Low-temperature cold storage device for beer fermentation

Abstract

The invention discloses a low-temperature cold storage device for beer fermentation, and particularly relates to the technical field of beer fermentation equipment.The low-temperature cold storage device comprises a bottom support, a heat preservation structure is fixedly connected to the upper end of the bottom support, a cover plate structure is connected to the inner surface of the heat preservation structure through a sliding rod, and a discharge pipe communicated with an inner cavity of the heat preservation structure is fixedly connected to the right side of the outer surface of the heat preservation structure; the left portion of the outer surface of the heat preservation structure is provided with a circulation cold insulation structure communicating with an inner cavity of the heat preservation structure. According to the low-temperature cold storage device for beer fermentation, cooling liquid in the heat exchange pipe is kept in a constant low-temperature state under the action of the cooling box, fermentation liquid is stirred in a small range through cooperation of the air supply pipe and the rotational flow assembly synchronously, contact and reaction of the fermentation liquid and yeast are promoted, and furthermore, the temperature of the fermentation liquid is increased; inert gas is filled into the cyclone assembly, so that carbon dioxide generated by fermentation is promoted to be separated out, the content of carbon dioxide in fermentation liquor is reduced, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of beer fermentation equipment, in particular to a low-temperature cold storage device for beer fermentation. Background Art

[0002] The low-temperature cold storage device for beer fermentation is a key auxiliary device in the beer production process. It produces beer by using beer yeast to metabolize the fermentable substances in the wort under low temperature conditions. This device has been widely used in the field of beer fermentation and is crucial to maintaining temperature control during the fermentation process.

[0003] Chinese patent announcement No. CN209352856U discloses a low-temperature cold storage device for beer fermentation, including a fermentation box and an external fixing frame, the bottom outer walls of the four corners of the fermentation box are provided with universal wheels, and the inner side of the fermentation box is provided with a cooling layer, an outer wall on one side of the cooling layer is provided with a liquid inlet pipe, and the outer wall of the liquid inlet pipe is provided with a liquid inlet valve, the liquid inlet pipe is close to the top outer wall of the cooling layer, the outer wall on the other side of the cooling layer is provided with a drain pipe, and the outer wall of the drain pipe is provided with a drain valve, the drain pipe is close to the bottom outer wall of the cooling layer, the top outer wall of the fermentation box is provided with slots at equal distances, and the top outer wall of the external fixing frame is welded with blocks at equal distances, and the blocks are all connected to the inner walls of the slots.

[0004] Although the equipment in the above-mentioned literature can facilitate the removal of yeast, low temperature will cause the precipitation rate of carbon dioxide to be slow during actual use, which may inhibit the fermentation rate of yeast and affect the fermentation effect of beer; Secondly, the cooling effect is poor and the internal beer is heated unevenly, which may lead to inaccurate temperature control during the fermentation process and affect the quality of the beer. These problems limit the performance and efficiency of existing devices. Summary of the invention

[0005] The main purpose of the present invention is to provide a low-temperature cold storage device for beer fermentation, which can effectively solve the problems of slow carbon dioxide precipitation during low-temperature fermentation in existing devices, which will inhibit the yeast fermentation rate, poor cooling effect and uneven heat distribution of the internal beer.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A low-temperature cold storage device for beer fermentation comprises a base, the upper end of the base is fixedly connected to a heat preservation structure, a sliding rod on the inner surface of the heat preservation structure is connected to a cover structure, the right side of the outer surface of the heat preservation structure is fixedly connected to a discharge pipe connected to its inner cavity, the left part of the outer surface of the heat preservation structure is provided with a circulating cold preservation structure connected to its inner cavity, and the upper end of the cover structure is fixedly connected to a hoist.

[0007] Preferably, the insulation structure includes an insulation barrel fixedly connected to the upper end of the base, a heat exchange tube connected to the circulating cold insulation structure is fixedly installed between the inner and outer walls of the insulation barrel, a vortex component connected to the circulating cold insulation structure is rotatably connected to the inner cavity of the insulation barrel, and the inner and outer walls of the insulation barrel are both made of food-grade stainless steel and polyurethane foam is filled between the inner and outer walls.

[0008] Preferably, the cover plate structure includes slide grooves symmetrically opened on the front and rear surfaces of the inner surface of the insulation barrel, and the inner surfaces of the slide grooves on both sides are slidably connected with the inner surface of the insulation barrel to form a yeast placement component, the upper end of the yeast placement component is fixedly connected to a top cover tightly attached to the upper end of the insulation barrel, and the middle part of the upper end of the top cover is provided with a pressure relief component connected to the lower end thereof.

[0009] Preferably, the circulating cold preservation structure includes a cooling box, which is located on the right side of the insulation barrel, and the upper left end of the cooling box is fixedly connected to a return air pipe that is connected to its inner cavity and to the upper inner surface of the insulation barrel, and the lower left end of the cooling box is fixedly connected to an air supply pipe that is connected to the swirl component, and the lower left end of the cooling box is symmetrically distributed front and back and fixedly connected to coolant circulation pipes that are respectively connected to the input and output ends of the swirl component.

