A dryer having multi-damper control drying

Abstract

The utility model relates to drying equipment technical field, especially a kind of drying machine with multiple damper control drying, including drying machine body and circulating drying frame, and heat recovery ware, heater, circulating fan and drying chamber are arranged in the inside of drying machine body along the direction of new air flow;The side wall of the drying chamber is equipped with inner circulation air door and outer circulation air door for air outlet;The circulating drying frame includes rack and the circulating motor being set on rack, circulating chain and drying disc, the circulating drying frame bottom is equipped with gyro wheel.The utility model has beneficial effect: in the drying machine with multiple damper control drying of the utility model, multiple damper can be according to high, medium, low humidity stage of drying process, intelligent switching full heat exchange, simple circulation and inner circulation three modes, dynamic optimization heat recovery and moisture balance, significantly reduce energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to a dryer with multi-door drying control. Background Technology

[0002] Fruit and vegetable drying is a crucial step in agricultural product processing, effectively extending shelf life, reducing transportation costs, and preserving nutrients. A fruit and vegetable dryer is a highly efficient device for removing moisture from fruits and vegetables, primarily composed of a drying chamber, circulating fan, heater, and control system. Its core principle is dehydration through hot air convection and moisture evaporation. Generally, an air-source heat pump heats the drying chamber, and the dryer uses trolley-style drying racks. The working principle involves activating the control system and starting the heat pump heater to heat the air. The circulating fan drives the hot air to circulate within the drying chamber, drying the items. After drying, the trolley is pushed out, and each rack is manually inspected. If any items are not completely dried, they are reheated and dried until fully dehydrated. However, existing air-source heat pump fruit and vegetable dryers lack a controllable heat recovery device during the drying stage, resulting in a large amount of hot, humid air being directly discharged into the air, leading to inefficient heat utilization and relatively low drying efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a dryer with high drying efficiency and uniform drying, and with multi-door drying control.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a dryer with multi-door control drying is provided, including a dryer body and a circulating drying frame, as well as a heat recovery unit, a heater, a circulating fan and a drying chamber arranged inside the dryer body along the fresh air flow direction; The drying chamber is equipped with an internal circulation damper and an external circulation damper on its side wall for air outlet; the internal circulation damper is connected to the heater pipe through an air duct, and the external circulation damper is connected to the air inlet pipe of the heat recovery unit through a circulation air duct; the air outlet of the heat recovery unit is equipped with a first air outlet for discharging waste gas; a hidden push-pull damper and a second air outlet are sequentially provided on the circulation air duct. The circulating drying frame includes a frame and a circulating motor, a circulating chain, and a drying tray mounted on the frame; the circulating motor drives the circulating chain to circulate vertically, the drying tray is fixed horizontally on the circulating chain, and the bottom of the circulating drying frame is equipped with rollers.

[0005] Furthermore, in the aforementioned dryer with multi-door drying control, the heat recovery unit is a detachable plate-fin total heat exchanger, which is fixed in the fresh air intake duct of the dryer body by quick-release buckles.

[0006] Furthermore, in the aforementioned dryer with multi-door drying control, there are two circulating chains arranged in parallel on both sides of the frame; the two ends of the drying tray are connected to the two circulating chains respectively by pins.

[0007] Furthermore, in the aforementioned dryer with multi-door drying control, the circulating drying frame also includes multiple horizontal driven shafts mounted on the frame. Each driven shaft is equipped with a driven sprocket. The circulating motor includes a driving sprocket, which drives the driven sprockets via a transmission chain. The driven sprockets drive the circulating chain to circulate in the vertical direction.

[0008] Furthermore, in the aforementioned dryer with multi-door control drying, the driven shaft is provided with two driven sprockets, and there are two circulating chains, with the two driven sprockets driving a corresponding circulating chain.

[0009] Furthermore, in the aforementioned dryer with multi-door drying control, the circulating motor is a permanent magnet synchronous motor.

[0010] Furthermore, in the aforementioned dryer with multi-door drying control, a blower is provided on the pipe between the heat recovery unit and the heater along the fresh air flow direction.

[0011] Furthermore, in the aforementioned dryer with multi-door drying control, the inner wall of the drying chamber is provided with a heat insulation layer.

[0012] Furthermore, in the aforementioned dryer with multi-door drying control, an image recognition device is provided in the drying chamber, which is used to identify the items being dried in the current drying tray.

[0013] The aforementioned image recognition device allows for timely adjustment of the drying position when the drying process is insufficient, eliminating the need to open the drying chamber door and thus preventing heat loss.

[0014] Furthermore, in the aforementioned dryer with multi-door drying control, a temperature and humidity sensor is also provided in the drying chamber.

