CN105794953A - Differential pressure precooling system and method - Google Patents
Differential pressure precooling system and method Download PDFInfo
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- CN105794953A CN105794953A CN201410843456.4A CN201410843456A CN105794953A CN 105794953 A CN105794953 A CN 105794953A CN 201410843456 A CN201410843456 A CN 201410843456A CN 105794953 A CN105794953 A CN 105794953A
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- differential pressure
- temperature receiver
- low
- precooling system
- pressure precooling
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 239000000284 extract Substances 0.000 claims abstract description 5
- 235000013399 edible fruits Nutrition 0.000 claims description 17
- 235000012055 fruits and vegetables Nutrition 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 17
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Storage Of Fruits Or Vegetables (AREA)
- Storage Of Harvested Produce (AREA)
Abstract
The invention relates to the technical field of agricultural product storage, in particular to a differential pressure precooling system and method with ice as a cold source. The differential pressure precooling system comprises a negative pressure forming area, a cooling area and a cold source storage area; the negative pressure forming region includes: a fan and a plenum box; the fan extracts air in the static pressure box connected with the fan to form pressure difference, so that the cold source storage area cools the fruits and vegetables in the cooling area; one end of the cooling area is connected with the negative pressure forming area, and the other end of the cooling area is connected with the cold source storage area; and the negative pressure forming area, the cooling area and the cold source storage area form a nearly closed space. The differential pressure precooling system and the differential pressure precooling method provided by the invention can quickly cool fruits and vegetables, and simultaneously replenish water lost by agricultural products of fruits and vegetables in the cooling process, thereby improving the fresh-keeping rate of the agricultural products of fruits and vegetables.
Description
Technical field
The present invention relates to agricultural product storage technique field, particularly relate to a kind of differential pressure precooling system and method being low-temperature receiver with ice.
Background technology
Fruit and vegetable, owing to having higher breathing rate and evaporation rate, therefore very easily rots and is difficult to preserve.Agricultural product can accumulate substantial amounts of field heat and respiration heat after gathering, and more accelerates above physiological phenomenon and then accelerates the aging and deterioration of product.Precooling treatment is technology by product fast cooling at short notice, it is often necessary to reaching required low temperature in several minutes to day, precooling treatment actually comprises many fast cooling technology under not injuring product situation.Pre-cooling operation is mostly independently of an operation outside cold preservation, and the forecooling method adopted by reality at present can be divided into following several: frozen water pre-cooling, vacuum pre-cooling, differential pressure precooling and trash ice pre-cooling etc..
Differential pressure precooling is a kind of method of forced draft cooling, and the mode of its cooling is to force cold wind to enter in packing crates, makes cold air directly contact with product.Its principle is to utilize air exhauster to make packing crates both sides form pressure differential, and cold air is processed by opposite side air vent after being entered by packing crates side air vent and contacted with product, is taken away by the heat in case simultaneously.But traditional differential pressure precooling device cooling rate is relatively slow, and easily causes product dehydration, in use it is frequently necessary to additionally to arrange that humidification system is to keep certain relative humidity.
Summary of the invention
The technical problem to be solved in the present invention there is provided a kind of can the differential pressure precooling system and method for supplementary loss moisture in temperature-fall period.
In order to solve above-mentioned technical problem, the invention provides a kind of differential pressure precooling system.This differential pressure precooling system includes:
Negative pressure forms region, cooled region and low-temperature receiver memory area；
Described negative pressure forms region and includes: blower fan and plenum chamber；Described blower fan extracts air in coupled described plenum chamber and forms pressure reduction, makes described low-temperature receiver memory area that the fruit and vegerable in described cooled region to be cooled down；
Described cooled region one end forms region with described negative pressure and is connected, and the other end is connected with described low-temperature receiver memory area；And described negative pressure forms region, described cooled region and described low-temperature receiver memory area and forms nearly confined space.
Preferably, described low-temperature receiver memory area includes: side plate, low-temperature receiver discharger and cover plate；
Described side plate and described cover plate surround low-temperature receiver memory area, and described low-temperature receiver discharger connects described side plate, connects with described low-temperature receiver memory area；
It is equipped with multilayer insulating panel in described low-temperature receiver memory block, described dividing plate is placed with multiple ice hockey；The plurality of ice hockey provides low-temperature receiver for described differential pressure precooling system；
Described low-temperature receiver discharger is provided with through hole, and is connected with described cooled region.
