Multi-stage temperature control waste heat recovery device of tea baking machine

Abstract

The invention relates to the technical field of tea leaf baking, in particular to a tea leaf baking machine waste heat multi-stage temperature control recovery device which comprises a baking oven, a tea leaf storage tray is mounted on a rotating shaft which is arranged in the baking oven, and an air heater is mounted on the baking oven; the air outlet pipe is arranged at the top of the baking oven, a first spiral pipe is arranged in the air outlet pipe, and the two ends of the first spiral pipe are connected with preheating assemblies; the exhaust pipe is communicated with the air outlet pipe, and a leaf residue filter plate is arranged in the exhaust pipe; the tea leaf baking device has the beneficial effects that tea leaves are baked through an air heater, in the baking process, hot air is discharged through an air outlet pipe, when the hot air is discharged, water in a first spiral pipe is heated through heat transfer, then through cooperation of a drainage pipe and a water pump, the water flows into all sets of heat dissipation pipes, and therefore new tea leaves needing to be baked in a tea leaf preheating placement plate are preheated; the temperature rise time in the early stage of tea baking is shortened, hot air exhausted from the air outlet pipe is subjected to heat transfer, the hot air temperature is reduced, and energy utilization is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tea baking, in particular to a multi-stage temperature control recovery device for waste heat of a tea baking machine. Background Art

[0002] Tea baking is the last step in the tea making process. Its purpose is to evaporate the excess water in the tea leaves, promote the heating and aroma formation of the leaves, and enhance and fix the quality to facilitate storage. Tea roasting usually requires using a roasting machine for many hours. During roasting, hot air is usually continuously supplied to the tea leaves to heat and remove moisture. At the same time, exhaust gas is needed to expel the moist air to increase roasting efficiency. However, the exhaust gas often has a high heat content. The direct emission of heat not only wastes energy but also deteriorates the workshop environment. Summary of the Invention

[0003] The object of the present invention is to provide a multi-stage temperature control and recovery device for waste heat of a tea roasting machine, so as to solve the problems raised by the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A multi-stage temperature control recovery device for waste heat from a tea roasting machine, comprising: A baking box, wherein a rotating shaft is provided inside the baking box, and a plurality of tea trays arranged at intervals are mounted on the rotating shaft, and a hot air blower is installed at positions of the baking box corresponding to the plurality of tea trays; An air outlet duct is arranged in communication with the top of the baking oven, and a first spiral tube is arranged inside the air outlet duct, and the two ends of the first spiral tube are respectively connected to a water inlet pipe and a drain pipe, and the ends of the water inlet pipe and the drain pipe away from the first spiral tube are connected to a preheating assembly; An exhaust pipe is communicated with the air outlet pipe, and a leaf residue filter plate is provided inside the exhaust pipe. A cleaning component is provided inside the exhaust pipe at a position above the leaf residue filter plate.

[0005] Furthermore, a motor is provided at the bottom end of the baking box, an output end of the motor passes through the bottom of the baking box and is connected to the end of the rotating shaft, and multiple groups of tea trays rotate inside the baking box through the cooperation of the motor and the rotating shaft.

[0006] Furthermore, the hot air blowers are provided in two groups, and the two groups of hot air blowers are respectively provided on both sides of the outside of the baking box, and the output ports of the two groups of hot air blowers are both connected to the interior of the baking box; Filters are installed on the inner wall of the baking box at positions corresponding to the output ports of the two groups of hot air blowers.

[0007] Furthermore, the preheating assembly includes a tea preheating placement plate mounted on a side wall of the baking box, wherein a plurality of heat dissipation pipes are arranged inside the tea preheating placement plate, and each of the heat dissipation pipes is connected through the tea preheating placement plate; The end of one group of the heat dissipation pipes is connected to an end of the water inlet pipe away from the first spiral pipe; One end of the drainage pipe away from the first spiral pipe is connected to a water pump, and the output end of the water pump is connected to the end of another group of the heat dissipation pipes.

[0008] Furthermore, an adapted spiral guide plate is provided inside the first spiral tube.

