KR102249794B1 - Outdoor unit of air conditioner - Google Patents

Abstract

The outdoor unit of the air conditioner of the present invention includes an axial fan; A motor rotating the axial fan; And a support for supporting the motor, wherein the motor support includes a deflection part for deflecting the airflow sucked into the axial fan so as to have a component in a rotational direction of the axial fan.

Description

Outdoor unit of air conditioner {OUTDOOR UNIT OF AIR CONDITIONER}

The present invention relates to an outdoor unit of an air conditioner.

8 is a perspective view showing an outdoor unit of a conventional air conditioner. 9 is a diagram illustrating internal configurations of the outdoor unit of FIG. 8. 10 shows a structure in which the motor is supported in FIG. 8. Referring to these drawings, an air conditioner is a device that harmonizes indoor air by exchanging heat with the refrigerant and surrounding air during the circulation of the refrigerant compressed, condensed, expanded and evaporated. Such an air conditioner may include an indoor unit installed indoors to condition indoor air through heat exchange with indoor air, and an outdoor unit installed outdoors to heat exchange with outdoor air.

The outdoor unit includes a casing (2), a heat exchanger (20) in which heat exchange is performed between the refrigerant and outside air, an axial fan (10) forcibly blowing outside air for smooth contact with the heat exchanger (20), and an axial flow fan (10) It may include a motor 30 to rotate. In the case of an air conditioner for both cooling and heating, the heat exchanger provided in the outdoor unit acts as a condenser during cooling operation and as an evaporator during heating operation. The casing 2 may be provided with a suction port 3 for inhaling outside air and a discharge port 4 through which air blown by the axial fan 10 is discharged.

The motor 30 was supported in the casing 2 by the motor support 40, but the flow resistance due to interference between the airflow sucked into the axial fan 10 and the motor support 40 is a factor that degrades the performance of the fan. And, in particular, there was a problem of increasing the noise.

The problem to be solved by the present invention is to provide an air conditioner capable of improving fan performance and reducing noise generation.

The outdoor unit of the air conditioner of the present invention includes an axial fan; A motor rotating the axial fan; And a support for supporting the motor, wherein the motor support includes a deflection part for deflecting the airflow sucked into the axial fan so as to have a component in a rotational direction of the axial fan.

The outdoor unit of the air conditioner of the present invention has an effect of reducing resistance on a flow path through which air flow is sucked by an axial fan.

In addition, the outdoor unit of the air conditioner of the present invention has the effect of increasing the performance of the axial fan, in particular, the static pressure.

In addition, the outdoor unit of the air conditioner of the present invention has an effect of reducing generated noise.

In addition, the outdoor unit of the air conditioner of the present invention does not require a separate guiding means such as a vane or an orifice, since the means for guiding the airflow sucked into the axial fan is implemented by the motor support. There is an effect that can improve the blowing performance without a large change in the.

FIG. 1 is a diagram referenced to describe direction components of an airflow sucked into an axial fan from an outdoor unit of an air conditioner according to an embodiment of the present invention.
2 shows a motor support according to an embodiment of the present invention.
FIG. 3 is a diagram showing a comparison of the intake air flow in the conventional case (a) and the case (b) according to an embodiment of the present invention.
Figure 4 shows a motor support according to another embodiment of the present invention.
5A is a view showing a cross-sectional view taken along AA of FIG. 4.
5B is an enlarged view of a cross section of the deflecting portion of FIG. 5A.
6 is a graph comparing positive pressure according to the amount of air in the case of applying the motor support of FIG. 4 and the conventional case.
7 is a graph showing a comparison of power consumption according to the amount of air (a) and a comparison of generated noise (b) in the case of applying the motor support of FIG. 4 and the conventional case.
8 is a perspective view showing an outdoor unit of a general air conditioner.
9 is a diagram illustrating internal configurations of the outdoor unit of FIG. 8.
10 shows a structure in which the motor is supported in FIG. 8.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

FIG. 1 is a diagram referenced to describe direction components of an airflow sucked into an axial fan from an outdoor unit of an air conditioner according to an embodiment of the present invention. 2 shows a motor support according to an embodiment of the present invention. FIG. 3 is a diagram showing a comparison of the intake air flow in the conventional case (a) and the case (b) according to an embodiment of the present invention.

