Safety, thermal isolation and energy saving structure of roaster

Abstract

Safety, thermal isolation and energy saving structure of roaster SOLUTION: The safety, heat isolation and energy saving structure of the roaster is constituted by providing a drum capable of being rotationally driven by a transmission mechanism in the roaster, providing a roasting chamber for charging farm products in the drum and providing a heating part at a proper position below the drum to heat the drum. The roaster mainly comprises a sealed heat exchange space around a drum corresponding to a roaster body, and the heat exchange space is provided with an air inlet through which an external air flow enters. The other end extending from the air inlet to the inside of the body communicates with the roasting chamber of the drum. The heat exchange space extending from the air inlet to the inside of the body does not pass through the heating part, and the external air flow first passes through the heat exchange space before entering the roasting chamber to exchange heat with the high temperature air discharged from the machine body of the roaster. Thus, the air inflow temperature is raised, the energy loss of the heating part is suppressed and the stability of the roasting temperature change is secured.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a roaster for agricultural products, and in particular to an improvement in the energy-saving structure of the roaster. [Background technology]

[0002] As is well known, when reducing the moisture content of fruits, vegetables, agricultural products, or agricultural products such as coffee beans, roasting is usually done using a roaster. However, during the roasting process and immediately after the roasting process, the outermost layer of the wall of the roasting chamber is in a high temperature state, which not only makes it easy to get burned if you accidentally touch it, but also wastes the heat energy generated during the roasting process.

[0003] Please refer to Figure 8. A conventional roaster using a semi-hot air structure includes a furnace body C1. A heat outlet C2 is provided at one end of the furnace body C1, and a rotating drum C3 is installed inside the heat outlet C2. The rotating drum C3 is rotated by a shaft C4, and coffee beans C5 are stored inside the rotating drum C3. A heat source C9 for heating is located directly at the bottom of the rotating drum C3.

[0004] Figure 9 shows the structure of a conventional all-hot air roaster. This roaster also includes a furnace body C1, with a heat outlet C2 at one end and a rotating drum C3 installed inside. The rotating drum C3 is driven to rotate by a shaft C4, and coffee beans C5 are housed inside the rotating drum C3. An inner partition plate C61 and an outer partition plate C62 are provided below the rotating drum C3, and a flow path C7 is formed between the furnace body C1 and the inner partition plate C61 and outer partition plate C62. A heat inlet C8 is provided at the lower end of the flow path C7, and a heat source C9 is located on one side of the heat inlet C8. When the heat source generates a flame, an external airflow passes through the flame, generating hot air that roasts the coffee beans C5 inside the rotating drum C3.

[0005] In both of the above two types of conventional roasters, the heat source for generating the flame is located at the air inlet. Therefore, when external airflow passes through the heat source and enters the drum, the flame fluctuates, affecting the heating temperature and causing large fluctuations in the heating temperature throughout the roast. As a result, not only does this result in a large loss of heating energy, but the high temperature also reaches the outer layer of the furnace body, posing a risk of burns if accidentally touched. Therefore, these issues need to be addressed. Summary of the Invention [Problem to be solved by the invention]

[0006] To solve the above problems, the main objective of this invention is to provide a "safe, heat-insulating, and energy-saving structure for a roaster." During the roasting process, the heat energy generated by the roaster is isolated by the machine body, and preheating is achieved by allowing the airflow entering the roasting chamber to exchange heat with the machine's heat energy. This structure prevents high temperatures from being transmitted to the outer layer of the machine and also saves the energy required for heating. [Means for solving the problem]

[0007] To achieve the above objectives, the present invention's "safe, thermally isolated, and energy-saving structure for a roaster" comprises a drum installed within the body of the roaster, with a roasting chamber for storing agricultural produce inside the drum. A heating unit is located below the drum, and a transmission mechanism is provided for rotating the drum during heating. Furthermore, a sealed heat exchange space is formed around the body of the roaster corresponding to the drum. An air inlet is provided in the heat exchange space to allow external airflow to flow in, and the other end extending from the air inlet into the body of the roaster communicates with the drum's roasting chamber.