[0009] Furthermore, the upper end of the air outlet pipe is connected to an exhaust pipe, and the exhaust pipe is in a "Z"-shaped structure; A second spiral tube is provided inside the middle section of the exhaust tube, and both ends of the second spiral tube are connected to an air outlet pipe and an air inlet pipe respectively, and an end of the air inlet pipe away from the second spiral tube is connected to an air pump; A connecting cover is rotatably sleeved on the top end of the rotating shaft, a countersunk hole is opened at the lower end of the connecting cover, and one end of the air outlet pipe away from the second spiral pipe passes through the connecting cover and is connected to the countersunk hole.

[0010] 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 between the connecting cover and the countersunk hole; The upper end surface of each tea tray is provided with a vortex heat dissipation pipe, and an exhaust duct is opened at the position of the end of the tea tray corresponding to the vortex heat dissipation pipe, and the vortex heat dissipation pipe is connected to the ventilation hole through the exhaust duct; One end of the vortex heat dissipation pipe away from the exhaust duct is communicated with the interior of the baking box.

[0011] 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; 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 at the connection between the first connecting plate and the fixing plate.

[0012] Furthermore, the cleaning assembly includes a transmission shaft arranged above the leaf residue filter plate, a fixing bracket is installed inside the exhaust pipe at a position corresponding to the transmission shaft, and the transmission shaft is rotatably arranged above the leaf residue filter plate through the fixing bracket; The upper end of the transmission shaft is provided with a plurality of blades, and the lower end of the transmission shaft is provided with a plurality of second connecting plates, the lower end of each second connecting plate is provided with a first receiving groove, a cleaning plate is provided inside each first receiving groove, and a first return spring is provided between the upper end of each cleaning plate and the inner top end of the corresponding first receiving groove; Each of the cleaning plates is in elastic contact with the upper end surface of the leaf residue filtering plate through the cooperation of the corresponding multiple groups of the first return springs.

[0013] Furthermore, at least one set of collecting cavities is formed on the upper end surface of the leaf residue filter plate, and a second receiving groove is formed at the top end of the inner side wall of the collecting cavity, and the opening direction of the second receiving groove is adapted to the rotation direction of the second connecting plate; A shield is provided inside the second receiving groove, and a plurality of groups of second return springs are provided between the end of the shield and the inner wall of the second receiving groove; A third receiving groove is formed at an upper end portion of an end of the shutter away from the second return spring, a holding block is inserted into the interior of the third receiving groove, and a third return spring is provided between the lower end portion of the holding block and the bottom end of the third receiving groove, the holding block is elastically connected to the shutter via the third return spring, and a side wall of the holding block facing the rotation direction of the second connecting plate is formed with a chamfered surface; The elastic force of the second return spring is smaller than the elastic force of the third return spring; A plurality of through holes are provided at the bottom end of the collecting chamber, and the through holes penetrate the bottom of the leaf residue filtering plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses a hot air blower to bake tea leaves inside the baking box. During the baking process, hot air is discharged through the air outlet pipe. When discharged, it heats the water inside the first spiral tube through heat transfer. The heated water flows into the interior of each group of heat dissipation pipes through the cooperation of the drainage pipe and the water pump, thereby preheating the new tea leaves to be baked in the tea preheating placement plate, reducing the early heating time of the tea leaves. The hot air discharged from the air outlet pipe is cooled by heat transfer, thereby realizing energy utilization. 2. The hot air discharged from the inside of the air outlet pipe can be discharged into the pool through the exhaust pipe to heat the water in the pool, which is convenient for daily use. At the same time, when the hot air is discharged through the exhaust pipe, it is transferred to the air inside the second spiral pipe through heat transfer, heating the air inside the second spiral pipe. The heated air is discharged into the ventilation hole through the cooperation of the air outlet pipe and the connecting cover. The ventilation hole then heats the vortex heat dissipation pipe through the exhaust pipe. After the vortex heat dissipation pipe is heated, it can transfer the heat to the tea leaves on the tea tray, heating the tea leaves at the bottom of the tea tray, thereby preventing the tea leaves on the tea tray from being heated unevenly. 3. After the hot air bakes the tea leaves, it is discharged through the air outlet pipe and the exhaust pipe. When discharged, some fine leaf residue will be discharged together. The leaf residue filter plate inside the exhaust pipe can filter the leaf residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the back of the three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the interior of the air outlet pipe structure of the present invention; Figure 4 for Figure 3 A schematic diagram of the structure at center A; Figure 5 This is a schematic diagram of the interior of the first spiral tube structure of the present invention; Figure 6 This is a cross-sectional schematic diagram of the tea tray, rotating shaft, and connecting cover structure of the present invention; Figure 7 This is a schematic diagram of the connection between the exhaust pipe and the first connecting plate structure of the present invention; Figure 8 This is a schematic diagram of the interior of the exhaust duct structure of the present invention; Figure 9 for Figure 8 A magnified schematic diagram of the structure at point B in the middle; Figure 10 This is a schematic diagram of the connection between the exhaust pipe and the leaf residue filter plate structure of the present invention; Figure 11 It is a cross-sectional schematic diagram of the connection between the exhaust pipe and the leaf residue filter plate structure of the present invention; Figure 12 for Figure 11 Enlarged schematic diagram of the structure at point C in the middle.

