CN218934726U - Compressor and air conditioner - Google Patents

Abstract

The utility model discloses a compressor and an air conditioner, wherein the compressor comprises a shell, a compression mechanism and an auxiliary bearing; the top of the shell is provided with an exhaust port; the top of eccentric bent axle is located to auxiliary bearing, and auxiliary bearing's top and the roof fixed connection of casing are equipped with first cavity and the second cavity of arranging from top to bottom in the auxiliary bearing, and in first cavity was located at eccentric bent axle's top, be equipped with a plurality of through-holes that are used for circulating refrigerant on the perisporium of enclosing into the second cavity, second cavity and gas vent intercommunication. The top swing amplitude of the eccentric crankshaft is reduced through the auxiliary bearing, the abrasion failure risk of the compressor is reduced, and the operation reliability is improved.

Description

Compressor and air conditioner

Technical Field

The utility model relates to the technical field of air conditioners, in particular to a compressor and an air conditioner.

Background

The air conditioner performs a cooling and heating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigerating and heating cycle includes a series of processes involving compression, condensation, expansion and evaporation, and refrigerating or heating an indoor space.

The low-temperature low-pressure refrigerant enters the compressor, the compressor compresses the refrigerant gas into a high-temperature high-pressure state, and the compressed refrigerant gas is discharged. 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.

The rolling rotor compressor is widely applied to air conditioners nowadays, and the working principle of the existing rolling rotor compressor is as follows: the motor stator generates magnetic pulling force after being electrified, the motor rotor rotates under the action of the magnetic pulling force of the stator and drives the eccentric crankshaft of the compression mechanism to rotate together, the eccentric crankshaft rotates to drive the piston sleeved on the eccentric part of the eccentric crankshaft to do eccentric circular motion in the cylinder, the sliding vane is arranged in the sliding vane groove of the cylinder, the piston is always propped against the action of the compression spring in the spring hole to do reciprocating motion in the sliding vane groove, the sliding vane and the piston divide the cylinder into a high-pressure cavity and a low-pressure cavity, and the eccentric crankshaft drives the piston to rotate for one circle to suck air from the low-pressure cavity and exhaust air from the high-pressure cavity to complete one-time exhaust, so that the compression of the compressor to air is realized.

In the prior art, because of the abrasion problem of the crankshaft caused by the deflection of the eccentric crankshaft, an auxiliary bearing needs to be added to disperse the load on the eccentric crankshaft, the auxiliary bearing needs to be fixed in an auxiliary way by a bracket, and the fixing structure between the auxiliary bearing and the bracket is complex and inconvenient to assemble.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems pointed out in the background art, the utility model provides the compressor and the air conditioner, wherein the auxiliary bearing is arranged at the top of the eccentric crankshaft and fixedly connected with the upper shell, so that the assembly is convenient, the structure is reliable, the swing amplitude of the top of the eccentric crankshaft is effectively reduced, the abrasion failure risk of the compressor is reduced, and the operation reliability is improved.

In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme:

in some embodiments of the present application, there is provided a compressor including:

the top of the shell is provided with an exhaust port;

the compression mechanism is arranged in the inner cavity of the shell and used for compressing the refrigerant, and comprises an eccentric crankshaft;

the auxiliary bearing is arranged at the top of the eccentric crankshaft, the top of the auxiliary bearing is fixedly connected with the top wall of the shell, a first cavity and a second cavity which are arranged up and down are arranged in the auxiliary bearing, the top of the eccentric crankshaft is arranged in the first cavity, a plurality of through holes for circulating refrigerant are formed in the peripheral wall of the second cavity in a surrounding mode, and the second cavity is communicated with the exhaust port.

The auxiliary bearing is connected with the top of the eccentric crankshaft and the top wall of the shell at the same time, and the shell is fixed, so that radial deformation of the eccentric crankshaft is effectively prevented.

The top of casing sets up binding post, and auxiliary bearing is whole to be cylindrical structure roughly, extends along the axial of eccentric bent axle, can not influence the wiring between motor and the binding post at top.

The arrangement of a plurality of through holes does not influence the normal flow of the refrigerant, and the auxiliary bearing is equivalent to an oil blocking structure formed at the bottom of the exhaust pipe, so that the oil is effectively prevented from being discharged by the compressor, and the oil is left in the compressor.

