Electric heating air blast dried fruit drying device

Abstract

The invention relates to the technical field of dried fruit processing, and discloses an electric hot air blast dried fruit drying device, comprising a centrifugal cylinder, a centrifugal turntable coaxially rotatingly arranged in the centrifugal cylinder, a driving shaft coaxially fixedly connected to the centrifugal turntable, a motor module arranged on the top of the driving shaft, an electric hot air blast module arranged at the bottom of the centrifugal cylinder, gas blown out by the electric hot air blast module flows along the spiral direction of the centrifugal turntable, an oil groove is also arranged on the inner wall of the centrifugal cylinder, a filter cylinder is arranged between the oil groove and the centrifugal turntable, and an oil tank is connected to the bottom of the oil groove; the invention can effectively avoid the phenomenon of dry fruit accumulation at the bottom that is easy to occur in a traditional centrifugal oil-stripping structure, and the dry fruits can always be located at different layers of the centrifugal turntable for centrifugal oil-stripping through the cyclic rotation of the centrifugal turntable, thereby avoiding the accumulation of the dry fruits, and at the same time, in the oil-stripping process, the dry fruits can be turned over, and the flowing hot air generated by the electric hot air blast module flows along the spiral direction of the centrifugal turntable, thereby improving the efficiency of the device in removing oil from the dry fruits.

Description

Technical Field

[0001] The invention relates to the technical field of dried fruit processing, in particular to an electric heating air blast dried fruit drying device. Background Art

[0002] During the pine nut processing, the raw materials are first screened to remove impurities and unqualified products to ensure the consistent quality of the pine nuts entering the subsequent links, and the pine nuts are peeled by peeling machines, hot water immersion equipment or steam peeling equipment to improve their taste and appearance quality. The peeled pine nuts need to be washed and drained to remove surface impurities and moisture in preparation for frying. During the frying process, the pre-treated pine nuts are placed in the frying equipment to control the appropriate oil temperature and frying time. After frying, the pine nuts are usually spun with a centrifugal oil slinger, which uses centrifugal force to throw away excess oil on the surface.

[0003] However, although the existing pine nut oil-spinning equipment can remove most of the surface grease, there will still be grease remaining on the surface of the pine nuts. These greases remaining on the surface of the pine nuts will increase the risk of oxidation, accelerate the deterioration and corruption of the pine nuts, and thus shorten the shelf life of the product. This will not only affect the quality of the product, but may also cause food safety problems. And after frying, there will still be some moisture that is not completely removed from the pine nuts. The residual moisture will make the taste of the pine nuts not crispy enough. The crisp taste is an important feature of many pine nut products, and the residual moisture will greatly reduce its quality. At the same time, the combined effect of moisture and grease residue will significantly shorten the shelf life of the pine nuts, causing the product to deteriorate more easily during storage. At the same time, during the working or standby process of the existing pine nut oil-spinning equipment, since the internal pine nuts are accumulated in the equipment, the pine nuts at the bottom will be soaked in oil for a long time, resulting in a significant increase in its grease content. This will affect the taste of the pine nuts and make them greasy. In addition, the increase in grease content will also affect the nutritional components of the product, making it no longer meet certain healthy diet standards, and a large amount of waste gas will appear in the equipment during the oil-spinning process. If these waste gases accumulate in the equipment, the quality of the pine nuts will be affected. Summary of the invention

[0004] (I) Technical problems to be solved: In view of the deficiencies in the prior art, the present invention provides an electric air-blast dried fruit drying device, which has the advantages of uniform heating of dried fruits, improved drying efficiency and reduced grease adhesion, while maintaining the air flow and dry state in the barrel, thereby solving the problems of grease and moisture residue in the existing pine nut oil-throwing equipment, increased pine nut oil content at the bottom of the equipment and accumulation of waste gas.

[0005] (II) Technical solution: In order to achieve the purpose of uniform heating of the dried fruits, improving drying efficiency and reducing oil adhesion, while maintaining the air fluidity and drying state in the barrel, the present invention provides the following technical solution: an electric heating blast dried fruit drying device, comprising a centrifugal barrel, a centrifugal turntable is coaxially rotated in the centrifugal barrel, a driving shaft is coaxially fixedly connected to the centrifugal turntable, a motor module for driving the centrifugal turntable to rotate is installed on the top of the driving shaft, the overall shape of the centrifugal turntable is a spiral shape, and the cross-section of the centrifugal turntable is an inclined Z-shape, the centrifugal turntable accommodates dried fruits, an electric heating blast module for conveying gas into the centrifugal barrel is arranged at the bottom of the centrifugal barrel, the gas blown out by the electric heating blast module flows along the spiral direction of the centrifugal turntable, the inner wall of the centrifugal barrel is also provided with an oil groove, a filter cartridge is arranged between the oil groove and the centrifugal turntable, and an oil tank is connected to the bottom of the oil groove.

