KR20210109151A - Blower unit of two layer type air conditioner for vehicle - Google Patents

Abstract

In an air blower unit of a two-layer-type air conditioner for a vehicle, in which an upper blower wheel is vertically engaged with a lower blower wheel, disclosed is an air blower unit of an air conditioner for a vehicle, which is capable of making a support structure between a motor shaft and a blower wheel firm, and preventing a steering wheel from being shaken. The air blower unit of the air conditioner for the vehicle comprises: a scroll case which is divided into a first passage and a second passage for separately absorbing the internal air and the external air; a first blower wheel placed in the first passage; a second blower wheel placed parallelly to the first blower wheel in an axial direction and placed in the second passage; and a motor rotating the first blower wheel and the second blower wheel. The second blower wheel includes a rotary shaft engagement unit inserting the rotary shaft of the motor. The rotary shaft engagement unit has an extended support unit which is extended in an axial direction toward the first blower wheel.

Description

Blower unit of air conditioner for vehicle {BLOWER UNIT OF TWO LAYER TYPE AIR CONDITIONER FOR VEHICLE}

The present invention relates to a ventilation unit of an air conditioner for a vehicle, and more particularly, to an air conditioner having a two-layer structure that can maintain high heating performance while securing defogging performance during heating. It relates to a blower unit of an air conditioner for a vehicle having a two-layer flow structure that selectively sucks.

In general, an air conditioner for a vehicle is a device that heats or cools a room by introducing external air into a room or circulating air in the room to heat or cool it. A heater core or the like is configured, and the air cooled or heated by the evaporator or the heater core is selectively blown to each part of the vehicle interior.

In particular, in order to maintain a high heating performance while securing defogging performance during heating, an air conditioner having a two-layer structure has been developed. Low-humidity cold outside air is effective to remove frost on windows during heating in winter, but it results in a lower indoor temperature.

The air conditioning system with a two-layer structure realizes a two-layer air flow that supplies outdoor air to the upper part of the vehicle and circulates bet air to the lower part for defogging during heating. While effectively removing it, it provides fresh outside air to the occupants and supplies warm air to the bottom to maintain high heating performance.

Japanese Patent Publication No. 3900965 (2007.01.12), which was previously applied for, discloses a blower unit of an air conditioner for a two-story vehicle. 1 is a cross-sectional view showing a blower unit of a conventional air conditioner for a two-story vehicle.

As shown in FIG. 1, the ventilation unit of the air conditioner for a two-story vehicle includes a case 1, and the case 1 has an inside air inlet 11 for introducing bet air and an outside air inlet 12 for introducing outside air. is formed The case (1) is provided with a bet door 43 for controlling the opening degree of the inside air inlet 11 and the outside air door 44 for controlling the opening degree of the outside air inlet (12). An air filter 5 is provided on the downstream side of the inner and outer air doors 43 and 44 in the air flow direction.

On the downstream side of the air filter (5), dual fans (2,3) rotated by a motor are provided, and on the downstream side of the dual fans (2,3), the first blowing path ( 15) and the second ventilation passage 16 are partitioned. The inside door 43 and the outside door 44 are rotated about the rotation shaft 41, and the partition plate 42 is integrally formed.

The partition plate 42 is composed of a first plate portion 42a extending from the rotation shaft 41 to the arc surface side of the case 1 and a second plate portion 42b extending from the rotation shaft 41 to the air filter 5 side. . In the two laminar flow mode, as the tip of the first plate part 42a is positioned between the inside and outside air inlets 11 and 12, the flow path and the outside air inlet ( In 12), a flow path connecting the second ventilation passage 16 is divided.

The conventional two-layer structure blowing unit has dual fans 2 and 3 divided into upper and lower sides, and is composed of an upper wheel and a lower wheel. In this case, the motor shaft is supported by the upper wheel and the lower wheel, and the dual wheel structure makes it difficult to adjust the wheel balance because the overall height of the wheel is higher than that of the single wheel structure. Due to this, there is a problem in that the handle vibrates when the dual fans 2 and 3 are operated.

Patent Document 1: Japanese Patent Publication No. 3900965 (2007.01.12)

In order to solve the conventional problems, in the present invention, the vibration of the handle is reduced by strengthening the support structure between the motor shaft and the blower wheel in the blowing unit of the air conditioner for a two-level vehicle in which the upper blower wheel and the lower blower wheel are vertically coupled. Provided is a blowing unit of an air conditioning system for a vehicle that can prevent it.