The plurality of through holes are used for refrigerant circulation, and are also equivalent to the effect of the porous silencer, and the noise of the exhaust pipe is reduced at the lower right.

In some embodiments of the present application, the housing includes a main housing and an upper housing, where the upper housing is disposed at a top of the main housing to cover an opening at a top of the main housing, the upper housing is provided with the exhaust port, and an exhaust pipe is disposed in the exhaust port;

the top of the auxiliary bearing is fixedly connected with the inner wall of the upper shell, and the exhaust pipe extends into the second cavity.

In some embodiments of the present application, the auxiliary bearing is welded or integrally formed with the upper housing.

In some embodiments of the present application, a protruding portion is disposed on an inner peripheral wall of the auxiliary bearing, the protruding portion extends along the inner peripheral wall of the auxiliary bearing, the protruding portion divides an inner cavity of the auxiliary bearing into the first cavity and the second cavity, and a top end of the eccentric crankshaft abuts against the protruding portion.

In some embodiments of the present application, an oil through hole is formed in a portion of the eccentric crankshaft extending into the first cavity, and the oil through hole is used for conveying lubricating oil to a contact surface between the eccentric crankshaft and the auxiliary bearing.

In some embodiments of the present application, the outer diameter of the first cavity is smaller than the outer diameter of the second cavity, and the peripheral wall surrounding the first cavity and the peripheral wall surrounding the second cavity are in transition through an arc surface.

In some embodiments of the present application, the compressor further includes a motor, the motor includes a stator and a rotor disposed inside the stator, the rotor is connected with the eccentric crankshaft;

the top and the bottom of rotor are equipped with balancing part respectively, two balancing part slant opposite arrangement, balancing part is including deciding balancing piece, dynamic balance piece and elastic component, decide the balancing piece with rotor fixed connection is equipped with the spout in the balancing piece, the spout is by tank bottom to notch orientation be close to the central direction slope extension of rotor, the dynamic balance piece is located in the spout, the dynamic balance piece is followed spout slant up-and-down motion, the elastic component connect in between dynamic balance piece and the rotor.

In some embodiments of the present application, the fixed balance weight is a semi-arc structure, the fixed balance weight extends along the circumference of the rotor, two sliding grooves are arranged in the fixed balance weight, and the two sliding grooves are symmetrically arranged relative to the center of the fixed balance weight.

In some embodiments of the present application, the chute is open towards one side of the rotor, and the dynamic balance weight is installed in the chute through the opening.

The utility model also provides an air conditioner comprising the compressor.

Other features and advantages of the present utility model will become apparent upon review of the detailed description of the utility model in conjunction with the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic structural view of a compressor according to an embodiment;

fig. 2 is a schematic view of an internal structure of a compressor according to an embodiment;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic structural view of a motor rotor and a balance portion according to an embodiment;

FIG. 5 is a schematic view of the structure of FIG. 4, as viewed from the bottom upward;

fig. 6 is a schematic structural view of the balance portion according to the embodiment (omitting the elastic member);

fig. 7 is a top view of the balance portion (omitting the elastic member) according to the embodiment;

FIG. 8 is a cross-sectional view taken along B-B in FIG. 7;

FIG. 9 is a schematic view of an assembled structure between an auxiliary bearing, an eccentric crankshaft, and an upper housing according to an embodiment;

FIG. 10 is a schematic structural view of an auxiliary bearing according to an embodiment;

FIG. 11 is a schematic structural view of an eccentric crankshaft according to an embodiment;

FIG. 12 is an enlarged view of portion C of FIG. 11;

FIG. 13 is an enlarged view of portion D of FIG. 11;

reference numerals:

100-shell, 110-main shell, 120-upper shell;

200-motor, 210-stator, 220-rotor;

300-compression mechanism;

310-eccentric crankshafts, 311-main shaft sections, 312-upper eccentric shaft sections, 3121-upper through holes, 313-connecting shaft sections, 314-lower eccentric shaft sections, 3141-lower through holes, 315-auxiliary shaft sections, 316-top extensions, 317-bottom extensions, 318-grooves, 319-slots;

321-upper cylinder, 322-lower cylinder;

331-upper bearing, 332-lower bearing;

340-a middle separator;

351-upper muffler, 352-lower muffler;

361-upper piston, 362-lower piston;

400-exhaust pipe;

500-balancing parts, 510-fixed balancing blocks, 511-sliding grooves, 520-dynamic balancing blocks, 530-elastic pieces and 540-arc structures;

600-auxiliary bearing, 610-first cavity, 620-second cavity, 630-boss, 640-through hole, 650-arced face.

