Control system for a heat pump system

Patent · Tue Apr 15 04:00:00 EST 1986

OSTI ID:5703936

Adams, G W; Sheeks, J L

A defrost control system is described providing first and second defrost cycles wherein a timing means includes power driven cam means and first, second, third and fourth electrical switches opening and closing in response to the cam means. The first and fourth electrical switches are adapted to be selectively electrically coupled to a relay and a temperature control means of a heat pump, and a manual selector switch is adapted to be electrically coupled to selected ones of the first, second, third and fourth electrical switches, and wherein the first and second defrost cycles are selectively provided as follows: for the first defrost cycle, the manual selector switch positioned to provide a parallel connection between the second and third electrical switches with the second switch being in series with the first and fourth switches; the first and fourth switches electrically coupled to the relay and the temperature control means, for the second defrost cycle, the manual switch positioned to provide a parallel connection between the first and second switches; the first switch electrically coupled to the relay and the temperature control means.

• Assignee: Emhart Industries, Inc., Indianapolis, IN
• Patent Number(s): US 4581901
• OSTI ID: 5703936
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
CONTROL
CONTROL SYSTEMS
DEFROSTING
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
HEAT PUMPS
POSITIONING
RELAYS
SWITCHES
TEMPERATURE CONTROL
TIMING CIRCUITS