CN205375232U - Accurate low temperature storage grain bin combination formula temperature control system based on phase change material - Google Patents
Accurate low temperature storage grain bin combination formula temperature control system based on phase change material Download PDFInfo
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- CN205375232U CN205375232U CN201620116540.0U CN201620116540U CN205375232U CN 205375232 U CN205375232 U CN 205375232U CN 201620116540 U CN201620116540 U CN 201620116540U CN 205375232 U CN205375232 U CN 205375232U
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Abstract
The utility model relates to an accurate low temperature storage grain bin combination formula temperature control system based on phase change material, the structure is: industrial computer control system, grain feelings detecting system, mechanical ventilation system and ventilation window, storage grain bin hole adopt thermal -insulated sealed processing of heat preservation, make storage grain bin inside reach airtight state, the lower part of pushing up at storage grain bin is equipped with the light gauge steel furred ceiling, splits into two independent spaces with the storage grain bin inner space, lays phase change material energy storing board at light gauge steel furred ceiling upper surface, phase change material energy storage pad is laid to grain upper surface in storage grain bin, be equipped with the air conditioner on the inner wall of storage grain bin wall, the air conditioner is connected with industrial computer control system. In this system ought to use phase change material heat interpreter storage grain bin, utilize phase change material's latent heat of phase change to the storage and the release of cold energy, make and store up the grain temperature and remain throughout at accurate low temperature state, reached safe requirement of spending the summer, realize that accurate low temperature storage grain bin is high -efficient, the accuse temperature is kept apart to low -cost combination formula.
Description
Technical field
This utility model relates to a kind of machine aeration storehouse Combined temperature controlling system based on phase-change material, belongs to foodstuff preservation field.
Background technology
" bread is the staff of life ", grain is the basic living data of the human society survival and development, is the special strategic materials of national economy of stabilizing the market, ensure.Grain security is one of focus of whole world concern, is the major issue being related to national economy, is the important foundation realizing economic development, social stability and national security.China is a large agricultural country having 1,300,000,000 populations, 900,000,000 peasants, is also grain-production and consumption big country, and there is more deep intension in China by grain security.China is just considered as " weight of state is precious ", " matter of fundamental importance in the world " grain from ancient times, attaches great importance to savings and the deposit of grain.Food Security is paid much attention to by the Party Central Committee, State Council especially always, the requirement of " guaranteeing national food security " is just clearly proposed in Chinese Communist Party's the 17th Session of the General Assembly report, in recent years, put into effect a series of strong support policy, promote that grain increases production year after year, serve basic guarantee effect for economic society overall situation.State Council in 2014 determines and establishes and improve grain security governor's responsibility system, specify the grain security responsibility of people's government at the provincial level, require that (district, the city) People's Government of each province must bear the main body responsibility ensureing this area grain security conscientiously, strengthen grain-production, deposit and negotiability construction comprehensively.In today that science and technology develops rapidly, doing the storage management of grain ecology well, allow grain loss be reduced to bottom line, it is very urgent and necessary for meeting people to the requirement that grain quality is increasingly higher.
Each developed country of the world has been carried out a lot of research and application in grain ecology storage, as the countries such as the U.S., Canada, France utilize natural low temperature to lower the temperature in conjunction with paddy drying technology, substantially achieves ecological grain storage.
China has been carried out more deep research in ecological grain storage.Low-temperature grain-storage represents the developing direction of following View of Grain Storage Technoiogy, because low-temperature grain-storage not only can suppress the respiratory metabolism of grain, delay grain quality ageing, effectively keep vitality and the freshness of grain, reduce grain storage loss, also can effectively control grain storage pest and the activity of microorganism, harm, do not use or reduce use chemical agent, be conducive to keeping grain health, reduce environmental pollution.
