Compressor and multi-split air conditioner

Abstract

The compressor comprises a shell, a containing cavity is formed in the shell, a compression mechanism is arranged in the containing cavity, the compression mechanism comprises two air cylinders, the compressor further comprises an air suction pipeline, and the air suction pipeline is configured to supply a gaseous refrigerant of an external gas-liquid separator into a compression cavity of the compression mechanism. The air suction pipeline comprises a first air suction pipe, two second air suction pipes and a tee joint, the first air suction pipe is configured to be communicated with an air outlet pipe of the external air-liquid separator, the two second air suction pipes are configured to be correspondingly communicated with the two air cylinders respectively, the tee joint comprises a first connecting port and two second connecting ports, the first connecting port is communicated with the second connecting ports, and the second connecting ports are communicated with the first connecting port. The two second connecting ports are arranged side by side, the opening of the first connecting port faces upwards to be connected with the first air suction pipe, the opening of the second connecting port faces downwards to be connected with the second air suction pipe, and the two second connecting ports are correspondingly communicated with the two second air suction pipes respectively. And the compressor is connected with the external gas-liquid separator through the air suction pipeline, so that the cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and particularly to a compressor and a multi-connected air conditioner. Background Art

[0002] An air conditioner includes 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, a condenser, an expansion valve, and an evaporator. The compressor is fixedly arranged in the outdoor unit. In a rotary compressor, the compressor generally consists of a compressor body and a first gas-liquid separator, and the first gas-liquid separator is configured to complete the separation of the liquid refrigerant and the gaseous refrigerant to prevent the liquid refrigerant from entering the compression chamber of the compressor body and causing abnormal operation of the compressor.

[0003] In a large multi-connected air conditioner system, a second gas-liquid separator is further configured outside the compressor, and the second gas-liquid separator also functions to separate the liquid refrigerant. Therefore, the first gas-liquid separator is a redundant structure, increasing the overall cost of the machine.

[0004] The above information disclosed in this background art is only used to increase the understanding of the background art of the present application. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Invention

[0005] In view of the problems pointed out in the background art, the present disclosure provides a compressor and a multi-connected air conditioner to reduce costs.

[0006] On the one hand, a compressor is provided. The compressor includes a housing, an accommodation cavity is formed in the housing, a compression mechanism is arranged in the accommodation cavity, the compression mechanism includes two cylinders, the compressor further includes an intake pipe, and the intake pipe is configured to supply the gaseous refrigerant of an external gas-liquid separator into the compression cavity of the compression mechanism. The intake pipe includes a first intake pipe, two second intake pipes, and a tee. The first intake pipe is configured to communicate with the outlet pipe of the external gas-liquid separator, the two second intake pipes are configured to communicate with the two cylinders respectively, the tee includes a first connection port and two second connection ports, the first connection port is communicated with the second connection ports, the two second connection ports are arranged side by side, the opening of the first connection port faces upward to be connected with the first intake pipe, the opening of the second connection port faces downward to be connected with the second intake pipe, and the two second connection ports are respectively communicated with the two second intake pipes.

[0007] By connecting the compressor with an external gas-liquid separator through the intake pipe, the cost is reduced.

[0008] The tee is of a pants-type tee structure, the first connection port faces upward, and the second connection ports face downward. The gaseous refrigerant flowing out of the second gas-liquid separator flows through the first intake pipe and the two second intake pipes from top to bottom, and is distributed into the two cylinders through the two second intake pipes, improving the distribution uniformity of the refrigerant.

[0009] On the other hand, a multi-connected air conditioner is provided. The multi-connected air conditioner includes an outdoor unit and a plurality of indoor units. The outdoor unit is connected to the plurality of indoor units. The outdoor unit includes a compressor and a gas-liquid separator. The compressor is the compressor as described above, and the first suction pipe communicates with the outlet pipe of the gas-liquid separator.

[0010] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 FIG. is a structural diagram of a compressor according to some embodiments;

[0013] Figure 2 FIG. is a cross-sectional view of a compressor according to some embodiments;

[0014] Figure 3 FIG. is a structural diagram of a bearing according to some embodiments;

[0015] Figure 4 FIG. is an exploded view of a bearing according to some embodiments;

[0016] Figure 5 FIG. is a cross-sectional view of a bearing according to some embodiments;

[0017] Figure 6 FIG. is a structural diagram of a first bearing portion according to some embodiments;

[0018] Figure 7 FIG. is a structural diagram of a bearing bush according to some embodiments;

[0019] Figure 8 FIG. is another cross-sectional view of a bearing according to some embodiments;

[0020] Figure 9 FIG. is a graph showing the relationship between θ1 / φ + θ2 / φ and the height of the compressor oil sump / the height of the installation cavity, and the oil discharge rate according to some embodiments;

[0021] Figure 10 FIG. is a graph showing the relationship between N1 / N2 and the height of the compressor oil sump / the height of the installation cavity, and the oil discharge rate according to some embodiments;

[0022] Figure 11 Graph of the relationship between T / D and the height of the compressor oil sump / height of the installation cavity, and the oil discharge rate according to some embodiments;

[0023] Figure 12 Graph of the relationship between D1 / D2 and the contact surface pressure height according to some embodiments;

[0024] Figure 13 Graph of the relationship between H1 / H2 and the contact surface pressure height according to some embodiments;

[0025] Figure 14 Graph of the relationship between D2 / D3 and the contact surface pressure height according to some embodiments;

[0026] Figure 15 Graph of the relationship between (T1 + T2) / D4 and the contact surface pressure height according to some embodiments;

[0027] Figure 16 Structural diagram of an eccentric crankshaft according to some embodiments;

[0028] Figure 17 Exploded view of an eccentric crankshaft according to some embodiments;

[0029] Figure 18 Cross-sectional view of an eccentric crankshaft according to some embodiments;

[0030] Figure 19 Structural diagram of an eccentric shaft section according to some embodiments;

[0031] Figure 20 Exploded view of an eccentric shaft section according to some embodiments;

