CN219913271U - Air conditioner outdoor unit - Google Patents

Abstract

The utility model discloses an air conditioner outdoor unit, which belongs to the technical field of air conditioners, and comprises a shell, a heat exchanger, a fan, an air guide ring and a noise reduction shell; the shell is internally provided with a containing cavity, and is provided with an air inlet and an air outlet which are communicated with the containing cavity; the heat exchanger is arranged in the accommodating cavity and is close to the air inlet; the fan is arranged in the accommodating cavity and is positioned at one side of the heat exchanger, which is away from the air inlet; the air guide ring is positioned at the air outlet and connected with the shell, and the inner side of the air guide ring is contacted with air flow flowing out of the air outlet so as to guide air flow; the air guide ring is provided with a noise reduction hole, the noise reduction hole is positioned in the accommodating cavity, and the opening direction of the noise reduction shell is intersected with the opening direction of the air outlet; the noise reduction shell is positioned in the accommodating cavity and connected to one side of the air guide ring, which is away from the airflow; the noise reduction shell and the air guide ring jointly define a noise reduction cavity, and the noise reduction cavity is communicated with the noise reduction hole; the air conditioning outdoor unit can reduce noise generated in the air flowing process and has good reducing effect.

Description

Air conditioner outdoor unit

Technical Field

The utility model relates to the technical field of air conditioners, in particular to an air conditioner outdoor unit.

Background

Although the air conditioner outdoor unit is installed outdoors, noise generated during the operation of the air conditioner outdoor unit still causes little trouble to people's life. The noise source of the air conditioner outdoor unit is mainly the operation noise and the fan noise of the compressor pipeline system. For the former, the air conditioner outdoor unit generally adopts a sound insulation cover with a sound absorption felt and a sound insulation material to control the noise of the compressor, and the noise control means of the fan is less, which is mainly because the fan cannot be sealed like the compressor, and the noise caused by the fan can be directly radiated into the air.

In order to reduce noise generated in the working process of the air conditioner, some manufacturers set through holes on the fan wind guide ring, so that the inner wall of the wind guide ring and the external space form a resonance sound absorption system to reduce fan noise, but because only one resonance cavity is arranged, the resonance sound absorption structure has a noise reduction effect only aiming at specific frequency and surrounding narrower frequency bands, and can not control noise of other frequency bands; the diameter of the through hole on the wind guiding ring is designed to be lower than 1m m, the noise reduction purpose is realized based on the microperforation sound absorption principle, the scheme can widen the sound absorption frequency band width to a certain extent, but the microperforation sound absorption principle is adopted to realize the noise reduction, the diameter of the through hole on the wind guiding ring, the penetration rate (the ratio of the total area of the through hole to the circumferential side area of the wind guiding ring) of the wind guiding ring and the installation space requirement of the wind guiding ring are all very strict, the noise reduction effect can only be realized on the noise in a specific frequency band range, and the through hole with the diameter lower than 1m m has high cost in actual mass production.

In the prior art, noise generated by the operation of the air conditioner outdoor unit is subjected to noise reduction treatment of the air guide ring, so that the noise can have a larger influence on a user, and the user experience is reduced.

Disclosure of Invention

Aiming at the defects existing in the related art, the utility model provides an air conditioner outdoor unit to solve the problem of high noise generated by the operation of the air conditioner outdoor unit in the prior art.

The utility model provides an air conditioner outdoor unit, comprising:

the shell is internally provided with a containing cavity, and is provided with an air inlet and an air outlet which are communicated with the containing cavity;

the heat exchanger is arranged in the accommodating cavity and is close to the air inlet;

the fan is arranged in the accommodating cavity and is positioned at one side of the heat exchanger, which is away from the air inlet;

the air guide ring is positioned at the air outlet and connected with the shell, and the inner side of the air guide ring is contacted with air flow flowing out of the air outlet so as to guide air flow; the air guide ring is provided with a noise reduction hole, the noise reduction hole is positioned in the accommodating cavity, and the opening direction of the noise reduction shell is intersected with the opening direction of the air outlet;

the noise reduction shell is positioned in the accommodating cavity and connected to one side of the air guide ring, which is away from the airflow; the noise reduction shell and the air guide ring jointly define a noise reduction cavity, and the noise reduction cavity is communicated with the noise reduction hole;

through fan operation, the air current that will flow through the wind-guiding circle is by making an uproar hole is introduced into the chamber of making an uproar and is fallen the processing of making an uproar in the chamber of making an uproar, flows out the holding chamber by the air outlet.

