A multi-stage temperature control and recovery device for tea baking machine waste heat

Abstract

This invention relates to the field of tea roasting technology, specifically to a multi-stage temperature control and recovery device for waste heat from a tea roasting machine. The device includes: a roasting chamber with a rotating shaft inside, a tea tray mounted on the shaft, and a hot air blower installed in the roasting chamber; an air outlet pipe located at the top of the roasting chamber, with a first spiral tube inside the air outlet pipe, and preheating components connected to both ends of the first spiral tube; and an exhaust pipe connected to the air outlet pipe, with a leaf residue filter plate inside the exhaust pipe. The beneficial effects are: tea roasting is achieved through the hot air blower; during roasting, hot air is discharged through the air outlet pipe, and during discharge, heat transfer heats the water inside the first spiral tube. Then, through the cooperation of the drain pipe and water pump, the water flows into the interior of each group of heat dissipation pipes, thereby preheating the newly roasted tea leaves in the tea preheating tray, reducing the initial heating time of the tea roasting process. The hot air discharged from the air outlet pipe, through heat transfer, lowers the temperature of the hot air, achieving energy utilization.

Description

Technical Field

[0001] This invention relates to the field of tea roasting technology, specifically to a multi-stage temperature control and recovery device for waste heat from a tea roasting machine. Background Technology

[0002] Tea roasting is the final step in the tea-making process. Its purpose is to evaporate excess moisture from the tea leaves, promote the thermal transformation and aroma-enhancing effects of the leaf components, and improve and fix the quality for better storage.

[0003] Tea roasting typically requires several hours of roasting using a roasting machine. During roasting, hot air is continuously supplied to the tea leaves to heat them and remove moisture. At the same time, gases need to be exhausted to remove the humid air in order to increase roasting efficiency. However, the exhaust gases often have high heat content. The direct release of heat not only wastes energy but also deteriorates the workshop environment. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage temperature control and recovery device for waste heat from a tea roasting machine, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A multi-stage temperature control and recovery device for waste heat from a tea roasting machine includes:

[0007] A baking oven, wherein a rotating shaft is provided inside the baking oven, and multiple sets of tea trays are installed on the rotating shaft, and a hot air blower is installed at the position of the multiple sets of tea trays.

[0008] An air outlet duct is connected to the top of the baking oven, and a first spiral tube is provided inside the air outlet duct. A water inlet pipe and a drain pipe are respectively connected to the two ends of the first spiral tube. A preheating component is connected to the end of the water inlet pipe and the drain pipe away from the first spiral tube.

[0009] An exhaust duct is connected to the outlet duct, and a leaf residue filter plate is installed inside the exhaust duct. A cleaning component is installed inside the exhaust duct at a position corresponding to the upper part of the leaf residue filter plate.

[0010] Furthermore, a motor is provided at the bottom of the baking box, and the output end of the motor passes through the bottom of the baking box and is connected to the end of the rotating shaft. Multiple tea trays rotate inside the baking box through the cooperation of the motor and the rotating shaft.

[0011] Furthermore, the hot air blower is provided in two sets, and the two sets of hot air blowers are respectively located on the outer sides of the baking oven, and the output ports of the two sets of hot air blowers are connected to the interior of the baking oven;

[0012] The inner wall of the baking oven is equipped with filters at the locations corresponding to the output ports of the two sets of hot air blowers.

[0013] Furthermore, the preheating component includes a tea preheating placement plate installed on the side wall of the baking oven, and the interior of the tea preheating placement plate is provided with multiple sets of spaced heat dissipation pipes, and each heat dissipation pipe is connected through the tea preheating placement plate;

[0014] One end of one set of heat dissipation pipes is connected to the end of the water inlet pipe away from the first spiral pipe;

[0015] A water pump is connected to the end of the drain pipe away from the first spiral pipe, and the output end of the water pump is connected to the end of another set of heat dissipation pipes.

[0016] Furthermore, the interior of the first spiral tube is provided with a suitable spiral guide plate.

