CN113791651B - Temperature control system for preventing fermentation tank from cooling and freezing - Google Patents
Temperature control system for preventing fermentation tank from cooling and freezing Download PDFInfo
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- CN113791651B CN113791651B CN202110888776.1A CN202110888776A CN113791651B CN 113791651 B CN113791651 B CN 113791651B CN 202110888776 A CN202110888776 A CN 202110888776A CN 113791651 B CN113791651 B CN 113791651B
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12C—BEER; PREPARATION OF BEER BY FERMENTATION; PREPARATION OF MALT FOR MAKING BEER; PREPARATION OF HOPS FOR MAKING BEER
- C12C11/00—Fermentation processes for beer
- C12C11/003—Fermentation of beerwort
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Abstract
The invention discloses a temperature control system for preventing a fermentation tank from being cooled and frozen, which comprises: and the control panel is used for man-machine interaction, controls the control module through the control panel and further controls other components. The invention has the beneficial effects that: the control module sends an instruction to the refrigeration relay and the compressor to stop running for ninety minutes, then the refrigeration relay and the compressor are automatically started for sixty minutes, then the operation is continuously circulated according to the time 'stop-run-stop-run … …' until the temperature reaches two to three ℃, in the process, the temperature of the part of fermentation liquor close to the wall of the tank is reduced after the operation for sixty minutes, at the moment, the air compressor stops running, the heat transfer is carried out between the fermentation liquor in the center of the tank and the fermentation liquor in the wall of the tank, the temperature of the fermentation liquor in the center of the tank and the fermentation liquor in the wall of the tank is basically equal after the balance of ninety minutes, and then the refrigerator is started to pull the temperature, so that the phenomenon of local supercooling can not occur, and the phenomenon of freezing of the fermentation liquor can not occur.
Description
Technical Field
The invention relates to a temperature control system, in particular to a temperature control system for preventing a fermentation tank from being cooled and frozen, and belongs to the technical field of beer brewing.
Background
Beer fermentation goes on under certain temperature, and fermentation in-process yeast metabolism can produce a large amount of heats and make fermentation liquor temperature rise, at this moment need open refrigerating system, takes away unnecessary heat to keep fermentation liquor temperature invariant, when fermentation liquor temperature reached fermentation temperature, refrigerating system would stop work, otherwise the temperature can drop and cross lowly, also do not benefit to the fermentation.
The beer fermentation has several temperature stages, the simplest one is fermentation at about 20 ℃, after the fermentation is finished, the temperature of the fermentation liquor is reduced to 2-3 ℃ for cold storage, when the fermentation liquor is cooled from 20 ℃ to 2-3 ℃, because the refrigerating machine works continuously, the temperature of the copper pipe wound on the outer side of the inner wall can reach below-5 ℃, the temperature sensed by the sensor is the temperature of the position of one third of the diameter of the tank body, the temperature of the point has a larger temperature difference with the temperature of the tank wall, just because of the temperature difference, a temperature gradient is formed, and the temperature of the fermentation liquor in the central part of the tank is reduced gradually through heat convection transfer. The freezing point of the beer is about-1.5 ℃, when the temperature sensed by the fermentation liquor is above 5 ℃, the temperature of the fermentation liquor close to the wall of the tank is above-1.5 ℃, no problem exists at this moment, when the temperature sensed by the fermentation liquor is below 5 ℃, the temperature of the fermentation liquor close to the wall of the tank can reach-1.5 ℃, because the convection transfer of heat needs time, the fermentation liquor close to the wall of the tank can not transfer cold out in time, and the copper pipe can still transfer cold continuously, at this moment, the temperature of the fermentation liquor of the part can continuously drop, and when the temperature is lower than-1.5 ℃, the beer can be frozen. This phenomenon of local supercooling icing is a significant drawback of the prior art.
Disclosure of Invention
The present invention is directed to solving the above problems and providing a temperature control system for preventing a fermentation tank from being cooled and frozen.
The invention achieves the purpose through the following technical scheme, a temperature control system for preventing a fermentation tank from being cooled and frozen comprises:
the control panel is used for man-machine interaction, and controls the control module through the control panel so as to control other components;
the control module comprises four PLC components, is used for receiving and processing data of the temperature detection component and controls the refrigeration component to work at the same time;
the temperature detection assembly comprises a plurality of temperature sensors, and the temperature sensors are used for acquiring the temperature of the outer wall of the fermentation tank;
the refrigeration assembly comprises a refrigeration relay and a compressor, the refrigeration relay is used for connecting the compressor with the control module, and the compressor is used for refrigerating the interior of the fermentation tank;
and the fermentation tank is used for brewing beer.
