Air conditioner outdoor unit

Abstract

The invention relates to the technical field of air conditioning, in particular to an air conditioner outdoor unit. According to the air conditioner outdoor unit, the spiral cooling flow channel is formed in the machine shell of the compressor, the flowing path of the cooling agent is prolonged, and the cooling effect can be improved. A first mounting hole is formed in one end of the spiral cooling flow channel, and a first nozzle is arranged in at least part of the first mounting hole, so that a coolant in the spiral cooling flow channel is sprayed to the first cooling cavity through the first nozzle, and the cooling effect on the motor part is improved under the action of flash evaporation and / or atomization of the coolant; due to the action of the first nozzle, pressure difference exists between the first cooling cavity and the second cooling cavity, the coolant in the first cooling cavity enters the second cooling cavity through the gap between the stator and the rotor, the coolant makes contact with the stator and the rotor on the two sides of the gap respectively for cooling, and the cooling effect is further improved. Part of the first mounting holes can be plugged so as to adapt to the cooling requirement of the motor part.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air conditioning technology, and in particular to an air conditioner outdoor unit. BACKGROUND

[0002] An air conditioner comprises an outdoor unit and an indoor unit, and the outdoor unit is connected to the indoor unit. The air conditioner performs a refrigeration and heating cycle of the air conditioner by using a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a throttling element.

[0003] The compressor is usually provided with a motor, which drives the compression of low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas to create conditions for condensation heat release. The motor generates a large amount of heat during operation, so the cooling of the motor is crucial.

[0004] In the related art, the cooling effect of the motor is poor, which affects the safety of the operation of the motor. SUMMARY

[0005] The present application provides an air conditioner outdoor unit to improve the cooling effect of the motor.

[0006] The present application provides an air conditioner outdoor unit, which comprises:

[0007] A compressor, comprising a motor part and a compression part, the motor part drives the compression part to compress refrigerant gas; the motor part comprises:

[0008] A casing having a first end and a second end opposite along an axial direction; the casing is provided with a first inlet and a first outlet;

[0009] A rotor coaxially arranged in the casing and rotating relative to the casing;

[0010] A stator fixed in the casing; the stator is sleeved on the outside of the rotor; a spiral cooling flow channel is formed between the stator and the casing, the spiral cooling flow channel extends spirally from the first end of the casing towards the second end of the casing; the first end of the spiral cooling flow channel is in communication with the first inlet, and the second end of the spiral cooling flow channel is in communication with the first outlet;

[0011] A first cooling cavity and a second cooling cavity are formed in the casing, the first cooling cavity and the second cooling cavity are respectively located on the two sides of the stator and the rotor along the axial direction; the first cooling cavity and the second cooling cavity are in communication through the gap between the stator and the rotor;

[0012] The second end of the spiral cooling flow channel is communicated with a plurality of first mounting holes which are arranged along the circumference of the casing; at least part of the plurality of first mounting holes are mounted with first nozzles which are communicated with the first mounting holes and the first cooling cavity; the first mounting holes which are not mounted with the first nozzles are selectively blocked.

[0013] In the embodiments of the present application, the shape of the spiral cooling flow channel can increase the contact area of the stator and the casing with the coolant respectively, thereby prolonging the flow path of the coolant and helping to improve the cooling effect. By mounting the first nozzles in the first mounting holes, the coolant in the spiral cooling flow channel is sprayed towards the first cooling cavity through the first nozzles, and under the action of the refrigerant flashing and / or atomization, the cooling effect on the motor part is improved; moreover, due to the action of the first nozzles, there is a pressure difference between the first cooling cavity and the second cooling cavity, and under the action of the pressure difference, the coolant in the first cooling cavity enters the second cooling cavity through the gap between the stator and the rotor, and the coolant contacts and cools the stator and the rotor on both sides of the gap respectively, further improving the cooling effect. In addition, by adjusting the number of first mounting holes mounted with the first nozzles and the number of blocked first mounting holes, the flow of the coolant can be adjusted to adapt to the motor part with different cooling requirements, thereby expanding the application flexibility of the spiral sleeve.

[0014] In some embodiments of the present application, the first nozzle is configured to form a first jet channel, and the first jet channel comprises: a first hole section, a second hole section and a third hole section communicated in sequence, the first hole section is communicated with the spiral cooling flow channel, and the third hole section is communicated with the first cooling cavity.

[0015] The diameter of the second hole section is smaller than the diameter of the first hole section and the diameter of the third hole section respectively.

[0016] In this way, along the flow direction of the coolant, the cross-sectional area of the second hole section at the smallest diameter decreases relative to the first hole section, the flow rate increases, and the pressure decreases. When the pressure of the coolant decreases below the saturation pressure, the liquid coolant evaporates instantaneously, i.e. flashing, absorbs latent heat, and the temperature drops, thereby improving the cooling effect.

[0017] In some embodiments of the present application, the first hole section and the third hole section are both tapered holes; the tapered hole has a large-diameter end and a small-diameter end opposite along the axial direction, the small-diameter end of the tapered hole is connected with the second hole section; and the second hole section is a circular hole.

[0018] In this way, along the flow direction of the coolant, the diameter of the first hole section tapers, the cross-sectional area gradually decreases, and the flow rate uniformly increases, which is beneficial to reduce the turbulent flow and vortex flow. The tapered first hole section can reduce the impact of the refrigerant on the hole wall, reduce the local pressure loss, and improve the energy conversion efficiency.

[0019] The second hole section is a circular hole, and the diameter of the second hole section is constant along the axial direction. The second hole section forms a throat portion with the smallest diameter and the lowest pressure drop, providing sufficient pressure for the flash evaporation of the coolant.

[0020] The diameter of the third hole section gradually increases along the flow direction of the coolant, and the cross section gradually increases, so that the flow velocity decreases and part of the kinetic energy is converted into static pressure. The gradually expanding third hole section can provide space for the uniform expansion of the bubbles generated by flash evaporation, which helps to reduce shock and pressure fluctuations and improve the stability of the jet.

[0021] In some embodiments of the present application, the first jet channel further comprises a fourth hole section, the fourth hole section is in communication with the third hole section, and the fourth hole section is configured to be connected with a dismounting tool.

[0022] The third hole section is in communication with the first cooling cavity through the fourth hole section. The fourth hole section is configured to be connected with a dismounting tool, facilitating the dismounting of the first nozzle.

