A compressor and an air conditioner

Abstract

The present invention discloses a compressor and an air conditioner. A compression mechanism for compressing refrigerant is provided in the inner cavity of the compressor. The compression mechanism includes an eccentric crankshaft. An axial hole extending through the eccentric crankshaft is provided inside the eccentric crankshaft. A shaft plug assembly is provided in the axial hole, which includes a shaft plug and a float. The float is arranged on the bottom side of the shaft plug. A first exhaust hole is provided on the float. A second exhaust hole is provided on the bottom wall of the shaft plug. The first exhaust hole and the second exhaust hole are staggered from each other. The float moves upward under the buoyancy of the oil in the axial hole, and abuts against the bottom wall of the shaft plug to block the first exhaust hole and the second exhaust hole, so that the shaft plug effectively blocks the oil in the axial hole during the stable operation stage of the compressor, reduces the oil spitting rate of the compressor, and improves the operation reliability of the compressor. The float moves downward under its own weight, separates from the bottom wall of the shaft plug to open the first exhaust hole and the second exhaust hole, and realizes rapid exhaust of the axial hole through the shaft plug during the initial operation stage of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to a compressor and an air conditioner. Background Art

[0002] An 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 refrigeration and heating cycle includes a series of processes, involving compression, condensation, expansion, and evaporation, to cool or heat an indoor space.

[0003] A low-temperature and low-pressure refrigerant enters the compressor, and the compressor compresses it 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 refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0004] The scroll compressor is now widely used in air conditioners. The working principle of the existing scroll compressor is as follows: After the motor stator is energized, a magnetic pulling force is generated. The motor rotor makes a rotational motion under the action of the magnetic pulling force of the stator, and drives the eccentric crankshaft of the compression mechanism to make a rotational motion together. When the eccentric crankshaft rotates, it drives the piston sleeved on its eccentric part to make an eccentric circular motion in the cylinder. The sliding vane is installed in the sliding vane groove of the cylinder, and under the action of the compression spring in the spring hole, it always abuts against the piston, making it reciprocate in the sliding vane groove. The sliding vane and the piston divide the cylinder into a high-pressure chamber and a low-pressure chamber. When the eccentric crankshaft drives the piston to rotate one week, it sucks air from the low-pressure chamber and discharges air from the high-pressure chamber to complete one exhaust, thus realizing the compression of the gas by the compressor.

[0005] An oil supply vane is provided at the bottom of the shaft hole of the eccentric crankshaft, and a shaft plug is provided at the top of the shaft hole. An oil discharge hole communicating with the internal shaft hole is provided on the wall of the eccentric crankshaft. Under the action of the oil supply vane, the engine oil in the oil sump is driven to flow into the shaft hole and discharged from the side oil discharge hole to supply oil for lubrication to the friction pairs (including cylinders, bearings, etc.) sleeved on the eccentric crankshaft. The existing shaft plug is provided with an exhaust hole. In the initial operation stage of the compressor, the gas in the shaft hole is discharged through the exhaust hole at the top. However, in the stable operation stage of the compressor, the exhaust hole is not blocked, and a large amount of the engine oil in the shaft hole can be discharged from the exhaust hole, increasing the oil discharge rate of the compressor and reducing the operation reliability of the compressor.

[0006] 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

[0007] In view of the problems pointed out in the background art, a compressor and an air conditioner are provided. By improving the structure of the shaft plug in the shaft hole of the eccentric crankshaft, rapid exhaust is achieved at the shaft plug of the shaft hole during the initial operation stage of the compressor, and the shaft plug effectively seals the lubricating oil in the shaft hole during the stable operation stage, reducing the oil spitting rate of the compressor and improving the operation reliability of the compressor.

[0008] To achieve the above-mentioned invention object, the present invention adopts the following technical solutions:

[0009] In some embodiments of the present application, a compressor is provided. A compression mechanism for compressing refrigerant is provided in its inner cavity. The compression mechanism includes an eccentric crankshaft. An axially penetrating shaft hole is provided in the eccentric crankshaft. A shaft plug assembly is further included, which includes a shaft plug and a float. The shaft plug is arranged in the shaft hole. The float is arranged at the bottom side of the shaft plug. A first exhaust hole is provided on the float. A second exhaust hole is provided on the bottom wall of the shaft plug. The first exhaust hole and the second exhaust hole are staggered from each other.

[0010] The float moves upward under the buoyancy of the lubricating oil in the shaft hole and abuts against the bottom wall of the shaft plug to block the first exhaust hole and the second exhaust hole, realizing effective sealing of the lubricating oil in the shaft hole by the shaft plug during the stable operation stage of the compressor.

[0011] The float moves downward under its own weight and separates from the bottom wall of the shaft plug to open the first exhaust hole and the second exhaust hole, realizing rapid exhaust at the shaft plug of the shaft hole during the initial operation stage of the compressor.

[0012] In some embodiments of the present application, a plurality of spaced-apart mounting holes are provided on the bottom wall of the shaft plug. A connecting portion is provided at the top of the float. The connecting portion is inserted into the mounting hole and can move up and down along the mounting hole, realizing the up-and-down movable mounting of the float at the bottom of the shaft plug. And the assembly between the connecting portion and the mounting hole plays a guiding role in the up-and-down movement of the float.

[0013] In some embodiments of the present application, a conical portion is provided at the top of the connecting portion. The conical portion is located above the bottom wall of the shaft plug. The cross-section of the conical portion is circular. The cross-section diameter of the conical portion gradually decreases from bottom to top. The bottom diameter of the conical portion is larger than the diameter of the mounting hole. The setting of the conical portion facilitates the insertion of the connecting portion into the mounting hole, and it is not easy to fall off after installation due to the blocking of the conical portion, and the structure is reliable.

[0014] In some embodiments of the present application, the shaft hole includes a first shaft hole section and a second shaft hole section that are connected up and down.

[0015] An oil drain hole is provided on the wall surrounding a section of the shaft hole. An oil feeding vane is arranged in a section of the shaft hole. Due to the effect of the oil feeding vane, the engine oil in the oil sump moves upward along the shaft hole and is discharged through the oil drain hole to supply oil for lubricating the friction pair.

