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WO1995023517A1 - Process for cleaning air especially in cold storage rooms for preserving and ripening fruit vegetables and food - Google Patents

Process for cleaning air especially in cold storage rooms for preserving and ripening fruit vegetables and food Download PDF

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Publication number
WO1995023517A1
WO1995023517A1 PCT/IT1994/000214 IT9400214W WO9523517A1 WO 1995023517 A1 WO1995023517 A1 WO 1995023517A1 IT 9400214 W IT9400214 W IT 9400214W WO 9523517 A1 WO9523517 A1 WO 9523517A1
Authority
WO
WIPO (PCT)
Prior art keywords
filters
air
lamps
zeolite
fans
Prior art date
Application number
PCT/IT1994/000214
Other languages
French (fr)
Inventor
Francesco Brancato
Original Assignee
Domenico Brancato Snc Di Francesco Brancato & C.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Domenico Brancato Snc Di Francesco Brancato & C. filed Critical Domenico Brancato Snc Di Francesco Brancato & C.
Priority to AU12796/95A priority Critical patent/AU1279695A/en
Publication of WO1995023517A1 publication Critical patent/WO1995023517A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/70—Preservation of foods or foodstuffs, in general by treatment with chemicals
    • A23B2/704—Preservation of foods or foodstuffs, in general by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23B2/708—Preservation of foods or foodstuffs, in general by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/70—Preservation of foods or foodstuffs, in general by treatment with chemicals
    • A23B2/704—Preservation of foods or foodstuffs, in general by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23B2/708—Preservation of foods or foodstuffs, in general by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
    • A23B2/712—Preservation of foods or foodstuffs, in general by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O in which an absorbent is placed or used
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B7/00—Preservation of fruit or vegetables; Chemical ripening of fruit or vegetables
    • A23B7/14—Preserving or ripening with chemicals not covered by group A23B7/08 or A23B7/10
    • A23B7/144—Preserving or ripening with chemicals not covered by group A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23B7/148—Preserving or ripening with chemicals not covered by group A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O