[0016] In the figure: baking box 1, hot air blower 2, motor 3, rotating shaft 4, air outlet pipe 5, water inlet pipe 6, drain pipe 7, exhaust pipe 8, air pump 9, air outlet pipe 10, air inlet pipe 11, filter 12, tea placement tray 13, water pump 14, tea preheating placement plate 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, transmission shaft 28, blade 29, arc groove 30, leaf residue filter plate 31, second connecting plate 32, first receiving groove 33, cleaning plate 34, first return spring 35, collecting chamber 36, shield plate 37, second receiving groove 38, second return spring 39, through hole 41, third receiving groove 42, third return spring 43, supporting block 44, chamfered surface 45. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples. Example 1:

[0018] See also Figures 1 to 12 The present invention provides a technical solution: a multi-stage temperature control recovery device for waste heat of a tea roasting machine, comprising: A baking oven 1, wherein a rotating shaft 4 is provided inside the baking oven 1, and a plurality of tea trays 13 are mounted on the rotating shaft 4. A hot air blower 2 is mounted at positions corresponding to the plurality of tea trays 13; An air outlet duct 5 is provided at 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 ends of the water inlet pipe 6 and the drain pipe 7 away from the first spiral tube 17 are connected to a preheating assembly. 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 tea leaves on the tea tray 13 are roasted by the hot air blower 2. During the roasting process, the rotating shaft 4 drives the multiple tea trays 13 to rotate, so that the tea leaves are roasted more evenly. During the baking process, the hot air is discharged through the air outlet pipe 5. When discharged, the water inside the first spiral tube 17 is heated by heat transfer. The heated water heats the new tea leaves on the preheating assembly, thereby realizing energy utilization. After the hot air bakes the tea leaves, it is discharged through the air outlet pipe 5 and the exhaust pipe 8. When discharged, some fine leaf residues will be discharged together. The setting of the leaf residue filter plate 31 inside the exhaust pipe 8 can filter the leaf residue. During the filtering process, the cleaning component can clean the leaf residue filtered out by the leaf residue filter plate 31 to prevent the leaf residue from clogging the filter holes on the leaf residue filter plate 31. Example 2:

[0019] like Figure 1-Figure 2 As shown, the structure of the multi-stage temperature control recovery device for waste heat of a tea roasting machine disclosed in the second embodiment of the present invention is basically the same as that in the first embodiment, except that: A motor 3 is provided at the bottom end 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. The multiple sets of tea trays 13 rotate inside the baking box 1 through the cooperation of the motor 3 and the rotating shaft 4. There are two groups of hot air blowers 2, which are respectively arranged on both sides of the outside of the baking box 1, and the output ports of the two groups of hot air blowers 2 are connected to the inside of the baking box 1; Filters 12 are installed on the inner wall of the baking box 1 at positions corresponding to the output ports of the two groups of hot air blowers 2; The tea leaves on the tea tray 13 are roasted by the hot air blower 2. During the roasting process, the rotating shaft 4 drives the multiple tea trays 13 to rotate, so that the tea leaves are roasted more evenly. The filter 12 can filter the hot air discharged by the hot air blower 2 to prevent the entry of external impurities. The filter 12 is detachable for easy cleaning. Example 3:

