A beer fermentation system and a beer fermentation control method

Abstract

The present invention discloses a beer fermentation system and a beer fermentation control method, and belongs to the technical field of beer fermentation. The beer fermentation system includes a fermentation tank and a temperature control component, the fermentation tank includes a tank body and a heat exchange jacket, the barrel body includes a first heat exchange part and a second heat exchange part arranged up and down, the first heat exchange part is provided with an upper expansion joint jacket, the second heat exchange part is provided with a middle expansion joint jacket, the upper expansion joint jacket and the middle expansion joint jacket respectively form a first heat exchange cavity and a second heat exchange cavity with the outer wall surface of the barrel, and the temperature control component is used to provide a refrigerant or a heat medium to the first heat exchange cavity and the second heat exchange cavity. Since the upper expansion joint jacket and the middle expansion joint jacket are both expansion joint structures processed by the expansion joint process, the expansion joint structure can effectively reduce the refrigerant capacity and the heat medium capacity in the heat exchange jacket, while retaining a heat exchange area that is more matched with a small fermentation tank, so that the temperature control of the fermentation tank is more accurate, and the refrigeration inertia and the heating inertia are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of beer fermentation, and in particular to a beer fermentation system and a beer fermentation control method. Background Art

[0002] The fermentation stage of beer is an important stage in beer production. Various controls in the fermentation stage directly affect the quality of the final beer product. Under the current technical level, compared with large beer fermentation systems, small beer fermentation systems have problems such as low control accuracy and large temperature fluctuations in temperature control, and there are specific differences in refrigeration inertia and refrigeration convection.

[0003] For example, the existing small beer fermentation system is mainly composed of two parts: the main tubular fermenter and the matching hot and cold constant temperature cycler. The fermentation tube in the main tubular fermenter is 1.8 meters long and has a volume of 4 liters. The carbon dioxide produced during fermentation can produce a good convection effect on the fermented mash. However, its disadvantage is that different fermentation tubes use the same refrigerant pipeline and different refrigerant paths, which leads to a large amount of refrigerant and heat medium, and causes large temperature fluctuations and errors in fermentation tube temperature control.

[0004] Therefore, how to propose a beer fermentation system that can solve the above problems is a technical problem that urgently needs to be solved. Summary of the invention

[0005] The first object of the present invention is to provide a beer fermentation system, which effectively reduces the capacity of cold and hot media, increases the heat exchange area, accurately controls the temperature, and has low cooling inertia and heating inertia.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A beer fermentation system comprises: a fermentation tank, the fermentation tank comprises a tank body and a heat exchange jacket, the tank body comprises a head, a cylinder body and a conical bottom connected in sequence from top to bottom, the cylinder body comprises a first heat exchange part and a second heat exchange part arranged up and down; the heat exchange jacket comprises an upper expansion joint jacket and a middle expansion joint jacket, the upper expansion joint jacket is sleeved on the first heat exchange part, the middle expansion joint jacket is sleeved on the second heat exchange part, a first heat exchange cavity allowing a refrigerant or a heat medium to flow is formed between the upper expansion joint jacket and the outer wall of the cylinder, the middle expansion joint jacket is sleeved on the second heat exchange part, and a first heat exchange cavity allowing a refrigerant or a heat medium to flow is formed between the upper expansion joint jacket and the outer wall of the cylinder. A second heat exchange chamber allowing the flow of refrigerant or heat medium is formed between the expansion joint jacket and the outer wall of the cylinder; a temperature control component, the temperature control component includes a refrigerant tank and a heat medium tank, the refrigerant tank is provided with refrigerant, the heat medium tank is provided with heat medium, the refrigerant tank is connected with the first heat exchange chamber and the second heat exchange chamber through a refrigerant pipeline to form a refrigerant circuit, the heat medium tank is connected with the first heat exchange chamber and the second heat exchange chamber through a heat medium pipeline to form a heat medium circuit, a refrigerant pump and a refrigerant valve are provided on the refrigerant pipeline, and a heat medium pump and a heat medium valve are provided on the heat medium pipeline.

[0008] Preferably, the heat exchange jacket also includes a lower Miller plate jacket, which is a conical structure and is sleeved on the cone bottom. A third heat exchange chamber allowing the flow of refrigerant or heat medium is formed between the lower Miller plate jacket and the outer wall of the cone bottom. The refrigerant tank is connected to the third heat exchange chamber through the refrigerant pipeline, and the heat medium tank is connected to the third heat exchange chamber through the heat medium pipeline.

[0009] Preferably, the refrigerant pipeline and the heat medium pipeline both include an inlet pipe group and a return pipe group, the inlet pipe group includes an inlet pipe main pipe and a first inlet pipe branch pipe, a second inlet pipe branch pipe and a third inlet pipe branch pipe connected to the outlet of the inlet pipe main pipe at the same time, the inlet of the inlet pipe main pipe is connected to the refrigerant tank or the heat medium tank, the outlet of the first inlet pipe branch pipe is connected to the first heat exchange chamber, the outlet of the second inlet pipe branch pipe is connected to the second heat exchange chamber, and the outlet of the third inlet pipe branch pipe is connected to the third heat exchange chamber; the return pipe group includes a return pipe main pipe and a first return pipe branch pipe, a second return pipe branch pipe and a third return pipe branch pipe connected to the inlet of the return pipe main pipe at the same time, the outlet of the return pipe main pipe is connected to the refrigerant tank or the heat medium tank, the inlet of the first return pipe branch pipe is connected to the first heat exchange chamber, the inlet of the second return pipe branch pipe is connected to the second heat exchange chamber, and the inlet of the third return pipe branch pipe is connected to the third heat exchange chamber; the inlet pipe main pipe is provided with the refrigerant pump or the heat medium pump The refrigerant valve includes a first refrigerant valve, a second refrigerant valve and a third refrigerant valve, the first refrigerant valve is arranged on the first inlet branch of the refrigerant pipeline, the second refrigerant valve is arranged on the second inlet branch of the refrigerant pipeline, and the third refrigerant valve is arranged on the third inlet branch of the refrigerant pipeline; the heat medium valve includes a first heat medium valve, a second heat medium valve and a third heat medium valve, the first heat medium valve is arranged on the first inlet branch of the heat medium pipeline, the second heat medium valve is arranged on the second inlet branch of the heat medium pipeline, and the third heat medium valve is arranged on the third inlet branch of the heat medium pipeline; the first inlet branch, the second inlet branch and the third inlet branch are respectively provided with a first pressure sensor, a second pressure sensor and a third pressure sensor, and the first return branch, the second return branch and the third return branch are respectively provided with a fourth pressure sensor, a fifth pressure sensor and a sixth pressure sensor.

[0010] Preferably, the fermentation tank also includes an insulation layer, which is sleeved on the outside of the tank body; the beer fermentation system also includes a temperature detection mechanism, which includes an upper temperature probe, a middle temperature probe and a lower temperature probe, a first probe of the upper temperature probe passes through the insulation layer and the barrel and is placed inside the barrel, and is used to detect the temperature inside the barrel corresponding to the first heat exchange part, a second probe of the middle temperature probe passes through the insulation layer and the barrel and is placed inside the barrel, and is used to detect the temperature inside the barrel corresponding to the second heat exchange part, and a third probe of the lower temperature probe passes through the insulation layer and the cone bottom and is placed inside the cone bottom, and is used to detect the temperature inside the cone bottom.

[0011] Preferably, the fermentation tank further comprises a head attachment and a cone bottom attachment, the head attachment comprises a head pipe and a liquid supply valve, the cone bottom attachment comprises a cone bottom pipe and a drain valve; the beer fermentation system further comprises a tank washing assembly, the tank washing assembly comprises a CIP supply pump, a CIP return pump, a circulation cleaning valve, a liquid supply pipe, a reflux pipe, a circulation cleaning pipe and a cleaning agent tank; the cleaning agent tank is provided with a cleaning agent, the first port of the head pipe is communicated with the liquid inlet of the head, the cleaning agent tank is communicated with the second port of the head pipe through the liquid supply pipe, the liquid supply valve is arranged at the second port, and the CIP supply pump is arranged on the liquid supply pipe; the first port of the cone bottom pipe is communicated with the liquid outlet of the cone bottom, the second port of the cone bottom pipe is communicated with the cleaning agent tank through the reflux pipe, the CIP return pump is arranged on the reflux pipe, and the drain valve is arranged at the second port; the circulation cleaning pipe is connected between the liquid supply pipe and the reflux pipe, and the circulation cleaning valve is arranged on the circulation cleaning pipe.

[0012] Preferably, the fermentation tank further comprises a barrel accessory, the barrel accessory comprises a barrel sampling valve, the barrel sampling valve is used to sample from the barrel, the cone bottom accessory further comprises a cone bottom sampling valve, the cone bottom sampling valve is used to sample from the cone bottom; the tank washing assembly further comprises two barrel sampling valve cleaning pipes and one cone bottom sampling valve cleaning pipe, one end of one of the barrel sampling valve cleaning pipes is connected to the third port of the head pipe, and the other end is connected to the barrel sampling valve, the other barrel sampling valve cleaning pipe is used to connect the barrel sampling valve and the cone bottom sampling valve, and the cone bottom sampling valve cleaning pipe is used to connect the fourth port of the head pipe and the cone bottom sampling valve; the head accessory further comprises a drain valve and a pressure relief valve, the drain valve is arranged at the fourth port, and the pressure relief valve is arranged at the third port.

[0013] Preferably, the tank washing assembly further comprises a yeast discharge flushing pipe and a yeast discharge flushing valve, wherein one end of the yeast discharge flushing pipe is connected to the inside of the cone bottom, and the other end is connected to the third port of the cone bottom pipe, and the yeast discharge flushing valve is arranged at the third port.

[0014] The second object of the present invention is to provide a beer fermentation control method, which has accurate temperature control and is beneficial to improving the fermentation effect.

