Heat pump type indoor tobacco dryer

Abstract

The invention relates to the technical field of drying equipment, and provides a heat pump type tobacco indoor dryer which comprises a base, a drying room body, a partition plate and a heat pump assembly, the base is arranged at the bottom of the drying room body, and the partition plate is arranged in the drying room body and divides the drying room body into a first drying room and a second drying room; the heat pump assembly comprises an evaporator, a compressor and a condenser, the evaporator and the compressor are connected and arranged in the first drying room, the condenser is arranged at the top of the second drying room and connected with the compressor, and the second drying room is used for drying tobacco; wherein one side of the first drying room is provided with a first iron gauze, the first iron gauze is close to the evaporator, and the first drying room is communicated with external air through the first iron gauze. The tobacco drying device has the effect of conveniently drying tobacco.

Description

Technical Field

[0001] The present application relates to the technical field of drying equipment, and in particular to a heat pump type indoor tobacco drying machine. Background Art

[0002] Tobacco, a key raw material for tobacco, belongs to the genus Nicotiana in the Solanaceae family. It is an annual or limited perennial herb. After harvesting, it needs to be dried by airing or baking before it can be processed into finished products. Tobacco dryers are key equipment in the tobacco processing process, primarily used to dry the harvested tobacco leaves, reducing their moisture content to a level suitable for storage and subsequent processing (typically around 12%). Their core principle is to efficiently remove moisture from the tobacco leaves through the combined effects of heat transfer and mass transfer (evaporation and diffusion).

[0003] Existing heat pump dryers operate based on the reverse Carnot cycle (similar to the refrigeration principle of air conditioning, but in reverse). By consuming a small amount of electricity to drive the compressor, heat from the air is transferred to the drying chamber, achieving low-temperature and high-efficiency tobacco drying. The core process is as follows: 1. Evaporator heat absorption: The low-temperature, low-pressure refrigerant (such as R22 or R410A) absorbs heat from the outside air in the evaporator and evaporates into a gas. 2. Compressor work: The gaseous refrigerant is compressed by the compressor, becoming a high-temperature, high-pressure gas, raising its temperature to 50-90°C (depending on the model). 3. Condenser heat release: The high-temperature, high-pressure refrigerant enters the condenser in the drying chamber, releasing heat to heat the air and condensing itself into a liquid. 4. Expansion valve pressure reduction: The liquid refrigerant passes through the expansion valve, reducing its pressure and re-entering the evaporator, completing the cycle.

[0004] Most heat pump dryers currently on the market utilize an air-source heat pump system, which absorbs heat from the external environment and transfers it to the material being heated. However, this type of equipment often requires a separate machine room to house the heat pump components, and the hot air must be transported to the drying room via air ducts. This approach increases system complexity and cost, while also limiting the effective use of heat energy, and thus requires improvement. Summary of the Invention

[0005] In order to facilitate tobacco drying and improve drying efficiency and economic benefits, the present application provides a heat pump type indoor tobacco dryer.

[0006] The present application provides a heat pump type indoor tobacco drying machine with the following technical solutions: A heat pump type indoor tobacco dryer comprises a base, a drying chamber body, a partition plate, and a heat pump assembly. The base is arranged at the bottom of the drying chamber body. The partition plate is arranged in the drying chamber body and divides the drying chamber body into a first drying chamber and a second drying chamber. The heat pump assembly comprises an evaporator, a compressor, and a condenser. The evaporator and the compressor are connected and both are arranged in the first drying chamber. The condenser is arranged at the top of the second drying chamber and connected to the compressor. The second drying chamber is used to dry tobacco. A first wire mesh is provided on one side of the first drying room, the first wire mesh is close to the evaporator, and the first drying room is connected to the outside air through the first wire mesh.

