Air conditioner outdoor unit

Abstract

The utility model discloses an air conditioner outdoor unit, and belongs to the technical field of air conditioners. The air conditioner outdoor unit comprises a machine shell, an air inlet is formed in the side face of the machine shell, and an air outlet is formed in the top end of The outdoor heat exchanger is arranged in the machine shell corresponding to the air inlet; the outdoor fan is arranged between the outdoor heat exchanger and the air outlet and used for blowing air subjected to heat exchange through the outdoor heat exchanger to the air outlet, the outdoor fan comprises a fan and a motor, and a connecting part is arranged on the motor; the motor support is used for installing an outdoor fan, and the motor support is made of a round pipe; the motor support comprises a supporting part located in the middle of the motor support, and a first leveling part is arranged on the supporting part and used for abutting against the connecting part. The second leveling parts are located at the two ends of the motor support, and the second leveling parts are connected with the machine shell; and the transition part is connected between the supporting part and the second leveling part, and the distance from the transition part to the outdoor fan is gradually increased in the direction from the supporting part to the second leveling part. The air conditioner outdoor unit has the advantages of low noise and low wind resistance.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to an outdoor unit of an air conditioner. Background Art

[0002] An air conditioner is a device that appropriately controls indoor air for use purposes, and is a device for adjusting the temperature, humidity, air cleanliness, or air flow of indoor air. An air conditioner generally includes an indoor unit of an air conditioner and an outdoor unit of an air conditioner. Among them, the outdoor unit of the air conditioner includes a housing, an outdoor heat exchanger, an outdoor fan, a motor bracket, etc. The motor bracket is connected to the housing, and the motor of the outdoor fan is connected to the motor bracket.

[0003] Nowadays, air conditioning equipment on the market requires low vibration and low noise, and has high reliability in use to meet people's requirements for a quiet and comfortable environment in work and life. The motor speed of the top-outlet outdoor unit is several hundred to one thousand revolutions per minute. The motor, the motor bracket, the motor bracket and the housing, etc. are all rigidly connected. The motor speed is relatively fast, which is easy to generate structural vibration and low-frequency vibration noise. In addition, the wind-blocking area of the motor bracket should not be too large. When the fan rotates at the same speed, the air volume decreases when the wind-blocking area is large, and the heat exchange capacity of the heat exchanger decreases. Therefore, when designing the motor bracket, in addition to the conventional design points, it is also necessary to particularly focus on aspects such as low noise and low wind resistance. There is an urgent need to develop a new motor bracket to solve the vibration noise and wind resistance problems at the motor bracket during the operation of the air conditioner. Summary of the Utility Model

[0004] This application provides an outdoor unit of an air conditioner, which has the advantages of low noise and low wind resistance.

[0005] On the one hand of this application, an outdoor unit of an air conditioner includes: a housing, on which an air inlet and an air outlet are provided; an outdoor heat exchanger, which is arranged in the housing corresponding to the air inlet; an outdoor fan, which is arranged between the outdoor heat exchanger and the air outlet and is used to blow the air heated by the outdoor heat exchanger to the air outlet. The outdoor fan includes a fan and a motor, and a connecting part is arranged on the motor; and a motor bracket for installing the outdoor fan, and the motor bracket is made of a round tube; the motor bracket includes: a supporting part, which is located in the middle of the motor bracket, and a first flattened part is arranged on the supporting part for abutting against the connecting part; a second flattened part, which is located at both ends of the motor bracket, and the second flattened part is connected to the housing; a transition part, which is connected between the supporting part and the second flattened part, and in the direction from the supporting part to the second flattened part, the distance from the transition part to the outdoor fan gradually increases.

[0006] In the outdoor unit of the air conditioner of the present application, the motor bracket is processed from a round tube. The round tube reduces the air flow resistance and reduces the risk of whistling sound and vibration noise caused by the air flow. The distance between the second flattened part and the blades of the outdoor fan is increased, so that the eddy current between the blades and the motor is weakened, and the flow resistance is reduced. The transition part is used for the transition from the round tube to the flattened part, dispersing the stress of the motor bracket, and improving the vibration damping performance and stability performance of the motor bracket.

[0007] In some embodiments, the air inlet is located on the side of the casing, and the air outlet is located on the top of the casing.

