CN201034091Y

CN201034091Y - Fan housing of double air intake smoke exhaust ventilator

Info

Publication number: CN201034091Y
Application number: CNU2007201089592U
Authority: CN
Inventors: 茅忠群
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-03-12
Anticipated expiration: 2017-04-30

Abstract

The utility model discloses a fan volute for a double-intakes kitchen ventilator, which comprises a front cover plate, a rear cover plate and an annular intermediate case which are connected with the front cover plate and the rear cover plate, wherein, an opening forward air inlet and a backward air inlet are respectively arranged on the front cover plate and the rear cover plate. The utility model is characterized in that: the lower edge of the front cover plate and the lower edge of the rear cover plate are connected with a downward bulge curved plate, thus covering the intermediate case. Because of the additional application of a curved plate, the utility model has the advantages that: fume entering into the kitchen ventilator can be guided to the forward air inlet and the backward air inlet smoothly, not only effectively reducing the noise, but effectively reducing the wind resistance and reducing the air volume loss of the fan.

Description

The volute of blower of two air-inlet range hoods

Technical field

The utility model relates to the component structural of range hood, particularly to the improvement of the volute of blower of two air-inlet range hoods.

Background technique

Range hood is one of requisite machine for kitchen use equipment of ordinary family.At present, European-style range hood is subjected to increasing Consumer's favor because of having clean and tidy light and handy, the advantage such as little that takes up room of outward appearance.European-style range hood generally comprises the range hood case, be positioned on the case and perpendicular blower hood, blower hood is equipped with the motor of volute of blower, impeller and drives impeller, wherein volute of blower comprises front shroud, back shroud and is connected the two ring-type middle casing, have intake grill on the front shroud, back shroud is provided with motor, and impeller is promptly between forward and backward cover plate.And the difference of European-style range hood and traditional kitchen ventilator maximum is: intake grill is positioned at the side of volute of blower, it is the single side face air intake, its incoming air area is less, the cooking-fume discharging amount is not very desirable, therefore, some can be invented by double-faced ventilated volute of blower, as the patent No. is a kind of scheme the Chinese utility model patent " two air-inlet range hood " of ZL200420082377.8 and Chinese patent application " blower volute structure of the European range hood that a kind of energy is double-faced ventilated " that application number is CN200610050639.6 just provide, it is preceding, all have intake grill on the back shroud, oil smoke promptly on the intake grill from the front shroud and the back shroud gap between motor and the intake grill enter volute of blower.But the forward and backward cover plate of existing these spiral cases is all perpendicular to middle casing, that is to say, middle casing and forward and backward cover plate joint are the right angle transition, thus, the most oil smoke that enter kitchen ventilator directly strike on the middle casing from Vertical direction at first substantially, and then flow toward the intake grill place of both sides, thereby cause the air-flow on this bulk zone very disorderly, consequently: noise is bigger on the one hand, is that windage is big, wind loss is big on the other hand.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of volute of blower of improved pair of air-inlet range hood, can enter blower fan more smoothly in the hope of oil smoke, reduces noise, reduces windage and reduce wind loss.

For solving the problems of the technologies described above, the utility model adopts following technical proposals:

The volute of blower of this pair air-inlet range hood, have front shroud, back shroud and be connected the two ring-type middle casing, have preceding intake grill, rear air inlet on front shroud, the back shroud, it is characterized in that being connected with the curved plate of downward protrusion between the lower limb of the lower limb of described front shroud and back shroud, and therefore covered described middle casing.From being convenient to process and help the smooth and easy flowing angle consideration of oil smoke, described curved plate is preferably with described front shroud, back shroud and is integral part.

The minimum point place of described middle casing offers oil dripping hole, has corresponding oil leaking hole on the described curved plate, so that draw drawing oil pipe and can pass from this oil leaking hole from oil dripping hole.

Because oil smoke mobile is to flow from bottom to top earlier, promptly under the guide function of curved plate, flow to forward and backward intake grill after running into curved plate, so as long as the shape of curved plate can play shunting and guide function and avoid turbulent appearance as far as possible from both sides.Obviously, described curved plate preferably is cylindrical shape, and the bus of this cylinder is and all parallel horizontal line section in plane, described front shroud place and plane, back shroud place.Because curved plate is earlier to its shunting to the guided procedure of oil smoke, forward and backward intake grill then leads respectively, so the further preferable shape of curved plate is: described curved plate is seen from its cross section and is divided into three sections, the i.e. large radius arc section that is similar to straight line of Zhong Jian small-radius arc section and both sides, and middle small-radius arc fragment position is minimum.Consider that again the rear air inlet place need install motor, it is Comparatively speaking little that Gu Houjinfengkouchu can hold area and preceding intake grill that oil smoke passes through, so preferably the small-radius arc section of described curved plate is at described front shroud, back shroud more close described back shroud between the two, so that reasonable distribution oil smoke amount between forward and backward intake grill makes the oil smoke amount that flows to preceding intake grill more some more.