[0020] like Figure 2-Figure 5 As shown, the structure of the multi-stage temperature control recovery device for waste heat of a tea roasting machine disclosed in the third embodiment of the present invention is basically the same as that in the second embodiment, except that: The preheating assembly includes a tea preheating plate 15 mounted on the side wall of the baking box 1, and a plurality of heat dissipation pipes 16 are arranged inside the tea preheating plate 15, and each heat dissipation pipe 16 is connected through the tea preheating plate 15; The end of one group of the heat dissipation pipes 16 is connected to the end of the water inlet pipe 6 away from the first spiral tube 17; One 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 group of the heat dissipation pipes 16; An adapted spiral guide plate 18 is provided inside the first spiral tube 17; During the roasting process, the hot air is discharged through the air outlet pipe 5. When discharged, the water inside the first spiral tube 17 is heated by heat transfer. The heated water flows into the interior of each group of heat dissipation pipes 16 through the cooperation of the drainage pipe 7 and the water pump 14, thereby preheating the new tea leaves to be roasted in the tea preheating placement plate 15, reducing the early heating time of the tea leaves. The hot air discharged from the air outlet pipe 5 is reduced in temperature through heat transfer, thereby realizing energy utilization. The provision of the spiral guide plate 18 causes the water flow to rise in a vortex shape, thereby enhancing disturbance and improving heat exchange efficiency. Example 4:

[0021] like Figures 1-8 As shown, the structure of the multi-stage temperature control recovery device for waste heat of a tea roasting machine disclosed in the fourth embodiment of the present invention is basically the same as that of the third embodiment, except that: The upper end of the air outlet pipe 5 is connected to an exhaust pipe 8, and the exhaust pipe 8 is a "Z"-shaped structure; A second spiral tube 27 is provided inside the middle section of the exhaust tube 8. The two ends of the second spiral tube 27 are respectively connected to the air outlet pipe 10 and the air inlet pipe 11. The end of the air inlet pipe 11 away from the second spiral tube 27 is connected to the blower pump 9. A connecting cover 20 is rotatably sleeved on the top end of the rotating shaft 4. A countersunk hole 21 is formed at the lower end of the connecting cover 20. 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. A ventilation hole 19 is formed at the upper end of the rotating shaft 4, 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; A vortex heat dissipation pipe 23 is provided on the upper end surface of each tea tray 13 . An exhaust duct 24 is provided at the end of each tea tray 13 corresponding to the end of the vortex heat dissipation pipe 23 . The vortex heat dissipation pipe 23 is connected to the ventilation hole 19 through the exhaust duct 24 . One end of the vortex heat dissipation pipe 23 away from the exhaust pipe 24 is in communication with the interior of the baking box 1; The hot air discharged from the inside of the air outlet pipe 5 can be discharged into the pool through the exhaust pipe 8, heating the water in the pool and making it convenient for daily use. At the same time, when the hot air is discharged through the exhaust pipe 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 to the inside of the ventilation hole 19 through the cooperation of the air outlet pipe 10 and the connecting cover 20. The ventilation hole 19 then heats the vortex heat dissipation pipe 23 through the exhaust pipe 24. After the vortex heat dissipation pipe 23 is heated, the heat can be transferred 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 the tea leaves on the tea placing tray 13 from being heated unevenly. Embodiment 5:

