CN217462532U - Rotary compressor and air conditioner - Google Patents

Abstract

The utility model discloses a rotary compressor and an air conditioner, wherein a compression mechanism for compressing a refrigerant is arranged in an inner cavity of the compressor, and the compression mechanism comprises an eccentric crankshaft and an air cylinder; a piston is arranged in a compression cavity of the cylinder, a slip sheet capable of reciprocating is arranged on the cylinder, the piston is driven by the eccentric crankshaft to do circumferential motion in the compression cavity, and the slip sheet and the piston divide the compression cavity into a high-pressure cavity and a low-pressure cavity; the eccentric crankshaft is provided with a main shaft section, an auxiliary shaft section and an eccentric shaft section, a piston is sleeved on the eccentric shaft section, the ratio of the shaft diameters of the main shaft section and the auxiliary shaft section is D1, the shaft diameter of the eccentric shaft section is D2, the inner diameter of a compression cavity is Dcy1, the height of an air cylinder is Hcy, and the ratio of (D2/D1)/(Dcy1/Hcy) is not more than 0.5. The scheme performs relevance optimization design on the size of the cylinder and the size parameter of the eccentric crankshaft so as to improve the working efficiency of the compressor and reduce energy consumption.

Description

Rotary compressor and air conditioner

Technical Field

The utility model relates to a refrigeration plant technical field especially relates to a rotary compressor and 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 cooling and heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

The low-temperature and low-pressure refrigerant enters the compressor, the compressor compresses the refrigerant gas in a high-temperature and 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 rotary 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 pull force after being electrified, the motor rotor rotates under the action of the magnetic pull 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 sheet is installed in the sliding sheet groove of the cylinder, the piston is always propped against under the action of the compression spring in the spring hole to enable the piston to do reciprocating motion in the sliding sheet groove, the sliding sheet 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, so that the air is sucked from the low-pressure cavity and exhausted from the high-pressure cavity to finish one-time exhaust, and the compressor compresses the air.

The COP of the compressor is a ratio of a refrigerating capacity of the compressor to an input power (consumed electric power W), and the higher the COP value is, the higher the efficiency of the compressor is, and the lower the energy consumption is. The cylinder and the eccentric crankshaft are the main components of the compression mechanism, and the related parameters thereof directly influence the COP of the compressor. The prior art lacks an optimal design for the correlation between the cylinder and the eccentric crankshaft to achieve the best COP of the compressor.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

To the problem pointed out in the background art, the utility model provides a rotary compressor and air conditioner does relevance optimal design to cylinder size (including compression chamber internal diameter and jar height) and eccentric crankshaft's size (including main/countershaft footpath, eccentric diameter) parameter to improve the work efficiency of compressor, reduce the energy consumption.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

in some embodiments of the present application, there is provided a rotary compressor having a compression mechanism disposed in an inner cavity thereof for compressing a refrigerant, the compression mechanism including an eccentric crankshaft and a cylinder;

a piston is arranged in a compression cavity of the air cylinder, a sliding sheet capable of reciprocating is arranged on the air cylinder, the piston is driven by an eccentric crankshaft to do circumferential motion in the compression cavity, and the sliding sheet and the piston divide the compression cavity into a high-pressure cavity and a low-pressure cavity;

the eccentric crankshaft is provided with a main shaft section, an auxiliary shaft section and an eccentric shaft section, the piston is sleeved on the eccentric shaft section, the ratio of the shaft diameters of the main shaft section and the auxiliary shaft section is D1, the shaft diameter of the eccentric shaft section is D2, the inner diameter of the compression cavity is Dcy1, and the height of the cylinder is Hcy;

0.5≤(D2/D1)/(Dcy1/Hcy)≤1。

in some embodiments of the present application, the eccentric crankshaft sequentially includes, from top to bottom, the main shaft section, the upper eccentric shaft section, the connecting shaft section, the lower eccentric shaft section, and the auxiliary shaft section;

the main shaft section is connected with a motor of the compressor;

an upper piston is sleeved on the upper eccentric shaft section and is positioned in a compression cavity of the upper cylinder;

a lower piston is sleeved on the lower eccentric shaft section and is positioned in a compression cavity of the lower air cylinder;

a middle partition plate is sleeved on the connecting shaft section and located between the upper air cylinder and the lower air cylinder.

In some embodiments of the present application, the compression mechanism further includes an upper bearing and a lower bearing, the upper bearing is sleeved on the main shaft section and connected to the upper cylinder, and the lower bearing is sleeved on the auxiliary shaft section and connected to the lower cylinder;

the silencer is characterized by further comprising an upper silencer and a lower silencer, wherein the upper silencer is connected with the upper bearing, and the lower silencer is connected with the lower bearing.