The utility model has following beneficial effect:

Because set up curved plate, can so both effectively reduced noise, reduce windage again effectively very swimmingly by its forward and backward intake grill that leads so enter the oil smoke of kitchen ventilator, reduced the wind loss of blower fan.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model embodiment spiral case;

Fig. 2 is the plan view of spiral case shown in Figure 1;

Fig. 3 is the A-A sectional view of spiral case shown in Figure 2;

Fig. 4 is the A-A three-dimensional cutaway view of spiral case shown in Figure 2;

Fig. 5 is the B-B sectional view of spiral case shown in Figure 3;

Fig. 6 is the B-B three-dimensional cutaway view of spiral case shown in Figure 3;

Fig. 7 is for installing the stereogram behind motor and the impeller in the spiral case shown in Figure 1;

Fig. 8 is the stereogram (filter screen and lubricating cup state are not installed) that the double-air intake cooking fume machine of the utility model embodiment spiral case is installed.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment

As Fig. 1～illustrated in Figure 6, be a preferred embodiment of the present utility model.As Fig. 1～shown in Figure 6, the volute of blower of the two air-inlet range hoods of present embodiment, the ring-type middle casing 3 that it has front shroud 1, back shroud 2 and is connected the two, intake grill 4, rear air inlet 5 before having on front shroud 1, the back shroud 2.Wherein, be connected with the curved plate 6 of the cylindrical shape of downward protrusion between the lower limb of the lower limb of front shroud 1 and back shroud 2, and this curved plate 6 be integral piece with front shroud 1, back shroud 2, and so and covered middle casing 3.

Referring to Fig. 4, Fig. 5, Fig. 7, the minimum point place of middle casing 3 offers oil dripping hole 7, has corresponding oil leaking hole 8 on the curved plate 6, so that draw drawing oil pipe 9 and can pass from this oil leaking hole 8 from oil dripping hole 7.

Referring to Fig. 5, the curved plate 6 of cylindrical shape, the bus of its cylinder are and all parallel horizontal line section in front shroud plane, 1 place and plane, back shroud 2 place.Referring to Fig. 2 as seen, this curved plate 6 sees from its cross section and is divided into three sections, promptly Zhong Jian small-radius arc section 61 and both sides transfers segmental arcs 62 with the long radius that are similar to straight line 61 smooth connections of small-radius arc section, and middle small-radius arc section 61 positions are minimum.And the small-radius arc section 61 of curved plate 6 is at described front shroud 1, back shroud 2 more close back shroud 2 between the two.

Referring to Fig. 7 as can be known, the motor 10 of kitchen ventilator is installed on the back shroud 2 of spiral case, and impeller 11 is installed in the spiral case.Referring to Fig. 8 as seen, the present embodiment spiral case is under user mode, and its curved plate 6 is positioned at the below, and oil smoke promptly divides under the guiding of curved plate 6 after rising in kitchen ventilator below and flows to the spiral case both sides, and and then intake grill 4, rear air inlet 5 enter spiral case and discharge outdoor in the past.

Claims

1. the volute of blower of two air-inlet range hoods, have front shroud, back shroud and be connected the two ring-type middle casing, have preceding intake grill, rear air inlet on front shroud, the back shroud, it is characterized in that being connected with the curved plate of downward protrusion between the lower limb of the lower limb of described front shroud and back shroud, and therefore covered described middle casing.

2. the volute of blower of pair air-inlet range hood according to claim 1 is characterized in that described curved plate and described front shroud, back shroud are integral piece.

3. the volute of blower of pair air-inlet range hood according to claim 1, the minimum point place that it is characterized in that described middle casing offers oil dripping hole, have corresponding oil leaking hole on the described curved plate, so that draw drawing oil pipe and can pass from oil dripping hole from this oil leaking hole.

4. according to claim 1 or 2 or the volute of blower of 3 described pairs of air-inlet range hoods, it is characterized in that described curved plate is cylindrical shape, and the bus of this cylinder is and all parallel horizontal line section in plane, described front shroud place and plane, back shroud place.

5. the volute of blower of pair air-inlet range hood according to claim 4, it is characterized in that described curved plate is seen from its cross section is divided into three sections, the i.e. large radius arc section that is similar to straight line of Zhong Jian small-radius arc section and both sides, and middle small-radius arc fragment position is minimum.

6. the volute of blower of pair air-inlet range hood according to claim 5, the small-radius arc section that it is characterized in that described curved plate is at described front shroud, back shroud more close described back shroud between the two.