[0023] In some embodiments of the present application, the first mounting hole is a threaded hole, and the first mounting hole is threadedly connected with the first nozzle.

[0024] The motor part further comprises a plugging member, and the plugging member is threadedly connected with the first mounting hole.

[0025] The plugging member and the first nozzle are both threadedly connected with the first mounting hole, and the connection mode is simple and reliable.

[0026] In some embodiments of the present application, the bottom side of the shell is provided with a second outlet, and the second outlet is in communication with the first cooling cavity and the second cooling cavity, respectively.

[0027] The second outlet is arranged on the bottom side of the shell, which is conducive to the complete discharge of the coolant in the first cooling cavity and the second cooling cavity, and helps to improve the cooling effect.

[0028] In some embodiments of the present application, the first outlet is configured to be in communication with an economizer through a first pipeline, and a first control valve is arranged on the first pipeline.

[0029] The second outlet is configured to be in communication with an evaporator through a second pipeline, and a second control valve is arranged on the second pipeline.

[0030] The first inlet is configured to be in communication with a condenser through a third pipeline.

[0031] The first inlet of the embodiment of the application is communicated with the condenser through the third pipeline, the first outlet is communicated with the economizer through the first pipeline, and the second outlet is communicated with the evaporator through the second pipeline, and the motor part is cooled by the refrigerant without the need of setting an additional cooling source. Moreover, the refrigerant flow and pressure in the casing are controlled by the first control valve and the second control valve, the precision control of the heat dissipation of the motor part is improved, the refrigerant is matched with the heat dissipation requirement of the motor part, the possibility of insufficient cooling and heat accumulation of the motor part is reduced, and the possibility of the formation of condensed water on the outer surface of the casing due to the overcooling of the motor part is reduced.

[0032] In some embodiments of the application, a second nozzle is further installed on the casing and communicated with the first cooling cavity.

[0033] In the embodiment of the application, the second nozzle is arranged on the casing to spray the coolant into the first cooling cavity, which not only increases the flow of the coolant in the first cooling cavity and improves the cooling effect, but also directly introduces the coolant into the first cooling cavity to further improve the cooling effect, and further increases the pressure of the coolant in the first cooling cavity to increase the pressure difference between the first cooling cavity and the second cooling cavity to provide power for the coolant to pass through the gap between the stator and the rotor to cool the stator, the rotor and the motor shaft in the middle part, and further improve the cooling effect.

[0034] In some embodiments of the application, the second nozzle is configured to form a second spray channel having a first end and a second end opposite to each other in the axial direction, the first end of the second spray channel is located on the outside of the casing, and the diameter of the first end of the second spray channel is greater than the diameter of the second end of the second spray channel.

[0035] The second nozzle is further configured to form a spray hole communicated with the second spray channel, the spray hole is located at the second end of the second spray channel, and the diameter of the spray hole is smaller than the diameter of the second end of the second spray channel.

[0036] In the flow direction of the coolant, the diameter of the second spray channel decreases to increase the flow rate of the coolant and reduce the pressure. Moreover, the diameter of the spray hole is smaller than the diameter of the second end of the second spray channel, the flow rate is further increased, and the pressure is continuously reduced, so that the coolant is flashed into a gaseous state to absorb a large amount of heat, thereby increasing the flow of the cooling gas in the motor and improving the cooling efficiency. Of course, the coolant sprayed out of the spray hole can form a mist-shaped coolant to increase the surface area, accelerate evaporation and heat absorption, and improve the cooling effect.

[0037] In some embodiments of this application, the motor portion further includes a spiral sleeve, the spiral sleeve being located inside the housing, and the outer side of the spiral sleeve and the housing forming the spiral cooling channel;

[0038] Sealing rings are provided between the two ends of the spiral sleeve and the housing.

[0039] In this embodiment, an additional spiral sleeve is provided to form a spiral cooling channel with the housing, simplifying the housing structure and facilitating manufacturing. Furthermore, by providing sealing rings at both ends of the spiral sleeve, the sealing performance of the spiral cooling channel is improved, allowing the coolant to flow through it. Attached Figure Description

[0040] Figure 1 A schematic diagram of the refrigeration system and refrigerant flow direction provided for some embodiments of this application;

[0041] Figure 2 A schematic diagram of the motor portion of a compressor provided in some embodiments of this application;

[0042] Figure 3 A front view of the motor portion of a compressor provided in some embodiments of this application;

[0043] Figure 4 for Figure 3 AA section view in the middle;

[0044] Figure 5 This is a schematic diagram of the structure of the spiral sleeve provided in some embodiments of this application;

[0045] Figure 6 A front view of a spiral sleeve provided in some embodiments of this application;

[0046] Figure 7 for Figure 6 BB section view in the middle;

[0047] Figure 8 Cross-sectional views of the motor portion provided in some embodiments of this application;

[0048] Figure 9 Cross-sectional views of the housing provided for some embodiments of this application;

[0049] Figure 10 for Figure 4 An enlarged schematic diagram of region P in the diagram;

[0050] Figure 11 Structural diagram of a first nozzle provided for some embodiments of this application;

[0051] Figure 12 for Figure 11 A sectional view of CC in the diagram;

[0052] Figure 13 is an enlarged schematic view of the Q region in Figure 4

[0053] Figure 14 is a schematic view of a second nozzle provided in some embodiments of the present application;

[0054] Figure 15 is a sectional view of the second nozzle provided in some embodiments of the present application.

[0055] BRIEF DESCRIPTION OF DRAWINGS

[0056] 10: compressor; 11: compression portion; 20: economizer; 30: condenser; 40: evaporator; 50: first throttling element; 60: second throttling element;

[0057] 100: motor portion; 110: casing; 111: first inlet; 112: first outlet; 113: first cooling cavity; 114: second cooling cavity; 115: second outlet; 116: discharge passage; 1161: first discharge hole; 1162: second discharge hole; 117: limiting ring; 118: second mounting hole; 119: recessed portion; 120: rotor; 130: stator; 140: bearing structure; 150: spiral cooling flow channel;

[0058] 200: spiral sleeve; 210: first mounting hole; 220: sleeve body; 221: limiting boss; 230: spiral rib; 240: boss portion; 241: mounting recess; 250: avoiding groove portion;

[0059] 300: first nozzle; 310: first injection passage; 311: first hole section; 312: second hole section; 313: third hole section; 314: fourth hole section;

[0060] 400: second nozzle; 410: second injection passage; 411: first hole portion; 412: second hole portion; 413: third hole portion; 420: injection hole; 430: first portion; 440: second portion; 441: sealing groove;

[0061] 510: first control valve; 520: second control valve. DETAILED DESCRIPTION

[0062] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the embodiments described next, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0063] ​The terms "first", "second", "third", and the like in the description and in the claims of the present application and above-described drawings are used for distinguishing between similar or identical objects and entities, and do not necessarily indicate a specific order or sequence, unless otherwise specified. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

[0064] The terms "comprise", "comprising", "have", "having", "include", "including", "contain", "containing", and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or a process that comprises several components or steps does not include only those components or steps that are expressly listed, but can include additional components or steps not expressly listed or inherent to such product or process.

