EP0132793B1 - Querstromlüfter - Google Patents

Querstromlüfter Download PDF

Info

Publication number
EP0132793B1
EP0132793B1 EP84108520A EP84108520A EP0132793B1 EP 0132793 B1 EP0132793 B1 EP 0132793B1 EP 84108520 A EP84108520 A EP 84108520A EP 84108520 A EP84108520 A EP 84108520A EP 0132793 B1 EP0132793 B1 EP 0132793B1
Authority
EP
European Patent Office
Prior art keywords
rotor
angle
point
tangential blower
cross
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
Application number
EP84108520A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0132793A1 (de
Inventor
Reinhold Hopfensperger
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.)
Alcatel Lucent NV
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
International Standard Electric Corp
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 Alcatel SEL AG, Standard Elektrik Lorenz AG, International Standard Electric Corp filed Critical Alcatel SEL AG
Publication of EP0132793A1 publication Critical patent/EP0132793A1/de
Application granted granted Critical
Publication of EP0132793B1 publication Critical patent/EP0132793B1/de
Expired legal-status Critical Current

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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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type

Definitions

  • the invention relates to a cross-flow fan designed as a small or small fan, consisting of a fan roller with blade edges running parallel to the axis of rotation, a baffle plate partially encompassing the fan roller, a one-part or multi-part vortex former and side parts enclosing the fan roller ends completely or partially.
  • a cross-flow fan is known from US-A-3,275,224, which contains the components listed in the preamble of the claim.
  • the guide plate and vortex generator have a shape that is not identical to the solution according to the invention.
  • Cross-flow fans whose fan roller has a diameter of, for example, 40 mm are referred to as small or very small fans.
  • Such cross-flow fans are known as mass products and are used in large numbers, for example, in household appliances, fan heaters, air conditioners, convectors, copiers, projectors, plug-in units for electrical and electronic devices and the like. The wide range of applications also shows that such fans have proven themselves in practice.
  • the invention relates in particular to cross-flow fans with a flat flow, which should not exceed certain external dimensions.
  • the maximum external dimensions are, for example, 60x60 mm.
  • Such cross-flow fans are required because of the increasingly compact design of the devices listed above, such as copy devices.
  • Fan rollers with such a small diameter naturally work at low Re numbers (Reynolds numbers), which characterize a certain flow state.
  • the invention is therefore based on the object of providing a cross-flow fan designed as a small or very small fan, in particular a cross-flow fan with a flat through-flow, which preferably delivers a high volume flow in free jet operation or with low throttling and at the same time the noise development is very low.
  • Figures 1 and 2 illustrate the difference between a cross-flow fan with a flat (0 ° -) flow (Fig. 1) and one with a right-angled (90 ° -) flow.
  • a cross-flow fan with a flat flow suction direction 7 and Blow-out direction 8 on a straight line.
  • the suction direction 7 and blow-out direction 8 are approximately at right angles to one another.
  • One could speak of a mixed flow if the suction and discharge directions are approximately at an angle of 45 ° to each other.
  • FIG. 3 shows the configuration of a known cross-flow fan of the category according to the application, as it is sold by Toshiba.
  • This known cross-flow fan has external dimensions of approximately 60x65 mm, as can be seen on the side part 9.
  • the guide plate 1 runs on the suction side almost at a constant distance from the fan roller 3, while the pressure-side part of the guide plate 1 ends as a straight line.
  • the vortex generator 5 is practically formed in two parts in the known cross-flow fan, one part being designed as a straight line at an almost constant distance from the fan roller circumference and the other part running as a straight line to the edge of the housing.
  • FIG. 4 shows the configuration of the cross-flow fan according to the invention, the external dimensions of which are somewhat smaller than that of the known cross-flow fan, and are approximately 60 ⁇ 60 mm.
  • the baffle 1 is formed like a shell and has the point of greatest proximity to the fan roller surface at 2.
  • the suction end of the baffle is bent in such a way that the baffle per unit length is much more distant from the surface of the fan roller than on its remaining length; the tangent to the bent baffle end and a straight line through the center of the fan roller enclose an acute angle w between -50 ° and + 70 °.
  • the vortex generator 5 consists of three legs 10, 11 and 12, the free ends of the legs 10 and 12 in the embodiment shown in FIG. 4 extending to the edges of the side parts 9.
  • the leg 10 is a straight line which merges into the leg 11 at the point 4 of the greatest approach of the vortex generator 5 to the fan roller surface.
  • the imaginary extension of the leg 10 includes the angle y between 20 ° and 100 ° with the straight line between the center of the fan roller and point 4.
  • the leg 11 is also a straight line. This straight line includes the angle ⁇ between 0 ° and 30 ° with the tangent in point 4 to the fan roller surfaces.
  • the vortex generator 5 bends upward at the transition between leg 11 and leg 12 and runs either in an arc shape or multiple bends towards the pressure-side housing edge.
  • the tangent to the leg 12 in the region of the transition from leg 11 to leg 12 includes the angle s with the tangent through point 4.
  • the leg 10 has a length of approximately 0.35 ⁇ fan roller diameter d.
  • the length of leg 11 is approximately 0.25 x d and the length of leg 12 is approximately 0.3 x d.
  • the distance between vortex generator 5 and fan roller at point 4 is approximately 0.06 d.
  • the exemplary embodiment shown in FIG. 4 is a cross-flow fan that works without recirculation.
  • the new cross-flow fan can also be designed such that it allows operation with recirculation.
  • Such an embodiment is shown in FIG. 5.
  • the configuration of the cross-flow fan according to FIG. 5 differs from the cross-flow fan according to FIG. 4 in that the leg 11 is no longer shaped as a straight line, but rather as a bulge or curvature 13.
  • FIG. 6 Another embodiment for a cross-flow fan with recirculation is illustrated in FIG. 6.
  • the shape of the leg 11 is unchanged from the cross-flow fan shown in FIG. 4.
  • the legs 10 and 12 are provided with openings 14 which - as indicated by the arrows - allow partial backflow from the pressure side to the suction side.
  • FIG. 7 Another embodiment for a cross-flow fan with recirculation is shown in FIG. 7.
  • This solution consists in shortening the end of the vortex generator 5, i.e. its legs 10 and 12, so that a partial backflow from the pressure side to the suction side can also occur in this way - as also indicated by arrows. All of the measures explained in FIGS. 5 to 7 are intended to extend over the entire length of the vortex generator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP84108520A 1983-07-23 1984-07-19 Querstromlüfter Expired EP0132793B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3326651 1983-07-23
DE19833326651 DE3326651A1 (de) 1983-07-23 1983-07-23 Querstromluefter

