CN215058154U - Compressor and refrigerating system - Google Patents

Abstract

The utility model discloses a compressor and refrigerating system, the compressor includes the casing, motor element, bent axle and compression cylinder subassembly, the casing is equipped with the inner chamber, the intracavity storage has lubricating oil, motor element and bent axle are all established in the casing, the bent axle links to each other with motor element, motor element is used for driving the bent axle and rotates, the bent axle includes eccentric section, compression cylinder subassembly is established in the casing, compression cylinder subassembly includes the cylinder, first axletree, second axletree and piston, the cylinder is established between first axletree and second axletree, be equipped with the compression chamber in the cylinder, the bent axle passes the cylinder, first axletree, the second axletree and with first axletree, second axletree normal running fit, eccentric section cooperation is in the compression intracavity, the piston cover is established in the periphery side of eccentric section and is located the compression intracavity, be equipped with on at least one of first axletree and second axletree and the axletree and supply oil hole. The utility model discloses a compressor can increase the fuel delivery of piston, has guaranteed the sealed effect of piston oil film and the refrigerating capacity of compressor, has promoted the performance of compressor.

Description

Compressor and refrigerating system

Technical Field

The utility model relates to a compressor technical field specifically, relates to a compressor and refrigerating system who has this compressor.

Background

The compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. In the rotary compressor, a lubricating oil is sealed in a casing, and the lubricating oil can form an oil film on a sliding surface of a component such as a crankshaft to perform lubrication and reduce wear, and can form an oil film between a piston and a main shaft plate and between the piston and a sub shaft plate to perform an effect of blocking high-pressure gas in the inner periphery of the piston at the inner periphery of the piston. However, in the related art, the high-pressure gas at the inner periphery of the piston is easily leaked into the compression cavity at the outer periphery of the piston, and the high-pressure gas in the compression cavity inhibits the inflow of the low-pressure gaseous refrigerant in the suction pipe, so that the refrigerating capacity of the compressor is reduced, and the effective energy utilization rate and the performance of the compressor are reduced.

SUMMERY OF THE UTILITY MODEL

The present invention is made based on the discovery and recognition by the inventors of the following facts and problems:

in the operation process of the compressor, the liquid level of lubricating oil in the compressor can be reduced, so that the oil quantity of the lubricating oil supplied to a crankshaft is reduced easily, the oil supply quantity of a piston is reduced easily, and the sealing effect of an oil film is reduced. In addition, the oil droplets generated in the shaft hole of the crankshaft easily flow out of the inner periphery of the piston, and the amount of oil supplied to the piston is also reduced, which is disadvantageous in sealing the oil film.

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

Therefore, the embodiment of the utility model provides a compressor, this compressor can increase the fuel delivery of piston, has guaranteed the sealed effect of piston oil film, and then has guaranteed the refrigerating output of compressor, has promoted the performance of compressor.

The embodiment of the utility model provides a still provide a refrigerating system who uses above-mentioned compressor.

According to the utility model discloses compressor includes: the lubricating oil pump comprises a shell, a pump body and a pump body, wherein the shell is provided with an inner cavity, and lubricating oil is stored in the inner cavity; the motor assembly and the crankshaft are arranged in the shell, the crankshaft is connected with the motor assembly, the motor assembly is used for driving the crankshaft to rotate, and the crankshaft comprises an eccentric section; compression cylinder subassembly, the compression cylinder subassembly is established in the casing, the compression cylinder subassembly includes cylinder, first axletree board, second axletree board and piston, the cylinder is established first axletree board with between the second axletree board, be equipped with the compression chamber in the cylinder, the bent axle passes the cylinder first axletree board the second axletree board and with first axletree board second axletree board normal running fit, the cooperation of eccentric section is in the compression chamber, the piston cover is established the periphery side of eccentric section is located in the compression chamber, first axletree board with be equipped with the oil feed hole on at least one of second axletree board, the oil feed hole is used for supplying the lubricating oil extremely in the hole that the internal perisporium of piston encloses.

