CN1049092C - Pressure-reducing fresh-keeping storage system and its device - Google Patents
Pressure-reducing fresh-keeping storage system and its device Download PDFInfo
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- CN1049092C CN1049092C CN95105879A CN95105879A CN1049092C CN 1049092 C CN1049092 C CN 1049092C CN 95105879 A CN95105879 A CN 95105879A CN 95105879 A CN95105879 A CN 95105879A CN 1049092 C CN1049092 C CN 1049092C
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Abstract
The present invention provides a pressure reducing fresh keeping storage system and an apparatus thereof. The pressure reducing fresh keeping storage system comprises a refrigerating part, a pressure reducing part, a storage and a regulation part. The present invention integrates the functions of rapid deoxydization, quick freezing in vacuum, high-temperature storage and preservation, and low temperature and oxygen cold storage. Each working condition can quickly replace the multiple functions of preservation and cold storage. The pressure reducing fresh keeping storage system adopts pure low oxygen and has no residue of toxic ozone or environmental gas atmosphere of saturated high-temperature air to implement the fresh keeping storage of fruit, vegetable, flower and plant across quarters at high temperature (0 DEG C to 15 DEG C). The pressure reducing fresh keeping storage system uses vacuum quick-freezing, low-temperature (-28 DEG C to-33 DEG C), and low oxygen to realize long term storage and cold storage. The pressure reducing fresh keeping storage system can be built into a large scale and automatic regulation pressure reducing fresh keeping storage facility in industrialization, and can also be built into a movable container type fresh keeping storage apparatus.
Description
The present invention relates to a kind of pressure-reducing fresh-keeping storage system, be particularly suitable for fruits and vegetables, flowers, plant class and marine product, meat poultry industrialization long-period freshness preserving and quick freezing and cold preserving, belong to the storage technique field of human lives's product.
At present, the method and apparatus of fruit and vegetable fresh preservation is more, as controlled atmosphere, usually claim the CA storage, its principal mode is to utilize mechanically refrigerated airtight storage storehouse, adapted controlled atmosphere and refrigeration plant, make the certain low temperature of maintenance in the storage storehouse, hypoxemia, suitable carbon dioxide and humidity, and in time get rid of the pernicious gas that produces in the storage storehouse, thus reduce the respiratory rate of storage thing, to reach the purpose that postpones after-ripening, preservation and freshness.But the shortcoming of its method is not have the packing controlled atmosphere in big storage storehouse, causes fruits and vegetables ' dehydration, disorder easily, produces the after-ripening inequality, loses its relish and fragrance; And the inner wrapping controlled atmosphere causes rotten because airtight high humidity is airtight easily.
U.S. Hercules Inc is " controlled atmospheric packing film " at a name of patent application of China, and application number is CN87107591A, and the packing container of a kind of air conditioned storage fresh fruit and vegetables is provided, and is by regulating CO
2To O
2Ratio improve the freshness of fruits and vegetables.It is on impervious container basically, and a restriction CO is set
2And O
2The ambiance in the container is controlled in infiltrative zone.The size in this zone is its penetrating power, the amount of content and storage thing respiratory rate and desired CO
2To O
2The function of ratio.This method and container be the short-term fresh-keeping and storing on a small quantity, is not suitable for extensive, industrialization long-period freshness preserving storage.
A name of patent application of Tsing-Hua University is " automatically control self start type air-conditioned cold store ", and application number is CN85200033U, provide a kind of automatic control, can O
2Concentration is 1～20%, CO
2The self start type controlled atmosphere device that concentration is regulated arbitrarily in 0.2～18% scope is in the hope of replacing mechanical air-conditioned cold store.Be about to fruits and vegetables and be placed in the closed container of variable volume, the on-off control valve door is housed, on the container respectively with CO
2Selectivity is ventilative to link to each other with air distributing device, by adjuster control, according to CO
2And O
2The concentration tester output signal of telecommunication carries out controlled atmosphere.But the shortcoming of this air-conditioned cold store is: what of storage thing amount are bigger to oxygen concentration decrease speed influence in the storehouse.Storage thing amount is few, and it is slow to fall oxygen speed, and storage storehouse utilization rate is low, and the oxygen concentration during artificial inbound/outbound process in the storehouse needs in time to adjust, and it is bigger fluctuate, and the inbound/outbound process of storage thing operates inconveniently, and labour intensity is big.