[0017] Furthermore, the upper end of the air outlet pipe is connected to an exhaust pipe, which has a "Z" shaped structure;

[0018] The middle section of the exhaust pipe is equipped with a second spiral pipe. The two ends of the second spiral pipe are respectively connected to an air outlet pipe and an air inlet pipe. The end of the air inlet pipe away from the second spiral pipe is connected to a blower pump.

[0019] A connecting cover is rotatably fitted onto the top of the rotating shaft, and a countersunk hole is provided at the lower end of the connecting cover. The end of the air outlet pipe away from the second spiral tube passes through the connecting cover and communicates with the countersunk hole.

[0020] Furthermore, a ventilation hole is provided at the upper end of the rotating shaft, and the air outlet pipe is connected to the ventilation hole through the cooperation of the connecting cover and the countersunk hole;

[0021] Each of the tea-holding trays has a vortex-shaped heat dissipation pipe installed on its upper inner surface. An exhaust pipe is provided inside the tea-holding tray at the end position of the vortex-shaped heat dissipation pipe, and the vortex-shaped heat dissipation pipe is connected to the ventilation hole through the exhaust pipe.

[0022] The end of the vortex-shaped heat dissipation pipe away from the exhaust pipe is connected to the interior of the baking oven.

[0023] Furthermore, an arc-shaped groove is provided at the middle end of the exhaust pipe, and a leaf residue filter plate is inserted into the arc-shaped groove.

[0024] The outer surface of the leaf residue filter plate is connected to a first connecting plate, and a fixing plate is installed on the outer surface of the exhaust pipe at a position corresponding to the first connecting plate. A fixing bolt is screwed into the connection between the first connecting plate and the fixing plate.

[0025] Furthermore, the cleaning component includes a drive shaft disposed above the leaf residue filter plate, and a fixing frame is installed inside the exhaust pipe at a position corresponding to the drive shaft. The drive shaft is rotatably disposed above the leaf residue filter plate via the fixing frame.

[0026] The upper end of the drive shaft is provided with multiple sets of blades, and the lower end of the drive shaft is provided with multiple sets of second connecting plates. Each second connecting plate has a first storage groove at its lower end. Each first storage groove has a cleaning plate inside, and a first return spring is provided between the upper end of each cleaning plate and the top of the corresponding first storage groove.

[0027] Each of the cleaning plates is in elastic contact with the upper surface of the leaf residue filter plate through the cooperation of multiple sets of the first reset springs.

[0028] Furthermore, the upper surface of the leaf residue filter plate is provided with at least one set of collection chambers, and the top of the inner side wall of the collection chamber is provided with a second storage groove, the opening direction of the second storage groove is adapted to the rotation direction of the second connecting plate.

[0029] The second storage slot is provided with a baffle plate inside, and multiple sets of second return springs are provided between the end of the baffle plate and the inner wall of the second storage slot at intervals.

[0030] The upper end of the cover plate away from the second return spring is provided with a third storage groove. A support block is inserted into the third storage groove. A third return spring is provided between the lower end of the support block and the bottom end of the third storage groove. The support block is elastically connected to the cover plate through the third return spring. The side wall of the support block facing the rotation direction of the second connecting plate is provided with a beveled surface.

[0031] The elastic force of the second reset spring is less than that of the third reset spring;

[0032] Multiple sets of through holes are opened at the bottom of the collection chamber, and the through holes penetrate the bottom of the leaf residue filter plate.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] 1. This invention uses a hot air blower to roast tea leaves inside a roasting oven. During the roasting process, hot air is discharged through the air outlet pipe. When discharged, the water inside the first spiral tube is heated through heat transfer. The heated water flows into the interior of each set of heat dissipation pipes through the cooperation of the drain pipe and the water pump, thereby preheating the new tea leaves to be roasted in the tea preheating placement plate, reducing the heating time in the early stage of tea roasting. The hot air discharged from the air outlet pipe reduces the temperature of the hot air through heat transfer, thus realizing energy utilization.