First, with reference to FIG. 1, direction components to be described below are defined.

는 축류팬(10)의 축방향을

로 정의 하였을 때의 X-Y-Z 고정 좌표계의 각 축들을 표시한 것이다. 고정좌표계의 XY평면에서의 벡터 V를 축류팬(10)의 회전방향 성분

와, 반경방향 성분

로 구성된 회전좌표계로 변환하여 표시하고 있다. 여기서, V는 축류팬(10)으로 흡입되는 기류(이하, '흡입기류'라고 함.)의

방향 성분을 표시한 것이다. 각도 θ는

를 중심으로 +방향(도면에서 반시계 방향으로 축류팬(10)의 회전방향)으로 회전된 각도이다.The circle (O) represents the orbit of the axial fan 10,

Is the axial direction of the axial fan (10).

When defined as XYZ, each axis of the fixed coordinate system is displayed. The vector V in the XY plane of the fixed coordinate system is the component of the rotation direction of the axial fan (10).

With, radial component

It is converted into a rotational coordinate system composed of and displayed. Here, V is of the airflow sucked into the axial fan 10 (hereinafter, referred to as'intake airflow').

It is an indication of the fragrance component. Angle θ is

It is the angle rotated in the + direction (rotation direction of the axial fan 10 in the counterclockwise direction in the drawing) around.

는 다음과 같이 표현된다.

Is expressed as

)을 따라 흡입되는 기류를 회전방향 성분을 갖도록 편향시키는 모터 지지대를 포함한다. 이하, 실시예들을 들어 참조하여 보다 상세하게 설명한다.As can be seen from the above equation, vector V has a component V2 in the direction of rotation. The outdoor unit of the air conditioner of the present invention is in the axial direction of the axial fan 10 (

) And a motor support for deflecting the airflow sucked along to have a rotational direction component. Hereinafter, it will be described in more detail with reference to examples.

1 to 3, the outdoor unit of the air conditioner according to an embodiment of the present invention supports an axial fan 10, a motor 30 for rotating the axial fan 10, and a motor 30. It includes a motor support (100).

The motor support 100 supports the motor 30 at the rear of the axial fan 10. The motor support 100 may include at least one support leg 110 and 120 supporting the motor 30. In addition, the motor support 100 may include a mounting portion 130 into which the motor 30 is inserted. The support legs 110 and 120 may extend from the mounting portion 130 and support the motor 30 by being connected to a predetermined fixture such as the casing 2.

A plurality may be provided so that the load applied from the motor 30 can be distributed. The support legs 110 and 120 are disposed to be spaced apart from each other, and the airflow flows through the spaced spaces S1 and S2 between the support legs. The plurality of support legs 110 and 120 may include at least one of an upper support leg 110 extending upward from the mounting portion 130 and a lower support leg 120 extending downward.

At one end of the support legs 110 and 120, coupling plates 141 and 142 may be formed, and may be coupled to the casing 2 by the coupling plates 141 and 142. Hereinafter, one of the coupling plates 141 and 142 that connects one end of the upper support legs 110 to each other and is coupled to the upper surface (not shown) of the casing 2 is referred to as the upper coupling plate 141, and the lower support legs One end of the 120 is connected to each other and coupled to the bottom surface 2a of the casing 2 is referred to as a lower coupling plate 142.

)대해 소정의 각도(

)를 이루는 편향면(111)(121)을 포함할 수 있다. 각도

는 예각인 것이 바람직하다. 흡입기류가 편향면(111)(121)을 따라 안내되어 회전방향 성분(

)을 갖는 기류가 형성된다.
편향면(111,121)은 공기유입방향을 기준으로, 후단이 전단보다 축류팬(10)의 회전방향으로 치우친 경사면을 형성할 수 있다. 예를 들어, 도 2를 참조하면, 상부지지다리에 배치된 편향면(111)은 후단이 전단보다 왼쪽으로 치우쳐 배치되며, 이는 축류팬(10)의 회전방향과 일치한다. 또한, 하부지지다리에 배치된 편향면(121)은 후단이 전단보다 오른쪽으로 치우쳐 배치되며, 이 또한 축류팬(10)의 회전방향과 일치한다.The motor support 100 includes a deflection part D for deflecting the airflow (ie, the suction airflow) sucked into the axial fan 10 to have a component in the rotational direction of the axial fan 10. The deflection portion D may be formed on the support legs 110 and 120. The deflecting portion D is a surface through which the suction air flow is guided, and in the axial direction of the axial fan 10 (