[0010] Preferably, the yeast placement assembly comprises a mounting frame slidably connected to the slide groove and the inner surface of the insulation barrel, a plurality of cell filters are fixedly mounted in an annular distribution on the inner surface of the mounting frame, the inner sides of the plurality of cell filters are filled with yeast, cables are symmetrically fixedly connected to the upper ends of the cell filters front and back, and the upper ends of the cables are fixedly connected to the lower end of the top cover.

[0011] Preferably, the pressure relief assembly includes a mounting groove opened at the upper end of the top cover, a convex baffle ring is fixedly connected to the bottom wall of the inner cavity of the pressure relief assembly, the middle part of the vertical part of the convex baffle ring is connected up and down, a mesh plate is fixedly connected to the upper part of the inner surface of the mounting groove, a compression spring is fixedly connected to the lower end of the mesh plate, a snap-fit ​​cover is fixedly connected to the lower end of the compression spring, the snap-fit ​​cover is inverted on the outer surface of the convex baffle ring and its lower end is tightly attached to the upper end of the horizontal part of the convex baffle ring.

[0012] Preferably, the upper end of the horizontal portion of the convex baffle ring is filled with sterile water, and the inner surface of the vertical portion of the convex baffle ring is fixedly connected with a molecular sieve 1, and the molecular sieve 1 only allows carbon dioxide to pass through.

[0013] Preferably, the swirl component includes a central nozzle rotatably connected to the bottom wall of the inner cavity of the heat preservation barrel, the central nozzle is connected to the air supply pipe, the outer surface of the central nozzle is annularly distributed with a plurality of spoiler rods connected with its inner cavity and fixedly connected thereto, several of the spoiler rods are L-shaped and their tail ends are fixedly connected to spoiler windmills through connecting ropes, several of the spoiler rods are linearly distributed on their outer surfaces and fixedly connected with a plurality of cluster nozzles connected with their inner cavity, several of the cluster nozzles are upwardly inclined and their inclination direction is opposite to the rotation direction.

[0014] Preferably, the cooling box includes a cooling chamber located on the upper side and a circulation chamber located on the lower side, a circulation pump is fixedly connected to the bottom wall of the circulation chamber, the circulation pump is divided into two chambers, one of which is connected to the air supply pipe, a connecting pipe 1 is fixedly connected to the upper end of the circulation pump, the upper end of the connecting pipe 1 passes through the top wall of the circulation chamber, extends to the inner wall of the cooling chamber and is fixedly connected to an air storage tank connected to the return air pipe, and the rear end of the air storage tank is fixedly connected to an exhaust pipe connected to the outside.

[0015] Preferably, the other chamber of the circulation pump is connected to the coolant circulation pipe located on the output side of the heat exchange tube, and the input end of the circulation pump and the coolant circulation pipe connecting chamber is fixedly connected with a coolant guide pipe, the upper end of the coolant guide pipe passes through the inner cavity of the circulation chamber, extends to the inner cavity of the cooling chamber and is fixedly connected with a serpentine pipe, the serpentine pipe extends from top to bottom in a serpentine shape and finally passes through the bottom wall of the inner cavity of the cooling chamber, extends to the inner cavity of the circulation chamber and is connected with the coolant circulation pipe on the input side of the heat exchange tube, a semiconductor refrigeration plate tightly attached to the serpentine pipe is fixedly connected to the rear part of the inner cavity of the cooling chamber, a plurality of cooling fins are fixedly connected to the hot end of the semiconductor refrigeration plate, a filter duct connected to the bottom wall of the inner cavity of the circulation chamber is fixedly connected to the top wall of the inner cavity of the circulation chamber, a fan is fixedly connected to the upper side of the inner surface of the filter duct, and the end of the filter duct away from the fan is connected to the outside.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention maintains the coolant in the heat exchange tube at a constant low temperature state through the function of the cooling box, and simultaneously uses the cooperation of the air supply pipe and the swirl component to stir the fermentation liquid slightly, thereby promoting the contact and reaction between the fermentation liquid and yeast. Furthermore, the swirl component is used to fill the inert gas to promote the precipitation of carbon dioxide produced by fermentation, reduce the content of carbon dioxide in the fermentation liquid, and improve product quality.

[0017] 2. The present invention utilizes the air pressure in the heat preservation barrel to push the snap-fit ​​cover upward and compress the compression spring. At this time, the bottom of the snap-fit ​​cover is separated from the convex retaining ring. Under the action of air pressure, sterile water is pressed into the space between the snap-fit ​​cover and the installation groove, promoting carbon dioxide gas to form bubbles from the water and float upward and finally be sent out through the mesh plate, thereby avoiding accidents caused by excessive pressure inside the heat preservation barrel.

