plate in conjunction with a negative pressure suction tube, the coffee beans are automatically sorted by gravity and negative pressure difference, and substandard beans with lower density and weight are removed.
It enables automatic selection of coffee beans, improves roasting quality and convenience, and ensures the controllability of coffee bean quality.
Smart Images
Figure CN224308986U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coffee bean roasting and processing technology, and in particular to an impurity separation device for a coffee roaster. Background Technology
[0002] As people's living standards improve, their demands for material things in life are also increasing. Modern people are increasingly fond of coffee, which has become an essential beverage for many families for leisure and socializing.
[0003] There are two main types of existing coffee roasting equipment: one is the air-cooled roasting equipment, which uses a hot airflow to pass over the coffee beans. The shape of the coffee beans increases the airflow velocity as it passes over their surface, thereby reducing the pressure. This creates a pressure difference between the relative surfaces of the coffee beans, causing them to suspend in the hot air. The heat is then transferred to the coffee beans through thermal convection, resulting in a roasting effect. The other type is the drum roasting equipment, which mainly consists of a machine body with a rotating stirring drum inside. The machine body has a cavity that is connected to an external heat source. The external heat source heats the air, and a hot air fan in the cavity blows the hot air into the stirring drum. The stirring drum is driven by a servo motor to rotate and tumble at a uniform speed within the machine body, roasting the coffee beans through heat conduction.
[0004] However, most common coffee roasting equipment lacks the function of sifting out substandard beans and impurities, requiring users to manually sift the beans before roasting, which is inconvenient and needs improvement. Utility Model Content
[0005] The purpose of this invention is to provide an impurity separation device for a coffee roaster to solve the problems existing in the prior art.
[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0007] A coffee roaster impurity separation device includes a base, a rotating drum fixedly mounted on the top of the base, the axis of the rotating drum being inclined, a coaxial sleeve disposed inside the rotating drum, guide plates being axially and evenly arranged on the inner wall of the rotating drum, a ring being fitted on the top of the sleeve, the ring being axially rotatable, a sealed vent hole being provided on the sleeve, each vent hole communicating with the interior of the sleeve, the ring being a hollow shell structure, the inner ring of the ring being completely open, a plurality of connectors being axially and evenly arranged on the outer ring of the ring, one end of the connector communicating with the interior of the ring, the other end of the connector being connected to one end of a suction tube, the suction tube being under negative pressure, and the interior of the ring communicating with the interior of the sleeve through the vent hole.
[0008] By adopting the above technical solution, the drum rotates axially continuously during operation. Due to its inclined axis and the presence of guide plates on the inner wall, the coffee beans inside move from the bottom to the top along the guide plates during rotation. They then fall under the influence of gravity. The fallen coffee beans pass through the sleeve, with some passing through the vent at the top of the sleeve and then falling out through the vent at the bottom. Because the suction tube is under negative pressure, the inside of the ring and the inside of the sleeve are also under negative pressure. Therefore, gas enters the drum from the outside, then enters the sleeve through the vent, and finally enters the ring and is drawn away by the suction tube. During the roasting process, the density of spoiled coffee beans is much lighter than that of normal coffee beans, and the mass of each spoiled coffee bean is also less than that of a normal coffee bean. Therefore, by controlling the internal negative pressure parameter of the suction tube, the coffee beans passing through the sleeve can be removed.
[0009] In a further embodiment, a drive motor is provided on the top of the base, and a transmission shaft coaxial with the rotating drum is provided on the outer bottom end of the rotating drum. The output shaft of the drive motor is connected to the transmission shaft via a coupling.
[0010] In a further embodiment, a universal tube is provided at the top of the base, one end of which is connected to a hot air blower, and the other end of which faces the inner bottom of the rotating drum.
[0011] By adopting the above technical solution, the quality of coffee beans can be more controlled by roasting them with hot air, because the temperature of air is easier to control than that of an open flame, thus improving the roasting quality of coffee beans.
[0012] In a further embodiment, the vent holes are unevenly distributed.