According to the technical scheme, the air guide ring is arranged at the air outlet, so that air can be guided to flow out of the casing; noise reduction holes are formed in the air guide ring, so that noise generated when air flows out of the interior of the shell from the air outlet can be reduced; through setting up the shell of making an uproar falls, utilize the connecting portion of shell of making an uproar and wind-guiding circle of making an uproar to make an uproar falls in hole and the chamber intercommunication of making an uproar falls, in order to reduce the noise that the air flow produced.

In some embodiments, the wind guiding ring comprises a first guiding part, a connecting part and a second guiding part, wherein the first guiding part is connected with the connecting part and is positioned outside the accommodating cavity, and the second guiding part is connected with one end of the connecting part away from the first guiding part and is positioned in the accommodating cavity; the connecting part is positioned in the accommodating cavity and provided with a noise reduction hole; the inner side of the connecting part is contacted with the air flowing through the air guide ring.

In some embodiments, a noise-reducing shell cavity is arranged inside the noise-reducing shell, the noise-reducing shell cavity is provided with an opening, and the connecting part is connected to the opening of the noise-reducing shell cavity so as to jointly define a containing cavity with the noise-reducing shell; the noise reduction hole is formed at the joint of the connecting part and the noise reduction shell.

In some embodiments, the connecting portion is connected with a plurality of noise reduction shells, the noise reduction shells are uniformly distributed along the peripheral direction of the connecting portion, and a space is reserved between two adjacent noise reduction shells.

In some embodiments, a noise reduction baffle is arranged in the noise reduction cavity, the noise reduction baffle divides the noise reduction cavity into a first noise reduction cavity and a second noise reduction cavity, and the first noise reduction cavity is arranged close to the connecting part; the noise reduction partition plate is provided with a partition plate through hole, and the first noise reduction cavity is communicated with the second noise reduction cavity through the partition plate through hole.

In some embodiments, the baffle through holes are disposed in correspondence with the noise reduction holes.

In some embodiments, the diameter of the end of the first guide portion outside the casing exceeds the diameter of the end of the first guide portion connected to the connecting portion; the diameter value range of one end of the second guiding part outside the shell exceeds the diameter value range of one end of the second guiding part connected with the connecting part.

In some embodiments, the first guide portion and the second guide portion smoothly transition with the connecting portion, respectively.

In some embodiments, a housing baffle is arranged in the accommodating cavity, the housing baffle divides the accommodating cavity into a first cavity and a second cavity, and the fan and the heat exchanger are positioned in the first cavity; the second cavity is internally provided with a compressor, and the compressor is connected with the heat exchanger through a refrigeration pipeline.

In some embodiments, the fan is disposed within the receiving cavity by a fan connection; one end of the fan connecting piece is connected with the heat exchanger, one end of the fan connecting piece is connected with the shell, and the fan is rotationally connected to the fan connecting piece.

Based on the technical scheme, the air-conditioner outdoor unit in the embodiment of the utility model can guide air to flow out of the interior of the shell by arranging the air guide ring at the air outlet; noise reduction holes are formed in the air guide ring, so that noise generated when air flows out of the interior of the shell from the air outlet can be reduced; the noise reducing shell is arranged, the noise reducing cavity is formed by the noise reducing shell and the connecting part of the air guide ring, and the noise reducing hole is communicated with the noise reducing cavity so as to reduce noise generated by air flow; the noise reduction effect is good and the noise reduction method is simple.

