Heat exchanger
AssigneeBuilding Performance Equipment, Inc. (a Delaware Corporation)
InventorKlas Haglid
Life of this patent
Estimating the term…
Abstract
The ventilating system includes evaporative cooling of the exhaust air before it enters a heat exchanger to cool incoming fresh outside air. A suction fan pulls exhaust air through the heat exchanger and, in combination with a flow restrictor, reduces the pressure on the exhaust air and augments the evaporative cooling. The use of a pusher fan to force outside air through the heat exchanger ensures that any leakage in the heat-exchanger results in outside air entering exhaust air and minimizing the chances of contamination by leaking exhaust air into the incoming fresh air.
Claims11
A method of ventilating an enclosed space using an air handling system including an isolating heat exchanger for conducting exhaust air form said enclosed space and outside air into said enclosed space and exchanging heat between said exhaust air and said outside air while isolating the flows of said outside and exhaust air form one another, a first fan to move said exhaust air through said heat exchanger, a second fan to move said outside air through said heat exchanger, said first fan being located downstream from said heat exchanger in the flow path of said exhaust air for pulling said exhaust air out of said heat exchanger, the steps of:
- (a) evporatively cooling said exhaust air at a cooling location upstream of said heat exchanger in said flow path of said exhaust air, and
- (b) creating a substantial air pressure drop between said first fan and said cooling location to augment said evaporative cooling.
A ventilator for ventilating an enclosed space, said ventilator including:
- (a) an isolating heat exchanger for conducting exhaust air from said enclosed space and outside air into said enclosed space, and exchanging heat between said outside air and said exhaust air while isolating the flow of said exhaust air and said outside air from one another,
- (b) a first fan to move said exhaust air through said heat exchanger in a first direction, and
- (c) a second fan to move said outside air through said heat exchanger in a direction generally opposite to said first direction,
- (d) said first fan being a suction fan located downstream from said heat exchanger and being oriented to pull air through said heat exchanger,
- (e) a flow restrictor positioned to restrict flow or exhaust air through said heat exchanger and produce a substantial pressure reduction in exhaust air flowing through said heat exchanger, and
- (f) an evaporative cooling device for evaporatively cooling said exhaust air flowing through said heat exchanger.
A ventilator for ventilating an enclosed space, said ventilator including:
- (a) an isolating heat exchanger for conducting exhaust air from said enclosed space and outside air into said enclosed space, and exchanging heat between said outside air and said exhaust air while isolating the flow of said exhaust air and said outside air from one another,
- (b) a first fan to move said exhaust air through said heat exchanger in one direction, and
- (c) a second fan to move said outside air through said heat exchanger in a direction transverse to said first direction,
- (d) said first fan being a suction fan located downstream from said heat exchanger and being oriented to pull air through said heat exchanger, said second fan being positioned upstream from said heat exchanger and being oriented to push said outside air through said heat exchanger;
- and
- (e) a flow restrictor positioned to restrict the flow of exhaust air thorough said heat exchanger and produce a substantial pressure reduction in said exhaust air flowing through said heat exchanger.
11-31. (canceled)
Dependencies are inferred from the claim text.