Preferably, a shutdown indicator lamp is arranged on one side of the front face of the control panel, a refrigeration indicator lamp is arranged below the shutdown indicator lamp, a heating indicator lamp is arranged below the refrigeration indicator lamp, a locking indicator lamp is arranged on one side of the heating indicator lamp, an up-regulation key is arranged on the other side of the front face of the control panel, a function setting key is arranged below the up-regulation key, a down-regulation key is arranged below the function setting key, an unlocking key is arranged on one side of the up-regulation key, a cold-hot conversion key is arranged below the unlocking key, a remaining time key is arranged below the cold-hot conversion key, a low-temperature limiting indicator lamp is arranged on one side of the unlocking key, a temperature setting indicator lamp is arranged above the low-temperature limiting indicator lamp, and a high-temperature limiting indicator lamp is arranged below the low-temperature limiting indicator lamp, the below of high temperature restriction pilot lamp is provided with the operating duration pilot lamp, the below of operating duration pilot lamp is provided with the stop time pilot lamp, the below of stop time pilot lamp is provided with return difference temperature indicator, one side of setting for the temperature indicator is provided with current temperature display screen, one side of high temperature restriction pilot lamp is provided with the temperature display screen of setting for.
Preferably, S1: the control module reads data of the temperature sensor and judges whether the temperature is less than or equal to five degrees centigrade;
if yes, further judging whether the temperature is less than or equal to a set temperature;
if not, the refrigeration relay is continuously switched on, the air compressor continues to refrigerate the interior of the fermentation tank, then the data of the temperature sensor is continuously read, and whether the temperature is less than or equal to five ℃;
s2: the control module further judges whether the temperature is less than or equal to a set temperature;
if so, disconnecting the refrigeration relay and stopping refrigeration of the compressor;
if not, further judging whether the temperature reaches the set temperature.
Preferably, S3: the control module further judges whether the temperature reaches the set temperature;
if so, further judging whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature;
if not, further judging whether the temperature enters five degrees centigrade for the first time.
Preferably, S31: the control module further judges whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature;
if yes, further judging whether the delay time is reached;
if not, whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature or not is judged again
S311: the control module further judges whether the delay time is reached;
if so, the control module is connected with a refrigeration relay, and the air compressor continues to refrigerate;
if not, whether the delay time is reached is judged again.
Preferably, S32: the control module judges whether the temperature enters five degrees centigrade for the first time;
if so, the control module disconnects the refrigeration relay, clears the mark of entering five degrees centigrade for the first time, and further judges whether to delay for ninety minutes;
if not, the control module further judges whether the refrigeration relay is switched on;
s321: the control module further judges whether the refrigeration relay is switched on or not;
if yes, the control module further judges whether to delay sixty minutes;
if not, the control module further judges whether to delay for ninety minutes;
s322: the control module judges whether to delay sixty minutes;
if so, the control module stops the refrigeration relay, the compressor stops refrigerating, and further judgment is made whether to delay ninety minutes;
if not, whether the time delay is sixty minutes or not is judged again.
Preferably, S33: the control module judges whether to delay for ninety minutes;
if yes, the control module is connected with the refrigeration relay, and the compressor works again;
if not, whether the time is delayed for ninety minutes is judged again.
Preferably, S0: before the fermentation liquid in the fermentation tank displays the temperature of five ℃, the control module acquires the temperature of the fermentation liquid in the fermentation tank through a temperature sensor and judges whether the temperature is higher than or equal to the upper limit of high temperature;
if so, starting a refrigeration relay, cooling the fermentation tank, and then further judging whether the temperature is less than or equal to the lower high-temperature limit;
if not, further judging whether the refrigeration relay is started or not;
s01: the control module judges whether the refrigeration relay is started or not;
if yes, further judging whether the temperature is less than or equal to the high-temperature lower limit;
if not, further judging whether the temperature is less than or equal to the low-temperature upper limit;
s02: the control module judges whether the temperature is less than or equal to a high-temperature lower limit or not;
if yes, disconnecting the refrigeration relay;
if not, the refrigeration is continued, and whether the temperature is less than or equal to the high-temperature lower limit is judged again.
