Valeo Systemes Thermiques

Bertrand Nicolas

Mohamed Yahia

Stefan Karl

Jin-Ming Liu

Roland Akiki

Sylvain Moreau

Jugurtha Benouali

Jin Ming Liu

Francois Busson

Muriel Porto

Regine Haller

Régine Haller

Klaus Wittmann

Yvan Lechat

Abdelmajid Taklanti

Jean-Luc Thuez

Yulia Glavatskaya

Patricia Gardie

Samy Hammi

Laetitia Clemaron

A circuit for circulating refrigerant in a vehicle includes a main branch including a main heat exchanger comprising at least one inlet for refrigerant. The circuit further includes a first branch and a second branch that extend between a point of divergence and a point of convergence. The first branch includes a first compression device, a first expansion member and a first heat exchanger configured to thermally treat an electrical storage device of the vehicle. The second branch includes a second compression device, a second expansion member and a second heat exchanger configured to thermally treat a passenger compartment of the vehicle. The circuit further includes a high-pressure line that includes a first portion extending between an outlet of the first compression device and the inlet. The high-pressure line includes a second portion extending between an outlet of the second compression device and the inlet.

Coolant circuit of a vehicle adapted to fast charging of a storage device

A thermal conditioning system for a motor vehicle, including a refrigerant circuit including a main loop including in succession: a compression device; a first heat exchanger; a first expansion device; a second heat exchanger; a third heat exchanger; a refrigerant accumulation device. An inner volume of a portion of main loop extending from an outlet of the first heat exchanger to an inlet of the first expansion device defines a first reference volume. An inner volume of the accumulation device defines a second reference volume. The ratio of the first reference volume and the second reference volume is greater than 0.2.

Thermal conditioning system for a motor vehicle

A method for controlling a thermal regulation circuit of a vehicle. The circuit includes first and second heat exchangers situated in series in a direction in which an air flow is intended to pass through each heat exchanger. The circuit also includes an additional heat exchanger situated upstream of the first heat exchanger with respect to the air flow. The circuit is configured to allow a refrigerant fluid to circulate through the first exchanger and also configured to allow a heat-transfer fluid to circulate through the second exchanger and through the additional exchanger. The method includes generating or increasing a flow rate of the heat transfer fluid in the additional exchanger depending on operating modes of the circuit.

Coolant circuit for vehicle and method for controlling such a circuit

A thermal conditioning system including a heat-transfer circuit, a refrigerant circuit including successively: a compressor, a first bi-fluid exchanger and a second bi-fluid exchanger arranged jointly on the refrigerant circuit and on a main loop of the heat-transfer circuit, a first expansion valve, a third bi-fluid exchanger arranged jointly on the refrigerant circuit and on a secondary loop of the heat-transfer circuit, a first branch of the heat-transfer circuit being configured so that the heat-transfer liquid leaving the first bi-fluid exchanger returns to the first bi-fluid exchanger without passing through the second bi-fluid exchanger, and including a second heat exchanger configured to exchange with a second air flow. A second branch connects the first branch to the main loop, and includes a third heat exchanger configured to exchange with the second air flow.

Thermal conditioning system

A thermal regulation circuit for a vehicle includes a first heat exchanger, a second heat exchanger, and a third heat exchanger. The first and the second heat exchangers are situated in series such that an ambient air flow passes through the first heat exchanger prior to passing through the second heat exchanger. The ambient air flow also passes through the third heat exchanger. The thermal regulation circuit is configured to allow a refrigerant fluid to circulate through the first heat exchanger and then the third heat exchanger. The thermal regulation circuit is configured to allow a heat-transfer fluid to circulate through the second heat exchanger.

Refrigerant circuit for a vehicle, and method for controlling such a circuit

A temperature management system for a vehicle is disclosed. The temperature management system includes a refrigerant circuit and a heat transfer fluid loop. The refrigerant circuit includes a compression device, an expansion member, a first heat exchanger configured to exchange heat between the refrigerant and an air flow external to a vehicle interior, a second heat exchanger configured to exchange heat between the refrigerant and the heat transfer fluid circulating in the loop, and a fourth heat exchanger configured to exchange heat between the refrigerant and an air flow inside the vehicle interior. The heat transfer fluid loop includes, on a main line, the second heat exchanger and a primary radiator configured to exchange heat between the air flow external to the vehicle interior and the heat transfer fluid.

Heat treatment system for a motor vehicle

The invention concerns a method for managing a thermal management device () for a motor vehicle, comprising the following steps: —increasing the speed of rotation of the compressor () to its maximum speed, —determining a modified setpoint temperature (T-) of the third element () greater than the first setpoint temperature (T-), so that the temperature of the second element () at the outlet of the first evaporator () tends towards its setpoint temperature (T-), —adjusting the opening diameter of the second expansion device () so that the temperature of the third element () at the outlet of the second evaporator () reaches a modified setpoint temperature (T-), until the temperature of the second element () at the outlet of the first evaporator () reaches the setpoint temperature (T-). The invention further relates to the thermal management device () for implementing said management method.

