Bread fermentation box double-circulation humidity automatic adjusting device and operation method thereof

Abstract

The invention relates to the field of bread making, in particular to a double-circulation humidity automatic adjusting device of a bread fermentation box and an operation method of the double-circulation humidity automatic adjusting device. The transmission mechanism comprises a sleeve, a transmission piece, a rotating disc and a lifting piece. The sleeve and the lifting piece can be driven to rotate relative to the box body through coaxial rotation of the transmission piece and the rotating disc, and therefore the rotating shaft is driven to finish two times of lifting in the process of intermittently rotating forwards and backwards by 180 degrees. Therefore, the rotating shaft is driven to rotate and ascend and descend relative to the box body, airflow is formed, and wet and hot air in the containing space is promoted to flow and circulate. Meanwhile, the rotating shaft synchronously drives the dough to rotate and lift, so that the dough can be in full contact with hot and humid air flowing in the accommodating space, uniform heating of the dough is promoted, yeast activity is enhanced, and the dough is better fermented. In addition, when hot and humid air is supplemented through the rotating shaft, the rotating shaft which rotates and ascends and descends enables the hot and humid air to fully flow and circulate.

Description

Technical Field

[0001] The present invention relates to the field of bread making, in particular to a double-circulation automatic humidity regulating device for a bread fermentation box and an operating method thereof. Background Art

[0002] Bread fermentation is a critical step in the breadmaking process. Controlling the temperature and humidity of the fermentation chamber directly impacts the dough's expansion, yeast activity, and the final product's texture. Currently, bread fermentation chambers on the market primarily utilize static humidity control, relying on natural convection or forced ventilation with a single fan. This results in uneven distribution of hot and humid air, leading to inconsistent dough fermentation levels at different locations within the chamber. Summary of the Invention

[0003] In view of the deficiencies in the above background technology, the present invention provides a double-circulation automatic humidity regulating device for a bread fermentation box.

[0004] The present invention adopts the following technical solutions: A double-circulation automatic humidity adjustment device for a bread fermentation box and an operating method thereof, the device comprising: A box body, wherein the bottom surface of the accommodating space of the box body has a through hole, and the bottom surface of the box body is fixed with a shaft sleeve at a position corresponding to the through hole; A placement rack, comprising a rotating shaft, a placement plate, and a movable plate. A plurality of placement plates are fixedly sleeved on the outer side of the rotating shaft. The movable plate is detachably mounted on the placement plate. Both the movable plate and the placement plate are hollowed out. The movable plate is used to place dough to be fermented. The rotating shaft is hollow inside and has a plurality of ventilation holes on its surface. A transmission mechanism, comprising: A sleeve, the sleeve is sleeved outside the shaft sleeve and rotates axially fixedly relative to the shaft sleeve, and the rotating shaft is movable up and down fixedly radially relative to the sleeve; A transmission member, comprising a drive shaft and a drive rod, wherein the middle of the drive rod is fixed to one end of the drive shaft, and the drive shaft is restricted from rotating below the box; a turntable, the turntable being coaxially arranged with the drive shaft; A lifting member, comprising a No. 1 arm, a guide shaft, a limit shaft, and a No. 2 arm. The No. 1 arm is provided with a guide shaft and a limit shaft at both ends, the limit shaft being restricted from rotating below the box body. The No. 2 arm is provided at the other end of the limit shaft. The rotating shaft passes through the sleeve and is connected to the No. 2 arm and is rotatable relative to the No. 2 arm. One side of the outer ring surface of the sleeve is inwardly recessed to form two spiral grooves, which are arranged in a mirror-image manner. The drive shaft rotates until the two ends of the drive rod are respectively embedded in the two spiral grooves, driving the sleeve to rotate 180° forward and 180° reverse. The turntable has a closed guide slot, the guide shaft is embedded in the guide slot, and when the turntable is rotated, the guide slot pushes the guide shaft, causing the lifting member to rotate around the limiting shaft and drive the rotating shaft to move up and down.

[0005] As a further improvement, the movable disk is a semicircular structure, and the outer ring surface of the placement disk is provided with a first fence that protrudes upward, and the two assembled movable disks are placed in the first fence with a gap fit.