Description of the embodiments

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Air conditioner

The air conditioner in this application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and refrigerating or heating an indoor space.

The low-temperature low-pressure refrigerant enters the compressor, the compressor compresses the refrigerant gas into a high-temperature high-pressure state, and the compressed refrigerant gas is discharged. 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.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state 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 may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.

An outdoor unit of an air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, an indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner performs a heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner performs a cooling mode.

The mode of converting the indoor heat exchanger and the outdoor heat exchanger into a condenser or an evaporator generally adopts a four-way valve, and the arrangement of a conventional air conditioner is specifically referred to and will not be described herein.

The refrigeration working principle of the air conditioner is as follows: the compressor works to enable the interior of an indoor heat exchanger (in an indoor unit, an evaporator at the moment) to be in an ultralow pressure state, liquid refrigerant in the indoor heat exchanger is rapidly evaporated to absorb heat, air blown out by an indoor fan is cooled by an indoor heat exchanger coil and then changed into cold air to be blown into the indoor, the evaporated refrigerant is pressurized by the compressor and then condensed into liquid state in a high-pressure environment in an outdoor heat exchanger (in an outdoor unit, a condenser at the moment), heat is released, the heat is emitted to the atmosphere by the outdoor fan, and the refrigerating effect is achieved through circulation.

The heating working principle of the air conditioner is as follows: the gaseous refrigerant is pressurized by the compressor to become high-temperature high-pressure gas, and enters the indoor heat exchanger (a condenser at the moment), so that the gaseous refrigerant is condensed, liquefied and released heat to become liquid, and meanwhile, the indoor air is heated, so that the aim of improving the indoor temperature is fulfilled. The liquid refrigerant is decompressed by the throttling device, enters the outdoor heat exchanger (an evaporator at the moment), evaporates, gasifies and absorbs heat to become gas, and simultaneously absorbs heat of outdoor air (the outdoor air becomes colder) to become gaseous refrigerant, and enters the compressor again to start the next cycle.

Compressor

The compressor in this embodiment is a rolling rotor compressor, referring to fig. 1 to 3, which includes a housing 100, a closed inner cavity is formed in the housing 100, a motor 200 and a compression mechanism 300 are disposed in the inner cavity, the motor 200 provides power for the compressor mechanism 300, the compression mechanism 300 is used for compressing refrigerant, and the motor 200 is disposed above the compression mechanism 300.

The motor 200 includes a stator 210 and a rotor 220, the rotor 220 is disposed inside the stator 210, and the stator 210 is fixedly connected with the inner wall of the housing 100, so as to realize the fixed installation of the motor 200 in the inner cavity of the compressor.

Compression mechanism 300 includes an eccentric crankshaft 310, cylinders, pistons, and bearings.

The eccentric crankshaft 310 comprises a main shaft section, an eccentric shaft section and a secondary shaft section, wherein the main shaft section is fixedly connected with the rotor; a piston is arranged in the compression cavity of the air cylinder and sleeved on the eccentric shaft section; the bearing is fixedly connected with the air cylinder, a bearing exhaust hole is formed in the bearing, and the bearing exhaust hole is communicated with the compression cavity; the cylinder is provided with a sliding vane groove, a sliding vane is arranged in the sliding vane groove, the eccentric crankshaft drives the piston to do circumferential motion in the compression cavity, the sliding vane reciprocates along the sliding vane groove, the sliding vane is always abutted against the piston, and the sliding vane and the piston divide the compression cavity into a high-pressure cavity and a low-pressure cavity.