[0007] By adopting this technical solution, a partition divides the main drying room into a first drying room and a second drying room. When tobacco needs to be dried, it is first placed in the second drying room. The evaporator is then activated, where the low-temperature, low-pressure refrigerant absorbs heat from the outside air and evaporates into a gaseous state. The gaseous refrigerant is compressed by the compressor, becoming a high-temperature, high-pressure gas. The high-temperature, high-pressure refrigerant then enters the condenser in the second drying room, releasing heat to heat the air and condensing itself into a liquid. The heat released by the condenser heats the air in the second drying room, thus drying the tobacco.

[0008] By installing the drying heat pump directly inside the drying room, and exchanging heat with the outside world through windows like the first wire mesh, this approach reduces heat loss during transmission and improves thermal efficiency. A reverse Carnot cycle is used to extract heat from the surrounding air, which is then used to preheat the tobacco leaves to be dried.

[0009] Preferably, the inner walls of the first drying room and the second drying room are both provided with a heat-insulating layer, and the heat-insulating layer is made of heat-insulating material.

[0010] By adopting the above technical solution, the insulation layer is usually composed of materials with low thermal conductivity (such as rock wool, polyurethane foam, aluminum silicate fiber, etc.), which can effectively block the heat conduction, heat convection and heat radiation between the high temperature inside the drying room and the low temperature outside, thereby improving the drying effect of the tobacco slices.

[0011] Preferably, a fan is further included, a first mounting hole is formed through the side wall of the first drying room, the fan is arranged on the first mounting hole, the fan is connected to the heat pump assembly, and is used to supply air for cooling the second drying room; The second drying room further comprises a second wire mesh, a second installation hole is formed through the side wall of the second drying room, and the second wire mesh is arranged at the second installation hole.

[0012] Using this technical solution, heat pump cooling and ventilation involves cooling ambient air to a set temperature (e.g., 15-25°C) through a heat pump system and then delivering it to the cooling area via a fan. This process utilizes the principle of the reverse Carnot cycle, transferring heat through the refrigerant's phase change (gas to liquid to gas), thereby achieving cooling.

[0013] The low-temperature, low-pressure gaseous refrigerant is drawn into the compressor and compressed into a high-temperature, high-pressure gas. This high-temperature, high-pressure gaseous refrigerant enters the condenser, where it releases heat to the second drying chamber and condenses into a high-temperature, high-pressure liquid. The high-temperature, high-pressure liquid refrigerant passes through the expansion valve (throttling element), where its pressure is suddenly reduced, causing it to expand and become a low-temperature, low-pressure gas-liquid mixture.

[0014] Low-temperature, low-pressure refrigerant enters the evaporator. A fan drives ambient air (or circulating air) across the evaporator's surface, where heat is absorbed by the refrigerant. After absorbing the heat, the refrigerant evaporates into a low-temperature, low-pressure gas, which re-enters the compressor, completing the cycle. The cooled air is pressurized by the fan and delivered to the second drying room through a distribution system such as air ducts or nozzles. There, it undergoes convection heat exchange with the hot tobacco, achieving cooling. The cooler air naturally sinks, allowing the hot air in the second drying room to escape through the second wire mesh into the atmosphere.

[0015] Due to the design of traditional heat pump dryers, the heat pump device is separated from the drying room, resulting in energy transmission losses. Furthermore, because the cooling process directly uses untreated ambient air, the cooling effect of the tobacco sheets is unstable. This makes it difficult to maintain ideal cooling conditions, especially when the temperature fluctuates significantly. The fan design of this application enables the entire system to achieve continuous drying and cooling operations with less energy consumption, solving the problem of unstable cooling effect caused by ambient temperature fluctuations.

[0016] Preferably, it also includes a material door and a strap, the material door is lifted and lowered on the second drying room, and is used for allowing the racks containing tobacco to enter and exit the second drying room; the strap is rotatably connected to the second drying room and is located at the lower end of the material door, the strap is tilted in the direction away from the second drying room, and is used for allowing the racks to move from the ground to the second drying room.

[0017] By adopting the above technical solution, before drying, when the racks containing tobacco need to be sent to the second drying room, since the second drying room is at a certain height from the ground, the material door can be opened first, and then the racks can be pushed upwards along the planks into the second drying room.

