CN112268400A - Wave band type ventilation system for adjusting gas content - Google Patents
Wave band type ventilation system for adjusting gas content Download PDFInfo
- Publication number
- CN112268400A CN112268400A CN202011148475.7A CN202011148475A CN112268400A CN 112268400 A CN112268400 A CN 112268400A CN 202011148475 A CN202011148475 A CN 202011148475A CN 112268400 A CN112268400 A CN 112268400A
- Authority
- CN
- China
- Prior art keywords
- temperature
- gas content
- gas
- humidity
- content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention discloses a wave-band type ventilation system for adjusting gas content, a detection device detects the content information of each gas in a refrigeration house, the content information is sent to a PLC (programmable logic controller), the PLC calculates the wave value of the gas content according to the content information, when the content information of the gas exceeds a preset value, the air interchanger is controlled to be started, the air interchanger exhausts the harmful gas in the cold storage and simultaneously exchanges fresh air into the cold storage, the gas content is changed correspondingly according to the change information of the temperature and the humidity in the refrigeration house, the temperature and humidity infinite circulation wave value control, the temperature and temperature difference infinite circulation wave value control, the gas content detection device and the ventilation device are combined, the temperature, the humidity and the oxygen content in the cold storage are always in a circulating state, a normal good temperature and humidity environment is ensured, and products are always in a so-called 'dormant' state in the cold storage.
Description
Technical Field
The invention relates to the technical field of storage of a refrigeration house, in particular to a wave band type ventilation system for adjusting gas content.
Background
The cold storage (refrigerator, cold storage chamber) is a refrigeration device which keeps constant low temperature, and is a civil product which keeps food or other articles in constant low temperature cold state, and people can not leave the cold storage more and more along with the development of society. However, sometimes a user opens the refrigerator and smells a bad smell, which is a bad smell and makes the user feel sick. When the fruits, vegetables and meat products are placed in the cold storage, air in the cold storage is not circulated, and the fruits, vegetables and meat products are subjected to respiratory metabolism in the cold storage, so that the oxygen and carbon dioxide contents in the air are changed after a long time, the rotting degree of the fruits and the vegetables is accelerated, harmful gases and bacteria are generated, for example, the adaptability of some bacteria is strong, the growth of normal-temperature bacteria can be inhibited by the low-temperature environment in the cold storage, but for some low-temperature-philic bacteria, the low-temperature environment of the cold storage at the temperature of 0-10 ℃ is still a growing and propagating hotbed, and the bacteria can generate a plurality of metabolic gases in the growing and metabolizing process, such as methane, hydrogen sulfide, methyl mercaptan, methyl amine and other odorous gases, and a plurality of odorous gases can be mixed together to generate a more unpleasant peculiar smell in the cold storage.
The research on the influence of high carbon dioxide on fruits and vegetables such as apples, bergamot pears, tomatoes and the like shows that the fruits and vegetables have stronger tolerance to the high carbon dioxide in the early storage period, aged fruits in the later storage period are sensitive to the high carbon dioxide, the high carbon dioxide can accelerate anaerobic respiration to cause serious physiological damage, the symptom of the carbon dioxide damage is similar to that of the hypoxia damage, the surface or internal tissues or both of the aged fruits and the vegetables are browned, brown spots, pits or tissues are dehydrated and withered or even form cavities, the carbon dioxide content in a cold storage is properly increased, the oxygen content is properly reduced, the degradation processes such as pectin substance degradation and chlorophyll degradation can be inhibited, and the maturation process of the fruits and vegetables is delayed.
Therefore, how to change the content of various gases in the air in the refrigerator and be more beneficial to the preservation of fruit and vegetable products is a technical problem to be solved urgently in the field of the refrigerator.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides the wave band type ventilation system, and the mature process of fruit and vegetable products can be delayed by arranging the detection device, the gas regulating device, the PLC and the ventilation device; inhibit the harm of microorganisms, thereby preserving the fruit and vegetable products in the cold storage and achieving the effect of no loss of nutrient substances after long-time storage.
In order to achieve the purpose, the invention provides a wave band type ventilation system for adjusting gas content, which is applied to a refrigeration house and comprises a detection device, a PLC (programmable logic controller), a ventilation device, a temperature and humidity camera and a gas adjusting device; the detection device comprises: for
Detecting the content information of various gases in the refrigeration house and sending the content information of the gases to the PLC;
the air interchanger comprises: exchanging gas in the refrigerator with gas outside the refrigerator;
humiture camera: monitoring temperature and humidity information in the refrigeration house, and sending the temperature and humidity information to the PLC;
the PLC controller: receiving and processing the gas content information sent by the detection device, and controlling the air interchanger to be opened/closed; setting a gas content range value in the cold storage according to the temperature and humidity information sent by the temperature and humidity camera;
a gas conditioning device: and the controller is connected with the PLC, and the gas content in the refrigeration house is adjusted within a set gas content range value.
