A system includes a battery, and a thermal regulation circuit configured for having liquid pass through and including an operative tract in a thermal exchange relationship with the battery, to control battery temperature. A refrigeration circuit is configured to have pass through that is subjectable to a non-reversible refrigeration cycle. The refrigeration circuit includes a condenser and an evaporator, which are in thermal exchange relation with a heating tract and a cooling tract of the thermal regulation circuit for thermally interacting with the liquid. A radiator is in a thermal exchange relationship with a thermal stabilization tract of the thermal regulation circuit. A valve assembly configured to have a defrosting configuration, in which the valve assembly defines a closed defrosting path for the liquid between the heating tract and the thermal stabilization tract. A heater is activatable to heat the liquid flowing through the closed defrosting path.

A heat pump includes a refrigerant loop. The refrigerant loop includes a first heat exchanger, a first region of a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a compressor, a vapor generator, an accumulator, a first expansion valve, and a first three-way valve. The compressor includes a low-pressure inlet, a mid-pressure inlet, and an outlet. The vapor generator is positioned downstream of the outlet of the compressor and upstream of both the low-pressure inlet and the mid-pressure inlet. The vapor generator includes a first region and a second region. The accumulator is positioned immediately upstream of the compressor. The accumulator includes an inlet and an outlet. The first expansion valve is positioned upstream of the accumulator. The first expansion valve includes an inlet and an outlet. The first three-way valve is positioned immediately downstream of the first expansion. valve and immediately upstream of the accumulator.

A vehicle includes a battery for traveling; an air conditioner that includes a defroster mode and that is configured to air-condition a vehicle cabin using a refrigeration cycle; a battery cooler configured to cool the battery with a coolant that is cooled by heat exchange with a refrigerant flowing through the air conditioner; and a control unit configured to control the air conditioner and the battery cooler. In a case where a temperature of the battery is higher than a reference temperature, the control unit operates the battery cooler and controls the air conditioner such that the air conditioner operates in the defroster mode when the vehicle is moving, and the control unit operates the battery cooler and stops the air conditioner when the vehicle is stopped.

Disclosed is a method for defrosting a thermal regulation circuit for a vehicle, in particular for a motor vehicle, the thermal regulation circuit being provided with a refrigerant circulation loop comprising a first heat exchanger (2), susceptible to frosting, as well as second and third exchangers (4, 6), the second and third exchangers (4, 6) being intended to exchange heat between the refrigerant and a heat transfer fluid, the loop further comprising a bottle (12) for storing a part of the refrigerant, the method comprising a step, referred to as defrosting, of circulating the refrigerant successively in the second heat exchanger (4), the bottle (12) and then the first and third exchangers (2, 6), with cooling of the refrigerant in the first and second exchangers (2, 4) and heating of the refrigerant in the third exchanger (6).

A vehicle air-conditioning device is a heat pump type vehicle air-conditioning device including an external heat exchanger that performs heat exchange between refrigerant flowing the inside thereof and outside air. With the vehicle air-conditioning device, a controller functions as a temperature-difference calculation unit that calculates the temperature difference ΔT between the refrigerant in a refrigerant flow path on the exit side of the external heat exchanger and the outside air, and in addition, the controller functions as a frost formation determination unit that determines that frost formation is caused on the external heat exchanger on the basis of the elapsed time to of a state in which the temperature difference ΔT is equal to or larger than a frost-formation temperature difference at which the frost formation may be caused on the external heat exchanger.

A heat pump system for a vehicle may include a battery cooling line that is connected with a battery module and in which coolant moves; a chiller that is connected with the battery cooling line through a first connection line to adjust a temperature of coolant by selectively exchanging a heat of a refrigerant and coolant injected therein and that is connected with a refrigerant line of an air-conditioner device through a second connection line; an electric unit device cooler including a radiator and a first water pump that are connected through a cooling line to circulate coolant for cooling a motor and an electronic unit and that is selectively connectable with the battery cooling line and the first connection line through a first valve; and a bypass line selectively connecting the second connection line and the refrigerant line through a second valve provided in the refrigerant line.

A refrigerating and air-conditioning apparatus performs, even during a heating operation under air conditions leading to formation of frost, a defrosting operation while simultaneously continuing the heating operation and improves comfort through heating by securing an appropriate amount of ventilation. A plurality of refrigeration cycles independently performs a heating operation and a defrosting operation. By controlling a ventilation damper of an indoor unit that is to perform a defrosting operation to increase the amount of ventilation, a prior ventilation operation for securing the time-averaged required amount of ventilation including the period in which the defrosting operation is being performed is performed before the defrosting operation, and after the prior ventilation is terminated, the defrosting operation is started.

Disclosed therein are a heat pump system for a vehicle and a method of controlling the heat pump system, which determines that frosting begins on an exterior heat exchanger and carries out a defrosting control if a difference value between outdoor temperature and refrigerant temperature of an outlet side of the exterior heat exchanger is above a frosting decision temperature in a heat pump mode, thereby increasing frost-prevention and defrosting effects and enhancing heating performance and stability of the system because the system recognizes the beginning of frosting on the exterior heat exchanger at a proper time so as to carry out the defrosting control.

A cooling module for an electric or hybrid motor vehicle, through which an air flow is intended to pass, having a set of heat exchangers including a first heat exchanger and a second heat exchanger; a fan casing disposed downstream, the fan casing having an outlet for the air flow; a tangential turbomachine configured so as to generate the air flow; the cooling module further including: an air discharge vent disposed downstream of the outlet for the air flow of the fan casing; and a bypass connecting the outlet for the air flow to an opening upstream of the set of heat exchangers; the air discharge vent having a closure device configured so as to redirect the air flow from the outlet towards the outside of the vehicle when in the discharge position and to redirect the air flow towards the bypass when in the recirculation position.

The present invention relates to a heat conditioning system for a motor vehicle, including: an air conditioning loop of a motor vehicle (B) in which a cooling fluid circulates and which includes a compressor (2), at least two heat exchangers (8,42) and at least one decompression device (24,26), a heat processing unit (U) of a battery (100) of the vehicle, which unit includes a heat processing means (46) which is capable of being in a heat exchange relation with the battery of the vehicle, in which the heat processing means is in a heat exchange relation with the air conditioning loop.