[0065] The air conditioner comprises an outdoor unit and an indoor unit, and the outdoor unit is connected with the indoor unit. The air conditioner performs refrigeration and heating cycles of the air conditioner by using a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a throttling element. The compressor is provided with a motor, and the motor drives the low-temperature and low-pressure refrigerant gas in the compressor into high-temperature and high-pressure gas to create conditions for condensation heat release. A large amount of heat is generated during the operation of the motor, and therefore, the cooling of the motor is crucial.

[0066] Especially for high-speed motors, the continuous input of high-frequency alternating current to the stator winding of the motor will cause a large amount of heat to be generated by the stator winding of the motor during operation, and the friction between the rotating motor shaft and the surrounding medium will also generate a large amount of heat. These heat needs to be discharged in time, otherwise the motor will burn out, and therefore, the high-speed motor needs a cooling system to timely discharge the heat generated by the motor and ensure stable operation of the motor at a certain temperature.

[0067] Insufficient cooling of the high-speed motor will cause the motor to burn out, and excessive cooling will cause surface condensation and waste of cooling capacity, and therefore, a reasonable cooling method is crucial for the reliability and energy efficiency of the motor.

[0068] Therefore, the embodiment of the present application provides an air conditioner outdoor unit, which is provided with a first nozzle on the casing of the motor of the compressor, so that the pressures on the left and right sides of the casing are different, and then the coolant can flow between the stator and the rotor, thereby improving the cooling effect.

[0069] In addition, a plurality of first mounting holes are arranged at one end of the spiral cooling flow channel, the first mounting holes can be provided with the first nozzles, and part of the first mounting holes can be selectively plugged according to the cooling demand of the motor, so as to ensure that the cooling of the motor is adapted and the situations of insufficient cooling and excessive cooling are reduced.

[0070] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0071] First of all, it should be noted that the air conditioner outdoor unit of the embodiments of the present application can be the outdoor unit of a household air conditioner. The air conditioner outdoor unit can include an outdoor heat exchanger, a compressor, an expansion valve, etc., and the indoor heat exchanger is located indoors. The air conditioner outdoor unit of the embodiments of the present application can also be the outdoor unit of a central air conditioner, an industrial cooling air conditioner, etc. The air conditioner outdoor unit can also be called a water chiller, which produces cold water through compression refrigeration, and the cold water is delivered to the terminal equipment, such as a fan coil, an air handling unit, etc., through a cold water system to achieve refrigeration for the indoor.

[0072] In combination Figure 1 In some embodiments, the air conditioner outdoor unit can include a compressor 10, an economizer 20, a condenser 30, an evaporator 40, a first throttling element 50, and a second throttling element 60.

[0073] The exhaust port of the compressor 10 is communicated with the condenser 30 through a fourth pipeline, the condenser 30 is communicated with the economizer 20 through a fifth pipeline, and the first throttling element 50 is arranged on the fifth pipeline. The economizer 20 is communicated with the evaporator 40 through a sixth pipeline, and the second throttling element 60 is arranged on the sixth pipeline. The economizer 20 is also communicated with the suction port of the compressor 10 through a seventh pipeline. The evaporator 40 is communicated with the suction port of the compressor 10 through an eighth pipeline.

[0074] In Figure 1 In the figure, the solid line with an arrow represents the refrigerant circuit for refrigeration. The refrigerant pressure in the pipeline of the red line is greater than the refrigerant pressure in the pipeline of the yellow line, and the refrigerant pressure in the pipeline of the yellow line is greater than the refrigerant pressure in the pipeline of the blue line.

[0075] The compressor 10 compresses the refrigerant gas into high temperature and high pressure gas, and enters the condenser 30 through the fourth pipeline, and is condensed and liquefied into high pressure liquid in the condenser 30, and the temperature is reduced; then forms the medium pressure gas-liquid two-phase mixed refrigerant after passing through the fifth pipeline and passing through the first throttling element 50, and enters the economizer 20. The economizer 20 flash separates the refrigerant into gas-liquid two-phase, and the upper gaseous refrigerant enters the suction port of the compressor 10 through the seventh pipeline. The medium pressure supercooled liquid refrigerant passes through the sixth pipeline and forms low pressure liquid refrigerant under the action of the second throttling element 60, and the low pressure and low temperature liquid refrigerant absorbs the heat in the cold water pipeline in the evaporator 40, and evaporates to form low pressure gaseous refrigerant; then enters the suction port of the compressor 10 through the eighth pipeline. The temperature in the cold water pipeline is reduced by the evaporator 40 to form cold water, and circulates to the terminal equipment such as fan coil to realize cooling.

[0076] Exemplarily, the refrigerant can be R134A refrigerant.

[0077] Continuing to refer to Figure 1 In some embodiments of the present application, the compressor 10 includes a motor part 100 and a compression part 11, and the motor part 100 drives the compression part 11 to compress the refrigerant gas.

[0078] The compression part 11 can be a piston type, the piston reciprocates in the cylinder, and the refrigerant gas flow is controlled by the suction valve and the exhaust valve. The compression part 11 can also be a scroll type, the fixed scroll and the moving scroll are engaged to form gradually reduced air chambers to compress the gas. The compression part 11 can also be a screw type, the male and female rotors 120 are engaged to rotate to continuously compress the gas. The specific structure of the compression part 11 is not limited here.

[0079] The motor part 100 can be a high-speed permanent magnet motor. In combination with Figure 2 and Figure 3 The motor part 100 includes a housing 110, and the housing 110 has a first end and a second end opposite in the axial direction. The housing 110 is cylindrical in shape, facilitating the installation of the internal structure. In Figure 3 The housing 110 has a first end and a second end in the direction of the X axis in the orientation shown.