Preferably, the detection device comprises a gas content sensor and a detection chip, one end of the detection chip is connected with the gas content sensor to detect gas content information, and the other end of the detection chip sends the detected gas content information to the PLC.
Preferably, the gas content sensor includes a hydrogen sulfide sensor, a carbon dioxide sensor and an oxygen sensor which are independent of each other.
Preferably, a gas content wave value is set in the PLC controller, the PLC controller determines whether the gas content information sent by the detection chip exceeds the gas content wave value, and controls the ventilation device to be turned on when the gas content information exceeds the gas content wave value, and controls the ventilation device to be turned off when the gas content information is smaller than the gas content wave value.
Preferably, the ventilation device includes an air supply duct that supplies outside air into the refrigerator and an air exhaust duct that exhausts the harmful gas in the refrigerator from the refrigerator.
Preferably, after the ventilation of the ventilation device is completed, a ventilation completion instruction is sent to the PLC controller, and the PLC controller controls the detection device to detect the content information of carbon dioxide and oxygen in the refrigerator and feed back the content information of carbon dioxide and oxygen to the PLC controller.
Preferably, the PLC controller calculates and sets the content range values of carbon dioxide and oxygen in the refrigeration storage according to the temperature and humidity information sent by the temperature and humidity camera and the content information of carbon dioxide and oxygen fed back by the detection device.
Preferably, when the temperature and humidity detected by the temperature and humidity camera is 5 ℃ and the humidity is 60%, the range value of the carbon dioxide content in the refrigeration house is set to be 2% -3%, and the range value of the oxygen content is set to be 0.5% -2%;
when the temperature detected by the temperature and humidity camera is 10 ℃ and the humidity is 80%, the set range value of the carbon dioxide content in the refrigeration house is 2.5% -5.5%, and the set range value of the oxygen content is 1% -2.5%;
when the temperature is 15 ℃ and the humidity is adjusted to be 95%, the set range value of the carbon dioxide content in the refrigeration house is 4% -6.5%, and the set range value of the oxygen content is 2.0% -3.5%.
Preferably, the gas regulating device comprises a nitrogen generator 12 and a regulator, one end of the regulator is connected with the nitrogen generator 12, the other end of the regulator is connected with the PLC, and the gas content in the refrigeration house is regulated within a set gas content range value.
Preferably, the air cooling unit and/or the direct cooling unit are/is connected with the PLC, the PLC starts the air cooling unit and/or the direct cooling unit to refrigerate, the temperature is reduced to 1 ℃ after 30 minutes, then the air cooling unit and/or the direct cooling unit enters a temperature rising state, the temperature rises to 15 ℃ after 30 minutes, the temperature is reduced to 1 ℃ at a rate of 0.5 ℃ per minute, the temperature is raised to 15 ℃ at a rate of 0.3 ℃ per minute, and then the dynamic infinite circulation control refrigeration of temperature and humidity with temperature difference is completed.
The invention has the beneficial effects that: compared with the prior art, the invention provides the wave band type ventilation system for adjusting the gas content, the content information of each gas (such as carbon dioxide, oxygen, methane, hydrogen sulfide, methyl mercaptan and methylamine) in the air in the refrigerator is detected by a detection device, and the content information is sent to a PLC controller, the PLC controller receives the content information of the detection device, therefore, the PLC calculates the gas content wave value according to the content information, when the content information of the gas exceeds a preset value, controlling the starting of the air interchanger, discharging harmful gases (such as methane, hydrogen sulfide, methyl mercaptan, methylamine) and the like in the cold storage by the air interchanger, and simultaneously, fresh air is changed into the cold storage, the gas regulating device is controlled according to the gas content wave value, therefore, the content of carbon dioxide and oxygen in the refrigeration house is adjusted to be within a set range value, and the ripening process of fruit and vegetable products can be delayed; the method inhibits the harm of microorganisms, so that the fruit and vegetable products can be preserved in the refrigerator for a long time without generating peculiar smell, and the effect that the nutrient substances in the fruit and vegetable products are not lost after being stored for a long time is achieved, thereby ensuring that a normal and good temperature and humidity environment exists in the refrigerator, ensuring that the fruit and vegetable products are always in a so-called 'dormant' state, and keeping the activity of cells of the fruit and vegetable products.
Drawings
FIG. 1 is a block diagram of the overall system of the present invention;
FIG. 2 is a detailed block diagram of the present invention;
FIG. 3 is a schematic view of the ventilation time node workflow of the present invention;
fig. 4 is a flow chart of the operation of the ventilation device of the present invention.