[0035] 2. The hot air discharged from the air outlet duct can be discharged into the water tank through the exhaust duct to heat the water in the tank for convenient daily use. At the same time, when the hot air is discharged through the exhaust duct, it is transferred to the air inside the second spiral tube through heat transfer, heating the air inside the second spiral tube. The heated air is discharged into the ventilation hole through the air outlet duct and the connecting cover. The ventilation hole then heats the vortex heat dissipation tube through the exhaust pipe. After the vortex heat dissipation tube is heated, it can transfer heat to the tea leaves on the tea tray, heating the tea leaves at the bottom of the tea tray and preventing uneven heating of the tea leaves on the tea tray.

[0036] 3. After the hot air is used to roast the tea leaves, it is discharged through the air outlet and exhaust pipes. During the discharge, some small leaf residues will be discharged along with the hot air. The leaf residue filter plate inside the exhaust pipe can filter the leaf residues. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0038] Figure 2 This is a schematic diagram of the back of the three-dimensional structure of the present invention;

[0039] Figure 3 This is a schematic diagram of the internal structure of the air outlet duct of the present invention;

[0040] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0041] Figure 5 This is a schematic diagram of the internal structure of the first spiral tube of the present invention;

[0042] Figure 6 This is a cross-sectional schematic diagram of the tea tray, rotating shaft, and connecting cover structure of the present invention;

[0043] Figure 7 This is a schematic diagram of the connection between the exhaust pipe and the first connecting plate of the present invention;

[0044] Figure 8 This is a schematic diagram of the internal structure of the exhaust duct of the present invention;

[0045] Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point B;

[0046] Figure 10 This is a schematic diagram showing the connection between the exhaust pipe and the leaf residue filter plate of the present invention;

[0047] Figure 11 This is a cross-sectional schematic diagram of the connection between the exhaust pipe and the leaf residue filter plate structure of the present invention;

[0048] Figure 12 for Figure 11 Enlarged schematic diagram of the structure at point C.

[0049] In the diagram: 1. Baking oven; 2. Hot air blower; 3. Motor; 4. Shaft; 5. Air outlet pipe; 6. Water inlet pipe; 7. Drain pipe; 8. Exhaust pipe; 9. Air pump; 10. Air outlet pipe; 11. Filter screen; 12. Tea tray; 13. Water pump; 14. Tea preheating tray; 15. Heat dissipation pipe; 16. First spiral pipe; 17. Spiral guide plate; 18. Ventilation hole; 19. Connecting cover; 20. Countersunk hole; 21. Vortex heat dissipation pipe; 23. Exhaust pipe; 24. First connecting plate; 25. Fixing plate; 26. Second spiral pipe; 27. Drive shaft; 28. Blade; 29. ​​Arc groove; 30. Leaf residue filter plate; 31. Second connecting plate; 32. First storage slot; 33. Cleaning plate; 34. First return spring; 35. Collection chamber; 36. Cover plate; 37. Second storage slot; 38. Second return spring; 39. Through hole; 41. Third storage slot; 42. Third return spring; 43. Support block; 44. Beveled surface; 45. Detailed Implementation

[0050] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples. Example 1:

[0051] Please see Figures 1 to 12 This invention provides a technical solution: a multi-stage temperature control and recovery device for waste heat from a tea roasting machine, comprising:

[0052] The baking oven 1 has a rotating shaft 4 inside, and multiple sets of tea trays 13 are installed on the rotating shaft 4. A hot air blower 2 is installed in the baking oven 1 at the positions corresponding to the multiple sets of tea trays 13.

[0053] An air outlet duct 5 is connected to the top of the baking oven 1, and a first spiral tube 17 is provided inside the air outlet duct 5. The two ends of the first spiral tube 17 are respectively connected to a water inlet pipe 6 and a drain pipe 7. The end of the water inlet pipe 6 and the drain pipe 7 away from the first spiral tube 17 is connected to a preheating component.

[0054] The exhaust pipe 8 is connected to the air outlet pipe 5, and the exhaust pipe 8 is provided with a leaf residue filter plate 31. A cleaning component is provided inside the exhaust pipe 8 at a position above the leaf residue filter plate 31.

[0055] The hot air blower 2 roasts the tea leaves on the tea tray 13. During the roasting process, the rotating shaft 4 drives multiple tea trays 13 to rotate, making the tea roasting more even.