Drawings

Fig. 1 is a schematic view illustrating a structure of an embodiment (without an air outlet grill) of an outdoor unit of an air conditioner according to the present utility model;

fig. 2 is a schematic view illustrating another angle of an embodiment (without an air outlet grill) of an outdoor unit of an air conditioner according to the present utility model;

fig. 3 is a schematic view illustrating a forward structure of an embodiment (without an air outlet grill) of an outdoor unit of an air conditioner according to the present utility model;

FIG. 4 is a schematic view showing an assembly structure of a casing and a wind-guiding ring in an embodiment of an outdoor unit of an air conditioner according to the present utility model;

fig. 5 is a schematic view illustrating a structure of a casing in an embodiment of an outdoor unit of an air conditioner according to the present utility model;

fig. 6 is a schematic view illustrating a structure in which components installed inside a cabinet are assembled in an embodiment of an outdoor unit of an air conditioner according to the present utility model;

fig. 7 is a schematic view illustrating a structure of a fan connector assembled with a front panel and a heat exchanger in an embodiment of an outdoor unit of an air conditioner according to the present utility model;

FIG. 8 is a schematic view showing the structure of an outdoor unit of an air conditioner according to an embodiment of the present utility model at another angle when components installed inside a cabinet are assembled;

fig. 9 is a schematic view illustrating a structure of a blower coupling member assembled with a base plate in an embodiment of an outdoor unit of an air conditioner according to the present utility model;

FIG. 10 is an enlarged view of the structure of FIG. 9A;

fig. 11 is a schematic view illustrating a structure of an outdoor unit of an air conditioner according to an embodiment of the present utility model when a partition is assembled with a base plate;

fig. 12 is a schematic view illustrating a structure of an outdoor unit of an air conditioner according to an embodiment of the present utility model when a condensation duct is assembled with a base plate;

fig. 13 is a schematic view illustrating a structure of an air guide ring assembled with a front panel in an embodiment of an outdoor unit of an air conditioner according to the present utility model;

fig. 14 is a schematic view illustrating another angle of the air guide ring and the front panel when assembled in an embodiment of the outdoor unit of the present utility model;

fig. 15 is a schematic structural view of a wind guide ring in an embodiment of an outdoor unit of an air conditioner according to the present utility model;

FIG. 16 is a schematic view showing a semi-sectional structure of a wind guide ring in an embodiment of an outdoor unit of an air conditioner according to the present utility model;

FIG. 17 is a schematic view showing a semi-sectional structure of an air guide ring according to another exemplary embodiment of the outdoor unit of the present utility model;

FIG. 18 is an enlarged view of the structure at B in FIG. 17;

FIG. 19 is a schematic view showing a semi-sectional structure of an air guide ring according to another exemplary embodiment of the outdoor unit of the present utility model;

fig. 20 is an enlarged view of the structure at C in fig. 19.

In the drawing the view of the figure,

1. a housing; 2. an air guide ring; 3. a blower; 4. an outdoor heat exchanger; 5. a compressor; 6. a gas-liquid separator; 7. a noise reduction shell; 8. supercooling coil;

11. a top cover; 12. a front panel; 13. an air inlet; 14. a bottom plate; 15. a housing connection; 16. a side plate; 17. a housing partition; 18. a first chamber; 19. a second chamber;

121. an air outlet; 131. an air inlet grille; 141. the bottom plate is raised;

21. a first guide portion; 22. a connection part; 23. a second guide portion; 221. a noise reduction hole;

31. a fan connector;

71. a noise reduction baffle; 72. a noise reduction cavity; 73. a notch;

711. a separator through hole; 721. a first noise reduction cavity; 722. a second noise reduction cavity;

81. and a fixing piece.

Detailed Description

For the purposes of making the objects and embodiments of the present utility model more apparent, an exemplary embodiment of the present utility model will be described in detail below with reference to the accompanying drawings in which exemplary embodiments of the present utility model are illustrated, it being apparent that the exemplary embodiments described are only some, but not all, of the embodiments of the present utility model.

It should be noted that the brief description of the terminology in the present utility model is for the purpose of facilitating understanding of the embodiments described below only and is not intended to limit the embodiments of the present utility model. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms "first," second, "" third and the like in the description and in the claims and in the above drawings are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to all elements explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

As shown in fig. 1 to 20, in an exemplary embodiment of the air conditioner outdoor unit of the present utility model, the air conditioner outdoor unit includes a cabinet 1, an outdoor heat exchanger 4, a blower 3, a wind guide ring 2, and a noise reduction case 7.