The main element symbols are as follows:
1. a detection device; 2. a PLC controller; 3. a ventilation device; 4. a temperature and humidity camera; 5. a gas conditioning device; 6. a humidifying and dehumidifying device; 10. an air cooling unit; 11. a direct cooling unit; 12. a nitrogen generator; 14. a carbon dioxide sensor; 15. an oxygen sensor; 16. a hydrogen sulfide sensor; 17. an air supply duct; 18. an exhaust duct; 19. a drainage fan.
Detailed Description
In order to more clearly describe the present invention, the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 4, the present invention provides a band type ventilation system for adjusting gas content, which is applied to a refrigeration storage, and includes a detection device 1, a PLC controller 2, a ventilation device 3, a temperature and humidity camera 4, and a gas adjusting device 5; the detection device 1: the system is used for detecting the content information of various gases in the refrigeration house and sending the content information of the gases to the PLC 2; the ventilator 3: exchanging gas in the refrigerator with gas outside the refrigerator; humiture camera 4: monitoring temperature and humidity information in the refrigeration house, and sending the temperature and humidity information to the PLC 2; the PLC controller 2: receiving and processing the gas content information sent by the detection device 1, and controlling the air interchanger 3 to be opened/closed; setting a gas content range value in the cold storage according to temperature and humidity information sent by the temperature and humidity camera 4; gas conditioning device 5: be connected with PLC controller 2, adjust the gas content in the freezer within the gas content range value of setting for, wherein the temperature value detects through setting up temperature sensor, and the humidity value detects through setting up humidification dehumidification sensor.
The detection device 1 is arranged, the content information of each gas (such as carbon dioxide, oxygen, methane, hydrogen sulfide, methyl mercaptan and methyl amine) in the air in the refrigerator can be detected and sent to the PLC controller 2, the PLC controller 2 is arranged, the content information of the detection device 1 can be received, when the content information of the gas exceeds a gas content threshold value, the ventilation device 3 is controlled to be started, the ventilation device 3 exhausts harmful gases (such as methane, hydrogen sulfide, methyl mercaptan and methyl amine) in the refrigerator and simultaneously changes fresh air into the refrigerator, the ventilation device 3 sends a completion instruction to the PLC controller 2, the PLC controller 2 controls the detection device 1 to detect the content information of carbon dioxide and oxygen in the refrigerator and sends the content information to the PLC controller 2, the PLC controller 2 receives the content information of the detection device 1 and calculates a corresponding gas content range value according to temperature and humidity, thereby controlling the gas regulating device 5 to regulate the contents of carbon dioxide and oxygen in the refrigeration house to a set range value, and delaying the ripening process of fruit, vegetable and meat products; the harm of microorganisms is inhibited, so that the fruit and vegetable products can be preserved in a refrigeration house for a long time without generating peculiar smell, and the effect that the nutrient substances in the products are not lost after the products are stored for a long time is achieved.
In this embodiment, the detecting device 1 includes a gas content sensor and a detecting chip, one end of the detecting chip is connected with the gas content sensor to detect the gas content information, the other end sends the detected gas content information to the PLC controller 2, the gas content sensor includes a hydrogen sulfide sensor 16, a carbon dioxide sensor 14 and an oxygen sensor 15 which are independent of each other, when the concentration of hydrogen sulfide in the refrigerator exceeds 100 mg/kg (the standard for pollution-free dehydrated vegetables) (NY 5184-2002) stipulates that the hygienic index of the residual quantity of hydrogen sulfide does not exceed 100 g/kg, the detecting chip in the refrigerator sends a signal to the PLC controller 2 to implement control and ventilation, the hydrogen sulfide gas in the refrigerator is discharged from the refrigerator, and simultaneously fresh air outside the refrigerator is input into the refrigerator to perform gas circulation in the refrigerator to ensure that a normal gas exists in the refrigerator, the fruit and vegetable products are ensured to be in a so-called 'dormant' state all the time in a good temperature and humidity environment, the activity of cells of the fruit and vegetable products is kept, the gas content sensor can detect harmful gases such as methane, hydrogen sulfide, methyl mercaptan, methyl amine and the like, and the ventilation device 3 can discharge the harmful gases out of the refrigerator.
In this embodiment, be equipped with gas content wave value in the PLC controller 2, PLC controller 2 judges whether the gas content information that detects the chip and send exceeds gas content wave value, when exceeding gas content wave value, control breather 3 opens, when being less than gas content wave value, control breather 3 closes, when the harmful gas content in the freezer is too high like this, through starting breather 3, can immediately discharge it from the freezer, in time prevent that harmful gas from preserving for a long time and causing more serious harm to the vegetables and fruits in the freezer, and can cool the fresh air in the storehouse, prevent that the user from inhaling harmful gas.
