EP0572062B1 - Dispositif de traitement de produits agricoles et horticoles - Google Patents

Dispositif de traitement de produits agricoles et horticoles Download PDF

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Publication number
EP0572062B1
EP0572062B1 EP93201371A EP93201371A EP0572062B1 EP 0572062 B1 EP0572062 B1 EP 0572062B1 EP 93201371 A EP93201371 A EP 93201371A EP 93201371 A EP93201371 A EP 93201371A EP 0572062 B1 EP0572062 B1 EP 0572062B1
Authority
EP
European Patent Office
Prior art keywords
duct
air
suction passage
chamber
suction
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP93201371A
Other languages
German (de)
English (en)
Other versions
EP0572062A1 (fr
Inventor
Pieter Sjoerd Tolsma
Cornelis Marten Tolsma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOLSMA TECHNIEK BV
Original Assignee
TOLSMA TECHNIEK BV
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 TOLSMA TECHNIEK BV filed Critical TOLSMA TECHNIEK BV
Publication of EP0572062A1 publication Critical patent/EP0572062A1/fr
Application granted granted Critical
Publication of EP0572062B1 publication Critical patent/EP0572062B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure

Definitions

  • the invention relates to a device for the treatment of agricultural and horticultural products according to the preamble of claim 1.
  • Such a device is known from US-A-4 257 169 and is suitable for controlling the temperature and the degree of humidity in a storage room so that products stored therein can be gradually dried and cooled.
  • the device is further provided with an inlet for ambient air. This makes it possible to save energy and consequently costs by allowing ambient air if it is compatible with the requirements which the air to be supplied to the storage room should meet.
  • the invention fulfills the object of providing a device for supplying dry and cool air to a storage room, in which the problems described above are eliminated.
  • the relatively cool air can be blown out over the stored products, so that it can be distributed well over the stored products and there can be no pipes running along the top of the stored products.
  • the air velocity will be relatively high in the area of the storage room near the intake opening.
  • the air passing there has already passed through the stored products, so that their drying and cooling effects have waned. So despite the compact construction of the system with locally concentrated suction and discharge openings, a uniformly distributed cooling and drying effect is achieved and condensation due to temperature differences between the stored products is avoided.
  • FIGS. 1 and 2 show a warehouse with a storage room 1 in which boxes 2 are set up. These boxes 2 contain the agricultural and horticultural products to be stored and treated. The boxes are provided with ventilation openings (not shown) to promote air movement between the products. Only the device 4 is shown in more detail in FIGS. 3 and 4.
  • a device 4 is set up.
  • the device 4 comprises a channel 5 in which a fan 6 is arranged.
  • the device is further provided with a first intake passage 7 for the passage of air from the space 1 to the duct 5, a second intake passage 8 for the passage of air from the surroundings to the passage and with discharge passages 9, 10, 11 for the passage of air from the passage 5 to room 1.
  • the device further comprises means 12 for opening and closing the intake passages 7 and 8.
  • the heat exchanger 13 is connected to the first intake passage 7 and the blowout passages 9, 10, 11 are at a higher level than the first intake passage 7.
  • the device 4 is suitable for treating agricultural and horticultural products in a storage room 1 in order to dry and cool them, as a result of which they are well preserved for a long time when they are stored in the storage room 1.
  • the treatment includes forced ventilation with outside air to dry the products, ventilation with forced air recirculation in room 1 to achieve an even temperature distribution over the products in storage room 1, and cooling of the products.
  • cooling is carried out by forcing cool air into the room 1 at a level above the products stored in the room, and in the case of recirculation Air sucked in at a level below the level at which it is blown into the room.
  • the second intake passage 8 is closed and the first intake passage 7 is released.
  • the air is then sucked in by the fan 6 via the heat exchanger 13 and the first suction passage 7 and also blown out via the blow-out passages 9 to 11.
  • the ventilation openings 15 must then preferably be closed.
  • both the first suction passage 7 and the second suction passage 8 can be opened in order to mix air drawn in from outside and warmer ambient air.
  • the intake air be at a temperature of 4 ° C
  • the intake passages 7 and 8 are released to such an extent that two parts of air are sucked out of room 1 into one part of outside air.
  • the heat exchanger 13 By blowing out the air at a level higher than the level at which it is sucked in, the heat exchanger 13 can be arranged in a low-lying part of the storage room 1 near the first suction passage, while still cooling air is introduced into an upper part of the storage room 1 can. As a result, the heat exchanger 13 is easily accessible for cleaning and maintenance purposes and only relatively short lines for coolant and for removing condensed water are necessary.