) To a predetermined angle (

It may include deflection surfaces 111 and 121 forming ). Angle

Is preferably an acute angle. The inhalation air flow is guided along the deflection surfaces 111 and 121 so that the component in the direction of rotation (

An airflow with) is formed.
The deflecting surfaces 111 and 121 may form an inclined surface in which the rear end is inclined toward the rotational direction of the axial fan 10 rather than the front end based on the air inflow direction. For example, referring to FIG. 2, the deflecting surface 111 disposed on the upper support leg is disposed so that the rear end is skewed to the left than the front end, which coincides with the rotational direction of the axial fan 10. In addition, the deflection surface 121 disposed on the lower support leg is disposed with the rear end skewed to the right than the front end, and this also coincides with the rotational direction of the axial fan 10.

In more detail, the deflecting portion (D) may be formed convexly toward the upstream side of the suction air flow, the air flow contact surface 115, 125 in contact with the suction air flow, in this case, the axial flow on the air flow contact surface 115 The deflecting surfaces 111 and 121 are formed on the front surface facing the rotational direction of the fan 10, and the rearward surfaces 112 and 122 are formed at the portion facing the direction opposite to the rotational direction of the axial fan 10. . The connection surfaces 113 and 123 may connect the deflection surfaces 111 and 121 and the rearward surfaces 112 and 122.

)과 평행하게 연장된다. 따라서, 편향면(111)(121)이 축방향(

)과 이루는 각도(

)는 후향면(112)(122)이 축방향(

)과 이루는 각도보다 크다. 도 3에 도시된 바와 같이, 종래(a)에는 흡입공기가 축류팬의 회전방향과 반대방향 성분을 가졌으나, 본 발명(b)은 흡입공기가 편향면(111)(121)에 의해 편향되기 때문에, 축류팬(10)의 회전방향 성분(

)을 갖는다.The rearward surfaces 112 and 122 are substantially axially (

) And extends parallel. Therefore, the deflection surfaces 111 and 121 are in the axial direction (

) And the angle (

) Indicates that the rear faces 112 and 122 are in the axial direction (

) And is larger than the angle formed by it. As shown in FIG. 3, in the prior art (a), the suction air has a component in a direction opposite to the rotational direction of the axial fan, but in the present invention (b), the suction air is deflected by the deflection surfaces 111 and 121. Therefore, the component in the rotational direction of the axial fan 10 (

).

)을 향하나, 고정좌표계를 기준으로는 상부 지지다리(110)에 형성된 편향면(111)과 하부 지지다리(120)에 형성된 편향면(121)이 서로 반대방향을 향한다.As shown in FIG. 2, the deflection surfaces 111 and 121 formed on the support legs 110 and 120 are all in the rotation direction of the axial fan 10 (

), but based on the fixed coordinate system, the deflection surface 111 formed on the upper support leg 110 and the deflection surface 121 formed on the lower support leg 120 face in opposite directions to each other.

Figure 4 shows a motor support according to another embodiment of the present invention. 5A is a view showing a cross-sectional view taken along line A-A of FIG. 4. 5B is an enlarged view of the cross section 210 (S) of the deflecting portion D'of FIG. 5A.

4 to 5, the outdoor unit of the air conditioner according to another embodiment of the present invention supports an axial fan 10, a motor 30 for rotating the axial fan 10, and a motor 30. It includes a motor support 200.