[0056] During the roasting process, hot air is discharged through the air outlet 5. When discharged, the water inside the first spiral tube 17 is heated through heat transfer. The heated water then heats the new tea leaves on the preheating component, thus realizing the utilization of energy.

[0057] After the hot air is used to roast the tea leaves, it is discharged through the air outlet duct 5 and the exhaust duct 8. During the discharge, some small leaf residues are discharged along with the hot air. The leaf residue filter plate 31 inside the exhaust duct 8 can filter the leaf residues. During the filtration process, the cleaning component can clean the leaf residues filtered by the leaf residue filter plate 31 to prevent the leaf residues from clogging the filter holes on the leaf residue filter plate 31. Example 2:

[0058] like Figures 1-2 As shown, the multi-stage temperature control and recovery device for waste heat from the tea roasting machine disclosed in Embodiment 2 of the present invention has a structure that is basically the same as that in Embodiment 1, except that:

[0059] A motor 3 is installed at the bottom of the baking box 1. The output end of the motor 3 passes through the bottom of the baking box 1 and is connected to the end of the rotating shaft 4. Multiple tea trays 13 rotate inside the baking box 1 through the cooperation of the motor 3 and the rotating shaft 4.

[0060] The hot air blower 2 is provided in two sets, and the two sets of hot air blowers 2 are respectively located on the outside of the baking oven 1, and the output ports of the two sets of hot air blowers 2 are connected to the inside of the baking oven 1.

[0061] The inner wall of the baking oven 1 is equipped with a filter screen 12 at the output port positions of the two sets of hot air blowers 2.

[0062] The hot air blower 2 roasts the tea leaves on the tea tray 13. During the roasting process, the rotating shaft 4 drives multiple tea trays 13 to rotate, making the tea roasting more even.

[0063] The filter screen 12 is designed to filter the hot air discharged from the hot air blower 2, preventing the entry of external impurities. The filter screen 12 is designed to be removable for easy cleaning. Example 3:

[0064] like Figures 2-5As shown, the multi-stage temperature control and recovery device for waste heat from the tea roasting machine disclosed in Embodiment 3 of the present invention has a structure that is basically the same as that in Embodiment 2, except that:

[0065] The preheating component includes a tea preheating placement plate 15 installed on the side wall of the baking oven 1. The tea preheating placement plate 15 is provided with multiple sets of spaced heat dissipation pipes 16 inside, and each heat dissipation pipe 16 is connected through the tea preheating placement plate 15.

[0066] One end of one set of heat dissipation pipes 16 is connected to the end of the water inlet pipe 6 away from the first spiral pipe 17;

[0067] The end of the drain pipe 7 away from the first spiral pipe 17 is connected to a water pump 14, and the output end of the water pump 14 is connected to the end of another set of heat dissipation pipes 16.

[0068] The first spiral tube 17 is provided with a matching spiral guide plate 18 inside;

[0069] During the roasting process, hot air is discharged through the air outlet 5. When discharged, the water inside the first spiral tube 17 is heated through heat transfer. The heated water flows into the interior of each group of heat dissipation tubes 16 through the cooperation of the drain pipe 7 and the water pump 14, thereby preheating the new tea leaves to be roasted in the tea preheating plate 15, reducing the heating time in the early stage of tea roasting. The hot air discharged from the air outlet 5 is cooled down through heat transfer, thus realizing energy utilization.

[0070] The spiral guide plate 18 causes the water flow to rise in a vortex shape, increasing turbulence and improving heat exchange efficiency. Example 4:

[0071] like Figures 1-8 As shown, the multi-stage temperature control and recovery device for waste heat from the tea roasting machine disclosed in Embodiment 4 of the present invention has a structure that is basically the same as that in Embodiment 3, except that:

[0072] The upper end of the air outlet pipe 5 is connected to the exhaust pipe 8, which has a "Z" shaped structure.

[0073] The middle section of the exhaust pipe 8 is provided with a second spiral pipe 27. The two ends of the second spiral pipe 27 are respectively connected to an air outlet pipe 10 and an air inlet pipe 11. The end of the air inlet pipe 11 away from the second spiral pipe 27 is connected to a blower pump 9.

