Dual-energy baking equipment for tobacco leaves, fruits and vegetables

Abstract

The invention belongs to the technical field of baking, and discloses dual-energy baking equipment for tobacco leaves, fruits and vegetables, which is mainly used for solving the problems of low baking efficiency and large application limitation of multi-energy baking equipment in the prior art. A heat pump and fuel gas shared dual-energy heating mode is adopted, stability and high efficiency of the baking system are guaranteed, heat supplied by the heat pump unit serves as a main heat source, the combustion unit serves as an auxiliary heat source, the combustion unit can achieve the effect of rapid temperature rise and is not affected by the environment, the defect of independent heat supply of the heat pump unit can be perfectly overcome, and the service life of the baking system is prolonged. The baking requirements on agricultural products such as tobacco leaves, fruits and vegetables can be met, and the practicability is higher; meanwhile, due to the design of the double heating systems, the installed power of a traditional heat pump system and the requirement for a circuit can be greatly reduced, the application range is wider, the operation cost is lower, and meanwhile when one unit breaks down or has an accident, the other unit can still continue to work so as to guarantee continuous baking work.

Description

Technical Field

[0001] The invention belongs to the technical field of baking, and in particular relates to dual-energy tobacco leaf, fruit and vegetable baking equipment. Background Art

[0002] Since green development has become the mainstream concept of society, in the field of drying agricultural products such as tobacco leaves, fruits and vegetables, since agricultural products contain a lot of water, they are not convenient to store, transport and sell for a long time, and have a certain seasonality. If they are dried, they can prevent mildew and death, maintain their use value, and extend their shelf life. Therefore, drying processing is of great significance to agricultural products. It can not only improve their value and quality, but also facilitate storage and promote sales.

[0003] The current technology for tobacco is a three-stage five-step baking process, with a maximum baking temperature of 68°C and a baking time of generally 8-9 days. The early stage is heat preservation and moisture retention, and the later stage is temperature increase and moisture removal. The drying of fruits and vegetables is due to the fact that there are some types of fruits and vegetables with high heat sensitivity, high water content, thick skin, easy discoloration, and high sugar content. In addition, the requirements for the fruit shape after baking are high. For the heat source system, the heating system needs to have extremely strong equipment stability, rapid heating ability, precise temperature control ability, strong temperature stability ability, and energy-saving and environmental protection ability.

[0004] Most traditional baking equipment is single-energy baking equipment, and mainly uses coal and other polluting fuels for baking. This method pollutes the environment and is not conducive to environmental protection. At the same time, the efficiency of the drying equipment is still very low. At the same time, when encountering extreme conditions, there will be insufficient energy supply and cannot meet the needs of baking, so it needs to be improved again. Based on this, a more environmentally friendly and cost-effective new energy baking technology has emerged on the market. Among them, the more mainstream technical means is air source heat pump technology. For example, in the utility model patents with patent numbers "CN217929890U" and "CN215864406U", air source heat pumps are used for drying. The heat pump heating system mainly uses the reverse Carnot principle to absorb heat from the surrounding environment and transfer it to the heated object. It has high thermal efficiency, energy saving and environmental protection, strong stability, precise temperature and humidity control, and low cost. However, heat pump heating has high requirements for ambient temperature. If the ambient temperature is too low, the temperature is difficult to rise. If the ambient temperature is too high, the temperature rises slowly, and the dependence on auxiliary heat is too strong.

[0005] Based on the problems caused by the single heating of the above heat pump system, hybrid baking equipment using dual energy sources for heating has also appeared on the market, such as a solar energy-air source dual-position joint heat circulation sunlight drying room disclosed in the application number "CN202210539499.8". However, in actual use, it is found that the mixed heating method of solar energy and air energy still has great limitations. On the one hand, it is because solar energy technology is not mature enough and its energy utilization rate is low. On the other hand, solar energy also has certain environmental limitations. Therefore, the dual energy baking equipment does not play a significant role in improving the overall baking efficiency. Instead, it increases the equipment cost, which is not worth the loss. In addition, the baking equipment cannot achieve timely response and rapid adjustment of temperature during the drying process of tobacco leaves, fruits and vegetables, which will also lead to low final drying quality of the product.