[0006] As a further improvement, the outer ring surface of the movable disk is provided with a second fence protruding upward, and the side of the second fence is provided with a handle. When the movable disk is placed on the placement disk, the handle is higher than the first fence.

[0007] As a further improvement, a raised limiting strip is provided on the outer side of the rotating shaft, and a recessed limiting groove is provided on the inner side of the sleeve. The limiting strip is loosely fitted in the limiting groove, so that the rotating shaft is radially fixed relative to the sleeve.

[0008] As a further improvement, the rotating shaft passes through the sleeve to connect the bottom rod, the outer ring surface of the bottom rod is provided with an inwardly recessed annular groove, and the No. 2 arm is provided with a connecting shaft, which is placed horizontally in the annular groove so that the No. 2 arm can rotate relative to the No. 2 arm.

[0009] As a further improvement, the transmission member also includes a connecting rod and an arc-shaped plate, the connecting rod and the driving rod are fixed perpendicularly to each other at one end of the driving shaft, and the driving shaft is located at the intersection of the connecting rod and the driving rod; the arc-shaped plate is fixed at both ends of the connecting rod, and both ends of the sleeve extend outward to form a positioning part, and positioning grooves are provided on both sides corresponding to the positioning part, and the positioning grooves on both sides of the same positioning part are respectively connected to the same end of the two spiral grooves; when the driving rod rotates to leave the spiral groove, the arc-shaped plate rotates accordingly to pass through the positioning groove.

[0010] As a further improvement, the transmission mechanism further includes a drive motor, which drives the drive shaft to rotate.

[0011] An operating method of a double-circulation automatic humidity regulating device for a bread fermentation box is characterized by following the steps: Place the dough to be fermented on a movable tray, and then place the movable tray on a rack; The drive shaft is rotated so that the end of the drive rod penetrates into the forward spiral groove, thereby driving the sleeve to rotate 180 degrees in the forward direction. The sleeve synchronously drives the rotating shaft to rotate, thereby driving the placement plate, the movable plate and the dough to rotate accordingly. At the same time, the drive shaft synchronously drives the rotating plate to rotate, and the guide groove pushes the guide shaft, causing the No. 2 arm to rotate around the limit shaft and drive the rotating shaft to rise and fall, thereby causing the placement plate, the movable plate and the dough to rise and fall accordingly. After the driving shaft rotates until the end of the driving rod leaves the positive spiral groove, the sleeve loses drive and stops rotating, but the driving shaft still drives the turntable to rotate, pushing the rotating shaft up and down, thereby causing the placement plate, the movable plate and the dough to rise and fall accordingly; The drive shaft rotates until the end of the drive rod penetrates the reverse spiral groove, thereby driving the sleeve to rotate 180 degrees in the opposite direction. The sleeve synchronously drives the rotating shaft to rotate, thereby driving the placement plate, the movable plate and the dough to rotate accordingly. At the same time, the drive shaft continues to synchronously drive the rotation of the rotating plate, pushing the rotating shaft to rise and fall, thereby causing the placement plate, the movable plate and the dough to rise and fall accordingly. After the driving shaft rotates until the end of the driving rod leaves the reverse spiral groove, the sleeve loses drive again and stops rotating, and the driving shaft still drives the turntable to rotate, pushing the rotating shaft to rise and fall, thereby causing the placement plate, the movable plate and the dough to rise and fall accordingly; When the humidity in the accommodating space of the box is less than 70%, hot and humid air is introduced into the rotating shaft and flows into the accommodating space through the vent holes for humidification.

[0012] As can be seen from the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: the transmission mechanism includes a sleeve, a transmission member, a turntable, and a lifting member. The present invention drives the sleeve and the lifting member to rotate relative to the housing through the coaxial rotation of the transmission member and the turntable, thereby achieving two lifts and lowerings during the intermittent forward and reverse rotation of the rotating shaft by 180°. Thus, the present invention generates airflow by driving the rotating shaft to rotate and lift relative to the housing, promoting the flow and circulation of the hot and humid air within the accommodating space. Simultaneously, the rotating shaft synchronously drives the dough to rotate and lift, allowing the dough to fully contact the hot and humid air flowing within the accommodating space, promoting uniform heating of the dough and enhancing yeast activity, thereby enabling better fermentation of the dough. Furthermore, when the hot and humid air is replenished by the rotating shaft, the rotating and lifting shaft allows the hot and humid air to fully flow and circulate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the planar structure of the placement rack and transmission mechanism.

