Air conditioner

Abstract

An air conditioner (1000). The air conditioner (1000) comprises an indoor unit (20) and an outdoor unit (10). The outdoor unit (20) comprises a compressor (11), a first pipe (181), a second pipe (182), a third pipe (183), an electromagnetic valve (191), and at least one of a buffer tank (100) or a throttling assembly (200). The first pipe (181) is communicated with the discharge side of the compressor (11), the second pipe (182) is communicated with the suction side of the compressor (11), the third pipe (183) is separately communicated with the first pipe (181) and the second pipe (182), the electromagnetic valve (191) is configured to disconnect or communicate the third pipe (183), and at least one of the buffer tank (100) or the throttling assembly (200) is configured to buffer a refrigerant flowing from the first pipe (181) to the second pipe (182) via the third pipe (183).

Description

air conditioner

[0001] This application claims priority to Chinese patent application No. 202420587533.3 filed on March 25, 2024; and priority to Chinese patent application No. 202420586112.9 filed on March 25, 2024, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of air conditioning, and in particular to an air conditioner. Background Art

[0003] The air conditioner discharges the cooled air obtained through the refrigeration cycle into the indoor space. The refrigeration cycle consists of the processes of compression, condensation, expansion and evaporation of the refrigerant, or the air conditioner discharges the heated air obtained through the heating cycle into the indoor space, thereby adjusting the temperature of the indoor air.

[0004] Summary of the Invention

[0005] An air conditioner is provided. The air conditioner includes an indoor unit and an outdoor unit. The outdoor unit is connected to the indoor unit. The outdoor unit includes a compressor, a first pipeline, a second pipeline, a third pipeline, a solenoid valve, and at least one of a buffer tank or a throttling assembly. The first pipeline is connected to the discharge side of the compressor. The second pipeline is connected to the suction side of the compressor. The third pipeline is connected to the first pipeline and the second pipeline respectively. The solenoid valve is provided in the third pipeline and is configured to disconnect or connect the third pipeline. At least one of the buffer tank or the throttling assembly is configured to buffer the refrigerant flowing from the first pipeline to the first pipeline via the third pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG1 is a block diagram of an air conditioner according to some embodiments;

[0007] FIG2 is a partial structural diagram of an outdoor unit according to some embodiments;

[0008] FIG3 is a perspective view of a buffer tank according to some embodiments;

[0009] FIG4 is a cross-sectional view of a buffer tank according to some embodiments;

[0010] FIG5 is a perspective view of an inflow portion according to some embodiments;

[0011] FIG6 is a view of the inflow portion from another perspective according to some embodiments;

[0012] FIG7 is another partial structural diagram of an outdoor unit according to some embodiments;

[0013] FIG8 is a structural diagram of a second pipeline, an eighth pipeline, and a throttling assembly according to some embodiments;

[0014] FIG9 is a structural diagram of a throttling unit according to some embodiments;

[0015] FIG10 is another structural diagram of a throttling portion according to some embodiments;

[0016] FIG. 11 is an exploded view of a restriction according to some embodiments. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. However, the embodiments described are only some of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0018] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0019] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0020] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0021] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0022] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0023] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0024] Typically, an air conditioner has a first pipeline connected to the compressor discharge side and a second pipeline connected to the compressor suction side. The refrigerant pressure in the first pipeline is higher than that in the second pipeline. A third pipeline is installed between the first and second pipelines. This third pipeline can unload when the high pressure is too high and bypass when the low pressure is too low, reducing the pressure difference between the suction and discharge sides of the compressor to protect the compressor. However, when the third pipeline is open, the high-pressure airflow passing through the third pipeline will produce a strong bypass noise.

[0025] In related art, bypass noise is reduced by installing multiple silencers on the third pipeline. For example, a silencer is installed on either side of a switch (e.g., a solenoid valve) that controls the conduction and disconnection of the third pipeline. The two silencers are respectively a first silencer and a second silencer. The first silencer is installed on the side of the switch close to the first pipeline and can filter out medium- and high-frequency noise; the second silencer is installed on the side of the switch close to the second pipeline and can filter out low-frequency noise.

[0026] However, the bypass noise peaks typically downstream of the third pipe (on the side of the switch near the second pipe), while the bypass noise is weak upstream of the third pipe (on the side of the switch near the first pipe). In other words, when high-pressure air flows through the third pipe, strong bypass noise typically occurs downstream of the third pipe. Therefore, the first muffler, located on the side of the switch near the first pipe, has little effect on reducing bypass noise. Furthermore, the second muffler, using a common structure, also has limited effect on reducing bypass noise.

[0027] To address the aforementioned issues, some embodiments of the present disclosure provide an air conditioner 1000. The outdoor unit 10 of the air conditioner 1000 includes at least one of a buffer tank 100 and a throttle assembly 200. The buffer tank 100 or the throttle assembly 200 is configured to buffer the refrigerant flowing from the first pipeline 181 through the third pipeline 183 to the second pipeline 182, thereby reducing bypass noise. This bypass noise includes low-frequency, medium-frequency, and high-frequency noise.

[0028] The end of the buffer tank 100 away from the first pipeline 181 is closed. In this way, after the refrigerant flows into the buffer tank 100, the refrigerant will impact the end of the buffer tank 100 away from the first pipeline 181, thereby greatly reducing the flow rate of the refrigerant and improving the effect of reducing bypass noise.

[0029] The throttling assembly 200 includes at least one throttling part 210. When the refrigerant passes through the input end of the throttling part 210, it is bypassed and diverted, which can reduce the flow rate of the refrigerant. When the refrigerants pass through the output end of the throttling part 210, they collide with each other, which can reduce the flow rate of the refrigerant again. In this way, by reducing the flow rate of the refrigerant multiple times, the effect of reducing the bypass noise is improved.

[0030] As shown in Fig. 1 , the air conditioner 1000 includes an indoor unit 20. The indoor unit 20 is installed indoors and is configured to perform heat exchange with indoor air.