[0032] Figure 21 Schematic diagram of a multi-connected air conditioner according to some embodiments;

[0033] Figure 22 Structural diagram of a compressor and a gas-liquid separator according to some embodiments;

[0034] Figure 23 Another structural diagram of a compressor according to some embodiments;

[0035] Figure 24 Another cross-sectional view of a compressor according to some embodiments;

[0036] Figure 25 Structural diagram of a tee according to some embodiments;

[0037] Figure 26 Structural diagram of a fixing part according to some embodiments. Detailed implementation manners

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0040] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0041] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the contact between the first and second features not being direct but through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0043] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0044] [Air conditioner]

[0045] In some embodiments, the air conditioner performs a refrigeration cycle or a heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle or the heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0046] The low-temperature and low-pressure refrigerant enters the compressor, and the compressor compresses the low-temperature and low-pressure refrigerant into a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed gas refrigerant into a liquid-phase refrigerant and releases the heat of the refrigerant to the surrounding environment through the condensation process.

[0047] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant formed by condensation in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by using the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. During the entire refrigeration cycle or heating cycle, the air conditioner can adjust the temperature of the indoor space.

[0048] The outdoor unit of the air conditioner includes a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0049] The indoor heat exchanger and the outdoor heat exchanger are used as condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner operates in the heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner operates in the refrigeration mode.

[0050] The outdoor unit also includes a four-way valve configured to enable the conversion of the indoor heat exchanger and the outdoor heat exchanger as condensers or evaporators.

[0051] The refrigeration working principle of the air conditioner is as follows: The compressor operates to make the indoor heat exchanger (in the indoor unit, which is the evaporator at this time) in a super-low pressure state. The liquid refrigerant in the indoor heat exchanger rapidly evaporates and absorbs heat. The air blown by the indoor fan passes through the coils of the indoor heat exchanger and cools down to become cold air and is blown into the room. After the refrigerant evaporates and vaporizes, it is pressurized by the compressor and condenses into a liquid under the high-pressure environment in the outdoor heat exchanger (in the outdoor component, which is the condenser at this time), releasing heat. Through the outdoor fan, the heat is dissipated into the atmosphere, and such a cycle achieves the refrigeration effect.

[0052] The heating working principle of the air conditioner is as follows: The gaseous refrigerant is pressurized by the compressor to become a high-temperature and high-pressure refrigerant gas. The refrigerant gas enters the indoor heat exchanger (which is the condenser at this time), condenses and liquefies to release heat, becomes a liquid, and heats the indoor air, thereby achieving the purpose of raising the indoor temperature. The liquid refrigerant is depressurized by the throttling device and enters the outdoor heat exchanger (which is the evaporator at this time), evaporates and vaporizes to absorb heat, becomes a gas, and absorbs the heat of the outdoor air (the temperature of the outdoor air decreases), becomes a gaseous refrigerant, and the gaseous refrigerant enters the compressor again to start the next cycle.

[0053] [Compressor body]

[0054] In some embodiments of the present disclosure, the compressor is a rolling piston compressor. Refer to Figure 1 and Figure 2 , the compressor includes a compressor body 100. The compressor body 100 includes a first housing 110. The compressor body 100 further includes a receiving cavity 111. A closed receiving cavity 111 is formed inside the first housing 110. The compressor body 100 further includes a compression mechanism 120. The compression mechanism 120 is disposed in the receiving cavity 111. The compression mechanism 120 is configured to compress the refrigerant. The compressor body 100 further includes a motor 130. The motor 130 is disposed inside the receiving cavity 111. The motor 130 is disposed above the compression mechanism 120. The motor 130 is configured to provide power for the compression mechanism 120.

[0055] In some embodiments, the motor 130 includes a rotor 132. The motor 130 further includes a stator 131. The stator 131 is fixedly connected to the inner wall of the first housing 110 to realize the fixed installation of the motor 130 in the receiving cavity 11.

[0056] In some embodiments, refer to Figure 2 , the compression mechanism 120 further includes an eccentric crankshaft 140.

[0057] The eccentric crankshaft 140 includes a main shaft section 141; the eccentric crankshaft 140 further includes an eccentric shaft section 142. The main shaft section 141 is fixedly connected to the rotor 132.

[0058] Refer to Figure 2, the compression mechanism 120 further includes a cylinder 122; the compression mechanism 120 further includes a piston 123. A piston 123 is disposed in the compression chamber of the cylinder 122, and the piston 123 is sleeved on the eccentric shaft section 142. The compression mechanism 120 further includes at least one bearing 703. For example, the at least one bearing 703 includes two bearings 703, namely a first bearing 1241 and a second bearing 1242. The bearing 703 is fixedly connected to the cylinder 122, the first bearing 1241 is fixedly connected to the inner wall of the first housing 110, and an exhaust hole is provided on the bearing 703, and the exhaust hole communicates with the compression chamber; the compression mechanism 120 further includes a vane slot; the vane slot is disposed in the cylinder 122. The compression mechanism 120 further includes a vane. The vane is disposed in the vane slot. The eccentric crankshaft 121 drives the piston 123 to perform a circumferential movement in the compression chamber, the vane reciprocates along the vane slot, and the vane always abuts against the piston 123. The compression chamber includes a first sub-compression chamber (high-pressure chamber); the compression chamber further includes a second sub-compression chamber (low-pressure chamber). The pressure in the first sub-compression chamber is greater than the pressure in the second sub-compression chamber. The vane and the piston 123 divide the compression chamber into the first sub-compression chamber and the second sub-compression chamber. The compression mechanism 120 further includes at least one muffler 704. For example, the at least one muffler 704 includes two mufflers 704, namely a first muffler 1261 and a second muffler 1262. The first muffler 1261 is disposed on the first bearing 1241, and the second muffler 1262 is disposed on the second bearing 1242.

