Constant-temperature fermentation tank

Abstract

The invention discloses a constant-temperature fermentation tank which comprises a tank body, a water supply mechanism and a constant-temperature stirring mechanism are arranged on the tank body, and the constant-temperature stirring mechanism comprises a stirring assembly; the stirring assembly comprises an outer pipe driven by the driving unit to rotate and a middle pipe arranged on the inner side of the outer pipe, the constant-temperature stirring mechanism comprises a first water supply pipe and a first water pumping pipe, the first water supply pipe is inserted into the outer pipe and located above the middle pipe, the first water pumping pipe is inserted into the middle pipe, and a distance is formed between the first water pumping pipe and the bottom of the middle pipe; the water level of the outer pipe is higher than that of the middle pipe; the outer pipe is connected with a stirring blade, the stirring blade is internally provided with a circulating flow channel, the circulating flow channel is connected with the outer pipe and the middle pipe, and water in the outer pipe flows through the circulating flow channel from top to bottom and then enters the bottom of the middle pipe. According to the constant-temperature fermentation tank, the interior of the tank body is cooled while stirring is conducted through the stirring assembly, continuous circulation of cooling water is achieved according to the liquid level difference principle, and the fermentation tank is in a constant-temperature state.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial fermentation, and particularly relates to a constant-temperature fermentation tank. Background Art

[0002] Microbial fermentation refers to the process of using microorganisms to convert raw materials into products required by humans through specific metabolic pathways under suitable conditions. The production level of microbial fermentation mainly depends on the genetic characteristics of the strains themselves and the culture conditions. Microorganisms include a large group of organisms such as bacteria, viruses, fungi, and some small protozoa and microalgae. They are tiny in size and closely related to humans, covering a wide range of beneficial and harmful types, and are widely involved in many fields such as food, medicine, industry and agriculture, and environmental protection.

[0003] In the brewing process, existing fermentation tanks generally use double-layer fermentation tanks, and stirring paddles are arranged inside the tank body for stirring. At the same time, since heat is generated during microbial fermentation, the temperature inside the tank will rise. Therefore, cooling water is introduced into the outer layer to ensure the fermentation temperature. When the external environmental temperature is too low, hot water is introduced into the outer layer to ensure the fermentation temperature. This heating method will cause a temperature difference between the outer side and the center of the fermentation tank, making it difficult to achieve uniform heating and cooling. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: The present invention provides a constant-temperature fermentation tank, which cools or heats the inside of the tank body while stirring through a stirring component, and realizes the continuous circulation of water by using the principle of liquid level difference, so that the fermentation tank is in a constant-temperature state.

[0005] The technical solution adopted by the present invention to solve its technical problems is: A constant-temperature fermentation tank, including a tank body, a water supply mechanism and a constant-temperature stirring mechanism are provided on the tank body, and the constant-temperature stirring mechanism includes a stirring component; The stirring component includes an outer tube driven by a driving unit to rotate and a middle tube arranged inside the outer tube. The constant-temperature stirring mechanism includes a first water supply pipe and a first water extraction pipe. The first water supply pipe is inserted into the outer tube and is located above the middle tube. The first water extraction pipe is inserted into the middle tube and is arranged at a distance from the bottom of the middle tube. The water level in the outer tube is higher than the water level in the middle tube; The outer tube is connected with stirring paddles, and a circulation channel is arranged inside the stirring paddles. The circulation channel is connected with the outer tube and the middle tube, and the water in the outer tube flows through the circulation channel from top to bottom and then flows into the bottom of the middle tube.

[0006] Further, while water enters the outer tube, water is pumped out from the middle tube to create a liquid level difference. A guiding member is provided at the upper end of the middle tube inside the outer tube. The guiding member is provided with a guiding channel. The first water supply pipe is inserted into the guiding channel, and water enters the outer tube along the guiding channel. The first water extraction pipe passes through the guiding member and extends into the middle tube, and a water level sensor is provided on the first water extraction pipe.

[0007] Further, in order to make the water fill the outer tube along the inner wall of the outer tube, the outlet of the guiding channel is close to the inner wall of the outer tube, and the water flowing out from the outlet of the guiding channel flows downward along the inner wall of the outer tube.