For a long time, low-temperature grain-storage has been carried out substantial amounts of research work by China Food technology worker, design and transformation such as low temperature silo, adopt warehouse external spray reflectorized material, warehouse furred ceiling, install the methods such as heat-barrier material additional and improve the heat-proof quality in warehouse, rise by various grain faces gland controlling measurement grain temperature, various places utilize natural environmental condition to pass through gravity-flow ventilation or force ventilation reduces grain temperature, particularly introduce in newly-built silo in recent years and apply grain cooling machine, these are all realize safer in China different regions, economical, effective low-temperature grain-storage technology has established important basis.But these low-temperature grain-storage technology common problems have: one is storehouse temperature height summer and autumn, and grain heap upper strata easily condenses, generates heat；Two is that upper strata grain edible quality declines substantially；Three is that grain storage energy consumption is high, investment is big, intractability is big.Wherein: silo retrofit cost is big, restricted many；Warehouse external spray reflectorized material or cost be high or weak effect or service life short；Warehouse furred ceiling, install the method warehouse such as heat-barrier material heat-proof quality additional and improve not ideal；The gland measure of grain face has a definite limitation；Natural low temperature storage utilizes natural cooling source, and restriction is relatively big, weak effect；Force ventilation cryopreservation natural cooling source, mechanism, restricted, costly；Grain storehouse natural low temperature is aeration-cooling stores mechanical refrigeration in conjunction with paddy drying technology storage with mechanical refrigeration and air conditioner low temperature, and warehouse sealing requirements is high, costly.Thus the popularization and application of low-temperature grain-storage technology are restricted, apply also less.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of machine aeration storehouse Combined temperature controlling system based on phase-change material, phase-change material heat switching mechanism is applied in grain storehouse by this system, by warehouse furred ceiling, heat-barrier material, grain face gland, natural low temperature, force ventilation and air conditioner low temperature storage carry out subregion, layering organic assembling, the phase-change material of different melting points is placed in different humidity provinces, utilize the latent heat of phase change of phase-change material to the storage of cold energy and release, ensure that grain temperature control in temperature higher summer at 15 DEG C～20 DEG C (< 20 DEG C), grain storage temperature is made to remain at quasi-low temperature state, reach safety and cross the requirement in summer, realize machine aeration storehouse efficient, low cost combination type isolation temperature control.
For solving problem above, concrete technical scheme of the present utility model is as follows: a kind of machine aeration storehouse Combined temperature controlling system based on phase-change material, system, grain inspection system, mechanical ventilation system and vent window is controlled including industrial computer, industrial computer control system is connected realization with grain inspection system, mechanical ventilation system and vent window respectively and automatically controls, grain storehouse hole adopts insulation encapsulation process, makes to reach inside grain storehouse air-tight state；Being provided with steel joist suspended ceiling in the bottom on grain storehouse top, grain storehouse inner space is divided into two independent spaces in upper pyrometer district and room temperature district, bottom by steel joist suspended ceiling, lays phase-change material energy storage plate at steel joist suspended ceiling upper surface；Grain upper surface in grain storehouse lays phase-change material energy storage pad；Being provided with air conditioner on the inwall of the grain storage bulkhead below steel joist suspended ceiling, air conditioner controls system with industrial computer and is connected.
The outer surface on described grain storehouse top arranges heat-reflecting insulating coating, and the inner surface on grain storehouse top arranges polyurethane insulation coating.
The fusing point of described phase-change material energy storage plate is 22 DEG C；The fusing point of phase-change material energy storage pad is 18 DEG C.
Should based on the machine aeration storehouse Combined temperature controlling system of phase-change material based on phase-change material hot-cast socket mechanism, steel joist suspended ceiling is set in grain storehouse, and the phase-change material of different melting points is placed at steel joist suspended ceiling upper surface and grain face, realize the subregion of grain storehouse, layering organic assembling, and pass through vent window, mechanical ventilation system aeration-cooling and and air conditioner refrigeration, complete storage and the release of phase-change material cold energy, ensure that grain temperature control in temperature higher summer at 15 DEG C～20 DEG C (< 20 DEG C), grain storage temperature is made to remain at quasi-low temperature state, reach safety and cross the requirement in summer, realize machine aeration storehouse efficient, low cost combination type isolation temperature control.
Heat-reflecting insulating coating is set outside grain storehouse, not only low cost, high-environmental, good heat-insulation effect and also have water-tight corrosion-proof function concurrently, gentleness top layer, storehouse grain temperature can be efficiently controlled with the amplitude that the temperature rises, create good condition for realizing machine aeration；The inner surface on grain storehouse top arranges polyurethane insulation coating, increases effect of heat insulation further, it is prevented that with the heat exchange of external heat in grain storehouse.
The fusing point of described phase-change material energy storage plate is 22 DEG C, degree of supercooling < 4 DEG C, the latent heat of phase change of phase-change material energy storage plate absorbs the heat in space, grain storehouse high-temperature region, keep this space temperature≤22 DEG C, and ensure room temperature district temperature < 20 DEG C；The fusing point of phase-change material energy storage pad is 18 DEG C, degree of supercooling < 4 DEG C, absorb the heat in space, room temperature district, keep this space temperature≤18 DEG C, the energy storage heat exchange of phase-change material guarantees that whole grain storehouse is in machine aeration scope, the during summer high temperature cold energy of refrigeration plant is greatly reduced supplement simultaneously, is substantially reduced material cost and the operating cost of grain storehouse.
