EP0058782A1 - Cold-storage building - Google Patents
Cold-storage building Download PDFInfo
- Publication number
- EP0058782A1 EP0058782A1 EP81200229A EP81200229A EP0058782A1 EP 0058782 A1 EP0058782 A1 EP 0058782A1 EP 81200229 A EP81200229 A EP 81200229A EP 81200229 A EP81200229 A EP 81200229A EP 0058782 A1 EP0058782 A1 EP 0058782A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cold
- tunnel
- storage building
- air
- gap
- 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.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F9/00—Use of air currents for screening, e.g. air curtains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/02—Doors; Covers
- F25D23/023—Air curtain closures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/068—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the fans
- F25D2317/0681—Details thereof
Definitions
- the invention has for its object to provide a cold storage building having an air curtain, the properties of which come up better to the theoretical prognostications so that in addition optimizing steps can be taken, for example, with regard to local conditions to be expected whilst the adverse effect of wind is strongly reduced.
- Fig. 1 shows a cold-storage building 101 according to the invention.
- the air in the cold space 102 bounded by the front wall 103 and the further walls is cooled by a cooling unit 104, which sucks in air, extracts heat therefrom and gives off the air thus cooled to the cold space.
- the front wall 103 has a hole 105 joining the ground, and communicating with a tunnel 106 of rectangular cross- section extending in the cold space 102.
- a suction/blowing unit 107 is arranged on the top wall 109 of the tunnel so that air is sucked in from the cold space 102 and is caused to leave the unit 107 through a blowing-out gap (not shown) covering the whole width of the tunnel 106.
- the blowing-out gap is slightly directed towards the cold space 1 02.
- the solid arrows 108 indicate the general shape of the "separating plane" of the air curtain thus formed.
- the separating plane is that plane which separates the quantities of air flowing in and out near the floor.
- an embodiment which comprises means for adjusting said angular position of the air inlet gap, said means being controlled by detecting means responding to the air velocity, the direction of the wind and the ambient temperature.
- the air curtain has a considerably higher immunity to the effect of the wind than the air curtains hitherto employed.
- FIG. 2 A further improvement is obtained by the embodiment shown in fig. 2.
- elements corresponding with those of fig. 1 are designated by the same reference numerals.
- the difference from the cold store of fig. 1 consists in that the vertical tunnel walls 210 and 211 each have a profiled part 215 arid 216 respectively between the blowing gap and the outer end of the tunnel.
- These profiled parts 215 and 216 are constructed in this embodiment in the form of concave, depressed parts covering the whole height of the tunnel 206.
- the top wall 209 of the tunnel has a corresponding shape.
- Fig. 3 shows a cold-storage building 301 according to the invention, in which the tunnel 306 only extends to the outer side.
- the top wall 309 of the tunnel is provided with four suction/blowing units 318, 319, 320 and 321.
- the units 319 and 321 together generate an outer air curtain.
- the units 318 and 320 together generate an inner air curtain.
- Fig. 4 shows a front wall 403, broken away, of a cold-storage building (not shown in detail).
- a tunnel 406 extends towards both sides of the wall 403.
- One side wall 423 is provided with a suction/blowing unit 426 disposed in off-set manner in the direction of length of the tunnel for sucking in air from the ambience. With this disposition two relatively off-set air curtains directed in opposite senses can be generated in the tunnel 406.
- Figures 3 and 4 show to variants of the cold-storage building according to the invention, which have in common that two air inlet gaps relatively off-set in the direction of length of the tunnel and covering each the whole transverse dimension of the tunnel are provided on the tunnel wall.
- the gaps are provided in the same wall i.e. the ceiling 309.
- the gaps are provided in opposite walls, in this case the side walls 423 and 425.
- the angular position of the gap 531 is adjustable within given limits. Means for fixing the suction/blowing unit 527 in the selected angular position are not shown. The direction of the air stream is indicated by a few arrows.