According to the utility model discloses compressor, this compressor can increase the fuel feeding capacity of piston, has guaranteed the sealed effect of piston oil film, and then has guaranteed the refrigerating output of compressor, has promoted the performance of compressor.

In some embodiments, the eccentric section is provided with a through hole extending in an axial direction of the crankshaft and penetrating the eccentric section, the through hole being for the lubricating oil on one side of the eccentric section to flow to the other side of the eccentric section.

In some embodiments, a thickness dimension of the eccentric section in the axial direction of the crankshaft is smaller than a thickness dimension of the piston in the axial direction of the crankshaft.

In some embodiments, the eccentric section, the piston, and the first shaft plate enclose a first cavity, the eccentric section, the piston, and the second shaft plate enclose a second cavity, and the first cavity and the second cavity are located on opposite sides of the eccentric section.

In some embodiments, the compressor is a vertical compressor, the first shaft plate is located above the second shaft plate, the oil supply hole is formed in the second shaft plate, and the oil supply hole is communicated with the second cavity.

In some embodiments, the oil supply hole is arranged obliquely with respect to the horizontal direction, and an inlet of the oil supply hole is lower than an outlet of the oil supply hole.

In some embodiments, a conduit is provided on the second shaft plate, a lumen of the conduit is communicated with the oil supply hole, and an inlet of the conduit is lower than an outlet of the conduit.

In some embodiments, a first annular groove is formed in the first shaft plate, a second annular groove is formed in the second shaft plate, the first annular groove and the second annular groove are both arranged around the periphery of the crankshaft, the first annular groove is communicated with the first cavity, the second annular groove is communicated with the second cavity, and the oil supply hole in the second shaft plate is communicated with the second cavity through the second annular groove.

In some embodiments, the compressor is a vertical compressor, a shaft center hole is formed in the crankshaft, an inlet of the shaft center hole is formed in a bottom end of the crankshaft, the shaft center hole extends in an axial direction of the crankshaft and penetrates through the eccentric section, and an oil groove is formed in an outer peripheral side of the eccentric section and is communicated with the shaft center hole through an oil hole.

In some embodiments, the crankshaft is provided with an air hole, the air hole is positioned above the first shaft plate, and the shaft middle hole is communicated with the inner cavity of the shell through the air hole.

In some embodiments, the cylinder includes a plurality of sub-cylinders, the piston includes a plurality of sub-pistons, the plurality of sub-pistons are disposed in compression cavities of the plurality of sub-cylinders in a one-to-one correspondence, the plurality of sub-cylinders are sandwiched between the first shaft plate and the second shaft plate, two adjacent sub-cylinders are spaced apart by a partition plate, a central hole is disposed on the partition plate, the crankshaft passes through the central hole, and the central hole is used for communicating inner holes of two adjacent sub-pistons.

According to the utility model discloses refrigerating system includes blast pipe, condenser, evaporimeter, expansion device, reservoir, breathing pipe and compressor, the compressor be according to arbitrary embodiment of the aforesaid compressor, the blast pipe with the inner chamber intercommunication of casing, the breathing pipe with compression chamber intercommunication, the condenser the evaporimeter expansion device the reservoir intercommunication is in the blast pipe with between the breathing pipe.

Drawings

Fig. 1 is a schematic cross-sectional view of the overall structure of a compressor according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view at X-X in FIG. 1.

Fig. 3 is a bottom enlarged schematic view of the compressor of fig. 1.

FIG. 4 is a schematic illustration in partial cross-section of the crankshaft of FIG. 1.

FIG. 5 is a second schematic partial cross-sectional view of the crankshaft of FIG. 1.

Fig. 6 is a schematic view of an oil supply hole of a compressor according to another embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a two-cylinder compressor according to yet another embodiment of the present invention.