The purpose of this invention is to provide a kind of industrialization pressure-reducing fresh-keeping storage system that gives cold, high temperature fresh-keeping and quick freezing and cold preserving that integrates, adopt pure hypoxemia, the ambiance that the air of the poisonous ozone of noresidue, saturated high humidity forms, realization fruits and vegetables, flowers, plant class are striden season high temperature pressure-reducing fresh-keeping storage; Adopt vacuum quick-frozen, low temperature, hypoxemia to realize the refrigeration of storage thing super-long-term.
Pressure-reducing fresh-keeping storage system of the present invention comprises refrigeration, decompression, storage storehouse and regulated and control for four most of compositions.
Refrigerating part is to adopt pump refrigerant " to go out " cycle refrigeration system on advancing down, and its process is: cold-producing medium enters under throttle valve control in the low pressure recycle liquid receiver, regulates the station by being pumped into liquid phase.According to regulation and control instruction feed flow refrigeration in basin, the heat absorption of refrigeration piping evaporation in tank wall and basin and the gas and the refrigerant liquid that produce flow out basin in the same way, enter gas phase through the constant voltage main valve and regulate the station, with and return the low pressure recycle liquid receiver and carry out gas-liquid and be separated.Liquid phase falls in the basin according to gravity, and gas phase is compressed into high pressure draught by the compressor sucking-off, and entering condenser condenses is highly pressurised liquid, and it is temporary to enter the high pressure liquid receiver according to gravity.Change and low pressure recycle liquid receiver inner refrigerant liquid level height according to system condition, regulate by the choke valve feed flow by control valve.
Be to strengthen the cooling of cold-trap accessory system, can regulate the station by liquid phase and provide refrigerating fluid to two cold-traps, the gas that produces through cold-trap heat absorption evaporation returns gas phase with refrigerating fluid through constant pressure valve and regulates the station, with and enter and carry out the gas-liquid two-phase separation in the low pressure recycle liquid receiver.
The decompression part is to adopt vacuum machine assembly air-exhausting and cold-trap condensation and humidification.Its process is: when the cold-peace quick-frozen is given in system's execution, start vavuum pump, open and bleed and drain tap, pumped down is to giving the temperature required corresponding pressure of cold-peace quick-frozen.For preventing that the water in the gas bleeding enters vavuum pump in the basin, just establish a condensation cold-trap that has a refrigerating evaporator, the water in the gas bleeding is removed in this condensation, be to get rid of the pernicious gas CO that produces in the basin
2, ethene, acetaldehyde, ethanol, a---disadvantage factor such as Fa Nixi and avoid storing the thing dehydration, wilt and need constantly replenishing fresh air, just establish a humidification cold-trap that does not freeze water and refrigerating evaporator that fills the certain liquid height, in basin, provide saturated highly humid air through control valve, discharge the waste gas that produces in the basin by extraction valve and air bleeding valve simultaneously, thereby reach the dynamic equilibrium of fresh-keeping required low oxygen concentration in the basin.For preventing rotting of basin storage thing, also be provided with an ozone generator, ozone and anion are provided in basin.Because ozone and anion have the harmful waste that produces in the respiration that suppresses fruits and vegetables and the oxidation fruits and vegetables metabolic process, to storage environment and storage thing carry out the sterilization of pressure permeation formula, sterilization is anticorrosion.
The storage storehouse is that a steel shell, two ends are the cylindrical container of conical end socket.Be arranged with horizontal two row S shape pipelines (double as storage thing is put shelf) in the jar inner cylindrical section, be provided with several equidistantly vertical endless tube, standpipe chord pipes of arranging along jar length direction, be provided with two last lower collector pipe that run through the basin total length in the position up and down near jar inwall, two terminal circle conical head inwall is provided with convergent footpath endless tube.Each pipeline is interconnected in jar, imports and exports to be communicated with the refrigeration system pipeline by by-pass valve control.Basin end socket two tops (or other positions) are provided with the movable sealing door of storage thing turnover, and (or other positions) are equipped with observation window on door, also are provided with one in the basin and transport storage thing turnover swinging belt or crawler belt transmission conveying appliance.