[0016] The shaft plug assembly is arranged at a position close to the upper part in the second section of the shaft hole. The outer peripheral wall of the shaft plug abuts against the inner peripheral wall of the second section of the shaft hole. The outer diameter of the float is smaller than the inner diameter of the second section of the shaft hole. An air vent gap is formed between the float and the inner wall of the second section of the shaft hole. During the exhaust stage, the gas in the shaft hole moves towards the shaft plug side through the exhaust gap and the first exhaust hole simultaneously and is finally discharged from the second exhaust hole, greatly improving the exhaust efficiency.

[0017] In some embodiments of the present application, a flexible sheet is provided at the bottom of the oil feeding vane. When the rotational speed increases, the flexible sheet deforms, making the oil feeding channel narrower and reducing the oil supply amount.

[0018] In some embodiments of the present application, a motor is further provided above the compression mechanism in the inner cavity of the compressor. The eccentric crankshaft is connected to the motor. An exhaust pipe is provided at the top of the compressor. A oil blocking assembly is arranged between the motor and the exhaust pipe. The oil blocking assembly forms a bent channel. The refrigerant gas compressed by the compression mechanism flows towards the exhaust pipe through the bent channel. The oil blocking assembly blocks the engine oil above the motor from flowing towards the exhaust pipe.

[0019] By arranging an oil blocking assembly between the exhaust pipe and the motor, the bent channel allows the gas to pass through, and at the same time can block the upward flow of liquid engine oil, achieving the effect of gas-liquid separation, reducing the oil spitting rate of the compressor, ensuring the amount of engine oil inside the compressor, and improving the reliability of the compressor.

[0020] In some embodiments of the present application, the oil blocking assembly includes a first oil blocking member and a second oil blocking member;

[0021] The first oil blocking member is located above the motor and has a certain distance from the motor. A first gap is formed between the first oil blocking member and the inner peripheral wall of the compressor housing. The first oil blocking member is provided with a first air vent opening opposite to the shaft hole;

[0022] The second oil blocking member is arranged on the inner peripheral wall of the housing and is located above the first oil blocking member. A second gap is formed between the first oil blocking member and the second oil blocking member. The second oil blocking member is provided with a second air vent opening. The first air vent opening is opposite to the second air vent opening;

[0023] The first gap and the second gap constitute the bent channel. The second air vent opening is communicated with the bent channel.

[0024] The refrigerant gas discharged from the cylinder undergoes multiple flow direction changes under the action of the first oil baffle and the second oil baffle. On the premise of allowing the gas to flow out, the multiple direction changes and the blocking effects of the first oil baffle and the second oil baffle block the liquid engine oil, achieving the effect of gas-liquid separation, preventing the liquid engine oil from being discharged with the refrigerant gas, and reducing the oil discharge rate.

[0025] In some embodiments of the present application, the first oil baffle includes an oil baffle plate and a connecting plate. The oil baffle plate is located above the connecting plate, and the oil baffle plate and the connecting plate are connected by a plurality of connecting columns arranged at intervals;

[0026] The connecting plate is arranged on the upper part of the rotor of the motor and is fixedly connected to the rotor of the motor;

[0027] There is the first gap between the oil baffle plate and the inner peripheral wall of the housing, there is the second gap between the oil baffle plate and the second oil baffle, and the first vent hole is provided on the oil baffle plate.

[0028] In some embodiments of the present application, the second oil baffle includes a transverse part and a vertical part. The transverse part extends along the transverse section of the inner cavity, the second vent hole is provided on the transverse part, the vertical part extends downward along the circumferential edge of the transverse part, the vertical part is fixedly connected to the inner peripheral wall of the housing, and there is the second gap between the transverse part and the oil baffle plate.

[0029] The present invention also provides an air conditioner, including the compressor as described above.

[0030] 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

[0031] 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 use in 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.

[0032] Figure 1 It is a schematic structural diagram of a compressor according to an embodiment;

[0033] Figure 2 It is a cross-sectional view of a compressor according to an embodiment;

[0034] Figure 3 It is a schematic assembly structural diagram of a compression mechanism, a motor, and an oil baffle assembly according to an embodiment;

[0035] Figure 4 Schematic structural diagram of an eccentric crankshaft according to an embodiment;

[0036] Figure 5 Schematic structural diagram of a shaft plug assembly viewed from the upper side according to an embodiment;

[0037] Figure 6 Schematic structural diagram of a shaft plug assembly viewed from the bottom side according to an embodiment;

[0038] Figure 7 Exploded view of a shaft plug assembly according to an embodiment;

[0039] Figure 8 Schematic structural diagram of an oiling vane according to an embodiment;

[0040] Figure 9 Schematic assembly structure diagram of an oil retaining assembly and an eccentric crankshaft according to an embodiment;

[0041] Figure 10 Schematic structural diagram of a first oil retaining member according to an embodiment;

[0042] Figure 11 Schematic structural diagram of a second oil retaining member according to an embodiment;

[0043] Figure 12 Schematic structural diagram of a compression mechanism according to an embodiment;

[0044] Figure 13 Schematic structural diagram of an upper muffler according to an embodiment;

[0045] Figure 14 Schematic structural diagram of an air duct according to an embodiment;

[0046] Figure 15 Schematic structural diagram of a housing according to an embodiment;

[0047] Figure 16 Schematic structural diagram of the installation structure of a return oil pipe according to an embodiment;

[0048] Figure 17 Schematic diagram of the installation principle of a return oil pipe according to an embodiment;

[0049] Reference numerals:

[0050] 100 - housing, 110 - groove;

[0051] 200 - motor, 210 - stator, 220 - rotor;

[0052] 300 - compression mechanism;

[0053] 310 - Eccentric crankshaft, 311 - Main shaft section, 312 - Upper eccentric shaft section, 313 - Connecting shaft section, 314 - Lower eccentric shaft section, 315 - Auxiliary shaft section, 316 - Shaft hole, 3161 - First shaft hole section, 3162 - Second shaft hole section, 317 - Exhaust hole;