[0013] By adopting the above technical solution, a uniform distribution will prevent most coffee beans from passing through when they fall, while an irregular arrangement will allow most coffee beans to fall in.
[0014] In a further embodiment, an end face bearing is fixedly installed at the bottom end of the ring, and the end face bearing is sleeved on the top end of the sleeve.
[0015] In a further embodiment, a dust collection box is provided on the right side of the base, and a handle is fixedly installed on the right side of the dust collection box.
[0016] By adopting the above technical solution, the drum rotates axially continuously during operation. Because its axis is inclined and its inner wall is equipped with guide plates, the coffee beans inside move from the bottom to the top along the guide plates during rotation. Then, under gravity, they fall. The fallen coffee beans pass through the sleeve, with some passing through the vent at the top of the sleeve and then falling out through the vent at the bottom. Because the suction tube is under negative pressure, and the inside of the annulus and the sleeve are also under negative pressure, gas enters the drum from the outside and then flows through the vent. The beans enter the sleeve and are eventually drawn away by the suction tube inside the ring. During the roasting process, spoiled coffee beans are much lighter than normal coffee beans, and each spoiled bean weighs less than a normal coffee bean. By controlling the negative pressure parameters inside the suction tube, the coffee beans passing through the sleeve can be removed. Furthermore, the quality of the coffee beans can be more controlled by roasting them with hot air, as the temperature of air is easier to control than that of an open flame. This improves the roasting quality of the coffee beans and allows for the screening of defective beans.
[0017] In summary, this utility model has the following beneficial effects:
[0018] 1. During operation, the drum rotates axially continuously. Due to its inclined axis and the presence of guide plates on the inner wall, the coffee beans inside move from the bottom to the top along the guide plates during rotation. Then, under gravity, they fall through the sleeve, with some passing through the vent at the top and exiting through the vent at the bottom. Because the suction tube is under negative pressure, and the inside of the annulus and sleeve are also under negative pressure, gas enters the drum from the outside and then enters the sleeve through the vent. Inside, the beans eventually enter the inner ring and are drawn away by the suction tube. During the roasting process, the density of spoiled coffee beans is much lighter than that of normal coffee beans, and the weight of each spoiled coffee bean is also less than that of a normal coffee bean. Therefore, by controlling the negative pressure parameter inside the suction tube, the coffee beans passing through the inner ring can be removed. Furthermore, the quality of the coffee beans can be more controlled by roasting them with hot air, because the temperature of air is easier to control than that of an open flame. This improves the roasting quality of the coffee beans and achieves the effect of screening out defective coffee beans. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the rotating drum structure of this utility model;
[0021] Figure 3 This is a schematic diagram of the sleeve structure of this utility model.
[0022] In the diagram, 1. base; 2. rotating drum; 3. sleeve; 4. ring; 5. suction pipe; 6. guide plate; 7. universal tube; 8. dust collection box; 9. handle; 10. hot air blower. Detailed Implementation
[0023] The present invention will be further described in detail below with reference to the accompanying drawings.
[0024] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.
[0025] Example 1:
[0026] like Figures 1-3 As shown, a coffee roaster impurity separation device includes a base 1, a rotating drum 2 fixedly installed on the top of the base 1, the axis of the rotating drum 2 being inclined, a coaxial sleeve 3 being provided inside the rotating drum 2, guide plates 6 being axially and evenly arranged on the inner wall of the rotating drum 2, a ring 4 being fitted on the top of the sleeve 3, the ring 4 being axially rotatable, a sealed vent hole being provided on the sleeve 3, each vent hole being connected to the interior of the sleeve 3, the ring 4 being a hollow shell structure, the inner ring of the ring 4 being completely open, a plurality of connectors being axially and evenly arranged on the outer ring of the ring 4, one end of the connector being connected to the interior of the ring 4, and the other end of the connector being connected to one end of a suction pipe 5, the suction pipe 5 being under negative pressure, and the interior of the ring 4 being connected to the interior of the sleeve 3 through the vent hole.
