Single-furnace dehumidification dryer

Abstract

The utility model relates to a single-furnace dehumidification dryer which comprises a drying box body, and the drying box body is divided into a drying chamber, a heating chamber and a dehumidification chamber through partition plates. The drying chamber is divided into an air inlet channel, a drying area and an air outlet channel through an air inlet partition plate and an air outlet partition plate. A dehumidifier is arranged in the dehumidification chamber, an inlet of the dehumidification chamber is communicated with the air outlet channel through an air inlet channel, and an outlet of the dehumidification chamber is communicated with the heating chamber air channel through an air outlet channel; a dehumidification valve is arranged in the air inlet duct; the interior of the heating chamber is divided into a heating area and a fan area through a fan partition plate. A heating device is arranged in the heating area; a fan is arranged in the fan area; a storage rack is arranged in the drying area, and a heating glass sheet is arranged below the storage rack. By means of three different stages of drying procedures, it can be guaranteed that dried objects are evenly heated to the maximum extent, and the drying quality of the materials is improved. Therefore, the original taste and nutritional ingredients of the dried materials such as the tea leaves are better reserved, and the quality of the product is better.

Description

Technical Field

[0001] This utility model relates to heating and drying equipment, and in particular to a single-furnace dehumidification dryer. Background Technology

[0002] Currently, most large-scale slow-drying ovens on the market use biomass fuel as the heating element. However, each of these heating technologies has its own unavoidable drawbacks. Biomass drying ovens are currently the most widely used, accounting for 60-75% of the market. Biomass fuel has the following disadvantages: biomass pellet fuel requires open flame combustion, generating air pollutants, water pollutants, and solid waste. It emits pollutants such as smoke, ash, SO2, and NOx, resulting in a dirty and unsanitary environment. Utility Model Content

[0003] The purpose of this invention is to provide a single-furnace dehumidification dryer that can ensure uniform heating of the dried material and improve the drying quality of the material.

[0004] This utility model is achieved through the following technical solution: a single-furnace dehumidification dryer, which includes a drying chamber, wherein the drying chamber is divided by a partition to form a drying chamber, a heating chamber and a dehumidification chamber;

[0005] The drying chamber is divided into an air inlet channel, a drying area, and an air outlet channel by an air inlet baffle and an air outlet baffle; wherein the air inlet channel is connected to the heating chamber, the air outlet channel is connected to the heating chamber, and both the air inlet baffle and the air outlet baffle are provided with several air passage holes;

[0006] The dehumidification chamber is equipped with a dehumidifier. The inlet of the dehumidification chamber is connected to the outlet air duct through the air inlet duct, and the outlet of the dehumidification chamber is connected to the air duct of the heating chamber through the air outlet duct. A dehumidification valve is installed in the air inlet duct.

[0007] The heating chamber is divided into a heating zone and a fan zone by a fan partition; the heating zone is equipped with a heating device, the heating zone is connected to the air inlet channel, and the side wall of the heating zone is equipped with an air inlet with an air inlet valve;

[0008] The fan area is equipped with a fan, which is mounted on a fan partition and has an exhaust port with an exhaust valve on its side wall; the fan area is connected to the air outlet channel and the air outlet duct.

[0009] The drying area is equipped with a shelf, and a heating glass plate is located below the shelf.

[0010] Compared with previous technologies, the beneficial effects of this utility model are as follows:

[0011] 1. Through three different stages of drying, the material can be heated evenly to the greatest extent, improving the quality of the dried material. This better preserves the original flavor and nutrients of dried materials such as tea, resulting in a higher quality product. Attached Figure Description

[0012] Figure 1 This is an overall perspective view of the present invention after the top cover has been removed;

[0013] Figure 2 This is an overall perspective view of the present invention;

[0014] Figure 3 This is a diagram showing the airflow direction under the internal circulation air drying mode;

[0015] Figure 4 This is a diagram showing the airflow direction under external circulation dehumidification mode;

[0016] Figure 5 This is a schematic diagram of the overall structure of the shelving unit;

[0017] Figure 6 This is a schematic diagram of the tray frame structure.