Preferably, S011: the control module judges whether the temperature is less than or equal to the low-temperature upper limit or not;
if so, starting the heater, heating the fermentation tank, and further judging whether the temperature is more than or equal to the lower limit of the low temperature;
if not, further judging whether the heater is started;
s012: the control module judges whether to start the heater;
if yes, further judging whether the temperature is more than or equal to the lower low-temperature limit;
if not, whether the temperature is less than or equal to the low-temperature upper limit is judged again;
s013: the control module judges whether the temperature is greater than or equal to a low-temperature lower limit or not;
if yes, the heater is turned off, and heating is stopped;
if not, whether the temperature is more than or equal to the lower low-temperature limit is judged again.
The invention has the beneficial effects that:
firstly, after the temperature of the fermentation liquor is reduced to five ℃, the control module sends an instruction to the refrigeration relay and the compressor to stop running for ninety minutes, then the refrigeration relay and the compressor are automatically started for sixty minutes, and then the operation is continuously circulated according to the time 'stop-run-stop-run … …' until the temperature reaches two to three ℃, in the process, the temperature of the part of the fermentation liquor close to the wall of the tank is reduced after the operation is carried out for sixty minutes, at the moment, the air compressor stops running, the heat transfer is carried out between the fermentation liquor in the center of the tank and the fermentation liquor in the wall of the tank, the temperature of the fermentation liquor in the center of the tank and the temperature of the fermentation liquor in the wall of the tank are basically equal after ninety minutes of balance, and then the refrigerator is started to pull the temperature, so that the phenomenon of local supercooling can not occur, and the phenomenon of freezing of the fermentation liquor can not occur.
Secondly, the control panel and the control module are used for interaction, the control panel is used for monitoring the operation of a control module program in the control module in real time, the internal condition of the fermentation tank is conveniently detected, and the fermentation efficiency of the fermentation tank is improved.
Drawings
FIG. 1 is a schematic diagram of a working block diagram of the present invention;
FIG. 2 is a flowchart of the overall workflow programming logic of the present invention;
FIG. 3 is a flow chart of a conventional programming logic for a temperature control system;
fig. 4 is a schematic diagram of a control panel structure according to the present invention.
In the figure: 1. a shutdown indicator light; 2. a refrigeration indicator light; 3. a heating indicator light; 4. a locking indicator light; 5. a current temperature display screen; 6. setting a temperature display screen; 7. setting a temperature indicator light; 8. a low temperature limit indicator light; 9. a high temperature limit indicator light; 10. an operating time indicator light; 11. a stop time indicator light; 12. a return difference temperature indicator light; 13. an unlocking key; 14. a key is adjusted upwards; 15. a cold-hot conversion key; 16. a function setting key; 17. downward adjustment of the key; 18. the remaining time button.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a temperature control system for preventing a fermenter from being cooled and frozen includes:
the control panel is used for man-machine interaction, and controls the control module through the control panel so as to control other components;
the control module comprises four PLC components, is used for receiving and processing the data of the temperature detection component and simultaneously controls the work of the refrigeration component;
the temperature detection assembly comprises a plurality of temperature sensors, and the temperature sensors are used for acquiring the temperature of the outer wall of the fermentation tank;
the refrigeration assembly comprises a refrigeration relay and a compressor, the refrigeration relay is used for connecting the compressor and the control module, and the compressor is used for refrigerating the interior of the fermentation tank;
and the fermentation tank is used for brewing beer.
As a technical optimization scheme of the present invention, S0: before the fermentation liquid in the fermentation tank displays the temperature of five ℃, the control module acquires the temperature of the fermentation liquid in the fermentation tank through a temperature sensor and judges whether the temperature is higher than or equal to the upper limit of high temperature;
if so, starting a refrigeration relay, cooling the fermentation tank, and then further judging whether the temperature is less than or equal to the lower high-temperature limit;
if not, further judging whether the refrigeration relay is started or not;
s01: the control module judges whether the refrigeration relay is started or not;
if yes, further judging whether the temperature is less than or equal to a high-temperature lower limit;
if not, further judging whether the temperature is less than or equal to the low-temperature upper limit;
s02: the control module judges whether the temperature is less than or equal to a high-temperature lower limit or not;
if yes, disconnecting the refrigeration relay;
if not, the refrigeration is continued, and whether the temperature is less than or equal to the high-temperature lower limit is judged again.
