Compressor control circuit
AssigneePhillips & Temro Industries Inc.
InventorsJeffrey James Martell, Eric Graham Ruggles, John David Sweazey
Life of this patent
Estimating the term…
Abstract
The auxiliary AC system includes a temperature measurement device configured to generate a variable output based on an air temperature in an environment proximate to the AC system and a compressor control circuit communicably coupled to a variable speed motor. The compressor control circuit is configured to receive the variable output from the temperature measurement device, determine that the output indicates a change in the air temperature, and generate a control signal for the variable speed motor, the control signal including a current having a magnitude depending on the extent of the change to vary a rate at which a compressor pressurizes a refrigerant vapor.
Claims14
An auxiliary air conditioning (AC) system for a vehicle, comprising:
- an evaporator coil;
- a condenser coil coupled to the evaporator coil via a refrigerant conduit;
- a compressor disposed at the refrigerant conduit between the evaporator coil and the condenser coil, the compressor including a variable speed motor;
- a temperature sensor configured to generate an output that is proportional to an air temperature in an environment proximate to the auxiliary AC system;
- and
- an analog control circuit communicably coupled to the variable speed motor and the temperature sensor, the analog control circuit configured to generate a control signal for the variable speed motor based on the output, the analog control circuit comprising an operational amplifier including a positive input, a negative input, and a first output, the positive input coupled to a first terminal of the temperature sensor and the negative input coupled to the first output, the first output coupled to the compressor.
A vehicle, comprising:
- a main battery;
- an auxiliary battery;
- and
- an auxiliary air conditioning (AC) system coupled to the auxiliary battery to receive a supply voltage therefrom, wherein the auxiliary AC system includes:
- an evaporator coil;
- a condenser coil coupled to the evaporator coil via a refrigerant conduit;
- a compressor disposed at the refrigerant conduit between the evaporator coil and the condenser coil, the compressor including a variable speed motor;
- a temperature sensor including a first terminal coupled to the auxiliary battery, the temperature sensor configured to generate an output at a second terminal thereof that is proportional to an air temperature in an environment proximate to the auxiliary AC system;
- and
- an analog control circuit communicably coupled to the variable speed motor and the temperature sensor, the analog control circuit configured to generate a control signal for the variable speed motor based on the output, the analog control circuit comprising an operational amplifier including a positive input, a negative input, and a first output, the positive input coupled to the second terminal and the negative input coupled to the first output, the first output coupled to the compressor.
Dependencies are inferred from the claim text.