[0018] Labeling Explanation: 1 Drying Chamber, 11 Drying Room, 111 Air Inlet Channel, 112 Drying Area, 123 Fan Baffle, 113 Air Outlet Channel, 12 Heating Chamber, 121 Heating Zone, 122 Fan Zone, 123 Fan Baffle, 13 Dehumidification Chamber, 14 Baffle, 21 Air Inlet Baffle, 22 Air Outlet Baffle, 23 Air Through Hole, 3 Dehumidifier, 31 Air Inlet Duct, 32 Air Outlet Duct, 4 Heating Device, 41 Air Inlet, 5 Fan, 51 Air Outlet, 6 Shelf, 61 Rotating Shaft, 62 Tray, 63 Vertical Linkage, 621 Arc-shaped Rod, 622 First Linkage, 623 Second Linkage, 7 Heating Glass Plate, 81 Support Frame, 82 Wheels. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings:

[0020] like Figure 1-4 As shown: A single-furnace dehumidification dryer, which includes a drying chamber 1, wherein the drying chamber 1 is divided by a partition 14 to form a drying chamber 11, a heating chamber 12 and a dehumidification chamber 13;

[0021] The drying chamber 11 is divided into an air inlet channel 111, a drying area 112, and an air outlet channel 113 by an air inlet baffle 21 and an air outlet baffle 22; wherein the air inlet channel 111 is connected to the heating chamber 12, the air outlet channel 113 is connected to the heating chamber 12, and both the air inlet baffle 21 and the air outlet baffle 22 are provided with a number of air passage holes 23.

[0022] The dehumidification chamber 13 is equipped with a dehumidifier 3. The inlet of the dehumidification chamber 13 is connected to the outlet air passage 113 through the air inlet duct 31, and the outlet of the dehumidification chamber 13 is connected to the air passage of the heating chamber 12 through the air outlet duct 32. A dehumidification valve is provided in the air inlet duct 31.

[0023] The heating chamber 12 is divided into a heating zone 121 and a fan zone 122 by a fan partition 123; the heating zone 121 is equipped with a heating device 4, the heating zone 121 is connected to the air inlet channel 111 and the side wall of the heating zone 121 is equipped with an air inlet 41 with an air inlet valve;

[0024] The fan area 122 is equipped with a fan 5, which is mounted on the fan partition 123 and has an exhaust port 51 with an exhaust valve on its side wall; the fan area 122 is connected to the air outlet channel 113 and the air outlet duct 32.

[0025] The drying area 112 is equipped with a shelf 6, and a heating glass plate 7 is provided below the shelf 6.

[0026] The heating device includes a mounting frame and several heating glass panels, which are arranged in sequence at equal intervals and mounted on the mounting frame.

[0027] The drying chamber 1 here has the same structure as traditional chambers, with high-temperature resistant rock wool insulation board inside and food-grade 304 stainless steel material used to wrap and seal the outside of the chamber.

[0028] This invention utilizes semiconductor heating glass in both the heating element and the heating glass plate 7. It features high electrothermal conversion efficiency, reaching 98.77%, which is 26-46.5% more energy-efficient than traditional resistance wire heating. In use, drying 100 catties of semi-finished paper-packaged tea at 58 degrees Celsius takes only 14 hours, consuming only 42 kWh of electricity.

[0029] like Figure 5 , 6 As shown: The shelf 6 includes a rotating motor, a rotating shaft 61, several trays 62, and a vertical connecting rod 63. The tray 62 includes an arc-shaped rod 621, a first connecting rod 622, and a second connecting rod 623. The two ends of the arc-shaped rod 621 are connected by the first connecting rod 622. The first connecting rod 622 and the second connecting rod 623 are connected at 90° to each other, and one end of the second connecting rod 623 is connected to the arc-shaped rod 621.

[0030] Several trays 62 are arranged from top to bottom, and the two ends of the arc rod 621 and the other end of the second connecting rod 623 are connected by a vertical connecting rod 63; the intersection of the first connecting rod 622 and the second connecting rod 623 in the top and bottom trays 62 is connected to a rotating shaft 61, and the rotating shaft 61 is installed in the drying area 112. The rotating motor is installed outside the drying chamber 1 and its output shaft is connected to the rotating shaft 61.

[0031] It also includes a support frame 81, which is disposed below the dehumidifier 3.