Preferably, described cover plate is dismountable cover plate, in order to facilitate picking and placeing of described dividing plate.
Preferably, the cross section of described dividing plate is waveform, and each trough of waveform dividing plate is in order to accommodating ice hockey.
Preferably, the diameter of described ice hockey is more than the distance of adjacent two crests of described waveform dividing plate, and less than the distance between the described upper and lower two-layer of waveform dividing plate.
Preferably, described low-temperature receiver memory area also includes the fin being located on described side plate, in order to place multiple described dividing plate.
Preferably, described through hole is circular, and diameter is 80～100mm.
Preferably, described cooled region is the one in canvas or Polypropylence Sheet.
Present invention also offers a kind of differential pressure precooling method, adopt described differential pressure precooling system to carry out pre-cooling.
The technique scheme of the present invention has the advantage that differential pressure precooling system provided by the invention, utilizes the Ice Storage Tank being equipped with ice hockey to substitute refrigeration system.Blower fan directly opened by fruit and vegerable agricultural product after putting into system, make the fruit and vegetable basket both sides of accommodating fruit and vegerable agricultural product produce pressure reduction, enable a system to rapid cooling.Meanwhile, the moisture that after blower fan unlatching, ice cube evaporation produces directly contacts fruit and vegetable agricultural product together along with cold air, supplements the moisture that fruit and vegerable agricultural product run off, improve the fresh-keeping rate of fruit and vegerable agricultural product in temperature-fall period.
Accompanying drawing explanation
Fig. 1 is the differential pressure precooling system structure schematic diagram that the embodiment of the present invention provides；
Fig. 2 is the Ice Storage Tank structural representation in the differential pressure precooling system that the embodiment of the present invention provides；
Fig. 3 is the Ice Storage Tank front view in the differential pressure precooling system that the embodiment of the present invention provides；
Fig. 4 is the Ice Storage Tank sectional view in the differential pressure precooling system that the embodiment of the present invention provides.
In figure: 1: Ice Storage Tank；2: fruit and vegetable basket；3: canvas；4: plenum chamber；5: blower fan；6: casing；7: cover plate；8: exhaust outlet；9,10: side plate；11: baffle plate；12: waveform dividing plate；13: manhole.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
As it is shown in figure 1, the structural representation that the embodiment of the present invention provides.
This differential pressure precooling system includes negative pressure and forms region, cooled region and low-temperature receiver memory area；Negative pressure forms region and includes: blower fan 5 and plenum chamber 4；Blower fan 5 extracts air in coupled plenum chamber 4 and forms pressure reduction, makes low-temperature receiver memory area that the fruit and vegerable in cooled region to be cooled down；Cooled region one end forms region with negative pressure and is connected, and the other end is connected with low-temperature receiver memory area；And negative pressure forms region, cooled region and low-temperature receiver memory area and forms nearly confined space.
Wherein, the Ice Storage Tank to be placed with ice hockey of the low-temperature receiver memory area in the differential pressure precooling system that the embodiment of the present invention provides, but be not limited thereto.Generally, the differential pressure precooling system that the embodiment of the present invention provides is used for the fruit and vegerable being placed in the multiple fruit and vegetable baskets 2 under the cooled region in warehouse are cooled down, and adopting ice is that low-temperature receiver is advantageous in that rate of cooling can supplement, while fast, the moisture that fruit and vegerable run off.Further, fruit and vegerable not only can be cooled down by cooled region, to what need pre-cooling the moisture that can run off in precooling process, the chilldown system that the embodiment of the present invention provides can treat that pre-cooling thing all can play good precooling effect.Cooled region covers on outside multiple fruit and vegetable basket 2, concentrates and fruit and vegerable are cooled down, it is to avoid unnecessary waste.Cooled region in the present embodiment is for canvas 3, but cooled region can be the one in canvas or Polypropylence Sheet, and multiple fruit and vegetable basket 2 the superiors are covered upper canvas 3, and canvas 3 directly is connected effectively to reduce with Ice Storage Tank one end and laterally leaks out simultaneously.