As a technical optimization scheme of the present invention, S011: the control module judges whether the temperature is less than or equal to the low-temperature upper limit or not;
if so, starting the heater, heating the fermentation tank, and further judging whether the temperature is more than or equal to the lower limit of the low temperature;
if not, further judging whether the heater is started;
s012: the control module judges whether to start the heater;
if yes, further judging whether the temperature is more than or equal to the lower low-temperature limit;
if not, whether the temperature is less than or equal to the low-temperature upper limit is judged again;
s013: the control module judges whether the temperature is greater than or equal to a low-temperature lower limit or not;
if yes, the heater is turned off, and heating is stopped;
if not, whether the temperature is more than or equal to the lower limit of the low temperature is judged again.
As a technical optimization scheme of the present invention, S1: the control module reads data of the temperature sensor and judges whether the temperature is less than or equal to five degrees centigrade;
if yes, further judging whether the temperature is less than or equal to a set temperature;
if not, the refrigeration relay is continuously switched on, the air compressor continues to refrigerate the interior of the fermentation tank, then the data of the temperature sensor is continuously read, and whether the temperature is less than or equal to five ℃;
s2: the control module further judges whether the temperature is less than or equal to a set temperature;
if so, disconnecting the refrigeration relay and stopping refrigeration of the compressor;
if not, further judging whether the temperature reaches the set temperature.
As a technical optimization scheme of the present invention, S3: the control module further judges whether the temperature reaches the set temperature;
if so, further judging whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature;
if not, further judging whether the temperature enters five degrees centigrade for the first time.
S31: the control module further judges whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature;
if yes, further judging whether the delay time is reached;
if not, whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature or not is judged again
S311: the control module further judges whether the delay time is reached;
if so, the control module is connected with a refrigeration relay, and the air compressor continues to refrigerate;
if not, whether the delay time is reached is judged again.
As a technical optimization scheme of the present invention, S32: the control module judges whether the temperature enters five degrees centigrade for the first time;
if so, the control module disconnects the refrigeration relay, clears the mark of entering five degrees centigrade for the first time, and further judges whether to delay for ninety minutes;
if not, the control module further judges whether the refrigeration relay is switched on;
s321: the control module further judges whether the refrigeration relay is switched on or not;
if yes, the control module further judges whether to delay sixty minutes;
if not, the control module further judges whether to delay for ninety minutes;
s322: the control module judges whether to delay sixty minutes;
if so, the control module stops the refrigeration relay, the compressor stops refrigerating, and further judgment is made whether to delay ninety minutes;
if not, whether the time delay is sixty minutes or not is judged again.
As a technical optimization scheme of the present invention, S33: the control module judges whether to delay for ninety minutes;
if yes, the control module is connected with the refrigeration relay, and the compressor works again;
if not, whether the time delay is ninety minutes is judged again.
As a technical optimization scheme of the invention, a shutdown indicator lamp 1 is arranged on one side of the front face of a control panel, a refrigeration indicator lamp 2 is arranged below the shutdown indicator lamp 1, a heating indicator lamp 3 is arranged below the refrigeration indicator lamp 2, a locking indicator lamp 4 is arranged on one side of the heating indicator lamp 3, an up-regulation key 14 is arranged on the other side of the front face of the control panel, a function setting key 16 is arranged below the up-regulation key 14, a down-regulation key 17 is arranged below the function setting key 16, an unlocking key 13 is arranged on one side of the up-regulation key 14, a cold-hot conversion key 15 is arranged below the unlocking key 13, a remaining time key 18 is arranged below the cold-hot conversion key 15, a low-temperature limiting indicator lamp 8 is arranged on one side of the unlocking key 13, and a temperature setting indicator lamp 7 is arranged above the low-temperature limiting indicator lamp 8, the below of low temperature restriction pilot lamp 8 is provided with high temperature restriction pilot lamp 9, the below of high temperature restriction pilot lamp 9 is provided with operating duration pilot lamp 10, the below of operating duration pilot lamp 10 is provided with stop time pilot lamp 11, the below of stop time pilot lamp 11 is provided with return difference temperature indicator 12, one side of setting for temperature indicator 7 is provided with current temperature display 5, one side of high temperature restriction pilot lamp 9 is provided with sets for temperature display 6.
