# US 2014/0190656 A1 · Energy recovery ventilator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190656 A1 - Document ID: US20140190656A1 - Status: Published application - Kind: A1 - Application number: 14/074,055 - Filed: 2013-11-07 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: Carrier Corporation - Applicants: Carrier Corporation - Inventors: Dwight H. Heberer; Eric W. Adams - Web page: https://patentgrep.com/patent/US20140190656A1 ## CPC - F28D 21/0001: {Recuperative heat exchangers} - F24F 12/006: {using an air-to-air heat exchanger (F24F12/002 takes precedence)} - F28F 9/0246: {Arrangements for connecting header boxes with flow lines} - Y02B 30/56: Heat recovery units - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract An energy recovery system includes a heating or cooling system and an energy recovery ventilator operably connected to a component of the heating or cooling system. The energy recovery ventilator includes a supply port extending into the component to provide a supply of fresh airflow from the energy recovery ventilator to the component for use by the component. A return port extends into the component configured to receive a flow of stale air from the component while minimizing ingestion of the fresh air flow from the component into the return port. A method of operating an energy recovery system includes flowing a flow of fresh air from an energy recovery ventilator through a supply port into a component of a heating or cooling system. Stale air is flowed from the component through a return port into the energy recovery ventilator, preventing fresh air from recirculating through the return port. ## Claims ### Claim 1 An energy recovery system comprising: a heating or cooling system; and an energy recovery ventilator operably connected to a component of the heating or cooling system, the energy recovery ventilator including: a supply port extending into the component to provide a supply of fresh airflow from the energy recovery ventilator to the component of the heating or cooling system for use by the component; and a return port extending into the component configured to receive a flow of stale air from the component while minimizing ingestion of the fresh air flow from the component into the return port. ### Claim 2 (depends on 1) The energy recovery system of claim 1, wherein the return port includes a shield at least partially blocking the fresh air flow from entering the return port. ### Claim 3 (depends on 1) The energy recovery system of claim 1, wherein the return port has a triangular cross-section. ### Claim 4 (depends on 1) The energy recovery system of claim 1, wherein the return port has a curvilinear cross-section. ### Claim 5 (depends on 1) The energy recovery system of claim 1, wherein the component is a blower compartment of the heating or cooling system. ### Claim 6 (depends on 5) The energy recovery system of claim 5, wherein the return port draws the flow of stale air from a lower perimeter of the blower compartment. ### Claim 7 (depends on 6) The energy recovery system of claim 6, wherein the return port includes a shield with an opening to direct the flow of stale air toward the return port, while shielding the return port from reingestion of the fresh airflow. ### Claim 8 (depends on 1) The energy recovery system of claim 1, wherein the component is a return air duct of the heating or cooling system. ### Claim 9 (depends on 8) The energy recovery system of claim 8, wherein the return port is located in the return air duct upstream of the supply port relative to a flow direction through the return air duct. ### Claim 10 (depends on 1) The energy recovery system of claim 1, wherein the energy recovery ventilator is coupled directly to the component. ### Claim 11 A method of operating an energy recovery system comprising: flowing a flow of fresh air from an energy recovery ventilator through a supply port into a component of a heating or cooling system for use by the component; flowing stale air from the component through a return port into the energy recovery ventilator; and preventing the flow of fresh air from recirculating through the return port. ### Claim 12 (depends on 11) The method of claim 11, further comprising shielding the return port to prevent the fresh air flow from recirculating through the return port. ### Claim 13 (depends on 11) The method of claim 11, wherein the component is a blower compartment of the heating or cooling system. ### Claim 14 (depends on 11) The method of claim 11, further comprising flowing the stale airflow around a shield disposed at the return port, the shield configured to prevent reingestion of the flow of fresh air into the return port. ### Claim 15 (depends on 11) The method of claim 11, wherein the component is a return air duct of the heating or cooling system. ### Claim 16 (depends on 15) The method of claim 15, further comprising flowing the stale airflow into the return port upstream of the supply port relative to a flow direction through the return air duct.