[0006] Preferably, a circulation air hole is provided on the outer end surface of the centrifugal turntable and passes through the centrifugal turntable in the vertical direction, a liquid flow groove is provided on the inner end surface and vertical surface of the centrifugal turntable, the cross-section of the liquid flow groove is an inverted L shape, a filter is provided above the liquid flow groove, a reflux chamber is provided in the drive shaft, the bottom of the drive shaft is connected to the oil tank, the oil tank is communicated with the reflux chamber, and a gas-liquid separation pump is provided between the oil tank and the reflux chamber to generate negative pressure in the liquid flow groove and the reflux chamber, when the gas-liquid separation pump is started, the oil on the surface of the filter and the surrounding gas are drawn into the reflux chamber; when the electric heating blowing module blows gas into the centrifugal cylinder, the gas flows along the spiral direction of the centrifugal turntable and through the circulation air holes respectively, and when the gas passes through the circulation air holes, the gas blows up the dried fruits on the centrifugal turntable and rolls toward the drive shaft side.

[0007] Preferably, a feed port is provided at the top of the centrifuge cylinder, and a discharge port is provided at the bottom of the centrifuge cylinder. The discharge port and the feed port are funnel-shaped, and the bottom contour of the centrifugal turntable is funnel-shaped and matches the funnel shape of the discharge port.

[0008] Preferably, a turbofan is fixedly installed in the liquid flow trough, and the turbofan is arranged along the spiral direction of the centrifugal turntable, and when the centrifugal turntable rotates clockwise, the wind direction generated by the turbofan is vertically downward, and when the centrifugal turntable rotates counterclockwise, the wind direction generated by the turbofan is vertically upward; when the centrifugal turntable rotates clockwise, the dried fruits on the centrifugal turntable roll downward along the spiral direction, and when the centrifugal turntable rotates counterclockwise, the dried fruits on the centrifugal turntable roll upward along the spiral direction.

[0009] Preferably, the bottom diameter of the feed port is smaller than the diameter of the Z-shaped inner bend of the centrifugal turntable.

[0010] Preferably, an annular sealing cover plate is provided on the feed port and the discharge port.

[0011] Preferably, the bottom diameter of the centrifugal turntable is smaller than the diameter of the discharge port.

[0012] Preferably, a support seat is fixedly connected to the centrifugal cylinder.

[0013] (III) Beneficial effects: Compared with the prior art, the present invention provides an electric heating air blast dried fruit drying device, which has the following beneficial effects:

[0014] 1. The electric hot air blast dried fruit drying device can effectively avoid the phenomenon of dried fruit accumulation at the bottom that is easy to occur in the traditional centrifugal oil-throwing structure through the coordinated use of the centrifugal turntable structure and the electric hot air blast module. The dried fruits can always be located at different layers of the centrifugal turntable for centrifugal oil-throwing through the cyclic rotation of the centrifugal turntable, thereby avoiding the accumulation of dried fruits. At the same time, during the oil-throwing process, when the dried fruits pass through the Z-shaped slope of the centrifugal turntable, the dried fruits will also be turned over. The flowing hot air generated by the electric hot air blast module flows along the spiral direction of the centrifugal turntable, which can also cause the dried fruits to vibrate and turn over and dry the surface of the dried fruits, thereby improving the efficiency of the device in removing oil from dried fruits.

[0015] 2. The electric hot air blast dried fruit drying device can effectively reduce the adhesion of oil on the surface of each layer of the centrifugal turntable through the coordinated use of the centrifugal turntable structure, the liquid flow trough structure, the reflux chamber structure, and the gas-liquid separation pump. At the same time, because the gas-liquid separation pump will cause the liquid flow trough to generate negative pressure, the waste gas in the centrifugal cylinder can be discharged layer by layer along the spiral direction of the centrifugal turntable. The timely discharge of the waste gas helps to maintain the dry state of the air in the cylinder and prevent moisture from accumulating in the cylinder. The dry air can more effectively absorb moisture and grease on the surface of the dried fruit and improve the drying effect. The waste gas is discharged layer by layer along the spiral direction, which can maintain good fluidity of the airflow in the cylinder. This good airflow fluidity can ensure that the hot air can be evenly blown to each layer of dried fruit to avoid local overheating or uneven drying. At the same time, the waste gas may contain some volatile substances or odors. By discharging them in time, these substances can be prevented from accumulating in the cylinder, thereby preventing them from having a negative impact on the quality of the dried fruit.

