Refrigeration heat pump and auxiliary heating apparatus control system with switchover during low outdoor temperature
An improvement in a control system is described having a multistage space thermostat with a first stage adapted to control a refrigeration heat pump apparatus and with a second stage adapted to control an auxilliary heating apparatus and having an outdoor temperature responsive means responsive to outdoor temperature for disconnecting the heat pump from the first stage to render the heat pump inoperative and connecting the auxilliary heat to be controlled by the first stage when the outdoor temperature is below a predetermined value. The improvement consists of: anticipation means for each of the first and second stages of the space thermostat, and means connected to the outdoor temperature responsive means to connect the anticipation means of each of the stages to be controlled by the first stage at a predetermined outdoor temperature when the auxiliary heating apparatus is controlled by the first stage to reduce the abrupt change in controlled space temperature by the transfer of the control of auxiliary heat from the second stage to the first stage.
- Assignee:
- Honeywell, Inc., Minneapolis, MN
- Patent Number(s):
- US 4598764
- OSTI ID:
- 5465622
- Resource Relation:
- Patent File Date: Filed date 9 Oct 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HEAT PUMPS
CONTROL SYSTEMS
REFRIGERATORS
HEAT TRANSFER
HEATING SYSTEMS
TEMPERATURE CONTROL
TEMPERATURE DEPENDENCE
THERMOSTATS
CONTROL
CONTROL EQUIPMENT
ENERGY SYSTEMS
ENERGY TRANSFER
EQUIPMENT
320100* - Energy Conservation
Consumption
& Utilization- Buildings