[0018] Preferably, it further comprises an observation window, which is provided on the material door and is made of a transparent material.

[0019] By adopting the above technical solution, during the drying process, the staff can see the situation inside the second drying room through the observation window without opening the material door.

[0020] Preferably, it further comprises a linkage component, wherein the linkage component is connected to the material door and the strap at the same time, and when the material door is in a closed state, the strap is attached to the material door; The linkage assembly includes a pull rope, a fixed pulley, a winding wheel, a connecting shaft, a driving motor, a first bevel gear and a second bevel gear. The fixed pulley is rotatably connected to the top of the second drying room, and the winding wheel is rotatably connected to the second drying room and is close to the base. The pull rope passes around the fixed pulley, one end of the pull rope is connected to the upper end of the feed door, and the other end is wound around the winding wheel. The connecting shaft is coaxially arranged with the winding wheel, the driving motor is connected to the connecting shaft and is used to control the rotation of the winding wheel, and the driving motor has a self-locking function; The first bevel gear is coaxially arranged on the connecting shaft, and the second bevel gear is arranged on the rotating shaft of the strap and meshes with the first bevel gear; when the driving motor drives the winding wheel to rotate, the pull rope is wound around the winding wheel, causing the material door to move vertically upward; the first bevel gear drives the second bevel gear to rotate, causing the strap to rotate in a direction close to the ground.

[0021] By adopting the above technical solution, when the material door is in the closed state, the lap plate abuts against the material door, which can prevent the lap plate from being placed on the ground and reduce the floor space. When the drive motor drives the winding wheel to rotate, the pull rope is wound around the winding wheel and exerts a vertical upward pulling force on the material door, causing the material door to open.

[0022] The rotation of the connecting shaft also drives the first bevel gear to rotate. As the second bevel gear meshes with the first bevel gear, it drives the rotating shaft of the slats to rotate, causing the slats to rotate away from the second drying chamber. When the material door is fully opened, the slats are exactly on the ground, allowing the racks in the second drying chamber to move out.

[0023] Preferably, it also includes a storage rack, which includes a frame body and a storage plate. A plurality of rollers are connected to the bottom of the frame body. The storage plate is horizontally arranged and used for placing tobacco. The storage plates are spaced apart along the height direction of the frame body.

[0024] By adopting the above technical solution, the presence of the rollers facilitates the movement of the frame, and the storage plate is used to place tobacco to be dried.

[0025] Preferably, the storage plate includes a first support plate and a second support plate, the first support plate includes a first plate and a second plate, the first plate is fixedly connected to the frame, and the second plate is rotatably connected to the first plate on a side close to the second support plate, and the second plate is rotated by a gas spring; The second support plate is set on the frame by a cylinder lift, and the second support plate includes a third plate and a fourth plate. The third plate is connected to the cylinder piston rod, and the fourth plate is rotatably connected to the third plate on one side close to the first support plate. The rotating axes of the fourth plate and the second plate are parallel. The second plate and the fourth plate are both used to place tobacco, and baffles are provided on the circumference of both plates.

[0026] By adopting the above technical solution, in the traditional tobacco drying process, the position of the tobacco is generally fixed, which has a poor drying effect. By setting the storage plate as the first support plate and the second support plate, the tobacco can be placed on the second plate and the fourth plate.

[0027] In the initial state, the second and fourth plates are both horizontally positioned, with tobacco placed steadily on the second and fourth plates, and the second and fourth plates are on the same horizontal plane. To change the position of the tobacco, the cylinder first controls the entire second support plate to move upward, raising the plane of the fourth plate to a higher level than the plane of the second plate. Then, the gas spring controls the rotation of the fourth plate, and the tobacco on the fourth plate falls onto the second plate under the action of gravity.

[0028] Next, the cylinder controls the entire second support plate to move downward, lowering the fourth plate's plane below the second. A gas spring then rotates the second plate, causing the tobacco on the second plate to fall onto the fourth plate under gravity. This repetitive process changes the tobacco's state and improves the drying process.

