CN2180920Y - Coaxial axial wind hook type smoke exhauster - Google Patents

Abstract

The utility model discloses a coaxial axial wind hood type smoke exhauster which relates to a device arranged in kitchens for sucking and exhausting the smoke and other harmful gases, comprising a hood casing, an axial flow fan, an air inlet and exhausting pipe. The hood casing comprises an inner hood casing and an outer hood casing which is arranged on the upper part and periphery of the inner hood casing. The centers of top parts are respectively provided with a coaxial vent hole and an air inlet hole. The axial flow fan is arranged in the vent hole of the inner hood casing. The air inlet and exhausting pipe, whose outer pipe is an air inlet pipe and is communicated with the air inlet hole of the outer hood casing, adopts a coaxial wall clamping corrugated pipe. The inner pipe of the air inlet and exhausting pipe is an exhausting pipe and is communicated with the vent hole of the inner hood casing. The utility model has the advantages of artful structure, high smoke-exhausting efficiency, and easy cleaning, and is particularly suitable for installation in the kitchen for sucking and exhausting the smoke.

Description

Coaxial axial wind hook type smoke exhauster

The utility model relates to a kind of smoke exhaust that is used for fume exhaust and other pernicious gas in the kitchen that is installed in.

Smoke exhaust is an imperative equipment in the family kitchen, and it utilizes blower fan and discharges the oil smoke in the kitchen and other pernicious gas outdoor by discharge duct.Though smoke exhaust pattern of the prior art is various, its basic structure is identical, promptly mainly is made up of case and the blower fan and the blast pipe that are installed in the case.According to the number of blower fan, smoke exhaust has simple eye and branches eyes, and simple eye formula only is equipped with a blower fan, and the eyes formula then is equipped with two blower fans and a shared blast pipe.No matter simple eye formula or eyes formula, its blower fan adopts centrifugal fan more, and inhalation flow is smaller, thereby smoke exhaust efficiency is lower.Especially when two centrifugal fans were worked simultaneously, the exhaust resistance of its common exhaust pipe was very big, and the mist extractor amount of smoke exhaust and the mist extractor amount of nominal differ greatly, and mist extractor efficient is lower.The oil smoke of failing in time to discharge is deposited in the case and on the fan blade, forms to be difficult to the grease layer that cleans, influences the normal operation of smoke exhaust.In addition, smoke exhaust air inlet of the prior art mostly is and freely is orientated and by indoor suction.Live in the winter time under the airtight condition in chamber, this endless form from indoor to outdoor will make the indoor negative pressure that causes, and not only increase the load of smoke exhaust, and might cause indoor other combustion furnace flue gas to pour in down a chimney, even lead to the tragedy of gas poisoning.

The purpose of this utility model promptly is the improvement suitable in addition to the structure of smoke exhaust, improving its mist extractor efficient, and avoids causing because of the work of smoke exhaust the phenomenon of indoor negative pressure.

To achieve these goals, the utility model adopts the big axial flow blower of flow to replace centrifugal fan, to improve mist extractor efficient, meanwhile, adopt coaxial double wall bellows to become the interlayer case with the outer casing closed assembly as the air intake-exhaust pipe of smoke exhaust and with inner can.Axial flow blower is installed in the inner can steam vent, indoor oil smoke by axial flow blower in the air intake-exhaust pipe, manage discharge outdoor, outdoor air is then by in air intake-exhaust pipe clamp layer and the case interlayer inlet chamber, form the ring-type fan housing at the case edge, be confined to oil smoke in the certain limit of case below and be inhaled into axial flow blower.This directed circulation both can improve mist extractor efficient, can avoid making the indoor negative pressure that causes again, was described in further detail below in conjunction with the technical characterictic of specific embodiment to the coaxial axial flow fan housing of the utility model formula smoke exhaust.

Accompanying drawing 1 is the structural representation of the coaxial axial flow fan housing of the utility model formula smoke exhaust.

Accompanying drawing 2 and accompanying drawing 3 are respectively the left view and the vertical view of case.

