CN203297117U

CN203297117U - Exhaust fan

Info

Publication number: CN203297117U
Application number: CN2013203432277U
Authority: CN
Inventors: 过兆中
Original assignee: ZHEJIANG ZHONGYOU ELECTRICAL APPLIANCES CO LTD
Current assignee: ZHEJIANG ZHONGYOU ELECTRICAL APPLIANCES CO LTD
Priority date: 2013-06-13
Filing date: 2013-06-13
Publication date: 2013-11-20
Anticipated expiration: 2023-06-13

Abstract

The utility model discloses an exhaust fan which comprises an impeller, a shell body and a driving motor. A circular inner ring is arranged in the shell body. The inner ring is provided with a blocking ring which extends opposite to the shell body and has a preset depth. The section of the inner wall of the blocking ring is in an arc shape. A support is fixedly connected with the shell body in a thread mode and bends toward the inner ring. The driving motor is fixedly arranged on a fixing piece. Compared with the prior art, the blocking ring which extends to the back face of the shell body is arranged on the inner ring of the shell body, the combined structure of a traditional shell body and a protective cover is ingeniously simplified, structure is very simple, the protective cover does not need to be arranged additionally, the protection capacity that a fan blade is prevented from damaging people is achieved, the blocking ring has the function for facilitating air circulation, exhaust efficiency is improved, and meanwhile the support is fixedly connected with the shell body in the thread mode and bends toward the inner ring, the support is convenient to mount, the driving motor is convenient to fix, the plane type protective cover on the inner ring is combined for use, and the size of the exhaust fan is greatly reduced.

Description

A kind of ventilating fan

Technical field

The utility model relates to a kind of ventilating fan

Background technique

Ventilating fan is a kind of common electric, has been widely used in the various fields such as engineering factory building, warehouse, meeting room, hotel, restaurant and kitchen,, to improve the air quality of the interior space, reaches the circulation exchange of outdoor air.

in prior art, ventilating fan comprises impeller, housing and drive motor, housing is offered the inner ring due to vane rotary, housing is provided for the skeleton of fixed electrical machinery, usually this class skeleton is welded after adopting several skeletons to intersect, have simple in structure with regard to skeleton, convenient advantage of producing, the very inconvenience but the process of the installation of skeleton and welding seems, welding job has increased production stage, in order to protect, the protective housing of protrusion is set at the housing two ends generally simultaneously, this protective housing need to be produced respectively, the protective housing that protrudes also makes ventilating fan muscle power larger, therefore, it is many that this class ventilating fan housing exists component, baroque problem, its ventilation efficiency is also lower simultaneously.

The model utility content

The purpose of this utility model is to provide a kind of ventilating fan for above-mentioned the deficiencies in the prior art, can simplify mechanical structure, reduces overall volume, strengthens ventilation efficiency.

For achieving the above object, the technical solution of the utility model is: a kind of ventilating fan, comprise impeller, housing and drive motor, offer circular inner ring in housing, be provided with the support that has suitable distance with inner ring on housing, described impeller is arranged on inner ring and with drive motor and is connected, and described inner ring is provided with housing dorsad and extends the back-up ring with predetermined depth, and the inner wall section of this back-up ring is circular-arc; Described support and housing are spirally connected fixing and crooked towards inner ring, and the top of support is provided with fixed plate, and described drive motor is fixedly mounted on fixed plate.

As the further setting of such scheme, the degree of depth L of described back-up ring ₁Greater than the distance L of inner ring to impeller ₂

Further setting as such scheme, be provided with guard on described inner ring, and this guard is plane.

the beneficial effects of the utility model are: compared with prior art, the back-up ring that extends to back side of shell is set on the inner ring of housing, simplified dexterously the structure that conventional housings is combined with protective housing, not only structure is very simple, need not to install in addition protective housing and just have the protective capability that prevents that flabellum from hurting sb.'s feelings, back-up ring also has the function of the circulation of air of being beneficial to, strengthen ventilation efficiency, simultaneously, support and housing are spirally connected fixing and crooked towards inner ring, facilitate the installation of support, also be convenient to the fixing of drive motor, use in conjunction with plane protective housing on inner ring, greatly dwindled volume of the present utility model.

