CN111486515A - Outdoor unit of air conditioner - Google Patents

Abstract

The invention discloses an outdoor unit of an air conditioner, wherein a mounting cavity is formed in a shell, an air outlet is formed at the top of the shell, a fan is arranged in the mounting cavity and is opposite to the air outlet, an electrical box is arranged at the side close to the mounting cavity and is positioned below the fan, and the thickness of the part of the electrical box far away from the fan is larger than that of the part of the electrical box close to the fan. The electrical apparatus box is the convergent structure of lower thick upper strata thinness, and when gaseous when flowing through the electrical apparatus box, the side of electrical apparatus box orientation installation chamber side plays the water conservancy diversion effect to gaseous, helps reducing the hindrance of electrical apparatus box to the air current, reduces the air inlet windage of fan. The arrangement of the side close to the electric appliance box also reduces the overlapping area of the electric appliance box and the fan, further reduces the air inlet wind resistance of the fan and is beneficial to the flow of air.

Description

Outdoor unit of air conditioner

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to a top-outlet air conditioner outdoor unit.

Background

For the air conditioner outdoor unit with top air outlet, the electrical box is placed in the heat exchanger cavity, and the fan is placed at the air outlet at the top, so that the thickness and the installation position of the electrical box can hinder the air outlet to a certain extent for the air duct system of the whole air conditioner. According to the experimental and simulation results, the existing electrical box can cause air quantity attenuation. For heat exchangers of the same area, the reduction of the air volume can cause the reduction of the capacity of the heat exchanger, thereby reducing the energy efficiency of the air conditioning system.

Present electrical apparatus box is mostly circuit board tiling type electrical apparatus box, though the overall arrangement of inside circuit board is different, has all made and has transversely can hold two circuit boards, and the form that two-layer circuit board can be held to the depth direction. For example, the inside part of electrical apparatus box is the left and right sides, and the drive plate is placed to one side, and main control board and filtering board are placed to the opposite side, have just so led to the whole width and the thickness of electrical apparatus box all great. The appliance cases with large width and thickness impede the flow of wind to some extent. Due to the requirements of ventilation and heat dissipation, the electric appliance box is basically arranged at a position close to the fan, and the closer the electric appliance box is to the fan, the larger the influence on the air volume is.

Disclosure of Invention

In some embodiments of the present application, an outdoor unit of an air conditioner is provided, which optimizes the structure and installation manner of an electrical box so as to achieve the purposes of reducing noise, improving energy efficiency and improving heat dissipation performance of the electrical box.

In some embodiments of the present application, there is provided an outdoor unit of an air conditioner, including: the air conditioner comprises a shell, a fan and a fan, wherein a mounting cavity is formed in the shell, and an air outlet is formed in the top of the shell; the fan is arranged in the mounting cavity and is opposite to the air outlet; further comprising: and the electrical box is arranged on the side close to the mounting cavity and below the fan, and the thickness of the portion, far away from the fan, of the electrical box is larger than that of the portion, close to the fan, of the electrical box. The electrical apparatus box is the convergent structure of lower thick upper strata thinness, and when gaseous when flowing through the electrical apparatus box, the side of electrical apparatus box orientation installation chamber side plays the water conservancy diversion effect to gaseous, helps reducing the hindrance of electrical apparatus box to the air current, reduces the air inlet windage of fan. The arrangement of the side close to the electric appliance box also reduces the overlapping area of the electric appliance box and the fan, further reduces the air inlet wind resistance of the fan and is beneficial to the flow of air.

In some embodiments of the application, the air guide ring is arranged at the top of the shell and comprises a connecting part, a throat part and a necking part, the throat part is located between the connecting part and the necking part, the diameter of the necking part is smaller than that of the connecting part, the connecting part is connected with the shell, the necking part forms an air outlet, and the fan is arranged in the installation cavity and partially located in the air guide ring, wherein the range of the distance L1 between the intersection connecting part of the throat part and the connecting part and the tail edge of the fan is 0.75-1 times of the height of the fan, and since the L1 area is a main area where the fan and the air guide ring do work, a large number of wingtip vortexes can be generated at the outer edge of the fan, and by reasonably setting the L1 size, the vortex noise at the position can be reduced, and further the noise of the whole machine.

In some embodiments of the present application, the indoor unit of an air conditioner further includes a support portion disposed in the mounting cavity for mounting the fan, wherein a distance L2 between a tip of the fan and the support portion is not less than 40mm, so that airflow impact noise can be effectively reduced.