Reference numerals:

a housing 1;

a motor assembly 2; a stator 21; a rotor 22;

a crankshaft 3; an eccentric section 31; an oil sump 311; oil holes 312; a first eccentric section 313; a second eccentric section 314; a through hole 32; a first through-hole 321; a second through hole 322; a shaft center hole 33; a spiral plate 331; an air hole 34;

a compression cylinder assembly 4; the first shaft plate 41; a first circular groove 411; a second shaft plate 42; a second annular groove 421; a cylinder 43; compression chamber 431; a first cylinder 432; a second cylinder 433; a piston 44; a first piston 441; the second piston 442; an oil supply hole 45; an exhaust vent 46; a slide 47; a partition plate 48; a central bore 481; a first cavity 49; a second cavity 410;

a muffler 5;

an air intake duct 6;

an exhaust pipe 7;

a condenser 8;

an expansion device 9;

an evaporator 10;

a reservoir 11;

and lubricating oil 12.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 5, a compressor according to an embodiment of the present invention includes a housing 1, a motor assembly 2, a crankshaft 3, and a compression cylinder assembly 4.

An inner cavity is arranged in the shell 1 of the compressor, and lubricating oil 12 is stored in the inner cavity. Specifically, as shown in fig. 1, the compressor according to the embodiment of the present invention is a vertical compressor, and in some other embodiments, the compressor may also be a horizontal compressor. Casing 1 can be split type structure, for example, as shown in fig. 1, casing 1 can include staving and upper cover, and the staving extends along upper and lower direction, and the upper end of staving is the opening, and the upper cover is sealed to be fixed at the upper end opening part of staving, from this, has made things convenient for motor element 2, bent axle 3, compression cylinder subassembly 4's installation and maintenance. Since the compressor is a vertical compressor, the lubricant 12 in the housing 1 will collect at the bottom of the compressor cavity.

Motor element 2 and bent axle 3 all establish in casing 1, and bent axle 3 links to each other with motor element 2, and motor element 2 is used for driving bent axle 3 to rotate, and bent axle 3 includes eccentric section 31. Specifically, as shown in fig. 1, the motor assembly 2 includes a stator 21 and a rotor 22, the stator 21 is a circular ring and the stator 21 is fixedly connected to the inner peripheral wall of the housing 1, and the rotor 22 is rotatably assembled in the stator 21. The motor assembly 2 is disposed above the compression cylinder assembly 4. The crankshaft 3 extends along the up-down direction, the top end of the crankshaft 3 is connected with the rotor 22, and the rotation driving of the crankshaft 3 can be realized through the motor component 2. One section of the crankshaft 3 is an eccentric section 31, and the eccentric section 31 is fitted in a cylinder 43 of the compression cylinder assembly 4.

The compression cylinder assembly 4 is arranged in the housing 1, the compression cylinder assembly 4 comprises a cylinder 43, a first shaft plate 41, a second shaft plate 42 and a piston 44, the cylinder 43 is arranged between the first shaft plate 41 and the second shaft plate 42, a compression cavity 431 is arranged in the cylinder 43, the crankshaft 3 passes through the cylinder 43, the first shaft plate 41 and the second shaft plate 42 and is in running fit with the first shaft plate 41 and the second shaft plate 42, the eccentric section 31 is matched in the compression cavity 431, the piston 44 is sleeved on the outer peripheral side of the eccentric section 31 and is located in the compression cavity 431, at least one of the first shaft plate 41 and the second shaft plate 42 is provided with an oil supply hole 45, and the oil supply hole 45 is used for supplying lubricating oil 12 to an inner hole surrounded by the inner peripheral wall of the piston 44.

Specifically, as shown in fig. 2 and 3, the cylinder 43 has a circular ring shape, the first shaft plate 41 is fixed to an upper side of the cylinder 43, the second shaft plate 42 is fixed to a lower side of the cylinder 43, and the first shaft plate 41 and the second shaft plate 42 may be fixed to the cylinder 43 by bolts. The first shaft plate 41, the cylinder 43 and the second shaft plate 42 enclose a compression chamber 431. The crankshaft 3 passes through the first shaft plate 41, the cylinder 43, and the second shaft plate 42 in the up-down direction, and the crankshaft 3 may be rotatably assembled by the main bearing and the first shaft plate 41, and the crankshaft 3 may be rotatably assembled by the sub bearing and the second shaft plate 42. The eccentric section 31 of the crankshaft 3 is fitted in the compression chamber 431 of the cylinder 43.