[0015] Figure 3 It is a schematic diagram of the three-dimensional structure of the placement rack.

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of the transmission mechanism.

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the sleeve and the transmission part.

[0018] Figure 6 It is a schematic diagram of the three-dimensional structure of the rotating shaft, turntable and lifting parts. DETAILED DESCRIPTION

[0019] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] As attached Figure 1 and Figure 2 The device, shown in Figure 1, features a dual-circuit automatic humidity control system for a bread proofing chamber. The device comprises a chamber 1, a rack 2, and a transmission mechanism 3. A humidity sensor is mounted on the inner wall of chamber 1's accommodating space 11. When the humidity sensor detects a humidity level below 70% within chamber 11, it activates a PTC ceramic heater for humidification. When the humidity exceeds 85%, it activates a dehumidifier or ventilation fan. Both the PTC ceramic heater and the dehumidifier or ventilation fan are located within chamber 1 and are wired to a controller (PLC / ESP32 + relay) located within the top of chamber 1. The controller controls their start and stop. A hinged door is attached to chamber 1 for opening and closing chamber 11.

[0021] As attached Figures 1 to 3 As shown, a storage rack 2 is provided within the storage space 11 of the housing 1. The storage rack 2 comprises a rotating shaft 21, a storage tray 22, and a movable tray 23. Several storage trays 22 are fixedly sleeved on the outer side of the rotating shaft 21. The movable trays 23 are detachably mounted on the storage trays 22 and are used to place the dough 4 to be fermented. Furthermore, the rotating shaft 21 is hollow and has a plurality of ventilation holes 212 formed on its surface. After moist and hot air is introduced into the rotating shaft 21, it flows through the ventilation holes 212 into the storage space 11 for humidification. Specifically, an air duct can be connected to the top of the rotating shaft 21 via an adapter. Steam rapidly generated by a PTC ceramic heater (500W) within the top of the housing 1 is passed through the air duct into the rotating shaft 21. A transmission mechanism 3 is provided below the housing 1 to drive the rotating shaft 21 to rotate and raise and lower relative to the housing 1, thereby allowing the moist and hot air flowing out of the rotating shaft 21 to flow and circulate. At the same time, the rotating shaft 21 can also drive the dough 4 in the movable plate 23 on the placement plate 22 to rotate and rise and fall, so that the dough 4 is fully in contact with the hot and humid air, promoting uniform heating of the dough 4 and enhancing yeast activity, so that the dough 4 can ferment better.

[0022] Furthermore, both the movable plate 23 and the placement plate 22 are hollowed out to reduce weight and the burden on the rotating shaft 21, allowing for smoother rotation and lifting of the rotating shaft 21. Furthermore, a third bearing 24 can be provided at the top of the rotating shaft 21. The third bearing 24 is mounted on the top of the accommodating space 11. Specifically, a clearance hole is provided at the top of the accommodating space 11. The outer ring of the third bearing 24 is fixed within the clearance hole. The rotating shaft 21 is movable through the inner ring of the third bearing 24 and then enters the clearance hole. The inner ring and the rotating shaft 21 form a clearance fit. This third bearing 24 provides auxiliary support for the rotating shaft 21, preventing it from tilting and enabling smoother rotation and lifting of the rotating shaft 21.

[0023] Preferably, as shown in the attached Figure 1 and Figure 2 As shown, a protective cover 13 is fixed under the box body 1, and the protective cover 13 is used to cover the transmission mechanism 3 to form a protective effect and support the entire device.

[0024] As attached Figure 2 As shown, the bottom surface of the accommodating space 11 has a through hole, and the bottom surface of the box body 1 is fixed with a sleeve 12 at a position corresponding to the through hole. Specifically, the sleeve 12 is a tubular structure that passes through from top to bottom, and a flange is provided at one end of the sleeve 12. The flange is connected to the bottom surface of the box body 1, so that the sleeve 12 can be fixed to the bottom of the box body 1.