As shown in fig. 1 to 5, the casing 1, i.e., an outdoor unit casing, defines an outer contour of an air conditioner outdoor unit, which is generally rectangular parallelepiped; the shell 1 is provided with a top and a bottom, the top of the shell 1 and the bottom of the shell 1 are opposite ends, the height direction of the shell 1 is from the top of the shell 1 to the bottom of the shell 1, the front side of the shell 1 and the rear side of the shell 1 are opposite sides, and the thickness direction of the shell 1 is from the front side of the shell 1 to the rear side of the shell 1; the left side of the shell 1 and the right side of the shell 1 are opposite sides, and the width direction of the shell 1 is from the left side of the shell 1 to the right side of the shell 1; the machine shell 1 comprises a top cover 11, a bottom plate 14, a front panel 12 and two side plates 16, wherein the top cover 11 is arranged opposite to the bottom plate 14 and correspondingly positioned at the top and the bottom of the machine shell 1, the front panel 12 is positioned at the front side of the machine shell 1, and the two side plates 16 are correspondingly positioned at the left side and the right side of the machine shell 1; the housing 1 is internally provided with a containing cavity, the housing 1 is provided with an air inlet 13 and an air outlet 121, the air inlet 13 and the air outlet 121 are respectively communicated with the containing cavity, so that air outside the housing 1 enters the containing cavity from the air inlet 13, and air in the containing cavity flows out of the containing cavity from the air outlet 121; the air inlet 13 is at least arranged on the side plate 16 positioned on the left side of the shell 1, and the air outlet 121 is arranged on the front panel 12; an air inlet grille 131 is arranged on the air inlet 13, and an air outlet grille is arranged on the air outlet 121; the air inlet grille 131 is mainly used for preventing dust from entering the accommodating cavity, and the air outlet grille is mainly used for protecting components arranged in the accommodating cavity so as to prevent objects outside the casing 1 from extending into the accommodating cavity from the air outlet 121; the chassis 14 is connected to a chassis connector 15, and the chassis 1 is fixed by the chassis connector 15.

As shown in fig. 6, the outdoor heat exchanger 4 and the fan 3 are installed in the accommodating cavity, the outdoor heat exchanger 4 is arranged close to the air inlet 13, and the outdoor heat exchanger 4 extends along the height direction of the casing 1 so as to increase the heat exchange area for exchanging heat with air; the fan 3 is positioned at one side of the outdoor heat exchanger 4, which is away from the air inlet 13, and the outside air of the shell 1 is led into the accommodating cavity through the air inlet 13 by the operation of the fan 3, and heat exchange is carried out through the outdoor heat exchanger 4 to form heat exchange air flow, and the heat exchange air flow is outwards output through the air outlet 121 under the operation drive of the fan 3; as shown in fig. 7, the fan 3 is rotatably connected to the fan connector 31, the fan connector 31 extends along the height direction of the casing 1, the upper end of the fan connector 31 is connected to the outdoor heat exchanger 4, and the lower end of the fan connector 31 is connected to the bottom plate 14, so that the fan 3 is disposed in the accommodating cavity.

In practical application, the air conditioner outdoor unit and the air conditioner indoor unit together form an air conditioner, the air conditioner indoor unit comprises an indoor heat exchanger, the indoor heat exchanger and the outdoor heat exchanger are used as a condenser or an evaporator, when the indoor heat exchanger is used as the condenser, the outdoor heat exchanger 4 is used as the evaporator, and the air conditioner executes a heating mode; when the indoor heat exchanger is used as an evaporator, the outdoor heat exchanger 4 is used as a condenser, and the air conditioner performs a cooling mode. The air conditioner outdoor unit further comprises a compressor 5, the compressor 5 is arranged in the accommodating cavity, one end of the compressor 5 is connected with the outdoor heat exchanger 4 through a pipeline, and the other end of the compressor 5 is connected with the indoor heat exchanger through a pipeline, so that a refrigerant circularly flows between the outdoor heat exchanger 4 and the indoor heat exchanger, and refrigeration or heating of the air conditioner is achieved.