Description of drawings

Fig. 1 is structure schematic diagram of the present utility model;

Fig. 2 is plan view of the present utility model;

Fig. 3 is the A-A sectional view of Fig. 2.

In figure: 1, impeller, 2, housing, 3, drive motor, 4, inner ring, 5, support, 6, fixed plate, 7, guard, 8, back-up ring.

Embodiment

Below in conjunction with accompanying drawing, and in conjunction with the embodiments, the utility model is described further.

Embodiment:

As shown in Figure 1, Figure 2, Figure 3 shows, the utility model comprises impeller 1, housing 2 and drive motor 3, offer circular inner ring 4 in housing 2, be provided with the support 5 that has suitable distance with inner ring 4 on housing 2, described impeller 1 is arranged on inner ring 4 and with drive motor 3 and is connected, described inner ring 4 is provided with housing 2 dorsad and extends the back-up ring 8 with predetermined depth, and the inner wall section of this back-up ring 8 is circular-arc; Described support 5 is spirally connected fixing with housing 2 and towards inner ring 4 bendings, the top of support 5 is provided with fixed plate 6, and described drive motor 3 is fixedly mounted on fixed plate 6.

The degree of depth L of described back-up ring 8 ₁Greater than the distance L of inner ring 4 to impeller 1 ₂

Be provided with guard 7 on described inner ring 4, this guard 7 is plane.

Working principle of the present utility model is: offer circular inner ring 4 in housing 2, inner ring 4 extends the back-up ring 8 with predetermined depth, the degree of depth L of back-up ring 8 for impeller 1 rotation provides space, inner ring 4 to be provided with housing 2 dorsad ₁Greater than the distance L of inner ring 4 to impeller 1 ₂, back-up ring 8 plays protective action, need not, at housing 2 back sides, protective housing is installed and just has the protective capability that prevents that impeller 1 from hurting sb.'s feelings, and has simplified dexterously the structure that conventional housings is combined with protective housing, and its structure is very simple; The inner wall section of back-up ring 8 is circular-arc, to air, provides flow channel, is conducive to the function of circulation of air, strengthens ventilation efficiency; The top of support 5 is provided with fixed plate 6; a plurality of fixed plates 6 form fitting seat and are used for installing and fixed drive motor 3; simultaneously, support 5 is spirally connected fixing with housing 2 and, towards inner ring 4 bendings, facilitates the installation of support 5; need not cross weld; also be convenient to the fixing of drive motor 3, guard 7 is set on inner ring 4, housing 2 front ends are formed protection; this guard 7 is plane, further dwindles volume of the present utility model.

Claims

1. ventilating fan, comprise impeller (1), housing (2) and drive motor (3), offer circular inner ring (4) in housing (2), be provided with the support (5) that has suitable distance with inner ring (4) on housing (2), described impeller (1) is arranged on inner ring (4) upward and with drive motor (3), is connected, it is characterized in that: described inner ring (4) is provided with housing (2) dorsad and extends the back-up ring (8) with predetermined depth, and the inner wall section of this back-up ring (8) is circular-arc; Described support (5) is spirally connected fixing with housing (2) and towards inner ring (4) bending, the top of support (5) is provided with fixed plate (6), and described drive motor (3) is fixedly mounted on fixed plate (6).

2. a kind of ventilating fan according to claim 1, is characterized in that: the degree of depth L of described back-up ring (8) ₁Greater than the distance L of inner ring (4) to impeller (1) ₂

3. a kind of ventilating fan according to claim 1, it is characterized in that: be provided with guard (7) on described inner ring (4), this guard (7) is plane.