Regulation and control parts is to adopt the telemetering type Pressure gauge, the pressure of each test point is changed converting analog signal to, passes to the regulation and control centring system by signals collecting and does logic analysis, and optimum operation is made in control each system at a high speed.
Pressure-reducing fresh-keeping storage system of the present invention can be constructed on a large scale, the storage facilities of auto-control, also can build up the movably cold basin of container-type.
Pressure-reducing fresh-keeping storage of the present invention follows these steps to realize:
1. reduce the density of air in the closed tank with decompression method, oxygen is reduced with atmospheric density and reduce, until the various criterion requirement that reaches the required low oxygen concentration of various storage things.Fruits and vegetables, flowers, the required oxygen content of plant fresh-retaining preserving are in the critical point of aerobic and anaerobic respiration, general oxygenous O
2Concentration is 2～5%.
2. reduce basin air pressure with decompression method, the boiling point of water is dropped to below 0 ℃ or lower, cold to realize giving of storage thing in the basin.When the basin internal pressure is reduced to below the 3mmHg post, this moment, the boiling point of corresponding water be-5 ℃, and storage thing entity temperature is higher, and mostly more than 15 ℃, the huge temperature difference causes that strong evaporation absorbs heat, thus finish give fast cold.
3. utilize the liquid of water, solid, gas three phase point characteristic with decompression method, the basin internal pressure reduced to make in the storage gas phase zone of thing below solidification point, continue to be depressurized to the 0.285mmHg post again, thing to be store freeze low temperature (28 ℃～33 ℃) stable after, very fast again the basin internal gas pressure is back to atmospheric pressure, the storage thing will become solid phase area by gas phase zone 2～5 seconds (or shorter time) to be freezed, and promptly finishes quick-frozen.
The operating process that the present invention is used for fruits and vegetables, flowers, plant fresh-retaining preserving is: the field gather → store preceding classification → cleaning arrangement → machinery go into storage → decompression give cold → transfer oxygen temperature control humidification → confession ozone anticorrosion → long-period freshness preserving preserves.Adopt pure hypoxemia, its oxygen O
2Concentration is 2～15%, 0 ℃～15 ℃ of temperature; Saturated highly humid air, its humidity RH is 45～98%; Poisonous ozone of noresidue and anion, its ozone O
3Concentration is 5～10PPM, and negative ion concentration is 10
4Individual/cm
3More than.
The operating process of various storage thing quick freezing and cold preservings is: classification → finishing and packing before the storage → machinery is gone into storage → vacuum quick-frozen → hypothermia and hypoxia super-long-term refrigeration.Its vacuum is below the 0.285mmHg post, and temperature is-28 ℃～-33 ℃, and oxygen content is bordering on zero.
The present invention compared with prior art its advantage is: cold, fast prompt drop oxygen, vacuum quick-frozen, auto-control, low consumption operation, fresh-keeping, the hypothermia and hypoxia refrigeration of high-temperature storage are given in decompression, and each operating mode can be replaced multifunctional fresh-keeping and refrigeration rapidly.Adopt pure hypoxemia, the ambiance of the poisonous ozone of noresidue, saturated highly humid air realizes that fruits and vegetables, flowers, plant stride season high temperature (0 ℃～15 ℃) fresh-retaining preserving; Adopt vacuum quick-frozen, low temperature (28 ℃～-33 ℃), hypoxemia to realize the refrigeration of storage thing super-long-term.Storage thing unharmful substance delay, best in quality, it is also long to sell shelf life after the outbound.The invention solves and should fall oxygen, ventilate again, should high humidity, be afraid of the contradiction of rotting again; Solved that fruits and vegetables are seasonal to be produced and market supply all the year round, regional produce and the whole nation still to the contradiction of global consumption.The present invention is suitable for being constructed to industrialization pressure-reducing fresh-keeping storage facilities extensive, auto-control also can build up movably container-type fresh-keeping and cold storage device, so that long-distance car, Ship Transportation.
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 is a system and its apparatus schematic diagram of the present invention;
Fig. 2 is a basin generalized section of the present invention;
Fig. 3 is Fig. 2 A-A cutaway view;
Fig. 4 is Fig. 2 B-B cutaway view.
As shown in Figure 1, pressure-reducing fresh-keeping storage system of the present invention comprises refrigeration, decompression, storage storehouse With regulation and control four most of compositions.
