US20050235687A1 - Fan for a food freezer - Google Patents
Fan for a food freezer Download PDFInfo
- Publication number
- US20050235687A1 US20050235687A1 US11/110,768 US11076805A US2005235687A1 US 20050235687 A1 US20050235687 A1 US 20050235687A1 US 11076805 A US11076805 A US 11076805A US 2005235687 A1 US2005235687 A1 US 2005235687A1
- Authority
- US
- United States
- Prior art keywords
- fan
- stainless steel
- steel plates
- hub
- blades
- 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.)
- Abandoned
Links
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 37
- 239000010935 stainless steel Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002925 chemical effect Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/329—Details of the hub
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/17—Alloys
- F05D2300/171—Steel alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
Definitions
- This invention relates to a fan for circulating cold gas in a food freezer, wherein the fan has blades mounted on a hub.
- a wide variety of equipment in which the foodstuffs are exposed to a cold gas atmosphere e.g., a nitrogen gas atmosphere
- the cold gas atmosphere may be created, for example, by evaporating a liquefied gas, e.g., liquid nitrogen.
- a liquefied gas e.g., liquid nitrogen.
- fans are provided for the required cold gas circulation.
- the freezer we speak of chest freezers, tunnel freezers or spiral belt freezers. With the very popular tunnel freezers, the foodstuffs are placed on a conveyor belt, for example, that conveys the foodstuffs through a tunnel-like housing.
- a cold gas atmosphere is maintained in the tunnel-like housing, usually with multiple fans providing the required cold gas circulation.
- the fans used are very often of the type in which the blades of the fan are made of plastic and the hub of the fan is made of aluminum.
- use of aluminum is problematical in the food area for hygiene reasons, due to corrosion and in particular due to cleaning agents.
- solid hubs made of stainless steel are very expensive and are complex to manufacture. The die-casting molds used to produce them have very short lifetimes.
- the object of the present invention is to make available a fan for cold gas circulation in a food freezer which will at the same time meet high demands regarding hygiene and will have a high efficiency.
- the hub is made of two sheets of stainless steel with the fan blades situated between them.
- the stainless steel plates are expediently designed as circular disks. Near the circumference of the circle, each disk has boreholes for fastening the fan blades. Alternatively, these stainless steel plates may also be designed as pentagonal, hexagonal or octagonal disks.
- the fan blades are arranged in a sandwich construction between the two disks.
- the stainless steel plates have cutouts which prevent food particles from accumulating. In addition, this facilitates cleaning on all sides inside and outside of the fan wheel.
- the cutouts may be designed in a variety of ways.
- the stainless steel plates are preferably manufactured by laser technology. In contrast with manufacturing solid stainless steel hubs, stainless steel plates may also be manufactured inexpensively by the laser technique. Alternatively, the stainless steel plates may also be milled.
- the fan blades are advantageously made of plastic. However, they may also be made of stainless steel.
- the fan blades have an aerodynamically optimized profile (helicopter rotor).
- the inventive fan may be used for all conceivable food freezers in which high demands of hygiene and efficiency are made.
- the fan is suitable for chest freezers, tunnel freezers and spiral belt freezers.
- the inventive fan is optimally suitable for use in food technology. Since corrosive materials are not used, the possibility of a chemical effect on the foodstuffs can be ruled out. Furthermore, due to the inventive design of the fan, dead space is minimized. Contamination of the foodstuffs due to adhering impurities can be reliably prevented. Finally, the fan can be manufactured by an inexpensive laser method.
- FIG. 1 shows two stainless steel plates in accordance with an embodiment of the present invention in a view from above.
- FIG. 2 shows a perspective diagram of a complete fan in accordance with an embodiment of the present invention.
- FIG. 1 shows two stainless steel plates in the form of disks with an identical design so that when assembled they form the hub of the fan.
- the two stainless steel plates are placed concentrically one above the other, with the opening 5 for the ventilator shaft and the boreholes 2 , 3 to receive the fasteners for the fan blades are each situated above one another.
- the mass of the stainless steel plates is reduced and the accessibility for cleaning purposes is increased due to these recesses 4 .
- FIG. 2 shows on the left side a completely assembled fan in a perspective diagram as seen from above while it is shown from beneath on the right side. At the center can be seen a detailed view of the hub with stainless steel plates 1 and 2 and the fan blades 8 mounted thereon.
- the complete fan has a motor 6 which drives the hub which is composed of the stainless steel plates 1 and 2 , via a shaft 7 .