Method for managing a thermal management device for a motor vehicle and associated thermal management device

The present invention relates to a reversible air-conditioning circuit () comprising: • a main loop (A) comprising a compressor () and a water condenser () jointly connected to an auxiliary circuit, a first expansion device (), an external evaporator-condenser (), a second expansion device (), and an evaporator (), • a first bypass branch (B) comprising an internal condenser (), the first bypass branch (B) connecting a first junction point () arranged downstream from the water condenser () to a second junction point () arranged upstream from the second expansion device (), • a second bypass branch (C) connecting a third junction point () arranged downstream from the external evaporator-condenser () to a fourth junction point () arranged downstream from the evaporator (), and • a third bypass branch (D) connecting a fifth junction point () arranged downstream from the third junction point () to a sixth junction point () arranged downstream from the first junction point ().

Motor vehicle air-conditioning circuit and related management method

The invention relates to a thermal conditioning circuit () for a hybrid or electric motor vehicle, in which a refrigerant can circulate, said circuit () comprising a compressor (), a condenser (), an evaporator-condenser (), an evaporator () and a heat exchanger () thermally coupled to an electric member, e.g. a vehicle electric battery, characterized in that the circuit is configured to operate at least in the following three modes in which the refrigerant can circulate in a cascade and successively:—via the condenser (), the evaporator-condenser () and the evaporator () in a first mode;—via the condenser (), the evaporator () and the evaporator-condenser () in a second mode; and—in another mode, i.e. a third mode, in which the evaporator () is arranged in parallel to the heat exchanger () and/or to the evaporator-condenser () such that the refrigerant can circulate in a cascade and successively via the condenser () and then via at least two of said elements () that are arranged in parallel.

Thermal conditioning circuit

A reversible thermal management device for a motor vehicle includes a refrigerant fluid circuit containing a main loop which has, successively, a compressor, an internal condenser, a first expansion device and an external evaporator/condenser. The device also has a three bypass branches. The third bypass branch has a heat exchanger. The device further includes a device for redirecting the refrigerant fluid coming from the internal condenser towards the first expansion device or the first bypass branch, a stop valve for the refrigerant fluid, arranged on the main loop, a first check valve arranged on the second bypass branch to block the refrigerant fluid coming from the internal condenser, a second check valve arranged on the main loop to block the refrigerant fluid coming from the evaporator/condenser, and a device for redirecting fluid coming from the first expansion device towards the heat exchanger of the third bypass branch or the evaporator/condenser.

Reversible thermal management device for a motor vehicle

Fluid circulation valve, the said valve comprising a housing () and a body () for circulation of fluid, the said body () being located at least partially within the said housing (), the said body () being attached to the housing () and having a passage () for fluid between the said body () and the said housing (), the said valve further comprising a control member () that can be actuated electromagnetically, the said control member () being able to move with respect to the said body () so as to selectively open or close the said passage (), the said body () having at least locally a tubular configuration at the said passage (), the said control member () being able to slide along the said body () at least at the said passage ().

Fluid circulation valve and thermal treatment system for a vehicle comprising such a valve

A thermal management circuit for a hybrid or electric vehicle is disclosed. The thermal management circuit has a first reversible air conditioning loop in which a refrigerant circulates and includes a two-fluid heat exchanger arranged jointly on a second loop for the circulation of a heat-transfer fluid. The second loop for the circulation of a heat-transfer fluid includes a first circulation branch including in the direction in which the heat-transfer fluid circulates, a first pump, a first radiator arranged in an internal air flow, and a battery heat exchanger. A second circulation branch is connected in parallel with the second radiator and includes a second pump and an electric device for heating the heat-transfer fluid. A third circulation branch connected in parallel with the first pump and the battery heat exchanger includes the two-fluid heat exchanger.

Circuit for the thermal management of a hybrid or electric vehicle

Evaporator, notably for motor vehicle air-conditioning circuit. According to the invention, the evaporator (), which comprises three layers&#x2014;upstream (), intermediate () and downstream ()&#x2014;through which there flows a coolant that enters the evaporator () via the intermediate layer () and leaves the evaporator via the upstream layer () to cool an air flow (A) passing in succession across said upstream (), intermediate () and downstream () layers, comprises means (E) for inducing a pressure drop between the outlet of the intermediate layer () and the inlet of the downstream layer ().

Multi-layer evaporator for motor vehicle air-conditioning circuit

The invention relates to a control process for an air conditioning system. The air conditioning system comprises a thermal loop () used as a heat pump and an electrical heating device (). The process calculates a global heating capacity (HCglo) in function of the temperature chosen by the passenger, the speed of the blower and the temperature of the exterior air. Then, the process calculates a heating capacity (HC) of the thermal loop () and compares this heating capacity (HC) of the thermal loop to the global heating capacity (HCglo). If the global heating capacity (HCglo) is superior to the heating capacity (HC) of the thermal loop, the process determines a heating capacity (HC) of the electrical heating device (). This heating capacity (HC) of the electrical heating device () added to the heating capacity (HC) of the thermal loop () allows to obtain the global heating capacity (HCglo) required in function of the temperature selected by the passenger.

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Paris, France

Bertrand Nicolas