Refrigerating part is that cold-producing medium enters low pressure recycle liquid receiver 25 under choke valve 23 controls, again Send into liquid phase with liquid pump 26 and regulate station 22. Enter basin 15 according to regulation and control instruction by control valve 17 One end of interior S shape pipeline 4,5,6 is in basin shell 1 (being equivalent to " cold drawing ") and basin The refrigeration piping heat absorption is evaporated and the gas of generation, flows out basins with refrigerating fluid by upper header 9 15, enter gas phase through constant voltage main valve 16 and regulate station 20, with and return low pressure recycle liquid receiver 25 and advance The promoting the circulation of qi liquid phase separation. Liquid falls into liquid receiver 25 bottoms according to gravity, and gas is by compressor 24 sucking-offs, The boil down to high pressure draught enters condenser 29, and being condensed into highly pressurised liquid, to enter high pressure liquid receiver 31 temporary Row is stored. Change and low pressure recycle liquid receiver 25 liquid levels height according to system condition, by control valve 27 regulation and control are by choke valve 23 circulating feeding liquids.
Cold-trap accessory system cooling is: refrigerating fluid by liquid phase regulate station 22 through valve 32 to the condensation cold-trap 37 and humidification cold-trap 38 feed flows, the gas that produces through two cold-traps heat absorption evaporation is with refrigerating fluid one Rise and to return gas phase through constant pressure valve 18 and regulate station 20, with and enter low pressure recycle liquid receiver 25 liquid phases Separate.
The decompression part is by vavuum pump 39,40, cold- trap 37,38, ozone generator 10, gas Valve 33,36,41～43, vacuum meter 34,35 and closed tank 15 form. When system gives cold Or during quick-frozen, start earlier fore pump 40, and open valve 33,41,42, the gas of extraction is through cold-trap 37 Discharged by valve 41,42 after the condensation. Observing basin 15 internal pressures by vacuum meter 34,35 reaches Behind the 10mmHg post, restart vavuum pump 39, shut off valve 41, two pumps moves simultaneously, continues to bleed Step-down, when pressure reached the 3mmHg post, corresponding temperature was-5 ℃, namely finish give cold. Continue again Pumped down to pressure reaches the 0.285mmHg post, and corresponding temperature is-30 ℃, is freezing of material storage The gas phase zone of correspondence under the junction temperature. Because the low pressure effect is not though material storage is frozen under solidification point Knot. Close extraction valve 33 this moment, and full admission valve 36,43 makes basin 15 internal pressures 2～5 When returning atmospheric pressure (being 760mmHg) in second, the material storage in the basin is also when corresponding a few second Between in, be transitioned into rapidly solid phase area from gas phase zone, thereby finish the quick-frozen of material storage.
For the water in the gas that prevents basin 15 interior extractions enters vavuum pump, just be provided with a band refrigeration The condensation cold-trap 37 of evaporimeter is removed the water in the gas bleeding in this condensation.
For getting rid of pernicious gas and the additional fresh air of basin 15 interior generations, just be provided with one and fill The certain liquid height does not freeze the humidification cold-trap 38 of water and refrigerating evaporator, and fresh air is by intake valve 43 by behind cold-trap 38 humidifications, provides highly humid air through valve 36 to basin 15, simultaneously by extraction valve 33 extract harmful exhaust out, after cold-trap 37 condensations are dried, by valve 41, vavuum pump 40 and valve 42 rows Go out, to reach the dynamic equilibrium of the required low oxygen concentration of fresh-retaining preserving in the basin, to guarantee material storage not Dewater, do not wilt.
For preventing that basin 15 interior material storages from rotting, can regularly connect the working power of ozone generator 10, close extraction valve 33, the ozone O of generation3Enter in the basin 15 with anion. Storage this moment In the tank in the material storage external pressure consistent, corner pressure is all consistent arbitrarily in the tank, when ozone and anion advance Enter, external pressure strengthens, and ozone can in basin on the optional position, carry out pressure permeation to the place material storage Formula sterilization from outward appearance to inner essence is anticorrosion. Because this mode is finished thoroughly, the time is very short. The concrete time Length needs kind and the character according to material storage, and under the condition with high humidity, various Sapromyceses are not given birth to Long being advisable.