[0059] The working principle of the compressor is as follows: After the stator 131 of the motor 130 is energized, a magnetic pulling force is generated. The rotor 132 of the motor 130 performs a rotational movement under the action of the magnetic pulling force of the stator 131, and drives the eccentric crankshaft 140 to perform a rotational movement together. The rotation of the eccentric crankshaft 140 drives the piston 123 sleeved on the eccentric shaft section to perform an eccentric circular motion in the compression chamber of the cylinder 122. The vane performs a reciprocating movement in the vane slot. The vane and the piston 123 divide the compression chamber of the cylinder 122 into a first sub-compression chamber and a second sub-compression chamber. When the eccentric crankshaft 140 drives the piston 123 to rotate one week, the gas is inhaled from the second sub-compression chamber and exhausted from the first sub-compression chamber to complete one exhaust, realizing the compression of the gas by the compressor. The compressed gas is discharged through the exhaust hole.

[0060] In an embodiment of the present disclosure, refer to Figure 2 , the compressor is a single-cylinder rolling rotor type compressor.

[0061] In some embodiments of the present disclosure, refer to Figure 24, the compressor is a twin-cylinder rolling piston compressor, and the compression mechanism 120 includes an eccentric crankshaft 140. The compression mechanism 120 further includes two cylinders 701, namely a first cylinder 1221 and a second cylinder 1222. The compression mechanism 120 further includes two bearings 703, namely a first bearing 1241 and a second bearing 1242. The compression mechanism 120 further includes two pistons 702, namely a first piston 1231 and a second piston 1232. The compression mechanism 120 further includes a middle partition plate 125. The compression mechanism 120 further includes two mufflers 704, namely a first muffler 1261 and a second muffler 1262.

[0062] [First gas-liquid separator]

[0063] In some embodiments, referring to Figure 1 , the compressor further includes a first gas-liquid separator 510. The first gas-liquid separator 510 is disposed outside the compressor body 100 and is configured to supply gaseous refrigerant to the compression chamber of the compression mechanism 120. The first gas-liquid separator 510 separates the liquid refrigerant from the gaseous refrigerant to prevent the liquid refrigerant from entering the compression chamber of the compressor body 100 and causing abnormalities in the compressor.

[0064] In some embodiments, referring to Figure 1 , the first gas-liquid separator 510 includes a second housing 512; the first gas-liquid separator 510 further includes a first gas outlet pipe 511, and the first gas outlet pipe 511 is disposed at the bottom of the second housing 512. The first end of the first gas outlet pipe 511 extends into the inner cavity of the second housing 512, and the second end of the first gas outlet pipe 511 is connected to the compression mechanism 120. For example, the second end of the gas outlet pipe 240 is connected to the suction port of the cylinder to supply gaseous refrigerant to the compression mechanism 120.

[0065] [Bearing]

[0066] In some embodiments, referring to Figure 3 and Figure 6 , the bearing 150 includes an exhaust hole 1511, and the exhaust hole 1511 communicates with the inner cavity of the cylinder 122. The exhaust hole 1511 is configured to discharge the refrigerant in the cylinder 122.

[0067] Referring to Figure 2 , Figure 4 and Figure 6 , the compression mechanism 120 includes an exhaust valve plate 170. The exhaust valve plate 170 is configured to open or close the exhaust hole 1511. When the exhaust valve plate 170 moves toward the exhaust hole 1511, the exhaust valve plate 170 covers the exhaust hole 1511 and the exhaust hole 1511 is closed. When the exhaust valve plate 170 moves away from the exhaust hole 1511, the exhaust hole 1511 is opened.

[0068] Reference Figure 4 The exhaust valve plate 170 includes a first end 171; the exhaust valve plate 170 further includes a second end 172; the exhaust valve plate 170 further includes a first connecting section 173. The first connecting section 173 is connected between the first end 171 and the second end 172.

[0069] Reference Figure 6 The bearing 150 further includes a bearing body; the bearing 150 further includes a mounting hole 1516. The mounting hole 1516 is provided in the bearing body, and the first end 171 of the exhaust valve plate 170 is fixedly arranged on the bearing 150. For example, referring to Figure 4 and Figure 6 the first end 171 of the exhaust valve plate 170 is fixedly mounted to the mounting hole 1516 through a bolt 190. The second end 172 of the exhaust valve plate 170 is configured to close or open the exhaust hole 1511.

[0070] The compression mechanism 120 further includes a lift limiter 180, and the lift limiter 180 is configured to limit the opening stroke of the exhaust valve plate 170.

[0071] In some disclosed compressors, during the movement of the exhaust valve plate 170, there is noise generated by hitting the bearing 150, increasing the operating noise of the compressor, and the opening resistance of the exhaust valve plate 170 is large.

[0072] To solve this technical problem, in some embodiments, referring to Figure 3 and Figure 6 the bearing 150 further includes a first groove 1512. The first groove 1512 is arranged around the exhaust hole 1511. The bearing 150 further includes an abutting portion 1515. An abutting portion 1515 is formed between the first groove 1512 and the exhaust hole 1511. The abutting portion 1515 is located between the first groove 1512 and the exhaust hole 1511, and the first groove 1512 is configured to store oil.

[0073] The bearing 150 further includes at least one second groove 1513, and the second groove 1513 is configured to store oil. When the compressor operates, the oil in the oil sump at the bottom of the compressor is supplied to each friction pair through the eccentric crankshaft 140, and the first groove 1512 and the second groove 1513 are filled with oil.

[0074] The second groove 1513 is located between the first end 171 and the second end 172 of the exhaust valve plate 170, and the exhaust valve plate 170 is further configured to: when the exhaust valve plate 170 is closed, the exhaust valve plate 170 covers the first groove 1512 and the second groove 1513 and abuts against the abutting portion 1515.

[0075] When the exhaust valve plate 170 is closed, the exhaust valve plate 170 covers the first groove 1512 and abuts against the abutting portion 1515. Oil is stored in the first groove 1512, and the exhaust valve plate 170 contacts the oil to form an oil seal, thereby improving the sealing effect of the exhaust hole 1511.

