Internal Circulation Range Hood

Abstract

Disclosed is an internal circulation range hood, comprising a housing, an air-suction inlet, a fan, a cold compression chamber, an air-guide outlet, and a cooling device, wherein the air-suction inlet is in communication with the cold compression chamber and the cold compression chamber is in communication with the air-guide outlet. The fan is disposed at the air-suction inlet. The housing is in a shape of hood, and is internally provided with a hollow fume suction chamber. The air-suction inlet is arranged at atop of the fume suction chamber, and the air-guide outlet is located at a lower edge of an inner wall of the fume suction chamber, an opening of the air-guide outlet obliquely or directly faces the air-suction inlet.

What is claimed is: 
     
         1 . An internal circulation range hood comprising:
 a housing,   an air-suction inlet,   a fan,   a cold compression chamber,   an air-guide outlet, and   a cooling device,   wherein:
 the air-suction inlet is in communication with the cold compression chamber, and the cold compression chamber is in communication with the air-guide outlet; 
 the fan is disposed at the air-suction inlet; 
 the housing is in a shape of hood, and is internally provided with a hollow fume suction chamber; 
 the air-suction inlet is arranged at the top of the fume suction chamber; and 
 the air-guide outlet is arranged at a lower edge of an inner wall of the fume suction chamber, such that an opening of the air-guide outlet obliquely or directly faces the air-suction inlet. 
   
     
     
         2 . The internal circulation range hood according to  claim 1 , further comprising a purification device, wherein the purification device is disposed at any position in the housing where gas passes. 
     
     
         3 . The internal circulation range hood according to  claim 2 , wherein the purification device comprises a mechanical grease separation device, the mechanical grease separation device being arranged at the air-suction inlet. 
     
     
         4 . The internal circulation range hood according to  claim 3 , wherein the purification device further comprises one, or any combination, of an electrostatic oil fume purifier, a HEPA filter, an activated carbon filter material, a photocatalyst filter, and an ultraviolet lamp. 
     
     
         5 . The internal circulation range hood according to  claim 1 , wherein the air-guide outlet has a plurality of holes provided around the lower edge of the inner wall of the fume suction chamber and arranged in the same orientation. 
     
     
         6 . The internal circulation range hood according to  claim 5 , wherein the air-guide outlet is provided obliquely, and the direction of gas obliquely exhausted from the air-guide outlet is consistent with a rotation direction of the fan. 
     
     
         7 . The internal circulation range hood according to  claim 1 , wherein:
 the cooling device comprises a water inlet valve, a condenser, a water tank, and a water outlet valve, and   the condenser is in communication with the water tank, the water inlet valve is in communication with the condenser or the water tank, the water outlet valve is in communication with the water tank, and the condenser is disposed inside the cold compression chamber.   
     
     
         8 . The internal circulation range hood according to  claim 1 , further comprising a thermal insulation layer, the thermal insulation layer being provided around the fume suction chamber.