Cyclic heating type mushroom dryer

Abstract

The cyclic heating type shiitake mushroom drying machine comprises a machine body, oppositely-opened door bodies are installed on the two symmetrical sides of the machine body respectively, and a centrifugal fan and a moisture removal fan are installed on the outer side wall of the machine body; a heater is mounted on the inner side wall of the machine body, a fixing disc is fixedly connected to the end, away from the inner wall of the machine body, of the heater, a plurality of mounting bases are symmetrically mounted on the fixing disc, a limiting disc is fixedly connected to each mounting base, and a rotary clamping mechanism is mounted in each mounting base. A rotating base is installed at the rotating output end of the rotating clamping mechanism, and two drying discs are symmetrically installed at the clamping output end of the rotating clamping mechanism. And a motor is mounted on the outer side wall of the machine body. The shiitake mushroom drying device has the advantages that shiitake mushrooms on the rotating base and the drying disc rotate around the axis of the rotating shaft, the positions are continuously adjusted, all parts of the shiitake mushrooms can make full contact with hot air, the drying speed and uniformity are improved, and the drying quality of the shiitake mushrooms is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of mushroom processing, in particular to a circulating heating type mushroom drying machine. Background Art

[0002] As a common edible fungus, the drying process of shiitake mushroom is very important for prolonging the storage time and improving the quality. In the prior art, there are some shortcomings in the shiitake mushroom drying machine.

[0003] Traditional mushroom dryers usually use simple heating methods, such as electric heating or gas heating. The hot air circulation effect in the drying room is not good, which easily leads to uneven heating of the mushrooms and affects the drying quality. The structural design of some dryers is relatively simple, lacking effective rotation or flipping mechanisms, making it difficult for the mushrooms to fully contact the hot air during the drying process, resulting in a long drying time and low efficiency.

[0004] In addition, the existing mushroom dryers are often fixed in design of drying trays, which cannot be flexibly adjusted according to the number and size of mushrooms, and have poor adaptability. Moreover, some dryers are not smart enough in terms of dehumidification function, and cannot be accurately adjusted according to the actual humidity in the drying room, which easily leads to over-dehumidification or under-dehumidification, affecting the drying effect.

[0005] Therefore, we propose a circulating heating mushroom drying machine to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art and to propose a circulating heating type mushroom drying machine.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A circulating heating mushroom drying machine comprises a machine body, wherein two symmetrical sides of the machine body are respectively provided with double-opening door bodies, a centrifugal fan and a dehumidification fan are installed on the outer side wall of the machine body, and an air outlet pipe of the centrifugal fan extends into the machine body, and an air inlet pipe of the dehumidification fan extends into the machine body;

[0009] A heater is installed on the inner wall of the body, and a fixed disk is fixedly connected to one end of the heater away from the inner wall of the body, and a plurality of mounting seats are symmetrically installed on the fixed disk, and each mounting seat is fixedly connected to a limiting disk, and a rotating clamping mechanism is installed in the mounting seat, and a rotating seat is installed at the rotating output end of the rotating clamping mechanism, and two drying plates are symmetrically installed at the clamping output end of the rotating clamping mechanism, and the two drying plates are symmetrically slidably connected in the rotating seat;

[0010] A motor is installed on the outer wall of the machine body, and the output end of the motor extends into the machine body and is connected to the rotating clamping mechanism through a transmission mechanism.

[0011] In the above-mentioned circulating heating mushroom drying machine, the machine body includes an outer box body, an insulation layer and an inner tank, a temperature sensor and a humidity sensor are installed inside the machine body, an air valve is installed on the dehumidification fan, a controller is installed on the outer wall of the machine body, and the centrifugal fan, dehumidification fan, temperature sensor, humidity sensor, air valve and motor are all electrically connected to the controller.