[0031] As shown in Figure 1, the indoor unit 20 includes a first heat exchanger 21 (indoor heat exchanger). The first heat exchanger 21 is configured to exchange heat between the indoor air and the refrigerant transmitted in the first heat exchanger 21. For example, the first heat exchanger 21 operates as an evaporator in the first mode (cooling mode) of the air conditioner 1000, so that the refrigerant absorbs heat from the indoor air through the first heat exchanger 21 and evaporates; the first heat exchanger 21 operates as a condenser in the second mode (heating mode) of the air conditioner 1000, so that the refrigerant condenses by dissipating heat to the indoor air through the first heat exchanger 21. A first coil is provided in the first heat exchanger 21, and the first coil is connected to the refrigerant circuit. The refrigerant flows in the first coil of the first heat exchanger 21 to exchange heat with the indoor air.

[0032] As shown in Figure 1 , the indoor unit 20 also includes a first expansion valve 22 (indoor expansion valve). The first expansion valve 22 is connected to the first heat exchanger 21. The opening of the first expansion valve 22 regulates the pressure of the refrigerant flowing out of the first heat exchanger 21, thereby regulating the refrigerant flow rate flowing out of the first heat exchanger 21.

[0033] As shown in Fig. 1 , the air conditioner 1000 further includes an outdoor unit 10. The outdoor unit 10 is installed outdoors and is configured to perform heat exchange with outdoor air.

[0034] As shown in Figure 1, the outdoor unit 10 includes a compressor 11. Compressor 11 is configured to compress refrigerant, converting low-pressure refrigerant into high-pressure refrigerant. For example, compressor 11 includes a motor, and the rotation of the motor compresses the low-pressure gaseous refrigerant into high-pressure gaseous refrigerant. In other words, compressor 11 draws in low-pressure refrigerant and discharges high-pressure refrigerant.

[0035] As shown in Fig. 1 , the outdoor unit 10 further includes an oil separator 12. The oil separator 12 is connected to the discharge side (outlet) of the compressor 11. The oil separator 12 is configured to separate the refrigerant discharged from the compressor 11 from the lubricating oil.

[0036] As shown in Figure 1, the outdoor unit 10 also includes a second heat exchanger 14 (outdoor heat exchanger). The second heat exchanger 14 is configured to perform heat exchange between outdoor air and the refrigerant transmitted in the second heat exchanger 14. For example, the second heat exchanger 14 operates as a condenser in the first mode of the air conditioner 1000, so that the refrigerant compressed by the compressor 11 dissipates heat to the outdoor air through the second heat exchanger 14 and condenses; the second heat exchanger 14 operates as an evaporator in the second mode of the air conditioner 1000, so that the refrigerant after decompression absorbs heat from the outdoor air through the second heat exchanger 14 and evaporates. A second coil is provided in the second heat exchanger 14, and the second coil is connected to the refrigerant circuit. The refrigerant flows in the second coil of the second heat exchanger 14 to exchange heat with the outdoor air.

[0037] As shown in Figure 1, the outdoor unit 10 also includes a second expansion valve 15 (outdoor expansion valve). The second expansion valve 15 is connected between the second heat exchanger 14 and the first expansion valve 22. The opening of the second expansion valve 15 regulates the pressure of the refrigerant flowing through the second heat exchanger 14 and the indoor unit 20, thereby adjusting the refrigerant flow between the second heat exchanger 14 and the first heat exchanger 21. The flow rate and pressure of the refrigerant flowing between the second heat exchanger 14 and the first heat exchanger 21 will affect the heat exchange performance of the second heat exchanger 14 and the indoor unit 20. The opening of the second expansion valve 15 is adjustable to adjust the flow rate and pressure of the refrigerant flowing through the second expansion valve 15. For example, the second expansion valve 15 expands the liquid refrigerant condensed in the condenser into low-pressure liquid refrigerant.

[0038] It should be noted that FIG1 illustrates an example in which the indoor unit 20 includes a first expansion valve 22 and the outdoor unit 10 includes a second expansion valve 15. Of course, in some embodiments, the air conditioner 1000 may also include a single expansion valve. In this case, the expansion valve may be provided in one of the indoor unit 20 and the outdoor unit 10. For example, the indoor unit 20 may include the first expansion valve 22, or the outdoor unit 10 may include the second expansion valve 15.

[0039] As shown in FIG1 , the outdoor unit 10 further includes a gas-liquid separator 16 . The gas-liquid separator 16 is configured to separate the gaseous refrigerant from the liquid refrigerant to reduce the backflow of the liquid refrigerant to the compressor 11 .

[0040] As shown in Figure 1, the outdoor unit 10 also includes a four-way valve 13. The four-way valve 13 is connected to the refrigerant circuit and is configured to switch the flow direction of the refrigerant in the refrigerant circuit so that the air conditioner 1000 operates in the first mode or the second mode. The four-way valve 13 includes four ports: a first port D, a second port S, a third port E, and a fourth port C. The first port D is connected to the output of the oil separator 12; the second port S is connected to the input of the gas-liquid separator 16; the third port E is connected to one end of the second heat exchanger 14; and the fourth port C is connected to one end of the first heat exchanger 21.

[0041] It should be noted that the refrigerant circuit can be mainly formed by the compressor 11, the oil separator 12, the four-way valve 13, the first heat exchanger 21, the first expansion valve 22, the second expansion valve 15, the second heat exchanger 14, the gas-liquid separator 16 and the compressor 11, which are interconnected through piping.

[0042] The following describes the operating mode of the air conditioner 1000 in conjunction with the refrigerant circuit.

[0043] In the first mode of the air conditioner 1000, as shown in Figure 1 , the compressor 11 compresses the refrigerant. The compressed refrigerant, now at high temperature and high pressure, passes through the oil separator 12, which separates the refrigerant from the lubricating oil. The refrigerant then flows through the four-way valve 13 to the second heat exchanger 14, which condenses the gaseous refrigerant into liquid refrigerant. The liquid refrigerant then passes through the second expansion valve 15 and flows to the indoor unit 20. The first expansion valve 22 reduces the pressure and temperature of the liquid refrigerant, and the first heat exchanger 21 evaporates the reduced-pressure and cooled liquid refrigerant into gaseous refrigerant. The gaseous refrigerant then flows back to the outdoor unit 10. The gaseous refrigerant then flows through the four-way valve 13 to the gas-liquid separator 16, which separates the refrigerant into liquid and gaseous refrigerant. The gaseous refrigerant then flows back to the compressor 11. The refrigerant flow is indicated by the solid arrows in Figure 1 .