The air conditioner performs a refrigerating cycle of the air conditioner by using the compressor 5, the expansion valve, the condenser, and the evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged. The compressor 5 compresses 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 5. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle. The blower 3 in the air conditioner outdoor unit can accelerate the flow rate of the wind flowing through the outdoor heat exchanger 4, so that the heat exchange efficiency of the outdoor heat exchanger 4 can be improved.

The refrigeration working principle of the air conditioner is as follows: the compressor 5 works to enable the interior of the indoor heat exchanger (in the indoor unit, the evaporator at the moment) to be in an ultra-low pressure state, liquid refrigerant in the indoor heat exchanger is rapidly evaporated to absorb heat, air blown out by the indoor fan 3 is cooled by the indoor heat exchanger coil and then changed into cold air to be blown into the room, the evaporated refrigerant is pressurized by the compressor 5 and then condensed into liquid state in the high-pressure environment in the outdoor heat exchanger 4 (in the outdoor unit, the condenser at the moment) to release heat, and the heat is emitted into the atmosphere by the outdoor fan 3, so that the refrigerating effect is achieved by circulation.

The heating working principle of the air conditioner is as follows: the gaseous refrigerant is pressurized by the compressor 5 to become high-temperature and high-pressure gas, and enters the indoor heat exchanger (a condenser at the moment), so that the gaseous refrigerant is condensed, liquefied and released heat to become liquid, and meanwhile, the indoor air is heated, so that the aim of improving the indoor temperature is fulfilled. The liquid refrigerant is decompressed by the throttle device, enters the outdoor heat exchanger 4 (an evaporator in this case), evaporates and gasifies to absorb heat, becomes gas, absorbs heat of outdoor air (the outdoor air becomes colder), becomes a gaseous refrigerant, and enters the compressor 5 again to start the next cycle.

Because the compressor 5 cannot well realize gas-liquid separation of the refrigerant, in some embodiments, the air conditioner outdoor unit is further provided with a gas-liquid separator 6, and the gas-liquid separator 6 is communicated with the compressor 5 and is used for performing gas-liquid separation on the refrigerant so as to provide refrigerant gas for the compressor 5, and the gas-liquid separator 6 separates the refrigerant returned to the compressor 5 from the evaporator into gas and liquid, and only returns the gas to the compressor 5, thereby preventing the liquid refrigerant from entering the compressor 5 and avoiding liquid impact of the compressor 5; the gas-liquid separator 6 is fixedly disposed on the bottom plate 14 and is disposed in the accommodating chamber, and a vibration damping member such as rubber is disposed between the gas-liquid separator 6 and the bottom plate 14 to reduce vibration.

As shown in fig. 6, 8 and 9, a casing partition 17 is arranged in the accommodating cavity, the casing partition 17 divides the accommodating cavity into a first cavity 18 and a second cavity 19 which are arranged left and right, wherein the first cavity 18 is communicated with an air outlet 121 and an air inlet 13, an outdoor heat exchanger 4 and a fan 3 are arranged in the first cavity 18, and a compressor 5 and a gas-liquid separator 6 are arranged in the second cavity 19; outside air of the casing 1 is introduced into the first cavity 18 from the air inlet 13 through operation of the blower 3, and heat exchange is performed through the outdoor heat exchanger 4 to form heat exchange airflow, and the heat exchange airflow is output from the air outlet 121 under operation driving of the blower 3.

Specifically, the air flow outside the casing 1 can be led into the accommodating cavity inside the casing 1 through the air inlet 13 by the operation of the fan 3, and as a refrigerant circulation loop is formed between the outdoor heat exchanger 4 and the indoor heat exchanger, the outdoor heat exchanger 4 can perform heat exchange with the air flow led into the casing 1 by the fan 3, and after the heat exchange air flow is formed by the outdoor heat exchanger 4 and the air flow led into the casing 1 by the fan 3, the heat exchange air flow is led out from the air outlet 121 by the operation of the fan 3, so that the normal operation of the air conditioner outdoor unit and the whole air conditioner is ensured.