[0008] Further, in order to prevent the water level in the outer tube from being too high, an overflow port is provided at the upper end of the middle tube. When the water level in the outer tube is higher than the overflow port, water enters the middle tube through the overflow port.

[0009] Further, in order to achieve the coaxial installation of the outer tube and the middle tube and not affect the water inlet of the outer tube, a positioning ring is sleeved on the middle part of the middle tube. The positioning ring is in clearance fit with the inner wall of the outer tube, and a notch for water flow is provided on the positioning ring.

[0010] Further, in order to accelerate the heating and cooling speed of the materials in the fermentation tank, the stirring paddle includes two layers of spiral blades arranged at intervals. The outer edges of the spiral blades are sealed by a spiral tube to form a circulation flow channel. The upper end of the spiral blade is connected to a water inlet pipe connected to the outer tube, and the lower end is connected to a water outlet pipe connected to the middle tube. Openings facing the circulation flow channel are provided on the water inlet pipe and the water outlet pipe. The water inlet pipe is located below the middle tube, and the water outlet pipe is located below the positioning ring.

[0011] Further, in order to ensure that the water at the bottom of the outer tube also circulates, a connecting ring is provided at the lower end of the middle tube. The connecting ring is hermetically connected to the inner wall of the outer tube, and through holes are provided on the connecting ring. The connecting ring is located below the water inlet pipe.

[0012] Further, in order to prevent the water level inside the middle tube from being too low, the water supply mechanism further includes a makeup water pipe, and the makeup water pipe is located above the guiding member.

[0013] Further, in order to further control the temperature in the area farther from the stirring paddle, the constant temperature stirring mechanism further includes a plurality of U-shaped circulation pipes located in the outer edge area of the tank body. The tank body is provided with a separated inner water tank and outer water tank, and there is a liquid level difference between the inner water tank and the outer water tank. The two ends of the U-shaped circulation pipe respectively extend into the inner water tank and the outer water tank.

[0014] Further, in order to prevent the liquid level difference between the inner water tank and the outer water tank from being too large, a baffle is provided between the inner water tank and the outer water tank. The baffle is provided with overflow holes, and water temperature sensors and water level sensors are provided in the inner water tank and / or the outer water tank.

[0015] Further, in order to enable water to enter the inner water tank evenly, the constant-temperature stirring mechanism further includes a second water supply pipe connected to the inner water tank and a second water extraction pipe connected to the outer water tank, and the second water supply pipes are evenly distributed at intervals along the circumference of the inner water tank.

[0016] Further, in order to cool the circulating water, the water supply mechanism further includes a circulating water refrigeration component, the circulating water refrigeration component includes a thermoelectric cooler, water tanks are arranged on both the refrigerating surface and the heat dissipating surface of the thermoelectric cooler, the water tank includes a water inlet end, a water outlet end and fins arranged from the water inlet end to the water outlet end, and a flow equalizing plate is arranged between the water inlet end and the end of the heat sink.

[0017] Further, the hot water flowing out from the U-shaped circulation pipe and the stirring component enters the water tank on the refrigerating surface to be cooled and then flows back into the U-shaped circulation pipe and the stirring component.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. For the constant-temperature fermentation tank of the present invention, by forming a water circulation between the outer pipe, the stirring paddle and the middle pipe, and relying on the liquid level difference between the outer pipe and the middle pipe to achieve uniform water flow, it is ensured that while the stirring component is stirring, the temperature of the materials in the tank can change uniformly, the contact area is increased, and the efficiency is high.

[0019] 2. For the constant-temperature fermentation tank of the present invention, a U-shaped circulation pipe is arranged in the outer edge area of the tank, and the uniform water circulation is also achieved by using the liquid level difference between the inner water tank and the outer water tank, ensuring uniform temperature change in the outer edge area of the tank.

[0020] 3. For the constant-temperature fermentation tank of the present invention, the circulating water refrigeration component cools the circulating water to ensure the cooling effect of the circulating water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the drawings and embodiments.