[0008] In some embodiments, a concave portion is provided on the supporting portion, and the concave portion is formed by the partial lower wall of the supporting portion protruding towards the first flattened part.

[0009] In some embodiments, the concave portion includes: a third flattened part parallel to the first flattened part; an installation hole for connecting with the connecting part is provided on the first flattened part, and the installation hole penetrates through the third flattened part.

[0010] In some embodiments, one end of the transition part connecting the supporting portion is the first end, and the end connecting the second flattened part is the second end; from the first end to the second end, the internal gap of the transition part gradually becomes smaller in the distance d along the axial direction of the motor.

[0011] In some embodiments, a limiting hole is provided on one of the first flattened part and the connecting part, and a positioning post is provided on the other, and the positioning post cooperates with the limiting hole.

[0012] In some embodiments, an installation hole for connecting with the connecting part is provided on the first flattened part, and the inner diameter of the limiting hole is larger than the inner diameter of the installation hole.

[0013] In some embodiments, a support frame body is provided on the casing, and the support frame body includes a first plate portion and a second plate portion connected at an angle;

[0014] The second flattened part includes a main body part and a bent part, the main body part abuts against the first plate part, and the bent part abuts against the second plate part.

[0015] In some embodiments, the bent part is formed by bending the edge of the main body part, and the bent part is connected to the second plate part through a fastener.

[0016] In some embodiments, the first flattened part is formed by flattening a part of the upper wall of the supporting portion, and the second flattened part is formed by flattening the upper part and the lower part of the round tube towards the middle. Description of the Drawings

[0017] Figure 1 and Figure 2 shows a perspective view of an outdoor unit of an air conditioner according to some embodiments;

[0018] Figure 3 Shows a cross-sectional view of an outdoor unit of an air conditioner according to some embodiments;

[0019] Figure 4 Shows an internal structure diagram of an outdoor unit of an air conditioner according to some embodiments;

[0020] Figure 5 Shows a three-dimensional view of a support frame and a motor bracket of an outdoor unit of an air conditioner according to some embodiments;

[0021] Figure 6 Shows a three-dimensional view of a motor bracket and a motor of an outdoor unit of an air conditioner according to some embodiments;

[0022] Figure 7 Shows a three-dimensional view of a motor bracket of an outdoor unit of an air conditioner according to some embodiments;

[0023] Figure 8 Shows a cross-sectional view of a motor bracket of an outdoor unit of an air conditioner according to some embodiments;

[0024] Figure 9 Shows a side view of a motor bracket and an outdoor fan of an outdoor unit of an air conditioner according to some embodiments;

[0025] Figure 10 Shows a radial cross-sectional view of a motor bracket of an outdoor unit of an air conditioner at a dented portion according to some embodiments;

[0026] Figure 11 Shows a partial view of a motor bracket of an outdoor unit of an air conditioner at a dented portion according to some embodiments.

[0027] In the above figures, 10 is the housing; 11 is the support bottom plate; 12 is the frame column; 13 is the grille plate; 14 is the cover plate; 15 is the fan cover plate; 16 is the support frame body; 161 is the first plate portion; 162 is the second plate portion; 17 is the air inlet; 18 is the air outlet; 20 is the electrical box; 30 is the compressor; 40 is the outdoor heat exchanger; 50 is the outdoor fan; 51 is the motor; 511 is the connecting portion; 512 is the positioning column; 52 is the fan; 60 is the air guide ring; 70 is the motor bracket; 701 is the support rod; 702 is the internal gap; 71 is the support portion; 711 is the first flattened portion; 712 is the dented portion; 7121 is the third flattened portion; 7122 is the arc transition portion; 713 is the mounting hole; 714 is the limiting hole; 72 is the second flattened portion; 721 is the main body portion; 722 is the bent portion; 73 is the transition portion. Detailed implementation manners

[0028] To make the objectives and implementation manners of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application with reference to the accompanying drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part, rather than all, of the embodiments of this application.

[0029] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0030] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0031] In the description of this application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In this application, the air conditioner performs the refrigeration cycle 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.

[0033] The compressor compresses the refrigerant gas in a low-temperature and low-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 the heat is released to the surrounding environment through the condensation process.