[0074] The top end of the rotating shaft 4 is rotatably fitted with a connecting cover 20, and the lower end of the connecting cover 20 is provided with a countersunk hole 21. The end of the air outlet pipe 10 away from the second spiral pipe 27 passes through the connecting cover 20 and communicates with the countersunk hole 21.

[0075] The upper end of the rotating shaft 4 is provided with a ventilation hole 19, and the air outlet pipe 10 is connected to the ventilation hole 19 through the cooperation of the connecting cover 20 and the countersunk hole 21;

[0076] Each of the tea placing trays 13 is provided with a vortex heat dissipation pipe 23 on its inner upper surface. An exhaust pipe 24 is provided inside the tea placing tray 13 at the end position corresponding to the vortex heat dissipation pipe 23. The vortex heat dissipation pipe 23 is connected to the ventilation hole 19 through the exhaust pipe 24.

[0077] The end of the vortex heat dissipation pipe 23 away from the exhaust pipe 24 is connected to the interior of the baking oven 1;

[0078] The hot air discharged from the air outlet duct 5 can be discharged into the water tank through the exhaust duct 8 to heat the water in the tank for convenient daily use. At the same time, when the hot air is discharged through the exhaust duct 8, it is transferred to the air inside the second spiral tube 27 through heat transfer, heating the air inside the second spiral tube 27. The heated air is discharged into the ventilation hole 19 through the cooperation of the air outlet duct 10 and the connecting cover 20. The ventilation hole 19 then heats the vortex heat dissipation tube 23 through the exhaust pipe 24. After the vortex heat dissipation tube 23 is heated, it can transfer heat to the tea leaves on the tea placing tray 13, heating the tea leaves at the bottom of the tea placing tray 13 and preventing uneven heating of the tea leaves on the tea placing tray 13. Example 5:

[0079] like Figure 9 As shown, the multi-stage temperature control and recovery device for waste heat from a tea roasting machine disclosed in Embodiment 5 of the present invention has a structure that is basically the same as that in Embodiment 4, except that:

[0080] An arc-shaped groove 30 is provided at the middle end of the exhaust pipe 8, and a leaf residue filter plate 31 is inserted into the arc-shaped groove 30.

[0081] The outer surface of the leaf residue filter plate 31 is connected to a first connecting plate 25, and the outer surface of the exhaust pipe 8 is equipped with a fixing plate 26 at a position corresponding to the first connecting plate 25. The connection between the first connecting plate 25 and the fixing plate 26 is screwed with fixing bolts.

[0082] The cleaning assembly includes a drive shaft 28 disposed above the leaf residue filter plate 31. A fixing frame is installed inside the exhaust pipe 8 at a position corresponding to the drive shaft 28. The drive shaft 28 is rotatably disposed above the leaf residue filter plate 31 via the fixing frame.

[0083] The upper end of the drive shaft 28 is provided with multiple sets of blades 29, and the lower end of the drive shaft 28 is provided with multiple sets of second connecting plates 32. Each second connecting plate 32 has a first storage groove 33 at its lower end. Each first storage groove 33 has a cleaning plate 34 inside, and a first return spring 35 is provided between the upper end of each cleaning plate 34 and the corresponding top end of the inner part of the first storage groove 33.

[0084] Each of the cleaning plates 34 is in elastic contact with the upper end surface of the leaf residue filter plate 31 through the cooperation of a plurality of corresponding sets of the first reset springs 35.

[0085] After the hot air is used to roast the tea leaves, it is discharged through the air outlet duct 5 and the exhaust duct 8. When it is discharged, some small leaf residues will be discharged along with it. The leaf residue filter plate 31 inside the exhaust duct 8 can filter the leaf residues.