- the top wall 609 of a tunnel 606 has a transverse gap 637.
- the side walls 610, 611 have, at the area of the gap 637, two cylindrically recessed parts 638 and 639 in a manner such that a cylinder 632 having annular recesses 640, 641 corresponding to the parts 638, 639 is held in sealing relationship by the edges of the gap 637 and the parts 638, 639.
- the cylinder 632 can be guarded against translation by brackets 642, 643 corresponding to the recesses 640, 641 and being fastened in line with the side walls above the top wall 609.
- the cylinder 632 is hollow and has a blowing-out gap 644 covering the whole length thereof.
- the cavity 645 of the cylinder 632 is closed on the sideof the side wall 611 and coupled on the other side with a flexible hose 646, which is connected with the blowing-out part of a suction/ blowing unit 647.
- Fig. 7 shows a variant of the invention having two air inlet gaps extending at least substantially in the transverse direction of the tunnel and covering each substantially the hol transverse dimension thereof, said gaps 748, 749 having the same axial positions in the tunnel on opposite walls.
- the air is blown through the gaps 748, 749 by two suction/blowing units 750 and 751 respectively.
- two opposite air streams together form an air curtain as is schematically indicated by arrows.
- Fig. 9 shows a further variant in which a chamber 7 having heat-insulating walls 13 is disposed on the top wall 1 of the tunnel 8.
- a blower 14 is arranged inside the chamber 7 and sucks in ambient air 16 to form an air curtain 17.
- a blower 15 sucks air from the cold space to form an air curtain 18. This embodiment also proves to yield excellent results.
- Fig. 10 illustrates a tunnel 19 of a cold store according to the invention comprising curtains 22, 23 suspended to rails 20, 2 1 formed by overlapping, flexible strips.
- the rails can be turned aside around a vertical pivotal shaft 24, 25.
- the lower edges 26, 27 of the curtains 22, 23 are located at a given distance from the tunnel floor 28. It is thus ensured that an effective operation of the air curtain is not hindered.
- the curtains ensure a substantially clear view and a free passage, whilst the influence of wind is reduced.
Abstract
The invention relates to a cold-storage building (101) having a cold space (102), a door opening (105) in at least one of the cold-store walls and means (107) for generating an air curtain intended for thermal separation at the area of the door opening (105) between the cold space (102) and the ambience, said cold-storage building (101) being characterized in accordance with the invention in that the door opening (105) is formed by a tunnel (106) extending over a predetermined distance, said means (107) being located in a zone between the ends of the tunnel.
Description
- The invention relates to a cold-storage building comprising a cold space, a door opening in at least one of the cold-store walls and means for producing an air curtain for thermal separation in the area of the door opening between the cold space and the ambience. The term "cold space" is to be understood to mean herein a cold space, for example, for storing frozen nutrients. The results so far obtained by air curtains have almost invariably been found to be disappointing in practice despite optimistic prognostications on theoretic bases.
- Several causes thereof may be put forward. It is, for example, difficult to dispose the means for producing an air curtain in a correct manner with respect to the door opening, as a result of which conditions in practice do not correspond to a theoretical model. A further, very important cause of the defective results is the high sensitivity of the known air curtain to wind, which may blow leaks in the air curtain. This may result in serious deterioration of the heat insulating properties of the air curtain.
- The invention has for its object to provide a cold storage building having an air curtain, the properties of which come up better to the theoretical prognostications so that in addition optimizing steps can be taken, for example, with regard to local conditions to be expected whilst the adverse effect of wind is strongly reduced.
- To this end the invention proposes a cold-storage building of the type set forth above in which the door opening is formed by a tunnel extending over a given distance and said means are located in a zone located between the ends of the tunnel. This tunnel operates as en enclosing or boundary corridor, which prevents the air from blowing out laterally.
- Preferably said means are formed by at least one air blowing gap extending substantially transversely of said tunnel and at least substantially across the whole transverse dimension thereof.
