Device for heating and ventilating large-area vehicles

Claim 1

A device for heating and ventilating large-area vehicles which have a passenger area, a floor, and a distribution passage disposed above said floor and extending in the longitudinal direction of said passenger area; said device comprising: a housing, which is provided with air entry and air exit openings, is adapted to be arranged beneath said floor of said passenger area, and is provided with an open base adapted to face said floor, a bottom remote from said open base, two side walls, and two end walls which converge at least partially toward said bottom of said housing; said housing being of two-part construction, with a division, which is substantially parallel to said open base, dividing said housing into a frame part and a trough part; said frame part of said housing being of rectangular construction, with said open base of said housing being part of said base part, and with said bottom of said housing being part of said trough part; a portion of said open base of said housing forming said air entry opening, which is for recirculated air from said passenger area; at least one blower, which is accommodated in said housing and has a delivery pipe adapted to discharge an air flow; at least one heat exchanger suspended in said frame part of said housing in such a way that it protrudes from said frame part and beyond said division away from said open base; said heat exchanger having an inlet side for receiving said air flow discharged from said blower, and an outlet side which communicates with said air exit opening of said housing; that portion of said open base of said housing which lies in the vertical projection of said outlet side of said heat exchanger forms said air exit opening, which communicates, via a first aperture in said floor, with said distribution passage; said heat exchanger being arranged in such a way that on its inlet side it has an edge adjacent to said division; a retaining fitting provided in said trough part of said housing for receiving said blower, which, in the region of said recirculated air entry opening of said open base of said housing, extends into said frame part of said housing; said blower and said heat exchanger being arranged in such a way that said air flow discharged from said blower proceeds at a relatively acute angle relative to said open base of said housing and obliquely strikes said inlet side of said heat exchanger; the axis of through-flow of said heat exchanger being at right angles to said inlet and outlet sides of said heat exchanger, and being inclined relative to said open base of said housing at an acute angle which is greater than the acute angle of said air flow discharging from said blower; and a seal provided between said heat exchanger and said delivery pipe of said blower over the entire width of said housing in the region of said edge of said heat exchanger which lies on the inlet side thereof adjacent to said division.

Claim 2

A device for heating and ventilating large-area vehicles which have a passenger area, a floor, and a distribution passage disposed above said floor and extending in the longitudinal direction of said passenger area; said device comprising: a housing, which is provided with air entry and air exit openings, is adapted to be arranged beneath said floor of said passenger area, and is provided with an open base adapted to face said floor, a bottom remote from said open base, two side walls, and two end walls which converge at least partially toward said bottom of said housing; said housing being of two-part construction, with a division, which is substantially parallel to said open base, dividing said housing into a frame part and a trough part; said frame part of said housing being of rectangular construction, with said open base of said housing being part of said base part, and with said bottom of said housing being part of said trough part; a portion of said open base of said housing forming said air entry opening, which is for recirculated air from said passenger area; at least one blower, which is accommodated in said housing and has a delivery pipe adapted to discharge an air flow; at least one heat exchanger suspended in said frame part of said housing in such a way that it protrudes from said frame part and beyond said division away from said open base; said heat exchanger having an inlet side for receiving said air flow discharged from said blower, and an outlet side which communicates with said air exit opening of said housing; that portion of said open base of said housing which lies in the vertical projection of said outlet side of said heat exchanger forms said air exit opening, which communicates, via a first aperture in said floor, with said distribution passage; said heat exchanger being arranged in such a way that on its inlet side it has an edge adjacent to said division; a retaining fitting provided in said trough part of said housing for receiving said blower, which, in the region of said recirculated air entry opening of said open base of said housing, extends into said frame part of said housing; said blower and said heat exchanger being arranged in such a way that said air flow discharged from said blower proceeds at a relatively acute angle relative to said open base of said housing and obliquely strikes said inlet side of said heat exchanger; the axis of through-flow of said heat exchanger being at right angles to said inlet and outlet sides of said heat exchanger, and being inclined relative to said open base of said housing at an acute angle which is greater than the acute angle of said air flow discharging from said blower; and a seal provided between said heat exchanger and said delivery pipe of said blower over the entire width of said housing in the region of said edge of said heat exchanger which lies on the inlet side thereof adjacent to said division.