The working principle of the compressor is as follows: the stator 210 of the motor generates magnetic pulling force after being electrified, the rotor 220 of the motor rotates under the action of the magnetic pulling force of the stator and drives the eccentric crankshaft 310 to rotate together, the eccentric crankshaft 310 rotates to drive the piston sleeved on the eccentric shaft section of the eccentric crankshaft to do eccentric circular motion in the compression cavity of the cylinder, the sliding vane reciprocates in the sliding vane groove, the sliding vane and the piston divide the compression cavity of the cylinder into a high-pressure cavity and a low-pressure cavity, the eccentric crankshaft 310 drives the piston to rotate for one circle, then air is sucked from the low-pressure cavity to exhaust from the high-pressure cavity to complete one-time exhaust, the compression of the compressor to the air is realized, and the compressed air is exhausted through the bearing exhaust hole.

The exhaust pipe 400 is connected with the top of the housing 100, the intake pipe is connected with the circumferential side wall of the housing 100, and the intake pipe is communicated with the intake hole of the cylinder.

Fig. 2 shows a double-cylinder rolling rotor type compressor, and the compression mechanism 300 specifically includes an eccentric crankshaft 310, two cylinders (an upper cylinder 321 and a lower cylinder 322, respectively), two bearings (an upper bearing 331 and a lower bearing 332, respectively), two pistons (an upper piston 361 and a lower piston 362, respectively), and an intermediate partition 340.

Referring to fig. 11, the eccentric crankshaft 310 includes, in order from top to bottom, 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. Referring to fig. 3, an upper piston 361 capable of eccentric movement is arranged 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 performing eccentric motion is arranged 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 340 is sleeved on the connecting shaft section 313, and the middle partition 340 is positioned between the upper cylinder 321 and the lower cylinder 322; the upper bearing 331 is sleeved on the main shaft section 311 and is connected with the upper cylinder 321; the lower bearing 332 is sleeved on the auxiliary shaft section 315 and is simultaneously connected with the lower cylinder 322.

The upper eccentric shaft section 312 and the lower eccentric shaft section 314 protrude toward opposite sides of the eccentric crankshaft 310, specifically, the upper eccentric shaft section 312 and the lower eccentric shaft section 314 are disposed at 180 ° opposite angles, the upper piston 361 and the lower piston 362 simultaneously perform eccentric rotation, compressed air in the compression chamber of the upper cylinder 321 is discharged through the exhaust hole on the upper bearing 331, and compressed air in the compression chamber of the lower cylinder 322 is discharged through the exhaust hole on the lower bearing 332.

The upper bearing 331 is provided with an upper silencer 351, the upper silencer 351 covers the exhaust hole of the upper bearing 331, compressed air in the upper cylinder 321 is firstly discharged into a space surrounded by the upper silencer 351 and the upper bearing 331 through the exhaust hole of the upper bearing 331, and then is discharged into the inner cavity of the compressor through an upper silencer exhaust hole 3511.

The lower muffler 352 is arranged on the lower bearing 332, the lower muffler 352 covers the exhaust hole of the lower bearing 332, and the compressed air in the lower cylinder 322 is firstly discharged into the space surrounded by the lower muffler 352 and the lower bearing 332 through the exhaust hole on the lower bearing 332.

In contrast, the lower muffler 352 has no exhaust hole, and the walls of the upper bearing 331, the upper cylinder 321, the middle partition 340, the lower cylinder 322 and the lower bearing 332 are provided with a plurality of through holes penetrating up and down, and compressed air in the lower bearing 332 and the lower muffler 352 is discharged upwards into the space surrounded by the upper bearing 331 and the upper muffler 351 through the through holes and then discharged into the inner cavity of the compressor through the exhaust holes of the upper muffler.

Auxiliary bearing

In some embodiments of the present application, an auxiliary bearing 600 is disposed on the top of the eccentric crankshaft 310 (specifically, the main shaft section 311), where the auxiliary bearing 600 is used to prevent radial deformation of the eccentric crankshaft 310, reduce risk of collision between the rotor 220 and the stator 210 of the motor, reduce wear, and improve reliability.

