Constant temperature fermentation tank

Abstract

The present invention discloses a constant temperature fermentation tank, comprising a tank body, the tank body being provided with a water supply mechanism and a constant temperature stirring mechanism, the constant temperature stirring mechanism comprising a stirring assembly; the stirring assembly comprising an outer tube driven and rotated by a driving unit and a middle tube arranged inside the outer tube; the constant temperature stirring mechanism comprising a first water supply pipe and a first water extraction pipe, the first water supply pipe being inserted into the outer tube and being located above the middle tube, the first water extraction pipe being inserted into the middle tube and being spaced apart from the bottom of the middle tube, the water level in the outer tube being higher than the water level in the middle tube; the outer tube being connected to a stirring blade, the stirring blade having a circulation channel therein, the circulation channel being connected to the outer tube and the middle tube, the water in the outer tube flowing from top to bottom through the circulation channel and then entering the bottom of the middle tube. The constant temperature fermentation tank of the present invention cools the interior of the tank body while stirring by the stirring assembly, and adopts the principle of liquid level difference to realize continuous circulation of cooling water, so that the fermentation tank is kept in a constant temperature state.

Description

Technical Field

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

[0002] Microbial fermentation refers to the process of using microorganisms, under appropriate conditions, to convert raw materials through specific metabolic pathways into products desired by humans. The level of microbial fermentation production depends primarily on the genetic characteristics of the strain itself and the culture conditions. Microorganisms encompass a broad group of organisms, including bacteria, viruses, fungi, small protozoa, and microscopic algae. These tiny organisms interact closely with humans, encompassing a wide range of both beneficial and harmful species, and are widely involved in a wide range of fields, including food, medicine, industry, agriculture, and environmental protection.

[0003] In the winemaking process, existing fermentation tanks typically use double-layered tanks with internal stirring blades for agitation. Because microbial fermentation generates heat, the temperature inside the tank rises. Therefore, cooling water is introduced into the outer layer to maintain the fermentation temperature. When the ambient temperature is too low, hot water is introduced into the outer layer to maintain the fermentation temperature. This heating method creates a temperature difference between the outer and inner sides 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 uses a stirring component to cool or heat the inside of the tank while stirring, and adopts the principle of liquid level difference to realize continuous circulation of water, so that the fermentation tank is in a constant temperature state.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a constant temperature fermentation tank, comprising a tank body, the tank body is provided with a water supply mechanism and a constant temperature stirring mechanism, the constant temperature stirring mechanism includes a stirring assembly;

[0006] The stirring assembly includes an outer tube driven and rotated by a driving unit 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 spaced apart from the bottom of the middle tube, and the water level in the outer tube is higher than the water level in the middle tube;

[0007] The outer tube is connected to a stirring blade, and a circulation channel is provided in the stirring blade. The circulation channel is connected to the outer tube and the middle tube. Water in the outer tube flows from top to bottom through the circulation channel and then flows into the bottom of the middle tube.

[0008] Furthermore, while water is entering the outer tube, water is pumped out by the middle tube to achieve a liquid level difference. The outer tube is provided with a flow guide located at the upper end of the middle tube, and the flow guide is provided with a flow guide channel. The first water supply pipe is inserted into the flow guide channel, and water enters the outer tube along the flow guide channel. The first water pumping pipe passes through the flow guide and extends into the middle tube. A water level sensor is provided on the first water pumping pipe.

[0009] Furthermore, in order to allow water to fill the outer tube along the inner wall of the outer tube, the outlet of the diversion channel is close to the inner wall of the outer tube, and the water flowing out of the outlet of the diversion channel flows downward along the inner wall of the outer tube.

[0010] Furthermore, 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.

[0011] Furthermore, in order to achieve coaxial installation of the outer tube and the middle tube without affecting water inlet into the outer tube, a positioning ring is sleeved on the middle part of the middle tube, and the positioning ring is gap-fitted with the inner wall of the outer tube, and a notch is provided on the positioning ring for water flow.

[0012] Furthermore, in order to speed up the heating and cooling of the material in the fermentation tank, the stirring blade includes two layers of spiral blades arranged at intervals, and the outer edges of the spiral blades are sealed by spiral tubes to form a circulation channel. The upper end of the spiral blade is connected to an inlet pipe connected to the outer tube, and the lower end is connected to an outlet pipe connected to the middle tube. The inlet pipe and the outlet pipe are provided with openings facing the circulation channel. The inlet pipe is located below the middle tube, and the outlet pipe is located below the connecting ring.