[0086] Meanwhile, as the hot air flows, it drives the drive shaft 28 to rotate through the blades 29, which in turn drives the second connecting plate 32 above the leaf residue filter plate 31 to rotate. When the second connecting plate 32 rotates, the elastically set cleaning plate 34 cleans the leaf residue filtered out by the leaf residue filter plate 31, preventing the leaf residue from clogging the filter holes on the leaf residue filter plate 31. Example 6:

[0087] like Figures 10-12 As shown, the multi-stage temperature control and recovery device for waste heat from a tea roasting machine disclosed in Embodiment Six of the present invention has a structure that is basically the same as that in Embodiment Five, except that:

[0088] At least one set of collection chambers 36 are provided on the upper end face of the leaf residue filter plate 31. A second storage groove 38 is provided on the top of the inner side wall of the collection chamber 36. The opening direction of the second storage groove 38 is adapted to the rotation direction of the second connecting plate 32.

[0089] The second storage groove 38 is provided with a cover plate 37 inside, and multiple sets of second return springs 39 are provided between the end of the cover plate 37 and the inner wall of the second storage groove 38.

[0090] The upper end of the cover plate 37 away from the second return spring 39 is provided with a third storage groove 42. A support block 44 is inserted into the third storage groove 42. A third return spring 43 is provided between the lower end of the support block 44 and the bottom end of the third storage groove 42. The support block 44 is elastically connected to the cover plate 37 through the third return spring 43. A chamfered surface 45 is provided on the side wall of the support block 44 facing the rotation direction of the second connecting plate 32.

[0091] The elastic force of the second return spring 39 is less than the elastic force of the third return spring 43;

[0092] Multiple sets of through holes 41 are opened at the bottom of the inside of the collection chamber 36, and the through holes 41 penetrate the bottom of the leaf residue filter plate 31;

[0093] When cleaning the leaf debris, the leaf debris accumulates on one side of the cleaning plate 34. When the cleaning plate 34 rotates, it touches the abutment block 44 and pushes the abutment block 44 to push the cover plate 37. When the cover plate 37 moves, the upper port of the collection chamber 36 is opened. At this time, the cleaned leaf debris falls into the collection chamber 36 under the action of hot air. The hot air is discharged through the through hole 41, and the leaf debris is concentrated inside the collection chamber 36. When the cover plate 37 is pushed to the end position, the elastically set abutment block 44 is held down by the cleaning plate 34 under the action of the inclined surface 45. When the abutment block 44 is misaligned with the cleaning plate 34, the cover plate 37 is reset under the action of the second return spring 39, completing the sealing of the collection chamber 36.

[0094] The specific steps of this solution are as follows: Place the tea leaves to be roasted on the tea placement tray 13, then close the door of the roasting box 1. After closing, start the hot air blower 2 and the motor 3. The hot air blower 2 roasts the tea leaves on the tea placement tray 13. During the roasting process, the rotating shaft 4 drives multiple tea placement trays 13 to rotate, making the tea roasting more even. When roasting, the next set of tea leaves to be roasted can be placed on the tea preheating plate 15.

[0095] During the roasting process, hot air is discharged through the air outlet pipe 5. When discharged, the water inside the first spiral pipe 17 is heated through heat transfer. The heated water flows into the interior of each group of heat dissipation pipes 16 through the cooperation of the drain pipe 7 and the water pump 14, thereby preheating the new tea leaves to be roasted in the tea preheating placement plate 15 and reducing the heating time in the early stage of tea roasting.

[0096] The hot air discharged from the air outlet duct 5 can be discharged into the water tank through the exhaust duct 8 to heat the water in the tank for convenient daily use. At the same time, when the hot air is discharged through the exhaust duct 8, it is transferred to the air inside the second spiral tube 27 through heat transfer, heating the air inside the second spiral tube 27. The heated air is discharged into the ventilation hole 19 through the cooperation of the air outlet duct 10 and the connecting cover 20. The ventilation hole 19 then heats the vortex heat dissipation tube 23 through the exhaust pipe 24. After the vortex heat dissipation tube 23 is heated, it can transfer heat to the tea leaves on the tea leaf placement tray 13, heating the tea leaves at the bottom of the tea leaf placement tray 13 and preventing uneven heating of the tea leaves on the tea leaf placement tray 13.