[0080] The housing 110 is provided with a first inlet 111 and a first outlet 112, the first inlet 111 is used for the inlet of the coolant, and the first outlet 112 is used for the outlet of the coolant. Exemplarily, the first inlet 111 and the first outlet 112 are arranged axially spaced, facilitating machining and connection of the pipeline.

[0081] Referring to Figure 3 and Figure 4The motor portion 100 further comprises a rotor 120 coaxially arranged in the casing 110 and rotatable relative to the casing 110. It can be understood that the rotor 120 is coaxially arranged with the casing 110. The rotor 120 is mounted to the casing 110 at both axial ends thereof via bearing structures 140. The bearing structures 140 can be oil-free bearings, such as magnetic bearings, air bearings, etc. The bearing structures 140 can also be bearings using lubricating oil, such as sliding bearings, thrust bearings, etc. The specific structure of the bearing structures 140 is not limited herein.

[0082] The motor portion 100 further comprises a stator 130 fixed in the casing 110, so that the rotor 120 is rotatable relative to the stator 130. The stator 130 can be sleeved on the outside of the rotor 120, and a gap is formed between the stator 130 and the rotor 120 to allow the coolant to flow. The stator 130 and the rotor 120 convert electrical energy into mechanical energy through electromagnetic interaction to drive the compression portion 11 to complete gas compression.

[0083] Continuing to refer to Figure 4 In the axial direction, a spiral cooling flow channel 150 is formed between the stator 130 and the casing 110, and the spiral cooling flow channel 150 extends spirally from the first end of the casing 110 towards the second end. The first end of the spiral cooling flow channel 150 is in communication with the first inlet 111, and the second end of the spiral cooling flow channel 150 is in communication with the first outlet 112. In this way, the coolant enters the first end of the spiral cooling flow channel 150 through the first inlet 111, flows along the spiral cooling flow channel 150 to the second end, and then flows out through the first outlet 112. In this process, the coolant carries away the heat of the stator 130, achieving heat dissipation and cooling of the motor portion 100.

[0084] Moreover, the shape of the spiral cooling flow channel 150 can increase the contact area of the stator 130 and the casing 110 with the coolant, thereby increasing the flow path of the coolant and helping to improve the cooling effect.

[0085] In some embodiments, the inner wall of the casing 110 forms a spiral groove, and the stator 130 and the casing 110 enclose the spiral cooling flow channel 150. In this way, the structure is simple and easy to implement.

[0086] In other embodiments, the motor portion 100 further comprises a spiral sleeve 200 located in the casing 110, and the outside of the spiral sleeve 200 and the casing 110 enclose the spiral cooling flow channel 150. Sealing rings are provided between the two ends of the spiral sleeve 200 and the casing 110 to ensure the sealing of the spiral cooling flow channel 150.

[0087] The spiral sleeve 200 is coaxially arranged with the casing 110, and the stator 130 is fixed in the spiral sleeve 200.

[0088] The spiral sleeve 200 can be a metal piece with good heat conduction performance, facilitating heat transfer from the stator 130 to the spiral sleeve 200. Exemplarily, the spiral sleeve 200 can be an aluminum alloy.

[0089] The sealing ring can be an O-shaped sealing ring, which is used to fix the spiral sleeve 200 inside the shell 110 by interference fit between the sealing ring and the shell 110.

[0090] In combination with Figure 5 and Figure 6 , the spiral sleeve 200 can include a sleeve body 220 and spiral fins 230, the sleeve body 220 being a cylinder with both ends open, and the spiral fins 230 being arranged in a spiral shape on the outer surface of the sleeve body 220. The spiral fins 230 and the sleeve body 220 form a spiral groove. When the spiral sleeve 200 is installed in the shell 110, the shell 110 functions to close the spiral groove, forming the spiral cooling flow channel 150.

[0091] Exemplarily, the sleeve body 220 and the spiral fins 230 are an integral piece formed by integral molding, which helps to improve the airtightness of the spiral cooling flow channel 150. For example, the spiral groove is machined on a cylinder.

[0092] In combination with Figure 4 and Figure 7 , a limiting boss 221 is arranged in the sleeve body 220, and one end of the stator 130 abuts against the limiting boss 221, which functions to limit the installation of the stator 130.

[0093] Continuing to refer to Figure 6 and Figure 7 , the two ends of the spiral sleeve 200 in the axial direction form boss portions 240, the outer diameter of the boss portions 240 can be the same as the outer diameter of the spiral fins 230, and the outer diameter of the boss portions 240 is greater than the outer diameter of the sleeve body 220. Two mounting grooves 241 are arranged on the two boss portions 240 respectively, the mounting grooves 241 are open towards the shell 110, and the mounting grooves 241 are used to install the sealing ring, so that the two ends of the spiral sleeve 200 are provided with the sealing ring relative to the shell 110.

[0094] Among them, one boss portion 240 can be provided with a plurality of mounting grooves 241, and the plurality of mounting grooves 241 are arranged in the axial direction at intervals, so that a plurality of sealing rings are formed between the boss portion 240 and the shell 110, which helps to improve the reliability of the sealing performance. Exemplarily, two mounting grooves 241 can be arranged on one boss portion 240, and a sealing ring is installed in each mounting groove 241 respectively.

[0095] Continuing to refer to Figures 5 to 7The boss portion 240 is spaced apart from the end of the helical rib 230 to form an escape groove portion 250. It can be understood that the helical rib 230 is spaced apart from the boss portion 240 at both axial ends. In combination with Figure 8 The first inlet 111 is opposite to one of the escape groove portions 250, and the first outlet 112 is opposite to the other escape groove portion 250. In this way, the coolant entering the first inlet 111 first enters the escape groove portion 250, and then enters the helical cooling flow channel 150; the coolant in the helical cooling flow channel 150 first enters the other escape groove portion 250, and then is discharged through the first outlet 112.

[0096] The embodiment of the present application sets two escape groove portions 250 to guide the entry and discharge of the coolant, so as to avoid the helical rib 230 being opposite to the first inlet 111 or the first outlet 112, which affects the flow direction of the coolant.