[0013] Furthermore, in order to ensure that the water at the bottom of the outer tube is also circulated, a connecting ring is provided at the lower end of the middle tube, and the connecting ring is sealed to the inner wall of the outer tube. A through hole is opened on the connecting ring, and the connecting ring is located below the water inlet pipe.

[0014] Furthermore, in order to prevent the water level inside the middle pipe from being too low, the water supply mechanism further includes a water supply pipe, and the water supply pipe is located above the flow guide.

[0015] Furthermore, in order to further control the temperature of the area farther away from the stirring blades, the constant temperature stirring mechanism also includes a plurality of U-shaped circulation pipes located in the outer edge area of ​​the tank body, and the tank body is provided with an inner water tank and an outer water tank separated from each other, and there is a water level difference between the inner water tank and the outer water tank, and the two ends of the U-shaped circulation pipe extend into the inner water tank and the outer water tank respectively.

[0016] Furthermore, in order to avoid excessive liquid level difference between the inner water tank and the outer water tank, a baffle is provided between the inner water tank and the outer water tank, the baffle is provided with an overflow hole, and a water temperature sensor and a water level sensor are provided in the inner water tank and / or the outer water tank.

[0017] Furthermore, in order to allow water to enter the inner water tank evenly, the constant temperature stirring mechanism also 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 along the circumference of the inner water tank.

[0018] Furthermore, in order to cool the circulating water, the water supply mechanism also includes a circulating water refrigeration component, which includes a semiconductor refrigeration plate. The cooling surface and the heat dissipation surface of the semiconductor refrigeration plate are both provided with a water trough. The water trough includes a water inlet end, a water outlet end and fins arranged along the water inlet end to the water outlet end. A flow equalizer is provided between the water inlet end and the end of the heat sink.

[0019] Furthermore, the hot water flowing out of the U-shaped circulation pipe and the stirring assembly enters the water tank of the refrigeration surface to be cooled and then flows back into the U-shaped circulation pipe and the stirring assembly.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The constant temperature fermentation tank of the present invention forms a water circulation between the outer tube, the stirring blade and the middle tube, and relies on the liquid level difference between the outer tube and the middle tube to achieve uniform flow of water, ensuring that the stirring component can achieve uniform temperature changes of the material in the tank body while stirring, thereby increasing the contact area and achieving high efficiency.

[0022] 2. The constant temperature fermentation tank of the present invention is provided with a U-shaped circulation pipe in the outer edge area of ​​the tank, and the water level difference between the inner water tank and the outer water tank is also used to achieve uniform water circulation, thereby ensuring uniform temperature changes in the outer edge area of ​​the tank.

[0023] 3. The constant temperature fermentation tank of the present invention refrigerates the circulating water through the circulating water refrigeration component to ensure the cooling effect of the circulating water. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 It is a structural schematic diagram of the constant temperature fermentation tank of the present invention;

[0026] Figure 2 Schematic diagram of the structure of the stirring component;

[0027] Figure 3 It is a schematic diagram of the local structure of the stirring component;

[0028] Figure 4 for Figure 3 Schematic diagram of the local structure;

[0029] Figure 5 Schematic diagram of the structure of the guide member;

[0030] Figure 6 for Figure 3 Schematic diagram of the local structure;

[0031] Figure 7 for Figure 1 Schematic diagram of the local structure;

[0032] Figure 8 This is an exploded view of the circulating water refrigeration component;

[0033] Figure 9 Schematic diagram of the three-dimensional structure of the sink;

[0034] Figure 10 This is a schematic diagram of the principle of a constant temperature fermentation tank;

[0035] 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 refrigeration component, 211. semiconductor refrigeration plate, 212. water tank, 213. water inlet end, 214. water outlet end, 215. fin, 216. flow equalizer, 22. first water supply pipe, 23. first water extraction pipe, 24. second water supply pipe, 25. second water extraction pipe, 26. water supply pipe, 3. stirring assembly, 31. outer pipe, 32. middle pipe, 321. overflow port, 33. stirring blade, 34. water inlet pipe, 35. water outlet pipe, 36. guide member, 361. diversion channel, 37. connecting ring, 371. through hole, 38. positioning ring, 381. notch, 39. water level sensor, 4. U-shaped circulation pipe. DETAILED DESCRIPTION

[0036] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] like Figure 1 As shown, a constant temperature fermentation tank comprises a tank body 1 on which a water supply mechanism 2 and a constant temperature stirring mechanism are provided.