[0015] To achieve this object, the present invention adopts the following technical solutions:

[0016] A beer fermentation control method is used to control the above-mentioned beer fermentation system, the beer fermentation control method includes a temperature control process, the temperature control process includes a refrigeration mode, the refrigeration mode has the following steps:

[0017] S11, obtaining the fermentation stage of the beer fermentation system, and determining the temperature setting value and the refrigeration offset value of the fermentation stage;

[0018] S12, determining at least one of the first heat exchange portion of the cylinder, the second heat exchange portion of the cylinder, and the conical bottom as a temperature control area in the fermentation tank;

[0019] S13, obtaining the real-time temperature of the temperature control area, and determining whether the real-time temperature of the temperature control area is greater than the sum of the temperature setting value and the cooling offset value;

[0020] If the real-time temperature of the temperature control area is greater than the sum of the temperature setting value and the cooling offset value, the refrigerant pump is started, the refrigerant valve is opened, and the opening of the refrigerant valve is adjusted according to the inlet and outlet pressure difference of the temperature control area so that the amount of refrigerant in the first heat exchange chamber, the second heat exchange chamber and the third heat exchange chamber is a preset value.

[0021] Preferably, the beer fermentation control method includes a pressure control process, and the pressure control process includes the following steps:

[0022] S21, obtaining the fermentation stage of the beer fermentation system, and determining the upper and lower pressure limits of the fermentation stage;

[0023] S22, obtaining the real-time pressure inside the fermentation tank;

[0024] Determine whether the real-time pressure is greater than the upper pressure limit. If the real-time pressure is greater than the upper pressure limit, start the pressure relief valve for a preset time until the real-time pressure is equal to the lower pressure limit;

[0025] Determine whether the real-time pressure is less than the upper pressure limit. If the real-time pressure is less than the upper pressure limit, close the pressure relief valve, open the liquid supply valve, and open the CO2 supply valve connected to the upstream of the liquid supply valve for a preset time until the real-time pressure is equal to the upper pressure limit.

[0026] Preferably, the beer fermentation control method includes a yeast discharge process, and the yeast discharge process specifically includes the following steps:

[0027] S31, obtaining the fermentation stage of the beer fermentation system, and determining the pre-discharge flushing type, pre-discharge flushing time, pre-discharge emptying time, single discharge time, discharge number, discharge delay, post-discharge flushing type, post-discharge flushing time, and post-discharge emptying time corresponding to the fermentation stage;

[0028] S32, perform pre-drainage flushing:

[0029] S321, selecting a flushing medium according to the pre-flush type;

[0030] S322, open the yeast discharge flushing valve, the CIP station provides flushing medium for flushing, the flushing time is equal to the flushing time before discharge, and at the same time open the sewage valve, the sewage discharge time is equal to the emptying time before discharge;

[0031] S323, closing the yeast discharge flushing valve, and closing the sewage valve;

[0032] S33, performing yeast discharge:

[0033] S331, opening the cone bottom valve disposed at the liquid outlet of the cone bottom, the opening time being equal to the single discharge time;

[0034] S332, closing the cone bottom valve;

[0035] S34, perform post-drainage flushing:

[0036] S341, selecting a flushing medium according to the post-drainage flushing type;

[0037] S342, the yeast discharge flushing valve is opened, and the CIP station provides flushing medium for flushing, and the flushing time is equal to the flushing time after discharge. At the same time, the sewage valve is opened, and the sewage discharge time is equal to the emptying time after discharge;

[0038] S343, closing the yeast discharge flushing valve, and closing the sewage valve;

[0039] S35. Repeat the above S31, S32, S33 and S34 according to the number of discharges.

[0040] Preferably, the beer fermentation control method includes a flushing process, and the flushing process includes the following steps:

[0041] S41, selecting a cleaning step, and determining the total cleaning time, drain valve cleaning time, drain valve cleaning times, and drain valve cleaning interval corresponding to the cleaning step;

[0042] S42, select a cleaning agent tank, open the cleaning agent tank supply valve, liquid supply valve and CIP supply pump, and the cleaning agent in the cleaning agent tank enters the tank body through the liquid supply pipe for cleaning;

[0043] S43, close the cleaning agent tank supply valve and the cleaning agent tank return valve, open the cone bottom valve, CIP return pump and circulation cleaning valve, and the cleaning agent in the tank body flows back into the tank body through the reflux pipe, the circulation cleaning pipe and the liquid supply pipe for circulation cleaning, and the circulation cleaning time is equal to the total cleaning time.

[0044] Preferably, step S42 also includes the following steps:

[0045] Valve body cleaning:

[0046] S421, the cleaning agent in the cleaning agent tank sequentially passes through the pressure relief valve, one of the cylinder sampling valve cleaning pipes, the cylinder sampling valve, another cylinder sampling valve cleaning pipe and the cone bottom sampling valve into the cone bottom; at the same time, the cleaning agent in the cleaning agent tank sequentially passes through the drain valve, the cone bottom sampling valve cleaning pipe and the cone bottom sampling valve into the cone bottom, and the valve body cleaning time is equal to the drain valve cleaning time;

[0047] S422, closing the drain valve and the pressure relief valve, and the closing time is equal to the drain valve cleaning interval;

[0048] S423, repeat step S421 and step S422, the number of repetitions being equal to the number of times the drain valve is cleaned.

[0049] Beneficial effects of the present invention:

[0050] The present invention provides a beer fermentation system, wherein the first heat exchange part of the barrel of the beer fermentation system is provided with an upper expansion joint jacket, and the second heat exchange part of the barrel is provided with a middle expansion joint jacket. Since both the upper expansion joint jacket and the middle expansion joint jacket are expansion joint structures processed by the expansion joint process, the expansion joint structure can effectively reduce the refrigerant capacity and the heat medium capacity in the heat exchange jacket, while retaining a heat exchange area that is more matched with a small fermentation tank, so that the temperature control of the fermentation tank is more accurate, and the refrigeration inertia and heating inertia are reduced. In addition, the design of the expansion joint jacket can effectively prevent the small fermentation tank from being overcooled and the temperature control being inaccurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic diagram of the structure of a fermentation tank provided in an embodiment of the present invention;

[0052] Figure 2 is a cross-sectional view of a fermentation tank provided by an embodiment of the present invention;

[0053] Figure 3 This is a schematic diagram of the internal structure of the fermentation tank provided by the embodiment of the present invention after the insulation layer is removed;

[0054] Figure 4 It is a dimension diagram of the upper expansion joint jacket provided in an embodiment of the present invention;

[0055] Figure 5 It is a structural schematic diagram of a head and head accessories of a fermentation tank provided in an embodiment of the present invention;

[0056] Figure 6 is a schematic diagram of the external structure of the upper temperature probe provided in an embodiment of the present invention;

[0057] Figure 7 Schematic diagram of the internal structure of the upper temperature probe provided in an embodiment of the present invention;

[0058] Figure 8 is a schematic diagram of the external structure of a dissolved oxygen probe provided in an embodiment of the present invention;

[0059] Fig. 9 Schematic diagram of the internal structure of the dissolved oxygen probe provided in an embodiment of the present invention;

[0060] Fig.10 It is a temperature control interface diagram of a control mechanism in a beer fermentation control method provided by an embodiment of the present invention;

[0061] Fig.11 It is a pressure control interface diagram of a control mechanism in a beer fermentation control method provided by an embodiment of the present invention;

[0062] Fig.12 It is a yeast emission control interface diagram of a control mechanism in a beer fermentation control method provided by an embodiment of the present invention;

[0063] Fig.13 It is a diagram of a flushing control interface of a control mechanism in a beer fermentation control method provided in an embodiment of the present invention.

[0064] In the figure:

[0065] 1. Head; 2. Cylinder; 3. Cone bottom; 4. Upper expansion joint jacket; 5. Middle expansion joint jacket; 6. Lower Miller plate jacket; 7. Insulation layer;

[0066] 8. Upper temperature probe; 801. First probe; 802. Internal thread seat of temperature probe; 803. Nut seat of temperature probe; 804. External thread sleeve of temperature probe;

[0067] 9. Middle temperature probe; 10. Lower temperature probe; 11. End pipe; 12. Liquid supply valve; 13. Drain valve; 14. Pressure relief valve; 15. Pressure gauge; 16. End sight glass; 17. Flange; 18. Cylinder sampling valve; 19. Cone bottom sampling valve; 20. Cone bottom valve; 21. Drain valve; 22. Yeast discharge flushing valve; 23. Cone bottom pipe; 24. Breathing valve; 25. End insulation cover;

[0068] 26. Dissolved oxygen probe; 2601. Dissolved oxygen probe; 2602. Dissolved oxygen probe internal thread seat; 2603. Dissolved oxygen probe nut seat; 2604. Dissolved oxygen probe external thread sleeve. DETAILED DESCRIPTION

[0069] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable 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 internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] This embodiment provides a beer fermentation system, which includes a fermentation tank, a temperature control component, a fermentation tank accessory, a tank washing component and a control mechanism. The fermentation tank is the main place for beer fermentation, and the number of fermentation tanks can be set according to demand, and each fermentation tank includes a tank body and a heat exchange jacket.