[0025] As attached Figure 3 As shown, the movable tray 23 is a semicircular structure. The outer surface of the placement tray 22 is provided with an upwardly protruding first fence 222. The two assembled movable trays 23 fit neatly within the first fence 222. The movable tray 23 is provided to facilitate removing or placing the dough 4 on the placement tray 22. The first fence 222 prevents the movable tray 23 from being separated from the placement tray 22 due to centrifugal force when the rotation shaft 21 rotates the placement tray 22.

[0026] Furthermore, the outer surface of the movable tray 23 is provided with an upwardly protruding second fence 232, and a handle 233 is provided on the side of the second fence 232. This handle 233 facilitates lifting and carrying the movable tray 23, making it easier to remove and place the dough 4. When the movable tray 23 is placed on the placement tray 22, the handle 233 is higher than the first fence 222, ensuring that employees can accurately grasp the handle 233. A square stopper 221 is provided at the center of the placement tray 22, and the movable tray 23 has a notch 231 that matches the stopper 221. The square stopper 221 restricts the notch 231, preventing the movable tray 23 from rotating and colliding during the rotation of the placement tray 22 driven by the rotating shaft 21.

[0027] As attached Figure 4 and Figure 5As shown, the transmission mechanism 3 includes a sleeve 31, a transmission member 32, a turntable 33 and a lifting member 34. The sleeve 31 is sleeved on the outside of the sleeve 12 and rotates axially fixedly relative to the sleeve 12. Preferably, the sleeve 31 is connected to the sleeve 12 through a first bearing 315. Specifically, the upper end of the sleeve 31 is inserted into the inner ring of the first bearing 315 with an interference fit, and the sleeve 31 is equipped with a retaining spring on the upper surface of the inner ring of the first bearing 315, so that the sleeve 31 is fixed relative to the inner ring of the first bearing 315, and the sleeve 12 is fixedly sleeved on the outer ring of the first bearing 315. As a result, the sleeve 31 is fixed axially relative to the sleeve 12 and cannot slide vertically, and the connection of the first bearing 315 can reduce the friction of the sleeve 31 rotating relative to the sleeve 12, so that the device can run more smoothly.

[0028] As attached Figure 5 As shown, the transmission member 32 includes a drive shaft 321, a drive rod 322, and a drive motor 35. The middle of the drive rod 322 is fixed to one end of the drive shaft 321. The drive shaft 321 is restricted from rotating below the housing 1. Specifically, the drive shaft 321 is driven by the drive motor 35 located within the protective cover 13. One side of the outer annular surface of the sleeve 31 is recessed inward to form two spiral grooves 311. The two spiral grooves 311 are arranged in a mirrored and cross-shaped manner, that is, one spiral groove 311 is a forward spiral and the other is a reverse spiral. In this embodiment, the spiral grooves 311 only intercept half of the spiral line. When the drive shaft 321 rotates until the two ends of the drive rod 322 are respectively embedded in the two spiral grooves 311, the drive rod 322 pushes the spiral grooves 311, causing the sleeve 31 to rotate 180° forward and 180° reverse. Preferably, a second bearing 323 may be provided at the end of the driving rod 322. The second bearing 323 may penetrate into the spiral groove 312 to reduce friction between the driving rod 322 and the side wall of the spiral groove 311, thereby making the device of the present invention run more smoothly.

[0029] Furthermore, the transmission member 32 also includes a connecting rod 324 and a curved plate 325. The connecting rod 324 and the drive rod 322 are fixed perpendicularly to one end of the drive shaft 321, with the drive shaft 321 located at the intersection of the connecting rod 324 and the drive rod 322. The curved plate 325 is fixed to both ends of the connecting rod 324. Both ends of the sleeve 31 extend outward to form a positioning portion 313. Positioning grooves 312 are provided on both sides of the positioning portion 313. The positioning grooves 312 on both sides of the same positioning portion 313 are respectively connected to the same end of the two spiral grooves 311. When the drive rod 322 rotates to leave the spiral groove 311, the curved plate 325 rotates accordingly to pass through the positioning groove 312. After the arc plate 325 leaves the positioning groove 312, the other driving rod 322 rotates to penetrate into the spiral groove 311 from the lower end of the other spiral groove 311. During this process, the arc plate 325 can position the sleeve 31, so that the sleeve 31 remains in a stable state without rotating.

