A sand-free roasting drum

Abstract

The application belongs to the field of food processing machines, and discloses a sand-free stir-frying cylinder, which comprises a cylinder body, wherein the cylinder body comprises a material inlet, a front material blocking part, a stir-frying part and a rear material blocking part connected in sequence, and the material inlet forms a circular truncated cone-shaped material channel; the front material blocking part forms a circular truncated cone-shaped front cavity, the top surface of the front cavity is connected with the top surface of the material channel in a coplanar manner; the stir-frying part forms a cylindrical middle cavity, the top surface of the middle cavity is connected with the bottom surface of the front cavity in a coplanar manner; the rear material blocking part forms a circular truncated cone-shaped rear cavity, the bottom surface of the rear cavity is connected with the bottom surface of the middle cavity in a coplanar manner; and the inner wall of at least one of the front material blocking part, the stir-frying part and the rear material blocking part is provided with a ceramic energy storage part. Through the arrangement of the ceramic energy storage part, the temperature in the stir-frying cylinder can be kept stable during the stir-frying process of the material, and the material can be polished without adding auxiliary materials such as sand and soil.

Description

Technical Field

[0001] This invention generally relates to the field of stir-frying equipment technology. More specifically, this invention relates to a sand-free stir-frying drum. Background Technology

[0002] Food roasting is the process of heat-processing food materials such as chestnuts, peanuts, and walnuts. In order to automate and control the roasting process, various roasting machines are provided in the existing technology to realize the roasting of food. The working method is to put the material to be roasted into the roasting drum, start the heat source and drive the roasting drum to rotate for roasting, and then discharge the material from the drum after roasting.

[0003] The frying drum is a key component of the frying machine. Due to the size and layout of the machine, the drum is typically heated only in a localized area. During frying, heat-conducting auxiliary materials, such as frying sand, need to be added to the drum to maintain a stable temperature and ensure even heating of the material. However, adding these auxiliary materials increases the power load on the drum. Furthermore, after frying, both the auxiliary materials and the raw material need to be discharged from the drum and screened, making the process complex. If the separation of auxiliary materials and raw material is inadequate, the auxiliary materials may become mixed into the raw material, affecting its edibility.

[0004] Furthermore, the turning or stirring of materials is particularly important during the frying process. It is necessary to concentrate the materials in the higher-temperature areas to accelerate the frying speed, and it is also necessary to turn or stir the materials to ensure even heating. Current technologies lack sufficient control over these two aspects.

[0005] Therefore, there is an urgent need to provide a sand-free frying drum solution, so that frying can be carried out without the addition of auxiliary materials. Moreover, it can achieve uniform heating of materials and better grinding effect without the need for auxiliary materials. Summary of the Invention

[0006] To address at least one or more of the technical problems mentioned above, embodiments of the present invention provide a sand-free stir-frying cylinder comprising: a cylinder body, including a material inlet, a front baffle, a stir-frying section, and a rear baffle connected in sequence; the material inlet forming a frustum-shaped material channel; the front baffle forming a frustum-shaped front cavity, the top surface of the front cavity being coplanarly connected to the top surface of the material channel; the stir-frying section forming a cylindrical middle cavity, the top surface of the middle cavity being coplanarly connected to the bottom surface of the front cavity; and the rear baffle forming a frustum-shaped rear cavity, the bottom surface of the rear cavity being coplanarly connected to the bottom surface of the middle cavity; and a ceramic energy storage element being provided on the inner wall of at least one of the front baffle, the stir-frying section, and the rear baffle.

[0007] According to one embodiment of the present invention, the ceramic energy storage device is one or more of the following shapes: tubular, sheet-like, and spherical.

[0008] According to one embodiment of the present invention, the ceramic energy storage component is tubular; the ceramic energy storage component is disposed on the inner wall of the stir-frying part; the ceramic energy storage component extends along the axial direction of the central cavity or extends along a direction that maintains an angle greater than zero with the axial direction of the central cavity.

[0009] According to one embodiment of the present invention, the ceramic energy storage component includes a sheet-shaped main body and protrusions on the surface of the main body. The bottom surface of the main body is in contact with the inner wall of at least one of the front baffle, the stirring part, and the rear baffle. The protrusions on the surface of the main body extend toward the interior of the front cavity, the middle cavity, or the rear cavity.