In some embodiments of this application, support portion includes two crossbeams, the motor of fan with crossbeam fixed connection, simple structure can enough satisfy the installation demand of fan, can make the air current comparatively smoothly pass through support portion again, reduces the air inlet resistance of fan.

In some embodiments of the present application, the cross-sectional shape of the beam along the air-out direction is an S-shape, which improves the strength of the beam.

In some embodiments of this application, still be equipped with the heat exchanger in the installation cavity, the heat exchanger is U type heat exchanger, the one end of crossbeam with the casing is connected, the other end is connected with U type heat exchanger, and U type heat exchanger's heat transfer area is bigger, and the flow field is more even in the installation cavity.

In some embodiments of the present application, the distance L3 from the trailing edge of the fan to the top of the throat is in the range of 20-40mm, which provides the best air flow and noise performance.

In some embodiments of the present application, the throat portion is located on a circular arc surface having a radius in the range of 25-65 °.

In some embodiments of the present application, the distance L4 between the blade tip of the fan and the top surface of the electrical box is greater than 0.5 times of the height of the fan, which is helpful to increase the effective air intake area of the fan and increase the air volume.

In some embodiments of this application, the top surface of electrical apparatus box is along the inboard downward sloping of horizontal plane orientation installation cavity, the contained angle between top surface and the horizontal plane is greater than 4, is favorable to improving gas mobility.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view illustrating a structure of an outdoor unit for an air conditioner according to an embodiment;

fig. 2 is a sectional view of an outdoor unit for an air conditioner according to an embodiment;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

fig. 5 is a schematic structural view of an outdoor unit of an air conditioner without a wind guide ring according to an embodiment;

FIG. 6 is a schematic structural diagram of a first cross member for mounting a fan according to an embodiment;

FIG. 7 is a top view of FIG. 5;

fig. 8 is a schematic view illustrating a flow of air in an outdoor unit of an air conditioner according to an embodiment;

FIG. 9 is a schematic structural diagram of an appliance box according to an embodiment;

FIG. 10 is a schematic view of a mounting configuration of an appliance cartridge within a mounting cavity according to an embodiment;

fig. 11 is noise comparison data between the outdoor unit according to the embodiment and the outdoor units according to other embodiments at the same air volume;

fig. 12 is power comparison data between the outdoor unit according to the embodiment and the outdoor unit according to another embodiment at the same air volume.

Reference numerals:

100-shell, 110-bracket part, 111-first beam, 120-second beam, 130-vertical beam, 140-air outlet, 150-protective cover, 160-installation cavity;

200-fan, 210-fan blade, 220-motor;

300-an electrical box, 310-a first installation space, 320-a second installation space, 330-a front side plate, 340-a peripheral side plate, 350-a step part, 360-a flanging part, 370-a hanging part, 381-a main control circuit board, 382-a filter circuit board, 383-a driving circuit board, 384-a reactor, 385-a terminal row, 391-an air inlet hole and 392-an air outlet hole;

400-wind guide ring, 410-connecting part, 420-throat part and 430-necking part;

500-a heat exchanger;

600-a compressor;

l1-distance between the trailing edge of the fan and the junction where the junction meets the throat;

l2-distance between tip of fan and first beam;

l3-distance between the trailing edge of the fan and the top of the throat;

l4-distance between the tip of the fan and the top surface of the appliance box;

r 1-radius of arc surface where throat is located;

r 2-radius of the arc surface at the corner of the top of the electrical box;

a-the difference in thickness between the lower and upper portions of the appliance box;

theta-the angle between the top surface of the electrical box and the horizontal plane P.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

[ basic operation principle of air conditioner ]

The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

[ outdoor unit of air conditioner ]

The outdoor unit of the air conditioner in the present application is a top-outlet type, and fig. 1 and 2 show a single-fan top-outlet type outdoor unit of the air conditioner.

The present application has carried out systematic research on the installation position between fan 200 and wind-guiding ring 400, the installation position between fan 200 and electrical apparatus box 300, the structure and installation of wind-guiding ring 400 itself, and the structure and installation of electrical apparatus box 300 itself, etc., in order to achieve the purposes of reducing noise and improving energy efficiency.

The outdoor unit of an air conditioner includes a casing 100 constituting an outer contour of the outdoor unit, and an installation cavity 160 formed therein for installing components such as a compressor 600, a fan 200, an appliance box 300, and a heat exchanger 500.