The outdoor unit of the air conditioner, as shown in fig. 10 to 12, further includes a supercooling coil 8, where the supercooling coil 8 is located in the first cavity 18 and is bent on the bottom plate 14, so that the supercooling coil 8 can be distributed on the bottom plate 14 more comprehensively, and thus the bottom plate 14 can be better defrosted and deicing, and the problem that newly generated condensed water cannot be timely discharged due to blockage of a drain outlet on the bottom plate 14 caused by freezing of the condensed water is avoided; the supercooling coil 8 is one of a copper pipe, an aluminum pipe, and a stainless steel pipe. Firstly, the structural strength of the materials of the copper pipe, the aluminum pipe and the stainless steel pipe is high, the copper pipe, the aluminum pipe and the stainless steel pipe are not easy to damage, and the heat conduction performance of the copper pipe, the aluminum pipe and the stainless steel pipe is high, so that the refrigerant in the supercooling coil pipe 8 can conduct heat transfer better; it should be further noted that, the bottom plate 14 is provided with the bottom plate protrusion 141, so that a groove is formed between adjacent bottom plate protrusions 141, at least a portion of the supercooling coil 8 is disposed in the groove, so that the setting of the supercooling coil 8 on the base is more stable and firm, and the groove is also the position where ice is most likely to form during the heating mode, so that the supercooling coil 8 can better remove ice at the groove; moreover, the bottom plate protrusion 141 is fixedly coupled to the lower end of the blower fan coupling member 31 so that the blower fan coupling member 31 is coupled to the bottom plate 14; in addition, the subcooling coil 8 is fixedly connected to the bottom plate 14 by a fixing member 81.

As shown in fig. 13 and 14, an air guide ring 2 is arranged at the air outlet 121, the air guide ring 2 is installed on the casing 1, the inner side of the air guide ring 2 is contacted with air flowing out of the accommodating cavity from the air outlet 121, and the outer side of the air guide ring 2 is contacted with the casing 1 to guide air in the accommodating cavity to the outside of the casing 1; the wind guide ring 2 comprises a first guide part 21, a connecting part 22 and a second guide part 23, wherein the first guide part 21 is connected with the connecting part 22 and is positioned outside the accommodating cavity, and the connecting part 22 is positioned in the accommodating cavity; the second guide part 23 is connected with one end of the connecting part 22 far away from the first guide part 21 and is positioned in the accommodating cavity, the first guide part 21 and the second guide part 23 are oppositely arranged, the first guide part 21, the connecting part 22 and the second guide part 23 jointly define a wind guiding ring cavity, an opening of the wind guiding ring cavity is arranged far away from the connecting part 22, and the outer edge of the air outlet 121 is arranged in the wind guiding ring cavity so as to enable the wind guiding ring 2 to be clamped in the machine shell 1; the inner diameter of the end of the first guide portion 21 connected to the connecting portion 22 is smaller than the inner diameter of the end of the first guide portion far from the connecting portion 22; the inner diameter of the end, connected with the connecting part 22, of the second guide part 23 is smaller than the inner diameter of the end, far away from the connecting part 22, of the second guide part; the first guide portion 21 and the second guide portion 23 are respectively smoothly transitioned with the connecting portion 22 to better guide the first air flowing out of the first chamber 18.

As a great amount of noise is generated when the air flows, as shown in fig. 13 and 14, in order to reduce the noise generated by the air flow, the air conditioner outdoor unit is provided with noise reducing holes 221 in the air guide ring 2 to absorb and reduce the noise of the air flow flowing through the air guide ring 2; the noise reduction hole 221 is formed on the inner side of the connection portion 22, and the inner side of the connection portion 22 is in contact with the air flow flowing through the air guide ring 2.

In order to further increase the noise reduction effect of the noise reduction hole 221, as shown in fig. 15 and 16, the noise reduction shell 7 is connected to the outer side of the connecting portion 22, the noise reduction shell 7 is located in the accommodating cavity and defines a noise reduction cavity 72 together with the connecting portion 22, and the noise reduction cavity 72 is communicated with the noise reduction hole 221 so as to reduce noise generated by air flow by using the microperforated sound absorption principle; it should be noted that the principle of micro-perforation sound absorption belongs to the common general knowledge technology in the art, and is not described herein.