[0016] 3. The electric heating air blast dried fruit drying device, through the coordinated use of the centrifugal turntable structure, the liquid flow trough structure, and the circulating pore structure, the hot air can better penetrate the dried fruit accumulation area to ensure that each layer of dried fruit can be blown by even hot air, and the even distribution of hot air can prevent the dried fruit in certain areas from being subjected to excessive heat, avoiding the problem of local overheating, thereby ensuring that the temperature distribution of the dried fruit in the entire barrel is more even, making the drying process more efficient, and the moisture and oil on the surface of the dried fruit are more easily evaporated and taken away under the action of continuous and even hot air. At the same time, because the hot air can blow up the dried fruit and turn it over, the dried fruit can be continuously turned and rolled on the centrifugal turntable to avoid accumulation on one side. This even movement ensures that each dried fruit is evenly heated, thereby achieving an even drying effect.

[0017] 4. The electric heating air blast dried fruit drying device, through the coordinated use of the centrifugal turntable structure and the turbofan structure, the turbofan can form a more uniform airflow distribution in the liquid flow groove, so that the negative pressure effect on each layer of the centrifugal turntable is consistent, ensuring that the grease on the surface of the centrifugal turntable and the surface of the dried fruit can be effectively removed, reducing the adhesion of grease, so that the dried fruit can be heated more evenly in the subsequent drying process, improving the drying efficiency, and the structure is designed in the liquid flow groove in the centrifugal turntable, which effectively saves the space of the centrifugal cylinder while increasing the suction force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the electric heating air blast dried fruit drying device of the present invention;

[0019] Figure 2 It is a structural front view of the electric heating air blast dried fruit drying device of the present invention;

[0020] Figure 3 It is a top view of the structure of the electric heating air blast dried fruit drying device in the present invention;

[0021] Figure 4 for Figure 3 Middle AA section view;

[0022] Figure 5 It is a three-dimensional structural cross-sectional view of the electric heating air blast dried fruit drying device of the present invention;

[0023] Figure 6 for Figure 4 A magnified view of the local structure in the middle B;

[0024] Figure 7 It is a structural schematic diagram of Embodiment 2 of the present invention;

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0026] Fig. 9 for Figure 5 The enlarged view of the local structure in Figure C.

[0027] In the figure: 1. Support seat; 2. Centrifugal cylinder; 21. Oil tank; 22. Filter cylinder; 23. Feed inlet; 24. Discharge outlet; 3. Motor module; 4. Electric heating blower module; 5. Oil tank; 6. Gas-liquid separation pump; 7. Drive shaft; 71. Reflux chamber; 8. Centrifugal turntable; 81. Circulation air hole; 82. Liquid flow trough; 83. Filter screen; 84. Turbofan. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 4The electric hot air blast dried fruit drying device comprises a centrifugal cylinder 2, a centrifugal turntable 8 is coaxially rotated in the centrifugal cylinder 2, and the design of the centrifugal turntable 8 coaxially rotated in the centrifugal cylinder 2 is to ensure that the dried fruit can be subjected to uniform centrifugal force in the centrifugal cylinder 2. Through coaxial rotation, the dried fruit can be evenly distributed in various parts of the centrifugal turntable 8 under the action of centrifugal force, avoiding accumulation on one side, and improving the effect of deoiling and drying. The centrifugal turntable 8 is coaxially fixedly connected with a drive shaft 7, and the top of the drive shaft 7 is equipped with a motor module 3 that drives it to rotate. The centrifugal turntable 8 is coaxially fixedly connected with the drive shaft 7, and is driven to rotate by the motor module 3. This design can provide stable and controllable rotational power. The motor module 3 can accurately control the rotation speed and direction of the turntable, thereby optimizing the tumbling and distribution of the dried fruit, making the effects of centrifugal force and hot air more uniform, and effectively improving the efficiency of deoiling and drying. The overall shape of the centrifugal turntable 8 is a spiral shape, and the cross-section of the centrifugal turntable 8 is an inclined Z-shape. This design can ensure that the gas flows along the path of the centrifugal turntable 8, maximize the contact area between the hot air and the dried fruit, and improve the drying effect. And increase the rolling and disturbance of the dried fruit, enhance the effect of centrifugal oil removal, and make it easier for the oil to flow out from the surface of the dried fruit and gather along the slope. The dried fruit is accommodated on the centrifugal turntable 8, and the bottom of the centrifugal cylinder 2 is provided with an electric heating blast module 4 for transmitting gas into the centrifugal cylinder 2. The gas blown by the electric heating blast module 4 flows along the spiral direction of the centrifugal turntable 8. The hot air flows in the spiral direction to ensure that each layer of dried fruit can be heated evenly, avoiding local overheating or uneven drying. The dried fruit rolls and vibrates under the action of the hot air flow, further promoting the separation and drying process of the oil. The inner wall of the centrifugal cylinder 2 is also provided with an oil groove 21, and a filter cartridge 22 is provided between the oil groove 21 and the centrifugal turntable 8. The bottom of the oil groove 21 is connected to an oil tank 5. The oil tank 21 and the filter cartridge 22 are designed to collect and remove the grease thrown out. The filter cartridge 22 can filter the grease thrown out by the dried fruits to prevent the grease from contaminating the dried fruits again, while the oil tank 21 can collect the grease and discharge it out of the centrifugal cylinder 2 to keep the cylinder clean and improve the working efficiency of the equipment.