- the fan blades 8 are each inserted at one end into the intermediate space formed by the stainless steel plates 1 and 2 and fastened there to the stainless steel plates 1 and 2 by means of bolts or screws, for example.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004020178.1 | 2004-04-22 | ||
DE102004020178A DE102004020178A1 (de) | 2004-04-22 | 2004-04-22 | Ventilator für einen Lebensmittelfroster |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050235687A1 true US20050235687A1 (en) | 2005-10-27 |
Family
ID=34935194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/110,768 Abandoned US20050235687A1 (en) | 2004-04-22 | 2005-04-21 | Fan for a food freezer |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050235687A1 (fr) |
EP (1) | EP1589230A1 (fr) |
AR (1) | AR048870A1 (fr) |
BR (1) | BRPI0501364A (fr) |
DE (1) | DE102004020178A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101886638A (zh) * | 2010-05-07 | 2010-11-17 | 许晓华 | 一种风扇叶片与转轴连接结构 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2631580A1 (fr) * | 2012-02-22 | 2013-08-28 | Bühler AG | Séchage d'aliments, notamment de produits à base de pâtes, doté d'un battant de ventilateur comprenant une matière plastique |
CN106264136B (zh) * | 2016-08-20 | 2018-12-14 | 绍兴明煌科技有限公司 | 一种多功能豆浆机 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1611547A (en) * | 1925-01-31 | 1926-12-21 | Allen O Miller | Hub for fan blowers |
US2573875A (en) * | 1945-02-14 | 1951-11-06 | Airscrew Company Ltd | Rotary fan |
US4040769A (en) * | 1976-02-20 | 1977-08-09 | Britz Robert N | Fan wheel |
US4077226A (en) * | 1976-07-06 | 1978-03-07 | Restaurant Technology, Inc. | Cryogenic freezer |
US4295789A (en) * | 1979-08-09 | 1981-10-20 | Robinson Industries, Inc. | Cover plates for tank heads |
US4321013A (en) * | 1979-04-25 | 1982-03-23 | Messerschmitt-Bolkow-Blohm Gesellschaft Mit Beschrankter Haftung | Headpiece support for rotor of a rotary wing aircraft |
US4957414A (en) * | 1988-12-29 | 1990-09-18 | Flex-A-Lite Consolidated | Fan and hub assembly |
US6250886B1 (en) * | 1999-09-03 | 2001-06-26 | Chittom International, Inc. | Axial flow fan and fan blade |
US6427455B1 (en) * | 1998-03-19 | 2002-08-06 | Light Shoki Kabushiki Kaisha | Cooling device and its cooling method |
US6800956B2 (en) * | 2002-01-30 | 2004-10-05 | Lexington Bartlett | Wind power system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE757014A (fr) * | 1969-10-04 | 1971-03-16 | Schloz Motor Condensator |
-
2004
- 2004-04-22 DE DE102004020178A patent/DE102004020178A1/de not_active Withdrawn
-
2005
- 2005-04-14 EP EP05008210A patent/EP1589230A1/fr not_active Withdrawn
- 2005-04-19 AR ARP050101537A patent/AR048870A1/es unknown
- 2005-04-20 BR BR0501364-0A patent/BRPI0501364A/pt not_active IP Right Cessation
- 2005-04-21 US US11/110,768 patent/US20050235687A1/en not_active Abandoned
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1611547A (en) * | 1925-01-31 | 1926-12-21 | Allen O Miller | Hub for fan blowers |
US2573875A (en) * | 1945-02-14 | 1951-11-06 | Airscrew Company Ltd | Rotary fan |
US4040769A (en) * | 1976-02-20 | 1977-08-09 | Britz Robert N | Fan wheel |
US4077226A (en) * | 1976-07-06 | 1978-03-07 | Restaurant Technology, Inc. | Cryogenic freezer |
US4321013A (en) * | 1979-04-25 | 1982-03-23 | Messerschmitt-Bolkow-Blohm Gesellschaft Mit Beschrankter Haftung | Headpiece support for rotor of a rotary wing aircraft |
US4295789A (en) * | 1979-08-09 | 1981-10-20 | Robinson Industries, Inc. | Cover plates for tank heads |
US4957414A (en) * | 1988-12-29 | 1990-09-18 | Flex-A-Lite Consolidated | Fan and hub assembly |
US6427455B1 (en) * | 1998-03-19 | 2002-08-06 | Light Shoki Kabushiki Kaisha | Cooling device and its cooling method |
US6250886B1 (en) * | 1999-09-03 | 2001-06-26 | Chittom International, Inc. | Axial flow fan and fan blade |
US6800956B2 (en) * | 2002-01-30 | 2004-10-05 | Lexington Bartlett | Wind power system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101886638A (zh) * | 2010-05-07 | 2010-11-17 | 许晓华 | 一种风扇叶片与转轴连接结构 |
Also Published As
Publication number | Publication date |
---|---|
DE102004020178A1 (de) | 2005-11-17 |
BRPI0501364A (pt) | 2005-12-06 |
AR048870A1 (es) | 2006-06-07 |
EP1589230A1 (fr) | 2005-10-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LINDE AKTIENGESELLSCHAFT, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JAGAEUS, ULF;REEL/FRAME:016737/0557 Effective date: 20050531 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |