KR20230124788A - Outdoor unit for air conditioner - Google Patents

Abstract

The present invention reduces noise and power consumption by installing a motor mount to which a motor is fixed on a grill, but minimizes flow resistance by maintaining the width of radial ribs supporting the motor mount in the direction of air flow to a minimum, and the motor mount The present invention relates to an outdoor unit of an air conditioner capable of improving the strength of a radial rib and stably supporting a motor by configuring a reinforcing insert to be embedded in a radial rib supporting a radial rib.

Description

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

The present invention relates to an outdoor unit of an air conditioner, and more particularly, a motor mount to which a motor is fixed is installed on a grill to reduce noise and power consumption, while minimizing the width of radial ribs supporting the motor mount in the airflow direction. Regarding the outdoor unit of an air conditioner capable of minimizing flow resistance by maintaining the motor mount and improving the strength of the radial rib and stably supporting the motor by constructing a reinforcing insert embedded in the radial rib supporting the motor mount. will be.

In general, an air conditioner includes a compressor for compressing a refrigerant, an indoor heat exchanger for exchanging heat with indoor air, an expansion valve for expanding the refrigerant, and an outdoor heat exchanger for exchanging heat with outdoor air.

The compressor and the outdoor heat exchanger of the air conditioner may be provided in the outdoor unit, and the indoor heat exchanger of the air conditioner may be provided in the indoor unit. The expansion valve may be provided in at least one of an indoor unit and an outdoor unit.

An outdoor fan may be provided at one side of the outdoor heat exchanger of the air conditioner. The outdoor fan of the air conditioner is driven by a motor.

In general, the motor of the air conditioner is installed on a motor mount bracket provided in the outdoor unit.

That is, the motor mount bracket may be installed inside the outdoor unit, and the motor of the air conditioner may be fixed to the motor mount bracket. At this time, the motor mount bracket is generally configured to be fixed to the outdoor heat exchanger side.

Examining the flow of air in this installation structure, the air introduced into the suction port formed in the cabinet sequentially passes through the outdoor heat exchanger, the motor mount bracket, the motor and the fan, and then is discharged through the discharge port.

However, in such a structure in which the motor and motor mount bracket are installed on the suction side of the fan, the non-uniform flow containing the turbulent and vortex components generated while passing through the motor mount bracket and the motor flows into the suction side of the fan, increasing flow resistance. problems will arise.

In addition, since rigidity must be secured due to the nature of the motor mount bracket, the motor mount bracket should be formed as large as possible. As a result, the motor bracket acts as a factor that increases the flow resistance.

As such, the decrease in blowing efficiency due to the inflow of non-uniform flow and the increase in flow resistance directly causes the increase in power consumption and noise of the motor.

In this regard, in Korean Patent Publication No. 10-2017-0135503 (Prior Document 001), a motor that drives a fan is configured to be directly fixed to the grill side through a motor mount provided on the grill, so that the existing motor mount bracket In addition, an outdoor unit of an air conditioner capable of lowering power consumption and minimizing noise generation by disposing a motor on a discharge side of a fan is disclosed.

However, in the outdoor unit disclosed in Prior Document 001, the width of radial ribs connecting the motor mount and the outer rim of the grill in the front-back direction gradually increases while moving outward in the radial direction.

Therefore, the flow velocity gradually increases while proceeding outward in the radial direction, and the width of the radial rib gradually increases based on the flow direction. As the flow resistance increases, the noise increases and the blowing efficiency decreases. .

In addition, in the outdoor unit disclosed in Prior Document 001, since the width of the inner end of the radial rib in the flow direction is smaller than that of the outer end of the radial rib in the flow direction, the strength of the joint between the inner end of the radial rib and the motor mount is increased. , becomes lower than that of the radially outer end.

Therefore, there is a problem in that the possibility of breakage of the coupling portion between the inner end of the radial rib and the motor mount due to vibration and external shock caused by rotation of the motor is very high.

In addition, the outdoor unit disclosed in Prior Document 001 is configured to be fixed to the motor mount in a state where a part of the motor is accommodated inside the cylindrical motor mount.

Therefore, it has a structure that is vulnerable to heat dissipation of the motor, and as the heat generated by the motor cannot be effectively discharged to the outside, the possibility of failure of the motor due to heat generation is very high, and the power consumption due to the heat generation of the motor increases. .

Korean Patent Publication No. 10-2017-0135503

The present invention has been made to solve the above-mentioned problems of the prior art, and reduces noise and power consumption by installing a motor mount to which a motor is fixed to a grill, while reducing the airflow direction width of radial ribs supporting the motor mount. A first object is to provide an outdoor unit of an air conditioner capable of minimizing flow resistance by keeping it to a minimum.

In addition, a second object of the present invention is to provide an outdoor unit of an air conditioner that can improve the strength of the radial rib and stably support the motor by constructing a reinforcing insert embedded inside the radial rib supporting the motor mount. to be

In addition, the present invention provides an outdoor unit of an air conditioner capable of preventing a decrease in strength of a coupling portion between a motor mount and a radial rib by extending a radially inner end of a reinforcing insert embedded in a radial rib to a motor mount. for the third purpose.

A fourth object of the present invention is to provide an outdoor unit of an air conditioner capable of remarkably improving heat dissipation performance of the motor by exposing the entire outer circumferential surface of the motor to the airflow of outside air.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

The outdoor unit of the air conditioner according to the present invention includes a cabinet having an inlet through which outside air is introduced and an outlet through which outside air is discharged; a grill coupled to the discharge port and formed of a plastic material; an outdoor heat exchanger disposed inside the cabinet and exchanging heat between the refrigerant and the outside air introduced through the inlet; an outdoor fan disposed between the outdoor heat exchanger and the grill and generating airflow of the external air; and a motor coupled to the grill to generate rotational driving force for rotating the outdoor fan and disposed downstream of the outdoor fan based on an airflow direction of the outside air, wherein the grill includes a motor to which the motor is coupled. mount; and a plurality of radial ribs radially arranged around the motor mount, wherein a reinforcing insert made of a metal material is at least partially embedded in at least one of the plurality of radial ribs.

In addition, the grill is disposed radially outside the motor mount and further includes an outer rim coupled to the discharge port, wherein the plurality of radial ribs have radially inner ends connected to the motor mount, and a radially inner edge connected to the motor mount. a first radial rib having an outer end connected to the outer rim and in which the reinforcing insert is at least partially buried; and a second radial rib having a radially inner end connected to the motor mount and a radially outer end connected to the outer rim, wherein the reinforcing insert is not embedded, the first radial rib comprising: the motor mount It may be disposed between a pair of second radial ribs that are continuously arranged along the circumferential direction centered on.

Also, a width of the first radial rib in a circumferential direction may be larger than a width of the second radial rib in a circumferential direction.

In addition, a width of the first radial rib in an airflow direction may be the same as a width of the second radial rib in an airflow direction.