As shown in fig. 2, piston 44 is ring-shaped, piston 44 is fitted around the outer periphery of eccentric section 31 of crankshaft 3, and when crankshaft 3 rotates, piston 44 can perform circular motion in compression chamber 431 under the action of eccentric section 31. It should be noted that, during the circumferential movement of the piston 44, an oil film may be formed between the upper end surface of the piston 44 and the first shaft plate 41, and an oil film may be formed between the lower end surface of the piston 44 and the second shaft plate 42, so as to achieve the sealed isolation between the inner bore of the piston 44 and the compression chamber 431 outside the piston 44.

As shown in fig. 2, a slide sheet 47 is provided in the cylinder 43, the height dimension of the slide sheet 47 in the vertical direction is substantially equal to the height dimension of the compression chamber 431, the inner end of the slide sheet 47 extends into the compression chamber 431, the outer end of the slide sheet 47 is slidably assembled in the wall of the cylinder 43, and a spring is provided in the wall of the cylinder 43, and the spring can push the slide sheet 47 inward, so that the slide sheet 47 can always keep abutting against the outer peripheral wall of the piston 44 under the action of the spring. Piston 44 is in the rotation in-process, and piston 44 can end with the internal perisporium of cylinder 43 all the time, and from this, piston 44 and gleitbretter 47 can be separated compression chamber 431 for high pressure chamber and low pressure chamber, and one side of gleitbretter 47 is equipped with breathing pipe 6, and the opposite side of gleitbretter 47 is equipped with exhaust hole 46, and breathing pipe 6 and low pressure chamber communicate, and exhaust hole 46 communicates with the high pressure chamber.

When the compression cylinder assembly 4 operates, low-pressure gas can be introduced into a low-pressure chamber (a part of the compression chamber 431 corresponding to Ps in fig. 2) through the gas suction pipe 6, and as the piston 44 rotates, the space of the low-pressure chamber gradually becomes smaller and finally forms a high-pressure chamber (a part of the compression chamber 431 corresponding to Pd2 in fig. 2), in the process, the piston 44 can circumferentially compress the gas in the low-pressure chamber, so that the gas in the low-pressure chamber can be compressed into high-pressure gas, and the high-pressure gas can be discharged into the inner chamber of the housing 1 through the gas discharge hole 46.

Alternatively, a silencer 5 is disposed above the first shaft plate 41, and the high-pressure gas flowing out from the exhaust hole 46 may first flow into the silencer 5 to be subjected to silencing and noise reduction, and then be discharged into the inner cavity of the casing 1.

As shown in fig. 3, the second shaft plate 42 is positioned below the first shaft plate 41, the oil supply hole 45 is provided in the second shaft plate 42, the inlet of the oil supply hole 45 is positioned below the liquid level (OL in fig. 3, i.e., the liquid level), and the outlet of the oil supply hole 45 communicates with the inner hole of the piston 44, so that the lubricant 12 can be supplied into the piston 44 through the oil supply hole 45.

It is understood that in other embodiments, when the compressor is a horizontal compressor, the first shaft plate 41 and the second shaft plate 42 may be provided with oil supply holes 45, an inlet of each oil supply hole 45 is located below the liquid level of the lubricating oil 12, and an outlet of each oil supply hole 45 is communicated with the inner hole of the piston 44. Each oil supply hole 45 can supply the lubricating oil 12 into the piston 44.

According to the utility model discloses compressor, owing to add the fuel feeding hole 45 on first axle plate 41 and/or second axle plate 42, fuel feeding hole 45 can let in lubricating oil 12 in to piston 44, thereby increased the supply volume of lubricating oil 12 in the piston 44, and then guaranteed between piston 44 and the first axle plate 41, oil blanket effect between piston 44 and the second axle plate 42, the high-pressure gas in the piston 44 (the gas part that Pd1 corresponds in fig. 2) has been avoided flowing to the condition in the low-pressure intracavity of compression chamber 431 from piston 44 both ends face, ensured that the compressor has better refrigeration capacity, the performance of compressor has been promoted.