[0097] Referring to Figure 8 and Figure 9 A limiting ring 117 is formed in the casing 110, and the limiting ring 117 can be located on the side of the first outlet 112 away from the first inlet 111. One end of the helical sleeve 200 abuts against the limiting ring 117 to position the helical sleeve 200 in the casing 110. At this time, the helical sleeve 200 is assembled into the casing 110 from the side of the first inlet 111. Of course, the limiting ring 117 can also be located on the side of the first inlet 111 away from the first outlet 112, and the helical sleeve 200 is assembled into the casing 110 from the side of the first outlet 112.

[0098] In the embodiment of the present application, the helical sleeve 200 is additionally provided to form the helical cooling flow channel 150 with the casing 110, so that the casing 110 has a simple structure and is easy to process. In addition, the sealing rings are arranged at both ends of the helical sleeve 200 to improve the sealing performance of the helical cooling flow channel 150, so that the coolant flows through the helical cooling flow channel 150.

[0099] Continuing to refer to Figure 4 The first cooling cavity 113 and the second cooling cavity 114 are formed in the casing 110, and the first cooling cavity 113 and the second cooling cavity 114 are respectively located on the two sides of the stator 130 and the rotor 120 along the axial direction. The first cooling cavity 113 and the second cooling cavity 114 are communicated through the gap between the stator 130 and the rotor 120. The first cooling cavity 113 and the second cooling cavity 114 can also be configured with the coolant to cool the stator 130, the rotor 120 and the motor shaft. Moreover, the coolant can flow through the gap between the stator 130 and the rotor 120, so as to further improve the cooling effect of the stator 130 and the rotor 120.

[0100] In combination with Figure 2The bottom side of the casing 110 is provided with a second outlet 115, which is in communication with the first cooling cavity 113 and the second cooling cavity 114 respectively, so as to discharge the coolant in the first cooling cavity 113 and the second cooling cavity 114. Moreover, the second outlet 115 is arranged on the bottom side of the casing 110, which is conducive to completely discharging the coolant in the first cooling cavity 113 and the second cooling cavity 114, and helps to improve the cooling effect.

[0101] In combination Figure 9 The bottom side of the casing 110 is configured to form a discharge channel 116, which extends along the axial direction of the casing 110. The discharge channel 116 is formed in the wall of the casing 110 and is not directly communicated with the internal space of the casing 110. In this way, the arrangement of the discharge channel 116 does not affect the arrangement of the spiral cooling flow channel 150.

[0102] The casing 110 is further configured to form a first discharge hole 1161 and a second discharge hole 1162, which are respectively located at the two axial ends of the discharge channel 116. The first discharge hole 1161 is in communication with the first cooling cavity 113 and the discharge channel 116, and the second discharge hole 1162 is in communication with the second cooling cavity 114 and the discharge channel 116. The second outlet 115 is formed on the bottom wall of the discharge channel 116. The first discharge hole 1161 can be located on the side of the limiting ring 117 away from the second discharge hole 1162.

[0103] Therefore, the coolant in the first cooling cavity 113 enters the discharge channel 116 through the first discharge hole 1161, and the coolant in the second cooling cavity 114 enters the discharge channel 116 through the second discharge hole 1162. The coolant in the discharge channel 116 is discharged through the second outlet 115.

[0104] Continuing to refer to Figure 1 In some embodiments, the refrigerant of the outdoor unit serves as the coolant to cool the motor part 100. The first outlet 112 is configured to be in communication with the economizer 20 through a first pipeline, and a first control valve 510 is arranged on the first pipeline.

[0105] The second outlet 115 is configured to be in communication with the evaporator 40 through a second pipeline, and a second control valve 520 is arranged on the second pipeline.

[0106] The first inlet 111 is configured to be in communication with the condenser 30 through a third pipeline.

[0107] In this way, the first pipeline, the second pipeline and the third pipeline, as well as the structure connected by the three pipelines, form a cooling circuit of the motor part 100.

[0108] In Figure 1In the figure, the dashed line with arrow indicates the refrigerant circuit for cooling the motor part 100. In the figure, the refrigerant pressure in the pipe with red line is greater than the refrigerant pressure in the pipe with yellow line, and the refrigerant pressure in the pipe with yellow line is greater than the refrigerant pressure in the pipe with blue line.

[0109] The high-pressure and low-temperature liquid refrigerant in the condenser 30 enters the first inlet 111 through the third pipe and enters the spiral cooling flow channel 150; the refrigerant cools the motor part 100 in the spiral cooling flow channel 150. The refrigerant flows to the second end of the spiral cooling flow channel 150 and flows out through the first outlet 112. The refrigerant flowing out of the first outlet 112 can be liquid or gas-liquid two-phase mixture. The refrigerant of the first outlet 112 flows back to the economizer 20 through the first pipe.

[0110] The refrigerant flowing out of the second outlet 115 can be liquid or gas-liquid two-phase mixture. The refrigerant of the second outlet 115 enters the evaporator 40 through the second pipe.

[0111] The first control valve 510 is configured to determine the opening according to the temperature of the casing 110, so as to control the flow of the refrigerant in the motor part 100. When the temperature of the casing 110 is high, it means that the cooling effect is insufficient, and the opening of the first control valve 510 is configured to be reduced; when the temperature of the casing 110 is too low, it means that the cooling is excessive, and the opening of the first control valve 510 is configured to be increased.

[0112] In addition to controlling the flow of the refrigerant in the casing 110, the second control valve 520 is also used to control the pressure in the casing 110. When the refrigerant pressure in the casing 110 is too large, the opening of the second control valve 520 is configured to be increased; when the refrigerant pressure in the casing 110 is too small, the opening of the second control valve 520 is configured to be reduced.

[0113] The outdoor unit of the air conditioner of the embodiment of the application can further comprise a control device, which is not only electrically connected with the compressor 10 to control the working state of the compressor 10, but also electrically connected with the first control valve 510 and the second control valve 520 to control the opening of the first control valve 510 and the second control valve 520.

[0114] Thus, the first inlet 111 of the embodiment of the present application is communicated with the condenser 30 through the third pipeline, the first outlet 112 is communicated with the economizer 20 through the first pipeline, and the second outlet 115 is communicated with the evaporator 40 through the second pipeline, so that the motor part 100 is cooled by the refrigerant without the need of setting an additional cooling source. Moreover, the first control valve 510 and the second control valve 520 are used to control the flow and pressure of the refrigerant in the casing 110, so as to improve the accuracy of the heat dissipation control of the motor part 100, and make the refrigerant match the heat dissipation requirement of the motor part 100, which can not only reduce the possibility of insufficient cooling and heat accumulation of the motor part 100, but also reduce the possibility of overcooling of the motor part 100 and formation of condensed water on the outer surface of the casing 110 due to excessive cooling.

