Low ambient temperature heat pump water heater systems, heat exchangers, and methods thereto
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United States of America
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Jan 28, 2025
Grant Date -
Apr 27, 2023
app pub date -
Oct 26, 2021
filing date -
Oct 26, 2021
priority date (Note) -
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Abstract
Systems and methods for a heat pump water heater can include a heat pump water heater system having an evaporator, a condenser, a vapor injection line, a compressor, and a multi-fluid heat exchanger. The vapor injection line can include an expansion valve to transition refrigerant received from the condenser at a first pressure to a second pressure. The compressor can be configured to circulate refrigerant through the condenser, the multi-fluid heat exchanger, the vapor injection line, and the evaporator. The multi-fluid heat exchanger can be configured to receive refrigerant at a first pressure from the condenser, refrigerant at a second pressure from the vapor injection line, and water. The multi-fluid heat exchanger can further facilitate heat transfer between the refrigerants at the first and second pressures and the water to preheat the water before the water is passed through the condenser.
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