[0044] When the air conditioner 1000 operates in the first mode, the refrigerant flowing through the first heat exchanger 21 exchanges heat with the indoor air, thereby cooling the indoor air.

[0045] When the air conditioner 1000 operates in the second mode, as shown in Figure 1 , the compressor 11 compresses the gaseous refrigerant to form a high-temperature, high-pressure gaseous refrigerant. This high-temperature, high-pressure gaseous refrigerant passes through the oil separator 12, which separates the refrigerant from the lubricating oil. The refrigerant then flows through the four-way valve 13 to the first heat exchanger 21. The first heat exchanger 21 condenses the gaseous refrigerant into a liquid state, which then flows through the first expansion valve 22 to the outdoor unit 10. The second expansion valve 15 reduces the pressure and temperature of the liquid refrigerant, and the second heat exchanger 14 evaporates the reduced-pressure, cooled liquid refrigerant into a gaseous refrigerant. The gaseous refrigerant then flows through the four-way valve 13 to the gas-liquid separator 16. The gas-liquid separator 16 separates the refrigerant into liquid and gaseous refrigerant. The gaseous refrigerant then flows back to the compressor 11. The refrigerant flow is indicated by the dashed arrows in Figure 1 .

[0046] When the air conditioner 1000 operates in the second mode, the refrigerant flowing through the first heat exchanger 21 exchanges heat with the indoor air, thereby cooling the indoor air.

[0047] In some embodiments, as shown in Figure 1, the outdoor unit 10 further includes a first pipeline 181. The first pipeline 181 is a pipe on the discharge side of the compressor 11. Since the compressor 11 discharges high-pressure refrigerant, the first pipeline 181 can also be called a high-pressure pipeline.

[0048] In some embodiments, as shown in Figure 1, the outdoor unit 10 further includes a second pipeline 182. The second pipeline 182 is a pipe on the suction side of the compressor 11. Since the compressor 11 inhales low-pressure refrigerant, the second pipeline 182 can also be called a low-pressure pipeline.

[0049] In some embodiments, the outdoor unit 10 further includes a first pressure sensor (high-pressure pressure sensor) configured to detect a pressure Pd on the exhaust side of the compressor 11 .

[0050] In some embodiments, the outdoor unit 10 further includes a second pressure sensor (low-pressure pressure sensor). The second pressure sensor is configured to detect the pressure Ps on the suction side of the compressor 11. Typically, the pressure Pd on the discharge side of the compressor 11 is greater than the pressure Ps on the suction side of the compressor 11 (i.e., Pd>Ps).

[0051] In some embodiments, as shown in FIG1 , the outdoor unit 10 further includes a third pipeline 183 (a bypass pipeline). The third pipeline 183 is connected to the first pipeline 181 and the second pipeline 182, respectively. For example, a first end of the third pipeline 183 is connected to the first pipeline 181, and a second end of the third pipeline 183 is connected to the second pipeline 182. The third pipeline 183 is configured to bypass the refrigerant. For example, a portion of the refrigerant discharged from the exhaust side of the compressor 11 can flow to the second pipeline 182 via the third pipeline 183.

[0052] In some embodiments, a first end of the third pipeline 183 is located between the oil separator 12 and the four-way valve 13 , and a second end of the third pipeline 183 is located at an input side of the gas-liquid separator 16 .

[0053] In some embodiments, the second end of the third pipeline 183 may also be located at the output side of the gas-liquid separator 16 .

[0054] Thus, by providing the third pipe 183, a first portion of the refrigerant discharged from the compressor 11 can flow to the four-way valve 13 through the first pipe 181, and a second portion of the refrigerant discharged from the compressor 11 can flow back to the compressor 11 through the third pipe 183. In this way, by extending the flow path of the refrigerant, the pressure on the discharge side of the compressor 11 can be reduced, and the pressure on the suction side of the compressor 11 can be increased, thereby reducing the pressure difference between the discharge side and the suction side of the compressor 11, avoiding excessively high pressure on the discharge side of the compressor 11 and excessively low pressure on the suction side of the compressor 11, thereby protecting the compressor 11.

[0055] In some embodiments, as shown in FIG1 , the outdoor unit 10 further includes a bypass assembly 19 . The bypass assembly 19 is provided in the third pipeline 183 . The bypass assembly 19 includes a solenoid valve 191 . The solenoid valve 191 is configured to control the conduction and disconnection of the third pipeline 183 .

[0056] As shown in Figure 1, bypass assembly 19 also includes a pressure reducer 192 (capillary tube). Pressure reducer 192 is connected in series between solenoid valve 191 and second pipe 182. Pressure reducer 192 is configured to control the flow of refrigerant, thereby increasing the stability of pressure relief in air conditioner 1000. Pressure relief refers to the refrigerant on the discharge side of compressor 11 flowing to the suction side of compressor 11 through third pipe 183, thereby reducing the pressure Pd on the discharge side of compressor 11 and increasing the pressure Ps on the suction side of compressor 11.

[0057] When the pressure Pd on the discharge side of the compressor 11 is greater than or equal to a first preset value (such as 3.6 MPa or 3.9 MPa, etc.), the solenoid valve 191 opens to relieve pressure; when the pressure Pd on the discharge side of the compressor 11 is less than the first preset value, the solenoid valve 191 closes. It should be noted that when the first pressure sensor detects that the pressure Pd on the discharge side of the compressor 11 is higher than the first preset value, or when the pressure Ps on the suction side of the compressor 11 detected by the second pressure sensor is lower than the second preset value (such as 3.5 MPa), at this time, the pressure difference between the pressure Pd on the discharge side of the compressor 11 and the pressure Ps on the suction side of the compressor 11 is higher than the third preset value, the solenoid valve 191 opens to relieve pressure, and the airflow on the discharge side of the compressor 11 will impact the airflow on the suction side of the compressor 11, destroying the stability of the airflow on the suction side of the compressor 11, generating turbulence, and thus generating jet noise.