Referring to fig. 9 and 10, a first cavity 610 and a second cavity 620 are disposed up and down in an inner cavity of the auxiliary bearing 600, and the first cavity 610 is located below the second cavity 620. The top of the eccentric crankshaft 310 is disposed in the first cavity 610, and the installation between the eccentric crankshaft 310 and the auxiliary bearing 600 is achieved. The top of the auxiliary bearing 600, i.e., the top wall of the second cavity 620 is fixedly connected with the top wall of the housing 100, so that the installation between the auxiliary bearing 600 and the housing 100 is realized.

The auxiliary bearing 600 is coupled to both the top of the eccentric crankshaft 310 and the top wall of the housing 100, and thus effectively prevents radial deformation of the eccentric crankshaft 310 since the housing 100 is stationary.

A connection terminal (not shown) is provided at the top of the housing 100, and referring to fig. 3, the auxiliary bearing 600 has a substantially cylindrical structure as a whole, and extends in the axial direction of the eccentric crankshaft 310, so that the wiring between the motor 200 and the top connection terminal is not affected.

A plurality of through holes 640 for circulating the refrigerant are formed in the peripheral wall surrounding the second cavity 620, an exhaust port is formed in the top of the housing 100, an exhaust pipe 400 is disposed in the exhaust port, and the second cavity 620 is communicated with the exhaust port.

Referring to fig. 3, the refrigerant compressed by the compression mechanism 300 flows into the space at the upper portion of the motor 200, flows into the second cavity 620 through the through hole 640, and is discharged through the discharge pipe 400.

The arrangement of the plurality of through holes 640 does not affect the normal flow of the refrigerant, and the auxiliary bearing 600 is equivalent to forming an oil blocking structure at the bottom of the discharge pipe 400, effectively preventing the compressor from spitting oil, and leaving the oil in the compressor.

The plurality of through holes 640 also function as a porous muffler for refrigerant circulation, and reduce noise of the exhaust pipe at the lower right.

In some embodiments of the present application, referring to fig. 1, the housing 100 includes a main housing 110 and an upper housing 120, the upper housing 120 is disposed on top of the main housing 110 to cover the top opening of the main housing 110, an exhaust port is disposed on the upper housing 120, and an exhaust pipe 400 is disposed in the exhaust port.

The top of the auxiliary bearing 600 is fixedly coupled to the inner wall of the upper housing 120, the discharge pipe 400 extends into the second cavity 620, and the refrigerant flowing into the second cavity 620 is directly discharged from the discharge pipe 400.

When the auxiliary bearing 600 is fixed to the upper case 120 during installation, the auxiliary bearing 600 and the eccentric crankshaft 310 are assembled to assist in positioning the upper case 120 during installation of the upper case 120 to the main case 110.

The top of the auxiliary bearing 600 is welded or integrally formed with the upper housing 120, and has a simple structure, and is convenient to process and assemble.

In some embodiments of the present application, referring to fig. 9, a protrusion 630 is disposed on an inner peripheral wall of the auxiliary bearing 600, the protrusion 630 extends along the inner peripheral wall of the auxiliary bearing 600, the protrusion 630 is an annular protrusion structure, the protrusion 630 partitions an inner cavity of the auxiliary bearing 600 into a first cavity 610 and a second cavity 620, and a top end of the eccentric crankshaft 310 abuts against the protrusion 630.

When the auxiliary bearing 600 is mounted on the eccentric crankshaft 310, the auxiliary bearing 600 is mounted in place until the top of the eccentric crankshaft 310 abuts against the boss 630, thereby realizing the up-down positioning of the upper housing 120 and the main housing 110, and the main housing 110 and the upper housing 120 are not assembled by interference.

In some embodiments of the present application, referring to fig. 10, the outer diameter of the first cavity 610 is smaller than the outer diameter of the second cavity 620, and the second cavity 620 has a larger volume, which is beneficial to smooth circulation of the refrigerant, so as to avoid accumulation of the refrigerant in the second cavity 620 due to too small volume and incapability of timely discharging the refrigerant.

The transition between the peripheral wall surrounding the first cavity 610 and the peripheral wall surrounding the second cavity 620 is made by an arcuate surface 650, the arcuate surface 650 helping to reduce the flow resistance of the refrigerant.