[0012] In the above-mentioned circulating heating mushroom drying machine, the rotating clamping mechanism includes a rotating shaft, a transmission shaft and an input shaft, and the rotating shaft, the transmission shaft and the input shaft are all located in the mounting seat, and the axes of the rotating shaft, the transmission shaft and the input shaft are parallel to each other, and the rotating shaft passes through the limiting plate and is fixedly connected to the rotating seat, the input shaft is mounted with a first spur gear through a one-way bearing, and the input shaft is mounted with a second spur gear;

[0013] A rotating gear and a ring gear are installed on the rotating shaft, and the rotating gear is interference fit on the rotating shaft through a key, and the ring gear sleeve is arranged on the rotating shaft, and the rotating gear is meshed with the first spur gear;

[0014] A driven gear and a worm are mounted on the input shaft, a transverse shaft is also mounted in the mounting seat, and the axis of the transverse shaft is perpendicular to the axis of the rotating shaft, a worm wheel and a driving gear are mounted on the transverse shaft, and the worm wheel is meshed with the worm, and the driving gear is meshed with the ring gear;

[0015] A bidirectional threaded rod is horizontally installed in the rotating seat, a driven gear is installed in the middle of the bidirectional threaded rod, and the driven gear is meshed with the ring gear, two limit frames are symmetrically threaded on the bidirectional threaded rod, and each drying plate is fixedly connected to the limit frame at the corresponding position.

[0016] In the above-mentioned circulating heating mushroom drying machine, the output shaft of the motor extends into the body and is installed with a planetary gear carrier, each of the input shafts extends outside the mounting seat and is installed with a driving gear, and each driving gear is meshed with the planetary gear carrier.

[0017] In the above-mentioned circulating heating mushroom dryer, the planetary gear frame includes planetary gears, and the driving gear is meshed with the planetary gears. A plurality of extension frames are symmetrically installed on the end faces of the planetary gears. An annular seat is fixedly connected to the plurality of extension frames, and the annular seat is installed on the output shaft of the motor.

[0018] In the above-mentioned circulating heating mushroom dryer, each of the drying plates includes a drying frame, and the limiting frame is fixedly connected to the side wall of the drying frame, a placing net is installed in the drying frame, a sealing ring groove is provided on the upper end surface of the drying frame located at the bottom, and a sealing ring seat is fixedly connected to the lower end surface of the drying frame located at the top.

[0019] In the above-mentioned circulating heating mushroom dryer, an installation cavity is opened inside the rotating seat, and the bidirectional threaded rod and the driven gear are both located in the installation cavity, a through hole is opened on the rotating seat, and the through hole is connected to the installation cavity, and the rotating shaft passes through the through hole and is installed on the inner wall of the installation cavity, and the inner diameter of the through hole is larger than the outer diameter of the ring tooth.

[0020] In the above-mentioned circulating heating mushroom drying machine, two limiting grooves are symmetrically provided on the rotating seat, and each limiting groove is communicated with the installation cavity, and each limiting frame is slidably connected in the limiting groove corresponding to the position.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The motor drives the input shaft to rotate through the planetary gear rack, which in turn causes the rotating seat and the mushrooms on the drying plate to rotate around the axis of the rotating shaft, constantly adjusting their positions so that all parts of the mushrooms can fully contact the hot air, thereby improving the drying speed and uniformity.

[0023] 2. The temperature sensor and humidity sensor inside the machine can monitor the temperature and humidity in the drying room in real time, and feed the data back to the controller to achieve precise control of the drying process. The controller automatically controls the operation of the centrifugal fan, dehumidification fan, heater and motor according to the data of the temperature and humidity sensors, ensuring that the temperature and humidity in the drying room are always within the appropriate range to ensure the drying quality of the mushrooms.

[0024] 3. The motor drives the planetary gear rack to rotate, so that the input shaft rotates, and then a series of transmissions are used to adjust the distance between the two limit frames on the bidirectional threaded rod, that is, to adjust the distance between the two drying plates, so as to facilitate the placement of mushrooms.

[0025] In summary, the shiitake mushrooms on the rotating seat and the drying plate in the present invention rotate around the axis of the rotating shaft and continuously adjust their positions so that all parts of the shiitake mushrooms can fully contact the hot air, thereby improving the drying speed and uniformity and ensuring the drying quality of the shiitake mushrooms. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural schematic diagram of a circulating heating mushroom drying machine proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of a circulating heating mushroom drying machine proposed by the present invention;

[0028] Figure 3 for Figure 2 Another visual perspective;

[0029] Figure 4 for Figure 3 Schematic diagram of the structure with the fixed plate removed;