[0006] Therefore, it is urgent to design a dual-energy baking equipment with high baking efficiency, not affected by environmental factors and able to adapt to the baking requirements of tobacco leaves, fruits and vegetables and other products. Summary of the invention

[0007] The purpose of the present invention is to provide a dual-energy tobacco leaf, fruit and vegetable baking equipment, aiming to solve the problems of low baking efficiency and great application limitations of multi-energy baking equipment in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A dual-energy tobacco leaf fruit and vegetable baking equipment, comprising a baking room and a heat exchange chamber, characterized in that it also comprises a heat pump unit and a combustion unit, the heat pump unit comprises a heat pump body, the heat pump body is installed outside the heat exchange chamber, and the heat supply end of the heat pump body is connected to the heat exchange chamber; the combustion unit comprises a burner, a buffer furnace body and a heat exchange pipe, the burner is installed outside the heat exchange chamber, the buffer furnace body and the heat exchange pipe are both installed inside the heat exchange chamber, and the buffer furnace body is respectively connected to the burner and the heat exchange pipe; the baking room is connected to the top of the heat exchange chamber through an air inlet, and a variable frequency fan is installed on the upper part of the heat exchange chamber, and the position of the variable frequency fan is lower than the position of the air inlet; a tobacco leaf baking grill and a fruit and vegetable baking cart compatible with the tobacco leaf baking grill are provided in the baking room; a controller is also included, and the heat pump unit, the combustion unit and the variable frequency fan are all connected to the controller signal.

[0010] Furthermore, the baking room is connected to the bottom of the heat exchange chamber through an air outlet, and a return air outlet is provided at the lower part of the heat exchange chamber corresponding to the position of the air outlet.

[0011] Furthermore, a dehumidification port connecting the heat exchange chamber with the outside is provided at the lower part of the heat exchange chamber, and air supply ports are provided on both sides of the heat exchange chamber, and air supply fans are installed in the air supply ports, and the air supply fans are connected to the controller signals.

[0012] Furthermore, the tobacco baking grill is a three-layer equidistant structure of upper, middle and lower layers, the upper grill structure is slightly lower than the height of the air inlet, and the spacing between two adjacent grill structures and the lower grill structure and the bottom of the baking room is adapted to the length of the tobacco plants; a number of detachable cross bars are installed on each layer of the grill structure, and a number of comb-type cigarette clamps are arranged on the cross bars.

[0013] Furthermore, the fruit and vegetable baking cart includes a multi-layer carrying baking tray; the width of the fruit and vegetable baking cart is smaller than the width of the tobacco baking grill, and the height of the fruit and vegetable baking cart is between the heights of the middle and lower grill structures of the tobacco baking grill; when baking fruits and vegetables, the cross bar on the lower grill structure of the tobacco baking grill is removed, and an air duct partition is laid on the middle grill structure, and an air flow channel is left between the air duct partition and the side of the baking room opposite to the heat exchange chamber.

[0014] Furthermore, two tobacco baking racks are provided, and the two tobacco baking racks are arranged left and right along the width direction of the baking room; two fruit and vegetable baking carts are provided, and the two fruit and vegetable baking carts are respectively located in the middle of the two tobacco baking racks.

[0015] Furthermore, a baking room door is provided on a side of the baking room opposite to the heat exchange chamber, and a door observation window is provided on the baking room door.

[0016] Furthermore, a plurality of wall observation windows are arranged on the left and right sides of the baking room, and the plurality of wall observation windows are arranged in a stepped manner.

[0017] Furthermore, the blowing direction of the variable frequency fan is vertically upward, and arc-shaped air induction plates are arranged above the variable frequency fan and at the top corner of the baking room on the side opposite to the heat exchange chamber.

[0018] Furthermore, the buffer furnace body is fixedly installed at the bottom of the heat exchange chamber, the heat exchange tubes are installed above the buffer furnace body and are arranged in multiple rows and columns, and heat dissipation fins are evenly embedded on the outside of the heat exchange tubes.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adopts a dual-energy heating mode shared by a heat pump and gas to ensure the stability and efficiency of the baking system, wherein the heat supply of the heat pump unit serves as the main heat source, and plays a role in constant temperature and temperature control, and the combustion unit provides an auxiliary heat source for the equipment through the combustion heat of fuels such as liquefied natural gas and liquefied petroleum gas. It has a high calorific value and can play a role in rapid heating, and is green and pollution-free, and is not affected by environmental and equipment conditions. It can perfectly make up for the shortcomings of the heat pump unit when it is used for heating alone, and can also meet the baking requirements of agricultural products such as tobacco leaves, fruits and vegetables; at the same time, the heat pump unit and the combustion unit in the equipment do not interfere with each other, and can be separately controlled by a controller. Such a design can not only greatly reduce the installed power of the traditional heat pump system, reduce the requirements for the line, make it more widely used, and lower the operating cost, but also when a unit fails or an accident occurs, the other unit can still continue to work to ensure the continuity of the baking work.