[0073] Specifically, Figures 1 to 3 As shown, the tank body includes a head 1, a cylinder 2 and a cone bottom 3 connected in sequence from top to bottom, and the inner wall surface of the head 1, the inner wall surface of the cylinder 2 and the inner wall surface of the cone bottom 3 are enclosed to form a closed fermentation space. In this embodiment, the head 1 is a hemispherical structure with an open bottom, the cylinder 2 is a cylindrical structure, and the cone bottom 3 is a funnel-shaped structure. The head 1, the cylinder 2 and the cone bottom 3 are detachably connected by a flange 17. Such a setting is convenient for deep cleaning and equipment inspection in special circumstances. For example, when the fermentation tank needs to be deeply disassembled and cleaned, the tank is opened to deeply clean the dead corners and observe the cleaning effect. The head 1, the cylinder 2 and the cone bottom 3 are made of 2mm-4mm food-grade stainless steel, and the polishing roughness of the inner wall of the cylinder 2, the cone bottom 3 and the head 1 is ≤0.6μm. The taper of the cone bottom 3 is ≤60 to promote better sedimentation of yeast and better convection of the fermentation liquid during the fermentation process. In addition, the thickness of the cylinder 2, the cone bottom 3 and the head 1 needs to ensure that no convex marks are left on the inner wall when the heat exchange jacket or the fermentation tank accessories are welded, and meet the requirements of the inner wall polishing roughness, thereby reducing the risk of microbial contamination. The specific values ​​of the thickness of the cylinder 2, the cone bottom 3 and the head 1 are not limited here and can be flexibly set according to needs.

[0074] The fermentation tank accessories include head accessories, cylinder accessories and cone bottom accessories. Figure 5 As shown, the end cap accessories include an end cap tube 11, a rotating cleaning ball, a pressure gauge 15, an emptying valve 13, a pressure relief valve 14, a liquid supply valve 12, a breathing valve 24 and an end cap sight glass 16. Among them, the end cap tube 11 is a five-way tube, which includes five ports: a first port, a second port, a third port, a fourth port and a fifth port. The end cap 1 is provided with a liquid inlet connected to the fermentation space, and the first port of the end cap tube 11 is connected to the liquid inlet. The liquid supply valve 12 is arranged at the second port and is used to control the opening and closing of the second port. The pressure relief valve 14 is arranged at the third port and is used to control the opening and closing of the third port. The emptying valve 13 is arranged at the fourth port and is used to control the opening and closing of the fourth port. In the fermentation tank flushing process, the pressure relief valve 14 and the emptying valve 13 can be connected to the cleaning pipeline and are used to clean the fermentation tank sampling valve and the oxygen filling valve. The end cap sight glass 16 is arranged on the end cap 1, which is used by the staff to observe the fermentation process in the tank body. Specifically, there are scraper structures and red light lamps in the head sight glass 16. The scraper structure can scrape off the condensed water droplets on the head sight glass 16 during the tank cooling process, which is convenient for observing the fermentation situation. The red light lamp can be used for observation when the light is insufficient, which is convenient for observation and reduces the conversion effect of ultraviolet rays on the hop components of beer. The pressure gauge 15 is set at the fifth port. When the liquid supply valve 12 is opened, the value displayed by the pressure gauge 15 is the tank washing pressure. The breathing valve 24 is set on the head 1. The breathing valve 24 and the pressure gauge 15 play an important role in fermentation pressure control and negative pressure protection. The rotating cleaning ball can be rotatably arranged inside the head 1. In the fermentation tank flushing process, the CIP pump and the pressure gauge 15 that provide power for the liquid supply valve 12 to enter the liquid can ensure that the rotating cleaning ball operates in the best working condition according to the PID control. Optionally, 6-9 holes with a diameter of 1 mm are evenly distributed at the welding point between the pipeline above the rotating cleaning ball and the head 1. The rotating cleaning ball is close to the welding point of the head 1, so that the surface of the head 1 can be cleaned more thoroughly when the fermentation tank is cleaned. At the same time, the setting of the holes can better discharge CO2 in the tank body during the normal pressure fermentation stage in the initial stage of fermentation.

[0075] The cylinder attachment includes a cylinder sampling valve 18, and the sampling conduit of the cylinder sampling valve 18 passes through the side wall of the cylinder 2 from the outside of the cylinder 2 and is placed inside the cylinder 2, which is used to take samples from the inside of the cylinder 2, so as to facilitate sampling and detection. The cone bottom attachment includes a cone bottom sampling valve 19, a cone bottom pipe 23 and a blowdown valve 21, wherein the sampling conduit of the cone bottom sampling valve 19 passes through the side wall of the cone bottom 3 from the outside of the cone bottom 3 and is placed inside the cone bottom 3, which is used to take samples from the inside of the cone bottom 3, so as to facilitate sampling and detection. The cone bottom pipe 23 is a three-way pipe, which includes three openings, namely, a first port, a second port and a third port. The bottom of the cone bottom 3 is provided with a liquid outlet connected to the fermentation space. The first port of the cone bottom pipe 23 is connected to the liquid outlet. The blowdown valve 21 is arranged at the second port and is used to control the opening and closing of the second port. In addition, in this embodiment, the sampling conduits of the cylinder sampling valve 18 and the cone bottom sampling valve 19 both use the same inner diameter as the valve core of the sterile sampling valve, thereby reducing yeast residues in the sampling valve conduits and improving the representativeness of the sampling.

[0076] In this embodiment, the height-to-diameter ratio of the fermentation tank body is the ratio of the use height to the inner diameter of the tank body. The use height specifically refers to the volume below the lower edge of the rotating cleaning ball as the full volume, and the length from the actual use liquid level position to the opening of the cone bottom 3 with a filling coefficient of 55%-65% as the height. In this embodiment, the use height-to-diameter ratio needs to be ensured to be within the range of 1.7-2.9.

[0077] In order to achieve accurate temperature control of the fermentation tank, Figure 2 and Figure 3 As shown, the cylinder 2 includes a first heat exchange part and a second heat exchange part arranged in an upper and lower manner. The heat exchange jacket includes an upper expansion joint jacket 4 and a middle expansion joint jacket 5. The upper expansion joint jacket 4 is sleeved on the first heat exchange part, and the middle expansion joint jacket 5 is sleeved on the second heat exchange part. A first heat exchange cavity allowing the flow of refrigerant or heat medium is formed between the upper expansion joint jacket 4 and the outer wall of the cylinder 2, and a second heat exchange cavity allowing the flow of refrigerant or heat medium is formed between the middle expansion joint jacket 5 and the outer wall of the cylinder 2. It should be noted that both the upper expansion joint jacket 4 and the middle expansion joint jacket 5 are expansion joint structures processed by the expansion joint process. The expansion joint structure can effectively reduce the cold / heat medium capacity in the heat exchange jacket, while retaining a heat exchange area that is more matched to a small fermentation tank, so that the temperature control of the fermentation tank is more accurate and the cooling / heating inertia is reduced. Compared with the prior art, the beer fermentation system provided in this embodiment can effectively prevent the occurrence of excessive cooling and inaccurate temperature control of small fermentation tanks through the design of the expansion joint jacket.

[0078] Specifically, Figure 4The figure shows the longitudinal section of the upper expansion joint jacket 4 or the middle expansion joint jacket 5. In this embodiment, the upper expansion joint jacket 4 and the middle expansion joint jacket 5 use a vertical single-layer thickness of 1.5mm with a straight-edge annular butt joint single-layer fatigue design, meet PN0.6Mpa, and are made of S30408 ​​or S30403 material. Each parameter meets q=0.09*D 发酵罐 , h=q / 5,2m e =3m i , r ir =r ic The volume of the upper expansion joint jacket 4 is 1.5%-2.5% of the effective volume, and the volume of the middle expansion joint jacket 5 is 1.0%-2.0% of the effective volume. The cooling area of ​​the upper expansion joint jacket 4 accounts for 15%-25% of the sum of the surface areas of the cylinder 2 and the vertebral body, and the cooling area of ​​the middle expansion joint jacket 5 accounts for 10%-20% of the sum of the surface areas of the cylinder 2 and the vertebral body. The corresponding value setting of the cold / hot medium flow rate and the cold / hot medium inlet and outlet pressure difference is calibrated by running a single fermentation tank heat exchange jacket to accurately control the working conditions of each fermentation tank heat exchange jacket.

[0079] Continue to refer to Figure 2 and Figure 3 As shown, the heat exchange jacket also includes a lower Miller plate jacket 6, which is a conical structure. The lower Miller plate jacket 6 is sleeved on the cone bottom 3, and a third heat exchange cavity is formed between the lower Miller plate jacket 6 and the outer wall of the cone bottom 3 to allow the flow of refrigerant or heat medium. The lower Miller plate jacket 6 is a conical structure made of Miller plate, which is an existing plate material, and the volume of the lower Miller plate cooling jacket is 1.0-3.0% of the effective volume. Compared with the upper expansion joint jacket 4 and the middle expansion joint jacket 5, the capacity of the lower Miller plate jacket 6 is slightly larger, and its larger capacity can effectively improve the cooling rate of the fermenter during cold storage. It should be noted that when installing the lower Miller plate jacket 6, it is required to ensure that the installation position is as close to the cone bottom 3 as possible. The lower Miller plate cooling jacket is close to the cone bottom 3, which reduces the heat transfer of the cone bottom 3 during fermentation temperature control.

[0080] Furthermore, the fermentation tank also includes an insulation layer 7, which is sleeved on the outside of the tank body. The insulation layer 7 covers the small fermentation tank to the maximum extent possible. At the same time, through the corresponding unique design, it does not affect the use and maintenance of each tank body accessory. The use of the insulation layer 7 can reduce the uneven temperature distribution of the fermentation tank caused by incomplete insulation. Furthermore, a head insulation sleeve 25 is also provided on the outside of the head 1. The provision of the head insulation sleeve 25 reduces the heat loss of the traditional small fermentation tank during cold storage.

[0081] Furthermore, the beer fermentation system also includes a temperature detection mechanism, which includes an upper temperature probe 8, a middle temperature probe 9 and a lower temperature probe 10. The first probe 801 of the upper temperature probe 8 passes through the insulation layer 7 and the barrel 2 and is placed inside the barrel 2, and is used to detect the temperature inside the barrel 2 corresponding to the first heat exchange part. The second probe of the middle temperature probe 9 passes through the insulation layer 7 and the barrel 2 and is placed inside the barrel 2, and is used to detect the temperature inside the barrel 2 corresponding to the second heat exchange part. The third probe of the lower temperature probe 10 passes through the insulation layer 7 and the cone bottom 3 and is placed inside the cone bottom 3, and is used to detect the temperature inside the cone bottom 3.