[0008] The heat exchange space extends from the air inlet to the inside of the roaster body without passing through the heating unit. This allows the external airflow to first pass through the heat exchange space and exchange heat with the high-temperature roaster body before entering the roasting chamber, achieving a preheating effect. This reduces energy loss in the heating unit and ensures stable temperature changes during roasting.

[0009] The heat exchange space has an inner cover layer provided on the outer periphery of the drum, and an outer cover layer provided on the outer periphery of the inner cover layer. A first partition plate is provided at each end of the outer cover layer, and a second partition plate is provided at each end of the inner cover layer. A third partition plate is provided at an appropriate position below the outer cover layer, and one end of each of the two second partition plates extends to and is fixedly connected to the inner wall surface of the outer cover layer. The other end of one second partition plate is fixedly connected to the lower end of the inner cover layer, and one end of the other second partition is fixedly connected to the third partition plate. Openings corresponding to the lower plate surface of the lower end of the inner cover layer are formed on both sides of the second partition, and fourth partition plates are provided at appropriate positions above the openings between both sides of the inner cover layer and the inner wall of the outer cover layer. This separates the internal flow path connecting the roasting chamber between the drum and the inner cover layer, forming a closed first flow path and a second flow path between the outer cover layer and the inner cover layer. An air intake port communicating with the outside is provided at one end of the first flow path. The inner, first, and second flow paths form a heat exchange space. At least one first communication opening is provided at an appropriate position on the second partition wall separating the first and second flow paths. The first and second flow paths are connected, and a second communication opening is provided at an appropriate position on the inner cover layer corresponding to the second flow path, connecting the second flow path to the internal flow path. Therefore, before entering the roasting chamber, the external airflow passes through the first, second, and internal flow paths in order, exchanging heat with the high-temperature machine body and raising the intake air temperature. This not only reduces energy loss in the heating unit but also avoids the risk of burns caused by contact with the outer layer of the roaster due to high temperatures. [Brief explanation of the drawings]

[0010] [Figure 1]FIG. 1 is a three-dimensional view of the outer cover layer and inner cover layer structure of the roaster of the present invention. [Figure 2] FIG. 1 is a cross-sectional view of the right assembly of the present invention. [Figure 3] FIG. 1 is a front assembly cross-sectional view of the present invention. [Figure 4] FIG. 1 is a cross-sectional view of an embodiment of an assembly in which an exhaust pipe is installed according to the present invention. [Figure 5] FIG. 1 is a cross-sectional overhead view of an assembly of the present invention. [Figure 6] FIG. 2 is a front assembly cross-sectional view of an embodiment of a single layer drum according to the present invention. [Figure 7] FIG. 10 is an explanatory diagram showing the air flow when the heating unit is burning according to the present invention. [Figure 8] FIG. 1 is an explanatory diagram showing heating in a conventional semi-hot air roaster. [Figure 9] FIG. 1 is an explanatory diagram showing the heating of a conventional full hot air roaster. DETAILED DESCRIPTION OF THE INVENTION

[0011] Please refer to Figures 1 to 7. According to the present invention, the "safe, heat-insulating and energy-saving structure of a roaster" includes a roaster (6). The roaster (6) has a body (10) in which a drum (20), a transmission mechanism (30) and a heating unit (40) are arranged.

[0012] A machine base frame (not shown) is installed below the machine body 10, and a drum 20 is installed above it. A heating unit 40 is installed at a correspondingly appropriate position below the drum 20. The machine body 10 also has a sealed heat exchange space 50 located around the outer periphery of the drum 20. One end of the heat exchange space 50 is provided with an air intake port through which external air flows in, and the other end surrounds the outer periphery of the machine body from top to bottom and front to back, and then extends from the outside to the inside to communicate with the roasting chamber inside the drum 20. As the heat exchange space 50 extends from the machine body 10 to the inside and into the roasting chamber, it extends in an S-shaped curve along the front-to-back direction of the machine body 10, forming a structure with slightly parallel stacked layers. In addition, since the heat exchange space (50) extends from the air inlet to the inside of the machine body (10), the airflow does not pass through the heating unit (40), and the time for exchanging high-temperature heat with the machine body is increased.