[0018] 3. The present invention provides inert gas to the central nozzle through the air supply pipe via a cooling box and sprays it through a cluster nozzle. The reaction force generated by the gas sprayed from the cluster nozzle is used to drive the central nozzle to rotate on the bottom wall of the inner cavity of the heat preservation barrel. The fermentation liquid is driven to rotate and flow in a small range inside the heat preservation barrel through the rotation and the disturbance of the spoiler rod, thereby promoting the fermentation liquid to react with the yeast located in the cell filter, ensuring the uniformity of the contact between the fermentation liquid and the yeast, and thus improving the fermentation efficiency. At the same time, the injection of inert gas helps to control the carbonation level of the beer, and forms a protective layer to prevent yeast oxidation, thereby improving product quality.

[0019] 4. The present invention utilizes the function of a circulation pump to drive the continuous circulation of the coolant in the heat exchange tube, and at the same time cools the coolant through the function of semiconductor refrigeration plates and serpentine tubes to keep the coolant in a low temperature state. Synchronously, the gas storage tank and the circulation pump are used to continuously provide inert gas to the cyclone component, and the carbon dioxide therein is separated and discharged, thereby reducing the carbon dioxide content inside the insulation barrel, thereby improving the fermentation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the cover plate structure and the thermal insulation structure of the present invention; Figure 3 It is a structural schematic diagram of the circulating cold preservation structure of the present invention; Figure 4 It is a structural schematic diagram of the pressure relief assembly of the present invention; Figure 5 It is a schematic diagram of the structure and installation position of the swirl component of the present invention; Figure 6 It is a schematic diagram of the top view of the swirl assembly of the present invention; Figure 7 It is a schematic diagram of the structure of the yeast placement assembly of the present invention; Figure 8 It is a schematic diagram of the internal structure of the cooling box of the present invention; Fig. 9 It is a schematic diagram of the inner structure of the cooling cavity of the present invention; Fig.10 It is a schematic diagram of the filter air duct and the fan installation position of the present invention.

[0021] In the figure: 1. elevator; 2. cover plate structure; 21. top cover; 22. pressure relief assembly; 221. mesh plate; 222. mounting groove; 223. snap-fit ​​cover; 224. compression spring; 225. convex retaining ring; 226. molecular sieve 1; 23. slideway; 24. yeast placement assembly; 241. cable; 242. mounting frame; 243. cell filter; 3. insulation structure; 31. insulation barrel; 32. heat exchange tube; 33. swirl assembly; 331. center nozzle; 332. turbulence Rod; 333, spoiler windmill; 334, cluster nozzle; 4, bottom support; 5, circulating cold preservation structure; 51, cooling box; 510, exhaust pipe; 511, circulation chamber; 512, circulation pump; 513, coolant guide pipe; 514, connecting pipe 1; 515, serpentine pipe; 516, gas storage tank; 517, semiconductor refrigeration plate; 518, filter air duct; 519, fan; 520, cooling chamber; 52, air supply pipe; 53, coolant circulation pipe; 54, return air pipe; 6, discharge pipe. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] Embodiment 1, as Figure 1 As shown, a low-temperature cold storage device for beer fermentation includes a base 4, an insulation structure 3 is fixedly connected to the upper end of the base 4, a cover structure 2 is connected to the sliding rod on the inner surface of the insulation structure 3, a discharge pipe 6 connected to the inner cavity of the insulation structure 3 is fixedly connected to the right side of the outer surface of the insulation structure 3, a circulating cold storage structure 5 connected to the inner cavity is provided on the left part of the outer surface of the insulation structure 3, and a hoist 1 is fixedly connected to the upper end of the cover structure 2.

[0024] It should be noted that the above-mentioned hoist 1 is a conventional lifting equipment, which is composed of a hydraulic cylinder, a suspension, and a lifting arm. It can drive the equipment installed on the lower side of its lifting arm to rise. In the present invention, it is only used to drive the cover plate structure 2 to rise. This structure has been widely used in the prior art and is a mature technical means. The present invention will no longer elaborate on its internal structure, operating principle, wiring, and control method.

[0025] Further, in order to achieve the purpose of keeping the fermentation liquid warm and providing a place for the fermentation reaction, refer to Figure 2 The insulation structure 3 includes an insulation barrel 31 fixedly connected to the upper end of the base 4, a heat exchange pipe 32 connected to the circulating cold insulation structure 5 is fixedly installed between the inner wall and the outer wall of the insulation barrel 31, and a swirl component 33 connected to the circulating cold insulation structure 5 is rotatably connected to the inner cavity of the insulation barrel 31. The inner and outer walls of the insulation barrel 31 are both made of food-grade stainless steel, and polyurethane foam is filled between the inner and outer walls.