[0029] Preferably, a collection box is further included, which is provided with an opening and is located at the bottom of the frame, and is used to receive the tobacco on the storage plate.

[0030] By adopting the above technical solution, the collection box can receive the tobacco that has been dried and cooled on the storage plate and complete the collection. The tobacco on the second plate falls onto the fourth plate, and then the tobacco on the fourth plate falls into the collection box.

[0031] Preferably, it further comprises an electric heating tube, wherein a plurality of the electric heating tubes are arranged in parallel and located in the second drying room, each of the electric heating tubes is close to the condenser and is used to assist in drying the tobacco.

[0032] By adopting the above technical solution, the electric heating tube can generate heat after being powered on, playing a role of auxiliary heating, and drying the tobacco together with the heat released by the condenser, thereby improving the drying effect.

[0033] In summary, this application includes at least one of the following beneficial technical effects: (1) By setting up a base, a drying room body, a partition plate and a heat pump assembly, the partition plate divides the drying room body into a first drying room and a second drying room. When tobacco needs to be dried, the tobacco to be dried is first placed in the second drying room, and then the heat pump assembly is used to heat the second drying room. By directly installing the heat pump for drying inside the drying room body and exchanging heat with the outside through a window such as the first wire mesh, the advantage of this is that the loss of heat energy during transmission is reduced and the thermal efficiency is improved.

[0034] (2) By setting up the take-up board, before drying, first open the material door, and then send the rack containing tobacco into the second drying room along the take-up board. The take-up board can play an auxiliary role.

[0035] (3) By setting up an electric heating tube, the electric heating tube can generate heat after being powered on, which plays a role of auxiliary heating. It can dry the tobacco together with the heat released by the condenser, thereby improving the tobacco drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a structural diagram of a dryer in one embodiment of the present application; Figure 2 This is a structural diagram of a dryer from another perspective in one embodiment of the present application; Figure 3 This is a structural diagram of a dryer in another embodiment of the present application; Figure 4 This is a structural diagram of a dryer from another perspective in another embodiment of the present application; Figure 5 This application Figure 4 An enlarged schematic diagram of the local A in the middle; Figure 6 It is a structural diagram of a storage rack in another embodiment of the present application.

[0037] Figure numerals: 1. base; 2. drying room main body; 21. first drying room; 22. second drying room; 3. partition plate; 4. heat pump assembly; 41. evaporator; 42. compressor; 43. condenser; 5. first wire mesh; 6. fan; 7. second wire mesh; 8. electric heating tube; 9. material door; 10. board; 11. observation window; 12. linkage assembly; 121. pull rope; 122. fixed pulley; 123. winding wheel; 124. connecting shaft; 125. driving motor; 126. first bevel gear; 127. second bevel gear; 13. storage rack; 131. rack body; 132. storage plate; 14. first support plate; 141. first plate; 142. second plate; 15. second support plate; 151. third plate; 152. fourth plate; 16. baffle; 17. roller; 18. cylinder. DETAILED DESCRIPTION

[0038] The following will describe the technical solution of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. The present application can be embodied in many different forms and is not limited to the embodiments described here.

[0039] Throughout the present application, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of this application, unless otherwise specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, integration, or mechanical connections. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this application based on specific circumstances.

[0042] Some embodiments of the present application are described in detail below with reference to the accompanying drawings. In the absence of conflict, those skilled in the art may combine and combine the different embodiments or examples and features of the different embodiments or examples shown in the present application.

