摘要:
The subject of the invention is a device (5) for expanding a refrigerant fluid comprising, on the one hand, a first inlet (8) of the expansion device and a first outlet (9) of the expansion device which are connected by a first refrigerant circulation duct (11), the first refrigerant circulation duct (11) comprising an upstream part (22) and a downstream part (25) which parts are placed in communication by a first communication passage (18) and, on the other hand, a second inlet (12) of the expansion device and a second outlet (13) of the expansion device which are connected by a second refrigerant circulation duct (14). The expansion device (5) comprises a regulating means (15) that regulates an expansion of the refrigerant fluid and comprises a first needle valve (16) housed inside the upstream part (22) of the first refrigerant flow duct (11), the first needle valve (16) being connected by a first connecting rod (19) to a thermostatic sensor (17) in communication with the second refrigerant flow duct (14), the first needle valve (16) being able to allow or prevent refrigerant fluid from circulating through the first communicating passage (18). The regulating means (15) comprises a measurement means (23) for measuring the pressure of the refrigerant fluid entering the evaporator (Pse) which pressure measurement is taken at the first outlet (9) of the expansion device.
摘要:
Evaporator, notably for motor vehicle air-conditioning circuit. According to the invention, the evaporator (1), which comprises three layers—upstream (2), intermediate (3) and downstream (4)—through which there flows a coolant that enters the evaporator (1) via the intermediate layer (3) and leaves the evaporator via the upstream layer (2) to cool an air flow (A) passing in succession across said upstream (2), intermediate (3) and downstream (4) layers, comprises means (5E) for inducing a pressure drop between the outlet of the intermediate layer (3) and the inlet of the downstream layer (4).
摘要:
Evaporator, notably for motor vehicle air-conditioning circuit. According to the invention, the evaporator (1), which comprises three layers—upstream (2), intermediate (3) and downstream (4)—through which there flows a coolant that enters the evaporator (1) via the intermediate layer (3) and leaves the evaporator via the upstream layer (2) to cool an air flow (A) passing in succession across said upstream (2), intermediate (3) and downstream (4) layers, comprises means (5E) for inducing a pressure drop between the outlet of the intermediate layer (3) and the inlet of the downstream layer (4).
摘要:
The invention relates to a command device (13) of a fixed capacity compressor (9) associated with an evaporator through which an air flow passes in an air flow direction (6). The compressor (9) and the evaporator (12) are participating to an A/C loop (8) of an heating, ventilating and/or air conditioning device of a vehicle. The said command device (13) comprises a sensor (15,16) for the measurement of a measured value VM of a characteristic C of a fluid FR,A and comparison means (14) of the measured value VM of the characteristic C of the fluid FR,A with at least two step-values VSmin, VSmax of the characteristic C. The said command device (13) comprises an upstream temperature sensor (20) to be positioned upstream the evaporator (12) according to the air flow direction (6) to measure an upstream temperature T2 of the air flow (3) and give an information (18) which is taken into account by the said command device (13) in order to determine the said step-values VSmin, VSmax of the characteristic C.
摘要:
A heat exchanger for a heat transfer fluid circuit comprising ducts for the circulation of the heat transfer fluid, which are inserted between an inlet and an outlet, is described. Cavities designed to contain a heat storage fluid adjacent to the cooling fluid circulation ducts and associated with heat-exchanger surfaces, so that heat storage fluid is capable of exchanging heat with the air flow, if the circulation of the heat transfer fluid is stopped, are also described.
摘要:
A device for expanding a refrigerant fluid has a first inlet and a first outlet which are connected by a first refrigerant circulation duct. The first refrigerant circulation duct has an upstream part and a downstream part which parts are placed in communication by a first communication passage. The device also has a second inlet and a second outlet which are connected by a second refrigerant circulation duct. The device regulates an expansion of the refrigerant fluid and has a first needle valve housed inside the upstream part of the first refrigerant flow duct connected by a first connecting rod to a thermostatic sensor in communication with the second refrigerant flow duct that allows or prevents refrigerant fluid from circulating through the first communicating passage. The device also measures the pressure of the refrigerant fluid entering the evaporator (Pse) which pressure measurement is taken at the first outlet.
摘要:
Heat exchanger with thermal inertia for a heat transfer fluid circuit, particularly of a motor vehicle A heat exchanger for a heat transfer fluid circuit comprising ducts for the circulation of the heat transfer fluid, which are inserted between an inlet and an outlet, is described. Cavities designed to contain a heat storage fluid adjacent to the cooling fluid circulation ducts and associated with heat-exchange surfaces, so that heat storage fluid is capable of exchanging heat with the air flow, if the circulation of the heat transfer fluid is stopped, are also described.
摘要:
The invention relates to a ventilation, heating and/or air conditioning equipment for the passenger compartment of a motor vehicle provided with a main thermodynamic loop comprising at least, according to the direction of flow of a refrigerant fluid: a compressor (14), a condenser (16), an expansion device (20), and a main air-cooling evaporator (22). According to the invention, the equipment furthermore comprises a secondary fluid loop for the flow of a heat conductor fluid coupled with the main thermodynamic loop in order to cool the heat conductor fluid when this is desirable.
摘要:
A command device (13) includes a sensor (15,16) for the measurement of a measured value VM of a characteristic C of a fluid FR,A and a comparison (14) of the measured value VM of the characteristic C of the fluid FR,A with at least two step-values VSmin, VSmax of the characteristic C. The command device (13) includes an upstream temperature sensor (20) to be positioned upstream the evaporator (12) according to the air flow direction (6) to measure an upstream temperature T2 of the air flow (3) and give an information (18) which is taken into account by the command device (13) in order to determine the step-values VSmin, VSmax of the characteristic C.
摘要:
The invention relates to a heating, ventilating and/or air conditioning device (1) comprising an A/C loop (6) inside which a refrigerating fluid FR circulates and a secondary loop (10) inside which a cooling fluid FC circulates. The said device (1) comprising a first heat exchanger (8) between the refrigerating fluid FR and the cooling fluid FC, a second heat exchanger (9) between the refrigerating fluid FR and the cooling fluid FC. The secondary loop comprises a third heat exchanger (14) between the cooling fluid FC and the air, and a fourth heat exchanger (15) between the cooling fluid FC and the air. The secondary loop (10) comprises derivation means (22) of the cooling fluid FC from an outlet point (21) of the cooling fluid FC outside the third heat exchanger (14) and an inlet point (23) of the cooling fluid FC inside the fourth heat exchanger (15).