A vehicle air-conditioning device includes: a first coolant-water circulation path in which coolant water passes through an engine ; a second coolant-water circulation path that is communicated with the first coolant-water circulation path and in which the coolant water passes through a vehicle-cabin radiator; a shutting off mechanism that shuts off, when switched to a shut-off state, the communication between the first coolant-water circulation path and the second coolant-water circulation path; and a refrigeration cycle. The refrigeration cycle has: a compressor for compressing cooling medium; a secondary evaporator in which the cooling medium absorbs heat from the coolant water in the first coolant-water circulation path; a secondary condenser that releases heat of the cooling medium that has absorbed the heat at the secondary evaporator to the coolant water in the second coolant-water circulation path; and a secondary expander that decompresses the cooling medium that has passed through the secondary condenser.

A battery cooling system includes a cooling water circulation circuit for circulating cooling water for cooling the battery, a first heat exchanger for exchanging heat between air and cooling water, a second heat exchanger for exchanging heat between the low-pressure refrigerant of the refrigeration cycle circuit and cooling water, and an ion exchanger for removing impurity ions contained in the cooling water. The first heat exchanger and the second heat exchanger are arranged in series in the cooling water circulation circuit. The ion exchanger is disposed on the downstream side of the second heat exchanger in the cooling water circulation circuit.

The present invention relates to a heat management system comprising: a refrigerant circulation line including a compressor, a compressor for compressing and discharging a refrigerant, a water cooling-type condenser for condensing the compressed refrigerant using cooling water, a first expansion valve for expanding the condensed refrigerant, and a water cooling-type evaporator for evaporating the expanded refrigerant using cooling water; a heating line including a heater core which circulates the cooling water that has exchanged heat in the water cooling-type condenser, and thereby generates conditioned air for heating; a cooling line (305) including a cabin cooler (520) which circulates the cooling water that has exchanged heat in the water cooling-type evaporator (242), and thereby generates conditioned air for cooling; and a cooling line (302) which is connected to or disconnected from the heating line according to the cooling/heating mode, and cools a battery (350) and an electrical component (460). The heat management system enables efficient heat management of an electrical component and a battery in a vehicle, in addition to the cooling and heating of the vehicle, and can improve heat pump performance and system efficiency.

A vehicle arrangement (20) for thawing thermal energy from and/or rejecting thermal energy to a plurality of components in a vehicle, the arrangement comprising a heat-pump assembly (12) comprising a first heat-pump section (18) at a first temperature and a second heat-pump section (22) at a second temperature different from the first temperature, and a first thermal energy distribution path (26) for transporting a first carrier fluid and extending through at least a portion of the first heat-pump section (18), and a second thermal energy distribution path (28) for transporting a second carrier fluid and extending through at least a portion of the second heat-pump section (22). The arrangement further comprises a first circulation pump (32) associated with the first thermal energy distribution path (26) for pumping the first carrier fluid around the first thermal energy distribution path and a second circulation pump (34) associated with the second thermal energy distribution path (28) for pumping the second carrier fluid around the second thermal energy distribution path. In addition the system comprises means (78-100) for selectively connecting at least one of the plurality of vehicle components to at least one of the thermal energy distribution paths so as to draw thermal energy from and/or reject thermal energy to said vehicle component or components.

A refrigerant loop of a vapor injection heat pump includes a compressor, first and second expansion valves, and first and second separator valves. The separator valves allow an entire refrigerant flow to pass therethrough or operate to separate vapor and liquid components of expanded refrigerant and inject the vapor component into a suction port of the compressor. Vapor injection occurs in both heating and cooling modes of operation and may depend upon an ambient condition (e.g., high or low ambient temperatures). An accumulator receives an output refrigerant of the heat exchangers dependent upon the mode and directs a vapor component into another suction port of the compressor. A control module controls at least the first and second expansion valves and first and second separator valves dependent upon the mode of operation which include, among others, heating, cooling, and dehumidification and re-heating.

The invention relates to a circuit (1) for coolant (47) comprising a main duct (3), a first branch (4), a second branch (5) and a third branch (25), the main duct (3) comprising a compression device (2) and a main heat exchanger (8) arranged to be traversed by an external air flow (EF), the first branch (4) comprising a first heat exchanger (13) thermally coupled to a loop (14) for heat transfer liquid (48) and an accumulation device (15), the second branch (5) comprising a second heat exchanger (17), the third branch (25) comprising a third heat exchanger (26), characterised in that the first branch (4) and the second branch (5) are parallel and meet at a convergence point (6), the first branch (4) and the third branch (25) meet at a first junction point (19). Application to motor vehicles.

Disclosed are climate systems for vehicles and methods for controlling the climate systems. In some implementations, a climate system includes: (1) a temperature sensor configured to measure a temperature within the compartment of the vehicle; (2) a first compressor powered by an engine of the vehicle to compress a refrigerant; (3) a second compressor driven by an electric motor to compress the refrigerant; and (4) a controller electrically coupled to the first compressor and the second compressor. The controller configured to: (1) calculate a thermal load of the compartment based on a difference between a desired temperature and a measured temperature; and, (2) based on the calculated load, selectively activate: (i) the engine, (ii) the first compressor, and/or (iii) the second compressor.

A cooling system for cooling a hybrid vehicle apparatus includes a compressor that circulates a refrigerant, a first heat exchanger that carries out heat exchange between the refrigerant and outside air, an expansion valve that reduces the pressure of the refrigerant, a second heat exchanger that carries out heat exchange between the refrigerant and air-conditioning air, a cooling portion that cools the hybrid vehicle apparatus using the refrigerant that flows between the heat exchanger and the expansion valve, a gas-liquid separator that separates the refrigerant that flows between the heat exchanger and the cooling portion into a liquid-phase refrigerant and a gas-phase refrigerant, and a liquid accumulator that is provided between the gas-liquid separator and the cooling portion, and that retains the liquid-phase refrigerant separated by the gas-liquid separator.

A thermal management system for an electrified vehicle and a method for managing such a system, according to an exemplary aspect of the present disclosure includes, among other things, a first cooling circuit, a second cooling circuit, and a third cooling circuit. The first cooling circuit cools a battery pack and includes a battery chiller in fluid communication with a cooling system inlet to the battery pack. The second cooling circuit cools the battery chiller and includes at least a first compressor and a first condenser in fluid communication with the battery chiller. The third cooling circuit cools a passenger cabin and includes at least a second compressor and a second condenser, and wherein the third cooling circuit is independent of the second cooling circuit.

A vehicle air conditioning system is configured to cool a passenger compartment having a first zone and a second zone. An air handler has a recirculation door movable from a first position in which only fresh air from outside the vehicle enters the air handler and a second position in which only recirculation air from the first zone enters the air handler. A controller is connected to the first sensor, the recirculation door and a control panel. The controller is configured such that in response to the control panel being set to: provide cooling only to the second zone; the recirculation door being set to provide fresh air; and a first sensor's conditions being meet, the controller changes the setting of the recirculation door from fresh air to recirculated air to the air handler over-riding a manual setting of the position of the recirculation door.