In some embodiments, the eccentric section 31 is provided with a through hole 32, the through hole 32 extends along the axial direction of the crankshaft 3 and penetrates through the eccentric section 31, and the through hole 32 is used for allowing the lubricating oil 12 on one side of the eccentric section 31 to flow to the other side of the eccentric section 31.

Specifically, as shown in fig. 3, the compressor is a vertical compressor, the through hole 32 is provided in the eccentric section 31 of the crankshaft 3, and the through hole 32 extends in the up-down direction and penetrates the upper end surface and the lower end surface of the eccentric section 31. Therefore, the lubricating oil 12 below the eccentric section 31 can flow to the upper part of the eccentric section 31 through the through hole 32, so that the upper end surface and the lower end surface of the piston 44 can be supplemented by more lubricating oil 12, and the sealing performance of the oil seal of the piston 44 is further improved. In addition, the arrangement of the through hole 32 is also beneficial to reducing the eccentric action of the eccentric section 31, reducing the centrifugal action in the rotating process of the eccentric section 31 and improving the running stability of the compressor.

In some embodiments, the thickness dimension of the eccentric section 31 in the axial direction of the crankshaft 3 is smaller than the thickness dimension of the piston 44 in the axial direction of the crankshaft 3, the eccentric section 31, the piston 44 and the first shaft plate 41 enclose a first cavity 49, the eccentric section 31, the piston 44 and the second shaft plate 42 enclose a second cavity 410, and the first cavity 49 and the second cavity 410 are located on two opposite sides of the eccentric section 31.

Specifically, as shown in fig. 3, the thickness dimension of the eccentric section 31 in the up-down direction is smaller than the thickness dimension of the piston 44 in the up-down direction, and the eccentric section 31 is provided substantially at the middle position of the piston 44, whereby a first chamber 49 is defined between the upper end surface of the eccentric section 31, the upper end inner peripheral wall of the piston 44, and the first shaft plate 41, and a second chamber 410 is defined between the lower end surface of the eccentric section 31, the lower end inner peripheral wall of the piston 44, and the second shaft plate 42. The first chamber 49 and the second chamber 410 have an effect of storing the lubricant 12, so that more lubricant 12 is always stored in the piston 44, and an oil sealing effect of the piston 44 is further ensured.

It is understood that in other embodiments, the upper end surface of the eccentric section 31 may be substantially flush with the upper end surface of the piston 44, and the lower end surface of the eccentric section 31 may be substantially flush with the lower end surface of the piston 44, that is, the eccentric section 31 and the piston 44 only enclose the first cavity 49 or the second cavity 410.

In some embodiments, the compressor is a vertical compressor, the first shaft plate 41 is located above the second shaft plate 42, the oil supply hole 45 is provided on the second shaft plate 42, and the oil supply hole 45 communicates with the second cavity 410. Specifically, as shown in fig. 3, when the compressor is a vertical compressor, the oil supply hole 45 may be provided only in the second shaft plate 42, and the oil supply hole 45 is low in elevation, thereby ensuring the suction amount of the lubricating oil 12 in the piston 44.

In some embodiments, as shown in fig. 3, the oil supply hole 45 may be arranged along a radial horizontal extension of the second axial plate 42.

In some embodiments, the oil supply hole 45 is arranged obliquely with respect to the horizontal direction, and an inlet of the oil supply hole 45 is lower than an outlet of the oil supply hole 45. Specifically, as shown in fig. 6, the oil supply hole 45 may be arranged to extend obliquely, whereby the inlet of the oil supply hole 45 can be provided at a lower position, thereby ensuring that the inlet of the oil supply hole 45 is always located below the liquid level of the lubricating oil 12, ensuring the supply amount of the lubricating oil 12 in the piston 44.