The storage storehouse is the cylindrical container 15 that a steel shell 1, two ends are conical end socket 12, The horizontal two row's S shapes pipes 4,5,6 in parallel of tank inner cylinder part, along the tank length direction be provided with several etc. Vertical isometrical endless tube 2, standpipe 7, the string pipe 8 of arranging of spacing is near establishing position, interior tank skin top and the bottom Two upper header 9 and lower collector pipe 3 that run through the basin total length are arranged, and two terminal circle conical head 12 inwalls are established Convergent footpath endless tube 11 is arranged, and the entrance point 44 of S shape pipe in parallel joins with control valve 17 pipelines and is communicated with, and goes out Mouthful end 45 joins with lower collector pipe 3 entrance points and to be communicated with. Lower collector pipe 3 outlets and isometrical endless tube 2, standpipe 7, string pipe 8, gradually the import of reducing pipe 11 and upper header 9 is communicated with upper header 9 imports and constant voltage master The connection of joining of valve 16 pipelines. So the flow direction of refrigerating fluid in basin 15 is: entered by control valve 17 S shape pipe entrance point 44 flows to the port of export 45 and enters lower collector pipe 3. Flowed simultaneously by lower collector pipe 3 then To isometrical endless tube 2, standpipe 7, string pipe 8 and convergent footpath endless tube 11, compile again and flow to upper header 9, Through heat absorption evaporation and the gas that produces with refrigerating fluid, at last by the outlet of upper header 9 through perseverance Press main valve 16 to flow to low pressure recycle liquid receiver 25 and carry out the liquid phase separation. The stream of above-mentioned cold-producing medium To being " bottom in and top out ", also can be " upper entering and lower leaving ", or modes such as " left side are entered the right side and gone out ".
15 liang of tops of basin (or other positions) are provided with movable sealing door 13, on door (or other The position) observation window 14 is housed, changes with the situation of at any time observing in the basin.
The telemetering type Pressure gauge 19,21,28 of regulation and control parts, 30 and vacuum meter 34,35 with each The pressure variation of test point converts analog signal to, passes to the regulation and control centring system by signals collecting Do logic analysis, thereby control is adjusted automatically, in time sends instruction to each system and makes optimum operation.
Utilizing above-mentioned pressure-reducing fresh-keeping storage system is to adopt pure hypoxemia, its oxygen O to the fresh-retaining preserving of fruits and vegetables, flowers, plant2Concentration 2～5%, 0 ℃～15 ℃ of temperature; The poisonous ozone of noresidue and Anion, its ozone O3Concentration 5～10PPM, negative ion concentration 104Individual/cm3More than; Saturated height Humid air, its humidity RH45～98%. With closed tank to various material storage vacuum quick freezing and cold preservings Internal pressure is down to below the 0.285mmHg post, treats that the material storage temperature reaches-28 ℃～-33 ℃ shapes fully During attitude, rapidly sump pressure is returned again atmospheric pressure (being 760mmHg), material storage in 2～5 seconds Be transitioned into solid phase area by gas phase zone, namely finish quick-frozen.
Embodiment 1:
Gather 10 tons in the green ripe stage tomato (tomato) of field planting, the fresh-retaining preserving technical conditions are: basin internal pressure 76mmHg post, oxygen O
2Content 2.1%, carbon dioxide CO
2Content 0.003%, temperature 13.5, humidity RH98.5%.The duration of storage jede Woche feeds ozone once in jar, and each 2～5 minutes, ozone O
3Activity 5PPM, negative ion amount 10
4Individual/cm
3Storage period is 135 days, and weight-loss ratio 1% is looked its outward appearance when going out jar: lustrous surface, and the epidermis tensioner, green ripe color when still being into storage does not have the red phenomenon of commentaries on classics.Go out jar back depressing and all changeed red in 18 days at 18 ℃ of temperature, normal atmosphere.Mouthfeel: Sha Tian, no tart flavour.
Embodiment 2:
Gather field planting, 10 tons of sixty percent ripe first greens pepper (pimento), the quick freezing and cold preserving technical conditions are: storage thing temperature is 25 ℃ before the quick-frozen, 2～3 seconds quick-frozen time, storage thing temperature-28 ℃ after the quick-frozen, oxygen O
2Content 1%, humidity RH90%.360 days refrigeration phases, weight-loss ratio 1% goes out jar its outward appearance of room temperature reduction backsight: do not have wither soft, no firmness change, first change color.Mouthfeel: salubrious, tender and crisp, free from extraneous odour.