[0010] According to one embodiment of the present invention, the main body of the ceramic energy storage device is any one of a circle, an ellipse, and a triangle, and the protrusions on the surface of the main body are any one of a strip, a ball, and a teardrop shape.

[0011] According to one embodiment of the present invention, the protrusion is strip-shaped, and the axis of the protrusion is coplanar with the axis of the central cavity.

[0012] According to one embodiment of the present invention, the sides of the front cavity and the rear cavity are bent toward the axial direction; or, the sides of the front cavity and the rear cavity are bent toward a direction away from the axis.

[0013] According to one embodiment of the present invention, the inner wall of the stir-frying part is provided with a stir-frying paddle, and the extending direction of the stir-frying paddle forms an angle greater than zero degrees with the axis of the central cavity.

[0014] According to one embodiment of the present invention, the stirring paddle includes a forward paddle and a reverse paddle that are spaced apart from each other along the circumferential direction of the central cavity. The forward paddle is configured such that when the cylinder rotates forward, the forward paddle guides the material to the rear cavity, and the reverse paddle guides the material to the front cavity.

[0015] According to one embodiment of the present invention, the inner wall of the front baffle is provided with a discharge guide plate, which is connected to the forward deflector plate. The arrangement is such that when the cylinder reverses, the forward deflector plate guides the material to the front cavity, and the discharge guide plate guides the material to the material channel.

[0016] In embodiments of the present invention, by setting a ceramic energy storage component inside the frying drum, the temperature inside the drum can be kept stable during the frying process, and the ceramic energy storage component can be used to polish the material without the need for adding auxiliary materials such as sand or soil. The cylindrical ceramic energy storage component further enhances the stirring effect on the material. By setting a triangular or circular ceramic energy storage component without a straight edge perpendicular to the rotation direction of the frying drum, the lag effect on the material can be reduced. By setting the ceramic energy storage component to have a sheet-like body and a raised structure, the contact area between the ceramic energy storage component and the material is increased, enhancing the heating and polishing effects. By setting the sides of the front and rear cavities to be curved towards the axis, the material is more easily concentrated, and the drop of the material during discharge is smaller and easier to control. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0018] Figure 1 A side view schematic diagram of a sand-free stir-frying drum according to an embodiment of the present invention is shown;

[0019] Figure 2 A three-dimensional schematic diagram of a sand-free stir-frying drum according to an embodiment of the present invention is shown;

[0020] Figure 3 A partial cross-sectional schematic diagram of a sand-free stir-frying drum according to an embodiment of the present invention is shown;

[0021] Figure 4 A schematic diagram of a triangular plate-shaped ceramic energy storage device according to an embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram of a circular sheet-like ceramic energy storage device according to an embodiment of the present invention is shown. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be understood that the terms "comprising" and "including" as used in the specification and claims of this invention indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0026] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] Figure 1 A side view schematic diagram of a sand-free stir-frying drum according to an embodiment of the present invention is shown.

[0028] Figure 2 A three-dimensional schematic diagram of a sand-free stir-frying drum according to an embodiment of the present invention is shown.

[0029] Figure 3 A partial cross-sectional schematic diagram of a sand-free frying drum according to an embodiment of the present invention is shown.

[0030] like Figures 1 to 3 As shown, a sand-free stir-frying cylinder includes: a cylinder body 1, comprising a material inlet 11, a front baffle 12, a stir-frying section 13, and a rear baffle 14 connected in sequence; the material inlet 11 forms a frustum-shaped material channel 110; the front baffle 12 forms a frustum-shaped front cavity 120, the top surface of the front cavity 120 being coplanarly connected to the top surface of the material channel 110; the stir-frying section 13 forms a cylindrical middle cavity 130, the top surface of the middle cavity 130 being coplanarly connected to the bottom surface of the front cavity 120; the rear baffle 14 forms a frustum-shaped rear cavity 140, the bottom surface of the rear cavity 140 being coplanarly connected to the bottom surface of the middle cavity 130; and a ceramic energy storage element 131 is provided on the inner wall of at least one of the front baffle 12, the stir-frying section 13, and the rear baffle 14.