[0054] 321 - Upper cylinder, 322 - Lower cylinder;

[0055] 331 - Upper bearing, 332 - Lower bearing;

[0056] 340 - Middle partition plate;

[0057] 351 - Upper muffler, 3511 - Upper exhaust hole, 3512 - Connecting flanging part, 3513 - Convex part, 3514 - Extension part, 352 - Lower muffler;

[0058] 361 - Upper piston, 362 - Lower piston;

[0059] 400 - Exhaust pipe;

[0060] 500 - Air duct, 510 - First air duct section, 520 - Second air duct section, 530 - Third air duct section, 540 - Fourth air duct section;

[0061] 600 - Oil baffle assembly, 610 - First oil baffle, 611 - Oil baffle plate, 6111 - First ventilation port, 612 - Connecting piece, 6121 - Perforation, 613 - Connecting column, 620 - Second oil baffle, 621 - Horizontal part, 622 - Vertical part, 623 - Second ventilation port, 630 - First gap, 640 - Second gap;

[0062] 700 - Oil return pipe;

[0063] 800 - Shaft plug assembly, 810 - Shaft plug, 811 - Second exhaust hole, 812 - Mounting hole, 813 - Extension fin, 814 - Bottom wall of the shaft plug, 820 - Float, 821 - First exhaust hole, 822 - Connecting part, 823 - Conical part;

[0064] 900 - Upper oil blade, 910 - Flexible sheet. Detailed implementation mode

[0065] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0066] 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 therefore should not be construed as a limitation to the present application.

[0067] 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 "a plurality of" is two or more.

[0068] 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 construed 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 a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application may be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0070] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0071] Air conditioner

[0072] In this application, the air conditioner performs the refrigeration and heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration and heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0073] The low-temperature and low-pressure refrigerant enters the compressor, and the compressor compresses it 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 refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0074] 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. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0075] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger. The indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0076] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner operates in the heating mode; when the indoor heat exchanger functions as an evaporator, the air conditioner operates in the refrigeration mode.

[0077] Among them, the way the indoor heat exchanger and the outdoor heat exchanger are converted to function as a condenser or an evaporator generally uses a four-way valve. For specific reference, please refer to the settings of conventional air conditioners and will not be elaborated here.

[0078] The refrigeration working principle of the air conditioner is as follows: When the compressor works, the indoor heat exchanger (in the indoor unit, which is an evaporator at this time) is in an ultra-low pressure state. The liquid refrigerant in the indoor heat exchanger quickly evaporates and absorbs heat. The air blown by the indoor fan passes through the indoor heat exchanger coil 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 state under the high-pressure environment in the outdoor heat exchanger (in the outdoor unit, which is a condenser at this time), releasing heat. Through the outdoor fan, the heat is dissipated into the atmosphere. In this way, the refrigeration effect is achieved through such a cycle.

[0079] 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 gas, and then enters the indoor heat exchanger (which is a condenser at this time). It condenses and liquefies, releasing heat and becoming a liquid. At the same time, it heats the indoor air, thus achieving the purpose of raising the indoor temperature. The liquid refrigerant is decompressed by the throttling device and enters the outdoor heat exchanger (which is an evaporator at this time). It evaporates and gasifies, absorbing heat and becoming a gas. At the same time, it absorbs the heat of the outdoor air (the outdoor air becomes colder) and becomes a gaseous refrigerant, then enters the compressor again to start the next cycle.

[0080] Compressor

[0081] The compressor in this embodiment is a rolling piston compressor. Refer to Figure 1 and Figure 2 , which includes a housing 100. A closed inner cavity is formed inside the housing 100. An electric motor 200 and a compression mechanism 300 are provided in the inner cavity. The electric motor 200 provides power for the compressor mechanism 300, and the compression mechanism 300 is used to compress the refrigerant. The electric motor 200 is arranged above the compression mechanism 300. Figure 1 Only the main housing of the compressor is shown in , and components such as the intake pipe are not shown.

[0082] The electric motor 200 includes a stator 210 and a rotor 220. The stator 210 is fixedly connected to the inner wall of the housing 100 to realize the fixed installation of the electric motor 200 in the inner cavity of the compressor.

[0083] The compression mechanism 300 includes an eccentric crankshaft 310, a cylinder, a piston, and a bearing.

[0084] Refer to Figure 2 and Figure 3 , the eccentric crankshaft 310 includes a main shaft section, an eccentric shaft section, and a secondary shaft section. The main shaft section is fixedly connected to the rotor 220; a piston is provided in the compression cavity of the cylinder, and the piston is sleeved on the eccentric shaft section; the bearing is fixedly connected to the cylinder, and a bearing exhaust hole is provided on the bearing, and the bearing exhaust hole communicates with the compression cavity; a sliding vane groove is provided on the cylinder, and a sliding vane is provided in the sliding vane groove. The eccentric crankshaft 310 drives the piston to make a circumferential movement in the compression cavity, and the sliding vane reciprocates along the sliding vane groove. The sliding vane always abuts against the piston, and the sliding vane and the piston divide the compression cavity into a high-pressure cavity and a low-pressure cavity.

[0085] The working principle of the compressor is as follows: After the stator 210 of the motor is powered on, it generates a magnetic pulling force. The rotor 220 of the motor makes a rotational motion under the action of the magnetic pulling force of the stator, and drives the eccentric crankshaft 310 to make a rotational motion together. When the eccentric crankshaft 310 rotates, it drives the piston sleeved on its eccentric shaft section to make an eccentric circular motion in the compression cavity of the cylinder. The sliding vane makes a reciprocating motion in the sliding vane groove. The sliding vane and the piston divide the compression cavity of the cylinder 320 into a high-pressure cavity and a low-pressure cavity. When the eccentric crankshaft 310 drives the piston to rotate one week, it sucks air from the low-pressure cavity and discharges air from the high-pressure cavity to complete one exhaust, realizing the compression of the gas by the compressor. The compressed gas is discharged through the bearing exhaust hole.

[0086] The housing 100 includes a top shell, a bottom shell, and a circumferential housing provided between the top shell and the bottom shell. The top shell, the bottom shell, and the circumferential housing enclose the inner cavity of the compressor.