As a technical optimization scheme of the invention, the indicator light and the keys on the front side of the control panel are provided with character marks, the temperature reduction mode of the fermentation liquid in the fermentation tank is the same as that of the prior art before the display temperature of the fermentation liquid is reduced to five ℃ (see figure 3 and step S0), when the temperature of the fermentation liquid is reduced to five ℃ (see figure 3 and step S0), the control module sends an instruction to the refrigeration relay and the compressor to stop running for ninety minutes, then automatically starts for sixty minutes, and then continuously circulates according to the time 'stop-run-stop-run … …' until the temperature reaches two to three ℃ (see figure 2 and steps S1 to S3).
When the invention is used
Please refer to fig. 1 to 4;
the operation step one:
pressing the 'unlocking key 13' for thirty seconds turns off the locking indicator lamp 4, releases the locking state and simultaneously sounds with buzzing;
operation step two;
pressing the function setting button 16 for more than six seconds until the set temperature indicator light 7 is turned on;
operation step three;
pressing the function setting key 16 to switch to the low temperature limiting indicator light 8 to be on;
operation step four;
pressing the key 14 or 17 to adjust the low temperature limit value to 0.0;
operation step five;
pressing a function setting 16 key, and switching to turn on the return difference temperature indicator lamp 12;
operation step six;
pressing the key of the up key 14 or the down key 17 to adjust the low temperature limit value to 1.0;
operation step seven;
pressing the function setting key 16 to switch to the set temperature indicator light 7 to be on;
an operation step eight;
pressing the key of the up-regulation key 14 or the down-regulation key 17 to regulate the temperature to the required fermentation temperature, such as twenty ℃;
nine operation steps
And after the fermentation is finished, repeating the operation steps from the first step to the second step, and setting the set temperature to be two ℃.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. The utility model provides a prevent frozen temperature control system of fermentation cylinder cooling which characterized in that includes: the control panel is used for man-machine interaction, and controls the control module through the control panel so as to control other components; the control module comprises four PLC components, is used for receiving and processing data of the temperature detection component and controls the refrigeration component to work at the same time; the temperature detection assembly comprises a plurality of temperature sensors, and the temperature sensors are used for acquiring the temperature of the outer wall of the fermentation tank; the refrigeration assembly comprises a refrigeration relay and a compressor, the refrigeration relay is used for connecting the compressor with the control module, and the compressor is used for refrigerating the interior of the fermentation tank; a fermenter for brewing beer;
the temperature control method of the temperature control system for preventing the fermentation tank from being cooled and frozen specifically comprises the following steps:
s1: the control module reads data of the temperature sensor and judges whether the temperature is less than or equal to five degrees centigrade;
if yes, further judging whether the temperature is less than or equal to a set temperature;
if not, the refrigeration relay is continuously switched on, the air compressor continues to refrigerate the interior of the fermentation tank, then the data of the temperature sensor is continuously read, and whether the temperature is less than or equal to five ℃;
s2: the control module further judges whether the temperature is less than or equal to a set temperature;
if so, disconnecting the refrigeration relay and stopping refrigeration of the compressor;
if not, further judging whether the temperature reaches the set temperature;
s3: the control module further judges whether the temperature reaches the set temperature;
if so, further judging whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature;
if not, further judging whether the temperature enters five degrees centigrade for the first time;
s31: the control module further judges whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature;
if yes, further judging whether the delay time is reached;
if not, whether the current temperature is more than or equal to the sum of the set temperature and the return difference temperature or not is judged again
S311: the control module further judges whether the delay time is reached;
if so, the control module is connected with a refrigeration relay, and the air compressor continues to refrigerate;
if not, judging whether the delay time is reached again;
s32: the control module judges whether the temperature enters five degrees centigrade for the first time;
if yes, the control module disconnects the refrigeration relay, clears the mark of entering five degrees centigrade for the first time, and further judges whether to delay for ninety minutes;
if not, the control module further judges whether the refrigeration relay is switched on;
s321: the control module further judges whether the refrigeration relay is switched on or not;
if yes, the control module further judges whether to delay sixty minutes;
if not, the control module further judges whether to delay for ninety minutes;
s322: the control module judges whether to delay sixty minutes;
if yes, the control module stops the refrigeration relay, the compressor stops refrigeration, and whether the time is delayed for ninety minutes is further judged;
if not, judging whether to delay sixty minutes again;
s33: the control module judges whether to delay for ninety minutes;
if yes, the control module is connected with the refrigeration relay, and the compressor works again;
if not, whether the time is delayed for ninety minutes is judged again.
