Hot air circulation equipment

Abstract

The present invention discloses a hot air circulation device, comprising a first box, a second box, a hot air circulation machine, a first conveying mechanism and a vibrating feeding device, wherein the second box is arranged inside the first box, a heat-blocking barrier is fixedly connected between the inner wall of the first box and the outer wall of the second box, the first box, the second box and the heat-blocking barrier cooperate to form a first cavity, a second cavity and a third cavity, the hot air circulation machine is installed on one side of the first box, the hot air circulation machine is used to circulate and convey hot air, and can control the humidity of the input hot air, and a box circulation air mechanism matching the hot air circulation machine is installed on the side wall of the second box. Compared with the prior art, a hot air circulation device of the present invention can realize multi-stage drying of sweet potatoes at the same time, and after dehydration is completed, the pre-drying of sweet potatoes can be realized during transportation, which reduces the time required for drying sweet potatoes and is conducive to improving the production efficiency of dried sweet potatoes.

Description

Technical Field

[0001] The invention belongs to the technical field of drying equipment, and in particular relates to hot air circulation equipment. Background Art

[0002] As a traditional agricultural product, sweet potato is widely grown and eaten around the world. Dried sweet potato is a product made from fresh sweet potato. It is portable and durable, and is one of the most popular snack foods.

[0003] The production of dried sweet potatoes can be roughly divided into the following steps: material selection → cleaning → slicing → dehydration → drying → packaging. Among them, dehydration and drying are the most critical parts of the production process. Generally, dehydration and drying are completed by two devices. After the dehydration of dried sweet potatoes is completed, they are transported to the drying equipment, which affects the production efficiency of dried sweet potatoes.

[0004] The drying of dried sweet potatoes can generally be divided into three stages. The first stage is to pre-dry the dried sweet potatoes, the second stage is to dry the dried sweet potatoes at high temperature, and the drying temperature in the third stage is generally lower than that in the first and second stages. From the first stage to the third stage, the humidity in the drying space decreases successively. The existing hot air circulation drying box can only perform one stage of drying at a time, resulting in a long drying time for the dried sweet potatoes, which affects the production efficiency of the dried sweet potatoes.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide a hot air circulation device which can solve the technical problems raised in the above-mentioned background technology.

[0007] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows:

[0008] 14. The hot air circulation device of claim 13, wherein the first housing is provided inside the first housing, and a heat-resistant barrier portion is fixedly connected between an inner wall of the first housing and an outer wall of the second housing, and the first housing, the second housing and the heat-resistant barrier portion cooperate to form a first cavity, a second cavity and a third cavity. The hot air circulation device is installed on one side of the first housing, and the hot air circulation device is used to circulate and convey hot air, and can control the humidity of the input hot air. A housing circulating air mechanism matching the hot air circulation device is installed on the side wall of the second housing, and the housing circulating air mechanism cooperates with the hot air circulation device to realize circulating and conveying hot air into the second housing, and the first conveying mechanism is installed inside the first housing, and one end of the first conveying mechanism passes through the first cavity, the second cavity and the third cavity in sequence. The vibrating feeding device is located on one side of the first housing, and a feeding mechanism is installed between the vibrating feeding device and the first conveying mechanism.

[0009] In one or more embodiments of the present invention, the first conveying mechanism is a multi-layer conveying mechanism, and a circulating air plate is installed between each layer of the conveying mechanism, the upper end surface of the circulating air plate is provided with a circulating air outlet, and the lower end surface of the circulating air plate is provided with a circulating air inlet, the interior of the circulating air plate is fixedly connected with an air outlet pipe for conveying gas to the circulating air outlet, and the other end of the air outlet pipe is connected to a hot air circulation machine, and the interior of the circulating air plate is fixedly connected with an air inlet pipe for extracting gas in the circulating air inlet, and the other end of the air inlet pipe is connected to the hot air circulation machine.

[0010] In one or more embodiments of the present invention, a plurality of connecting rods are fixedly connected to the upper end of the first conveying mechanism, and the connecting rods pass through the upper wall of the first box body. A mounting frame matching the connecting rods is fixedly connected to the upper end surface of the first conveying mechanism, and a lifting mechanism matching the connecting rods is installed on the mounting frame to change the position of the first conveying mechanism.

[0011] In one or more embodiments of the present invention, a transmission mechanism is fixedly connected to one side of the first conveying mechanism, a slide groove matching the transmission mechanism is opened on the first box body, the transmission mechanism is slidably connected in the slide groove in the vertical direction, the transmission mechanism includes a slider, the slider is slidably connected in the slide groove, the slider is rotatably connected with a first gear, a first transmission rod is fixedly connected between the first gear and the first conveying mechanism, the first transmission rod is fixedly connected to a roller at one end of the first conveying mechanism, the end of the slider away from the first box body is fixedly connected to a protective frame, the protective frame is rotatably connected with a second transmission rod, the second transmission rod is fixedly connected with a second gear matching the first gear, and the upper end of the protective frame is fixedly connected with a motor for driving the second transmission rod to rotate.

