Refrigeration – Automatic control – Selective heating or cooling
Patent
1992-08-10
1993-09-21
Tanner, Harry B.
Refrigeration
Automatic control
Selective heating or cooling
62185, 62201, 165 22, 165 50, 236 1B, F25B 2900, F25D 1702
Patent
active
052458350
ABSTRACT:
An interior thermal conditioning method and apparatus with improved zone control is disclosed. The thermal conditioning apparatus, such as a heat pump assembly, generates a desired thermal condition which is conveyed by a thermal distribution medium to a number of zones within a multiple zone building. Each zone includes a heat exchange device for receiving the thermal distribution medium. Each zone also includes a thermostat which is used to set a desired temperature range and to indicate the prevailing temperature. When the prevailing temperature is inconsistent with the desired temperature range, a conditioning request is generated. Rather than immediately responding to the conditioning request, the heat pump controller assesses the temperature of the thermal distribution medium to determine whether it is within a target range. If the thermal distribution medium is not within the target range, execution of the conditioning request is delayed while the heat pump is modulated to produce the desired thermal distribution temperature. Additional conditioning requests may be generated during this modulation period. Conditioning requests are processed after the desired thermal distribution temperature is established. Various criteria may be used to establish conditioning request priorities. Conditioning requests may be swapped with former conditioning requests which are executing. The controller establishes a steady and efficient operation of the heat pump.
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"Applied Heat Pump Systems", 1987 HVAC Handbook, pp. 9.1-9.15.
Cohen Barry M.
Popelka Andrew
Electric Power Research Institute Inc.
Tanner Harry B.
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