[0115] In some embodiments of the present application, the at least one of the first cooling cavity 113 and the second cooling cavity 114 can be communicated with the coolant through the pipeline, so that the first cooling cavity 113 and the second cooling cavity 114 have the coolant. In the embodiment of the present application, the first nozzle 300 is used to communicate part of the coolant in the spiral cooling flow channel 150 to the first cooling cavity 113.

[0116] In combination Figure 4 and Figure 5 , in some embodiments of the present application, the second end of the spiral cooling flow channel 150 is communicated with a plurality of first mounting holes 210, that is, the end of the spiral cooling flow channel 150 close to the first outlet 112 is provided with a plurality of first mounting holes 210.

[0117] In the embodiment of the present application, the first mounting hole 210 is arranged on one of the boss portions 240 of the spiral sleeve 200, and the first mounting hole 210 penetrates the boss portion 240 in the axial direction. In this way, in combination Figure 4 and Figure 10 , the first mounting hole 210 communicates the first cooling cavity 113 and the avoiding groove portion 250, so as to communicate the first cooling cavity 113 and the spiral cooling flow channel 150.

[0118] The plurality of first mounting holes 210 are arranged at intervals in the circumferential direction of the casing 110. In Figure 5 , the plurality of first mounting holes 210 are arranged at intervals in the circumferential direction of the spiral sleeve 200. Exemplarily, the plurality of first mounting holes 210 are uniformly arranged at intervals in the circumferential direction of the casing 110, so as to improve the uniformity of the coolant injection in the circumferential direction, and further improve the uniformity of the cooling.

[0119] The number, diameter and interval between the centers of adjacent two first mounting holes 210 of the first mounting hole 210 are not limited in the embodiment of the present application, and a person skilled in the art can set them according to the size of the spiral sleeve 200 and the required cooling requirement. Exemplarily, the first mounting hole 210 can be provided with thirty-two.

[0120] In combination Figure 8 In some embodiments, at least some of the first installation holes 210 are installed with first nozzles 300, the first nozzles 300 are in communication with the first installation holes 210 and the first cooling cavity 113, since the first installation holes 210 are in communication with the spiral cooling flow channel 150, the first nozzles 300 are in communication with the spiral cooling flow channel 150 and the first cooling cavity 113, and the first nozzles 300 spray the coolant in the spiral cooling flow channel 150 into the first cooling cavity 113.

[0121] In this way, the coolant entering the spiral cooling flow channel 150 through the first inlet 111, part of which flows out through the first outlet 112, and part of which is sprayed into the first cooling cavity 113 through the first nozzles 300.

[0122] In some embodiments, the first nozzles 300 are configured to spray the coolant to flash into a gaseous state, in which a large amount of heat is absorbed, thereby improving the cooling effect. Flashing is a phase change from liquid coolant to gaseous refrigerant, which absorbs a large amount of heat from the motor part 100 and plays a role in cooling.

[0123] In other embodiments, the first nozzles 300 are configured to spray the coolant to form a mist of coolant, which is beneficial to increase the surface area and thereby accelerate evaporation and heat absorption, so as to improve the cooling effect. Atomization is to become tiny droplets, which helps to expand the surface area and enhance heat exchange with air, and helps to cool and cool the motor part 100.

[0124] Of course, both of the above two cases can exist at the same time when the first nozzles 300 spray the coolant, that is, both gasification and atomization exist at the same time.

[0125] The first installation holes 210 without the first nozzles 300 can be optionally blocked. It can be understood that, in some implementations, all of the first installation holes 210 are installed with the first nozzles 300. In other implementations, some of the first installation holes 210 are installed with the first nozzles 300, and some of the first installation holes 210 are not installed with the first nozzles 300. The first installation holes 210 without the first nozzles 300 can be in a communication state, so that the coolant in the spiral cooling flow channel 150 enters the first cooling cavity 113 through the first installation holes 210. The first installation holes 210 without the first nozzles 300 can be blocked, blocking the spiral cooling flow channel 150 and the first cooling cavity 113.

[0126] In some embodiments of the present application, the first installation holes 210 are threaded holes, and the first nozzles 300 are screwed with the first installation holes 210, which is a reliable and simple installation method.

[0127] The motor part 100 also includes a sealing component. The first mounting hole 210 is threadedly connected to the sealing component, thereby sealing the first mounting hole 210 and achieving a simple structure. The sealing component can be a bolt, which helps to reduce costs.

[0128] In this embodiment, a first nozzle 300 is installed in the first mounting hole 210, allowing the coolant in the spiral cooling channel 150 to be sprayed into the first cooling chamber 113 through the first nozzle 300. The flash evaporation and / or atomization of the refrigerant improves the cooling effect on the motor section 100. Furthermore, due to the action of the first nozzle 300, a pressure difference exists between the first cooling chamber 113 and the second cooling chamber 114. Under this pressure difference, the coolant in the first cooling chamber 113 enters the second cooling chamber 114 through the gap between the stator 130 and the rotor 120. The coolant contacts the stator 130 and the rotor 120 on both sides of the gap for cooling, further improving the cooling effect. In addition, by adjusting the number of first mounting holes 210 for installing the first nozzle 300 and the number of first mounting holes 210 blocked, the flow rate of the coolant can be adjusted to adapt to different cooling requirements of the motor section 100, expanding the application flexibility of the spiral sleeve 200.

[0129] Combination Figure 11 and Figure 12 In some embodiments of this application, the first nozzle 300 is configured to form a first injection channel 310, which includes a first orifice 311, a second orifice 312, and a third orifice 313 connected in sequence. The first orifice 311 is connected to the spiral cooling channel 150, and the third orifice 313 is connected to the first cooling chamber 113. Thus, the coolant in the spiral cooling channel 150 enters the second orifice 312 through the first orifice 311 and is sprayed into the first cooling chamber 113 through the third orifice 313.

[0130] The diameter of the second hole section 312 is smaller than the diameter of the first hole section 311 and the diameter of the third hole section 313, respectively.