A ventilation unit of an air conditioner for a vehicle according to the present invention includes: a scroll case in which a first passage and a second passage are partitioned so as to separate bet and external air to be sucked; a first blower wheel provided in the first passage; a second blower wheel disposed in parallel with the first blower wheel in the axial direction and provided in the second passage; and a motor for rotating the first blower wheel and the second blower wheel, wherein the second blower wheel has a rotating shaft coupling part for inserting a rotation shaft of the motor, and the rotation shaft coupling part axially toward the first blower wheel It has an extended extension support.

In the above, the extended support portion is formed to extend to a portion overlapping the first blower wheel.

In the above, the first blower wheel includes a first guide portion for guiding the air sucked in the axial direction in a radial direction.

In the above, the first guide portion is made of a convex dome shape to cover the lower portion of the first blower wheel.

In the above, a rotation shaft coupling part for coupling the rotation shaft of the motor to the center of the first guide part is provided, and the extended support part is formed in parallel with the rotation shaft coupling part in the axial direction.

In the above, a plurality of ribs extending radially with respect to the center are provided on the inside of the first guide part, and an end of the rib on the center side of the first guide part forms a step, so that the extended support part has an axial direction and a radius by the step. constrained and supported in the direction

In the above, the fitting protrusion coupled to the first blower wheel on the edge in the radial direction of the first guide part protrudes in the axial direction to extend in the circumferential direction, and the hook part protrudes from both sides in the radial direction and is hooked to the first blower wheel. provided, the first guide portion is coupled to the first blower wheel.

In the above, the second blower wheel includes a second guide part for guiding the air sucked in the axial direction in a radial direction.

In the above, the upper end of the extension support is formed above the lower end of the first blower wheel.

In the above, the rib is formed to extend radially from the rotation shaft coupling portion formed in the center of the first guide portion.

In the above, the step is extended in the radial direction from the rotation shaft coupling portion and is formed to extend 90° in the axial direction.

The blower unit of the air conditioner for a vehicle according to the present invention can effectively prevent the shaking of the handle when the blower wheel is operated by strengthening the support structure between the motor rotating shaft and the blower wheel, and the support structure of the motor rotating shaft is configured in a double layer to provide more stable support can get

1 is a cross-sectional view showing a blower unit of a conventional air conditioner for a two-story vehicle;
2 is a cross-sectional view illustrating a blowing unit of an air conditioner for a vehicle according to an embodiment of the present invention;
3 is a partially cut-away perspective view of a blower wheel according to an embodiment of the present invention;
4 is a front cross-sectional view of a blower wheel according to an embodiment of the present invention;
5 is an enlarged front cross-sectional view of a part of a blower wheel according to an embodiment of the present invention;
6 is a rear perspective view of a first guide part according to an embodiment of the present invention;
7 is a front cross-sectional view of a first guide part according to an embodiment of the present invention;
8 is a chart showing experimental results of a blower unit of an air conditioner for a vehicle according to an embodiment of the present invention.

Hereinafter, the technical configuration of the ventilation unit of the vehicle air conditioner will be described in detail according to the accompanying drawings.

2 is a cross-sectional view illustrating a blowing unit of an air conditioner for a vehicle according to an embodiment of the present invention, FIG. 3 is a partially cutaway perspective view of a blower wheel according to an embodiment of the present invention, and FIG. 4 is an embodiment of the present invention A front cross-sectional view of a blower wheel according to an embodiment, FIG. 5 is an enlarged front cross-sectional view showing a part of a blower wheel according to an embodiment of the present invention, and FIG. 6 is a rear surface of the first guide part according to an embodiment of the present invention It is a perspective view, and FIG. 7 is a front cross-sectional view of the first guide part according to an embodiment of the present invention.

In the following description, the up-down direction in FIG. 2 is the "axial direction", and the left-right direction is the "radial direction".

2 to 7 , the ventilation unit 100 of the vehicle air conditioner according to an embodiment of the present invention has a two-layer structure capable of separately inhaling bet and outside air, and includes a scroll case 110 and a first The blower wheel 120, the second blower wheel 130, and a motor 160 and a guide unit is made.

