CN201228667Y

CN201228667Y - Exhaust fan

Info

Publication number: CN201228667Y
Application number: CNU2008200364652U
Authority: CN
Inventors: 王扬安
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-10
Filing date: 2008-06-10
Publication date: 2009-04-29
Anticipated expiration: 2018-06-10

Abstract

Disclosed is a kitchen suction fan comprising a fan outer casing (1), a reducer pipe (2), a joint pipe (3), a sealing ring (4), a ventilation door driving device (5), a ventilation door (6), an axial-flow fan (7) and a stand (8). The utility model mainly utilizes a reducer pipe structure which has functions of firstly, integrally connecting the outer casing (1) with large aperture and the joint pipe (3) with small aperture to simplify installation of the suction fan and connection of general smoke discharge pipe, secondly, preventing the inside of the fan from easy oil stain deposition, thirdly, when the suction fan is mounted horizontally, naturally the reducer pipe (2) forming a certain of slope, thereby no matter water or oil in the fan outer casing (1) flows out from just the fan outlet. The fan further utilizes the ventilation door with a driving device, thereby overcoming the problem that the ventilation door can not be opened because the ventilation door is pasted by the deposit oil stain. Additionally, inverse air flow can be prevented after closing the ventilation door, and further, due to the structural characteristics, the fan has no need to be cleaned.

Description

Induced draft fan

Affiliated technical field

The utility model relates to a kind of family kitchen induced draft fan.

Background technique

The family kitchen cooking-fume discharging is mainly with ventilating fan or range hood at present.These two kinds of blower fans all have identical defective---long-pending easily greasy dirt, and the time has been grown and will clean, otherwise influence is used, and the time of not cleaning is long more not handy more.And, clean that they are all inconvenient, be not easy.For this reason specialized designs this induced draft fan.

Summary of the invention

The utility model induced draft fan provides a kind of common defects that solves the present family kitchen lampblack exhauster of mentioning in the background technique---long-pending oily problem.In the reality family, be installed in the ventilating fan on the window, owing to long-pending oil has polluted window.Though and range hood can regularly empty long-pending oil, and is pretty troublesome.After the common cause of having studied the long-pending oil of all generations, the utility model has designed and thisly has been not easy to produce long-pending oil, also do not needed to clean, even clean also simple induced draft fan.This blower fan is because structural characteristics, only has every year several milliliters of greasy dirts to flow out or do not have greasy dirt to flow out from the blower fan port.And its versatility is very strong, can directly replace ventilating fan or replace the blower fan of being with in the range hood that covers.

The utility model induced draft fan has adopted following structure: be made up of flow blower casing (1), reducer pipe (2), mouthpiece (3), seal ring (4), door driving device (5), air door (6), axial-flow blower (7), support (8).Connect flow blower casing (1) and mouthpiece (3) by reducer pipe (2), the air door (6) of band door driving device (5) is installed near mouthpiece (3) one ends in reducer pipe (2) lining, at flow blower casing (1) outer surface seal ring (4) is arranged, support (8) is arranged in the outside of reducer pipe (2) and mouthpiece (3) joint.Airflow direction is to enter from mouthpiece, flows out from the blower fan end.

The utility model mainly is to have adopted the reducer pipe structure (also promptly: the little pipe of the big the other end of shape one end), reducer pipe (2) has following effect: the first, bigbore flow blower casing (1) and small-bore mouthpiece (3) are coupled together into as a wholely, make the installation of this induced draft fan and be connected with general smoke-ejecting pipe and become simple; The second, make and to flow through that the oil smoke air-flow of blower fan is concentrated, speed is fast, be difficult for being deposited on the internal surface of flow blower casing (1); Three, when the induced draft fan level is installed (axis horizontal), reducer pipe (2) forms certain slope naturally, makes that mouthpiece (3) end is high, flow blower casing (1) end is low, as shown in Figure 1, therefore, the long-pending oil of the minute quantity of flow blower casing (1) internal surface only can flow out from the blower fan outlet end.Do not need to install additional rain insensitive device when the induced draft fan level is installed on the exterior wall, because the gradient of reducer pipe (2), extra torrential rain also will never enter in the smoke-ejecting pipe.

The utility model adopts the air door (6) of band door driving device (5), is for when blower fan does not turn round, and closes the air-flow path that leads to public flue, stops public flue counter-current gas.If be installed on the exterior wall, then be to stop the natural wind that pours in down a chimney.Also having overcome simultaneously air door is deposited greasy dirt and clings the problem of not opening.For the little region of natural wind and be installed under the situation on the exterior wall, can not want air door (6), directly with not with this induced draft fan of air door (6) and door driving device (5).

The seal ring (4) of flow blower casing (1) outer surface plays sealing and fixation to blower fan when being fixed on the public flue.Need on public flue, open a circular hole with the same size of flow blower casing (1) outer diameter when blower fan is installed, flow blower casing (1) end is inserted in the circular hole of being opened, pass through little notch on the seal ring (4), be fixed on the public flue wall with screw.This blower fan also can be contained on the exterior wall, and this need directly insert the wall hole that has openning hole in advance from exterior wall after mouthpiece (3) end adds the segment length continued access pipeline suitable with the wall thickness degree and get final product.This blower fan also can be installed on the window, on window, open one with the identical hole of mouthpiece (3) external diameter, then blower fan mouthpiece (3) end is inserted in the hole, be fixed on the window frame by the aperture on the support (8) with screw.

Description of drawings

Fig. 1 is the Topographic plan view of the utility model.

Fig. 2 sees right elevation in the past from Fig. 1 the right mouthpiece (3) direction.

Among the figure: flow blower casing (1), reducer pipe (2), mouthpiece (3), seal ring (4), door driving device (5), air door (6), axial-flow blower (7), support (8).

Air door among the figure is to be in opening state.Blower fan, air door and drive unit all are prior aries.Do not do too much explanation.

Embodiment

Embodiment:, adopt 30W electrical machinery of ventilator and 240 millimeters flabellums of diameter according to the pattern of accompanying drawing.The internal diameter of flow blower casing (1) is 265 ± 2 millimeters, and length is 100 millimeters.Reducer pipe (2) height is 100 millimeters (they being that the heavy caliber end is 100 millimeters to small-caliber end length), desirable 158 millimeters of mouthpiece (3) external diameter, and length is 80 millimeters.When adopting these data, when the induced draft fan level was installed, the gradient of reducer pipe (2) was about 30 degree.Seal ring (4) outer diameter is 295 ± 2 millimeters, 3 millimeters of thickness, and the position is apart from 30 millimeters of blower fan outlet end.Air door (6) should be installed in the position of reducer pipe (2) the inside near mouthpiece (3).Door driving device can adopt the micromachine drive unit of band auto-lock function.The induced draft fan material can be engineering plastics or metal.

Claims

1. induced draft fan, form by flow blower casing (1), reducer pipe (2), mouthpiece (3), seal ring (4), door driving device (5), air door (6), axial-flow blower (7), support (8), it is characterized in that: connect flow blower casing (1) and mouthpiece (3) by reducer pipe (2), the air door (6) of band door driving device (5) is installed near mouthpiece (3) one ends in reducer pipe (2) lining, at flow blower casing (1) outer surface seal ring (4) is arranged, support (8) is arranged in the outside of reducer pipe (2) and mouthpiece (3) joint.