KR101899824B1 - An outdoor unit and airconditioner having it - Google Patents

Abstract

The present invention relates to an outdoor unit body; A first heat exchanger provided in the outdoor unit body to exchange heat with outdoor air; A second heat exchanger provided in the outdoor unit body for exchanging heat with outside air, the second heat exchanger being spaced apart from the first heat exchanger and surrounding the first heat exchanger; And an outdoor fan that introduces outside air into the outdoor unit main body and discharges the air to the outside of the outdoor unit body through the first heat exchanger and the second heat exchanger, and an air conditioner including the outdoor unit.

Description

[0001] The present invention relates to an outdoor unit and an air conditioner having the outdoor unit and an air conditioner having the same,

The present invention relates to an outdoor unit having a dual heat exchanger and an air conditioner having the outdoor unit.

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

The compressor, the expansion valve, and the outdoor heat exchanger may be included in the outdoor unit, and the expansion valve and the indoor heat exchanger may be included in the indoor unit. Depending on the product, an outdoor heat exchanger may be provided in the outdoor unit, and the compressor and the expansion valve may be provided in a separate machine room.

The outdoor unit may include a plurality of outdoor heat exchangers to enhance heat exchange efficiency.

1 is a view showing a conventional outdoor unit having a plurality of outdoor heat exchangers.

Referring to FIG. 1, the conventional outdoor unit includes a plurality of outdoor heat exchangers 1 and 2 and a fan 11 disposed on one side of the outdoor heat exchanger.

The plurality of outdoor heat exchangers 1 and 2 includes a first outdoor heat exchanger 1 disposed relatively adjacent to the fan 11 and a second outdoor heat exchanger 2 disposed relatively far from the fan 11, ).

The first outdoor heat exchanger (1) and the second outdoor heat exchanger (2) are each formed in a flat plate shape and arranged to face each other. That is, the first outdoor heat exchanger (1) and the second outdoor heat exchanger (2) may be arranged parallel to each other.

At this time, the first outdoor heat exchanger 1 and the second outdoor heat exchanger 2 are connected by a connection pipe 7, and the refrigerant flows through the first outdoor heat exchanger 1, the connection pipe 7, And the second outdoor heat exchanger (2) sequentially.

Therefore, when the fan 11 is driven, the outside air flows through the first outdoor heat exchanger 1 and the second outdoor heat exchanger 2 sequentially through the first outdoor heat exchanger 1 and the second outdoor heat exchanger 2, And can be heat-exchanged with the refrigerant in the outdoor heat exchanger (2).

That is, the conventional outdoor unit is formed by arranging two outdoor heat exchangers (1, 2) in a flat plate shape in parallel with each other and exchanging heat between the outdoor air supplied by one fan and the refrigerant in the outdoor heat exchangers.

On the other hand, when the outdoor heat exchangers 1 and 2 of the conventional outdoor unit are arranged in parallel, the heat exchanger (i.e., the second heat exchanger) remote from the fan 11 decreases the flow rate and flow rate of the air, .

Since the heat exchangers 1 and 2 of the outdoor units in the prior art perform heat exchange between air and refrigerant primarily in the outdoor heat exchanger 1 close to the fan 11, The heat exchange efficiency between the air and the refrigerant in the heat exchanger 2 can be reduced.

Further, in order to increase the heat exchange area in the conventional outdoor unit, the number of the plurality of the actual heat exchangers arranged in parallel needs to be increased, which increases the overall width of the outdoor unit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an outdoor unit and an air conditioner including the same that can reduce the flow rate and flow rate of air passing through a plurality of outdoor heat exchangers, do.

It is another object of the present invention to provide an outdoor unit capable of increasing heat exchange efficiency between air and refrigerant by preventing the outside air from sequentially passing through a plurality of outdoor heat exchangers, and an air conditioner including the outdoor unit.

It is another object of the present invention to provide an outdoor unit and an air conditioner including the outdoor unit, wherein the heat exchange area of the outdoor heat exchanger is increased but the increase in the overall width of the outdoor unit can be minimized.

In order to achieve the above object, the present invention provides an outdoor unit comprising: an outdoor unit main body; A first heat exchanger provided in the outdoor unit body to exchange heat with outdoor air; A second heat exchanger provided in the outdoor unit body for exchanging heat with outside air, the second heat exchanger being spaced apart from the first heat exchanger and surrounding the first heat exchanger; And an outdoor fan that introduces outside air into the inside of the outdoor unit main body and discharges the outside air to the outside of the outdoor unit body through the first heat exchanger and the second heat exchanger.