[0032] It also includes wheels 82, which are located at the bottom of the drying chamber 1.

[0033] It also includes a cabinet door 83, and the heating chamber 12 has an opening on its side, with the cabinet door 83 installed at the opening.

[0034] It also includes a control mechanism 84, which connects to and controls the opening and closing of the dehumidification valve, the exhaust valve, the air inlet valve, as well as the starting and stopping of the heating device, the fan 5, the dehumidifier 3, and the rotating motor.

[0035] The control methods for a single-furnace dehumidification dryer are divided into low-temperature heat preservation drying mode, internal circulation air drying mode, and external circulation dehumidification mode.

[0036] In the low-temperature heat preservation and drying mode, the exhaust valve, air inlet valve, and dehumidification valve are all closed; at the same time, the heating device, fan 5, dehumidifier 3, and rotating motor are all turned off; the heating glass plate is turned on.

[0037] In this mode, the rotating motor drives the rack 6 to rotate, ensuring even heating of the dried material and improving its drying quality. A semiconductor heating glass plate is installed at the bottom of the drying chamber. When the tea drying temperature is in the low-temperature heat preservation stage, only the bottom heating glass plate needs to be turned on to achieve low-power heat preservation heating. The generated heat radiates evenly upwards from the bottom and all sides, maintaining a uniform temperature inside the drying chamber.

[0038] Specifically, the low-temperature drying mode is used after most of the tea leaves have been dried out, requiring a low-temperature drying period. During this time, the temperature doesn't need to be too high. We stop the high-power heating glass in the upper heating zone and activate the low-power heating glass below the tray rack to generate low-temperature heat through upward radiation circulation, thus achieving the required drying temperature. The main purpose is to save energy and electricity.

[0039] like Figure 3As shown: In the internal circulation air drying mode, the exhaust valve and the air inlet valve are closed, and the dehumidification valve is open; at the same time, the heating device, fan 5, dehumidifier 3, and rotating motor are all turned on, and the heating glass plate is closed; the fan 5 drives the air in the fan area 122 into the heating area 121, and sequentially flows through the air inlet channel 111, the drying area 112, the air outlet channel 113, the air inlet duct 31, the dehumidification chamber 13, and the air outlet duct 32 back to the fan area 122, thereby forming internal circulation air drying;

[0040] like Figure 4 As shown: In the internal circulation air drying mode, the drying temperature is 60 degrees Celsius to achieve low-temperature drying. The drying chamber 1 is in an internally enclosed state. After the fan heats the air in the heating zone 121, the air enters the drying area 112 through the air inlet channel 111. The air inlet baffle 21 is provided with air passage holes 23, and the number and position of the air passage holes 23 correspond one-to-one with each tray 62. This concentrates the heated air at the air passage holes 23, increasing the air pressure and evenly blowing it onto the drying material on each tray. This accelerates the material drying efficiency and the utilization rate of drying heat. The high-temperature, low-humidity hot air passes through the tray material and evaporates the material moisture into high-humidity steam. The steam is compressed by the dehumidifier to remove the internal moisture and return to low-temperature, low-humidity gas without losing its heat. Then, it is blown back into the heating device 4 by the fan for reheating and sent back to the drying chamber 1 for drying. This process is repeated to form an internal circulation drying and dehumidification effect. There is almost no heat loss during the dehumidification process, achieving a highly efficient and energy-saving dehumidification effect.

[0041] In the external circulation dehumidification mode, the exhaust valve and the air inlet valve are open, and the dehumidification valve is closed; at the same time, the heating device, the fan 5, and the rotating motor are all turned on; the dehumidifier 3 and the heating glass plate are closed; the fan 5 drives the airflow in the fan area 122 to be discharged from the exhaust port 51, and the corresponding outside air enters the heating area 121 through the air inlet 41. The heated air flows back to the fan area 122 in sequence through the air inlet channel 111, the drying area 112, and the air outlet channel 113, thus forming the external circulation dehumidification mode.