[0034] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant 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 the low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant for heat exchange with the material to be cooled. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0035] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger. The indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0036] The indoor heat exchanger and the outdoor heat exchanger are used as condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner serves as a heater in the heating mode. When the indoor heat exchanger is used as an evaporator, the air conditioner serves as a cooler in the cooling mode.

[0037] Refer to Figures 1 to 4 According to an embodiment of the present application, an outdoor unit of an air conditioner includes a housing 10. The housing 10 is in the shape of a rectangular parallelepiped box, generally forming the appearance of the outdoor unit of the air conditioner.

[0038] The housing 10 includes a support bottom plate 11 and frame columns 12 connected to the four corners of the support bottom plate 11. The frame columns 12 play a role in supporting the entire outdoor unit of the air conditioner.

[0039] The side surface of the housing 10 is provided with a grille plate 13 connected to the frame columns 12. The grille holes on the grille plate 13 form an air inlet 17.

[0040] A plate may not be provided between the frame columns 12. In this way, the space between the frame columns 12 forms an air inlet 17.

[0041] The side surface of the housing 10 is provided with a cover plate 14 connected to the frame columns 12, which is used to connect the electrical box or cover the internal components of the housing 10.

[0042] In some embodiments, there is no cover plate 14 and grille plate 13 on the rear side surface of the housing 10; grille plates 13 are provided on the left side surface, the left part of the front side surface, and the rear part of the right side surface of the housing 10. Therefore, the rear side, left side, the left part of the front side, and the rear part of the right side of the housing 10 form an air inlet 17 for allowing outdoor air to enter the housing 10.

[0043] The right part of the front side surface and the front part of the right side surface of the housing 10 are provided with cover plates 14. The cover plate 14 on the front part of the right side surface can be integrally formed with the grille plate 13 on its rear part.

[0044] The electrical box 20 can be connected to the cover plate 14. Components related to the refrigerant such as the compressor 30 can be connected to the support bottom plate 11. The cover plate 14 can cover the electrical box 20, the compressor 30, etc., so as to play a protective role.

[0045] According to an embodiment of the present application, at the upper part of the side surface of the housing 10, there is a fan cover plate 15 connected between the frame columns 12. The top end of the fan cover plate 15 is open to form an air outlet 18 for discharging the air inside the housing 10.

[0046] At the bottom of the fan cover plate 15, there is a support frame body 16, and the support frame body 16 is connected to the frame columns 12.

[0047] The air conditioner outdoor unit includes an outdoor heat exchanger 40, and the outdoor heat exchanger 40 is arranged inside the housing 10 corresponding to the air inlet 17. The outdoor heat exchanger 40 is used to absorb heat from the air introduced into the air inlet 17 or transfer heat to the air.

[0048] In the up and down direction, the outdoor heat exchanger 40 is located between the support bottom plate 11 and the support frame body 16.

[0049] The air conditioner outdoor unit includes an outdoor fan 50. The outdoor fan 50 is arranged inside the fan cover plate 15 corresponding to the air outlet 18, and the outdoor fan 50 is used to blow out air.

[0050] Specifically referring to Figure 3 , in the figure, the arrow indicates the air flow direction. When the outdoor fan 50 works, the air can flow from the air inlet 17, through the outdoor heat exchanger 40 to the air outlet 18. The outdoor fan 50 can be an axial flow fan.

[0051] The outdoor fan 50 is specifically located between the outdoor heat exchanger 40 and the air outlet 18.

[0052] The outdoor fan 50 includes a motor 51 and a fan 52. The motor 51 serves as the power source for the rotation of the fan 52, and the fan 52 is connected to the motor 51 to rotate under the drive of the motor 51.

[0053] Combined with Figure 1 , a guide air ring 60 is sleeved on the outer periphery of the fan 52 for guiding the air flow blown out by the fan 52. The guide air ring 60 can be connected to the upper end of the support frame body 16.

[0054] Referring to Figure 4 , the air conditioner outdoor unit includes a motor bracket 70. The motor bracket 70 is connected to the support frame body 16 on the housing 10 for supporting the motor 51 of the outdoor fan 50.