[0012] In one or more embodiments of the present invention, a second shell is fixedly connected to one end of the first box body away from the vibrating feeding device, a seventh conveying mechanism matching the first conveying mechanism is fixedly connected inside the second shell, the feeding mechanism includes a first shell, the first shell is fixedly connected to one end of the first box body away from the second shell, a sixth conveying mechanism, a fourth conveying mechanism and a third conveying mechanism are fixedly connected in sequence inside the first shell, a second conveying mechanism matching the first conveying mechanism is fixedly connected inside the first box body, and a plurality of feeding channels matching the second conveying mechanism are fixedly connected to one end of the first shell close to the second conveying mechanism.

[0013] In one or more embodiments of the present invention, a heat recovery mechanism is provided between the second shell and the feeding mechanism, and the heat recovery mechanism is used to recover the heat of the dried product and transfer the heat to the first shell to achieve pre-drying of the product in the first shell.

[0014] In one or more embodiments of the present invention, the heat recovery mechanism includes a circulation pump, the upper end of the circulation pump is fixedly connected to a heat input pipe and a heat output pipe, the end of the heat input pipe away from the circulation pump is fixedly connected to a heat input plate, the heat input plate is fixedly connected in the second shell, the end of the heat output pipe away from the circulation pump is fixedly connected to the heat output plate, and the heat output plate is fixedly connected to the first shell.

[0015] In one or more embodiments of the present invention, a drying device is also included. The first box body is fixedly connected with a first connecting pipe that communicates with the first cavity, the second cavity and the third cavity. A pipe sleeve is installed at one end of the first connecting pipe away from the first box body. The pipe sleeve is sleeved on the heat output pipe. The pipe sleeve and the heat output pipe form a heat exchange cavity. A second connecting pipe is installed between the pipe sleeve and the drying device. The second shell is hollow. A cold air output pipe is installed between the second shell and the drying device. Cold air can be transported to the second shell through the cold air output pipe. One end of the second shell is fixedly connected with the first output pipe.

[0016] In one or more embodiments of the present invention, a water tank is detachably mounted on the lower end of the second shell, a liquid output pipe is installed between the water tank and the drying device, and the water tank can achieve heat exchange with the second shell.

[0017] In one or more embodiments of the present invention, temperature control mechanisms for controlling heat transfer of hot air are fixedly connected to both sides of the second box.

[0018] Compared with the prior art, the hot air circulation device of the present invention has the following advantages:

[0019] 2) The hot air circulation equipment can realize multi-stage drying of sweet potatoes at the same time. After dehydration, the sweet potatoes can be pre-dried during transportation, which reduces the time required for drying sweet potatoes and helps improve the production efficiency of dried sweet potatoes.

[0020] 3) The excess heat of the dried sweet potatoes is absorbed by the heat transport mechanism, and the absorbed heat is transported to the undried sweet potatoes, that is, the heat is transported to the first shell for preheating the sweet potatoes, which is beneficial to energy saving and environmental protection;

[0021] 4) By setting a circulating air plate and cooperating with the box circulating air mechanism, the sweet potatoes on each layer of the first conveying mechanism can be dried, which is beneficial to improving the quality of the dried sweet potatoes. In the process of circulating hot air drying, the debris and other impurities generated by drying the sweet potatoes are taken away, which is beneficial to reducing the impurities in the hot air circulation equipment. By lifting the first conveying mechanism, the end surface of the dried sweet potatoes that is not in direct contact with the hot air is in contact with the circulating air plate and the box circulating air mechanism, so that the end surface of the dried sweet potatoes that is not in direct contact with the hot air is contacted with the circulating air plate and the box circulating air mechanism. The temperature of the surface of the circulating air plate and the box circulating air mechanism is used to dry the dried sweet potatoes in a contact manner, which is beneficial to improving the uniformity of the drying of the dried sweet potatoes, thereby improving the quality of the dried sweet potatoes after drying;

[0022] 5) By setting up a cold drying mechanism, the cold drying mechanism can extract air according to the humidity of the air in the first cavity, the second cavity and the third cavity, and perform cold drying treatment, thereby reducing the impact of direct discharge of hot air on the environment, and using the cold air and cold liquid generated by the cold dry hot air to cool the dried sweet potatoes, which is beneficial to energy saving and environmental protection, and can also improve the efficiency of cooling the dried sweet potatoes;

[0023] 6) Improve the convenience of placing and taking sweet potatoes. Compared with the existing drying box, it is necessary to open the drying box and take out the sweet potatoes after drying. The present invention can reduce the heat loss caused by this process, which is beneficial to reduce the energy consumption during the drying process of the hot air circulation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a hot air circulation device in one embodiment of the present invention Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of a hot air circulation device in one embodiment of the present invention Figure 2 ;

[0027] Figure 3 A partial cross-sectional view of a hot air circulation device in one embodiment of the present invention Figure 1 ;

[0028] Figure 4 A cross-sectional view of a first box body and a second box body in one embodiment of the present invention;

[0029] Figure 5 A partial cross-sectional view of a hot air circulation device in one embodiment of the present invention Figure 2 ;

[0030] Figure 6 A partial cross-sectional view of a hot air circulation device in one embodiment of the present invention Figure 3 ;

[0031] Figure 7 for Figure 6 Schematic diagram of the structure at A in the middle;

[0032] Figure 8 A partial cross-sectional view of a hot air circulation device in one embodiment of the present invention Figure 4 ;

[0033] Fig. 9 It is a structural schematic diagram of the second box and the first conveying mechanism in one embodiment of the present invention;

[0034] Fig.10 A partial cross-sectional view of a hot air circulation device in one embodiment of the present invention Figure 5 ;

[0035] Fig.11 for Fig.10 Schematic diagram of the structure at B in the middle;

[0036] Fig.12 It is a cross-sectional view of a circulating air plate in one embodiment of the present invention.

