DK170581B1 - Method and device for air distribution in cargo spaces - Google Patents
Method and device for air distribution in cargo spaces Download PDFInfo
- Publication number
- DK170581B1 DK170581B1 DK42294A DK42294A DK170581B1 DK 170581 B1 DK170581 B1 DK 170581B1 DK 42294 A DK42294 A DK 42294A DK 42294 A DK42294 A DK 42294A DK 170581 B1 DK170581 B1 DK 170581B1
- Authority
- DK
- Denmark
- Prior art keywords
- air
- cargo
- pallets
- variable
- load
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
- B60H1/00014—Combined heating, ventilating, or cooling devices for load cargos on load transporting vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
- B63J2/08—Ventilation; Air-conditioning of holds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Warehouses Or Storage Devices (AREA)
Description
DK 170581 B1DK 170581 B1
Teknikkens område Nærværende opfindelse angår en fremgangsmåde til luftfordeling i lastrum og en indretning til udøvelse af fremgangsmåden. Opfindelsen er især tænkt anvendt til tilfør-5 sel af køleluft til en last i et kølerum på et kølefartøj og frem for alt til kølerum uden gulvrist.Field of the Invention The present invention relates to a method of air distribution in cargo spaces and a device for carrying out the method. In particular, the invention is intended to be used for supplying cooling air to a load in a cold storage room of a cooling vessel and, above all, to cold storage rooms without a floor rack.
Teknikkens standpunkt I moderne kølefartøjer anvendes normalt mekaniske 10 luftcirkulationssystemer, hvor afkølet luft tvinges gennem lasten i kølelastrummet, for at en korrekt lasttemperatur skal kunne opretholdes. I kølelastrum skal der altid efterstræbes en så jævn luftfordeling som muligt, for at lasten ikke skal tage skade eller ødelægges. Lasten kan være indpak-15 ket i kartonner, som kan være stuvede på lastpaller. I konventionelle luftcirkulationssystemer anvendes fortrinsvis gulvriste med huller til fordeling af køleluften i lastrummet, idet lasten står på paller eller direkte på risten og cirkulationsluften tvinges først horisontalt under gulvristen 20 og derefter vertikalt fra gulvristen gennem lasten eksempelvis kartonner med frugt. Kendte luftcirkulationssystemer giver normalt en konstant luftstrømning ind under risten eller ristene. En relativt god fordeling af køleluften kan fås ved en veldimensioneret rist.State of the art In modern refrigeration vessels, mechanical 10 air circulation systems are usually used, where cooled air is forced through the load in the cooling load compartment in order to maintain a proper load temperature. In refrigerated cargo compartments, always aim for as even air distribution as possible, in order not to damage or destroy the cargo. The cargo may be packed in cartons which may be stowed on pallets. In conventional air circulation systems, floor grilles with holes are preferably used to distribute the cooling air in the cargo space, the load being on pallets or directly on the grate and the circulating air is first forced horizontally below the floor grate 20 and then vertically from the floor grate through the cargo, for example, fruit cartons. Known air circulation systems usually provide a constant flow of air under the grate or grilles. A relatively good distribution of the cooling air can be obtained from a well-dimensioned grid.
2525
Redegørelse for opfindelsenDisclosure of the Invention
For bedre at kunne fordele og optimere tilførslen af luft under en last på paller, såsom afkølet luft til kølelastrum med last på paller, selv for systemer uden rist, 30 hvor luften blæses direkte ind under pallerne, er der tilvejebragt en fremgangsmåde til luftfordeling og en indretning hertil, med hvilken fremgangsmåde og indretning luftkaste-længden for den under lastpallerne tilførte luftstrøm kan varieres. I systemer uden rist med indblæsning af luft direk-35 te under pallerne fås altid et ukontrolleret trykfald i forskellige dele af lastrummet afhængigt af hvorlede lasten DK 170581 B1 2 ' er stuvet og hvorledes pallerne er konstruerede.In order to better distribute and optimize the supply of air under a load on pallets, such as cooled air to refrigerated load space with load on pallets, even for systems without grating, where the air is blown directly under the pallets, a method of air distribution and a device for which the method and device of the air throw length of the air flow supplied under the pallets can be varied. In systems with no air supply air directly under the pallets, an uncontrolled pressure drop is always obtained in different parts of the cargo space, depending on how the cargo DK 170581 B1 2 'is stowed and how the pallets are designed.