[0030] Figure 5 This is an enlarged view of the structure of the planetary gear rack in a circulating heating mushroom drying machine proposed by the present invention;

[0031] Figure 6 This is an enlarged view of the structure of the drying plate in the circulating heating mushroom drying machine proposed by the present invention;

[0032] Figure 7 This is an enlarged view of the structure of the limiting frame in the circulating heating mushroom drying machine proposed by the present invention;

[0033] Figure 8 This is an enlarged view of the structure of the rotating gear part in a circulating heating mushroom drying machine proposed by the present invention;

[0034] Fig. 9 This is an enlarged view of the structure of the worm part in a circulating heating mushroom drying machine proposed by the present invention;

[0035] Fig.10 This is an enlarged view of the internal structure of a rotating seat in a circulating heating mushroom drying machine proposed by the present invention.

[0036] In the figure: 1 body, 2 door body, 3 centrifugal fan, 4 dehumidification fan, 5 planetary gear frame, 501 planetary gear, 502 extension frame, 503 annular seat, 6 mounting seat, 7 heater, 8 drying plate, 801 placement net, 802 drying frame, 803 sealing ring seat, 804 sealing ring groove, 9 driving gear, 10 motor, 11 rotating seat, 12 limiting plate, 13 fixed plate, 14 input shaft, 15 limiting frame, 16 horizontal axis, 17 pushing gear, 18 transmission shaft, 19 driven gear, 20 worm gear, 21 rotating shaft, 22 rotating gear, 23 second spur gear, 24 first spur gear, 25 worm, 26 bidirectional threaded rod, 27 mounting cavity, 28 through hole, 29 limiting groove, 30 ring gear, 31 driven gear. DETAILED DESCRIPTION

[0037] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0038] Example

[0039] Reference Figure 1-10A circulating heating mushroom drying machine comprises a machine body 1, and a door body 2 is installed on both symmetrical sides of the machine body 1. The door body 2 is arranged on both sides and is designed to be opened and closed, so that the mushrooms can be put in and taken out. The operation is convenient and the operation can be carried out in a close cooperation with the machine body 1 when the door body 2 is closed to ensure that the heat and moisture will not leak in large quantities during the drying process. A centrifugal fan 3 and a dehumidification fan 4 are installed on the outer wall of the machine body 1, and the air outlet duct of the centrifugal fan 3 extends into the machine body 1, and the air inlet duct of the dehumidification fan 4 extends into the machine body 1. The machine body comprises an outer box body, an insulation layer and an inner tank. A temperature sensor and a humidity sensor are installed inside the machine body 1, and an air valve is installed on the dehumidification fan 4. A controller is installed on the outer wall of the machine body 1, and the centrifugal fan 3, the dehumidification fan, the temperature sensor, the humidity sensor, the air valve and the motor 10 are all electrically connected to the controller.

[0040] A heater 7 is installed on the inner wall of the body 1, and one end of the heater 7 away from the inner wall of the body 1 is fixedly connected to a fixed disk 13, and a plurality of mounting seats 6 are symmetrically installed on the fixed disk 13, and each mounting seat 6 is fixedly connected to a limiting disk 12, and a rotating clamping mechanism is installed in the mounting seat 6, and a rotating seat 11 is installed at the rotating output end of the rotating clamping mechanism, and two drying plates 8 are symmetrically installed at the clamping output end of the rotating clamping mechanism, and the two drying plates 8 are symmetrically slidably connected in the rotating seat 11, each drying plate 8 includes a drying frame 802, and the limiting frame 15 is fixedly connected to the side wall of the drying frame 802, and a placing net 801 is installed in the drying frame 802, and a sealing ring groove 804 is opened on the upper end surface of the drying frame 802 located at the bottom, and a sealing ring seat 803 is fixedly connected to the lower end surface of the drying frame 802 located at the top.