At this time, the first heat exchanger has a plurality of first bends formed between a plurality of first side surfaces and neighboring first side surfaces, and the second heat exchanger has a plurality of first side surfaces and the first bending portion And a plurality of second side surfaces and a plurality of second bending portions corresponding to the first and second bending portions.

The first side surfaces and the second side surfaces may be disposed to correspond to a plurality of third side surfaces of the outdoor unit body, and air inlet holes may be formed in the third side surfaces.

The first heat exchanger and the second heat exchanger are mounted on the bottom surface of the outdoor unit main body and the lower end of the first heat exchanger and the lower end of the second heat exchanger are arranged to contact the bottom surface of the main body .

In addition, the bottom surface may have a fan hole around the first heat exchanger, and the outdoor fan may include a first fan disposed in the fan hole.

In addition, the first fan may be configured to supply air upward toward the first space inside the first heat exchanger.

Further, the outdoor unit main body may be provided with a plurality of legs extending downward from the bottom surface.

In addition, by driving the first fan, the outside air supplied from the lower side of the outdoor unit body flows through the first space, the second space between the first heat exchanger and the second heat exchanger, And can be guided to the upper side of the outdoor unit main body through the air flow path.

Further, the second heat exchanger may extend higher than the first heat exchanger, and the upper end of the first heat exchanger may be covered by the cover.

The outdoor fan may further include a second fan disposed at an upper end of the second heat exchanger.

The upper end of the second heat exchanger may be covered by a fan housing, and the second fan may be disposed at the center of the fan housing.

In addition, by driving the second fan, the outside air supplied from the side surfaces of the outdoor unit main body passes through the second air passage passing through the second space between the first heat exchanger and the second heat exchanger, As shown in FIG.

The first heat exchanger and the second heat exchanger may be formed in the form of a hollow column.

According to another aspect of the present invention, there is provided an indoor unit comprising: an indoor unit having an indoor heat exchanger configured to exchange heat with indoor air; An outdoor unit having an outdoor heat exchanger configured to exchange heat with outdoor air; A compressor for discharging the refrigerant toward the indoor heat exchanger or the outdoor heat exchanger based on the operation mode; And an expansion valve for expanding a refrigerant flowing into a heat exchanger of an evaporator of the indoor heat exchanger and the outdoor heat exchanger, wherein the outdoor heat exchanger comprises: an outdoor unit main body; A first heat exchanger provided in the outdoor unit body and formed in a hollow pillar shape; And a second heat exchanger disposed between the outdoor unit main body and the first heat exchanger and formed in a hollow pillar shape.

At this time, the first heat exchanger is formed in a hollow prismatic shape having four first side surfaces, the second heat exchanger is formed in a hollow prism shape having four second side surfaces, The second sides may be arranged to face each other.

In addition, the outdoor unit main body has four third side surfaces, air inlet holes are formed in each of the third side surfaces, and the second side surfaces are disposed between the first side surfaces and the third side surfaces. have.

The height of the first heat exchanger may be less than the height of the second heat exchanger, and the upper end of the first heat exchanger may be covered with a cover.

The outdoor unit may include a first fan disposed at the center of the bottom surface of the outdoor unit main body and configured to supply air upward through the hollow portion of the first heat exchanger; And a second fan disposed at an upper end of the second heat exchanger.

At this time, when the first fan and the second fan are driven, the air supplied from the lower side of the outdoor unit main body and the air supplied from the side surface of the outdoor unit main body are merged in the space between the first heat exchanger and the second heat exchanger And can be discharged to the upper side of the outdoor unit main body.

According to the present invention, it is possible to provide an outdoor unit and an air conditioner including the outdoor unit that can reduce the flow rate and the flow rate of air passing through a plurality of outdoor heat exchangers and increase the heat exchange efficiency.

In addition, according to the present invention, it is possible to provide an outdoor unit capable of increasing heat exchange efficiency between air and refrigerant by preventing the outside air from sequentially passing through a plurality of outdoor heat exchangers, and an air conditioner including the outdoor unit.

Further, according to the present invention, it is possible to provide an outdoor unit and an air conditioner including the outdoor unit, wherein the heat exchange area of the outdoor heat exchanger is increased but the increase in the overall width of the outdoor unit can be minimized.