[0022] Figure 1 is a schematic structural diagram of the constant-temperature fermentation tank of the present invention; Figure 2 is a schematic structural diagram of the stirring component; Figure 3 is a partial structural diagram of the stirring component; Figure 4 is Figure 3 a partial structural diagram of; Figure 5 is a schematic structural diagram of the guide member; Figure 6 is Figure 3 a partial structural diagram of; Figure 7 is Figure 1 a partial structural diagram of; Figure 8 Explosion diagram of the circulating water cooling component; Figure 9 Schematic three-dimensional structure diagram of the water tank; Figure 10 Schematic principle diagram of the constant temperature fermentation tank; In the figure: 1. Tank body, 11. Inner water tank, 12. Outer water tank, 13. Baffle, 14. Overflow hole, 2. Water supply mechanism, 21. Circulating water cooling component, 211. Semiconductor refrigeration sheet, 212. Water tank, 213. Water inlet end, 214. Water outlet end, 215. Fins, 216. Flow equalizing plate, 22. First water supply pipe, 23. First water extraction pipe, 24. Second water supply pipe, 25. Second water extraction pipe, 26. Make-up water pipe, 3. Stirring component, 31. Outer pipe, 32. Middle pipe, 321. Overflow port, 33. Stirring paddle, 34. Water inlet pipe, 35. Water outlet pipe, 36. Deflector, 361. Deflection channel, 37. Connecting ring, 371. Through hole, 38. Positioning ring, 381. Notch, 39. Water level sensor, 4. U-shaped circulation pipe. Detailed implementation mode

[0023] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] As Figure 1 shown, a constant temperature fermentation tank includes a tank body 1, and a water supply mechanism 2 and a constant temperature stirring mechanism are provided on the tank body 1.

[0027] As Figure 8 and Figure 9 shown, the water supply mechanism 2 includes a circulating water refrigeration component 21. The circulating water refrigeration component 21 includes a semiconductor refrigeration sheet 211. Water tanks 212 are provided on both the refrigerating surface and the heat dissipating surface of the semiconductor refrigeration sheet 211, and the water tanks 212 are sealed by a cover plate. The water tank 212 includes a water inlet end 213, a water outlet end 214, and fins 215 arranged from the water inlet end 213 to the water outlet end 214. A flow equalizing plate 216 is provided between the water inlet end 213 and the end of the heat sink. When water enters from the water inlet end 213, due to the blocking of the flow equalizing plate 216, the water will first accumulate between the flow equalizing plate 216 and the water inlet end 213 until the water level exceeds the flow equalizing plate 216, and then the water uniformly flows towards the rear fins 215 through the flow equalizing plate 216, and the heat is carried away by the fins 215 and finally discharged from the water outlet end 214. Here, the water tank 212 on the refrigerating surface is communicated with the circulating water flowing through the constant temperature stirring mechanism, while the water tank 212 on the heat dissipating surface is connected to another water source, and this water source has nothing to do with the circulating water of the constant temperature stirring mechanism.

[0028] The circulating water flowing through the constant temperature stirring mechanism will enter the water tank 212 and be cooled under the action of the semiconductor refrigeration sheet 211. The specific flow mode of the circulating water will be further described below in combination with the constant temperature stirring mechanism.

[0029] As Figures 2 to 6 shown, the constant temperature stirring mechanism includes a stirring component 3. The stirring component 3 includes an outer tube 31 driven by a driving unit to rotate and a middle tube 32 arranged inside the outer tube 31. The driving unit includes a servo motor and a speed reducer. The speed reducer is driven by the servo motor, and a synchronous belt is connected to the speed reducer, and the outer tube 31 is driven to rotate by the synchronous belt. At the same time, components such as deep groove ball bearings, plain bearings, and fixing clips are provided to ensure the stable rotation of the outer tube 31.

[0030] The water supply mechanism 2 includes a first water supply pipe 22 and a first water extraction pipe 23. The first water supply pipe 22 extends into the upper end of the outer pipe 31, and the first water supply pipe 22 is above the middle pipe 32. The first water extraction pipe 23 is inserted into the middle pipe 32 and has a spacing from the bottom of the middle pipe 32. The water level in the outer pipe 31 is higher than the water level in the middle pipe 32. A stirring paddle 33 is connected to the outer pipe 31. The stirring paddle 33 has a circulation channel. The circulation channel is connected to the outer pipe 31 and the middle pipe 32. The water in the outer pipe 31 flows through the circulation channel from top to bottom and then flows out from the middle pipe 32. The water is cooled by the circulating water cooling component 21, and then enters the outer pipe 31 through the first water supply pipe 22. The water in the outer pipe 31 will enter the stirring paddle 33 and flow back to the middle pipe 32 through the stirring paddle 33. The first water extraction pipe 23 extracts the water in the middle pipe 32 and then enters the circulating water cooling component 21 for cooling. In this way, a continuous stirring and function of the stirring component 3 are formed through circulation.