Definitions

  • Subject of the invention is a process for cleaning air, particularly that in refrigerators for preserving and ripening fruit vegetables and other food, based substan ⁇ tially on circulation of air by means of a set of filters consisting of granules of zeolite of a macroreticula e and microporous structure.
  • the zeolite granules are activated by placing them in a bath of permanganate of potassium to remove the ethylene by oxidation and fix- ing.
  • Associated with the zeolite filters are UV lamps whose photolithic properties sterilize and disinfect the air .
  • This process is put into effect using an apparatus which, in one preferred construction, consists of a wall-mounted parallelepiped structure with a grid at the top, downward inclined at 45 °. through which air enters, electric centri ⁇ fugal fans, a dust filter, UV lamps, zeolite filters which may or may not need to be activated by a permanganate of potassium bath, and an air outlet grid at the bottom in- clined upward at 45°.
  • the filters preferably lie horizontal and the granules rest on a fine net fixed onto a frame.
  • the UV lamps are placed parallel to the filters.
  • Air is drawn into the apparatus upstream of the filters and is expelled downstream of the lamps and filters.
  • the electric centrifugal fans are placed inside the appara ⁇ tus underneath the upper grid.
  • Air speed can be regulated by a speed variator.
  • the filtering effect can be modified by selecting the num- ber of filters, by air speed and by intensity of the lamps, varying their number and power; a suitable programmer is used to carry out the cycles of treatment automatically establishing operating and non-operating stages of some or all of the lamps and of some or all of the fans.
  • Remote operation through a control panel can be used to turn the lamps and fans on and off, program cleansing of the air, vary air speed and quantity, and the intensity of radia ⁇ tions by keeping on, or turning off, some lamps and fans.
  • the active surface of the zeolite filters is three or four times greater than that of present filters as an ionic exchange of absorption takes place inside the pores of the granules as well as outside.
  • Pressure of air inside the apparatus prevents oxidation and clogging of the pores since the volatile waste products from metabolism cannot accumulate and so are not reabsorbed.
  • Sterilization of air is automatic and can be continuous.
  • the process can be used for all types of fruit and foodstuffs without exception since it is non-toxic, odourless and does not generate ozone.
  • the environment and the products inside the apparatus receive uniform treatment , even in the innermost recesses, by air that circulates and recirculates under pressure through the filters and on the lamps.
  • the filters can be easily changed according to whether the process required is for preserving or ripening. Sterilization can be carried out in operating or storage environments throughout the voids and solids of the food- stuffs treated.
  • a new external contaminated area would, within a few hours, become automatically sterile after possible contamination by persons, other goods or mechanical systems.
  • More filters containing active carbon, useful for elimina- ting other gases, especially ozone, can with advantage be associated to the zeolite filters.
  • the UV lamps can be situated upstream or downstream of the filters as preferred.
  • the advantages of the apparatus may be summarised thus: less labour and chemicals are needed making the process less expensive to run and providing greater security while attain ing results, from a technological standpoint, of the highest level Characteris ics and purposes of the invention will be made still clearer by the following example of its execution illustrated by diagrammat ica1ly drawn figures.
  • Fig. 1 Wall-mounted apparatus for cleaning the air.
  • Fig. 2 Control unit for working the apparatus.
  • the apparatus 10 consists of a metal structurel l with two chambers, an upper one 12 and a lower one 13, both closed by grids, respectively 14 and 15, inclined at about 45° and comprising two doors, 16 and 17, at the front that open on horizontal hinges, 24 and 25 respectively.
  • the upper chamber 12 contains the electric centrifugal fans 20 and 21 with motors 22 and 23 to draw in air from outside through the grid 14, pass it through ducts 18 and 19 inside the intermediate chamber 30 to the point of exit through the lower grid 15.
  • a dust filter 40 Inside the intermediate chamber 30 is a dust filter 40 above, fitted into pairs of lateral supports 41 and 42.
  • the frame 50 for two rectilinear UV lamps 53 and 54 Below said lamps 53 and 54 is a set of horizontal filters 60 sustained by pairs of lateral supports 61 and 62.
  • Each filter 60 consists of a wooden rectangular frame 65 on which granules 70 of zeolite, of a macroreticular and microporous structure, rest on a fine net 66. For the preserving process said granules are made active by immersion in a bath of permanganate of potassium. These filters cannot therefore be regenerated.
  • the UV lamps by photolithic action, thoroughly disinfect and sterilize the air.
  • the control panel 80 for remote operation is connected by a cable 81 to the apparatus 10.
  • Visible items of the apparatus include the programmer 82, the timer 83, amperometer 84, switch 85 for the lamps, pilot lights 86, 90 to show that the lamps are lit, fuses 87, 91, pilot lights 88, 92, to show that the motors 21 and 23 for the electric fans 20 and 21 are working, and the switch 89 for said motors, 22 and 23.
  • the air drawn in by electric fans 20 and 21, passes through the upper grid 14, through the cartridge 40 and having passed by the lamps 53 and 54, carries on through the set of filters 60 to emerge again through the lower grid 15.
  • Speed of air passage is such as to permit removal of gaseous substances and impurities, generally present in the environ ⁇ ment, and which are then deposited in the filters.
  • the UV lamps irradiate the air, sterilizing it and, by photo- lithic action ,e1iminate microorganisms, yeasts (spores) and fung
  • the air leaves the apparatus steri ⁇ lized and cleaned since the zeolite granules hold back impu ⁇ rities and gaseous substances such as carbon dioxide, ammonia sulphur dioxide, hydrogen sulphide and other volatile and noxious products that develop inside the refrigerator due to the intense metabolic process during stages of ripening.
  • Oxidation and clogging of the pores is prevented as, during ventilation, the volatile waste products , created by metabolic changes , cannot accumulate and are therefore not reabsorbed.
  • the zeolite granules of the filters activated by the bath of permanganate of potas ⁇ sium, react by oxidizing and fixing the ethylene produced by the ' fruit .
  • the air sterilized by UV rays kills germs and inhibits certain organisms and growth of fungi.
  • the fungi and moulds that generally form in refrigerated containers are carried away by air thrust from the fans thus improving the organolep ic ' properties of the products. It is clear that the apparatus and the process obtained by means of it can be used not only in refri eration but in many other places such as warehouses, storerooms for production and preservation of dried or dehydrated foods, in laboratories and in the production of pork products, cheese and bread, in vineyards and in nurseries, in pro ⁇ Des for the fermentation of paper, in the milk and dairy industries, in agriculture and in transport generally

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Mushroom Cultivation (AREA)

Abstract

Apparatus (10) and process for cleaning air, especially the air in refrigeration rooms for preserving and ripening fruit, vegetables and food products generally, said air being made to circulate by electric fans (20, 21) through filters (60) formed of granules (70) of zeolite, filters of active carbon, ultraviolet rays emitted by lamps (53, 54).