In addition, the grill further includes a plurality of annular ribs arranged concentrically with each other with the motor mount as a center, and the air flow direction width of the first radial rib and the air flow direction width of the second radial rib are It may be smaller than the airflow direction width of the plurality of annular ribs.

In addition, a radially inner end of the reinforcing insert may extend to the inside of the motor mount.

In addition, a radially outer end of the reinforcing insert may extend to the outer rim.

In addition, at least one screw fastening part through which a screw bolt connecting the grill to the outlet passes is provided on the outer rim, and a radially outer end of the reinforcing insert may extend to the at least one screw fastening part. there is.

Further, the reinforcing insert may have a cross-sectional shape such that the airflow direction width is greater than the circumferential direction width.

In addition, the width of the reinforcing insert in the airflow direction may be smaller than the width of the first radial rib in the airflow direction.

In addition, the reinforcing insert may be entirely buried inside the first radial rib.

In addition, the reinforcing insert may be partially embedded in the first radial rib.

In addition, the rear end of the reinforcing insert may be exposed to the air flow of the external air.

In addition, the reinforcing insert may include an insert body entirely embedded in the first radial rib; and an extension portion disposed behind the insert body, partially embedded in the first radial rib, and having a larger circumferential width than the circumferential width of the insert body.

In addition, a width of the insert body in an airflow direction may be greater than a width of the extension portion in an airflow direction.

Also, a circumferential width of the extension may be smaller than a circumferential width of the first radial rib.

In addition, the insert body and the expansion part may be integrally formed.

In addition, the rear end of the expansion part may be exposed to the air flow of the outside air.

In addition, the motor includes one side facing the motor mount, the other side facing the outdoor fan, and an outer circumferential surface provided between the one side and the other side, the outer circumferential surface being the external air may be fully exposed to air currents.

In addition, one side of the motor may be spaced apart from the motor mount and separated.

The outdoor unit of the air conditioner according to the present invention has an effect of reducing noise and reducing power consumption by disposing the motor mount on the grill.

In addition, the outdoor unit of the air conditioner according to the present invention minimizes the width of the radial rib supporting the motor mount in the air flow direction, thereby minimizing the air flow resistance of the outside air.

In addition, the outdoor unit of the air conditioner according to the present invention has an effect of improving the strength of the radial rib and stably supporting the motor by embedding a reinforcing insert in the radial rib.

In addition, the outdoor unit of the air conditioner according to the present invention has an effect of preventing a decrease in strength of the coupling portion between the motor mount and the radial rib.

In addition, the outdoor unit of the air conditioner according to the present invention has an effect of effectively preventing overheating of the motor by exposing the entire outer circumferential surface of the motor to the air current of the outside air.

In addition, the outdoor unit of the air conditioner according to the present invention has an effect of significantly improving the heat dissipation performance of the motor by disposing a heat sink made of metal on the motor mount and connecting the heat sink to the radial ribs.

In addition, the outdoor unit of the air conditioner according to the present invention has an effect of significantly improving the heat dissipation performance of the motor by forming a cooling channel inside the cylindrical rib of the motor mount to which the outer circumferential surface of the motor is coupled.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a functional block diagram of an air conditioner according to the present invention.
FIG. 2 is a perspective view illustrating an outdoor unit among the configurations of FIG. 1 .
Figure 3 is a side view of Figure 2;
4 is a rear view illustrating a state in which a second motor is disposed in the grill of the outdoor unit according to the first embodiment of the present invention.
Figure 5 is a perspective view of Figure 4;
6 is a cross-sectional view in the direction AA of FIG. 4 .
7 to 9 are partially enlarged views of FIG. 6 .
10 is a front view illustrating a grill of an outdoor unit according to a second embodiment of the present invention.
FIG. 11 is a partially enlarged view of FIG. 10 .
12 and 13 are cross-sectional views in the BB direction of FIG. 10 .
14 is a rear view showing the grill of the outdoor unit according to the second embodiment of the present invention.
15 is a perspective view and a partially enlarged view of the heat dissipation plate and reinforcing insert shown in FIG. 14;
16 is a cross-sectional view illustrating a state in which a second motor is disposed in the grill shown in FIG. 14;

The above objects, features and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Although first, second, etc. are used to describe various components, these components are not limited by these terms, of course. These terms are only used to distinguish one component from another component, and unless otherwise stated, the first component may be the second component, of course.

Throughout the specification, unless otherwise stated, each element may be singular or plural.

Hereinafter, the arrangement of an arbitrary element on the "upper (or lower)" or "upper (or lower)" of a component means that an arbitrary element is placed in contact with the upper (or lower) surface of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

In addition, when a component is described as "connected", "coupled" or "connected" to another component, the components may be directly connected or connected to each other, but other components may be "interposed" between each component. ", or each component may be "connected", "coupled" or "connected" through other components.

Singular expressions used herein include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or some of the steps It should be construed that it may not be included, or may further include additional components or steps.

Also, singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "consisting of" or "comprising" should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or some of the steps It should be construed that it may not be included, or may further include additional components or steps.

Throughout the specification, when "A and/or B" is used, this means A, B or A and B unless otherwise specified, and when used as "C to D", this means unless otherwise specified As long as there is no, it means C or more and D or less.

Hereinafter, the present invention will be described with reference to drawings showing the configuration of an outdoor unit O of an air conditioner according to an embodiment of the present invention.

[General composition of air conditioner]

1 shows a schematic configuration of an air conditioner 10 according to the present invention.

Referring to FIG. 1 , an air conditioner 10 according to the present invention may include a compressor 100, an indoor heat exchanger 200, an expansion valve 300, an outdoor heat exchanger 400, and the like. . In the illustrated embodiment, "I" may represent an indoor unit and "O" may represent an outdoor unit.

Although the expansion valve 300 is illustrated as being provided in the indoor unit (I) in FIG. 1, the expansion valve 300 may be provided in the outdoor unit (O), and is separately provided in the indoor unit (I) and the outdoor unit (O). It is also possible to become

The compressor 100 performs a function of compressing the refrigerant. That is, the compressor 100 may be configured to pressurize a refrigerant in a low-temperature, low-pressure state into a refrigerant in a high-temperature, high-pressure state. One or more compressors 100 may be provided in the air conditioner 10 . When a plurality of compressors 100 are provided in the air conditioner 10, the plurality of compressors may be provided in series and/or parallel along the flow direction of the refrigerant.

The indoor heat exchanger 200 serves to generate heat exchange between the refrigerant and indoor air. For example, the indoor heat exchanger 200 may operate as an evaporator in the cooling mode of the air conditioner 10 and as a condenser in the heating mode.

The outdoor heat exchanger 400 serves to generate heat exchange between the refrigerant and outdoor air. For example, the outdoor heat exchanger 400 may operate as a condenser in the cooling mode of the air conditioner 10 and as an evaporator in the heating mode.

