Multifunctional complementary heat source type drying machine and material trolley thereof

Abstract

The invention provides a multifunctional complementary heat source type drying machine and a material trolley thereof, and relates to the field of agricultural product drying machines, the multifunctional complementary heat source type drying machine comprises a box body, a heating system, an air circulation system, a detection system, a control system and the material trolley, the box body is divided into a left air chamber and a right air chamber through the carbon fiber far infrared heating plate, and a heating system for drying materials, a visual monitoring unit for detecting the appearance of the materials, a weighing unit for detecting the weight of the materials and a material trolley for containing the materials are installed in the box body. The problems of slow temperature rise and low drying efficiency in the early stage of drying under a single heat source can be solved, the medium-short wave infrared lamp and the carbon fiber far infrared plate are adopted, the surface of a material can be efficiently penetrated, the interior of the material is heated, rapid temperature rise of the material and the box body can be achieved through complementary heat source coupling in the early stage of drying, and the drying efficiency is effectively improved.

Description

Technical Field

[0001] The invention relates to the field of agricultural product dryers, and in particular to a multifunctional complementary heat source dryer and a material trolley thereof. Background Art

[0002] There are a wide variety of agricultural products in my country, among which granular crops such as soybeans, peanuts, sorghum, and corn are often affected by rainy and humid weather, resulting in product corruption and mildew from time to time, which poses a serious threat to the yield and quality of agricultural products. Mechanical drying is a way to process agricultural products in large quantities and with high efficiency. With the growing demand for drying in society, drying equipment and technology have been greatly developed. Common drying technologies can be divided into hot air drying, heat pump drying, freeze drying, infrared drying, microwave drying, etc. Among them, air energy heat pump is a very mature drying technology, which makes full use of the heat in the air to meet the heating needs with the least energy consumption. Air energy heat pump drying technology has the advantages of energy saving, easy maintenance, and long service life. Drying equipment often consumes a lot of energy and the equipment operation cost is expensive. The advantages of air energy heat pump technology in energy saving make it widely used in the field of drying. However, there are limitations to using a single heat source for heating. Because the drying equipment has a large space and the heat pump heats up slowly, the equipment needs to be preheated for a long time to reach the set temperature. In addition, the hot air drying provided by the heat pump has a poor effect on the migration of moisture inside the material, resulting in a long drying time in the later stage. To solve the above problems, relevant scholars have developed complementary heat source drying equipment, which combines infrared radiation with hot air drying. On the one hand, hot air is used to quickly remove the shallow moisture of the material, and on the other hand, infrared radiation is used to increase the internal temperature of the material, which can achieve rapid drying of agricultural products. However, the existing drying equipment has a single function, only a single dehumidification drying, which cannot meet the monitoring of the moisture content and appearance color of the material. However, the quality of the color of some materials directly affects the market value. Therefore, in order to obtain high-quality dried products, it is necessary to monitor the materials during the drying process. In addition, the existing heat pump drying equipment mostly uses a horizontally placed loading tray to lay the material flat on the tray for drying. This method has a good drying effect on flaky materials, but for granular materials, the drying medium only contacts the surface of the material, and the drying effect is not good. Not only that, this method also has problems such as low loading capacity and time-consuming and labor-intensive loading. Therefore, a trolley for granular materials is needed to improve the drying effect and reduce labor intensity.

[0003] The Chinese invention patent with the publication number CN113498872A discloses a far-infrared combined heat pump drying device, including a box, a heating unit, a dehumidification unit and an air circulation unit, wherein the heating unit is installed in the box through a material drying rack, the dehumidification unit is installed on one side of the box and the dehumidification unit matches the heating unit, and the air circulation unit passes through the heating unit and the dehumidification unit in sequence and the air circulation units are connected end to end to form a circulation path. The combined drying device combines heat pump drying and far-infrared radiation drying methods, and multiple drying devices are arranged in the drying device. The drying program is adjusted according to the change of the wet basis moisture content of peanuts in a segmented drying method. The drying speed is fast, the energy consumption is low, the drying efficiency is greatly improved, and the safety of the dried peanuts is high.

[0004] The Chinese utility model patent with the publication number CN217826591U discloses a granular material drying cart, including a material rack frame, a plurality of loading troughs arranged side by side in the horizontal direction are arranged in the material rack frame, a ventilation channel is arranged between two adjacent loading troughs, and a bottom plate that can be opened and closed is arranged at the bottom of the loading trough. The drying cart is convenient for loading and unloading when drying granular materials such as peanuts and soybeans, and has strong replaceability, which can increase the utilization rate of the horizontal flow heat pump dryer; the bottom pull-out bottom plate is used when the drying cart is unloading, which is convenient to open and unload quickly, and the unloading guide plate can guide the material to the conveyor belt, which is convenient for the transportation of the dried material; when loading the drying cart, the material is directly poured on the top of the drying cart, and the material enters the loading trough under the action of the inverted V-shaped guide plate, and the loading of the drying cart is convenient and fast.

