KR20090039210A - Assembly structure for blower unit of motor-housing and impeller-housing - Google Patents

Abstract

A structure for assembling an impeller case and a motor housing of a blower unit is provided to prevent air leakage by coupling a horizontal tube of a cooling channel and the motor housing firstly and coupling a vertical tube of the cooling channel and a second trough hole secondly. A motor housing(20) receives a motor. A plurality of fitting protrusions are formed in a circumferential surface of the motor housing. A plurality of fitting protrusions are inserted into an upper part of an impeller case(50). A first through hole is formed in the upper part of the motor housing to cool down the motor. A second through hole is formed in an edge of the upper part of the impeller case. The second through hole bypasses the internal air. The impeller is received in an impeller case. An L-shaped cooling channel(40) is composed of a horizontal tube and a vertical tube. The cooling channel is combined in the motor housing and the impeller case. The cooling channel induces the air through the second through hole and bypasses the air to the first through hole.

Description

Assembly structure for blower unit of motor-housing and Impeller-housing}

The present invention relates to a blower unit coupled to the HVAC module for automobiles to guide the outside air into the air conditioning duct, in particular in the impeller case and motor housing assembly structure of the blower unit, more specifically the impeller case and motor of the blower unit According to the housing assembly structure, the horizontal tube of the cooling channel is primaryly coupled to the motor housing, and immediately after the coupling of the motor housing to the impeller case, the cooling channel is pushed so that the vertical tube is secondly coupled to the second through hole of air. An impeller case and a motor housing assembly structure of a blower unit, characterized by blocking leakage and simplifying an assembly process.

In general, the vehicle HVAC module (Heating Ventilation and Air Conditioning) is a device for cooling or heating the interior of the car, after the forced inflow of outside air through the cooling means or heating means if necessary It is a device to maintain a more comfortable indoor environment by supplying the vehicle interior.

To this end, the automotive air conditioner selectively heats the indoor / outdoor air blown by the blower unit to pass through a heat exchanger for cooling, which is an evaporator through which a refrigerant flows, or a heat exchanger for heating, which is a heater core through which cooling water of an automobile engine flows, and then heat-exchanges the inside of the vehicle. Supply.

The blower unit is coupled to the HVAC module to induce external air into the air conditioning duct.

The blower unit is a means for forcibly drawing outside air, and the motor housing in which the motor is built is coupled to the impeller case in which the impeller is stored.

At this time, the motor housing and the impeller case are usually connected to each other through separate cooling channels. This is to induce air in the impeller case into the motor housing so as to cool the overheated motor in the motor housing.

On the other hand, the motor housing and the impeller case coupling is a structure in which the motor housing is fixed by screwing the impeller case and fixing the cooling channel separately.

This structure takes a lot of time in the process of screwing, and also the assembly process is complicated because it fixes a separate cooling channel.

Therefore, in recent years, a simple structure for screwing the motor housing to the impeller case, but this also has a problem that the cooling channel leaks.

This problem will be described briefly in conjunction with the accompanying drawings.

Figure 1a is a configuration diagram showing a coupling structure of a conventional blower unit, Figure 1b is an exploded perspective view of Figure 1a, Figure 1c is a coupling diagram of the blower unit.

The conventional blower unit 1 is usually composed of a motor housing 2 incorporating a motor 3 and an impeller case 4 incorporating an impeller 5.

The motor housing (2) is a structure that is fixed by rotation by inserting the upper portion of the impeller case (4) through a plurality of fitting protrusions (2a) formed on the circumferential surface.

In addition, the upper surface of the motor housing (2) has a structure in which the cooling channel (2a) is integrally formed, the air inlet (2b-1) of the cooling channel (2a) is a structure formed on the line in the direction of rotation of the motor housing (2). .

In addition, the impeller case 4 also has a structure in which the connection pipe 4a is further protruded so as to be connected to the air inlet 2b-1 of the cooling channel 2a, and the connection pipe 4a is the cooling channel 2a. It is a structure formed on the line of rotation of the air inlet (2b-1) to be coupled to the air inlet (2b-1).

Therefore, when the motor housing 2 is rotated to be inserted and fixed to the upper part of the impeller case 4, the air inlet 2b-1 of the cooling channel 2a is also coupled to and communicated with the connecting pipe 4a. Structure.

