Title:
ENERGY RECOVERY VENTILATOR: MEANS FOR DEFROSTING HEAT EXCHANGER MEDIUM AND DAMPER MOTOR ACTUATION MEANS
Document Type and Number:
WIPO Patent Application WO/1995/018338
Kind Code:
A1
Abstract:
An energy recovery ventilator (ERV) for exchanging indoor air with outdoor air. The ERV (1) having a housing including first, and second input ports (11, 12) and, first and second exhaust ports (13, 14), and a heat exchanger core (60). The ERV (1) further having a first blower (22) for drawing indoor air into the ERV (1), through the first input port (11), through the heat exchanger core (60) and out the first exhaust port (13), and a second blower (21) for drawing outdoor air into the ERV (1), through the second input port (12), through the heat exchanger core (60) and out the second exhaust port (14). A means for defrosting the ERV (1) is taught having a first bypass (48) from the first exhaust port (13) to the first input port (11) and second bypass from the second exhaust port (14) to the second input port (12). Dampers (42, 43) close the first exhaust port (13) and the second exhaust port (14) when defrost of the heat exchanger core (60) is needed. To defrost the heat exchanger core (60), the dampers (42, 43) close, closing the first and second exhaust ports (13, 14), air passes through the bypasses and recirculates through the heat exchanger core (60), upon the heat exchanger core (60) being defrosted the dampers (42, 43) open. While defrosting the blowers (21, 22) are set to high speed to increase the waste heat from the blower motors and to increase air circulation. A re-humidifier (51) is incorporated to transfer the moisture to the dry outside air being provided to the building. As the heat exchanger core (60) is defrosted, moisture from the heat exchanger core (60) is collected by the re-humidifier (51), the re-humidifier (51) converts the moisture to steam and provides the steam to the second input port (12).
Inventors:
DAVIS GEORGE B
Application Number:
PCT/US1994/014958
Publication Date:
July 06, 1995
Filing Date:
December 28, 1994
Export Citation:
Assignee:
HONEYWELL INC (US)
International Classes:
F24F12/00; (IPC1-7): F24F12/00
Foreign References:
| US5193610A | 1993-03-16 | |||
| US4512393A | 1985-04-23 | |||
| US4653574A | 1987-03-31 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 9, no. 135 (M - 386) 11 June 1985 (1985-06-11)
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