1 is a view showing a conventional outdoor unit having a plurality of outdoor heat exchangers.
FIG. 2 shows a refrigerant flow chart in the cooling mode of the air conditioner according to the present invention.
FIG. 3 shows a refrigerant flow chart in the heating mode of the air conditioner according to the present invention.
4 is a perspective view of an outdoor unit according to an embodiment of the present invention.
5 is an exploded perspective view showing the interior of the outdoor unit shown in Fig.
6 is a view showing the first outdoor heat exchanger and the second outdoor heat exchanger provided in the outdoor unit shown in FIG.
Fig. 7 shows the bottom surface of the outdoor unit shown in Fig. 4. Fig.
8 is a view for explaining the flow of air in the outdoor unit shown in FIG.

Hereinafter, an air conditioner according to the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In addition, the same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown may be exaggerated or reduced have.

FIG. 2 shows a refrigerant flow chart in the cooling mode of the air conditioner according to the present invention.

2, the air conditioner according to the present invention includes a compressor 100, an indoor heat exchanger 400, an expansion valve 300, and an outdoor heat exchanger 200. In the illustrated embodiment, "I" represents an indoor unit and "O" represents an outdoor unit.

The compressor 100 is formed to compress the refrigerant. That is, the compressor 100 may be formed so as to pressurize the refrigerant at a low temperature and to make the refrigerant at high temperature and high pressure. At least one of the compressors 100 may be provided in the air conditioner 10.

In the illustrated embodiment, two compressors 100 are provided, and two compressors are provided in parallel along the flow direction of the refrigerant. Alternatively, a plurality of compressors may be provided in series along the flow direction of the refrigerant.

The indoor heat exchanger 400 may be formed to exchange heat with indoor air. That is, the indoor heat exchanger 400 may be configured to exchange heat between indoor air and refrigerant flowing into the indoor heat exchanger 400.

For example, the indoor heat exchanger 400 may perform the function of the evaporator in the cooling mode of the air conditioner 100 and the function of the condenser in the heating mode.

The outdoor heat exchanger 200 may be formed to exchange heat with outdoor air. That is, the outdoor heat exchanger 200 may be configured to exchange heat between the outdoor air and the refrigerant flowing into the outdoor heat exchanger 200.

A plurality of outdoor heat exchangers 200 may be provided. At this time, the outdoor heat exchangers 200 may be arranged in series or in parallel in the flow direction of the refrigerant.

In the illustrated embodiment, the outdoor heat exchanger 200 includes a first heat exchanger 210 and a second heat exchanger 220, and the first heat exchanger 210 and the second heat exchanger 220 And may be arranged in parallel with respect to the flow direction of the refrigerant.

For example, the outdoor heat exchanger 200 performs a function of a condenser in a cooling mode of the air conditioner 100, and a function of an evaporator in a heating mode.

The indoor heat exchanger (400) and the outdoor heat exchanger (200) may be a fin-tube type heat exchanger. In addition, an indoor fan (not shown) may be provided on the indoor heat exchanger 400 side, and an outdoor fan (not shown) may be provided on the outdoor heat exchanger 200 side.

The expansion valve 300 may be configured to expand the refrigerant. In the illustrated embodiment, two expansion valves 300 may be provided to correspond to the first heat exchanger 210 and the second heat exchanger 220. The two expansion valves 300 may be provided in parallel with the flow direction of the refrigerant.

That is, the expansion valve 300 may include a first expansion valve 310 and a second expansion valve 320 arranged in parallel. The first expansion valve 310 may be disposed in series with the first heat exchanger 210 and the second expansion valve 320 may be disposed in series with the second heat exchanger 220.

The air conditioner may include an accumulator 170 for separating refrigerant flowing into the compressor 100 into gaseous refrigerant and liquid refrigerant. Only the gaseous refrigerant can be introduced into the compressor 100 via the accumulator 170 before the refrigerant is introduced into the compressor 100.

The air conditioner (10) may include a flow path switching valve (150) for switching the circulation direction of the refrigerant when the cooling mode and the heating mode are switched. The flow path switching valve 150 may be formed as a four-way valve.

For example, the channel switching valve 150 may be configured to guide the refrigerant discharged from the compressor 100 to the outdoor unit in the cooling mode and to guide the refrigerant discharged from the compressor 100 to the indoor unit in the heating mode.