[0022] like Figure 9 As shown, the structure of the multi-stage temperature control recovery device for waste heat of a tea roasting machine disclosed in the fifth embodiment of the present invention is basically the same as that of the fourth embodiment, except that: An arc-shaped groove 30 is formed at the middle end of the exhaust pipe 8, 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. The connection between the first connecting plate 25 and the fixing plate 26 is screwed with a fixing bolt; The cleaning assembly includes a transmission shaft 28 disposed above the leaf residue filter plate 31, and a fixing bracket is installed inside the exhaust pipe 8 at a position corresponding to the transmission shaft 28. The transmission shaft 28 is rotatably disposed above the leaf residue filter plate 31 via the fixing bracket. The upper end of the transmission shaft 28 is provided with a plurality of blades 29, and the lower end of the transmission shaft 28 is provided with a plurality of second connecting plates 32. The lower end of each second connecting plate 32 is provided with a first receiving groove 33. A cleaning plate 34 is provided inside each first receiving groove 33, and a first return spring 35 is provided between the upper end of each cleaning plate 34 and the inner top end of the corresponding first receiving groove 33. Each cleaning plate 34 is in elastic contact with the upper end surface of the leaf residue filtering plate 31 through the cooperation of the corresponding plurality of first return springs 35; After the hot air has roasted the tea leaves, it is discharged through the air outlet pipe 5 and the exhaust pipe 8. When discharged, some fine leaf residues will be discharged together. The leaf residue filter plate 31 inside the exhaust pipe 8 can filter the leaf residues. At the same time, when the hot air flows, it will drive the transmission shaft 28 to rotate through the blades 29, and then drive the second connecting plate 32 above the leaf residue filter plate 31 to rotate. When the second connecting plate 32 rotates, the elastically arranged cleaning plate 34 cleans the leaf residue filtered out by the leaf residue filter plate 31 to prevent the leaf residue from clogging the filter holes on the leaf residue filter plate 31. Example 6:

[0023] like Figure 10-12 As shown, the structure of the multi-stage temperature control recovery device for waste heat of a tea roasting machine disclosed in the sixth embodiment of the present invention is basically the same as that in the fifth embodiment, except that: The upper end surface of the leaf residue filter plate 31 is provided with at least one set of collecting chambers 36. The top end of the inner side wall of the collecting chamber 36 is provided with a second receiving groove 38. The opening direction of the second receiving groove 38 is adapted to the rotation direction of the second connecting plate 32. A shield plate 37 is provided inside the second receiving groove 38, and a plurality of groups of second return springs 39 are provided between the end of the shield plate 37 and the inner wall of the second receiving groove 38; A third receiving groove 42 is defined at the upper end of the shield plate 37 away from the second return spring 39. A supporting block 44 is inserted into the interior of the third receiving groove 42. A third return spring 43 is provided between the lower end of the supporting block 44 and the bottom end of the third receiving groove 42. The supporting block 44 is elastically connected to the shield plate 37 via the third return spring 43. A chamfered surface 45 is defined on the side wall of the supporting block 44 facing the rotation direction of the second connecting plate 32. The elastic force of the second return spring 39 is smaller than the elastic force of the third return spring 43; The bottom of the collecting chamber 36 is provided with a plurality of through holes 41 , and the through holes 41 pass through the bottom of the leaf residue filter plate 31 ; When the cleaning plate 34 is cleaning leaf residue, the leaf residue accumulates on one side of the cleaning plate 34. When the cleaning plate 34 rotates, it will touch the abutment block 44, and then push the baffle 37 by pushing the abutment block 44. When the baffle 37 moves, the upper port of the collection chamber 36 is opened. At this time, the cleaned leaf residue falls into the collection chamber 36 driven by the hot air, and the hot air is discharged through the through hole 41. The leaf residue is concentrated inside the collection chamber 36. When the baffle 37 is pushed to the end position, the elastically arranged abutment block 44 is abutted downward by the cleaning plate 34 under the action of the bevel surface 45. When the abutment block 44 is staggered with the cleaning plate 34, the baffle 37 is reset under the action of the second reset spring 39, completing the sealing of the collection chamber 36.