[0031] The frying drum is a component that uses heating to fry the materials inside. The heating method and structure can adopt existing or future inventions, and this invention is not limited thereto. For example, the frying drum can be supported from both ends so that it can rotate freely around the axis of the central cavity 130, and heating tubes can be set above, below or to the side of the frying drum to heat it.

[0032] In an embodiment of the present invention, the cylinder 1 is arranged horizontally, and the material to be stir-fried is fed in and collected from the material inlet 11. The material channel 110, the front cavity 120, the middle cavity 130 and the rear cavity 140 are connected to form a cavity with an opening on one side of the material channel 110.

[0033] When the material is fed, it enters the middle cavity 130 through the material channel 110 and the front cavity 120. After being stir-fried in the middle cavity 130, it is collected from the material outlet 11 through the front cavity 120 and the material channel 110.

[0034] The material channel 110 of the material inlet 11 is a frustum-shaped cavity with a smaller top surface and a larger bottom surface. The top and bottom surfaces are connected by a through hole. The material channel 110 converges from the outside towards the central cavity 130, i.e., it is funnel-shaped. The sides are inclined to facilitate receiving the material and discharging the material.

[0035] The top surface of the frustum-shaped front cavity 120, i.e. the smaller surface, faces the material channel 110. The coplanar connection of the top surfaces of the front cavity 120 and the material channel 110 means that the material channel 110 and the front cavity 120 are connected, and their top surfaces coincide, their axes are parallel or coincident, preferably their axes coincide.

[0036] The top surface of the middle cavity 130 and the bottom surface of the front cavity 120 are coplanar and connected, which means that the middle cavity 130 and the front cavity 120 are connected, the top surface of the middle cavity 130 and the bottom surface of the front cavity 120 are coplanar, and the axes of the middle cavity 130 and the front cavity 120 are parallel or coincident, preferably the axes of the two coincident.

[0037] The bottom surface of the rear cavity 140 is coplanar with the bottom surface of the middle cavity 130, meaning that the middle cavity 130 and the rear cavity 140 are connected, the bottom surface of the rear cavity 140 is coplanar with the bottom surface of the middle cavity 130, and the axes of the middle cavity 130 and the rear cavity 140 are parallel or coincident, preferably coincident.

[0038] The front cavity 120 and the rear cavity 140 are respectively truncated cones, with their diameters gradually increasing towards the middle cavity 130. That is, the larger bottom surface faces the middle cavity 130, forming an inclined inner wall that gradually converges from the middle cavity 130 to both ends. This allows the material that is turned over to the sides of the middle cavity 130 during the stir-frying process to be blocked by the inner walls of the front cavity 120 and the rear cavity 140, causing the material to return to the middle cavity 130.

[0039] The central cavity 130 is a horizontally arranged cylindrical shape. According to one embodiment of the present invention, the top and bottom surfaces of the central cavity 130 are equal in size to the bottom surfaces of the front cavity 120 and the rear cavity 140, respectively. According to one embodiment of the present invention, the edges of the top and bottom surfaces of the central cavity 130 are connected to the edges of the bottom surfaces of the front cavity 120 and the rear cavity 140, respectively, by arc surfaces.

[0040] According to one embodiment of the present invention, a ceramic energy storage component 131 is disposed on the side wall of the central cavity 130 of the stir-frying section 13, and is used to conduct heat, grind and turn the material during the stir-frying process.

[0041] The ceramic energy storage component 131 is made of kaolin as the main raw material and fired at high temperatures. It is non-toxic and harmless, can work for a long time in high-temperature environments, and has good high-temperature resistance and corrosion resistance. It also has high thermal conductivity, good thermal stability, and a wear-resistant, smooth outer surface. The firing process is an existing process and is not limited in this invention. For example, it can be fired at 1200℃ and operate stably at 750℃. The ceramic heat storage body has a large heat capacity, enabling the storage and release of thermal energy.

[0042] In this invention, the ceramic energy storage component 131 can be simultaneously distributed in the stirring section 13, the front baffle section 12, and the rear baffle section 14, or it can be disposed on the inner wall of only one of the three. According to one embodiment of the invention, the ceramic energy storage component 131 is disposed only in the front baffle section 12 or the rear baffle section 14.