The scroll case 110 has a first inlet 111 and a second inlet 112 for sucking at least one of bet and outside air. A first passage 113 that is an air passage through the first inlet 111 and a second passage 114 that is an air passage through the second inlet 112 are formed in the scroll case 110 . The first passage 113 and the second passage 114 are partitioned. An intake unit (not shown) having an inside air inlet and an outside air inlet, and an inside and outside air switching door for selectively introducing the bet and outside air is coupled to the upper portion of the scroll case 110 .

The first inlet 111 is opened toward the top, and the second inlet 112 is opened toward the bottom. The first passage 113 has a scroll shape, and the air sucked in from the first inlet 111 moves to the air conditioning unit through the first passage 113 and is discharged into the room. The second passage 114 has a scroll shape, and the air sucked in from the second inlet 112 moves to the air conditioning unit through the second passage 114 and is discharged into the room. The end 115 of the scroll case 110 is opened to be connected to the air conditioning unit.

The first blower wheel 120 is provided in the first passage 113 , sucks air through the first inlet 111 and blows air to the air conditioning unit. The second blower wheel 130 is provided in the second passage 114 , sucks air through the second inlet 112 and blows the air to the air conditioning unit. The first blower wheel 120 and the second blower wheel 130 are formed of a centrifugal type fan.

The first blower wheel 120 has a first base 121 . The first base 121 has a substantially disk shape, and has a donut shape as a whole with a center pierced in the vertical direction (axial direction). A plurality of wheel blades 128 are integrally formed on the first base 121 in the axial direction. A rim 129 is formed at the end of the wheel wing 128 to connect the plurality of wheel wing 128 . The central opening of the first base 121 is covered by the first guide part 300 .

The second blower wheel 130 has a second base 131 . The second blower wheel 130 is disposed in parallel with the first blower wheel 120 in the axial direction. The second base 131 has a substantially disk shape, and has a donut shape as a whole with a center pierced in the vertical direction (axial direction). A plurality of wheel blades 138 are integrally formed on the second base 131 in the axial direction. An edge 139 is formed at the end of the wheel blade 138 to connect the plurality of wheel blades 138 . The central opening of the second base 131 is covered by the second guide 200 .

By the rotation of the first blower wheel 120 and the second blower wheel 130 , air is sucked in in the axial direction and then sent to the outside of the scroll case 110 in the radial direction. The first blower wheel 120 and the second blower wheel 130 are arranged side by side in the axial direction, and the first base 121 and the second base 131 are integrally connected to form one body. The axially inner end, that is, the lower end of the first blower wheel 120 , is connected with the axially inner end, that is, the upper end of the second blower wheel 130 .

The motor 160 rotates the first blower wheel 120 and the second blower wheel 130 . The first blower wheel 120 includes a rotation shaft coupling part 125 for inserting the rotation shaft of the motor 160 , and the second blower wheel 130 includes a rotation shaft coupling part 135 for inserting the rotation shaft of the motor 160 . to provide

The guide unit is provided in the scroll case 110 to radially guide air sucked in the axial direction through the first inlet 111 and the second inlet 112 . The guide unit includes a first guide unit 300 provided in the first passage 113 and a second guide unit 200 provided in the second passage 114 .

The first guide part 300 is an upper guide, and is convexly formed in the first passage 113 , which is a lower portion of the first inlet 111 . The second guide part 200 is a lower guide, and is formed in the second passage 114 that is the upper part of the second inlet 112 convexly downward. The first guide part 300 guides the air sucked in the axial direction through the first inlet 111 to be discharged in the radial direction through the first passage 113 . The second guide unit 200 guides the air sucked in the axial direction through the second inlet 112 to be discharged in the radial direction through the second passage 114 .

The first guide part 300 has a dome shape convex upwards. The first guide part 300 includes a dome-shaped body 301 and a rotation shaft coupling part 125 formed in the center of the body 301 . A D-cut-shaped coupling hole 305 is formed through the rotation shaft coupling part 125 in the axial direction.

The first guide unit 300 covers the lower portion of the first blower wheel 120 . A fitting protrusion 302 is formed on the edge of the first guide part 300 in the radial direction. The fitting protrusion 302 is formed to extend in the circumferential direction along the edge of the body 301 of the first guide part 300, and protrudes toward the motor (toward the bottom) in the axial direction. The fitting protrusion 302 is coupled to the concave groove formed in the first blower wheel 120 .

