EP0355745A2 - Dispositif de fabrication de grains de glace - Google Patents

Dispositif de fabrication de grains de glace Download PDF

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Publication number
EP0355745A2
EP0355745A2 EP89115293A EP89115293A EP0355745A2 EP 0355745 A2 EP0355745 A2 EP 0355745A2 EP 89115293 A EP89115293 A EP 89115293A EP 89115293 A EP89115293 A EP 89115293A EP 0355745 A2 EP0355745 A2 EP 0355745A2
Authority
EP
European Patent Office
Prior art keywords
cooling surface
ice
drop generator
drive
drop
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.)
Granted
Application number
EP89115293A
Other languages
German (de)
English (en)
Other versions
EP0355745B1 (fr
EP0355745A3 (fr
Inventor
Ernst Manfred Küntzel
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.)
Ernst Manfred Kuentzel Malereibetrieb GmbH
Original Assignee
Ernst Manfred Kuentzel Malereibetrieb GmbH
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 Ernst Manfred Kuentzel Malereibetrieb GmbH filed Critical Ernst Manfred Kuentzel Malereibetrieb GmbH
Priority to AT89115293T priority Critical patent/ATE100567T1/de
Publication of EP0355745A2 publication Critical patent/EP0355745A2/fr
Publication of EP0355745A3 publication Critical patent/EP0355745A3/fr
Application granted granted Critical
Publication of EP0355745B1 publication Critical patent/EP0355745B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F25C1/12—Producing ice by freezing water on cooled surfaces, e.g. to form slabs
    • F25C1/14—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes
    • F25C1/142—Producing ice by freezing water on cooled surfaces, e.g. to form slabs to form thin sheets which are removed by scraping or wedging, e.g. in the form of flakes from the outer walls of cooled bodies