2, in the cooling mode, the refrigerant discharged from the compressor 100 is guided to the outdoor heat exchanger 200 through the flow path switching valve 150. As shown in FIG.

The refrigerant condensed by heat exchange with outdoor air in the outdoor heat exchanger 200 may be expanded through the expansion valve 300 and then guided toward the indoor heat exchanger 400. In the illustrated embodiment, the refrigerant heat exchanged with outdoor air in the first heat exchanger 210 and the second heat exchanger 220 arranged in parallel can be expanded through two expansion valves 300 arranged in parallel .

The refrigerant is evaporated in the indoor heat exchanger 400 to cool the indoor air, and can be guided to the compressor 100 again through the flow path switching valve 150 and the accumulator 170 in sequence.

Hereinafter, the flow of the refrigerant in the heating mode of the air conditioner will be described with reference to other drawings.

FIG. 3 shows a refrigerant flow chart in the heating mode of the air conditioner according to the present invention.

3, in the heating mode, the refrigerant discharged from the compressor 100 is guided to the indoor heat exchanger 400 through the flow path switching valve 150. As shown in FIG.

The refrigerant in the indoor heat exchanger 400 can heat indoor air by exchanging heat with indoor air. The refrigerant condensed in the indoor heat exchanger 400 may be guided to the outdoor unit O side, expanded by the expansion valve 300, and then guided toward the outdoor heat exchanger 200.

The refrigerant vaporized in the outdoor heat exchanger 200 can be guided to the compressor 100 again through the passage switching valve 150 and the accumulator 170 in sequence.

2 and 3, the compressor 100 may discharge the refrigerant toward the indoor heat exchanger 400 or the outdoor heat exchanger 200 based on the operating mode of the air conditioner.

The expansion valve 300 may be formed or arranged to expand the refrigerant introduced into the heat exchanger of the indoor heat exchanger 400 and the outdoor heat exchanger 200 as an evaporator.

On the other hand, the shape and arrangement of the plurality of outdoor heat exchangers are closely related to the heat exchange efficiency of the outdoor heat exchanger.

Hereinafter, the characteristics of the outdoor unit and the outdoor heat exchanger for enhancing the heat exchange efficiency between the outdoor air and the refrigerant in the outdoor heat exchanger will be described in detail with reference to other drawings.

FIG. 4 is a perspective view of an outdoor unit according to an embodiment of the present invention, FIG. 5 is an exploded perspective view illustrating the interior of the outdoor unit shown in FIG. 4, FIG. 6 is a cross- And the second outdoor heat exchanger.

4 to 6 together, the outdoor unit O includes an outdoor unit main body 20, an outdoor heat exchanger 200 provided in the outdoor unit main body 20, and outdoor air introduced into the outdoor unit main body 20, And outdoor fans (500, 600) for discharging the air to the outside of the outdoor unit body (20) through the heat exchanger (200).

The compressor 100, the flow path switching valve 150, the accumulator 170 and the expansion valve 300 shown in FIGS. 2 and 3 may be provided in a separate machine room (not shown) from the outdoor unit body 20.

The outdoor heat exchanger 200 may be configured to heat-exchange outdoor air with refrigerant. In the illustrated embodiment, the outdoor heat exchanger 200 may include a first heat exchanger 210 and a second heat exchanger 220 provided in the outdoor unit body 20 to exchange heat with outside air.

At this time, the second heat exchanger 220 may be spaced apart from the first heat exchanger 210 to surround the first heat exchanger 210.

The outdoor fans 500 and 600 may be configured to introduce outside air into the outdoor unit main body 20 to exchange heat with the first heat exchanger 210 and the second heat exchanger 220.

That is, the outdoor fans 500 and 600 introduce outside air to the inside of the outdoor unit main body 20 and communicate with the outside of the outdoor unit main body 20 through the first heat exchanger 210 and the second heat exchanger 220 As shown in Fig.

Referring to FIG. 6, the first heat exchanger 210 may include a plurality of first bends 212 formed between a plurality of first side surfaces 211 and adjacent first side surfaces 211, have.

The plurality of first side surfaces 211 may be disposed along the circumferential direction of the first heat exchanger 210.

5 and 6, the second heat exchanger 220 includes a plurality of first side surfaces 211 and a plurality of second side surfaces 221 (corresponding to the plurality of first bends 212) And a plurality of second bent portions 222.