In some embodiments, a conduit is provided on the second shaft plate 42, the lumen of the conduit is in communication with the oil supply hole 45, and the inlet of the conduit is lower than the outlet of the conduit. Specifically, a conduit may be integrally provided on the second shaft plate 42, the conduit may be regarded as an extension of the oil supply hole 45, and the conduit may extend deeper into the lubricating oil 12, whereby the supply of the lubricating oil 12 in the piston 44 is further ensured.

In some embodiments, the first shaft plate 41 is provided with a first circular groove 411, the second shaft plate 42 is provided with a second circular groove 421, the first circular groove 411 and the second circular groove 421 both surround the periphery of the crankshaft 3, the first circular groove 411 is communicated with the first cavity 49, the second circular groove 421 is communicated with the second cavity 410, and the oil supply hole 45 of the second shaft plate 42 is communicated with the second cavity 410 through the second circular groove 421.

As shown in fig. 3 and 6, the first circular groove 411 is disposed on a side of the first shaft plate 41 facing the cylinder 43, the second circular groove 421 is disposed on a side of the second shaft plate 42 facing the cylinder 43, both the first circular groove 411 and the second circular groove 421 are annular grooves and both surround the outer periphery of the crankshaft 3, when the compressor is a vertical compressor, an opening of the first circular groove 411 is downward and is communicated with the first cavity 49, an opening of the second circular groove 421 is upward and is communicated with the second cavity 410, the first circular groove 411 and the second circular groove 421 have an effect of storing the lubricating oil 12 on one hand, and on the other hand, can increase the supply of the lubricating oil 12 to the crankshaft 3, which is beneficial to improving the lubricating performance of the crankshaft 3.

When the compressor is a vertical compressor, the oil supply hole 45 is provided in the second shaft plate 42, and an outlet of the oil supply hole 45 communicates with the second annular groove 421. The lubricating oil 12 can be supplied into the piston 44 through the oil supply hole 45 and the second annular groove 421 in this order.

In some embodiments, the compressor is a vertical compressor, a shaft center hole 33 is formed in the crankshaft 3, an inlet of the shaft center hole 33 is formed at a bottom end of the crankshaft 3, the shaft center hole 33 extends in an axial direction of the crankshaft 3 and penetrates through the eccentric section 31, an oil groove 311 is formed on an outer peripheral side of the eccentric section 31, and the oil groove 311 is communicated with the shaft center hole 33 through an oil hole 312.

Specifically, as shown in fig. 4 and 5, a shaft center hole 33 is provided in the crankshaft 3, the shaft center hole 33 extends in the axial direction of the crankshaft 3, the shaft center hole 33 may be a stepped hole, the bottom of the shaft center hole 33 is open, and the bottom opening of the shaft center hole 33 protrudes into the lubricating oil 12. The oil groove 311 is disposed on an outer circumferential side of the eccentric section 31, the oil groove 311 may extend in a thickness direction of the eccentric section 31, a plurality of oil holes 312 are further provided in the crankshaft 3, the oil holes 312 extend in a radial direction of the crankshaft 3, and one of the oil holes 312 communicates the shaft center hole 33 with the oil groove 311. When the crankshaft 3 rotates, the lubricating oil 12 enters the shaft central hole 33 and then flows into the oil groove 311 via the oil hole 312 in the eccentric section 31, and the oil groove 311 has an effect of storing the lubricating oil 12, thereby ensuring the lubricating effect of the eccentric section 31. The lubricating oil 12 may directly flow to the outer peripheral wall of the crankshaft 3 through the remaining oil holes 312, thereby enhancing the lubrication of the outer peripheral wall of the crankshaft 3. The provision of the shaft center hole 33 can also serve to replenish the piston 44 with the lubricating oil 12.

Preferably, a spiral plate 331 is provided in the shaft center hole 33, the spiral plate 331 extends spirally in the up-down direction, and the spiral plate 331 has a guide effect to suck more lubricant 12 into the shaft center hole 33 when the crankshaft 3 rotates.