Description

Process for cleaning air especially in cold storage rooms for preserving and ripening fruit vegetables and food
Preservation and rapid ripening of fruit, vegetables and other food products in refrigerated containers by the use of modern and technologically sophisticated processes plays an important part in maintaining intact the high quality of the food items concerned.
These technological processes therefore constitute a fac¬ tor for raising income but such is their cost that their use is only economically viable for high grade products of excellent appearance and flavour.
Not only must the physical conditions (temperature, humi¬ dity, ventilation) of the air be maintained but also the level of purity which the natural atmosphere possesses when the process is commenced.
This applies both to composition of atmospheric gases "and also to the quantity of bacteria present.
What occurs now however is that, in certain complex meta- bolical processes, various gases and volatile substances are given off in the refrigerated compartments and these seriously pollute the atmosphere to the extent that nega¬ tive consequences follow.
Condensation of water in particular frequently exposes the products to attack by harmful bacteria and germs which proliferate in an uncontrolled manner leading to develop¬ ment of epidemicts and to the growth of fungi. At present, therefore, various techniques and methods are adopted for cleaning and sterilizing the air inside the refrigerators . During the process of preservation permanganate of potas¬ sium is used on balls of alumina on whose surfaces oxidat ion of ethylene takes place.
To remove CO , volatile substances and unpleasant odours while ripening is in progress, ventilation either manual or automatic is provided.
Bacteria and germs are eliminated by specific chemical pro¬ ducts such as fumigants and others spread throughout the environment by nebul izat ion . Even so, use of these products leaves some problems unsolved. Regulations now in force, especially those issued by the EC, severely limit the use of such products by establishing maximum quantities and tolerances of residual chemicals remaining on fruit and on other food products. Effectiveness of many such chemical products is known to be low.
The organoleptic properties, especially of fruit and vege¬ tables, often suffer from use of these products and the presence of 'additives as well as of unpleasant odours may be clearly noted. The above invention offers great advantages compared with techniques at present in use and solves many serious prob¬ lems as will be explained below. Subject of the invention is a process for cleaning air, particularly that in refrigerators for preserving and ripening fruit vegetables and other food, based substan¬ tially on circulation of air by means of a set of filters consisting of granules of zeolite of a macroreticula e and microporous structure.
Where preservation is concerned, the zeolite granules are activated by placing them in a bath of permanganate of potassium to remove the ethylene by oxidation and fix- ing. Associated with the zeolite filters are UV lamps whose photolithic properties sterilize and disinfect the air .
This process is put into effect using an apparatus which, in one preferred construction, consists of a wall-mounted parallelepiped structure with a grid at the top, downward inclined at 45 °. through which air enters, electric centri¬ fugal fans, a dust filter, UV lamps, zeolite filters which may or may not need to be activated by a permanganate of potassium bath, and an air outlet grid at the bottom in- clined upward at 45°.
The filters preferably lie horizontal and the granules rest on a fine net fixed onto a frame.
The UV lamps are placed parallel to the filters.
Air is drawn into the apparatus upstream of the filters and is expelled downstream of the lamps and filters.
The electric centrifugal fans are placed inside the appara¬ tus underneath the upper grid.
Air speed can be regulated by a speed variator. The filtering effect can be modified by selecting the num- ber of filters, by air speed and by intensity of the lamps, varying their number and power; a suitable programmer is used to carry out the cycles of treatment automatically establishing operating and non-operating stages of some or all of the lamps and of some or all of the fans. Remote operation through a control panel can be used to turn the lamps and fans on and off, program cleansing of the air, vary air speed and quantity, and the intensity of radia¬ tions by keeping on, or turning off, some lamps and fans.
There are clearly many advantages to be obtained by this process . The active surface of the zeolite filters is three or four times greater than that of present filters as an ionic exchange of absorption takes place inside the pores of the granules as well as outside.
Pressure of air inside the apparatus prevents oxidation and clogging of the pores since the volatile waste products from metabolism cannot accumulate and so are not reabsorbed.
Pressure of air also inhibits growth of fungi and moulds
(spores) that develop in refrigerated compartments.
No specialized operators are needed. Sterilization of air is automatic and can be continuous.
The process can be used for all types of fruit and foodstuffs without exception since it is non-toxic, odourless and does not generate ozone.
With this system the organoleptic properties of fruit and vegetables kept in the refrigerated compartments suffer no adverse effects .
The environment and the products inside the apparatus receive uniform treatment , even in the innermost recesses, by air that circulates and recirculates under pressure through the filters and on the lamps.