Adopt the described machine aeration storehouse Combined temperature controlling system based on phase-change material to the temperature controlled method of grain storehouse, industrial computer is adopted to control system by the data of grain inspection system collection are analyzed, automatic shutter vent window, automatically run mechanical ventilation system or grain is lowered the temperature by air conditioner, achieve intellectuality, save the energy, reduce operating cost and labor intensity, improve the economic benefit of labor productivity and enterprise, ensure that grain storage temperature remains at quasi-low temperature state (< 20 DEG C), reach safety, the requirement of Green Grain Storage, walk out the low-temperature grain-storage new approach having popularity meaning of an applicable China's national situation.
Accompanying drawing explanation
Fig. 1 is the structure diagram of the machine aeration storehouse Combined temperature controlling system based on phase-change material.
Fig. 2 is as the criterion the enforcement steps flow chart of low temperature temperature control system and method.
Detailed description of the invention
As shown in Figure 1, a kind of machine aeration storehouse Combined temperature controlling system based on phase-change material, system is controlled including industrial computer, grain inspection system, mechanical ventilation system and vent window 7, industrial computer control system respectively with grain inspection system, mechanical ventilation system and vent window 7 connect realization and automatically control, grain storehouse hole is carried out insulation encapsulation process, concrete by the door and window hole 1 of grain storehouse, the holes such as grain port 13 and vent are respectively with the thick fire-retardant benzene plate of 80mm, sealing joint strip, the measures such as Polypropylence Sheet carry out insulation process, make to be in inside warehouse air-tight state, to prevent air's exchange inside and outside storehouse, make to reach inside grain storehouse air-tight state；Be provided with steel joist suspended ceiling 6 in the bottom on grain storehouse top 3, grain storehouse inner space is divided into two independent spaces in upper pyrometer district and room temperature district, bottom by steel joist suspended ceiling 6, lays phase-change material energy storage plate 5 at steel joist suspended ceiling 6 upper surface；Grain 11 upper surface in grain storehouse lays phase-change material energy storage pad 10, and wherein the fusing point of phase-change material energy storage plate 5 is 22 DEG C；The fusing point of phase-change material energy storage pad 10 is 18 DEG C；This temperature control system adopts grain face superjacent air space in grain storehouse to carry out furred ceiling segmentation, below grain storehouse top, 300mm place carries out light steel keel gypsum board furred ceiling 6, space in storehouse is rationally split, plasterboard superjacent air space temperature is of a relatively high and plasterboard underlying space temperature is relatively low, it is divided into separate space to be easy to temperature adjusting in space, warehouse, simultaneously work as heat insulating effect, and do the support of phase-change energy storage plate.Light steel keel gypsum board furred ceiling upper and lower puts phase-change material energy storage plate and the energy-storing pad of different melting points respectively, light steel keel gypsum board furred ceiling 6 is put the phase-change energy storage plate 5 encapsulating the inorganic phase-changing material that fusing point is 22 DEG C with high density polyethylene (HDPE), light steel keel gypsum board furred ceiling 6 superjacent air space temperature can be kept less than 22 DEG C at 1 month when the highest average daily ambient air temperature is less than 30 DEG C, and light steel keel gypsum board furred ceiling 6 underlying space temperature can be made less than 18 DEG C, relatively small closing space and relative with the outdoor temperature difference little time can significantly save material cost；And the phase-change accumulation energy pad 10 of the organic phase change material that upper press cover terylene composite PVC fabric encapsulation fusing point in grain face is 18 DEG C guarantees that whole grain storehouse space is in machine aeration scope, cold energy when summer high temperature is simultaneously greatly reduced is supplemented, and is substantially reduced material cost and the operating cost of grain storehouse.nullThe inwall of the grain storage bulkhead 9 below steel joist suspended ceiling 6 is provided with air conditioner 8，Air conditioner 8 controls system with industrial computer and is connected，The bulkhead that warehouse pushes up plaster tablet suspended ceiling 6 as far as possible near storehouse hangs air conditioner 8，Model can adopt Gree convertible frequency air-conditioner KFR-32GW (32583)/FN-A3 type 1.5P，To prevent the cold wind of blowout from air-conditioner from directly contacting grain face and producing condensation，Supplementary cold energy during air conditioner 6 temperature very hot for summer，When in summer storehouse, light steel keel gypsum board furred ceiling 6 underlying space temperature is more than 20 DEG C，Air conditioner consumption valley power is started in the low power consumption period at night，Reduce storehouse temperature and upper strata grain temperature and complete the phase transition energy transformation process of grain face gland phase-change material，In control storehouse, temperature is below 20 DEG C，Air conditioner 6 is consumed valley power and the purchase cost of phase-change material had both been greatly reduced is greatly reduced the operating cost of system.