[0024] The present solution is as follows: tea leaves to be roasted are placed on the tea placing tray 13, and then the door of the roasting box 1 is closed. After closing, the hot air blower 2 and the motor 3 are started, and the tea leaves on the tea placing tray 13 are roasted by the hot air blower 2. During the roasting process, the rotating shaft 4 drives the multiple sets of tea placing trays 13 to rotate, so that the tea leaves are roasted more evenly. During the roasting process, the next set of tea leaves to be roasted can be placed on the tea preheating placing plate 15; During the roasting process, the hot air is discharged through the air outlet pipe 5. When discharged, the water inside the first spiral tube 17 is heated by heat transfer. The heated water flows into the interior of each group of heat dissipation pipes 16 through the cooperation of the drainage pipe 7 and the water pump 14, thereby preheating the new tea leaves to be roasted in the tea preheating placement plate 15, thereby reducing the heating time of the tea leaves in the early stage of roasting. The hot air exhausted from the inside of the air outlet pipe 5 can be discharged into the pool through the exhaust pipe 8, heating the water in the pool and making it convenient for daily use. At the same time, when the hot air is discharged through the exhaust pipe 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 inside of the ventilation hole 19 through the cooperation of the air outlet pipe 10 and the connecting cover 20. The ventilation hole 19 then heats the vortex heat dissipation pipe 23 through the exhaust pipe 24. After the vortex heat dissipation pipe 23 is heated, it can transfer the heat to the tea leaves on the tea placing tray 13, heating the tea leaves at the bottom of the tea placing tray 13, thereby preventing the tea leaves on the tea placing tray 13 from being heated unevenly. After the hot air has roasted the tea leaves, it is discharged through the air outlet pipe 5 and the exhaust pipe 8. When discharged, some fine leaf residues will be discharged together. The leaf residue filter plate 31 inside the exhaust pipe 8 can filter the leaf residues. At the same time, when the hot air flows, it drives the transmission shaft 28 to rotate through the blades 29, and then drives the second connecting plate 32 above the leaf residue filter plate 31 to rotate. When the second connecting plate 32 rotates, the elastically arranged cleaning plate 34 cleans the leaf residue filtered out by the leaf residue filter plate 31 to prevent the leaf residue from clogging the filter holes on the leaf residue filter plate 31. When the cleaning plate 34 cleans the leaf residue, the leaf residue accumulates on one side of the cleaning plate 34. When the cleaning plate 34 rotates, it touches the abutting block 44, and then pushes the abutting block 44 to push the shield plate 37, and the shield plate 37 is pushed. When the shutter 37 moves, the upper port of the collecting chamber 36 is opened, and the cleaned leaf residue falls into the collecting chamber 36. When the shield plate 37 is pushed to the end position, the elastically arranged supporting block 44 is supported downward by the cleaning plate 34 under the action of the bevel 45. When the supporting block 44 is offset from the cleaning plate 34, the shutter 37 is reset under the action of the second reset spring 39, completing the sealing of the collecting chamber 36. When the leaf residue inside the collecting chamber 36 needs to be cleaned, the leaf residue filter plate 31 can be removed from the exhaust pipe 8 by disassembling the first connecting plate 25.

[0025] The present 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 the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-stage temperature control recovery device for waste heat from a tea roasting machine, characterized in that: include: A baking box (1), wherein a rotating shaft (4) is provided inside the baking box (1), a plurality of tea trays (13) arranged at intervals are mounted on the rotating shaft (4), and a hot air blower (2) is mounted in the baking box (1) at positions corresponding to the plurality of tea trays (13); An air outlet pipe (5) is arranged in communication with the top of the baking oven (1), and a first spiral pipe (17) is arranged inside the air outlet pipe (5), and the two ends of the first spiral pipe (17) are respectively connected to a water inlet pipe (6) and a drain pipe (7), and the ends of the water inlet pipe (6) and the drain pipe (7) away from the first spiral pipe (17) are connected to a preheating assembly; 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).

2. The multi-stage temperature control recovery device for waste heat from a tea roasting machine according to claim 1, characterized in that: A motor (3) is provided at the bottom end of the baking box (1), and an 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). The plurality of 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 recovery device for waste heat from a tea roasting machine according to claim 1, characterized in that: Two groups of hot air blowers (2) are provided, and the two groups of hot air blowers (2) are respectively provided on both sides of the outside of the baking box (1), and the output ports of the two groups of hot air blowers (2) are both connected to the inside of the baking box (1); Filters (12) are installed on the inner wall of the baking box (1) at positions corresponding to the output ports of the two groups of hot air blowers (2).

4. The multi-stage temperature control recovery device for waste heat from a tea roasting machine according to claim 1, characterized in that: The preheating assembly comprises a tea preheating placement plate (15) mounted on a side wall of the baking box (1), wherein a plurality of groups of heat dissipation pipes (16) are arranged inside the tea preheating placement plate (15), and each of the heat dissipation pipes (16) is connected through the tea preheating placement plate (15); The end of one group of the heat dissipation pipes (16) is connected to an end of the water inlet pipe (6) away from the first spiral tube (17); One end of the drainage 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 group of the heat dissipation pipes (16).

