GB2413379A

GB2413379A - A smoke exhauster featuring an external blowing device

Info

Publication number: GB2413379A
Application number: GB0409190A
Authority: GB
Inventors: Kun Ta Lee
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-24
Filing date: 2004-04-24
Publication date: 2005-10-26
Also published as: GB0409190D0

Abstract

A smoke exhauster comprises a hood 10 including a port 11, an outlet pipe 12 having a first end 121 coupled to the port 11 of the hood 10 and a second end 123, and negative pressure generating means for generating a negative pressure around the second end 123 of the outlet pipe 12 to draw smoke 13 into the hood 10 and through the outlet pipe 12. The negative pressure generating means may comprise a container 14 having a chamber formed therein with an inlet 18 and outlet 16. The negative pressure generating means may include a blower 30 with a vent pipe 31 attached thereto and directed towards the exit 16 of the container. The negative pressure generating means may include at least one venturi tube 20 disposed within the container. The venturi tube may be attached to the container 14 using at least one panel (23, figure 2) and at least one rod (22, figure 2), with further venturi tubes 20 strung onto the rod (22, figure 2). In use the smoke 13 does not pass through the blower 30.

Description

1 241 3379

SMOKE EXHAUSTER HAVING SEPARATE BLOWING DEVICE

The invention relates to a smoke exhauster having a separate fan or blowing device to draw air or smoke out of the smoke exhauster without contacting with the air or smoke.

Various kinds of typical vent kitchen hoods or smoke exhausters have been developed for being attached or disposed above the stoves, and comprise one or more fan devices to draw and discharge air or smoke out of house buildings.

For example, U.S. Patent No. 3,795,181 to Lawson discloses one of the typical vent kitchen hoods or smoke exhausters comprising a centrifugal type fan device disposed in a fluid housing, to directly draw and discharge the air or the smoke out of the fluid house.

U.S. Patent No. 4,088,123 to Bowen, Jr. et al. discloses another typical vent kitchen hood comprising a fan device disposed in an intermediate portion of a hood, to directly draw and discharge the smoke out of the hood.

U.S. Patent No. 5,927,268 to Chiang et al. discloses a further typical smoke exhauster comprising two centrifugal type fan devices disposed in an upright or erected hood, to directly draw and discharge the smoke out of the hood.

U.S. Patent No. 6,626,972 to Chiang et al. discloses a still further typical smoke exhauster comprising a centrifugal type fan device disposed in a horizontal hood, to directly draw and discharge the smoke out of the hood.

In all of the typical vent kitchen hoods or smoke exhausters, the fan devices should directly contact with the smoke, to force and to draw the smoke out of the hood, such that the fan or blowing devices will be easily and quickly dirtied or contaminated by the smoke, and should be separated from the hood and should be cleaned frequently.

For example, U.S. Patent No. 3,795,181 to Lawson discloses a flue cleaning device to clean the typical vent kitchen hoods or smoke exhausters. However, the typical cleaning devices include a complicated configuration that may greatly increase the producing procedures and the manufacturing costs.

In addition, the fan or blowing devices of the typical vent kitchen hoods or smoke exhausters are directly disposed within the hood and may generate great noises while working.

It is accordingly an object of the present invention to provide a smoke exhauster including a separate fan or blowing device to draw air or smoke out of the smoke exhauster without contacting with the air or smoke, and for preventing the fan or blowing device from being dirtied or contaminated by the smoke.

SUMMARY OF THE INVENTION

According to the invention there is provided a smoke exhauster comprising: a hood for disposing above stove for receiving smoke from the stove, the hood including a port, an outlet pipe including a first end coupled to the port of the hood, and including a second end, and a negative pressure generating device for generating a negative pressure around the second end of the outlet pipe, to vacuum the outlet pipe, and to draw the smoke out through the outlet pipe. The negative pressure generating device is separated from the hood and thus will not generate noises, and the negative pressure generating device will not be directly contacted with and contaminated by the smoke.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. I is a side plan schematic view illustrating the operation of a smoke exhauster; FIG. 2 is a partial perspective view of the smoke exhauster; FIG. 3 is an enlarged partial perspective view of the smoke 1 o exhauster; FIG. 4 is an enlarged partial plan schematic view illustrating the operation of the smoke exhauster; FIGS. 5, 6, 7, 8 are side plan schematic views similar to FIG. 1, illustrating the other arrangements or applications of the smoke exhauster; FIG. 9 is a partial perspective view illustrating the further arrangement of the smoke exhauster and FIG. 10 is an enlarged partial plan schematic view illustrating the operation of the smoke exhauster.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 and 5-8, a smoke exhauster comprises a hood l0 for being disposed above a stove 90, and the hood 10 includes a port I 1 coupled to one end 12 1 of an outlet pipe 12, for drawing or draining air or smoke 13 out of the hood 10. The outlet pipe l 2 may be engaged through and/or supported by a supporting wall member 80 (FIG. 8), for example.

The smoke exhauster further includes a container 14 coupled to the other end 123 of the outlet pipe 12, and having a chamber 15 formed or provided therein to receive the air or smoke 13 from the outlet pipe 12. The outlet pipe 12 may have the other end 123 simply be coupled to the container 14 (FIGS. 1-2 and 4-7), or be engaged into the container 14 and directed toward an exit 16 of the container 14 (FIGS. 9-10), to guide the air or the smoke 13 to flow into the container 14.