That is, the plurality of second side surfaces 221 may be disposed along the circumferential direction of the second heat exchanger 220.

The plurality of second side surfaces 221 may be disposed to face the plurality of first side surfaces 211 and the plurality of second bending portions 222 may be disposed to face the plurality of first bending portions 211, respectively.

The first heat exchanger 210 and the second heat exchanger 220 may be formed as hollow columns. For example, the first heat exchanger 210 and the second heat exchanger 220 may have a rectangular prism shape. In the illustrated embodiment, both the first heat exchanger 210 and the second heat exchanger 220 may be formed as hollow quadrangular prisms.

Accordingly, the first heat exchanger 210 may include four first side surfaces 211, and the second heat exchanger 220 may include four second side surfaces 221. At this time, the four first side surfaces 211 may be arranged to face the four second side surfaces 221.

The height of the first heat exchanger 210 may be less than or equal to the height of the second heat exchanger 220. In the illustrated embodiment, the height of the first heat exchanger 210 is lower than the height of the second heat exchanger 220.

That is, the second heat exchanger 220 may extend higher than the first heat exchanger 210.

4 and 5, the side surface of the outdoor unit body 20 may be formed of a plurality of third side surfaces 25. As shown in FIG. At this time, the first side surfaces 211 and the second side surfaces 221 described above may be disposed to correspond to the third side surfaces 25.

That is, the first side surfaces 211 of the first heat exchanger 210 and the second side surfaces 221 of the second heat exchanger 220 are parallel to the third side surfaces 25 of the outdoor unit body 20 .

More specifically, the second side surfaces 221 may be disposed between the first side surfaces 211 and the third side surfaces 25.

At this time, air inlet holes 27 may be formed in the third side surfaces 25, respectively. For example, each of the third side surfaces 35 may have a plurality of air inflow holes 27 formed therein. Therefore, the outside air can be introduced into the outdoor unit body 20 through the air inflow hole 27.

The first heat exchanger 210 and the second heat exchanger 220 may be seated on the bottom surface 23 of the outdoor unit body 20. The lower end of the first heat exchanger 210 and the lower end of the second heat exchanger 220 may be disposed in contact with the bottom surface 23 of the main body 20.

A fan hole 501 may be formed on the bottom surface 23. The fan hole 501 may provide a space for installing the first fan 500, which will be described later.

Specifically, the bottom surface 23 may be provided with a fan hole 501 having a smaller circumference than the circumference of the first heat exchanger 210. At this time, the outdoor fans 500 and 600 may include a first fan 500 disposed in the fan hole 501.

For example, Fig. 7 shows the bottom surface of the outdoor unit shown in Fig. 7, the fan hole 501 may be formed at the center of the bottom surface 23 and the diameter of the fan hole 501 may be smaller than the diameter of the first heat exchanger 210.

Meanwhile, the first fan 500 may be configured to supply air toward the first space S1 inside the first heat exchanger 210. That is, the first space S1 is formed in the hollow portion of the first heat exchanger 210, and the first fan 500 installed on the bottom surface 23 is positioned upward As shown in Fig.

The external air supplied to the first space S1 may exchange heat with the refrigerant in the first heat exchanger 210 while passing through the first heat exchanger 210. [

Referring to FIG. 4, the outdoor unit main body 20 may be provided with a plurality of legs 29 for separating the outdoor unit main body 20 upward from the installation surface.

The plurality of legs 29 may extend downwardly from the bottom surface 23.

The first fan 500 installed on the bottom surface 23 and the bottom surface 23 by the legs 29 may be spaced upward from the installation surface of the outdoor unit main body 20.

Therefore, when the first fan 500 is driven, external air can be supplied from the lower side of the bottom surface 23 toward the first space S1.

The second heat exchanger 220 may extend higher than the first heat exchanger 210 and the cover 250 may be provided at an upper end of the first heat exchanger 210. That is, the upper end of the first heat exchanger 210 may be covered by the cover 250.

Therefore, when the first fan 500 is driven, the outside air introduced into the first space S1 passes through the plurality of first side surfaces 211 of the first heat exchanger 210, 1 heat exchanger 210 to the second space S2 between the first heat exchanger 210 and the second heat exchanger 220.

Specifically, the second space S2 may represent a space between the first side surfaces 211 of the first heat exchanger 210 and the second side surfaces 221 of the second heat exchanger 220 have.

