Valeo Systemes Thermiques

Roland Akiki

Jin-Ming Liu

Mohamed Yahia

Bertrand Nicolas

Stefan Karl

Muriel Porto

Regis Beauvis

Rody El Chammas

Jinming Liu

Patricia Gardie

A method for controlling a thermal conditioning system is disclosed. The thermal conditioning system includes a refrigerant unit configured to circulate a refrigerant. The refrigerant circuit includes a main loop and a first bypass branch. The main loop includes a compression device, a first heat exchanger configured to exchange heat with a first heat transfer fluid, a first expansion device, and a first evaporator configured to exchange heat with an element of a powertrain of a motor vehicle via a second heat transfer fluid. The method includes determining a pressure of the refrigerant at the outlet of the first evaporator and controlling, depending on the determined pressure, at least one parameter so that the pressure of the refrigerant at the outlet of the first evaporator is below a predetermined pressure threshold.

Thermal conditioning system for a motor vehicle

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 (), susceptible to frosting, as well as second and third exchangers (), the second and third exchangers () being intended to exchange heat between the refrigerant and a heat transfer fluid, the loop further comprising a bottle () 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 (), the bottle () and then the first and third exchangers (), with cooling of the refrigerant in the first and second exchangers () and heating of the refrigerant in the third exchanger ().

Method for defrosting a thermal regulation circuit for a vehicle, in particular for a motor vehicle

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 ().

Growing community of inventors

Le Mesnil Saint Denis, France

Roland Akiki