Definitions

  • the invention relates to a device for producing ice grains, in particular for use in jet cleaning devices, with a liquid supply device, at least one support with a cooling surface on which the liquid supplied by the liquid supply device solidifies to ice, and an ice detaching device for Remove the ice from the cooling surface.
  • GB-PS 13 97 102 discloses a jet cleaning device with an apparatus for producing ice grains, which without any description is simply referred to as an ice crushing unit and is shown schematically in the drawing. Ice crushing units of the type mentioned are described several times in the prior art, for example in US Pat. No. 2,735,275, DE-OS 32 46 724, DE-OS 24 42 365 and DE-OS 28 01 565.
  • the ice crushing units according to these documents use, in the order of their enumeration, as a carrier with a cooling surface, the inner wall of a vertically arranged hollow cylinder, the outer surface of a horizontal drum, the parallel surfaces of a vertically arranged disc or the surface of a horizontally arranged disc.
  • ice crushing units have in common that the liquid is supplied to the cooling surfaces in such a way that it solidifies on them to form an uninterrupted layer of ice.
  • the ice layer is crushed and cooled area away.
  • the ice crushing unit according to US Pat. No. 2,735,275 uses a series of knives which are moved in horizontal paths along the inner wall of the hollow cylinder. These knives are arranged parallel to each other with certain mutual distances and a certain stretching position in relation to their path of movement and a certain depth of penetration into the ice layer in order to break up the ice layer.
  • the knife spacing, the inclination of the knives and their depth of penetration into the ice layer are extremely critical.
  • the ice is pulverized, while if the inclination is too small, it will not allow sufficient ice removal. In the latter case, an ever thicker layer of ice can build up, the removal of which is then no longer possible.
  • the known ice crushing units are not suitable, despite the maintenance and design effort, particularly with regard to the cutting devices, to produce ice grains with the dimensional accuracy required for blasting.
  • Another disadvantage is that the ice grains have to be broken out of the uninterrupted layer of ice. The amounts of energy required for this cause the surface of the ice grains to melt at their dividing surfaces. The resulting layers of liquid cool down soon afterwards and are transferred to the solid state, again connecting the individual ice grains with one another. This creates conglomerates of different sizes from individual ice grains.
  • the liquid supply device is designed as a droplet generator, that the cooling surface is arranged in a substantially horizontal plane at a distance below the droplet generator, and that the ice-removing device has a wiping edge that is parallel to the cooling surface and essentially lies on top of it for stripping the drops of ice formed on the cooling surface.
  • the droplet generator is used to form droplets of a certain size that must be observed precisely at precisely defined distances from one another. These drops are then transferred to the cooling surface, where they solidify into ice drops without changing their size and their mutual spacing. It is then only necessary to remove these ice drops from the cooling surface by means of the scraper edge. It is only necessary to overcome the very low adhesion of the ice drops to the cooling surface with the supply of correspondingly small amounts of energy, so that there is no longer any surface melting of the ice drops and these can consequently be removed from the device as separate ice drops.
  • the drop former is preferably designed as an essentially horizontal perforated plate with a plurality of through holes.
  • the cooling surface carrier can be designed as an essentially circular carrier disc, the surface of which represents the cooling surface.
  • the droplet generator In order to achieve continuous operation of the device, it is favorable to design the droplet generator so that it has an elongated shape which is essentially radial to the cooling surface carrier, and to move the cooling surface carrier and droplet generator relative to one another in their respective planes by means of a drive device.
  • the wiping edge can be arranged at a distance from the drop generator.
  • the wiping edge is preferably arranged essentially radially to the cooling surface support with a length substantially corresponding to its radius.
  • the removal of the ice drops is particularly simple if a collecting funnel for the stripped ice drops is arranged in the edge region of the cooling surface support in a plane below it.
  • the drop generator is arranged in the form of a circular section concentrically with the cooling surface support and with approximately the same radius.
  • the circular section can enclose an angle of approximately 30 °.
  • the droplet generator is preferably held stationary on a frame of the device and the cooling surface support is fastened to a central axis rotatably mounted in the frame and coupled to the drive device.
  • the scraper edge can be arranged stationary.
  • the scraper edge In order to ensure that the liquid drops solidify into solid ice drops when the scraper edge is reached, it is expedient to arrange the scraper edge in the direction of rotation of the cooling surface support at an angular distance of approximately 330 ° from the drop generator.
  • the wiping edge advantageously runs convexly in the direction of rotation of the cooling surface carrier. Due to this convex course, the scraper edge forces the ice drops onto the edge of the rotating cooling surface support, where they can fall down and be collected in the collecting funnel.
  • the scraper edge is preferably formed on a scraper bar supported on the central axis.
  • the scraper bar can be supported in the edge region of the cooling surface support on a support device attached to the frame. It is expedient to mount a support roller for supporting the cooling surface support in the support device.
  • the drop generator is advantageously supported on a secondary axis held in the frame edge outside the cooling surface support and on the central axis.
  • the frame can comprise a base plate in a plane below the cooling surface support and a top plate in a plane above the drop generator.
  • a plurality of arrangements each consisting of a drop former, a cooling surface support and a wiping edge, are arranged between the top plate and the base plate.