[0013] The heat exchange space (50) formed by the above-mentioned machine body (10) has an inner cover layer (11) attached to the outer periphery of the drum (20), and an outer cover layer (12) attached to the outer periphery of the inner cover layer (11). First partition plates (13) are attached to both ends of the outer cover layer (12), and second partition plates (14a, 14b) are attached to both ends of the inner cover layer (11). A third partition plate (15) is installed at an appropriate position below the outer cover layer (12). Next, one end of each of the two second partition plates (14a, 14b) extends to and is fixed to the inner wall surface of the outer cover layer (12). The other end of one of the second partition plates (14a) is attached and fixedly connected to the lower end of the inner cover layer (11), and one end of the other second partition plate (14b) is fixedly connected to the third partition plate (15). In addition, openings (142) having notches are formed on both sides of the second partition plate (14b) at one end, corresponding to the plate surface below the lower end of the inner cover layer (11). The inner cover layer (12) is provided with a plurality of openings (142). Fourth partition plates (16) are installed at appropriate positions above the openings (142) between both sides of the inner cover layer (11) and the inner wall of the outer cover layer (12). Furthermore, between the drum (20) and the inner cover layer (11), an inner flow path (17) communicating with the roasting chamber (211) is separated, and a first flow path (18) and a second flow path (19) are formed between the outer cover layer (12) and the inner cover layer (11), which are sealed. The heat exchange space (50) is formed using the inner flow path (17), the first flow path (18), and the second flow path (19). An air inlet (181) communicating with the outside is provided on one end of the first flow path (18). At least one first communication portion (141) is provided at an appropriate position on the second partition plate (14b) separating the first flow path (18) from the second flow path (19), thereby connecting the first flow path (18) to the second flow path (19). The first communication portion (141) may have a structure having a notch or a through-hole. Furthermore, a second communication portion (111) in the form of a through-hole is provided in the inner cover layer (11) at an appropriate position corresponding to the second flow path (19), thereby connecting the second flow path (19) to the inner flow path (17).In this way, the airflow from the outside enters the first flow path (18) through the air inlet (181), passes through the second flow path (19) and the inner flow path (17), and then enters the roasting chamber (211). The outer edge of the inner cover layer (11) is covered with a heat isolation layer (112), which prevents the internal temperature from being transferred to the outside, conserving the heat source and preventing the external temperature of the roaster from becoming excessively high. The outer cover layer (12) and the two first partition plates (13) can be formed as a single unit or a combined structure, and the inner cover layer (11) and the two second partition plates (14a, 14b) can also be formed as a single unit or a combined structure.

[0014] The drum (20) has a hollow cylindrical structure, and can be a single-layer structure or a double-layer structure consisting of an inner cylinder (21) and an outer cylinder (22). In the case of a double-layer structure, the hollow inner periphery of the inner cylinder (21) forms a roasting chamber (211) to accommodate the produce to be roasted. The outer cylinder (22) is also hollow. After the inner cylinder (21) is placed on the inner periphery of the outer cylinder (22), a number of fins (23) are fixed between the outer periphery surface of the inner cylinder (21) and the inner wall surface of the outer cylinder (22), so that the inner cylinder (21) is suspended within the outer cylinder (22). A number of air passages (24) are formed between the two. The air passages (24) extend from the outside to the inside and communicate with the roasting chamber (211). The inner passages (17) communicate with these air passages (24). The external airflow passes through the first flow path (18) and the second flow path (19) into the inner flow path (17), and then passes through the air flow path (24) into the roasting chamber (211). A feed popper (25) is provided on the outside of the drum (20). A cylindrical lid may be provided at the outer end of the feed popper (25). The inner edge of the other end communicates with the roasting chamber (211). This allows agricultural products to be introduced into the roasting chamber (211) through the feed popper (25), and also allows high-temperature gases in the roasting chamber (211) to be exhausted from an appropriate position on the feed popper (25). Alternatively, an exhaust pipe (26) may be attached to an appropriate position on the feed popper (25). The other end of the exhaust pipe (26) penetrates the first partition plate (13) from an appropriate position to the inside, passes through the first communication part (141), the inner flow passage (17), and the second partition plate (14a), and then penetrates the other first partition plate at the other end on the opposite side to the outside, and is combined with the air extraction unit (27). In this way, the gas in the roasting chamber (211) is exhausted to the outside by the suction of the air extraction unit (27).