[0030] See also Figure 4 , Figure 5 , Figure 6 and Fig. 9, a circulation pore 81 is provided on the outer end surface of the centrifugal turntable 8, which penetrates the centrifugal turntable 8 in the vertical direction. The circulation pore 81 is designed to penetrate the centrifugal turntable 8 in the vertical direction on the outer end surface of the centrifugal turntable 8, mainly to enhance the circulation of gas and the tumbling effect of dried fruits. When the hot air generated by the electric heating blast module 4 passes through the circulation pore 81, the dried fruits on the centrifugal turntable 8 can be blown up and turned over, and blown to the inside of the centrifugal turntable 8. This can not only make the dried fruits more evenly heated, but also prevent the dried fruits from accumulating on the outside of the centrifugal turntable 8, ensure the uniform distribution of the dried fruits in the entire cylinder, and improve the drying and de-oiling effect. A liquid flow groove 82 is provided on the inner end surface and vertical surface of the centrifugal turntable 8, and the cross section of the liquid flow groove 82 is an inverted L shape. The liquid flow groove 82 is provided on the inner end surface and vertical surface of the centrifugal turntable 8, and the cross section is an inverted L shape, mainly to collect and discharge the grease on the surface of the dried fruits. The inverted L-shaped liquid flow groove 82 can effectively guide the flow of grease and reduce the retention and accumulation of grease on the centrifugal turntable 8. This ensures that the grease on the surface of the dried fruit can be quickly collected and discharged through the liquid flow groove 82, thereby improving the de-oiling effect. A filter screen 83 is arranged above the liquid flow groove 82. The filter screen 83 is designed to filter the grease thrown off the surface of the dried fruit. The filter screen 83 can intercept larger grease particles and impurities, preventing these impurities from entering the liquid flow groove 82 and the reflux chamber 71, thereby protecting the normal operation of the equipment. The presence of the filter screen 83 can ensure that the discharged grease is relatively pure and improve the quality of the recovered grease. A reflux chamber 71 is provided in the drive shaft 7. The design of providing the reflux chamber 71 in the drive shaft 7 is to provide a reflux channel for grease and waste gas. The reflux chamber 71 can collect the grease and waste gas filtered through the liquid flow groove 82 and the filter screen 83, and discharge them out of the centrifugal cylinder 2 through the drive shaft 7, thereby avoiding the accumulation of grease and waste gas in the centrifugal cylinder 2 and improving the working efficiency and drying effect of the equipment. The bottom of the drive shaft 7 is connected to the oil tank 5, and the oil tank 5 is connected to the reflux chamber 71. The design of connecting the oil tank 5 to the reflux chamber 71 is to facilitate the collection and storage of grease thrown from the surface of the dried fruit. The oil tank 5 can collect the grease discharged from the reflux chamber 71 in a centralized manner, thereby keeping the equipment clean and running efficiently. At the same time, this design is also convenient for subsequent grease treatment and recovery. A gas-liquid separation pump 6 is provided between the oil tank 5 and the reflux chamber 71 to generate negative pressure in the liquid flow groove 82 and the reflux chamber 71. The gas-liquid separation pump 6 is provided between the oil tank 5 and the reflux chamber 71 to generate negative pressure in the liquid flow groove 82 and the reflux chamber 71, in order to enhance the suction effect of grease and waste gas. The gas-liquid separation pump 6 can quickly draw the grease attached to the centrifugal turntable 8 and the surface of the dried fruit into the reflux chamber 71 by generating negative pressure, and discharge it into the oil tank 5 through the liquid flow groove 82. At the same time, the existence of negative pressure can also discharge the waste gas in the centrifugal cylinder 2, keep the air in the cylinder dry and circulate, and improve the drying effect.When the gas-liquid separation pump 6 is started, the oil on the surface of the filter 83 and the surrounding gas are sucked into the reflux chamber 71; when the electric heating air blowing module 4 blows gas into the centrifugal cylinder 2, the gas flows along the spiral direction of the centrifugal turntable 8 and through the circulating air holes 81. When the gas passes through the circulating air holes 81, the gas blows up the dried fruits on the centrifugal turntable 8 and rolls toward the drive shaft 7. The top of the centrifugal cylinder 2 is provided with a feed port 23, and the bottom of the centrifugal cylinder 2 is provided with a discharge port 24. The discharge port 24 and the feed port 23 are in the shape of a funnel. The bottom contour of the centrifugal turntable 8 is funnel-shaped and matches the funnel shape of the discharge port 24.