[0076] The outer surface of the abutting portion 1515 is a plane so that the abutting portion 1515 abuts against the exhaust valve plate 170 to improve the sealing effect.

[0077] The width of the abutting portion 1515 is narrow, reducing the contact area between the exhaust valve plate 170 and the abutting portion 1515, thereby reducing the opening resistance of the exhaust valve plate 170.

[0078] When the exhaust valve plate 170 is closed, the exhaust valve plate 170 covers the second groove 1513. The second groove 1513 is filled with oil, and the second groove 1513 plays a role in shock absorption, which can reduce the impact sound when the exhaust valve plate 170 hits the bearing 150 when the exhaust valve plate 170 is closed, thereby reducing the operating noise of the compressor.

[0079] In some embodiments, referring to Figure 6 , at least one second groove 1513 includes a plurality of second grooves 1513, and the plurality of second grooves 1513 are arranged at intervals along the length direction of the exhaust valve plate 170 to improve the noise reduction effect of the impact sound of the exhaust valve plate 170.

[0080] In some embodiments, when the exhaust valve plate 170 is closed, the first connecting section 173 covers the second groove 1513, the second end 172 covers the first groove 1512, and the second end 172 closes the exhaust hole 1511.

[0081] Most of the impact sound of the exhaust valve plate 170 is generated by the first connecting section 173 hitting the bearing 150. In the compressor of some embodiments of the present disclosure, the first connecting section 173 is provided to cover the second groove 1513, and the second groove 1513 is used to reduce the impact sound of the first connecting section 173 hitting the bearing 150, thereby improving the noise reduction effect.

[0082] When the exhaust valve plate 170 is closed, the second end 172 of the exhaust valve plate 170 is configured to cover the exhaust hole 1511 to close the exhaust hole 1511. In the compressor of some embodiments of the present disclosure, when the exhaust valve plate 170 is closed, the second end 172 covers the first groove 1512, and the second end 172 abuts against the abutting portion 1515 to improve the sealing effect of the exhaust hole 1511.

[0083] In some embodiments, referring to Figure 4 and Figure 6, the bearing 150 further includes a first bearing portion 151. An exhaust hole 1511, a first groove 1512, at least one second groove 1513, and a mounting hole 1516 are provided on the first bearing portion 151. The bearing 150 further includes a first opening 1514. The first opening 1514 is provided on the first bearing portion 151.

[0084] Referring to Figure 4 , the bearing 150 further includes a second bearing portion 152. The second bearing portion 152 is fixedly provided on the first bearing portion 151. The second bearing portion 152 is fixedly provided on one side of the first bearing portion 151. The second bearing portion 152 includes a first shaft hole 1522, and the first shaft hole 1522 communicates with the first opening 1514. The main shaft section 141 of the eccentric crankshaft 140 passes through the first shaft hole 1522 and the first opening 1514 to realize the installation of the eccentric crankshaft 140 and the bearing 150.

[0085] The bearing 150 in some embodiments of the present disclosure includes two structural parts (the first bearing portion 151 and the second bearing portion 152), which is convenient for processing and manufacturing.

[0086] The bearing 150 is usually a casting, with a low elastic modulus, and there is a large amount of wear between the bearing 150 and the eccentric crankshaft 140. The processing process of the bearing 150 includes casting, mechanical rough machining, mechanical finish machining, phosphating, brushing, etc. The processing process is complex and costly. Processing processes such as casting and phosphating consume fossil fuels and pollute the environment.

[0087] To solve this technical problem, in some embodiments, the first bearing portion 151 is configured as a sheet metal stamping part. The second bearing portion 152 is configured as a metal tube, and a first shaft hole 1522 is formed inside the metal tube. The first bearing portion 151 and the second bearing portion 152 are fixedly welded.

[0088] The bearing 150 in some embodiments of the present disclosure has a low cost, and the processing process is simplified, including stamping, finish machining, and welding. The processing process can reduce environmental pollution.

[0089] The bearing 150 in some embodiments of the present disclosure uses a sheet metal stamping part and a metal pipe, and the material is any one of steel, cast iron, and alloy. The elastic modulus is large, which can reduce the friction between the bearing 150 and the eccentric crankshaft 140.

[0090] In some embodiments, referring to Figure 3 and Figure 4 , the bearing 150 further includes a plurality of reinforcing portions 153. The plurality of reinforcing portions 153 are arranged at intervals along the circumferential direction of the second bearing portion 152. The plurality of reinforcing portions 153 are connected to the first bearing portion 151 to improve the structural reliability of the first bearing portion 151 and the second bearing portion 152.

[0091] The reinforcing portion 153 has a rib structure, and the reinforcing portion 153 is welded to the first bearing portion 151 and the second bearing portion 152 respectively.

[0092] In some embodiments of the disclosed compressor, referring to Figure 8 , the bearing 150 further includes an oil groove 154. An oil groove 154 is provided on the inner wall of the shaft hole (the first shaft hole 1522) of the bearing 150. The oil groove 154 generally rises in an equal-shaped curve or linearly. When the compressor operates at a low frequency, there is no oil in the oil groove 154, and the friction between the bearing 150 and the eccentric crankshaft 140 is large, thereby increasing the frictional noise of the compressor. When the compressor operates at a high frequency, the excess oil supply is discharged through the oil groove 154, and the oil discharge rate of the compressor increases, thereby reducing the performance of the compressor.

[0093] To solve this technical problem, in some embodiments, referring to Figure 8 , the bearing 150 includes a first shaft hole 1522, and the eccentric crankshaft 140 passes through the first shaft hole 1522. An oil groove 154 is provided on the hole wall of the first shaft hole 1522.

[0094] The oil groove 154 includes a plurality of first sub-oil grooves 1541; the oil groove 154 further includes a plurality of second sub-oil grooves 1542. The first sub-oil grooves 1541 and the second sub-oil grooves 1542 are alternately arranged along the axial direction of the first shaft hole 1522, and adjacent first sub-oil grooves 1541 and second sub-oil grooves 1542 are communicated. The first sub-oil grooves 1541 extend along the axial direction of the first shaft hole 1522, and the first sub-oil grooves 1541 are straight grooves. The second sub-oil grooves 1542 extend spirally along the circumferential direction of the first shaft hole 1522, and the second sub-oil grooves 1542 are spiral grooves.

