초록 ▼

A system (10) for increasing the temperature of air initially delivered by an existing heat pump system (100) is provided which may be easily added to the existing heat pump system. System (10) includes a heat pump comfort controller (12) having a plurality of control signal leads (14, 16, 18 and 20

A system (10) for increasing the temperature of air initially delivered by an existing heat pump system (100) is provided which may be easily added to the existing heat pump system. System (10) includes a heat pump comfort controller (12) having a plurality of control signal leads (14, 16, 18 and 20) which are coupled in parallel relationship with a respective plurality of control signal leads (114, 116, 118 and 120) of heat pump system (100) interconnecting the heat pump indoor unit (110) with the heat pump outdoor unit (112). Heat pump comfort controller (12) includes a thermostat (50) for sensing the outdoor ambient air temperature and includes a contact (52) that closes when the outdoor ambient temperature falls below a predetermined value, conducting a control signal from the lead (14) for signaling the energization of supplemental heating units (132) of heat pump system (100). System (10) also includes a duct thermostat (62) which senses the temperature of the main supply air duct (130) of heat pump system (100) for de-energizing the supplemental heating units when the main supply air duct temperature reaches a predetermined value.

대표청구항 ▼

[ What is claimed is:] [1.] A system for increasing the temperature of air initially delivered by a heat pump system in a heating mode, comprising:a heat pump including an outdoor unit, an indoor unit and a control thermostat, the heat pump further including a plurality of first control signal leads

[ What is claimed is:] [1.] A system for increasing the temperature of air initially delivered by a heat pump system in a heating mode, comprising:a heat pump including an outdoor unit, an indoor unit and a control thermostat, the heat pump further including a plurality of first control signal leads interconnecting the indoor unit, the control thermostat and the outdoor unit, the indoor unit having a supplemental heating stage;a second thermostat located in a position for sensing a temperature of a supply air duct extending from the indoor unit of the heat pump, said second thermostat having a normally closed contact coupled between a pair of terminals and opened at a first predetermined temperature, said terminals being coupled in series relationship with a supplemental heating stage control signal lead of the plurality of first control signal leads coupled between the indoor unit and the outdoor unit, the supplemental heating stage control signal lead being coupled to the supplemental heating stage for energization thereof; and,a control assembly having a plurality of second control signal leads coupled respectively in parallel relation with the plurality of first control signal leads for output of an energization signal to the resistance heating stage control signal lead to cause the supplemental heating stage to add heat to the supply air duct until a temperature in the supply air duct exceeds said first predetermined temperature wherein said contact of said second thermostat opens.