[0041] The rotary clamping mechanism includes a rotary shaft 21, a transmission shaft 18 and an input shaft 14, and the rotary shaft 21, the transmission shaft 18 and the input shaft 14 are all located in the mounting seat 6, and the axes of the rotary shaft 21, the transmission shaft 18 and the input shaft 14 are parallel to each other, and the rotary shaft 21 passes through the limit plate 12 and is fixedly connected to the rotary seat 11, and a first spur gear 24 is installed on the input shaft 14 through a one-way bearing, and a second spur gear 23 is installed on the input shaft 14;

[0042] A rotating gear 22 and a ring gear 30 are installed on the rotating shaft 21, and the rotating gear 22 is interference fit on the rotating shaft 21 through a key, and the ring gear 30 is sleeved on the rotating shaft 21, and the rotating gear 22 is meshed with the first spur gear 24. The rotating shaft 21 connects the rotating seat 11 and the input shaft 14, and transmits the power of the input shaft 14 to the rotating seat 11, so that the rotating seat 11 drives the mushrooms on the drying plate 8 to rotate, ensuring that all parts of the mushrooms can fully contact the hot air, thereby improving the drying uniformity;

[0043] A driven gear 19 and a worm 25 are mounted on the input shaft 14, a transverse shaft 16 is also mounted in the mounting seat 6, and the axis of the transverse shaft 16 is perpendicular to the axis of the rotating shaft 21, a worm wheel 20 and a push gear 17 are mounted on the transverse shaft 16, and the worm wheel 20 is meshed with the worm 25, and the push gear 17 is meshed with the ring gear 30, the input shaft 14 receives the power of the motor 10 through the transmission connection with the motor 10, and transmits the power to the rotating shaft 21 and other transmission components, so as to realize various actions of the rotating clamping mechanism;

[0044] A bidirectional threaded rod 26 is horizontally installed in the rotating seat 11, and a driven gear 31 is installed in the middle of the bidirectional threaded rod 26, and the driven gear 31 is meshed with the ring gear 30. Two limit frames 15 are symmetrically threaded on the bidirectional threaded rod 26, and each drying plate 8 is fixedly connected to the limit frame 15 at the corresponding position. A mounting cavity 27 is opened inside the rotating seat 11, and the bidirectional threaded rod 26 and the driven gear 31 are both located in the mounting cavity 27. A through hole 28 is opened on the rotating seat 11, and the through hole 28 is connected to the mounting cavity 27, and the rotating shaft 21 passes through the through hole 28 and is installed on the inner wall of the mounting cavity 27, and the inner diameter of the through hole 28 is larger than the outer diameter of the ring gear 30. Two limit grooves 29 are symmetrically opened on the rotating seat 11, and each limit groove 29 is connected to the mounting cavity 27, and each limit frame 15 is slidably connected in the limit groove 29 at the corresponding position.

[0045] A motor 10 is installed on the outer wall of the body 1, and the output end of the motor 10 extends into the body 1 and is connected to the rotating clamping mechanism through a transmission mechanism. The transmission mechanism includes a planetary gear frame 5, and the planetary gear frame 5 is located in the body 1 and is installed on the output shaft of the motor 10. Each input shaft 14 extends to the outside of the mounting seat 6 and is installed with a driving gear 9, and each driving gear 9 is meshed with the planetary gear frame 5. The planetary gear frame 5 includes a planetary gear 501, and the driving gear 9 is meshed with the planetary gear 501. A plurality of extension frames 502 are symmetrically installed on the end surface of the planetary gear 501, and an annular seat 503 is fixedly connected to the plurality of extension frames 502, and the annular seat 503 is installed on the output shaft of the motor 10.

[0046] After the power is turned on, the device is started through the controller on the outer wall of the body 1. The controller is electrically connected to the centrifugal fan 3, the dehumidification fan 4, the temperature sensor, the humidity sensor, the air valve and the motor 10 to realize the control of the entire drying process. The body 1 is composed of an outer box, an insulation layer and an inner tank, which can effectively reduce heat loss. The internal temperature sensor and humidity sensor monitor the temperature and humidity in the drying room in real time and feed the data back to the controller.