[0015] Please refer to Figure 6, which is a cross-sectional view of an embodiment of a single-layer drum (20') according to the present invention. The drum (20') has a roasting chamber (211) on its inner edge, and an open outer edge. A number of through-holes (201) are provided at the bottom of the inner edge. External airflow passes through the first and second flow paths (18 and 19) into the inner flow path (17), and then passes through the through-holes (201) into the roasting chamber (211). To increase the heat exchange space within the body (10), an inner partition (202) can be attached to the body (10) between the outer periphery of the drum (20') and the inner cover layer (11). The structural form of the inner partition layer (202) is the same as that of the inner cover layer (11), so that the heat exchange space (50) extends in an S-shape along the longitudinal direction of the body (10), which extends the time for the airflow to exchange high-temperature heat with the body before entering the roasting chamber (211).

[0016] The transmission mechanism (30) is used to drive and rotate the drum (20) and is structured to include a transmission shaft (31), a transmission belt (32), and a reduction motor (33). The transmission shaft (31) is assembled to the center of the inner cylinder (21), with one end penetrating to the outside. One end of the transmission belt (32) is attached to the transmission shaft (31). The other end of the transmission belt (32) is transmission-connected to one end of the reduction motor (33), which outputs power. When the reduction motor (33) is started, it drives and rotates the drum (20). This is a conventionally known technique, so a detailed description will be omitted.

[0017] The heating unit (40) is a heater that is usually fueled by gas, oil, electricity, or the like, and is disposed at an appropriate position below the drum (20) to heat the drum (20) by burning a fuel. [Effects of the invention]

[0018] Thus, the present invention employs a structural design in which an inner cover layer (11) and an outer cover layer (12) are provided around the outer periphery of the drum (20). The drum (20) can be divided from top to bottom, back to front, and outer periphery to inner periphery, and is divided into a first flow path (18), a second flow path (19), and an inner flow path (17) that can communicate with the roasting chamber (211). Therefore, when the roaster (6) roasts coffee beans, the external airflow flows into the interior of the machine through the air inlet (181) at the top end of the first flow path (18) without passing through the heating unit (40) and thus does not adversely affect the combustion of the heating unit (40). The high temperature generated by the combustion of the heating unit (40) is transferred to the machine body, but is blocked from the external air by the installation of the inner cover layer (11), the thermal isolation layer (112), and the outer cover layer (12). Furthermore, as the outside air flows through the first flow path (18), the second flow path (19), and the inner flow path (17), it exchanges heat with the high-temperature roasting chamber (211), so the temperature of the outermost layer of the roasting chamber (6) is not too high and will not cause burns to people. At the same time, as the outside air flows through the first flow path (18), the second flow path (19), and the inner flow path (17) in turn, it exchanges heat with thermal energy of different temperatures in stages. Therefore, when the outside air enters the roasting chamber, the overall temperature changes from low to high steadily. This not only reduces energy loss in the heating section (40), but also ensures stable changes in roasting temperature. [Explanation of symbols]

[0019] Roaster (6) Machine (10) Inner cover layer (11) Second communicating portion (111) Thermal isolation layer (112) Outer cover layer (12) First partition plate (13) Second partition plate (14a, 14b) First communication section (141) Opening section (142) Third partition plate (15) Fourth partition plate (16) Inner flow path (17) First flow path (18) Air inlet (181) Secondary passage (19) Drum (20, 20') Through hole (201) Inner partition layer (202) Inner cylinder (21) Roasting chamber (211) Outer cylinder (22) Fins (23) Air passages (24) Feed Popper (25) Exhaust Pipe (26) Air Extraction Unit (27) Transmission Mechanism (30) Transmission shaft (31) Transmission belt (32) Reduction motor (33) Heating unit (40) Heat exchange space (50)