In some embodiments of the present disclosure, the wind guiding ring 400 is fixedly disposed on the top of the casing 100, and the wind guiding ring 400 is used for guiding out the air in the installation cavity 160 under the blowing action of the fan 200. Referring to fig. 2, the wind-guiding ring 400 includes a connecting portion 410, a throat portion 420 and a throat portion 430, the throat portion 420 is located between the connecting portion 410 and the throat portion 430, the connecting portion 410 is fixedly connected to the top of the casing 100, and the throat portion 430 forms the wind outlet 140. The air guiding ring 400 with a wide lower part and a narrow lower part is beneficial to guiding out air.

The top of the throat 430 is fixedly provided with a protective cover 150 to prevent impurities such as external fallen leaves from entering the installation cavity 160.

The fan 200 is fixedly arranged in the mounting cavity 160, and part of the fan 200 is positioned in the air guide ring 400, and the air guide ring 400 plays a role in guiding and pressurizing, so that the energy efficiency and gas discharge of the fan 200 are improved.

In some embodiments of the present application, with continued reference to FIG. 2, a distance L1 between the intersection of throat 420 and junction 410 and the trailing edge of fan 200 ranges from 0.75 to 1 times the height of fan 200.

L1 area is the main area where fan 200 and wind-guiding ring 400 do work, since the outer edge of fan 200 will generate a lot of winged tip vortex, L1 improper size design will cause the winged tip vortex to interact with wind-guiding ring 400 to generate a lot of eddy noise, L1 is preferably 0.78 times the height of the fan, where the best effect of air volume and noise is obtained.

In some embodiments of the present application, referring to fig. 2 and 5, a bracket portion 110 is fixedly disposed at the top of the mounting cavity 160, the bracket portion 110 is used for mounting the fan 200, a distance L2 between a blade tip of the fan 200 and the bracket portion 110 is not less than 40mm, when the fan 200 rotates rapidly, the airflow will rapidly pass through the bracket portion 110, where noise of airflow impact is generated, an increase of airflow noise is caused due to an improper size design of L2, when L2 is greater than or equal to 40mm, the noise of airflow impact can be effectively reduced, in this embodiment, L2 is preferably 60 mm.

In some embodiments of the present application, the bracket portion 110 includes two beams (defined as a first beam 111) spaced apart from each other, and the motor 220 of the fan is fixedly connected to the first beam 111, so as to achieve the fixed installation of the fan 200. The first cross beams 111 arranged at two intervals are simple in structure, the installation requirements of the fan can be met, air flow can smoothly pass through the support part, and air inlet resistance of the fan is reduced.

Referring to fig. 6, the cross-sectional shape of the first cross beam 111 along the air outlet direction is S-shaped, and the S-shaped structure ensures the installation strength of the first cross beam 111, and at the same time, enables the first cross beam 111 to have a narrow width, thereby further reducing the wind resistance.

In some embodiments of the present application, referring to fig. 2, the distance L3 from the trailing edge of the fan 200 to the top end of the throat 430 is in the range of 20-40mm, where the air volume and noise effect is the best, L3 is preferably 25mm in this embodiment.

In some embodiments of the present application, with reference to fig. 2, the radius r1 of the arc surface where the throat portion 420 is located is an important factor influencing the air flow flowing into the wind guiding ring 400 from the fan 200, and the size of r1 directly influences the air output and noise in the wind guiding ring 400. In this embodiment, the optimal value range of r1 is 25-65 °, preferably 35 °, at which time the air volume and noise effect are optimal.

In some embodiments of the present application, referring to fig. 7, the heat exchanger 500 is fixedly disposed in the installation cavity 160, and the heat exchanger 500 in the present application is a U-shaped heat exchanger, compared to an L-shaped heat exchanger, a heat exchange area of the U-shaped heat exchanger is larger, a flow field in the installation cavity 160 is more uniform, one end of the first cross beam 111 is fixedly connected to the housing 100, and the other end of the first cross beam is fixedly connected to a top end of the U-shaped heat exchanger.

[ Electrical apparatus case ]

The structure and the installation mode of the electrical box 300 are optimized so as to achieve the purposes of reducing noise, improving energy efficiency, improving heat dissipation performance of the electrical box and the like, and the detailed description is given below.

Referring to fig. 2, 4 and 8, the electrical box 300 is fixedly disposed at an edge side of the mounting cavity 160 and below the fan 200, a portion of the electrical box 300 away from the fan 200 has a thickness greater than a portion of the electrical box 300 close to the fan 200, that is, a portion of the electrical box 300 at a lower portion has a thickness greater than a portion of the electrical box 300 at an upper portion, the electrical box 300 has a tapered structure with a thicker lower portion and a thinner upper portion, and a thickness difference is formed between the upper portion and the lower portion of the electrical box 300, which is marked as a.