[0055] Exemplarily, the motor bracket 70 extends in the front-rear direction. The front end of the motor bracket 70 is connected to the support frame body 16 at the front side of the machine shell 10 by screws, and the rear end of the motor bracket 70 is connected to the support frame body 16 at the rear side of the machine shell 10 by screws.

[0056] Referring to Figure 5 and Figure 6 , the motor 51 is connected to the middle part of the motor bracket 70. Specifically, a connecting portion 511 extending laterally outward is provided at the bottom end of the motor 51, and the connecting portion 511 is connected to the motor bracket 70 to realize the connection of the motor 51 on the motor bracket 70.

[0057] The motor bracket 70 has two support rods 701 arranged at intervals; the connecting portion 511 has two arranged front and rear. The left end of the connecting portion 511 is connected to the left support rod 701, and the right end of the connecting portion 511 is connected to the right support rod 701.

[0058] In the prior art, in addition to the motor bracket 70, a support plate for supporting the motor 51 is also required. When installing the outdoor fan 50, it is usually necessary to first install the outdoor fan 50 to the support plate through the first fastener, and then install this whole to the motor bracket 70 through the second fastener. The assembly process and the number of parts are relatively large, which affects the installation accuracy and the stability of the motor bracket 70, and also increases the production and manufacturing cost.

[0059] In this application, the motor 51 is directly connected to the motor bracket 70, omitting the support plate, which can reduce the number of parts, and also omits the assembly process of installing the support plate to the motor bracket 70 through the second fastener. The outdoor fan 50 can be installed by directly connecting the motor 51 to the motor bracket 70 through bolts, improving the installation efficiency of the outdoor fan 50, and can also improve the installation accuracy and the stability of the bracket, reducing the production and manufacturing cost of the bracket, and solving the technical problem of relatively large assembly process and number of parts in the process of installing the outdoor fan 50 to the motor bracket 70 in the prior art.

[0060] According to an embodiment of the present application, referring to Figure 7 and Figure 8 , the motor bracket 70 is made of a round tube and is generally in the shape of a bow arm. The two ends of the motor bracket 70 are located at the lower side, and the middle part of the motor bracket 70 is located at the upper side.

[0061] The motor bracket 70 is a round tube structure, and the round tube is a structural member made of a welded tube or a seamless steel tube. The materials include and are not limited to Q235 / Q345 / 45# steel / 20Cr, with a thickness of 2.5 mm and a pipe diameter of 30 mm. The round tube reduces the air flow resistance and can reduce the risk of whistling sound and vibration noise caused by the air flow.

[0062] Meanwhile, the motor bracket 70 is made of a circular tube, which reduces the windward area of the motor bracket 70. At the same wind speed, the air volume increases, and the heat exchange capacity of the outdoor heat exchanger 40 is improved.

[0063] In a specific application example, the weight of the fan 52 is about 3.3 kg, and the weight of the motor 51 is 9.5 kg. After strength checking, the maximum stress position of the motor bracket 70 is at the connection between the motor 51 and the motor bracket 70, and the maximum stress is 8.2 MPa, which is less than the yield strength of the circular tube material and meets the requirements.

[0064] Through the modal analysis of the motor bracket 70, the natural modes within 100 Hz are obtained. The natural frequency of the first-order mode is 25 Hz (up and down swing), the natural frequency of the second-order mode is 32 Hz (left and right torsion), the natural frequency of the third-order mode is 43 Hz (left and right crosstalk), and there is no natural frequency point between 44 Hz and 100 Hz. The natural frequency is far from the excitation frequencies of the fan 52 and the motor 51, and resonance is not likely to occur. Through the combination of the above theory and practice, the structure of the motor bracket 70 is continuously optimized, so that the strength, wind resistance, and vibration noise of each part of the motor bracket 70 in this application reach the optimal state.

[0065] The motor bracket 70 of the embodiment of the present application includes a support portion 71 located in the middle. On one side (upper end) of the support portion 71 facing the connection portion 511, there is a first flattened portion 711, and the upper surface of the first flattened portion 711 is a plane for connecting with the connection portion 511.

[0066] The connection portion 511 abuts against the upper surface of the first flattened portion 711, and then bolts pass through the connection portion 511 and the motor bracket 70 to connect the motor 51 and the motor bracket 70.