The motor support 200 supports the motor 30 at the rear of the axial fan 10. The motor support 200 may include at least one support leg 210 and 220 supporting the motor 30. In addition, the motor support 200 may include a mounting portion 230 into which the motor 30 is inserted. The support legs 210 and 220 may extend from the mounting unit 230 and may be provided with a plurality of support legs so that the load applied from the motor 30 can be distributed. The support legs 210 and 220 are disposed to be spaced apart from each other, and an airflow flows through the spaced space between the support legs 210 and 220. The plurality of support legs 210 and 220 may include at least one of an upper support leg 210 extending upward from the mounting part 230 and a lower support leg 220 extending downward.

At one end of the support legs 210 and 220, coupling plates 241 and 242 may be formed, and are coupled to the casing 2 by the coupling plates 241 and 242. Hereinafter, one of the coupling plates 241 and 242 that connects one end of the upper support legs 210 and is coupled to the upper surface (not shown) of the casing 2 is referred to as the upper coupling plate 241, and the lower support legs ( Connecting one end of the 220 and coupled to the bottom surface (2a) of the casing (2) is referred to as a lower coupling plate (242).

Reinforcing ribs 251 and 252 connecting the support legs 210 and 220 between the mounting part 230 and the coupling plates 241 and 242 may be further provided. The reinforcing ribs 251 and 252 may include an upper reinforcing rib 251 connecting between the upper support legs 210 and a lower reinforcing rib 252 connecting the lower support legs 220. .

The motor support 200 includes a deflecting portion D'for deflecting the airflow (that is, the suction airflow) sucked into the axial fan 10 to have a component in the rotational direction of the axial fan 10. The deflection portion D'may be formed on the support legs 210 and 220.
The deflecting surfaces 111 and 121 may form an inclined surface in which the rear end is inclined toward the rotational direction of the axial fan 10 rather than the front end based on the air inflow direction. For example, referring to FIG. 5, the trailing edge (TE), which is the rear end of the upper support leg, is disposed to the left of the leading edge (LE), which is the front end of the upper support leg, and this is the axial flow fan 10 Coincides with the direction of rotation of. The deflecting surfaces formed by the leading edge (LE) and trailing edge (TE) can be seen as the upper surface (U) and the lower surface (L), and the upper surface (U) and the lower surface (L) are skewed toward the rotational direction of the axial fan. Can form an inclined surface.

)가 축류팬(10)의 회전방향 성분(

)을 갖는다. 편향부(D')는 횡단면, 즉, XY 평면을 따라 절개한 단면이 유선형 폐곡선(streamline shape closed path) 또는 에어포일(airfoil) 형태일 수 있으며, 이 경우 벡터

는 전연(LE)으로부터 후연(TE)을 연결하는 코드(chord)가 향하는 방향으로 정의된다.The deflection part (D') is a vector toward the trailing edge (TE) where the airflow is separated from the leading edge (LE) where the inhalation airflow begins to reach.

) Is the component of the rotational direction of the axial fan 10 (

). The deflection portion D'may have a cross-section, that is, a cross-section cut along the XY plane, in the form of a streamline shape closed path or an airfoil, and in this case, a vector

Is defined as the direction in which the chord connecting the leading edge LE to the trailing edge TE is directed.

The deflection portion D'has an upper surface U (or a suction surface) connecting the leading edge LE and the trailing edge TE, and a lower surface L (or, Among the pressure surfaces, the lower surface L faces the direction of rotation of the axial fan 10, and the upper surface U faces the direction opposite to the direction of rotation of the axial fan 10. The velocity of the airflow at the upper surface U is faster than at the lower surface L, and thus, the static pressure at the upper surface L is lower than at the lower surface L.

The airflow flows through the spaced space between the support legs 210 and 220. The plurality of support legs 210 and 220 may include at least one of an upper support leg 210 extending upward from the mounting unit 230 and a lower support leg 220 extending downward.

성분으로 양의 값을 가지나, 상기 제 2 벡터는

성분으로 음의 값을 갖는다.The first vector from the leading edge to the trailing edge of the upper support leg 210 and the second vector from the leading edge to the trailing edge of the lower support leg 220 indicate the rotational direction of the axial fan 10 based on the rotational coordinate system. It is directed, but has a direction component of different signs based on a fixed coordinate system. That is, the first vector is

It has a positive value as a component, but the second vector is

It has a negative value as a component.