As the process inhibits the ripening stage, pulp does not soften but, remaining firm, is less subject to attack by fungi. Synergia between absorption of ethylene and s erilization of the air by UV rays makes fruit resistent in a way that would not be possible if the processes were separate. Similarly, synergic action by the UV rays and permitted chemicals or fumigators is highly effective.
The filters can be easily changed according to whether the process required is for preserving or ripening. Sterilization can be carried out in operating or storage environments throughout the voids and solids of the food- stuffs treated.
While with present systems there is always a risk of em¬ ploying quantities of additives and fumigators greater than permitted levels, both during refrigeration and in other stages of the work such as washing, sizing, drying etc. , the above method avoids any such risk.
While the process is proceeding, staff can enter the treated environment, the process being harmless as radiation is not directed outward but remains inside the apparatus. Staff can gain access at any time since doors, where needed, can open and close without impediment.
A new external contaminated area would, within a few hours, become automatically sterile after possible contamination by persons, other goods or mechanical systems. More filters containing active carbon, useful for elimina- ting other gases, especially ozone, can with advantage be associated to the zeolite filters.
The UV lamps can be situated upstream or downstream of the filters as preferred. The advantages of the apparatus may be summarised thus: less labour and chemicals are needed making the process less expensive to run and providing greater security while attain ing results, from a technological standpoint, of the highest level Characteris ics and purposes of the invention will be made still clearer by the following example of its execution illustrated by diagrammat ica1ly drawn figures. Fig. 1 Wall-mounted apparatus for cleaning the air. Fig. 2 Control unit for working the apparatus.
The apparatus 10 consists of a metal structurel l with two chambers, an upper one 12 and a lower one 13, both closed by grids, respectively 14 and 15, inclined at about 45° and comprising two doors, 16 and 17, at the front that open on horizontal hinges, 24 and 25 respectively.
The upper chamber 12 contains the electric centrifugal fans 20 and 21 with motors 22 and 23 to draw in air from outside through the grid 14, pass it through ducts 18 and 19 inside the intermediate chamber 30 to the point of exit through the lower grid 15.
Inside the intermediate chamber 30 is a dust filter 40 above, fitted into pairs of lateral supports 41 and 42. Below said filter 40, on the pairs of lateral supports 5! and 52, is the frame 50 for two rectilinear UV lamps 53 and 54. Below said lamps 53 and 54 is a set of horizontal filters 60 sustained by pairs of lateral supports 61 and 62. Each filter 60 consists of a wooden rectangular frame 65 on which granules 70 of zeolite, of a macroreticular and microporous structure, rest on a fine net 66. For the preserving process said granules are made active by immersion in a bath of permanganate of potassium. These filters cannot therefore be regenerated. The UV lamps, by photolithic action, thoroughly disinfect and sterilize the air. The control panel 80 for remote operation is connected by a cable 81 to the apparatus 10. Visible items of the apparatus include the programmer 82, the timer 83, amperometer 84, switch 85 for the lamps, pilot lights 86, 90 to show that the lamps are lit, fuses 87, 91, pilot lights 88, 92, to show that the motors 21 and 23 for the electric fans 20 and 21 are working, and the switch 89 for said motors, 22 and 23.
The air, drawn in by electric fans 20 and 21, passes through the upper grid 14, through the cartridge 40 and having passed by the lamps 53 and 54, carries on through the set of filters 60 to emerge again through the lower grid 15.
Speed of air passage is such as to permit removal of gaseous substances and impurities, generally present in the environ¬ ment, and which are then deposited in the filters. The UV lamps irradiate the air, sterilizing it and, by photo- lithic action ,e1iminate microorganisms, yeasts (spores) and fung In the ripening process the air leaves the apparatus steri¬ lized and cleaned since the zeolite granules hold back impu¬ rities and gaseous substances such as carbon dioxide, ammonia sulphur dioxide, hydrogen sulphide and other volatile and noxious products that develop inside the refrigerator due to the intense metabolic process during stages of ripening. Oxidation and clogging of the pores is prevented as, during ventilation, the volatile waste products , created by metabolic changes , cannot accumulate and are therefore not reabsorbed. During the process of preservation the zeolite granules of the filters, activated by the bath of permanganate of potas¬ sium, react by oxidizing and fixing the ethylene produced by the' fruit . In all cases the air sterilized by UV rays kills germs and inhibits certain organisms and growth of fungi.
The fungi and moulds that generally form in refrigerated containers are carried away by air thrust from the fans thus improving the organolep ic ' properties of the products. It is clear that the apparatus and the process obtained by means of it can be used not only in refri eration but in many other places such as warehouses, storerooms for production and preservation of dried or dehydrated foods, in laboratories and in the production of pork products, cheese and bread, in vineyards and in nurseries, in pro¬ cesses for the fermentation of paper, in the milk and dairy industries, in agriculture and in transport generally