[0087] The exhaust pipe 400 is connected to the top shell, and the intake pipe (not shown) is connected to the circumferential housing 130. The intake pipe is communicated with the intake hole of the cylinder.

[0088] Figure 2 The shown is a twin-cylinder rolling rotor compressor. The compression mechanism 300 specifically includes an eccentric crankshaft 310, two cylinders (the upper cylinder 321 and the lower cylinder 322 respectively), two bearings (the upper bearing 331 and the lower bearing 332 respectively), two pistons (the upper piston 361 and the lower piston 362 respectively), and a middle partition plate 340.

[0089] Combined Figure 9 , the eccentric crankshaft 310 successively includes a main shaft section 311, an upper eccentric shaft section 312, a connecting shaft section 313, a lower eccentric shaft section 314, and a sub-shaft section 315 from top to bottom. An upper piston 361 capable of making an eccentric motion is provided in the compression cavity of the upper cylinder 321, and the upper piston 361 is sleeved on the upper eccentric shaft section 312; a lower piston 362 capable of making an eccentric motion is provided in the compression cavity of the lower cylinder 322, and the lower piston 362 is sleeved on the lower eccentric shaft section 314; the middle partition plate 340 is sleeved on the connecting shaft section 313, and the middle partition plate 340 is located between the upper cylinder 321 and the lower cylinder 322; the upper bearing 331 is sleeved on the main shaft section 311 and is simultaneously connected to the upper cylinder 321; the lower bearing 332 is sleeved on the sub-shaft section 315 and is simultaneously connected to the lower cylinder 322.

[0090] The upper eccentric shaft section 312 and the lower eccentric shaft section 314 are arranged at a relative angle of 180°. The upper piston 361 and the lower piston 362 simultaneously make eccentric rotations. The compressed air in the compression cavity of the upper cylinder 321 is discharged through the exhaust hole on the upper bearing 331, and the compressed air in the compression cavity of the lower cylinder 322 is discharged through the exhaust hole on the lower bearing 332.

[0091] The upper bearing 331 is provided with an upper muffler 351. The upper muffler 351 covers the exhaust holes of the upper bearing 331. The compressed air in the upper cylinder 321 first discharges through the exhaust holes of the upper bearing 331 into the space surrounded by the upper muffler 351 and the upper bearing 331, and then discharges through the exhaust holes on the upper muffler 351 into the inner cavity of the compressor.

[0092] The lower bearing 332 is provided with a lower muffler 352. The lower muffler 352 covers the exhaust holes of the lower bearing 332. The compressed air in the lower cylinder 322 first discharges through the exhaust holes on the lower bearing 332 into the space surrounded by the lower muffler 352 and the lower bearing 332.

[0093] The difference is that there are no exhaust holes on the lower muffler 352. There are a plurality of through holes (not marked) penetrating up and down on the walls of the upper bearing 331, the upper cylinder 321, the middle partition plate 340, the lower cylinder 322 and the lower bearing 332. The compressed air in the lower bearing 332 and the lower muffler 352 discharges upward through the through holes into the space surrounded by the upper bearing 331 and the upper muffler 351, and then discharges through the exhaust holes on the upper muffler 351 into the inner cavity of the compressor.

[0094] The top of the housing 100 is provided with an exhaust pipe 400. The exhaust pipe 400 is located above the motor 200. The refrigerant gas compressed by the compression mechanism 300 finally discharges through the exhaust pipe.

[0095] Piston plug assembly, upper oil vane

[0096] Refer to Figure 4 , an axial hole 316 extending axially through is provided in the eccentric crankshaft 310. The axial hole 316 includes an axial hole section one 3161 and an axial hole section two 3162 that are vertically connected. The axial hole section one 3161 is located below the axial hole section two 3162. The internal axial holes of the upper eccentric shaft section 312, the connecting shaft section 313, the lower eccentric shaft section 314 and the auxiliary shaft section 315 correspond to the axial hole section one 3161, and the internal axial hole of the main shaft section 311 corresponds to the axial hole section two 3162.

[0097] An oil drain hole 317 is provided on the wall of the eccentric crankshaft 316. The axial hole section one 3161 is communicated with the oil drain hole 317. An upper oil vane 900 is provided in the axial hole section one 3161. Through the action of the upper oil vane 900, the engine oil in the oil sump moves upward along the axial hole 316 and discharges through the oil drain hole 317 to supply oil for lubrication of friction pairs (including the upper cylinder 321, the lower cylinder 322, the upper bearing 331, the lower bearing 332, etc.).

[0098] At the upper position of the second stage 3162 of the shaft hole, a shaft plug assembly 800 is provided. The shaft plug assembly 800 is provided with an exhaust hole. The shaft plug assembly 800 has two functions. One is that in the initial operation stage of the compressor, it is hoped that the gas in the shaft hole 316 can be quickly discharged through the shaft plug assembly 800; the other is that in the stable operation stage of the compressor, it is hoped that the shaft plug assembly 800 blocks the shaft hole 316 to prevent the oil in the shaft hole 316 from being discharged.

[0099] However, for the ordinary shaft plug used in the prior art, in the initial operation stage of the compressor, it can exhaust through the exhaust hole on the shaft plug. However, in the stable operation stage of the compressor, there is no blockage at the exhaust hole, resulting in a large amount of oil leakage at the shaft plug, increasing the oil spillage rate of the compressor and reducing the reliability of the compressor.

[0100] Therefore, the present application improves the structure of the shaft plug assembly 800 in order to solve the above problems. Specifically, referring to Figures 5 to 7 , the shaft plug assembly 800 includes a shaft plug 810 and a float 820. The shaft plug 810 is fixedly arranged in the shaft hole 316. The float 820 is arranged on the bottom side of the shaft plug 810. The float 820 can move up and down relative to the shaft plug 810. The float 820 is provided with a first exhaust hole 821, and the bottom wall of the shaft plug 810 is provided with a second exhaust hole 811. The first exhaust hole 821 and the second exhaust hole 811 are staggered from each other.