[0082] The structures of the upper temperature probe 8, the middle temperature probe 9 and the lower temperature probe 10 are the same. In this embodiment, the structures of the three temperature probes are introduced by taking the upper temperature probe 8 as an example. Figure 6 and Figure 7 As shown, the upper temperature probe 8 includes a first probe 801, a temperature probe internal thread seat 802, a temperature probe nut seat 803, a temperature probe silicone gasket and a temperature probe external thread sleeve 804. The temperature probe internal thread seat 802 is connected to the insulation layer 7 by welding, a limited step surface is arranged in the internal thread hole of the temperature probe internal thread seat 802, one end of the first probe 801 is fixedly connected to the temperature probe nut seat 803, the temperature probe external thread sleeve 804 is sleeved on the first probe 801, and an extrusion surface is arranged on the end of the temperature probe external thread sleeve 804 away from the temperature probe nut seat 803, the extrusion surface is a conical surface, and the temperature probe silicone gasket is sleeved on the first probe 801 and located at the extrusion surface. When the upper temperature probe 8 is installed on the fermentation tank, the temperature probe external thread sleeve 804 enters the temperature probe internal thread seat 802, and the temperature probe silicone gasket is squeezed between the extrusion surface and the limit step surface, and the free end of the first probe 801 passes through the barrel 2 and enters the inside of the barrel 2, thereby detecting the temperature at the first heat exchange part in the barrel 2. The above three temperature probes can not only realize the accurate detection of the temperature in the barrel 2 and the cone bottom 3, but also form a good seal with the fermentation tank without leakage problems, avoiding the problem of small fermentation tanks being exposed to the air too much due to the traditional opening method of the insulation layer 7, which affects the cold storage temperature control.

[0083] The temperature control component is mainly used to provide refrigerant and heat medium, as well as to control the refrigerant and heat medium. It can also configure a separate refrigeration system or a dual refrigeration and heating system for temperature control according to environmental needs to meet the temperature control requirements of different scenarios. The temperature control component includes a refrigeration module and a heating module. When the fermentation temperature is lower than the ambient temperature, the refrigeration module is enabled for temperature control. The automatic program performs frequency conversion control on the refrigerant pump according to the pressure of the refrigerant pipeline. When the fermentation temperature is higher than the ambient temperature, the heating module is started. When the refrigeration module and the heating module switch between each other, there is a top cooling / heating medium mode to avoid a large amount of cold / heating medium mixing. There is a conductivity detector in the heat medium tank. When a certain conductivity is reached, the heat medium tank will no longer heat, and the heat medium replacement program needs to be executed. It can only be used normally when the conductivity is lower than the set value.

[0084] Specifically, the temperature control component includes a refrigerant tank and a heat medium tank, and the refrigerant is arranged in the refrigerant tank, and the refrigerant tank is connected with the first heat exchange cavity, the second heat exchange cavity and the third heat exchange cavity through the refrigerant pipeline to form a refrigerant circuit. Heat medium is arranged in the heat medium tank, and the heat medium tank is connected with the first heat exchange cavity, the second heat exchange cavity and the third heat exchange cavity through the heat medium pipeline to form a heat medium circuit. A refrigerant pump and a refrigerant valve are arranged on the refrigerant pipeline, and a heat medium pump and a heat medium valve are arranged on the heat medium pipeline. In addition, the temperature control component also includes a Freon refrigerator, a refrigeration copper pipe, a refrigerant tank pneumatic stirring pump, a heat medium tank pneumatic stirring pump, and a PTC heater. The refrigerant tank should be arranged as close to the Freon refrigerator as possible, and the Freon refrigerator cools the refrigerant through the refrigeration copper pipe. The heat medium tank uses a PTC heater to heat the heat medium. The pneumatic stirring pump of the refrigerant tank is linked with the refrigerant pump to avoid the uneven temperature distribution of the refrigerant tank in the small fermentation system, which causes the fermentation tank to be too cold and freeze. At the same time, the pneumatic stirring pump can prevent certain refrigerants from volatilizing to the flash point and causing combustion and explosion. The pneumatic stirring pump of the heat medium tank is linked with the heat medium pump to avoid the aging of the fermentation liquid or the damage of the yeast activity caused by the uneven temperature distribution of the heat medium tank. At the same time, the safety performance characteristics of the PTC heater and the use of the pneumatic stirring pump can avoid the risk of combustion and explosion caused by the cross-talk of cold and hot media due to system failure. Optionally, a tank insulation layer is provided outside the refrigerant tank and the heat medium tank, and a pipeline insulation layer is provided on the refrigerant pipeline and the heat medium pipeline to minimize heat loss.

[0085] In this embodiment, the refrigerant pipeline and the heat medium pipeline have the same structure, and both include an inlet pipe group and a return pipe group. Specifically, the inlet pipe group includes an inlet pipe main pipe and a first inlet pipe branch pipe, a second inlet pipe branch pipe, and a third inlet pipe branch pipe that are simultaneously connected to the outlet of the inlet pipe main pipe, the inlet of the inlet pipe main pipe is connected to the refrigerant tank or the heat medium tank, the outlet of the first inlet pipe branch pipe is connected to the first heat exchange chamber, the outlet of the second inlet pipe branch pipe is connected to the second heat exchange chamber, and the outlet of the third inlet pipe branch pipe is connected to the third heat exchange chamber. The return pipe group includes a return pipe main pipe and a first return pipe branch pipe, a second return pipe branch pipe, and a third return pipe branch pipe that are simultaneously connected to the inlet of the return pipe main pipe, the outlet of the return pipe main pipe is connected to the refrigerant tank or the heat medium tank, the inlet of the first return pipe branch pipe is connected to the first heat exchange chamber, the inlet of the second return pipe branch pipe is connected to the second heat exchange chamber, and the inlet of the third return pipe branch pipe is connected to the third heat exchange chamber.

[0086] A refrigerant pump or a heat medium pump is provided on the inlet main pipe. Optionally, the refrigerant pump and the heat medium pump adopt frequency conversion control to facilitate the stability of the cold / heat medium flow and energy saving under different temperature control conditions. The refrigerant valve includes a first refrigerant valve, a second refrigerant valve and a third refrigerant valve. The first refrigerant valve is arranged on the first inlet branch of the refrigerant pipeline, the second refrigerant valve is arranged on the second inlet branch of the refrigerant pipeline, and the third refrigerant valve is arranged on the third inlet branch of the refrigerant pipeline. The heat medium valve includes a first heat medium valve, a second heat medium valve and a third heat medium valve. The first heat medium valve is arranged on the first inlet branch of the heat medium pipeline, the second heat medium valve is arranged on the second inlet branch of the heat medium pipeline, and the third heat medium valve is arranged on the third inlet branch of the heat medium pipeline.

[0087] In addition, taking the refrigerant pipeline as an example, a main pipe pressure sensor is provided on the inlet main pipe of the refrigerant pipeline, and a first pressure sensor, a second pressure sensor, and a third pressure sensor are provided on the first inlet branch pipe, the second inlet branch pipe, and the third inlet branch pipe of the refrigerant pipeline in a one-to-one correspondence. A main pipe flow meter is provided on the return main pipe of the refrigerant pipeline, and a fourth pressure sensor, a fifth pressure sensor, and a sixth pressure sensor are provided on the first return branch pipe, the second return branch pipe, and the third return branch pipe of the refrigerant pipeline in a one-to-one correspondence. The setting of the pressure sensor on the heat medium pipeline is the same as that on the refrigerant pipeline, and will not be repeated here.

[0088] By using the cooperation of three temperature probes and the above-mentioned temperature control components, the opening of the regulating valve corresponding to the inlet and outlet pressure difference of the equipment is set through the flow data of the cold / hot medium main pipe of the single jacket operation, which can ensure that the cold / hot medium flow of the corresponding heat exchange jackets of different fermenters in the fermentation system is consistent, thereby accurately controlling the convection intensity of the fermenter temperature control process.

[0089] Furthermore, the beer fermentation system also includes a tank washing assembly, which can realize automatic cleaning of the tank body, so that the fermentation tank reaches a high level of sterility, so that the mature fermentation liquid can be tested for non-biological stability after filling.

[0090] Specifically, the tank cleaning assembly includes a CIP supply pump, a CIP return pump, a circulating cleaning valve, a liquid supply pipe, a cleaning agent tank supply valve, a cone bottom valve 20, a reflux pipe, a circulating cleaning pipe, a cleaning agent tank return valve and a cleaning agent tank. The cleaning agent tank is provided with a cleaning agent, and the cleaning agent can be selected from clean water, alkaline water or hot water according to needs, that is, multiple cleaning agent tanks containing different cleaning agents can be provided, and different cleaning agent tanks can be selected to provide cleaning agents in different cleaning steps of the flushing process. In this embodiment, the cleaning process includes five types: pre-cleaning, alkaline top water, alkaline circulation, water top alkali and hot water flushing.

[0091] Specifically, the cleaning agent tank is connected to the second port of the head pipe 11 through a liquid supply pipe, a cleaning agent tank supply valve is provided at the cleaning agent outlet of the cleaning agent tank, and the outflow and stop of the cleaning agent in the cleaning agent tank can be controlled by opening and closing the cleaning agent tank supply valve, and the CIP supply pump is provided on the liquid supply pipe. When the cleaning agent tank supply valve, the CIP supply pump and the liquid supply valve 12 provided at the second port are opened at the same time, the cleaning agent in the cleaning agent tank can enter the tank body through the liquid supply pipe to clean the tank body.

