FR3043948A1 - MOTOR FAN GROUP AND INSTALLATION FOR VENTILATION, HEATING AND / OR AIR CONDITIONING - Google Patents

Abstract

The invention relates to a motor-fan unit (24) comprising: - an electric motor (28), and - a radial turbine (30) intended to be mounted in a casing (4) of a ventilation system (2), heating and / or air conditioning of a motor vehicle, characterized in that said motor-fan unit (24) further comprises a pump (38) intended to be installed in a loop (26) of heat transfer fluid of said installation (2) ventilation, heating and / or air conditioning, and in that said same electric motor (28) is adapted to rotate said radial turbine (30) and said pump (38).

Description

Fan motor unit and ventilation, heating and / or air conditioning system

The present invention is in the field of ventilation, heating and / or air conditioning of a motor vehicle.

In particular, the present invention can be implemented in electric or hybrid vehicles.

A motor vehicle, in particular an electric or hybrid motor vehicle whose propulsion is at least partially provided by an electric motor, is commonly equipped with a ventilation, heating and / or air conditioning system to modify the aerothermal parameters of the passenger compartment of the vehicle. by delivering a flow of conditioned air inside the passenger compartment. The ventilation, heating and / or air conditioning installation generally comprises a casing provided with an air intake inlet and an air discharge outlet, a motor-fan unit capable of circulating the air. air between the inlet and the outlet of the housing, an air conditioning loop inside which circulates a refrigerant clean to cool at least a portion of the air flowing in the housing and a heat transfer fluid loop inside which circulates a coolant clean to heat the air circulating in the housing. The heat transfer fluid is driven in displacement in the heat transfer fluid loop by a centrifugal pump type pump driven in rotation by a motor.

However, such an installation is expensive.

An object of the present invention is to provide a motor-fan unit to reduce the manufacturing costs of the ventilation system, heating and / or air conditioning, while maintaining all the comfort functions performed by this installation. For this purpose, the present invention proposes a motor-fan unit comprising an electric motor and a radial turbine intended to be mounted in a housing of a ventilation, heating and / or air-conditioning system of a motor vehicle, characterized in that said fan motor unit further comprises a pump intended to be installed in a heat transfer fluid loop of said ventilation, heating and / or air conditioning system, and in that said same electric motor is adapted to drive in rotation said radial turbine and said pump.

Advantageously, the use of a single motor to drive both the radial turbine and the pump can significantly reduce the manufacturing costs of the ventilation system, heating and / or air conditioning of a motor vehicle.

According to particular embodiments, said fan motor unit comprises one or more of the following characteristics: said electric motor has a first output shaft and a second output shaft, said pump being provided with a rotationally integral drive shaft; said first output shaft, said radial turbine comprising a hub fixed on said second output shaft. said fan motor unit comprises a clutch device capable of decoupling the drive shaft from said pump and said first output shaft. said fan motor unit comprises a gearbox mounted on said first output shaft for reducing the driving speed of said pump. said electric motor has a single output shaft, said pump being provided with a drive shaft integral in rotation with said output shaft, said radial turbine comprising a hub fixed on said output shaft. said pump is a centrifugal pump. The invention also relates to a ventilation, heating and / or air conditioning installation of an air flow intended to equip a motor vehicle, said installation comprising: a casing having at least one air intake inlet and one outlet air discharge, a heat transfer fluid loop comprising an electric heater adapted to heat a heat transfer fluid and a heat exchanger traversed by said heat transfer fluid, said heat exchanger being housed in said housing to heat at least a portion of the air passing through said casing, characterized in that it comprises a said fan motor unit defined according to any one of claims 1 to 6, said pump being adapted to circulate said heat fluid in said heat transfer fluid loop, said turbine radial being housed in said housing to circulate air from the intake inlet to the discharge outlet. The use of such a motorcycle fan unit advantageously reduces the length of the heat transport fluid transport pipes and also to reduce the amount of coolant circulating in the heat transfer fluid loop.

By reducing the length of the heat transport fluid transport pipes, this motor-fan unit advantageously makes it possible to reduce the heat dissipation therein.

Advantageously, since the amount of heat transfer fluid of the ventilation, heating and / or air conditioning system according to the invention is reduced, this installation is more reactive and makes it possible to heat the vehicle interior more quickly. The use of such a motorcycle fan unit advantageously reduces the weight of the ventilation system, heating and / or air conditioning on the one hand by the use of a single engine, and on the other hand, by reducing the amount of heat transfer fluid required to operate the heat transfer fluid loop.