[0131] Thus, along the direction of coolant flow, that is, along Figure 12 In the positive direction of the O-axis, the cross-sectional area of ​​the coolant in the second orifice section 312, at its minimum diameter, is smaller than that of the first orifice section 311, resulting in increased flow velocity and decreased pressure. When the coolant pressure drops below the saturation pressure, the liquid coolant evaporates instantaneously, i.e., flash evaporation, absorbing latent heat, causing the temperature to drop, and improving the cooling effect.

[0132] In some embodiments, the first hole segment 311 and the third hole segment 313 are both tapered holes; the tapered holes have a large-diameter end and a small-diameter end that are opposite each other along the axial direction, and the small-diameter end of the tapered hole is connected to the second hole segment 312.

[0133] Thus, along the flow direction of the coolant, the diameter of the first hole section 311 is tapered, the cross section is gradually reduced, and the flow rate is uniformly increased, which is beneficial to reduce turbulence and vortex. The tapered first hole section 311 can reduce the impact of the coolant on the hole wall, reduce the local pressure loss, and improve the energy conversion efficiency.

[0134] The second hole section 312 is a circular hole. For example, the diameter of the second hole section 312 can be 1 mm. It can be understood that, along the axial direction, the diameter of the second hole section 312 is constant. The second hole section 312 forms a throat portion, the diameter of which is the smallest, and the pressure is reduced to the lowest, thereby providing sufficient pressure for the flashing of the coolant.

[0135] Along the flow direction of the coolant, the diameter of the third hole section 313 is gradually expanded, the cross section is gradually increased, and the flow rate is reduced, and part of the kinetic energy is converted into static pressure. The gradually expanded third hole section 313 can provide space for the uniform expansion of the bubbles generated by flashing, which is beneficial to reduce the shock and pressure fluctuation, and is beneficial to improve the stability of the injection.

[0136] In some embodiments of the present application, continuing to refer to Figure 12 The first injection channel 310 further includes a fourth hole section 314, the fourth hole section 314 being in communication with the third hole section 313, so that the third hole section 313 is in communication with the first cooling cavity 113 through the fourth hole section 314. The fourth hole section 314 is configured to be connected with a dismounting tool.

[0137] For example, the fourth hole section 314 is a hexagonal hole, and a commonly used hexagonal wrench can be used to realize the installation and dismounting of the first nozzle 300, which is simple and convenient to operate.

[0138] In the embodiments of the present application, the first nozzle 300 is located in the first mounting hole 210 and does not protrude out of the first mounting hole 210. This not only can improve the structural compactness, but also can avoid affecting the gas flow resistance in the first cooling cavity 113 due to the protrusion of the first nozzle 300 out of the first mounting hole 210, and can also avoid affecting the installation of the spiral sleeve 200 due to the protrusion of the first nozzle 300.

[0139] Referring to Figure 4 and Figure 13 In some embodiments of the present application, a second nozzle 400 is further installed on the casing 110, and the second nozzle 400 is in communication with the first cooling cavity 113.

[0140] The second nozzle 400 is installed in the second mounting hole 118. For example, the second nozzle 400 is in interference connection with the second mounting hole 118; for another example, the second nozzle 400 is in threaded connection with the second mounting hole 118.

[0141] In combination with Figure 14 and Figure 15The second nozzle 400 comprises a first part 430 and a second part 440 connected together, the outer diameter of the first part 430 is larger than that of the second part 440, and the second part 440 is provided with a sealing groove 441 at one end close to the first part 430, and a sealing gasket can be arranged in the sealing groove 441.

[0142] The second part 440 is in interference fit with the second mounting hole 118, and the sealing gasket is located between the hole wall of the second mounting hole 118 and the second part 440, so that the second nozzle 400 is in sealed connection with the second mounting hole 118, which can not only ensure the stability of the connection, but also ensure the sealing property of the connection.

[0143] The first part 430 is formed with an outer hexagonal structure at one end away from the second part 440, which facilitates the disassembly and assembly of the second nozzle 400 by using a tool.

[0144] The shell 110 can further be provided with a groove portion 119, and the opening of the groove portion 119 faces the outer side of the shell 110. The second mounting hole 118 is arranged in the groove portion 119. The second part 440 of the second nozzle 400 abuts against the bottom wall of the groove portion 119, which limits the position of the second nozzle 400 inserted into the shell 110.

[0145] In some implementations, the second part 440 can further comprise a plurality of cylindrical segments, and the outer diameter of each cylindrical segment decreases in the direction from the first part 430 to the second part 440 in the axial direction, so that the second part 440 is in a stepped shape.

[0146] Part of the second nozzle 400 is exposed to the outer side of the shell 110, which facilitates the communication with the pipeline. Part of the second nozzle 400 extends into the first cooling cavity 113, which helps to spray the coolant into the first cooling cavity 113.

[0147] In some embodiments, a plurality of second nozzles 400 are arranged, and the plurality of second nozzles 400 are arranged at intervals along the circumference of the shell 110 to increase the flow of the coolant sprayed into the first cooling cavity 113. For example, four second nozzles 400 are arranged at intervals along the circumference.

[0148] In some embodiments of the present application, the second nozzle 400 is in communication with the condenser 30 through the ninth pipeline, so that the high-pressure liquid refrigerant in the condenser 30 is sprayed into the first cooling cavity 113 through the second nozzle 400. In this way, the refrigerant in the condenser 30 is directly sprayed into the first cooling cavity 113 through the second nozzle 400, which does not pass through the heat dissipation relative to the first nozzle 300, which helps to directly reduce the temperature in the first cooling cavity 113, thereby helping to improve the cooling effect.

[0149] In the embodiment of the present application, the second nozzle 400 is arranged on the casing 110 to spray the coolant towards the first cooling cavity 113, which not only increases the flow of the coolant in the first cooling cavity 113 and improves the cooling effect, but also directly introduces the coolant into the first cooling cavity 113 to further improve the cooling effect, and further increases the pressure of the coolant in the first cooling cavity 113 to increase the pressure difference between the first cooling cavity 113 and the second cooling cavity 114, thereby providing power for the coolant to pass through the gap between the stator 130 and the rotor 120, and cooling the stator 130, the rotor 120 and the motor shaft in the middle part, and further improving the cooling effect.