In some embodiments of the present application, an oil through hole (not shown) is provided at a portion of the eccentric crankshaft 310 extending into the first cavity 610, and the oil through hole is used to convey lubricating oil to a contact surface between the eccentric crankshaft 310 and the auxiliary bearing 600 to lubricate a friction surface.

Balance part

In some embodiments of the present application, referring to fig. 4 and 5, the top and bottom of the rotor 220 are provided with balancing parts 500, respectively, and the balancing parts 500 at the top and the balancing parts 500 at the bottom are diagonally opposite to each other for balancing the rotor 220.

The structure of the balancing part 500 refers to fig. 6 to 8, and includes a fixed balancing weight 510, a dynamic balancing weight 20 and an elastic member 530, wherein the fixed balancing weight 510 is fixedly connected with the rotor 220 by means of bolts, a chute 511 is arranged in the fixed balancing weight 510, the dynamic balancing weight 520 is arranged in the chute 511, the dynamic balancing weight 520 moves up and down in the chute 511, that is, the dynamic balancing weight 520 moves towards the direction approaching to and separating from the rotor 220, and the elastic member 530 is connected between the dynamic balancing weight 520 and the rotor 220.

The dynamic balance block 520 is equivalent to a self-adaptive adjusting block, and under different compressor rotation speeds, the dynamic balance block 520 can move up and down along the chute 511, so that the dynamic balance of the balance part 500 is realized, the dynamic balance performance of the compressor is improved, and the reliability optimization and the noise optimization of the whole machine are facilitated.

The top and bottom of the rotor 220 may be both provided with the balancing part 500 having the dynamic balance weight as shown in fig. 6 to 8, or may be provided only at the top or bottom, and the other balancing part may be a conventional fixed balance weight structure.

In some embodiments of the present application, the sliding chute 511 does not vertically extend up and down along the axial direction parallel to the eccentric crankshaft 310, but has a certain inclination angle, that is, the sliding chute 511 is an inclined chute, an included angle is formed between the extending direction from the bottom of the sliding chute 511 to the notch and the axial direction of the eccentric crankshaft 310, the sliding chute 511 extends obliquely from the bottom of the sliding chute to the notch toward the direction close to the center of the rotor 220, and the dynamic balance block 520 moves obliquely up and down along the sliding chute 511.

Taking the example that the balance part 500 shown in fig. 6 to 8 is provided at the bottom of the rotor 220, the chute 511 is inclined to extend from bottom to top toward the center of the rotor 220.

The chute 511 is obliquely arranged, so that the dynamic balance block 520 can obliquely move up and down, thereby not only changing the force balance, but also changing the moment balance, and both the force balance and the moment balance are taken into account, and the dynamic balance is obviously improved.

In some embodiments of the present application, the fixed balance weight 510 has an arc structure, so as to be fixed with the rotor 220, at least one sliding slot 511 is provided in the fixed balance weight 510, and a dynamic balance weight 520 is provided in each sliding slot 511.

By arranging a plurality of sliding grooves 511 in the fixed balance block 510, dynamic balance is adjusted simultaneously through a plurality of dynamic balance blocks 520, and the effect is better.

As a specific embodiment, the fixed balance weight 510 has a semi-arc structure, the fixed balance weight 510 extends along the circumferential direction of the rotor 220, two sliding grooves 511 are provided in the fixed balance weight 510, and the two sliding grooves 511 are symmetrically arranged with respect to the center of the fixed balance weight 510.

In some embodiments of the present application, the sliding chute 511 is open towards one side of the rotor, and the dynamic balance weight 520 is installed in the sliding chute 511 through the opening, so that the installation of the dynamic balance weight 520 is facilitated.

Meanwhile, the processing of the sliding groove 511 is facilitated, when the fixed balance block 510 is processed, the sliding groove 511 is directly formed in the fixed balance block 510, and the top side of the sliding groove 511 is open, so that the operations such as drawing of the fixed balance block 510 are not affected.

In some embodiments of the present application, the elastic member 530 is a spring, one end of the spring is connected to the dynamic balance weight 520 through an opening, the other end of the spring is connected to the rotor 220, and a plurality of springs may be provided.

