Batch coffee bean, nut drying device

Abstract

A batch coffee beans, nuts drying equipment, including drying room, heat pump heating device and air inlet duct, the first drying screen and the second drying screen are arranged in the drying room, which is divided into a heating chamber, a first drying chamber and a second drying chamber, the heat pump heating device is installed in the heating chamber, a discharge port is arranged on the side wall of the first drying chamber, and a discharge door is arranged on the discharge port; a plurality of axial flow fans are arranged in the heating chamber, an air inlet is arranged on the side wall of the heating chamber, a part of space is reserved as an air inlet chamber at the upper part of the first drying chamber, an air inlet is arranged on the side wall of the air inlet chamber, and the air inlet and the air inlet are connected through the air inlet duct. The air inlet duct is used for introducing part of the hot air in the heating chamber into the air inlet chamber, the coffee beans or nuts above the second drying chamber are heated, the heating effect of the coffee beans or nuts above the second drying chamber is ensured, and the occurrence of moisture and decay is prevented.

Description

Technical Field

[0001] This invention relates to the field of material drying technology, specifically to a batch drying device for coffee beans and nuts. Background Technology

[0002] Chinese patent CN 217483132U discloses a batch coffee bean dryer, comprising: a conveyor belt elevator with a conveyor belt divided into a feeding end and a discharging end, the feeding end being located below the feed box; a coffee cherry peeling machine with an inlet and an outlet, the inlet being located below the discharging end of the conveyor belt, and a horizontal coffee bean peeling platform below the outlet; a drying chamber located to the side of the coffee bean peeling platform, the top of the drying chamber being open, a drying screen horizontally arranged along the inner wall of the drying chamber, a discharge door on the side of the drying chamber away from the coffee bean peeling platform, and a hot air inlet located at the bottom of the free side of the drying chamber; and a hot air blower, the output end of which is connected to the hot air inlet. The drying screen inside the drying chamber is divided into a first drying screen and a second drying screen, the first drying screen being above the second drying screen. The heat pump source heating equipment generates hot air, which is blown into the drying chamber by a hot air blower. The hot air passes through the second drying screen and the coffee beans on the second drying screen, and the first drying screen and the coffee beans on the first drying screen in sequence, completing the initial drying of the coffee beans on the first drying screen and the secondary drying of the coffee beans on the second drying screen.

[0003] In the above patent, hot air enters from the second drying screen between the coffee beans. Due to the small gaps between the coffee beans, the airflow is greatly reduced by the resistance of the beans. By the time it reaches the first drying screen, the airflow is already very low, making it difficult for the coffee beans on the first drying screen to penetrate further, resulting in poor drying of the coffee beans on the first drying screen. Moreover, even if some hot air manages to enter the coffee beans on the first screen, this air is the exhaust gas from the coffee beans on the second screen, and it contains a lot of moisture. This moisture not only fails to dry the coffee beans but also causes them to become damp and rot. Summary of the Invention

[0004] This invention provides a batch drying device for coffee beans and nuts to solve the shortcomings of existing batch coffee bean drying devices, such as the difficulty of hot air being blown into the coffee beans on the first drying screen due to the resistance of the coffee beans, resulting in poor drying effect of the coffee beans above.

[0005] The technical solution adopted in this invention is:

[0006] A batch drying device for coffee beans and nuts includes a drying chamber and a heat pump heating device. The top of the drying chamber is an open structure. A first drying screen and a second drying screen are spaced apart from bottom to top inside the drying chamber, dividing the interior into a heating chamber, a first drying chamber, and a second drying chamber. The heat pump heating device is installed in the heating chamber. A discharge port is opened on the side wall of the first drying chamber, and a discharge door is installed at the discharge port. The device also includes an air inlet duct. Several axial flow fans are spaced apart inside the heating chamber. At least one air intake is opened on the side wall of the heating chamber. A portion of the upper part of the first drying chamber is reserved as an air inlet chamber. At least one air inlet is provided on the side wall of the air inlet chamber. The air intake and the air inlet are connected by the air inlet duct.

[0007] In a preferred embodiment, a rectangular opening is formed in the lower side wall of the first drying chamber and the upper side wall of the heating chamber. The upper part of the rectangular opening forms the air inlet, the middle part forms the discharge port, and the lower part forms the air duct. The discharge port and the air duct are separated by a partition, and the top surface of the partition is aligned with the top surface of the first drying screen.

[0008] In a preferred embodiment, the aforementioned air inlet duct comprises a duct body and a mounting frame. The mounting frame is fixedly embedded in the edge of the rectangular opening. The top end of the duct body is rotatably hinged to the top of the mounting frame. The two ends of the duct body are respectively hinged to the two sides of the mounting frame via a cylinder. The duct body has an air inlet and an air outlet located on the same side. The air inlet is connected to the air intake, and the air outlet is connected to the air inlet.

