KR970001999A

KR970001999A - Axial flow fan of microwave

Info

Publication number: KR970001999A
Application number: KR1019950015619A
Authority: KR
Inventors: 차재은
Original assignee: 구자홍; Lg 전자주식회사
Priority date: 1995-06-13
Filing date: 1995-06-13
Publication date: 1997-01-24

Abstract

본 발명은 전자레인지의 축류팬에 관한 것으로, 중앙에 구동수단의 회전축이 삽입되는 허브(22)가 구비되고, 상기 허브(22)의 외주면에 다수개의 날개(21)가 구비되며, 내외경비(팬 허브직경(Ｄ_Ｈ)/팬직경(Ｄ))가 0.32∼0.34의 범위에 있게 되며, 날개(21)의 피치각도(θ_Ｐ)는 허브(22)에서 팁(24)까지 41∼31°의 값이 선형적인 분포를 가지고, 스윕각도(θ_Ｓ)가 각각 허브(22)에서 팁(24)까지 0∼35°의 값이 2차포물선적으로 분포되어 구성된다. 이와 같은 본 발명에 의한 전자레인지의 축류팬에 의하면 종래의 팬과 동일 냉가능성을 가지면서도 상대적으로 낮은 회전수에서 작동되어 소음이 저감되는 이점이 있다.The present invention relates to an axial flow fan of a microwave oven, and has a hub 22 into which a rotating shaft of a driving means is inserted in the center, a plurality of wings 21 are provided on an outer circumferential surface of the hub 22, the fan hub diameter (D _H) / fan diameter (D)) that is in the range of 0.32 to 0.34, a pitch angle (θ _P of the blade ₂₁₎ includes a hub (22) to the tip (24) 41~31 ° Has a linear distribution, and the sweep angle θ _S is composed of a secondary parabolic distribution of values of 0 to 35 ° from the hub 22 to the tip 24, respectively. According to the axial fan of the microwave oven according to the present invention as described above has the same cooling potential as the conventional fan while operating at a relatively low rotation speed has the advantage that the noise is reduced.

Description

Axial flow fan of microwave

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제4도는 본 발명에 의한 팬의 구성을 보인 도면으로, (가)는 평면도, (나)는 측면도, 제5도는 본 발명에 의한 팬을 설명하기 위한 도면으로, (가)는 최대캠버를 보인 팬 날개의 단면도, (나)는 피치각도를 보인 팬 날개의 단면도, (다)는 팬 날개의 경계형상을 설명하기 위한 그래프, 제6도는 본 발명에 의한 팬의 성능을 종래의 팬과 대비하여 도시한 그래프로서, (가)는 팬의 회전수에 대비한 풍량을 도시한 그래프, (나)는 팬의 소음치를 비교한 그래프.4 is a view showing the configuration of the fan according to the present invention, (a) is a plan view, (b) a side view, 5 is a view for explaining the fan according to the invention, (a) is a maximum camber. The cross section of the fan blade, (b) is a cross-sectional view of the fan blade showing the pitch angle, (c) is a graph for explaining the boundary shape of the fan blade, Figure 6 is a performance of the fan according to the present invention compared to the conventional fan As a graph, (A) is a graph showing the air volume compared to the number of revolutions of the fan, (B) is a graph comparing the noise level of the fan.

Claims

The hub is provided in the center is inserted into the rotation axis of the drive means, the outer peripheral surface of the hub is provided with a plurality of wings, the inner and outer ratio (fan hub diameter / fan diameter) is in the range of 0.32 ~ 0.34, pitch angle of the wing Is a linear distribution of 41 to 31 ° from the hub to the tip, and the sweep angle is distributed from the hub to the tip from 0 to 35 ° in a secondary parabolic line.

The distance between the vanes when the hub is set to 0 tips is 1 to 7 mm at the hub, 11 to 13 mm at the 0.75 position, 9 to 11 mm at the 0.95 position, and 23 to 25 mm at the tip. The maximum camber position is in the position of 0.7 ~ 0.8, the maximum cover ratio is 4 to 12% linear distribution from the hub to the tip of the axial flow fan.

The number of the blades is 5, the fan diameter is 108mm, the fan hub diameter is 35.6mm, the maximum camber position is 0.75 (when the hub is 0, the tip is 1) position And a maximum camber ratio of 5% at the hub and 11% at the tip, with a forward forward distance of 11.92mm, a rear forward distance of 22.22mm, and a wing width of 34.14mm.

※ Note: The disclosure is based on the initial application.