[0037] Description of main reference numerals:

[0038] 1. First box body; 101. Slide; 2. Second box body; 201. Baffle; 3. Heat-blocking and insulating part; 4. First cavity; 5. Second cavity; 6. Third cavity; 7. Circulating air plate; 701. Circulating air outlet; 702. Circulating air inlet; 8. Air outlet pipe; 9. Air inlet pipe; 10. Box body circulating air mechanism; 1001. Air outlet mechanism; 1002. Air inlet mechanism; 11. First conveying mechanism; 1101. Connecting rod; 12. Mounting frame; 13. Lifting mechanism; 14. First gear; 1401. First transmission rod; 15. Sliding block; 16. Protective frame; 17. Motor; 18. Second transmission rod; 19. Second gear; 20. First heat-insulating and protective mechanism; 21. Second conveying mechanism; 22. A shell; 2201, a feeding channel; 23, a third conveying mechanism; 24, a fourth conveying mechanism; 25, a sixth conveying mechanism; 26, a second heat insulation protection mechanism; 27, a hot air circulation machine; 2701, a hot air output pipe; 2702, a hot air input pipe; 28, a vibrating feeding device; 29, a seventh conveying mechanism; 30, a second shell; 3001, a first output pipe; 31, a circulating pump; 3101, a heat input pipe; 3102, a heat output pipe; 32, a heat input plate; 33, a heat output plate; 34, a drying device; 35, a first connecting pipe; 36, a pipe sleeve; 37, a second connecting pipe; 38, a liquid output pipe; 39, a cold air output pipe; 40, a water tank; 4001, a second output pipe; 41, a heat exchange chamber. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0040] like Figure 1~Figure 5 As shown, a hot air circulation device in one embodiment of the present invention comprises a first box body 1 and a second box body 2, wherein the second box body 2 is installed inside the first box body 1, and a heat-blocking barrier 3 is fixedly connected between the outer wall of the second box body 2 and the inner wall of the first box body 1. The first box body 1, the second box body 2 and the heat-blocking barrier 3 cooperate to form a first cavity 4, a second cavity 5 and a third cavity 6 in the first box body 1. The first cavity 4, the second cavity 5 and the third cavity 6 can dry sweet potatoes respectively, and different temperatures and humidities can be set, so that the three stages of drying can be realized in the same device and in the same time period, and the drying efficiency of sweet potatoes can be greatly improved.

[0041] Specifically, Figure 1 to Figure 5As shown, a hot air circulation machine 27 is installed on one side of the first box 1. The hot air circulation machine 27 can generate hot air and make the hot air have a certain humidity. A hot air output pipe 2701 and a hot air input pipe 2702 are installed between the hot air circulation machine 27 and the first box 1. The hot air output pipe 2701 is used to transport hot air into the second box 2, and the hot air input pipe 2702 is used to recycle the hot air that has dried the sweet potatoes. The hot air forms a cycle in the second box 2 to complete the drying of the sweet potatoes.

[0042] The second cavity 5 is located in the second box 2, and the first cavity 4 and the third cavity 6 are respectively located on both sides of the second box 2. During the circulation drying process of the second box 2, the heat in the hot air will be transferred to the first cavity 4 and the third cavity 6, and the first cavity 4 and the third cavity 6 can be heated.

[0043] like Figure 1 to Figure 5 As shown, a first conveying mechanism 11 is installed in the first box body 1. The first conveying mechanism 11 is specifically a mesh belt conveyor. The aperture of the mesh belt conveyor is smaller than the size of the sweet potatoes required for drying. The hot air can pass through as much as possible and the sweet potatoes will not fall from the mesh belt conveyor. The hot air can fully contact the sweet potatoes, which is convenient for drying the sweet potatoes and helps to improve the efficiency of drying the sweet potatoes.

[0044] like Figure 1 to Figure 5 As shown, a temperature control mechanism is fixedly connected to the second box 2, and the temperature control mechanism cooperates with the first conveying mechanism 11 to control the efficiency of heat transfer in the hot air to both sides. In this embodiment, the temperature control mechanism is a baffle 201, which is located between the second box 2 and the first conveying mechanism 11, and the baffle 201 is also fixedly connected between adjacent single-layer first conveying mechanisms 11. A channel for sweet potatoes to pass through is formed between the baffle 201 and the first conveying mechanism 11, and the baffle 201 is fixedly connected to one side of the second box 2. By adding a baffle 201 between the second cavity 5 and the third cavity 6, the heat exchange between the second cavity 5 and the third cavity 6 is reduced, so that the temperature in the second cavity 5 can be maintained at the highest, the temperature in the first cavity 4 is lower than the temperature in the second cavity 5, and greater than the temperature in the third cavity 6, and a hot air circulation device with multiple temperature intervals is obtained.