In some embodiments of the present application, a plurality of upper first bolts penetrate the upper bearing and the upper cylinder from top to bottom;

a plurality of upper second bolts penetrate through the upper silencer, the upper bearing, the upper air cylinder, the middle partition plate and the lower air cylinder from top to bottom;

a plurality of lower first bolts penetrate through the lower bearing and the lower cylinder from bottom to top;

a plurality of lower second bolts penetrate through the lower silencer, the lower bearing, the lower cylinder, the middle partition plate and the upper cylinder from bottom to top;

the upper first bolt is opposite to the lower second bolt, and the upper second bolt is opposite to the lower first bolt.

In some embodiments of the present application, an oil pool for containing lubricating oil is disposed at the bottom of an inner cavity of the compressor, and a semiconductor wafer is disposed outside a shell of the compressor;

when the temperature in the oil pool is lower than a first set value, the semiconductor wafer heats the shell;

and when the temperature in the oil pool is higher than a second set value, the semiconductor wafer refrigerates the shell.

In some embodiments of the present application, the semiconductor fin extends in a circumferential direction of an outer circumferential wall of the case, and the semiconductor fin is disposed near the oil pool.

In some embodiments of this application, still be equipped with the motor in the inner chamber of compressor, the motor is located compressing mechanism's top, the motor is connected with capillary heat pipe, capillary heat pipe certainly the motor is worn through compressing mechanism downwardly extending to in the oil bath, be used for with the heat transfer of motor extremely in the oil bath.

In some embodiments of the present application, an exhaust pipe is disposed at a top of a shell of the compressor, and refrigerant gas compressed by the compression mechanism is discharged through the exhaust pipe;

the exhaust pipe is provided with a spiral pipe section, the spiral pipe section is close to the air inlet end of the exhaust pipe and located in the inner cavity of the compressor, and a plurality of oil leakage holes which are arranged at intervals are formed in the wall of the spiral pipe section.

In some embodiments of the present application, the oil leakage hole is formed in a bottom wall and/or a side wall of the spiral pipe section.

The utility model also provides an air conditioner, include as above rotary compressor.

Compared with the prior art, the utility model discloses an advantage is with positive effect:

in the air conditioner disclosed in the application, the internal diameter of the compressor cylinder (that is, the internal diameter of the compression cavity) is Dcy1, the height of the cylinder is Hcy, the eccentric amount of the eccentric crankshaft 310 is e, the ratio of the shaft diameters of the main shaft section and the auxiliary shaft section of the eccentric crankshaft is D1, the shaft diameter of the eccentric shaft section is D2, 0.5 is less than or equal to (D2/D1)/(Dcy1/Hcy) is less than or equal to 1, the compressor can obtain better COP in the interval, through making relevance optimization design on the internal diameter and height of the cylinder and the parameters of each shaft section of the eccentric crankshaft, the working efficiency of the compressor can be improved, and the energy consumption is reduced.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

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

fig. 2 is a sectional view of a compressor according to an embodiment;

FIG. 3 is a top view of a compression mechanism according to an embodiment;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a schematic structural view of a compression mechanism according to an embodiment;

FIG. 7 is a schematic view of the structure of FIG. 6 without the upper muffler;

FIG. 8 is a schematic structural view of the upper bearing with bolts, lift stops and exhaust valve plates according to an embodiment;

FIG. 9 is a top view of an upper bearing according to an embodiment;

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

FIG. 11 is a top view of a cylinder according to an embodiment;

FIG. 12 is a schematic view of a structure of an assembled vane and elastic member in a cylinder according to an embodiment;

FIG. 13 is a schematic view of an assembly structure of the sliding piece and the elastic member according to the embodiment;

fig. 14 is a plan view of an assembly structure of a motor and a housing according to the embodiment;

fig. 15 is a schematic structural view of a piston according to the first embodiment;

fig. 16 is a sectional view of the piston according to the first embodiment;

fig. 17 is a sectional view of the piston according to the first embodiment assembled to the compression mechanism;

FIG. 18 is an enlarged view of portion C of FIG. 17;

fig. 19 is a schematic structural view of a piston according to a second embodiment;

FIG. 20 is a cross-sectional view of a piston according to a second embodiment;

FIG. 21 is a schematic diagram of an eccentric crankshaft according to an embodiment;

FIG. 22 is a schematic view of an assembly of a motor and a capillary heat pipe according to an embodiment;

FIG. 23 is a schematic structural diagram of a capillary heat pipe according to an embodiment;

FIG. 24 is a schematic view of an assembly structure of an exhaust pipe and a housing according to an embodiment;

FIG. 25 is a schematic structural view of an exhaust pipe according to an embodiment;

FIG. 26 is an exploded view of an exhaust pipe according to an embodiment;

fig. 27 is a schematic structural view of the exhaust pipe according to the embodiment, as viewed from the bottom side;

fig. 28 is a graph of compressor COP according to an embodiment;

reference numerals:

100-shell, 110-top shell, 120-bottom shell, 130-circumferential shell, 140-oil pool, 150-magnet ring;

200-motor, 210-stator, 211-projection, 212-recess, 213-socket, 220-rotor, 230-exhaust channel;