[0043] According to one embodiment of the present invention, the ceramic energy storage component 131 is provided with mounting holes, such as a central hole, for detachable installation, which facilitates replacement of the ceramic energy storage component 131.

[0044] During the roasting process, when the cylinder 1 rotates to the vicinity of the heat source, a large amount of heat is transferred to the cylinder 1. The heated cylinder 1 then transfers heat to the ceramic heat storage body. The ceramic particles in the heat storage body absorb heat and their temperature rises, transferring heat to adjacent ceramic particles. This heat transfer continues between adjacent ceramic particles until thermal equilibrium is reached. As the cylinder 1 continues to rotate and moves away from the heat source, its heat gradually dissipates, and the ceramic heat storage body begins to slowly release the stored energy, maintaining a relatively constant temperature inside the roasting cylinder. Because the ceramic heat storage body has low thermal conductivity, its heat release rate is slow. For the materials being roasted, slow heat release is beneficial for temperature control.

[0045] like Figure 3 As shown, the ceramic energy storage component 131 is tubular, with mounting seats at both ends, and is mounted in any one of the front cavity 120, middle cavity 130, and rear cavity 140 via the mounting seats. Preferably, the ceramic energy storage component 131 is disposed on the wall of the middle cavity 130 along the axial direction of the middle cavity 130. Preferably, the tubular ceramic energy storage component 131 extends along a direction that maintains a greater than zero angle with the axial direction of the middle cavity 130, and is disposed on the inner wall of the stirring section 13.

[0046] The length of the ceramic energy storage element 131 is less than the length of the central cavity 130. Multiple tubular ceramic energy storage elements 131 are arranged around the axis of the central cavity 130 and are staggered in the axial direction, so that their axial distribution covers the entire axial length of the central cavity 130. When frying materials, the tubular ceramic energy storage elements 131 stir the materials, polish the materials when in contact with them, and maintain a stable temperature near the materials through a low thermal conduction rate.

[0047] According to one embodiment of the present invention, the ceramic energy storage element 131 may be in the form of a tube, or in the form of a sheet, a ball, or one or more other shapes.

[0048] Figure 4 A schematic diagram of a triangular plate-shaped ceramic energy storage device according to an embodiment of the present invention is shown.

[0049] Figure 5 A schematic diagram of a circular sheet-like ceramic energy storage device according to an embodiment of the present invention is shown.

[0050] like Figure 4 and Figure 5 As shown, the ceramic energy storage component 131a includes a sheet-like main body 1311a and protrusions 1312a on the surface of the main body 1311a. The bottom surface of the main body 1311a is in contact with the inner wall of at least one of the front baffle 12, the stirring part 13, and the rear baffle 14. The protrusions 1312a on the surface of the main body 1311a extend toward the interior of the front cavity 120, the middle cavity 130, or the rear cavity 140. The main body of the ceramic energy storage component 131 can be any one of a circle, an ellipse, and a triangle, and the protrusions on the surface of the main body can be any one of a strip, a ball, and a teardrop shape.

[0051] exist Figure 4 In this design, the main body 1311a of the ceramic energy storage component 131 is triangular and has a curved surface with a curved arc, which is consistent with the arc of the inner wall of its installation position. For example, when the ceramic energy storage component 131 is installed on the wall of the central cavity 130, the arc of the main body 1311a is consistent with the arc of the wall of the central cavity 130, which facilitates a tight fit between the two.

[0052] During installation, any corner of the triangle faces the direction of rotation of the frying drum, thus both agitating and grinding the material and preventing it from being trapped. The material slides over the sides of the corner and the surface of the ceramic energy storage component 131. The material's sliding over the sides enhances the agitation effect. The mounting points of the triangular ceramic energy storage component 131 are located at the vertices of each corner, ensuring a secure installation and preventing it from falling off during operation.

[0053] The main body of the ceramic energy storage component 131 can also be set as a circle, an ellipse, etc. In this shape, there is no straight edge perpendicular to the rotation direction of the frying drum, which can avoid the material being stuck.

[0054] exist Figure 5 In this design, the main body 1311b of the ceramic energy storage component 131b is circular with a curved arc, consistent with the arc of the inner wall of its mounting location. The mounting point is located on the center line; optionally, the mounting point can be located on the edge of the main body, using three-point positioning for secure installation. The protrusion 1312b on the main body 1311b extends towards the interior of the central cavity.

