CN104886234B - A kind of fruits and vegetables Liquid nitrogen precooler device - Google Patents
A kind of fruits and vegetables Liquid nitrogen precooler device Download PDFInfo
- Publication number
- CN104886234B CN104886234B CN201510370059.4A CN201510370059A CN104886234B CN 104886234 B CN104886234 B CN 104886234B CN 201510370059 A CN201510370059 A CN 201510370059A CN 104886234 B CN104886234 B CN 104886234B
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- nitrogen
- liquid nitrogen
- jet pump
- fore
- cooling room
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 374
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 187
- 239000007788 liquid Substances 0.000 title claims abstract description 93
- 235000012055 fruits and vegetables Nutrition 0.000 title claims abstract description 54
- 238000001816 cooling Methods 0.000 claims abstract description 43
- 238000009423 ventilation Methods 0.000 claims abstract description 25
- 230000008602 contraction Effects 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- 238000007914 intraventricular administration Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 235000013311 vegetables Nutrition 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims 1
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000008676 import Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000037323 metabolic rate Effects 0.000 description 1
- 235000006286 nutrient intake Nutrition 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000007180 physiological regulation Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 230000009758 senescence Effects 0.000 description 1
Landscapes
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Storage Of Fruits Or Vegetables (AREA)
Abstract
The present invention provides a kind of fruits and vegetables Liquid nitrogen precooler device, including auto-pressurizing liquid nitrogen bottle, liquid nitrogen pipe, nitrogen tube, nitrogen jet pump and fore-cooling room, auto-pressurizing liquid nitrogen bottle goes out nitrogen mouth and is connected to nitrogen jet pump left end high pressure admission mouth with nitrogen tube, auto-pressurizing liquid nitrogen bottle goes out the liquid nitrogen import that liquid nitrogen mouth is connected to nitrogen jet pump upper end with liquid nitrogen pipe, the outlet of nitrogen jet pump right-hand member is connected with fore-cooling room with ventilation duct one, and fore-cooling room's ventilation duct two is connected to the air entry of nitrogen jet pump lower end.Beneficial effects of the present invention：First, precooling, the fruits and vegetables producing region remote especially suitable for region can be carried out to fruits and vegetables in the case of unregulated power；Second, nitrogen circulation uses, the utilization rate of liquid nitrogen is improved.
Description
Technical field
The present invention relates to it is a kind of suitable for region is remote and the fruit and vegetable picking in the fruits and vegetables place of production of unregulated power after precooling fruits and vegetables
Liquid nitrogen precooler device.
Background technology
Precooling is to rapidly remove field heat before transport, storage, processing to the fruits and vegetables of freshly harvested, is cooled to predetermined temperature
Process, be that fruits and vegetables are circulated, stored, processing important treatment technology early stage；Vegetable article is plucked from natural growing environment
It is still fresh and alive entity after getting off, it grows cell and still breathed；Body temperature when fruits and vegetables harvest is warm close to ambient air temperature
Degree can reach more than 30 DEG C；Under such high temperatures, the fruits and vegetables breathing of freshly harvested is very vigorous, and ripening and senescence pace of change is very
It hurry up, easily rot；Effectively to suppress the metabolism of postharvest fruit and vegetable, postharvest fruit and vegetable need to carry out precooling treatment；Precooling can drop
Low postharvest fruit and vegetable respiratory intensity, the release of inhibitory enzyme and ethene；Fruit and vegetable physiological regulation metabolic rate is reduced, reduces physiological disease.
Research shows that precooling can not only reduce infecting for storage period moisture loss, nutrient consumption and pathogen, keep its compared with
The index of quality such as excellent hardness, brittleness, elasticity and freshness, while the energy resource consumption of refrigeration machinery can be also reduced, to adopting
With the fruits and vegetables of plastic film bag sealing controlled atmosphere cold storage, it is also prevented from causing the condensation in bag.
