Blower moduleThe present invention relates to a kind of blower module especially for the air-conditioning equipment in vehicle, this blower module has: pressure improves spiral, and it radially is enclosed in first draught fan impeller on the fan propeller at least in part; And motor, it drives fan propeller.
Background technique
In order to carry out air conditioning, raising travelling comfort and driving safety, the passenger compartment in vehicle ventilates through ventilation system, on this ventilation system, connects heating equipment and/or air-conditioning equipment.In order to carry the air in passenger compartment, on ventilation system, connect blower module, this blower module is drawn fresh air and is guided it to pass through heating equipment or air-conditioning equipment from the external environment condition of vehicle, so that make the air of being drawn reach temperature desired.Through the vehicle interior compartment flow air mostly via air course portion, for example on after-frame, from vehicle interior compartment, derive through the wheel case.
The blower module that is connected on the ventilation system constitutes the radial compression device usually, and this radial compression device drives through motor.At this, motor is integrated in the blower module with its make.For to motor, at first it is cooled off at the element that faces a danger aspect the temperature, for example coil or magnet, air is told from the air stream that is used for vehicle interior compartment that has compressed usually, to be used to cool off purpose.Its shortcoming is: the operation point of blower module receives negative image with its efficient.Particularly when critical operation point, for example when blower module during by over-blowing (ü berblasen), motor can not obtain enough cooling airs with its element that aspect temperature, faces a danger.Said " over-blowing " of blower module is interpreted as following situation, and the pressure that promptly can produce through blower module is less than the pressure reduction that between the entrance and exit of blower module, exists.This working state occurs under following situation, and promptly vehicle is opened with high travelling speed motion and/or glass for vehicle window largely.If vehicle at full speed moves, then at the pressure of the ingress of blower module owing to higher travelling speed has been enhanced.The pressure that has caused in vehicle interior compartment of opening of glass for vehicle window reduces.This has caused that the pressure reduction that exists at the entrance and exit place of blower module becomes big, and blower module entering over-blowing state, as long as pressure reduction is greater than the pressure through blower module produced.The over-blowing state has caused for blower module: although yet improved the cooling air flow content that the load motor only comprises minimizing.This can cause the element that aspect temperature, faces a danger overheated of motor.
Disclosure of the present invention
The objective of the invention is to: a kind of blower module is provided, even this blower module is designed in critical operation point, also supply with the enough air that are used to cool off to motor.
Said purpose realizes through blower module according to claim 1.Preferred embodiment provides in the dependent claims.
Can recognize according to the present invention: can avoid the element over-temperature that aspect temperature, faces a danger of the motor of blower module in the following manner, promptly blower module has a kind of suction unit, and this suction unit is designed to cooling air is transported in the motor.
Through being used for cooling air is transported to the suction means of motor, motor irrespectively cools off with the operation point of fan electromotor as far as possible, thereby even under the over-blowing state of blower module, still can avoid the overheated of critical element, for example coil or magnet.At this, cooling air flow as far as possible with the operation point decoupling of blower module.
According to one embodiment of the present invention; The suction unit of fan propeller has second draught fan impeller; This second draught fan impeller is designed to form cool cycles, and said cool cycles improves spiral from said pressure and begins to make cooling air to carry again through said pressure raising spiral via said motor.Its advantage is: motor can drive with high rotational speed, thereby has improved the mass flow that blower module is carried of passing through of air stream.
According to an embodiment of the present, said suction unit be designed to by said second draught fan impeller make cooling air via improve at said fan propeller and pressure between the spiral crack portion through exist below the said fan propeller, be pumped to second draught fan impeller at the coil of said motor and the fan inner room on the magnet.At this; A kind of guiding geometrical construction is being arranged to make cooling air flow above said second draught fan impeller, so to turn above said second draught fan impeller, make cooling air flow be directed getting back to said pressure radially outwardly through said first draught fan impeller and improve in the spiral.By this way; Not having compressed air to improve spiral from said pressure is discharged from; Thereby blower module can be implemented with its maximum delivery power; And comparing with following blower module thus needs less structure space, and cooling air is come out by branch from the air of being carried in this blower module.