The indoor heat exchanger 200 and the outdoor heat exchanger 400 may be fin-tube type heat exchangers. In addition, in order to improve heat exchange efficiency, an indoor fan 210 may be provided on the side of the indoor heat exchanger 200, and an outdoor fan 410 may be provided on the side of the outdoor heat exchanger 400.

In this case, the indoor fan 210 may be driven by the first motor 220 and the outdoor fan 410 may be driven by the second motor 420 . The fan blades 230 of the indoor fan 210 are rotated by the first motor 220 to generate airflow, and the fan blades 411 of the outdoor fan 410 are rotated by the second motor 420 to generate airflow. can be created.

Meanwhile, the air conditioner 10 may further include a flow path switching valve 600 for changing the circulation direction of the refrigerant when the cooling mode and the heating mode are switched. Illustratively, the flow path conversion valve 600 may be provided as a four-way valve.

The flow path switching valve 600, which is a four-way valve, guides the refrigerant discharged from the compressor 100 in the cooling mode to the outdoor unit O, and transfers the refrigerant discharged from the compressor 100 in the heating mode. The flow path can be switched to guide the indoor unit (I).

Meanwhile, oil may be accommodated in the compressor 100 for smooth operation of the compressor 100 . At this time, the oil in the compressor 100 may be mixed with the refrigerant according to the operation of the compressor 100 and discharged together with the refrigerant from the compressor 100 in the form of a mixer.

When the mixer circulates the refrigerant cycle of the air conditioner 10, the heat exchange efficiency of the indoor heat exchanger 200 and the outdoor heat exchanger 400 may decrease. To this end, the air conditioner 10 may further include an oil separator 500 for separating oil from a mixture of the refrigerant and oil discharged from the compressor 100 .

The oil separator 500 may be configured to separate oil from a mixture of refrigerant and oil discharged from the compressor 100 and supply the oil to the compressor 100 again. For example, as shown in FIG. 1 , the mixer discharged from the compressor 100 may be supplied to the oil separator 500 through the supply passage 105 . Then, the liquid oil separated in the oil separator 500 is supplied to the compressor 100 again through the recovery passage 505, and the gaseous refrigerant separated in the oil separator 500 may circulate in the refrigerant cycle.

The aforementioned outdoor unit O may have an orifice for guiding air flowing by the outdoor fan 410 . The orifice may be disposed adjacent to the fan blade 411 of the outdoor fan 410, preferably wrapped around the fan blade 411, to guide air to be sucked into the fan blade 411. .

[Detailed structure of outdoor unit]

Hereinafter, a detailed structure of the outdoor unit O of the air conditioner 10 according to an embodiment of the present invention will be described with reference to FIG. 2 and below.

2 and 3 show a forward discharge type outdoor unit in which external air heat-exchanged with the outdoor heat exchanger 400 is discharged toward the front of the outdoor unit O. In addition to the front discharge type, the configuration described below can also be applied to an upward discharge type outdoor unit in which heat-exchanged external air is discharged in an upward direction of the air conditioner. Although the present invention is not limited thereto, the following will be exemplarily described based on the forward discharge type outdoor unit O.

As shown, the outdoor unit O of the air conditioner 10 according to an embodiment of the present invention includes a cabinet 460 forming an outer body, a grill 440 disposed in front of the cabinet 460, The cabinet 460 may include a compressor 100, an outdoor heat exchanger 400, an outdoor fan 410, a second motor 430, and the like.

The cabinet 460 serves to form the outer body of the outdoor unit O and serves to protect the compressor 100 and the outdoor heat exchanger 400 accommodated therein.

More specifically, the cabinet 460 includes a front cabinet 461 forming the front, a rear cabinet 462 forming the rear, a top cabinet 463 forming the top, a bottom cabinet 464 forming the bottom, It may be configured to include a pair of side cabinets 465 forming both sides. The front cabinet 461 , the rear cabinet 462 , the top cabinet 463 , the bottom cabinet 464 , and the pair of side cabinets 465 are combined to form the cabinet 460 in a substantially hexahedral shape.

The cabinet 460 may be manufactured by press-processing a metal plate having a predetermined strength so as to effectively protect internal components from external impact. At least two of the front cabinet 461, the rear cabinet 462, the top cabinet 463, the bottom cabinet 464, and the side cabinet 465 constituting the cabinet 460 may be integrally formed through press working. can For example, the front cabinet 461 and the pair of side cabinets 465 may be integrally formed through press processing.

Meanwhile, an inlet 4621 through which external air is introduced may be formed in the rear cabinet 462 , and an outlet 4611 through which heat-exchanged external air is discharged may be provided in the front cabinet 461 .

The inlet 4621 provided in the rear cabinet 462 may be formed at the rear of the outdoor heat exchanger 400, and may be exemplarily provided in a slit shape extending in a left-right direction or in a vertical direction. At this time, a plurality of heat exchangers may be provided to correspond to the rear area of the outdoor heat exchanger 400 so that a sufficient intake flow rate can be secured.

The discharge port 4611 provided in the front cabinet 461 is configured to allow the outdoor fan 410 and the second motor 420 to discharge outside air that has passed through the outdoor fan 410 and the second motor 420. It may be provided in front of, and may be illustratively provided in the form of a substantially circular opening.

Therefore, when the outdoor fan 410 is driven by the second motor 420, outside air flows into the cabinet 460 through the inlet 4621, passes through the outdoor heat exchanger 400, undergoes heat exchange, and then passes through the outlet 4611. ) can be discharged to the outside.

Meanwhile, in the outlet 4611 of the front cabinet 461, there is a grill 440 for effectively discharging heat-exchanged external air, preventing the inflow of external foreign substances, and protecting internal components such as the outdoor fan 410 and the like. ) can be detachably coupled.

As will be described later, the second motor 420 driving the outdoor fan 410 may be supported and fixed to the rear surface of the grill 440 . That is, a motor mount 441 supporting and fixing the second motor 420 may be provided at the center side of the rear surface of the grill 440 .

A specific configuration of the grill 440 including the motor mount 441 will be described later with reference to FIG. 4 or less.

An orifice 450 may be coupled to a rear surface of the grill 440 .

The orifice 450 may be directly fixed to the grill 440 along the circumferential direction of the grill 440 . The orifice 450 may be coupled along the circumferential direction of the grill 440 by fastening means such as screw bolts on the rear surface of the grill 440 .

The orifice 450 serves to guide outside air supplied by the outdoor fan 410 toward the grill 440 .

The orifice 450 may be formed in a circular ring shape so that the outdoor fan 410 can be at least partially accommodated inside the orifice 450 .

Illustratively, as shown in FIG. 3 , the diameter of the orifice 450 may be formed such that the diameter gradually decreases while moving from the front to the rear of the orifice 450 and then gradually increases again.