[0101] The density of the float 820 is less than the lowest density of the oil, so that the float 820 can move upward under the buoyancy of the oil in the shaft hole. When the float 820 moves upward and abuts against the bottom wall of the shaft plug 810, since the first exhaust hole 821 and the second exhaust hole 811 are staggered from each other, the blocking of the first exhaust hole 821 and the second exhaust hole 811 is realized. Actually, the float 820 blocks the bottom air inlet of the second exhaust hole 811, and the bottom wall of the shaft plug 810 blocks the top air outlet of the first exhaust hole 821.

[0102] In the stable operation stage of the compressor, the shaft hole 316 is filled with oil. The float 820 moves upward under the buoyancy of the oil, and the blocking of the first exhaust hole 821 and the second exhaust hole 811 can be realized, thereby preventing the oil in the shaft hole 316 from overflowing from the shaft plug assembly 800, effectively reducing the oil spillage rate of the compressor, ensuring the effective lubrication of each friction pair, and improving the operation reliability of the compressor.

[0103] During the initial operation stage of the compressor, the shaft hole 316 is not yet filled with lubricating oil and there is gas in the shaft hole 316. At this time, the float 820 moves downward under its own weight, separating from the bottom wall of the shaft plug 810. There is a ventilation gap between the two. Both the first exhaust hole 821 and the second exhaust hole 811 are opened and unobstructed. The gas in the shaft hole 316 is discharged through the first exhaust hole 821 and the second exhaust hole 811, realizing the rapid discharge of gas during the initial operation stage of the compressor.

[0104] In the present application, the shaft plug assembly 800 in the compressor fully utilizes the characteristics that the shaft hole 316 is not filled with lubricating oil during the initial operation stage and is filled with lubricating oil during the stable operation stage according to different operation stages of the compressor, specifically referring to the initial operation stage and the stable operation stage. The float 820 automatically rises to block the exhaust hole to avoid oil spillage, and the float 820 automatically descends to open the exhaust hole for rapid exhaust.

[0105] The overall structure of the shaft plug assembly 800 is compact and small in size, facilitating assembly into the shaft hole 316. Since there is no need to change the structure of the existing eccentric crankshaft 310, it has strong applicability.

[0106] In some embodiments of the present application, a plurality of spaced-apart mounting holes 812 are provided on the bottom wall of the shaft plug 810. A connecting portion 822 is provided at the top of the float 820. The connecting portion 822 is specifically a columnar structure. The connecting portion 822 is inserted into the mounting holes 812 and can move up and down along the mounting holes 812, realizing the vertically movable mounting of the float 820 at the bottom of the shaft plug 810. And the assembly between the connecting portion 822 and the mounting holes 812 plays a guiding role in the up and down movement of the float 820.

[0107] The outer diameter of the connecting portion 822 is smaller than the inner diameter of the mounting holes 812, reducing the friction when the two move relatively up and down, and reducing the resistance of the up and down movement of the float 820.

[0108] A conical portion 823 is provided at the top of the connecting portion 822. The conical portion 823 is located above the bottom wall of the shaft plug 810. The cross-section of the conical portion 823 is circular, and the cross-sectional diameter of the conical portion 823 gradually decreases from bottom to top, facilitating the conical portion 823 to be inserted into the mounting holes 812 from bottom to top to mount the float 820 onto the shaft plug 810.

[0109] The bottom diameter of the conical portion 823 is larger than the diameter of the mounting holes 812, making the float 820 not easily fall off after installation due to the blocking of the conical portion 823, and the structure is reliable.

[0110] In some embodiments of the present application, the float 820 has a cylindrical structure. The outer diameter of the float 820 is smaller than the inner diameter of the second section 3162 of the shaft hole. An air vent gap is formed between the float 820 and the inner wall of the second section 3162 of the shaft hole. During the exhaust stage, the gas in the shaft hole 316 moves towards the side of the shaft plug 810 through the exhaust gap and the first exhaust holes 821 simultaneously, and finally is discharged from the second exhaust hole 811, greatly improving the exhaust efficiency.

[0111] There are multiple first exhaust holes 821. The multiple first exhaust holes 821 are evenly spaced along the circumferential direction of the float 820, increasing the exhaust channels and improving the exhaust efficiency.

[0112] There is one second exhaust hole 811. The second exhaust hole 811 is directly opposite to the middle position of the area surrounded by the multiple first exhaust holes 821, facilitating the collection and discharge of the gas flowing from multiple directions.

[0113] In some embodiments of the present application, the shaft plug 810 includes a bottom wall 814 with an integral structure and multiple spaced-apart extending fins 813. The extending fins 813 extend upward from the bottom wall 814, and there is a certain gap between adjacent two extending fins 813. During installation, the multiple extending fins 813 are tightened and deformed inward, and then the entire shaft plug assembly 800 can be inserted into the shaft hole 316. At this time, the bottom edge of the shaft plug 810 is in close contact with the inner wall of the second section 3162 of the shaft hole. Then, the extending fins 813 are released, and the extending fins 813 return outward and are also in close contact with the inner wall of the second section 3162 of the shaft hole. By using the elastic deformation of the extending fins 813, on the one hand, it is convenient for the installation of the shaft plug assembly 800, improving the reliability after installation and making it not easy to fall off. On the other hand, it also improves the sealing fit with the second section 3162 of the shaft hole after installation. During exhaust, there is only one exhaust channel, i.e., the second exhaust hole 821, on the shaft plug 810. When exhaust is not required, the second exhaust hole 821 is blocked, realizing reliable sealing at the top of the shaft hole and preventing engine oil from overflowing from here.

[0114] In some embodiments of the present application, referring to Figure 8 , a flexible sheet 910 is provided at the bottom of the oiling vane 900. The flexible sheet 910 is made of flexible materials such as rubber. A notch (not labeled) is provided at the middle position of the flexible sheet 910, dividing the flexible sheet 910 into left and right two pieces. When the oiling vane 900 is stationary or rotates at a relatively low speed, the flexible sheet 910 and the bottom of the oiling vane 900 are in the same plane. As the rotation speed continuously increases, the two small flexible sheets will turn upward, making the oil supply channel narrower and reducing the oil supply amount.

