Electric roasting machine

Abstract

The present application discloses an electric roasting machine, including an outer housing, an inner housing and a heating device which are accommodated in the outer housing, the inner housing is defined between the outer housing and the heating device, and the inner housing cooperates with the heating device to form a heat insulating cavity. The electric roasting machine of the present application has the advantages of good heat insulation effect, less heat loss and high heat utilization rate.

What is claimed is: 
     
         1 . An electric roasting machine, wherein:
 the electric roasting machine comprises an outer housing, an inner housing, and a heating device, both the inner housing and the heating device are accommodated in the outer housing, the inner housing is defined between the outer housing and the heating device, and a heat insulating cavity is defined between the inner housing and the heating device;   the heating device comprises a reflecting cover, and a radiant heat source installed in the reflecting cover, the reflecting cover forms a reflecting cavity, the radiant heat source is positioned in the reflecting cavity, and an outer wall of the side of the reflecting cover away from the radiant heat source cooperates with the inner housing to form the heat insulating cavity; and   the heating device further comprises a protecting window, the reflecting cavity defines a first avoiding opening, the protecting window covers the first avoiding opening and cooperates with the reflecting cover to form a closed space.   
     
     
         2 . The electric roasting machine according to  claim 1 , wherein the heating device is located within the height range of the heat insulating cavity. 
     
     
         3 . The electric roasting machine according to  claim 1 , wherein the heat insulating cavity is a cavity having a closed upper end and formed by metal material. 
     
     
         4 . The electric roasting machine according to  claim 1 , wherein a surface of the inner housing facing the reflecting cover is coated with a reflecting layer, and the reflecting layer is a galvanized layer or an aluminized layer. 
     
     
         5 . The electric roasting machine according to  claim 1 , wherein the inner housing comprises two long sides, the quantity of the heating devices is two, one of the heating devices is installed on one of the long sides, and each of the heating devices extends along the length direction of the corresponding long side. 
     
     
         6 . The electric roasting machine according to  claim 1 , wherein a heat dissipating passage is formed between the outer housing and the inner housing. 
     
     
         7 . The electric roasting machine according to  claim 6 , wherein the upper end of the heat dissipating passage includes an air outlet. 
     
     
         8 . The electric roasting machine according to  claim 7 , wherein the distance between the outer housing and the inner housing is recorded as “d”, and “d” ranges from 3 millimeters to 30 millimeters. 
     
     
         9 . The electric roasting machine according to  claim 8 , wherein the inner housing comprises a horizontal section, and a bent section which is connected with the horizontal section, the outer housing comprises a cover section, and a inclined section which is connected with the cover section, the horizontal section is defined facing to the cover section, the bent section is defined facing to the inclined section, and the distance between the horizontal section and the cover section is smaller than the distance between the bent section and the inclined section. 
     
     
         10 . The electric roasting machine according to  claim 9 , wherein an included angle between the inclined section and the vertical plane ranges from 5 degrees to 30 degrees. 
     
     
         11 . The electric roasting machine according to  claim 7 , further comprising a bottom housing, wherein the bottom housing is connected with and covered the lower ends of the outer housing and the inner housing, the bottom housing includes an air inlet communicated with the heat dissipating passage, and the upper end of the outer housing includes an air outlet communicated with the heat dissipating passage. 
     
     
         12 . The electric roasting machine according to  claim 11 , wherein the air outlet is located at one side of the outer housing close to the inner housing. 
     
     
         13 . The electric roasting machine according to  claim 11 , wherein the cross-sectional area of the heat dissipating passage near the air inlet is larger than the cross-sectional area of the heat dissipating passage near the air outlet. 
     
     
         14 . The electric roasting machine according to  claim 11 , wherein the electric roasting machine includes a plurality of the air inlets which are below the heating device, the plurality of the air inlets are arranged at intervals along the length direction of the heating device, and the projection of the plurality of air inlets on the horizontal plane at least partially overlaps with the projection of the heating device on the horizontal plane. 
     
     
         15 . The electric roasting machine according to  claim 14 , wherein the length of the air inlets arranged below the heating device is recorded as L1, and the length of the heating device is recorded as L2, wherein the ratio of L1 to L2 is larger than or equal to 0.5 and smaller than or equal to 1.1. 
     
     
         16 . The electric roasting machine according to  claim 7 , wherein the electric roasting machine further comprises a grill, a second avoiding opening is formed at the upper end of the inner housing, the grill is supported in the second avoiding opening, and the grill is partially accommodated in the second avoiding opening. 
     
     
         17 . The electric roasting machine according to  claim 16 , wherein the inner housing includes a grill supporting portion at the second avoiding opening, and the upper end surface of the grill supporting portion is higher than the upper end surface of the outer housing. 
     
     
         18 . The electric roasting machine according to  claim 17 , wherein the electric roasting machine includes a plurality of the grill supporting portions, which are arranged at intervals and surrounding the second avoiding opening, and an airflow passage is formed between two adjacent grill supporting portions. 
     
     
         19 . The electric roasting machine according to  claim 17 , wherein the height difference between the upper end surface of the grill supporting portion and the upper end surface of the outer housing is greater than 0 and less than or equal to 10 millimeters. 
     
     
         20 . The electric roasting machine according to  claim 16 , wherein the electric roasting machine further comprises an oil drip pan, the oil drip pan is defined directly below the grill, and the projection area of the oil drip pan on the horizontal plane is equivalent to the projection area of the grill on the horizontal plane.