Meanwhile, the outdoor heat exchanger 400 may be formed to exchange heat between the refrigerant and outside air passing through the inlet 4621 of the rear cabinet 462 . Outside air introduced into the cabinet 460 by driving the outdoor fan 410 may exchange heat with the refrigerant in the outdoor heat exchanger 400 while passing through the outdoor heat exchanger 400 .

The outdoor fan 410 may be disposed on an upstream side of the outdoor heat exchanger 400 based on the air flow direction of outside air, and on the front side of the outdoor heat exchanger 400 based on the illustrated embodiment.

That is, the outdoor fan 410 may be disposed between the grill 440 and the outdoor heat exchanger 400 .

Therefore, when the outdoor fan 410 is driven, outside air flows into the cabinet 460 through the inlet 4621, passes through the outdoor heat exchanger 400, the outdoor fan 410, and the orifice 450 in sequence. It may be discharged to the outside through the air outlet 411 .

The outdoor fan 410 may be coupled to the grill 440 and supported by the grill 440 . That is, the outdoor unit O of the air conditioner 10 according to the embodiment of the present invention requires a separate motor mount bracket fixed to the outdoor heat exchanger 400 as in the prior art to install the outdoor fan 410. don't do it with

[First Embodiment]

A configuration of the outdoor unit O according to the first embodiment of the present invention will be described with reference to FIGS. 4 to 9 .

First, referring to FIGS. 4 and 5 , the outdoor fan 410 includes a fan blade 411 and a fan hub 412 supporting the fan blade 411 and connected to the rotary shaft 421 of the second motor 420. It can be configured to include. Preferably, based on the illustrated embodiment, in the outdoor fan 410, the rear side of the fan blade 411 toward the outdoor heat exchanger 400 becomes the suction side, and the fan blade 411 toward the grill 440 The front side of may be an axial flow fan serving as a discharge side.

At this time, the second motor 420 driving the outdoor fan 410 may be coupled to and supported by the grill 440 at the rear of the grill 440 .

To this end, a motor mount 441 to which the second motor 420 is coupled and fixed may be provided at the center of the grill 440 .

In more detail, the motor mount 441 includes a disc-shaped body portion 4411 disposed at the center of the grill 440 and protruding from the rear surface of the disc-shaped body portion 4411 toward the second motor 420. It may be configured to include a first cylindrical rib 4412 and a second cylindrical rib 4413 disposed radially outside the first cylindrical rib 4412 and protruding toward the second motor 420 .

The disk-shaped body portion 4411 is formed at the center of the grill 440 and may be provided in a disk shape substantially concentric with the rotation shaft 422 of the second motor 420 .

In order to protect the second motor 420 and the outdoor fan 410 disposed on the rear side and to effectively cover components disposed on the rear side, the disc-shaped body portion 4411 may be provided in a closed state as a whole.

Accordingly, the diameter of the disc-shaped main body 4411 may be determined to be large enough to completely cover at least the front of the second motor 420 .

The first cylindrical rib 4412 is directly coupled to the second motor 420 to support the second motor 420 and serve to fix the second motor 420 in place.

To this end, the first cylindrical rib 4412 may be provided in a cylindrical shape having a hollow shape protruding from the rear surface of the disc-shaped body portion 4411 so that the outer surface of the second motor 420 may be inserted at least partially. there is.

Illustratively, the front side 4211 of the motor housing 421 of the second motor 420 and a front side part of the outer circumferential surface 4213 may be inserted into the first cylindrical rib 4412, and the second motor The remaining parts of the rear surface 4212 and the outer circumferential surface 4213 of the motor housing 421 of 420 may be exposed to the outside.

Meanwhile, the front end of the first cylindrical rib 4412 is a disk-shaped body portion 4411 so as to effectively withstand the load caused by the weight of the second motor 420 and the vibration caused by the rotation of the second motor 420. It may be integrally formed on the rear side of.

In addition, to prevent weight increase and reduce manufacturing cost, the radial thickness of the first cylindrical rib 4412 needs to be kept to a minimum. Illustratively, as shown in FIG. 4 , the thickness of the first cylindrical rib 4412 in the radial direction may be substantially the same as that of the later-described radial rib in the circumferential direction.

The shape and size of the inner circumferential surface of the first cylindrical rib 4412 are determined so that the outer surface of the second motor 420 can be directly coupled to the outer circumferential surface 4213 of the motor housing 421 in a surface contact state. can

Meanwhile, the front surface 4211 of the motor housing 421 of the second motor 420 may be fixed to the first cylindrical rib 4412 while being separated from and spaced apart from the rear surface of the disc-shaped body portion 4411 .

Accordingly, a predetermined space may be formed between the front surface 4211 of the motor housing 421, the inner circumferential surface of the first cylindrical rib 4412, and the rear surface of the disc-shaped body portion 4411, and the predetermined space is the second motor housing 421. It functions as a cooling channel (C) for air-cooled cooling of (420). A detailed configuration of the cooling channel C will be described later with reference to FIGS. 6 to 9 .

Meanwhile, as shown, a plurality of fastening tabs 4214 for fixing the second motor 420 may be integrally provided on the outer circumferential surface 4213 of the motor housing 421 .

Bolt holes 4215 through which screw bolts can pass in a direction parallel to the rotating shaft 422 may be formed in the plurality of fastening tabs 4214 so that they can be fixed using fastening means such as screw bolts. 4 and 5 show an embodiment in which a total of four fastening tabs 4214 are provided, but this is only an example and the number of fastening tabs 4214 can be adjusted according to the size and weight of the second motor 420. can

In order to effectively distribute and effectively support the load of the second motor 420, the plurality of fastening tabs 4214 are spaced at equal intervals in the circumferential direction around the rotation axis 422 of the second motor 420, respectively. can be placed. As in the illustrated embodiment, when a total of four fastening tabs 4214 are provided, they may be spaced apart from each other at 90 degree intervals.

In addition, as shown, a plurality of cooling fins 423 for dissipating heat generated by the second motor 420 are integrally provided on the outer circumferential surface 4213 and the front surface 4211 of the motor housing 421. It can be. In particular, as will be described later, the cooling fins 423 provided on the front surface 4211 of the motor housing 421 are disposed in a state in which they are entirely exposed to the cooling channel C formed inside the first cylindrical rib 4412. It can be.

At this time, the cooling fins 423 are disc-shaped so that the airflow of external air can flow between the cooling fins 423 provided on the front surface 4211 of the motor housing 421 and the rear surface of the disc-shaped main body 4411. It is separated from the rear surface of the body portion 4411 and becomes spaced apart.

Meanwhile, a fastening boss 4414 into which the aforementioned screw bolts are screwed may be integrally formed on the first cylindrical rib 4412 corresponding to the plurality of fastening tabs 4214 . A bolt groove into which a screw thread of a screw bolt is screwed may be formed inside the fastening boss.

Meanwhile, the second cylindrical rib 4413 may be disposed outside the first cylindrical rib 4412 and substantially concentric with the second cylindrical rib 4413 .