Ved at styre blæserkapaciteten ved hjælp af eksempelvis en frekvensomformer eller lignende, kan der fås en va-rierbart pulserende luftstrømning med varierbar luftkaste-5 længde, periodiske variationer af kastelængden eller på anden vis varierende kastelængde med eller uden afbrydelse for den resulterende luftstrøm under pallerne, hvilket kan optimere luftfordelingen under lastpallerne i kølerummet, hvorved det effektivt kan undgås, at visse zoner i lasten 10 får for lidt eller bliver helt uden lufttilførsel.By controlling the fan capacity by, for example, a frequency converter or the like, a variable pulsating air flow of variable air throw length, periodic variations of throw length or otherwise varying throw length with or without interruption for the resulting air flow under the pallets can be obtained. which can optimize the air distribution under the cargo pallets in the cold room, thereby effectively preventing certain zones in the cargo 10 from getting too little or being completely without air supply.
FiaurbeskrivelseFiaurbeskrivelse
Fig. 1 viser et forenklet snitbillede af et lastrum i et kølefartøj med en indretning ifølge opfindelsen til 15 fordeling af afkølet luft til last på paller.FIG. 1 shows a simplified sectional view of a cargo compartment in a refrigerated vessel with a device according to the invention for distributing cooled air to cargo on pallets.
Fig. 2 viser tidssammenhaengen mellem a indgående frekvens, b udgående frekvens og c resulterende luftstrømning og blæsertryk fra blæsere.FIG. 2 shows the time relationship between a incoming frequency, b outgoing frequency and c resulting air flow and fan pressure from fans.
20 Beskrivelse af udforelseseksempel I fig. 1 vises i et forenklet snitbillede hvorledes flere eldrevne luftcirkulationsblæsere 1 er placerede over hinanden i forbindelse med luftkanaler bag en lastrumsvæg i et kølefartøj. Med blæserne 1 tilføres afkølet luft til 25 luftkanaler 2 og videre ind under paller 3 med last mellem et lastrumsgulv 8 og pallerne 3. Med pile 9 vises hvorledes afkølet luft strømmer fra kanalerne 2 til mellemrummet 7 mellem lastpallerne 3 og lastrumsgulvet 8. Med 4 betegnes en resulterende pulserende strømning såsom et luftkast fra 30 blæserne 1. Den pulserende luftstrømning er tilvejebragt ved hjælp af blæserne 1, som er omdrejningstalstyrede ved hjælp af en frekvensomformer 5. Et periode- og sekvensreguleringsorgan - en regulator og styreenhed 6, som kan være automatisk eller manuelt indstillet til afgivelse af styre- 4 35 signaler, overfører et for frekvensomformeren 5 passende styresignal til drift af luftcirkulationsblæserne 1. Afhæn- 3 DK 170581 B1 gigt af laststruktur og lastindhold kan der, med kendskab til passende opbevaringstemperatur og detektion af aktuel lastrumstemperatur, ved hjælp af styreenheden 6 tilvejebringes en passende omdrejningstalsvariation med en resulterende 5 varierbart pulserende luftstrømning og en passende luftkaste-længde under pallerne til optimering af køleluftfordelingen med en for lastindholdet korrekt temperatur.Description of Embodiment Example In FIG. 1 is shown in a simplified sectional view of how several electric powered air circulation fans 1 are placed over one another in connection with air ducts behind a cargo hold wall in a cooling vessel. With the fans 1, cooled air is supplied to 25 air ducts 2 and further under pallets 3 with cargo between a cargo floor 8 and the pallets 3. With arrows 9 it shows how cooled air flows from the ducts 2 to the space 7 between the cargo pallets 3 and the cargo room floor 8. a resultant pulsating flow such as an air throw from the blowers 1. The pulsating air flow is provided by the blowers 1 which are speed controlled by a frequency converter 5. A period and sequence control means - a regulator and control unit 6 which can be automatic or manually set to output control signals, transmits a control signal suitable for the frequency converter 5 to operate the air circulation fans 1. Depending on the load structure and load content, with knowledge of appropriate storage temperature and detection of current cargo temperature, with the aid of the control unit 6, an appropriate rpm variation is provided with a resultant 5 variable pulsating air flow and a suitable air-throw length below the pallets to optimize the cooling air distribution at a temperature correct for the load content.
