Dual-temperature heat pump system for tobacco curing

Abstract

This invention relates to the field of heat pump system technology and discloses a dual-temperature heat pump system for tobacco curing. Its structure includes a tobacco curing chamber, an intelligent control module, a dual-temperature heat pump device, a heat recovery device, and a flow guiding device. By adding a dual-temperature heat pump device to the tobacco curing process and incorporating two sets of condensers capable of providing different temperatures, the invention can meet the different temperature requirements at different stages of tobacco curing, improving the curing effect and efficiency. Furthermore, the flow-throttling device includes an electronic expansion valve and a capillary tube, connected to the first and second condensers respectively. Based on the current curing stage of the tobacco and temperature and humidity detection signals, the opening degree of the electronic expansion valve and capillary tube can be adjusted, thereby achieving precise control of the refrigerant flow and regulating the output heat, ensuring stable temperature and humidity, and improving the tobacco curing effect.

Description

Technical Field

[0001] This invention belongs to the field of heat pump systems, specifically relating to a dual-temperature heat pump system for tobacco curing. Background Technology

[0002] Tobacco is a perennial herbaceous plant that can be processed and utilized. Its core part is its leaves, which are the basic raw material for the tobacco industry. Fresh tobacco leaves need to be cured and processed after harvesting in order to complete the transformation from agricultural product to industrial raw material.

[0003] The quality of tobacco curing directly affects the appearance quality of tobacco leaves. In the tobacco processing process, precise control of temperature and humidity is the core factor that determines the curing quality. Tobacco curing needs to go through key stages such as the yellowing period and the drying period. At different stages, the tobacco's requirements for temperature and humidity are also different.

[0004] Traditional tobacco processing can only provide heat to tobacco within a single temperature range, and cannot adapt to the temperature and humidity requirements of tobacco at different roasting stages, resulting in poor tobacco roasting efficiency.

[0005] This application proposes a dual-temperature heat pump system for tobacco curing, which improves upon the aforementioned deficiencies. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a dual-temperature heat pump system for tobacco roasting that can provide different temperatures during the tobacco roasting process.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A dual-temperature heat pump system for tobacco curing includes a tobacco curing chamber, a placement rack, an intelligent control module, a dual-temperature heat pump device, and a heat recovery device. The placement rack is installed inside the tobacco curing chamber, and the intelligent control module is installed on the outer wall of the tobacco curing chamber. The dual-temperature heat pump device and the heat recovery device are connected to the outside of the tobacco curing chamber. The intelligent control module is electrically connected to the tobacco curing chamber, the dual-temperature heat pump device, and the heat recovery device.

[0009] In one specific implementation scheme, the dual-temperature heat pump device includes a compressor, a four-way reversing valve, a first condenser, a second condenser, a throttling device, an evaporator, heat exchange pipelines, and a first pipeline. The four-way reversing valve is installed on the bottom exhaust port of the compressor. The left and right connection ports of the four-way reversing valve are respectively connected to the inlets of the first condenser and the second condenser. The outlets of the first condenser and the second condenser are connected to the throttling device. The bottom outlet of the throttling device is connected to the inlet of the evaporator. The outlet of the evaporator is connected to the last connection port of the four-way reversing valve. The back of the four-way reversing valve is connected to the suction port of the compressor through the first pipeline, thereby forming a complete heat pump circulation loop.

[0010] Both the first and second condensers are equipped with heat exchange pipes, which are connected to the tobacco roasting chamber. The heat released by the refrigerant inside the first and second condensers is transferred to the airflow in the heat exchange pipes and then delivered into the roasting chamber.

[0011] In one specific implementation, the four-way reversing valve is connected to a first condenser and a second condenser.

[0012] In one specific implementation, the first condenser is used to provide low-temperature heat in the range of 38-42°C, thereby adapting to the baking temperature requirements during the yellowing period of tobacco.