In this embodiment, the ventilation device 3 includes an air supply duct 17 and an exhaust duct 18, the air supply duct 17 sends the outside air into the refrigerator, the exhaust duct 18 exhausts the harmful gas in the refrigerator, the air supply duct 17 is connected with a drainage fan 19, a positive pressure region and a negative pressure region are arranged at the air outlet of the drainage fan 19, the negative pressure region sucks the air in the refrigerator to mix, and the mixed air flow is sent out from the positive pressure region, because the sent air flow is mixed with the air flow in the refrigerator uniformly, the air flow at the air outlet can be attached to the surface of the refrigerator to diffuse rapidly, and enter the middle zone of the refrigerator uniformly.
In this embodiment, after the ventilation of the ventilation device 3 is completed, a ventilation completion instruction is sent to the PLC controller 2, and the PLC controller 2 controls the detection device 1 to detect the content information of carbon dioxide and oxygen in the refrigerator and feeds back the content information of carbon dioxide and oxygen to the PLC controller 2; the PLC controller 2 calculates and sets the content range values of the carbon dioxide and the oxygen in the cold storage according to the temperature and humidity information sent by the temperature and humidity camera 4 and the content information of the carbon dioxide and the oxygen fed back by the detection device 1, so that the content of the gas in the cold storage can be controlled, and the content of the gas can be maximally favorable for the freshness preservation of fruit, vegetable and meat products.
In the embodiment, the air cooling unit 10 and/or the direct cooling unit 11 are/is further included, the air cooling unit 10 and/or the direct cooling unit 11 are/is connected with the PLC controller 2, the PLC controller 2 starts the air cooling unit 10 and/or the direct cooling unit 11 to refrigerate, the temperature is reduced to 1 ℃ after 30 minutes, then the temperature is raised to 15 ℃ after 30 minutes, the temperature is reduced to 1 ℃ at the rate of 0.5 ℃ per minute, and then the temperature is raised to 15 ℃ at the rate of 0.3 ℃ per minute, so that a temperature cycle is completed; the humiture camera 4 is connected a humidification dehumidification equipment 6, when freezer temperature from normal atmospheric temperature 25 ℃ fall to 1 ℃ when the humidity value in the freezer is less than 30% humidification dehumidification equipment 6 automatic start and implement the humidification, then 6 automatic shutdown and the stop humidification of humidification dehumidification equipment when freezer humidity value reaches 95%, the dehumidification of taking a breath when humidity exceedes 95%, can avoid the excessive loss of moisture in the fruit vegetables through setting up higher relative humidity, can make the fruit vegetables keep fresh state, keep stronger disease resistance.
In this embodiment, the gas adjusting device 5 includes a nitrogen generator 12 and an adjuster, one end of the adjuster is connected to the nitrogen generator 12, the other end of the adjuster is connected to the PLC controller 2, the gas content in the refrigerator is adjusted within a set gas content range, the nitrogen generator 12 is used for separating air, the air is introduced into the nitrogen generator 12, the nitrogen generator 12 is internally provided with an adsorbent, the adsorbent is a molecular sieve, the molecular sieve is an artificially synthesized hydrated aluminosilicate (zeolite) or natural zeolite with a molecular sieving effect, oxygen and nitrogen are separated by using different diffusion speeds of oxygen and nitrogen in the air in the molecular sieve at normal temperature and pressure, and the purity and the gas production amount of the nitrogen can be adjusted according to the needs of customers.
In the prior art, French scientists firstly study the influence of air on apple ripening, and published research results in 1821, and the research finds that the carbon dioxide content in the air of a storage place is properly improved and the oxygen content of the air is properly reduced, so that the respiratory metabolism of fruits and vegetables can be effectively inhibited, and the degradation processes such as pectin substance degradation and chlorophyll degradation are inhibited, and the ripening process of the fruits and vegetables is delayed; and can obviously inhibit the harm of microorganisms; the high carbon dioxide and low oxygen can inhibit the respiration and maturation of fruits and vegetables, and the ethylene biosynthesis of fruits and vegetables is not inhibited, the ethylene biosynthesis is an aerobic process, and the oxygen content in the air is reduced, so that the process is influenced. The action of high carbon dioxide is generally considered to be a competitive inhibitor of ethylene action, and in addition, suitable high carbon dioxide and low oxygen can inhibit physiological diseases of certain fruits and vegetables, such as the research of reducing the incidence rate of apple tiger skin disease; the atmosphere generally contains 21 percent of oxygen and 0.03 percent of carbon dioxide, the fruits and vegetables can still maintain normal respiration even under the condition that the oxygen is greatly reduced, but the respiration is rapidly weakened when the oxygen content is lower than a limit, and the symptoms of hypoxia injury mainly comprise local collapse, browning and softening of epidermal tissues, incapability of being cooked normally and generation of wine flavor and peculiar smell. If the oxygen is extremely insufficient, anaerobic respiration is induced, the oxygen content of the air at the point of disappearance of anaerobic respiration is typically 1-5%, and in addition, the respiration of the fruit or vegetable is increased to promote after-ripening. Too high oxygen content (70% -100%) also causes toxicity to plants.