[0030] As attached Figure 3 and Figure 5 As shown, the rotating shaft 21 is fixed radially relative to the sleeve 31 and can be raised and lowered. Preferably, a raised limiting strip 211 is provided on the outside of the rotating shaft 21, and a recessed limiting groove 314 is provided on the inside of the sleeve 31. The limiting strip 211 is loosely fitted into the limiting groove 314, thereby fixing the rotating shaft 21 radially relative to the sleeve 31. That is, when the sleeve 31 rotates, the rotating shaft 21 is driven to rotate, thereby causing the placement plate 22, the movable plate 23, and the dough 4 on the rotating shaft 21 to rotate accordingly.

[0031] As attached Figure 5 and Figure 6 As shown, the turntable 33 is coaxially arranged with the drive shaft 321. The turntable 33 is connected to the rotating shaft 21 via a lifting member 34, which causes the rotating shaft 21 to rise and fall. The lifting member 34 includes a first arm 341, a guide shaft 342, a limit shaft 343, and a second arm 344. The guide shaft 342 and the limit shaft 343 are respectively provided at both ends of the first arm 341. The turntable 33 has a closed guide slot 331, and the guide shaft 342 is inserted into the guide slot 331. A second arm 344 is provided at the other end of the limiting shaft 343. The rotating shaft 21 passes through the sleeve 31 and is connected to the second arm 344, allowing rotation relative to the second arm 344. Specifically, the rotating shaft 21 passes through the sleeve 31 and is connected to the bottom rod 213. The outer annular surface of the bottom rod 213 is provided with an inwardly recessed annular groove 214. The second arm 344 is provided with a connecting shaft 345, which is laterally inserted into the annular groove 214, allowing rotation relative to the second arm 344. The limiting shaft 343 is restricted from rotating below the housing 1. Preferably, the limiting shaft 343 is mounted within the protective cover 13 below the housing 1 via a second sleeve 346, that is, the second sleeve 346 is sleeved outside the limiting shaft 343, and the limiting shaft 343 is axially fixed and rotates relative to the sleeve 12. When in use, the turntable 33 is rotated, and the guide groove 331 pushes the guide shaft 342, causing the second arm 344 and the connecting shaft 345 to rotate around the limit shaft 343. The connecting shaft 345 pushes the annular groove 214 to drive the rotating shaft 21 to rise and fall, promoting the flow and circulation of moist and hot air, which is beneficial to the fermentation of the dough 4.

[0032] In summary, the operation method of the device of the present invention can be as follows: Place the dough 4 to be fermented on the movable tray 23, and then place the movable tray 23 on the placement rack 2; The drive shaft 321 is rotated, causing the end of the drive rod 322 to penetrate into the forward spiral groove 311, thereby driving the sleeve 31 to rotate 180 degrees in the forward direction. The sleeve 31 simultaneously drives the rotating shaft 21 to rotate, thereby driving the placement plate 22, the movable plate 23, and the dough 4 to rotate accordingly. At the same time, the drive shaft 321 simultaneously drives the rotating plate 33 to rotate. The guide groove 331 pushes the guide shaft 342, causing the second arm 344 and the connecting shaft 345 to rotate around the limit shaft 343. The connecting shaft 345 pushes the annular groove 214 to drive the rotating shaft 21 to rise and fall, thereby causing the placement plate 22, the movable plate 23, and the dough 4 to rise and fall accordingly. After the driving shaft 321 rotates until the end of the driving rod 322 leaves the forward spiral groove 311, the sleeve 31 loses drive and stops rotating. The driving shaft 321 still drives the rotating disk 33 to rotate, pushing the rotating shaft 21 up and down, thereby causing the placement plate 22, the movable plate 23 and the dough 4 to rise and fall accordingly. The drive shaft 321 rotates until the end of the drive rod 322 passes into the reverse spiral groove 311, thereby driving the sleeve 31 to rotate 180 degrees in the reverse direction. The sleeve 31 simultaneously drives the rotating shaft 21 to rotate, thereby driving the placement plate 22, the movable plate 23 and the dough 4 to rotate accordingly. At the same time, the drive shaft 321 continues to synchronously drive the rotating plate 33 to rotate, pushing the rotating shaft 21 to rise and fall, thereby causing the placement plate 22, the movable plate 23 and the dough 4 to rise and fall accordingly. After the driving shaft 321 rotates until the end of the driving rod 322 leaves the reverse spiral groove 311, the sleeve 31 loses drive again and stops rotating. The driving shaft 321 still drives the rotating disk 33 to rotate, pushing the rotating shaft 21 up and down, thereby causing the placement plate 22, the movable plate 23 and the dough 4 to rise and fall accordingly. When the humidity in the accommodating space 11 of the housing 1 is less than 70%, hot and humid air is introduced into the rotating shaft 21 and flows into the accommodating space 11 through the vent holes 212 for humidification.