[0013] The second condenser is used to provide heat in the high-temperature range of 60-68°C, so as to meet the baking temperature requirements of tobacco drying stage. The switching between the low-temperature and high-temperature ranges is achieved by switching the valve core of the four-way reversing valve.

[0014] In one specific implementation, the throttling device includes an electronic expansion valve and a capillary tube. The connection port of the electronic expansion valve is connected to a first condenser, and the connection port of the capillary tube is connected to a second condenser. Both the electronic expansion valve and the capillary tube can be controlled by an intelligent control module.

[0015] In one specific implementation scheme, the heat recovery device includes a plate heat exchanger, a dehumidification inlet pipe, a dehumidification outlet pipe, an air inlet pipe, and an air outlet pipe. The plate heat exchanger is located on one side of the dual-temperature heat pump device, and the dehumidification inlet pipe, the dehumidification outlet pipe, the air inlet pipe, and the air outlet pipe are respectively connected to the plate heat exchanger.

[0016] In one specific implementation scheme, the other end of the dehumidification inlet pipe is connected to the tobacco curing chamber, and the other end of the dehumidification outlet pipe is connected to an external exhaust gas treatment device.

[0017] The other end of the air inlet pipe is connected to the outside air, allowing room temperature air to enter. The other end of the air outlet pipe is connected to the air inlet pipe of the compressor on the dual-temperature heat pump device.

[0018] In one specific implementation scheme, the tobacco curing chamber includes a circulating fan, a flow guiding device, and a dehumidification pipe. The circulating fan is installed on the top of the tobacco curing chamber, and the flow guiding device is installed on both sides of the inner side wall of the tobacco curing chamber. The dehumidification pipe is connected to the tobacco curing chamber and is connected to the dehumidification inlet pipe.

[0019] In one specific implementation, the circulating fan is electrically connected to an intelligent control module, which can adjust the speed of the circulating fan according to different stages of tobacco roasting.

[0020] In one specific implementation scheme, a humidity regulating valve is installed inside the dehumidification pipeline and is electrically connected to an intelligent control module, which can adjust the opening degree of the humidity regulating valve according to the humidity detection value inside the tobacco roasting chamber.

[0021] In one specific implementation, the tobacco roasting chamber is also equipped with a temperature sensor and a humidity sensor, both of which are electrically connected to the intelligent control module.

[0022] In one specific implementation scheme, the flow guiding device includes a mounting frame, a motor, a first swing rod, a triangular plate, a connecting rod, a right-angle plate, a second swing rod, a bearing seat, a reciprocating plate, and flow guiding plates. One side of the mounting frame is connected to the inner wall of the tobacco curing chamber. A motor is mounted on the mounting frame, and the output end of the motor is connected to the first swing rod. A triangular plate is rotatably fitted on the first swing rod. One end of the triangular plate is rotatably fitted with a connecting rod, and the other end of the connecting rod is rotatably fitted with a right-angle plate. A second swing rod is connected to both the right-angle plate and the triangular plate. The two second swing rods are mounted on the mounting frame through bearing seats. A reciprocating plate is also mounted on both the right-angle plate and the triangular plate, and several flow guiding plates are arrayed on the reciprocating plate.

[0023] In one specific implementation scheme, a universal ball is installed at the bottom of the guide plate, the universal ball is built into the reciprocating plate and rotates in cooperation with it, and springs are installed on both sides of the guide plate, the other ends of the two springs are connected to the reciprocating plate.

[0024] According to the above-mentioned technical solution, the present invention provides a dual-temperature heat pump system for tobacco curing, which has the following beneficial effects:

[0025] (1) By adding a dual-temperature heat pump device to the tobacco roasting process, and by providing two sets of condensers that can provide different temperatures, the present invention can provide different temperature requirements for different roasting stages during tobacco roasting, thereby improving the roasting effect and efficiency of tobacco roasting.