Research shows, in whole cold chain, not pre-cooled fruits and vegetables loss late in circulation is up to 20%-30%, and passes through
The fruits and vegetables loss late only 5%-10% of precooling；But in China's pre-cooling, the condition of particularly place of production precooling is very backward, because have
Place can not provide power supply or electric power deficiency.Some fruit-vegetable qualities are fine, but because region limit with it is backward in technique, cause to produce
Go out and had a greatly reduced quality with benefit.
The content of the invention
The present invention is directed to problem above, there is provided a kind of and fruit and vegetable picking in the fruits and vegetables place of production of unregulated power remote suitable for region
The fruits and vegetables Liquid nitrogen precooler device of precooling afterwards.
A kind of fruits and vegetables Liquid nitrogen precooler device, including auto-pressurizing liquid nitrogen bottle, liquid nitrogen pipe, nitrogen tube, ventilation duct one, ventilation duct
2nd, nitrogen jet pump and fore-cooling room, auto-pressurizing liquid nitrogen bottle nitrogen outlet are connected to nitrogen jet pump left end high pressure with nitrogen tube
Air inlet, auto-pressurizing liquid nitrogen bottle liquid nitrogen outlet are connected to the liquid nitrogen import of nitrogen jet pump upper end, nitrogen jet with liquid nitrogen pipe
The outlet of pump right-hand member is connected with fore-cooling room with ventilation duct one, and fore-cooling room's ventilation duct two is connected to the air-breathing of nitrogen jet pump lower end
Mouthful.
Further, nitrogen jet pump includes Laval-cavity nozzle, mixing chamber, contraction section, interlude and diffuser, nitrogen spray
Penetrate at pump high pressure admission mouth and accompany Laval-cavity nozzle, nitrogen jet pump left end sets mixing chamber, and Laval-cavity nozzle is wrapped in mixing chamber
Left end, and Laval-cavity nozzle gas outlet is in mixing chamber, mixing chamber right-hand member connection contraction section, contraction section connection interlude, in
Between section connection diffuser, the diffuser is horn-like.
Further, the diffuser of nitrogen jet pump right-hand member connects the upper end open of fore-cooling room's left side wall with ventilation duct one,
Ventilation duct one is provided with air-valve.
Further, auto-pressurizing liquid nitrogen bottle nitrogen outlet nitrogen tube connects the mixed of nitrogen jet pump with Laval-cavity nozzle
Room is closed, and the both ends of nitrogen tube are provided with nitrogen valve, auto-pressurizing liquid nitrogen bottle liquid nitrogen outlet connects nitrogen jet pump with liquid nitrogen pipe
Mixing chamber, and liquid nitrogen pipe connection auto-pressurizing liquid nitrogen bottle end is provided with liquid nitrogen valve, and liquid nitrogen pipe connects mixing chamber end and is provided with nitrogen liquid
Temperature-sensing valve.
Further, the lower ending opening ventilation duct two of fore-cooling room's left side wall is connected to the mixing chamber lower end of nitrogen jet pump
Air entry, ventilation duct two is provided with air-valve.
Further, in fore-cooling room's wall be heat insulation wall, and wall be provided with the thermometer of monitoring precooling indoor temperature with
Monitor the strong pressure gauge of precooling intraventricular pressure.
Further, fore-cooling room is provided with relief valve.
Further, some fruits and vegetables framves are provided with fore-cooling room, if fruits and vegetables frame has a dried layer, every layer of laying ice bag layer, on ice bag
Re-lay spongy layer.
Further, cavity wall is uniformly distributed on ice bag layer, forms cavity with ice bag layer, then lay spongy layer thereon again.
Further, Laval-cavity nozzle mixing chamber left end length be mixer length 1/3rd, contraction section, in
Between section and diffuser three length and be mixer length, the length ratio of contraction section, interlude and diffuser three is 1.5:
2:3.5。
The beneficial effects of the present invention are：First, precooling can be carried out to fruits and vegetables, especially suitable for area in the case of unregulated power
The remote fruits and vegetables producing region in domain；Second, nitrogen circulation uses, the utilization rate of liquid nitrogen is improved.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of fruits and vegetables Liquid nitrogen precooler device.