  • the drop generator is preferably connected to a liquid supply via a hose system.
  • the hose system can comprise a plurality of connection hoses which are connected to the drop generator in a substantially uniform distribution.
  • connection tube can be connected to each hole of the drop generator.
  • the inside diameter of each connecting hose is advantageously 0.5 mm.
  • the drop generator is designed as a housing with a removable cover.
  • the connecting hoses can be inserted through the cover into the holes.
  • the liquid supply is preferably connected to the connecting hoses via a branching distribution system that gradually becomes finer in the direction of the drop former.
  • a metering liquid pump can be arranged between the liquid supply and the distribution system.
  • the base plate and the top plate are advantageously connected to one another by an annular wall to form an essentially closed space.
  • this closed space is designed as a cooling space.
  • the cooling surface support can be made of aluminum.
  • the drive device is designed to rotate the cooling surface carrier in cycles.
  • the droplets are transferred from the droplet generator to the cooling surface carrier when the latter is stationary, so that the shape, size and mutual spacing of the droplets on the cooling surface carrier are essentially the same as on the droplet generator.
  • the drive device preferably comprises a toothing on the central axis and a slide roller which is arranged eccentrically on a drive axis of a motor / gear unit and which engages in the toothing.
  • the teeth can be formed on an essentially horizontal drive disk attached to the central axis.
  • the drive pulley can be attached to the upper free end of the central axis and the motor / gear unit to the head plate.
  • the teeth preferably comprise 12 pins. Such perforation is matched to a droplet generator with a circular section of 30 °.
  • the droplet generator can be moved up and down in the drive cycle in such a way that it assumes the bottom dead center position when the cooling surface support is at a standstill.
  • the drops are thus transferred directly from the drop generator to the cooling surface carrier, ie during the transfer the drops are in contact with the cooling surface carrier and the drop generator and only detach from the latter after the latter has been lifted.
  • the droplets do not detach from the droplet former and then fall down until they hit the cooling surface support. The risk of tearing the drops when hitting the cooling surface carrier is thus prevented.
  • the distance of the drop generator from the cooling surface support can be approximately 1 mm.
  • the secondary axis is guided up and down in the frame and connected at its upper end to the arm of a two-armed lever, the other arm of which can be moved up and down by a cam arranged eccentrically on the drive axis.
  • the jet cleaning device shown in FIG. 1 comprises the device 1 according to the invention for producing ice grains, which is connected on the one hand to a water supply 4 via a hose system 2 and a distribution system 3 and on the other hand to a jet nozzle 6 via a transport hose 5.
  • the compressed air required for blasting is generated by means of a compressor 7 and fed to the transport hose 5 via a line 8.
  • the water reservoir 4 can be an open or closed water reservoir, which is followed by a metering liquid pump 9.
  • the device 1 comprises a frame consisting of a horizontal base plate 10 and a horizontal top plate 11 arranged at a distance above the same. Both plates 10, 11 are connected to one another by an annular wall indicated in FIG. 2 by 12 to form an essentially closed cooling space 13.
  • a vertical central axis 14 is immovable in the vertical direction, but rotatably mounted in the plates 10, 11. At a distance from the central axis 14 is ei ne minor axis 15 also slidably guided in the plates 10, 11 in the vertical direction.
  • the droplet generator 17 of each arrangement 16 is arranged in a horizontal plane at a distance above the cooling surface carrier 18, parallel to the latter.
  • the cooling surface support 18 is made of aluminum. Its surface 20 facing the droplet generator 17 represents a cooling surface.
  • the stripping bar 19 has a stripping edge 21 which runs parallel to the cooling surface 20 and rests thereon.
  • the cooling surface carrier 18 is designed as a circular carrier disk which is fastened to the central axis 14 and is rotatable therewith.
  • the central axis 14 is coupled to a drive device 22 to be described.
  • the radius of the cooling surface carrier 18 is somewhat smaller than the distance between the central axis 14 and the secondary axis 15.
  • the stripping bar 19 is arranged radially to the cooling surface carrier 18. Its trailing side with respect to the direction of rotation F of the cooling surface support 18, including the scraper edge 21, has a convex shape.
  • the plastic scraper bar 19 is attached at one end to the central axis 14 and at its other end to a pin 23 of a support device 24, which is arranged in the edge region of the cooling surface carrier 18 below it and carries a support roller 25, which serves the cooling surface carrier 18 so that it remains in its horizontal plane and in this way the stripping edge 21 rests over its entire length of the cooling surface 20.
  • the support device 24 is fastened to the base plate 10.
  • a collecting funnel 26 is arranged below and in the edge area of the cooling surface support 18, which leads to the transport hose 5 via a conveying device 27.
  • the droplet generator 17 is designed as a perforated plate with a plurality of through holes 28 schematically shown in FIGS. 2 and 3.
  • the droplet generator 17 has the shape of a circular section, which includes an angle of 30 ° and is fixed in a rotationally fixed manner to the secondary axis 15, with which it can be moved up and down, and is supported on the central axis 14.
  • the droplet generator 17 is attached to the secondary axis 15 via an edge section 29, which shifts the droplet generator 17 radially (outwards) and axially (in the direction of the head plate 11) to the secondary axis 15 outside the area covering the cooling surface support 18.
  • the edge section 29 continues along the remaining sides of the drop generator 17 to form an uninterrupted peripheral edge.
  • a lid 30 is removably placed on this edge, so that the drop generator 17 is designed as a housing as a whole.