[0115] The reason for setting the flexible sheet 910 is that at different rotational speeds (10 - 160 Hz), we hope that the fuel supply fluctuation is not large. However, in the prior art, as the rotational speed of the oil supply vane 900 varies, the amount of oil pumped in changes linearly, resulting in an excessive fuel supply. Therefore, the flexible sheet 910 is used to narrow the oil supply channel during high-speed operation to reduce the fuel supply.

[0116] The flexible sheet 910 undergoes slight deformation below 60 Hz and severe deformation at 160 Hz.

[0117] Oil baffle assembly

[0118] Continue to refer to Figure 2 , an oil baffle assembly 600 is provided between the exhaust pipe 400 and the motor 200. The oil baffle assembly 600 forms a bent channel. The refrigerant gas compressed by the compression mechanism 300 flows through the bent channel to the exhaust pipe 400. The oil baffle assembly 600 blocks the oil above the motor 200 from flowing to the exhaust pipe 400. Figure 2 The dotted arrows in

[0119] represent the gas flow path. If the oil baffle assembly 600 is not provided, the refrigerant gas compressed by the compression mechanism 300 flows directly upward and is directly discharged through the exhaust pipe 400, which will carry out a part of the refrigeration oil, resulting in a rapid reduction of the refrigeration oil inside the compressor, thus affecting the lubrication of the internal components of the compressor and reducing the reliability of the compressor.

[0120] By providing the oil baffle assembly 600 between the exhaust pipe 400 and the motor 200, the bent channel allows the gas to pass through, while blocking the upward flow of the liquid oil, achieving the effect of gas-liquid separation, reducing the oil discharge rate of the compressor, ensuring the amount of oil inside the compressor, and improving the reliability of the compressor.

[0121] In some embodiments of the present application, referring to Figure 9 , the oil baffle assembly 600 includes a first oil baffle 610 and a second oil baffle 620. Combining Figure 2 and Figure 3 , the first oil baffle 610 is located above the motor 200. There is a certain distance between the first oil baffle 610 and the motor 200. There is a first gap 630 between the first oil baffle 610 and the inner peripheral wall of the housing 100. The first oil baffle 610 is provided with a first ventilation port 6111.

[0122] The second oil baffle 620 is provided on the inner peripheral wall of the housing 100 and is located above the first oil baffle 610. There is a second gap 640 between the first oil baffle 610 and the second oil baffle 620. The second oil baffle 620 is provided with a second ventilation port 623.

[0123] The first gap 630 communicates with the second gap 640 to form the bent channel described above.

[0124] The first oil baffle 610 is specifically located above the rotor 220 of the motor. There is a ventilation hole (not labeled) that runs through the rotor 220 of the motor vertically. The refrigerant gas discharged from the cylinder flows upward through the ventilation hole in the rotor. Under the blocking effect of the first oil baffle 610, the flow direction changes. Blocked by the first oil baffle 610, it cannot continue to flow upward, but instead flows towards the inner peripheral wall of the housing 100. After flowing to the first gap 630, it then flows upward into the second gap 640, that is, it flows upward along the second gap 640 between the first oil baffle 610 and the second oil baffle 620 towards the middle second ventilation port 623, and then flows upward through the second ventilation port 623 into the exhaust pipe 400 and is finally discharged.

[0125] The refrigerant gas discharged from the cylinder undergoes multiple flow direction changes under the action of the first oil baffle 610 and the second oil baffle 620. On the premise of allowing the gas to flow through and be discharged, the multiple flow direction changes and the blocking effects of the first oil baffle 610 and the second oil baffle 620 block the liquid engine oil, achieving the effect of gas-liquid separation, preventing the liquid engine oil from being discharged with the refrigerant gas, and reducing the oil spitting rate.

[0126] The setting of the oil baffle assembly 600 makes full use of the space between the motor 200 at the top of the inner cavity and the exhaust pipe 400, and will not have any impact on the setting of the motor 200 and the compression mechanism 300 below.

[0127] In some embodiments of the present application, referring to Figure 5 , the first oil baffle 610 includes an oil baffle piece 611 and a connecting piece 612. Both the oil baffle piece 611 and the connecting piece 612 are in a disc-shaped structure. The oil baffle piece 611 is located above the connecting piece 612. The oil baffle piece 611 and the connecting piece 612 are connected by a plurality of connecting columns 613 arranged at intervals to form an integral body.

[0128] The connecting piece 612 is provided on the upper part of the rotor 220 of the motor and is fixedly connected to the rotor 220 of the motor. The connecting piece 612 also serves as the magnetic shielding piece above the rotor in the prior art.

[0129] There is a first gap 630 between the oil baffle piece 611 and the inner peripheral wall of the housing 100, and a second gap 640 between the oil baffle piece 611 and the second oil baffle 620.

[0130] From Figure 10 It can be seen that the connecting piece 612 and the oil baffle piece 611 are fixedly connected by four connecting columns 613. The area of the oil baffle piece 611 is larger than the area of the connecting piece 612. A perforation 6121 for the main shaft section 311 of the eccentric crankshaft to pass through is provided at the center position of the connecting piece 612. The plurality of connecting columns 613 are located on the outer peripheral side of the eccentric crankshaft 310.

[0131] A second ventilation port 6111 is provided at the central position of the oil baffle 611. The second ventilation port 6111 faces the shaft hole of the eccentric crankshaft 310, so as not to affect the exhaust of the shaft hole of the eccentric crankshaft 310. The first ventilation port 6111 faces the second ventilation port 612, and the exhaust passage is smooth, improving the exhaust efficiency.

[0132] In some embodiments of the present application, referring to Figure 11 , the second oil baffle 620 includes a transverse portion 621 and a vertical portion 622 of an integral structure. The transverse portion 621 extends along the transverse section of the inner cavity, that is, the transverse portion 621 extends in the horizontal direction. The transverse portion 621 is of a disc-shaped structure. A second ventilation port 623 is provided at the central position of the transverse portion 621. The vertical portion 622 extends downward along the circumferential edge of the transverse portion 621. The vertical portion 622 is fixedly connected to the inner peripheral wall of the housing 100 to realize the fixed installation of the second oil baffle 620. The projection of the transverse portion 621 and the oil baffle 611 on the horizontal plane has an intersection, and there is a certain distance between them in the up and down directions, forming a second gap 640.