[0040] like Figure 8 and Figure 9 As shown, the water supply mechanism 2 includes a circulating water cooling assembly 21, which includes a semiconductor cooling plate 211. The cooling surface and the heat dissipation surface of the semiconductor cooling plate 211 are both provided with a water tank 212, and the water tank 212 is sealed by a cover. 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 plate 216 is provided between the water inlet end 213 and the end of the heat sink. When water enters the water inlet end 213, due to the obstruction of the flow plate 216, the water will first accumulate between the flow plate 216 and the water inlet end 213 until the water level exceeds the flow plate 216. The water then flows evenly through the flow plate 216 to the rear fins 215, removes heat through the fins 215, and is finally discharged from the water outlet end 214. Here, the water tank 212 on the cooling surface is connected to the water flowing through the constant temperature stirring mechanism, while the water tank 212 on the heat dissipation surface is connected to another water source, which is unrelated to the circulating water of the constant temperature stirring mechanism.

[0041] The circulating water flowing through the constant temperature stirring mechanism will enter the water tank 212 and be cooled by the semiconductor refrigeration plate 211. The specific flow mode of the circulating water will be further explained below in conjunction with the constant temperature stirring mechanism.

[0042] like Figures 2 to 6 As shown, the constant temperature stirring mechanism includes a stirring assembly 3, which includes an outer tube 31 driven and rotated by a drive unit and a middle tube 32 arranged inside the outer tube 31. The drive unit includes a servo motor and a reducer. The servo motor drives the reducer, which is connected to a timing belt, which drives the outer tube 31 to rotate. Deep groove ball bearings, plane bearings, and fixing clamps are also provided to ensure the stable rotation of the outer tube 31.

[0043] 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 tube 31 and is above the middle tube 32. The first water extraction pipe 23 is inserted into the middle tube 32 and is spaced apart 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. The outer tube 31 is connected to a stirring blade 33, which has a circulation channel therein. The circulation channel connects the outer tube 31 and the middle tube 32, so that water in the outer tube 31 flows from top to bottom through the circulation channel and then flows out of the middle tube 32. The water is cooled by the circulating water refrigeration component 21, and then enters the outer tube 31 through the first water supply pipe 22. The water in the outer tube 31 will enter the stirring blade 33, and return to the middle tube 32 through the stirring blade 33. The first water extraction pipe 23 extracts the water in the middle tube 32 and enters the circulating water refrigeration component 21 for cooling. This cycle forms continuous stirring and function of the stirring component 3.

[0044] The stirring blades 33 include two layers of spaced spiral blades, the outer edges of which are sealed by a spiral tube to form a circulation channel. The upper ends of the spiral blades are connected to an inlet pipe 34 connected to the outer tube 31, and the lower ends are connected to an outlet pipe 35 connected to the middle tube 32. The inlet pipe 34 and the outlet pipe 35 are each provided with an opening facing the circulation channel. The inlet pipe 34 is located below the middle tube 32, and the outlet pipe 35 is located below the connecting ring 37. When the water level in the outer tube 31 is higher than the inlet pipe 34, water will enter the spiral blades along the inlet pipe 34, flow downward along the circulation channel, and enter the lower part of the middle tube 32 from the outlet pipe 35. The water level in the middle tube 32 gradually rises until it reaches the first pumping pipe 23, from which the water is pumped out.

[0045] The outer tube 31 includes a flow guide 36 located at the upper end of the middle tube 32. This flow guide 36 has a flow channel 361. The first water supply pipe 22 is inserted into this flow channel 361, with the outlet of the flow channel 361 close to the inner wall of the outer tube 31. Water flowing out of the outlet of the flow channel 361 flows downward along the inner wall of the outer tube 31, entering the outer tube 31 along the flow channel 361. The first water extraction pipe 23 extends through the flow guide 36 into the middle tube 32. A water level sensor 39 is provided on the first water extraction pipe 23. The flow guide 36 does not contact the inner wall of the outer tube 31, and the outlet faces the inner wall of the outer tube 31. After flowing out of the outlet, the water flows downward along the outer tube 31, gradually filling the outer tube 31, and then completing the water circulation according to the flow path described above.