[0042] In the external circulation dehumidification mode, when the drying temperature exceeds 60 degrees Celsius, which is higher than the working temperature of this invention, the external circulation dehumidification mode is adopted. The dehumidification valve entering the dehumidifier is closed, while the exhaust valve and the air inlet valve are opened simultaneously. The fan blows dry air into the heating device 4 for heating, and then sends the high-temperature, low-humidity air into the heating zone 121 to dry the material. The resulting high-temperature, high-humidity air is then blown towards the exhaust port above the fan. Due to the low temperature of the high-temperature, high-humidity air, when it is blown towards the exhaust port 51 above the fan, it forms thermal convection with the internal airflow and is discharged from the exhaust port 51 on the side above the fan. The low-temperature air after the material is dried continues to be blown by the fan towards the heating device 4, while the denser, low-temperature, low-humidity dry air from outside is drawn into the heating device 4 from the air inlet 41 for heating. The pressure difference between the inside and outside of the airflow circulation in the drying chamber 1 forms the external circulation dehumidification mode.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-furnace dehumidifying dryer, characterized in that: It includes a drying chamber (1), which is divided by partitions to form a drying chamber (11), a heating chamber (12) and a dehumidification chamber (13). The drying chamber (11) is divided into an air inlet channel (111), a drying area (112), and an air outlet channel (113) by an air inlet baffle (21) and an air outlet baffle (22); wherein the air inlet channel (111) is connected to the heating chamber (12), the air outlet channel (113) is connected to the heating chamber (12), and both the air inlet baffle (21) and the air outlet baffle (22) are provided with a number of air passage holes (23); A dehumidifier (3) is installed in the dehumidification chamber (13). The inlet of the dehumidification chamber (13) is connected to the outlet air passage (113) through the air inlet duct (31), and the outlet of the dehumidification chamber (13) is connected to the air passage of the heating chamber (12) through the air outlet duct (32). A dehumidification valve is installed in the air inlet duct (31). The heating chamber (12) is divided into a heating zone (121) and a fan zone (122) by a fan partition (123); a heating device (4) is provided in the heating zone (121), the heating zone (121) is connected to the air inlet channel (111), and the side wall of the heating zone (121) is provided with an air inlet (41) with an air inlet valve. The fan area (122) is equipped with a fan (5), which is installed on the fan partition (123) and the fan side wall is equipped with an exhaust port (51) with an exhaust valve; the fan area (122) is connected to the air outlet channel (113) and the air outlet duct (32); A shelf (6) is provided in the drying area (112), and a heating glass plate (7) is provided below the shelf (6).

2. The single-furnace dehumidification dryer according to claim 1, characterized in that: The shelf (6) includes a rotating motor, a rotating shaft (61), several trays (62) and a vertical connecting rod (63). The tray (62) includes an arc-shaped rod (621), a first connecting rod (622) and a second connecting rod (623). The two ends of the arc-shaped rod (621) are connected by the first connecting rod (622). The first connecting rod (622) and the second connecting rod (623) are connected at 90° to each other, and one end of the second connecting rod (623) is connected to the arc-shaped rod (621). Several trays (62) are arranged from top to bottom and the two ends of the arc rod (621) and the other end of the second connecting rod (623) are connected by a vertical connecting rod (63); the first connecting rod (622) and the second connecting rod (623) in the top and bottom trays (62) are connected to a rotating shaft (61), and the rotating shaft (61) is installed in the drying area (112). The rotating motor is installed outside the drying box (1) and its output shaft is connected to the rotating shaft (61).

3. The single-furnace dehumidification dryer according to claim 1, characterized in that: It also includes a support frame (81) which is located below the dehumidifier (3).

4. The single-furnace dehumidification dryer according to claim 1, characterized in that: It also includes wheels (82) which are located at the bottom of the drying chamber (1).

5. The single-furnace dehumidification dryer according to claim 1, characterized in that: It also includes a cabinet door (83), and the heating chamber (12) has an opening on its side, with the cabinet door (83) installed at the opening.

6. The single-furnace dehumidification dryer according to claim 1, characterized in that: It also includes a control mechanism (84), which connects to and controls the opening and closing of the dehumidification valve, the exhaust valve, the air inlet valve, as well as the starting and stopping of the heating device, the fan (5), the dehumidifier (3), and the rotating motor.

7. The single-furnace dehumidification dryer according to claim 1, characterized in that: The heating device includes a mounting frame and several heating glass panels, which are arranged in sequence at equal intervals and mounted on the mounting frame.

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