The outdoor fans 500 and 600 may further include a second fan 600 disposed at an upper end of the second heat exchanger 220.

For example, referring to FIG. 5, a fan housing 650 may be provided at an upper end of the second heat exchanger 220, and the second fan 600 may be installed at the fan housing 650. That is, the upper end of the second heat exchanger 220 may be covered by the fan housing 650, and the second fan 600 may be disposed at the center of the fan housing 650.

External air can be introduced into the interior of the outdoor unit body (20) by being driven by the second fan (600) and discharged to the upper part of the outdoor unit body (20).

A grill 21 may be disposed on the upper portion of the second fan 600. That is, the grill 21 is provided on the upper surface of the outdoor unit body 20, and may be disposed on the upper side of the second fan 600.

The grill (21) prevents foreign matter falling from the upper side of the second fan (600) from flowing into the outdoor unit body (20).

Meanwhile, the first fan 500 and the second fan 600 may be formed as axial flow fans. The first fan 500 and the second fan 600 may be driven simultaneously or selectively.

Referring to FIG. 6, a first slit 213 may be formed at one corner of the first heat exchanger 210. The first slits 213 may extend in the height direction of the first heat exchanger 210. A first refrigerant distributor (not shown) may be disposed in the first slit 213.

Also, the second slit 223 may be formed at one corner of the second heat exchanger 220. The second slits 223 may extend in the height direction of the second heat exchanger 220. A second refrigerant distributor (not shown) may be disposed in the second slit 223.

Hereinafter, the flow of air due to the driving of the first fan 500 and the second fan 600 will be described with reference to other drawings.

8 is a view for explaining the flow of air in an outdoor unit according to an embodiment of the present invention.

5 and 8 together show that the external air supplied from the lower side of the outdoor unit body 20 by sequentially driving the first space 500 and the second space S2, The air can be guided to the upper side of the outdoor unit main body 20 through the first air passage F1 passing through the first air passage F1.

That is, when the first fan 500 is driven, the outside air is sequentially guided from the lower side of the outdoor unit main body 20 to the first space S1 and the second space S2, Heat exchange with the first heat exchanger 210 can be performed in the process of moving from the first space S1 to the second space S2.

At this time, the first air passage F1 may mean a passage along the direction of an arrow indicated by a dotted line in FIG.

The external air supplied from the side surfaces of the outdoor unit main body 20 flows into the outdoor unit main body 20 through the second air flow passage F2 passing through the second space S2 by driving the second fan 500. [ As shown in Fig.

That is, when the second fan 500 is driven, the outside air is guided to the second space S2 through the side surfaces of the outdoor unit body 20, and the outside air is guided to the second space S2 The heat exchange with the second heat exchanger 220 can be performed.

At this time, the second air passage F2 may mean a passage along the direction of the arrow shown by the solid line in FIG.

The first fan 500 and the second fan 600 may be simultaneously or selectively driven to guide outside air along the first air passage F1 and the second air passage F2 However, it is preferable that the first fan 500 and the second fan 600 are simultaneously driven in order to secure the air flow rate and the flow rate and increase the heat exchange efficiency.

That is, when only one of the first fan 500 and the second fan 600 is driven, the outside air may be out of the path along the first air passage F1 and the second air passage F2, The flow rate and the flow rate can not be secured and the heat exchange efficiency may be lowered.

Alternatively, when the first fan 500 and the second fan 600 are driven simultaneously, the outside air is guided to the path along the first air passage F1 and the second air passage F2, The heat exchange efficiency can be increased according to securing the flow rate.

When the first fan 500 and the second fan 600 are driven, the air supplied from the lower side of the outdoor unit main body 20 and the air supplied from the side surfaces of the outdoor unit main body are supplied to the first heat exchanger 210 and the second heat exchanger 220 and may be discharged to the upper side of the outdoor unit main body 20. [

As described above, according to the present invention, it is possible to prevent the decrease of the flow rate and the flow rate of the air passing through the plurality of outdoor heat exchangers, thereby increasing the heat exchange efficiency.

In addition, according to the present invention, it is possible to increase the heat exchange efficiency between air and refrigerant by allowing the air introduced through the separated air inlets to pass through the respective outdoor heat exchangers without the external air sequentially passing through the plurality of outdoor heat exchangers have.

Further, according to the present invention, the heat exchange area of the outdoor heat exchanger provided in the outdoor unit main body can be increased without increasing the size of the outdoor unit main body.