[0067] The motor bracket 70 includes second flattened portions 72 located at both ends. The second flattened portions 112 are plate-shaped, that is, their upper surfaces and lower surfaces are both planes. The second flattened portions 72 are used to connect with the support frame body 16.

[0068] The motor bracket 70 includes a transition portion 73 connected between the support portion 71 and the second flattened portions 72. One end of the transition portion 73 connected to the support portion 711 is the first end, and one end of the transition portion 73 connected to the second flattened portions 72 is the second end. From the first end to the second end, the distance from the transition portion 73 to the fan 52 gradually increases.

[0069] In the motor bracket 70 provided by the embodiment of the present application, the distance L from the second flattened portion 72 to the blades of the fan 52 (as Figure 9 shown) increases, which weakens the eddy current between the blades of the fan 52 and the motor 51 and reduces the flow resistance.

[0070] The transition part 73 is used for the transition between the circular tube of the support part 71 and the second flattened part 72, so that the stress of the motor bracket 70 is dispersed, and the vibration damping performance and stability performance of the motor bracket 70 are improved.

[0071] According to an embodiment of the present application, the first flattened part 711 can be formed by using a special tooling to flatten a part of the upper wall of the circular tube downward. The first flattened part 711 is mainly to increase the supporting area of the motor bracket 70 for the connecting part 511 on the motor 51. If the connecting part 511 is directly abutted against the circular tube, then the circular tube forms a line support for the connecting part 511, and the supporting area is relatively small, resulting in a problem of insufficient connection stability.

[0072] Corresponding to the position and quantity of the connecting part 511, there are two first flattened parts 711 arranged at intervals on the support part 71 of each support rod 701.

[0073] The second flattened part 72 can be formed by using a special tooling to flatten the upper and lower walls at both ends of the circular tube towards the middle.

[0074] In some embodiments, the first end of the transition part 73 is in the shape of a circular tube, the second end of the transition part 73 is in the shape of a plate, and from the first end to the second end, the vertical distance d of the internal void 702 of the transition part 73 gradually becomes smaller. Here, the vertical distance is the distance along the central axis direction of the motor.

[0075] The transition part 73 can be formed by using a special tooling to flatten the upper and lower walls of the circular tube towards the middle to different degrees.

[0076] In some embodiments, referring to Figure 8 and Figure 10 , the support part 71 includes a concave part 712. The concave part 712 corresponds to the lower part of the first flattened part 711.

[0077] Since the motor bracket 70 needs to bear the load of the heavy motor 51, the impact generated by the movement of the motor 51, the reaction force of the air flow, etc. Therefore, the motor bracket 70 needs to have sufficient strength and stiffness, and the concave part 712 of the present application thickens the wall thickness at the connection between the motor bracket 51 and the motor 51, thereby improving the stiffness and strength of the motor bracket 51 and increasing the ability of the motor bracket 70 to withstand impacts and acting forces.

[0078] The concave part 712 is formed by the partial lower wall of the support part 71 protruding upward.

[0079] In the radial cross-section of the motor bracket 70, the vertical distance d of the internal void 702 between the concave part 712 and the first flattened part 72 gradually increases from the middle to both ends.

[0080] The indentation portion 712 includes a third flattened portion 7121 located in the middle, and the third flattened portion 7121 is parallel to the first flattened portion 711.

[0081] The indentation portion 712 includes arc transition portions 7122 connected to both ends of the third flattened portion 7121. In the direction away from the third flattened portion 7121, the distance between the arc transition portion 7122 and the first flattened portion 711 gradually increases.

[0082] Coaxial mounting holes 713 are provided on the first flattened portion 711 and the third flattened portion 7121.

[0083] The bolt passes through the mounting holes 713 on the connecting portion 511, the first flattened portion 711, and the third flattened portion 7121. The nut is connected to the lower side of the third flattened portion 7121. Since the lower surface of the third flattened portion 7121 is a plane, the friction area between the nut and the motor bracket 70 can be increased, thereby increasing the connection firmness between the nut and the bolt.

[0084] In some other embodiments, the structural forms of the first flattened portion 711 and the indentation portion 712 may be the same as the structure of the second flattened portion 72, that is, the upper wall and the lower wall of the circular tube are flattened towards the middle. The flattened upper wall is the first flattened portion 711, and the flattened lower wall is the indentation portion 712. In this embodiment, the indentation portion 712 only includes the third flattened portion 7121 and does not have the arc transition portion 7122.