A discharge tube 17 may further be provided and coupled to the exit 16 of the container 14 (FIGS. 1 and 5-7), to further facilitate the lo discharging of the air or the smoke 13 through the exit 16 of the container 14, and to circulate air or smoke from an entrance 18 of the container 14 through the exit 16 of the container 14. The container 14 may be attached to various support walls 80 (FIG. 8), or disposed or supported on floor with a foot rest device 19 or the 1 5 like.

The smoke exhauster further comprises a fan or drawing or blowing means or device 30 preferably, but not necessarily, disposed in the container 14, to force the air or the smoke 13 to flow into the container 14 via the entrance 18 of the container 14, and then to flow out through the exit 16 of the container 14, and thus to generate negative pressure around the outlet pipe 12, and/or to vacuum the outlet pipe 12, and thus to draw and to circulate the air or the smoke 13 out through the outlet pipe 12.

It is preferable that the blowing device 30 includes an outlet or vent pipe 31 attached thereto and directed toward the exit 16 of the container 14, to force the air or the smoke 13 to flow out through the exit 16 of the container 14, and thus to force or to draw the air or the smoke 13 to flow into the container 14 via the entrance 18 of the container 14, and thus to generate the negative pressure around the outlet pipe 12, and/or to vacuum the outlet pipe 12, best shown in FIGS. 1, 4-7, and 10.

One or more Venturi tubes 20 may further be provided and disposed in front of the blowing device 30, or disposed between the blowing device 30 and the exit 16 of the container 14 (FIGS. 1-6), and/or disposed behind the blowing device 30, or disposed between the blowing device 30 and the entrance 18 of the container 14 (FIGS.

6, 7), and each of the Venturi tubes 20 may include an opening 22 directed toward the blowing device 30 and/or the entrance 18 of the container 14.

The Venturi tubes 20 may be arranged to increase the flowing speed of the air or the smoke 13 into the Venturi tubes 20 and/or into the vent pipe 31 of the blowing device 30, and thus to allow the air or the smoke 13 to easily flow into the Venturi tubes 20 and/or the vent pipe 31 of the blowing device 30, and thus to facilitate the outward flowing of the air or the smoke 13 through the exit 16 of the container 14.

As shown in FIGS. 2-4, the Venturi tubes 20 may be secured or strung together with one or more rods 22, and the rods 22 may be secured between two panels 23 which may be secured to the container 14 with fasteners (not shown), adhesive materials, or by welding processes.

In operation, the blowing device 30 may force or impel the air or the smoke 13 to flow out through the exit 16 of the container 14, and thus to force or to impel or to draw the air or the smoke 13 to flow into the container 14 via the entrance 18 of the container 14, and thus to generate the negative pressure around the outlet pipe 12, and/or to vacuum the outlet pipe 12, and thus to force or to circulate the air or the smoke 13 out through the container 14 and the outlet pipe 12.

In addition, the blowing device 30 and the container 14 are separated from the hood 10, and may be disposed outside the house buildings, and thus will not generate noises. Furthermore, the blowing device 30 may generate the negative pressure around the lo outlet pipe 12, and/or to vacuum the outlet pipe 12, and thus to force or to circulate the air or the smoke 13 out through the container 14 and the outlet pipe 12, but the blowing device 30 will not be contacted with the smoke 13, and thus will not be dirtied or contaminated by the smoke 13.

Claims

CLAIMS: 1. A smoke exhauster comprising: a hood for disposing above stove

for receiving smoke from the stove, the hood including a port, an outlet pipe including a first end coupled to the port of the hood, and including a second end, and negative pressure generating means for generating a negative pressure around the second end of the outlet pipe, to vacuum the outlet pipe, and to draw the smoke out through the outlet pipe.

lo
2. A smoke exhauster as claimed in claim l, wherein the negative pressure generating means includes a container having a chamber formed therein, and having an entrance and an exit, to allow air to flow into and to flow out of the container, the outlet pipe is coupled between the port of the hood and the container, to allow the smoke to flow from the hood to the container via the outlet pipe.
3. A smoke exhauster as claimed in claim 2, wherein the negative pressure generating means includes a blowing device disposed in the container, to force the air and the smoke to flow out through the exit of the container.
4. A smoke exhauster as claimed in claim 3, wherein the blowing device includes a vent pipe attached thereto and directed toward the exit of the container, to force the air and the smoke to flow out through the exit of the container.
5. A smoke exhauster as claimed in claim 3, wherein the negative pressure generating means includes at least one Venturi tube disposed between the blowing device and the exit of the container, to facilitate a flowing of the air and the smoke out through the exit of the container.
6. A smoke exhauster as claimed in claim 5 further comprising means for securing the Venturi tube to the container.
7. A smoke exhauster as claimed in claim 6, wherein the securing means includes at least one panel attached to the container, and at least one rod securing the Venturi tube to the panel.
8. A smoke exhauster as claimed in claim 7 further comprising at least one second Venturi tube strung onto the rod.

lo
9. A smoke exhauster as claimed in claim 3, wherein the negative pressure generating means includes at least one Venturi tube disposed between the blowing device and the entrance of the container, to facilitate a flowing of the air into the entrance of the container.
10. A smoke exhauster substantially as herein described with reference to FIGS. 1-7 of the accompanying drawings.