[0026] The insulation barrel 31 is made of stainless steel, and its shape is similar to that of an insulation cup, and it is hollow inside. The heat exchange tube 32 is installed between the inner and outer side walls of the insulation barrel 31 but fits the inner wall, and is filled with polyurethane foam. The polyurethane foam has excellent insulation properties. Due to its closed-cell structure, it can effectively block heat transfer and reduce heat loss. It has low thermal conductivity, good insulation effect, light weight, and convenient construction. It is widely used in the fields of building insulation, cold storage, and pipeline insulation. It is a conventional material in the prior art.

[0027] Further, in order to seal the insulation barrel 31 to ensure that the interior is in an anaerobic environment and to ensure the fermentation efficiency, refer to Figure 2 The cover structure 2 includes slide grooves 23 symmetrically opened on the inner surface of the insulation barrel 31, and the inner surfaces of the slide grooves 23 on both sides are slidably connected with the inner surface of the insulation barrel 31 to form a yeast placement component 24. The upper end of the yeast placement component 24 is fixedly connected to the top cover 21 tightly attached to the upper end of the insulation barrel 31, and the middle part of the upper end of the top cover 21 is provided with a pressure relief component 22 connected with the lower end thereof.

[0028] The top cover 21 is used to seal the fermentation equipment. In the later stage of fermentation, it is necessary to isolate external oxygen to create a good environment for yeast reaction. The hoist 1 is used to drive the top cover 21 to rise and fall to achieve the sealing and opening of the insulation barrel 31. At the same time, the yeast placement component 24 is used to place and remove the yeast for easy recycling and reuse.

[0029] Further, in order to keep the inner side of the heat preservation barrel 31 at a low temperature, refer to Figure 2 and Figure 3 The circulating cold preservation structure 5 includes a cooling box 51, which is located on the right side of the heat preservation barrel 31. The upper left end of the cooling box 51 is fixedly connected with a return air pipe 54 which is connected with its inner cavity and the upper inner surface of the heat preservation barrel 31. The lower left end of the cooling box 51 is fixedly connected with an air supply pipe 52 which is connected with the swirl component 33. The lower left end of the cooling box 51 is symmetrically distributed front and back and fixedly connected with coolant circulation pipes 53 which are connected with the input end and the output end of the swirl component 33 respectively.

[0030] The cooling box 51 drives the inert gas or coolant to circulate and ensure that it is in a low temperature state. The thermal conductivity of the inert gas is poor, and the temperature change efficiency is small. No additional heat dissipation is required, and only circulation is required. However, in order to ensure that the fermentation liquid is in a constant low temperature state, a cooling box 51 and a coolant circulation pipe 53 are set to circulate the coolant in the heat exchange tube 32 to keep it at a constant temperature.

[0031] During the operation of this embodiment, the cooling box 51 is used to keep the coolant in the heat exchange tube 32 at a constant low temperature, and the fermentation liquid is simultaneously stirred slightly by the cooperation of the air supply pipe 52 and the swirl component 33 to promote the contact and reaction between the fermentation liquid and yeast. Furthermore, inert gas is filled into the swirl component 33 to promote the precipitation of carbon dioxide produced by fermentation, reduce the content of carbon dioxide in the fermentation liquid, and improve product quality.

[0032] Embodiment 2: Based on Embodiment 1, this embodiment utilizes the air pressure in the heat preservation barrel 31 to push the snap-fit ​​cover 223 upward and compress the compression spring 224. At this time, the bottom of the snap-fit ​​cover 223 is separated from the convex retaining ring 225. Under the action of air pressure, sterile water is pressed into the space between the snap-fit ​​cover 223 and the mounting groove 222, which promotes the formation of bubbles of carbon dioxide gas from the water and floats upward and is finally sent out through the mesh plate 221, thereby avoiding accidents caused by excessive internal pressure of the heat preservation barrel 31.

[0033] Specifically, in order to achieve the periodic release of carbon dioxide generated by fermentation and avoid excessive pressure inside the insulation barrel 31, refer to Figure 4 The pressure relief component 22 includes a mounting groove 222 opened at the upper end of the top cover 21, a convex baffle ring 225 is fixedly connected to the bottom wall of the inner cavity of the pressure relief component 22, the middle part of the vertical part of the convex baffle ring 225 is connected up and down, a mesh plate 221 is fixedly connected to the upper part of the inner surface of the mounting groove 222, a compression spring 224 is fixedly connected to the lower end of the mesh plate 221, a buckle cover 223 is fixedly connected to the lower end of the compression spring 224, and the buckle cover 223 is buckled with the outer surface of the convex baffle ring 225 and its lower end is in close contact with the upper end of the horizontal part of the convex baffle ring 225; The upper end of the horizontal portion of the convex baffle ring 225 is filled with sterile water, and the inner surface of the vertical portion of the convex baffle ring 225 is fixedly connected with a molecular sieve 1 226, which only allows carbon dioxide to pass through.

