American Standard Inc.

General Electric Company

Carl Bergt

Robert Wayne Helt

Louis E Sulfstede

Stephen P Bartlett

Darrell D Beitel

David Ames

Alain R Parmentier

Andre Vivarie

An outside section for a split system air conditioning unit. The outside section has a housing including a first side, a second side, a top, a bottom, a front, and a back. The housing also includes an air inlet located in a middle portion of the front, and an air outlet located in the first side. A first baffle divides the housing interior into first and second segments. The first segment includes the air inlet, the air outlet and a heat exchange coil located therebetween, and the second segment includes a compressor operably connected to the heat exchange coil.

Outside section for split system air conditioning unit

A microcomputer based defrost control for a heat pump system that 'learns' from previous defrost cycles to achieve optimum defrost control at each of a plurality of outdoor temperature ranges, even if the heat pump system operating parameters change due to system aging. At the conclusion of each defrost cycle, the control determines the differential temperature between the outdoor ambient air and the outdoor heat exchanger and compares that value to a value stored in microcomputer memory representing a previous best such post-defrost differential temperature for the same ambient air temperature range. The control then calculates a defrost differential temperature initiate value, corrected to compensate for any loss of defrost performance indicated by the current post-defrost cycle differential temperature. After a period of time during which a number of defrost cycles have occurred, the minimum post defrost differential temperature value for each ambient temperature range becomes the best performance measure of the defrost cycle for the heat pump system. The stored minimum values are reset to zero when the control and heat pump system are deenergized. When the system is again turned on, new optimum defrost initiate values are again determined over a period of time. In addition, various default conditions cause the control to initiate an extended defrost cycle. The control is programmed to alert the operator by lighting a lamp on the thermostat should such a fault condition occur.

Adaptive defrost control for heat pump system

In an air conditioning system for selectably heating and cooling an enclosed space under control of a room thermostat, dew point temperature of ambient air in the space is maintained below a preselected maximum value by modified use of the heating and cooling apparatus without separate humidity control. For this purpose the cooling apparatus is controlled by a sensor responsive to absolute moisture content in parallel with the normal thermostat control. Energy is further conserved by night set-back of the thermostat with cooling apparatus normally disabled in night set-back.

Space air conditioning control system and apparatus

Growing community of inventors

Tyler, TX, United States of America

Carl Bergt