As shown in fig. 17, the noise reduction shell 7 is internally provided with a noise reduction shell cavity having an opening, and the noise reduction shell cavity opening is connected with the connecting portion 22 so that the noise reduction shell 7 and the connecting portion 22 together define a closed noise reduction cavity 72; the noise reduction hole 221 is formed at the joint of the connecting part 22 and the noise reduction shell 7, so that air enters the noise reduction cavity 72 from the noise reduction hole 221 and rubs with the outer edge of the noise reduction hole 221, so that sound energy is converted into heat energy, and according to the law of conservation of energy, the heat energy is increased, and the sound energy is reduced, so that noise generated by air flow is reduced; and a part of sound energy enters the noise reduction cavity 72 and cannot return to the air outlet 121 of the accommodating cavity through the noise reduction hole 221, so that the noise at the air outlet 121 is reduced.

As shown in fig. 17 and 18, a noise reduction baffle 71 is provided in the noise reduction chamber 72, the noise reduction baffle 71 divides the noise reduction chamber 72 into a first noise reduction chamber 721 and a second noise reduction chamber 722, the first noise reduction chamber 721 and the second noise reduction chamber 722 are arranged in parallel and the first noise reduction chamber 721 is arranged near the connecting portion 22; the noise reduction partition 71 is provided with a partition through hole 711, the first noise reduction cavity 721 is communicated with the second noise reduction cavity 722 through the partition through hole 711, the noise reduction cavity 72 is partitioned into the first noise reduction cavity 721 and the second noise reduction cavity 722 by the noise reduction partition 71, so that air enters the first noise reduction cavity 721 from the noise reduction hole 221, and air enters the second noise reduction cavity 722 from the partition through hole 711 in the first noise reduction cavity 721, thereby increasing the noise reduction effect on the air; note that, the partition through holes 711 are disposed corresponding to the noise reduction holes 221, so that air passes through the noise reduction holes 221 and the partition through holes 711 to enter the second noise reduction chamber 722; because the air flow velocity in the first noise reduction chamber 721 is low, if the partition through holes 711 and the noise reduction holes 221 are distributed in a staggered manner, the difficulty of the air in the first noise reduction chamber 721 entering the second noise reduction chamber 722 through the partition through holes 711 increases, and the noise reduction effect of the second noise reduction chamber 722 is reduced.

As shown in fig. 19 and 20, the connecting portion 22 is connected with a plurality of noise reduction shells 7, the noise reduction shells 7 are uniformly distributed along the peripheral direction of the connecting portion 22, and a certain distance is provided between two adjacent noise reduction shells 7, and a notch 73 is formed at the periphery of the connecting portion 22, so that the noise reduction cavities 72 formed by the noise reduction shells 7 and the connecting portion 22 are independently arranged, a plurality of noise reduction cavities 72 are formed at the periphery of the connecting portion 22, and the noise reduction effect is further increased.

The thickness of the connecting portion 22 ranges from 0.5mm to 2mm, the diameter of the noise reduction hole 221 ranges from 1mm to 5mm, and the depth of the noise reduction cavity 72 ranges from 1mm to 50mm; it should also be noted that noise generated during the air flow process includes, but is not limited to, noise generated during the operation of the blower 3; in addition, the air conditioner indoor unit can reduce the noise by about 1dB under the same air volume, and can obviously reduce the peak noise of BPF (namely, the air vortex noise generated by scavenging of the fan 3 blades) by 2 times and 3 times.

The working principle of the air conditioner outdoor unit is as follows: through the operation of the fan 3, the external air of the casing 1 is introduced into the first cavity 18, and heat exchange air flow is formed through the heat exchange treatment of the outdoor heat exchanger 4, when the heat exchange air flow flows out of the first cavity 18 from the air outlet 121 and flows through the air guide ring 2, the heat exchange air flow enters the first noise reduction cavity 721 from the noise reduction holes 221 for primary noise reduction treatment, and the air flow entering the first noise reduction cavity 721 enters the second noise reduction cavity 722 from the baffle through holes 711 for secondary noise reduction, so that noise generated when the air flow flows out of the first cavity 18 from the air outlet 121 is reduced.