[0097] After the hot air is used to roast the tea leaves, it is discharged through the air outlet duct 5 and the exhaust duct 8. When it is discharged, some small leaf residues will be discharged along with it. The leaf residue filter plate 31 inside the exhaust duct 8 can filter the leaf residues.

[0098] Simultaneously, as the hot air flows, it drives the transmission shaft 28 to rotate via the blades 29, which in turn drives the second connecting plate 32 above the leaf residue filter plate 31 to rotate. When the second connecting plate 32 rotates, the elastically set cleaning plate 34 cleans the leaf residue filtered by the leaf residue filter plate 31, preventing the leaf residue from clogging the filter holes on the leaf residue filter plate 31. During cleaning, the leaf residue accumulates on one side of the cleaning plate 34. When the cleaning plate 34 rotates, it touches the abutment block 44, and then pushes the abutment block 44 to push the baffle plate 37. When the baffle 37 moves, the upper port of the collection chamber 36 is opened, and the cleaned leaf debris falls into the collection chamber 36. When the baffle 37 is pushed to the end position, the elastically set abutment block 44 is held down by the cleaning plate 34 under the action of the inclined surface 45. When the abutment block 44 and the cleaning plate 34 are misaligned, the baffle 37 is reset under the action of the second reset spring 39, thus completing the sealing of the collection chamber 36. When it is necessary to clean the leaf debris inside the collection chamber 36, the leaf debris filter plate 31 can be removed from the exhaust pipe 8 by disassembling the first connecting plate 25.

[0099] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A multi-stage temperature control and recovery device for waste heat from a tea roasting machine, characterized in that, include: A baking oven (1) is provided with a rotating shaft (4) inside the baking oven (1). Multiple sets of tea trays (13) are installed on the rotating shaft (4) at intervals. A hot air blower (2) is installed in the baking oven (1) at the position corresponding to the multiple sets of tea trays (13). An air outlet pipe (5) is connected to the top of the baking oven (1), and a first spiral pipe (17) is provided inside the air outlet pipe (5). A water inlet pipe (6) and a drain pipe (7) are respectively connected to the two ends of the first spiral pipe (17). A preheating component is connected to the end of the water inlet pipe (6) and the drain pipe (7) away from the first spiral pipe (17). An exhaust pipe (8) is connected to the air outlet pipe (5), and a leaf residue filter plate (31) is provided inside the exhaust pipe (8). A cleaning component is provided inside the exhaust pipe (8) at a position above the leaf residue filter plate (31). The upper end of the air outlet pipe (5) is connected to the exhaust pipe (8), which has a "Z" shaped structure; The middle section of the exhaust pipe (8) is provided with a second spiral pipe (27). The two ends of the second spiral pipe (27) are respectively connected to an air outlet pipe (10) and an air inlet pipe (11). The end of the air inlet pipe (11) away from the second spiral pipe (27) is connected to a blower pump (9). The top end of the rotating shaft (4) is fitted with a connecting cover (20), and the lower end of the connecting cover (20) is provided with a countersunk hole (21). The end of the air outlet pipe (10) away from the second spiral pipe (27) passes through the connecting cover (20) and communicates with the countersunk hole (21). The upper end of the rotating shaft (4) is provided with a ventilation hole (19), and the air outlet pipe (10) is connected to the ventilation hole (19) through the cooperation of the connecting cover (20) and the countersunk hole (21); Each of the tea placing trays (13) is provided with a vortex heat dissipation pipe (23) on its inner upper surface. An exhaust pipe (24) is provided inside the tea placing tray (13) at the end position of the vortex heat dissipation pipe (23). The vortex heat dissipation pipe (23) is connected to the ventilation hole (19) through the exhaust pipe (24). The end of the vortex heat dissipation pipe (23) away from the exhaust pipe (24) is connected to the interior of the baking oven (1).

2. The multi-stage temperature control and recovery device for waste heat from a tea roasting machine according to claim 1, characterized in that, The bottom of the baking box (1) is equipped with a motor (3). The output end of the motor (3) passes through the bottom of the baking box (1) and is connected to the end of the rotating shaft (4). Multiple tea trays (13) rotate inside the baking box (1) through the cooperation of the motor (3) and the rotating shaft (4).