I fig. 2 vises sammenhængen mellem a indgående frekvens, b udgående frekvens og c resulterende luftstrømning 10 og blæsertryk fra blæserne relaterede til en tidsfaktor. Den resulterende varierbart pulserende luftstrømning fra blæserne 1 kommer derefter, ved passage gennem luftkanalen 2 og under lastpallerne 3 i mellemrummet 7 mellem lastpallerne 3 og lastrumsgulvet 8, til at resultere i luftkast 4, 15 som i og for sig vises i fig. l, hvor længden af luftkastet således bliver varierbart afhængigt af styresignalerne fra styreenheden 6.In FIG. 2 shows the relationship between a incoming frequency, b outgoing frequency and c resulting air flow 10 and fan pressure from the fans related to a time factor. The resulting variably pulsating air flow from the fans 1 then, when passing through the air duct 2 and below the pallets 3 in the space 7 between the pallets 3 and the cargo floor 8, results in air throws 4, 15 which are shown in FIG. 1, the length of the air throw thus varying depending on the control signals from the control unit 6.
iin
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9301374A SE501150C2 (en) | 1993-04-23 | 1993-04-23 | Method and apparatus for air distribution in cargo spaces |
SE9301374 | 1993-04-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
DK42294A DK42294A (en) | 1994-10-24 |
DK170581B1 true DK170581B1 (en) | 1995-10-30 |
Family
ID=20389693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK42294A DK170581B1 (en) | 1993-04-23 | 1994-04-13 | Method and device for air distribution in cargo spaces |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPH06344990A (en) |
DE (1) | DE4413944B4 (en) |
DK (1) | DK170581B1 (en) |
NL (1) | NL9400635A (en) |
NO (1) | NO941484L (en) |
SE (1) | SE501150C2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10048116A1 (en) * | 2000-09-28 | 2002-04-11 | Werner & Pfleiderer Lebensmitt | Multi-level bread baking oven has hot air circulation regulated by electric blower frequency converter |
JP5010902B2 (en) * | 2006-11-21 | 2012-08-29 | 中国電力株式会社 | Fishing boat |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE590640C (en) * | 1930-12-14 | 1934-01-12 | Carl Krecke | Procedure for cooling several rooms |
NL99236C (en) * | 1953-09-15 | 1961-09-16 | ||
US3076320A (en) * | 1960-01-04 | 1963-02-05 | Conradi Henrik | Air cooling system for cold storage rooms |
US3546893A (en) * | 1968-10-23 | 1970-12-15 | Frigidome Corp | Control system for storage apparatus |
DE2451361A1 (en) * | 1974-10-29 | 1976-05-06 | Jakob | Coolant circulation in refrigerator of cold-storage plant - controlled drive-motor speeds maintain constant temperature at expansion valve |
DE2501488A1 (en) * | 1975-01-16 | 1976-07-22 | Paul Werner Wilms | Refrigerated foods displayed for sale on standard shelving - cooled by air currents issuing through perforated partition behind shelves |
US4219071A (en) * | 1978-05-26 | 1980-08-26 | Wabco Westinghouse S.P.A. | Air-conditioning system for railroad vehicles |
US4272015A (en) * | 1979-05-31 | 1981-06-09 | Grumman Flexible Corporation | Coach climate conditioning blower control |
SE455857B (en) * | 1986-09-16 | 1988-08-15 | Stal Refrigeration Ab | FRESH CLEANING SYSTEM FOR CARGO COOLING INSTALLATIONS |
