Ventilation unit

Abstract

A ventilation unit includes a fixing member coupled to an exhaust tube, through which exhaust gas is discharged, a discharge cap portion including a hollow discharge flange portion coupled to the fixing member, and a discharge cone portion extending from the discharge flange portion and having a narrow upper side and a wide lower side, a finish cap portion including a hollow finish flange portion arranged to be spaced from the discharge flange portion, a finish cone portion extending from the finish flange portion and having a narrow upper side and a wide lower side, and a finish plate portion closing the upper end of the finish cone portion, and a spacing member for fixing the discharge cap portion and the finish cap portion to be spaced from each other, wherein the discharge cone portion overlaps with the finish cone portion.

1 . A ventilation unit comprising:
 a fixing member coupled to an exhaust tube through which exhaust gas is discharged;   a discharge cap portion including a discharge flange portion having a hollow and coupled to the fixing member and a discharge cone portion extending from the discharge flange portion and having a narrow upper side and a wide lower side;   a finish cap portion including a finish flange portion having a hollow and disposed to be spaced from the discharge flange portion, and a finish cone portion extending from the finish flange portion and having a narrow upper side and a wide lower side, and a finish plate portion configured to close an upper end of the finish cone portion; and   a spacing member configured to space the discharge cap portion apart from the finish cap portion and configured to fix the discharge cap portion and the finish cap portion,   wherein the discharge cone portion overlaps the finish cone portion.   
     
     
         2 . The ventilation unit of  claim 1 , further comprising a grill member inserted between the fixing member and the discharge cap portion to change a discharge direction of the exhaust gas. 
     
     
         3 . The ventilation unit of  claim 2 , wherein, at at least one of the fixing member and the discharge cap portion, a fixing jaw portion on which the grill member is mounted and supported is provided. 
     
     
         4 . The ventilation unit  claim 1 , wherein, when “a” denotes a diameter of a wide lower portion of the discharge cone portion or the finish cone portion, “b” denotes a diameter of a narrow upper portion of the discharge cone portion or the finish cone portion, “c” denotes a height of the discharge cone portion or the finish cone portion, “d” denotes an overlapped height of the discharge cone portion and the finish cone portion, “e” denotes a distance between the discharge cap portion and the finish cap portion, and “y” denotes a difference between the diameter of the wide lower portion and the diameter of the narrow upper portion at the discharge cone portion or the finish cone portion, the equation “a(n)=y(n)+b(n),(n=1,2,3, . . . ),” where b(n)=10n+50,(n=1,2,3, . . . ) and y(n)=60+5((n−1)/2),(n=1,3,5, . . . ) or y(n)=50+5((n−2)/2),(n=2,4,6, . . . ), and the equation “d(n)=c(n)−e(n),(n=1,2,3, . . . ),” where c(n)=5n+15,(n=1,2,3, . . . ) and e(n)=8+7((n−1)/2),(n=1,3,5, . . . ) or e(n)=13+7((n−2)/2),(n=2,4,6, . . . ), are satisfied. 
     
     
         5 . The ventilation unit of  claim 2 , wherein, when “a” denotes a diameter of a wide lower portion of the discharge cone portion or the finish cone portion, “b” denotes a diameter of a narrow upper portion of the discharge cone portion or the finish cone portion, “c” denotes a height of the discharge cone portion or the finish cone portion, “d” denotes an overlapped height of the discharge cone portion and the finish cone portion, “e” denotes a distance between the discharge cap portion and the finish cap portion, and “y” denotes a difference between the diameter of the wide lower portion and the diameter of the narrow upper portion at the discharge cone portion or the finish cone portion, the equation “a(n)=y(n)+b(n),(n=1,2,3, . . . ),” where b(n)=10n+50,(n=1,2,3, . . . ) and y(n)=60+5((n−1)/2),(n=1,3,5, . . . ) or y(n)=50+5((n−2)/2),(n=2,4,6, . . . ), and the equation “d(n)=c(n)−e(n),(n=1,2,3, . . . ),” where c(n)=5n+15,(n=1,2,3, . . . ) and e(n)=8+7((n−1)/2),(n=1,3,5, . . . ) or e(n)=13+7((n−2)/2),(n=2,4,6, . . . ), are satisfied. 
     
     
       6. The ventilation unit  claim 3 , wherein, when “a” denotes a diameter of a wide lower portion of the discharge cone portion or the finish cone portion, “b” denotes a diameter of a narrow upper portion of the discharge cone portion or the finish cone portion, “c” denotes a height of the discharge cone portion or the finish cone portion, “d” denotes an overlapped height of the discharge cone portion and the finish cone portion, “e” denotes a distance between the discharge cap portion and the finish cap portion, and “y” denotes a difference between the diameter of the wide lower portion and the diameter of the narrow upper portion at the discharge cone portion or the finish cone portion, the equation “a(n)=y(n)+b(n),(n=1,2,3, . . . ),” where b(n)=10n+50,(n=1,2,3, . . . ) and y(n)=60+5((n−1)/2),(n=1,3,5, . . . ) or y(n)=50+5((n−2)/2),(n=2,4,6, . . . ), and the equation “d(n)=c(n)−e(n),(n=1,2,3, . . . ),” where c(n)=5n+15,(n=1,2,3, . . . ) and e(n)=8+7((n−1)/2),(n=1,3,5, . . . ) or e(n)=13+7((n−2)/2),(n=2,4,6, . . . ), are satisfied.