[0058] To address the above issues, in some embodiments, as shown in FIG2 , the outdoor unit 10 further includes a buffer tank 100. The buffer tank 100 is disposed on the output side of the solenoid valve 191 and is configured to reduce the flow rate of the refrigerant through the third pipeline 183, thereby reducing the bypass noise of the air conditioner 1000.

[0059] It should be noted that the discharge of high-pressure gas is a jet phenomenon formed when high-speed airflow is discharged from an exhaust pipe or nozzle. This jet phenomenon produces relatively strong jet noise. The high-pressure jet gas mixes with the gas on the low-pressure side (e.g., the suction side of the compressor 11), disrupting the stable state of the gas and generating turbulence. This turbulent noise is quadrupole noise, and the radiated power W is proportional to the pressure P, the square of the nozzle diameter D, and the eighth power of the velocity V, as shown in the following formula:

[0060] In this formula, P0 is the density of the medium surrounding the jet, and C0 is the speed of sound of the incident air in air, which is 344 m / s. As can be seen from the above formula, the acoustic power of quadrupole noise is closely related to airflow velocity. Therefore, reducing the flow velocity can significantly reduce turbulent noise.

[0061] Since the bypass noise mainly exists on the side of the third pipeline 183 close to the second pipeline 182, especially on the side of the solenoid valve 191 close to the second pipeline 182, as shown in Figure 2, the buffer tank 100 is arranged between the pressure reducer 192 and the second pipeline 182, which can improve the noise reduction effect of the buffer tank 100.

[0062] In some embodiments, as shown in FIG3 , buffer tank 100 includes a tank body 110. The inner diameter of tank body 110 is larger than the inner diameter of third pipe 183. As a result, when refrigerant flows from third pipe 183 to tank body 110, the refrigerant flow rate is reduced, thereby reducing bypass noise. This bypass noise includes low-frequency, medium-frequency, and high-frequency noise.

[0063] According to the physical laws of bypass noise, the flow velocity of the airflow has a great influence on the bypass noise.

[0064] It should be noted that the end of the tank body 110 away from the first pipeline 181 is closed. In this way, after the refrigerant flows into the buffer tank 100, the refrigerant will impact the end of the buffer tank 100 away from the first pipeline 181, thereby greatly reducing the flow rate of the refrigerant and improving the noise reduction effect.

[0065] As shown in FIG3 , buffer tank 100 further includes an outflow portion 111 . Outflow portion 111 is disposed within tank body 110 and allows refrigerant to flow out of the tank body 110 . Outflow portion 111 is connected to second pipeline 182 , allowing refrigerant within tank body 110 to flow through outflow portion 111 into second pipeline 182 .

[0066] In some embodiments, as shown in FIG4 , tank body 110 includes a first sub-tank body 112 (cylindrical portion). Tank body 110 also includes a second sub-tank body 113 (narrowed portion). Second sub-tank body 113 is connected to one end of first sub-tank body 112. Refrigerant is adapted to enter tank body 110 through second sub-tank body 113 and then flow out through outflow portion 111.

[0067] As shown in FIG3 , the buffer tank 100 further includes an inlet 120 (inlet pipe). A first end of the inlet 120 is connected to the pressure reducer 192 , and a second end of the inlet 120 is in communication with the tank body 110 , allowing the refrigerant to flow into the tank body 110 from the inlet 120 .

[0068] 2 and 4 , the inflow portion 120 includes a first sub-inflow portion 121. At least a portion of the first sub-inflow portion 121 is located outside the tank 110. The inflow portion 120 is connected to the output end of the pressure reducer 192 via the first sub-inflow portion 121.

[0069] 4 , the inlet 120 further includes a second sub-inlet 122 connected to the first sub-inlet 121 . For example, a first end of the second sub-inlet 122 is connected to the first sub-inlet 121 , and a second end of the second sub-inlet 122 is located inside the tank 110 .

[0070] The inlet 120 is plugged into the tank body 110 through the second sub-tank 113 and welded to the tank body 110. For example, the inlet 120 is welded to an end of the second sub-tank 113 away from the first sub-tank 112 to achieve connection between the inlet 120 and the tank body 110.

[0071] It should be noted that the outflow portion 111 and the tank body 110 can be an integral part. For example, the outer wall of the tank body 110 extends outward to form the outflow portion 111. This facilitates the manufacture of the buffer tank 100. Alternatively, the outflow portion 111 and the tank body 110 can be separate parts. For example, the ends of the outflow portion 111 are connected to the tank body 110 by welding. This facilitates the disassembly and maintenance of the buffer tank 100.

[0072] As shown in FIG. 4 , since the refrigerant flows into the tank body 110 from the inlet portion 120 , the depth direction of the tank body 110 is defined to be parallel to the direction of the axis M of the tank body 110 .

[0073] In some embodiments, as shown in FIG. 4 , the extension direction of the outflow portion 111 is perpendicular to the axial direction of the tank body 110 , and the axis L of the outflow portion 111 is perpendicular to the axis M of the tank body 110 .

[0074] In the axial direction of the tank body 110, the end of the second sub-inflow portion 122, distal from the first sub-inflow portion 121, is closer to the first sub-outflow portion 111 than the outflow portion 111. For example, the depth H1 of the inflow portion 120 inserted into the tank body 110 is less than the depth H2 of the outflow portion 111. This provides better refrigerant buffering, thereby reducing bypass noise from the air conditioner 1000.

[0075] It should be noted that, in the axial direction of the tank body 110, the depth of the end of the tank body 110 near the first sub-inflow portion 121 is 0. The depth H1 of the inflow portion 120 inserted into the tank body 110 may refer to the distance from the end of the inflow portion 120 located within the tank body 110 to the end of the tank body 110 near the first sub-inflow portion 121; the depth H2 of the outflow portion 111 may refer to the distance from the end of the outflow portion 111 near the second sub-inflow portion 122 to the end of the tank body 110 near the first sub-inflow portion 121.

[0076] As shown in FIG4 , the axis M of the tank body 110 may be arranged in a transverse direction. The outflow portion 111 is connected to the middle position of the tank body 110 in the transverse direction.