  • the heat exchanger 13 of the device 4 is designed as an evaporator 13. This is connected via a line 16 to a capacitor (not visible in the drawing) arranged in a housing 17 outside the storage room 1. A compressor is also arranged in the housing 17. In addition to the heat given off by the condenser, heat given off by the compressor is also given off outside the storage room 1.
  • the evaporator-compressor-condenser unit can also be set up to work in the opposite direction, if necessary, for heating the storage room 1.
  • the cool air that is blown out over the products in the storage room 1 has ample opportunity to spread before it flows along the products, so that a uniform cooling of the products is achieved. This prevents the formation of condensation.
  • recirculation occurs only relatively large near the first intake passage 7 Differences in air speed. However, this leads to little temperature differences in the storage room 1, because air present near the first intake passage 7 has meanwhile flowed along the products, as a result of which their temperature differs only slightly from the temperature of the products.
  • the closely spaced blow-out passages 9 to 11 are sufficient to achieve an even distribution of air movement through space 1 because the air can easily spread over the products.
  • the device according to the invention can thus be made very compact.
  • blow-out passages 9 to 11 which are directed in different directions
  • a single blow-out passage having a width adapted to the width of the wall 3 or a plurality of blow-out passages distributed along the wall 3 or over the surface of the space 1.
  • such designs are less crowded than the embodiment shown in the drawing.
  • the device 4 When using the device 4 in a storage room as shown in the drawing, for example, no ventilation wall against which the boxes 2 are placed is required. As a result, the device 4 can also Stack of boxes are standing. The air can simply be drawn in near the floor. If necessary, the boxes can be placed at suitable locations with a space 14 in order to promote an even distribution of the air movement.
  • the means for opening and closing the intake passages 7 and 8 are designed as a changeable flap 12 which can be moved between a first and a second position and which, in the first position (see FIGS. 3 and 4), closes the first intake passage 7 and releases the second intake passage 8, in the second position (see FIG. 1) closes off the second intake passage 8 and releases the first intake passage 7 and partially releases the first and second intake passages in intermediate positions.
  • both suction passages 7 and 8 can thus be closed or released alternately and the ratio between the quantities of through the first and the second suction passage can also be changed sucked air can be regulated.
  • the flap is also easy to operate.
  • the suction passages 7 and 8 open into a chamber 18, the fan 6 being arranged in a part of the channel 5 adjacent to this chamber 18 and the channel 5 being designed as a delivery channel, the blow-out passage being at a distance above the chamber 18.
  • the device according to the embodiment shown in the drawing shows a particularly compact shape.
  • the device 4 can be manufactured in various versions, in which the blow-out passages 9 to 11 are at a height adapted to the room height, simply by giving the feed channel 5 a corresponding length.
  • the chamber 18 can always be of identical design.
  • the second intake passage 8 is delimited by a channel wall 19 which is displaceable in the passage 18 in the chamber 18.
  • a channel wall 19 which is displaceable in the passage 18 in the chamber 18.
  • the interchangeable flap 12 is connected to the duct wall 19 via a hinge connection 21 located below and in its second position (see FIG. 1) connects to the inner end of the duct wall 19, whereby the second intake passage 8 is closed.
  • the interchangeable flap 12 is of such a length that in the first position (see FIGS. 3 and 4) its free edge, when the channel wall 19 is in its most outwardly pushed position, still over the upper edge of the first intake passage 7 to the Wall of the chamber 18 on the side of the first intake passage 7 connects.
  • the side edges of the flap 12 adjoin the adjacent side walls of the chamber 18. So regardless of the position of the channel passage 19 with respect to the chamber 18, an effective sealing of the first intake passage 7 and the second intake passage 8 can be reached when the interchangeable flap 12 is in the first position.
  • the means for closing off the second intake passage 8 - in the device 4 according to the present exemplary embodiment, these are formed by the interchangeable flap 12 - are preferably thermally insulated. This limits heat losses during recirculation. In the device according to the embodiment shown in the drawing, it is also prevented that, in warm, humid weather and when the heat exchanger is operating, moisture condenses against the outside of the flap 12 in the second position.
  • the channel wall 19 is preferably also thermally insulated, so that heat losses along its part projecting in the chamber 18 and condensation against this part are prevented.
  • the heat exchanger can be arranged, for example, at the top in the chamber 18 or in the channel 5. This makes it possible to cool the sucked-in ambient air by cooling before it is blown into the storage room 1. This is advantageous under conditions in which, for example, the ambient air has a lower absolute moisture content than the air in storage room 1, but this moisture content is not low enough to use this ambient air without cooling.