[0150] With reference to Figure 14 and Figure 15 , the second nozzle 400 is configured to form a second spray channel 410, and the second spray channel 410 penetrates the first part 430 and the second part 440. The second spray channel 410 has a first end and a second end opposite to each other in the axial direction, the first end of the second spray channel 410 is located on the outside of the casing 110, the second end of the second spray channel 410 is located on the inside of the casing 110, and the diameter of the first end of the second spray channel 410 is greater than the diameter of the second end.

[0151] The second nozzle 400 is further configured to form a spray hole 420 in communication with the second spray channel 410, and the spray hole 420 is located at the second end of the second spray channel 410, and the diameter of the spray hole 420 is smaller than the diameter of the second end of the second spray channel 410.

[0152] The axial direction of the spray hole 420 can extend along the radial direction of the second spray channel 410, so that the axial direction of the spray hole 420 is perpendicular to the axial direction of the second spray channel 410. The diameter of the spray hole 420 can be 1 mm.

[0153] The spray hole 420 can be provided with a plurality of spray holes 420, and the plurality of spray holes 420 are arranged at intervals along the circumferential direction of the second nozzle 400. For example, eight spray holes 420 are uniformly arranged along the circumferential direction of the second nozzle 400.

[0154] In the flow direction of the coolant, the diameter of the second spray channel 410 decreases, which can increase the flow rate of the coolant and reduce the pressure. Moreover, the diameter of the spray hole 420 is smaller than the diameter of the second end of the second spray channel 410, which further increases the flow rate and continues to reduce the pressure, so that the coolant is flashed into a gaseous state to absorb a large amount of heat, thereby increasing the flow of the cooling gas inside the motor and improving the cooling efficiency. Of course, the coolant sprayed out through the spray hole 420 can form a mist of coolant, increase the surface area, accelerate evaporation and heat absorption, and be beneficial to improve the cooling effect.

[0155] In some embodiments, the second injection channel 410 can include a first hole portion 411, a second hole portion 412 and a third hole portion 413 connected in sequence, the diameter of the first hole portion 411 is larger than that of the second hole portion 412, the diameter of the second hole portion 412 is larger than that of the third hole portion 413, and the injection hole 420 is arranged at one end of the third hole portion 413 away from the second hole portion 412. In this way, the second injection channel 410 forms a stepped structure, and the hole portions with gradually decreasing diameters are used, so that the flow rate of the coolant gradually increases and the pressure gradually decreases when passing through the second injection channel 410, which provides the possibility of forming gaseous coolant by flashing.

[0156] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0157] For the convenience of explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be derived according to the above teachings. The selection and description of the above embodiments are to better explain 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 by comprising: The utility model relates to a compressor, comprising: a motor part and a compression part, the motor part drives the compression part to compress refrigerant gas; the motor part comprises: A casing has a first end and a second end opposite along an axial direction; the casing is provided with a first inlet and a first outlet; A rotor is coaxially arranged in the casing and rotates relative to the casing; A stator is fixed in the casing; the stator is sleeved on the outside of the rotor; a spiral cooling flow channel is formed between the stator and the casing, the spiral cooling flow channel spirally extends from the first end of the casing towards the second end of the casing; the first end of the spiral cooling flow channel communicates with the first inlet, and the second end of the spiral cooling flow channel communicates with the first outlet; A first cooling cavity and a second cooling cavity are formed in the casing, and the first cooling cavity and the second cooling cavity are respectively located on the two sides of the stator and the rotor along the axial direction; the first cooling cavity and the second cooling cavity communicate through the gap between the stator and the rotor; The second end of the spiral cooling flow channel is communicated with a plurality of first mounting holes, and the plurality of first mounting holes are arranged at intervals along the circumferential direction of the casing; at least part of the plurality of first mounting holes is mounted with a first nozzle, the first nozzle communicates the first mounting hole and the first cooling cavity; the first mounting hole without the first nozzle is selectively blocked. The first nozzle is configured to form a first injection channel, and the first injection channel comprises: a first hole section, a second hole section and a third hole section communicated in sequence, the first hole section communicates with the spiral cooling flow channel, and the third hole section communicates with the first cooling cavity; 2. The air conditioner outdoor unit according to claim 1, characterized by The diameter of the second hole section is smaller than the diameters of the first hole section and the third hole section respectively. The first hole section and the third hole section are both tapered holes; the tapered hole has a large-diameter end and a small-diameter end opposite along the axial direction, the small-diameter end of the tapered hole is connected with the second hole section; and the second hole section is a circular hole.

3. The air conditioner outdoor unit according to claim 2, characterized by The first injection channel further comprises a fourth hole section, the fourth hole section communicates with the third hole section, and the fourth hole section is configured to be connected with a dismounting tool.

4. The air conditioner outdoor unit according to claim 2, characterized by The first mounting hole is a threaded hole, and the first mounting hole is threadedly connected with the first nozzle; 5. The air conditioner outdoor unit according to claim 1, characterized by The motor part further comprises a blocking piece, and the blocking piece is threadedly connected with the first mounting hole. The bottom side of the casing is provided with a second outlet, and the second outlet respectively communicates with the first cooling cavity and the second cooling cavity.

6. The air conditioner outdoor unit according to any one of claims 1 to 5, characterized by The first outlet is configured to communicate with an economizer through a first pipeline, and the first pipeline is provided with a first control valve; 7. The air conditioner outdoor unit according to claim 6, characterized by The second outlet is configured to communicate with an evaporator through a second pipeline, and the second pipeline is provided with a second control valve; The first inlet is configured to communicate with a condenser through a third pipeline. The casing is further provided with a second nozzle, and the second nozzle communicates with the first cooling cavity.

8. The air conditioner outdoor unit according to any one of claims 1 to 5, characterized by ​ 9. The air conditioner outdoor unit according to claim 8, characterized by The second nozzle is configured to form a second jet channel having a first end and a second end axially opposite to each other, the first end of the second jet channel is located outside the casing, and the diameter of the first end of the second jet channel is greater than the diameter of the second end of the second jet channel; The second nozzle is further configured to form a jet hole in communication with the second jet channel, the jet hole is located at the second end of the second jet channel, and the diameter of the jet hole is smaller than the diameter of the second end of the second jet channel.

10. The air conditioner outdoor unit according to any one of claims 1 to 5, characterized by The motor part further comprises a spiral sleeve, the spiral sleeve is located inside the casing, and the outer side of the spiral sleeve and the casing form the spiral cooling flow channel; Sealing rings are arranged between the two ends of the spiral sleeve and the casing.

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