[0055] exist Figure 4 and Figure 5 In the middle, an upward protrusion is formed from the surface of the main body. When the ceramic energy storage component 131 is installed inside the stir-frying drum, the protrusion faces the axial direction. The protrusion is strip-shaped, and the axis of the protrusion is coplanar with the axis of the central cavity 130. In the embodiment of the present invention, the protrusion increases the contact area between the ceramic energy storage component 131 and the material, and the strip-shaped protrusion creates a better stirring effect by delaying the material.

[0056] According to one embodiment of the present invention, the protrusion may also be spherical or teardrop-shaped. Spherical protrusions include hemispheres, ellipsoids, etc., extending from the surface of the main body towards the axis. Teardrop-shaped protrusions refer to a streamlined curve shaped like a teardrop along the contact surface between the material and the protrusion, reducing the hindrance effect of the protrusion on the material.

[0057] According to one embodiment of the present invention, the sides of the front cavity 120 and the rear cavity 140 are bent toward the axial direction; or, the sides of the front cavity 120 and the rear cavity 140 are bent toward the direction away from the axis.

[0058] The sides of the front cavity 120 and the rear cavity 140 are curved; that is, the side of the frustum-shaped front cavity 120 is curved. When it bends towards its axis, the slope is steeper near the middle cavity 130 and shallower further away. The steeper slope acts as a barrier to the material, concentrating it within the middle cavity 130 for cooking. The shallower slope forms a connection with external equipment. For example, the shallower slope makes the connection between the front cavity 120 and the material channel 110 smoother, especially during material discharge, where the smaller drop results in a gentler discharge speed. When bending away from its axis, the front cavity 120 and the rear cavity 140 have a larger capacity, allowing for the storage of more material.

[0059] like Figure 3 As shown, the inner wall of the stir-frying section 13 is provided with a stir-frying paddle, and the extension direction of the stir-frying paddle forms an angle greater than zero degrees with the axis of the central cavity 130.

[0060] During the stir-frying process, the materials need to be stirred to ensure even heating and prevent damage caused by localized heat buildup or insufficient heat. The stirring paddles are plate-shaped and mounted on the inner wall of the stirring section 13. As the stir-frying drum rotates, the stirring paddles 2 obstruct and guide the materials, creating a stirring effect and ensuring even heat distribution. The extension direction of the stirring paddles maintains an angle greater than zero degrees with the axis of rotation to prevent material accumulation on the stirring paddles.

[0061] The stirring paddle includes a forward paddle 133 and a reverse paddle 132 that are spaced apart from each other along the circumference of the central cavity 130. The forward paddle 133 is configured such that when the cylinder 1 rotates forward, the forward paddle 133 guides the material to the rear cavity 140, and the reverse paddle 132 guides the material to the front cavity 120.

[0062] Forward rotation of the drum refers to the direction of rotation of the drum when frying materials. Reversal refers to the direction of rotation of the drum when discharging materials. When the drum rotates forward, the reverse deflector 132 guides the material to the front cavity 120, where it is blocked by the inclined side of the front cavity and returns to the middle cavity. The forward deflector 133 guides the material to the rear cavity 140, where it is blocked by the inclined surface of the rear cavity and returns to the middle cavity.

[0063] By alternating the forward and reverse paddles 133 and 132, the material moves alternately toward the front cavity 120 and the rear cavity 140, resulting in a good mixing effect.

[0064] After frying is complete, the material needs to be discharged from the central cavity 130. The inner wall of the front baffle 12 is equipped with a discharge guide 134, which connects to a forward deflector 133. The arrangement is as follows: when the cylinder 1 reverses direction, the forward deflector 133 guides the material to the front cavity 120, and the discharge guide 134 guides the material to the material channel 110. After the material reaches the front cavity, it is guided by the discharge guide 134 to the material channel 110 and discharged from the frying cylinder through the material channel.

[0065] According to one embodiment of the present invention, at least one of the stirring paddle and the discharge guide 134 is made of the same material as the ceramic energy storage element 131.

