Heating/Air-Conditioning Installation With External And Contiguous Condenser And Evaporator For Heating The External Evaporator

Abstract

A heating/air-conditioning installation (IC) comprises a compressor (CP) capable of heating and pressurizing a refrigerant, an internal condenser (CDI) capable, in heating mode, of contributing towards the heating of an air known as interior air by exchange with the refrigerant coming from the compressor (CP), an external pressure reducer (DTE) capable, in heating mode, of cooling the refrigerant, and an external evaporator (EE) capable, in heating mode, of heating up the refrigerant coming from the external pressure reducer (DTE) by exchange of heat with an air known as exterior air to feed into the compressor (CP). This installation (IC) further comprises an external condenser (CDE) contiguous with the external evaporator (EE) and capable, in heating mode, of collecting the refrigerant coming from the internal condenser (CDI) to feed the external pressure reducer (DTE) and constitute a heat source for the contiguous external evaporator (EE), so as to reduce the probability of the latter (EE) icing up in the presence of exterior air at a low temperature.

1 . A heating/air conditioning system comprising a compressor (CP) adapted to heat and pressurize a refrigerant fluid, an internal condenser (CDI) capable, in a heating mode, to contribute to the heating of interior air by exchange with said refrigerant fluid coming from said compressor (CP), an internal pressure reducer (DTE) capable, in a heating mode, to cool said refrigerant fluid coming from said external pressure reducer (DTE) by exchange with exterior air to feed said compressor (CP), characterized in that it further comprises an external condenser (CDE) that is contiguous with said external evaporator (EE) which is capable, in a heating mode, of collecting said refrigerant fluid coming from said internal condenser (CDI) to feed said external pressure reducer (DTE) and constitute a heat source for said contiguous external evaporator (EE), in such a manner as to reduce the probability that the external evaporator (EE) will ice up in the presence of exterior air that presents a low temperature. 
     
     
         2 . The system according to  claim 1 , characterized in that said external condenser (CDE) and said external evaporator (EE) make up two contiguous sub-units of a single heat exchanger. 
     
     
         3 . The system according to  claim 1 , characterized in that said external condenser (CDE) and said external evaporator (EE) make up two independent and contiguous heat exchangers. 
     
     
         4 . The system according to  claim 1 , characterized in that it said system comprises an internal pressure reducer (DTI) capable, in a cooling mode, to cool said refrigerant fluid, and an internal evaporator (EI) capable, in a cooling mode, to cool said interior air by exchange with said refrigerant fluid coming from said internal pressure reducer (DTI). 
     
     
         5 . The system according to  claim 4 , characterized in that said external condenser (CDE) is capable, in a cooling mode, to pre-cool said refrigerant fluid coming from said compressor (CP) by exchange with said exterior air, so as to feed said internal pressure reducer (DTI) with pre-cooled refrigerant fluid. 
     
     
         6 . The system according to  claim 1 , characterized in that it said system includes a first three-way valve (V 1 ) including an inlet coupled with the outlet of said compressor (CP), a first outlet coupled with the inlet of said internal condenser (CDI) and a second outlet coupled with a first inlet/outlet of said external condenser (CDE). 
     
     
         7 . The system according to  claim 6 , characterized in that it the system includes a second three-way valve (V 2 ) including an inlet coupled with an outlet of said internal condenser (CDI), an outlet coupled with the inlet of said internal evaporator (EI), and an inlet/outlet coupled with a second inlet/outlet of said external condenser (CDE). 
     
     
         8 . The system according to  claim 7 , characterized in that it contains a third three-way valve (V 3 ) including a first inlet coupled with a second outlet of said first valve (V 1 ), an outlet coupled to the inlet of said external pressure reducer (DTE), and an inlet/outlet coupled with said first inlet/outlet of said external condenser (CDE). 
     
     
         9 . The system according to  claim 8 , characterized in that the system includes a fourth three-way valve (V 4 ) including a first inlet coupled with the outlet of said internal evaporator (EI), a second inlet coupled with the outlet of said external evaporator (EE), and an outlet coupled with the inlet of said compressor (CP). 
     
     
         10 . The system according to  claim 1 , characterized in that said internal condenser (CDI) is capable, in a heating mode, to heat said interior air by exchange with said refrigerant fluid coming from said compressor (CP). 
     
     
         11 . The system according to  claim 1 , characterized in that said internal condenser (CDI) is capable, in a heating mode, to heat, by exchange with said refrigerant fluid coming from said compressor (CP), a heat transfer fluid destined to feed a dedicated air heater (AR) to heat said interior air by thermal exchange. 
     
     
         12 . A vehicle characterized in that it includes a heating/air conditioning system, said heating/air conditioning system comprising a compressor (CP) adapted to heat and pressurize a refrigerant fluid, an internal condenser (CDI) capable, in a heating mode, to contribute to the heating of interior air by exchange with said refrigerant fluid coming from said compressor (CP), an internal pressure reducer (DTE) capable, in a heating mode, to cool said refrigerant fluid coming from said external pressure reducer (DTE) by exchange with exterior air to feed said compressor (CP), characterized in that it further comprises an external condenser (CDE) that is contiguous with said external evaporator (EE) which is capable, in a heating mode, of collecting said refrigerant fluid coming from said internal condenser (CDI) to feed said external pressure reducer (DTE) and constitute a heat source for said contiguous external evaporator (EE), in such a manner as to reduce the probability that the external evaporator (EE) will ice up in the presence of exterior air that presents a low temperature.