CN2418286Y

CN2418286Y - Multi-stage blower fan

Info

Publication number: CN2418286Y
Application number: CN 00208324
Authority: CN
Inventors: 赵秀君
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-12
Filing date: 2000-04-12
Publication date: 2001-02-07
Anticipated expiration: 2010-04-12

Abstract

The utility model belongs to a blower fan for a range. The utility model comprises a casing, an air inlet, an air outlet, an impeller and an electric machine. The utility model is characterized in that the impeller is a stage connection type combining impeller which is provided with one stage or more than one stage, and is composed of an impeller unit and a guide impeller; the impeller is positioned in a labyrinth cavity chamber which is formed by series connection in the casing. The utility model solves using requirements that the output of a blower fan for a range needs high pressure and low flow. The utility model is suitable for being matched with a fuel oil fuel gas burner.

Description

Multistage kitchen range blower fan

The utility model belongs to blower fan, and is specifically a kind of for the matched utensil of fuel-gas stoves.

The blower fan that is used for the fuel-firing gas-firing burner has high blast to air-flow, the requirement of low discharge, and the present auxiliary products that still do not have special use, can only replace with the centrifugal Middle pressure draught fan of single impeller, the result be not flow excessive be exactly that blast is not enough, the just high just not low custom of selecting for use is arranged again in the practice, just can cause waste unavoidably.

The purpose of this utility model is that a kind of multistage kitchen range blower fan will be provided, and it utilizes multistage wind wheel and guiding to create the fan characteristic of high blast, low discharge, so can satisfy the particular requirement of above-mentioned fuel-firing gas-firing burner.

This multistage kitchen range blower fan, it comprises casing, intake grill, exhaust outlet, impeller and motor, it is characterized in that said impeller is one and is provided with the above tandem type combined impeller of being made up of impeller units and guide vane wheel of one-level or one-level, and be arranged in the connect mazy type chamber of formation of its casing.

Said guide vane wheel is fixedlyed connected with casing, and the rotation direction of its guide vane is opposite with the direction of impeller blade.

The utlity model has following advantage: gas enters blower fan when 1, moving, flow is determined by suction port or air outlet bore, air-flow is in the mazy type chamber, through guiding, be subjected to the drag effect on its blade face, gas pressure is increased, can export the air-flow of highpressure, low discharge, satisfy the requirement of kitchen range with the fuel-firing gas-firing burner.2, adopt the plural serial stage structure can obtain the effect of air pressure multiplication, its structural design and coupling are provided with also more convenient.3, under the condition of identical ventilation, compare with Middle pressure draught fan, its volume reduces, noise reduces, and energy consumption also has obvious reduction.

Below in conjunction with embodiment and attached being described further thereof:

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

Fig. 2 is a kind of structural drawing of impeller.

Fig. 3 is the structural representation of guide vane wheel.

Referring to embodiment's accompanying drawing.As shown in Figure 1, motor 1 is connected on the casing 2 (spiral case), and the 3rd, the back impeller former impeller of blower fan (corresponding existing) and middle impeller 4, preceding impeller 5 coaxial being connected in series, and turn round by driven by motor.The 6th, intake grill, the 7th, prime guide vane wheel, the 8th, back level guide vane wheel, the 9th, exhaust outlet.Guide vane wheel and casing are fixed, and the center is provided with perforate, and steering flow leads to next stage.

During work, impeller is driven by motor 1, air sucks from intake grill 6, enter the mazy type chamber in the casing, through being positioned at the impeller blade 11 between the side clamping plate, under centrifugal action, guide the directed cavity section into earlier, gas pressure is increased, perforate 14 by the center enters next stage chamber section, after posterior lobe wheel 3 pressurized air is bloated from exhaust outlet 9.

Closed centrifugal impeller shown in Figure 2, impeller blade 11 are positioned at 10 on side clamping plate, and its centrifugal effect that leads is better.

Guide vane wheel 12 and the casing of Fig. 3 are fixed, and air-guiding hole usefulness is made in the perforate 14 at center, crosses next stage by this hole.Be provided with monolateral fixing guide vane 13 above.The structural design of guide vane quantity, rotation direction angle and dimensional parameters all will exert an influence to pressurized effect wherein!

Claims

1, a kind of multistage kitchen range blower fan, comprise casing (2), intake grill (6), exhaust outlet (9), impeller and motor (1), it is characterized in that said impeller is one and is provided with the above tandem type combined impeller of being made up of impeller units (3,4,5) and guide vane wheel (8,7) of one-level or one-level, and be arranged in the connect mazy type chamber of formation of its casing.

2, multistage kitchen range blower fan as claimed in claim 1 is characterized in that said guide vane wheel (7,8) fixedlys connected with casing (2), and the rotation direction of its guide vane (13) is opposite with the direction of impeller blade (11).