[0085] In some embodiments, referring to Figure 7 and Figure 11 , coaxial limiting holes 714 are provided on the first flattened portion 711 and the indentation portion 712. Correspondingly, a positioning post 512 extending downward is provided on the connecting portion 511, and the positioning post 512 is adapted to be in the limiting holes 712, so as to realize the installation and positioning of the motor 51 relative to the motor bracket 70, thereby improving the assembly efficiency of the motor 51 and the motor bracket 70.

[0086] If the inner diameters of the mounting holes 713 and the limiting holes 714 are the same, or the inner diameter of the mounting hole 713 is greater than the inner diameter of the limiting hole 714, then the positioning post 512 may be misinserted into the mounting hole 713, which brings inconvenience to the assembly. Therefore, in the embodiments of the present application, the inner diameter of the limiting hole 714 may be greater than the inner diameter of the mounting hole 713, so that the limiting hole 714 and the mounting hole 713 can be distinguished, and the positioning post 512 is prevented from being misinserted into the mounting hole 713.

[0087] In some embodiments, referring to Figure 5 and Figure 7 , a bending portion 722 is provided at the edge of the second flattened portion 72. The bending portion 722 is connected to the support frame body 16 by bolts to realize the connection between the motor bracket 70 and the machine shell 10.

[0088] The support frame body 16 includes a first plate portion 161 and a second plate portion 162 that are angularly connected. The first plate portion 161 extends horizontally, and the second plate portion 162 extends vertically.

[0089] The second flat portion 72 includes a body portion 721. The body portion 721 is connected to the transition portion 73. The bending portion 722 is formed by bending the edge of the body portion 721.

[0090] The body portion 721 abuts against the upper surface of the first plate portion 161, thereby increasing the supporting effect of the support frame body 16 on the motor bracket 70.

[0091] The bending portion 722 abuts against the second plate portion 162, and then the two are fixed by bolts.

[0092] The bolts at the connection between the motor 51 and the motor bracket 70, and the bolts at the connection between the motor bracket 70 and the support frame body 16 are all equipped with spring washers. The material of the spring washers is spring steel. After assembly, the washers are flattened, and their resilience can keep the pressure and friction between the threads, thereby achieving anti-loosening.

[0093] A blowing noise experiment is conducted on the air conditioner outdoor unit of this application, that is, the noise generated when only the outdoor fan 50 is running, and the following table of data is obtained:

[0094]

[0095]

[0096] It can be seen from the experimental results that the blowing noise of the air conditioner outdoor unit of this application meets the use requirements; the transmitted sound on the outdoor side is less than 20 dB(A), which also meets the use requirements.

[0097] In addition, in the experiment, we found that after the distance L between the end of the motor bracket 70 and the blade of the fan 52 increases, compared with before the increase (the motor bracket is in a straight rod shape), the noise of the outdoor unit decreases by 1.5 dB(A); and through the flow field analysis, it can also be obtained that by increasing the distance L between the end of the motor bracket 70 and the blade of the fan 52, the eddy current between the blade of the fan 52 and the motor 51 is weakened, the flow resistance is reduced, and the wind noise is reduced.

[0098] In the above embodiments, the top-blowing air conditioner outdoor unit is taken as an example for description. It can be understood that the motor bracket 70 in this application is also applicable to the side-blowing air conditioner outdoor unit.

[0099] As described above, in the air conditioner outdoor unit provided by this application, the motor bracket 70 is made of a round tube. The round tube part on the motor bracket 70 reduces the air flow resistance and reduces the risk of whistling sound and vibration noise caused by the air flow.

[0100] In addition, the motor bracket 70 is made of a circular tube, which reduces the windward area of the motor bracket 70. At the same wind speed, the air volume increases, and the heat exchange capacity of the outdoor heat exchanger 40 is improved.

[0101] In addition, through the structural design of each part of the motor bracket 70, the motor bracket 70 is not prone to resonance, and the strength, wind resistance, and vibration noise of each part reach the optimal state.