[0021] 2. The present invention arranges air outlets at the bottom of the baking room and the heat exchange chamber, and arranges return air outlets at the lower part of the heat exchange chamber corresponding to the position of the air outlets. The air outlets are used to discharge the circulating hot air and humid air in the baking room space, and the circulating hot air can also be reheated by the heat pump unit through the return air outlet, and transported back to the heat exchange chamber and re-enter the baking room through the air inlet for circulation baking, thereby realizing the reuse of waste heat of the hot air and avoiding energy waste.

[0022] 3. The present invention also has a dehumidification port connecting the heat exchange chamber with the outside at the lower part of the heat exchange chamber, and air supply ports are respectively provided on both sides of the heat exchange chamber. Air supply fans are installed in the air supply ports. The air supply fans are mainly used to supply air to the heat exchange chamber and the baking room, so that the humid air in the baking room can quickly pass through the air outlet and be discharged through the dehumidification port to avoid affecting the baking quality; the air supply fan is connected to the controller signal, and the controller is used to control the power of the air supply fan to adjust the air supply degree.

[0023] 4. The present invention is provided with a tobacco baking grill and a fruit and vegetable baking cart in the baking room, which can bake tobacco leaves, fruits and vegetables and similar products separately, has stronger practicality and higher equipment utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a front cross-sectional view of the present invention when baking fruits and vegetables;

[0026] Figure 2 It is a schematic diagram of the overall side structure of the present invention;

[0027] Figure 3 It is a left side view of the present invention on section AA;

[0028] Figure 4 It is a right side view of the present invention;

[0029] Figure 5 It is a cross-sectional view of the present invention on the BB section when tobacco leaves are being baked;

[0030] Figure 6 It is a cross-sectional view of the present invention on the BB section when baking fruits and vegetables;

[0031] Figure 7 It is a cross-sectional view of the present invention on section C;

[0032] Among them, 1-baking room, 2-heat exchange chamber, 3-heat pump body, 4-burner, 5-buffer furnace body, 6-heat exchange tube, 7-air inlet, 8-frequency conversion fan, 9-tobacco baking grill, 10-fruit and vegetable baking cart, 11-air outlet, 12-return air outlet, 13-humidification outlet, 14-supplementary air outlet, 15-supplementary air fan, 16-cross bar, 17-air duct partition, 18 baking room door, 19-door observation window, 20-wall observation window, 21-draft induced draft plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figures 1 to 7A dual-energy tobacco leaf, fruit and vegetable baking equipment shown in the figure includes a baking room 1 and a heat exchange chamber 2, both of which are rectangular in shape, and the baking room 1 and the heat exchange chamber 2 are separated by a middle partition; it also includes a heat pump unit and a combustion unit, the heat pump unit includes a heat pump body 3, the heat pump body 3 is installed outside the heat exchange chamber 2, and the heating end of the heat pump body 3 is connected to the heat exchange chamber 2, the heat pump unit is an integrated air source heat pump, the air source heat pump absorbs heat from the outside air through the heat pump body 3, and compresses and heats the air through its internal compressor and other components, and then transports the hot air to the heat exchange chamber 2 through the heat transfer pipe. Since the integrated air source heat pump adopts existing equipment on the market, its specific internal structure will not be repeated here; the combustion unit includes a burner 4, a buffer furnace body 5 and a heat exchange pipe 6, and the burner 4 is installed in the heat exchange chamber 2 In addition, the buffer furnace body 5 and the heat exchange tube 6 are both installed in the heat exchange chamber 2, and the buffer furnace body 5 is connected to the burner 4 and the heat exchange tube 6 respectively, the buffer furnace body 5 is fixedly installed at the bottom of the heat exchange chamber 2, the heat exchange tube 6 is installed above the buffer furnace body 5, the heat exchange tube 6 and the buffer furnace body 5 are seamlessly welded, and the heat exchange tube 6 is arranged in multiple rows and columns. In this embodiment, it is a 6-6-6-6 four-column 24 horizontal row structure from top to bottom; and the outside of the heat exchange tube 6 is also evenly inlaid with heat dissipation fins, the heat dissipation fins are supported by metal aluminum, and the radius is 2 cm; wherein, the burner 4 mainly provides space for the combustion of liquefied natural gas, liquefied petroleum gas and other fuels, the buffer furnace body 5 is used to temporarily store the heat generated by the combustion of the fuel, and the heat exchange tube 6 is used to better dissipate the heat in the buffer furnace body 5, and the heat dissipation fins inlaid on the outside are to improve the heat dissipation efficiency;