In the embodiment, when the temperature and humidity detected by the temperature and humidity camera 4 is 5 ℃ and the humidity is 60%, the range value of the carbon dioxide content in the refrigeration house is set to be 2% -3%, and the range value of the oxygen content is set to be 0.5% -2%; when the temperature detected by the temperature and humidity camera 4 is 10 ℃ and the humidity is 80%, the set range value of the carbon dioxide content in the refrigeration house is 2.5% -5.5%, and the set range value of the oxygen content is 1% -2.5%; when the temperature is 15 ℃ and the humidity is adjusted to be 95%, the set range value of the carbon dioxide content in the refrigeration house is 4% -6.5%, the set range value of the oxygen content is 2.0% -3.5%, the set range values are set according to the change of the product type, the temperature and the humidity, and can be set to other values, and the setting is not limited only here. Therefore, the content of carbon dioxide and oxygen can be correspondingly changed according to the change information of the temperature and the humidity in the refrigeration house, and the temperature and humidity infinite circulation wave value control, the temperature and temperature difference infinite circulation wave value control, the gas content monitoring and the ventilation device 3 are combined, so that the temperature, the humidity and the oxygen content in the refrigeration house are always in a circulation state, a normal and good temperature and humidity environment is ensured to exist in the refrigeration house, a product is always in a so-called 'dormant' state, and the activity of cells of the product is kept. Specifically, in the fruit and vegetable products, litchi can be kept fresh for 45 days, orange, Xinjiang small white apricot and the like can be kept fresh for 30 days, grapes can be kept fresh for 60 days, green-leaf vegetables can be kept fresh for 30 days, vegetable leaves can continuously sprout and grow new vegetable leaves, and vegetable flowers can continuously grow and bloom.
In this embodiment, the ventilation time may be preset, that is, the PLC controller 2 may preset a ventilation time node, and perform ventilation once every 12 hours, for example, 30 minutes each time, when the ventilation device 3 is started at zero point for the first ventilation and the second ventilation is started at 12 points, the infinite circulation ventilation control with a time difference of 12 hours is performed, the temperature of the refrigerator after ventilation is 20 ℃, and the water content of air per cubic meter is 17 g.
The working principle of the example is as follows: the detection device 1 detects content information of each gas (such as carbon dioxide, oxygen, methane, hydrogen sulfide, methyl mercaptan and methylamine) in the air in the refrigerator and sends the content information to the PLC 2; the PLC controller 2 receives the content information of the detection device 1, and controls the air interchanger 3 to start when the content information of the gas exceeds a gas content wave value; the ventilation device 3 discharges harmful gases (such as methane, hydrogen sulfide, methyl mercaptan and methylamine) in the cold storage, and simultaneously, fresh air is exchanged into the cold storage; after the ventilation of the ventilation device 3 is finished, sending a finishing instruction to the PLC controller 2, and controlling the detection device 1 to detect the content information of carbon dioxide and oxygen in the refrigeration house by the PLC controller 2; the detection device 1 sends the content information to the PLC controller 2, the PLC controller 2 is also connected with a temperature camera, the temperature and humidity camera 4 detects the temperature and humidity values in the refrigerator and sends the detection values to the PLC controller 2, the PLC controller 2 calculates corresponding gas content wave values by combining the received content information and temperature and humidity values of the detection device 1, and controls the gas regulating device 5 to regulate the content of carbon dioxide and oxygen in the refrigerator to be within a set range value; the temperature and humidity camera 4 is connected with the humidifying and dehumidifying equipment 6, when the temperature of the refrigeration house is reduced to 1 ℃ from 25 ℃, the humidifying and dehumidifying equipment 6 is automatically started and carries out humidification when the humidity value in the refrigeration house is less than 30%, then the humidifying and dehumidifying equipment 6 is automatically stopped and stops humidifying when the humidity value of the refrigeration house reaches 95%, and ventilation and dehumidification are carried out when the humidity exceeds 95%.