Further, as in figure 2 it is shown, for the embodiment of the present invention provide differential pressure precooling system in Ice Storage Tank structural representation.Ice Storage Tank 1 includes: side plate 9,10, low-temperature receiver discharger exhaust outlet 8 and cover plate 7, and side plate 9,10 and cover plate 7 surround whole Ice Storage Tank 1, exhaust outlet 8 connecting lateral plate 9,10, connect with the interior zone of Ice Storage Tank 1 casing 6.Wherein, the exhaust outlet 8 being provided with through hole is positioned at the side of Ice Storage Tank 1 casing 6, and the side that exhaust outlet 8 is connected with canvas 3 is that as it is shown on figure 3, exhaust outlet 8 is in outer expanding shape, the purpose of design is in that to increase canvas 3 and the contact area of cold air in Ice Storage Tank 1 outer expanding shape.Dividing plate is used for housing multiple ice hockey, and is placed in Ice Storage Tank 1 casing 6, and plurality of ice hockey provides low-temperature receiver for differential pressure precooling system.Further, cover plate 7 is set to detachably, operates front opening cover plate 7 in pre-cooling and places required dividing plate and ice hockey, closes cover plate 7 when pre-cooling operates.
Further, multiple through holes that exhaust outlet 8 is arranged are manhole 13, are used for bringing cold air and the steam of ice hockey evaporation into multiple fruit and vegetable baskets 2 under canvas 3, and in the present embodiment, the diameter of manhole 13 is 80～100mm.
Further, as shown in Figure 4, for Fig. 4 be the embodiment of the present invention provide differential pressure precooling system in Ice Storage Tank sectional view.Dividing plate in the differential pressure precooling system Ice Storage Tank 1 that the embodiment of the present invention provides is waveform dividing plate 12, and each trough recess of waveform dividing plate 12 is used for housing ice hockey.The distance of the diameter of ice hockey two crests adjacent more than waveform dividing plate 12, and less than the distance between waveform dividing plate about 12 two-layer.Wherein, the ice hockey prepared of ice-making system is adopted to be not necessarily rule spheroid in advance, the distance of diameter two crests adjacent more than waveform dividing plate 12 that ice hockey then requires irregular ice hockey maximum when being irregular, and less than the distance between waveform dividing plate about 12 two-layer.Therefore, the upper and lower sides of ice hockey is respectively formed space, greatly reduces the flow resistance of air and increases the contact area of air and ice hockey, it is possible to accelerate the speed of pre-cooling.
Further, 6 two sidewall panelings of the casing of Ice Storage Tank 19,10 being respectively equipped with multiple fin and baffle plate 11, be used for placing multiple, multilamellar waveform dividing plate 12, in the present embodiment, the width of baffle plate 11 is 30mm.
Present invention also offers a kind of differential pressure precooling method, adopt differential pressure precooling system to carry out pre-cooling.Adopt ice-making system to generate the multiple ice hockeys needed for the differential pressure precooling system that the embodiment of the present invention provides in advance, and ice hockey is put on multiple waveform dividing plate 12；Open the cover plate 7 of Ice Storage Tank 1, the waveform dividing plate 12 being placed with ice hockey is put on the baffle plate 11 of 1 two sidewall panelings of Ice Storage Tank 9,10, after end of operation, cover plate 7 is covered；The multiple fruit and vegetable baskets 2 needing pre-cooling are put in warehouse, and covers canvas 3 in fruit and vegetable basket 2 top；Opening blower fan 5 power supply and extract the air in plenum chamber 4 and then the pressure step-down in plenum chamber 4, one end that namely canvas 3 is connected with plenum chamber 4 forms low-pressure area；Forming higher-pressure region in relative Ice Storage Tank 1 casing 6, flow into fruit and vegerable region after forcing air through ice hockey, carry out quick heat exchange and complete pre-cooling operation, the steam also having brought ice hockey while bringing cold air into into is the moisture that in temperature-fall period, fruit and vegerable supplement loss.
It should be noted that, "left", "right" used herein, " on ", the noun of locality such as D score be define with the component relative position shown in scheming for benchmark, obviously, the application of the above-mentioned noun of locality is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In sum, differential pressure precooling system and method provided by the invention, utilize the Ice Storage Tank being equipped with ice hockey to substitute refrigeration system.Blower fan directly opened by fruit and vegerable agricultural product after putting into system, make the fruit and vegetable basket both sides of accommodating fruit and vegerable agricultural product produce pressure reduction, enable a system to rapid cooling.Meanwhile, the moisture that after blower fan unlatching, ice cube evaporation produces directly contacts fruit and vegetable agricultural product together along with cold air, supplements the moisture that fruit and vegerable agricultural product run off, improve the fresh-keeping rate of fruit and vegerable agricultural product in temperature-fall period.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a differential pressure precooling system, it is characterised in that including:
Negative pressure forms region, cooled region and low-temperature receiver memory area；
Described negative pressure forms region and includes: blower fan and plenum chamber；Described blower fan extracts air in coupled described plenum chamber and forms pressure reduction, makes described low-temperature receiver memory area that the fruit and vegerable in described cooled region to be cooled down；
Described cooled region one end forms region with described negative pressure and is connected, and the other end is connected with described low-temperature receiver memory area；And described negative pressure forms region, described cooled region and described low-temperature receiver memory area and forms nearly confined space.