Preferably, the second cylindrical rib 4413 may be provided in a hollow cylindrical shape protruding toward the outdoor fan 410 from an outer edge of the rear surface of the disk-shaped body portion 4411 .

The second cylindrical rib 4413 serves to reinforce the strength of the first cylindrical rib 4412 in response to the load and vibration of the second motor 420 directly acting on the first cylindrical rib 4412 .

To perform such a role of reinforcing strength, the front end of the second cylindrical rib 4413 may be integrally formed with the rear surface of the disc-shaped main body 4411, and the second cylindrical rib 4413 may have a radial shape to be described later. They can be connected radially through ribs.

That is, the outer circumferential surface of the first cylindrical rib 4412 and the inner circumferential surface of the second cylindrical rib 4413 may be configured to be connected through a plurality of radial ribs.

On the other hand, the grill 440 has an outer edge 444 disposed at the outermost edge in the radial direction, a plurality of radial ribs extending from the motor mount 441 toward the outer edge, and a ring shape around the motor mount 441. It may further include a plurality of annular ribs 442 arranged thereon.

The outer rim 444 may be detachably coupled to the outlet 4611 provided in the front cabinet 461 . A screw fastening part 4441 may be provided on the outer rim 444 so that it can be detachably coupled through fastening means such as screw bolts.

The shape of the outer rim 444 may be determined corresponding to the shape of the outlet 4611 provided in the front cabinet 461 . As described above, when the discharge port 4611 has a circular opening, the outer rim 444 may have a ring shape corresponding to this.

The plurality of radial ribs serve to reinforce the rigidity of the motor mount 441 and transmit the load and vibration of the second motor 420 applied to the motor mount 441 to the outer rim 444 along the radial direction. . The transmitted load and vibration may be transmitted to the front cabinet 461 through the outer rim 444 .

To this end, radially inner ends of the plurality of radial ribs may be connected to the motor mount 441 , and radially outer ends of the plurality of radial ribs may be connected to the outer rim 444 .

More specifically, the front surface of the plurality of radial ribs is integrally connected to the disk-shaped body portion 4411 of the motor mount 441, and the radially inner end of the plurality of radial ribs is directly connected to the load of the second motor 420. It may be integrally connected to the outer circumferential surface of the first cylindrical rib 4412 acting as a.

Meanwhile, as described above, a plurality of radial ribs intersect the second cylindrical rib 4413 so as to connect between the first cylindrical rib 4412 and the second cylindrical rib 4413, and pass through the first cylindrical rib 4412. ) can be extended.

At this time, like the first cylindrical rib 4412, the second cylindrical rib 4413 may be integrally connected to the plurality of radial ribs.

Meanwhile, the plurality of radial ribs may be spaced apart from each other at equal intervals around the rotation axis 422 of the second motor 420 so as to disperse and support the load and vibration of the second motor 420 .

In addition, the plurality of radial ribs are configured to support the load of the second motor 420 without a separate reinforcing member unlike the second and third embodiments described later.

To this end, the airflow direction width (WL_D) of the plurality of radial ribs, that is, the width in the front-back direction needs to be maintained at a predetermined level or higher. Illustratively, as shown in FIG. 6 , the airflow direction width (WL_D) of the plurality of radial ribs is at least greater than the height (H_L1) at which the first cylindrical rib 4412 protrudes from the rear surface of the disc-shaped body portion 4411. It can be formed equal or larger.

At this time, unlike the prior art, the air flow direction width (WL_D) of the plurality of radial ribs may be maintained substantially constant while proceeding in the radial direction.

Therefore, unlike the prior art, it is possible to effectively prevent a decrease in strength of the first cylindrical rib 4412 constituting the motor mount 441 and the coupling portion to the first cylindrical rib 4412 .

On the other hand, in order to minimize the flow resistance of the air flow of the outside air, the thickness in the circumferential direction of the plurality of radial ribs may be formed much smaller than the thickness in the air flow direction. Preferably, as described above, the circumference of the plurality of radial ribs The directional thickness may be formed substantially equal to the radial thickness of the first cylindrical rib 4412 and the second cylindrical rib 4413 .

Meanwhile, the plurality of annular ribs 442 may be arranged in a ring shape with the motor mount 441 as the center on the radially outer side of the motor mount 441 .

In this case, each annular rib 442 may have a different diameter, and each annular rib 442 may be arranged to cross a plurality of radial ribs.

Accordingly, the plurality of annular ribs 442 and the plurality of radial ribs that are arranged to cross each other may form arc-shaped openings through which air currents of external air pass.

Like the plurality of radial ribs, the plurality of annular ribs 442 may be integrally co-molded together with the motor mount 441, the outer rim 444, and the plurality of radial ribs during injection molding of the grill 440.

Referring to FIGS. 6 to 9 , the cooling means of the second motor 420 of the outdoor unit O according to the first embodiment of the present invention will be described.

As described above, the front surface 4211 of the motor housing 421 of the second motor 420 and a front side portion of the outer circumferential surface 4213 are inserted into the first cylindrical rib 4412, and the second motor 420 is inserted into the first cylindrical rib 4412. The motor 420 may be coupled to the first cylindrical rib 4412 constituting the motor mount 441 .

Therefore, since the front side 4211 of the motor housing 421 of the second motor 420 and the front side part of the outer circumferential surface 4213 are blocked from the outside by the first cylindrical rib 4412, the second motor Heat from the 420 may not be effectively discharged to the outside, and overheating of the second motor 420 may occur.

To this end, a cooling channel C is provided between the inner circumferential surface of the first cylindrical rib 4412, the outer circumferential surface 4213 and the front surface 4211 of the second motor 420, and the rear surface of the disc-shaped body portion 4411. The first cylindrical rib 4412 may be provided with a plurality of notches to communicate the cooling channel C with the outside of the first cylindrical rib 4412 .

As shown in FIGS. 7 to 9 , each first notch portion 4412a may be provided between a pair of radial ribs 443 disposed adjacent to each other among a plurality of radial ribs 443 .

For example, the first notch portion 4412a may be formed by partially cutting the first cylindrical rib 4412 between a pair of radial ribs 443 disposed adjacent to each other.

At this time, in the first notch portion 4412a, the circumferential width (W_n11) of the rear end is greater than the circumferential width (W_n12) of the front end, and the circumferential width is gradually reduced while proceeding from the rear end to the front end. can have a shape. Illustratively, the first notch portion 4412a may have a trapezoidal shape.

However, the connection strength between the radial rib 443 and the first cylindrical rib 4412 may be weakened by the first notch portion 4412a. In order to prevent such a decrease in connection strength, the circumferential width W_n11 of the rear end and the circumferential width W_n12 of the front end of the first notch portion 4412a are a pair of radial ribs 443 disposed adjacent to each other. It may be smaller than the circumferential width (W_L1) of the first cylindrical rib 4412 formed therebetween.