[0047] When drying, first open the door body 2 to expose the drying area inside the machine body 1, start the motor 10, and the motor 10 drives the planetary gear carrier 5 to rotate in the opposite direction, thereby causing the driving gear 9 to drive the input shaft 14 to rotate counterclockwise. When the input shaft 14 rotates counterclockwise, the input shaft 14 drives the second spur gear 23 to rotate when it rotates counterclockwise, and the second spur gear 22 drives the driven gear 19 meshing therewith to rotate, thereby driving the transmission shaft 18 to drive the worm 25 to rotate, and the worm 25 drives the horizontal shaft 16 to rotate through the worm gear 20, thereby pushing the gear 17 to drive the ring gear 30 to slide in the direction of the rotating seat 11, and when the ring gear 30 slides, it drives the driven gear 31 to rotate, thereby causing the bidirectional threaded rod 26 to rotate in the opposite direction, thereby adjusting the distance between the two limit frames 15, that is, adjusting the spacing between the two drying trays 8, so that the distance between the two drying trays 8 is The distance between the two limit frames 15 is increased, and the drying plate 8 is ensured to be in a horizontal state, which is convenient for placing the mushrooms. The mushrooms are then evenly placed on the drying plate 8 placement net 801 below. After the placement is completed, the motor 10 is started again, and the motor 10 drives the planetary gear frame 5 to rotate forward. At this time, the driving gear 9 drives the input shaft 14 to rotate clockwise, and then drives the ring gear 30 to slide in the direction away from the rotating seat 11, so that the two-way threaded rod 26 rotates forward, thereby adjusting the distance between the two limit frames 15 and shortening the spacing between the two drying plates 8. The first straight gear 24 does not rotate therewith under the limitation of the one-way bearing and the rotating gear 22, so the drying plate 8 and the mushrooms do not rotate, and the sealing ring seat 803 on the lower end face of the upper drying plate 802 cooperates with the sealing ring groove 804 on the upper end face of the lower drying plate 802 to clamp the mushrooms between the two drying plates 8.

[0048] The door 2 is then closed to ensure that heat and moisture do not leak in large quantities during the drying process. The heater 7 is mounted on the inner wall of the machine body 1 and starts to heat the air after being started. The centrifugal fan 3 blows the heated hot air into the machine body 1 through the air outlet pipe, so that the hot air circulates in the drying room to ensure that the mushrooms can be evenly heated.

[0049] After the motor 10 is started again, its output shaft drives the planetary gear frame 5 to rotate in the opposite direction, and then the driving gear 9 drives the input shaft 14 to rotate counterclockwise. When the input shaft 14 rotates counterclockwise, the one-way bearing locks the first straight gear 24. The first straight gear 24 drives the rotating seat 11 to rotate through the rotating shaft 21, and then drives the mushrooms stuck between the two drying plates 8 to rotate around the axis of the rotating shaft 21, so that the mushrooms on the drying plates 8 can continuously adjust their positions while rotating to ensure uniform heating. The heater 7 continues to heat, the centrifugal fan 3 keeps the hot air circulating, and the dehumidification fan 4 dehumidifies in time according to the humidity conditions until the mushrooms reach the required drying degree.

[0050] When the humidity in the drying room reaches a certain level, the humidity sensor transmits a signal to the controller. The controller controls the dehumidification fan 4 to start and extract the moisture in the drying room through the air inlet pipe. The dehumidification fan 4 is equipped with an air valve to adjust the dehumidification air volume according to actual conditions.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A circulating heating mushroom drying machine, comprising a machine body (1), characterized in that: The machine body (1) is symmetrically provided with door bodies (2) that open opposite to each other, and a centrifugal fan (3) and a dehumidification fan (4) are installed on the outer side wall of the machine body (1), and the air outlet pipe of the centrifugal fan (3) extends into the machine body (1), and the air inlet pipe of the dehumidification fan (4) extends into the machine body (1); A heater (7) is mounted on the inner wall of the machine body (1); one end of the heater (7) away from the inner wall of the machine body (1) is fixedly connected to a fixed disk (13); a plurality of mounting seats (6) are symmetrically mounted on the fixed disk (13); each mounting seat (6) is fixedly connected to a limiting disk (12); a rotating clamping mechanism is mounted in the mounting seat (6); a rotating seat (11) is mounted at the rotating output end of the rotating clamping mechanism; two drying plates (8) are symmetrically mounted at the clamping output end of the rotating clamping mechanism, and the two drying plates (8) are symmetrically slidably connected in the rotating seat (11); A motor (10) is mounted on the outer wall of the machine body (1); an output end of the motor (10) extends into the machine body (1) and is connected to the rotary clamping mechanism via a transmission mechanism.