Publications (2)

Publication Number Publication Date
EP0132793A1 EP0132793A1 (de) 1985-02-13
EP0132793B1 true EP0132793B1 (de) 1987-01-14

Family

ID=6204785

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108520A Expired EP0132793B1 (de) 1983-07-23 1984-07-19 Querstromlüfter

Country Status (5)

Country Link
US (1) US4705453A (ja)
EP (1) EP0132793B1 (ja)
JP (1) JPS6043193A (ja)
AU (1) AU3079884A (ja)
DE (2) DE3326651A1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175229B1 (de) * 1984-09-21 1990-03-21 Heidolph-Elektro GmbH & Co. KG Querstromgebläse
US5197850A (en) * 1987-01-30 1993-03-30 Sharp Kabushiki Kaisha Cross flow fan system
FR2619422B1 (fr) * 1987-08-13 1989-12-08 Onera (Off Nat Aerospatiale) Ventilateur a courant transversal
US4930981A (en) * 1989-08-18 1990-06-05 Walker Manufacturing Company Low noise impeller
CA2028374C (en) * 1989-10-25 1994-03-29 Toru Ichikawa Automobile air conditioner
US5120193A (en) * 1990-02-26 1992-06-09 General Motors Corporation Baffle for reducing airflow noise in a scroll housing
US5314300A (en) * 1992-01-13 1994-05-24 Fasco Industries, Inc. Noise control device for centrifugal blower
JPH0634193U (ja) * 1992-03-10 1994-05-06 株式会社電商 床下換気扇
US5388958A (en) * 1993-09-07 1995-02-14 Heat Pipe Technology, Inc. Bladeless impeller and impeller having internal heat transfer mechanism
US6261051B1 (en) * 1998-09-02 2001-07-17 Gordon A. Kolacny Fan duct combination unit
HUP9903510A2 (hu) * 1999-10-12 2001-11-28 András Kertész Keresztáramú ventilátor zárt szívóelemmel, illetőleg síkáramú elszívó-leválasztó berendezés

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288355A (en) * 1956-12-07 1966-11-29 Laing Nikolaus Fluid flow machines
DE1403060A1 (de) * 1958-12-09 1969-10-02 Firth Cleveland Ltd Mittel zur Erzielung guenstiger statischer Druecke bei Stroemungsmaschinen mit unsymmetrischen Austrittsgeschwindigkeitsprofilen
US3275224A (en) * 1964-03-04 1966-09-27 Firth Cleveland Ltd Ventilating fans
US3415443A (en) * 1966-05-23 1968-12-10 Torrington Mfg Co Transverse flow blower with high velocity discharge
DE1628428B2 (de) * 1967-05-18 1976-12-30 Böhler-Zenkner GmbH & Co KG Strömungstechnik, 4005 Meerbusch Gehaeuse fuer einen staubsauger
DE1951115B2 (de) * 1969-10-10 1976-10-21 Böhler-Zenkner GmbH & Co KG Strömungstechnik, 4005 Meerbusch Querstromgeblaese
JPS5115208A (ja) * 1974-07-29 1976-02-06 Toshiba Denki Kigu Kk Oryusofuki
CH600138A5 (ja) * 1976-10-19 1978-06-15 Coester Marianne Ag
JPS6112A (ja) * 1984-06-08 1986-01-06 Takeda Chem Ind Ltd 混合粉砕物

Also Published As

Publication number Publication date
US4705453A (en) 1987-11-10
JPS6043193A (ja) 1985-03-07
DE3326651A1 (de) 1985-01-31
JPS6359038B2 (ja) 1988-11-17
AU3079884A (en) 1985-01-24
EP0132793A1 (de) 1985-02-13
DE3462062D1 (en) 1987-02-19

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