Storehouse top heat conduction is the main cause of storehouse temperature, the rising of grain temperature, outer surface on grain storehouse top 3 arranges heat-reflecting insulating coating 2, coating thickness is the solar heat reflecting and heat insulating coating 2 of 0.2mm～0.3mm, low cost, high-environmental, good heat-insulation effect, have water-tight corrosion-proof function concurrently, gentleness top layer, storehouse grain temperature can be efficiently controlled with the amplitude that the temperature rises, create good condition for realizing machine aeration；The inner surface on grain storehouse top 3 arranges 50mm thickness polyurethane insulation coating 4, increases effect of heat insulation.
As in figure 2 it is shown, adopt the described machine aeration storehouse Combined temperature controlling system based on phase-change material to the temperature controlled method of grain storehouse, comprise the following steps:
1) industrial computer obtains the storehouse benign environment temperature in real-time grain temperature, the storehouse temperature in upper pyrometer district, room temperature district, bottom by grain inspection system；
2) real time data obtained is carried out Macro or mass analysis, formation temperature historical data base, real-time grain temperature, storehouse benign environment temperature are carried out mathematical calculation and analysis, many group grain temperature, storehouse benign environment temperature record are averaged, calculates mean temperature at that time；
3) drive the clock module in industrial computer, read the value of present clock, carry out the judgement of time, according to the numerical control vent window of grain gentleness storehouse temperature, mechanical ventilation system or operation of air-conditioner；
3.1) aeration-cooling: when grain temperature is lower than 15 DEG C, when room temperature district, bottom temperature is between 18 DEG C～20 DEG C, if minimum ambient air temperature is lower than 18 DEG C in one day, then in ambient air temperature time period lower than 18 DEG C at night, open grain storehouse vent window to ventilate, allow phase-change energy storage plate, cold energy in the absorption of phase-change accumulation energy pad stored air, complete phase-change material energy storage heat exchanging process, the cold energy stored then is discharged when the temperature rises by day, utilize the latent heat of phase change of phase-change material to the storage of cold energy and release, and by storehouse temperature control below 18 DEG C, make grain temperature whole day lower than 15 DEG C；
3.2) refrigeration temperature control: when grain temperature is higher than 15 DEG C, and room temperature district, bottom temperature higher than 20 DEG C time, in the low power consumption period at night, control air conditioner consumption valley power in system start-up storehouse by industrial computer and supplement cold energy, room temperature district, grain storehouse bottom temperature is down to less than 15 DEG C, also reduce the temperature in upper pyrometer district simultaneously, phase-change material plate, phase-change material pad absorbs and stores the cold energy that air conditioner provides, until completing the storage heat exchange of phase-change material energy, and at the out-of-work time period phase-change material plate of air conditioner, phase-change material pad discharges the cold energy stored, utilize the latent heat of phase change of the phase-change material temperature range to the quasi-low temperature that the storage of cold energy makes grain temperature control below 20 DEG C with release；
3.3) in other circumstances, controlled manually by the human-computer interaction interface of industrial computer control system according to the actual requirements, start mechanical ventilation system or air conditioner is aerated, lowers the temperature；
4) what industrial computer controlled system employing is a closed loop control, by the real-time monitoring grain temperature of grain inspection system, storehouse benign environment temperature, the control being correlated with is carried out according to each temperature value, if grain gentleness storehouse temperature reaches predetermined temperature, close vent window, mechanical ventilation system or air conditioner, persistently maintain step 1) to 3) monitoring and control.
Described step 3.3) other situations include: biannual Grain Ventilation, it is once open mechanical ventilation system after conveying grain into storehouse to ventilate, balance cereal temperature and moisture, another time is to open mechanical ventilation system about December to ventilate, below grain temperature drop to 0 DEG C.