The invention has the advantages that:
1. the detection device, the PLC, the ventilation device, the temperature and humidity camera, the nitrogen generator 12, the humidification and dehumidification device 6, the temperature and temperature difference infinite circulation controller and other devices are combined for application, so that the content of carbon dioxide and oxygen can be correspondingly changed according to the change information of the temperature and the humidity in the refrigeration house, the temperature and humidity infinite circulation wave value control, the temperature and temperature difference infinite circulation wave value control and the gas content monitoring are combined with the ventilation device 3, the temperature and the humidity and the oxygen content in the refrigeration house are always in a circulation state, a normal and good temperature and humidity environment in the refrigeration house is ensured, the product is always in a so-called 'dormant' state, and the activity of cells of the product is kept.
2. The ventilation is performed every 12 hours by presetting a ventilation time node, every 30 minutes, for example, the ventilation device 3 is started at a zero point for the first ventilation, the second ventilation is started at a 12 point, the water content of air per cubic meter is 17g, the infinite circulation ventilation control with 12 hours of time difference is realized, and certain oxygen, moisture, temperature and humidity are kept in the refrigerating chamber.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. A wave band type ventilation system for adjusting gas content is applied to a refrigeration house and is characterized by comprising a detection device, a PLC (programmable logic controller), a ventilation device, a temperature and humidity camera and a gas adjusting device;
the detection device comprises: the system is used for detecting the content information of various gases in the refrigeration house and sending the content information of the gases to the PLC;
the air interchanger comprises: the gas in the cold storage is infinitely circularly exchanged with the gas outside the cold storage;
humiture camera: monitoring temperature and humidity information in the refrigeration house, and sending the temperature and humidity information to the PLC;
the PLC controller: receiving and processing the gas content information sent by the detection device, and controlling the air interchanger to be opened/closed; setting a gas content range value in the cold storage according to the temperature and humidity information sent by the temperature and humidity camera;
a gas conditioning device: and the controller is connected with the PLC, and the gas content in the refrigeration house is adjusted within a set gas content range value.
2. The band type ventilation system for adjusting gas content according to claim 1, wherein the detection device comprises a gas content sensor and a detection chip, one end of the detection chip is connected with the gas content sensor to detect gas content information, and the other end of the detection chip sends the detected gas content information to the PLC.
3. The band ventilation system for regulating gas content of claim 2, wherein the gas content sensor comprises a hydrogen sulfide sensor, a carbon dioxide sensor and an oxygen sensor independent of each other.
4. The band type ventilation system for adjusting gas content according to claim 2, wherein a gas content threshold is set in the PLC controller, the PLC controller determines whether the gas content information sent by the detection chip exceeds a gas content wave value, and controls the ventilation device to be turned on when the gas content information exceeds the gas content wave value, and controls the ventilation device to be turned off when the gas content information is smaller than the gas content wave value.
5. The band type ventilation system for adjusting gas content according to claim 1, wherein the ventilation device comprises a supply duct for supplying outside air into the refrigerator and an exhaust duct for exhausting harmful gas in the refrigerator from the refrigerator.
6. The band type ventilation system for adjusting gas content according to claim 5, wherein after ventilation of the ventilation device is completed, a ventilation completion instruction is sent to the PLC controller, and the PLC controller controls the detection device to detect the content information of carbon dioxide and oxygen in the refrigerator and feed back the content information of carbon dioxide and oxygen to the PLC controller.
7. The band type ventilation system for adjusting the gas content according to claim 6, wherein the PLC calculates and sets the range values of the carbon dioxide and oxygen content in the refrigerator according to the temperature and humidity information sent by the temperature and humidity camera and the carbon dioxide and oxygen content information fed back by the detection device.
8. The band type ventilation system for adjusting the gas content according to claim 7, wherein when the temperature and humidity detected by the temperature and humidity camera is 5 ℃ and the humidity is 60%, the range of the carbon dioxide content in the refrigerator is set to be 2% -3%, and the range of the oxygen content is set to be 0.5% -2%;
when the temperature detected by the temperature and humidity camera is 10 ℃ and the humidity is 80%, the set range value of the carbon dioxide content in the refrigeration house is 2.5% -5.5%, and the set range value of the oxygen content is 1% -2.5%;
when the temperature detected by the temperature and humidity camera is 15 ℃ and the humidity is adjusted to be 95%, the set range value of the carbon dioxide content in the refrigeration house is 4% -6.5%, and the set range value of the oxygen content is 2.0% -3.5%.
9. The band type ventilation system for adjusting gas content according to claim 7, wherein the gas adjusting device comprises a nitrogen generator 12 and an adjuster, one end of the adjuster is connected with the nitrogen generator 12, the other end of the adjuster is connected with the PLC controller, and the gas content in the refrigerator is adjusted within a set gas content range value.