2. differential pressure precooling system according to claim 1, it is characterised in that described low-temperature receiver memory area includes: side plate, low-temperature receiver discharger and cover plate；
Described side plate and described cover plate surround low-temperature receiver memory area, and described low-temperature receiver discharger connects described side plate, connects with described low-temperature receiver memory area；
Described low-temperature receiver memory block is built-in with multilayer insulating panel, and described dividing plate is placed with multiple ice hockey；The plurality of ice hockey provides low-temperature receiver for described differential pressure precooling system；
Described low-temperature receiver discharger is provided with through hole, and is connected with described cooled region.
3. differential pressure precooling system according to claim 2, it is characterised in that described cover plate is dismountable cover plate, in order to facilitate picking and placeing of described dividing plate.
4. differential pressure precooling system according to claim 2, it is characterised in that the cross section of described dividing plate is waveform, each trough of waveform dividing plate is in order to accommodating ice hockey.
5. differential pressure precooling system according to claim 4, it is characterised in that the diameter of described ice hockey is more than the distance of adjacent two crests of described waveform dividing plate, and less than the distance between the described upper and lower two-layer of waveform dividing plate.
6. the differential pressure precooling system according to any one of claim 2-4, it is characterised in that described low-temperature receiver memory area also includes the fin being located on described side plate, in order to place multiple described dividing plate.
7. the differential pressure precooling system according to any one of claim 2-4, it is characterised in that described through hole is circular, and diameter is 80～100mm.
8. the differential pressure precooling system according to any one of claim 1-4, it is characterised in that described cooled region is the one in canvas or Polypropylence Sheet.
9. a differential pressure precooling method, it is characterised in that adopt the differential pressure precooling system described in any one of claim 1-8 to carry out pre-cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843456.4A CN105794953B (en) | 2014-12-30 | 2014-12-30 | Differential pressure precooling system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410843456.4A CN105794953B (en) | 2014-12-30 | 2014-12-30 | Differential pressure precooling system and method |
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| Publication Number | Publication Date |
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| CN105794953A true CN105794953A (en) | 2016-07-27 |
| CN105794953B CN105794953B (en) | 2019-12-17 |
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| CN201410843456.4A Active CN105794953B (en) | 2014-12-30 | 2014-12-30 | Differential pressure precooling system and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109393009A (en) * | 2018-12-17 | 2019-03-01 | 韶关学院 | A method of accelerating cooling rate during red bayberry vacuum pre-cooling |
| CN114111147A (en) * | 2021-11-16 | 2022-03-01 | 杭州电子科技大学 | Intelligent pressure difference precooling system for agricultural products by adopting fluidized ice |
| CN114586836A (en) * | 2020-12-03 | 2022-06-07 | 中国科学院理化技术研究所 | Pre-cooling system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102986842A (en) * | 2012-12-10 | 2013-03-27 | 华南农业大学 | Fruit differential pressure precooling method and device |
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2014
- 2014-12-30 CN CN201410843456.4A patent/CN105794953B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102986842A (en) * | 2012-12-10 | 2013-03-27 | 华南农业大学 | Fruit differential pressure precooling method and device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109393009A (en) * | 2018-12-17 | 2019-03-01 | 韶关学院 | A method of accelerating cooling rate during red bayberry vacuum pre-cooling |
| CN109393009B (en) * | 2018-12-17 | 2022-03-15 | 韶关学院 | Method for accelerating precooling rate in waxberry vacuum precooling process |
| CN114586836A (en) * | 2020-12-03 | 2022-06-07 | 中国科学院理化技术研究所 | Pre-cooling system |
| CN114111147A (en) * | 2021-11-16 | 2022-03-01 | 杭州电子科技大学 | Intelligent pressure difference precooling system for agricultural products by adopting fluidized ice |
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| Publication number | Publication date |
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| CN105794953B (en) | 2019-12-17 |
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