300-a compression mechanism;

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 and 316-upper oil blade;

320-cylinder, 321-upper cylinder, 322-lower cylinder, 323-cylinder inlet, 324-exhaust notch, 325-slide groove, 326-perforation;

330-bearing, 331-upper bearing, 332-lower bearing, 333-bearing exhaust hole, 334-exhaust valve plate and 335-lift limiter;

340-a middle separator;

350-silencer, 351-upper silencer, 3511-upper silencer exhaust hole, 352-lower silencer;

360-piston, 361-upper piston, 362-lower piston, 363-step, 364-groove, 3651-upper peripheral wall section, 3652-lower peripheral wall section;

370-sliding sheet, 371-extending part, 372-cambered surface, 373-elastic part;

380-through hole;

391-first upper bolt, 392-second upper bolt;

400-an exhaust pipe, 410-a spiral pipe section, 411-a first pipe section, 412-a second pipe section, 420-a straight pipe section and 430-oil leakage holes;

500-air inlet pipe;

600-heat pipe, 610-heat absorption section, 620-capillary structure section, 630-heat release section, 640-metal pipe;

700-a semiconductor wafer;

w-seal width;

d1-the ratio of the shaft diameters of the main shaft section and the auxiliary shaft section of the eccentric crankshaft;

d2-the shaft diameter of the eccentric shaft section of the eccentric crankshaft;

dcy 1-cylinder bore;

Hcy-Cylinder height.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to 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 those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

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

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

[ air-conditioner ]

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 cooling and heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

The low-temperature and low-pressure refrigerant enters the compressor, the compressor compresses the refrigerant gas in a high-temperature and 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 high-temperature and high-pressure liquid-phase refrigerant condensed 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 cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the 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 serve as a condenser or an evaporator. When the indoor heat exchanger serves 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 indoor heat exchanger and the outdoor heat exchanger are switched to be used as a condenser or an evaporator, a four-way valve is generally adopted, and specific reference is made to the arrangement of a conventional air conditioner, which is not described herein again.

The refrigeration working principle of the air conditioner is as follows: the compressor works to enable the interior of the indoor heat exchanger (in the indoor unit, the 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 the indoor fan is cooled by the coil pipe of the indoor heat exchanger to become cold air to be blown into a room, the evaporated and vaporized refrigerant is compressed by the compressor, is condensed into liquid in a high-pressure environment in the outdoor heat exchanger (in the outdoor unit, the condenser at the moment) to release heat, and the heat is dissipated into the atmosphere through the outdoor fan, so that the refrigeration effect is achieved by circulation.

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

[ compressor ]

The compressor in this embodiment is a rolling rotor compressor, and referring to fig. 1 and 2, the compressor 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 a refrigerant, and the motor 200 is disposed above the compression mechanism 300.

The motor 200 includes a stator 210 and a rotor 220, and the stator 210 is fixedly connected to the inner wall of the casing 100 to realize the fixed installation of the motor 200 in the inner cavity of the compressor.

The compression mechanism 300 includes an eccentric crankshaft 310, a cylinder 320, a piston 360, and a bearing 330.

Referring to fig. 21, the eccentric crankshaft 310 includes a main shaft section 311, an eccentric shaft section, and an auxiliary shaft section 315, the main shaft section 311 being fixedly connected with the rotor 220; referring to fig. 2, a piston 360 is disposed in a compression chamber of the cylinder, and the piston 360 is sleeved on the eccentric shaft section; the bearing 330 is fixedly connected with the cylinder 320, a bearing exhaust hole 333 is arranged on the bearing 330, and the bearing exhaust hole 333 is communicated with the compression cavity; be equipped with the sliding vane groove 325 on the cylinder 320, be equipped with gleitbretter 370 in the sliding vane groove 325, eccentric crankshaft 310 drive piston 360 is circumferential motion in the compression chamber, and gleitbretter 370 is along sliding vane groove 325 reciprocating motion, and gleitbretter 370 supports with piston 360 all the time and leans on, and gleitbretter 370 and piston 360 divide into high-pressure chamber and low-pressure chamber with the compression chamber.

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 360 sleeved on the eccentric shaft section of the eccentric crankshaft to do eccentric circular motion in the compression cavity of the cylinder 320, the sliding sheet 370 reciprocates in the sliding sheet groove 325, the compression cavity of the cylinder 320 is divided into a high-pressure cavity and a low-pressure cavity by the sliding sheet 370 and the piston 360, the eccentric crankshaft 310 drives the piston 360 to rotate for a circle, so that air is sucked from the low-pressure cavity and exhausted from the high-pressure cavity to complete one-time exhaust, the compressor compresses air, and the compressed air is exhausted through the bearing exhaust hole 333.

In some embodiments, the casing 100 includes a top casing 110, a bottom casing 120, and a circumferential casing 130 disposed between the top casing 110 and the bottom casing 120, wherein the top casing 110, the bottom casing 120, and the circumferential casing 130 enclose an inner cavity of the compressor.