Claims

1. a heating unit disposed beneath the drum and a transmission mechanism for rotating the drum during heating; a sealed heat exchange space disposed around the roaster body corresponding to the drum; an air inlet at one end of the heat exchange space for external airflow; and an air inlet at the other end surrounding the outer periphery of the machine body from top to bottom and front to back, extending from the outside to the inside to communicate with the roasting chamber of the drum; the heat exchange space does not pass through the heating unit on its way from the air inlet to the inside of the roaster body; instead, the external air first passes through the heat exchange space to exchange heat with the high-temperature roaster body before entering the roasting chamber, improving the temperature of the incoming airflow, thereby reducing energy loss in the heating unit and ensuring stable temperature changes during roasting.

2. The safety, heat isolation and energy-saving structure of the roaster as described in claim 1, characterized in that the heat exchange space extends in an S-shaped curve along the front-rear direction of the machine body when extending from the periphery to the inside and then to the roasting chamber, presenting a structure of slightly parallel stacked layers, which increases the time for the airflow to exchange high-temperature heat with the machine body.

3. In the heat exchange space, an inner cover layer is provided on the outer periphery of the drum, an outer cover layer is provided on the outer periphery of the inner cover layer, first partition plates are provided on both ends of the outer cover layer, second partition plates are provided on both ends of the inner cover layer, and a third partition plate is provided at an appropriate position below the outer cover layer, one end of each of the two second partition plates is extended and fixedly connected to the inner wall surface of the outer cover layer, the other end of one second partition plate is fixedly connected to the lower end of the inner cover layer, and one end of the other second partition is fixedly connected to the third partition plate, openings corresponding to the lower plate surfaces of the lower ends of the inner cover layer are formed on both sides of the second partition, and fourth partition plates are provided at appropriate positions above the openings between both sides of the inner cover layer and the inner wall of the outer cover layer. Thus, an internal flow path communicating with the roasting chamber is separated between the drum and the inner cover layer, and a closed first flow path and a second flow path are formed between the outer cover layer and the inner cover layer. An air intake communicating with the outside is provided at one end of the first flow path, and a heat exchange space is formed by the inner flow path, the first flow path, and the second flow path. At least one first communication part is provided at an appropriate position on the second partition wall separating the first flow path and the second flow path, connecting the first flow path and the second flow path. A second communication part is provided at an appropriate position on the inner cover layer corresponding to the second flow path, connecting the second flow path and the internal flow path. Therefore, the external airflow passes through the first flow path, the second flow path, and the internal flow path in order before entering the roasting chamber, and exchanges heat with the high-temperature machine body. This is a safe, heat-insulating, and energy-saving structure of a roasting machine.

4. The safety, heat-insulating and energy-saving structure of the roaster as described in claim 3, characterized in that the outer edge of the inner cover layer is covered with a heat-insulating layer, which can prevent the internal temperature from being transferred to the outside, conserving the heat source, and also preventing the external temperature of the roaster from becoming too high.

5. 4. The safe, heat-insulating and energy-saving structure of a roasting machine as claimed in claim 3, characterized in that the drum is composed of an inner cylinder and an outer cylinder, the roasting chamber is located on the inner edge of the inner cylinder, the inner cylinder is located inside the outer cylinder, and a number of fins are fixed between the outer edge surface of the inner cylinder and the inner wall surface of the outer cylinder, so that the inner cylinder is suspended inside the outer cylinder, and a number of air passages are formed between them, the air passages extending from the outside to the inside and communicating with the roasting chamber, and the inner passage communicates with these air passages, and the external airflow passes through the first and second passages and flows into the inner passage, and then passes through the air passages and into the roasting chamber.

6. The safety, heat isolation and energy-saving structure of a roaster as claimed in claim 3, characterized in that the first communication part has a structure with a notch or a through hole.

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