[0077] In some embodiments, the inflow portion 120 extends along the depth direction (axial direction) of the tank body 110, and the outflow portion 111 is located on the peripheral wall of the tank body 110 and extends in a direction perpendicular to the depth direction of the buffer tank 100. In this way, the refrigerant enters the buffer tank 100 along the depth direction of the tank body 110 and flows out in a direction perpendicular to the depth direction of the tank body 110, thereby changing the flow direction of the refrigerant, improving the buffering effect, and reducing noise.

[0078] In some embodiments, as shown in FIG5 , the inlet portion 120 further includes at least one micropore 123. The micropore 123 is provided on a sidewall of the second sub-inlet portion 122. The micropore 123 is configured to disperse the flow of the refrigerant to achieve throttling and pressure reduction, thereby improving the noise reduction effect.

[0079] For example, the size of micropores 123 is less than or equal to 3 mm. The refrigerant flowing out of pressure reducer 192 flows into first sub-inflow section 121 and second sub-inflow section 122 before flowing through micropores 123 to tank body 110. During this period, micropores 123 provide a primary buffer for the refrigerant, and then tank body 110 provides a secondary buffer for the refrigerant, thereby further improving the refrigerant's buffering effect and reducing noise.

[0080] As shown in FIG. 4 , a circular space K is formed between the second sub-inflow portion 122 and the inner wall of the tank body 110 . The provision of the circular space K can prevent the micropores 123 from being blocked by the inner wall of the tank body 110 .

[0081] If the inner diameter of the first sub-tank body 112 is less than 1.5 times the outer diameter of the second sub-inflow portion 122 , the volume of the buffer tank 100 is reduced, thereby weakening the buffering function of the buffer tank 100 and reducing the noise reduction effect.

[0082] In some embodiments, the inner diameter of the first sub-tank body 112 is greater than or equal to 1.5 times the outer diameter of the second sub-inflow portion 122. In this way, the volume of the annular space K can be increased, avoiding the problem of greater resistance to gas flowing from the micropore 123 to the tank body 110 due to the annular space K being too small.

[0083] If the inner diameter of the first sub-tank body 112 is greater than 50 times the outer diameter of the second sub-inflow portion 122 , the volume of the buffer tank 100 is too large, which is not conducive to miniaturization of the air conditioner 1000 .

[0084] In some embodiments, the inner diameter of the first sub-tank body 112 is less than or equal to 50 times the outer diameter of the second sub-inflow portion 122. In this way, when the volume of the buffer tank 100 is increased, the volume of the buffer tank 100 can be avoided from being too large, which is conducive to the miniaturization of the air conditioner 1000.

[0085] 5 and 6 , the at least one micropore 123 includes a plurality of micropores 123 . The plurality of micropores 123 are arranged along the axis direction of the second sub-inflow portion 122 and along the circumference direction of the second sub-inflow portion 122 .

[0086] If the distance between the centers of two adjacent microholes 123 is greater than three times the diameter of the microhole 123 , the number of microholes 123 may be reduced, thereby reducing the buffering effect of the buffer tank 100 and affecting the noise reduction effect.

[0087] In some embodiments, the distance between the centers of two adjacent micropores 123 on the peripheral wall of the inlet portion 120 is less than or equal to three times the diameter of the micropores 123. This allows the number of micropores 123 to be increased while maintaining structural strength, thereby reducing flow velocity and piping vibration. Furthermore, while minimizing pressure loss, the refrigerant bypass time is maintained to avoid affecting the operation of the air conditioner 1000.

[0088] If the distance between the centers of two adjacent micropores 123 is less than 1.2 times the diameter of the micropores 123 , the distance between the centers of the two adjacent micropores 123 is too small, thereby reducing the structural strength of the inflow portion 120 .

[0089] In some embodiments, the distance between the centers of two adjacent microholes 123 is greater than 1.2 times the diameter of the microholes 123 , so that the structural strength of the inflow portion 120 can be increased.

[0090] In some embodiments, as shown in FIG. 5 and FIG. 6 , at least one micropore 123 may be further provided on the end surface of the second sub-inflow portion 122 away from the first sub-inflow portion 121 , so as to increase the number of micropores 123 .

[0091] A noise test was conducted on the third pipeline of the present disclosure and related technologies, and the data is shown in Table 1:

[0092] Table 1

[0093] As can be seen from Table 1, compared with the related art, the noise at the third pipeline 183 in some embodiments of the present disclosure is significantly reduced, thereby improving the noise reduction effect.

[0094] The foregoing mainly takes the outdoor unit 10 including the buffer tank 100 as an example to illustrate how to reduce the flow rate of the refrigerant and thus improve the noise reduction effect. Of course, in some embodiments, the outdoor unit 10 may also include other buffer components to reduce the flow rate of the refrigerant and thus improve the noise reduction effect.

[0095] In some embodiments, as shown in FIG7 , the outdoor unit 10 further includes an eighth pipe 1831 (bypass pipe). A first end of the eighth pipe 1831 is connected to an output end of the pressure reducer 192 .

[0096] 7 to 9 , the outdoor unit 10 further includes a throttle assembly 200 . A first end of the throttle assembly 200 is connected to the second end of the eighth pipe 1831 , and a second end of the throttle assembly 200 is connected to the second pipe 182 .

[0097] 7 to 9 , the throttle assembly 200 includes at least one throttle portion 210 . The throttle portion 210 is connected to the end of the third pipe 183 .

[0098] As shown in Figure 9, the throttling portion 210 includes a fourth pipeline 211. The fourth pipeline 211 forms a closed structure with end-to-end connections.

[0099] As shown in FIG9 , the throttle portion 210 further includes a first end 2121 . The first end 2121 serves as an input end of the throttle portion 210 . The first end 2121 is in communication with a first end of the fourth pipeline 211 . The first end 2121 is connected to the eighth pipeline 1831 .

[0100] As shown in Figure 9, throttle portion 210 further includes a second end 2122. Second end 2122 serves as the output end of throttle portion 210. Second end 2122 is spaced apart from and opposite to first end 2121. Second end 2122 communicates with the second end of fourth pipeline 211. Second end 2122 is connected to second pipeline 182. It should be noted that the positions of first end 2121 and second end 2122 are interchangeable.