The exhaust pipe 400 is connected to the top case 110, the intake pipe 500 is connected to the circumferential housing 130, and the intake pipe 500 is communicated with the cylinder intake hole 323.

The casing 100 is provided with a mounting base for fixing the compressor in other mechanisms (such as an outdoor unit of an air conditioner).

Fig. 1 and 2 show a double-cylinder rolling rotor 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 a middle partition 340.

Referring to fig. 4, 6 and 7, the eccentric crankshaft 310 sequentially includes a main shaft section 311, an upper eccentric shaft section 312, a connecting shaft section 313, a lower eccentric shaft section 314 and an auxiliary shaft section 315 from top to bottom, an upper piston 361 capable of performing eccentric motion is disposed in a 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 a 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 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 connected to the lower cylinder 322.

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

With reference to fig. 2, the upper bearing 331 is provided with an upper muffler 351, the upper muffler 351 covers the exhaust hole of the upper bearing 331, and the compressed air in the upper cylinder 321 is firstly exhausted into the space enclosed by the upper muffler 351 and the upper bearing 331 through the exhaust hole of the upper bearing 331 and then exhausted into the inner cavity of the compressor through the upper muffler exhaust hole 3511.

The lower bearing 332 is provided with a lower silencer 352, the lower silencer 352 covers the exhaust hole of the lower bearing 332, and the compressed air in the lower cylinder 322 is firstly exhausted to the space surrounded by the lower silencer 352 and the lower bearing 332 through the exhaust hole on the lower bearing 332.

Different from the above, the lower muffler 352 has no exhaust hole, 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 380 penetrating up and down, and the compressed air in the lower bearing 332 and the lower muffler 352 is exhausted up to the space enclosed by the upper bearing 331 and the upper muffler 351 through the through holes 380 and then exhausted to the inner cavity of the compressor through the upper muffler exhaust hole 3511.

In some embodiments of the present application, referring to fig. 6 to 9, a plurality of upper first bolts 391 penetrate the upper bearing 331 and the upper cylinder 321 from top to bottom; a plurality of upper second bolts 392 pass through the upper muffler 351, the upper bearing 331, the upper cylinder 321, the middle partition 340, and the lower cylinder 332 from top to bottom;

a plurality of lower first bolts (not labeled) penetrate through the lower bearing 332 and the lower cylinder 322 from bottom to top; a plurality of lower second bolts (not labeled) penetrate through the lower muffler 352, the lower bearing 332, the lower cylinder 322, the middle partition 340 and the upper cylinder 321 from bottom to top;

the upper first bolt 391 is vertically opposite to the lower second bolt, and the upper second bolt 392 is vertically opposite to the lower first bolt, so that the assembly of the double-cylinder compression mechanism is realized, all parts are reliably connected, and stable assembly is realized by fewer bolts.

It can be understood that through holes are correspondingly formed in the upper bearing 331, the lower bearing 332, the upper cylinder 321, the lower cylinder 322, the upper silencer 351, the lower silencer 352 and the middle partition plate 340 respectively, some through holes are used for mounting bolts, and some through holes are used for exhausting air of the lower cylinder 322.

In the structure shown in fig. 6 to 9, three through holes 380 for exhausting gas from the lower cylinder, three upper first bolts 391, three upper second bolts 392, three lower first bolts 392, and three lower second bolts are provided, and the upper first bolts 391 and the upper second bolts 392 are provided on both sides of the through holes 380.

In some embodiments of the present application, referring to fig. 2, the upper bearing 331 is fixedly connected to the inner wall of the shell 100, so as to realize the fixed installation of the compression mechanism 300 in the compressor.

In some embodiments of the present application, the cylinder 320 may be fixedly connected to the inner wall of the casing 100, and the fixed installation of the compression mechanism 300 can also be achieved.

[ Cylinder and eccentric crankshaft ]

In some embodiments of the present application, referring to fig. 10 and 11, the inner diameter of the cylinder 320 (i.e., the inner diameter of the compression chamber) is Dcy1, the height of the cylinder 320 is Hcy, and the eccentricity of the eccentric crankshaft 310 is e; referring to fig. 21, the shaft diameter ratio of the main shaft section 311 and the auxiliary shaft section 315 of the eccentric crankshaft is D1, the shaft diameter of the eccentric shaft section (the shaft diameter of the upper eccentric shaft section 312 is the same as that of the lower eccentric shaft section 314) is D2, and the shaft diameter of the eccentric shaft section (D2/D1)/(Dcy1/Hcy) is 0.5 or more and is less than 1.

Fig. 28 is a graph showing the COP of the compressor when the compressor is designed with the cylinder and the eccentric crankshaft using the above formula, and it can be seen that the compressor has a better COP when the data of (D2/D1)/(Dcy1/Hcy) is between 0.5 and 1.

[ Cylinder and piston ]

In the configuration shown in fig. 4 and 5, the piston 360 is a hollow cylindrical structure having a through bore.