[0092] The cone bottom valve 20 is arranged at the first port of the cone bottom pipe 23. Specifically, the upper end of the cone bottom valve 20 is welded to the tank bottom, and the lower end is a quick-release chuck. The cone bottom valve 20 is a ball valve of the same diameter as the sewage pipe arranged at the outlet of the cone bottom 3. This structural design has better heat insulation performance, which can effectively reduce the heat transfer of the cone bottom pipe 23 of the traditional small fermentation tank and reduce the bad flavor caused by yeast autolysis. The quick-release chuck at the lower end of the cone bottom valve 20 is connected to the equal-diameter tee, the inner end is connected to the yeast discharge flushing valve 22 and the pipeline, and the outer end is connected to the sewage discharge and feed pipeline of the sewage valve 21. The second port of the cone bottom pipe 23 is connected to the cleaning agent tank through the reflux pipe. The cleaning agent tank return valve is arranged at the cleaning agent return port connected to the cleaning agent tank, and the CIP return pump is arranged on the reflux pipe. When the cone bottom valve 20, the sewage valve 21 arranged at the second port, the CIP return pump and the cleaning agent tank return valve are opened at the same time, the cleaning agent in the tank body can flow back into the cleaning agent tank.

[0093] A circulating cleaning pipe is connected between the liquid supply pipe and the return pipe, and a circulating cleaning valve is arranged on the circulating cleaning pipe. The circulating cleaning pipe is arranged in parallel with the cleaning agent tank. When the circulating cleaning valve is opened and the cleaning agent tank return valve and the cleaning agent tank supply valve are closed, the cleaning agent in the tank body is discharged from the cone bottom valve 20 and the drain valve 21, flows from the return pipe into the circulating cleaning pipe, and flows from the circulating cleaning pipe into the liquid supply pipe again, and then flows back into the tank body again, thus realizing circulating cleaning.

[0094] Furthermore, the beer fermentation system can also realize automatic cleaning of the sampling valve, specifically, automatic cleaning of the barrel sampling valve 18 and the cone bottom sampling valve 19. Specifically, the tank washing assembly also includes two barrel sampling valve cleaning pipes and one cone bottom sampling valve cleaning pipe, one end of which is detachably connected to the third port of the head pipe 11, and the other end of the barrel sampling valve cleaning pipe is detachably connected to the barrel sampling valve 18, and the other barrel sampling valve cleaning pipe is used to connect the barrel sampling valve 18 and the cone bottom sampling valve 19, and the connection method is detachable. The cone bottom sampling valve cleaning pipe is used to connect the fourth port of the head pipe 11 and the cone bottom sampling valve 19, and the connection method is also detachable. More specifically, the two ends of the cylinder sampling valve cleaning pipe are quick-mounted clips. During the flushing process, the quick-mounted clips at both ends of one cylinder sampling valve cleaning pipe are respectively connected to the quick-mounted joint of the pressure relief valve 14 and the upper end joint of the cylinder sampling valve 18, and the quick-mounted clips at both ends of the other cylinder sampling valve cleaning pipe are respectively connected to the quick-mounted joint at the lower end of the pressure relief valve 14 and the upper end joint of the cone bottom sampling valve 19. Both ends of the cone bottom sampling valve cleaning pipe are quick-mounted clips, one of which is connected to the quick-mounted joint of the drain valve 13, and the other is connected to the lower end joint of the cone bottom sampling valve 19.

[0095] When the tank body is automatically cleaned, if the drain valve 13 and the pressure relief valve 14 are opened, the cleaning agent in the cleaning agent tank or the tank body can enter the cone bottom sampling valve 19 through the drain valve 13 and the cone bottom sampling valve cleaning pipe for cleaning, and then flow back to the cone bottom 3 again; at the same time, the cleaning agent in the cleaning agent tank or the tank body can enter the cone bottom 3 through the pressure relief valve 14, one of the cylinder sampling valve cleaning pipes, the cylinder sampling valve 18, the other cylinder sampling valve cleaning pipe and the cone bottom sampling valve 19, and the cylinder sampling valve 18 and the cone bottom sampling valve 19 are automatically cleaned in this process.

[0096] Furthermore, a CIP station heater is provided on the liquid inlet pipe, which is used to heat the cleaning agent in the liquid inlet pipe. A CIP station temperature probe is also provided on the liquid inlet pipe, which is used to detect the temperature of the cleaning agent in the liquid inlet pipe. The cooperation of the CIP station heater and the CIP station temperature probe can realize the precise control of the cleaning agent temperature.

[0097] Furthermore, the tank washing assembly also includes a cone bottom cleaning pipe and a cone bottom cleaning valve. One end of the cone bottom cleaning pipe is connected to the liquid supply pipe, and the connection point is specifically located between the CIP station temperature probe and the CIP station heater. The other end of the cone bottom cleaning pipe is connected to the inside of the cone bottom 3, and the cone bottom cleaning valve is arranged on the cone bottom cleaning pipe. A CIP fermentation tank cleaning valve is also arranged on the liquid inlet pipe downstream of the connection point. By controlling the CIP fermentation tank cleaning valve and the cone bottom cleaning valve, the flow direction of the cleaning agent can be controlled, so that the cleaning agent can flow into the tank body from the head 1 according to demand to calmly clean the tank body, or flow into the cone bottom 3 from the cone bottom 3 to clean the cone bottom 3.

[0098] Furthermore, the tank washing assembly also includes a yeast discharge flushing pipe and a yeast discharge flushing valve 22. One end of the yeast discharge flushing pipe is connected to the inside of the cone bottom 3, and the other end is connected to the third port of the cone bottom pipe 23, and the yeast discharge flushing valve 22 is arranged at the third port. It should be noted that when the yeast discharge flushing valve 22, the drain valve 21 and the cone bottom valve 20 are installed on the cone bottom pipe 23, the valve interval should be reduced as much as possible under the condition that the installation is feasible, and then cooperate with the fermentation automatic yeast discharge program, which can effectively reduce the yeast odor generated by the fermentation of small fermentation tanks. Furthermore, the cone bottom pipe 23 adopts an equal-diameter three-way pipe, and the volume of the interval between the equal-diameter three-way pipe and the three valve cores of the yeast discharge flushing valve 22, the drain valve 21 and the cone bottom valve 20 is fixed, so that when approaching the end of the main fermentation, the automatic discharge of yeast can be realized through the cooperation of the automatic program and the three valves of the cone bottom 3, while reducing the labor intensity of the brewer and the researcher, the consistency of the fermentation process operation is increased.

[0099] In order to detect the pH value in the fermentation tank, the beer fermentation system also includes a pH probe. The pH probe of the pH probe passes through the insulation layer 7 and the barrel 2 and is placed inside the barrel 2, and is used to detect the pH value inside the barrel 2. Specifically, the pH probe includes a pH probe, a pH probe internal thread seat, a pH probe nut seat, a pH probe silicone gasket and a pH probe external thread sleeve. Among them, the pH probe internal thread seat is connected to the insulation layer 7 by welding, a limited step surface is arranged in the internal thread hole of the pH probe internal thread seat, one end of the pH probe is fixedly connected to the pH probe nut seat, the pH probe external thread sleeve is sleeved on the pH probe, and an extrusion surface is arranged on the end of the pH probe external thread sleeve away from the pH probe nut seat, and the extrusion surface is a conical surface, and the pH probe silicone gasket is sleeved on the pH probe and located at the extrusion surface. When the pH probe is installed on the fermentation tank, the pH probe external thread sleeve enters the pH probe internal thread seat, and squeezes the pH probe silicone gasket between the extrusion surface and the limited step surface, and the free end of the pH probe passes through the barrel 2 and enters the inside of the barrel 2, thereby detecting the pH in the barrel 2. The pH probe can not only accurately detect the pH in the cylinder 2, but also form a good seal with the fermentation tank, so that leakage does not occur, thereby avoiding the problem that a small fermentation tank is exposed to the air in a large area due to the opening of the traditional insulation layer 7, which affects the cold storage temperature control. In addition, the connection between the pH probe and the fermentation tank does not need to be disassembled during cleaning, which is convenient for cleaning and reduces the labor intensity of the staff.

[0100] In order to detect the dissolved oxygen content in the fermentation tank, the beer fermentation system further includes a dissolved oxygen probe 26. The dissolved oxygen probe 2601 of the dissolved oxygen probe 26 passes through the insulation layer 7 and the cylinder 2 and is placed inside the cylinder 2, and is used to detect the dissolved oxygen content inside the cylinder 2. In this embodiment, the dissolved oxygen probe 26 uses a fluorescence method to detect, which improves the reliability of dissolved oxygen detection and the service life of the probe. Specifically, Figure 8 and Fig. 9 As shown, the dissolved oxygen probe 26 includes a dissolved oxygen probe 2601, a dissolved oxygen probe internal thread seat 2602, a dissolved oxygen probe nut seat 2603, a dissolved oxygen probe 26 silicone gasket and a dissolved oxygen probe external thread sleeve 2604. The dissolved oxygen probe internal thread seat 2602 is connected to the thermal insulation layer 7 by welding, a limited step surface is arranged in the internal thread hole of the dissolved oxygen probe internal thread seat 2602, one end of the dissolved oxygen probe 2601 is fixedly connected to the dissolved oxygen probe nut seat 2603, the dissolved oxygen probe external thread sleeve 2604 is sleeved on the dissolved oxygen probe 2601, and an extrusion surface is arranged on the end of the dissolved oxygen probe external thread sleeve 2604 away from the dissolved oxygen probe nut seat 2603, the extrusion surface is a conical surface, and the dissolved oxygen probe 26 silicone gasket is sleeved on the dissolved oxygen probe 2601 and located at the extrusion surface. When the dissolved oxygen probe 26 is installed on the fermentation tank, the external threaded sleeve 2604 of the dissolved oxygen probe enters the internal threaded seat 2602 of the dissolved oxygen probe, and the silicone gasket of the dissolved oxygen probe 26 is squeezed between the extrusion surface and the limit step surface, and the free end of the dissolved oxygen probe 2601 passes through the cylinder 2 and enters the interior of the cylinder 2, thereby detecting the dissolved oxygen in the cylinder 2. The above-mentioned dissolved oxygen probe 26 can not only realize the accurate detection of the dissolved oxygen content in the cylinder 2, but also form a good seal with the fermentation tank without leakage problems, avoiding the problem of small fermentation tanks exposed to the air too large due to the opening method of the traditional insulation layer 7, which affects the cold storage temperature control. In addition, the connection method of the dissolved oxygen probe 26 and the fermentation tank does not need to be disassembled during cleaning, which is convenient for cleaning and reduces the labor intensity of the staff.

