Device for heating/air-conditioning of the passenger compartment of a motor vehicle

• US 20020014330A1
• Filed: 07/30/2001
• Published: 02/07/2002
• Est. Priority Date: 07/28/2000
• Status: Abandoned Application

• Current Assignee: Valeo Climatisation
• Original Assignee: Valeo Climatisation
• Inventors: Guyonvarch, Gwenael
• Application Number:
  US09/916,259
• Publication Number:
  US 20020014330A1
• Time in Patent Office: Days
• US Class Current: 165/202
• CPC Class Codes: B60H 1/00007 Combined heating, ventilating, or cooling devices control systems or mechanisms B60H1/00642
• CPC Class Codes: B60H 1/00885 Controlling the flow of heating or cooling liquid, e.g. valves or pumps B60H1/00899 takes precedence; constructions of valves B60H1/00485
• CPC Class Codes: B60H 1/00899 Controlling the flow of liquid in a heat pump system controlling the properties of the refrigerant liquid, e.g. pressure or temperature, B60H1/3204
• CPC Class Codes: B60H 1/32284 comprising two or more secondary circuits, e.g. at evaporator and condenser side
• CPC Class Codes: B60H 2001/00928 comprising a secondary circuit
• CPC Class Codes: F25B 2309/061 with cycle highest pressure above the supercritical pressure
• CPC Class Codes: F25B 2339/047 Water-cooled condensers
• CPC Class Codes: F25B 9/008 the refrigerant being carbon dioxide

Abstract

The device of the invention comprises a closed circuit (10) in which a refrigerant fluid circulates between an evaporator (12) and a condenser (14) which are respectively in thermal contact with a cold-liquid duct (22) and a hot-liquid duct (24). Changeover-switching means (34, 36) put these two ducts into communication either with a first loop (26) travelled by a liquid and containing a heat exchanger (28) capable of being swept by an airflow (F1), or with a second loop (38) travelled by a liquid and comprising a heat exchanger (42) suitable for being swept by an airflow (F2) to be sent into the passenger compartment (H) . The heat exchanger (42) of the second loop (38) can thus heat up or cool the airflow (F2).

Claims

1. Device for heating/air-conditioning of the passenger compartment of a motor vehicle, characterised in that it comprises, in combination:

a closed circuit in which a refrigerant fluid circulates between an evaporator and a condenser;

a cold-liquid duct (22) , called “

cold duct”

, in thermal contact with the evaporator (12), and a hot-liquid duct (24) , called “

hot duct”

, in thermal contact with the condenser (14);

a first loop (26) travelled by a liquid under the action of a pump (32) and comprising a heat exchanger (28) suitable for being swept by a heat-carrying fluid, especially by an airflow (F1);

a second loop (38) travelled by a liquid under the action of a pump (40), and comprising a heat exchanger (42) suitable for being swept by an airflow (F2) to be sent into the passenger compartment (H); and

changeover-switching means comprising two four-way valves (34, 36) , interposed between the cold duct, the hot duct, the first loop and the second loop, and capable of being placed selectively either into a heating position in which the first loop (26) is in communication with the cold duct (22), while the second loop (38) is in communication with the hot duct (24), or into a cooling position in which the first loop (26) is in communication with the hot duct (24), while the second loop (38) is in communication with the cold duct (22).

2. Device according to claim 1, characterised in that the changeover-switching means comprise two mixer valves.

3. Device according to claim 1, characterised in that it comprises a module (20) which includes the refrigerant-fluid closed circuit (10), as well as the cold duct (22) and the hot duct (24).

4. Device according to claim 1, in which the refrigerant-fluid closed circuit (10) further comprises a compressor (16), characterised in that this compressor is electric.

5. Device according to claim 1, characterised in that it comprises a blower (44) associated with the heat exchanger (42) of the second loop (38) for sending into the passenger compartment (H) an airflow (F2) having swept over this heat exchanger.

6. Device according to claim 1, characterised in that it further comprises an additional radiator (46) suitable for being heated by the engine (M) of the vehicle, the said additional radiator being arranged in proximity to the heat exchanger (42) of the second loop in such a way as to be traversed by the same airflow (F2) sent into the passenger compartment (H).

7. Device according to claim 1, characterised in that the second loop (38) additionally comprises at least one supplementary heat exchanger (48, 52) travelled by the same liquid.

8. Device according to claim 7, characterised in that the supplementary heat exchanger (48) is integrated into a seat (50) of the vehicle.

9. Device according to claim 7, characterised in that the supplementary heat exchanger (52) is integrated into a panel (54).

10. Device according to claim 1, characterised in that the heat exchanger (28) of the first loop (26) is separate from the radiator for cooling the engine (M) of the vehicle.