A hook part 303 is provided at an edge of the first guide part 300 . The hook part 303 protrudes from the body 301 of the first guide part 300 to both sides in the radial direction, and is hook-coupled to the first blower wheel 120 . Through this configuration, the first guide part 300 is coupled to the first blower wheel 120 . A rotation shaft coupling part 125 for coupling the rotation shaft of the motor 160 to the center of the first guide part 300 is provided.

The second blower wheel 130 includes a rotation shaft coupling part 135 for inserting the rotation shaft of the motor 160 . The second guide part 200 is formed to cover the central opening of the second base 131 , and extends from the second base 131 to have a narrower inclination toward the bottom. The rotation shaft coupling part 135 of the second blower wheel 130 is integrally formed to extend from the second guide part 200 .

The rotation shaft coupling part 135 of the second blower wheel 130 includes an extended support part 400 . The extended support part 400 extends toward the first blower wheel 120 in the axial direction from the end of the rotation shaft coupling part 135 of the second blower wheel 130 . The extended support part 400 increases the coupling contact area with the rotation shaft of the motor 160 to improve the support force. Due to this, it is possible to significantly improve the vibration of the handle during operation of the blower wheel.

The extended support part 400 is formed in parallel with the rotation shaft coupling part of the blower wheel in the axial direction. That is, the soft support part 400 is formed in parallel with the rotation shaft coupling part 125 of the first blower wheel 120 and the rotation shaft coupling part 135 of the second blower wheel 130 on the same axis.

The rotation shaft coupling portion 135 of the second blower wheel 130 is integrally formed extending from the second base 131 serving as the main body, and the rotation shaft coupling portion 125 of the first blower wheel 120 is connected to the first It is formed in the guide part 300 . The first guide part 300 is manufactured as a separate product and is coupled to the first base 121 .

The rotation shaft coupling part 135 of the second blower wheel 130 mostly plays a role of supporting the rotation shaft of the motor 160 , and the motor with a greater load than the rotation shaft coupling part 125 of the first blower wheel 120 . (160) to support the axis of rotation. On the other hand, the rotation shaft coupling portion 125 of the first blower wheel 120 supports the rotation shaft of the motor 160 , but serves to assist with a lower support force than the rotation shaft coupling portion 135 of the second blower wheel 130 . do

The extended support part 400 may be separately coupled to the rotation shaft coupling part 135 of the second blower wheel 130, but it is integrally formed to extend upward from the rotation shaft coupling part 135 of the second blower wheel 130. it is preferable As a result, the extension support 400 increases the supporting force of the rotation shaft of the motor 160 by performing the main support function of the rotation shaft of the motor 160 performed by the rotation shaft coupling part 135 of the second blower wheel 130 .

The extended support part 400 is formed to extend to a portion overlapping the first blower wheel 120 . That is, the upper end of the extended support 400 is formed above the lower end of the first blower wheel 120 . In more detail, the extended support part 400 is formed to protrude upward than the first base 121 of the first blower wheel 120 .

When the motor 160 is driven and the rotating shaft rotates the first blower wheel 120 and the second blower wheel 130 at high speed, the rotating shaft of the motor 160 receives a greater force toward the end, and the first blower The rotation shaft coupling portion 125 of the wheel 120 receives a greater force than the rotation shaft coupling portion 135 of the second blower wheel 130 . Since the first blower wheel 120 receives a greater force from the rotation shaft of the motor 160 toward the upper side with respect to the first base 121 , the extension support 400 is coupled to the rotation shaft of the second blower wheel 130 . The portion 135 protrudes from the portion 135 to a portion overlapping with the first blower wheel 120 , thereby stably supporting the rotation shaft of the motor 160 .

The first guide part 300 includes a plurality of ribs 310 . The rib 310 is formed to extend radially with respect to the center on the inner side of the first guide part 300 . An end of the rib 310 on the center side of the first guide part 300 forms a step 350 . The extended support part 400 is supported by being constrained in the axial direction and the radial direction by the step 350 .

More specifically, the rib 310 is formed to extend radially from the rotation shaft coupling portion 125 of the first blower wheel 120 formed in the center of the first guide portion 300 . The step 350 is formed by extending in a radial direction from the rotation shaft coupling portion 125 of the first blower wheel 120 and bending 90° in the axial direction.

