CN2630540Y

CN2630540Y - Centrifugal fan with two air outlets

Info

Publication number: CN2630540Y
Application number: CN 03226335
Authority: CN
Inventors: 杨华吉; 曾罗麟
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-05-22
Filing date: 2003-05-22
Publication date: 2004-08-04
Anticipated expiration: 2013-05-22

Abstract

The utility model relates to a blower, in particular to an eccentric blower. The eccentric blower with dual air vents comprises a volute housing 1, a blade wheel 2 and an electric engine 3. The volute housing 1 is provided with a front board 4 and a back board 5 on both sides separately. In the center of the front board 4, an air vent is opened, and the blade wheel 2 driven by the electric engine 3 is installed in the volute housing 1. The volute housing 1 is of spiral volute-type dust structure, on which an upper duct 6 and a lower duct 7 are separately communicated with the upper and lower vents and are connected staggeredly. The staggering amount and the shape of the volute casing are designed based on the optimum efficiency of the eccentric blower. The central axle of the blade wheel 2 is in the center of the conjunction between the upper duct 6 and the lower duct 7 on the volute housing 1. Compared with the current eccentric blower, the utility model has advantages that the volume of the wind discharging is larger and the noise is smaller, etc.

Description

Centrifugal blower with two exhaust outlets

Technical field

The utility model relates to blower fan, especially centrifugal fan.

Background technique

Existing centrifugal fan is made of spiral case, impeller and motor, and the both sides of spiral case are respectively equipped with header board and back plate, and header board central authorities have intake grill, and for small-sized fan, for saving the space, motor is installed in the spiral case more, the outer suit impeller of motor.

Common centrifugal fan has only an exhaust outlet, and this blower fan has the blast height, and the characteristics that air quantity is big, its deficiency are that noise is big, for require little local inapplicable of noise as family and office etc.Therefore be necessary to develop little family of noise or office building blower fan product.

The model utility content

The purpose of this utility model is to disclose the little centrifugal fan of a kind of noise.

The purpose of this utility model realizes by following technical solution:

Centrifugal blower with two exhaust outlets, constitute by spiral case, impeller and motor, the both sides of spiral case are respectively equipped with header board and back plate, header board central authorities have intake grill, be installed in the spiral case by motor-driven impeller, it is characterized in that: described spiral case is the spiral type air flue structure, it has upper and lower two air channels, it communicates with upper and lower exhaust outlet respectively, the dislocation of upper and lower air channel connects, magnitude of misalignment and volute shape are pressed the centrifugal blower design, and the middle axle center of impeller is positioned at the midpoint that crosses in the upper and lower air channel of spiral case.

With accompanying drawing the utility model is further described below:

The drawing explanation

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the B-B sectional view of Fig. 1.

Among the figure: 1-spiral case, 2-impeller, 3-motor, 4-header board, plate behind the 5-, 6-upper air duct, 7-lower air duct.

Embodiment

As depicted in figs. 1 and 2, the centrifugal blower that the utility model proposes with two exhaust outlets, constitute by spiral case 1, impeller 2 and motor 3, the both sides of spiral case 1 are respectively equipped with header board 4 and back plate 5, header board 4 central authorities have intake grill, motor 3 is set in the middle part of impeller 2, and is installed in together in the spiral case 1 with impeller 2.Described spiral case 1 is the spiral type air flue structure, it has upper air duct 6 and lower air duct 7 and communicates with upper and lower exhaust outlet respectively, 7 dislocation are connected upper air duct 6 with lower air duct, magnitude of misalignment and volute shape are pressed the design of centrifugal blower optimum efficiency, and the middle axle center of impeller 2 is positioned at the midpoint that crosses of spiral case 1 upper air duct 6 and lower air duct 7.

With the contrast of existing centrifugal fan, the utlity model has the characteristics such as the big and noise of exhaust air rate is little.

Claims

1. the centrifugal blower that has two exhaust outlets, by spiral case (1), impeller (2) and motor (3) constitute, the both sides of spiral case (1) are respectively equipped with header board (4) and back plate (5), header board (4) central authorities have intake grill, the impeller (2) that is driven by motor (3) is installed in the spiral case (1), it is characterized in that: described spiral case (1) is the spiral type air flue structure, it has upper air duct (6) and lower air duct (7), it is respectively with last, following exhaust outlet communicates, dislocation is connected upper air duct (6) with lower air duct (7), magnitude of misalignment and volute shape are pressed the centrifugal blower design, and the middle axle center of impeller (2) is positioned at the midpoint that crosses of spiral case (1) upper air duct (6) and lower air duct (7).

2. the centrifugal blower with two exhaust outlets according to claim 1 is characterized in that: described motor (3) is set in the middle part of impeller (2), and and impeller (2) be installed in together in the spiral case (1).