[0101] Furthermore, a plurality of fermentation tank supports are arranged below the conical bottom 3, and the fermentation tank supports can be softly connected to the ground to achieve a shock-absorbing effect.

[0102] In this embodiment, the control mechanism can be a centralized or distributed controller. For example, the controller can be a single single-chip microcomputer or a distributed plurality of single-chip microcomputers. The control program can be run in the single-chip microcomputer to control the above-mentioned pump bodies, valve bodies, probes, etc. to realize their functions.

[0103] This embodiment also provides a beer fermentation control method, specifically, the beer fermentation control method includes four aspects: temperature control process, pressure control process, yeast discharge process and flushing process. The beer fermentation process mainly includes the following ten stages: wort entering the tank, fermentation, main fermentation 1, main fermentation 2, main fermentation 3, high temperature reduction, high temperature cooling, low temperature cooling, cold storage and wine filtering.

[0104] During the above ten fermentation stages, the temperature control process is generally in refrigeration mode.

[0105] Specifically, the cooling mode has the following steps:

[0106] S11, obtaining the fermentation stage of the beer fermentation system, and determining the temperature setting value and the refrigeration offset value of the fermentation stage.

[0107] The fermentation stage here is one of the above-mentioned wort entering the tank, fermentation, main fermentation 1, main fermentation 2, main fermentation 3, high temperature reduction, high temperature cooling, low temperature cooling, cold storage and wine filtering. For each different stage, different or the same temperature setting values ​​and refrigeration offset values ​​can be set according to needs. For specific setting values, please refer to Table 1 and Table 2 below.

[0108] S12, determining at least one of the first heat exchange portion of the barrel 2, the second heat exchange portion of the barrel 2, and the conical bottom 3 as a temperature control area in the fermentation tank.

[0109] According to the fermentation program setting, different areas that need to be temperature controlled may be different in different fermentation stages. For example, in the "wort entering the tank" stage, it is necessary to simultaneously control the temperature in the first heat exchange part of the cylinder 2, the second heat exchange part of the cylinder 2 and the cone bottom 3, that is, it is necessary to control the temperature of the refrigerant in the upper expansion joint jacket 4, the middle expansion joint jacket 5 and the lower Miller plate jacket 6, while in the "main fermentation 1" stage, it is only necessary to control the temperature in the first heat exchange part of the cylinder 2 and the second heat exchange part of the cylinder 2, that is, it is only necessary to control the temperature of the refrigerant in the upper expansion joint jacket 4 and the middle expansion joint jacket 5. For specific temperature control areas in each fermentation stage, please refer to Tables 1 and 2 below.

[0110] S13, obtaining the real-time temperature of the temperature control area, and determining whether the real-time temperature of the temperature control area is greater than the sum of the temperature setting value and the cooling offset value;

[0111] If the real-time temperature of the temperature control area is greater than the sum of the temperature setting value and the cooling offset value, the refrigerant pump is started, the refrigerant valve is opened, and the opening of the refrigerant valve is adjusted according to the inlet and outlet pressure difference of the temperature control area so that the amount of refrigerant in the first heat exchange chamber, the second heat exchange chamber and the third heat exchange chamber is the preset value.

[0112] In step S13, the upper temperature probe 8, the middle temperature probe 9 and the lower temperature probe 10 are used to obtain the real-time temperatures inside the first heat exchange part of the cylinder 2, the second heat exchange part of the cylinder 2 and the cone bottom 3 respectively.

[0113] Specifically, taking the "main fermentation 1" program as an example, due to the program setting, the lower temperature probe 10 is not effective, that is, it does not participate in the temperature control of the "main fermentation 1" process. When the temperature detection value of the upper temperature probe 8> temperature setting value + refrigeration offset = 11.1℃, the refrigerant pump is started, the refrigerant supply valve of the refrigerant tank is opened, and the main pipe pressure sensor on the inlet main pipe reaches the set value of 1.0bar. The first refrigerant valve adjusts the valve opening according to the difference between the first pressure sensor and the fourth pressure sensor to ensure that the cold capacity in the expansion joint jacket 4 of the upper section of the fermentation tank remains at a certain value. Of course, before the program is run, it is necessary to use manual operation and use the main pipe flowmeter to find out the appropriate cold supply pressure difference in each fermentation tank and each heat exchange jacket and keep a record, so as to facilitate the test of the temperature control intensity between the parallel tanks to achieve consistency. When the middle temperature probe 9 detects a temperature value> temperature setting value+refrigeration offset, the control logic is the same as above, and no further description is given here.

[0114] The control mechanism is equipped with a temperature control program and has the following features: Fig.10 The temperature control interface shown in the figure, through the temperature control interface, the temperature control program can freely set the temperature control step name, step combination, temperature control mode, step time, starting temperature, ending temperature, upper cooling pressure difference, upper valve maximum output, upper temperature control reference point, middle cooling pressure difference, middle valve maximum output, middle temperature control reference point, lower cooling pressure difference, lower valve maximum output, lower temperature control reference point, cooling offset, heating offset, judgment cycle, refrigerant tank temperature setting, cooling pipe pressure setting and other parameters. The setting values ​​of each parameter can be found in Table 1 and Table 2 below.

[0115] Table 1

[0116]

[0117] Table 2

[0118]

[0119] In addition, during the above ten fermentation stages, the pressure in the fermentation tank needs to be controlled.

[0120] Specifically, the pressure control process includes the following steps:

[0121] S21. Obtain the fermentation stage of the beer fermentation system, and determine the upper and lower pressure limits of the fermentation stage.

[0122] The fermentation stage here is one of the above-mentioned wort tank entry, fermentation, main fermentation 1, main fermentation 2, main fermentation 3, high temperature reduction, high temperature cooling, low temperature cooling, cold storage and wine filtering. For each different stage, different or the same upper and lower pressure limits can be set according to needs. In this embodiment, the upper and lower pressure limits of high temperature reduction, high temperature cooling, low temperature cooling, cold storage and wine filtering are all 0.9 bar, and the lower pressure limits are all 0.8 bar.

[0123] S22, obtaining the real-time pressure inside the fermentation tank;

[0124] Determine whether the real-time pressure is greater than the upper pressure limit. If the real-time pressure is greater than the upper pressure limit, start the pressure relief valve 14 for a preset time until the real-time pressure is equal to the lower pressure limit;

[0125] Determine whether the real-time pressure is less than the upper pressure limit. If the real-time pressure is less than the upper pressure limit, close the pressure relief valve 14, open the liquid supply valve 12, and open the CO2 supply valve connected to the upstream of the liquid supply valve 12 for a preset time until the real-time pressure is equal to the upper pressure limit.

[0126] In step S21, the real-time pressure inside the fermentation tank is obtained using the pressure gauge 15.

[0127] by Fig.11 Take the settings in as an example, step 6 is high temperature reduction, step 7 is high temperature cooling, step 8 is low temperature cooling, step 9 is cold storage, and step 10 is wine filtering. After the program enters step 6, it starts the countdown of "control delay" 48h. When the countdown = 1h, the drain valve 13 opens, the pressure relief valve 14 is closed, the liquid supply valve 12 is opened, the CO2 supply valve is opened for 5s, the liquid supply valve 12 is closed, the CO2 supply valve is closed, the drain valve 13 is closed, and the pressure relief valve 14 is opened. When the countdown is over, the pressure relief valve 14 is closed, the liquid supply valve 12 is opened, and the CO2 supply valve is opened. When the pressure value of the pressure gauge 15 reaches the upper limit of the set value, the liquid supply valve 12 is closed, and the CO2 supply valve is closed. When the pressure of the fermentation tank is lower than the lower pressure limit, repeat the above-mentioned pressure preparation action. When the pressure of the fermentation tank is higher than the upper pressure limit, the pressure relief valve 14 opens to release the pressure. When such as Fig.11 When the program proceeds to step 7-10, if the control delay is set to 0, the program skips and the valve does not act.

[0128] The control mechanism is equipped with a pressure control program and has the following features: Fig.11 The pressure control interface shown, through the pressure control interface, the pressure control program can freely set the fermentation steps that need to set the pressure, the lower pressure limit, the upper pressure limit, the detection cycle, the control delay and other parameters.

[0129] In addition, during certain fermentation stages, it is also necessary to control the discharge of yeast from the fermentation tank, such as the high temperature reduction stage.