With reference to the accompanying drawings 1,2,3, the coaxial axial flow fan housing of the utility model formula smoke exhaust mainly is made of case, axial flow blower and air intake-exhaust pipe.Case comprises inner can 1 and outer casing 2, is circle or ellipse, and its rear portion is straight, and the edge hangs low.Outer casing 2 is stacked in the top and the periphery of inner can 1, certain interval is arranged between the two and form the interlayer case.The center of top of inner can 1 and outer casing 2 has the circular coaxial steam vent 3 and the air admission hole 4 of working in coordination with the air intake-exhaust pipe, interior oil trap 7 and the outer oil trap 8 that the edge is equipped with interior carbonated drink separating plate with holes 5 and outer carbonated drink separating plate 6 respectively and is used to collect condensed water and oil that hang low has the oil-collecting bottle 9 with inside and outside oil sump below the case rear side.Axial flow blower 10 is installed in the central authorities of inner can steam vent 3, and its suction inlet is downward, exhaust outlet makes progress.The air intake-exhaust pipe is flexible coaxial double wall bellows, and outer tube 11 is an air inlet pipe, and its inner end is communicated with outer casing air admission hole 4, and its outer end is an air inlet.Indoor in order to prevent that when blower fan is not worked outdoor airflow pours into, can an automatically controlled air door 12 be installed at the air inlet of outer tube 11.Interior pipe 13 is a blast pipe, and its inner end is communicated with inner can steam vent 4, and its outer end is exhaust outlet and stretches out beyond outer tube 11 air inlets.In order to prevent that outdoor airflow is poured in down a chimney into indoor when blower fan is not worked, can one closed type self closing door 14 be installed at interior pipe 13 exhaust outlets.If in the air intake-exhaust pipe, on pipe 13 tube walls and evenly have the overcurrent aperture on the inner can, then can form very thin air cushion layer, form grease at inner tubal wall and inner can surface deposition thereby reduce oil smoke at inner tubal wall and inner can surface.

The utility model structure is ingenious, and high also being easy to of mist extractor efficient cleaned, and also can avoid making the airtight indoor negative pressure that causes of living.Therefore, the utility model is particularly suitable for being installed in and is used for fume exhaust and other pernicious gas in the kitchen.

Claims (3)

1, a kind of coaxial axial flow fan housing formula smoke exhaust that is used for fume exhaust and other pernicious gas in the kitchen that is installed in, it is characterized in that it is by case, axial flow blower and air intake-exhaust pipe constitute, case comprises inner can and outer casing, be circle or ellipse, its rear portion is straight, the edge hangs low, outer casing is stacked in the top and the periphery of inner can, certain interval is arranged between the two, the center of top of inner can and outer casing has the circular coaxial steam vent and the air admission hole of working in coordination with the air intake-exhaust pipe, the edge that hangs low is equipped with the inside and outside oil trap that inside and outside carbonated drink separating plate with holes and being used to is collected condensed water and oil respectively, and case rear side below also has the oil-collecting bottle with inside and outside oil sump; Axial flow blower is installed in the central authorities of inner can steam vent, its suction inlet is downward, exhaust outlet upwards, the air intake-exhaust pipe is flexible coaxial double wall bellows, and outer tube is an air inlet pipe, and its inner end is communicated with the outer casing air admission hole, its outer end is an air inlet, interior pipe is blast pipe, and its inner end is communicated with the inner can steam vent, and its outer end is exhaust outlet and stretches out outside the outer tube air inlet.

2, coaxial axial flow fan housing formula smoke exhaust according to claim 1 is characterized in that being evenly distributed with on described air intake-exhaust pipe inner pipe wall and the inner can overcurrent aperture inside and outside the pipe in being communicated with.

3, coaxial axial flow fan housing formula smoke exhaust according to claim 1 is characterized in that the outer tube air inlet of described air intake-exhaust pipe is equipped with automatically controlled air door, and the pipe exhaust outlet is equipped with the closed type self closing door in the air intake-exhaust pipe.

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