Claims (5)

  1. Dispositif pour le traitement de produits agricoles et horticoles dans un local de stockage (1), comprenant un conduit (5), un ventilateur (6) dans ce conduit, un premier passage d'aspiration (7) pour laisser passer de l'air hors du local (1) vers le conduit (5), un second passage d'aspiration (8) pour laisser passer de l'air depuis l'environnement vers le conduit (5), et des passages de soufflage (9 à 11) pour laisser passer de l'air hors du conduit (5) vers le local (1), des moyens (12) pour ouvrir et fermer les passages d'aspiration (7 et 8), et un échangeur de chaleur (13) pour refroidir l'air, les passages d'aspiration (7 et 8) débouchant dans une chambre (18), caractérisé en ce que:
    - les moyens pour ouvrir et fermer les passages d'aspiration (7 et 8) sont réalisés sous forme d'un clapet d'inversion (12) mobile entre une première et une seconde position, lequel referme dans la première position le premier passage d'aspiration (7) et libère le second passage d'aspiration (8), et dans la seconde position, il referme le second passage d'aspiration (8) et libère le premier passage d'aspiration (7), et dans les positions intermédiaires, il libère partiellement respectivement le premier et le second passage d'aspiration (7 et 8),
    - le premier passage d'aspiration (7) comporte une ouverture d'aspiration concentrée localement pour aspirer de l'air directement hors du local (1),
    - le clapet d'inversion (12) est agencé dans cette chambre (18),
    - plusieurs passages de soufflage (9 à 11) sont agencés de manière concentrée localement et à distance au-dessus de la chambre (18) et sont dirigés dans au moins deux directions, pour distribuer de l'air soufflé dans le local (1) dans lequel est agencé le dispositif, et
    - le conduit est réalisé sous forme d'un conduit d'alimentation (5) qui s'étend depuis la chambre (18) vers le haut jusqu'aux passages de soufflage (9 à 11).
  2. Dispositif selon la revendication 1, caractérisé en ce que le ventilateur (6) est agencé dans une partie du conduit (5) adjacente à la chambre (18).
  3. Dispositif selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que le second passage d'aspiration (8) est limité par une paroi de conduit (19) qui est mobile dans la direction de passage dans la chambre (18).
  4. Dispositif selon les revendications 1 et 3, caractérisé en ce que le clapet d'inversion (12) est relié à la paroi de conduit (19) le long de sa bordure inférieure au moyen d'une liaison à charnière, en ce que le clapet se raccorde dans sa première position de façon étanche contre une extrémité intérieure, inclinée en oblique vers l'arrière, de la paroi de conduit (19), et en ce que dans sa seconde position, indépendamment de la position de la paroi de conduit (19) par rapport à la chambre (18), le clapet se raccorde par sa bordure libre au-dessus du premier passage d'aspiration (7) à une paroi de la chambre (18) sur le côté de ce passage d'aspiration (7), et se raccorde par ses bordures latérales aux parois latérales de la chambre (18), qui se raccordent à cette paroi du côté de ce passage d'aspiration (7).
  5. Dispositif selon l'une dcs revendications précédentes, caractérisé en ce que le clapet d'inversion est isolé thermiquement.
EP93201371A 1992-05-14 1993-05-13 Dispositif de traitement de produits agricoles et horticoles Expired - Lifetime EP0572062B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9200854A NL9200854A (nl) 1992-05-14 1992-05-14 Werkwijze en inrichting voor het behandelen van land- en tuinbouwprodukten in een opslagruimte.
NL9200854 1992-05-14