  • the stripping bar 19 is arranged in the direction of rotation F of the cooling surface carrier 18 at an angular distance of approximately 330 ° from the drop generator 17.
  • the drop generator 17 is connected to the distribution system 3 via the hose system 2.
  • the hose system 2 comprises a connection, not shown hoses, the number of which is equal to the number of bores 28.
  • Each connecting hose is passed through the cover 30 and inserted into the corresponding through hole 28.
  • the inside diameter of each connecting hose is 0.5 mm.
  • the connecting hoses are bundled in the hose system 2 up to the distribution system 3.
  • the distribution system 3 is designed as a branching distribution system that gradually becomes finer from the water supply 4 in the direction of the hose system 2, so that ultimately the finest gradation of the distribution system 3 via the respective connection hose into the plastic one Drop generator 17 is initiated.
  • the drive device 22 for driving the central axis 14 and thus the cooling surface carrier 18 comprises a motor / gear unit 31, an eccentric 32 and a toothing 33.
  • the latter is designed in the form of twelve vertical pins which are formed with the same mutual distances in the edge region of a horizontal drive disk 34 are.
  • the drive pulley 34 is fastened to the free end of the central axis 15 which projects beyond the head plate 11.
  • the motor / gear unit 31 fastened to the head plate 11 has a drive axle 35 which carries the eccentric 32 in the form of a sliding roller at its free end.
  • the dimensions of the sliding roller 32 and its eccentric arrangement are so matched to the pins 33 and their mutual distances that they rotate the drive disk 34 in cycles when the drive shaft 35 rotates. In other words, the cooling surface support 18 is stopped twelve times for a certain period of time during one revolution.
  • the drop generator 17 is moved up and down in time with the intermittent rotation of the cooling surface carrier 18 by corresponding lifting movements of the secondary axis 15.
  • a two-armed lever 36 is mounted on a support block 38 attached to the head plate 11 at 37.
  • This two-armed lever 36 is fastened with an arm 39 via a pivot connection with a pin 40 to the free end of the secondary axis 15 protruding beyond the head plate 11.
  • an eccentrically fastened cam 42 engages on the drive axis 35 in such a way that when the drive axis 35 rotates, the two-armed lever 36 moves the secondary axis 15 and thus the droplet generator 17 up and down.
  • a spring 46 fastened to the head plate 11 keeps the arm 41 of the two-armed lever 36 constantly in contact with the drive axle 35 or the cam 42.
  • the cam 42 is arranged in front of the eccentric 32 by 90 ° in the direction of rotation D of the drive axle 35. This ensures that when the eccentric 32 and the corresponding pin 33 come out of engagement and thus the cooling surface support 18 is stopped, the cam 42 has reached the apex of its movement path and thus the drop generator 17 via the two-armed lever 36 and the secondary axis 15 has reached the bottom dead center of its lifting movement.
  • the eccentric arrangement of the cam 42 is selected so that in the bottom dead center position the distance of the drop generator 17 from the cooling surface support 18 is approximately 1 mm.
  • the conveyor 27 consists of a precision tube 43, in which an impeller 44 is arranged.
  • the impeller 44 can be driven rotatably by means of a drive (not shown) and has a plurality of vanes which are adapted to the inner wall of the precision tube 43 with great accuracy.
  • the latter is about one Opening in its upper side with the collecting funnel 26 and with an opening in its lower side with a chamber 45 connected to the line 8 and the transport hose 5.
  • the function of the device for producing ice grains according to the invention is as follows:
  • metered quantities of water, which are freed of impurities by a filter upstream of the pump 9, are taken from the water supply 4 and, via the distribution system 3, the individual connecting hoses of the hose system 2 in ever finer graded quantities and via these the individual through holes 28 in the drop generator 17 fed.
  • the water drops which form on the underside of the drop former at each through hole 28 are transferred directly to the cooling surface 20 when the cooling surface carrier 18 is stationary.
  • the droplet generator 17 is arranged at a distance of 1 mm above the cooling surface 20, so that the water drops, not shown, adhere to both the droplet generator 17 and the cooling surface 20 at the same time.
  • the water drops are released from the drop former 17 by lifting them and remain unchanged in terms of their size and mutual distances on the cooling surface 20.
  • the cooling surface carrier 18 is rotated intermittently, ie interrupted by downtimes, by means of the drive device 22 in the direction of rotation F.
  • the cooling surface support 18 is made of heat-conducting aluminum - to ice drops that occur when the scraper is reached beams 19 are detached from the cooling surface 20 by the stripping edge 21 and are pushed to the edge of the cooling surface carrier 18 as a result of the convex design of the stripping beam 19. From there they fall into the collecting funnel 26, arrive as individual ice drops (maximum size 4 mm) in the conveying device 27, from which they are transported by means of the impeller 44 into the chamber 45 and from there by means of the compressor 7 via the line 8 Compressed air (about 10 bar) are conveyed through the transport hose 5 to the jet nozzle 6, from which they emerge at high speed.
  • the pin 33 is displaced in the direction of rotation D by the eccentric 32 rotating with the rotating drive axis 35, as a result of which the drive disk 34 is rotated in the direction of rotation F and thus via the central axis 14 of the cooling surface carriers 18 in the direction of rotation F.
  • the cam 42 and the arm 41 are still disengaged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Confectionery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Cereal-Derived Products (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Cleaning In General (AREA)
EP89115293A 1988-08-23 1989-08-18 Dispositif de fabrication de grains de glace Expired - Lifetime EP0355745B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89115293T ATE100567T1 (de) 1988-08-23 1989-08-18 Vorrichtung zum herstellen von eiskoernern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8810665U DE8810665U1 (de) 1988-08-23 1988-08-23 Vorrichtung zum Herstellen von Eiskörnern
DE8810665U 1988-08-23