The spring provides a restoring force for the dynamic balance block 520 on one hand, and also plays a limiting role in the installation of the dynamic balance block 520 in the chute 511 to prevent the dynamic balance block 520 from falling out of the chute 511 on the other hand.

In some embodiments of the present application, the end of the fixed weight 510 has an inclination angle in the up-down direction, and the drawing operation during the processing of the fixed weight 510 is utilized.

The end of the fixed balance weight 510 is of an arc structure, which can reduce the impact with the flow of the refrigerant and reduce the noise.

Eccentric crankshaft

In some embodiments of the present application, referring to fig. 11, an upwardly extending top extension 316 is provided at the top edge of the main shaft section 310, the top extension 316 being located on the opposite side of the upper eccentric shaft section 312, i.e. the top extension 316 is located on the same side as the lower eccentric shaft section 314.

The top extension 316 has three functions, namely, to balance most of the mass of the upper eccentric shaft section 312, to form a certain negative pressure at the top when the eccentric crankshaft 310 rotates at a high speed, so that oil pumping is facilitated, and to separate oil from refrigerant in the collision process with the top extension 316 when the oil pumped from the central oil hole of the eccentric crankshaft 310 is actually a mixture of oil and refrigerant, so that the oil discharge rate of the compressor is reduced.

The main shaft section 311 is provided with a groove 318, the groove 318 extends from the top of the main shaft section 311 towards the direction approaching the upper eccentric shaft section 312, and the groove 318 is located on the opposite side of the top extension 316, i.e. the groove 318 is located on the same side as the upper eccentric crankshaft section 312.

The provision of the recess 318 serves two purposes, one to reduce the mass on the same side of the upper eccentric shaft section 312, so that the mass of the top extension 316 can be reduced as much as possible, and the other to locate the rotor 220.

At the bottom edge of the auxiliary shaft section 315 there is a bottom extension 317 extending downwards, the bottom extension 317 being located on the opposite side of the lower eccentric shaft section 314, i.e. the bottom extension 317 is located on the same side as the upper eccentric shaft section 312.

The provision of the bottom extension 317 balances the mass of the lower eccentric shaft section 312.

The bottom extension 317 extends into the bottom sump of the compressor and, referring to fig. 12, the bottom extension 317 is provided with a plurality of spaced apart slots 319.

The grooves 319 are arranged, so that when the eccentric crankshaft 310 rotates, the bottom extension 317 extends into the bottom oil tank, and the grooves 319 can stir the oil in the oil tank into a vortex shape, so that the oil pumping of the eccentric crankshaft 310 is facilitated.

The eccentric crankshaft 310 in this embodiment balances the mass of the upper eccentric shaft section 312, the lower eccentric shaft section 314 by the top extension 316, the bottom extension 317, and the groove 318, achieving self-balancing of the eccentric crankshaft 310.

Fig. 2, 3 and 9 show an eccentric crankshaft of a general design, and in the case of the eccentric crankshaft design shown in fig. 11, the auxiliary bearing 600 and the main shaft section 311 can be assembled by means of annular grooves and projections, which are not shown.

In some embodiments of the present application, the upper eccentric shaft section 312 and the lower eccentric shaft section 314 are respectively provided with an opening extending along the axial direction of the eccentric crankshaft 310, and the opening penetrates or does not penetrate through the upper eccentric shaft section 312 and the lower eccentric shaft section 314.

The function of the openings is to reduce the mass of the upper eccentric shaft section 312 and the lower eccentric shaft section 314, further improving the self-balancing effect of the eccentric crankshaft 310.

When the openings are through holes, the openings penetrate the upper and lower oil grooves of the upper and lower eccentric shaft sections 312 and 314, so that lubrication is more sufficient.

In some embodiments of the present application, referring to fig. 11 and 13, a plurality of upper through holes 3121 are provided on the upper eccentric shaft section 312, and the plurality of upper through holes 3121 are arranged at intervals along the protruding portion of the upper eccentric shaft section 312; the lower eccentric shaft section 314 is provided with a plurality of lower through holes 3141, and the plurality of lower through holes 3141 are arranged at intervals along the protruding portion of the lower eccentric shaft section 314.