[0026] (2) By providing an electronic expansion valve and a capillary tube on the throttling device and connecting them to the first condenser and the second condenser respectively, the present invention can adjust the opening degree of the electronic expansion valve and the capillary tube according to the current tobacco roasting stage and temperature and humidity detection signals, thereby achieving precise control of refrigerant flow and regulating output heat, thus ensuring stable temperature and humidity and improving the tobacco roasting effect.

[0027] (3) By adding a heat recovery device, the present invention can recover the waste heat in the exhaust airflow and deliver the heated air after recovering the waste heat to the compressor, thereby improving the heating efficiency of the heat pump and reducing energy consumption, thus achieving the effect of green environmental protection.

[0028] (4) The present invention adds a flow guiding device in the tobacco roasting chamber. The back and forth swing of the reciprocating plate will drive the flow guiding plate to swing back and forth under the action of the universal ball, so as to guide and disperse the hot airflow inside the tobacco roasting chamber, so that the tobacco can be roasted evenly and avoid local overheating.

[0029] (5) By adding springs on both sides of the guide plate, the present invention can reset the guide plate after being squeezed by the guide plate when the guide plate swings, thereby forming a reciprocating motion, which can increase the swing amplitude and frequency of the guide plate and improve the dispersion effect of the guide plate on the internal airflow. Attached Figure Description

[0030] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of a dual-temperature heat pump system for tobacco curing according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the dual-temperature heat pump device in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the throttling device in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the heat recovery device in the embodiments of this application;

[0035] Figure 5 This is a schematic diagram of the structure of the tobacco drying chamber in an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the flow guiding device in the embodiments of this application;

[0037] Figure 7 This is a cross-sectional schematic diagram of the flow guiding device in the embodiments of this application;

[0038] Figure 8 Examples of this application Figure 7 Enlarged diagram of point A in the middle.

[0039] In the diagram: Tobacco roasting chamber-1, Placement rack-2, Intelligent control module-3, Dual-temperature heat pump device-4, Heat recovery device-5, Compressor-41, Four-way reversing valve-42, First condenser-43, Second condenser-44, Throttling device-45, Evaporator-46, Heat exchange pipeline-47, First pipeline-48, Electronic expansion valve-451, Capillary tube-452, Plate heat exchanger-51, Exhaust inlet pipe-52, Exhaust outlet pipe-53, Air inlet pipe-54, Air outlet pipe-55, Circulating fan-11, Flow guide device-12, Exhaust pipeline-13, Mounting bracket-21, Motor-22, First swing rod-23, Triangular plate-24, Connecting rod-25, Right angle plate-26, Second swing rod-27, Bearing seat-28, Reciprocating plate-29, Flow guide plate-30, Universal ball-shaped ... Detailed Implementation

[0040] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0041] Example 1: Please refer to Figures 1-4 The specific embodiments of the present invention are as follows:

[0042] A dual-temperature heat pump system for tobacco curing includes a tobacco curing chamber 1, a placement rack 2, an intelligent control module 3, a dual-temperature heat pump device 4, and a heat recovery device 5. The placement rack 2 is installed inside the tobacco curing chamber 1, through which tobacco to be cured can be placed. The intelligent control module 3 is installed on the outer wall of the tobacco curing chamber 1. The dual-temperature heat pump device 4 and the heat recovery device 5 are connected to the outside of the tobacco curing chamber 1. The intelligent control module 3 is electrically connected to the tobacco curing chamber 1, the dual-temperature heat pump device 4, and the heat recovery device 5, which can realize the coordinated work of each module and the precise control of temperature and humidity.

[0043] Please see Figure 1The dual-temperature heat pump device 4 can provide the heat required for different baking stages in the tobacco baking chamber 1. The heat recovery device 5 is connected in series between the air inlet pipe of the tobacco baking chamber 1 and the dual-temperature heat pump device 4. It can be used to recover the waste heat in the exhaust airflow of the tobacco baking chamber 1, improve the heating efficiency of the dual-temperature heat pump device 4, and reduce the energy consumption of the system.