[0045] Preferably, the temperature control mechanism can be a sliding heat preservation door (not shown in the figure), which can be automatically folded or stored according to temperature requirements, and the opening and closing size of the heat preservation door can be controlled to change the size of the connection between the second cavity 5 and the first cavity 4 or the second cavity 5 and the third cavity 6, and change the effective contact surface for heat exchange between the second cavity 5 and the first cavity 4 or the second cavity 5 and the third cavity 6, and control the temperature transfer between the first cavity 4, the second cavity 5, and the third cavity 6, so as to control the temperature in the first cavity 4, the second cavity 5, and the third cavity 6. Of course, the temperature control mechanism can also be other control methods, which can realize the control of the temperature transfer between the first cavity 4, the second cavity 5, and the third cavity 6.

[0046] like Figure 1 to Figure 5 As shown, a box air circulation mechanism 10 is installed in the second box 2, and the box air circulation mechanism 10 matches the hot air circulation machine 27 to realize the circulation of hot air in the second box 2. The box air circulation mechanism 10 includes an air outlet mechanism 1001 and an air inlet mechanism 1002, the air outlet mechanism 1001 is installed on the bottom wall of the second box 2, and the air inlet mechanism 1002 is installed on the top wall of the second box 2. The air outlet mechanism 1001 is connected to the hot air output pipe 2701, and the air outlet mechanism 1001 is used to output hot air. The air inlet mechanism 1002 is connected to the hot air input pipe 2702 for recovering hot air. The box air circulation mechanism 10 and the hot air circulation machine 27 can realize the circulation of hot air. The hot air output by the air outlet mechanism 1001 passes through each layer of the first conveying mechanism 11, and the sweet potatoes on the first conveying mechanism 11 exchange heat with the hot air to achieve drying of the sweet potatoes. The air inlet mechanism 1002 recovers the sweet potatoes after heat exchange and transports them back to the hot air circulation machine 27 through the hot air input pipe 2702 to achieve circulation of the hot air.

[0047] Since the first conveying mechanism 11 is multi-layered, hot air blows from bottom to top and exchanges heat with the sweet potatoes. The hot air closer to the air inlet mechanism 1002 will gradually become lower in temperature than the temperature of the bottom layer when it contacts the sweet potatoes. If the upper and lower layers of sweet potatoes are attached to each other, it is easy to cause the upper and lower layers of sweet potatoes to be dried at different degrees. When the sweet potatoes are dried at different degrees, the color of their surfaces will also be significantly different, which is not conducive to improving the quality of dried sweet potatoes. To solve the above problems, Figures 1 to 8 As shown, a circulating air plate 7 is installed between each layer of the first conveying mechanism 11, and the circulating air plate 7 is matched with the hot air circulation machine 27. The lower end surface of the circulating air plate 7 can recover hot air, and the upper end surface can output hot air. Multiple circulating air plates 7 cooperate with the box circulating air mechanism 10 to blow hot air evenly onto each layer of sweet potatoes, so that each layer of sweet potatoes can be dried relatively evenly, and the drying degree of the sweet potatoes can be as similar as possible, thereby reducing the situation where the quality of the dried sweet potatoes is affected by inconsistent drying degrees of the sweet potatoes.

[0048] like Fig.12As shown, the circulating air plate 7 includes a circulating air outlet 701 and a circulating air inlet 702, the circulating air outlet 701 is opened at the upper end of the first box body 1, and the circulating air inlet 702 is opened at the lower end of the first box body 1, and an air outlet pipe 8 matching the circulating air outlet 701 is fixedly connected in the circulating air plate 7. The other end of the air outlet pipe 8 is connected to the hot air output pipe 2701, and the air outlet pipe 8 cooperates with the hot air output pipe 2701 to realize the hot air output of the circulating air outlet 701. An air inlet pipe 9 matching the circulating air inlet 702 is fixedly connected in the circulating air plate 7, and the other end of the air inlet pipe 9 is connected to the hot air input pipe 2702, and the air inlet pipe 9 cooperates with the hot air input pipe 2702 to realize the recovery of hot air.

[0049] Preferably, a filter (not shown) may be provided on the hot air input pipe 2702, and the impurities generated during the sweet potato drying process may be filtered out through the filter to prevent the impurities generated during the sweet potato drying process from circulating in the hot air and affecting the quality of the dried sweet potatoes. This ensures that the surface of the finally obtained dried sweet potatoes does not have impurities, which is beneficial to improving the quality of the dried sweet potatoes after drying.

[0050] Preferably, the hot air circulation machine 27 can also perform backblowing, which can help improve the quality of the dried sweet potatoes. For example, during the drying process of the sweet potatoes, the sweet potatoes need to be dried in the second box 2 for one hour using the hot air circulation machine 27, and the hot air circulation machine 27 can blow the sweet potatoes on the front side for half an hour and on the back side for half an hour, so that the drying degree of the front side and the back side of the sweet potatoes are as consistent as possible, thereby improving the quality of the dried sweet potatoes.