[0101] The refrigerant is bypassed and diverted when passing through the input end of throttling section 210, reducing the refrigerant flow rate. Furthermore, the refrigerant in fourth pipe 211 impacts each other when passing through the output end of throttling section 210, further reducing the refrigerant flow rate. When the refrigerant flow rate is reduced to a predetermined flow rate, the impact of the refrigerant on the discharge side of compressor 11 on the gas on the suction side of compressor 11 is reduced, thereby reducing bypass noise and minimizing excessive vibration in the piping due to excessive pulsating pressure.

[0102] In some embodiments, as shown in FIG9 , fourth pipeline 211 includes a first sub-pipeline 2111 and a second sub-pipeline 2112. First end 2121 and second end 2122 divide fourth pipeline 211 into first sub-pipeline 2111 and second sub-pipeline 2112. Thus, after a refrigerant path flows into throttling portion 210 along first end 2121, it is split into two refrigerant paths: the first refrigerant path flows into first sub-pipeline 2111, and the second refrigerant path flows into second sub-pipeline 2112. The first and second refrigerant paths then merge at second end 2122.

[0103] In some embodiments, the throttle portion 210 is configured as a symmetrical structure. As shown in FIG9 , the symmetry line of the throttle portion 210 is defined as N, and the line connecting the centers of the first end 2121 and the second end 2122 coincides with the symmetry line N. For example, the first sub-pipeline 2111 and the second sub-pipeline 2112 are symmetrical with respect to the symmetry line N. In this way, the first sub-pipeline 2111 and the second sub-pipeline 2112 are identical, so that the flow rate of the refrigerant passing through the first sub-pipeline 2111 and the flow rate of the refrigerant passing through the second sub-pipeline 2112 are the same, which helps to improve the buffering effect of the refrigerant and thus improve the noise reduction effect.

[0104] In some embodiments, the at least one throttle portion 210 includes one throttle portion 210 . The first end 2121 is connected to the output end of the pressure reducer 192 , and the second end 2122 is connected to the second pipeline 182 .

[0105] In some embodiments, the at least one throttle portion 210 includes a plurality of throttle portions 210. The plurality of throttle portions 210 are arranged in parallel. For example, a first end 2121 of any throttle portion 210 in the plurality of throttle portions 210 is connected to the output end of the pressure reducer 192, and a second end 2122 of any throttle portion 210 in the plurality of throttle portions 210 is connected to the second pipeline 182.

[0106] It should be noted that the connection positions of the multiple throttle parts 210 and the eighth pipeline 1831 are different, and correspondingly, the connection positions of the multiple throttle parts 210 and the second pipeline 182 are different, so as to achieve parallel connection of the multiple throttle parts 210.

[0107] The following mainly describes the throttling assembly 200 including three throttling parts 210 as an example.

[0108] When the refrigerant on the discharge side of the compressor 11 passes through the throttling assembly 200, the refrigerant is divided into three paths according to the parallel number of the throttling parts 210. Afterwards, each path is divided into two paths at the output end of the corresponding throttling part 210. The two paths of refrigerant are offset at the output end of the throttling part 210 to achieve convergence.

[0109] It should be noted that the parallel connection of the throttling parts 210 causes the refrigerant flow to be split, thereby reducing the flow rate. The refrigerants collide at the output end of the throttling parts 210 to achieve convergence, thereby further reducing the refrigerant flow rate.

[0110] In summary, the refrigerant in the first pipeline 181 is diverted and decelerated for the first time at the connection between the third pipeline 183 and the throttling assembly 200, and then the refrigerant is diverted and decelerated for the second time at the input end of the corresponding throttling section 210. After that, the refrigerant is decelerated for the third time at the output end of the throttling section 210. Therefore, any throttling section 210 among the multiple throttling sections 210 can decelerate the refrigerant three times, reducing the impact of the refrigerant in the third pipeline 183 on the suction side of the compressor 11, reducing noise and vibration of the piping, and thus improving the noise reduction effect.

[0111] In some embodiments, when at least one throttle section 210 includes multiple throttle sections 210, the multiple throttle sections 210 may also be connected in series. Taking two throttle sections 210 connected in series as an example, the input end of the first throttle section 210 is connected to the output end of the pressure reducer 192, the output end of the first throttle section 210 is connected to the input end of the second throttle section 210, and the output end of the second throttle section 210 is connected to the second pipeline 182. In this way, by connecting multiple throttle sections 210 in series, the number of refrigerant counterflows can be increased, thereby improving the effect of reducing the gas flow rate.

[0112] 8 , the throttling assembly 200 further includes at least one fifth pipeline 2100 . Multiple throttling sections 210 are connected in series to form a fifth pipeline 2100 (throttling branch). Multiple fifth pipelines 2100 are connected in parallel between the pressure reducer 192 and the second pipeline 182 .

[0113] For example, as shown in FIG8 , the throttling assembly 200 includes six throttling parts 210 , and every two throttling parts 210 are connected in series to form three fifth pipelines 2100 , and the three fifth pipelines 2100 are connected in parallel with each other.

[0114] In some embodiments, as shown in Figures 9 and 10, the fourth pipeline 211 further includes a first section 2113. The first section 2113 is connected to the first end 2121 and is a circular arc section. The fourth pipeline 211 further includes a second section 2114, which is a straight pipe section. The fourth pipeline 211 further includes a third section 2115. The third section 2115 is connected to the second end 2122 and is also a circular arc section. The fourth pipeline 211 further includes a fourth section 2116, which is a straight pipe section. It should be noted that the smooth circular arc section can reduce the flow resistance of the refrigerant.

[0115] The first section 2113, the second section 2114, the third section 2115, and the fourth section 2116 are connected end to end to form a waist-shaped fourth conduit 211. This allows the throttle portion 210 to be flattened, which reduces the space occupied by the throttle portion 210 compared to a circular shape and increases the compactness of the structure.