The step 350 double supports the rotation shaft of the motor 160 supported by the rotation shaft coupling part 135 and the extension support part 400 of the second blower wheel 130 once again to prevent vibration during operation of the blower wheel. By holding it more stably, vibration noise can be reduced more reliably.

8 is a chart showing experimental results of a blower unit of an air conditioner for a vehicle according to an embodiment of the present invention.

Referring to FIG. 8 , as shown in the table of analysis results, it can be seen that the deformation amount is reduced in both the static analysis and the dynamic analysis when the extended support unit 400 is provided as in the present invention compared to the prior art. In the case of static analysis, the amount of deformation of the present invention was reduced by 0.89 mm compared to the prior art, and in the case of the dynamic analysis, the amount of deformation of 0.02 mm was reduced in the present invention compared to the prior art. In the case of the dynamic analysis, it is an analysis that simulates the rotation of the blower wheel and includes the balance state, and in the case of the static analysis, it is an effective experiment to confirm the amount of deformation by the analysis of the stationary state of the blower wheel.

In addition, in the actual vehicle evaluation, in the case of a distribution of values of 110 dB or more of steering wheel vibration, the NG portion occupied 27.8% in the conventional range of 111.8 to 120.3 dB, but in the present invention, the NG portion is dramatically reduced from 110.0 dB to 2.2%. got

Up to now, the blower unit of the vehicle air conditioner according to the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. will be. Accordingly, the true technical protection scope should be determined by the technical spirit of the appended claims.

100: blowing unit
110: scroll case 111: first entrance
112: second entrance 113: first passage
114: second passage 120: first blower wheel
130: second blower wheel 160: motor
121: first base 131: second base
125, 135: rotation shaft coupling part
301: body 302: fitting projection
303: hook 305: coupling hole
310: rib 350: step
200: second guide unit 300: first guide unit
400: extended support

Claims (11)

a scroll case in which a first passage and a second passage are partitioned so that the bet and the outside air can be separately sucked;
a first blower wheel provided in the first passage;
a second blower wheel disposed in parallel with the first blower wheel in the axial direction and provided in the second passage; and
A motor for rotating the first blower wheel and the second blower wheel,
The second blower wheel includes a rotation shaft coupling portion for inserting a rotation shaft of the motor, and the rotation shaft coupling portion has an extended support portion extending toward the first blower wheel in an axial direction. The method of claim 1,
The blowing unit of the air conditioner for a vehicle, characterized in that the extended support portion is formed to extend to a portion overlapping the first blower wheel. The method of claim 1,
The first blower wheel is a blower unit of an air conditioner for a vehicle having a first guide part for guiding air sucked in an axial direction in a radial direction. 4. The method of claim 3,
The first guide portion is formed in a dome shape with a convex upper portion and covers the lower portion of the first blower wheel. 5. The method of claim 3 or 4,
A blower unit for a vehicle air conditioner, characterized in that a rotation shaft coupling part coupling the rotation shaft of the motor is provided at the center of the first guide part, and the extended support part is formed in parallel with the rotation shaft coupling part in an axial direction. 5. The method of claim 3 or 4,
A plurality of ribs extending radially with respect to the center are provided on the inside of the first guide part,
An end of the rib on the center side of the first guide part forms a step, and the extended support part is constrained and supported in the axial and radial directions by the step. 5. The method of claim 3 or 4,
A fitting protrusion coupled to the first blower wheel on the edge of the first guide part in the radial direction protrudes in the axial direction to extend in the circumferential direction, and protrudes from both sides in the radial direction to hook the first blower wheel. , A blowing unit of an air conditioner for a vehicle in which the first guide part is coupled to the first blower wheel. 5. The method according to any one of claims 1 to 4,
The second blower wheel is a blower unit of an air conditioner for a vehicle having a second guide part for guiding air sucked in an axial direction in a radial direction. 5. The method according to any one of claims 1 to 4,
The upper end of the extended support part is a blower unit of the vehicle air conditioner, characterized in that formed above the lower end of the first blower wheel. 7. The method of claim 6,
The rib is a ventilation unit for a vehicle air conditioner, characterized in that extending radially from the rotation shaft coupling portion formed in the center of the first guide portion. 11. The method of claim 10,
The step is a blower unit of the air conditioner for a vehicle, characterized in that it extends in the radial direction from the rotation shaft coupling portion and is bent by 90° in the axial direction.

Images