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

6. The multi-stage temperature control recovery device for waste heat from a tea roasting machine according to claim 1, characterized in that: The upper end of the air outlet pipe (5) is connected to an exhaust pipe (8), and the exhaust pipe (8) has a "Z"-shaped structure; A second spiral tube (27) is provided inside the middle section of the exhaust tube (8), and both ends of the second spiral tube (27) are respectively connected to an air outlet tube (10) and an air inlet tube (11), and an end of the air inlet tube (11) away from the second spiral tube (27) is connected to a blower pump (9); A connecting cover (20) is rotatably sleeved on the top end of the rotating shaft (4), a countersunk hole (21) is provided at the lower end of the connecting cover (20), and an end of the air outlet pipe (10) away from the second spiral pipe (27) passes through the connecting cover (20) and is communicated with the countersunk hole (21).

7. The multi-stage temperature control recovery device for waste heat from a tea roasting machine according to claim 6, characterized in that: A ventilation hole (19) is provided at the upper end of the rotating shaft (4), 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); The upper end surface of each tea placement tray (13) is provided with a vortex heat dissipation tube (23), and an exhaust duct (24) is provided inside the tea placement tray (13) at a position corresponding to the end of the vortex heat dissipation tube (23), and the vortex heat dissipation tube (23) is communicated with the ventilation hole (19) through the exhaust duct (24); One end of the vortex heat dissipation pipe (23) away from the exhaust pipe (24) is in communication with the interior of the baking box (1).

8. The multi-stage temperature control recovery device for waste heat from a tea roasting machine according to claim 6, characterized in that: 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); 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), and a fixing bolt is screwed at the connection between the first connecting plate (25) and the fixing plate (26).

9. The multi-stage temperature control recovery device for waste heat from a tea roasting machine according to claim 8, characterized in that: The cleaning assembly comprises a transmission shaft (28) arranged above the leaf residue filter plate (31); a fixing frame is installed inside the exhaust pipe (8) at a position corresponding to the transmission shaft (28); the transmission shaft (28) is rotatably arranged above the leaf residue filter plate (31) via the fixing frame; The upper end of the transmission shaft (28) is provided with a plurality of blades (29), the lower end of the transmission shaft (28) is provided with a plurality of second connecting plates (32), the lower end of each second connecting plate (32) is provided with a first receiving groove (33), the interior of each first receiving groove (33) is provided with a cleaning plate (34), and a first return spring (35) is provided between the upper end of each cleaning plate (34) and the inner top end of the corresponding first receiving groove (33); Each cleaning plate (34) is in elastic contact with the upper end surface of the leaf residue filtering plate (31) through the cooperation of a corresponding plurality of groups of the first return springs (35).

10. The multi-stage temperature control recovery device for waste heat from a tea roasting machine according to claim 9, characterized in that: The upper end surface of the leaf residue filter plate (31) is provided with at least one group of collecting chambers (36), and the top end of the inner side wall of the collecting chamber (36) is provided with a second receiving groove (38) correspondingly, and the opening direction of the second receiving groove (38) is adapted to the rotation direction of the second connecting plate (32); A shield plate (37) is provided inside the second receiving groove (38), and a plurality of groups of second return springs (39) are provided between the end of the shield plate (37) and the inner wall of the second receiving groove (38); A third receiving groove (42) is provided at the upper end of one end of the shielding plate (37) away from the second return spring (39), a supporting block (44) is inserted into the interior of the third receiving groove (42), and a third return spring (43) is provided between the lower end of the supporting block (44) and the bottom end of the third receiving groove (42), the supporting block (44) is elastically connected to the shielding plate (37) through the third return spring (43), and a chamfered surface (45) is provided on a side wall of the supporting block (44) facing the rotation direction of the second connecting plate (32); The elastic force of the second return spring (39) is smaller than the elastic force of the third return spring (43); A plurality of through holes (41) are provided at the bottom end of the collecting chamber (36), and the through holes (41) pass through the bottom of the leaf residue filter plate (31).

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