High efficiency range hood

Abstract

A high efficiency range hood includes a housing and a smoke exhausting device. The smoke exhausting device includes a snail-shaped air chamber, an air turbine installed in the air chamber, and an electric motor installed in the air chamber for rotating the air turbine. The air chamber has an air inlet and at least one air outlet. The housing has at least one knockout portion that communicates with the air outlet. The knockout portion communicates with the external air outlet pipe.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a range hood. In particular, the present invention relates to a high efficiency range hood.

2. Description of Related Art

Range hoods in the markets that include a housing and a smoke exhausting device installed in the housing doest not meet the specifications of the US energy star, including the efficiency rate (airflow at low speed/low speed power) >2.8 (cubic feet/min/power), the noise at low speed <2.0 Sone, and the airflow at low speed ≧100(cubic feet/min/power).

SUMMARY OF THE INVENTION

One particular aspect of the present invention is to provide a high efficiency range hood that meets the specifications of the US energy star, including the efficiency rate (airflow at low speed/low speed power) >2.8 (cubic feet/min/power), the noise at low speed <2.0 Sone, and the airflow at low speed ≧100 (cubic feet/min/power), and its structure is simple.

Another particular aspect of the present invention is to provide a high efficiency range hood. There are knockout portions at the back surface and top of the housing and can be easily linked with the air outlet pipe. The installation is simple.

The high efficiency range hood includes a housing and a smoke exhausting device. The smoke exhausting device includes a snail-shaped air chamber, an air turbine installed in the air chamber, and an electric motor installed in the air chamber for rotating the air turbine. The air chamber has an air inlet and at least one air outlet. The housing has at least one knockout portion that communicates with the air outlet. The knockout portions links with the external air outlet pipe.

There is a fan guard around the air inlet of the air chamber.

The air turbine includes an installation bottom board, a curved fan blade fastened on the installation bottom board, and a fastening frame connected with the curved fan blade.

The air outlet on the air chamber includes two side air outlets and a bottom air outlet. The knockout portions on the housing includes a first knockout portion installed on the back surface of the housing and two top knockout portions located on the top of the housing. The front surface of the housing has a vent. The first knockout portion located on the back surface of the housing communicates with the side air outlet. The two top knockout portions located on the top of the housing communicates with the bottom air outlet.

A recirculation venting cover is also included that is fastened with the air chamber and links with a front air outlet. The outlet of the recirculation venting cover communicates with the vent on the front surface of the housing and links with the vent.

The housing further is installed with a filter.

For further understanding of the present invention, refer to the following detailed description illustrating the embodiments and examples of the present invention. The description is for illustrative purpose only and is not intended to limit the scope of the claim.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of the range hood of the present invention;

FIG. 2 is a perspective view of the range hood of the present invention without filter;

FIG. 3 is an exploded perspective view of FIG. 2; and

FIG. 4 is another exploded perspective view of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Reference is made to FIGS. 1-4. The high efficiency range hood includes a housing 6 and a smoke exhausting device installed in the housing 6. The smoke exhausting device includes a snail-shaped air chamber 5, an air turbine 3 installed in the air chamber 5, and an electric motor 4 installed in the air chamber 5 for rotating the air turbine 3. The air chamber 5 has an air inlet 52 and at least one air outlet. The housing 6 has at least one knockout portion that communicates with the air outlet. The knockout portion communicates with the external air outlet pipe.

In this embodiment, the housing 6 also is installed with a filter 1. The filter 1 is installed on the housing 6 and can be disassembled for easy clean and replace. The air inlet 52 is round-shaped or has other shape. There is a fan guard 2 around the air inlet 52 of the air chamber 5. The air turbine 3 includes an installation bottom board 32, a curved fan blade 33 fastened on the installation bottom board 32, and a fixed frame 31 connected with the curved fan blade 33. The air turbine 3 is installed with the electric motor 4 via the installation bottom board 32 so that the electric motor 4 rotates the air turbine 3 to exhaust the air with oil.