[0044] Please see Figures 1-2 The dual-temperature heat pump device 4 includes a compressor 41, a four-way reversing valve 42, a first condenser 43, a second condenser 44, a throttling device 45, an evaporator 46, a heat exchange pipeline 47, and a first pipeline 48. The four-way reversing valve 42 is installed on the bottom exhaust port of the compressor 41. The left and right connection ports of the four-way reversing valve 42 are respectively connected to the inlets of the first condenser 43 and the second condenser 44. The outlets of the first condenser 43 and the second condenser 44 are connected to the throttling device 45. The bottom outlet of the throttling device 45 is connected to the inlet of the evaporator 46. The outlet of the evaporator 46 is connected to the last connection port of the four-way reversing valve 42. The back of the four-way reversing valve 42 is connected to the suction port of the compressor 41 through the first pipeline 48, thereby forming a complete heat pump circulation loop.

[0045] Both the first condenser 43 and the second condenser 44 are equipped with heat exchange pipes 47. Both heat exchange pipes 47 are connected to the tobacco roasting chamber 1 and can transfer the heat released by the refrigerant inside the first condenser 43 and the second condenser 44 to the airflow in the heat exchange pipes 47, and then deliver it into the roasting chamber.

[0046] Please see Figure 2 The four-way reversing valve 42 is connected to the first condenser 43 and the second condenser 44. By switching the conduction path of the internal valve core, it can achieve dual-temperature switching, thereby coping with the different temperature environments required during tobacco roasting.

[0047] Please see Figure 2 The first condenser 43 is used to provide low-temperature heat in the range of 38-42°C, so as to meet the baking temperature requirements during the yellowing period of tobacco.

[0048] The second condenser 44 is used to provide heat in the high-temperature range of 60-68℃, so as to meet the baking temperature requirements of tobacco drying period. The switching between the low-temperature range and the high-temperature range is achieved by switching the valve core of the four-way reversing valve 42.

[0049] The refrigerant flows through the refrigerant channels of the first condenser 43 and the second condenser 44, releasing heat. The released heat is transferred to the heat exchange surface of the condenser, and the heat exchange surface exchanges heat with the air in the heat exchange pipe 47, thereby heating the air into hot air. The heated hot air is then delivered into the tobacco roasting chamber 1 through the heat exchange pipe 47, while the refrigerant, after releasing heat, continues to flow through the refrigerant outlet to the throttling device 45, completing the internal circulation of the heat pump.

[0050] Please see Figures 1-3 The throttling device 45 includes an electronic expansion valve 451 and a capillary tube 452. The connection port of the electronic expansion valve 451 is connected to the first condenser 43, and the connection port of the capillary tube 452 is connected to the second condenser 44. Both the electronic expansion valve 451 and the capillary tube 452 can be controlled by the intelligent control module 3. The intelligent control module 3 adjusts the opening degree of the electronic expansion valve 451 and the capillary tube 452 according to the current tobacco roasting stage and temperature and humidity detection signals, thereby achieving precise control of refrigerant flow and regulating the output heat, thus ensuring stable temperature and humidity and improving the tobacco roasting effect.

[0051] Please see Figure 4 The heat recovery device 5 includes a plate heat exchanger 51, a dehumidification inlet pipe 52, a dehumidification outlet pipe 53, an air inlet pipe 54, and an air outlet pipe 55. The plate heat exchanger 51 is located on one side of the dual-temperature heat pump device 4. The plate heat exchanger 51 is connected to the dehumidification inlet pipe 52, the dehumidification outlet pipe 53, the air inlet pipe 54, and the air outlet pipe 55, respectively.