3. The multi-stage temperature control and recovery device for waste heat from a tea roasting machine according to claim 1, characterized in that, The hot air blower (2) is provided in two sets. The two sets of hot air blowers (2) are respectively located on the outside of the baking box (1), and the output ports of the two sets of hot air blowers (2) are connected to the inside of the baking box (1). The inner wall of the baking oven (1) is equipped with a filter screen (12) at the output port positions of the two sets of hot air blowers (2).

4. The multi-stage temperature control and recovery device for waste heat from a tea roasting machine according to claim 1, characterized in that, The preheating assembly includes a tea preheating placement plate (15) installed on the side wall of the baking oven (1). The tea preheating placement plate (15) is provided with multiple sets of spaced heat dissipation pipes (16), and each heat dissipation pipe (16) is connected through the tea preheating placement plate (15). One end of one set of heat dissipation pipes (16) is connected to the end of the water inlet pipe (6) away from the first spiral pipe (17); The drain pipe (7) is connected to a water pump (14) at one end away from the first spiral pipe (17), and the output end of the water pump (14) is connected to the end of another set of heat dissipation pipes (16).

5. The multi-stage temperature control and recovery device for waste heat from a tea roasting machine according to claim 4, characterized in that, The first spiral tube (17) is provided with a suitable spiral guide plate (18).

6. The multi-stage temperature control and recovery device for waste heat from a tea roasting machine according to claim 1, characterized in that, The exhaust pipe (8) has an arc-shaped groove (30) at the middle end, and a leaf residue filter plate (31) is inserted into the arc-shaped groove (30). The outer surface of the leaf residue filter plate (31) is connected to a first connecting plate (25), and a fixing plate (26) is installed on the outer surface of the exhaust pipe (8) at a position corresponding to the first connecting plate (25). A fixing bolt is screwed at the connection between the first connecting plate (25) and the fixing plate (26).

7. The multi-stage temperature control and recovery device for waste heat from a tea roasting machine according to claim 6, characterized in that, The cleaning assembly includes a drive shaft (28) disposed above the leaf residue filter plate (31), and a fixing frame is installed inside the exhaust pipe (8) at a position corresponding to the drive shaft (28). The drive shaft (28) is rotatably disposed above the leaf residue filter plate (31) via the fixing frame. The upper end of the drive shaft (28) is provided with multiple sets of blades (29), and the lower end of the drive shaft (28) is provided with multiple sets of second connecting plates (32). Each second connecting plate (32) has a first storage groove (33) at its lower end. Each first storage groove (33) has a cleaning plate (34) inside it. A first return spring (35) is provided between the upper end of each cleaning plate (34) and the top end of the corresponding first storage groove (33). Each of the cleaning plates (34) is in elastic contact with the upper surface of the leaf residue filter plate (31) through the cooperation of the corresponding multiple sets of the first reset springs (35).

8. The multi-stage temperature control and recovery device for waste heat from a tea roasting machine according to claim 7, characterized in that, The upper end face of the leaf residue filter plate (31) is provided with at least one set of collection chambers (36), and the top of the inner side wall of the collection chamber (36) is provided with a second storage groove (38), and the opening direction of the second storage groove (38) is adapted to the rotation direction of the second connecting plate (32). The second storage groove (38) is provided with a cover plate (37) inside, and multiple sets of second return springs (39) are provided between the end of the cover plate (37) and the inner wall of the second storage groove (38). The upper end of the cover plate (37) away from the second return spring (39) is provided with a third storage groove (42). A support block (44) is inserted into the third storage groove (42). A third return spring (43) is provided between the lower end of the support block (44) and the bottom end of the third storage groove (42). The support block (44) is elastically connected to the cover plate (37) through the third return spring (43). The support block (44) has a beveled surface (45) on the side wall facing the rotation direction of the second connecting plate (32). The elastic force of the second return spring (39) is less than the elastic force of the third return spring (43); Multiple sets of through holes (41) are opened at the bottom of the collection chamber (36), and the through holes (41) penetrate the bottom of the leaf residue filter plate (31).

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