[0015] The beneficial effects of this utility model are as follows: In the dryer with multi-damper control, the multiple dampers can intelligently switch between three modes—total heat exchange, simple circulation, and internal circulation—according to the high, medium, and low humidity stages of the drying process, dynamically optimizing heat recovery and dehumidification balance, and significantly reducing energy consumption. The vertical circulation drying design ensures continuous vertical movement of the material tray, completely eliminating hot air dead zones, ensuring drying uniformity, and greatly improving product qualification rate. The modular design of the movable frame greatly facilitates material loading and unloading and equipment maintenance, supports assembly line operations, and effectively improves production efficiency. This solution comprehensively overcomes the pain points of low energy efficiency, poor uniformity, and inconvenient operation of traditional equipment, resulting in significant overall benefits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a dryer with multi-door drying control according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a dryer with multi-door drying control according to a specific embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the structure of a circulating drying frame of a dryer with multi-door drying control, which is a specific embodiment of the present invention. Figure 5 for Figure 4 Enlarged view of point B; Label Explanation: 1. Heat recovery unit; 2. Heater; 3. Circulating fan; 4. Drying chamber; 41. Internal circulation damper; 42. External circulation damper; 5. First air outlet; 6. Concealed sliding damper; 7. Second air outlet; 8. Circulating drying rack; 81. Circulating motor; 82. Circulating chain; 83. Drying tray; 84. Driven shaft; 85. Driving sprocket; 86. Driven sprocket; 9. Blower; 10. Image recognition device. Detailed Implementation

[0017] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0018] Traditional fixed-rack dryers have dead zones in hot air circulation, resulting in some materials being over-dried while others remain undried. Furthermore, the high-temperature, high-humidity exhaust gases are directly released into the atmosphere, causing significant energy waste. Although some equipment attempts to incorporate heat recovery devices, the recovery methods are limited and the drying efficiency is low.

[0019] Please refer to Figures 1 to 3 This utility model provides a dryer with multi-door control drying, characterized in that it includes a dryer body and a circulating drying frame 8, as well as a heat recovery unit 1, a heater 2, a circulating fan 3 and a drying chamber 4 arranged inside the dryer body along the fresh air flow direction; The drying chamber 4 is provided with an internal circulation damper 41 and an external circulation damper 42 on its side wall for air outlet; the internal circulation damper 41 is connected to the heater 2 pipe through the air duct, and the external circulation damper 42 is connected to the air inlet pipe of the heat recovery unit 1 through the circulation air duct; the air outlet of the heat recovery unit 1 is provided with a first air outlet 5 for discharging waste gas; a hidden push-pull damper 6 and a second air outlet 7 are provided in sequence on the circulation air duct. The circulating drying frame 8 includes a frame and a circulating motor 81, a circulating chain 82 and a drying tray 83 mounted on the frame; the circulating motor 81 drives the circulating chain 82 to circulate in the vertical direction, the drying tray 83 is fixed horizontally on the circulating chain 82, and the bottom of the circulating drying frame 8 is provided with rollers.

[0020] The beneficial effects of this utility model are as follows: In the dryer with multi-damper control, the multiple dampers can intelligently switch between three modes—total heat exchange, simple circulation, and internal circulation—according to the high, medium, and low humidity stages of the drying process, dynamically optimizing heat recovery and dehumidification balance, and significantly reducing energy consumption. The vertical circulation drying design ensures continuous vertical movement of the material tray, completely eliminating hot air dead zones, ensuring drying uniformity, and greatly improving product qualification rate. The modular design of the movable frame greatly facilitates material loading and unloading and equipment maintenance, supports assembly line operations, and effectively improves production efficiency. This solution comprehensively overcomes the pain points of low energy efficiency, poor uniformity, and inconvenient operation of traditional equipment, resulting in significant overall benefits.

[0021] Furthermore, in the aforementioned dryer with multi-door drying control, the heat recovery unit 1 is a detachable plate-fin total heat exchanger, which is fixed in the fresh air intake duct of the dryer body by quick-release buckles.

[0022] As described above, the aforementioned limitations facilitate the regular cleaning of dust and lint adhering to the surface of the heat recovery unit 1, maintaining high-efficiency heat exchange performance and solving the problem of decreased heat exchange efficiency after long-term use.

[0023] Please see Figure 4 and Figure 5 Furthermore, in the aforementioned dryer with multi-door drying control, two circulating chains 82 are provided, arranged in parallel on both sides of the frame; the two ends of the drying tray 83 are respectively connected to the two circulating chains 82 by pins.

[0024] As described above, the aforementioned double-chain structure ensures the smooth operation of the drying tray 83, avoids jamming caused by uneven force on one side, and improves system reliability.