[0095] For example, referring to Figure 8 , three first sub-oil grooves 1541 and two second sub-oil grooves 1542 are provided on the hole wall of the first shaft hole 1522.

[0096] The oil groove 154 in some embodiments of the present disclosure is a composite oil groove composed of linear first sub-oil grooves 1541 and spiral second sub-oil grooves 1542. First, when the compressor operates at a low frequency, the oil groove 154 can reliably transport the oil to the friction pair, avoiding oil-free lubrication friction of the friction pair components (such as the eccentric crankshaft 140 and the bearing 150); second, when the compressor operates at a high frequency, excessive oil supply is avoided, and the oil discharge rate is reduced; third, reasonable oil supply can effectively reduce the frictional noise of the compressor, thereby reducing the vibration and noise of the compressor.

[0097] In some embodiments, the oil groove 154 includes N1 first sub-oil grooves 1541, the oil groove 154 includes N2 second sub-oil grooves 1542, 3.5 < N1 / N2 < 4.6, and within this range, the ratio of the height of the compressor oil sump to the height of the installation cavity is reasonable and the oil discharge rate of the compressor is good.Figure 10 It is a relationship diagram of N1 / N2 with the height of the compressor oil sump / the height of the installation cavity and the oil discharge rate. Curve M is the curve of the compressor oil discharge rate, and curve L is the curve of the ratio of the height of the compressor oil sump / the height of the installation cavity.

[0098] In some embodiments, the depth of the oil sump 154 is T. Refer to Figure 8 , the depth T of the oil sump is the opening depth of the oil sump 154 along the height H2 direction perpendicular to the first shaft hole 1522. The aperture of the first shaft hole 1522 is D, and 0.15 < T / D < 0.21. Within this range, the ratio of the height of the compressor oil sump / the height of the installation cavity is reasonable and the oil discharge rate of the compressor is good. Figure 11 It is a relationship diagram of T / D with the height of the compressor oil sump / the height of the installation cavity and the oil discharge rate. Curve M is the curve of the compressor oil discharge rate, and curve L is the curve of the ratio of the height of the compressor oil sump / the height of the installation cavity.

[0099] In some embodiments, the starting angle of the oil sump 154 is θ1, the ending angle of the oil sump 154 is θ2, and the pitch of the second sub-oil sump 1542 is φ. 1.6 < θ1 / φ + θ2 / φ < 2.9. Within this range, the ratio of the height of the compressor oil sump / the height of the installation cavity is reasonable and the oil discharge rate of the compressor is good. Figure 9 It is a relationship diagram of θ1 / φ + θ2 / φ with the height of the compressor oil sump / the height of the installation cavity and the oil discharge rate. Curve M is the curve of the compressor oil discharge rate, and curve L is the curve of the ratio of the height of the compressor oil sump / the height of the installation cavity.

[0100] In the compressors of some disclosed embodiments, the contact surface pressure height between the bearing 150 and the eccentric crankshaft 140 is small, which is not conducive to forming an oil film between the two, and the friction between the two is large, thereby increasing the friction noise of the compressor and reducing the performance of the compressor. Among them, under the combined loads such as gas load, centrifugal force, and electromagnetic force of the compressor, the pressure generated by the mutual force on the contact surface between the bearing 150 and the eccentric crankshaft 140 is the contact surface pressure, and the axial height of the contact surface between the bearing 150 and the eccentric crankshaft 140 is the contact surface pressure height.

[0101] To solve this technical problem, in some embodiments, refer to Figure 8 , the bearing 150 further includes a first bearing portion 151; the bearing 150 further includes a sixth groove 1517. The sixth groove 1517 is provided on the first bearing portion 151.

[0102] The bearing 150 includes a second bearing portion 152, and the second bearing portion 152 is connected to the first bearing portion 151. The second bearing portion 152 extends toward one side of the first bearing portion 151. For example, the first bearing portion 151 and the second bearing portion 152 are of an integral structure. Another example is that the first bearing portion 151 and the second bearing portion 152 are of a split structure and are fixed by welding.

[0103] A first shaft hole 1522 is formed in the second bearing portion 152. The eccentric crankshaft 140 passes through the first shaft hole 1522, and the sixth groove 1517 surrounds the first shaft hole 1522.

[0104] The height of the sixth groove 1517 along the axial direction of the first shaft hole 1522 is H1, and the height of the bearing 150 along the axial direction of the first shaft hole 1522 is H2. 0.12 < H1 / H2 < 0.25. Within this range, the contact surface pressure height between the eccentric crankshaft 140 and the bearing 150 is large, which is conducive to forming an oil film between the two, the friction between the two is small, thereby reducing the friction noise of the compressor and improving the performance of the compressor. Figure 13 The figure showing the relationship between H1 / H2 and the contact surface pressure height is shown.

[0105] In some embodiments, referring to Figure 8 , the inner diameter of the sixth groove 1517 is D2, and the extension dimension of the first bearing portion 151 perpendicular to the second bearing portion 152 is D3. 0.1 < D2 / D3 < 0.24. Within this range, the contact surface pressure height between the eccentric crankshaft 140 and the bearing 150 is large, which is conducive to forming an oil film between the two, the friction between the two is small, thereby reducing the friction noise of the compressor and improving the performance of the compressor. Figure 14 The figure showing the relationship between D2 / D3 and the contact surface pressure height is shown.

[0106] In some embodiments, referring to Figure 8 , the outer diameter of the sixth groove 1517 is D1, and the inner diameter of the sixth groove 1517 is D2. 0.9 < D1 / D2 < 1.65. Within this range, the contact surface pressure height between the eccentric crankshaft 140 and the bearing 150 is large, which is conducive to forming an oil film between the two, the friction between the two is small, thereby reducing the friction noise of the compressor and improving the performance of the compressor. Figure 12 The figure showing the relationship between D1 / D2 and the contact surface pressure height is shown.