[0066] In embodiments of the present invention, by setting a ceramic energy storage component inside the frying drum, the temperature inside the drum can be kept stable during the frying process, and the ceramic energy storage component can be used to polish the material without the need for adding auxiliary materials such as sand or soil. The cylindrical ceramic energy storage component further enhances the stirring effect on the material. By setting a triangular or circular ceramic energy storage component without a straight edge perpendicular to the rotation direction of the frying drum, the lag effect on the material can be reduced. By setting the ceramic energy storage component to have a sheet-like body and a raised structure, the contact area between the ceramic energy storage component and the material is increased, enhancing the heating and polishing effects. By setting the sides of the front and rear cavities to be curved towards the axis, the material is more easily concentrated, and the drop of the material during discharge is smaller and easier to control.

[0067] While numerous embodiments of the invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in the practice of the invention. The appended claims are intended to define the scope of protection of the invention and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A sand-free stir-frying drum, characterized in that, include: The cylinder (1) includes a material inlet (11), a front baffle (12), a stirring section (13), and a rear baffle (14) connected in sequence. The material inlet (11) forms a frustum-shaped material channel (110); The front baffle (12) forms a frustum-shaped front cavity (120), and the top surface of the front cavity (120) is coplanarly connected with the top surface of the material channel (110); The stir-frying part (13) forms a cylindrical central cavity (130), and the top surface of the central cavity (130) is coplanar with the bottom surface of the front cavity (120). The rear baffle (14) forms a frustum-shaped rear cavity (140), and the bottom surface of the rear cavity (140) is coplanar with the bottom surface of the middle cavity (130). At least one of the front baffle (12), the stir-frying section (13), and the rear baffle (14) is provided with a ceramic energy storage component (131) on its inner wall; The ceramic energy storage component (131) is in one or more of the following shapes: tubular, sheet-like, and spherical. When frying materials, the ceramic energy storage component (131) stirs the materials, polishes the materials when in contact with them, and keeps the temperature near the materials stable.

2. The sand-free stir-frying drum according to claim 1, characterized in that, The ceramic energy storage device (131) is tubular; The ceramic energy storage component (131) is disposed on the inner wall of the stir-frying part (13); The ceramic energy storage element (131) extends along the axial direction of the central cavity (130) or along a direction that maintains a greater than zero angle with the axial direction of the central cavity (130).

3. The sand-free stir-frying drum according to claim 1, characterized in that, The ceramic energy storage device (131) includes a sheet-like main body and protrusions on the surface of the main body. The bottom surface of the main body is in contact with the inner wall of at least one of the front baffle (12), the stir-frying part (13), and the rear baffle (14); The protrusions on the main body surface extend toward the interior of the front cavity (120), the middle cavity (130), or the rear cavity (140).

4. The sand-free stir-frying drum according to claim 3, characterized in that, The main body of the ceramic energy storage device (131) is any one of a circle, an ellipse, and a triangle. The protrusions on the surface of the main body are any one of strip-shaped, spherical, or teardrop-shaped.

5. The sand-free stir-frying drum according to claim 3, characterized in that, The protrusion is strip-shaped, and the axis of the protrusion is coplanar with the axis of the central cavity (130).

6. The sand-free stir-frying drum according to claim 1, characterized in that, The sides of the front cavity (120) and the rear cavity (140) are bent toward the axial direction; or, The sides of the front cavity (120) and the rear cavity (140) are bent away from the axis.

7. The sand-free stir-frying drum according to claim 1, characterized in that, The inner wall of the stir-frying section (13) is provided with stir-frying paddles. The extension direction of the stir-frying paddle forms an angle greater than zero degrees with the axis of the central cavity (130).

8. The sand-free stir-frying drum according to claim 7, characterized in that, The stir-frying tool includes a forward-facing tool (133) and a reverse-facing tool (132) spaced apart from each other along the circumference of the central cavity (130). The forward paddle (133) is configured such that when the cylinder (1) rotates forward, the forward paddle (133) guides the material to the rear cavity (140), and the reverse paddle (132) guides the material to the front cavity (120).

9. The sand-free stir-frying drum according to claim 8, characterized in that, The inner wall of the front baffle (12) is provided with a discharge guide plate (134). The discharge guide plate (134) is connected to the forward deflector plate (133) and is configured such that when the cylinder (1) is reversed, the forward deflector plate (133) guides the material to the front cavity (120), and the discharge guide plate (134) guides the material to the material channel (110).

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