Patent EA-004023-B1 (EA)
Title: Casing for cold bridge-free air handling unit
Inventor: BESER ERKUT
IPC: F24F13/20
Filed: 2000-04-14
Abstract: 1. A cold bridge free air handling unit casing which holds different components to change the air thermal condition mainly composed of panels (1), a door frame (3) and a door (2) the panels (1) are made of a panel inner skin (15) and a panel outer skin (16) and insulation material (9) therebetween, the door frame is made of a door frame inner skin (22) and a door frame outer skin (23) and insulation material (9) therebetween, the door which is mounted to the door frame by hinges (4) is made of a door inner skin (20) and a door outer skin (21) and insulation material (9) therebetween plastic spacer profiles (19) are inserted between the door inner and outer skins around the four sides of the door (2) to prevent direct contact of these two parts, the casing further comprises fixing beams (12) for the perpendicular connection of panels (1), the casing is further characterized in that - the circumference of the panel inner skin (19) is bent to form panel edges in which heat barrier slits (28) are out around the circumference of the panel inner skin to prevent thermal bridge formation and - grooves are provided parallel to the heat barrier slits (28) on the panel edge for a panel gasket (17) in order to prevent air leakage between the inside and the outside of the casing, - the circumference of the panel outer skin (16) is bent to form channels (29) all around the panel (1), - the bent outer edges of the panel inner and outer skins are furnished with plastic bushings (18) therebetween, said bushings being distant from each other, - a gasket seat for a gasket (17) is made on the door frame inner skin surface to prevent air leakage between door frame and panels when they are joined side by side, - channels (29) are formed around the circumference of the four sides of the door frame outer skin, - the outer edges of the door frame inner and outer skins are also furnished with plastic bushings (18), - the fixing beams are furnished with a comer gasket (11) which fills the gap between the panels (1) and the fixing beams (12) in order to prevent air leakage in the perpendicular panel connection. 2. The cold bridge free air handling unit casing according to claim 1 is characterized in that; the side by side and direct connection of the panels (1) to each others or panels (1) to the door frame (3) without formation of thermal bridge is provided by using bolts and nuts (7) which are Inserted through the said plastic bushings are placed (18) around the four outer sides of the said panel (1) and said door frame (3). 3. The cold bridge free air handling unit casing according to claim 1 is characterized in that; the perpendicular connection of the said panels (1) to each others or perpendicular connection of the said panel (1) to the said door frame (3) is provided by employing said bolts and nuts (7) which am used to join the said panel (1) to the said fixing beams (12) similarly to side by aide panel joining except that two rows of bolts (7) are used instead of one and bolts (7) in each row lay perpendicular to the ones in the other row. 4. The cold bridge free air handling unit casing according to claim 2 and 3 wherein the said channels in which the bolts and nuts (7) are employed for the panel connection are provided around the circumference of the said panels (1) are characterized by middle covers (10) and side covers (13) which are coated with insulation material (9) on the inner surfaces and are located on the panel channels (29) after side by side and perpendicular panel connection to prevent thermal leakage from the inner side of the casing to the outer side of the casing. 5. The cold bridge free air handling unit casing according to claim 1 wherein the door (2) and door frame (3) mentioned in claim 1 and made of door and door frame inner skin (20 and 22 respectively) and door and door frame outer skin (21 and 23 respectively) and insulation material (9) in between are characterized by a plastic spacer profile (18) in order to fix the said door and door frame inner skins (20, 22 ) and the said door and door frame outer skins (21,23) and prevent them from touching each others and Is further characterized by gasket groove inside the plastic profile (19) to place a continues strip gaskets(17) which are fitted in the groove of the plastic profile (19) surfaces of the said door (2) and door frame (3) and meet each others when the door is closed.