[0107] In some embodiments, referring to Figure 8 , the outer diameter of the sixth groove is D1, the inner diameter of the sixth groove 1517 is D2, T1 = D1 - D2, and the second bearing portion 152 includes a shaft neck portion 1521. The extension dimension of the shaft neck portion 1521 perpendicular to the second bearing portion 152 is T2. Referring to Figure 2 , the outer diameter of the rotor 132 is D4. 0.095 < (T1 + T2) / D4 < 0.15. Within this range, the contact surface pressure height between the eccentric crankshaft 140 and the bearing 150 is large, which is conducive to forming an oil film between the two, the friction between the two is small, thereby reducing the friction noise of the compressor and improving the performance of the compressor. Figure 15 The figure showing the relationship between (T1 + T2) / D4 and the contact surface pressure height is shown.

[0108] [Bearing shell]

[0109] In some disclosed compressors, the bearing 150 is usually sleeved outside the eccentric crankshaft 140. The wear between the bushing 144 and the eccentric crankshaft 140 is large, increasing the frictional noise of the compressor and reducing the performance of the compressor.

[0110] To solve this technical problem, in some embodiments, referring to Figure 4 , Figure 5 and Figure 7 , the compression mechanism 120 includes two bearing shells 160. The bearing shells 160 are disposed in the first shaft hole 1522. For example, the bearing shells 160 are press-fitted into the first shaft hole 1522.

[0111] The two bearing shells 160 are axially spaced along the first shaft hole 1522. The bearing shell 160 includes a second shaft hole 161, and the eccentric crankshaft 140 passes through the second shaft hole 161. There is a gap 163 between the two bearing shells 160, and the gap 163 is an annular groove surrounding the second shaft hole 161. The bearing shell 160 further includes a fifth groove 162. The fifth groove 162 is provided on the inner peripheral wall of the bearing shell 160, and the fifth groove 162 communicates with the gap 163.

[0112] The gap 163 and the fifth groove 162 between the two bearing shells 160 function as an oil sump, improving the wear resistance between the eccentric crankshaft 140 and the bearing shell 160, reducing the frictional noise of the compressor, and improving the performance of the compressor.

[0113] In some embodiments, referring to Figure 7 , the fifth groove 162 spirally extends along the circumferential direction of the bearing shell 160, increasing the extension length of the fifth groove 162 and the oil storage capacity of the fifth groove 162, which helps to improve the wear resistance between the eccentric crankshaft 140 and the bearing shell 160.

[0114] In some embodiments, referring to Figure 5 , the two fifth grooves 162 of the two bearing shells 160 are respectively the fifth groove 162A and the fifth groove 162B, and are located on the same spiral track. For example, the oil flows through the second shaft hole 161 from bottom to top. The oil first passes through the lower fifth groove 162A, then enters the gap 163 between the two bearing shells 160, and then flows into the upper fifth groove 162B. The fifth groove 162A and the fifth groove 162B are on the same thread track, facilitating oil supply and ensuring that the parts of the eccentric crankshaft 140 in contact with the bearing 150 can be effectively lubricated, reducing friction.

[0115] [Eccentric crankshaft]

[0116] In some disclosed compressors, the eccentric crankshaft 140 is usually a casting, with a low elastic modulus and significant wear between the bearing 150 and the eccentric crankshaft 140. The machining process of the bearing 150 includes casting, rough machining, finish machining, phosphating, brushing, etc. The machining process is complex and costly. Machining processes such as casting and phosphating consume fossil fuels and pollute the environment.

[0117] To solve this technical problem, in some embodiments, referring to Figures 16 to 18 , the eccentric crankshaft 140 includes a main shaft section 141, and the eccentric crankshaft 140 further includes a third shaft hole 1411. The third shaft hole 1411 is formed inside the main shaft section 141. The eccentric crankshaft 140 further includes a vane 143. The vane 143 is disposed in the third shaft hole 1411. The eccentric crankshaft 140 further includes a shaft plug 145; the eccentric crankshaft 140 further includes a bushing 144. The shaft plug 145 is disposed at one end of the third shaft hole 1411, and the bushing 144 is disposed at the opposite end of the third shaft hole 1411.

[0118] The main shaft section 141 is made of a metal tube, such as a steel tube, and the third shaft hole 1411 is formed inside the metal tube.

[0119] The eccentric crankshaft 140 further includes a plurality of oil holes 1412. A plurality of oil holes 1412 are provided on the main shaft section 141 to supply lubricating oil to each friction pair mounted on the eccentric crankshaft 140.

[0120] The eccentric crankshaft 140 includes an eccentric shaft section 142, and the eccentric shaft section 142 is fixedly sleeved on the main shaft section 141. The eccentric crankshaft 140 is made of a sheet metal stamping part. The eccentric crankshaft 140 is fixedly welded to the main shaft section 141.

[0121] The eccentric crankshaft 140 in some embodiments of the present disclosure has a low cost, and the machining process is simplified, including stamping, finish machining, and welding. The machining process can reduce environmental pollution.

[0122] The eccentric crankshaft 140 in some embodiments of the present disclosure uses a sheet metal stamping part and a metal pipe, the material is steel, and the elastic modulus is large, which reduces the friction between the bearing 150 and the eccentric crankshaft 140.

[0123] In some embodiments, referring to Figure 16 , the eccentric crankshaft 140 further includes a third groove 1426. The third groove 1426 is provided on the outer peripheral wall of the eccentric shaft section 142, and the third groove 1426 surrounds the eccentric shaft section 142. The eccentric crankshaft 140 further includes a first channel 1428. The first channel 1428 is provided inside the eccentric shaft section 142, and the first channel 1428 is configured to supply oil to the third groove 1426.