Accompanying drawing 2 is the structural representation of nitrogen jet pump.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described：
Embodiment 1, with reference to accompanying drawing 1-2,
A kind of fruits and vegetables Liquid nitrogen precooler device, including auto-pressurizing liquid nitrogen bottle 1 are liquid nitrogen pipe 3, nitrogen tube 5, ventilation duct 1, logical
Airduct 2 16, nitrogen jet pump 2 and fore-cooling room 10, the nitrogen outlet nitrogen tube 5 of auto-pressurizing liquid nitrogen bottle 1 are connected to nitrogen jet
The left end high pressure admission mouth of pump 2, the liquid nitrogen outlet liquid nitrogen pipe 3 of auto-pressurizing liquid nitrogen bottle 1 are connected to the liquid nitrogen of the upper end of nitrogen jet pump 2
Import, the outlet of the right-hand member of nitrogen jet pump 2 are connected with fore-cooling room 10 with ventilation duct 1, and fore-cooling room 10 is connected to ventilation duct 2 16
The air entry of the lower end of nitrogen jet pump 2.
A kind of fruits and vegetables Liquid nitrogen precooler device, nitrogen jet pump 2 include Laval-cavity nozzle 12, mixing chamber 13, contraction section 14, in
Between section 17 and diffuser 15, accompany Laval-cavity nozzle 12 at the high pressure admission mouth of nitrogen jet pump 2, the left end of nitrogen jet pump 2 sets mixed
Room 13 is closed, Laval-cavity nozzle 12 is wrapped in the left end of mixing chamber 13, and the gas outlet of Laval-cavity nozzle 12 mixes in mixing chamber 13
The right-hand member connection contraction section 14 of room 13, contraction section 14 connect interlude 17, and interlude 17 connects diffuser 15, and the diffuser 15 is
It is horn-like.
A kind of fruits and vegetables Liquid nitrogen precooler device, the diffuser 15 of the right-hand member of nitrogen jet pump 2 connect fore-cooling room 10 with ventilation duct 1
The upper end open of left side wall, ventilation duct 1 are provided with air-valve 7.
A kind of fruits and vegetables Liquid nitrogen precooler device, the nitrogen outlet nitrogen tube 5 of auto-pressurizing liquid nitrogen bottle 1 and Laval-cavity nozzle 12 connect
The left end of mixing chamber 13 of logical nitrogen jet pump 2, and the both ends of nitrogen tube 5 are provided with nitrogen valve 14, the liquid nitrogen of auto-pressurizing liquid nitrogen bottle 1
Outlet connects the upper end of mixing chamber 13 of nitrogen jet pump 2 with liquid nitrogen pipe 3, and liquid nitrogen pipe 3 connects auto-pressurizing liquid nitrogen bottle end and is provided with
Liquid nitrogen valve 9, liquid nitrogen pipe 3 connect mixing chamber end and are provided with nitrogen liquid temperature-sensing valve 6.
A kind of fruits and vegetables Liquid nitrogen precooler device, the lower ending opening ventilation duct 2 16 of the left side wall of fore-cooling room 10 are connected to nitrogen spray
The air entry of the lower end of mixing chamber 13 of pump 2 is penetrated, ventilation duct 2 16 is provided with air-valve 7.
A kind of fruits and vegetables Liquid nitrogen precooler device, the interior wall of fore-cooling room 10 is heat insulation wall, and wall is provided with monitoring fore-cooling room
The thermometer of the temperature pressure gauge strong with monitoring precooling intraventricular pressure.
A kind of fruits and vegetables Liquid nitrogen precooler device, fore-cooling room 10 are provided with relief valve 11.
A kind of fruits and vegetables Liquid nitrogen precooler device, fore-cooling room 10 is interior to be provided with some fruits and vegetables framves, if fruits and vegetables frame has dried layer, every layer of laying
Ice bag layer, spongy layer is re-layed on ice bag.