[0033] As can be seen from the above operating method, the present invention can drive the sleeve 31 and the lifting member 34 to rotate relative to the housing 1 through the coaxial rotation of the transmission member 32 and the turntable 33, thereby achieving two lifts and lowering of the rotating shaft 21 during the intermittent 180° forward and reverse rotation. It can be seen that the present invention generates airflow by driving the rotating shaft 21 to rotate and lift relative to the housing 1, promoting the flow and circulation of the hot and humid air within the accommodating space 11. At the same time, the rotating shaft 21 synchronously drives the dough to rotate and lift, allowing the dough 4 to fully contact the hot and humid air flowing within the accommodating space 11, promoting uniform heating of the dough 4 and enhancing yeast activity, thereby allowing the dough 4 to ferment better. In addition, when the hot and humid air is replenished by the rotating shaft 21, the rotating and lifting rotating shaft 21 can enable the hot and humid air to fully flow and circulate.

[0034] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed to infringe the technical field of the protection scope of the present invention.

Claims

1. A double-circulation automatic humidity adjustment device for a bread fermentation box, characterized in that: The device includes: A box body, wherein the bottom surface of the accommodating space of the box body has a through hole, and the bottom surface of the box body is fixed with a shaft sleeve at a position corresponding to the through hole; A placement rack, comprising a rotating shaft, a placement plate, and a movable plate. A plurality of placement plates are fixedly sleeved on the outer side of the rotating shaft. The movable plate is detachably mounted on the placement plate. Both the movable plate and the placement plate are hollowed out. The movable plate is used to place dough to be fermented. The rotating shaft is hollow inside and has a plurality of ventilation holes on its surface. A transmission mechanism, comprising: A sleeve, the sleeve is sleeved outside the shaft sleeve and rotates axially fixedly relative to the shaft sleeve, and the rotating shaft is movable up and down fixedly radially relative to the sleeve; A transmission member, comprising a drive shaft and a drive rod, wherein the middle of the drive rod is fixed to one end of the drive shaft, and the drive shaft is restricted from rotating below the box; a turntable, the turntable being coaxially arranged with the drive shaft; A lifting member, comprising a No. 1 arm, a guide shaft, a limit shaft, and a No. 2 arm. The No. 1 arm is provided with a guide shaft and a limit shaft at both ends, the limit shaft being restricted from rotating below the box body. The No. 2 arm is provided at the other end of the limit shaft. The rotating shaft passes through the sleeve and is connected to the No. 2 arm and is rotatable relative to the No. 2 arm. One side of the outer ring surface of the sleeve is inwardly recessed to form two spiral grooves, which are arranged in a mirror-image manner. The drive shaft rotates until the two ends of the drive rod are respectively embedded in the two spiral grooves, driving the sleeve to rotate 180° forward and 180° reverse. The turntable has a closed guide slot, the guide shaft is embedded in the guide slot, and when the turntable is rotated, the guide slot pushes the guide shaft, causing the lifting member to rotate around the limiting shaft and drive the rotating shaft to move up and down.

