US 2024/0131901 A1 · COOLING SYSTEM OF A VEHICLE, COMPRISING A COOLANT CIRCUIT WHICH CAN BE OPERATED AS A COOLING CIRCUIT FOR AN AC OPERATION AND AS A HEAT PUMP CIRCUIT FOR A HEATING OPERATION

Abstract

A cooling system of a vehicle, including a coolant circuit, which can be operated as a cooling circuit for an AC operation and as a heat pump circuit for a heating operation, an evaporator, a coolant compressor, a heat exchanger in the form of a coolant condenser or gas cooler for the coolant circuit or in the form of a heat pump evaporator for the heat pump circuit, a first expansion element which is paired with the evaporator, a second expansion element, the heat pump evaporator function of which is paired with the heat exchanger, and an inner heat exchanger with a high-pressure section and a low-pressure section. The low-pressure section is fluidically connected to the downstream coolant compressor. The high-pressure section of the inner heat exchanger is arranged in a coolant circuit section which connects the second expansion element to the heat exchanger.

Claims14

Dependent claims

A refrigeration system of a vehicle having a primary refrigerant circuit which is operable as a cooling circuit for an AC operation and as a heat pump circuit for a heating operation, the refrigeration system comprising, on the primary refrigerant circuit:

a compressor;
a heat exchanger;
an expansion valve which corresponds to the heat exchanger;
and
an internal heat exchanger, which comprises a high-pressure section and a low-pressure section, wherein the high-pressure section is arranged, fluidically, on a segment of the primary refrigerant circuit which connects the heat exchanger with the expansion valve, the segment provided upstream of the low-pressure section, and wherein the low-pressure section is arranged, fluidically, immediately upstream of the compressor,
wherein, during the heating operation, the refrigeration system is configured to actively flow the high-pressure section and to control the expansion valve to reduce a refrigerant pressure in the high-pressure section to approximately that of the low-pressure section, thereby disabling the internal heat exchanger during the heating operation.

3 more elements

A method for controlling a refrigeration system of a vehicle having a primary refrigerant circuit which is operable as a cooling circuit for an AC operation and as a heat pump circuit for a heating operation, the refrigeration system comprising, on the primary refrigerant circuit:

a compressor;
a heat exchanger;
an expansion valve which corresponds to the heat exchanger;
and
an internal heat exchanger, which comprises a high-pressure section and a low-pressure section, wherein the high-pressure section is arranged, fluidically, on a segment of the primary refrigerant circuit which connects the heat exchanger with the expansion valve, the segment provided upstream of the low-pressure section, and wherein the low-pressure section is arranged, fluidically, immediately upstream of the compressor,
the method comprising:
actively flowing the high-pressure section during the heating operation and controlling the expansion valve to reduce a refrigerant pressure in the high-pressure section to approximately that of the low-pressure section in order to disable the internal heat exchanger.

4 more elements

Dependencies are inferred from the claim text.

Cooling system of a vehicle, comprising a coolant circuit which can be operated as a cooling circuit for an ac operation and as a heat pump circuit for a heating operation

Life of this patent

Cooling system of a vehicle, comprising a coolant circuit which can be operated as a cooling circuit for an ac operation and as a heat pump circuit for a heating operation

Life of this patent

Abstract

Claims14