Also, for a similar reason, the plurality of first notch portions 4412a may be formed at positions that do not overlap with the fastening tab 4214 of the second motor 420 based on the circumferential direction. That is, the plurality of first notch portions 4412a may be formed between adjacent fastening tabs 4214 in the circumferential direction.

Meanwhile, as described above, the first notch portion 4412a serves to communicate the cooling channel C with the outside of the first cylindrical rib 4412 .

To this end, the front end of the first notch part 4412a is forward rather than the front surface 4211 of the second motor 420 so that the first notch part 4412a can serve as an inlet and an outlet of the cooling channel C. It may be formed at a more protruding position toward the .

Through this, the front end of the first notch part 4412a can be in fluid communication with the cooling channel C, and as shown in FIGS. 6 and 7 , the front end of the first notch part 4412a can be used outdoors. An airflow of external air accelerated by the fan 410 may be introduced.

At this time, the air flow of the outside air introduced to the front end of the first notch part 4412a on one side is heat-exchanged with the cooling fins 423 provided on the front surface 4211 of the second motor 420, and then the second motor 420 on the other side. It may be discharged to the outside of the first cylindrical rib 4412 through the first notch portion 4412a.

Meanwhile, a part of the outer circumferential surface 4213 of the second motor 420 may be exposed to the external air flow by the first notch portion 4412a. As such, since the outer circumferential surface 4213 of the second motor 420 can be at least partially exposed to external air, the cooling efficiency of the second motor 420 can be further improved.

In addition, in the second cylindrical rib 4413, a plurality of second notch portions (corresponding to the first notch portion 4412a of the first cylindrical rib 4412) communicating the inside and outside of the second cylindrical rib 4413 ( 4413a) may be provided.

The second notch portion 4413a does not directly function as an inlet and outlet of the cooling channel C, but serves to facilitate the flow of air introduced or discharged through the first notch portion 4412a.

Therefore, similar to the first notch part 4412a, the second notch part 4413a has a shape obtained by partially cutting the second cylindrical rib 4413 provided between a pair of radial ribs 443 disposed adjacent to each other. can be provided with

At this time, in the second notch portion 4413a, the circumferential width (W_n21) of the rear end is greater than the circumferential width (W_n22) of the front end, and the circumferential width is gradually reduced from the rear end to the front end. can have a shape. The second notch portion 4413a may have a trapezoidal shape and may have a larger open area than the first notch portion 4412a.

Similar to the first notch portion 4412a, connection strength between the radial rib 443 and the second cylindrical rib 4413 may be weakened by the second notch portion 4413a. In order to prevent such a decrease in connection strength, a pair of radial ribs 443 disposed adjacent to each other in the circumferential direction width (W_n21) of the rear end and the circumferential width (W_n22) of the front end of the second notch portion 4413a. It may be smaller than the circumferential width (W_L2) of the second cylindrical rib 4413 formed therebetween.

In addition, the plurality of second notch portions 4413a may be formed at positions that do not overlap with the fastening tab 4214 of the second motor 420 based on the circumferential direction. That is, the plurality of second notch portions 4413a may be formed between adjacent fastening tabs 4214 in the circumferential direction.

[Second Embodiment]

The configuration of the grill 440 provided in the outdoor unit O according to the second embodiment of the present invention will be described below with reference to FIGS. 10 to 13 .

First, referring to FIGS. 10 and 11, the second motor 420 driving the outdoor fan 410 in the same manner as in the first embodiment described above is of the motor mount 441 disposed at the center of the grill 440. It can be fixed and placed on the discoid body portion 4411.

A plurality of fastening bosses coupled to the fastening tab 4214 of the second motor 420 may be provided on the rear surface of the disk-shaped body part 4411 . The front surface 4211 of the motor housing 421 of the second motor 420 is spaced apart from the rear surface of the disk-shaped body portion 4411 of the motor mount 441 by a plurality of fastening bosses, and the second motor ( 420) may be supported.

However, unlike the first embodiment, the first cylindrical rib 4412 and the second cylindrical rib 4413 may be omitted. Accordingly, the entire outer circumferential surface 4213 of the motor housing 421 of the second motor 420 is exposed to the air flow of external air, so that cooling efficiency can be improved.

In addition, the plurality of radial ribs 443 provided in the second embodiment may have a smaller width in the airflow direction, that is, a smaller width in the front-back direction than in the first embodiment.

In this way, by forming the air flow direction width of the plurality of radial ribs 443 small, the flow resistance to the air flow of the outside air passing through the grill 440 can be significantly reduced, and through this, power consumption can be reduced and noise generation can be reduced. there will be

However, instead of reducing the flow resistance, the strength of the radial rib 443 connecting the outer rim 444 and the disk-shaped main body 4411 is significantly lowered compared to the first embodiment.

In order to compensate for this decrease in strength, at least one of the plurality of radial ribs 443 constituting the grill 440 of the outdoor unit O according to the second embodiment of the present invention is reinforced with a metal material. Insert 445 may be at least partially buried.

Depending on the size of the grill 440 and the weight of the second motor 420, the reinforcing insert 445 may be provided to be embedded in all of the radial ribs 443 or only to some of the radial ribs 443.

Although the present invention is not limited thereto, illustratively, as shown in FIGS. 10 and 11, four radial ribs among a total of 16 radial ribs 443 are provided with reinforcing inserts 445 based on the configuration. let me explain

Hereinafter, for distinction, a radial rib in which the reinforcing insert 445 is embedded is referred to as a first radial rib 4431, and a radial rib in which the reinforcing insert 445 is not embedded is referred to as a second radial rib 4432.

In consideration of the circumferential thickness of the embedded reinforcing insert 445, the circumferential width WL1_D1 of the first radial rib 4431 may be larger than the circumferential width WL1_D2 of the second radial rib 4432. . The difference between the circumferential width WL1_D1 of the first radial rib 4431 and the circumferential width WL1_D2 of the second radial rib 4432 may correspond to the circumferential width of the reinforcing insert 445 as will be described later. .

In this way, the width in the circumferential direction between the first radial rib 4431 and the second radial rib 4432 may be formed differently by the reinforcing insert 445, but the airflow direction width of the first radial rib 4431 and The air flow direction widths of the second radial ribs 4432 may be set to be the same as each other. Through this, the flow resistance to the air flow of the outside air can be minimized.

Meanwhile, as shown in FIG. 10 , each of the first radial ribs 4431 may be spaced apart from each other at equal intervals in the circumferential direction around the rotation axis 422 of the second motor 420 . When a total of four first radial ribs 4431 are provided as in the illustrated embodiment, they may be spaced apart from each other at 90 degree intervals. Through this, the load of the second motor 420 can be effectively distributed and effectively supported.

The reinforcing insert 445 having higher rigidity than the plastic injection-molded first radial rib 4431 may be formed of a metal material so as to minimize the airflow direction width and the circumferential width of the first radial rib 4431. , Illustratively, it may be formed of a stainless steel-based material.