The air outlet on the air chamber 5 includes two side air outlets 51, 53 and a bottom air outlet 54. The two side air outlets 51, 53 are located at two sides of the air chamber 5. The bottom air outlet 54 is located on one surface of the air chamber 5 that is opposite to a surface with the air inlet 52. The knockout portion on the housing 6 includes a first knockout 61 located on a back surface of the housing 6 and two top knockout portions 63, 64 located on the top of the housing 6. The first knockout portion 61 and the top knockout portions 64 are rectangular. The top knockout portion 63 is round-shaped. When the first knockout portion 61 and the top knockouts 63, 64 are not used, the first knockout portion 61 and the top knockout portions 63, 64 are sealed with board with corresponding shape. When the first knockout portion 61 and the top knockout portions 63, 64 are used, the boards are removed. A front surface of the housing 6 has a vent 62. The vent 62 is composed of a plurality of holes that are disposed at intervals. The first knockout portion 61 located on the back surface of the housing 6 communicates with the side air outlet 51. The two top knockout portions 63, 64 located on the top of the housing 6 communicates with the bottom air outlet 54.

A recirculation venting cover 7 is also included. The two sides of the recirculation venting cover 7 respectively form an inlet 71 and an outlet 72. The inlet 71 of the recirculation venting cover 7 is fastened with the air chamber 5 and communicates with a side air outlet 53. The outlet 72 of the recirculation venting cover 7 communicates with the vent 62 located on the front surface of the housing 6.

When the external air outlet pipe needs to be linked with the top of the housing 6, one of the top knockout portions 63, or 64 is opened. When the external air outlet pipe needs to be linked with the back surface of the housing 6, the back knockout portion 61 or the vent 62 is opened. The installation process is simple.

The air exhausting device has a snail-shaped air chamber 5 and an air turbine 3. The air chamber 5 has an air inlet 52 and air outlet. The housing 6 has knockout portion and the knockout portion is linked with the external air outlet pipe. Thereby, the efficiency of the air exhaust is high and meets the specifications of the US energy star, including the efficiency rate (airflow at low speed/low speed power) >2.8 (cubic feet/min/power), the noise at low speed <2.0 Sone, and the airflow at low speed ≧100 (cubic feet/min/power), and its structure is simple. Furthermore, the back surface of the housing 6 has a first knockout portion 61 and the top of the housing 6 has top knockout portions 63, 64 that can be easily connected with the external air outlet pipe. The installation process is easy.

The description above only illustrates specific embodiments and examples of the present invention. The present invention should therefore cover various modifications and variations made to the herein-described structure and operations of the present invention, provided they fall within the scope of the present invention as defined in the following appended claims.

Claims

1. A high efficiency range hood, comprising:

a housing; and

a smoke exhausting device disposed in the housing, wherein the smoke exhausting device includes a snail-shaped air chamber, an air turbine installed in the air chamber, and an electric motor installed in the air chamber for rotating the air turbine, the air chamber has an air inlet and at least one air outlet, the housing has at least one knockout portion that communicates with the air outlet, and the knockout portion communicates with an external air outlet pipe.

2. The high efficiency range hood as claimed in claim 1, wherein the air chamber has a fan guard around the air inlet thereof.

3. The high efficiency range hood as claimed in claim 1, wherein the air turbine includes an installation bottom board, a curved fan blade fastened on the installation bottom board, and a fastening frame connected with the curved fan blade.

4. The high efficiency range hood as claimed in claim 1, wherein the air outlet on the air chamber include two side air outlets and a bottom air outlet, the knockout portion on the housing includes a first knockout portion installed on the back surface of the housing and two top knockout portions located on the top of the housing, the front surface of the housing has a vent, the knockout portions located on the back surface of the housing communicates with one of the side air outlets, and the two top knockout portions located on the top of the housing communicates with the bottom air outlet

5. The high efficiency range hood as claimed in claim 4, further comprising a recirculation venting cover that is fastened with the air chamber and communicates with one of the side air outlets, wherein the outlet of the recirculation venting cover communicates with the vent on the side surface of the housing.

6. The high efficiency range hood as claimed in claim 1, wherein the housing further has a filter.