The application also provides two other piston embodiments.

In the first piston embodiment, referring to fig. 15 to 18, a step 363 is provided on an end of the piston 360 and extends inward, and a sealing surface is provided between the step 363 and the bearing 330, and the sealing surface is close to the bearing vent hole 333.

In the first piston, by adding a step structure to the inner circle of the piston 360, while the sealing between the inner circle of the piston and the bearing exhaust hole 333 is ensured, the exhaust notch on the cylinder 320 can be eliminated, the clearance volume loss of the compressor is reduced, and the COP of the compressor is improved.

Second piston embodiment, referring to fig. 19 and 20, the inner circumferential wall of the piston 360 is provided with an annular groove 364 extending in the circumferential direction thereof, the groove 364 being spaced apart from the top and bottom of the piston 360, respectively, the groove 364 not contacting the eccentric shaft section.

The second piston reduces the contact area between the piston 360 and the eccentric crankshaft 310 by providing the circumferential groove 364, reduces the friction loss between the two, and reduces the piston weight, so as to improve the working efficiency of the compressor and reduce the energy consumption.

The inner circumferential wall of the piston 360 comprises an upper circumferential wall section 3651, a groove 364 and a lower circumferential wall section 3652, the groove 364 is arranged between the upper circumferential wall section 3651 and the lower circumferential wall section 3652, the upper circumferential wall section 3651 and the lower circumferential wall section 3652 are respectively in clearance fit with the eccentric shaft section, the width of the upper circumferential wall section 3651 is equal to that of the lower circumferential wall section 3652, reliable assembly between the piston 360 and the eccentric shaft section is guaranteed, and meanwhile the contact area between the piston 360 and the eccentric shaft section is reduced.

The width of groove 364 is smaller than the widths of upper circumferential wall section 3651 and lower circumferential wall section 3652, ensuring the structural strength of piston 360.

[ Cylinder and sliding vane ]

In some embodiments of the present application, referring to fig. 10 to 13, the sliding vane slot 325 is an elongated slit structure extending from the inner circumferential wall of the cylinder 320 to the outer side thereof, one end of the sliding vane 370 abuts against the piston 360, the other end of the sliding vane 370 is provided with an elastic member 373 (e.g., a spring), and the elastic member 373 applies an acting force to the sliding vane 370 to make the sliding vane 370 always abut against the piston 360.

When the piston 360 moves towards a direction close to the sliding vane 370 under the driving of the eccentric crankshaft 310, the sliding vane 370 is squeezed, and the elastic member 373 is compressed under a force; the piston 360 continues to move in the direction away from the sliding piece 370 under the driving of the eccentric crankshaft 310, and the elastic piece 373 rebounds to eject the sliding piece 370, so that the sliding piece 370 is always abutted against the piston 360, and the separation of a high-pressure cavity and a low-pressure cavity in the cylinder 320 is ensured.

In some embodiments of the present disclosure, a through hole 326 is formed in the cylinder 320, the through hole 326 extends from an outer wall of the cylinder 320 to an inner side thereof to communicate with the sliding vane groove 325, the elastic member 373 is disposed in the through hole 326, and the elastic member 373 extends through the through hole 326 to abut against an inner wall of the shell 100 of the compressor.

During assembly, the sliding sheet 370 is inserted into the sliding sheet groove 325 along the vertical direction, and then the elastic member 373 is inserted into the through hole 326 from the outer side of the cylinder 320, so that one end of the elastic member 373 is connected with one end of the sliding sheet 370, and the installation is facilitated.

In some embodiments of the present application, one end of the sliding piece 370 is provided with three extending portions 371 arranged at intervals along the height direction thereof, and one end of the elastic member 373 is sleeved on the extending portion 371 in the middle, so that the connection between the sliding piece 370 and the elastic member 373 can be realized.

In some embodiments of the present application, the upper side of the extension 371 in the middle extends obliquely upward from the outer end of the extension, and the lower side extends obliquely downward from the outer end of the extension, that is, the extension 371 is similar to a wedge-shaped structure, so that the spring can be inserted into the extension 371 through the through hole 326.

In some embodiments of the present application, an end surface of the sliding vane 370 abutting against the piston 360 is an arc surface 372, so as to ensure smooth abutting between the sliding vane 370 and the piston 360, and not to affect eccentric rotation of the piston 360.

[ Cylinder and bearing ]

In some embodiments of the present application, referring to FIG. 5, the end face of piston 360 has a sealing surface, the width of which is labeled W, between it and bearing 330 at a location near its inner cavity; referring to fig. 10, the inner cavity wall of the cylinder 320 is provided with an exhaust slit 324 extending obliquely toward the end surface of the cylinder 320, and the exhaust slit 324 extends to the exhaust hole 333 of the bearing 330 and communicates with the bearing exhaust hole 333. The sealing surface is adjacent to the bearing exhaust hole 333 and is located on the side opposite to the exhaust cutout 324.