However, in the conventional coupling method, the working process is very simple, but the coupling between the inlet and the connection pipe of the cooling channel is not perfect, and a gap is generated at the coupling portion due to the pressure of the air passing into the cooling channel, thereby leaking air. The problem arises.

Accordingly, since the inflow amount of air flowing into the motor housing is reduced, there is a problem in that the performance of the HVAC module is degraded as a result of the overheating of the motor and the rotational force of the impeller being lowered because the motor cannot be cooled in the motor housing.

Therefore, the motor housing and the impeller case are screwed together so that they can be combined by hand without a separate tool, but at the same time, the impeller case of the blower unit and the motor housing of the blower unit are constructed so that the cooling channel is firmly connected. The assembly structure is required.

The present invention has been made in view of the above problems, the present invention is coupled to the HVAC module in the impeller case and motor housing assembly structure of the blower unit to guide the outside air into the air conditioning duct,

The motor housing accommodates the motor, and a plurality of fitting protrusions are formed on the circumferential surface thereof and inserted into the upper portion of the impeller case, and are fixed by rotation. The motor housing includes a first through hole for cooling the accommodated motor. A plurality of insertion grooves into which the fitting protrusions are inserted to be coupled to the motor housing are formed, and a second through hole for bypassing the internal air is formed in the upper surface thereof, and an impeller accommodates the impeller coupled to the motor therein. The motor housing is configured to take a "a" shape formed of a horizontal tube vertically integrated with a bent portion, and to induce air through the second through hole to bypass the air to the first through hole. And a cooling channel coupled to the impeller case, wherein the cooling channel is primarily coupled to the motor housing and connected to the impeller case. Is a standpipe by pushing the coupling immediately after the cooling channel of the motor housing is a secondary coupled to the second through-hole to provide an impeller casing and the motor housing mounting structure of the blower unit, it characterized in that the block the leakage of air.

According to the impeller case and the motor housing assembly structure of the blower unit of the present invention, the horizontal tube of the cooling channel is firstly coupled to the motor housing, and the vertical channel is pushed immediately after the coupling of the motor housing to the impeller case. Secondary through the second hole is characterized in that it can block the leakage of air and at the same time simplify the assembly process.

Hereinafter, the impeller case and the motor housing assembly structure of the blower unit according to the present invention will be described in detail together with the accompanying drawings.

Figure 2a is a perspective view of the impeller case and the motor housing assembly structure of the blower unit according to the present invention, Figure 2b is an exploded perspective view of Figure 2a, Figure 2c is a perspective view of the cooling channel extracted in Figure 2b.

As shown in Figure 2a to 2c, the present invention is coupled to the HVAC module in the impeller case and motor housing assembly structure of the blower unit to guide the outside air into the air conditioning duct, the horizontal tube of the cooling channel 40 ( 41 is first temporarily coupled to the motor housing 20, and immediately after the motor housing 20 is coupled to the impeller case 50, the cooling channel 40 is pushed so that the vertical tube 42 is connected to the second through hole ( 51) is coupled to the impeller case and motor housing assembly structure of the blower unit characterized in that the secondary coupled to block the air leakage and at the same time simplify the assembly process.

The blower unit 10 of the present invention is composed of three parts, which are a motor housing 20, an impeller case 50 to which the motor housing 20 is coupled, the motor housing 20 and an impeller case. It consists of a cooling channel 40 coupled to 50.

Here, the motor housing 20 accommodates the driven motor 30, but a plurality of fitting protrusions 22 are formed on the circumferential surface thereof and inserted into the upper portion of the impeller case 50, and fixed by rotation, and the upper portion thereof. The furnace has a structure in which a first through hole 21 for introducing air to cool the accommodated motor 30 is formed.

At this time, the guide rail 211 for sliding and guiding the cooling channel 40 vertically is formed at both sides of the first through hole 21 of the motor housing 20.

In addition, the motor housing 20 has a structure in which a pair of fastening rings 23 are further formed to couple the cooling channel 40 to the outer side, that is, the edge, on the horizontal line of the first through hole 21.

In addition, the impeller case 50 has a plurality of insertion grooves 52 in which fitting protrusions 22 are overlapped to be coupled to the motor housing 20, and a second through hole for bypassing internal air in the upper edge thereof. 51 is formed, the structure is accommodated inside the impeller 60 is axially coupled to the motor (30).