A kind of fruits and vegetables Liquid nitrogen precooler device, cavity wall is uniformly distributed on ice bag layer, form cavity with ice bag layer, then again thereon
Lay spongy layer.
A kind of fruits and vegetables Liquid nitrogen precooler device, Laval-cavity nozzle 12 are the three of mixer length in the left end length of mixing chamber 13
/ mono-, contraction section 14, interlude 17 and the three of diffuser 15 length and be mixer length, contraction section 14, interlude 17
Length ratio with the three of diffuser 15 is 1.5:2:3.5.
A kind of fruits and vegetables Liquid nitrogen precooler device, using liquid nitrogen as low-temperature receiver, liquid nitrogen of the nitrogen jet pump 2 as nitrogen circulation power
Pre-cooler.
A kind of fruits and vegetables Liquid nitrogen precooler device, high pressure low temperature nitrogen are entered in mixing chamber by the nozzle handle of nitrogen jet pump 2
High-pressure liquid nitrogen be converted into high velocity air, gas pressure energy is changed into kinetic energy, and produce in the mixing chamber of nitrogen jet pump 2 true
Sky, the high-temperature pressure nitrogen returned using vacuum drawn by fore-cooling room, high-temperature pressure nitrogen and the low temperature come out from liquid nitrogen bottle are high
Nitrogen and low temperature liquid nitrogen mixing are pressed, nitrogen is finally mixed and is pressurized by the diffuser 14 of nitrogen jet pump 2, gas kinetic energy is converted into
Pressure energy, discharge nitrogen jet pump 2, the cooling of supply fore-cooling room 10 are used, and fore-cooling room 10 only has two to export, other positions sealing,
And lower port causes gas from top to bottom by fore-cooling room, in fore-cooling room 10 because gas discharge causes air pressure to be less than upper port
The abundant precooling of fruits and vegetables.
A kind of fruits and vegetables Liquid nitrogen precooler device, the pre-cooled room 10 unnecessary nitrogen that heats up are discharged by the relief valve 11 of fore-cooling room 10
Go out.
A kind of fruits and vegetables Liquid nitrogen precooler device, the air entry of the lower end of nitrogen jet pump 2 for mixer length two/
One.
A kind of fruits and vegetables Liquid nitrogen precooler device, the cavity size that the cavity wall is formed with ice bag layer differ.
A kind of fruits and vegetables Liquid nitrogen precooler device, bases oneself upon isolated area, passes through auto-pressurizing liquid nitrogen bottle in the case of unregulated power
Pressure as power, precooling persistently and timely can be carried out to fruits and vegetables, reach at source with regard to precooling, improve fruit-vegetable quality, be
Increasing peasant income and growth of agricultural efficiency provide technical support, and also entering international market for China's Agricultural improves competitiveness.
Fruits and vegetables are aerated precooling or differential pressure precooling by a kind of fruits and vegetables Liquid nitrogen precooler device.
Although the present invention is described by reference to preferred embodiment, those of ordinary skill in the art should
Work as understanding, the description of above-described embodiment can be not limited to, in the range of claims, can make each in form and details
Kind change.