The compressed air in the compression chamber of the cylinder 320 flows into the bearing exhaust hole 333 through the exhaust slit 324 and is discharged.

In some embodiments of the present application, referring to fig. 8 and 9, a lift limiter 335 and an exhaust valve plate 334 are disposed on the bearing 330, the exhaust valve plate 334 is used for opening or closing the bearing exhaust hole 333, and the lift limiter 335 is used for limiting the displacement of the exhaust valve plate 334.

The bearing 330 is provided with a mounting groove, the lift limiter 335 is a sheet structure, and one end of the lift limiter 335 and one end of the exhaust valve plate 334 are fixedly arranged in the mounting groove through bolts. During exhaust, the exhaust valve 334 is opened under the impulsive force of the compressed air, the compressed air is exhausted, and after the exhaust is finished, the exhaust valve 334 automatically resets.

[ electric Motor ]

In some embodiments of the present application, referring to fig. 2 and 22, the motor 200 is cooled by a capillary heat pipe 600.

Referring to fig. 23, the heat pipe 600 includes a heat absorbing section 610, a capillary structure section 620, and a heat releasing section 630, the capillary structure section 620 is disposed between the heat absorbing section 610 and the heat releasing section 620, the heat pipe 600 is filled with a working fluid (e.g., water), the heat absorbing section 610 is connected to the stator 210 to mount the heat pipe 600 to the motor 200, and the capillary structure section 620 and the heat releasing section 630 are protruded from the stator 210.

The motor 200 generates a large amount of heat during operation, the heat absorption section 610 absorbs the heat of the motor, the working liquid in the heat absorption section 610 is heated and evaporated to become steam, the heat is taken away, the steam flows to the heat release section 630 from the central channel, and is condensed to liquid and releases latent heat at the same time, under the action of the capillary structure section 620, the liquid in the heat release section 620 flows back to the heat absorption section 610 again, so that a closed cycle is completed, a large amount of heat generated by the motor 200 is continuously transferred to the heat release section 630 from the heat absorption section 610, the working temperature of the motor is reduced, and the working efficiency and the reliability of the compressor are improved.

In some embodiments of the present application, with reference to fig. 23, the heat pipe 600 includes a metal pipe 640, the metal pipe 640 may be made of copper or other material with good heat conduction and heat dissipation performance, and a containing cavity is formed in the metal pipe 640 and filled with working liquid; the capillary structure section 620 is arranged in the containing cavity, the heat absorbing section 610 is arranged at one end of the containing cavity, and the heat releasing section 630 is arranged at the other end of the containing cavity.

In some embodiments of the present application, referring to fig. 22 and 14, a protrusion 211 and a recess 212 are formed on an outer circumferential wall of a stator 210 of a motor.

The protrusion 211 is fixedly connected with the inner wall of the housing 100, so as to realize the fixed installation of the motor 200.

An exhaust passage 230 is formed between the recess 212 and the inner wall of the casing 100, and the compressed air flowing out of the compression mechanism 300 flows between the motor 200 and the top case 110 through the exhaust passage 230 and is exhausted through the exhaust pipe 400 at the top.

The plurality of exhaust passages 230 are uniformly spaced along the circumferential direction of the motor, thereby improving exhaust efficiency.

The heat pipe 600 is inserted on the protrusion 211, which facilitates the assembly between the heat pipe 600 and the motor 200, and does not affect the arrangement of the exhaust channel 230 and the exhaust efficiency of the compressor.

In some embodiments of the present application, each protrusion 211 is provided with a plurality of insertion holes 213 arranged at intervals, and a heat pipe 600 is inserted into each insertion hole 213, so that the number of heat pipes is large, and the heat dissipation efficiency is improved.

In some embodiments of the present application, the bottom of the inner cavity of the compressor is an oil sump 140, and the oil sump 140 contains lubricating oil. Referring to fig. 2, an upper oil vane 316 is disposed in an inner cavity of the eccentric crankshaft 310, the upper oil vane 316 rotates to suck up a lubricating mechanism in the oil sump 140, and the lubricating oil flows to corresponding components to be lubricated through a plurality of oil holes (not shown) disposed on the eccentric crankshaft 310.

The magnet ring 150 is arranged in the oil pool 140 and used for adsorbing impurities such as scrap iron and the like in the oil pool 140, so that the purity of lubricating oil is kept, and the lubricating effect of parts is improved.

Referring to fig. 2 and 22, the heat pipe 600 extends downward from the stator 210 of the motor into the oil sump, and the heat radiating section 630 is located in the oil sump 140.

The heat released by the heat releasing section 640 heats the lubricating oil in the oil pool 140, so that the heat is recycled, the problem of poor fluidity caused by low temperature of the lubricating oil is avoided, and the lubricating effect of each part in the compressor is improved.