2. The double-circulation automatic humidity regulating device for a bread fermentation box according to claim 1, characterized in that: The movable disk is a semicircular structure, and an outer ring surface of the placement disk is provided with an upwardly protruding first fence, and the two assembled movable disks are placed in the first fence with a clearance fit.

3. The double-circulation automatic humidity regulating device for a bread fermentation box according to claim 2, characterized in that: The outer ring surface of the movable plate is provided with a second fence protruding upward, and the side surface of the second fence is provided with a handle. When the movable plate is placed on the placement plate, the handle is higher than the first fence.

4. The double-circulation automatic humidity regulating device for a bread fermentation box according to claim 1, characterized in that: A raised limiting strip is provided on the outer side of the rotating shaft, and a recessed limiting groove is provided on the inner side of the sleeve. The limiting strip is loosely fitted in the limiting groove, so that the rotating shaft is radially fixed relative to the sleeve.

5. The double-circulation automatic humidity regulating device for a bread fermentation box according to claim 1, characterized in that: The rotating shaft passes through the sleeve and is connected to the bottom rod. The outer ring surface of the bottom rod is provided with an inwardly recessed annular groove. The No. 2 arm is provided with a connecting shaft, and the connecting shaft is horizontally placed in the annular groove so that the No. 2 arm can rotate relative to the No. 2 arm.

6. The double-circulation automatic humidity regulating device for a bread fermentation box according to claim 1, characterized in that: The transmission member also includes a connecting rod and an arc-shaped plate, the connecting rod and the driving rod are fixed perpendicularly to each other at one end of the driving shaft, and the driving shaft is located at the intersection of the connecting rod and the driving rod; the arc-shaped plate is fixed at both ends of the connecting rod, and both ends of the sleeve extend outward to form a positioning part, and positioning grooves are provided on both sides corresponding to the positioning part, and the positioning grooves on both sides of the same positioning part are respectively connected to the same end of the two spiral grooves; when the driving rod rotates to leave the spiral groove, the arc-shaped plate rotates accordingly to pass through the positioning groove.

7. The double-circulation automatic humidity regulating device for a bread fermentation box according to claim 1, characterized in that: The transmission mechanism further includes a drive motor, which drives the drive shaft to rotate.

8. The operating method of the double-circulation automatic humidity regulating device for a bread fermentation box according to claim 1, characterized in that: Follow these steps: Place the dough to be fermented on a movable tray, and then place the movable tray on a rack; The drive shaft is rotated so that the end of the drive rod penetrates into the forward spiral groove, thereby driving the sleeve to rotate 180 degrees in the forward direction. The sleeve synchronously drives the rotating shaft to rotate, thereby driving the placement plate, the movable plate and the dough to rotate accordingly. At the same time, the drive shaft synchronously drives the rotating plate to rotate, and the guide groove pushes the guide shaft, causing the No. 2 arm to rotate around the limit shaft and drive the rotating shaft to rise and fall, thereby causing the placement plate, the movable plate and the dough to rise and fall accordingly. After the driving shaft rotates until the end of the driving rod leaves the positive spiral groove, the sleeve loses drive and stops rotating, but the driving shaft still drives the turntable to rotate, pushing the rotating shaft up and down, thereby causing the placement plate, the movable plate and the dough to rise and fall accordingly; The drive shaft rotates until the end of the drive rod penetrates the reverse spiral groove, thereby driving the sleeve to rotate 180 degrees in the opposite direction. The sleeve synchronously drives the rotating shaft to rotate, thereby driving the placement plate, the movable plate and the dough to rotate accordingly. At the same time, the drive shaft continues to synchronously drive the rotation of the rotating plate, pushing the rotating shaft to rise and fall, thereby causing the placement plate, the movable plate and the dough to rise and fall accordingly. After the driving shaft rotates until the end of the driving rod leaves the reverse spiral groove, the sleeve loses drive again and stops rotating, and the driving shaft still drives the turntable to rotate, pushing the rotating shaft to rise and fall, thereby causing the placement plate, the movable plate and the dough to rise and fall accordingly; When the humidity in the accommodating space of the box is less than 70%, hot and humid air is introduced into the rotating shaft and flows into the accommodating space through the vent holes for humidification.

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