- Further features and particularities of the cold-storage building according to the invention will be mentioned and explained with reference to a drawing of a few embodiments to which the invention is, however, not limited. In the drawing show:
- Fig. 1 a perspective view partly broken away of part of a cold-storage building according to the invention, in which the tunnel extends only inside the cold space;
- Fig. 2 an elevational view corresponding with that of fig. 1 of a further embodiment of the invention;
- Fig. 3 a perspective view of part of a further embodiment of a cold-storage building according to the invention, in which the tunnel extends only outside the cold space;
- Fig. 4 a perspective view, partly broken away, of a wall of a further variant of a cold-storage building according to the invention, in which the tunnel extends both inside and outside the cold space;
- Fig. 5 a cross-sectional view of a suction/blowing unit, the angular position of which is adjustable;
- Fig. 6 a variant of the disposition shown in fig. 5;
- Fig. 7 a horizontal cross-sectional view of a cold-store wall having a tunnel in a different embodiment of a cold-storage building in accordance with the invention;
- Fig. 8 is a longitudinal sectional view of part of a sixth embodiment of the cold store in accordance with the invention;
- Fig. 9 is a longitundinal sectional view of part of a seventh embodiment of the cold store in accordance with the invention; and
- Fig. 10 is a perspective-wiew of part of the cold store with curtain strips joining the tunnel walls.
- Fig. 1 shows a cold-
storage building 101 according to the invention. The air in thecold space 102 bounded by thefront wall 103 and the further walls is cooled by acooling unit 104, which sucks in air, extracts heat therefrom and gives off the air thus cooled to the cold space. Arrows schematically indicate the way in which the air is sucked in and blown out. - The
front wall 103 has ahole 105 joining the ground, and communicating with atunnel 106 of rectangular cross- section extending in thecold space 102. At a distance from the ends of the tunnel 106 a suction/blowingunit 107 is arranged on the top wall 109 of the tunnel so that air is sucked in from thecold space 102 and is caused to leave theunit 107 through a blowing-out gap (not shown) covering the whole width of thetunnel 106. In the embodiment shown in fig. 1 the blowing-out gap is slightly directed towards the cold space 102. Thesolid arrows 108 indicate the general shape of the "separating plane" of the air curtain thus formed. The separating plane is that plane which separates the quantities of air flowing in and out near the floor.Arrows tunnel floor 114 towards thecold space 102. A further portion moves to the outside , so that in thecold space 102 the pressure is lower, which contributes to the shape of the air curtain shown schematically. - The
side walls - From the shape of the air curtain shown-in fig. 1 and particularly from this form near the blowing gap it appears that this gap, whose direction of length is substantially horizontal, is at such an angular position that the air blown out has a velocity component in the direction towards the
cold space 102. This angular position is preferably chosen so that the said separating plane of the .air curtain indicated by the solid central arrows near thetunnel floor 114 is at least substantially perpendicular to said tunnel floor. The shape of the air curtain and hence the place where the centre of the air curtain strikes thetunnel floor 114 depend, however, on various factors. Parameters that are (substantially) constant are, for example, the height of the cold space, the temperature in the cold space. Variable parameters are inter alia the ambient temperature, the direction of the wind and the wind velocity. Therefore, the optimum angular position of the blowing gap depends upon local conditions and influences of the ambience. For this reason the angular position of the air inlet gap is preferably adjustable, whilst its direction of length is maintained. Hereinafter it will be explained how this can be achieved with reference to figures 5 and 6. - With respect to the foregoing it is advantageous to use an embodiment which comprises means for adjusting said angular position of the air inlet gap, said means being controlled by detecting means responding to the air velocity, the direction of the wind and the ambient temperature.
- There may furthermore be provided means for controlling the initial velocity of the air of the air curtain, said means being controlled by detecting means responding to the velocity and the direction of the wind.