Claims (1)
1. a kind of fruits and vegetables Liquid nitrogen precooler device, including auto-pressurizing liquid nitrogen bottle, liquid nitrogen pipe, nitrogen tube, ventilation duct one, ventilation duct
2nd, nitrogen jet pump and fore-cooling room, it is characterised in that：Auto-pressurizing liquid nitrogen bottle nitrogen outlet is connected to nitrogen jet with nitrogen tube
Pump left end high pressure admission mouth, the liquid nitrogen that auto-pressurizing liquid nitrogen bottle liquid nitrogen outlet is connected to nitrogen jet pump upper end with liquid nitrogen pipe enter
Mouthful, the outlet of nitrogen jet pump right-hand member is connected with fore-cooling room with ventilation duct one, and fore-cooling room's ventilation duct two is connected to nitrogen jet pump
The air entry of lower end；Nitrogen jet pump includes Laval-cavity nozzle, mixing chamber, contraction section, interlude and diffuser, nitrogen jet pump
Laval-cavity nozzle is accompanied at high pressure admission mouth, nitrogen jet pump left end sets mixing chamber, and Laval-cavity nozzle is wrapped in a left side for mixing chamber
End, and Laval-cavity nozzle gas outlet, in mixing chamber, mixing chamber right-hand member connection contraction section, contraction section connects interlude, interlude
Diffuser is connected, the diffuser is horn-like；The diffuser of nitrogen jet pump right-hand member is connected on the left of fore-cooling room with ventilation duct one
The upper end open of wall, ventilation duct one are provided with air-valve；Auto-pressurizing liquid nitrogen bottle nitrogen outlet nitrogen tube and Laval-cavity nozzle connect
The mixing chamber of logical nitrogen jet pump, and the both ends of nitrogen tube are provided with nitrogen valve, auto-pressurizing liquid nitrogen bottle liquid nitrogen outlet liquid nitrogen
Pipe connects the mixing chamber of nitrogen jet pump, and liquid nitrogen pipe connection auto-pressurizing liquid nitrogen bottle end is provided with liquid nitrogen valve, liquid nitrogen pipe connection
Mixing chamber end is provided with nitrogen liquid temperature-sensing valve；The lower ending opening ventilation duct two of fore-cooling room's left side wall is connected to the mixing of nitrogen jet pump
The air entry of room lower end, ventilation duct two are provided with air-valve；It is heat insulation wall in fore-cooling room's wall, and wall is provided with monitoring fore-cooling room
The thermometer of the interior temperature pressure gauge strong with monitoring precooling intraventricular pressure；Fore-cooling room is provided with relief valve；If dry fruit is provided with fore-cooling room
Vegetable frame, if fruits and vegetables frame has dried layer, every layer is laid ice bag layer, and spongy layer is re-layed on ice bag；Cavity wall is uniformly distributed on ice bag layer, with
Ice bag layer forms cavity, then lays spongy layer thereon again；Laval-cavity nozzle is mixer length in the left end length of mixing chamber
1/3rd, contraction section, interlude and diffuser three length and be mixer length, contraction section, interlude and diffusion
Duan Sanzhe length ratio is 1.5:2:3.5；Using liquid nitrogen as low-temperature receiver, Liquid nitrogen precooler of the nitrogen jet pump as nitrogen circulation power
Device；The high-pressure liquid nitrogen entered in mixing chamber is converted into high velocity air by high pressure low temperature nitrogen by the nozzle of nitrogen jet pump,
Gas pressure energy is changed into kinetic energy, and vacuum is produced in the mixing chamber of nitrogen jet pump, returned using vacuum drawn by fore-cooling room
The high-temperature pressure nitrogen come, high-temperature pressure nitrogen mix with the cryogenic high pressure nitrogen and low temperature liquid nitrogen that are come out from liquid nitrogen bottle, finally
Mix nitrogen to be pressurized by the diffuser of nitrogen jet pump, gas kinetic energy is converted into pressure energy, discharges nitrogen jet pump, supplies precooling
Room cooling is used, and fore-cooling room only has two outlets, other positions sealing, and lower port causes air pressure to be less than upper end because of gas discharge