According to particular embodiments, said installation comprises one or more of the following characteristics: the heat transfer fluid loop comprises pipes containing said heat transfer fluid and said pipes are fixed against said casing. - At least a portion of said pipes is fixed on the inner face of the housing. - At least a portion of said pipes is fixed on the outer face of the housing. - The installation comprises at least one movably mounted flap in the housing upstream of the heat exchanger; said at least one flap being movable between an end position in which all of the air admitted passes through said heat exchanger and an opposite end position in which the admitted air circumvents said heat exchanger. The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the figures in which: FIG. 1 is a diagrammatic sectional view along a median plane of a example of a ventilation system, heating and / or air conditioning according to the present invention; FIG. 2 is a schematic view of a motor-fan unit according to a first embodiment of the invention; FIG. 3 is a schematic view of a motor-fan unit according to a variant of the first embodiment of the invention; and FIG. 4 is a schematic view of a motor-fan unit according to a second embodiment of the invention.

It should be noted that, in the figures, the structural and / or functional elements common to the various embodiments have the same references. Thus, unless otherwise stated, such elements have identical structural, dimensional and material properties. According to the present invention, the terms "downstream" and "upstream" describe the position of one component relative to another, according to the direction of flow of an air flow in a ventilation, heating and / or air conditioning system. according to the present invention.

Figure 1 shows an example of a ventilation system, heating and / or air conditioning 2 according to the present invention. This installation is intended to equip a motor vehicle.

This installation 2 comprises a casing 4 provided with an air intake inlet 6 opening generally towards the outside of the passenger compartment, a partition wall 8 delimiting a main duct 10 and a secondary duct 12, of a first 14 and a second 16 mixing flaps arranged upstream and downstream respectively of the partition wall 8, and one or more air discharge outlets 18 opening into the passenger compartment of the motor vehicle.

The first mixing flap 14 is mounted movably in the housing between an end position in which all of the air admitted into the casing 4 passes through the main duct 10 and an opposite end position in which all of the intake air in the housing 4 passes through the secondary duct 12. The first mixing flap 14 is, for example, a flag flap.

The second mixing flap 16 is mounted movably in the casing downstream of the main duct 10 and the secondary duct 12. It is suitable for mixing the hot air coming from the main duct with the cold air coming from the secondary duct 12. The second mixing flap 16 is, for example, a butterfly flap. The ventilation, heating and / or air conditioning installation comprises a filtration device 20 mounted in the casing downstream of the air intake inlet 6 and an evaporator 22 arranged in the casing downstream of the filtration device.

The filtration device 20 is able to filter the air coming from the air intake inlet 6. The evaporator 22 is able to cool the filtered air. The evaporator 22 is part of an air conditioning loop which further comprises a compressor, a condenser and a pressure regulator not shown. This air conditioning loop is traversed by a refrigerant fluid. The ventilation, heating and / or air conditioning system 2 furthermore comprises a motor-fan unit 24 and a heat-transfer fluid loop 26.

The motor-fan unit 24 comprises an electric motor 28 and a radial turbine 30 driven in rotation by the electric motor 28 to circulate the air from the inlet inlet 6 to the discharge outlet (s) 18.

The heat transfer fluid loop 26 comprises an electric heater 32 suitable for heating a heat transfer fluid, a heat exchanger 34 traversed by said heat transfer fluid, conduits 36 for transporting the coolant and a pump 38 for circulating the coolant in the heat transfer medium. loop.

The electric radiator 32 is, for example, a radiator with CTP heating elements. In the exemplary embodiment shown in FIG. 1, the electric radiator 32 is mounted on the outer face of the casing 4. The heat exchanger 34 is arranged in the casing 4 at the inlet of the main duct 10. It is clean to heat at least a portion of the air passing through said housing 4.

The pump 38 is, for example, a centrifugal pump. According to the present invention, it is rotated by the same motor 28 as the drive motor of the radial turbine 30. Thus, according to the present invention, a single electric motor 28 is used to drive in rotation the radial turbine 30 and for rotating the pump 38. The radial turbine 30 and the pump 38 are connected to the electric motor 28 to form an assembly.

According to the embodiment shown in FIG. 1, a part 35 of the coolant transport pipes is fixed on the inner face of the casing 4 and another part 37 of the pipes is fixed on the outer face of the casing 4.

Advantageously, the motor-fan unit according to the present invention makes it possible to reduce the length of the coolant transport pipes. As a result, the amount of heat transfer fluid circulating in the loop is reduced, the mass of the ventilation, heating and / or air conditioning system is advantageously reduced and the installation is more reactive and allows faster heating of the air.

According to a first embodiment of the invention illustrated in FIG. 2, the electric motor 28 has a first output shaft 40 and a second output shaft 42. The pump 38 is provided with a fixed drive shaft 44 in rotation of the first output shaft 40. The hub 46 of the radial turbine 30 is fixed on the second output shaft 42.