[0051] In order to solve the problem that the hot air can only blow on one side during the circulation process, such as Figures 1 to 11 As shown, the upper end of the first conveying mechanism 11 is fixedly connected with a connecting rod 1101, and the number of the connecting rods 1101 is four, and the connecting rods 1101 pass through the first box body 1 upward. A mounting frame 12 matching the connecting rod 1101 is fixedly connected to the first box body 1, and a lifting mechanism 13 is installed on the mounting frame 12. The lifting mechanism 13 and the connecting rod 1101 are detachably connected. The connecting rod 1101 can be lifted upward by the lifting mechanism 13, and the connecting rod 1101 moves upward with the first conveying mechanism 11. The first conveying mechanism 11 moves the sweet potatoes upward, and enables the sweet potatoes to contact the surface of the air inlet mechanism 1002 or the surface of the circulating air inlet 702. During the circulation of the hot air, the temperature of the surface of the air inlet mechanism 1002 and the surface of the circulating air inlet 702 will rise and be maintained. The upper surface of the sweet potato is in contact with the surface of the air inlet mechanism 1002 and the surface of the circulating air inlet 702, so that the upper surface of the sweet potato is heated and dried in contact, which can make up for the situation that the upper surface of the sweet potato is not in direct contact with the circulating air, resulting in inconsistent drying degrees of the front and back of the dried sweet potato. The temperature retained on the surface of the circulating air inlet 702 and the air inlet mechanism 1002 is used to further dry the front of the sweet potato.

[0052] like Figures 1 to 11 As shown, a chute 101 is provided on one side wall of the first box body 1, a slider 15 is slidably connected in the chute 101, a plurality of first gears 14 matching the first conveying mechanism 11 are rotatably connected to the slider 15, and a first transmission rod 1401 is fixedly connected between the first gear 14 and a roller at one end of the first conveying mechanism 11. A protection frame 16 is fixedly connected to the side of the chute 101 away from the first box body 1, a motor 17 is fixedly connected to the upper end of the protection frame 16, a second transmission rod 18 matching the motor 17 is rotatably connected to the protection frame 16, and a second gear 19 meshing with the first gear 14 is fixedly connected to the second transmission rod 18. The motor 17 rotates the second transmission rod 18, the second transmission rod 18 rotates the second gear 19, the second gear 19 rotates the first gear 14, and the first gear 14 rotates with the roller through the first transmission rod 1401, thereby driving the first conveying mechanism 11. That is, the multi-layer first conveying mechanism 11 is synchronously driven by the motor 17.

[0053] like Figure 10-11 As shown, since the slider 15 is slidably connected in the chute 101, the slider 15 is brought upward by the first conveying mechanism 11 to slide upward, and the slider 15 brings the protection frame 16 upward during the upward sliding process, and the protection frame 16 brings the motor 17, the second transmission rod 18 and the second gear 19 upward. Since the slider 15 is slidably connected to the chute 101, a first heat insulation protection mechanism 20 is installed between the side wall of the chute 101 and the slider 15. The first heat insulation protection mechanism 20 is a heat insulation material, which can reduce the loss of heat from the chute 101.

[0054] like Figure 1 to Figure 7 As shown, a feeding mechanism is fixedly connected to one side of the first box 1, and the feeding mechanism can deliver the sweet potatoes to be dried to the first conveying mechanism 11 in the first box 1 for drying. Among them, a second conveying mechanism 21 is installed inside the first box 1. The number of layers and height of the second conveying mechanism 21 match those of the first conveying mechanism 11. The second conveying mechanism 21 is trapezoidal, and the length of each layer of the conveying mechanism is different, which is convenient for receiving the sweet potatoes conveyed by the feeding mechanism. The second conveying mechanism 21 can evenly convey the received sweet potatoes to the first conveying mechanism 11.

[0055] Specifically, Figure 1 to Figure 7As shown, the feeding mechanism includes a first shell 22, and the first shell 22 is provided with a sixth conveying mechanism 25, a fourth conveying mechanism 24 and a third conveying mechanism 23 in sequence from the end away from the first box body 1 to the end close to the first box body 1. Through the cooperation of the sixth conveying mechanism 25, the fourth conveying mechanism 24 and the third conveying mechanism 23 and the first shell 22, the external sweet potatoes can be conveyed into the first box body 1. A feeding channel 2201 matching the size of the sweet potato is fixedly connected to the first shell 22, and the aperture of the feeding channel 2201 is slightly larger than the volume of the sweet potato. The sweet potato can fall from the feeding channel 2201 and enter the second conveying mechanism 21 at a different layer height, and the second conveying mechanism 21 conveys the sweet potato to the first conveying mechanism 11.

[0056] Since the first box body 1 is connected to the feeding mechanism, in order to reduce the loss of heat from the hot air in the first box body 1, a plurality of second heat insulation protection mechanisms 26 matching the third conveying mechanism 23 are fixedly connected to the inner wall of the first shell 22. The second heat insulation protection mechanisms 26 are in contact with the surface of the third conveying mechanism 23. When sweet potatoes pass by, the second heat insulation protection mechanisms 26 are driven by the sweet potatoes to bend, allowing the sweet potatoes to pass. When no sweet potatoes pass by, the second heat insulation protection mechanisms 26 act as a curtain to block the loss of heat, thereby reducing the loss of heat in the first box body 1.