According to an embodiment of the present, first draught fan impeller, second draught fan impeller and fan propeller constitute integratedly.Its advantage is, first draught fan impeller, second draught fan impeller and fan propeller can be in manufacturing steps, for example make through plastic-blasting.
Set forth the present invention in detail by accompanying drawing below.Wherein show:
Fig. 1 shows along rotor axis and passes the schematic sectional view according to blower module of the present invention;
Fig. 2 shows the schematic three-dimensional cross-sectional figure according to the fan propeller of blower module of the present invention;
Fig. 3 shows the plan view according to the downside of the fan propeller of blower module of the present invention; With
Fig. 4 shows the plan view according to the upside of the fan propeller of blower module of the present invention.
Fig. 1 shows the sectional view that passes a kind ofblower module 13 along rotor axis 20.Cooling air flow representes that by arrow wherein flow direction illustrates through the direction of arrow in this accompanyingdrawing.Blower module 13 hashousing 10, and this housing radially comprises the parts of blower module 13.Thehousing 10 ofblower module 13 can be fixed in the vehicle by means of permanent opening 11.The pressure that has the chamber shape onhousing 10 its inner peripheral surface improvesspiral 1, and this pressure improves spiral and receives the air stream from the acceleration of first draught fan impeller 14.The central axis ofhousing 10 is arranged on therotor axis 20.
In addition, themotor 24 thatfan propeller 9 and being used fordrives fan propeller 9 is set on rotor axis 20.Motor 24 constitutes the external movement part, and whereincoil 7 is arranged on the stator 8.Stator 8 has thebearing 25 that is used forfan propeller 9rotor shafts 21 for one or two in theinboard.Fan propeller 9 constitutes and utilizes a plurality ofmagnets 6 of receivingportion 12encirclement motors 24 with bell mode at downside.Heart is directed passing stator 8 and supports by twobearings 25 in the rotor shaft 21.With respect to the receiving portion that is used formagnet 6 12,fan propeller 9 forms faninner room 2 with thehousing 10 under the bell profile offan propeller 9 at outer circumferential side.
Faninner room 2 improvesspiral 1 through thefirst crack portion 23 with pressure and is connected.Seconddraught fan impeller 4 is installed in the zone of the top offan propeller 9 receiving portion.Above second draught fan impeller 4-this second draught fan impeller is connected withfan propeller 9 one, a kind of guiding geometrical construction 5 is arranged on the rotor shaft 21.At this, said guiding geometrical construction 5 reaches in the zone of firstdraught fan impeller 14 in its exterior contour.Firstdraught fan impeller 14 is designed to the radial compression device and integrally is connected with fan propeller 9.Thehousing 10 ofblower module 13 utilizes its side that is open upwards and the last rib that sealinglip 22encirclement fan propellers 9 above that are set.The motor offan propeller 9 haselectric contact 18 on the downside ofhousing 10, this electric contactutilization grafting zone 19 contacts.
When rotated,fan propeller 9 utilizes firstdraught fan impeller 14 that the upside of air fromhousing 10 is drawn onto the blower module 13.Through rotation, the outer channeling conduct of air flow and radially being accelerated.Improve in thespiral 1 if air stream arrives pressure, the pressure that then dynamically exists converts static pressure to.The rotating speed of motor regulating equipment of the driver through vehicle or the ventilation equipment through vehicle is usually controlled.Air stream improvesspiral 1 from pressure and is directed into the vaporizer or heating installation of the equipment that is connected on the ventilation unit, for example air-conditioning equipment through unshowned interface.