Embodiment 3:
Claims (6)
1, a kind of pressure-reducing fresh-keeping storage system, it comprises refrigeration, decompression, storage storehouse and regulates and control four major parts, it is characterized in that:
(1) refrigerating part is that cold-producing medium enters low pressure recycle liquid receiver 25 under choke valve 23 controls, send into liquid phase with liquid pump 26 again and regulate station 22, enter S shape pipeline 4 in the basin 15 according to regulation and control instruction by control valve 17,5, an end of 6, the refrigeration piping heat absorption is evaporated and the gas of generation in basin shell 1 and basin, flow out basin 15 with refrigerating fluid by upper header 9, enter gas phase through constant voltage main valve 16 and regulate station 20, with and return low pressure recycle liquid receiver 25 and carry out gas-liquid and be separated, liquid falls into liquid receiver 25 bottoms, gas is by compressor 24 sucking-offs, the boil down to high pressure draught enters condenser 29 and is condensed into highly pressurised liquid, entering high pressure liquid receiver 31 temporarily stores, change and low pressure recycle liquid receiver 25 liquid levels height according to system condition, by control valve 27 regulation and control, by choke valve 23 circulation feed flows; Cold-trap accessory system cooling procedure is: refrigerating fluid by liquid phase regulate station 22 through valve 32 to condensation cold-trap 37 and humidification cold-trap 38 feed flows, the gas that produces through the heat absorption evaporation, regulate station 20 with refrigerating fluid through constant voltage main valve 16 backspace gas phases, with and enter low pressure recycle liquid receiver 25 gas-liquids and be separated;
(2) decompression part is made up of vavuum pump 39,40, cold-trap 37,38, ozone generator 10, air valve 33,36,41～43, vacuum meter 34,35 and closed tank 15, when system gives cold or during quick-frozen, start fore pump 40 earlier, open valve 33,41,42, the gas of extracting out is discharged by valve 41,42 after cold-trap 37 condensations, observe after basins 15 internal pressures reach the 10mmHg post by vacuum meter 34,35, restart vavuum pump 39, shut off valve 41, two pumps moves simultaneously, continue pumped down, when pressure reached the 3mmHg post, corresponding temperature was-5 ℃; Continue pumped down to pressure again and reach the 0.285mmHg post, corresponding temperature is-30 ℃, this moment shut off valve 33, clear way valve 36,43, basin 15 internal pressures were returned atmospheric pressure (being 760mmHg) in 2～5 seconds; When system's fresh-retaining preserving, thing to be store give cold after, open fore pump 40, open valve 33,41,42, pumped down is to the various criterion requirement of the required low oxygen concentration of basin 15 various storage things; During for the humidification waste discharge, regularly open valve 36,43, by humidification cold-trap 38, in valve 36 enters basin 15, and the pernicious gas of storage deposits yields is through valve 33 in the basin by valve 43 for fresh air, and condensation cold-trap 37 is discharged by valve 41, pump 40, valve 42 at last; During for sterilization and anticorrosion, connect ozone generator 10 working powers, shut off valve 33, the ozone O of generation
3With anion with and enter in the basin 15 spaces arbitrarily, and from outward appearance to inner essence infiltration type is pressed into storage thing inside;
(3) the storage storehouse is a steel shell 1, two ends are the cylindrical container 15 of conical end socket 12, at the horizontal two row S shape pipes 4 of jar inner cylinder part, 5,6, be provided with several equidistantly perpendicular isometrical endless tubes of putting 2 along jar length direction, standpipe 7, string pipe 8, be provided with two upper header 9 and lower collector pipe 3 that run through jar total length in the position up and down near interior tank skin, two terminal circle conical head inwall is provided with convergent endless tube 11, the entrance point 44 of S shape pipe in parallel joins with control valve 17 pipelines and is communicated with, the port of export 45 joins with lower collector pipe 3 entrance points and is communicated with, lower collector pipe 3 outlets and isometrical endless tube 2, standpipe 7, string pipe 8, convergent footpath endless tube 11 and upper header 9 imports are communicated with, and the outlet of upper header 9 is joined with constant voltage main valve 16 pipelines and is communicated with; 15 liang of tops of basin are provided with movable sealing door 13.