[0052] Please see Figure 4 The other end of the exhaust inlet pipe 52 is connected to the tobacco roasting chamber 1, and the other end of the exhaust outlet pipe 53 is connected to the external exhaust gas treatment device, which can discharge the cooled airflow after heat exchange.

[0053] The other end of the air inlet pipe 54 is connected to the outside air, which can introduce room temperature air. The other end of the air outlet pipe 55 is connected to the air inlet pipe of the compressor 41 on the dual-temperature heat pump device 4, which can deliver the hot air that has been heated after recovering waste heat to the compressor 41, thereby improving the heating efficiency of the heat pump.

[0054] By introducing the high-temperature and high-humidity exhaust airflow in the tobacco roasting chamber 1 into the plate heat exchanger 51, the exhaust airflow carries its own residual heat to the plate for heat exchange as it flows through the metal plates. After the heat exchange is completed, the low-temperature and low-humidity exhaust airflow will be discharged through the exhaust outlet pipe.

[0055] Outside air at room temperature enters the plate heat exchanger 51 through the air inlet duct 54, and absorbs the residual heat transferred by the heated metal plates as it flows through them, thereby raising the temperature of the air. The heated air then enters the dual-temperature heat pump device 4 through the air outlet duct 55.

[0056] Example 2: Please refer to Figures 5-8 The specific embodiments of the present invention are as follows:

[0057] Please see Figure 5 The tobacco drying chamber 1 includes a circulating fan 11, a flow guiding device 12, and a dehumidification pipe 13. The circulating fan 11 is installed on the top of the tobacco drying chamber 1. The flow guiding device 12 is installed on both sides of the inner side wall of the tobacco drying chamber 1. The dehumidification pipe 13 is connected to the tobacco drying chamber 1 and is connected to the dehumidification inlet pipe 52.

[0058] Please see Figure 5 The circulating fan 11 is electrically connected to the intelligent control module 3, which can adjust the speed of the circulating fan 11 according to different stages of tobacco curing. During the yellowing stage of tobacco, the speed is lower to reduce airflow disturbance and prevent the tobacco leaves from losing water too quickly. During the dry core stage of tobacco, the speed can be increased to accelerate the evaporation of moisture and improve the curing efficiency.

[0059] Please see Figures 1-5 The humidity control valve is installed inside the dehumidification pipe 13 and is electrically connected to the intelligent control module 3. It can adjust the opening of the humidity control valve according to the humidity detection value inside the tobacco curing chamber 1, thereby achieving precise control of the dehumidification amount and avoiding excessively high or low humidity from affecting the tobacco curing effect.

[0060] Please see Figure 5 The tobacco roasting chamber 1 is also equipped with temperature and humidity sensors, which are electrically connected to the intelligent control module 3. These sensors can detect the temperature and humidity data inside the roasting chamber in real time and transmit the detected data signals to the intelligent control module 3.

[0061] Please see Figures 6-7 The flow guiding device 12 includes a mounting frame 21, a motor 22, a first swing rod 23, a triangular plate 24, a connecting rod 25, a right-angle plate 26, a second swing rod 27, a bearing seat 28, a reciprocating plate 29, and a flow guiding plate 30. One side of the mounting frame 21 is connected to the inner wall of the tobacco roasting chamber 1. The motor 22 is mounted on the mounting frame 21. The output end of the motor 22 is connected to the first swing rod 23. The triangular plate 24 is rotatably fitted on the first swing rod 23. One end of the triangular plate 24 is rotatably fitted with a connecting rod 25. The other end of the connecting rod 25 is rotatably fitted with a right-angle plate 26. The right-angle plate 26 and the triangular plate 24 are both connected to the second swing rod 27. The two second swing rods 27 are mounted on the mounting frame 21 through the bearing seat 28. The right-angle plate 26 and the triangular plate 24 are also both mounted with reciprocating plates 29. Several flow guiding plates 30 are arrayed on the reciprocating plates 29.