DD261775A1 (en) * | 1987-05-07 | 1988-11-09 | Warnowwerft Warnemuende Veb | METHOD FOR THE VENTILATION OF STORAGE ROOMS, ESPECIALLY OF LONG SHIP LOADER |
DE4320183A1 (en) * | 1992-08-13 | 1994-02-17 | Emmanuel Perrakis | Cooling air distribution system for conditioning ship's hold - has fans to blow air through series of segmented ducts on hold wall whose outlets lead to partitioned feeders passing air beneath floor |
-
1993
- 1993-04-23 SE SE9301374A patent/SE501150C2/en not_active IP Right Cessation
-
1994
- 1994-04-13 DK DK42294A patent/DK170581B1/en not_active IP Right Cessation
- 1994-04-20 NL NL9400635A patent/NL9400635A/en active Search and Examination
- 1994-04-21 JP JP8308494A patent/JPH06344990A/en active Pending
- 1994-04-21 DE DE19944413944 patent/DE4413944B4/en not_active Expired - Fee Related
- 1994-04-22 NO NO941484A patent/NO941484L/en unknown
Also Published As
Publication number | Publication date |
---|---|
NL9400635A (en) | 1994-11-16 |
NO941484D0 (en) | 1994-04-22 |
SE501150C2 (en) | 1994-11-28 |
SE9301374L (en) | 1994-10-24 |
DE4413944B4 (en) | 2005-02-24 |
NO941484L (en) | 1994-10-24 |
SE9301374D0 (en) | 1993-04-23 |
DE4413944A1 (en) | 1994-12-01 |
JPH06344990A (en) | 1994-12-20 |
DK42294A (en) | 1994-10-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6539729B2 (en) | Refrigerator airflow distribution system and method | |
US8365549B2 (en) | Device for controlling the refrigeration and humidity inside a drawer movable within a refrigerator | |
EP2499443B1 (en) | Apparatus for maintaining a uniform temperature in a refrigeration system | |
CA1149488A (en) | Ambient air cooling system | |
CA2651674C (en) | Refrigerator with select temperature compartment | |
KR930004397B1 (en) | Refrigerator control system | |
DK170581B1 (en) | Method and device for air distribution in cargo spaces | |
US5715703A (en) | Multiple fan air distribution system for appliances | |
KR970059675A (en) | How to control rapid cooling of refrigerator | |
US6532761B2 (en) | Low temperature physical distribution system and method and apparatus for maintaining quality in auction market | |
KR20080024479A (en) | Cooling and/or freezing device | |
GB1573901A (en) | Refrigerated chest and a method of defrosting it | |
EP3451875B1 (en) | An open-front refrigerator and a method of cooling items therein | |
JP2000356448A (en) | Food deep freezer | |
NL2024403B1 (en) | Cold insulation container | |
US5862609A (en) | Method and apparatus for drying solid foodstuffs | |
US5520006A (en) | Airflow and defrosting system for refrigeration systems and apparatus | |
US3530683A (en) | Refrigeration system for chilling and storing meat products | |
US2467633A (en) | Refrigeration | |
US3076320A (en) | Air cooling system for cold storage rooms | |
WO2021063485A1 (en) | A refrigerator appliance with high freezer capacity | |
US1515546A (en) | Cold-storage system | |
RU2290569C1 (en) | Ventilating apparatus | |
JP2695383B2 (en) | Cold storage and storage method of grain and its warehouse | |
SE455857B (en) | FRESH CLEANING SYSTEM FOR CARGO COOLING INSTALLATIONS |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PBP | Patent lapsed |
Country of ref document: DK |