[0031] See also Figure 1 , Figure 2 , Figure 4 , the bottom diameter of the feed port 23 is smaller than the diameter of the inner bend of the Z-shaped centrifugal turntable 8. The design that the bottom diameter of the feed port 23 is smaller than the diameter of the inner bend of the Z-shaped centrifugal turntable 8 is mainly to ensure that the dried fruit can smoothly fall to the side of the centrifugal turntable 8 with a lower height. This design allows the dried fruit to directly fall on the side of the Z-shaped slope of the centrifugal turntable 8 close to the drive shaft 7 after entering the centrifugal cylinder 2, avoiding interference or accumulation of the dried fruit when entering the device, thereby ensuring that the dried fruit can be evenly distributed on the centrifugal turntable 8, improving the drying and de-oiling effect. The feed port 23 and the discharge port 24 are provided with an annular sealing cover plate, which is not shown in the figure. The feed port 23 and the discharge port 24 are provided with an annular sealing cover plate, which is mainly to prevent the leakage of gas and grease. The sealing cover plate can ensure that the airflow and pressure inside the centrifugal cylinder 2 remain stable, prevent external air from entering or internal hot air and grease from leaking, thereby improving the working efficiency and safety of the device. At the same time, the sealing cover plate can also reduce heat loss, maintain the temperature inside the centrifugal cylinder 2, and help improve the drying and deoiling effect. And there is an oil pipeline connected to the oil tank 5 on the annular sealing cover plate of the discharge port 24. The oil pipeline connected to the oil tank 5 is designed on the annular sealing cover plate of the discharge port 24 to facilitate the direct delivery of the collected grease to the oil tank 5. This ensures that the grease can directly enter the oil tank 5 through the oil pipeline on the sealing cover plate, avoiding the accumulation of grease at the bottom of the centrifugal cylinder 2. The bottom diameter of the centrifugal turntable 8 is smaller than the diameter of the discharge port 24. The design of the bottom diameter of the centrifugal turntable 8 being smaller than the diameter of the discharge port 24 is mainly to facilitate the smooth discharge of dried fruits. When it is necessary to discharge dried fruits, the centrifugal turntable 8 rotates clockwise to discharge the dried fruits from the discharge port 24 at the bottom. The larger diameter of the discharge port 24 can ensure that the dried fruits are discharged unimpeded, avoiding blockage or accumulation of dried fruits during the discharge process, thereby improving the discharge efficiency and the continuous working capacity of the device. The centrifugal cylinder 2 is fixedly connected with a support seat 1. The design of the support base 1 fixedly connected to the centrifugal cylinder 2 is mainly to provide stability and support force for the device. The support base 1 can ensure that the centrifugal cylinder 2 remains stable during operation and avoid tilting or damage to the device due to vibration or other external forces.