[0130] Specifically, the yeast discharge process comprises the following steps:

[0131] S31, obtaining the fermentation stage of the beer fermentation system, and determining the pre-discharge flushing type, pre-discharge flushing time, pre-discharge emptying time, single discharge time, discharge number, discharge delay, post-discharge flushing type, post-discharge flushing time, and post-discharge emptying time corresponding to the fermentation stage;

[0132] S32, perform pre-drainage flushing:

[0133] S321, selecting a flushing medium according to the pre-flush type;

[0134] S322, open the yeast discharge flushing valve 22, the CIP station provides flushing medium, the flushing time is equal to the flushing time before discharge, and at the same time open the sewage valve 21, the sewage discharge time is equal to the emptying time before discharge;

[0135] S323, close the yeast discharge flushing valve 22, and close the sewage valve 21;

[0136] S33, performing yeast discharge:

[0137] S331, opening the cone bottom valve 20 provided at the liquid outlet of the cone bottom 3, the opening time being equal to the single discharge time;

[0138] S332, close the cone bottom valve 20;

[0139] S34, perform post-drainage flushing:

[0140] S341, selecting a flushing medium according to the post-drainage flushing type;

[0141] S342, open the yeast discharge flushing valve 22, the CIP station provides flushing with flushing medium, the flushing time is equal to the flushing time after discharge, and at the same time open the sewage valve 21, the sewage discharge time is equal to the emptying time after discharge;

[0142] S343, close the yeast discharge flushing valve 22, and close the sewage valve 21;

[0143] S35. Repeat the above S31, S32, S33 and S34 according to the number of discharges.

[0144] like Fig.12As shown, if the program runs to step 5 "high temperature reduction", according to the program setting, the yeast discharge program is started after a delay of 72 hours. At this time, the yeast discharge flushing valve 22 is opened first, and the drain valve 21 is opened. The CIP station supplies hot water for flushing for 2.0 seconds. After draining for 5.0 seconds, the yeast discharge flushing valve 22 is closed, the drain valve 21 is closed, and the cone bottom valve 20 is opened to maintain the set 1.0 minute. The cone bottom valve 20 is closed, the yeast discharge flushing valve 22 is opened, and the drain valve 21 is opened. The CIP station supplies hot water for flushing for 3.0 seconds. After draining for 5.0 seconds, a yeast discharge is completed. When the set number of discharges is completed and the flushing is completed, the above valves in this step are all closed.

[0145] The control mechanism is equipped with a yeast discharge program and has the following features: Fig.12 The yeast discharge control interface shown in the figure, through the yeast discharge control interface, the yeast discharge program can freely set multiple execution step parameters: pre-discharge flushing type, pre-discharge flushing time, pre-discharge emptying time, single discharge time, number of discharges, discharge delay, post-discharge flushing type, post-discharge flushing time, and post-discharge emptying time.

[0146] The beer fermentation control method also includes a flushing process. By executing the flushing process, automatic cleaning of the tank body and the valve body can be achieved, which greatly improves the intelligence level of the beer fermentation system and reduces the labor intensity of the staff.

[0147] Specifically, the washing process includes the following steps:

[0148] S41, selecting a cleaning step, and determining the total cleaning time, drain valve cleaning time, drain valve cleaning times, and drain valve cleaning interval corresponding to the cleaning step.

[0149] The cleaning steps include pre-cleaning, alkali top water, alkali circulation, water top alkali and hot water flushing. In different cleaning steps, different cleaning media are used, for example, clean water is used for cleaning in the pre-cleaning stage, alkaline water is used for cleaning in the alkali circulation stage, and hot water is used for flushing in the hot water flushing stage. Different cleaning steps can set the same or different total cleaning time, drain valve cleaning time, drain valve cleaning times, and drain valve cleaning intervals according to needs. In this embodiment, it can be set according to Table 3 below.

[0150] S42, select a cleaning agent tank, open the cleaning agent tank supply valve, liquid supply valve 12 and CIP supply pump, and the cleaning agent in the cleaning agent tank enters the tank body through the liquid supply pipe for cleaning.

[0151] S43, close the cleaning agent tank supply valve and the cleaning agent tank return valve, open the cone bottom valve 20, the CIP return pump and the circulation cleaning valve, and the cleaning agent in the tank body flows back into the tank body through the reflux pipe, the circulation cleaning pipe and the liquid supply pipe for circulation cleaning. The circulation cleaning time is equal to the total cleaning time.

[0152] Furthermore, the valve body can be cleaned while the tank body is being cleaned. Specifically, step S42 also includes the following steps: valve body cleaning:

[0153] S421, the cleaning agent in the cleaning agent tank sequentially passes through the pressure relief valve 14, one of the cylinder sampling valve cleaning pipes, the cylinder sampling valve 18, the other cylinder sampling valve cleaning pipe and the cone bottom sampling valve 19 into the cone bottom 3; at the same time, the cleaning agent in the cleaning agent tank sequentially passes through the drain valve 13, the cone bottom sampling valve cleaning pipe and the cone bottom sampling valve 19 into the cone bottom 3, and the valve body cleaning time is equal to the drain valve cleaning time;

[0154] S422, close the drain valve 13 and the pressure relief valve 14, and the closing time is equal to the drain valve cleaning interval;

[0155] S423, repeat step S421 and step S422, the number of repetitions being equal to the number of times the drain valve is cleaned.

[0156] by Fig.13 Take the "alkali circulation" step in the example, after the fermentation tank replacement is completed and the two cylinder sampling valve cleaning pipes and cone bottom sampling valve cleaning pipes are connected, after the alkali top water step is completed, 1 / 3-1 / 2 of the hot alkali will remain in the fermentation tank. After entering the "alkali circulation" step, the CIP supply pump continues to run, and the pump speed is adjusted according to the reading of the pressure gauge 15, the liquid supply valve 12 remains open, the emptying valve 13 and the pressure relief valve 14 enter the cycle opening mode according to the program settings of "emptying valve cleaning time, emptying valve cleaning times, emptying valve cleaning interval" in the figure, the cone bottom valve 20 remains open, the sewage valve 21 remains open, the circulation cleaning valve is opened, the cleaning agent tank supply valve (i.e., the alkali tank alkali supply valve) is closed, and the cleaning agent tank return valve (i.e., the alkali tank alkali return valve) is closed. The system enters the circulation cleaning mode. When the alkali solution temperature decreases, the CIP station heater located on the circulation pipeline will heat the alkali solution and maintain the cleaning temperature.

[0157] The control mechanism is equipped with a flushing program and has the following features: Fig.13 The flushing control interface shown in the figure, through the flushing control interface, the flushing program can freely set the parameters such as the name of the cleaning step, the number of cleaning fermentation tanks, the tank pressure, the total cleaning time, the emptying valve cleaning time, the number of emptying valve cleaning times, the emptying valve cleaning interval, the cleaning agent tank, the cleaning agent temperature, the cleaning agent replenishment, the clean water replenishment, the replaced tank, the front replacement time, the front replacement pump speed, the rear replacement time, the rear replacement pump speed, etc. Some parameters are invalid in the circulation mode, some parameters are invalid in the replacement mode, and some parameters are invalid in the flushing mode. The parameters marked with " / " in Table 3 above are invalid parameters in the current mode.

[0158] Table 3

[0159]

[0160] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A beer fermentation system, characterized in that: include: A fermentation tank, the fermentation tank comprising a tank body and a heat exchange jacket, the tank body comprising a head (1), a cylinder (2) and a conical bottom (3) connected in sequence from top to bottom, the cylinder (2) comprising a first heat exchange portion and a second heat exchange portion arranged above and below, the fermentation tank further comprising a heat insulation layer (7), the heat insulation layer (7) being sleeved on the outside of the tank body; The heat exchange jacket comprises an upper expansion joint jacket (4) and a middle expansion joint jacket (5), wherein the upper expansion joint jacket (4) is sleeved on the first heat exchange part, and the middle expansion joint jacket (5) is sleeved on the second heat exchange part, a first heat exchange cavity allowing the flow of a refrigerant or a heat medium is formed between the upper expansion joint jacket (4) and the outer wall surface of the cylinder (2), and a second heat exchange cavity allowing the flow of a refrigerant or a heat medium is formed between the middle expansion joint jacket (5) and the outer wall surface of the cylinder (2); A temperature control component, the temperature control component includes a refrigerant tank and a heat medium tank, the refrigerant tank is provided with refrigerant, the heat medium tank is provided with heat medium, the refrigerant tank is connected with the first heat exchange cavity and the second heat exchange cavity through a refrigerant pipeline to form a refrigerant circuit, the heat medium tank is connected with the first heat exchange cavity and the second heat exchange cavity through a heat medium pipeline to form a heat medium circuit, a refrigerant pump and a refrigerant valve are provided on the refrigerant pipeline, and a heat medium pump and a heat medium valve are provided on the heat medium pipeline; The heat exchange jacket further comprises a lower Miller plate jacket (6), the lower Miller plate jacket (6) being a conical structure, the lower Miller plate jacket (6) being sleeved on the conical bottom (3), a third heat exchange cavity allowing the flow of refrigerant or heat medium being formed between the lower Miller plate jacket (6) and the outer wall surface of the conical bottom (3), the refrigerant tank being connected to the third heat exchange cavity via the refrigerant pipeline, and the heat medium tank being connected to the third heat exchange cavity via the heat medium pipeline; The beer fermentation system further comprises a temperature detection mechanism, the temperature detection mechanism comprising an upper temperature probe (8), a middle temperature probe (9) and a lower temperature probe (10), wherein a first probe (801) of the upper temperature probe (8) passes through the thermal insulation layer (7) and the barrel (2) and is disposed inside the barrel (2), and is used to detect the temperature inside the barrel (2) corresponding to the first heat exchange portion; a second probe of the middle temperature probe (9) passes through the thermal insulation layer (7) and the barrel (2) and is disposed inside the barrel (2), and is used to detect the temperature inside the barrel (2) corresponding to the second heat exchange portion; and a third probe of the lower temperature probe (10) passes through the thermal insulation layer (7) and the cone bottom (3) and is disposed inside the cone bottom (3), and is used to detect the temperature inside the cone bottom (3); The refrigerant pipeline and the heat medium pipeline both include an inlet pipe group and a return pipe group, the inlet pipe group includes an inlet pipe main pipe and a first inlet pipe branch pipe, a second inlet pipe branch pipe and a third inlet pipe branch pipe which are simultaneously connected to the outlet of the inlet pipe main pipe, the inlet of the inlet pipe main pipe is connected to the refrigerant tank or the heat medium tank, the outlet of the first inlet pipe branch pipe is connected to the first heat exchange cavity, the outlet of the second inlet pipe branch pipe is connected to the second heat exchange cavity, and the outlet of the third inlet pipe branch pipe is connected to the third heat exchange cavity; The return pipe group includes a return pipe main pipe and a first return pipe branch pipe, a second return pipe branch pipe and a third return pipe branch pipe which are connected to the inlet of the return pipe main pipe at the same time, the outlet of the return pipe main pipe is connected to the refrigerant tank or the heat medium tank, the inlet of the first return pipe branch pipe is connected to the first heat exchange cavity, the inlet of the second return pipe branch pipe is connected to the second heat exchange cavity, and the inlet of the third return pipe branch pipe is connected to the third heat exchange cavity; The refrigerant pump or the heat medium pump is arranged on the inlet main pipe, the refrigerant valve comprises a first refrigerant valve, a second refrigerant valve and a third refrigerant valve, the first refrigerant valve is arranged on the first inlet branch of the refrigerant pipeline, the second refrigerant valve is arranged on the second inlet branch of the refrigerant pipeline, the third refrigerant valve is arranged on the third inlet branch of the refrigerant pipeline, the heat medium valve comprises a first heat medium valve, a second heat medium valve and a third heat medium valve, the first heat medium valve is arranged on the first inlet branch of the heat medium pipeline, the second heat medium valve is arranged on the second inlet branch of the heat medium pipeline, and the third heat medium valve is arranged on the third inlet branch of the heat medium pipeline; The first inlet branch, the second inlet branch and the third inlet branch are provided with a first pressure sensor, a second pressure sensor and a third pressure sensor in one-to-one correspondence, and the first return branch, the second return branch and the third return branch are provided with a fourth pressure sensor, a fifth pressure sensor and a sixth pressure sensor in one-to-one correspondence.