[0043] The embodiment of the present application discloses a heat pump type indoor tobacco drying machine. Figure 1 and Figure 2 The dryer includes a base 1, a drying room body 2, a partition 3 and a heat pump assembly 4. The base 1 is fixedly installed on the ground, and the drying room body 2 is fixed on the base 1. The partition 3 is fixedly connected to the inside of the drying room body 2. The partition 3 is arranged along the height direction of the drying room body 2 and divides the drying room body 2 into a first drying room 21 and a second drying room 22. The heat pump assembly 4 includes an evaporator 41, a compressor 42 and a condenser 43. The evaporator 41 and the compressor 42 are connected, and both are installed in the first drying room 21. The condenser 43 is installed on the top of the second drying room 22 and is connected to the compressor 42. The second drying room 22 is used to dry tobacco. Among them, a first wire mesh 5 is fixedly connected to one side of the first drying room 21. The first wire mesh 5 is close to the evaporator 41 and the compressor 42. The first drying room 21 is connected to the outside air through the first wire mesh 5.

[0044] When tobacco needs to be dried, it is first placed in the second drying chamber 22. The evaporator 41 is then activated. The low-temperature, low-pressure refrigerant in the evaporator 41 absorbs heat from the outside air and evaporates into a gas. The gaseous refrigerant is compressed by the compressor 42, becoming a high-temperature, high-pressure gas. The high-temperature, high-pressure refrigerant then enters the condenser 43 in the second drying chamber 22, releasing heat to heat the air and condensing itself into a liquid. The heat released by the condenser 43 heats the air in the second drying chamber 22, thereby drying the tobacco.

[0045] By installing the drying heat pump directly inside the drying chamber body 2 and exchanging heat with the outside world through a window such as the first wire mesh 5, this approach reduces heat loss during transmission and improves thermal efficiency. A reverse Carnot cycle is used to extract heat from the surrounding air, which is then used to preheat the tobacco sheets to be dried.

[0046] Specifically, the inner walls of both the first drying chamber 21 and the second drying chamber 22 are insulated. These insulation layers are made of low-thermal-conductivity materials such as rock wool, polyurethane foam, and aluminum silicate fiber. This effectively blocks heat conduction, convection, and radiation between the high temperature inside the drying chamber and the low temperature outside, thereby improving the drying efficiency of the tobacco leaves. Two fans 6 are also installed in the first drying chamber 21. A first mounting hole is defined through the side wall of the first drying chamber 21, into which the fans 6 are fixedly mounted. The fans 6 are connected to the heat pump assembly 4 and are used to supply cooling air to the second drying chamber 22. A second mounting hole is defined through the side wall of the second drying chamber 22, to which a second wire mesh 7 is fixedly attached. The second drying chamber 22 is connected to the outside air through the second wire mesh 7. Heat pump cooling involves cooling ambient air to a set temperature (e.g., 15-25°C) via the heat pump system and then delivering it to the cooling area via the fans 6. Its core is to use the reverse Carnot cycle principle to achieve heat transfer through the phase change of the refrigerant (gas → liquid → gas), thereby achieving the purpose of cooling.

[0047] The second drying room 22 is further equipped with a plurality of electric heating tubes 8, each of which is parallel to each other and close to the condenser 43. The electric heating tubes 8 are used to assist in drying the tobacco. When powered on, the electric heating tubes 8 generate heat, which serves as auxiliary heating. Together with the heat released by the condenser 43, the heat is used to dry the tobacco, thereby improving the drying effect.

[0048] Reference Figure 3 and Figure 4 In some embodiments, a lifting material door 9 is installed on the second drying chamber 22. This door 9 can be raised and lowered via a combination of sliders and rails. The door 9 allows tobacco-loaded racks 13 to enter and exit the second drying chamber 22. A rectangular slat 10 is rotatably connected to the bottom of the second drying chamber 22 and is located below the door 9. The slat 10 is tilted away from the second drying chamber 22 and allows the racks 13 to be moved from the horizontal ground into the second drying chamber 22. Before drying, when the tobacco-loaded racks 13 need to be moved into the second drying chamber 22, the height of the second drying chamber 22 is relatively high. To do this, the door 9 can be opened, and the racks 13 can then be pushed upward along the slat 10 into the second drying chamber 22. The feed door is also equipped with an observation window 11 made of a transparent material, such as glass or acrylic. During the drying process, the staff can see the situation inside the second drying room 22 through the observation window 11 without opening the material door 9.

