EP2545282A1

EP2545282A1 - Blower module

Info

Publication number: EP2545282A1
Application number: EP11707821A
Authority: EP
Inventors: Cedric Handwerk; Tom Chapman
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2010-03-08
Filing date: 2011-03-03
Publication date: 2013-01-16
Also published as: DE102010002658A1; CN102844574A; WO2011110468A1; CN102844574B

Abstract

The invention relates to a blower module comprising a motor housing and a cover housing that can be connected to the motor housing. A motor can be disposed in the blower housing. The blower module comprises a substantially cylindrical outer surface. The blower module further comprises a cooling channel for cooling the motor. The cooling channel thereby comprises a first inlet, a second inlet, and an outlet. The first inlet and the second inlet are disposed in the cylindrical outer surface. A first section of the cooling channel runs from the first inlet along a first curve into the interior of the blower module. A second section of the cooling channel runs from the second inlet into the interior of the blower module.

Description

description

title

The invention relates to a fan module according to the preamble of patent claim 1 and to a fan according to the preamble of patent claim 6.

PRIOR ART Blower with blower modules, for example, for the air conditioning of

Passenger cells used by motor vehicles. Such blowers typically include rotors with rotor blades that produce airflow between an inlet of a blower duct of the blower and an outlet. The rotor is usually connected via a shaft to a motor which drives the rotor. This motor usually also requires cooling, which is why typically provided by an air-flow cooling channel is provided, which branches off from the fan duct.

When using the blower in a motor vehicle, there is a risk that moisture will penetrate into the blower. An advance of this moisture until the

Motor of the fan must be prevented. This can be achieved by suitable design of the cooling channel serving to cool the engine. WO 2007/089964 describes a fan whose cooling channel is designed such that moisture penetrating into the blower duct of the blower can not penetrate via the cooling duct to the motor of the blower.

Disclosure of the invention

The object of the present invention is to provide an improved fan module for a fan. This task is accomplished by a blower module with the

Characteristics of claim 1 solved. It is also the task of the present to provide an improved blower. This object is achieved by a blower with the features of claim 6. Preferred developments are specified in the dependent claims.

A fan module according to the invention comprises a motor housing and a cover housing which can be connected to the motor housing. In the fan module, a motor can be arranged. In this case, the fan module has a substantially cylindrical outer surface. In addition, the fan module has a cooling channel for cooling the engine. The cooling passage has a first inlet, a second inlet and an outlet, wherein the first inlet and the second inlet are disposed in the cylindrical outer surface. A first portion of the cooling passage extends from the first inlet into the interior of the fan module. A second portion of the cooling passage extends from the second inlet into the interior of the fan module. Advantageously, this fan module can be combined with a rotor which rotates either clockwise or counterclockwise. This makes the fan module universally applicable.

Preferably, the first portion of the cooling passage from the first inlet along a first curve into the interior of the fan module and the second portion of the cooling channel from the second inlet along a second curve in the interior of the fan module. In this case, the first curve and the second curve have opposite curvatures.

Preferably, the first inlet and the second inlet are arranged between the motor housing and the cover housing. Advantageously, this results in a particularly simple design of motor housing and cover housing. This makes it possible to produce the motor housing and the cover housing by injection molding particularly cost.

Also preferably, the fan module is mirror-symmetrical with respect to a plane passing between the first inlet and the second inlet and through the center of the fan module. Advantageously, the fan module can then be combined not only with left- or right-handed rotors, but can be used as a whole unchanged in blowers of both directions of rotation. This leads to a cost savings. It is expedient if the motor housing has an opening through which a shaft can be guided, and the opening simultaneously forms the outlet of the cooling channel. Advantageously, a motor arranged in the blower module can then be cooled by an air flow passing through the engine. It is also advantageous that the motor housing must then have no further openings.

A fan according to the invention comprises a fan module, a motor arranged in the fan module, a rotor, which is connected to the motor via a shaft, and a fan housing. In this case, the blower module is formed according to the above description. Advantageously, the motor may drive the rotor in this fan clockwise or counterclockwise.

In a preferred embodiment of the blower, a blower duct is arranged in the blower housing, wherein the first inlet and the second inlet are located in a pressure range of the blower duct. Advantageously, then automatically adjusts the motor cooling air flow through the cooling channel.