[0057] Preferably, the feeding channel 2201 can be used as a temporary storage bin. The gap between the lower end surface of the feeding channel 2201 and the surface of the second conveying mechanism 21 is slightly larger than the size of a sweet potato. When the second conveying mechanism 21 is driven, the second conveying mechanism 21 moves forward with the sweet potato. The sweet potato in the feeding channel 2201 moves downward due to gravity and is taken away by the second conveying mechanism 21 in turn, and then transported to the first conveying mechanism 11 by the second conveying mechanism 21. When the sweet potato is in the feeding channel 2201, its temperature is lower than that in the first box 1. When it enters the first box 1 from the feeding channel 2201, the temperature of the sweet potato in contact changes from low to high. The sweet potato moves from a lower temperature to a higher temperature, which can prevent the sweet potato from directly contacting the high temperature and affecting the drying of the sweet potato, and is conducive to improving the quality of the dried sweet potato.

[0058] like Figure 1 to Figure 6 As shown, a second shell 30 is further provided at one end of the first box body 1 away from the feeding mechanism, and a seventh conveying mechanism 29 is installed inside the second shell 30. When the sweet potatoes are dried on the first conveying mechanism 11, the first conveying mechanism 11 is driven by the motor 17 to move, and the sweet potatoes on the first conveying mechanism 11 can fall onto the seventh conveying mechanism 29, and then the seventh conveying mechanism 29 conveys the dried sweet potatoes.

[0059] Preferably, a heat insulation curtain (not shown) is provided on one end of the second shell 30 close to the first box body 1 . The heat insulation curtain has the same function and material as the second heat insulation protection mechanism 26 , and can reduce the loss of heat in the third cavity 6 .

[0060] The dried sweet potatoes have a certain temperature during being transported by the seventh transport mechanism 29, and the dried sweet potatoes need to be cooled. If the dried sweet potatoes are directly transported by the seventh transport mechanism 29, natural cooling or other cooling methods are used to cool the dried sweet potatoes, which will cause waste of sweet potato waste heat, and it will take a certain amount of time to cool the sweet potatoes. In order to solve the above problems, a heat transport mechanism is provided between the second shell 30 and the feeding mechanism. The heat transport mechanism extracts the waste heat of the dried sweet potatoes to achieve the cooling and cooling of the dried sweet potatoes, and the extracted waste heat is transported to the feeding mechanism. The waste heat realizes the pre-drying of the sweet potatoes in the first shell 22. The temperature in the feeding mechanism is lower than the temperature in the feeding channel 2201. The sweet potatoes enter the feeding mechanism, the feeding channel 2201, and the first box 1. The temperature of the sweet potatoes increases successively, which is beneficial to the drying of the sweet potatoes and the improvement of the quality of the dried sweet potatoes.

[0061] like Figure 2 As shown, the heat transport mechanism includes a circulation pump 31, and a heat input pipe 3101 and a heat output pipe 3102 are installed on the circulation pump 31. A heat input plate 32 is installed at one end of the heat input pipe 3101 away from the circulation pump 31. The heat input plate 32 is installed inside the second shell 30 and is a heat recovery end. A heat output plate 33 is installed at one end of the heat output pipe 3102 away from the circulation pump 31. The heat output plate 33 is installed on the first shell 22 and is a heat output end. The heat input plate 32 recovers the heat after drying and transports it to the heat input pipe 3101, the circulation pump 31, and the heat output pipe 3102 in sequence, and finally outputs it to the first shell 22 by the heat output plate 33. The hot air is located in the first shell 22 and can be used to pre-dry the sweet potatoes in the first shell 22. The dried sweet potatoes are cooled, and the excess heat can be used to pre-dry the undried sweet potatoes, which is beneficial to energy saving and environmental protection. The temperature of the sweet potatoes is gradually increased from low to high, which is beneficial to improving the quality of the dried sweet potatoes.

[0062] like Figure 1 to Figure 5As shown, a vibrating feeding device 28 is installed on one side of the feeding mechanism. The sweet potatoes are placed on the vibrating feeding device 28, which can drain the moisture on the surface of the sweet potatoes and remove impurities on the surface of the sweet potatoes by vibration. The vibrating feeding device 28 can realize vibration feeding, which can make the sweet potatoes fall on the sixth conveying mechanism 25 more evenly, and then the sweet potatoes are sent to the second conveying mechanism 21 through the sixth conveying mechanism 25, the fourth conveying mechanism 24, and the third conveying mechanism 23, so as to avoid the situation where the sweet potatoes are stacked together as much as possible, and avoid the situation where the drying effect is poor. In addition, during the vibration process of the sweet potatoes, the moisture on the surface of the sweet potatoes can penetrate into the inside of the sweet potatoes, so that the sweet potatoes can absorb a certain amount of moisture, but not completely drain the moisture, so that the dryness and wetness of the dried sweet potatoes are relatively uniform, thereby also being able to improve the quality of the dried sweet potatoes.