2. The temperature control system for preventing the fermentation tank from being cooled and frozen according to claim 1, wherein: a shutdown indicator lamp (1) is arranged on one side of the front face of the control panel, a refrigeration indicator lamp (2) is arranged below the shutdown indicator lamp (1), a heating indicator lamp (3) is arranged below the refrigeration indicator lamp (2), a locking indicator lamp (4) is arranged on one side of the heating indicator lamp (3), an up-regulation key (14) is arranged on the other side of the front face of the control panel, a function setting key (16) is arranged below the up-regulation key (14), a down-regulation key (17) is arranged below the function setting key (16), an unlocking key (13) is arranged on one side of the up-regulation key (14), a cold-hot conversion key (15) is arranged below the unlocking key (13), a remaining time key (18) is arranged below the cold-hot conversion key (15), and a low-temperature limiting indicator lamp (8) is arranged on one side of the unlocking key (13), the utility model discloses a temperature control device, including low temperature restriction pilot lamp (8), the below of low temperature restriction pilot lamp (8) is provided with high temperature restriction pilot lamp (9), the below of high temperature restriction pilot lamp (9) is provided with operating duration pilot lamp (10), the below of operating duration pilot lamp (10) is provided with stop time pilot lamp (11), the below of stop time pilot lamp (11) is provided with return difference temperature pilot lamp (12), one side of setting for temperature pilot lamp (7) is provided with current temperature display screen (5), one side of high temperature restriction pilot lamp (9) is provided with sets for temperature display screen (6).
3. The temperature control system for preventing the fermentation tank from being cooled and frozen according to claim 1, wherein:
s0: before the fermentation liquid in the fermentation tank displays the temperature of five ℃, the control module acquires the temperature of the fermentation liquid in the fermentation tank through a temperature sensor and judges whether the temperature is higher than or equal to the upper limit of high temperature;
if so, starting a refrigeration relay, cooling the fermentation tank, and then further judging whether the temperature is less than or equal to the lower high-temperature limit;
if not, further judging whether the refrigeration relay is opened or not;
s01: the control module judges whether the refrigeration relay is started or not;
if yes, further judging whether the temperature is less than or equal to the high-temperature lower limit;
if not, further judging whether the temperature is less than or equal to the low-temperature upper limit;
s02: the control module judges whether the temperature is less than or equal to a high-temperature lower limit or not;
if yes, disconnecting the refrigeration relay;
if not, the refrigeration is continued, and whether the temperature is less than or equal to the high-temperature lower limit or not is judged again.
4. The temperature control system for preventing the fermentation tank from being cooled and frozen according to claim 3, wherein:
s011: the control module judges whether the temperature is less than or equal to the upper limit of the low temperature;
if so, starting the heater, heating the fermentation tank, and further judging whether the temperature is more than or equal to the lower limit of the low temperature;
if not, further judging whether the heater is started;
s012: the control module judges whether to start the heater;
if yes, further judging whether the temperature is more than or equal to the lower low-temperature limit;
if not, whether the temperature is less than or equal to the low-temperature upper limit is judged again;
s013: the control module judges whether the temperature is greater than or equal to a low-temperature lower limit or not;
if yes, the heater is turned off, and heating is stopped;
if not, whether the temperature is more than or equal to the lower limit of the low temperature is judged again.
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CN101591596A (en) * | 2009-06-22 | 2009-12-02 | 山东中德设备有限公司 | A kind of Beer Ferment Control system and method based on DCS |
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Application publication date: 20211214 Assignee: Henan Jingde Wine Co.,Ltd. Assignor: NANYANG JINGDE BEER TECHNOLOGY DEVELOPMENT CO.,LTD. Contract record no.: X2023980039207 Denomination of invention: A temperature control system for preventing fermentation tank from cooling and freezing Granted publication date: 20220527 License type: Common License Record date: 20230809 |