Preferably, a circumferential lip seal is formed between the fan module and the fan housing, which is formed in sections by the motor housing and partially by the cover housing of the fan module. Advantageously, this lip seal reduces air leakage between the fan module and the blower housing.

The invention will now be explained in more detail with reference to the accompanying figures. Show it:

Figure 1 is a section through a blower;

Figure 2 is a perspective view of a partially opened fan; FIG. 3 shows a section through a fan module;

Figure 4 is a perspective view of the fan module with a rotor; Figure 5 is a plan view of a motor housing; Figure 6 is a plan view of a lid housing; and

Figure 7 is a perspective view of the cover housing.

1 shows a sectional view of a blower 100. The blower 100 can be used for example in a motor vehicle for air conditioning of the passenger compartment. The blower 100 serves to draw in air through a blower inlet 310 and to transport it through a blower duct 300 to a blower outlet 320 where the air is blown out. The blower outlet 320 can be arranged, for example, in the passenger compartment of the motor vehicle.

The fan 100 comprises a fan module 105. The fan module 105 consists of a cover housing 120 and a motor housing 130. The cover housing 120 and the motor housing 130 may be made of plastic, for example, and manufactured by means of an injection molding process.

Within the fan module 105, a not visible in Figure 1 engine 150 is arranged. The motor 150 may be, for example, an electric motor. The motor 150 rotates a shaft 160. The shaft 160 is connected to a rotor 140 disposed outside the fan module 105. The rotor 140 has a plurality of rotor blades 141 and can be rotated by the shaft 160. The fan module 105 and attached to the fan module 105 rotor 140 are arranged in an opening of a fan housing 1 10 that the rotor 140 is located within the fan housing 1 10 and the transition between the fan housing 1 10 and the fan module 105 by a lip seal 1 first 1 is sealed. The fan housing 1 10 forms the cooling channel 300 which surrounds the fan module 105 and the rotor 140 in a spiral shape. Rotation of the rotor 140 causes air to be sucked through the fan inlet 310 arranged on the front side to the rotor 140 in the fan housing 110 and transported through the fan duct 300 to the fan outlet 320 becomes. As a result of the pumping power of the rotor 140, in a pressure region 330 of the blower duct 300 following the rotor 140, a higher pressure prevails than in the surroundings of the blower, for example at the blower inlet 310. FIG. 2 shows the blower 100 in a perspective view. In this case, the blower housing 1 10 is partially open and gives the view of the blower housing 300 arranged in the blower housing 1 10 free. The fan inlet 310 is located in the part of the fan housing 1 10, not shown in FIG. 2, below the rotor 140. From there, air is sucked in through the end of the rotor 140 facing the fan inlet 310 due to the rotational movement of the rotor 140, flows through the rotor 140 FIG. 2 also shows that the blower module 105 has a first inlet 210 and a second inlet 220 in the pressure region 330 of the blower duct 300, which are in the transition region between the cover housing 120 and the motor housing 130 arranged openings are formed.

FIG. 3 shows a sectional view of the blower module 105 without the rotor 140 fastened thereto and without the surrounding blower housing 1 10. The blower module 105 consists of the approximately funnel-shaped motor housing 130 and the approximately ceiling-shaped cover housing 120. Within the blower module 105, between the motor housing 130 and the lid housing 120, there is a cavity in which the motor 150 is arranged. The motor 150 is connected to the shaft 160 and can set it in a rotational movement about its longitudinal axis. The motor housing 130 has an opening 131 through which the shaft 160 extends from the interior of the fan module 105 to the outside.

The motor 150 heats up during operation and must therefore be cooled. For this purpose, a cooling channel 200 is arranged in the fan module 105, which extends between the inlets 210, 220 and an outlet 230. In the sectional view of FIG. 3, only the second inlet 220 can be seen. The outlet 230 is formed by the opening 131 in the motor housing 130, through which the shaft 160 extends. The first inlet 210 and the second inlet 220 are, as already explained with reference to FIG. 2, in the pressure region 330 of FIG

Blower duct 300 arranged. Since the outlet 230 of the cooling channel 200 leads to a region of the blower duct 300 in which there is a lower air pressure than in the pressure region 330, during the operation of the blower 100 an air flow automatically sets in, which flows from the first inlet 210 and the second inlet 220 the cooling passage 200 extends to the outlet 230 and thereby the