The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention, And additions should be considered as falling within the scope of the following claims.

100 compressor 150 Euro switching valve
170 accumulator 200 outdoor heat exchanger
210 First heat exchanger 220 Second heat exchanger
300 Expansion valve 400 Indoor heat exchanger
500 First fan 600 Second fan

Claims (19)

An outdoor unit main body;
A first heat exchanger provided in the outdoor unit body to exchange heat with outdoor air;
A second heat exchanger provided in the outdoor unit body for exchanging heat with outside air, the second heat exchanger being spaced apart from the first heat exchanger and surrounding the first heat exchanger; And
And an outdoor fan that introduces outside air into the inside of the outdoor unit main body and discharges the outside air to the outside of the outdoor unit body through the first heat exchanger and the second heat exchanger,
Wherein the first heat exchanger and the second heat exchanger are seated on a bottom surface of the outdoor unit main body and the lower end of the first heat exchanger and the lower end of the second heat exchanger are disposed in contact with the bottom surface of the main body,
Wherein the outdoor fan is disposed in a fan hole formed on the bottom surface around the first heat exchanger to supply air upward to the first space inside the first heat exchanger, And a second fan provided at an upper end of the second fan,
The outside air supplied from the lower side of the outdoor unit main body by the driving of the first fan passes through the first space and the second space between the first heat exchanger and the second heat exchanger sequentially, To the upper side of the outdoor unit main body,
The outside air supplied from the side surfaces of the outdoor unit main body is guided to the upper side of the outdoor unit main body through the second air passage passing through the second space between the first heat exchanger and the second heat exchanger by the driving of the second fan And the outdoor unit. The method according to claim 1,
Wherein the first heat exchanger has a plurality of first bends formed between a plurality of first side surfaces and neighboring first side surfaces,
Wherein the second heat exchanger includes a plurality of second side surfaces and a plurality of second bending portions corresponding to the plurality of first side surfaces and the first bending portions. 3. The method of claim 2,
Wherein the first side surfaces and the second side surfaces are arranged to correspond to a plurality of third side surfaces provided in the outdoor unit body,
And air inlet holes are formed in the third side surfaces. delete delete delete The method according to claim 1,
Wherein the outdoor unit body is provided with a plurality of legs extending downward from the bottom surface. delete The method according to claim 1,
Wherein the second heat exchanger extends higher than the first heat exchanger,
And an upper end of the first heat exchanger is covered by a cover. delete The method according to claim 1,
Wherein an upper end of the second heat exchanger is covered by a fan housing, and the second fan is disposed at the center of the fan housing. delete 3. The method of claim 2,
Wherein the first heat exchanger and the second heat exchanger are each formed in a hollow pillar shape. An indoor unit having an indoor heat exchanger configured to exchange heat with indoor air;
An outdoor heat exchanger including a first heat exchanger provided in the outdoor unit main body and formed in a hollow pillar shape and a second heat exchanger disposed between the outdoor unit main body and the first heat exchanger and formed in the form of a hollow column, An outdoor unit having a first fan provided at a center of a bottom surface of the main body and configured to supply air upward through a hollow portion of the first heat exchanger, and a second fan provided at an upper end of the second heat exchanger;
A compressor for discharging the refrigerant toward the indoor heat exchanger or the outdoor heat exchanger based on the operation mode; And
And an expansion valve for expanding the refrigerant flowing into the heat exchanger of the indoor heat exchanger and the outdoor heat exchanger,
When the first fan and the second fan are driven, the air supplied from the lower side of the outdoor unit body and the air supplied from the side surface of the outdoor unit body join together in the space between the first heat exchanger and the second heat exchanger, And is discharged to the upper side of the outdoor unit main body. 15. The method of claim 14,
Wherein the first heat exchanger is formed in a hollow prismatic shape having four first side faces and the second heat exchanger is formed in a hollow prism shape having four second side faces,
Wherein the first side surfaces and the second side surfaces are disposed to face each other. 16. The method of claim 15,
Wherein the outdoor unit body has four third side surfaces, air inlet holes are formed in each of the third side surfaces,
And the second side surfaces are disposed between the first side surfaces and the third side surfaces. 15. The method of claim 14,
The height of the first heat exchanger is equal to or less than the height of the second heat exchanger,
Wherein an upper end of the first heat exchanger is covered with a cover. delete delete

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