[0063] like Figures 1 to 11 As shown, during the drying process of sweet potatoes, the humidity needs to be kept within a certain range. Generally, the drying humidity in the first stage is maintained at 60% to 70%, the drying humidity in the second stage is gradually reduced, and the drying humidity in the third stage is maintained at 10% to 20%, which can be adjusted according to the situation of sweet potatoes. To this end, the hot air circulation device also includes a cold drying mechanism, which is used with a humidity sensor (not shown in the figure) to control the humidity of the air in the first box 1 and the second box 2. Specifically, the cold drying mechanism can extract the hot air with high humidity in the first cavity 4, the second cavity 5 and the third cavity 6 respectively, and the hot air circulation machine 27 inputs the same amount and the same temperature of hot air, and the extracted hot air is cooled and dried by the cold drying mechanism and discharged. Setting a cold drying mechanism can avoid the situation where the hot air is directly discharged to affect the ambient temperature, and avoid the impact of the discharged hot air on the environment. The cold drying mechanism can adjust the temperature of the cold and dry hot air. In a high temperature environment, the temperature of the cold and dry hot air of the cold drying mechanism can be lowered, and the obtained cold air is output to the workshop, which is beneficial to energy saving and environmental protection. In a low temperature environment, the hot air of the cold drying mechanism can be adjusted to a higher level, and the dried gas can be output to the workshop, which is beneficial to raising the temperature of the workshop.

[0064] Specifically, Figures 1 to 11As shown, the cold drying mechanism includes a drying device 34, and three first connecting pipes 35 are installed on the first box 1, and the three first connecting pipes 35 are connected to the first cavity 4, the second cavity 5 and the third cavity 6 respectively. A sleeve 36 is installed at one end of the first connecting pipe 35 away from the first cavity 4, the second cavity 5 and the third cavity 6, and the sleeve 36 is sleeved on the heat output pipe 3102, and a heat exchange cavity 41 is formed between the heat output pipe 3102 and the sleeve 36. The hot air discharged from the first cavity 4, the second cavity 5 and the third cavity 6 is stored in the heat exchange cavity 41, and can exchange heat with the hot air in the heat output pipe 3102, so as to achieve the heating of the heat output pipe 3102 and the heating of the hot air in the heat output pipe 3102. Increasing the temperature of the hot air in the heat output pipe 3102 is conducive to pre-drying the sweet potatoes.

[0065] Furthermore, if Figures 1 to 11 As shown, a second connecting pipe 37 is installed between the drying device 34 and the pipe sleeve 36. After the hot air is heat exchanged, it is transported to the drying device 34 by the second connecting pipe 37. A liquid output pipe 38 and a cold air output pipe 39 are installed on the drying device 34. The cold air output pipe 39 transports the cold air to the second shell 30 which is hollow, and exchanges heat with the second shell 30, thereby reducing the temperature of the space in the second shell 30, which is conducive to cooling the dried sweet potatoes. The liquid output pipe 38 transports the cold liquid formed by cold drying to a water tank 40 installed at the lower end of the second shell 30. The water tank 40 temporarily stores the cold liquid, and the cold liquid can also exchange heat with the second shell 30, which is conducive to reducing the temperature of the second shell 30.

[0066] like Figure 3 As shown, a first output pipe 3001 is installed on the second shell 30, and a second output pipe 4001 is installed on the water tank 40. The first output pipe 3001 and the second output pipe 4001 output the cold air and cold liquid after heat exchange respectively.

[0067] It is worth noting that in this embodiment, the so-called sweet potatoes are processed sweet potatoes, that is, sweet potato strips, sweet potato slices, sweet potato cubes, etc., rather than unprocessed sweet potatoes. Moreover, the hot air circulation device disclosed in the present invention can not only dry sweet potatoes, but also dry other products.

[0068] When in use, first, the processed sweet potatoes are placed on the vibrating feeding device 28, which can vibrate and drain the sweet potatoes, make the moisture absorbed by the sweet potatoes uniform, disperse the sweet potatoes, and shake them onto the sixth conveying mechanism 25. The sweet potatoes enter the first shell 22 through the sixth conveying mechanism 25, and are successively conveyed to the feeding channel 2201 by the fourth conveying mechanism 24 and the third conveying mechanism 23. The sweet potatoes enter the feeding channel 2201 and fall on the second conveying mechanism 21 respectively, and the second conveying mechanism 21 can convey the sweet potatoes to the first conveying mechanism 11. At this time, the sweet potatoes are located in the first cavity 4 for the first stage of drying. After the first stage of drying is completed, the first conveying mechanism 11 conveys the sweet potatoes to the second cavity 5 for the second stage of drying. After the second stage of drying is completed, the first conveying mechanism 11 conveys the sweet potatoes to the third cavity 6 for the third stage of drying. The first stage to the third stage can be completed in the same device. After the sweet potatoes are dried, they are transported to the seventh transport mechanism 29 by the first transport mechanism 11, and then the sweet potatoes are transported out by the seventh transport mechanism 29. During the process of transporting the sweet potatoes out, the heat they carry is extracted by the heat transport mechanism, and the heat is transported to the first shell 22, so that the sweet potatoes in the first shell 22 can be pre-dried, and the dried sweet potatoes are cooled at the same time. In this process, the person only needs to put the sweet potatoes on the vibrating feeding device 28 and wait for the seventh transport mechanism 29 to output the sweet potatoes, and does not need to open the hot air circulation device as a whole to take the sweet potatoes. That is, the steps of drying the sweet potatoes become simpler, and the heat in the hot air circulation device will not cause heat loss during the process of taking out the sweet potatoes, reducing the heat loss, thereby reducing the power consumption used by the hot air circulation device to dry the sweet potatoes, which is beneficial to energy saving and environmental protection.

