Ventilator unit

The ventilator unit for ventilating a room or the like having means for venting exhaust outflowing air to the outside, means for supplying fresh incoming air from the outside, and heat exchanger means for transferring heat from the exhaust air to the fresh incoming air, said heat exchanger means comprising:

• (a) two heat exchanger assemblies;
• (b) a vane arrangement having adjustable vane means for controlling both the outflowing and incoming air streams;
• (c) said vane means being rotatably mounted for guiding exhaust air through a first of said heat exchanger assemblies while incoming air is simultaneously guided through the other of said heat exchanger assemblies and in a second position said air streams are guided through opposite heat exchange assemblies;
• (d) said vane means comprising two pairs of axially displaced vanes mounted on a common shaft, each forming an acute angle of approximately the same size;
• and
• (e) wherein a vane of one pair of vanes lies in the same plane as an oppositely directed vane of the second pair.

A ventilator unit utilizing heat recovery, preferably for installation in an outside wall (2) of the room to be ventilated, such that exhaust air (A) is vented to the outside through said outside wall while incoming fresh air (B) is drawn in from the outside and supplied to the ventilator unit (1) where the air suitably conditioned, before being blown into the room, wherein the ventilator unit comprises an exhaust fan (12) for maintaining an outflow of air from the room and an inlet fan (13) for causing an inflow of air into the room, and also includes for the purpose of heat recovery a heat exchanger (15) for transferring heat from the outflowing exhaust air (A) to the incoming fresh air (B), and wherein the respective currents of air (A, B) alternate periodically through two equal regenerator masses in the form of two separate heat exchanger assemblies (15', 15") of said heat exchanger (15), which is connected to a valve device having adjustable vanes (22, 23 and 24, 25), said vanes being axially displaced on a common shaft (21) on either side of a partition wall (35) in a valve housing (20) having inlet and outlet openings (such as 36) for the currents of air (A, B), said shaft (21) which is rotatable in both directions is adapted to rotate periodically a specified angle of rotation, such that in one position the exhaust air (A) is caused to flow through a first (for example 15') of said heat exchanger assemblies (15', 15") while the incoming air flow (B) is simultaneously guided through a second (for example 15") of said heat exchange assemblies, and in a second position the respective air streams (A, B) are guided through the opposite heat exchanger assemblies, the valve device comprising two axially displaced pairs of vanes (22, 23 and 24, 25) on the shaft (21), each forming an acute angle of the same size, such that one vane (22) of a first pair lies in the same plane as an oppositely directed vane (25) of a second pair, and the other vane (23) of the first pair lies in the same plane as the other vane (24) of the second pair (24, 25), the shaft (21) being adapted to rotate periodically over such an angle between its two extreme positions, which corresponds to the angle between the vanes of each pair for ensuring efficient heat recovery/heat transfer.