[0036] The top of the baking room 1 and the heat exchange chamber 2 are connected through an air inlet 7, and a variable frequency fan 8 is installed on the upper part of the heat exchange chamber 2. The position of the variable frequency fan 8 is lower than the position of the air inlet 7. The blowing direction of the variable frequency fan 8 is vertically upward, and arc-shaped air induction plates 21 are arranged above the variable frequency fan 8 and at the top corner of the baking room 1 on the side opposite to the heat exchange chamber 2. In this embodiment, two variable frequency fans 8 are arranged. The variable frequency fans 8 are mainly used to increase the hot air circulation speed between the heat exchange chamber 2 and the baking room 1. The variable frequency fans 8 can be controlled by a controller to adjust the air volume, which is used to adapt to the baking air volume requirements of different products when baking at different stages, and can reduce power consumption and improve baking quality;

[0037] The baking room 1 is provided with a tobacco baking grill 9 and a fruit and vegetable baking cart 10 adapted to the tobacco baking grill 9, which can bake tobacco leaves, fruits and vegetables and similar products respectively, which is more practical and has a higher equipment utilization rate;

[0038] It also includes a controller, and the heat pump unit, the combustion unit, and the variable frequency fan 8 are all connected to the controller signal. The controller is used to uniformly control the operation of the heat pump unit, the combustion unit, and the variable frequency fan 8. It can collect temperature information in the heat exchange chamber 2 and the baking room 1 to perform conversion of the corresponding heating equipment, power adjustment, and air volume delivery of the variable frequency fan 8, etc., to achieve intelligence, improve baking efficiency, and improve product baking quality;

[0039] In this embodiment, the heating system is a dual energy system of heat pump and gas, the heat pump is the main heat source, and the gas is the auxiliary heat source. The controller is provided with an open and close signal. The temperature design logic is to start the heat pump unit when the actual temperature of the baking room 1 is 2°C lower than the set temperature, and to start the combustion unit while keeping the heat pump unit working when it is 5°C lower than the set temperature. When the actual temperature of the baking room 1 reaches the set temperature, the combustion unit stops working, and the heat pump unit stops working when the actual temperature of the baking room 1 is 1°C higher than the set temperature.

[0040] Example 2

[0041] This embodiment is a further technical solution of Embodiment 1. Figure 3 As shown, an air outlet 11 is also provided at the bottom of the baking room 1 and the heat exchange chamber 2, and a return air outlet 12 is provided at the lower part of the heat exchange chamber 2 corresponding to the position of the air outlet 11. The air outlet 11 is used to discharge the circulating hot air and humid air in the baking room 1 space, and the circulating hot air can also be reheated by the heat pump unit through the return air outlet 12, and transported back to the heat exchange chamber 2 and re-enter the baking room 1 through the air inlet 7 for circulation baking, so as to realize the reuse of waste heat of hot air and avoid energy waste.

[0042] Example 3

[0043] This embodiment is a further technical solution of Embodiment 2. Figures 1 to 3 As shown, a dehumidification port 13 connecting the heat exchange chamber 2 with the outside is also provided at the lower part of the heat exchange chamber 2, and air supply ports 14 are respectively provided on both sides of the heat exchange chamber 2. A supply air fan 15 is installed in the supply air port 14. The supply air fan 15 is mainly used to supply air to the heat exchange chamber 2 and the baking room 1, so that the humid air in the baking room 1 can quickly pass through the air outlet 11 and be discharged through the dehumidification port 13 to avoid affecting the baking quality; the supply air fan 15 is connected to the controller signal, and the controller is used to control the power of the supply air fan 15 to adjust the air supply degree.