[0005] However, in the existing technology, there is a lack of monitoring of the weight and apparent quality of the material during the dehumidification and drying process, which leads to poor quality of the dried products or frequent over-drying, thereby reducing the economic value of the dried products. In addition, the air duct of the existing material truck is straight, and a large amount of hot air can only contact the surface of the material, and does not fully heat the material, which is inefficient and energy-unfriendly.

[0006] Therefore, we made improvements on this and proposed a multifunctional complementary heat source dryer and its material trolley. Summary of the invention

[0007] The object of the present invention is to provide a multifunctional complementary heat source dryer and a material trolley thereof, which solves the problem that the weight and apparent quality of the material are lacking to be monitored during the dehumidification and drying process, thereby resulting in poor quality of the dried product or over-drying, thereby reducing the economic value of the dried product; in addition, the air duct of the existing material trolley is straight, a large amount of hot air can only contact the surface of the material, and the material is not fully heated, resulting in low efficiency and being energy unfriendly.

[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0009] A multifunctional complementary heat source dryer, comprising a box, a heating system, an air circulation system, a detection system, a control system and a material trolley, wherein the box is in a rectangular cube shape, and a carbon fiber far-infrared heating plate is arranged in the middle of the box, and the carbon fiber far-infrared heating plate divides the box into two left and right wind chambers, and a heating system for drying materials, a visual monitoring unit for detecting the appearance of materials, a weighing unit for detecting the weight of materials and a material trolley for holding materials are installed inside the box; the heating system comprises a heat pump heating unit, a medium- and short-wave infrared heating unit and a carbon fiber far-infrared heating unit, and the heating system is used to increase the temperature inside the box; the heat pump heating unit comprises an air energy heat pump unit, and the air energy heat pump unit is installed at the rear of the box, and the air circulation system comprises An axial flow fan is installed on the inner wall of the box and a dehumidification fan is installed on the top of the box; the axial flow fan is installed on the inner wall of the box, and the air energy heat pump unit is connected to the axial flow fan, a dehumidification fan is installed in the middle position of the top of the box, and a temperature and humidity sensor is installed on the top of the box near the air outlet. The axial flow fans are evenly distributed in the left and right wind chambers and can be reversed to achieve circulation of the air duct inside the box; the dehumidification fan starts dehumidification when the humidity inside the box is higher than the set value, and a control system is installed on the outside of the box, the control system is installed in the electric control cabinet, and a control panel is installed on the surface of the electric control cabinet, and the control panel is electrically connected to the air energy heat pump unit, the axial flow fan, the dehumidification fan, the medium and short wave infrared heating unit, and the carbon fiber far-infrared heating unit through wires.

[0010] As a further solution of the present invention, the air energy heat pump unit includes an evaporator, a compressor, a condenser and an expansion valve; the compressor is connected in series with the evaporator, the condenser and the expansion valve through a pipeline, and the condenser is used to liquefy the high-temperature and high-pressure gas and use the heat released to heat the air as the main heat source of the dryer.

[0011] The medium- and short-wave infrared heating unit is composed of a medium- and short-wave infrared tungsten filament lamp. The medium- and short-wave infrared tungsten filament lamp includes a tungsten filament infrared bulb and a lamp holder. The tungsten filament infrared bulb is installed on the lamp holder, and the lamp holder is fixedly connected to the box body through a fastener.

[0012] As a further solution of the present invention, the carbon fiber far-infrared heating unit is composed of a carbon fiber far-infrared heating plate, which includes a carbon fiber electric heating element and an aluminum substrate. The carbon fiber electric heating element is evenly distributed on the aluminum substrate, and the aluminum substrate is provided with an insulating layer and an electrical connection interface.

[0013] As a further solution of the present invention, the detection system includes a visual detection unit and a weight detection unit. The visual detection unit includes a camera. A transparent protective cover is provided on the outside of the camera. The camera is installed in the transparent protective cover. A movable camera base is provided at the bottom of the camera, and the camera base is adapted to a slide groove on the inner wall of the box.

[0014] As a further solution of the present invention, the weight detection unit includes a weighing sensor embedded in the bottom of the box.