10. The band type ventilation system for adjusting the gas content according to claim 1, further comprising an air cooling unit and/or a direct cooling unit, wherein the air cooling unit and/or the direct cooling unit is connected with the PLC, the PLC starts the air cooling unit and/or the direct cooling unit to perform refrigeration, the temperature is reduced to 1 ℃ after being reduced for 30 minutes, then the temperature is raised to 15 ℃ after being raised for 30 minutes, then the temperature is reduced to 1 ℃ at a rate of 0.5 ℃ per minute, and then the temperature is raised to 15 ℃ at a rate of 0.3 ℃ per minute, so that a dynamic infinite circulation control refrigeration of temperature and humidity with a temperature difference is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011148475.7A CN112268400A (en) | 2020-10-23 | 2020-10-23 | Wave band type ventilation system for adjusting gas content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011148475.7A CN112268400A (en) | 2020-10-23 | 2020-10-23 | Wave band type ventilation system for adjusting gas content |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112268400A true CN112268400A (en) | 2021-01-26 |
Family
ID=74341906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011148475.7A Pending CN112268400A (en) | 2020-10-23 | 2020-10-23 | Wave band type ventilation system for adjusting gas content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112268400A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050235658A1 (en) * | 2004-04-23 | 2005-10-27 | Carrier Corporation | Automatic fresh air exchange system |
| CN2745006Y (en) * | 2004-10-22 | 2005-12-07 | 上海鼎中保鲜科技有限公司 | Food fresh keeping refrigerating house |
| CN2920739Y (en) * | 2006-06-23 | 2007-07-11 | 倪品官 | Air regulating fruits and vegetables storing, transporting and preservation vehicle |
| CN201397003Y (en) * | 2008-08-06 | 2010-02-03 | 铜川新区胡杨农产品储藏设备有限公司 | Cavern gas-adjusted and fresh-preserved storehouse for fruit and vegetable |
| KR20130051056A (en) * | 2011-11-09 | 2013-05-20 | 이용님 | A longtime storage device for vegetable by controlled atmosphere |
| CN104824153A (en) * | 2015-04-15 | 2015-08-12 | 翟昕昕 | Chinese chestnut controlled atmosphere storage fresh-keeping technology |
| CN205455724U (en) * | 2015-12-31 | 2016-08-17 | 天津市凯润淡水养殖有限公司 | Freezer is transferred to fresh -keeping gas |
| CN205784214U (en) * | 2016-06-12 | 2016-12-07 | 开县郭辉燕柚子种植场 | A kind of extend the equipment that Fructus Citri grandis is fresh-keeping |
| CN106885423A (en) * | 2015-12-15 | 2017-06-23 | 重庆果然好农业开发有限公司 | Ventilating fruits and vegetables freezer |
| CN206861967U (en) * | 2017-04-14 | 2018-01-09 | 易门辰丰农产品开发有限公司 | A kind of intelligent fresh-keeping of vegetables freezer |
| CN108106324A (en) * | 2018-01-31 | 2018-06-01 | 王斌 | A kind of dynamic temperature, the temperature difference and Infinite Cyclic are without the fresh-keeping control system of ice |
| US20180310579A1 (en) * | 2017-04-27 | 2018-11-01 | Jiangnan University | System for controlling low temperature injury of cold-sensitive fruit vegetables by combining intelligent pre-cooling and segmented controlled atmosphere storage |
| CN108775767A (en) * | 2018-07-24 | 2018-11-09 | 中铁第四勘察设计院集团有限公司 | A kind of freezer gas monitor and cleaning systems and method |
| CN111503970A (en) * | 2020-04-17 | 2020-08-07 | 山东昊坤果业有限公司 | Intelligent fruit and vegetable fresh-keeping warehouse and method for sweet potato fresh-keeping storage by using same |
-
2020
- 2020-10-23 CN CN202011148475.7A patent/CN112268400A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050235658A1 (en) * | 2004-04-23 | 2005-10-27 | Carrier Corporation | Automatic fresh air exchange system |
| CN2745006Y (en) * | 2004-10-22 | 2005-12-07 | 上海鼎中保鲜科技有限公司 | Food fresh keeping refrigerating house |
| CN2920739Y (en) * | 2006-06-23 | 2007-07-11 | 倪品官 | Air regulating fruits and vegetables storing, transporting and preservation vehicle |
| CN201397003Y (en) * | 2008-08-06 | 2010-02-03 | 铜川新区胡杨农产品储藏设备有限公司 | Cavern gas-adjusted and fresh-preserved storehouse for fruit and vegetable |
| KR20130051056A (en) * | 2011-11-09 | 2013-05-20 | 이용님 | A longtime storage device for vegetable by controlled atmosphere |
| CN104824153A (en) * | 2015-04-15 | 2015-08-12 | 翟昕昕 | Chinese chestnut controlled atmosphere storage fresh-keeping technology |
| CN106885423A (en) * | 2015-12-15 | 2017-06-23 | 重庆果然好农业开发有限公司 | Ventilating fruits and vegetables freezer |
