| American Standard International, Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20090031740 | Expansion valve control system and method for air conditioning apparatus - A vapor compression air conditioning system includes a motor operated expansion valve and control unit including sensors for determining the amount of superheat of the working fluid at or adjacent to the compressor inlet. Expansion valve position is adjusted to maintain a predetermined amount of superheat. The sensors may sense working fluid evaporator temperature and temperature downstream of the evaporator. Dual motor operated expansion valves may be disposed in the working fluid conduit between the heat exchangers in a reversible system. In operation, the expansion valve position may be set as a function of ambient temperature, a previous position, and predetermined superheat requirements to minimize liquid ingestion by the compressor. | 02-05-2009 |
| 20080245354 | Furnace with integrated blower housing and heat exchanger - A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from plural burner nozzles and discharge combustion gasses to a plenum in communication with a motor driven inducer gas pump. The integrated blower housing and heat exchanger may be disposed in a cabinet including support structure for a fuel delivery manifold, associated burner nozzles and forming air inlet and outlet openings for air being circulated by the blower. | 10-09-2008 |
| 20080237217 | Heater interlock control for air conditioning system - An air conditioning apparatus, including an electric motor driven blower for circulating air through a cabinet, also includes one or more electric heating elements and a system controller operable to control energization of the heating elements and the blower motor at predetermined operating conditions by way of suitable relay or control elements. The system includes a heating interlock relay to prevent energization of the one or more heating elements if the blower motor is inoperable, operating at other than a predetermined range of speeds or the system controller detects a malfunctioning heating element control relay or the like. | 10-02-2008 |
| 20080223944 | Device and method for recording air conditioning system information - HVAC apparatus is configured to include a control system with a controller which may be connected directly to a personality module for transferring information stored in the controller related to historic operating conditions of the apparatus to the module, or information may be transferred to the controller from the module to configure the controller for operation of the apparatus at selected operating conditions of temperature, pressure and blower motor speed, for example. The personality module includes a memory circuit and a connector for releasably connecting the module to the control system of the apparatus for transferring information between the module and the controller. | 09-18-2008 |
| 20080217418 | Temperature compensation method for thermostats - An air conditioning control system and method for compensating for heat gain or loss in an air conditioned space due to window area and temperature differential between outdoor temperature and indoor temperature. For predetermined amounts of window area, as a percent of total wall area defining an enclosed space, the thermostat setpoint or measured temperature is adjusted as a function of the temperature differential between the enclosed space and the outdoor ambient temperature, for example. Data may be accumulated and stored in a controller memory for various types of structures and rates of heat transfer therethrough for various amounts and type of window area as a percent of the total wall area, for example. | 09-11-2008 |