[0124] The third groove 1426 serves as an oil groove, adding a channel for the flow of lubricating oil, ensuring a good oil film state between the eccentric crankshaft 140 and the piston, and avoiding the "jamming" phenomenon of the compressor caused by insufficient oil supply.

[0125] In some embodiments, referring to Figure 19 and Figure 20 , the eccentric shaft section 142 includes two sub-eccentric shaft sections 1421. The two sub-eccentric shaft sections 1421 are connected and symmetrically arranged on both sides in the height direction of the third groove 1426.

[0126] Referring to Figure 20 , the sub-eccentric shaft section 1421 includes a first wall 1422; the sub-eccentric shaft section 1421 further includes a second wall 1423. The second wall 1423 extends from the circumferential edge of the first wall 1422 in a direction away from the first wall 1422. The two first walls 1422 on the two sub-eccentric shaft sections 1421 are connected, for example, by welding, to achieve the fixed connection of the two sub-eccentric shaft sections 1421.

[0127] The sub-eccentric shaft section 1421 is composed of the first wall 1422 and the second wall 1423, with a non-solid structure, less material used, and low cost.

[0128] The sub-eccentric shaft section 1421 further includes a weight-reducing hole 1429. The sub-eccentric shaft section 1421 further includes a second opening 1424. The second opening 1424 is provided on the first wall 1422, and the two second openings 1424 on the two sub-eccentric shaft sections 1421 are communicated to form the weight-reducing hole 1429.

[0129] The sub-eccentric shaft section 1421 further includes a fourth groove 1427. The fourth groove 1427 is provided on the first wall 1422, and the two fourth grooves 1427 on the two sub-eccentric shaft sections 1421 are butt-connected and communicated to form a first channel 1428.

[0130] The sub-eccentric shaft section 1421 further includes a transition surface 1430. The position where the first wall 1422 and the second wall 1423 meet is the transition surface 1430. For example, the transition surface 1430 is arc-shaped or the like. When the two sub-eccentric shaft sections 1421 are fixedly connected, the two transition surfaces 1430 enclose the third groove 1426 surrounding the eccentric shaft section 142.

[0131] The sub-eccentric shaft section 1421 further includes a third opening 1425. The third opening 1425 is provided on the first wall 1422, and the two third openings 1425 on the two sub-eccentric shaft sections 1421 are directly opposite and communicated, and the main shaft section 141 passes through the two third openings 1425.

[0132] [Multi-connected air conditioner]

[0133] In some embodiments, referring to Figure 21, the multi-connected air conditioner includes an outdoor unit 610 and a plurality of indoor units 620. The outdoor unit 610 is connected to the plurality of indoor units 620. A compressor and a second gas-liquid separator 520 are provided in the indoor unit 620. The compressor is independent of the second gas-liquid separator 520. At this time, the compressor does not need to be configured with a first gas-liquid separator 510, reducing the size of the compressor and lowering the cost on the premise of ensuring the refrigerant gas-liquid separation effect.

[0134] In some embodiments, referring to Figures 22 to 24 , the compressor is a twin-cylinder rotary compressor. The compression mechanism 120 includes two cylinders, namely a first cylinder 1221 and a second cylinder 1222.

[0135] The compressor includes a suction pipeline 200, and the suction pipeline 200 is configured to supply the gaseous refrigerant of the second gas-liquid separator 520 into the compression chamber of the compression mechanism 120.

[0136] The second gas-liquid separator 520 includes a second outlet pipe 521. The suction pipeline 200 includes a first suction pipe 210, and the first suction pipe 210 is configured to communicate with the second outlet pipe 521 of the second gas-liquid separator 520.

[0137] The suction pipeline 200 includes two second suction pipes 220, and the two second suction pipes 220 are configured to communicate with the two cylinders respectively.

[0138] The suction pipeline 200 includes a tee 230. Referring to Figure 25 , the tee 230 includes three connection ports, namely a first connection port 231 and two second connection ports 232. The first connection port 231 communicates with the second connection ports 232, and the two second connection ports 232 are arranged side by side. When installing the tee 230, the opening of the first connection port 231 faces upward to be connected to the first suction pipe 210, and the openings of the second connection ports 232 face downward to be connected to the second suction pipes 220, and the two second connection ports 232 communicate with the two second suction pipes 220 respectively.

[0139] The first connection port 231 of the tee 230 faces upward and the second connection ports 232 face downward. The gaseous refrigerant flowing out of the second gas-liquid separator 520 flows through the first suction pipe 210 and the two second suction pipes 220 from top to bottom, and is distributed into the two cylinders through the two second suction pipes 220, improving the distribution uniformity of the refrigerant.

[0140] In some embodiments, the tee 230 is arranged to extend along the height direction of the first housing 110, and the range of the angle difference between the center line of the tee 230 and the center line of the first housing 110 is [0°, 10°], which helps to improve the distribution uniformity of the refrigerant.

[0141] In some embodiments, the two second connection ports 232 are symmetrically arranged with respect to the axis of the first connection port 231, which helps to improve the uniformity of refrigerant distribution.

[0142] In some embodiments, the inner diameter of the second suction pipe 220 is D5, and the range of the difference between the inner diameters of the two second suction pipes 220 is [0, 0.5D5], which helps to improve the uniformity of refrigerant distribution.

[0143] In some embodiments, the inner diameter of the second suction pipe 220 is D5, and the inner diameter of the suction port of the cylinder is D6, where 0.5 ≤ D5 / D6 ≤ 2, which helps to improve the uniformity of refrigerant distribution.

[0144] In some embodiments, the inner diameter of the second suction pipe 220 is D5, and the inner diameter of the first suction pipe 210 is D7, where 1 ≤ D7 / D5 ≤ 5, which helps to improve the uniformity of refrigerant distribution.

[0145] In some embodiments, the tee 230, the first suction pipe 210, and the second suction pipe 220 are fixed by welding. The depth of insertion of the first suction pipe 210 into the first connection port 231 and the depth of insertion of the second suction pipe 220 into the second connection port 232 are d, where 50 mm ≥ d ≥ 10 mm, which helps to improve the structural reliability.