In some embodiments of the present application, taking the dual-cylinder compressor shown in fig. 2 as an example, the upper bearing 331 is fixedly connected to the inner wall of the casing 100, a nozzle (not labeled) for the capillary heat pipe 600 to pass through is disposed on the upper bearing 331, the capillary heat pipe 600 does not pass through the upper cylinder 321, the lower cylinder 322, the middle partition 340, the lower bearing 332, the upper muffler 351 and the lower muffler 352, and the heat pipe 600 is located at the periphery of these components.

Only one heat pipe 600 is illustrated in the configuration shown in fig. 2.

[ semiconductor wafer ]

In some embodiments of the present application, referring to fig. 1, a semiconductor wafer 700 is disposed outside the housing 100. The semiconductor wafer 700 is a P-N junction formed of a special semiconductor material to form a thermocouple pair, which generates a peltier effect to transfer heat of the compressor to the outside.

In some embodiments of the present application, the semiconductor fin 700 extends along the circumferential direction of the outer circumferential wall of the casing 100, so as to increase the area of the semiconductor fin and improve the heat dissipation effect.

The semiconductor wafer 700 is disposed adjacent to the oil sump 140 to improve a heat exchange effect with the oil sump 140.

In some embodiments of the present application, when the temperature in the oil sump 140 is lower than the first set value, the semiconductor wafer 700 heats the casing 100 at this time, so as to heat the oil sump 140, heat the refrigerating machine oil, increase the temperature of the machine oil, and improve the fluidity of the machine oil.

When the temperature in the oil pool 140 is higher than the second set value, the semiconductor wafer 700 refrigerates the shell, and meanwhile, the temperature of the refrigerating machine oil in the oil pool is reduced, and the over-high temperature of the whole compressor can be avoided.

[ exhaust pipes ]

In some embodiments of the present application, referring to fig. 24 to 27, the discharge pipe 400 is disposed at the top of the housing 100, the discharge pipe 400 is located above the motor 200, and the refrigerant gas compressed by the compression mechanism 300 is discharged through the discharge pipe 400.

The exhaust pipe 400 has a spiral pipe section 410, the spiral pipe section 410 is disposed near an air inlet end of the exhaust pipe 400, the spiral pipe section 410 is disposed in an inner cavity of the compressor and between the motor 200 and the top case 110, and a plurality of oil leakage holes 430 are disposed on a wall of the spiral pipe section 410.

Refrigerant compressed gas is the mixture that gas and refrigerator oil droplet are little before the compressor is discharged through blast pipe 400, because oil droplet is big than gaseous quality, can throw away the great oil droplet of weight to the wall of spiral pipe section 410 under the centrifugal force effect when refrigerant compressed gas flows through spiral pipe section 410 on, directly drips the inner chamber to the compressor through oil leak hole 430 again, reduces the oil-spitting rate of compressor, guarantees the inside machine oil volume of compressor, improves the compressor reliability.

In some embodiments of the present application, the spiral pipe section 410 includes a first pipe section 411 and a second pipe section 412, the first pipe section 411 is disposed at an upper portion of the second pipe section 412, the first pipe section 411 is of a vertical pipe structure, the second pipe section 412 is of a spiral pipe structure, and an oil leakage hole 430 is formed in a wall of the second pipe section 412.

Refrigerant gas compressed by the compression mechanism 300 is discharged through the second pipe section 412 and the first pipe section 411 in sequence, oil drops are thrown out through the centrifugal action of the spiral structure of the second pipe section 412, and then compressed gas is directly discharged through the second pipe section 412, so that the oil drop separation effect is improved.

In some embodiments of the present application, the air inlet end of the second pipe segment 412 is the air inlet end of the exhaust pipe 400, that is, the refrigerant compressed air in the compressor cavity directly passes through the spiral pipe first when flowing through the exhaust pipe 400, and oil drops are separated in the first time.

The second pipe section 412 spirals in the horizontal plane, and the second pipe section 412 spirals to the first pipe section 411 from the air inlet end, so that the size of the second pipe section 412 in the vertical height is reduced and the occupied space is reduced on the premise of ensuring the length of the spiral structure of the second pipe section 412, so that the second pipe section 412 is convenient to install in a small space between the top wall of the shell and the motor, and the increase of the height size of the compressor cannot be caused.

In some embodiments of the present application, the second pipe section 412 is coiled in a horizontal plane for a circle, the first pipe section 411 is located inside an air inlet end of the second pipe section 412, and the first pipe section 411 extends upward to be connected to the straight pipe section 420, so that, from the overall structure of the exhaust pipe 400, the vertical pipe section is located inside an area surrounded by the spiral pipe sections, and after the exhaust pipe 400 is installed on the housing, the overall structure of the exhaust pipe 400 is stable. If the vertical pipe section is located on the outer side of the area surrounded by the spiral pipe section, the overall structure of the exhaust pipe is at a risk of inclination, and the structure is unstable.

In some embodiments of the present application, oil leakage holes 430 are formed in the bottom wall and/or the side wall of the spiral pipe section 410, and the oil leakage holes 430 are arranged at intervals, so that the oil leakage effect is improved.