- Owing to the screening effect of the tunnel the air curtain has a considerably higher immunity to the effect of the wind than the air curtains hitherto employed.
- A further improvement is obtained by the embodiment shown in fig. 2. In this figure elements corresponding with those of fig. 1 are designated by the same reference numerals. The difference from the cold store of fig. 1 consists in that the
vertical tunnel walls 210 and 211 each have aprofiled part 215 arid 216 respectively between the blowing gap and the outer end of the tunnel. These profiledparts tunnel 206. Thetop wall 209 of the tunnel has a corresponding shape. -
Arrow 217 schematically indicates the direction of the wind. The curved end indicates that the incoming wind starts whirling so that its adverse effect is suppressed for the major part. - Fig. 3 shows a cold-
storage building 301 according to the invention, in which thetunnel 306 only extends to the outer side. Thetop wall 309 of the tunnel is provided with four suction/blowingunits units 319 and 321 together generate an outer air curtain. Theunits 318 and 320 together generate an inner air curtain. - The
tunnel 306 is broader than the conventional door openings. The thermal insulation achieved by the invention is so high that this widening does not give rise to problems of thermal loss. Ir this case one can pass in two separate directions, which enhances safety. For this purpose a line ofseparation 322 is made on thefloor 314. Theunits unit 107 of figs. 1 and 2. - Even with this widened
tunnel 306 it is sufficient to use a single air curtain. The thermal losses, though already low as compared with the conventional air curtains, may even be further reduced by using the second curtain. - Arrows indicate in fig. 3 the two air curtains.
- Fig. 4 shows a
front wall 403, broken away, of a cold-storage building (not shown in detail). Atunnel 406 extends towards both sides of thewall 403. One side wall 423 is provided with a suction/blowing unit 426 disposed in off-set manner in the direction of length of the tunnel for sucking in air from the ambience. With this disposition two relatively off-set air curtains directed in opposite senses can be generated in thetunnel 406. - Figures 3 and 4 show to variants of the cold-storage building according to the invention, which have in common that two air inlet gaps relatively off-set in the direction of length of the tunnel and covering each the whole transverse dimension of the tunnel are provided on the tunnel wall. In the embodiment of fig. 3 the gaps are provided in the same wall i.e. the
ceiling 309. In the embodiment of fig. 4 the gaps are provided in opposite walls, in this case theside walls 423 and 425. - Fig. 5 is a cross-sectional view of a suction/
blowing unit 527, the angular position of which is adjustable about a longitudinal axis. Theunit 527 is supported by atunnel wall 528 having an open gap formed by two walls formed by parts of a:cylindrical surface. Theblowing gap 531 is provided in acylinder 533 which is held vialongitudinal sealing elements 534 by thegap walls gap 531 extends substantially diametrically through the cylinder 532 and communicates by the opening remote from its free side with the blowing-out opening of anaxial fan 535, which is hermetically connected with the cylinder 532 in the manner shown in fig. 5. The air is sucked in through aninlet opening 536. From the configuration shown it will be apparent that the angular position of thegap 531 is adjustable within given limits. Means for fixing the suction/blowing unit 527 in the selected angular position are not shown. The direction of the air stream is indicated by a few arrows. - A further variant is shown in fig. 6. The
top wall 609 of atunnel 606 has atransverse gap 637. Theside walls gap 637, two cylindrically recessedparts cylinder 632 havingannular recesses parts gap 637 and theparts cylinder 632 can be guarded against translation bybrackets recesses top wall 609. Thecylinder 632 is hollow and has a blowing-outgap 644 covering the whole length thereof. Thecavity 645 of thecylinder 632 is closed on the sideof theside wall 611 and coupled on the other side with aflexible hose 646, which is connected with the blowing-out part of a suction/blowing unit 647. - The disposition shown in fig. 6 has the advantage that with a change of the angular position of the
gap 644 the mass centre of thecylirider 632 does not change in place, which is the case in the disposition of fig. 5. - The aforesaid means for automatic adjustment of the angular position of the
gaps - Fig. 7 shows a variant of the invention having two air inlet gaps extending at least substantially in the transverse direction of the tunnel and covering each substantially the hol transverse dimension thereof, said
gaps gaps units - The invention is not limited to the embodiments described andillustrated. For example, combinations of the various aspects of the invention discussed above are possible.