[0034] Molecular sieve 1 226 is a gas molecular sieve that can separate the inert gas and carbon dioxide. Under normal conditions, the channel formed by the convex retaining ring 225, the buckle cover 223, and the mounting groove 222 is airtight, and the lower part of the buckle cover 223 is tightly fitted with the upper side of the convex retaining ring 225 under the action of the compression spring 224, so that the gas will not leak out. However, when the internal pressure of the heat preservation barrel 31 is too high, the buckle cover 223 will be pushed to move upward. Since the upper side of the horizontal part of the convex retaining ring 225 is filled with water, the carbon dioxide gas will continue to push the water to rise between the buckle cover 223 and the installation groove 222 until the water level is lower than the lower end of the buckle cover 223. The gas will form bubbles in the water between the buckle cover 223 and the installation groove 222 and rise, and finally be discharged through the mesh plate 221. The internal air pressure is reduced, and the buckle cover 223 is reset under the action of the compression spring 224. Due to the sealing and isolation of water, the internal fermentation liquid will not come into contact with the external air, thus avoiding bacterial infection.

[0035] Embodiment 3: Based on Embodiment 2, this embodiment further provides inert gas to the central nozzle 331 through the air supply pipe 52 through the cooling box 51 and sprays it through the cluster nozzle 334. The reaction force generated by the gas sprayed from the cluster nozzle 334 drives the central nozzle 331 to rotate on the bottom wall of the inner cavity of the heat preservation barrel 31. The fermentation liquid is driven to rotate slightly inside the heat preservation barrel 31 through the rotation and the disturbance of the spoiler rod 332, thereby prompting the fermentation liquid to react with the yeast located in the cell filter 243, ensuring the uniformity of the contact between the fermentation liquid and the yeast, thereby improving the fermentation efficiency. At the same time, the injection of inert gas helps to control the carbonation level of the beer, and forms a protective layer to prevent yeast oxidation, thereby improving product quality.

[0036] Specifically, in order to achieve stirring of the fermentation liquid inside the heat preservation barrel 31, promote the contact between the fermentation liquid and the yeast, and promote the heat convection of the fermentation liquid, thereby improving the cooling efficiency and uniformity, refer to Figure 5 and Figure 6 The swirl component 33 includes a central nozzle 331 rotatably connected to the bottom wall of the inner cavity of the heat preservation barrel 31, the central nozzle 331 is connected to the air supply pipe 52, and a plurality of spoiler rods 332 connected to its inner cavity are fixedly connected to the outer surface of the central nozzle 331 in an annular distribution. If the spoiler rods 332 are all L-shaped, their tail ends are fixedly connected to spoiler windmills 333 through connecting ropes. If the spoiler rods 332 are all linearly distributed on the outer surfaces, a plurality of cluster nozzles 334 connected to its inner cavity are fixedly connected, and the plurality of cluster nozzles 334 are inclined upward, and the inclination direction is opposite to the rotation direction.

[0037] The cooling box 51 supplies inert gas to the central nozzle 331 through the air supply pipe 52, and the inert gas is sprayed from the cluster nozzle 334 installed on the spoiler rod 332 around the central nozzle 331. Since the spraying direction is inclined, the spoiler rod 332 and the central nozzle 331 will be driven to rotate at the bottom of the insulation barrel 31. This rotation will slightly stir the fermentation liquid, causing the inert gas bubbles to float up in a swirling shape, thereby driving the fermentation liquid to rotate slightly. It should be stated that carbon dioxide is inevitably produced during the fermentation process. Although it can enrich the taste of beer, too much carbon dioxide may cause the beer to be over-carbonated, thus affecting the taste. The addition of inert gas will increase the total partial pressure of gas in the beer fermentation liquid. According to Henry's law, the solubility of gas in liquid is proportional to its partial pressure on the liquid surface. If the inert gas occupies part of the space, the partial pressure of carbon dioxide will be relatively reduced, which can reduce the solubility of carbon dioxide in beer and promote its precipitation. At the same time, stirring can destroy the carbon dioxide bubbles on the liquid surface and form smaller bubbles, thereby increasing the contact area between the bubbles and the liquid and accelerating the release of carbon dioxide.

[0038] The introduction of inert gas can help control the carbonation level. The inert gas does not participate in the fermentation process. The introduction of inert gas can dilute the carbon dioxide concentration in the insulation barrel 31 and reduce its inhibitory effect on yeast activity. At the same time, the inert gas can form a protective layer to reduce the oxygen content in the tank, prevent yeast oxidation, and reduce the direct impact of carbon dioxide on the yeast.

