Patent ID: 9732993
Date: 2017-08-15
CPC Classifications: B60H,F25B

Claim:
1. A refrigerant fluid circuit for thermally conditioning a cabin of a vehicle, comprising: a first branch in which are installed in series only one compressor, an interior exchanger designed to ensure thermal exchange between the refrigerant fluid and an interior air stream, and means for transporting the refrigerant fluid, to be dispatched into the cabin, a second branch in which are installed in series at least one first means of control of the circulation of the refrigerant fluid in said second branch, a first expansion member and an evaporator, a third branch in which are installed in series at least one second expansion member and an exterior exchanger designed to ensure thermal exchange between the refrigerant fluid and an exterior air stream, arranged outside the cabin, said first branch being in series with the second branch and the third branch, said second branch being in parallel with said third branch, wherein said first branch, said second branch and said third branch are hooked up with one another at a level of a point of convergence and at a level of a point of divergence, wherein said second branch and said third branch start with the point of divergence and terminate with the point of convergence, a means for placing the third branch in communication with the second branch, said means being installed between a sector of the third branch situated downstream of the exterior exchanger and a portion of the second branch situated upstream of the first expansion member, wherein the circuit is designed to operate according to a mode of heating, according to a mode of cooling, and according to at least three modes of dehumidification which combine the mode of heating and the mode of cooling, and in which a refrigerant fluid circulates in the same direction independent of the mode and wherein the circuit comprises means which are designed to: impose a circulation of refrigerant fluid in the first branch and in the third branch according to a heating mode, impose a circulation of refrigerant fluid in the first branch, in the third branch, in the means for placing the third branch in communication with the second branch, and in the second branch, according to a first mode of dehumidification, impose a circulation of refrigerant fluid in the first branch and in the second branch according to a second mode of dehumidification, impose a circulation of refrigerant fluid in the first branch and simultaneously in the second and the third branch according to a third mode of dehumidification.