[0116] In some embodiments, as shown in FIG11 , the throttle portion 210 further includes two tees, namely a first tee 213 and a second tee 214. The first tee 213 includes three connecting portions, namely a first connecting portion 215, a second connecting portion 216, and a third connecting portion 217. The first connecting portion 215 can serve as the first end 2121 of the throttle portion 210. The second tee 214 includes three connecting portions, namely a fourth connecting portion 221, a fifth connecting portion 222, and a sixth connecting portion 223. The fourth connecting portion 221 can serve as the second end 2122 of the throttle portion 210.

[0117] In some embodiments, as shown in FIG11 , the throttle portion 210 further includes a sixth pipe 218 (bypass pipe). The second connecting portion 216 and the fifth connecting portion 222 are connected via the sixth pipe 218. The sixth pipe 218 corresponds to the second section 2114. For example, the sixth pipe 218 is connected to the second connecting portion 216 and the fifth connecting portion 222 by welding.

[0118] In some embodiments, as shown in FIG11 , the throttle portion 210 further includes a seventh conduit 219. The seventh conduit 219 is spaced apart from the sixth conduit 218. The third connecting portion 217 and the sixth connecting portion 223 are connected via the seventh conduit 219. The seventh conduit 219 corresponds to the fourth section 2116. For example, the seventh conduit 219 is connected to the third connecting portion 217 and the sixth connecting portion 223 by welding.

[0119] The second connection portion 216 and the third connection portion 217 are connected to form the first section 2113, and the fifth connection portion 222 and the sixth connection portion 223 are connected to form the third section 2115. The first tee 213, the second tee 214, the sixth pipeline 218, and the seventh pipeline 219 form the fourth pipeline 211.

[0120] As shown in Figures 10 and 11 , the first tee 213 and the second tee 214 are generally Y-shaped. The middle portion of the first section 2113 extends outward to form a first connecting portion 215 , and the middle portion of the third section 2115 extends outward to form a fourth connecting portion 221 .

[0121] The above mainly describes the outdoor unit 10 as including the buffer tank 100 and the throttling component 200 as an example. Of course, in some embodiments, the outdoor unit 10 may also include the buffer tank 100 and the throttling component 200.

[0122] For example, the buffer tank 100 and the throttle assembly 200 are connected in series. The buffer tank 100 is connected in series between the solenoid valve 191 and the throttle assembly 200, and the output end of the throttle assembly 200 is connected to the second pipeline 182. Alternatively, the throttle assembly 200 is connected in series between the solenoid valve 191 and the buffer tank 100. This can further reduce the flow rate of the refrigerant and the vibration of the piping, thereby further reducing noise and improving the noise reduction effect.

[0123] It should be noted that the sequence numbers of the steps in some embodiments of the present disclosure are only for the purpose of facilitating the description of some embodiments of the present disclosure and should not be construed as limiting the order of the steps. The order of execution of the steps can be determined based on actual needs and is not limited to the order of the steps in some embodiments of the present disclosure. Steps may also be deleted as needed.

[0124] It should be noted that any one of the technical solutions disclosed in the present disclosure can, to a certain extent, solve one or more of the above-mentioned technical problems and achieve certain disclosure purposes; multiple technical disclosures can also be combined into an overall solution to solve one or more of the above-mentioned technical problems and achieve certain disclosure purposes; some of the technical disclosures can also be selected to be combined into an overall solution, while adopting related technologies and inferior solutions, but the inferior trend can be compensated by the means disclosed in this technology, and the above-mentioned one or more technical problems can be solved to a certain extent as a whole and certain disclosure purposes can be achieved; each technical disclosure combined into a complete technical solution constitutes an organic and inseparable overall solution, which solves technical problems as a whole and achieves certain disclosure purposes.

[0125] Any technical disclosure in this disclosure, as well as the recombination of multiple technical disclosures, can form a complete technical solution and can solve one or more of the above-mentioned technical problems and achieve the purpose of disclosure. They all belong to the content of this disclosure and are the content that is directly and unambiguously determined based on the content of this disclosure.

[0126] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims.

Claims

1. An air conditioner, comprising: Indoor unit; as well as The outdoor unit is connected to the indoor unit and includes: compressor; a first pipeline in communication with a discharge side of the compressor; a second pipeline, communicating with the suction side of the compressor; a third pipeline, the third pipeline being connected to the first pipeline and the second pipeline respectively; a solenoid valve, provided in the third pipeline and configured to disconnect or connect the third pipeline; and At least one of the buffer tank or the throttling assembly is configured to buffer the refrigerant flowing from the first pipeline through the third pipeline to the first pipeline.

2. The air conditioner according to claim 1, comprising the buffer tank, wherein the buffer tank is provided in the third pipeline and comprises: a tank body, wherein the inner diameter of the tank body is larger than the inner diameter of the third pipeline; The inflow portion is communicated with the tank body and includes: a first sub-inflow portion, at least a portion of which is located outside the tank body and communicates with the third pipeline; and a second sub-inflow portion, wherein a first end of the second sub-inflow portion is connected to the first sub-inflow portion, and a second end of the second sub-inflow portion is located within the tank body; an outflow portion, provided in the tank body and communicated with the second pipeline; When the solenoid valve connects the third pipeline, the refrigerant entering the second sub-inflow portion through the first sub-inflow portion flows to the second pipeline through the outflow portion.

3. The air conditioner according to claim 2, wherein: The buffer tank also includes at least one micropore; the at least one micropore is provided in the second sub-inflow portion; wherein, when the solenoid valve connects the third pipeline, the refrigerant entering the second sub-inflow portion through the first sub-inflow portion flows to the second pipeline through the at least one micropore.

4. The air conditioner according to claim 3, wherein: The at least one micropore includes a plurality of micropores; the plurality of micropores are arranged along the axial direction of the second sub-inflow portion and along the circumferential direction of the second sub-inflow portion.

5. The air conditioner according to claim 4, wherein The center distance between two adjacent micropores in the plurality of micropores is greater than or equal to 1.2 times the diameter of the micropores and less than or equal to three times the diameter of the micropores.

6. The air conditioner according to any one of claims 3 to 5, wherein: The at least one microhole is provided at an end of the second sub-inflow portion away from the first sub-inflow portion.

7. The air conditioner according to any one of claims 2 to 6, wherein: The inflow portion extends along the axial direction of the tank body, and the outflow portion is located on the peripheral wall of the tank body and extends along a direction perpendicular to the depth direction of the tank body.