[0025] Please see Figure 4 and Figure 5Furthermore, in the aforementioned dryer with multi-door drying control, the circulating drying frame 8 also includes a plurality of horizontally driven shafts 84 mounted on the frame. Each driven shaft 84 is equipped with a driven sprocket 86. The circulating motor 81 includes a drive sprocket 85. The drive sprocket 85 drives the driven sprocket 86 through a transmission chain. The driven sprocket 86 drives the circulating chain 82 to circulate in the vertical direction.

[0026] Furthermore, in the aforementioned dryer with multi-door control drying, the driven shaft 84 is provided with two driven sprockets 86, and the circulating chain 82 is provided with two sprockets, with the two driven sprockets 86 respectively driving a corresponding circulating chain 82.

[0027] Furthermore, in the aforementioned dryer with multi-door drying control, the circulating motor 81 is a permanent magnet synchronous motor.

[0028] Furthermore, in the aforementioned dryer with multi-door drying control, a blower 9 is provided on the pipe between the heat recovery unit 1 and the heater 2 along the fresh air flow direction.

[0029] Furthermore, in the aforementioned dryer with multi-door drying control, the inner wall of the drying chamber 4 is provided with a heat insulation layer.

[0030] As described above, the aforementioned limitations reduce heat loss from the drying chamber 4, thereby further improving the energy efficiency of the entire system.

[0031] Furthermore, in the aforementioned dryer with multi-door drying control, the drying chamber 4 is equipped with an image recognition device 10, which is used to identify the items being dried in the current drying tray 83.

[0032] As described above, the image recognition device 10 enables timely adjustment of the drying position when the drying degree is insufficient, without having to open the door of the drying chamber 4 and thus avoid heat loss.

[0033] Furthermore, in the aforementioned dryer with multi-door drying control, the drying chamber 4 is also equipped with a temperature and humidity sensor.

[0034] As described above, the drying status judgment provided by the temperature and humidity sensors provides a basis for controlling the drying process.

[0035] Example 1 Please see Figures 1 to 5 This embodiment provides a dryer with multi-door controlled drying, including a dryer body and a circulating drying frame 8, as well as a heat recovery unit 1, a heater 2, a circulating fan 3 and a drying chamber 4 arranged inside the dryer body along the fresh air flow direction; The drying chamber 4 is provided with an internal circulation damper 41 and an external circulation damper 42 on its side wall for air outlet; the internal circulation damper 41 is connected to the heater 2 pipe through the air duct, and the external circulation damper 42 is connected to the air inlet pipe of the heat recovery unit 1 through the circulation air duct; the air outlet of the heat recovery unit 1 is provided with a first air outlet 5 for discharging waste gas; a hidden push-pull damper 6 and a second air outlet 7 are provided in sequence on the circulation air duct. The circulating drying frame 8 includes a frame and a circulating motor 81, a circulating chain 82 and a drying tray 83 mounted on the frame; the circulating motor 81 drives the circulating chain 82 to circulate in the vertical direction, the drying tray 83 is fixed horizontally on the circulating chain 82, and the bottom of the circulating drying frame 8 is provided with rollers.

[0036] The heat recovery unit 1 is a detachable plate-fin type total heat exchanger, which is fixed in the air duct of the fresh air entering the dryer body by quick-release buckles.

[0037] Two circulating chains 82 are provided, arranged parallel to each other on both sides of the frame; the two ends of the drying tray 83 are connected to the two circulating chains 82 respectively by pins. The circulating drying cart 8 also includes multiple horizontal driven shafts 84 arranged on the frame, each driven shaft 84 having a driven sprocket 86. The circulating motor 81 includes a driving sprocket 85, which drives the driven sprocket 86 through a transmission chain. The driven sprocket 86 drives the circulating chains 82 to circulate vertically. Two driven sprockets 86 are provided on each driven shaft 84, and two circulating chains 82 are provided, with each driven sprocket 86 driving a corresponding circulating chain 82. The circulating motor 81 is a permanent magnet synchronous motor. A blower 9 is provided on the duct between the heat recovery unit 1 and the heater 2 along the fresh air flow direction.

[0038] The heater 2 includes an air-source heat pump and a condenser, giving the heater 2 both heating and condensing functions.