[0146] In some embodiments, referring to Figure 23 , the compressor includes a vibration isolation part 400. The vibration isolation part 400 is provided with mounting holes, and the first suction pipe 210 passes through the mounting holes. The vibration isolation part 400 is, for example, a rubber pad.

[0147] Referring to Figure 23 and Figure 26 , the compressor includes a fixing part 300. The fixing part 300 is fixedly connected to the first housing 110, for example, by welding. The fixing part 300 forms a receiving space 330, and the vibration isolation part 400 is located within the receiving space 330.

[0148] On the one hand, the vibration isolation part 400 functions to isolate vibration and reduce noise; on the other hand, the fixing part 300 improves the stability of the first suction pipe 210.

[0149] In some embodiments, referring to Figure 26 , the fixing part 300 includes a first sub-fixing part 310; the fixing part 300 further includes a second sub-fixing part 320.

[0150] The first sub-fixing portion 310 includes a connecting portion 311, and the first sub-fixing portion 310 also includes a first extending portion 312. One end of the connecting portion 311 is provided with the first extending portion 312. The first sub-fixing portion 310 also includes a second extending portion 313. The other opposite end of the connecting portion 311 is provided with the second extending portion 313. The connecting portion 311, the first extending portion 312 and the second extending portion 313 are an integral structure. The connecting portion 311 is fixedly connected to the first housing 110, for example, by welding.

[0151] The connecting portion 311 is arc-shaped to fit and be fixedly connected with the outer contour of the first housing 110. The first extension portion 312 extends toward the side of the connecting portion 311 away from the first housing 110. The second extension portion 313 includes two sub-extension portions, namely a first sub-extension portion 3131 and a second sub-extension portion 3132. The first sub-extension portion 3131 extends toward the side of the connecting portion 311 away from the housing, and the second sub-extension portion 3132 extends from the first sub-extension portion 3131 toward the side away from the first extension portion 312. For example, the second extension portion 313 is L-shaped.

[0152] One end of the second sub-fixing portion 320 is connected to the first extending portion 312 , and the other opposite end of the second sub-fixing portion 320 is connected to the second extending portion 313 , so as to limit the vibration isolation portion 400 in the accommodation space 330 .

[0153] For example, the first sub-fixing portion 310 further includes an opening 3121, the first extension portion 312 is provided with the opening 3121, the fixing portion 300 further includes a clamping portion 321, one end of the second sub-fixing portion 320 is provided with a clamping portion 321, such as a hook, and the clamping portion 321 is clamped with the opening 3121. The other end of the second sub-fixing portion 320 is fixed to the second sub-extension portion 3132 by a bolt.

[0154] The second sub-fixing portion 320 includes a second connecting segment 322 . The second connecting segment 322 is arc-shaped and matches the contour of the vibration isolation portion 400 , thereby improving the limiting effect on the vibration isolation portion 400 .

[0155] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0156] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A compressor, characterized in that, Comprising: A housing, within which an installation cavity is formed; A compression mechanism, disposed within the installation cavity, the compression mechanism being configured to compress a refrigerant, the compression mechanism including two cylinders; An intake pipe, configured to supply gaseous refrigerant from an external gas-liquid separator into a compression cavity of the compression mechanism, the intake pipe including: A first intake pipe, configured to communicate with an outlet pipe of the external gas-liquid separator; Two second intake pipes, the two second intake pipes being configured to respectively communicate with the two cylinders; A tee, including a first connection port and two second connection ports, the first connection port being in communication with the second connection ports, the two second connection ports being arranged side by side, an opening of the first connection port facing upward for connection with the first intake pipe, an opening of the second connection port facing downward for connection with the second intake pipe, the two second connection ports respectively communicating with the two second intake pipes.

2. The compressor according to claim 1, wherein The tee extends along a height direction of the housing, and a range of an angle difference between a center line of the tee and a center line of the housing is [0°, 10°].

3. The compressor according to claim 1, wherein The two second connection ports are symmetrically arranged with respect to an axis of the first connection port.

4. The compressor according to claim 1, wherein An inner diameter of the second intake pipe is D5, and a range of a difference between inner diameters of the two second intake pipes is [0, 0.5D5].

5. The compressor according to claim 1, wherein An inner diameter of the second intake pipe is D5, and an inner diameter of an intake port of the cylinder is D6, 0.5 ≤ D5 / D6 ≤ 2.

6. The compressor according to claim 1, wherein An inner diameter of the second intake pipe is D5, and an inner diameter of the first intake pipe is D7, 1 ≤ D7 / D5 ≤ 5.

7. The compressor according to claim 1, wherein A depth at which the first intake pipe is inserted into the first connection port and a depth at which the second intake pipe is inserted into the second connection port are d, 50 mm ≥ d ≥ 10 mm.

8. The compressor according to any one of claims 1 to 7, wherein The compressor includes a vibration isolation portion, an installation hole is provided on the vibration isolation portion, and the first intake pipe passes through the installation hole; The compressor includes a fixing portion, the fixing portion is fixedly connected to the housing, the fixing portion forms a receiving space, and the vibration isolation portion is located within the receiving space.

9. The compressor according to claim 8, wherein The fixing portion includes a first sub-fixing portion and a second sub-fixing portion; The first sub-fixing portion includes a connecting portion, a first extension portion is provided at one end of the connecting portion, a second extension portion is provided at the other opposite end of the connecting portion, and the connecting portion is fixedly connected to the housing; One end of the second sub-fixing portion is connected to the first extension portion, and the other opposite end of the second sub-fixing portion is connected to the second extension portion to limit the vibration isolation portion within the receiving space.

10. A multi-connected air conditioner, comprising an outdoor unit and a plurality of indoor units, the outdoor unit being connected to the plurality of indoor units, the outdoor unit including a compressor and a gas-liquid separator, characterized in that, The compressor is the compressor according to any one of claims 1 to 9, and the first suction pipe is communicated with the air outlet pipe of the gas-liquid separator.

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