[0031] The stirring paddle 33 includes two layers of spiral blades arranged at intervals. The outer edges of the spiral blades are sealed by a spiral pipe to form a circulation channel. The upper end of the spiral blade is connected to a water inlet pipe 34 connected to the outer pipe 31, and the lower end is connected to a water outlet pipe 35 connected to the middle pipe 32. The water inlet pipe 34 and the water outlet pipe 35 are provided with openings facing the circulation channel. The water inlet pipe 34 is below the middle pipe 32, and the water outlet pipe 35 is below the positioning ring 38. When the water level in the outer pipe 31 is higher than the water inlet pipe 34, the water will enter the spiral blade along the water inlet pipe 34, and the water will flow downward along the circulation channel and enter the lower part of the middle pipe 32 from the water outlet pipe 35. The water level in the middle pipe 32 gradually rises until the water level rises to the first water extraction pipe 23, and the water is extracted from the first water extraction pipe 23.

[0032] There is a guiding member 36 at the upper end of the middle pipe 32 in the outer pipe 31. The guiding member 36 has a guiding channel 361. The first water supply pipe 22 is inserted into the guiding channel 361. The outlet of the guiding channel 361 is close to the inner wall of the outer pipe 31. The water flowing out from the outlet of the guiding channel 361 flows downward along the inner wall of the outer pipe 31, so that the water enters the outer pipe 31 along the guiding channel 361. The first water extraction pipe 23 passes through the guiding member 36 and extends into the middle pipe 32. A water level sensor 39 is provided on the first water extraction pipe 23. The guiding member 36 does not contact the inner wall of the outer pipe 31. At the same time, its outlet faces the inner wall of the outer pipe 31. After the water flow flows out from the outlet, it will flow downward along the outer pipe 31, gradually filling the outer pipe 31, and then realizing water circulation according to the above flow path.

[0033] An overflow port 321 is provided at the upper end of the middle pipe 32. When the water level in the outer pipe 31 is higher than the overflow port 321, water enters the middle pipe 32 through the overflow port 321. If the water level in the outer pipe 31 is too high, water will enter the middle pipe 32 through the overflow port 321, and the water in the middle pipe 32 is discharged through the first water suction pipe 23. Since there is always a water level difference between the outer pipe 31 and the middle pipe 32, that is, the water level in the outer pipe 31 is higher than the water level in the middle pipe 32, the water in the outer pipe 31 will continuously flow into the middle pipe 32 through the stirring paddle 33, and the water flow rate is accelerated by using the water level difference.

[0034] A connecting ring 37 is provided at the lower end of the middle pipe 32. The connecting ring 37 is hermetically connected to the inner wall of the outer pipe 31. A through hole 371 is provided on the connecting ring 37. The connecting ring 37 is located below the water inlet pipe 34. Since the water in the upper half of the outer pipe 31 will enter the stirring paddle 33, in order to prevent the water at the bottom of the outer pipe 31 from not participating in the circulating flow, a plurality of through holes 371 with smaller sizes are provided on the connecting ring 37. The water at the bottom of the outer pipe 31 will flow downward through the through holes 371, and the bottom of the connecting ring 37 is exactly the water inlet of the middle pipe 32. A water flow with a smaller flow rate will be formed at the bottom of the outer pipe 31 and the bottom of the middle pipe 32, ensuring that water flows are also formed at the bottoms of the outer pipe 31 and the middle pipe 32, preventing the bottom of the outer pipe 31 from becoming a stagnant water state, and further preventing the water temperature inside the outer pipe 31 from being uneven.

[0035] A positioning ring 38 is sleeved in the middle of the middle pipe 32. The positioning ring 38 is in clearance fit with the inner wall of the outer pipe 31. The positioning ring 38 is provided with a notch 381 for water flow. In order to coaxially install the middle pipe 32 and the outer pipe 31, the positioning ring 38 is used for connection, and at the same time, the notch 381 on the positioning ring 38 does not affect the water flow in the outer pipe 31.