[0069] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0070] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hot air circulation device, characterized in that: include: A first box and a second box, wherein the second box is arranged inside the first box, a heat-blocking barrier is fixedly connected between the inner wall of the first box and the outer wall of the second box, and the first box, the second box and the heat-blocking barrier cooperate to form a first cavity, a second cavity and a third cavity; A hot air circulation machine, the hot air circulation machine is installed on one side of the first box, the hot air circulation machine is used to circulate hot air and can control the humidity of the input hot air, and a box circulation air mechanism matching the hot air circulation machine is installed on the side wall of the second box, the box circulation air mechanism cooperates with the hot air circulation machine to realize the circulation of hot air into the second box; A first conveying mechanism, wherein the first conveying mechanism is installed inside the first box, and one end of the first conveying mechanism sequentially passes through the first cavity, the second cavity, and the third cavity; A vibrating feeding device, the vibrating feeding device is located on one side of the first box body, and a feeding mechanism is installed between the vibrating feeding device and the first conveying mechanism; The first conveying mechanism is a multi-layer conveying mechanism, and a circulating air plate is installed between each layer of the conveying mechanism; The upper end surface of the circulating air plate is provided with a circulating air outlet, the lower end surface of the circulating air plate is provided with a circulating air inlet, an air outlet pipe for conveying gas to the circulating air outlet is fixedly connected inside the circulating air plate, and the other end of the air outlet pipe is connected to the hot air circulation machine; The inside of the circulating air plate is fixedly connected with an air inlet pipe for extracting the gas in the circulating air inlet, and the other end of the air inlet pipe is connected to the hot air circulation machine; A plurality of connecting rods are fixedly connected to the upper end of the first conveying mechanism, and the connecting rods pass through the upper wall of the first box body. A mounting frame matching the connecting rods is fixedly connected to the upper end surface of the first conveying mechanism, and a lifting mechanism matching the connecting rods is installed on the mounting frame to change the position of the first conveying mechanism.

2. A hot air circulation device according to claim 1, characterized in that: A transmission mechanism is fixedly connected to one side of the first conveying mechanism, a slide groove matching the transmission mechanism is provided on the first box body, and the transmission mechanism is vertically slidably connected in the slide groove; The transmission mechanism includes a slider, the slider is slidably connected in the slide groove, the slider is rotatably connected with a first gear, a first transmission rod is fixedly connected between the first gear and the first conveying mechanism, and the first transmission rod is fixedly connected to a roller at one end of the first conveying mechanism; One end of the slider away from the first box body is fixedly connected to a protective frame, a second transmission rod is rotatably connected to the protective frame, a second gear matching the first gear is fixedly connected to the second transmission rod, and a motor for driving the second transmission rod to rotate is fixedly connected to the upper end of the protective frame.

3. The hot air circulation device according to claim 1, characterized in that: A second housing is fixedly connected to one end of the first housing away from the vibrating feeding device, and a seventh conveying mechanism matching the first conveying mechanism is fixedly connected to the interior of the second housing; The feeding mechanism comprises a first shell, the first shell is fixedly connected to one end of the first box body away from the second shell, and the sixth conveying mechanism, the fourth conveying mechanism and the third conveying mechanism are fixedly connected in sequence in the first shell; A second conveying mechanism matching the first conveying mechanism is fixedly connected in the first box body, and a plurality of feeding channels matching the second conveying mechanism are fixedly connected to one end of the first shell body close to the second conveying mechanism.

4. A hot air circulation device according to claim 3, characterized in that: A heat recovery mechanism is provided between the second shell and the feeding mechanism, and the heat recovery mechanism is used to recover the heat of the dried product and transport the heat to the first shell to achieve pre-drying of the product in the first shell.

5. A hot air circulation device according to claim 4, characterized in that: The heat recovery mechanism comprises a circulation pump, the upper end of which is fixedly connected with a heat input pipe and a heat output pipe, the end of the heat input pipe away from the circulation pump is fixedly connected with a heat input plate, and the heat input plate is fixedly connected in the second shell; One end of the heat output pipe away from the circulation pump is fixedly connected with a heat output plate, and the heat output plate is fixedly connected to the first shell.

6. A hot air circulation device according to claim 5, characterized in that: It also includes a drying device, wherein the first box is fixedly connected with a first connecting pipe communicating with the first cavity, the second cavity and the third cavity, a pipe sleeve is installed at one end of the first connecting pipe away from the first box, the pipe sleeve is sleeved on the heat output pipe, the pipe sleeve and the heat output pipe form a heat exchange cavity, and a second connecting pipe is installed between the pipe sleeve and the drying device; The second shell is hollow, and a cold air output pipe is installed between the second shell and the drying device, through which cold air can be transported into the second shell; One end of the second shell is fixedly connected with a first output pipe.

7. A hot air circulation device according to claim 6, characterized in that: A water tank is detachably mounted on the lower end of the second shell, a liquid output pipe is mounted between the water tank and the drying device, and the water tank can achieve heat exchange with the second shell.

8. The hot air circulation device according to claim 1, characterized in that: Temperature control mechanisms for controlling the heat transfer of hot air are fixedly connected to both sides of the second box.

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