In this case, the reinforcing insert 445 may be embedded in the first radial rib 4431 when the first radial rib 4431 is molded using an insert injection method.

Meanwhile, the reinforcing insert 445 may extend in a rod shape corresponding to the shape of the first radial rib 4431 extending along the radial direction in a rod shape while having a substantially uniform cross-sectional shape.

At this time, the reinforcing insert 445 may extend beyond the first radial rib 4431 along the radial direction.

In more detail, as shown in FIGS. 10 and 11, the radially inner end portion 445a of each reinforcing insert 445 is configured to extend to the inside of the disc-shaped body portion 4411 of the motor mount 441. It may preferably extend to the position of the fastening boss provided on the rear surface 4212 of the motor mount 441.

Through this, the rigidity of the connection portion between the first radial rib 4431 and the disk-shaped body portion 4411 may be additionally reinforced. In addition, the load of the first motor directly acting on the fastening boss can be effectively distributed to each of the reinforcing inserts 445 .

In addition, the radially outer end portion 445b of the reinforcing insert 445 may extend to the outer rim 444 of the grill 440, and preferably a screw fastening portion 4441 provided on the outer rim 444. can be extended up to

Through this, the rigidity of the connection portion between the first radial rib 4431 and the outer rim 444 may be additionally reinforced. In addition, the load distributed to each reinforcing insert 445 can be effectively transmitted to the front cabinet 461 through the screw fastening part 4441 .

As described above, the cross section of the reinforcing insert 445 may have a shape corresponding to that of the first radial rib 4431 .

By way of example, FIG. 12 shows a configuration of a reinforcing insert 445 having a rectangular cross section corresponding to a first radial rib 4431 having a rectangular cross section.

Therefore, corresponding to the cross-sectional shape of the first radial rib 4431, the reinforcing insert 445 may be configured to have a cross-sectional shape in which the air flow direction width WS_2 is greater than the circumferential direction width WS_1.

However, the reinforcing insert 445 is entirely or partially embedded in the first radial rib 4431 so that the airflow direction width WS_2 of the reinforcing insert 445 is the airflow direction of the first radial rib 4431. It is formed smaller than the width WL1_D2, and the circumferential width WS_1 of the reinforcing insert 445 may be smaller than the circumferential width WL1_D1 of the first radial rib 4431.

At this time, as shown in FIG. 12, in order to minimize the overall airflow direction width of the first radial rib 4431 including the reinforcing insert 445, the reinforcing insert 445 is exposed to the airflow of the outside air only at the rear end. It can be buried inside the first radial rib 4431 in this way. Through this, the overall airflow direction width (WL1_D2) of the first radial rib 4431 including the reinforcing insert 445 can be formed at a level smaller than the airflow direction width (WL_R2) of the annular rib 442.

Meanwhile, FIG. 13 shows a configuration of a reinforcing insert having a cross-sectional shape different from that of the reinforcing insert 445 shown in FIG. 12 .

Referring to FIG. 13, the reinforcing insert 445 includes an insert body 4451 entirely embedded in the first radial rib 4431, and a rear portion of the insert body 4451 disposed behind the first radial rib 4431. It may be configured to include an extension 4452 partially buried inside and having a larger circumferential width WS_s1 than the circumferential width WS_m1 of the insert body 4451 . Here, the insert body 4451 and the extension part 4452 may be integrally formed. That is, the rear end 4451d of the insert body 4451 and the front end 4452c of the extension 4452 may be integrally connected.

The airflow direction width (WS_m2) of the insert body 4451 may be larger than the airflow direction width (WS_s2) of the expansion part 4452.

Also, the width WS_s1 of the extension 4452 in the circumferential direction may be smaller than the width WL1_D1 of the first radial rib 4431 in the circumferential direction.

At this time, similar to the configuration described above, the front end 4451c of the insert body 4451 is buried inside the first radial rib 4431, and the rear end 4452d of the expansion part 4452 is outside. May be exposed to air currents.

Compared to the configuration shown in FIG. 12, a grill 440 having a larger size or a second motor 420 and an outdoor fan 410 having a larger weight are applied to the configuration of the reinforcing insert 445. Therefore, it can be preferably applied to a configuration requiring higher rigidity for the first radial rib 4431.

Alternatively, as will be described later, when the reinforcing insert 445 also functions as a heat dissipation means, it can be preferably applied when a larger heat dissipation area is required.

[Third Embodiment]

The configuration of the grill 440 provided in the outdoor unit O according to the third embodiment of the present invention will be described below with reference to FIGS. 14 to 16 .

Referring first to FIGS. 14 and 16 , most of the configurations may be applied almost the same as those of the second embodiment.

However, unlike the second embodiment, in the configuration according to the third embodiment, the heat generated by the second motor 420 is transferred and the heat dissipation plate disposed on the rear surface of the disk-shaped body portion 4411 of the motor mount 441 (446) may be further included.

The heat dissipation plate 446 directly or indirectly contacts the front surface 4211 of the second motor 420 to function as a heat sink absorbing heat generated by the second motor 420 .

The heat dissipation plate 446 may be disposed on and fixed to a rear surface of the disk-shaped body 4411 of the motor mount 441 . At this time, as will be described later, it may be at least partially embedded in the disc-shaped body portion 4411 in a method of insert injection together with the reinforcing insert 445 . Preferably, the rear surface of the disc-shaped main body 4411 may be entirely exposed to the outside of the disc-shaped main body 4411 .

Corresponding to the shape of the circular body portion, the heat dissipation plate 446 may be provided in a disk shape in which a thickness is generally maintained constant in an air flow direction, that is, in a forward and backward direction.

However, as shown in FIG. 14 , the heat dissipation plate 446 may be configured to have a smaller diameter than the diameter of the disk-shaped body portion 4411 . Preferably, the heat dissipation plate 446 has a diameter sufficient to be disposed in a space formed between a plurality of fastening bosses, and may be configured to have a larger diameter than the diameter of the second motor 420 .

Through this, a portion of the rear surface of the heat dissipation plate 446 that is not covered by the second motor 420 and the heat transfer sheet 447 to be described later can be directly exposed to the flow of external air.

Meanwhile, the heat dissipation plate 446 may be formed of the same material as the reinforcing insert 445, and preferably may be formed of a stainless steel-based material as described above.

As shown in FIG. 15 , the heat dissipation plate 446 may be configured to connect with a plurality of reinforcing inserts 445 .

Preferably, the radially outer edge 446a of the heat dissipation plate 446 may be integrally connected to the radially inner end 445a of each reinforcing insert 445 .

Through this, the heat generated by the second motor 420 and transferred to the heat dissipation plate 446 can be evenly diffused and conducted to the individual reinforcing inserts 445 .