2. A circulating heating mushroom drying machine according to claim 1, characterized in that: The machine body comprises an outer box body, a heat-insulating layer and an inner liner; a temperature sensor and a humidity sensor are installed inside the machine body (1); an air valve is installed on the dehumidification fan (4); a controller is installed on the outer wall of the machine body (1); and the centrifugal fan (3), the dehumidification fan, the temperature sensor, the humidity sensor, the air valve and the motor (10) are all electrically connected to the controller.

3. The circulating heating mushroom drying machine according to claim 1 is characterized in that: The rotary clamping mechanism comprises a rotary shaft (21), a transmission shaft (18) and an input shaft (14), wherein the rotary shaft (21), the transmission shaft (18) and the input shaft (14) are all located in a mounting seat (6), and the axes of the rotary shaft (21), the transmission shaft (18) and the input shaft (14) are parallel to each other, and the rotary shaft (21) passes through a limiting plate (12) and is fixedly connected to the rotary seat (11), and a first spur gear (24) is mounted on the input shaft (14) via a one-way bearing, and a second spur gear (23) is mounted on the input shaft (14); A rotating gear (22) and a ring gear (30) are mounted on the rotating shaft (21), and the rotating gear (22) is interference fit on the rotating shaft (21) through a key, and the ring gear (30) is sleeved on the rotating shaft (21), and the rotating gear (22) is meshed with the first spur gear (24); A driven gear (19) and a worm (25) are mounted on the input shaft (14); a transverse shaft (16) is also mounted in the mounting seat (6); the axis of the transverse shaft (16) is perpendicular to the axis of the rotating shaft (21); a worm wheel (20) and a driving gear (17) are mounted on the transverse shaft (16); the worm wheel (20) is meshed with the worm (25); and the driving gear (17) is meshed with the ring gear (30); A bidirectional threaded rod (26) is horizontally installed in the rotating seat (11), a driven gear (31) is installed in the middle of the bidirectional threaded rod (26), and the driven gear (31) is meshed with the ring gear (30), two limit frames (15) are symmetrically threadedly connected on the bidirectional threaded rod (26), and each drying plate (8) is fixedly connected to the limit frame (15) at a corresponding position.

4. A circulating heating mushroom drying machine according to claim 3, characterized in that: The transmission mechanism comprises a planetary gear carrier (5), and the planetary gear carrier (5) is located in the machine body (1) and mounted on the output shaft of the motor (10), each of the input shafts (14) extends outside the mounting seat (6) and is mounted with a driving gear (9), and each driving gear (9) is meshed with the planetary gear carrier (5).

5. The circulating heating mushroom drying machine according to claim 4 is characterized in that: The planetary gear carrier (5) comprises a planetary gear (501), and the driving gear (9) meshes with the planetary gear (501); a plurality of extension frames (502) are symmetrically mounted on the end surface of the planetary gear (501); an annular seat (503) is fixedly connected to the plurality of extension frames (502); and the annular seat (503) is mounted on the output shaft of the motor (10).

6. The circulating heating mushroom drying machine according to claim 3 is characterized in that: Each drying tray (8) comprises a drying frame (802), and a limiting frame (15) is fixedly connected to the side wall of the drying frame (802), a placement net (801) is installed in the drying frame (802), a sealing ring groove (804) is formed on the upper end surface of the drying frame (802) located at the bottom, and a sealing ring seat (803) is fixedly connected to the lower end surface of the drying frame (802) located at the top.

7. The circulating heating mushroom drying machine according to claim 3 is characterized in that: The rotating seat (11) is provided with an installation cavity (27) inside, and the bidirectional threaded rod (26) and the driven gear (31) are both located in the installation cavity (27); the rotating seat (11) is provided with a through hole (28), and the through hole (28) is communicated with the installation cavity (27); the rotating shaft (21) passes through the through hole (28) and is installed on the inner wall of the installation cavity (27); and the inner diameter of the through hole (28) is greater than the outer diameter of the ring gear (30).

8. The circulating heating mushroom drying machine according to claim 7, characterized in that: The rotating seat (11) is symmetrically provided with two limiting grooves (29), each limiting groove (29) is communicated with the installation cavity (27), and each limiting frame (15) is slidably connected in the limiting groove (29) at a corresponding position.

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