6 is a graph showing changes in positive pressure and flow resistance according to the amount of air in the case of applying the motor support of FIG. 4 and the conventional case. 7 is a graph showing a comparison of power consumption according to the amount of air (a) and a comparison of generated noise (b) in the case of applying the motor support of FIG. 4 and the conventional case.

Referring to FIG. 6, according to the experiment, not only the positive pressure was increased in the case (a') of the present invention compared to the conventional case (a), and the flow resistance was increased in the case (b') of the present invention ( decreased compared to b). Therefore, if it is desirable to operate at the air volume F so that the appropriate static pressure and flow resistance are generated in the conventional outdoor unit, the present invention can operate while generating a static pressure and flow resistance similar to those of the prior art, even if the air volume is increased to F'. Do. The increase in static pressure and decrease in flow resistance improves the fan's performance. As shown in (a) of FIG. 7, the present invention has reduced power consumption compared to the prior art, and the amount of noise generated is also reduced compared to the prior art.

Those of ordinary skill in the art to which the present invention pertains will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and are not limiting. The scope of the present invention is indicated by the scope of the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. It must be interpreted.

Claims (11)

Axial fan;
A motor rotating the axial fan; And
Including a motor support for supporting the motor,
The motor support,
And a deflection part for deflecting the suction air flow sucked into the axial fan to have a component in the rotational direction of the axial fan,
The deflection part,
Including; with respect to the air inflow direction, the rear end forms an inclined surface inclined toward the rotational direction of the axial fan rather than the front end; and,
The deflection part,
A surface through which the suction air flow is guided, and includes the deflection surface having a predetermined angle with respect to the axial direction of the axial fan,
The deflection part,
The air flow contact surface to which the suction air flow abuts is formed to be convex toward the upstream side of the suction air flow,
The airflow contact surface,
A turning surface facing the rotational direction of the axial fan; And
It includes a rear facing surface facing the direction opposite to the rotation direction of the axial fan,
The deflection surface is formed on the forward surface,
The rear surface is formed to be parallel to the axial direction of the axial fan, the outdoor unit of the air conditioner. delete The method of claim 1,
The angle is an acute angle outdoor unit of the air conditioner. delete The method of claim 1,
The deflection part,
An outdoor unit of an air conditioner having a vector toward a trailing edge from which the intake air flow starts to touch, from a leading edge where the intake air flow starts to reach, has a rotational direction component of the axial fan. The method of claim 5,
The leading edge and the trailing edge are outdoor units of an air conditioner positioned on a streamlined closed curve. The method of claim 6,
The deflection part,
Of the suction surface and the pressure surface connecting the leading edge and the trailing edge, the pressure surface faces the rotational direction of the axial fan,
The outdoor unit of the air conditioner in which the positive pressure at the suction surface is lower than the positive pressure at the pressure surface. The method of claim 1,
The motor support,
A mounting portion on which the motor is mounted; And
It includes a support leg extending from the mounting portion and connected to a predetermined fixture to support the motor,
The deflection part,
The outdoor unit of the air conditioner formed on the support leg. The method of claim 8,
The deflection part,
A surface through which the suction air flow is guided, and includes a deflection surface having a predetermined angle with respect to the axial direction of the axial fan,
The support leg,
An upper support leg extending upward from the mounting portion; And
It includes a lower support leg extending downward from the mounting portion,
The outdoor unit of the air conditioner, wherein a deflection surface formed on the upper support leg and a deflection surface formed on the lower support leg face in opposite directions based on a fixed coordinate system. The method of claim 8,
The deflection part,
From the leading edge where the intake air flow starts to touch, a vector toward the trailing edge from which the intake air flow is separated has a rotational direction component of the axial fan,
The support leg,
An upper support leg extending upward from the mounting portion; And
It includes a lower support leg extending downward from the mounting portion,
An outdoor unit of an air conditioner, wherein a first vector directed from a leading edge to a trailing edge of the upper support leg and a second vector directed from a leading edge to a trailing edge of the lower support leg have direction components of different signs based on a fixed coordinate system. The method of claim 9,
A plurality of the support legs are provided,
The outdoor unit of the air conditioner through which the suction air flow passes through the plurality of support legs.

Images