[0015] A material trolley for a multifunctional complementary heat source dryer, the material trolley comprises a stainless steel mesh surface for loading materials, a discharge draw plate and a guide plate, a universal wheel is provided at the bottom of the material trolley, and a locking mechanism is provided on the universal wheel, the guide plate is fixed under the discharge draw plate, the middle of the guide plate is raised, and the flow is diverted to the left and right sides of the material trolley;

[0016] As a further solution of the present invention, the stainless steel mesh divides the material cart into two areas, namely the loading area and the air duct area. The air duct area is a tortuous path. There is a sloped baffle above the air duct area. The sloped baffle can effectively prevent the material from falling into the air duct area and guide the material into the loading area.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can solve the problem of slow temperature rise and low drying efficiency in the early stage of drying under a single heat source. The medium and short wave infrared lamps and carbon fiber far infrared panels can efficiently penetrate the surface of the material and heat the inside. The complementary heat source coupling in the early stage of drying can realize rapid temperature rise of the material and the box, effectively improving the drying efficiency.

[0019] 2. The present invention is provided with a visual detection unit, and its camera is in a transparent protective cover, which is conducive to isolating the damage of the temperature in the box to the electronic devices. In addition, the base of the camera is movable, and it moves horizontally in the slot opened in the box, which can realize the monitoring of the material situation in the whole box, which is conducive to improving the apparent quality of the dried product and enhancing its economic value;

[0020] 3. The weighing sensor in the present invention can weigh the weight of the material in real time, which can effectively avoid the loss caused by excessive drying of the product;

[0021] 4. The present invention can increase the loading capacity of materials, improve the drying effect of granular materials, and save labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] Figure 2 It is a left side cross-sectional schematic diagram of the present invention.

[0024] Figure 3 It is a schematic diagram of the structure of the medium and short wave infrared tungsten filament lamp of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the carbon fiber far-infrared heating plate in the present invention.

[0026] Figure 5 Schematic diagram of the visual monitoring camera in the present invention.

[0027] Figure 6 It is a schematic diagram of the material trolley in the present invention.

[0028] In the figure, 1-box, 2-electric control cabinet, 3. Camera, 31-transparent protective cover, 32-camera lens, 33-camera base, 4-dehumidification fan, 5-carbon fiber far-infrared heating plate, 51-carbon fiber electric heating element, 52-aluminum base plate, 54-power connection interface, 6-axial flow fan, 7-temperature and humidity sensor, 8-medium and short wave infrared tungsten filament lamp, 81-medium and short wave infrared tungsten filament bulb, 82-lamp holder, 9-material trolley, 91-stainless steel mesh, 92-discharging drawer, 93-guide plate, 10-weighing sensor, 11-heat pump unit. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0030] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1-Figure 6As shown, a multifunctional complementary heat source dryer includes a box 1, a heating system, an air circulation system, a detection system, a control system and a material trolley 9. The box 1 is a rectangular cube. The box 1 provides a stable installation position and support for other components on the dryer, and also gives the dryer good heat preservation ability, effectively saving the energy consumption of the equipment. A carbon fiber far-infrared heating plate 5 is arranged in the middle position of the box 1. The carbon fiber far-infrared heating plate 5 divides the box 1 into two left and right wind chambers. A heating system for drying materials, a visual monitoring unit for detecting the appearance of materials, a weighing unit for detecting the weight of materials, and a material trolley 9 for holding materials are installed inside the box 1; the heating system includes a heat pump heating unit, a medium- and short-wave infrared heating unit, and a carbon fiber far-infrared heating unit. The heat pump heating unit is the main heat source of the equipment, and the medium- and short-wave infrared heating unit is the auxiliary heat source of the equipment, which can help the rapid increase of the temperature in the box in the early stage, and the carbon fiber far-infrared heating unit helps the moisture inside the material to migrate outward. The heating system is used to increase the temperature inside the box; the heat pump heating unit includes an air energy heat pump unit 11, which is installed at the rear of the box 1. The air circulation system includes an axial flow fan 6 installed on the inner wall of the box 1 and a dehumidification fan 4 installed on the top of the box 1; the inner wall of the box 1 is installed with an axial flow fan 6, and the air energy heat pump unit 11 is connected to the axial flow fan 6. The dehumidification fan 4 is installed in the middle position of the top of the box 1, and a temperature and humidity sensor is installed at one end of the top of the box 1 near the air outlet. Device 7, the axial flow fan 6 is evenly distributed in the left and right wind chambers, and can realize forward and reverse rotation to realize the circulation of the air duct inside the box 1; the dehumidification fan 4 starts dehumidification when the humidity inside the box 1 is higher than the set value, and a control system is installed on the outside of the box 1, and the control system is installed in the electric control cabinet 2, and a control panel is installed on the surface of the electric control cabinet, and the control panel is electrically connected to the air energy heat pump unit 11, the axial flow fan 6, the dehumidification fan 4, the medium and short wave infrared heating unit, and the carbon fiber far infrared heating unit through wires.