Publications (2)

Publication Number Publication Date
EP0572062A1 EP0572062A1 (fr) 1993-12-01
EP0572062B1 true EP0572062B1 (fr) 1997-08-06

Family

ID=19860797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93201371A Expired - Lifetime EP0572062B1 (fr) 1992-05-14 1993-05-13 Dispositif de traitement de produits agricoles et horticoles

Country Status (5)

Country Link
EP (1) EP0572062B1 (fr)
DE (1) DE59307049D1 (fr)
ES (1) ES2108207T3 (fr)
GR (1) GR3025202T3 (fr)
NL (1) NL9200854A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012089C2 (nl) * 1999-05-18 2000-11-21 Tolsma Techniek B V Luchtbehandelingsinrichting.
FR2828730B3 (fr) * 2001-08-14 2003-08-08 Engeenering Batiments Et Distr Procede et installation pour la conservation et/ou le sechage de produits alimentaires, et en particulier de fruits, legumes, ou cereales
ITME20040005A1 (it) * 2004-05-03 2004-08-03 Domenico Brancato Di Francesco Procedimento perfezionato per incrementare e regolare la circolazione forzata di aria nelle celle frigorifere, mediante una apparecchiatura mobile agente in un corridoio tra due file di prodotti ortofrutticoli disposti in confezioni.
SE540657C2 (sv) 2013-06-18 2018-10-09 Nilsson Johan Ventilationssystem för jordbruks- och trädgårdsprodukter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2710254A1 (de) * 1976-03-10 1977-09-15 Waelti Ag Geb Verfahren und vorrichtung zum belueften von farbspritzanlagen
US4458583A (en) * 1981-05-08 1984-07-10 Nippondenso Co., Ltd. Air conditioner control system for automotive vehicles
EP0244891A1 (fr) * 1986-04-01 1987-11-11 NIRO Atomizer B.V. Appareil de ventilation d'une cabine de peinture

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE32254C (de) * 1885-02-10 1885-07-16 FRIED. FlLLER & HlNSCH in Hamburg Luftverteiler mit Ventilationsrad
GB191012467A (en) * 1910-05-23 1911-03-02 James Macmeikan An Improved Air Circulating Apparatus.
CH100004A (de) * 1921-09-03 1923-07-02 Klein Dr Albert Verfahren zur Behandlung fester oder flüssiger Körper mit Gasen oder Dämpfen.
GB503854A (en) * 1936-10-23 1939-04-14 Svenska Flaektfabriken Ab Improvements in ventilation devices for drying plants
US4257169A (en) * 1978-12-11 1981-03-24 Jack Pierce Commodity dryer
US5054291A (en) * 1990-07-25 1991-10-08 Davis Thomas L Multi-bay system for the forced air postharvest conditioning of agricultural crops

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2710254A1 (de) * 1976-03-10 1977-09-15 Waelti Ag Geb Verfahren und vorrichtung zum belueften von farbspritzanlagen
US4458583A (en) * 1981-05-08 1984-07-10 Nippondenso Co., Ltd. Air conditioner control system for automotive vehicles
EP0244891A1 (fr) * 1986-04-01 1987-11-11 NIRO Atomizer B.V. Appareil de ventilation d'une cabine de peinture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GB-A-K12467 (MACMEIKAN) *

Also Published As

Publication number Publication date
ES2108207T3 (es) 1997-12-16
DE59307049D1 (de) 1997-09-11
EP0572062A1 (fr) 1993-12-01
NL9200854A (nl) 1993-12-01
GR3025202T3 (en) 1998-02-27

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