The plurality of upper through holes 3121 serve as upper and lower oil grooves penetrating the upper eccentric shaft section 312 while reducing the mass of the upper eccentric shaft section 312, so that lubrication is more sufficient.

Similarly, the plurality of lower through holes 3141 serve as upper and lower oil grooves penetrating the lower eccentric shaft section 314 while reducing the mass of the lower eccentric shaft section 314, thereby making lubrication more sufficient.

In some embodiments of the present application, the groove 318 is further used to locate the rotor 220, so a locating protrusion (not shown) for matching with the groove 318 is provided on the rotor 220, so that reliable assembly between the rotor 220 and the eccentric crankshaft 310 is achieved.

In some embodiments of the present application, top extension 316 is arcuate, top extension 316 extending along a top circumferential edge of spindle section 311; the bottom extension 317 is arcuate, with the bottom extension 317 extending along the bottom circumferential edge of the minor axis segment 315.

The top extension 316, the bottom extension 317 are integrally formed with the eccentric crankshaft 310 to facilitate machining.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A compressor, comprising:

the top of the shell is provided with an exhaust port;

the compression mechanism is arranged in the inner cavity of the shell and used for compressing the refrigerant, and comprises an eccentric crankshaft;

characterized in that the compressor further comprises:

the auxiliary bearing is arranged at the top of the eccentric crankshaft, the top of the auxiliary bearing is fixedly connected with the top wall of the shell, a first cavity and a second cavity which are arranged up and down are arranged in the auxiliary bearing, the top of the eccentric crankshaft is arranged in the first cavity, a plurality of through holes for circulating refrigerant are formed in the peripheral wall of the second cavity in a surrounding mode, and the second cavity is communicated with the exhaust port.

2. The compressor of claim 1, wherein,

the shell comprises a main shell and an upper shell, wherein the upper shell is arranged at the top of the main shell to cover the top opening of the main shell, the upper shell is provided with the exhaust port, and an exhaust pipe is arranged in the exhaust port;

the top of the auxiliary bearing is fixedly connected with the inner wall of the upper shell, and the exhaust pipe extends into the second cavity.

3. A compressor according to claim 2, wherein,

the auxiliary bearing is welded or integrally formed with the upper shell.

4. The compressor of claim 1, wherein,

the inner peripheral wall of the auxiliary bearing is provided with a protruding portion, the protruding portion extends along the inner peripheral wall of the auxiliary bearing, the protruding portion divides an inner cavity of the auxiliary bearing into a first cavity and a second cavity, and the top end of the eccentric crankshaft abuts against the protruding portion.

5. The compressor of claim 1, wherein,

and an oil through hole is formed in the part, extending into the first cavity, of the eccentric crankshaft, and the oil through hole is used for conveying lubricating oil to the contact surface between the eccentric crankshaft and the auxiliary bearing.

6. The compressor of claim 1, wherein,

the outer diameter of the first cavity is smaller than that of the second cavity, and the peripheral wall surrounding the first cavity and the peripheral wall surrounding the second cavity are in transition through an arc surface.

7. A compressor according to any one of claims 1 to 6, wherein,

the compressor also comprises a motor, wherein the motor comprises a stator and a rotor arranged in the stator, and the rotor is connected with the eccentric crankshaft;

the top and the bottom of rotor are equipped with balancing part respectively, two balancing part slant opposite arrangement, balancing part is including deciding balancing piece, dynamic balance piece and elastic component, decide the balancing piece with rotor fixed connection is equipped with the spout in the balancing piece, the spout is by tank bottom to notch orientation be close to the central direction slope extension of rotor, the dynamic balance piece is located in the spout, the dynamic balance piece is followed spout slant up-and-down motion, the elastic component connect in between dynamic balance piece and the rotor.

8. The compressor of claim 7, wherein,

the fixed balance weight is of a semi-arc structure, the fixed balance weight extends along the circumferential direction of the rotor, two sliding grooves are formed in the fixed balance weight, and the two sliding grooves are symmetrically arranged relative to the center of the fixed balance weight.

9. The compressor of claim 7, wherein,

the sliding groove is open towards one side of the rotor, and the dynamic balance block is arranged in the sliding groove through the opening.

10. An air conditioner comprising the compressor according to any one of claims 1 to 9.

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