[0039] Furthermore, in order to fix the yeast and make it fully contact with the fermentation liquid, it can also be easily taken out from the insulation barrel 31 after the fermentation is completed. Figure 7 The yeast placement component 24 includes a mounting frame 242 that is slidably connected to the slide 23 and the inner surface of the insulation barrel 31. A plurality of cell filters 243 are fixedly installed in a circular distribution on the inner surface of the mounting frame 242. The inner sides of the plurality of cell filters 243 are filled with yeast. The upper ends of the cell filters 243 are fixedly connected with cables 241 symmetrically front and back. The upper ends of the cables 241 are fixedly connected to the lower end of the top cover 21.

[0040] It should be noted that the pore size of the cell filter 243 is smaller than the diameter of the yeast cells, but the fermentation liquid is allowed to pass through its pores. The fermentation liquid will produce a small rotation under the action of the cyclone component 33. Under the cyclone condition, the fermentation liquid alternately contacts with the yeast, which can improve the fermentation efficiency, because the contact area between the yeast and the wort remains relatively constant, and a fermentation reaction occurs, and the fermentation liquid follows the circulation of the fermentation liquid and flows in the insulation barrel 31; At the same time, the yeast is fixed in a specific position, which can reduce the impact of free yeast on the clarity of beer. The yeast will not float freely in the entire fermentation tank, thereby reducing the yeast content in the final product and improving clarity.

[0041] At the same time, the heat generated during the fermentation process will cause the temperature of the fermentation liquid to rise. If the temperature is too high, it may inhibit the activity of yeast, affecting the fermentation speed and beer quality; The slight rotation of the swirl assembly 33 will form a swirl-like effect. Due to the Coriolis force, the high-temperature fermentation liquid will tend to move around and rise under the action of thermal convection to avoid the yeast at the bottom. At the same time, the high-temperature fermentation liquid exchanges heat with the heat exchange tubes 32 on the inner wall of the insulation barrel 31 and returns to a low-temperature state. In this process, the fermentation liquid heated by fermentation will continue to rise, forming a heat exchange cycle.

[0042] Embodiment 4: Based on Embodiment 3, this embodiment utilizes the function of the circulation pump 512 to drive the continuous circulation of the coolant in the heat exchange tube 32. At the same time, the coolant is cooled by the function of the semiconductor refrigeration plate 517 and the serpentine tube 515 to keep the coolant in a low temperature state. Simultaneously, the gas storage tank 516 and the circulation pump 512 cooperate to continuously provide inert gas to the swirl component 33, and separate and discharge the carbon dioxide therein, thereby reducing the carbon dioxide content inside the insulation barrel 31, thereby improving the fermentation efficiency.

[0043] Specifically, in order to keep the interior of the heat preservation barrel 31 at a low temperature, an inert gas is filled into the bottom of the fermentation liquid to promote the precipitation of carbon dioxide from the fermentation liquid. Figure 8 , Fig. 9 and Fig.10 The cooling box 51 includes a cooling chamber 520 located on the upper side and a circulation chamber 511 located on the lower side. A circulation pump 512 is fixedly connected to the bottom wall of the inner cavity of the circulation chamber 511. The circulation pump 512 is divided into two chambers, one of which is connected to the air supply pipe 52. A connecting pipe 514 is fixedly connected to the upper end of the circulation pump 512. The upper end of the connecting pipe 514 passes through the top wall of the inner cavity of the circulation chamber 511 and extends to the inner wall of the cooling chamber 520 and is fixedly connected to an air storage tank 516 connected to the return air pipe 54. The rear end of the air storage tank 516 is fixedly connected to an exhaust pipe 510 connected to the outside.

[0044] The circulation pump 512 provides inert gas to the cyclone assembly 33 through the air supply pipe 52, and extracts inert gas from the upper gas storage tank 516 through the connecting pipe 514. The gas storage tank 516 is provided with a gas screen, which can prevent carbon dioxide from flowing to the circulation pump 512 and then discharge carbon dioxide through the exhaust pipe 510. The inert gas continues to be delivered into the cyclone assembly 33 by the circulation pump 512 through the air supply pipe 52.

[0045] The gas sieve in the gas storage tank 516 has basically the same properties as the molecular sieve 226, and both can block the movement of carbon dioxide. It is a conventional technical means and is very mature in the prior art. It will not be demonstrated or explained in the present invention.

[0046] Further, in order to keep the coolant in the heat exchange tube 32 at a low temperature, refer to Figure 8 , Fig. 9 and Fig.10, the other chamber of the circulation pump 512 is connected to the coolant circulation pipe 53 located at the output side of the heat exchange tube 32, and the input end of the circulation pump 512 and the coolant circulation pipe 53 connecting the chamber is fixedly connected with a coolant guide pipe 513, the upper end of the coolant guide pipe 513 passes through the inner cavity of the circulation chamber 511 and extends to the inner cavity of the cooling chamber 520 and is fixedly connected with a serpentine pipe 515, which extends from top to bottom in a serpentine shape and finally passes through the inner cavity bottom wall of the cooling chamber 520 and extends to the inner cavity of the circulation chamber 511 and is connected with the inner cavity of the cooling chamber 520. The coolant circulation pipe 53 on the input side of the heat exchange tube 32 is connected, and a semiconductor refrigeration plate 517 tightly attached to the serpentine tube 515 is fixedly connected to the rear part of the inner cavity of the cooling chamber 520, and a plurality of heat dissipation fins are fixedly connected to the hot end of the semiconductor refrigeration plate 517. A filter duct 518 connected to the bottom wall of the inner cavity of the cooling chamber 520 is fixedly connected to the top wall of the inner cavity of the circulation chamber 511, and a fan 519 is fixedly connected to the upper side of the inner surface of the filter duct 518, and the end of the filter duct 518 away from the fan 519 is connected to the outside.