Motor 150 cools. The fan 100 is usually used so that the fan module 105 is oriented as in the illustration of Figure 3, the motor 150 is thus above the rotor 140. FIG. 3 shows that the cooling channel 200 then runs from the second inlet 220 initially in a second curved section 250 downwards to a bend, where a vertical section 260 of the cooling channel 200 follows, which runs parallel to the motor 150 vertically upwards on the motor 150 passes to the lid housing 120. There, the air flowing through the cooling channel 200 is redirected once again and directed to the outside of the shaft 160 against the shaft 160. From there the air flows either directly outside the engine 150 or through the engine 150 to the shaft 160 connected to the engine 150 and from there through the outlet 230 back to the fan duct 300. If the air is to flow through the engine 150 itself Thus, the housing of the motor 150 must have suitable openings.

The downwardly inclined second curved section 250 of the cooling channel 200 and the adjoining vertical section 260 prevent penetration of moisture entering the cooling channel 200 through the second inlet 220 to the motor 150. The moisture entering through the second inlet 220 collects at the lowest point due to gravity at the junction between the second curved section 250 and the vertical section 260, where it causes no damage. This applies correspondingly to moisture penetrating through the first inlet 210, as will be explained in more detail with reference to the following figures.

FIG. 4 shows the fan module 105 and the rotor 140 attached thereto in a further perspective view. The blower module 105 and the rotor 140 complement each other to a total of approximately cylindrical overall shape. A part of the lateral surface of the cylinder is formed by the fan module 105, the other areas of the cylinder jacket surface are formed by the rotor 140. In the circumferential direction, the cylinder jacket portion of the fan module 105 is formed to a greater extent by the motor housing 130 and to a lesser extent by the cover housing 120. The first inlet 210 and the second inlet 220 are located in the cylinder jacket portion of the blower module 105 between the lid housing 120 and the motor housing 130th The rotor facing away from the annular edge of the cylinder jacket-shaped portion of the fan module 105 is formed as a lip seal 1 1 1. The lip seal 1 1 1 is formed in the circumferential direction in a larger angular range by the motor housing 130 and in a small angular range through the cover housing 120. The lip seal is formed as an annular, at an angle of about 45 ° radially outwardly and away from the rotor 140 upwardly ridge web. If the fan module 105 and the attached rotor 140 are connected to the fan housing 110, then the lip seal 1 1 1 of the fan module 105 comes into contact with a likewise annular step of the fan housing 110, resulting in a tight connection. This can be seen in the sectional view of FIG.

FIG. 5 shows a plan view of the motor housing 130 without the cover housing 120 connected thereto. The breakthrough 131 can be seen in FIG. 5, through which the shaft 160 of the motor 150 extends in the mounted state of the fan 100, and at the same time serves as the outlet 230 of the cooling channel 200 , In addition, in the circumferential outer edge of the motor housing 130, the first inlet 210 and the second inlet 220 can be seen. The first inlet 210 and the second inlet 220 are arranged next to one another in the circumferential direction and around a few

Degree spaced apart. Connected to the second inlet 220 is the second curved section 250 already visible in FIG. 3, which in the illustration of FIG. 5 runs vertically downwards into the plane of the page. A first curved section 240 follows correspondingly to the first inlet 210, which likewise runs downward perpendicularly into the plane of the paper of FIG.

The first curved portion 240 and the second portion 250 merge in the region of the cooling channel 200, where it merges into the vertical portion 260. In the radial direction, the first curved portion and the second curved portion 250 extend from the outside of the motor housing 130 toward the center of the motor housing 130. The first curved section 240 follows a first curve and the second curved section 250 follows a second curve. The first curve and the second curve have opposite curvatures. For example, the first curved portion 240 is curved to the left from the first inlet 210, while the second curved portion 250 from the second inlet 220 is curved to the right. In a simplified embodiment, the first curved portion 240 and the second curved portion 250 may also extend straight from the inlets 210, 220 into the interior of the motor housing 130. In this case, the two portions 240, 250 extend from the point of the cooling passage 200, from which the vertical portion 260 adjoins, radially outward in a V-shape.