[0102] In addition, the distance L from the second flat part 72 to the blades of the fan 52 is increased, which weakens the eddy current between the blades of the fan 52 and the motor 51 and reduces the flow resistance.

[0103] In addition, the transition part 73 is used for the transition between the circular tube of the support part 71 and the second flat part 72, which disperses the stress of the motor bracket 70 and improves the vibration damping performance and stability performance of the motor bracket 70.

[0104] In addition, a concave part 712 is provided on the motor bracket 70, which improves the stiffness and strength of the motor bracket 51 and increases the ability of the motor bracket 70 to withstand impacts and acting forces.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0106] For the sake of convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. An air conditioner outdoor unit, characterized in that: include: A casing, the side of which is provided with an air inlet, and the top of the casing is provided with an air outlet; an outdoor heat exchanger, arranged in the casing corresponding to the air inlet; An outdoor fan is provided between the outdoor heat exchanger and the air outlet, and is used to blow the air after heat exchange through the outdoor heat exchanger toward the air outlet. The outdoor fan includes a fan and a motor, and a connecting portion is provided on the motor. as well as A motor bracket is used to install the outdoor fan, and the motor bracket is made of a round tube; the motor bracket includes: A support portion, located in the middle of the motor bracket, and provided with a first flattening portion for abutting against the connecting portion; A second flattening portion is located at two ends of the motor bracket, and the second flattening portion is connected to the housing; The transition portion is connected between the support portion and the second flattening portion, and the distance from the transition portion to the outdoor fan gradually increases in the direction from the support portion to the second flattening portion.

2. The air conditioner outdoor unit according to claim 1, characterized in that: The support portion is provided with a concave portion, and the concave portion is formed by a portion of the lower wall of the support portion protruding toward the first flattening portion.

3. The air conditioner outdoor unit according to claim 2, characterized in that: The depressed portion includes: A third flat portion, parallel to the first flat portion; The first flattening portion is provided with a mounting hole for connecting with the connecting portion, and the mounting hole passes through the third flattening portion.

4. The air conditioner outdoor unit according to claim 1, characterized in that: One end of the transition portion connected to the supporting portion is a first end, and one end connected to the second flattening portion is a second end; From the first end to the second end, the internal gap of the transition portion gradually decreases along the distance d in the axial direction of the motor.

5. The air conditioner outdoor unit according to claim 1, characterized in that: One of the first flattening portion and the connecting portion is provided with a limiting hole, and the other is provided with a positioning column, and the positioning column is matched with the limiting hole.

6. The air conditioner outdoor unit according to claim 5, characterized in that: The first flattening portion is provided with a mounting hole for connecting with the connecting portion, and the inner diameter of the limiting hole is larger than the inner diameter of the mounting hole.

7. The air conditioner outdoor unit according to claim 1, characterized in that: The housing is provided with a support frame, and the support frame includes a first plate portion and a second plate portion connected at an angle; The second flattening portion includes a main body portion and a bent portion, the main body portion abuts against the first plate portion, and the bent portion abuts against the second plate portion.

8. The air conditioner outdoor unit according to claim 7, characterized in that: The bent portion is formed by bending the edge of the main body portion, and the bent portion is connected to the second plate portion via a fastener.

9. The air conditioner outdoor unit according to claim 1, characterized in that: The first flattened portion is formed by flattening a portion of the upper wall of the support portion, and the second flattened portion is formed by flattening the upper portion and the lower portion of the circular tube toward the middle.

10. An air conditioner outdoor unit, characterized in that: include: a casing, on which an air inlet and an air outlet are provided; an outdoor heat exchanger, arranged in the casing corresponding to the air inlet; An outdoor fan is provided between the outdoor heat exchanger and the air outlet, and is used to blow the air after heat exchange through the outdoor heat exchanger toward the air outlet. The outdoor fan includes a fan and a motor, and a connecting portion is provided on the motor. as well as The motor bracket is in the shape of a bow arm and is used to install the outdoor fan. The motor bracket is made of a round tube and includes: A support portion, located in the middle of the motor bracket, and provided with a first flattening portion for abutting against the connecting portion; The second flattening part is located at two ends of the motor bracket, the second flattening part is connected to the housing, and the second flattening part is farther away from the fan than the supporting part.

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