[0036] The water supply mechanism 2 further includes a make-up water pipe 26. The make-up water pipe 26 is located above the guide member 36. When the water level in the outer pipe 31 is insufficient, the outer pipe 31 is replenished with water through the make-up water pipe 26. The first water supply pipe 22, the first water suction pipe 23, and the make-up water pipe 26 are connected to an independent connecting component, and the three are not directly connected to the outer pipe 31. Therefore, when the outer pipe 31 rotates, it does not affect the above pipelines.

[0037] Such as Figure 7As shown in the figure, the constant temperature stirring mechanism further includes a plurality of U-shaped circulation pipes 4 located in the outer edge area of the tank body 1, and the U-shaped circulation pipes 4 are arranged at equal intervals around the center of the tank body 1. The tank body 1 is provided with a separated inner water tank 11 and outer water tank 12, and there is a water level difference between the inner water tank 11 and the outer water tank 12. The two ends of the U-shaped circulation pipe 4 respectively extend into the inner water tank 11 and the outer water tank 12. Taking the inner water tank 11 as the water inlet tank and the outer water tank 12 as the water pumping tank for illustration, the constant temperature stirring mechanism further includes a second water supply pipe 24 connected to the inner water tank 11 and a second water pumping pipe 25 connected to the outer water tank 12. The second water supply pipe 24 is evenly distributed at equal intervals along the circumference of the inner water tank 11. Since the inner water tank 11 and the outer water tank 12 are annular structures, the second water supply pipe 24 adopts a multi-point distribution, which can ensure uniform water supply. The water in the second water supply pipe 24 enters the inner water tank 11, the water in the inner water tank 11 will enter the U-shaped circulation pipe 4, the water flows along the U-shaped circulation pipe 4 into the inner water tank 11, is pumped out through the second water pumping pipe 25 and then enters the circulating water refrigeration component 21, and the water is refrigerated by the circulating water refrigeration component 21 and then flows back into the inner water tank 11, thereby realizing the water circulation in the U-shaped circulation pipe 4.

[0038] A baffle 13 is provided between the inner water tank 11 and the outer water tank 12, and the baffle 13 is provided with an overflow hole 14, and overflow can occur when the water level in any water tank is too high. A water temperature sensor and a water level sensor are provided in the inner water tank 11 and / or the outer water tank 12.

[0039] After the water enters the inner water tank 11 and the outer pipe 31, it is necessary to detect the temperature at a higher water level to ensure the temperature of the circulating water. Heating rods can also be provided on the first water supply pipe 22 and the second water supply pipe 24, so as to meet the heating requirements of the fermentation tank. The circulating water after flowing needs to detect the water temperature at the corresponding water outlet position as well, so as to judge the temperature value in the tank and ensure the cooling effect in the tank.

[0040] In the present invention, all water supply and pumping need to pass through water pumps, and the installation positions of the water pumps are set according to needs, which has no direct relationship with the inventive concept of the present invention and will not be elaborated here.

[0041] In summary, for the constant temperature fermentation tank of the present invention, while stirring, the stirring component cools the interior of the tank body, and the principle of liquid level difference is adopted to realize the continuous circulation of the cooling water, so that the fermentation tank is in a constant temperature state.

[0042] The above is based on the ideal embodiments of the present invention as inspiration. Through the above description, relevant staff can completely make various changes and modifications within the scope not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A constant temperature fermentation tank, comprising a tank body (1), characterized in that, A water supply mechanism (2) and a constant temperature stirring mechanism are provided on the tank body (1), and the constant temperature stirring mechanism includes a stirring assembly (3). The stirring assembly (3) includes an outer tube (31) driven by a driving unit to rotate and a middle tube (32) provided inside the outer tube (31). The constant temperature stirring mechanism includes a first water supply pipe (22) and a first water extraction pipe (23). The first water supply pipe (22) is inserted into the outer tube (31) and is located above the middle tube (32). The first water extraction pipe (23) is inserted into the middle tube (32) and is spaced from the bottom of the middle tube (32). The water level in the outer tube (31) is higher than the water level in the middle tube (32). A stirring paddle (33) is connected to the outer tube (31). The stirring paddle (33) has a circulation flow channel inside, and the circulation flow channel is connected to the outer tube (31) and the middle tube (32). The water in the outer tube (31) flows from top to bottom through the circulation flow channel and then flows into the bottom of the middle tube (32).