| CN205455724U (en) * | 2015-12-31 | 2016-08-17 | 天津市凯润淡水养殖有限公司 | Freezer is transferred to fresh -keeping gas |
| CN205784214U (en) * | 2016-06-12 | 2016-12-07 | 开县郭辉燕柚子种植场 | A kind of extend the equipment that Fructus Citri grandis is fresh-keeping |
| CN206861967U (en) * | 2017-04-14 | 2018-01-09 | 易门辰丰农产品开发有限公司 | A kind of intelligent fresh-keeping of vegetables freezer |
| US20180310579A1 (en) * | 2017-04-27 | 2018-11-01 | Jiangnan University | System for controlling low temperature injury of cold-sensitive fruit vegetables by combining intelligent pre-cooling and segmented controlled atmosphere storage |
| CN108106324A (en) * | 2018-01-31 | 2018-06-01 | 王斌 | A kind of dynamic temperature, the temperature difference and Infinite Cyclic are without the fresh-keeping control system of ice |
| CN108775767A (en) * | 2018-07-24 | 2018-11-09 | 中铁第四勘察设计院集团有限公司 | A kind of freezer gas monitor and cleaning systems and method |
| CN111503970A (en) * | 2020-04-17 | 2020-08-07 | 山东昊坤果业有限公司 | Intelligent fruit and vegetable fresh-keeping warehouse and method for sweet potato fresh-keeping storage by using same |
Non-Patent Citations (2)
| Title |
|---|
| 中国农学会: "《2016-201农业科学学科发展报告（基础农学）》", 1 January 2018, 中国科学技术出版社 * |
| 王茂春: "《农产品仓储与运输管理实操》", 1 May 2018, 贵州大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10966435B2 (en) | System for controlling low temperature injury of cold-sensitive fruit vegetables by combining intelligent pre-cooling and segmented controlled atmosphere storage | |
| US3102777A (en) | Apparatus and method of preserving animal and plant materials | |
| CN102835449B (en) | Preservation method for Lingwu long jujube by phase temperature air condition | |
| EP3430908A1 (en) | Method for preservation of fresh plants by vacuum pre-cooling synchronously combined with modified atmosphere technique | |
| CN1294818C (en) | Three-stage pressure-reducing preservation method for long-term storage of perishable fruits and vegetable | |
| CN103609666B (en) | Physical honey peach storage method | |
| Barkai-Golan | Postharvest disease suppression by atmospheric modifications | |
| CN205106213U (en) | Fruit vegetables store atmosphere preservation device of usefulness | |
| CN101258869A (en) | Preservation fresh-keeping method for white gold needle mushroom | |
| CN110810499A (en) | Method for prolonging shelf life of fruits and vegetables by combining laser drilling and micropore adjustment with modified atmosphere packaging breathing model | |
| CN205106215U (en) | Fruit vegetables system that preserves with function is transferred to gas | |
| Stiles | Scientific principles of controlled/modified atmosphere packaging | |
| CN102771548B (en) | Method for suppressing browning of Wujiuxiang pear fruit | |
| CN104068103B (en) | The air regulating fresh-keeping method of a kind of strawberry | |
| CN101228892A (en) | Combined mushroom fresh-keeping method of paint film, ozone pretreatment and microporous film modified atmosphere packaging | |
| CN201028911Y (en) | Automatic gas composition adjustable fresh-keeping refrigerator | |
| CN112304000A (en) | Temperature and humidity dynamic circulation control system for fruit and vegetable product cold storage | |
| US3102779A (en) | Apparatus and method of preserving animal and plant materials | |
| CN104824153A (en) | Chinese chestnut controlled atmosphere storage fresh-keeping technology | |
| CN112268400A (en) | Wave band type ventilation system for adjusting gas content | |
| CN109793043B (en) | Loquat deoxidation packaging preservation method | |
| CN205106214U (en) | Mix humidification fruit vegetables atmosphere preservation system in advance | |
| CN112753757B (en) | Low-temperature sterilization and air-conditioning integrated fruit and vegetable fresh-keeping method | |
| CN212116900U (en) | Fruit vegetables cell fresh-keeping storehouse of congealing time | |
| CN101213986B (en) | Three-segment composite processing method for prolonging sea water vegetable fresh-keeping time |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230410 Address after: Room 401, Building 2, No. 110 Longkun South Road, Longhua District, Haikou City, Hainan Province, 570100 Applicant after: Wang Bin Applicant after: Wang Jiahui Address before: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Applicant before: Zuihao technology operation (Shenzhen) Group Co.,Ltd. |
|
| TA01 | Transfer of patent application right |