[0039] The above-mentioned dryer with multi-drum control drying is used as follows: The humidity value of the drying chamber 4 is preset to be divided into three ranges: high (humidity > 60%RH), medium (30%RH < humidity ≤ 60%RH), and low (humidity ≤ 30%RH). The humidity values ​​corresponding to the three ranges are selected in the following modes (or can be manually set): Total heat exchange mode: Close the second air outlet 7 and the internal circulation damper 41, open the concealed sliding damper 6, and open the external circulation damper 42. Fresh air enters the drying chamber 4 through the heat recovery unit 1, absorbing the hot and humid air discharged from the drying chamber 4. It then passes through the blower 9, heater 2, and circulating fan 3 in sequence to dry the items. The hot and humid air is discharged from the internal circulation damper 41 at the bottom of the drying chamber. Because the second air outlet 7 is closed and the sliding damper is open, the hot and humid air passes through the heat recovery unit 1 and is heated by the fresh air (heating the fresh air). Finally, it is discharged from the first air outlet 5.

[0040] Simple circulation mode: Open the second air outlet 7 and the external circulation damper 42, close the concealed sliding damper 6 and the internal circulation damper 41. Fresh air enters from the inlet and passes through the heat recovery unit 1. Since the hot and humid air does not pass through the heat recovery unit 1 but is directly discharged through the second air outlet, the fresh air is not heated. It then passes through the blower 9, heater 2, and circulating fan 3 into the drying chamber 4, and is discharged through the internal circulation damper 41 and the second air outlet 7 at the bottom of the drying chamber 4, completing a simple hot air circulation mode.

[0041] Internal circulation mode: When the humidity in the drying chamber 4 decreases from high to low and reaches a certain level, it enters the internal circulation mode. The concealed sliding damper 6, the second air outlet 7, and the external circulation damper 42 are closed. The air in the heating chamber of the heater 2 is heated by the heating element of the heater 2, blown into the drying chamber 4 by the circulating fan 3, and then returned to the heating chamber by the internal circulation damper 41, forming an internal circulation.

[0042] By removing the pipe from the first air outlet 5, the heat recovery unit 1 can be easily removed. Installing this unit enables waste heat recovery, achieving energy conservation and emission reduction. The heat recovery unit 1 is detachable. During prolonged use of the dryer, lint and dust will adhere to the surface of the recovery unit, minimizing its impact on the dryer's heater 2, thus providing the first layer of protection for the heater 2. The recovery unit is detachable and easy to clean. The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model's specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dryer with multi-drum controlled drying, characterized in that, It includes the dryer body and the circulating drying vehicle frame, as well as the heat recovery unit, heater, circulating fan and drying chamber installed inside the dryer body along the fresh air flow direction; The drying chamber is equipped with an internal circulation damper and an external circulation damper on its side wall for air outlet; the internal circulation damper is connected to the heater pipe through an air duct, and the external circulation damper is connected to the air inlet pipe of the heat recovery unit through a circulation air duct; the air outlet of the heat recovery unit is equipped with a first air outlet for discharging waste gas; a hidden push-pull damper and a second air outlet are sequentially provided on the circulation air duct. The circulating drying frame includes a frame and a circulating motor, a circulating chain, and a drying tray mounted on the frame; the circulating motor drives the circulating chain to circulate vertically, the drying tray is fixed horizontally on the circulating chain, and the bottom of the circulating drying frame is equipped with rollers.

2. The dryer with multi-drum controlled drying as described in claim 1, characterized in that, The heat recovery unit is a detachable plate-fin total heat exchanger, which is fixed in the air duct of the fresh air intake dryer body by quick-release buckles.

3. The dryer with multi-drum controlled drying as described in claim 2, characterized in that, The circulating chain has two parallel chains arranged on both sides of the frame; the two ends of the drying tray are connected to the two circulating chains respectively by pins.

4. The dryer with multi-drum controlled drying according to claim 2, characterized in that, The circulating drying frame also includes multiple horizontal driven shafts mounted on the frame. Each driven shaft is equipped with a driven sprocket. The circulating motor includes a driving sprocket. The driving sprocket drives the driven sprocket through a transmission chain. The driven sprocket drives the circulating chain to circulate in the vertical direction.

5. The dryer with multi-drum controlled drying according to claim 4, characterized in that, The driven shaft is provided with two driven sprockets, and there are two circulating chains. The two driven sprockets drive a corresponding circulating chain.

6. The dryer with multi-drum controlled drying according to claim 2, characterized in that, The circulating motor is a permanent magnet synchronous motor.

7. The dryer with multi-drum controlled drying according to claim 1, characterized in that, A blower is installed on the duct between the heat recovery unit and the heater along the direction of fresh air flow.

8. The dryer with multi-drum controlled drying according to claim 1, characterized in that, The inner wall of the drying chamber is provided with a heat insulation layer.

9. The dryer with multi-drum controlled drying as described in claim 1, characterized in that, The drying chamber is equipped with an image recognition device, which is used to identify the items being dried in the current drying tray.

10. The dryer with multi-drum controlled drying according to claim 1, characterized in that, The drying chamber is also equipped with temperature and humidity sensors.

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