Range hood capable of resisting draft

Abstract

A range hood capable of resisting draft is provided above a counter on the top of which an air-generation device is located. The range hood comprises an air-extraction hood that has a bottom provided with an elongate air-extraction slot for drawing air upwards. Besides, an air blow groove is provided in front of the elongate air-extraction slot for blowing air downwards. A long left upright plate and a long right upright plate are respectively provided below the left and right lateral surfaces of the air-extraction hood. Thereby, when the elongate air-extraction slot draws in air, an oblique airflow is formed. Besides, the long left and right upright plates are able to hinder the draft coming from lateral sides, so as to protect the oblique airflow structure. Consequently, an intact upwards-flowing airflow is formed to exhaust soot and harmful gases.

1 . A range hood capable of resisting draft, a back of which is disposed onto a wall and is located above a counter, where an air-generation device is provided on the counter's top and has a rear end facing the wall; the range hood comprising:
 an air-extraction hood, a bottom of which is provided with an elongate air-extraction slot having an opening that faces downwards, where the elongate air-extraction slot is in communication with an air-extraction device for drawing air upwards, and the elongate air-extraction slot is located between a front end surface and a rear end surface of the air-extraction hood and is parallel to the front end surface and the rear end surface;   a long left upright plate, fixedly provided below a left lateral surface of the air-extraction hood, where the horizontal width of the long left upright plate is no less than the horizontal distance from the rear end of the air-generation device to the wall, and the vertical length of the long left upright plate is no less than the height from the counter's top to a bottom of the long left upright plate; and   a long right upright plate, fixedly provided below a right lateral surface of the air-extraction hood, where the horizontal width of the long right upright plate is no less than the horizontal distance from the rear end of the air-generation device to the wall, and the vertical length of the long right upright plate is no less than the height from the counter's top to a bottom of the long right upright plate.   
     
     
         2 . The range hood capable of resisting draft as claimed in  claim 1 , wherein a first air supply space is formed below a front end surface of the left upright plate and a front end of the left lateral surface of the air-extraction hood; and a second air supply space is formed below a front end surface of the right upright plate and a front end of the right lateral surface of the air-extraction hood. 
     
     
         3 . The range hood capable of resisting draft as claimed in  claim 1 , wherein a curved first guiding part is provided at a right side of the front end of the left upright plate, and a curved second guiding part is provided at a left side of the front end of the right upright plate. 
     
     
         4 . The range hood capable of resisting draft as claimed in  claim 1 , wherein the air-extraction hood includes an air collector; the air-extraction device is connected to a top of the air collector; and the elongate air-extraction slot is formed on a bottom of the air collector. 
     
     
         5 . The range hood capable of resisting draft as claimed in  claim 4 , wherein the air-extraction device is provided with an inlet for drawing in air and the inlet is located away from the position overhead the elongate air-extraction slot. 
     
     
         6 . The range hood capable of resisting draft as claimed in  claim 5 , wherein the counter has a front end provided with an elongate air blow part; the elongate air blow part has an elongate air blow slot corresponding to the elongate air-extraction slot; an air jet is blown upwards at an angle through the elongate air blow slot and enters into the elongate air-extraction slot so as to form an oblique air curtain between the elongate air blow slot and the elongate air-extraction slot. 
     
     
         7 . The range hood capable of resisting draft as claimed in  claim 4 , wherein the air collector has a bottom plate; the elongate air-extraction slot is formed on the bottom plate; and an oil barrier frame is provided on the bottom plate and encircles the elongate air-extraction slot. 
     
     
         8 . The range hood capable of resisting draft as claimed in  claim 1 , wherein a front end of the elongate air-extraction slot is provided with an elongate air blow groove having an opening that faces downwards; the elongate air blow groove is in communication with an air blow device for blowing air downwards; the elongate air-extraction slot and the elongate air blow groove are provided between the front end surface and the rear end surface of the air-extraction hood and are parallel to the front end surface and the rear end surface. 
     
     
         9 . The range hood capable of resisting draft as claimed in  claim 8 , wherein the air blow groove includes a left air-blow groove and a right air-blow groove that are aligned and are spaced from each other. 
     
     
         10 . A range hood capable of resisting draft, provided above a counter, where an air-generation device is provided on the counter's top; the range hood comprising:
 an air-extraction hood, a bottom of which is provided with an elongate air-extraction slot having an opening that faces downwards, where the elongate air-extraction slot is in communication with an air-extraction device for drawing air upwards, and the elongate air-extraction slot is located in the midway between a front end surface and a rear end surface of the air-extraction hood and is parallel to the front end surface and the rear end surface;   a long left upright plate, fixedly provided below the middle part of a left lateral surface of the air-extraction hood, where the horizontal width of the long left upright plate is no less than one-fourth the horizontal width of the left lateral surface of the air-extraction hood so as to cover the left lateral surface of the air-generation device, and the vertical length of the long left upright plate is no less than the height from the counter's top to a bottom of the long left upright plate; and   a long right upright plate, fixedly provided below the middle part of a right lateral surface of the air-extraction hood, where the horizontal width of the long right upright plate is no less than one-fourth the horizontal width of the right lateral surface of the air-extraction hood so as to cover the right lateral surface of the air-generation device, and the vertical length of the long right upright plate is no less than the height from the counter's top to a bottom of the long right upright plate.   
     
     
         11 . The range hood capable of resisting draft as claimed in  claim 10 , wherein the counter's top has a front end and a rear end both of which are respectively provided with an elongate air blow part; each elongate air blow part has an elongate air blow slot corresponding to the elongate air-extraction slot for blowing an air jet upwards at an angle; the blown air jet is then drawn into the elongate air-extraction slot so as to form two corresponding oblique air curtains between the elongate air-extraction slot and two elongate air blow slots. 
     
     
         12 . The range hood capable of resisting draft as claimed in  claim 11 , wherein a front end and a rear end of the elongate air blow slot are respectively provided with an elongate air blow groove having an opening that faces downwards; the elongate air blow groove is in communication with an air blow device for blowing air downwards; and the elongate air blow grooves are respectively parallel to the elongate air-extraction slot. 
     
     
         13 . The range hood capable of resisting draft as claimed in  claim 12 , wherein the air blow groove includes a left air-blow groove and a right air-blow groove that are aligned and are spaced from each other.