Claims

C l a ims
1. Apparatus ( 10) for cleaning air especially that in refrigeration rooms for preserving and ripening fruit, vegetables and food products generally, characterized in that the air is made to recirculate through a series of filters (60) formed of granules (70) of zeolite whose structure is macroreticular and micro- porous .
2. Apparatus ( 10) as in claim 1, characterized in that if it is a case of preserving pro¬ ducts the zeolite granules (70) are made active by immersion in a bath of permanganate of potassium for the purpose of eliminating the ethylene by a process of oxidation and fixing .
3. Apparatus ( 10) as in claim !, characterized in that the filters (60) are placed horizon¬ tally and the zeolite granules (70) rest on a fine net (66) attached to a frame.
4. Apparatus ( 10) as in claim 1, charac erized in that together with the filters (60) of zeo¬ lite (70), there are UV lamps (53)(54) whose photolithic properties serve to sterilize and disinfect the air.
5. Apparatus ( 10) as in claim 1, characterized in that the ultraviolet ray lamps (53) (54) are placed upstream of the filters (60).
6. Apparatus ( 10) as in claim 4, characterized in that the ultraviolet ray lamps (53) (54) are placed downstream of the filters (60).
7. Apparatus ( 10) as in claim 4, characterized in that the ultraviolet ray lamps (53) (54) are placed parallel to the filters (60).
8. Apparatus ( JO) as in claims 1 and 4, characterized in that the air is pressurised inside the apparatus being drawn in upstream of the filters (60) and expelled downstream of the filters (60) and of the lamps (53) (54).
9. Apparatus ( 10) as in claim 6, characterized in that the air is pressurised by means of centrifugal electric fans (20,21) placed at the top of the apparatus.
10. Apparatus ( 10) as in claim 1, characterized in that air speed is regulated by a speed variator.
11. Apparatus ( 10) as in claim 1, characterized in that its structure ( 11) is parallelepiped and in that it has two inclined grids ( 14, 15) for entry and exit of the air, one grid at the top of the apparatus and one at the bottom.
12. Apparatus ( 10) as in claim I, characterized in that a dust filter (40) is placed upstream of the filters (60) of zeolite (70).
13. Apparatus ( 10) as in claim 1, characterized in that in a preferred execution its wall- mounted parallelepiped structure ( I I) comprises an upper grid ( 14) inclined downward at 45° through which air enters, centrifugal electric fans (20,21) and, laid horizontally in the following order, dust filters (40),UV lamps (53,54), filters (60) of zeolite (70) whether or not made active by immersion in a bath of pamanganate of potassium, a grid (15) for outflow of air sloping upward at 45°.
14. Apparatus ( 10) as in claims 1, 4 and 9, characterized in that remote operation is possible through a control panel (80) for turning on and off the lamps (53,54 for turning the fans (21,22) on and off, for programming one or more sequences of treatment turning the lamps (53, 54) and the fans (20,21) on and off, establishing certain operative and inoperative stages for some or all of the lamps (53, 54) and for some or all of the fans (20, 21), for varying as required the speed and quantity of air and intensity of radiation by respectively turning on and off some of the lamps (53, 54) and some of the fans (20, 21).
15. Apparatus ( 10) as in claim 1, characterized in that associated to the filters (60) of zeolite (70) are other filters containing active carbon which is useful for eliminating other gases especially ozone.
16. Process for cleaning air especially air in refrigera¬ tion rooms for preserving and ripening fruit and vegetables and food products generally, characterized in that the air is made to circulate by means of fans (20,21) inside an apparatus ( 10) through a series of filters (60) consisting of granules (70) of zeolite of a macroreticular and microporous structure.
17. Process as in claim 16, characterized in that in the case of product preservation the granules (70) of zeolite are rendered active by immer¬ sion in a bath of permanganate of potassium to obtain re¬ moval of ethylene by a process of oxidation and fixing.
18. Process as in claim 16, characterized in that ultraviolet ray lamps (53, 54) are associated to the filters (60) of zeolite (70) to exploit the photolithic properties of said lamps for sterilizing and disinfecting the air.
19. Process as in claims 16 and 18, characterized in that the air is forced inside the appara- tis ( 10) after being drawn in upstream and expelled downstream of the filters (60) and of the lamps (53, 54).
20. Process as in claims from 16 to 19, characterized in that the filtering effect can be regula¬ ted as desired by choosing the number of filters (60), the speed of air, intensity of the lamps (53, 54) by varying their number and power, by programming automatic sequences of treatment, establishing operative or inoperative stages for some or all of the lamps (53, 54) and for some or all of the fans (20,21).
PCT/IT1994/000214 1994-03-01 1994-12-19 Process for cleaning air especially in cold storage rooms for preserving and ripening fruit vegetables and food WO1995023517A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU12796/95A AU1279695A (en) 1994-03-01 1994-12-19 Process for cleaning air especially in cold storage rooms for preserving and ripening fruit vegetables and food