The arrangements of the inlets 210, 220 and the shapes of the adjoining curved sections 240, 250 allow air to enter the cooling channel 200 from two different directions. Flows in the presentation of

For example, as shown in FIG. 5, air travels along the engine housing 130 from left to right, this air is particularly easy to flow through the first inlet 210 and the first curved section 240 into the cooling channel 200. In the representation of FIG. 5, on the other hand, if air flows from right to left along the motor housing 130, this air can flow through the second inlet 220 and the second curved section 250 into the cooling channel 200 in a particularly simple manner. This embodiment of the cooling channel 200 makes it possible to operate the rotor 140 of the blower 100 in both possible directions of rotation. Turns the rotor 140 in the illustration of Figure 5 in a clockwise direction, the air from the pressure region 330 of the fan duct 300 is preferably through the second inlet 220 in the

Cooling channel 200 flow. If the rotor 140 rotates in the counterclockwise direction in the illustration of FIG. 5, air from the pressure region 330 of the blower duct 300 will preferably flow through the first inlet 210 into the cooling duct 200.

FIGS. 6 and 7 show a top view and a perspective view of the cover housing 120 without the motor housing 130 connectable to the cover housing 120. FIGS. 6 and 7 show the cover-housing-side boundary walls of the first inlet 210, the second inlet 220, the first curved section 240 and FIGS the second curved portion 250 of the cooling channel

200. It can be seen that both the inlets 210, 220 and the curved sections 240, 250 of the cooling channel 200 extend between the cover housing 120 and the motor housing 130.

The fan module 105 may be combined with both a clockwise and a counterclockwise rotating rotor 140. Depending on Direction of rotation of the rotor 140, the fan module 150 then has to be connected either to a fan housing 1 10, which is formed as in Figure 1, or with a fan housing, which is formed with respect to the fan housing 1 10 of Figure 1 in mirror image. According to the respective direction of rotation of the rotor 140, the fan ducts 300 in the fan housing 110 then run clockwise or counterclockwise. The fan module 105 thus has the advantage of being usable for both types of blower. In motor vehicles usually both types of blowers are used. Since the same type of blower module 105 can be used for both blowers, the number of different components required overall is reduced, resulting in cost reduction.

Claims

claims

1 . Blower module (105)

with a motor housing (130) and a cover housing (120) which can be connected to the motor housing (130),

wherein a motor (150) can be arranged in the fan module (105), wherein the fan module (105) has a substantially cylindrical outer surface,

the fan module (105) having a cooling channel (200) for cooling the motor (150),

characterized in that

the cooling passage (200) has a first inlet (210), a second inlet (220) and an outlet (230),

wherein the first inlet (210) and the second inlet (220) are arranged in the cylindrical outer surface,

wherein a first portion (240) of the cooling passage (200) extends from the first inlet (210) into the interior of the fan module (105)

and a second portion (250) of the cooling passage (200) extends from the second inlet (220) into the interior of the fan module (105).

2. Blower module (105) according to claim 1,

wherein the first portion (240) of the cooling passage (200) extends from the first inlet (210) along a first curve into the interior of the fan module (105)

and the second portion (250) of the cooling passage (200) extends from the second inlet (220) along a second curve into the interior of the fan module (105),

wherein the first curve and the second curve have opposite curvatures.

3. fan module (105) according to any one of claims 1 or 2,

characterized in that the first inlet (210) and the second inlet (220) are disposed between the motor housing (130) and the lid housing (120).

Fan module (105) according to one of the preceding claims, characterized in that

the fan module (105) is mirror-symmetrical with respect to a plane passing between the first inlet (210) and the second inlet (220) and through the center of the fan module (105).

the motor housing (130) has an opening (131) through which a

Shaft (160) can be guided

wherein the aperture (131) forms the outlet (230).

Blower (100)

with a fan module (105),

a motor (150) arranged in the fan module (105),

a rotor (140), which is connected via a shaft to the motor (150), and a fan housing (1 10),

characterized in that

the fan module (105) is formed according to one of claims 1 to 5.

Blower (100) according to claim 6,

characterized in that

a fan duct (300) is arranged in the blower housing (110), wherein the first inlet (210) and the second inlet (220) are arranged in a pressure region (330) of the blower duct (300).

Blower (100) according to one of claims 6 or 7,

characterized in that

between the fan module (105) and the fan housing (1 10) a circumferential lip seal (1 1 1) is formed which is formed in sections by the motor housing (130) and in sections by the cover housing (120) of the fan module (105).