When rotating speed of motor is higher, motor on (temperaturkritisch) element that faces a danger aspect its temperature, for example on coil or magnet, need the cooling.This cooling realizes in the following manner: wherein air stream is directed into the faninner room 2 that is arranged infan propeller 9 belows through thefirst crack portion 23 from pressure raising spiral 1.Air stream passes betweenmagnet 6 andcoil 7 therefrom through seconddraught fan impeller 4 and upwards draws.Draw through seconddraught fan impeller 4, air stream turns to along its flow direction through the said guiding geometrical construction 5 that is positioned at second draught fan impeller, 4 tops.At this, air stream is transported in the zone of firstdraught fan impeller 14 through thesecond crack portion 17 between the profile of guiding geometrical construction 5 and fan propeller 9.Firstdraught fan impeller 14 makes heated air stream improve in thespiral 1 with being pumped back into pressure again from the new air stream of drawing in the external environment condition of vehicle.
In addition, the air stream that is used formotor 24 is cooled off and the operation point of firstdraught fan impeller 14 are irrespectively throughmotor 24 guiding.By this way, even cooling still can realize when the power offan propeller 9 declines to a great extent reliably.Particularly, draw cooling air, even under the over-blowing state, still can guarantee reliable cooling formagnet 6 andcoil 7 through improving thespiral 1 from pressure.Because do not have air to discharge for the compressed air stream thatmotor 24 cools off from being used for, so improved the efficient of blower module 13.Axial ventilator through seconddraught fan impeller 4 arranges, and the operation point irrespectively provides at the pressure reduction between the chamber above the fan inner room and seconddraught fan impeller 4, thereby makes air flow cross the element that faces a danger of motor.
Fig. 2 shows the schematic three-dimensional cross-sectional figure according to thefan propeller 9 ofblower module 13 of the present invention, and whereinfan propeller 9 is not illustrated in themagnet 6 of theblower module 13 shown in Fig. 1 in thisembodiment.Magnet 6 is arranged in the receivingportion 12 along circumference in the inboard in fan propeller 9.In addition,rotor shaft 21 stretches out fromfan propeller 9 atdownside.Rotor shaft 21 is surrounded and is fixed on there on thefan propeller 9 byfan propeller 9 in the zone of second draught fan impeller 4.Onrotor shaft 21, after seconddraught fan impeller 4, be provided for the said guiding geometrical construction 5 that air stream is turned to equally.
Firstdraught fan impeller 14, seconddraught fan impeller 4, receivingportion 12 andfan propeller 9 constitute integratedly in this embodiment and are made of plastics.Especially a kind of plastic-blasting method is suitable for the manufacturing of integral type.For the centrifugal force for the magnet in receivingportion 12 6 supports, receivingportion 12 has supportingelement 16 radially on its outside.Supportingelement 16 has been guaranteed: receivingportion 12 can not be bent upwards under the situation of the rotating speed that improves, therebymagnet 6 has uniform distance to thecoil 7 of stator 8.
Fig. 3 shows the plan view according to the downside of thefan propeller 9 ofblower module 13 of the present invention, and Fig. 4 shows the plan view of upside.Thefan propeller 9 that one constitutes has seconddraught fan impeller 4 that is designed to three pieces type, and this second draught fan impeller is arranged in the upper area of bell downside of fan propeller 9.But draught fan impeller can also have the fan blade of other quantity, and this fan blade is to those skilled in the art according to the air quantity needs and in shape with quantitatively mate.In addition, seconddraught fan impeller 4 has thereceiving portion 23 that is used for rotor shaft 21.Equally, the supportingelement 16 that is used for motormagnet receiving portion 12 is arranged on the downside ofblower module 9.
Certainly following manner is common to those skilled in the art: the guiding of air ventilation passing throughfan module 13 is exemplary; Yet at this importantly: the element that faces a danger aspect motor and its temperature cools off through cooling air, and this cooling air is carried by motor through suction means viablower module 13 individually.