2. The beer fermentation system according to claim 1, characterized in that: The fermentation tank further comprises a head attachment and a conical bottom attachment, wherein the head attachment comprises a head pipe (11) and a liquid supply valve (12), and the conical bottom attachment comprises a conical bottom pipe (23) and a sewage discharge valve (21); The beer fermentation system further comprises a tank washing assembly, which comprises a CIP supply pump, a CIP return pump, a circulation cleaning valve, a liquid supply pipe, a return pipe, a circulation cleaning pipe and a cleaning agent tank; The cleaning agent tank contains cleaning agent, the first port of the sealing head pipe (11) is in communication with the liquid inlet of the sealing head (1), the cleaning agent tank is in communication with the second port of the sealing head pipe (11) via the liquid supply pipe, the liquid supply valve (12) is arranged at the second port, and the CIP supply pump is arranged on the liquid supply pipe; The first port of the cone bottom pipe (23) is connected to the liquid outlet of the cone bottom (3), the second port of the cone bottom pipe (23) is connected to the cleaning agent tank through the return pipe, the CIP return pump is arranged on the return pipe, and the drain valve (21) is arranged at the second port; The circulation cleaning pipe is connected between the liquid supply pipe and the reflux pipe, and the circulation cleaning valve is arranged on the circulation cleaning pipe.

3. The beer fermentation system according to claim 2, characterized in that: The fermentation tank further comprises a barrel attachment, wherein the barrel attachment comprises a barrel sampling valve (18), wherein the barrel sampling valve (18) is used to take samples from the barrel (2), and the cone bottom attachment further comprises a cone bottom sampling valve (19), wherein the cone bottom sampling valve (19) is used to take samples from the cone bottom (3); The tank washing assembly further comprises two cylinder sampling valve cleaning pipes and one cone bottom sampling valve cleaning pipe, wherein one end of one of the cylinder sampling valve cleaning pipes is connected to the third port of the sealing pipe (11), and the other end is communicated with the cylinder sampling valve (18); the other cylinder sampling valve cleaning pipe is used to connect the cylinder sampling valve (18) and the cone bottom sampling valve (19); and the cone bottom sampling valve cleaning pipe is used to connect the fourth port of the sealing pipe (11) and the cone bottom sampling valve (19); The end cap attachment also includes a drain valve (13) and a pressure relief valve (14); the drain valve (13) is arranged at the fourth port, and the pressure relief valve (14) is arranged at the third port.

4. The beer fermentation system according to claim 2, characterized in that: The tank washing assembly further comprises a yeast discharge flushing pipe and a yeast discharge flushing valve (22), one end of the yeast discharge flushing pipe being in communication with the interior of the conical bottom (3), and the other end being in communication with the third port of the conical bottom pipe (23), and the yeast discharge flushing valve (22) being arranged at the third port.

5. A beer fermentation control method, characterized in that: Used to control the beer fermentation system according to any one of claims 1 to 4, the beer fermentation control method comprises a temperature control process, the temperature control process comprises a refrigeration mode, and the refrigeration mode comprises the following steps: S11, obtaining the fermentation stage of the beer fermentation system, and determining the temperature setting value and the refrigeration offset value of the fermentation stage; S12, determining that at least one of the first heat exchange portion of the cylinder (2), the second heat exchange portion of the cylinder (2), and the conical bottom (3) is a temperature control area in the fermentation tank; S13, obtaining the real-time temperature of the temperature control area, and determining whether the real-time temperature of the temperature control area is greater than the sum of the temperature setting value and the cooling offset value; If the real-time temperature of the temperature control area is greater than the sum of the temperature setting value and the cooling offset value, the refrigerant pump is started, the refrigerant valve is opened, and the opening of the refrigerant valve is adjusted according to the inlet and outlet pressure difference of the temperature control area so that the amount of refrigerant in the first heat exchange chamber, the second heat exchange chamber and the third heat exchange chamber is a preset value.

6. The beer fermentation control method according to claim 5, characterized in that: The beer fermentation control method includes a pressure control process, and the pressure control process includes the following steps: S21, obtaining the fermentation stage of the beer fermentation system, and determining the upper and lower pressure limits of the fermentation stage; S22, obtaining the real-time pressure inside the fermentation tank; determining whether the real-time pressure is greater than the upper pressure limit, and if the real-time pressure is greater than the upper pressure limit, starting the pressure relief valve (14) for a preset time until the real-time pressure is equal to the lower pressure limit; It is determined whether the real-time pressure is less than the upper pressure limit. If the real-time pressure is less than the upper pressure limit, the pressure relief valve (14) is closed, the liquid supply valve (12) is opened, and the CO2 supply valve connected to the upstream of the liquid supply valve (12) is opened for a preset time until the real-time pressure is equal to the upper pressure limit.

7. The beer fermentation control method according to claim 5, characterized in that: The beer fermentation control method includes a yeast discharge process, and the yeast discharge process specifically includes the following steps: S31, obtaining the fermentation stage of the beer fermentation system, and determining the pre-discharge flushing type, pre-discharge flushing time, pre-discharge emptying time, single discharge time, discharge number, discharge delay, post-discharge flushing type, post-discharge flushing time, and post-discharge emptying time corresponding to the fermentation stage; S32, perform pre-drainage flushing: S321, selecting a flushing medium according to the pre-flush type; S322, open the yeast discharge flushing valve (22), the CIP station provides flushing medium for flushing, the flushing time is equal to the flushing time before discharge, and at the same time open the sewage valve (21), the sewage discharge time is equal to the emptying time before discharge; S323, closing the yeast discharge flushing valve (22), and closing the sewage valve (21); S33, performing yeast discharge: S331, opening the cone bottom valve (20) provided at the liquid outlet of the cone bottom (3), the opening time being equal to the single discharge time; S332, closing the cone bottom valve (20); S34, perform post-drainage flushing: S341, selecting a flushing medium according to the post-drainage flushing type; S342, the yeast discharge flushing valve (22) is opened, and the CIP station provides flushing medium for flushing, and the flushing time is equal to the flushing time after discharge. At the same time, the sewage valve (21) is opened, and the sewage discharge time is equal to the emptying time after discharge; S343, closing the yeast discharge flushing valve (22), and closing the sewage valve (21); S35. Repeat the above S31, S32, S33 and S34 according to the number of discharges.

8. The beer fermentation control method according to claim 5, characterized in that: The beer fermentation control method includes a flushing process, and the flushing process includes the following steps: S41, selecting a cleaning step, and determining the total cleaning time, drain valve cleaning time, drain valve cleaning times, and drain valve cleaning interval corresponding to the cleaning step; S42, select a cleaning agent tank, open the cleaning agent tank supply valve, the liquid supply valve (12) and the CIP supply pump, and the cleaning agent in the cleaning agent tank enters the tank body through the liquid supply pipe for cleaning; S43, closing the cleaning agent tank supply valve and the cleaning agent tank return valve, opening the cone bottom valve (20), the CIP return pump and the circulation cleaning valve, and the cleaning agent in the tank body flows back into the tank body through the reflux pipe, the circulation cleaning pipe and the liquid supply pipe for circulation cleaning, and the circulation cleaning time is equal to the total cleaning time.

9. The beer fermentation control method according to claim 5, characterized in that: Step S42 also includes the following steps: Valve body cleaning: S421, the cleaning agent in the cleaning agent tank sequentially passes through the pressure relief valve (14), one of the cylinder sampling valve cleaning pipes, the cylinder sampling valve (18), the other cylinder sampling valve cleaning pipe and the cone bottom sampling valve (19) into the cone bottom (3); at the same time, the cleaning agent in the cleaning agent tank sequentially passes through the drain valve (13), the cone bottom sampling valve cleaning pipe and the cone bottom sampling valve (19) into the cone bottom (3), and the valve body cleaning time is equal to the drain valve cleaning time; S422, closing the drain valve (13) and the pressure relief valve (14), and the closing time is equal to the drain valve cleaning interval; S423, repeat step S421 and step S422, the number of repetitions being equal to the number of times the drain valve is cleaned.

Images