When the air flows through the electrical box 300, the side surface of the electrical box 300 facing the installation cavity 160 side guides the air, which is helpful for reducing the obstruction of the electrical box 300 to the air flow and reducing the air inlet wind resistance of the fan 200.

The electrical box 300 is arranged close to the side, so that the overlapping area of the electrical box 300 and the fan 200 is reduced, the air inlet wind resistance of the fan 200 is further reduced, and the air flow is facilitated.

In some embodiments of the present application, referring to fig. 7, the electrical box 300 is disposed at a side of the mounting cavity 160 near the corner, at this time, an overlapping area C between the electrical box 300 and the fan 200 is minimized, and an air intake resistance of the electrical box 300 to the fan 200 is minimized.

In some embodiments of the present application, referring to fig. 8 and 9, the electrical box 300 is formed by processing sheet metal, and the side plates constituting the electrical box 300 are defined as a front side plate 330 and a peripheral side plate 340, the peripheral side plate 340 is disposed around the front side plate 330, and the front side plate 330 faces the side of the installation cavity 160. The first and second installation spaces 310 and 320 are formed in the inner space of the electrical box 300 from bottom to top, the first installation space 310 is located below the second installation space 320, and the thickness of the first installation space 310 is greater than that of the second installation space 320. The main control circuit board 381 and the filter circuit board 382 are arranged in the first installation space 310 side by side, the main control circuit board 381 and the filter circuit board 382 are at the same horizontal height, and the driving circuit board 382 is arranged in the second installation space 320.

A double-layer circuit board is arranged in the first installation space 310, and a single-layer circuit board is arranged in the second installation space 320, so that the structural form of the electrical box 300 with the lower part thick and the upper part thin is matched, and reasonable installation of internal components is realized. The double-layer circuit board is also beneficial to the air flow flowing through the interior of the electric appliance box 300 to have a good heat dissipation effect on the components.

Meanwhile, the electrical box 300 thus designed is a slim type structure, that is, the height of the electrical box 300 in the vertical direction is greater than the width thereof in the horizontal direction. When the elongated electrical box 300 is disposed in the mounting cavity 160, the blocking area of the ventilation path for the airflow is small, which helps to further reduce the wind resistance of the fan 200, and facilitates the flow of the air.

With continued reference to fig. 9, the bottom of the first mounting space 310 is provided with the terminal block 385, and the top of the second mounting space 320 is provided with the reactor 384, so that the electrical box 300 is designed to facilitate the internal wiring.

In some embodiments of the present application, referring to fig. 4, the side plate defining the first installation space 310 and the side plate 320 defining the second installation space form a step 350 at a junction facing the installation cavity 160, that is, the front side plate 330 located outside the first installation space 310 and the front side plate 330 located outside the second installation space 320 form a step 350 at the junction, and the step 350 is inclined downward toward the installation cavity 160 in a horizontal direction. Referring to fig. 8, when the gas flows through the front plate 330, the step portion 350 guides the gas to facilitate the gas flow.

In some embodiments of the present application, referring to fig. 8 and 9, the bottom of the electrical box 300 is provided with an air inlet 391, and the top of the electrical box 300 is provided with an air outlet 392 facing the side of the mounting cavity 160. The air at the bottom of the electrical box 300 flows through the first installation space 310 and the second installation space 320 in sequence through the air inlet holes 391 to dissipate heat of the internal components, and then flows to the fan 200 side through the air outlet holes 392, so that the heat dissipation effect of the electrical box 300 is improved.

In some embodiments of the present application, referring to fig. 3, the top surface of the electrical box 300 is inclined downward along the horizontal plane P toward the inner side of the mounting cavity 160, which is beneficial for improving the gas fluidity. In this embodiment, the angle θ between the top surface and the horizontal plane P is greater than 4 °, preferably 6 °.

In some embodiments of the present application, with continued reference to fig. 3, the top of the electrical box 300 is designed to be a rounded structure toward the corner of the side of the mounting cavity 160, and the radius of the rounded corner is marked as r2, so that on the premise that the internal component mounting condition is satisfied, the larger r2 is, the better the gas flowability in this region is.