[0047] It should be specially noted that the semiconductor cooling sheet 517 is a conventional cooling element. The temperature generated by the semiconductor cooling sheet 517 is determined by the voltage provided. It is a mature technical means. During the cooling process, the temperature at one end decreases and heat is generated at the other end. Therefore, it is necessary to dissipate heat and cool down the hot end to ensure its cooling efficiency. The device has been widely used in the prior art, and its installation and control methods will not be displayed or elaborated in the present invention.

[0048] The cold end of the semiconductor refrigeration plate 517 is in contact with the serpentine tube 515, and performs heat exchange with the coolant in the serpentine tube 515 to promote cooling of the coolant. During this process, its hot end will generate heat and be evenly dispersed on the fins. The fan 519 draws in external air through the filter duct 518 and blows air upward, and cools the hot end of the semiconductor refrigeration plate 517 through heat exchange between the airflow and the fins, thereby ensuring the cooling efficiency of its cold end. Simultaneously, the hot air flow will be discharged through the exhaust port on the upper side of the cooling chamber 520.

[0049] It should be specially explained that the above-mentioned circulation pump 512 is a dual-input dual-output piston pump commonly used in the prior art, and has two chambers inside. The two chambers share a piston rod. The piston extends on one side and retracts on the other side, and both the inlet and outlet of the two chambers are provided with a one-way valve, so as to achieve the effect of sucking on one side and pumping out on the other side. This type of piston pump has been widely used in the prior art. In the present invention, it is only used to realize the function of promoting the circulation of coolant and the circulation of inert gas, and its internal structure, operating principle, wiring, and control method are not described in detail.

[0050] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A low-temperature cold storage device for beer fermentation, comprising a base (4), characterized in that: The upper end of the base (4) is fixedly connected to a heat preservation structure (3); a sliding rod on the inner surface of the heat preservation structure (3) is connected to a cover plate structure (2); the right side of the outer surface of the heat preservation structure (3) is fixedly connected to a discharge pipe (6) in communication with its inner cavity; the left side of the outer surface of the heat preservation structure (3) is provided with a circulating cold preservation structure (5) in communication with its inner cavity; and the upper end of the cover plate structure (2) is fixedly connected to a hoist (1).

2. A low-temperature cold storage device for beer fermentation according to claim 1, characterized in that: The heat preservation structure (3) comprises a heat preservation barrel (31) fixedly connected to the upper end of the base (4); a heat exchange pipe (32) connected to the circulating cold preservation structure (5) is fixedly installed between the inner wall and the outer wall of the heat preservation barrel (31); a swirl component (33) connected to the circulating cold preservation structure (5) is rotatably connected to the inner cavity of the heat preservation barrel (31); the inner wall and the outer wall of the heat preservation barrel (31) are both made of food-grade stainless steel, and polyurethane foam is filled between the inner and outer walls.

3. A low-temperature cold storage device for beer fermentation according to claim 2, characterized in that: The cover plate structure (2) comprises a slide groove (23) symmetrically arranged on the inner surface of the heat preservation barrel (31) at both sides, the inner surfaces of the slide groove (23) and the inner surface of the heat preservation barrel (31) being slidably connected to a yeast placement component (24), the upper end of the yeast placement component (24) being fixedly connected to a top cover (21) tightly attached to the upper end of the heat preservation barrel (31), and a pressure relief component (22) communicating with the lower end of the top cover (21) being arranged in the middle of the upper end.

4. A low-temperature cold storage device for beer fermentation according to claim 2, characterized in that: The circulating cold preservation structure (5) comprises a cooling box (51), the cooling box (51) being located on the right side of the heat preservation barrel (31), the upper left end of the cooling box (51) being fixedly connected to an air return pipe (54) communicating with the inner cavity thereof and communicating with the upper inner surface of the heat preservation barrel (31), the lower left end of the cooling box (51) being fixedly connected to an air supply pipe (52) communicating with the swirl assembly (33), and the lower left end of the cooling box (51) being symmetrically distributed front and rear and fixedly connected to coolant circulation pipes (53) communicating with the input end and the output end of the swirl assembly (33), respectively.