The machine aeration storehouse Combined temperature controlling system and method based on phase-change material of the application has the advantage that
1) COMBINED PROCESS such as warehouse external spray reflectorized material, warehouse furred ceiling, heat-barrier material, grain face gland, natural low temperature, force ventilation and air-conditioning temperature control are adopted, subregion isolation is carried out according to high-temperature region, room temperature district, it is combined formula layered temperature control by placing the phase-change material of different melting points, realize machine aeration storehouse efficiently, low cost combination type isolation temperature control, ensure that grain temperature control in temperature higher summer at 15 DEG C～20 DEG C (< 20 DEG C), make grain storage temperature remain at quasi-low temperature state, reach safety and cross the requirement in summer；
2) phase-change material being applied to foodstuff preservation field first, it is achieved that quasi-low-temperature grain is stored, the fusing point adjusting phase-change material also can realize low-temperature grain storage；
3) grain storehouse space carrying out subregion, layering first, the phase-change material placing different melting points is combined formula layered temperature control, it is achieved relatively low material acquisition cost, good temperature control effect；
4) air conditioner and phase-change material are combined temperature control, reduce the purchase cost of phase-change material, and whole system has good economy；
5) based on phase-change material hot-cast socket mechanism, make full use of the spring, autumn big, the feature that nocturnal temperature is low of day and night temperature, the cold energy of air is carried out storing and discharges by the latent heat of phase change utilizing phase-change material, the physical state completing phase-change material converts, under unpowered conditions, Effective Regulation grain storehouse temperature, it is achieved machine aeration, effectively reduces system operation cost；
6) starting air conditioner consumption valley power in the low power consumption period at night, the purchase cost that phase-change material had both been greatly reduced is greatly reduced the operating cost of system；
7) control system with industrial computer and connect grain inspection system, mechanical ventilation system, air conditioner and vent window for core, by wireless transport module far-end can be monitored and control, complete the function such as the condition monitoring to equipment such as far-end grain inspection system, mechanical ventilation system, air conditioners and diagnosis maintenance.
Claims (3)
1. the machine aeration storehouse Combined temperature controlling system based on phase-change material, system, grain inspection system, mechanical ventilation system and vent window (7) is controlled including industrial computer, industrial computer control system is connected realization with grain inspection system, mechanical ventilation system and vent window respectively and automatically controls, it is characterized in that: grain storehouse hole adopts insulation encapsulation process, makes to reach inside grain storehouse air-tight state；It is provided with steel joist suspended ceiling (6) in the bottom of grain storehouse top (3), grain storehouse inner space is divided into two independent spaces in upper pyrometer district and room temperature district, bottom by steel joist suspended ceiling (6), lays phase-change material energy storage plate (5) at steel joist suspended ceiling (6) upper surface；Grain (11) upper surface in grain storehouse lays phase-change material energy storage pad (10)；Being provided with air conditioner (8) on the inwall near the grain storage bulkhead (9) of steel joist suspended ceiling (6) lower section, air conditioner (8) controls system with industrial computer and is connected.
2. the machine aeration storehouse Combined temperature controlling system based on phase-change material as claimed in claim 1, it is characterized in that: the outer surface on described grain storehouse top (3) arranges heat-reflecting insulating coating (2), and the inner surface of grain storehouse top (3) arranges polyurethane insulation coating (4).
3. the machine aeration storehouse Combined temperature controlling system based on phase-change material as claimed in claim 1 or 2, it is characterised in that: the fusing point of described phase-change material energy storage plate (5) is 22 DEG C；The fusing point of phase-change material energy storage pad (10) is 18 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105528001A (en) * | 2016-02-05 | 2016-04-27 | 辽宁省粮食科学研究所 | Quasi-low-temperature grain storage warehouse combined type temperature control system and method based on phase-changing materials |
| CN107772906A (en) * | 2016-08-30 | 2018-03-09 | 朱杰 | It is cold/to warm up dual-purpose temp.-regulating mattress |
| CN109892118A (en) * | 2017-12-07 | 2019-06-18 | 湖南粮食集团有限责任公司 | A kind of conveying grain into storehouse storage method and its silo |
-
2016
- 2016-02-05 CN CN201620116540.0U patent/CN205375232U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105528001A (en) * | 2016-02-05 | 2016-04-27 | 辽宁省粮食科学研究所 | Quasi-low-temperature grain storage warehouse combined type temperature control system and method based on phase-changing materials |
| CN107772906A (en) * | 2016-08-30 | 2018-03-09 | 朱杰 | It is cold/to warm up dual-purpose temp.-regulating mattress |
| CN109892118A (en) * | 2017-12-07 | 2019-06-18 | 湖南粮食集团有限责任公司 | A kind of conveying grain into storehouse storage method and its silo |
| CN109892118B (en) * | 2017-12-07 | 2021-03-02 | 湖南粮食集团有限责任公司 | Grain warehousing storage method and granary thereof |
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