In some embodiments of the present application, referring to fig. 2, the distance L between the blade tip of the fan 200 and the top surface of the electrical box 300 is greater than 0.5 times of the height of the fan 200, which is helpful to increase the effective air intake area of the fan 200 and increase the air volume, the reason for such design is that the closer the electrical box 300 is to the fan 200, the higher the ambient air flow velocity is, by specifying a reasonable installation distance L, the too narrow ventilation path near the fan 200 can be avoided to reduce or even eliminate the influence of the electrical box 300 on the air volume, but L being too large results in the electrical box 300 being too close to the bottom of the housing 100, and there are problems of unsmooth ventilation, poor waterproof and dustproof effects, inconvenient maintenance, and the like, and thus the electrical box cannot be too close to the.

In this embodiment, the value range of L4 is 115-145mm, and within this distance range, the requirements of ventilation, dust prevention and water prevention of the electrical box 300 can be met, and the extrusion of the upper part of the electrical box 300 to the airflow channel near the fan 200 can be reduced, that is, the obstruction to the airflow is reduced.

In some embodiments of the present application, referring to fig. 10, the housing 100 includes a cross beam (defined as a second cross beam 120) and a vertical beam 130, a top of the electrical box 300 is connected to the second cross beam 120, and a side of the electrical box 300 is connected to the vertical beam 130, so as to achieve a fixed installation of the electrical box 300 in the installation cavity 160.

Referring to fig. 9, the peripheral side plate 340 of the electrical box 300 is provided with a flanging portion 360, and the flanging portion 360 may be fixedly connected to the vertical beam 130 by screws. The top of electrical apparatus box 300 is equipped with hitching part 370, for example the couple, and hitching part 370 can dismantle with second crossbeam 120 and articulate, the dismouting of being convenient for.

[ noise contrast and power contrast between the optimized outdoor unit of air conditioner and the outdoor units of air conditioners in other schemes under the same air volume ]

The outdoor unit of the air conditioner optimized by the present application has the same frame size as other embodiments, and under the condition that the same fan and motor are adopted, the noise and power under the same air volume are contrastively analyzed, and the contrastively analyzed data shown in fig. 11 and 12 are obtained, wherein fig. 11 is the noise contrast data under the same air volume, and fig. 12 is the power contrast data under the same air volume.

As can be seen from fig. 11, the noise of the optimized outdoor unit of the air conditioner and the noise of the outdoor unit of the air conditioner in other schemes under the ventilation volume can be reduced by at least 5 db.

As can be seen from fig. 12, the power of the optimized outdoor unit of the present application and the outdoor units of other solutions can be reduced by at least 18.9% under the ventilation capacity.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An outdoor unit for an air conditioner, comprising:

the air conditioner comprises a shell, a fan and a fan, wherein a mounting cavity is formed in the shell, and an air outlet is formed in the top of the shell;

the fan is arranged in the mounting cavity and is opposite to the air outlet;

it is characterized by also comprising:

and the electrical box is arranged on the side close to the mounting cavity and below the fan, and the thickness of the portion, far away from the fan, of the electrical box is larger than that of the portion, close to the fan, of the electrical box.

2. The outdoor unit of claim 1, wherein,

the electric appliance box is characterized in that a first installation space and a second installation space are formed in the electric appliance box from bottom to top, the thickness of the first installation space is larger than that of the second installation space, a main control circuit board and a filter circuit board are arranged in the first installation space side by side, and a driving circuit board is arranged in the second installation space.

3. The outdoor unit of claim 2, wherein,

the bottom of the first installation space is provided with a terminal strip, and the top of the second installation space is provided with a reactor.

4. The outdoor unit of claim 2, wherein,

the side plates which enclose the first installation space and the side plates which enclose the second installation space form a step part at the intersection connection part facing the installation cavity side, and the step part is downwards inclined towards the installation cavity side along the horizontal direction.

5. The outdoor unit of any one of claims 1 to 4, wherein,

the bottom of the electrical box is provided with an air inlet hole, and the top of the electrical box is provided with an air outlet hole facing the side of the mounting cavity.

6. The outdoor unit of any one of claims 1 to 4, wherein,

the distance between the blade tip of the fan and the top surface of the electrical box is more than 0.5 times the height of the fan.

7. The outdoor unit of any one of claims 1 to 4, wherein,

the top surface of the electrical box inclines downwards towards the inner side of the mounting cavity along the horizontal plane.

8. The outdoor unit of any one of claims 1 to 4, wherein,

the electrical box is arranged on one side of the mounting cavity close to the corner.

9. The outdoor unit of claim 8, wherein,

the shell comprises a cross beam and a vertical beam, the top of the electrical box is connected with the cross beam, and the side edge of the electrical box is connected with the vertical beam.

10. The outdoor unit of claim 9, wherein,

the top of electrical apparatus box is equipped with hitching part, hitching part with the crossbeam can be dismantled and articulate.

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