[0033] First, fill the material cart with the materials to be dried, then open the door and push the material cart into the dryer. Then turn on the heat pump unit and the axial flow fan. The heat pump unit will absorb the heat energy in the air and provide a heat source for the box. The axial flow fan is connected to the heat pump unit and blows its heat into the box in the form of hot air. As the hot air flow is pumped in, the surface moisture of the material in the material cart evaporates quickly and is gradually dried. After the crops are dried, turn off the heat pump unit and the fan, open the door of the box, and push out the material cart to obtain the dried product.

[0034] Example 2

[0035] Based on Example 1, the air energy heat pump unit 11 includes an evaporator, a compressor, a condenser and an expansion valve; the compressor is connected in series with the evaporator, the condenser and the expansion valve through a pipeline, and the condenser is used to liquefy high-temperature and high-pressure gas and use the heat released to heat the air as the main heat source of the dryer.

[0036] Example 3

[0037] On the basis of Example 2, the medium- and short-wave infrared heating unit is composed of a medium- and short-wave infrared tungsten filament lamp 8, which is installed on the wall of the box 1. The medium- and short-wave infrared tungsten filament lamp 8 includes a tungsten filament infrared bulb 81 and a lamp holder 82. The tungsten filament infrared bulb 81 is installed on the lamp holder 82, and the lamp holder 82 is fixedly connected to the box 1 through fasteners. In this example, a total of 8 medium- and short-wave infrared tungsten filament lamps are provided, and 4 are evenly arranged on the left and right walls respectively. The surface temperature of the material can be quickly increased by medium- and short-wave infrared heating. In addition, medium- and short-wave infrared heating has good penetration performance and can heat the inside of the material to achieve a rapid drying effect.

[0038] Example 4

[0039] On the basis of Example 3, the carbon fiber far-infrared heating unit is composed of a carbon fiber far-infrared heating plate 5, which includes a carbon fiber electric heating element 51 and an aluminum substrate 52. The carbon fiber electric heating element 51 is evenly distributed on the aluminum substrate 52. The aluminum substrate 52 is provided with an insulating layer 53 and an electrical connection interface 54. The carbon fiber electric heating element 51 emits far-infrared radiation to evenly heat the air and materials in the box. The working voltage of the carbon fiber electric heating element 51 is 220V and the power is 300W. The thickness of the aluminum substrate 52 is 2mm, and the far-infrared radiation wavelength is 5-15 microns.

[0040] Example 5

[0041] On the basis of Example 4, the detection system includes a visual detection unit and a weight detection unit. The visual detection unit includes a camera 3. A transparent protective cover 31 is provided on the outside of the camera 3. The camera 3 is installed in the transparent protective cover 31. A movable camera base 33 is provided at the bottom of the camera 3. The camera base 33 is adapted to the inner wall slide groove of the box body 1. In this example, in order to solve the problem that some materials may change in apparent color at high temperatures, affecting the quality of dry products and reducing their commercial value, a camera 3 for visual detection is provided, and its camera base 33 translates in the slot to monitor the changes of materials in the box body.

[0042] Example 6

[0043] Based on Example 5, the weight detection unit includes a weighing sensor 10 embedded in the bottom of the box body 1. The weighing sensors 10 are evenly distributed on the bottom of the box body 1. In this example, the maximum load capacity of the weighing sensor 10 is 2000Kg, which can be used to weigh the weight of the material to avoid economic losses caused by excessive drying.

[0044] Example 7

[0045] On the basis of Example 6, the material cart 9 includes a stainless steel mesh surface 91 for loading materials, a discharge drawer plate 92 and a guide plate 93. A universal wheel 94 is provided at the bottom of the material cart 9, and the universal wheel 94 is provided with a locking mechanism. The guide plate 93 is fixed under the discharge drawer plate 92. The middle of the guide plate 93 is raised to divert the material to the left and right sides of the material cart 9. The stainless steel mesh surface 91 divides the material cart 9 into two areas, namely the loading area and the air duct area. The air duct area is a tortuous path. There is a bevel baffle 94 above the air duct area. The bevel baffle 94 can effectively prevent the material from falling into the air duct area and guide the material into the loading area.