[0049] Combine Figure 5The second drying chamber 22 is also equipped with a linkage assembly 12, which is connected to both the material door 9 and the strap 10. When the material door 9 is closed, the strap 10 is attached to the material door 9. The linkage assembly 12 includes a pull rope 121, a fixed pulley 122, a winding reel 123, a connecting shaft 124, a drive motor 125, a first bevel gear 126, and a second bevel gear 127. The fixed pulley 122 is rotatably connected to the top of the second drying chamber 22. There are multiple fixed pulleys 122. The winding reel 123 is rotatably connected to the second drying chamber 22 and is close to the base 1. The pull rope 121 is simultaneously passed around each fixed pulley 122. One end of the pull rope 121 is fixedly connected to the top of the material feeding door, and the other end is wound around the winding reel 123.

[0050] Connecting shaft 124 and reel 123 are coaxially mounted and rotatably connected to second drying chamber 22. The output shaft of drive motor 125 is connected to connecting shaft 124, controlling the rotation of reel 123. Drive motor 125 has a self-locking function. A first bevel gear 126 is coaxially mounted on connecting shaft 124, while a second bevel gear 127 is coaxially mounted on the rotating shaft of carrier plate 10 and meshes with first bevel gear 126. When drive motor 125 rotates reel 123, pull cord 121 is wound around reel 123, causing material gate 9 to move vertically upward. Simultaneously, first bevel gear 126 drives second bevel gear 127, causing carrier plate 10 to rotate closer to the ground.

[0051] When the material door 9 is in the closed state, the strap 10 abuts against the material door 9, thereby preventing the strap 10 from resting on the ground and reducing the floor space. When the drive motor 125 drives the winding wheel 123 to rotate, the pull rope 121 is wound around the winding wheel 123 and exerts a vertical upward pulling force on the material door 9, causing the material door 9 to open.

[0052] The rotation of the connecting shaft 124 also drives the first bevel gear 126 to rotate. Since the second bevel gear 127 and the first bevel gear 126 are meshed with each other, the rotation axis of the strap 10 is driven to rotate, causing the strap 10 to rotate in a direction away from the second drying chamber 22. When the material door 9 is fully opened, the strap 10 is exactly on the ground, allowing the storage rack 13 in the second drying chamber 22 to move out.

[0053] Combine Figure 6 In addition, the tobacco rack 13 in this embodiment includes a frame 131 and a storage plate 132. The bottom plate of the frame 131 is connected to a plurality of rollers 17, allowing the entire rack 13 to roll on the ground. The storage plates 132 are arranged horizontally and are used to store tobacco. The storage plates 132 are spaced apart along the height of the frame 131.

[0054] The storage plate 132 includes a first support plate 14 and a second support plate 15 arranged on the left and right. The first support plate 14 includes a first plate 141 and a second plate 142. The first plate 141 is fixedly connected to the frame body 131, and the second plate 142 is rotatably connected to the first plate 141 on the side close to the second support plate 15. The second plate 142 is flipped by a gas spring control, and the piston rod of the gas spring is connected to the second plate 142 through a hinged frame.

[0055] The second support plate 15 is raised and lowered on the frame 131 by a cylinder 18. The second support plate 15 includes a third plate 151 and a fourth plate 152. The third plate 151 is connected to the piston rod of the cylinder 18, and the cylinder 18 is located below the third plate 151. The fourth plate 152 is rotatably connected to the third plate 151 on the side closest to the first support plate 14. The rotation axes of the fourth plate 152 and the second plate 142 are parallel. Both the second plate 142 and the fourth plate 152 are used to hold tobacco, and both are equipped with baffles 16 on their sides. The baffles 16 form a limiting groove to prevent tobacco from falling from the second plate 142 or the fourth plate 152.

[0056] In the traditional tobacco drying process, the position of the tobacco is generally fixed, which has a poor drying effect. By setting the storage plate 132 as the first support plate 14 and the second support plate 15, the tobacco can be placed on the second plate 142 and the fourth plate 152.