[0032] See also Figure 7 and Figure 8 A turbofan 84 is also fixedly arranged in the liquid flow groove 82. The turbofan 84 can generate airflow, which cooperates with the negative pressure generated by the gas-liquid separation pump 6 to form a synergistic airflow system, increasing the speed at which liquid oil and exhaust gas are drawn into the reflux chamber 71, thereby improving the gas-liquid separation effect. In addition, the turbofan 84 can form a more uniform airflow distribution in the liquid flow groove 82, ensuring that the grease on the surface of the centrifugal turntable 8 and the surface of the dried fruit can be effectively removed, reducing the adhesion of grease and improving the drying efficiency. The turbofan 84 is designed in the liquid flow groove 82 in the centrifugal turntable 8, which can effectively save the space of the centrifugal cylinder 2 while improving the suction force, making the device more compact. The turbofan 84 is arranged along the spiral direction of the centrifugal turntable 8, and when the centrifugal turntable 8 rotates clockwise, the wind direction generated by the turbofan 84 is vertically downward, and when the centrifugal turntable 8 rotates counterclockwise, the wind direction generated by the turbofan 84 is vertically upward; when the centrifugal turntable 8 rotates clockwise, the dried fruits on the centrifugal turntable 8 roll downward along the spiral direction, and when the centrifugal turntable 8 rotates counterclockwise, the dried fruits on the centrifugal turntable 8 roll upward along the spiral direction. The centrifugal force in a single direction may cause the dried fruits to accumulate on one side, affecting the de-oiling effect. By changing the direction of rotation regularly, the dried fruits can be more evenly distributed and moved in the centrifugal barrel 2 to avoid accumulation. At the same time, the reverse rotation will cause the dried fruits to roll and vibrate more in the centrifugal barrel 2, which will help more surface grease to fall off and improve the de-oiling effect.

[0033] Working principle: The equipment is applied to the oil-spinning process after the frying of dried fruits. First, pour the fried dried fruits into the centrifugal cylinder 2 along the feed port 23, and the dried fruits will fall on the side of the centrifugal turntable 8 with a low height, that is, the side of the centrifugal turntable 8 Z-shaped near the drive shaft 7, then close the annular sealing cover plate of the feed port 23, and start the electric heating blast module 4, the gas-liquid separation pump 6, and the motor module 3. The motor module 3 will drive the drive shaft 7 to drive the centrifugal turntable 8 to rotate, and the dried fruits on the centrifugal turntable 8 will rotate with it. In this process, the dried fruits will be affected by the centrifugal force and gradually approach the outside of the centrifugal turntable 8, and the dried fruits will roll over when passing through the Z-shaped slope of the centrifugal turntable 8. At the same time, due to the existence of the slope, the oil attached to the dried fruits will adhere to the slope and flow toward the drive shaft 7. The dried fruits passing through the slope will move to the outside of the centrifugal turntable 8 and adhere to the filter cylinder 22. The remaining oil on the dried fruits will be affected by the centrifugal force and pass through the filter cylinder 22 into the oil tank 21 and discharged from the bottom of the oil tank 21 into the oil tank 5. During the rotation of the centrifugal turntable 8, the hot air generated by the electric heating blast module 4 will flow in the spiral direction of the centrifugal turntable 8, and during the high-speed flow process, the dried fruits will be disturbed. This disturbance will cause the dried fruits to flip and vibrate on the turntable. Flipping and vibration will cause the exposed surface of the dried fruit surface to change continuously, so that the oil on the surface is more easily taken away by the hot air. The high temperature of the hot air will also help evaporate the grease on the surface of the dried fruit, making it easier to detach from the surface. Among them, every time the centrifugal turntable 8 rotates in one direction for a certain period of time, the motor module 3 will drive the centrifugal turntable 8 to rotate in another direction in the opposite direction. The centrifugal force in a single direction may cause the dried fruits to accumulate on one side, affecting the degreasing effect. By regularly changing the direction of rotation, the dried fruits can be distributed and moved more evenly in the centrifugal barrel 2. At the same time, reverse rotation will cause the dried fruits to roll and vibrate more in the centrifugal barrel 2, which will help more surface grease to fall off. The centrifugal force in different directions can more fully remove the grease on the surface of the dried fruits. When the dried fruits need to be discharged, the motor module 3 drives the centrifugal turntable 8 to rotate clockwise to discharge the dried fruits from the bottom discharge port 24. This can effectively avoid the phenomenon of dried fruits piling up at the bottom that is prone to occur in the traditional centrifugal oil-spinning structure. The dried fruits can always be placed on different layers of the centrifugal turntable 8 for centrifugal oil-spinning through the cyclic rotation of the centrifugal turntable 8, thereby avoiding the accumulation of dried fruits. At the same time, during the oil-spinning process, when the dried fruits pass through the Z-shaped slope of the centrifugal turntable 8, the dried fruits will also be turned over. The flowing hot air generated by the electric heating blast module 4 flowing along the spiral direction of the centrifugal turntable 8 can also vibrate and turn over the dried fruits and dry the surface of the dried fruits, thereby improving the efficiency of the device in removing oil from dried fruits.