Mouthful, cause gas from top to bottom by fore-cooling room, to the abundant precooling of fruits and vegetables in fore-cooling room, the unnecessary nitrogen of pre-cooled room heating
Emitted by the relief valve of fore-cooling room；The air entry of nitrogen jet pump lower end is the half of mixer length；Cavity wall with
The cavity size that ice bag layer is formed differs；Fruits and vegetables are aerated with precooling or differential pressure precooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370059.4A CN104886234B (en) | 2015-06-30 | 2015-06-30 | A kind of fruits and vegetables Liquid nitrogen precooler device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370059.4A CN104886234B (en) | 2015-06-30 | 2015-06-30 | A kind of fruits and vegetables Liquid nitrogen precooler device |
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| Publication Number | Publication Date |
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| CN104886234A CN104886234A (en) | 2015-09-09 |
| CN104886234B true CN104886234B (en) | 2018-03-27 |
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| CN201510370059.4A Expired - Fee Related CN104886234B (en) | 2015-06-30 | 2015-06-30 | A kind of fruits and vegetables Liquid nitrogen precooler device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345729A (en) * | 2017-07-21 | 2017-11-14 | 中国科学院理化技术研究所 | Cryogenic treatment device |
| CN109140859B (en) * | 2018-08-24 | 2023-10-27 | 深圳顺丰泰森控股(集团)有限公司 | Quick-freezing precooling device and quick-freezing precooling method |
| CN109566725B (en) * | 2018-12-18 | 2022-03-11 | 华南农业大学 | Spherical fruit and vegetable precooling and packaging gas prefilling all-in-one machine |
| CN111981748B (en) * | 2020-09-01 | 2022-02-15 | 广州极速制冷设备有限公司 | Liquid nitrogen instant freezer |
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|---|---|---|---|---|
| CN2150374Y (en) * | 1993-01-01 | 1993-12-22 | 余宗宁 | Vacuum jetting device |
| CN2599489Y (en) * | 2003-02-19 | 2004-01-14 | 魏长贵 | Food fresh-keeping refrigeration device using liquified nitrogen |
| CN2640340Y (en) * | 2003-08-05 | 2004-09-15 | 马延平 | Double-freezing food table |
| CN201476434U (en) * | 2009-08-13 | 2010-05-19 | 贵州英特利智能控制工程研究有限责任公司 | Liquid nitrogen refrigerating apparatus |
| CN101941561A (en) * | 2010-09-09 | 2011-01-12 | 华南农业大学 | Air conditioning system for fresh-keeping transportation of fruits and vegetables and implementation method thereof |
| JP5345211B2 (en) * | 2008-06-19 | 2013-11-20 | サド，ヤミル アディブ マシーズ | Ultra-high-speed food freezer by direct contact of dripped liquid nitrogen |
| CN204356361U (en) * | 2014-12-25 | 2015-05-27 | 台州德力通工量具制造有限公司 | Low-temperature treatment plant |
| CN204796640U (en) * | 2015-06-30 | 2015-11-25 | 温州科技职业学院 | Fruit vegetables liquid nitrogen precooling apparatus |
-
2015
- 2015-06-30 CN CN201510370059.4A patent/CN104886234B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2150374Y (en) * | 1993-01-01 | 1993-12-22 | 余宗宁 | Vacuum jetting device |
| CN2599489Y (en) * | 2003-02-19 | 2004-01-14 | 魏长贵 | Food fresh-keeping refrigeration device using liquified nitrogen |
| CN2640340Y (en) * | 2003-08-05 | 2004-09-15 | 马延平 | Double-freezing food table |
| JP5345211B2 (en) * | 2008-06-19 | 2013-11-20 | サド，ヤミル アディブ マシーズ | Ultra-high-speed food freezer by direct contact of dripped liquid nitrogen |
| CN201476434U (en) * | 2009-08-13 | 2010-05-19 | 贵州英特利智能控制工程研究有限责任公司 | Liquid nitrogen refrigerating apparatus |
| CN101941561A (en) * | 2010-09-09 | 2011-01-12 | 华南农业大学 | Air conditioning system for fresh-keeping transportation of fruits and vegetables and implementation method thereof |
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| CN204796640U (en) * | 2015-06-30 | 2015-11-25 | 温州科技职业学院 | Fruit vegetables liquid nitrogen precooling apparatus |
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| CN104886234A (en) | 2015-09-09 |
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Address after: 325006 Zhejiang, Ouhai, South East Road, No. 38, Wenzhou National University Science Park Incubator Patentee after: Wenzhou Vocational College of Science and Technology Address before: 325006 No. six Hongqiao Road, Wenzhou, Zhejiang, 1000 Patentee before: Wenzhou Vocational College of Science and Technology |
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Granted publication date: 20180327 Termination date: 20200630 |