[0057] In the initial state, the second plate 142 and the fourth plate 152 are both horizontally arranged, and the tobacco is placed stably on the second plate 142 and the fourth plate 152, and the second plate 142 and the fourth plate 152 are on the same horizontal plane. When the state of the tobacco needs to be changed, the cylinder 18 is first used to control the entire second support plate 15 to move upward, so that the plane of the fourth plate 152 is higher than the plane of the second plate 142. Then, the gas spring is used to control the rotation of the fourth plate 152. Under the action of gravity and the inertia of the overturning, the tobacco on the fourth plate 152 will fall onto the second plate 142.

[0058] Next, the cylinder 18 is used again to control the entire second support plate 15 to move downward, so that the plane where the fourth plate 152 is located is lower than the plane where the second plate 142 is located. Then, the gas spring is used to control the rotation of the second plate 142, and the tobacco on the second plate 142 will fall onto the fourth plate 152 under the action of gravity and flipping inertia. The above operation is repeated in a cycle to achieve the change of the tobacco state, which can improve the drying effect of the tobacco. It should be noted that the second plate 142 and the fourth plate 152 are very close to each other, with almost no gap, so as to prevent the tobacco from falling during the flipping process.

[0059] A collection box is also placed at the bottom of the frame 131. The collection box has an opening for receiving tobacco on the storage plate 132. The collection box can receive tobacco that has been dried and cooled on the storage plate 132 and complete its collection. When unloading, the second plate is controlled to rotate so that the tobacco on the second plate 142 falls onto the fourth plate 152, and then the fourth plate 152 is controlled to rotate so that the tobacco on the fourth plate 152 falls into the collection box. During the flipping process of the second plate 142 and the fourth plate 152, a small amount of tobacco may fall, and the collection box can also serve as a receiving device, so that the tobacco in the collection box can still be dried.

[0060] The heat pump indoor tobacco dryer of the present embodiment is implemented as follows: a partition plate 3 divides a drying chamber body 2 into a first drying chamber 21 and a second drying chamber 22. When tobacco needs to be dried, the tobacco to be dried is first placed in the second drying chamber 22, and then the heat pump assembly 4 heats the second drying chamber 22. By directly installing the heat pump for drying inside the drying chamber body 2 and exchanging heat with the outside world through a window such as the first wire mesh 5, heat loss during transmission is reduced, thereby improving thermal efficiency.

[0061] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A heat pump type tobacco indoor drying machine, characterized in that: The heat pump assembly (4) comprises a base (1), a drying room body (2), a partition plate (3) and a heat pump component (4), wherein the base (1) is arranged at the bottom of the drying room body (2), the partition plate (3) is arranged in the drying room body (2) and divides the drying room body (2) into a first drying room (21) and a second drying room (22); the heat pump component (4) comprises an evaporator (41), a compressor (42) and a condenser (43), the evaporator (41) and the compressor (42) are connected and both are arranged in the first drying room (21), the condenser (43) is arranged at the top of the second drying room (22) and is connected to the compressor (42), and the second drying room (22) is used for drying tobacco; A first wire mesh (5) is provided on one side of the first drying room (21), the first wire mesh (5) is close to the evaporator (41), and the first drying room (21) is in communication with the outside air through the first wire mesh (5).

2. A heat pump type tobacco indoor dryer according to claim 1, characterized in that: The inner walls of the first drying room (21) and the second drying room (22) are both provided with a heat-insulating layer, and the heat-insulating layer is made of a heat-insulating material.

3. A heat pump type tobacco indoor dryer according to claim 2, characterized in that: The heat pump assembly (4) further comprises a fan (6), wherein a first mounting hole is provided through the side wall of the first drying room (21), and the fan (6) is arranged on the first mounting hole. The fan (6) is connected to the heat pump assembly (4) and is used to supply air for cooling the second drying room (22); It also includes a second wire mesh (7), a second mounting hole is provided through the side wall of the second drying room (22), and the second wire mesh (7) is arranged at the second mounting hole.