[0046] The upper end of the middle tube 32 is provided with an overflow port 321. When the water level in the outer tube 31 is higher than the overflow port 321, water flows into the middle tube 32 through the overflow port 321. If the water level in the outer tube 31 is too high, water will flow into the middle tube 32 through the overflow port 321. The water in the middle tube 32 is then discharged through the first pumping pipe 23. Because there is a constant water level difference between the outer tube 31 and the middle tube 32 (i.e., the water level in the outer tube 31 is higher than that in the middle tube 32), the water in the outer tube 31 continuously flows into the middle tube 32 through the stirring blades 33, accelerating the flow rate by utilizing the water level difference.

[0047] A connecting ring 37 is provided at the lower end of the middle tube 32. The connecting ring 37 is sealed 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. Since the water in the upper half of the outer tube 31 will enter the stirring blade 33, in order to prevent the water at the bottom of the outer tube 31 from being unable to participate in the circulation flow, a plurality of smaller through holes 371 are provided on the connecting ring 37. The water at the bottom of the outer tube 31 will flow downward from the through holes 371. The bottom of the connecting ring 37 happens to be the water inlet of the middle tube 32. A small water flow will form at the bottom of the outer tube 31 and the bottom of the middle tube 32, ensuring that water flows are formed at the bottom of the outer tube 31 and the bottom of the middle tube 32, thereby preventing the bottom of the outer tube 31 from becoming stagnant water and thus avoiding uneven water temperature inside the outer tube 31.

[0048] A positioning ring 38 is sleeved around the center of the middle tube 32. This ring is fitted with a clearance fit against the inner wall of the outer tube 31 and includes a notch 381 for water flow. This notch 381 ensures coaxial installation of the middle and outer tubes 32 and 31, while maintaining a symmetrical connection. The notch 381 does not interfere with water flow in the outer tube 31.

[0049] The water supply mechanism 2 also includes a water replenishment pipe 26, located above the flow guide 36. When the water level in the outer tube 31 is insufficient, water is replenished through the water replenishment pipe 26. The first water supply pipe 22, the first water extraction pipe 23, and the water replenishment pipe 26 are connected to independent connecting components and are not directly connected to the outer tube 31. Therefore, rotation of the outer tube 31 does not affect these pipes.

[0050] like Figure 7As shown, the constant temperature stirring mechanism also 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 evenly spaced around the center of the tank body 1. The tank body 1 is provided with an inner water tank 11 and an outer water tank 12 separated from each other, 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 extend into the inner water tank 11 and the outer water tank 12 respectively. The inner water tank 11 is used as the water inlet tank and the outer water tank 12 is used as the water pumping tank for explanation. The constant temperature stirring mechanism also 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 spaced 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 is distributed at multiple points to ensure uniform water supply. The water in the second water supply pipe 24 enters the inner water tank 11, and the water in the inner water tank 11 will enter the U-shaped circulation pipe 4. The water enters the inner water tank 11 along the U-shaped circulation pipe 4, and is pumped out through the second water pumping pipe 25 and enters the circulating water refrigeration component 21. The water is cooled by the circulating water refrigeration component 21 and then flows into the inner water tank 11, thereby realizing the water circulation in the U-shaped circulation pipe 4.

[0051] 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 so that overflow can occur when the water level in either 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.

[0052] After the water enters the inner water tank 11 and outer tube 31, it needs to be temperature-tested at a higher water level to ensure the circulating water's temperature. Heating rods can also be installed on the first and second water supply pipes 22, 24 to meet the fermenter's heating requirements. After the circulating water has flowed, it needs to be temperature-tested at the corresponding outlet to determine the internal tank temperature and ensure effective cooling.

[0053] All water supply and pumping in the present invention need to be done through a water pump. The location of the water pump is set according to needs and has no direct relationship with the inventive concept of the present invention, so it will not be repeated here.

[0054] In summary, the constant temperature fermentation tank of the present invention cools the interior of the tank while stirring through the stirring assembly, and adopts the principle of liquid level difference to realize continuous circulation of cooling water, so that the fermentation tank is kept in a constant temperature state.