In addition, the cooling channel 40 has a “a” shape in which the horizontal pipe 41 and the vertical pipe are integrally formed around the bent portion 43, and guides air through the second through hole 51. It is a structure coupled to the motor housing 20 and the impeller case 50 to bypass the air to the first through-hole (21).

Here, the cooling channel 40 is formed at the end of the horizontal tube 41, the sliding plate 411 is formed to slide along the guide rail 211 of the motor housing 20 to form the cooling channel 40 It provides a structure that can be coupled vertically to the motor housing (20).

In addition, the cooling channel 40 has a structure in which the coupling plate 44 is provided at both sides of the bent portion 43 so as to correspond to the fastening ring 23 of the motor housing 20.

At this time, the coupling plate 44 takes the "L" shape consisting of the vertical plate 441 and the horizontal plate 442, when the horizontal plate 442 is coupled to the bent portion 43 when pressed by hand Provide a structure that can be elastically returned.

 The outer surface of the coupling plate 44 has two fastening jaws 441a spaced apart from each other so as to be coupled to the fastening ring 23 in two stages.

Each of the fastening jaws 441a has an inverted triangular shape that is inclined upward so that the coupling plate 44 is not separated upward.

On the other hand, the vertical plate 441 of the coupling plate 44 is inclined toward the outer side is a structure that is firmly in close contact with the fastening ring (23).

Hereinafter, with reference to the accompanying drawings for the assembly method for the impeller case and motor housing assembly structure of the blower unit according to the present invention will be described briefly.

Figure 2d is a perspective view of the motor housing coupled to the cooling channel extracted in Figure 2b, Figure 2e is a coupling diagram of the impeller case and motor housing assembly structure of the blower unit according to the present invention, Figure 2f is a main part of Figure 2e This is an enlarged coupling diagram.

As shown in Figure 2d to 2f, the present invention primary coupling the horizontal tube 41 of the cooling channel 40 to the motor housing 20, the motor housing 20 for the impeller case 50 Immediately after the coupling, the cooling channel 40 is pushed so that the vertical pipe 42 is secondly coupled to the second through hole 51 to block the leakage of air and to simplify the assembly process.

First, as shown in FIGS. 2D and 2E, the cooling channel 40 is first temporarily coupled to be in communication with the first through hole 21 of the motor housing 20.

To this end, the sliding plate 411 of the cooling channel 40 along the guide rail 211 so that the coupling plate 44 of the cooling channel 40 can be coupled to the fastening ring 23 of the motor housing 20. Insert it. At this time, only the fastening jaw 441a at the bottom of the two fastening jaws 441a formed in each coupling plate 44 is inserted to be fixed to the fastening ring 23 so as to provide cooling channels 40 for the motor housing 20. Maintain a temporary bond state of).

 Thereafter, as shown in FIG. 2E, the motor housing 20, to which the cooling channel 40 is coupled, is coupled to the impeller case 50. At this time, the fitting protrusion 22 of the motor housing 20 is impeller case 50. After inserting into the insertion groove (52) of the rotation in the direction of the arrow to fix the motor housing (20).

When the motor housing 20 is rotated and fixed, the vertical pipe 42 of the coupled cooling channel 40 is disposed to be spaced apart from the second through hole 51 of the impeller case 50.

Finally, when the temporarily coupled cooling channel 40 is pushed in the direction of the arrow, the fastening jaw 441a formed at the upper portion of the coupling plate 44 is fixed to the fastening ring 23 and the vertical pipe 42 is the second. Secondary coupling to the through hole 51 is to completely block the leakage of air and at the same time simplify the assembly process.

On the other hand, when disassembling the cooling channel 40 by pressing the coupling plate 44 inwardly by hand to separate the fastening jaw 441a fixed to the fastening ring 23, it is a structure that can be easily removed.

In addition, unlike the prior art, the cooling channel 40 of the present invention is characterized by having an easier coupling structure and a more robust coupling structure because it is coupled in the gravity direction.

Figure 2g is an operation of the impeller case and motor housing assembly structure of the blower unit according to the present invention.