[0027] A drive motor is installed on the top of the base 1, and a transmission shaft coaxial with the rotating drum 2 is installed on the bottom outer side of the rotating drum 2. The output shaft of the drive motor is connected to the transmission shaft through a coupling.
[0028] The top of the base 1 is provided with a universal tube 7. One end of the universal tube 7 is connected to a hot air blower 10, and the other end of the universal tube 7 faces the inner bottom of the rotating drum 2. The vent holes are unevenly distributed.
[0029] An end face bearing is fixedly installed at the bottom of the ring 4, and the end face bearing is sleeved on the top of the sleeve 3. A dust collection box 8 is provided on the right side of the base 1, and a handle 9 is fixedly installed on the right side of the dust collection box 8.
[0030] Specific implementation process: During operation, the rotating drum 2 rotates axially continuously. Due to its inclined axis and the presence of a guide plate 6 on its inner wall, the coffee beans inside move from the bottom to the top along the guide plate 6 during rotation. Then, under gravity, they fall. The fallen coffee beans pass through the sleeve 3, with some passing through the vent at the top of the sleeve 3 and then falling out through the vent at the bottom. Because the suction tube 5 is under negative pressure, and the inside of the ring 4 and the sleeve 3 are also under negative pressure, gas enters the rotating drum 2 from the outside and then passes through the vent. The beans enter the sleeve 3 and eventually pass through the ring 4, where they are drawn away by the suction tube 5. During the roasting process, the density of spoiled coffee beans is much lighter than that of normal coffee beans, and the weight of each spoiled coffee bean is also less than that of a normal coffee bean. By controlling the negative pressure parameter inside the suction tube 5, the coffee beans passing through the sleeve 3 can be removed. Furthermore, the quality of the coffee beans can be more controlled by roasting them with hot air, as the temperature of air is easier to control than that of an open flame. This improves the roasting quality of the coffee beans and allows for the screening of defective coffee beans.
[0031] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.
[0032] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.
Claims
1. An impurity separation device for a coffee roaster, characterized in that: Includes a base (1), on which a rotating cylinder (2) is fixedly installed. The axis of the rotating cylinder (2) is inclined. A coaxial sleeve (3) is provided inside the rotating cylinder (2). A guide plate (6) is axially and evenly arranged on the inner wall of the rotating cylinder (2). A ring (4) is fitted on the top of the sleeve (3). The ring (4) can rotate axially. A sealed vent hole is provided on the sleeve (3). Each vent hole is connected to the inside of the sleeve (3). The ring (4) is a hollow shell structure. The inner ring of the ring (4) is completely open. A plurality of connectors are axially and evenly arranged on the outer ring of the ring (4). One end of the connector is connected to the inside of the ring (4). The other end of the connector is connected to one end of a suction tube (5). The suction tube (5) is under negative pressure. The inside of the ring (4) is connected to the inside of the sleeve (3) through the vent hole.
2. The impurity separation device for a coffee roaster according to claim 1, characterized in that: The base (1) is equipped with a drive motor at its top, and the outer bottom of the rotating drum (2) is equipped with a transmission shaft coaxial with the rotating drum (2). The output shaft of the drive motor is connected to the transmission shaft via a coupling.
3. The impurity separation device for a coffee roaster according to claim 1, characterized in that: The top of the base (1) is provided with a universal tube (7), one end of which is connected to a hot air blower (10), and the other end of the universal tube (7) faces the inner bottom of the rotating drum (2).
4. The impurity separation device for a coffee roaster according to claim 1, characterized in that: The vent holes are unevenly distributed.
5. The impurity separation device for a coffee roaster according to claim 1, characterized in that: The bottom end of the ring (4) is fixedly installed with an end face bearing, which is sleeved on the top end of the sleeve (3).
6. The impurity separation device for a coffee roaster according to claim 1, characterized in that: A dust collection box (8) is provided on the right side of the base (1), and a handle (9) is fixedly installed on the right side of the dust collection box (8).