[0009] In a preferred embodiment, a vertical guide groove is provided on each side of the rectangular opening, and the two sides of the unloading gate are respectively provided in the vertical guide groove. A lifting drive mechanism for the unloading gate is also provided on the side wall of the rectangular opening.

[0010] In a preferred embodiment, the above-mentioned unloading gate lifting drive mechanism includes a lifting drive motor, a rack and a gear. The rack is vertically fixed on the outer side wall of the unloading gate, the lifting drive motor is fixedly installed on the side wall of the rectangular opening, and the output end of the lifting drive motor is connected to a gear, which meshes with the rack.

[0011] In a preferred embodiment, the first drying chamber is further provided with an exhaust gas outlet on its side wall, which is connected to the heating chamber via a recovery pipeline.

[0012] In a preferred embodiment, the second drying screen has a discharge port, at which a discharge plate is rotatably connected.

[0013] As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

[0014] 1. This drying equipment has a space reserved in the upper part of the first drying chamber as an air inlet chamber with an air inlet. An air duct is located on the side of the heating chamber. The air duct connects to the air inlet through an air inlet duct, allowing some of the hot air from the heating chamber to be introduced into the air inlet chamber to heat the coffee beans or nuts above the second drying chamber. Because this hot air is directly generated by the heating chamber and is moisture-free, and is not obstructed by the coffee beans or nuts when entering the second drying chamber, it ensures effective heating of the coffee beans or nuts above the second drying chamber, preventing them from becoming damp and rotting.

[0015] 2. In this drying equipment structure, the air inlet, discharge port, and exhaust port are located at the upper, middle, and lower parts of a rectangular opening, and are sealed by an air inlet duct that can be flipped upwards to open. This reduces the workload of drilling holes and facilitates the maintenance of the air inlet duct. Attached Figure Description

[0016] Figure 1 This is a top view of the present invention.

[0017] Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0018] Figure 3 This is a diagram showing the air intake duct in the open position.

[0019] Figure 4 This is a schematic diagram showing the unloading gate in the open position. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Many details are described below to provide a comprehensive understanding of the invention, but those skilled in the art will be able to implement the invention without these details.

[0021] A batch drying device for coffee beans and nuts, referring to Figure 1 and Figure 2 It includes a drying chamber 1 and a heat pump heating device. The top of the drying chamber 1 is an open structure. The drying chamber 1 is provided with a first drying screen 11 and a second drying screen 12 from bottom to top, which divides the interior of the drying chamber into a heating chamber 10, a first drying chamber 20 and a second drying chamber 30 in sequence.

[0022] Reference Figure 1 and Figure 2The second drying screen has a discharge port, which is connected to a discharge plate 121 that can be flipped downwards. One side of the discharge plate 121 is hinged to the edge of the discharge port by a pin, and the other side is provided with a latch 122. The latch locks when the discharge plate 121 is flipped into place to close the discharge port. When it is necessary to discharge material, the latch 122 is opened, and the discharge plate 121 is flipped downwards to open the discharge port.

[0023] Reference Figure 1 and Figure 2 At least one air inlet 100 is provided on the side wall of the heating chamber 10, and an air inlet duct 13 is connected to the air inlet 100. The heating chamber 10 is equipped with a heat pump heating device (not shown in the figure) and several axial flow fans 101. The axial flow fans 101 are set at 45° to the vertical plane so that part of the heat generated by the heat pump heating device passes through the first drying screen 11 from bottom to top into the first drying chamber 20, and the other part enters the air inlet duct 13 from the air inlet.

[0024] Reference Figure 2 and Figure 3 A discharge port 200 is provided on the side wall of the first drying chamber 20, and a discharge door 201 is installed at the discharge port 200. The upper part of the first drying chamber 20 leaves a space as an air inlet chamber 21. At least one air inlet 210 is provided on the side wall of the air inlet chamber 21. The air duct 100 and the air inlet 210 are connected by an air inlet duct 13.

[0025] Preferably, refer to Figure 2 and Figure 3 In this invention, a rectangular opening is formed in the lower side wall of the first drying chamber 20 and the upper side wall of the heating chamber. The upper part of the rectangular opening forms the air inlet 210, the middle part forms the discharge port 200, and the lower part forms the air duct 100. The discharge port 200 and the air duct 100 are separated by a partition 22. The top surface of the partition 22 is aligned with the top surface of the first drying screen 11 to ensure that the material can be smoothly raked out from the discharge port 200. A belt conveyor 2 is also provided on the outer side of the upper discharge port. After the material is raked out from the discharge port 200, it falls onto the belt conveyor 2.