In some embodiments, the crankshaft 3 is provided with an air hole 34, the air hole 34 is located above the first shaft plate 41, and the shaft center hole 33 communicates with the inner cavity of the housing 1 through the air hole 34. Specifically, as shown in fig. 3 to 5, the air hole 34 is provided in the crankshaft 3, the air hole 34 extends in the radial direction of the crankshaft 3, the air hole 34 is located above the first shaft plate 41, and the shaft center hole 33 can be communicated with the inner cavity of the housing 1 through the air hole 34, so that the air pressure balance between the shaft center hole 33 and the inner cavity of the housing 1 is maintained, and the lubricating oil 12 is conveniently sucked into the shaft center hole 33.

In some embodiments, the cylinder 43 includes a plurality of sub-cylinders 43, the piston 44 includes a plurality of sub-pistons 44, the plurality of sub-pistons 44 are disposed in the compression cavities 431 of the plurality of sub-cylinders 43 in a one-to-one correspondence, the plurality of sub-cylinders 43 are sandwiched between the first shaft plate 41 and the second shaft plate 42, two adjacent sub-cylinders 43 are spaced apart by a partition plate 48, a central hole 481 is disposed on the partition plate 48, the crankshaft 3 passes through the central hole 481, and the central hole 481 is used for communicating inner holes of two adjacent sub-pistons 44.

Specifically, the compressor may be a two-cylinder compressor or a multi-cylinder compressor, and as shown in fig. 7, the cylinder 43 of the compression cylinder assembly 4 may include two sub-cylinders 43, the two sub-cylinders 43 are a first cylinder 432 and a second cylinder 433, respectively, the first cylinder 432 and the second cylinder 433 are sandwiched between the first shaft plate 41 and the second shaft plate 42, and the first cylinder 432 and the second cylinder 433 are spaced apart by a partition plate 48. In correspondence with the cylinder 43, the piston 44 may also comprise two sub-pistons 44, the two sub-pistons 44 being respectively a first piston 441 and a second piston 442, wherein the first piston 441 is fitted in the compression chamber 431 of the first cylinder 432 and the second piston 442 is fitted in the compression chamber 431 of the second cylinder 433. Two eccentric sections 31 on the crankshaft 3 are correspondingly provided, and the two eccentric sections 31 are respectively a first eccentric section 313 and a second eccentric section 314, wherein the first piston 441 is sleeved on the outer peripheral side of the first eccentric section 313, and the second piston 442 is sleeved on the outer peripheral side of the second eccentric section 314.

Preferably, the through holes include a first through hole 321 and a second through hole 322, wherein the first through hole 321 is provided on the first eccentric section 313, and the second through hole 322 is provided on the second eccentric section 314.

The diaphragm 48 is annular, a center hole 481 is provided in the diaphragm 48, the inner wall of the center hole 481 is arranged with clearance from the outer peripheral wall of the crankshaft 3, and the center hole 481 in the diaphragm 48 communicates the inner hole of the second piston 442 with the inner hole of the second piston 442, whereby the lubricating oil 12 introduced into the inner hole of the second piston 442 can flow into the inner hole of the first piston 441 via the center hole 481 in the diaphragm 48. This realizes replenishment of the lubricating oil 12 to the plurality of pistons 44.

A refrigeration system according to an embodiment of the present invention is described below.

According to the utility model discloses refrigerating system includes blast pipe 7, condenser 8, evaporimeter 10, expansion device 9, reservoir 11, breathing pipe 6 and compressor, and the compressor can be for the compressor that describes in the above-mentioned embodiment, and blast pipe 7 communicates with casing 1's inner chamber, and breathing pipe 6 communicates with compression chamber 431, and condenser 8, evaporimeter 10, expansion device 9, reservoir 11 communicate between blast pipe 7 and breathing pipe 6.

Specifically, as shown in fig. 1, the discharge pipe 7 is provided at the top end of the casing 1, and the suction pipe 6 is provided at the bottom of the casing 1 and communicates with the compression chamber 431 of the cylinder 43. The exhaust pipe 7 and the intake pipe 6 are connected to each other through a circulation line, and the condenser 8, the expansion device 9, the evaporator 10, and the liquid reservoir 11 are connected to the circulation line in this order in the direction from the exhaust pipe 7 to the intake pipe 6.