According to a variant of the first embodiment illustrated in FIG. 3, the fan motor unit 24 further comprises a clutch device 48 capable of decoupling the drive shaft from the pump 38 and a gearbox 50 mounted on said first shaft. output 40 to reduce the driving speed of said pump.

The clutch device 48 and the gearbox 50 are mounted between the first output shaft 40 of the electric motor and the drive shaft 44 of the pump.

According to a variant not shown, the fan motor unit 24 comprises only the electric motor 28, the radial turbine 30, the pump 28 and the clutch device 48.

According to another variant not shown, the motorcycle fan unit 24 comprises only the electric motor 28, the radial turbine 30, the pump 28 and the gearbox 50.

According to a second embodiment of the invention illustrated in FIG. 4, the motor-fan unit 52 comprises an electric motor 54 having a single output shaft 56, a pump 58 and a radial turbine 30 driven in rotation by the shaft output 56.

In this embodiment, the output shaft 56 of the electric motor 28 passes through the pump 58. The hub 46 of the radial turbine 30 is fixed to the output shaft 56.

Of course, the invention is not limited to the embodiments described above and provided solely by way of example. It encompasses various modifications, alternative forms and other variants that may be considered by those skilled in the art in the context of the present invention and in particular any combination of the different modes of operation described above, which can be taken separately or in combination.

Claims (11)

1Groupe motor-fan (24, 52) comprising: - an electric motor (28, 54), and - a radial turbine (30) intended to be mounted in a housing (4) of a ventilation system (2), heating and / or air conditioning of a motor vehicle, characterized in that said motor-fan unit (24, 52) further comprises a pump (38, 58) intended to be installed in a loop (26) of heat transfer fluid of said installation (2) ventilation, heating and / or air conditioning, and in that said same electric motor (28, 54) is adapted to rotate said radial turbine (30) and said pump (38, 58). 2, - motor-fan unit (24) according to claim 1, wherein said electric motor (28) has a first output shaft (40) and a second output shaft (42), said pump (38) being provided with a drive shaft (44) rotationally integral with said first output shaft (40), said radial turbine (30) comprising a hub (46) fixed on said second output shaft (42). 3. - motor-fan unit (24) according to claim 2, which comprises a clutch device (48) able to decouple the drive shaft (44) from said pump (38) and said first output shaft ( 40). 4, - motor-fan unit (24) according to any one of claims 2 and 3, which comprises a gear (50) mounted on said first output shaft (40) for reducing the driving speed of said pump (38). ). The motor-fan unit (52) according to claim 1, wherein said electric motor (54) has a single output shaft (56), said pump (58) and said radial turbine (30) being rotated by said output shaft (56). The motor-fan unit (24, 52) according to any one of claims 1 to 5, wherein said pump (28, 58) is a centrifugal pump. 7. - Installation (2) ventilation, heating and / or air conditioning of an air flow intended to equip a motor vehicle, said installation (2) comprising: - a casing (4) having at least one intake inlet of air (6) and at least one air discharge outlet (18), - a loop (26) of coolant comprising an electric heater (32) adapted to heat a coolant and a heat exchanger (34) traveled by said heat transfer fluid, said heat exchanger (34) being housed in said casing (4) for heating at least a portion of the air passing through said casing (4), characterized in that it comprises a motor-fan unit (24, 52) defined according to any one of claims 1 to 6, said pump (38, 58) being adapted to circulate said heat transfer fluid in said loop (26) of heat transfer fluid, said radial turbine (30) being housed in said housing (40) for circulating air of said at least one air inlet (6) to said at least one discharge outlet (18). 8. - Installation (2) ventilation, heating and / or air conditioning according to claim 7, wherein the loop (26) of heat transfer fluid comprises pipes (36) containing said heat transfer fluid and wherein said pipes (36) are fixed against said housing (4). 9. - Installation (2) ventilation, heating and / or air conditioning according to claim 8, wherein at least a portion (35) of said pipes are fixed on the inner face of the housing (4). 10. - Installation (2) ventilation, heating and / or air conditioning according to claim 8, wherein at least a portion (37) of said pipes are fixed on the outer face of the housing (4). 11. - Installation (2) ventilation, heating and / or air conditioning according to any one of claims 7 to 10, which comprises at least one mixing flap (16) movably mounted in the housing (4) upstream of the heat exchanger (34); said at least one mixing flap (16) being movable between an end position in which all the air admitted into the casing (4) passes through said heat exchanger (34) and an opposite extreme position in which the assembly air admitted into the housing (4) bypasses said heat exchanger (34).