[0133] In some embodiments of the present application, the second ventilation port 623 faces the intake end of the exhaust pipe 400, and the opening area of the second ventilation port 623 is larger than the intake opening area of the exhaust pipe 400, so as not to affect the exhaust efficiency.

[0134] upper muffler

[0135] The upper muffler 351 covers the exhaust hole on the upper bearing 331. Referring to Figure 13 , upper exhaust holes 3511 are provided on the circumferential wall of the upper muffler 351. The refrigerant gas flowing out of the exhaust hole of the upper bearing 331 flows to the side wall of the upper muffler 351 and flows into the inner cavity of the compressor through the upper exhaust holes 3511.

[0136] By arranging the upper exhaust holes 3511 laterally, the refrigerant gas discharged from the upper bearing 331 does not flow directly upward. The upper muffler 351 plays a blocking role. Blocked by the upper muffler 351, the flow path of the refrigerant gas turns and flows to the side upper exhaust holes 3511 of the upper muffler 351, and then is discharged from the upper exhaust holes 3511. During the process of the refrigerant gas flow turning, the entrained liquid oil is separated, reducing the oil content in the refrigerant gas discharged from the upper muffler 351 and reducing the oil spitting rate.

[0137] The shape of the upper exhaust holes 3511 is circular or rectangular or trapezoidal or triangular, etc.

[0138] In some embodiments of the present application, the upper muffler 351 includes a connecting flange portion 3512 and a convex portion 3513 that are integrally formed. The convex portion 3513 protrudes upward from the connecting flange portion 3512. The connecting flange portion 3512 is fixedly connected to the upper bearing 331 through a connecting member such as a bolt. A cavity is formed between the convex portion 3513 and the upper bearing 331. The exhaust hole on the upper bearing 331 and the upper exhaust hole 3511 are both communicated with the cavity. The upper exhaust hole 3511 is provided on the side wall of the convex portion 3513. The refrigerant gas discharged from the cylinder first flows into the cavity between the convex portion 3513 and the upper bearing 331, then flows horizontally to the upper exhaust hole 3511, and then is discharged.

[0139] The convex portion 3513 has a plurality of spaced-apart extending portions 3514. The connecting flange portion 3512 located between two adjacent extending portions 3514 is fixedly connected to the upper bearing 331 through a connecting member such as a bolt. The upper exhaust hole 3511 is provided on the side wall of the extending portion 3514. The arrangement of the extending portion 3514, on the one hand, enables the connecting flange portion 3512 to have a sufficiently large area for fixedly connecting with the upper bearing 331, improving the connection reliability. On the other hand, it can ensure that the volume of the inner cavity surrounded by the convex portion 3513 is sufficiently large, improving the silencing effect.

[0140] In some embodiments of the present application, there are a plurality of upper exhaust holes 3511, and at least two upper exhaust holes 3511 are arranged oppositely, increasing the flow path and flow efficiency of the refrigerant gas.

[0141] Lower muffler

[0142] As described above, by providing a plurality of through holes penetrating up and down on the walls of the upper bearing 331, the upper cylinder 321, the middle partition 340, the lower cylinder 322, and the lower bearing 332, the compressed air in the lower bearing 332 and the lower muffler 352 is discharged upward through the through holes into the space surrounded by the upper bearing 331 and the upper muffler 351, and then discharged into the inner cavity of the compressor through the exhaust holes on the upper muffler 351. After the compressor operates for a long time, the oil mixed in the refrigerant gas discharged from the lower cylinder 322 will deposit inside the lower muffler 352. When the oil accumulates too much, problems such as exhaust resistance, high oil spitting rate, and high noise will occur.

[0143] Therefore, in some embodiments of the present application, the above-mentioned through holes are cancelled. Referring to Figure 12 , a guide pipe 500 is connected to the bottom of the lower muffler 352, and the other end of the guide pipe 500 extends upward above the oil sump of the compressor, that is, specifically above the upper bearing 331.

[0144] Since the pressure in the lower muffler 352 is greater than the pressure above the upper bearing 331, the engine oil is discharged from the upper part under the drive of air pressure, achieving the effect of removing the accumulated oil in the lower muffler 352, and at the same time achieving the effects of reducing the exhaust resistance, lowering the oil spitting rate and noise.

[0145] In some embodiments of the present application, a sunken groove (not shown) is provided at the bottom of the lower muffler 352, and one end of the air guide pipe 500 communicates with the sunken groove, facilitating the collection and discharge of engine oil.

[0146] In some embodiments of the present application, the air outlet of the air guide pipe 500 faces the inner wall of the housing 100 of the compressor, and a guiding structure is provided at the outlet of the air guide pipe 500, so that the gas flowing out of the air guide pipe 500 flows obliquely downward, and the engine oil entrained in the gas discharged from the air guide pipe 500 hits the inner wall of the housing 100 and then flows downward along the inner wall back into the oil sump.

[0147] The guiding structure can have various implementation forms. For example, the air outlet end of the air guide pipe 500 is inclined downward at a certain angle, or a guiding inclined wall is provided on the inner wall of the air outlet.

[0148] In some embodiments of the present application, referring to Figure 14 , the air guide pipe 500 includes a first air guide pipe section 510, a second air guide pipe section 520, a third air guide pipe section 530, and a fourth air guide pipe section 540 connected in sequence. The first air guide pipe section 510 extends upward from the bottom of the lower muffler 352 to the inner cavity of the lower muffler 352, the second air guide pipe section 520 extends from the first air guide pipe section 510 to the circumferential outer side of the lower muffler 352, the third air guide pipe section 530 extends upward from the second air guide pipe section 520 above the oil sump of the compressor, that is, above the upper bearing 331, and the fourth air guide pipe section 540 extends from the third air guide pipe section 530 toward the inner wall of the housing 100 of the compressor. The air guide pipe 500 is generally located outside the compression mechanism 300, making full use of the space in this part.