In some embodiments of the present application, the exhaust pipe 400 further includes a straight pipe section 420, the straight pipe section 420 is disposed on the upper portion of the spiral pipe section 410, and the straight pipe section 420 is fixedly connected to the top shell 110, so that the exhaust pipe 400 is fixedly mounted on the casing 100.

The refrigerant gas compressed by the compression mechanism 300 is discharged through the spiral pipe section 410 and the straight pipe section 420 in sequence.

In some embodiments of the present application, the top of the spiral pipe section 410 is inserted into the inner side of the straight pipe section 420, and a limiting protrusion (not shown) for limiting the upward movement of the spiral pipe section 410 is disposed on the inner wall of the straight pipe section 420, so that the connection between the two is reliable.

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

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A rotary compressor is provided with a compression mechanism for compressing refrigerant in an inner cavity, wherein the compression mechanism comprises an eccentric crankshaft and a cylinder;

the piston is driven by an eccentric crankshaft to do circumferential motion in the compression cavity, and the compression cavity is divided into a high-pressure cavity and a low-pressure cavity by the slide sheet and the piston;

the eccentric crankshaft is provided with a main shaft section, an auxiliary shaft section and an eccentric shaft section, the piston is sleeved on the eccentric shaft section, the ratio of the shaft diameters of the main shaft section and the auxiliary shaft section is D1, the shaft diameter of the eccentric shaft section is D2, the inner diameter of the compression cavity is Dcy1, and the height of the cylinder is Hcy;

0.5≤(D2/D1)/(Dcy1/Hcy)≤1。

2. the compressor of claim 1,

the eccentric crankshaft sequentially comprises a main shaft section, an upper eccentric shaft section, a connecting shaft section, a lower eccentric shaft section and an auxiliary shaft section from top to bottom;

the main shaft section is connected with a motor of the compressor;

an upper piston is sleeved on the upper eccentric shaft section and is positioned in a compression cavity of the upper air cylinder;

a lower piston is sleeved on the lower eccentric shaft section and is positioned in a compression cavity of the lower air cylinder;

a middle partition plate is sleeved on the connecting shaft section and located between the upper air cylinder and the lower air cylinder.

3. The compressor of claim 2,

the compression mechanism further comprises an upper bearing and a lower bearing, the upper bearing is sleeved on the main shaft section and connected with the upper cylinder, and the lower bearing is sleeved on the auxiliary shaft section and connected with the lower cylinder;

the silencer is characterized by further comprising an upper silencer and a lower silencer, wherein the upper silencer is connected with the upper bearing, and the lower silencer is connected with the lower bearing.

4. Compressor according to claim 3,

a plurality of upper first bolts penetrate through the upper bearing and the upper air cylinder from top to bottom;

a plurality of upper second bolts penetrate through the upper silencer, the upper bearing, the upper air cylinder, the middle partition plate and the lower air cylinder from top to bottom;

a plurality of lower first bolts penetrate through the lower bearing and the lower cylinder from bottom to top;

a plurality of lower second bolts penetrate through the lower silencer, the lower bearing, the lower cylinder, the middle partition plate and the upper cylinder from bottom to top;

the upper first bolt is opposite to the lower second bolt, and the upper second bolt is opposite to the lower first bolt.

5. The rotary compressor of any one of claims 1 to 4,

an oil pool for containing lubricating oil is arranged at the bottom of an inner cavity of the compressor, and a semiconductor wafer is arranged on the outer side of a shell of the compressor;

when the temperature in the oil pool is lower than a first set value, the semiconductor wafer heats the shell;

and when the temperature in the oil pool is higher than a second set value, the semiconductor wafer refrigerates the shell.

6. The rotary compressor of claim 5,

the semiconductor wafer extends along the circumferential direction of the outer peripheral wall of the shell, and the semiconductor wafer is arranged close to the oil pool.

7. The rotary compressor of claim 5,

still be equipped with the motor in the inner chamber of compressor, the motor is located compressing mechanism's top, the motor is connected with capillary heat pipe, capillary heat pipe certainly the motor passes through compressing mechanism downwardly extending to in the oil bath, be used for with the heat transfer of motor extremely the oil bath.

8. The rotary compressor of any one of claims 1 to 4,

the top of the shell of the compressor is provided with an exhaust pipe, and the refrigerant gas compressed by the compression mechanism is discharged through the exhaust pipe;

the exhaust pipe is provided with a spiral pipe section, the spiral pipe section is close to the air inlet end of the exhaust pipe and located in the inner cavity of the compressor, and a plurality of oil leakage holes which are arranged at intervals are formed in the wall of the spiral pipe section.

9. The rotary compressor of claim 8,

and the bottom wall and/or the side wall of the spiral pipe section is/are provided with the oil leakage hole.

10. An air conditioner is characterized in that the air conditioner comprises a shell,

comprising the rotary compressor of any one of claims 1 to 9.

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