8. The air conditioner according to any one of claims 2 to 7, wherein: One end of the tank body away from the first pipeline is closed; the tank body comprises: a first sub-tank; and The second sub-tank body is connected to one end of the first sub-tank body close to the second sub-inflow portion along the axial direction of the tank body, and the inflow portion is plugged into the tank body through the second sub-tank body.

9. The air conditioner according to claim 8, wherein The inner diameter of the first sub-tank body is greater than or equal to 1.5 times the outer diameter of the second sub-inflow portion.

10. The air conditioner according to claim 8 or 9, wherein: The inner diameter of the first sub-tank body is less than or equal to 50 times the outer diameter of the second sub-inflow portion.

11. The air conditioner according to any one of claims 2 to 10, wherein: The depth direction of the tank body is defined to be parallel to the axial direction of the tank body; the outflow portion is located in the middle of the tank body along the depth direction.

12. The air conditioner according to claim 11, wherein Along the axial direction of the tank body, a depth of the inflow portion inserted into the tank body is smaller than a depth of a position where the outflow portion is located.

13. The air conditioner according to any one of claims 1 to 12, further comprising: an oil separator connected to the discharge side of the compressor; a gas-liquid separator, wherein an output end of the gas-liquid separator is connected to a suction side of the compressor; as well as a four-way valve, wherein a first port of the four-way valve is connected to the output end of the oil separator; and a second port of the four-way valve is connected to the input end of the gas-liquid separator; Wherein, the first end of the first pipeline is connected to the output end of the oil separator, and the second end of the first pipeline is connected to the first port of the four-way valve; The first end of the second pipeline is connected to the second port of the four-way valve, and the second end of the second pipeline is connected to the input end of the gas-liquid separator.

14. The air conditioner according to claim 1, comprising the throttling assembly, wherein the throttling assembly is respectively connected to the third pipeline and the second pipeline; the throttling assembly includes at least one throttling part, and any throttling part of the at least one throttling part includes a fourth pipeline, and the fourth pipeline forms a closed structure connected end to end; in, The first end of the throttling section is the input end of the throttling section, and the first end of the throttling section is connected to the first end of the fourth pipeline; the second end of the throttling section is the output end of the throttling section, and the second end of the throttling section is opposite to and spaced from the first end of the throttling section, and the second end of the throttling section is connected to the second end of the fourth pipeline.

15. The air conditioner according to claim 14, wherein The at least one throttle portion includes a plurality of throttle portions, and the plurality of throttle portions are connected in parallel between the second end of the third pipeline and the second pipeline.

16. The air conditioner according to claim 15, wherein The input ends of the plurality of throttling parts are respectively connected to the third pipeline, and the output ends of the plurality of throttling parts are respectively connected to the second pipeline.

17. The air conditioner according to claim 15 or 16, wherein: The throttling assembly further includes a fifth pipeline; at least two throttling parts among the multiple throttling parts are connected in series to form the fifth pipeline, and the fifth pipeline is connected in parallel between the output side of the solenoid valve and the second pipeline.

18. The air conditioner according to any one of claims 14 to 17, wherein: The fourth pipeline includes: a first sub-pipeline; and a second sub-pipeline, symmetrical to the first sub-pipeline with respect to a line connecting the center of the first end of the throttle portion and the center of the second end of the throttle portion; The first end of the throttling portion and the second end of the throttling portion divide the fourth pipeline into the first sub-pipeline and the second sub-pipeline.

19. The air conditioner according to any one of claims 14 to 17, wherein: The fourth pipeline includes: The first section is connected to the first end of the throttling portion and is in an arc shape; The second section is straight line; The third section is connected to the second end of the throttling portion and is in an arc shape; and The fourth section is straight; The first section, the second section, the third section and the fourth section are connected end to end to form the fourth pipeline.

20. The air conditioner according to claim 19, wherein The throttling unit further includes: a sixth pipeline, configured as the second section; a seventh pipeline, configured as the fourth section, and spaced apart from the sixth pipeline; The first three links include: The first connecting portion is the first end of the fourth pipeline; a second communication portion; and a third connecting portion; and Second and third links; The fourth connecting portion is the second end of the fourth pipeline; a fifth connecting portion connected to the second connecting portion through the sixth pipeline; and The sixth connecting portion is connected to the third connecting portion through the seventh pipeline.

21. The air conditioner according to claim 20, wherein The second communicating portion and the third communicating portion are communicated with each other to form the first section; the fifth communicating portion and the sixth communicating portion are communicated with each other to form the third section.

22. The air conditioner according to claim 1, comprising: The buffer tank is provided in the third pipeline and includes: a tank body, wherein the inner diameter of the tank body is larger than the inner diameter of the third pipeline; The inflow portion is communicated with the tank body and includes: a first sub-inflow portion, at least a portion of which is located outside the tank body and communicates with the third pipeline; and a second sub-inflow portion, wherein a first end of the second sub-inflow portion is connected to the first sub-inflow portion, and a second end of the second sub-inflow portion is located within the tank body; an outflow portion, provided in the tank body and communicated with the second pipeline; Wherein, when the solenoid valve connects the third pipeline, the refrigerant entering the second sub-inflow portion through the first sub-inflow portion flows to the second pipeline through the outflow portion; and The throttling assembly is connected to the third pipeline and the second pipeline respectively; the throttling assembly includes at least one throttling part, any throttling part of the at least one throttling part includes a fourth pipeline, and the fourth pipeline forms a closed structure connected end to end; Among them, the first end of the throttling section is the input end of the throttling section, and the first end of the throttling section is connected to the first end of the fourth pipeline; the second end of the throttling section is the output end of the throttling section, the second end of the throttling section is opposite to and spaced from the first end of the throttling section, and the second end of the throttling section is connected to the second end of the fourth pipeline.

23. The air conditioner according to claim 22, wherein The buffer tank, the solenoid valve, and the throttling assembly meet one of the following requirements: The buffer tank is connected in series between the solenoid valve and the throttling assembly, and The throttling assembly is connected in series between the solenoid valve and the buffer tank.

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