4. A heat pump type indoor tobacco drying machine according to claim 1, characterized in that: The invention also includes a material door (9) and a strap (10), wherein the material door (9) is arranged on the second drying room (22) in a lifting manner and is used for allowing the storage rack (13) containing tobacco to enter and exit the second drying room (22); the strap (10) is rotatably connected to the second drying room (22) and is located at the lower end of the material door (9), and the strap (10) is arranged to be inclined in a direction away from the second drying room (22) and is used for allowing the storage rack (13) to move from the ground to the second drying room (22).

5. A heat pump type indoor tobacco drying machine according to claim 4, characterized in that: It also includes an observation window (11), which is provided on the material door (9) and is made of a transparent material.

6. A heat pump type indoor tobacco drying machine according to claim 4, characterized in that: It also includes a linkage assembly (12), wherein the linkage assembly (12) is connected to the material door (9) and the strap (10) at the same time, and when the material door (9) is in a closed state, the strap (10) is attached to the material door (9); The linkage assembly (12) includes a pull rope (121), a fixed pulley (122), a winding wheel (123), a connecting shaft (124), a driving motor (125), a first bevel gear (126) and a second bevel gear (127); the fixed pulley (122) is rotatably connected to the top of the second drying room (22); the winding wheel (123) is rotatably connected to the second drying room (22) and is close to the base (1); the pull rope (121) passes around the fixed pulley (122); one end of the pull rope (121) is connected to the upper end of the feed door, and the other end is wound around the winding wheel (123); The connecting shaft (124) is coaxially arranged with the winding wheel (123); the driving motor (125) is connected to the connecting shaft (124) and is used to control the rotation of the winding wheel (123); the driving motor (125) has a self-locking function; The first bevel gear (126) is coaxially arranged on the connecting shaft (124), and the second bevel gear (127) is arranged on the rotating shaft of the strap (10) and meshes with the first bevel gear (126); when the driving motor (125) drives the winding wheel (123) to rotate, the pull rope (121) is wound around the winding wheel (123), so that the material door (9) moves vertically upward; the first bevel gear (126) drives the second bevel gear (127) to rotate, so that the strap (10) rotates in a direction close to the ground.

7. A heat pump type indoor tobacco drying machine according to claim 4, characterized in that: The utility model further comprises a storage rack (13), wherein the storage rack (13) comprises a frame body (131) and a storage plate (132), wherein the bottom of the frame body (131) is connected to a plurality of rollers (17), and the storage plate (132) is arranged horizontally and is used for placing tobacco, and the storage plates (132) are spaced apart along the height direction of the frame body (131).

8. The heat pump type indoor tobacco drying machine according to claim 7, characterized in that: The storage plate (132) includes a first support plate (14) and a second support plate (15), the first support plate (14) includes a first plate (141) and a second plate (142), the first plate (141) is fixedly connected to the frame (131), and the second plate (142) is rotatably connected to the first plate (141) on a side close to the second support plate (15), and the second plate (142) is rotated by a gas spring; The second support plate (15) is raised and lowered on the frame (131) by a cylinder (18). The second support plate (15) includes a third plate (151) and a fourth plate (152). The third plate (151) is connected to the piston rod of the cylinder (18). The fourth plate (152) is rotatably connected to the third plate (151) on a side close to the first support plate (14). The rotation axes of the fourth plate (152) and the second plate (142) are parallel. The second plate (142) and the fourth plate (152) are both used to place tobacco, and baffles (16) are provided on the circumference of both plates.

9. The heat pump type indoor tobacco drying machine according to claim 8, characterized in that: It also includes a collection box, which is provided with an opening and is located at the bottom of the frame (131). The collection box is used to receive tobacco on the storage plate (132).

10. The heat pump type indoor tobacco drying machine according to claim 1, characterized in that: It also includes an electric heating tube (8), a plurality of which are arranged in parallel and located in the second drying room (22), each of which is close to the condenser (43) and is used to assist in drying the tobacco.

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