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI940364A IT1273353B (en) 1994-03-01 1994-03-01 PROCEDURE FOR THE STORAGE AND RIPENING OF FRUIT AND VEGETABLE PRODUCTS IN SPECIES IN REFRIGERATOR CELLS
ITMI94A000364 1994-03-01

Publications (1)

Publication Number Publication Date
WO1995023517A1 true WO1995023517A1 (en) 1995-09-08

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IT (1) IT1273353B (en)
WO (1) WO1995023517A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1501371A4 (en) * 2002-04-19 2005-11-09 Tilia Int Inc CONTAINER FOR STORING FOODS AND FILTERS
EP1982734A1 (en) * 2007-04-19 2008-10-22 Akos Advanced Technology Ltd. A method and apparatus for fluid purification
CN103380811A (en) * 2013-07-04 2013-11-06 浙江月宫冷链设备有限公司 Ethane-removing device used for air-conditioned storehouses
EP3123872A1 (en) * 2015-07-27 2017-02-01 Somez System for stabilising fresh products
CN112569743A (en) * 2020-12-11 2021-03-30 中国卫星海上测控部 Vegetable cold storage harmful gas removing machine based on zeolite
WO2023036737A3 (en) * 2021-09-08 2023-05-19 Maersk Container Industry A/S Systems and methods for storing produce

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JPH01300847A (en) * 1988-05-26 1989-12-05 Matsushita Electric Works Ltd Food preserving device
JPH04179437A (en) * 1990-11-13 1992-06-26 Matsushita Refrig Co Ltd Freshness-keeping apparatus for refrigerator
JPH0593580A (en) * 1991-10-03 1993-04-16 Matsushita Electric Ind Co Ltd refrigerator
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JPS6163240A (en) * 1984-09-05 1986-04-01 Shiraishi Chuo Kenkyusho:Kk Freshness preservative
JPS61293375A (en) * 1985-06-21 1986-12-24 Nippon Chem Ind Co Ltd:The Freshness preservative
JPS63229118A (en) * 1987-03-19 1988-09-26 Sumitomo Heavy Ind Ltd Adsorption and separation method for ethylene in gas
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ITMI940364A0 (en) 1994-03-01

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