2, pressure-reducing fresh-keeping according to claim 1 system, it is characterized in that: the flow direction of cold-producing medium in basin 15 is: flowed into by the liquid of the valve 17 output end from S shape pipe 4,5,6 in parallel, enter lower collector pipe 3 from other end outflow, by lower collector pipe 3 dispersion trains to endless tube 2,11, standpipe 7, string pipe 8, come together in upper header 9 at last and flow out, return liquid phase through constant voltage main valve 17 and regulate station 22.
3, pressure-reducing fresh-keeping storage system according to claim 1 is characterized in that: basin 15 is cylindrical shape, also can be cuboid or multiple edge body shape; The two ends end socket can be taper, butterfly, ellipse, plate shaped, and end socket is installed and be can be convex or spill.
4, utilize arbitrary claim in the claim 1～3 fast pressure-reducing fresh-keeping storage system, the method of preservation and freshness fruits and vegetables, flowers, plant, it is characterized in that: reduce the density of air in the closed tank with decompression method, oxygen concentration is reduced with atmospheric density and reduce.
5, a kind of pressure-reducing fresh-keeping storage system that utilizes according to claim 4, the method for preservation and freshness fruits and vegetables, flowers, plant is characterized in that: various storage thing requisite oxygen O
2Concentration 2～5%, 0 ℃～15 ℃ of temperature; With ozone generator generation ozone and anion, in the input closed tank, its ozone O
3Concentration 5～10ppm, negative ion concentration 10
4Individual/cm
3More than; By clammy trap saturated highly humid air of input in storage, its humidity RH45～98%.
6, utilize the described subatmospheric pressure storage of arbitrary claim system in the claim 1～3, the method of preservation and freshness fruits and vegetables, flowers, plant, it is characterized in that: with the decompression of bleeding the basin internal pressure is reduced to below the 0.285mmHg post, its refrigerated storage temperature-28 ℃～-33 ℃, oxygen concentration are bordering on zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105879A CN1049092C (en) | 1995-06-08 | 1995-06-08 | Pressure-reducing fresh-keeping storage system and its device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105879A CN1049092C (en) | 1995-06-08 | 1995-06-08 | Pressure-reducing fresh-keeping storage system and its device |
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| Publication Number | Publication Date |
|---|---|
| CN1137349A CN1137349A (en) | 1996-12-11 |
| CN1049092C true CN1049092C (en) | 2000-02-09 |
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| CN95105879A Expired - Fee Related CN1049092C (en) | 1995-06-08 | 1995-06-08 | Pressure-reducing fresh-keeping storage system and its device |
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| DE202004021139U1 (en) | 2004-01-28 | 2007-02-01 | Apio, Inc., Guadalupe | packaging |
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| CN86101706B (en) * | 1986-03-10 | 1987-10-14 | 华中工学院 | Method and equipment for intensifying freshness of fruits and vegetables with ozone ion |
| US4735134A (en) * | 1985-10-10 | 1988-04-05 | Shur-Stor Systems Inc. | Apparatus for storing produce |
-
1995
- 1995-06-08 CN CN95105879A patent/CN1049092C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3913661A (en) * | 1972-01-05 | 1975-10-21 | Grumman Allied Industries | Low pressure storage of metabolically active material with open cycle refrigeration |
| CN85200033U (en) * | 1985-04-01 | 1985-10-10 | 清华大学 | Automatic control storehouse with spontaneous gas-regulated system |
| US4735134A (en) * | 1985-10-10 | 1988-04-05 | Shur-Stor Systems Inc. | Apparatus for storing produce |
| CN86101706B (en) * | 1986-03-10 | 1987-10-14 | 华中工学院 | Method and equipment for intensifying freshness of fruits and vegetables with ozone ion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2808494C1 (en) * | 2023-06-05 | 2023-11-28 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Саратовский государственный университет генетики, биотехнологии и инженерии имени Н.И.Вавилова" | Method for ensuring preservation of fruits and vegetables |
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| Publication number | Publication date |
|---|---|
| CN1137349A (en) | 1996-12-11 |
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