[0044] In this embodiment, when the dry-bulb target temperature is lower than 42°C: the supply air door is fully closed when the wet-bulb temperature minus the set wet-bulb temperature ≤0, and is opened 20% when it is >0 and ≤0.2, and the supply air door is opened 20% for every 0.1 increase thereafter; the dry-bulb target temperature is between 42-55°C: the supply air door is fully closed when the wet-bulb temperature minus the set wet-bulb temperature ≤-0.2, and is opened 20% for every 0.1 increase thereafter; the dry-bulb target temperature is greater than 55°C: the same control strategy as 42-55°C.

[0045] Example 4

[0046] This embodiment is a further technical solution of Embodiment 1. Figure 1 , Figure 5 , Figure 6 As shown, the tobacco baking rack 9 is a three-layer equidistant structure of upper, middle and lower layers, the upper rack structure is slightly lower than the height of the air inlet 7, and the spacing between the two adjacent rack structures and the lower rack structure and the bottom of the baking room 1 is adapted to the length of the tobacco plants; a number of detachable cross bars 16 are installed on each layer of the rack structure, and a number of comb-type cigarette clamps are arranged on the cross bars 16; the fruit and vegetable baking cart 10 includes a multi-layer bearing baking tray; the width of the fruit and vegetable baking cart 10 is smaller than the width of the tobacco baking rack 9, and the height of the fruit and vegetable baking cart 10 is between the height of the middle and lower rack structures of the tobacco baking rack 9; when baking fruits and vegetables, the cross bars on the lower rack structure of the tobacco baking rack 9 are removed, and an air duct partition 17 is laid on the middle rack structure, and an air flow channel is left between the air duct partition 17 and the side of the baking room 1 relative to the heat exchange chamber 2.

[0047] In this embodiment, two tobacco baking racks 9 are provided, and the two tobacco baking racks 9 are arranged left and right along the width direction of the baking room 1; two fruit and vegetable baking carts 10 are provided, and the two fruit and vegetable baking carts 10 are respectively located in the middle of the two tobacco baking racks 9.

[0048] When tobacco leaves are being baked, the tobacco leaves are evenly and neatly fixed by comb-type tobacco clamps, and the tobacco leaves are in a vertically spaced arrangement state. The baking work is started according to the baking scheme described in Example 1, and hot air enters the baking room 1 from the heat exchange chamber 2 through the air inlet 7, and flows from the upper space of the upper grill structure of the tobacco leaf baking grill 9 to the lower space, and the vertical air flow from top to bottom is used to achieve uniform baking of the tobacco leaves; when fruits and vegetables are being baked, the cross bar 16 on the lower grill structure of the tobacco leaf baking grill 9 is first removed, and the air duct partition 17 is laid on the middle grill structure, and then the fruit and vegetable baking cart 10 is pushed into the baking room, and the wet fruits and vegetables are evenly spread on the fruit and vegetable baking cart. In the carrying baking tray on the baking cart 10, the wet fruits and vegetables are in a horizontal arrangement state. The baking work is started according to the baking scheme described in Example 1. The hot air enters the baking room 1 from the heat exchange chamber 2 through the air inlet 7, and flows from the upper space of the air duct partition 17 through the air duct partition 17 and the air flow channel on the side of the baking room 1 relative to the heat exchange chamber 2 to the lower space. The horizontal air flow from right to left in the lower space of the air duct partition 17 can achieve uniform baking of the wet fruits and vegetables in the carrying baking tray; the air with residual heat and the air with moisture after flowing to the bottom of the baking room 1 flows to the heat exchange chamber 2 through the air outlet 11, and is discharged through the return air outlet 12 and the dehumidification outlet 13.

[0049] Example 5

[0050] This embodiment is a further technical solution of Embodiment 4. Figure 1 , Figure 4 As shown, a baking room door 18 is provided on the side of the baking room 1 opposite to the heat exchange chamber 2, and a door observation window 19 is provided on the baking room door 18; a plurality of wall observation windows 20 are provided on the left and right sides of the baking room 1, and the plurality of wall observation windows 20 are arranged in a stepped manner. In the present embodiment, the door observation window 19 is opened in the upper right corner area of ​​the baking room door 18, and there are three wall observation windows 20, which respectively correspond to the upper, middle and lower three-layer grill structures in the tobacco baking grill 9.