In addition, as in the second embodiment, the rear end of the reinforcing insert 445 is exposed to the air current, and the radially outer end 445b of the reinforcing insert 445 extends as far as possible to the outer rim 444. can

Therefore, the reinforcing insert 445 can serve as a heat dissipation fin that improves the heat dissipation function of the heat dissipation plate 446 in addition to the reinforcing function of the first radial rib 4431 as described above.

At this time, the configuration of the expansion part 4452 of the reinforcing insert 445 according to the second embodiment may be equally applied to the third embodiment.

That is, the heat dissipation performance of the heat dissipation plate 446 can be further improved by directly exposing the rear end surface of the expansion part 4452 having a larger width in the circumferential direction to the air current passing through the grill 440. there will be

Meanwhile, in the configuration according to the third embodiment, one side is in contact with the front surface 4211 of the second motor 420 and the other side is in contact with the heat dissipation plate 446, and the second motor 420 generates A heat transfer sheet 447 transferring heat to the heat dissipation plate 446 may be further included.

The shape of the heat transfer sheet 447 may be determined corresponding to the shape of the front surface 4211 of the second motor 420 that is in contact with it. As in the illustrated embodiment, when the front surface 4211 of the second motor 420 has a circular shape, the heat transfer sheet 447 may be provided in a circular shape.

The heat transfer sheet 447 may be formed of an elastic material having a heat transfer rate higher than a predetermined level and elasticity higher than a predetermined level. Illustratively, it may be formed of a material such as silicon rubber.

At this time, as shown in FIG. 16, the rear surface, which is one side of the heat transfer sheet 447, is in surface contact with the front surface 4211 of the second motor 420, based on the arrangement of the heat transfer sheet 447. The front surface serving as the other side surface comes into surface contact with the rear surface of the heat dissipation plate 446 .

In this way, by disposing the heat transfer sheet 447 formed of an elastic material between the rear surface of the heat radiation plate 446 and the front surface 4211 of the second motor 420, between the heat radiation plate 446 and the second motor 420. The heat transfer area or contact area of can be further expanded, and noise and vibration generated by the second motor 420 can be effectively absorbed.

Meanwhile, as shown in FIG. 16 , the diameter of the heat transfer sheet 447 may be smaller than that of the heat dissipation plate 446 . Through this, a portion of the rear surface of the heat dissipation plate 446 that is not covered with the heat transfer sheet 447 may be directly exposed to the air flow of the outside air.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made. In addition, although the operation and effect according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention above, it is natural that the effects predictable by the corresponding configuration should also be recognized.

10: air conditioner I: indoor unit
O: outdoor unit 400: outdoor heat exchanger
410: outdoor fan 420: second motor
440: grill 441: motor mount
442: annular rib 443: radial rib
445: reinforcing insert 446: heat dissipation plate
450: orifice 460: cabinet

Claims (20)

A cabinet having an inlet through which external air is introduced and an outlet through which external air is discharged;
a grill coupled to the discharge port and formed of a plastic material;
an outdoor heat exchanger disposed inside the cabinet and exchanging heat between the refrigerant and the outside air introduced through the inlet;
an outdoor fan disposed between the outdoor heat exchanger and the grill and generating airflow of the outside air; and
a motor coupled to the grill to generate rotational driving force for rotating the outdoor fan and to be disposed downstream of the outdoor fan based on an airflow direction of the outside air;
including,
the grill,
a motor mount to which the motor is coupled; and
a plurality of radial ribs radially arranged around the motor mount;
including,
An outdoor unit of an air conditioner wherein a reinforcing insert formed of a metal material is at least partially embedded in at least one of the plurality of radial ribs.
In paragraph 1,
The grill is disposed radially outside the motor mount and further includes an outer rim coupled to the outlet,
The plurality of radial ribs,
a first radial rib having a radially inner end connected to the motor mount, a radially outer end connected to the outer rim, and wherein the reinforcing insert is at least partially buried therein; and
a second radial rib having a radially inner end connected to the motor mount, a radially outer end connected to the outer rim, and not embedding the reinforcing insert;
including,
The first radial rib is disposed between a pair of second radial ribs continuously arranged in a circumferential direction with the motor mount as a center.
In paragraph 2,
A width of the first radial rib in a circumferential direction is greater than a width of the second radial rib in a circumferential direction of the outdoor unit of the air conditioner.
In paragraph 2,
The air flow direction width of the first radial rib is the same as the air flow direction width of the second radial rib outdoor unit of the air conditioner.
In paragraph 2,
The grill further includes a plurality of annular ribs arranged concentrically with the motor mount as a center,
The air flow direction width of the first radial rib and the air flow direction width of the second radial rib are smaller than the air flow direction width of the plurality of annular ribs.
In paragraph 2,
An outdoor unit of an air conditioner, wherein a radially inner end of the reinforcing insert extends to an inside of the motor mount.
In paragraph 2,
The outer unit of the air conditioner extends to the outer edge of the reinforcing insert in the radial direction.
In paragraph 7,
The outer rim is provided with at least one screw fastening portion through which a screw bolt connecting the grill to the discharge port passes,
The outer unit of the air conditioner extends to the outer end of the reinforcing insert in the radial direction to the at least one screw fastening part.
In paragraph 2,
The reinforcing insert is an outdoor unit of an air conditioner having a cross-sectional shape in which a width in an airflow direction is greater than a width in a circumferential direction.
In paragraph 9,
The outdoor unit of the air conditioner, wherein a width of the reinforcing insert in the airflow direction is smaller than a width of the first radial rib in the airflow direction.
In paragraph 9,
The reinforcing insert is entirely embedded in the first radial rib.
In paragraph 9,
The reinforcing insert is partially embedded in the first radial rib.
In paragraph 12,
An outdoor unit of an air conditioner wherein a rear end of the reinforcing insert is exposed to the air current of the outside air.
In paragraph 2,
The reinforcing insert,
an insert body entirely embedded in the first radial rib; and
an enlarged portion disposed behind the insert body, partially embedded in the first radial rib, and having a larger circumferential width than the circumferential width of the insert body;
Outdoor unit of an air conditioner comprising a.
In paragraph 14,
An outdoor unit of an air conditioner wherein a width of the insert body in an air flow direction is greater than a width of the expansion part in an air flow direction.
In paragraph 15,
The outdoor unit of the air conditioner, wherein a width in the circumferential direction of the expansion part is smaller than a width in the circumferential direction of the first radial rib.
In paragraph 15,
The outdoor unit of the air conditioner wherein the insert body and the expansion part are integrally formed.
In paragraph 15,
The outdoor unit of the air conditioner is exposed to the air current of the outside air at the rear end of the expansion part.
In paragraph 1,
The motor includes one side facing the motor mount, the other side facing the outdoor fan, and an outer circumferential surface provided between the one side and the other side,
The outdoor unit of the air conditioner wherein the outer circumferential surface is entirely exposed to the air flow of the outside air.
In paragraph 19,
One side of the motor is spaced apart from the motor mount and is separated from the outdoor unit of the air conditioner.

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