[0062] Please see Figures 6-7The motor 22 drives the first swing rod 23 to rotate. When the first swing rod 23 rotates, it drives the triangle plate 24 connected to it to swing synchronously. The triangle plate 24 and the right-angle plate 26 are connected by the connecting rod 25. Therefore, the right-angle plate 26 will swing synchronously with the swing of the triangle plate 24, forming a synergistic effect, which can drive the reciprocating plate 29 connected to each other to swing back and forth.

[0063] Please see Figures 7-8 A universal ball 301 is installed at the bottom of the deflector plate 30. The universal ball 301 is built into the reciprocating plate 29 and rotates in cooperation with it. Springs 302 are installed on both sides of the deflector plate 30. The other end of the two springs 302 is connected to the reciprocating plate 29. By swinging back and forth, the deflector plate 30 will be driven to swing back and forth under the rotation of the universal ball 301, so as to guide and disperse the hot airflow inside the tobacco roasting chamber 1, so that the tobacco can be roasted evenly and avoid local overheating.

[0064] Please see Figure 8 The spring 302 can be reset after being squeezed by the guide plate 30 when the guide plate 30 swings, thereby forming a reciprocating motion, which can increase the swing amplitude and frequency of the guide plate 30 and improve the dispersion effect of the guide plate 30 on the internal airflow.

[0065] Based on the above embodiments, the specific working principle is as follows:

[0066] The tobacco leaves to be roasted are evenly placed on the rack 2 inside the tobacco roasting chamber 1. Then the door of the roasting chamber is closed. The temperature and humidity parameters and roasting time required for the tobacco during the yellowing and drying stages are set through the intelligent control module 3. Then the dual-temperature heat pump device 4 and heat recovery device 5 are started.

[0067] When the tobacco is in the yellowing stage, the four-way reversing valve 42 is controlled to switch to the operation of the first condenser 43, the compressor 41 runs, and the refrigerant generates low-temperature hot air of 38-42°C after heat exchange in the first condenser 43, and enters the tobacco baking chamber 1 through the heat exchange pipeline 47.

[0068] At this time, the synchronous drive circulating fan 11 runs, and the airflow is dispersed in conjunction with the operation of the flow guiding device 12, so that the low temperature hot air can flow evenly over the surface of the tobacco leaves and dry the tobacco evenly. At this time, the temperature sensor and humidity sensor inside the tobacco drying chamber 1 will detect the temperature and humidity inside the chamber in real time.

[0069] If the internal temperature is higher than 42℃, the intelligent control module 3 will adjust the opening of the electronic expansion valve 451 to increase the refrigerant flow and reduce the output heat; if the internal temperature is lower than 38℃, the intelligent control module 3 will control the opening of the electronic expansion valve 451 to decrease the refrigerant flow and increase the output heat.

[0070] After the tobacco has completed the yellowing stage of the roasting process, the intelligent control module 3 will control the four-way reversing valve 42 to switch to the second condenser 44 to work, the compressor 41 will continue to run, and the refrigerant will generate high-temperature hot air of 60-68°C after heat exchange in the second condenser 44, which will then enter the tobacco roasting chamber 1.

[0071] At this time, the intelligent control module 3 will regulate the flow rate of the capillary tube 452 to achieve precise control of the refrigerant flow, thereby maintaining the temperature inside the tobacco chamber at 60-68℃.

[0072] At this time, the humidity sensor detects the humidity in real time. If the humidity is too high, the opening of the humidity regulating valve on the dehumidification pipe 13 is increased to enhance dehumidification.

[0073] If the humidity is low, the opening of the humidity regulating valve is reduced to decrease the amount of moisture released until the tobacco leaves are completely dry and the curing process is complete.