As shown in FIG. 2G, when the motor 30 rotates, the impeller 60 axially coupled to the rotation shaft 31 of the motor 30 rotates.

Then air flows into the lower part of the impeller case 50, and air is sent out to the extension 53 of the impeller case 50. FIG.

At this time, a part of the air sent out is bypassed into the cooling channel 40 through the second through hole 51 and finally flows into the motor housing 20, thereby cooling the motor 30 in the motor housing 20. will be.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include many such variations.

Figure 1a is a block diagram showing a coupling structure of a conventional blower unit,

1B is an exploded perspective view of FIG. 1A;

Figure 1c is a coupling diagram of the blower unit,

Figure 2a perspective view of the impeller case and motor housing assembly structure of the blower unit according to the present invention,

Figure 2b is an exploded perspective view of Figure 2a,

Figure 2c is a perspective view of the cooling channel extracted in Figure 2b,

Figure 2d is a perspective view of the motor housing coupled to the cooling channel extracted in Figure 2b,

Figure 2e is a coupling diagram of the impeller case and the motor housing assembly structure of the blower unit according to the present invention,

2f is an enlarged coupling view of the main part of FIG. 2e,

Figure 2g is an operation of the impeller case and motor housing assembly structure of the blower unit according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: blower unit 2: motor housing

2a: fitting 2b: cooling channel

2b-1: air inlet 3: motor

4: impeller case 4a: connector

5: impeller

10: blower unit

20: motor housing 21: first through

211: guide rail 22: fitting protrusion

23: fastening ring

30: motor 31: rotating shaft

40: cooling channel 41: horizontal tube

411: sliding plate 42: vertical tube

43: bend 44: coupling plate

441: vertical plate 441a: fastening jaw

442: horizontal plate

50: impeller case 51: second hole

52: insertion groove 53: extension tube

60: impeller

Claims (5)

In the impeller case and the motor housing assembly structure of the blower unit coupled to the HVAC module to guide the outside air into the air conditioning duct, The motor 30 is accommodated, but a plurality of fitting protrusions 22 are formed on the circumferential surface thereof so as to be inserted into the upper part of the impeller case 50 to be rotated, and the upper part of the motor 30 is cooled. A motor housing 20 in which a first through hole 21 is formed; A plurality of insertion grooves 52 into which the fitting protrusions 22 are inserted are formed to be coupled to the motor housing 20, and a second through hole 51 for bypassing the internal air is formed in the upper edge. Impeller case 50 is accommodated therein, the impeller 60 is axially coupled to the motor 30; The horizontal tube 41 and the vertical tube 42 are formed integrally with the bent portion 43 and have a "-" shape. The air is guided through the second through hole 51 and the first through hole ( 21) a cooling channel 40 coupled to the motor housing 20 and the impeller case 50 to bypass the air to the air; The cooling channel 40 is primaryly coupled to the motor housing 20, and immediately after the coupling of the motor housing 20 to the impeller case 50, pushes the cooling channel 40 to form a vertical pipe 42. Impeller case and motor housing assembly structure of the blower unit is coupled to the second through hole (51) to block the leakage of air. The method of claim 1, A pair of guide rails 211 for guiding and sliding the cooling channel 40 vertically to both sides of the first through hole 21 of the motor housing 20 and a horizontal edge of the first through hole 21. Fastening ring 23 of the impeller case and motor housing assembly structure of the blower unit, characterized in that is further formed. The method of claim 2, The cooling channel 40 of the blower unit is characterized in that it further comprises a sliding plate 411 which is formed at the end of the horizontal tube 41 and slides along the guide rail 211 of the motor housing 20. Impeller case and motor housing assembly structure. The method of claim 2, The cooling channel 40 is further provided with coupling plates 44 on both sides of the bent portion 43 so as to correspond to the fastening ring 23 of the motor housing 20, the coupling plate 44 is pressed by hand It takes an "L" shape so as to be able to elastically return, characterized in that the outer surface of the coupling plate 44 is formed with two fastening jaws 441a spaced apart from each other to be coupled to the fastening ring 23 in multiple stages. Blower unit impeller case and motor housing assembly structure. The method of claim 4, wherein Each fastening jaw (441a) is an impeller case and a motor housing assembly structure of the blower unit, characterized in that the inverted triangular shape inclined upward so as not to be separated upward.

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