[0149] Oil return structure

[0150] The present application provides two oil return structures.

[0151] First, in some embodiments, referring to Figure 15 , a plurality of grooves 110 are provided on the housing 100 at intervals along its circumference, the grooves 100 protrude toward the outside of the housing 100, and an oil return channel is formed between the stator 210 of the motor and the grooves 110, which helps to improve the oil return efficiency and the overall energy efficiency of the compressor.

[0152] Second, in some other embodiments, referring to Figure 16 and Figure 17An oil return pipe 700 is provided on the outside of the housing 100, one end of the oil return pipe 700 is connected to the upper space of the motor 200 and is located below the bent channel, and the other end of the oil return pipe 700 is connected to the oil pool in the inner cavity of the compressor. The upper and lower spaces of the motor 200 are connected through the external oil return pipe 700, so that the oil above the motor 200 can smoothly flow back to the oil pool, thereby ensuring the oil supply of the compressor pump body. Figure 17 The dotted line in represents the upper surface of the oil pool.

[0153] A plurality of oil return pipes 700 may be provided to improve the oil return efficiency.

[0154] 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.

[0155] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A compressor, in which a compression mechanism for compressing a refrigerant is provided in an inner cavity thereof. The compression mechanism includes an eccentric crankshaft, and an axial hole extending through the eccentric crankshaft along its axis. It is characterized in that, it further includes a shaft plug assembly, which includes a shaft plug and a float. The shaft plug is arranged in the axial hole, the float is arranged on the bottom side of the shaft plug, a first exhaust hole is provided on the float, and a second exhaust hole is provided on the bottom wall of the shaft plug. The first exhaust hole and the second exhaust hole are staggered from each other; the float moves upward under the buoyancy of the engine oil in the axial hole and abuts against the bottom wall of the shaft plug to block the first exhaust hole and the second exhaust hole; the float moves downward under its own weight and separates from the bottom wall of the shaft plug to open the first exhaust hole and the second exhaust hole; the density of the float is less than the density of the engine oil; the axial hole includes an upper axial hole section and a lower axial hole section that are connected up and down. The shaft plug assembly is arranged at a position closer to the upper part in the lower axial hole section. The outer peripheral wall of the shaft plug abuts against the inner peripheral wall of the lower axial hole section. The outer diameter of the float is smaller than the inner diameter of the lower axial hole section, and an air vent gap is formed between the float and the inner wall of the lower axial hole section; when the compressor is in a stable operation stage, the axial hole is filled with engine oil, and the float moves upward under the buoyancy of the engine oil to block the first exhaust hole and the second exhaust hole; when the compressor is in an initial operation stage, the axial hole is not filled with engine oil, there is gas in the axial hole, the float moves downward under the action of gravity, the float separates from the shaft plug, and there is an air vent gap between them. The first exhaust hole and the second exhaust hole are opened, and the gas in the axial hole is discharged through the first exhaust hole and the second exhaust hole.

2. The compressor according to claim 1, characterized in that, a plurality of spaced-apart mounting holes are provided on the bottom wall of the shaft plug, and a connecting portion is provided on the top of the float. The connecting portion is inserted into the mounting holes and can move up and down along the mounting holes.

3. The compressor according to claim 2, characterized in that, a conical portion is provided on the top of the connecting portion. The conical portion is located above the bottom wall of the shaft plug. The cross-section of the conical portion is circular, and the cross-section diameter of the conical portion gradually decreases from bottom to top. The bottom diameter of the conical portion is larger than the diameter of the mounting hole.

4. The compressor according to claim 1, characterized in that, an oil drain hole is provided on the wall enclosing the upper axial hole section, and an oil supply vane is provided in the upper axial hole section.

5. The compressor according to claim 4, characterized in that, a flexible sheet is provided at the bottom of the oil supply vane.

6. The compressor according to any one of claims 1 to 5, characterized in that, An electric motor is further provided above the compression mechanism in the inner cavity of the compressor. The eccentric crankshaft is connected to the electric motor. An exhaust pipe is provided at the top of the compressor. An oil baffle assembly is provided between the electric motor and the exhaust pipe. The oil baffle assembly forms a bent channel. The refrigerant gas compressed by the compression mechanism flows to the exhaust pipe through the bent channel. The oil baffle assembly blocks the oil above the electric motor from flowing to the exhaust pipe.

7. The compressor according to claim 6, wherein the oil baffle assembly includes a first oil baffle and a second oil baffle; the first oil baffle is located above the electric motor and has a certain distance from the electric motor. A first gap is formed between the first oil baffle and the inner peripheral wall of the compressor housing. A first vent hole is provided on the first oil baffle and is aligned with the shaft hole; the second oil baffle is provided on the inner peripheral wall of the housing and is located above the first oil baffle. A second gap is formed between the first oil baffle and the second oil baffle. A second vent hole is provided on the second oil baffle. The first vent hole is aligned with the second vent hole; the first gap and the second gap constitute the bent channel, and the second vent hole is communicated with the bent channel.

8. The compressor according to claim 7, wherein the first oil baffle includes an oil baffle plate and a connecting plate. The oil baffle plate is located above the connecting plate. The oil baffle plate and the connecting plate are connected by a plurality of connecting columns arranged at intervals; the connecting plate is provided on the upper part of the rotor of the electric motor and is fixedly connected to the rotor of the electric motor; a first gap is formed between the oil baffle plate and the inner peripheral wall of the housing, a second gap is formed between the oil baffle plate and the second oil baffle, and the first vent hole is provided on the oil baffle plate.

9. The compressor according to claim 8, wherein the second oil baffle includes a transverse portion and a vertical portion. The transverse portion extends along the transverse section of the inner cavity. The second vent hole is provided on the transverse portion. The vertical portion extends downward along the circumferential edge of the transverse portion. The vertical portion is fixedly connected to the inner peripheral wall of the housing. A second gap is formed between the transverse portion and the oil baffle plate.

10. An air conditioner, characterized in that, including the compressor according to any one of claims 1 to 9.

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