[0074] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0075] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A dual-temperature heat pump system for tobacco curing, comprising a tobacco curing chamber (1), a rack (2) disposed inside the tobacco curing chamber (1), an intelligent control module (3) mounted on the outer wall of the tobacco curing chamber (1), a dual-temperature heat pump device (4) and a heat recovery device (5) located outside the tobacco curing chamber (1), wherein the intelligent control module (3) is electrically connected to the tobacco curing chamber (1), the dual-temperature heat pump device (4) and the heat recovery device (5); characterized in that: The dual-temperature heat pump device (4) includes a compressor (41), a four-way reversing valve (42) installed on the bottom exhaust port of the compressor (41), a first condenser (43) and a second condenser (44) located on the left and right connection ports of the four-way reversing valve (42). The outlets of the first condenser (43) and the second condenser (44) are both connected to a throttling device (45). The bottom outlet of the throttling device (45) is connected to the inlet of the evaporator (46). The outlet of the evaporator (46) is connected to the last connection port of the four-way reversing valve (42). The back of the four-way reversing valve (42) is connected to the suction port of the compressor (41) through a first pipe (48). The throttling device (45) includes an electronic expansion valve (451) and a capillary tube (452). The connection port of the electronic expansion valve (451) is connected to the first condenser (43), and the connection port of the capillary tube (452) is connected to the second condenser (44). Both the electronic expansion valve (451) and the capillary tube (452) can be controlled by the intelligent control module (3). The tobacco curing chamber (1) includes a circulating fan (11), a flow guiding device (12) located on the two side walls inside the tobacco curing chamber (1), and a dehumidification pipe (13) installed on the tobacco curing chamber (1). The dehumidification pipe (13) is connected to the dehumidification inlet pipe (52). The flow guiding device (12) includes a mounting frame (21), a motor (22) mounted on the mounting frame (21), a first swing rod (23) located at the output end of the motor (22), a triangular plate (24) for rotating with the first swing rod (23), a connecting rod (25) located at one end of the triangular plate (24), a right angle plate (26) located at the other end of the connecting rod (25), and a second swing rod (27) mounted on the right angle plate (26) and the triangular plate (24). The two second swing rods (27) are mounted on the mounting frame (21) through bearing seats (28). A reciprocating plate (29) is also mounted on both the right angle plate (26) and the triangular plate (24). A plurality of flow guiding plates (30) are arrayed on the reciprocating plate (29).

2. The dual-temperature heat pump system for tobacco curing according to claim 1, characterized in that: The first condenser (43) and the second condenser (44) are both equipped with heat exchange pipes (47), and both heat exchange pipes (47) are connected to the tobacco roasting chamber (1).

3. The dual-temperature heat pump system for tobacco curing according to claim 1, characterized in that: The first condenser (43) is used to provide heat in the low-temperature range of 38-42°C.

4. The dual-temperature heat pump system for tobacco curing according to claim 1, characterized in that: The second condenser (44) is used to provide heat in the high-temperature range of 60-68°C.

5. A dual-temperature heat pump system for tobacco curing according to claim 1, characterized in that: The heat recovery device (5) includes a plate heat exchanger (51) and a humidification inlet pipe (52), a humidification outlet pipe (53), an air inlet pipe (54), and an air outlet pipe (55) installed on the plate heat exchanger (51).

6. A dual-temperature heat pump system for tobacco curing according to claim 1, characterized in that: The humidity control valve is installed inside the dehumidification pipe (13) and is electrically connected to the intelligent control module (3).

7. A dual-temperature heat pump system for tobacco curing according to claim 1, characterized in that: The tobacco roasting chamber (1) is also equipped with a temperature sensor and a humidity sensor, both of which are electrically connected to the intelligent control module (3).

8. A dual-temperature heat pump system for tobacco curing according to claim 1, characterized in that: The bottom of the guide plate (30) is equipped with a universal ball (301), which is built into the reciprocating plate (29) and rotates in cooperation. Springs (302) are installed on both sides of the guide plate (30), and the other ends of the two springs (302) are connected to the reciprocating plate (29).

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