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US 2002/0153133 A1Published application
Ventilator system and method
AssigneeBuilding Performance Equipment, Inc.
InventorKlas C. Haglid
Life of this patent
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AssigneeBuilding Performance Equipment, Inc.
InventorKlas C. Haglid
Estimating the term…
The ventilator system and method use a isolating heat exchanger to selectively transfer heat between exhaust air leaving an enclosed space and outside air entering the enclosed space. The system operates in three basic modes, under the control of a microprocessor-based controller which is responsive to the temperatures inside and outside of the enclosed space. In the heating mode, heat is transferred from the exhaust air to the outside air when the enclosed space requires heating. In the cooling mode, heat is transferred from the outside air to the exhaust air when the outside air temperature is higher than that in the enclosed space. In the supplemental cooling mode, heat transfer between the exhaust and outside air is reduced or eliminated when the outside air temperature is below the desired temperature in the enclosed space and cooling is required. In the heating mode, the heat exchanger is selectively heated when necessary to defrost it. A by-pass is provided for the introduction of outside air in order to avoid heating of the outside air by the exhaust air during the supplemental cooling mode of operation, and/or provide fresh air to the enclosed space without cooling the heat exchanger while it is being defrosted.
A method of ventilating an enclosed space using an air handling system including an isolating heat exchanger for conducting exhaust air from 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 from one another, an enclosed space air temperature sensor, an outside air temperature sensor, a first fan to move said exhaust air through said heat exchanger, a second fan to move said outside air through said heat exchanger, and a programmed controller for controlling the flow of said exhaust air and said outside air and the heat transfer therebetween, said method comprising:
A method of ventilating an enclosed space using an air handling system including an isolating heat exchanger for conducting exhaust air from 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 from one another, an enclosed space air temperature sensor, an outside air temperature sensor, a first fan to move said exhaust air through said heat exchanger, a second fan to move said outside air through said heat exchanger, and a programmed controller for controlling the flow of said exhaust air and said outside air and the heat transfer therebetween, said method comprising:
A method of ventilating an enclosed space using an air handling system including an isolating heat exchanger for conducting exhaust air from 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 from one another, an enclosed space air temperature sensor, an outside air temperature sensor, a first fan to move said exhaust air through said heat exchanger, a second fan to move said outside air through said heat exchanger, and a programmed controller for controlling the flow of said exhaust air and said outside air and the heat transfer therebetween, said method comprising:
A system for ventilating an enclosed space, said system including an outside air duct, an inside air duct, an inside air temperature sensor, an outside temperature sensor, a heat exchanger with two sets of isolated air flow passages, one of which communicates with said outside air duct, and the other of which communicates with said inside air duct, an inside air fan positioned to force inside air through said inside air duct and said heat exchanger, an outside air fan positioned to force said outside air through said outside air duct and said heat exchanger, and a control circuit including a programmed processor for selectively operating said air fans and the exchange of heat between said inside air and said outside air in response to temperature signals received from said temperature sensors.
Dependencies are inferred from the claim text.