2. The constant temperature fermentation tank according to claim 1, wherein, A guide member (36) is provided at the upper end of the middle tube (32) inside the outer tube (31). The guide member (36) has a guide channel (361). The first water supply pipe (22) is inserted into the guide channel (361), and water enters the outer tube (31) along the guide channel (361). The first water extraction pipe (23) passes through the guide member (36) and extends into the middle tube (32). A water level sensor (39) is provided on the first water extraction pipe (23). The water supply mechanism (2) further includes a make-up water pipe (26), and the make-up water pipe (26) is located above the guide member (36).

3. The constant temperature fermentation tank according to claim 2, characterized in that, The outlet of the guide channel (361) is close to the inner wall of the outer tube (31), and the water flowing out of the outlet of the guide channel (361) flows downward along the inner wall of the outer tube (31).

4. The constant temperature fermentation tank according to claim 1, characterized in that, An overflow port (321) is provided at the upper end of the middle tube (32). When the water level in the outer tube (31) is higher than the overflow port (321), water enters the middle tube (32) through the overflow port (321).

5. The constant temperature fermentation tank according to claim 1, characterized in that, A positioning ring (38) is sleeved in the middle of the middle tube (32). The positioning ring (38) is in clearance fit with the inner wall of the outer tube (31). A notch (381) for water supply to flow through is provided on the positioning ring (38).

6. The constant temperature fermentation tank according to claim 5, characterized in that, The stirring paddle (33) includes two layers of spiral blades arranged at intervals. The outer edges of the spiral blades are sealed by a spiral tube to form a circulation flow channel. The upper end of the spiral blade is connected to a water inlet pipe (34) connected to the outer tube (31), and the lower end is connected to a water outlet pipe (35) connected to the middle tube (32). Openings facing the circulation flow channel are provided on the water inlet pipe (34) and the water outlet pipe (35). The water inlet pipe (34) is located below the middle tube (32), and the water outlet pipe (35) is located below the positioning ring (38).

7. The constant temperature fermentation tank according to claim 6, characterized in that, A connecting ring (37) is provided at the lower end of the middle tube (32). The connecting ring (37) is hermetically connected to the inner wall of the outer tube (31). A through hole (371) is provided on the connecting ring (37). The connecting ring (37) is located below the water inlet pipe (34).

8. The constant temperature fermentation tank according to claim 1, wherein, The constant temperature stirring mechanism further includes a plurality of U-shaped circulation pipes (4) located in the outer edge area of the tank body (1). The tank body (1) is provided with a mutually separated inner water tank (11) and an outer water tank (12). There is a water level difference between the inner water tank (11) and the outer water tank (12). Both ends of the U-shaped circulation pipe (4) extend into the inner water tank (11) and the outer water tank (12) respectively.

9. The constant temperature fermentation tank according to claim 8, characterized in that, A baffle (13) is provided between the inner water tank (11) and the outer water tank (12). The baffle (13) is provided with an overflow hole (14). A water temperature sensor and a water level sensor are provided in the inner water tank (11) and / or the outer water tank (12). The constant temperature stirring mechanism further includes a second water supply pipe (24) connected to the inner water tank (11) and a second water extraction pipe (25) connected to the outer water tank (12). The second water supply pipes (24) are evenly distributed at intervals along the circumference of the inner water tank (11).

10. The constant temperature fermentation tank according to claim 9, wherein, The water supply mechanism (2) further includes a circulating water refrigeration component (21). The circulating water refrigeration component (21) includes a semiconductor refrigeration sheet (211). Water tanks (212) are provided on both the refrigerating surface and the heat dissipating surface of the semiconductor refrigeration sheet (211). The water tank (212) includes a water inlet end (213), a water outlet end (214), and fins (215) arranged from the water inlet end (213) to the water outlet end (214). A flow equalizing plate (216) is provided between the water inlet end (213) and the end of the heat sink. The hot water flowing out of the U-shaped circulation pipe (4) and the stirring component (3) enters the water tank (212) on the refrigerating surface, is cooled, and then flows back into the U-shaped circulation pipe (4) and the stirring component (3).

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