[0051] The door observation window 19 and the wall observation window 20 are used by the staff to observe in real time whether the baking state of the baked products in the baking room 1 is normal, so as to manually adjust the baking system.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dual-energy tobacco leaf, fruit and vegetable baking equipment, comprising a baking room (1) and a heat exchange chamber (2), characterized in that: The invention also comprises a heat pump unit and a combustion unit, wherein the heat pump unit comprises a heat pump body (3), wherein the heat pump body (3) is installed outside the heat exchange chamber (2), and a heat supply end of the heat pump body (3) is connected to the heat exchange chamber (2); the combustion unit comprises a burner (4), a buffer furnace body (5) and a heat exchange pipe (6), wherein the burner (4) is installed outside the heat exchange chamber (2), the buffer furnace body (5) and the heat exchange pipe (6) are both installed inside the heat exchange chamber (2), and the buffer furnace body (5) is respectively connected to the heat exchange pipe (6). The invention relates to a burner (4) and a heat exchange tube (6); the top of the baking room (1) and the heat exchange chamber (2) are connected through an air inlet (7), and a variable frequency fan (8) is installed on the upper part of the heat exchange chamber (2), and the position of the variable frequency fan (8) is lower than the position of the air inlet (7); the baking room (1) is provided with a tobacco baking grill (9) and a fruit and vegetable baking cart (10) compatible with the tobacco baking grill (9); and also includes a controller, and the heat pump unit, the burner unit and the variable frequency fan (8) are all connected to the controller signal.

2. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 1 is characterized in that: The baking room (1) is connected to the bottom of the heat exchange chamber (2) via an air outlet (11), and a return air outlet (12) is provided at the lower part of the heat exchange chamber (2) at a position corresponding to the air outlet (11).

3. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 2 is characterized in that: A dehumidification port (13) is also provided at the lower part of the heat exchange chamber (2) for connecting the heat exchange chamber (2) with the outside, and air supply ports (14) are provided on both sides of the heat exchange chamber (2), and air supply fans (15) are installed in the air supply ports (14), and the air supply fans (15) are connected to the controller signals.

4. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 1 is characterized in that: The tobacco leaf baking grill (9) is a three-layer structure with equal spacing of upper, middle and lower layers. The upper grill structure is slightly lower than the height of the air inlet (7). The spacing between two adjacent grill structures and the lower grill structure and the bottom of the baking room (1) is adapted to the length of the tobacco plants. A plurality of detachable cross bars (16) are installed on each grill structure, and a plurality of comb-type tobacco clamps are arranged on the cross bars (16).

5. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 4 is characterized in that: The fruit and vegetable baking cart (10) comprises a multi-layered baking tray; the width of the fruit and vegetable baking cart (10) is smaller than the width of the tobacco baking grill (9), and the height of the fruit and vegetable baking cart (10) is located between the heights of the middle and lower grill structures of the tobacco baking grill (9); when baking fruits and vegetables, the cross bar (16) on the lower grill structure of the tobacco baking grill (9) is removed, and an air duct partition (17) is laid on the middle grill structure, and an air flow channel is left between the air duct partition (17) and the side of the baking room (1) relative to the heat exchange chamber (2).

6. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 5 is characterized in that: Two tobacco baking racks (9) are provided, and the two tobacco baking racks (9) are arranged left and right along the width direction of the baking room (1); two fruit and vegetable baking carts (10) are provided, and the two fruit and vegetable baking carts (10) are respectively located in the middle of the two tobacco baking racks (9).

7. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 5 is characterized in that: A baking room door (18) is provided on the side of the baking room (1) opposite to the heat exchange chamber (2), and a door observation window (19) is provided on the baking room door (18).

8. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 7 is characterized in that: A plurality of wall observation windows (20) are arranged on the left and right sides of the baking room (1), and the plurality of wall observation windows (20) are arranged in a stepped manner.

9. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 1, characterized in that: The blowing direction of the variable frequency fan (8) is vertically upward, and arc-shaped air induction plates (21) are provided above the variable frequency fan (8) and at the top corner of the baking room (1) on the side opposite to the heat exchange chamber (2).

10. The dual-energy tobacco leaf, fruit and vegetable baking equipment according to claim 1, characterized in that: The buffer furnace body (5) is fixedly mounted on the bottom of the heat exchange chamber (2), and the heat exchange tube (6) is mounted above the buffer furnace body (5) in a multi-row and multi-column arrangement structure. Heat dissipation fins are evenly embedded on the outside of the heat exchange tube (6).

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