- Fig. 8 shows a variant in which the
top wall 1 of thetunnel 8 has superimposed on it a chamber 2 having thermally insulatingwalls 3. The chamber 2 comprises twoblowers 4, 5, which suck in air from the ambiance through the chamber 2 and anair suction gap 6 in thetop wall 1 of thetunnel 8 and which dispense theair 12 through blowinggaps air curtains 11, 12. Such a configuration has proved to be highly effective. - Fig. 9 shows a further variant in which a
chamber 7 having heat-insulatingwalls 13 is disposed on thetop wall 1 of thetunnel 8. Ablower 14 is arranged inside thechamber 7 and sucks inambient air 16 to form anair curtain 17. Ablower 15 sucks air from the cold space to form an air curtain 18. This embodiment also proves to yield excellent results. - Fig. 10 illustrates a
tunnel 19 of a cold store according to theinvention comprising curtains 22, 23 suspended torails 20, 21 formed by overlapping, flexible strips. The rails can be turned aside around a verticalpivotal shaft - The lower edges 26, 27 of the
curtains 22, 23 are located at a given distance from thetunnel floor 28. It is thus ensured that an effective operation of the air curtain is not hindered. The curtains ensure a substantially clear view and a free passage, whilst the influence of wind is reduced.
Claims (19)
1. A cold-storage building having a cold space, a door opening in at least one of the cold-store walls and means for generating an air curtain intended for thermal separation at the area of the door opening between the cold space and the ambience characterized in that the door opening is formed by a tunnel extending over a predetermined distance, said means being located in a zone between the ends of the tunnel.
2. A cold-storage building as claimed in claim 1, characterized in that said means comprise at least one air inlet gap extending substantially in the transverse direction of the tunnel and substantially covering the whole transverse dimension thereof.
3. A cold-storage building as claimed in claim I, characterized in that said means comprise two air blowing gaps extending at least substantially in the transverse direction of the tunnel and each substantially covering the whole transverse dimension concerned thereof, said gaps being relatively off-set in the direction of length of the tunnel.
4 A cold-storage building as claimed in claim 1, characterized in that said means comprise two air blowing gaps extending substantially in the transverse direction of the tunnel and each substantially covering the whole transverse dimension concerned thereof, said gaps being disposed in the same axial position of the tunnel on opposite walls thereof.
5. A cold-storage building as claimed in anyone of the preceding claims, characterized in that said tunnel extends in the cold space.
6. A cold-storage building as claimed in anyone of the preceding claims characterized in that said tunnel extends to the outer side.
7. A cold-storage building as claimed in anyone of the preceding claims, characterized by means for sucking in air from the cold space for obtaining the air curtain.
8. A cold-storage building as claimed in anyone of claims 1 to 6, characterized by means for sucking in air from the ambience for obtaining the air curtain.
9. A cold-storage building as claimed in anyone of claims 2 to 8,characterized in that the angular position of the or each air blowing gap is adjustable whilst maintaining its longitudinal direction.
10. A cold-storage building as claimed in claim 9, characterized by means for adjusting the angular position of said air blowing gap, said adjusting means being controlled by detecting means responding to the velocity and direction of the wind and to the ambient temperature.
11. A cold-storage building as claimed in anyone of the preceding claims, characterized by means for controlling the initial velocity of the air of the air curtain, said means being controlled by detecting means responding to the velocity and direction of the wind.
12. A cold-storage building as claimed in claim 1, characterized in that betweeen at least one air blowing gap and the outer end of the tunnel the side walls of the tunnel have a concave, cylindrical part extending substantially to the outer end of the tunnel and at least subtantially along their entire height.