Publications (3)

Publication Number Publication Date
EP0355745A2 true EP0355745A2 (fr) 1990-02-28
EP0355745A3 EP0355745A3 (fr) 1991-05-22
EP0355745B1 EP0355745B1 (fr) 1994-01-19

Family

ID=6827173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115293A Expired - Lifetime EP0355745B1 (fr) 1988-08-23 1989-08-18 Dispositif de fabrication de grains de glace

Country Status (4)

Country Link
EP (1) EP0355745B1 (fr)
AT (1) ATE100567T1 (fr)
DE (2) DE8810665U1 (fr)
ES (1) ES2048797T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998006988A1 (fr) * 1996-08-09 1998-02-19 Snow Fun Factory Pty. Ltd. Procede et dispositif pour fabriquer de la neige

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9401295U1 (de) * 1994-01-26 1994-09-29 Ernst Manfred Küntzel GmbH Malereibetrieb, 80689 München Vorrichtung zur Herstellung von Eiskörnern
DE19653351B4 (de) * 1996-12-20 2005-06-02 Maja-Maschinenfabrik Hermann Schill Gmbh Scherbeneisautomat

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2228998A (en) * 1938-07-25 1941-01-14 Mechanical Res Inc Refrigerating apparatus
DE2442365A1 (de) * 1974-09-04 1976-03-18 Allan Joseph Treuer Maschine zur kontinuierlichen produktion von flockeneis aus einer gefrierbaren fluessigkeit
GB2095538A (en) * 1981-03-27 1982-10-06 Brinkman Robertus Hermanus Nic Method and apparatus for peeling vegetables such as potatoes
DK550884A (da) * 1984-11-20 1986-05-21 Knud Erik Westergaard Fremgangsmaade og apparat til partikelblaesning med partikler af et materiale, der skifter tilstandsform
US4704873A (en) * 1985-11-14 1987-11-10 Taiyo Sanso Co., Ltd. Method and apparatus for producing microfine frozen particles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998006988A1 (fr) * 1996-08-09 1998-02-19 Snow Fun Factory Pty. Ltd. Procede et dispositif pour fabriquer de la neige

Also Published As

Publication number Publication date
EP0355745B1 (fr) 1994-01-19
DE8810665U1 (de) 1988-12-01
DE58906744D1 (de) 1994-03-03
EP0355745A3 (fr) 1991-05-22
ES2048797T3 (es) 1994-04-01
ATE100567T1 (de) 1994-02-15

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