The air conditioner outdoor unit can guide air to flow out of the interior of the shell 1 by arranging the air guide ring 2 at the air outlet 121; noise generated when air flows out of the interior of the casing 1 from the air outlet 121 can be reduced by providing the noise reduction holes 221 in the air guide ring 2; by providing the noise reduction case 7, the noise reduction cavity 72 is formed by the noise reduction case 7 and the connection part 22 of the wind guide ring 2 together, and the noise reduction hole 221 is communicated with the noise reduction cavity 72, so as to reduce noise generated by air flow; the air conditioner outdoor unit has good noise reduction effect, simple and compact structure and convenient arrangement.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims (10)

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

the shell is internally provided with a containing cavity, and is provided with an air inlet and an air outlet which are communicated with the containing cavity;

the heat exchanger is arranged in the accommodating cavity and is close to the air inlet;

the fan is arranged in the accommodating cavity and is positioned at one side of the heat exchanger, which is away from the air inlet;

the air guide ring is positioned at the air outlet and connected with the shell, and the inner side of the air guide ring is contacted with air flow flowing out of the air outlet so as to guide air to flow; the air guide ring is provided with a noise reduction hole, and the noise reduction hole is positioned in the accommodating cavity;

the noise reduction shell is positioned in the accommodating cavity and connected to one side, away from the airflow, of the air guide ring, and the opening direction of the noise reduction shell is intersected with the opening direction of the air outlet; the noise reduction shell and the wind guide ring jointly define a noise reduction cavity, and the noise reduction cavity is communicated with the noise reduction hole;

and the air flow flowing through the air guide ring is guided into the noise reduction cavity through the noise reduction holes to be subjected to noise reduction treatment by the fan, and then flows out of the accommodating cavity through the air outlet.

2. The outdoor unit of claim 1, wherein the air guide ring comprises a first guide part, a connecting part and a second guide part, the first guide part is connected with the connecting part and positioned outside the accommodating cavity, and the second guide part is connected with one end of the connecting part away from the first guide part and positioned in the accommodating cavity; the connecting part is positioned in the accommodating cavity and provided with the noise reduction hole; the inner side of the connecting part is contacted with the air flowing through the air guide ring.

3. The outdoor unit of claim 2, wherein a noise-reducing housing cavity is provided inside the noise-reducing housing, the noise-reducing housing cavity has an opening, and the connecting portion is connected to the opening of the noise-reducing housing cavity to define the accommodating cavity together with the noise-reducing housing; the noise reduction hole is formed in the joint of the connecting part and the noise reduction shell.

4. The outdoor unit of claim 3, wherein the connection part is connected with a plurality of the noise reduction cases, the noise reduction cases being uniformly distributed along the outer circumferential direction of the connection part with a space left between two adjacent noise reduction cases.

5. The outdoor unit of claim 3, wherein a noise reduction partition plate is disposed in the noise reduction chamber, the noise reduction partition plate divides the noise reduction chamber into a first noise reduction chamber and a second noise reduction chamber, and the first noise reduction chamber is disposed near the connection part; the noise reduction partition plate is provided with a partition plate through hole, and the first noise reduction cavity is communicated with the second noise reduction cavity through the partition plate through hole.

6. The outdoor unit of claim 5, wherein the partition through holes are provided corresponding to the noise reduction holes.

7. The outdoor unit of claim 3, wherein a diameter of an end of the first guide portion located outside the casing is greater than a diameter of an end of the first guide portion connected to the connection portion; the diameter value range of one end of the second guide part, which is positioned at the outer side of the shell, exceeds the diameter value range of one end, which is connected with the connecting part, of the second guide part.

8. The outdoor unit of claim 7, wherein the first guide portion and the second guide portion smoothly transition with the connection portion, respectively.

9. The outdoor unit of claim 8, wherein a housing partition is disposed in the housing chamber, the housing partition dividing the housing chamber into a first chamber and a second chamber, the blower and the heat exchanger being disposed in the first chamber; and a compressor is arranged in the second cavity and is connected with the heat exchanger through a refrigeration pipeline.

10. The outdoor unit of claim 1, wherein the fan is disposed in the accommodating chamber through a fan connection member; one end of the fan connecting piece is connected with the heat exchanger, one end of the fan connecting piece is connected with the shell, and the fan is rotationally connected with the fan connecting piece.