13. A cold-storage building as claimed in claims 2 and 8, characterized in that the means for sucking in ambient air are formed by an air suction opening located in a zone located between the air blowing gap(s) and the outer end of the tunnel and in that a chamber is provided for establishing a communication between the air suction opening and the air blowing gap(s).
14. A cold-storage building as claimed in claims 5 and 13, characterized in that said chamber is thermally insulated.
15. A cold-storage building as claimed in claim 13 or 14, characterized in that the air-suction opening is formed by an air suction gap extending subtantially in the transverse direction of the tunnel and substantially along the whole transverse direction thereof.
16. A cold-storage building as claimed in claims 1 to 15, characterized in that near the outer end of the tunnel curtains formed by suspended strips having a small width as compared with the width of the tunnel join the two side walls of the tunnel in a substantially transverse direction thereto.
17. A cold-storage building as claimed in claim 16, characterized in that said strips are flexible.
18. A cold-storage building as claimed in claims 16 and/or 17, characterized in that the strips can be pivotally turned aside.
19. A cold-storage building as claimed in claims 16 to 18, characterized in that the lower edges of the curtains are located at a given distance from the tunnel floor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP81200229A EP0058782A1 (en) | 1981-02-24 | 1981-02-24 | Cold-storage building |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP81200229A EP0058782A1 (en) | 1981-02-24 | 1981-02-24 | Cold-storage building |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0058782A1 true EP0058782A1 (en) | 1982-09-01 |
Family
ID=8188109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81200229A Withdrawn EP0058782A1 (en) | 1981-02-24 | 1981-02-24 | Cold-storage building |
Country Status (1)
Country | Link |
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EP (1) | EP0058782A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0155924A2 (en) * | 1984-03-21 | 1985-09-25 | Ab Bahco Ventilation | Air curtaining unit |
FR2621887A1 (en) * | 1987-10-20 | 1989-04-21 | Sgn Soc Gen Tech Nouvelle | DYNAMIC CONFINEMENT AND CONTACT-FREE ACCOMMODATION |
EP1184633A1 (en) * | 2000-09-01 | 2002-03-06 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic tunnel for cooling products, in particular food products |
WO2006008471A1 (en) * | 2004-07-21 | 2006-01-26 | The Boc Group Plc | Ventilator |
JP2017215110A (en) * | 2016-06-01 | 2017-12-07 | 富士電機株式会社 | Air curtain device and refrigeration warehouse |
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US774730A (en) * | 1903-02-28 | 1904-11-08 | Theophilus Van Kannel | Means for excluding drafts from open doorways. |
US983877A (en) * | 1910-02-02 | 1911-02-14 | Henry H Cummings | Air-screen. |
US2827266A (en) * | 1956-10-31 | 1958-03-18 | V C Patterson & Associates Inc | Vestibule for cold storage warehouses |
US3023688A (en) * | 1958-05-16 | 1962-03-06 | Jr Fred A Kramer | Air barrier |
US3068775A (en) * | 1959-05-13 | 1962-12-18 | Sulzer Ag | Control system for an air curtain sealing the entrance of a building |
US3143952A (en) * | 1960-08-24 | 1964-08-11 | Dualjet Corp | Method and apparatus for conditioning gas |
US3157105A (en) * | 1961-08-01 | 1964-11-17 | Tamm Walter | Apparatus for producing an air curtain |
US3207056A (en) * | 1963-02-05 | 1965-09-21 | Dravo Corp | Apparatus for shielding door openings by means of air |