[0034] At the same time, during the process of centrifugal oil rejection by the device, the dried fruits will roll over when passing through the Z-shaped slope of the centrifugal turntable 8, and the oil attached to the dried fruits will adhere to the slope. Since the centrifugal turntable 8 is provided with a liquid flow groove 82 and the surface of the liquid flow groove 82 is paved with a filter screen 83, and the gas-liquid separation pump 6 is started, by extracting air and gas mixture, a negative pressure is generated inside the reflux chamber 71 and the liquid flow groove 82, so that the oil attached to the centrifugal turntable 8 will enter the liquid flow groove 82 through the filter screen 83, and then be discharged into the oil tank 5 through the liquid flow groove 82. This can effectively reduce the adhesion of oil on the surface of each layer of the centrifugal turntable 8. At the same time, since the gas-liquid separation pump 6 can cause the liquid flow groove 82 to generate negative pressure, the exhaust gas in the centrifugal cylinder 2 can be discharged layer by layer along the spiral direction of the centrifugal turntable 8. The timely discharge of the exhaust gas helps to maintain the dry state of the air in the cylinder and prevent moisture from accumulating in the cylinder. The dry air can more effectively absorb moisture and grease on the surface of the dried fruits, thereby improving the drying effect. And the exhaust gas is discharged layer by layer in the spiral direction, which can maintain good fluidity of the airflow in the barrel. This good airflow fluidity can ensure that the hot air can blow evenly to each layer of dried fruits, avoiding local overheating or uneven drying. At the same time, the exhaust gas may contain some volatile substances or odors. By discharging them in time, these substances can be avoided from accumulating in the barrel, thereby preventing them from having a negative impact on the quality of the dried fruits.

[0035] After the turbofan 84 is arranged in the liquid flow groove 82, since the turbofan 84 can rotate together with the centrifugal turntable 8, during the clockwise rotation of the turbofan 84, the wind direction generated is downward toward the liquid flow groove 82. This wind direction is consistent with the negative pressure direction generated by the gas-liquid separation pump 6, forming a synergistic airflow system, which increases the speed at which the liquid oil and exhaust gas are drawn into the reflux chamber 71. This acceleration effect makes the negative pressure effect of the gas-liquid separation pump 6 more significant, thereby enhancing its suction capacity. At the same time, the effect of the turbofan 84 can form a more uniform airflow distribution in the liquid flow groove 82, so that the negative pressure effect on each layer of the centrifugal turntable 8 is consistent, ensuring that the grease on the surface of the centrifugal turntable 8 and the surface of the dried fruit can be effectively removed, reducing the adhesion of grease. In this way, the dried fruit can be heated more evenly in the subsequent drying process, thereby improving the drying efficiency. In addition, the structure is designed in the liquid flow groove 82 in the centrifugal turntable 8, which effectively saves the space of the centrifugal cylinder 2 while increasing the suction force.

