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US 12,594,819 B2Granted
System and method for extreme cold starting of a heating system
AssigneesDENSO International America, Inc., Denso Corporation
InventorYilin Tian
Life of this patent
Estimating the term…
Abstract
A method and system are provided and include determining a sensed condition. When the sensed condition is below a first threshold and above a second threshold, the second threshold being less than the first threshold, a flow of coolant is started in a coolant loop comprising a first portion of a first heat exchanger. A flow of refrigerant is started in a refrigerant loop by starting a compressor within the refrigerant loop at a first speed.
Claims20
A method of operating a vehicle comprising:
- determining a sensed condition at the vehicle;
- when the sensed condition is below a first threshold and above a second threshold, the second threshold being less than the first threshold, starting a flow of coolant around a coolant loop comprising a first portion of a first heat exchanger and a heat mass of the vehicle;
- and
- starting a flow of refrigerant around a refrigerant loop fluidically separated from the coolant loop by starting a compressor within the refrigerant loop at a first speed and circulating the refrigerant back to the compressor through the first heat exchanger.
1 more element
A method comprising:
- determining a refrigerant temperature;
- when the refridgement temperature is below a first threshold and above a second threshold, the second threshold being less than the first threshold, starting a flow of coolant in a coolant loop comprising a first portion of a first heat exchanger;
- and
- starting a flow of refrigerant in a refrigerant loop by starting a compressor within the refrigerant loop at a first speed;
- and
- increasing a speed of the compressor when the refrigerant temperature is above a third threshold between the first threshold and the second threshold.
3 more elements
A method comprising:
- determining a sensed condition;
- when the sensed condition is below a first threshold and above a second threshold, the second threshold being less than the first threshold, starting a flow of coolant in a coolant loop comprising a first portion of a first heat exchanger;
- starting a flow of refrigerant in a refrigerant loop by starting a compressor within the refrigerant loop at a first speed;
- communicating refrigerant from the compressor through a second heat exchanger;
- and
- communicating coolant to the second heat exchanger in a second coolant loop fluidically coupled to the coolant loop.
3 more elements
A system for a vehicle comprising:
- a sensed condition sensor sensing a sensed condition at the vehicle;
- a coolant loop comprising a first portion of a first heat exchanger and a heat mass of the vehicle;
- a refrigerant loop comprising a compressor;
- and
- a controller programmed to,
- start a flow of coolant around the coolant loop when the sensed condition is below a first threshold and above a second threshold, the second threshold being less than the first threshold;
- and
- start a flow of refrigerant around the refrigerant loop fluidically separated from the coolant loop by starting the compressor within the refrigerant loop at a first speed and circulating the refrigerant back to the compressor through the first heat exchanger.
5 more elements
A system comprising:
- a sensed condition sensor sensing a refrigerant temperature;
- a coolant loop comprising a first portion of a first heat exchanger;
- a refrigerant loop comprising a compressor;
- and
- a controller programmed to determine a sensed condition;
- start a flow of coolant in when the sensed condition is below a first threshold and above a second threshold, the second threshold being less than the first threshold;
- start a flow of refrigerant in the refrigerant loop by starting the compressor within the refrigerant loop at a first speed;
- and
- increase a speed of the compressor when the refrigerant temperature is above a third threshold between the first threshold and the second threshold.
6 more elements
Dependencies are inferred from the claim text.