US3211078A (en) * | 1963-06-06 | 1965-10-12 | Gunnar C F Asker | Air curtain |
US3215058A (en) * | 1962-10-15 | 1965-11-02 | King Company | Air curtain apparatus |
US3308740A (en) * | 1965-01-15 | 1967-03-14 | Disco Eng Inc | Draft-free air curtain closure |
GB1155880A (en) * | 1966-12-08 | 1969-06-25 | Firth Cleveland Ltd | Improvements relating to Air Curtain Apparatus |
US3608468A (en) * | 1969-08-15 | 1971-09-28 | Cloise M Mcclurkin | Adjustable air-curtain system |
FR2171411A1 (en) * | 1972-02-11 | 1973-09-21 | Fordsmand Marc | |
DE2643299A1 (en) * | 1976-09-25 | 1978-03-30 | Wolfgang Mueller | Air conditioning air flow monitoring arrangement - uses sensors outside building to measure wind pressure, direction, speed and temp. |
DE2736837A1 (en) * | 1977-08-16 | 1979-03-01 | Wolfgang Mueller | Room air conditioning space dividing system - uses barriers of successive layers of air aimed in opposite directions |
-
1981
- 1981-02-24 EP EP81200229A patent/EP0058782A1/en not_active Withdrawn
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US774730A (en) * | 1903-02-28 | 1904-11-08 | Theophilus Van Kannel | Means for excluding drafts from open doorways. |
US983877A (en) * | 1910-02-02 | 1911-02-14 | Henry H Cummings | Air-screen. |
US2827266A (en) * | 1956-10-31 | 1958-03-18 | V C Patterson & Associates Inc | Vestibule for cold storage warehouses |
US3023688A (en) * | 1958-05-16 | 1962-03-06 | Jr Fred A Kramer | Air barrier |
US3068775A (en) * | 1959-05-13 | 1962-12-18 | Sulzer Ag | Control system for an air curtain sealing the entrance of a building |
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US3157105A (en) * | 1961-08-01 | 1964-11-17 | Tamm Walter | Apparatus for producing an air curtain |
US3215058A (en) * | 1962-10-15 | 1965-11-02 | King Company | Air curtain apparatus |
US3207056A (en) * | 1963-02-05 | 1965-09-21 | Dravo Corp | Apparatus for shielding door openings by means of air |
US3211078A (en) * | 1963-06-06 | 1965-10-12 | Gunnar C F Asker | Air curtain |
US3308740A (en) * | 1965-01-15 | 1967-03-14 | Disco Eng Inc | Draft-free air curtain closure |
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DE2736837A1 (en) * | 1977-08-16 | 1979-03-01 | Wolfgang Mueller | Room air conditioning space dividing system - uses barriers of successive layers of air aimed in opposite directions |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0155924A2 (en) * | 1984-03-21 | 1985-09-25 | Ab Bahco Ventilation | Air curtaining unit |
EP0155924A3 (en) * | 1984-03-21 | 1986-01-22 | Ab Bahco Ventilation | Air curtaining unit |
FR2621887A1 (en) * | 1987-10-20 | 1989-04-21 | Sgn Soc Gen Tech Nouvelle | DYNAMIC CONFINEMENT AND CONTACT-FREE ACCOMMODATION |
EP0313455A1 (en) * | 1987-10-20 | 1989-04-26 | SOCIETE GENERALE POUR LES TECHNIQUES NOUVELLES S.G.N. Société anonyme dite: | Space protected against exterior pollution |
EP1184633A1 (en) * | 2000-09-01 | 2002-03-06 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic tunnel for cooling products, in particular food products |
FR2813661A1 (en) * | 2000-09-01 | 2002-03-08 | Air Liquide | CRYOGENIC TUNNEL FOR THE REFRIGERATION OF PRODUCTS, ESPECIALLY FOOD |
US6553781B2 (en) | 2000-09-01 | 2003-04-29 | L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic tunnel for chilling products, especially food products |
WO2006008471A1 (en) * | 2004-07-21 | 2006-01-26 | The Boc Group Plc | Ventilator |
JP2017215110A (en) * | 2016-06-01 | 2017-12-07 | 富士電機株式会社 | Air curtain device and refrigeration warehouse |
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