[0026] Reference Figure 2 and Figure 3The aforementioned air inlet duct 13 comprises a duct body 131 and a mounting frame 132. The mounting frame 132 is fixedly embedded in the edge of the rectangular opening. The top end of the duct body 131 is rotatably hinged to the top of the mounting frame 132 via a pin. Both ends of the duct body 131 are respectively hinged to the two sides of the mounting frame 132 via a cylinder 133. The inner side of the duct body 131 is provided with an air inlet 1311 and an air outlet 1312. The air inlet 1311 is connected to the air intake 100, and the air outlet 1312 is connected to the air inlet 210.

[0027] Reference Figure 2 and Figure 3 A vertical guide groove 202 is provided on each side of the rectangular opening. The two sides of the unloading gate 201 are respectively located within the vertical guide groove 202. A lifting drive mechanism for the unloading gate is also provided on the side wall of the rectangular opening. The lifting drive mechanism for the unloading gate includes a lifting drive motor 231, a gear 232, and a rack 233. The rack 233 is vertically fixed to the outer side wall of the unloading gate 201. The lifting drive motor 231 is fixedly installed on the side wall of the rectangular opening. The output end of the lifting drive motor 231 is connected to a gear 232, and the gear 232 meshes with the rack 233.

[0028] Reference Figure 3 and Figure 4 Once the coffee beans or nuts in the first drying chamber are dried, the air inlet duct is opened from bottom to top, causing it to rotate around a pivot. The piston rod of the cylinder extends to keep the air inlet duct open. Then, the lifting drive motor drives the gear to rotate, causing the rack meshing with the gear to move upward. Since the rack is fixed to the side wall of the discharge gate, the movement of the rack causes the discharge gate to rise, allowing the coffee beans or nuts to exit from the discharge port.

[0029] Reference Figure 2 The first drying chamber 20 is also provided with an exhaust gas outlet 24 on its side wall. The exhaust gas outlet 24 is connected to the heating chamber 10 through a recovery pipe 25 so as to recover the exhaust gas with heat generated in the first drying chamber 20 into the heating chamber 10 for reuse, thereby reducing energy consumption.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention. Those skilled in the art can easily make corresponding modifications or alterations based on the main concept and spirit of the present invention, such as arranging and combining the dependent claims or adding or modifying some conventional technical solutions. All equivalent changes and modifications made in accordance with the scope of the patent application and the content of the specification of this invention should still fall within the scope of the patent coverage of this invention.

Claims

1. A batch drying equipment for coffee beans and nuts, comprising a drying chamber and a heat pump heating device, wherein the top of the drying chamber is an open structure, and a first drying screen and a second drying screen are arranged at intervals from bottom to top inside the drying chamber, dividing the interior of the drying chamber into a heating chamber, a first drying chamber, and a second drying chamber, the heat pump heating device being installed in the heating chamber, and a discharge port being opened on the side wall of the first drying chamber, with a discharge door installed at the discharge port; characterized in that: It also includes an air inlet duct. Several axial flow fans are installed at intervals inside the heating chamber. At least one air inlet is opened on the side wall of the heating chamber. A portion of the upper part of the first drying chamber is reserved as an air inlet chamber. At least one air inlet is provided on the side wall of this air inlet chamber. The air inlet and the air duct are connected. A rectangular opening is opened on the lower side wall of the first drying chamber and the upper side wall of the heating chamber. The upper part of this rectangular opening forms the air inlet, the middle part forms the discharge port, and the lower part forms the air duct. The discharge port and the air duct... The openings are separated by a partition, the top surface of which is aligned with the top surface of the first drying screen. The air inlet duct consists of a duct body and a mounting frame. The mounting frame is fixedly embedded in the edge of the rectangular opening. The top of the duct body is rotatably hinged to the top of the mounting frame. The two ends of the duct body are respectively hinged to the two sides of the mounting frame via a cylinder. The duct body has an air inlet and an air outlet on the same side. The air inlet is connected to the air vent, and the air outlet is connected to the air inlet.

2. The batch drying equipment for coffee beans and nuts as described in claim 1, characterized in that: A vertical guide groove is provided on each side of the rectangular opening, and the two sides of the unloading gate are respectively provided in the vertical guide groove. A lifting drive mechanism for the unloading gate is also provided on the side wall of the rectangular opening.

3. The batch drying equipment for coffee beans and nuts as described in claim 2, characterized in that: The unloading gate lifting drive mechanism includes a lifting drive motor, a rack and a gear. The rack is vertically fixed to the outer side wall of the unloading gate. The lifting drive motor is fixedly installed on the side wall of the rectangular opening. The output end of the lifting drive motor is connected to a gear, and the gear meshes with the rack.

4. The batch drying equipment for coffee beans and nuts as described in claim 1, characterized in that: The first drying chamber is also provided with an exhaust gas outlet on its side wall, which is connected to the heating chamber through a recovery pipeline.

5. The batch drying equipment for coffee beans and nuts as described in claim 1, characterized in that: The second drying screen has a feeding port, at which a feeding plate is rotatably connected.

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