5. The low-temperature cold storage device for beer fermentation according to claim 3, characterized in that: The yeast placement assembly (24) comprises a mounting frame (242) slidably connected to the slide groove (23) and the inner surface of the heat preservation barrel (31); a plurality of cell filter screens (243) are fixedly mounted in an annular arrangement on the inner surface of the mounting frame (242); the inner sides of the plurality of cell filter screens (243) are filled with yeast; cables (241) are symmetrically fixedly connected to the upper ends of the cell filter screens (243) in a front-to-back manner; and the upper ends of the cables (241) are fixedly connected to the lower end of the top cover (21).

6. A low-temperature cold storage device for beer fermentation according to claim 3, characterized in that: The pressure relief component (22) comprises a mounting groove (222) formed at the upper end of the top cover (21); a convex retaining ring (225) is fixedly connected to the bottom wall of the inner cavity of the pressure relief component (22); the middle part of the vertical part of the convex retaining ring (225) is connected to the upper and lower parts; a mesh plate (221) is fixedly connected to the upper part of the inner surface of the mounting groove (222); a compression spring (224) is fixedly connected to the lower end of the mesh plate (221); a buckling cover (223) is fixedly connected to the lower end of the compression spring (224); the buckling cover (223) is buckled with the outer surface of the convex retaining ring (225) and the lower end thereof is in close contact with the upper end of the horizontal part of the convex retaining ring (225).

7. A low-temperature cold storage device for beer fermentation according to claim 6, characterized in that: The upper end of the horizontal portion of the convex baffle ring (225) is filled with sterile water, and the inner surface of the vertical portion of the convex baffle ring (225) is fixedly connected with a molecular sieve 1 (226), wherein the molecular sieve 1 (226) only allows carbon dioxide to pass through.

8. A low-temperature cold storage device for beer fermentation according to claim 4, characterized in that: The swirl assembly (33) comprises a central nozzle (331) rotatably connected to the bottom wall of the inner cavity of the heat preservation barrel (31); the central nozzle (331) is connected to the air supply pipe (52); a plurality of spoiler rods (332) connected to the inner cavity of the central nozzle (331) are fixedly connected to the outer surface of the central nozzle (331) in an annular manner; the spoiler rods (332) are all L-shaped, and their tail ends are fixedly connected to spoiler windmills (333) via connecting ropes; a plurality of cluster nozzles (334) connected to the inner cavity of the central nozzle (331) are linearly distributed and fixedly connected to the outer surfaces of the spoiler rods (332); the cluster nozzles (334) are upwardly inclined, and the inclination direction is opposite to the rotation direction.

9. A low-temperature cold storage device for beer fermentation according to claim 8, characterized in that: The cooling box (51) comprises a cooling chamber (520) located on the upper side and a circulation chamber (511) located on the lower side. A circulation pump (512) is fixedly connected to the bottom wall of the inner cavity of the circulation chamber (511). The circulation pump (512) is divided into two chambers, one of which is connected to the air supply pipe (52). The upper end of the circulation pump (512) is fixedly connected to a connecting pipe 1 (514). The upper end of the connecting pipe 1 (514) passes through the inner cavity top wall of the circulation chamber (511) and extends to the inner wall of the cooling chamber (520) and is fixedly connected to an air storage tank (516) connected to the return air pipe (54). The rear end of the air storage tank (516) is fixedly connected to an exhaust pipe (510) connected to the outside.

10. A low-temperature cold storage device for beer fermentation according to claim 9, characterized in that: Another chamber of the circulation pump (512) is in communication with a cooling liquid circulation pipe (53) located at the output side of the heat exchange tube (32); the input end of the chamber in communication between the circulation pump (512) and the cooling liquid circulation pipe (53) is fixedly connected to a cooling liquid guide pipe (513); the upper end of the cooling liquid guide pipe (513) passes through the inner cavity of the circulation chamber (511) and extends to the inner cavity of the cooling chamber (520) and is fixedly connected to a serpentine pipe (515); the serpentine pipe (515) extends from top to bottom in a serpentine shape and finally passes through the inner cavity bottom wall of the cooling chamber (520) and extends to the inner cavity of the circulation chamber (511) and is connected to the heat exchange tube (32). The cooling liquid circulation pipe (53) on the input side of the heat pipe (32) is connected, and a semiconductor refrigeration plate (517) in close contact with the serpentine tube (515) is fixedly connected to the rear of the inner cavity of the cooling cavity (520), and a plurality of heat dissipation fins are fixedly connected to the hot end of the semiconductor refrigeration plate (517). The top wall of the inner cavity of the circulation cavity (511) is fixedly connected to a filter duct (518) connected to the bottom wall of the inner cavity of the cooling cavity (520), and a fan (519) is fixedly connected to the upper side of the inner surface of the filter duct (518), and the end of the filter duct (518) away from the fan (519) is connected to the outside.

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