[0055] The above description is intended to serve as a guide for the preferred embodiments of the present invention. Based on the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification and 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: The tank body (1) is provided with a water supply mechanism (2) and a constant temperature stirring mechanism, and the constant temperature stirring mechanism includes a stirring assembly (3); The stirring assembly (3) comprises an outer tube (31) driven and rotated by a driving unit and a middle tube (32) arranged on the inner side of the outer tube (31); the constant temperature stirring mechanism comprises a first water supply tube (22) and a first water extraction tube (23); the first water supply tube (22) is inserted into the outer tube (31) and is located above the middle tube (32); the first water extraction tube (23) is inserted into the middle tube (32) and is spaced apart from the bottom of the middle tube (32); the water level of the outer tube (31) is higher than the water level of the middle tube (32); The outer tube (31) is connected to a stirring blade (33), and a circulation channel is provided in the stirring blade (33). The circulation channel is connected to the outer tube (31) and the middle tube (32), and the outlet pipe (35) is located below the connecting ring (37). The water in the outer tube (31) flows from top to bottom through the circulation channel and then flows into the bottom of the middle tube (32). After the water level in the middle tube (32) rises to the first pumping pipe (23), the water is pumped out from the first pumping pipe (23). The outer tube (31) has a flow guide (36) located at the upper end of the middle tube (32), and the flow guide (36) has a flow guide channel (361). The first water supply pipe (22) is inserted into the flow guide channel (361), and water enters the outer tube (31) along the flow guide channel (361). The first water pumping pipe (23) passes through the flow guide (36) and extends into the middle tube (32). The first water pumping pipe (23) is provided with a water level sensor (39). The water supply mechanism (2) also includes a water supply pipe (26), and the water supply pipe (26) is located above the flow guide (36).

2. The constant temperature fermentation tank according to claim 1, characterized in that The outlet of the diversion channel (361) is close to the inner wall of the outer tube (31), and the water flowing out of the outlet of the diversion channel (361) flows downward along the inner wall of the outer tube (31).

3. 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 of the outer tube (31) is higher than the overflow port (321), water enters the middle tube (32) through the overflow port (321).

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

5. The constant temperature fermentation tank according to claim 1, characterized in that The stirring blade (33) comprises two layers of spaced spiral blades, the outer edges of the spiral blades being sealed by a spiral tube to form a circulation channel, the upper end of the spiral blade being connected to a water inlet pipe (34) connected to the outer tube (31), and the lower end being connected to a water outlet pipe (35) connected to the middle tube (32), the water inlet pipe (34) and the water outlet pipe (35) being provided with openings facing the circulation channel, and the water inlet pipe (34) being located below the middle tube (32).

6. The constant temperature fermentation tank according to claim 5, characterized in that A connecting ring (37) is provided at the lower end of the middle tube (32), the connecting ring (37) being sealedly connected to the inner wall of the outer tube (31), a through hole (371) being provided on the connecting ring (37), and the connecting ring (37) is located below the water inlet pipe (34).

7. The constant temperature fermentation tank according to claim 1, characterized in that The constant temperature stirring mechanism further comprises 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 an inner water tank (11) and an outer water tank (12) separated from each other. 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 pipes (4) extend into the inner water tank (11) and the outer water tank (12), respectively.

8. The constant temperature fermentation tank according to claim 7, characterized in that A baffle (13) is provided between the inner water tank (11) and the outer water tank (12), and an overflow hole (14) is provided on the baffle (13). 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 comprises 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 along the circumference of the inner water tank (11).

9. The constant temperature fermentation tank according to claim 8, characterized in that The water supply mechanism (2) further comprises a circulating water refrigeration assembly (21), the circulating water refrigeration assembly (21) comprising a semiconductor refrigeration plate (211), a cooling surface and a heat dissipation surface of the semiconductor refrigeration plate (211) both being provided with water grooves (212), the water grooves (212) comprising a water inlet end (213), a water outlet end (214), and fins (215) arranged along the water inlet end (213) toward the water outlet end (214), a flow equalizing plate (216) being provided between the water inlet end (213) and the end of the heat dissipation plate, and hot water flowing out of the U-shaped circulation pipe (4) and the stirring assembly (3) enters the water grooves (212) on the cooling surface, is cooled, and then flows back into the U-shaped circulation pipe (4) and the stirring assembly (3).

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