[0036] The design of the circulating air holes 81 allows the hot air generated by the electric heating air blowing module 4 to flow through the circulating air holes 81. When the hot air passes through the circulating air holes 81, the dried fruits on the centrifugal turntable 8 will be blown up and turned over, and blown to the inside of the centrifugal turntable 8. This not only makes the dried fruits more evenly heated, but also prevents the dried fruits from accumulating on the outside of the centrifugal turntable 8. At the same time, in this process, since the hot air can flow vertically through the circulating air holes 81, the circulating air holes 81 and the liquid flow grooves 82 of each layer can form an air flow system, so that the gas circulation of the centrifugal turntable 8 between different layers is faster. In this way, the hot air can better penetrate the dried fruit accumulation area, ensuring that the dried fruits of each layer can be blown by uniform hot air. And the uniform hot air distribution can prevent the dried fruits in certain areas from being subjected to excessive heat, avoid the problem of local overheating, thereby ensuring that the temperature distribution of the dried fruits in the entire barrel is more uniform, making the drying process more efficient. The moisture and grease on the surface of the dried fruits are more easily evaporated and taken away under the action of continuous and uniform hot air. At the same time, since the hot air can blow up the dried fruits and turn them over, the dried fruits can be constantly turned and rolled on the centrifugal turntable 8 to avoid piling up on one side. This uniform movement ensures that each dried fruit can be evenly heated, thereby achieving a uniform drying effect.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric hot air dried fruit drying device, comprising a centrifugal drum (2), wherein a centrifugal turntable (8) is coaxially rotatably mounted inside the centrifugal drum (2), a driving shaft (7) is coaxially fixedly connected to the centrifugal turntable (8), and a motor module (3) is mounted on the top of the driving shaft (7) for driving the driving shaft (7) to rotate, characterized in that: The centrifugal turntable (8) has an overall spiral shape, and a cross-section of the centrifugal turntable (8) is an inclined Z-shape. Dried fruits are accommodated on the centrifugal turntable (8). An electric heating air blowing module (4) for conveying gas into the centrifugal cylinder (2) is arranged at the bottom of the centrifugal cylinder (2). The gas blown out by the electric heating air blowing module (4) flows along the spiral direction of the centrifugal turntable (8). An oil groove (21) is also arranged on the inner wall of the centrifugal cylinder (2). A filter cartridge (22) is arranged between the oil groove (21) and the centrifugal turntable (8). The bottom of the oil groove (21) is connected to an oil tank (5).

2. The electric heating air blast dried fruit drying device according to claim 1, characterized in that: A circulation air hole (81) is provided on the outer end surface of the centrifugal turntable (8) and passes through the centrifugal turntable (8) in a vertical direction. A liquid flow groove (82) is provided on the inner end surface and vertical surface of the centrifugal turntable (8). The cross section of the liquid flow groove (82) is in an inverted L shape. A filter screen (83) is provided above the liquid flow groove (82). A reflux chamber (71) is provided in the drive shaft (7). The bottom of the drive shaft (7) is connected to the oil tank (5). The oil tank (5) is in communication with the reflux chamber (71), and the oil tank (5) and the reflux chamber (71) are connected to each other. A gas-liquid separation pump (6) is provided between the centrifugal cylinder (2) and the centrifugal drum (8), which generates negative pressure in the liquid flow groove (82) and the reflux chamber (71). When the gas-liquid separation pump (6) is started, the oil on the surface of the filter screen (83) and the surrounding gas are sucked into the reflux chamber (71). When the electric heating air blowing module (4) blows gas into the centrifugal cylinder (2), the gas flows along the spiral direction of the centrifugal turntable (8) and through the circulation air holes (81). When the gas passes through the circulation air holes (81), the gas blows up the dried fruits on the centrifugal turntable (8) and rolls them toward the drive shaft (7).

3. The electric heating air blast dried fruit drying device according to claim 1, characterized in that: The top of the centrifugal cylinder (2) is provided with a feed port (23), and the bottom of the centrifugal cylinder (2) is provided with a discharge port (24); the discharge port (24) and the feed port (23) are in the shape of a funnel, and the bottom contour of the centrifugal turntable (8) is funnel-shaped and matches the funnel shape of the discharge port (24).

4. The electric heating air blast dried fruit drying device according to claim 2, characterized in that: A turbofan (84) is also fixedly arranged in the liquid flow groove (82); the turbofan (84) is arranged along the spiral direction of the centrifugal turntable (8); and when the centrifugal turntable (8) rotates clockwise, the wind direction generated by the turbofan (84) is vertically downward; when the centrifugal turntable (8) rotates clockwise, the dried fruits on the centrifugal turntable (8) roll downward along the spiral direction; when the centrifugal turntable (8) rotates counterclockwise, the dried fruits on the centrifugal turntable (8) roll upward along the spiral direction.

5. The electric heating air blast dried fruit drying device according to claim 3, characterized in that: The bottom diameter of the feed port (23) is smaller than the diameter of the Z-shaped inner bend of the centrifugal turntable (8).

6. The electric heating air blast dried fruit drying device according to claim 3, characterized in that: The feed port (23) and the discharge port (24) are provided with an annular sealing cover plate.

7. The electric heating air blast dried fruit drying device according to claim 3, characterized in that: The bottom diameter of the centrifugal turntable (8) is smaller than the diameter of the discharge port (24).

8. The electric heating air blast dried fruit drying device according to claim 1, characterized in that: The centrifugal cylinder (2) is fixedly connected to a support base (1).

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