[0046] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A multifunctional complementary heat source dryer, comprising a housing (1), a heating system, an air circulation system, a detection system, a control system and a material trolley (9), characterized in that: The box (1) is in the shape of a rectangular cube. A carbon fiber far-infrared heating plate (5) is arranged in the middle of the box (1). The carbon fiber far-infrared heating plate (5) divides the box (1) into two left and right wind chambers. A heating system for drying materials, a visual monitoring unit for detecting the appearance of materials, a weighing unit for detecting the weight of materials, and a material trolley (9) for holding materials are installed inside the box (1); the heating system includes a heat pump heating unit, a medium- and short-wave infrared heating unit, and a carbon fiber far-infrared heating unit. The heating system is used to increase the temperature inside the box; the heat pump heating unit includes an air energy heat pump unit (11), and the air energy heat pump unit (11) is installed at the rear of the box (1). The air circulation system includes an axial flow fan (6) installed on the inner wall of the box (1) and a dehumidification fan (4) installed on the top of the box (1); the box An axial flow fan (6) is installed on the inner wall of the box (1), and the air energy heat pump unit (11) is connected to the axial flow fan (6). A dehumidification fan (4) is installed in the middle position of the top of the box (1), and a temperature and humidity sensor (7) is installed at the end of the top of the box (1) close to the air outlet. The axial flow fans (6) are evenly distributed in the left and right wind chambers and can realize forward and reverse rotation to realize the circulation of the air duct inside the box (1); the dehumidification fan (4) starts to dehumidify when the humidity inside the box (1) is higher than a set value. A control system is installed outside the box (1), and the control system is installed in the electric control cabinet (2). A control panel is installed on the surface of the electric control cabinet. The control panel is electrically connected to the air energy heat pump unit (11), the axial flow fan (6), the dehumidification fan (4), the medium and short wave infrared heating unit, and the carbon fiber far infrared heating unit through wires.

2. The multifunctional complementary heat source dryer according to claim 1, characterized in that: The air energy heat pump unit (11) comprises an evaporator, a compressor, a condenser and an expansion valve; the compressor is connected in series with the evaporator, the condenser and the expansion valve through a pipeline; the condenser is used to liquefy high-temperature and high-pressure gas and utilize the heat released to heat the air as the main heat source of the dryer.

3. The multifunctional complementary heat source dryer according to claim 1, characterized in that: The medium- and short-wave infrared heating unit is composed of a medium- and short-wave infrared tungsten filament lamp (8), which comprises a tungsten filament infrared bulb (81) and a lamp holder (82). The tungsten filament infrared bulb (81) is mounted on the lamp holder (82), and the lamp holder (82) is fixedly connected to the box (1) via a fastener.

4. The multifunctional complementary heat source dryer according to claim 1, characterized in that: The carbon fiber far-infrared heating unit is composed of a carbon fiber far-infrared heating plate (5), the carbon fiber far-infrared heating plate (5) comprising a carbon fiber electric heating element (51) and an aluminum substrate (52), the carbon fiber electric heating element (51) being evenly distributed on the aluminum substrate (52), and the aluminum substrate (52) being provided with an insulating layer (53) and an electrical connection interface (54).

5. The multifunctional complementary heat source dryer according to claim 1, characterized in that: The detection system comprises a visual detection unit and a weight detection unit, wherein the visual detection unit comprises a camera (3), a transparent protective cover (31) is provided outside the camera (3), the camera (3) is installed inside the transparent protective cover (31), a movable camera base (33) is provided at the bottom of the camera (3), and the camera base (33) is adapted to a sliding groove on the inner wall of a box body (1).

6. The multifunctional complementary heat source dryer according to claim 5, characterized in that: The weight detection unit comprises a weighing sensor (10) embedded in the bottom of the box (1), and the moisture content of the material at different weights can be obtained according to the initial moisture content and the weight detection unit.

7. A material trolley for the multifunctional complementary heat source dryer according to any one of claims 1 to 6, characterized in that: The material trolley (9) comprises a stainless steel mesh surface (91) for loading materials, a material discharge draw plate (92) and a guide plate (93). A universal wheel (94) is provided at the bottom of the material trolley (9), and the universal wheel (94) is provided with a locking mechanism. The guide plate (93) is fixed below the material discharge draw plate (92). The middle of the guide plate (93) is raised to divert the material to the left and right sides of the material trolley (9).

8. The material trolley according to claim 7, characterized in that: The stainless steel mesh surface (91) divides the material trolley (9) into two areas, namely a loading area and an air duct area. The air duct area is a zigzag path. There is an inclined baffle (94) above the air duct area. The inclined baffle (94) can effectively prevent the material from falling into the air duct area and guide the material into the loading area.

Images