The gas sucked by the gas suction pipe 6 can be compressed into high-temperature and high-pressure gas through the compression cylinder assembly 4, then sequentially flows through the silencer 5 and the motor assembly 2, finally flows into the gas discharge pipe 7, and finally achieves the refrigeration effect through the condenser 8, the expansion device 9 and the evaporator 10. The accumulator 11 has the function of storing non-evaporated liquid refrigerant.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, 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 implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless expressly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (12)

1. A compressor, comprising:

the lubricating oil pump comprises a shell, a pump body and a pump body, wherein the shell is provided with an inner cavity, and lubricating oil is stored in the inner cavity;

the motor assembly and the crankshaft are arranged in the shell, the crankshaft is connected with the motor assembly, the motor assembly is used for driving the crankshaft to rotate, and the crankshaft comprises an eccentric section;

compression cylinder subassembly, the compression cylinder subassembly is established in the casing, the compression cylinder subassembly includes cylinder, first axletree board, second axletree board and piston, the cylinder is established first axletree board with between the second axletree board, be equipped with the compression chamber in the cylinder, the bent axle passes the cylinder first axletree board the second axletree board and with first axletree board second axletree board normal running fit, the cooperation of eccentric section is in the compression chamber, the piston cover is established the periphery side of eccentric section is located in the compression chamber, first axletree board with be equipped with the oil feed hole on at least one of second axletree board, the oil feed hole is used for supplying the lubricating oil extremely in the hole that the internal perisporium of piston encloses.

2. The compressor of claim 1, wherein the eccentric section is provided with a through hole extending in an axial direction of the crankshaft and penetrating the eccentric section, the through hole being for the lubricant oil on one side of the eccentric section to flow to the other side of the eccentric section.

3. The compressor of claim 2, wherein a thickness dimension of the eccentric section in the axial direction of the crankshaft is smaller than a thickness dimension of the piston in the axial direction of the crankshaft.

4. The compressor of claim 3, wherein the eccentric section, the piston, and the first shaft plate enclose a first cavity, the eccentric section, the piston, and the second shaft plate enclose a second cavity, and the first cavity and the second cavity are located on opposite sides of the eccentric section.

5. The compressor of claim 4, wherein the compressor is a vertical compressor, the first shaft plate is positioned above the second shaft plate, the oil supply hole is provided in the second shaft plate, and the oil supply hole communicates with the second cavity.

6. The compressor of claim 5, wherein the oil supply hole is arranged obliquely with respect to a horizontal direction, and an inlet of the oil supply hole is lower than an outlet of the oil supply hole.

7. The compressor of claim 5, wherein a conduit is provided on the second shaft plate, a lumen of the conduit is communicated with the oil supply hole, and an inlet of the conduit is lower than an outlet of the conduit.

8. The compressor of claim 5, wherein the first shaft plate is provided with a first annular groove, the second shaft plate is provided with a second annular groove, the first annular groove and the second annular groove both surround the periphery of the crankshaft, the first annular groove is communicated with the first cavity, the second annular groove is communicated with the second cavity, and the oil supply hole in the second shaft plate is communicated with the second cavity through the second annular groove.

9. The compressor according to claim 1, wherein the compressor is a vertical compressor, a shaft center hole is formed in the crankshaft, an inlet of the shaft center hole is formed in a bottom end of the crankshaft, the shaft center hole extends in an axial direction of the crankshaft and passes through the eccentric section, and an oil groove is formed on an outer peripheral side of the eccentric section and communicates with the shaft center hole through an oil hole.

10. The compressor of claim 9, wherein the crankshaft has an air hole located above the first shaft plate, and the shaft bore communicates with the interior cavity of the housing through the air hole.

11. The compressor of any one of claims 1 to 10, wherein the cylinder includes a plurality of sub-cylinders, the piston includes a plurality of sub-pistons, the plurality of sub-pistons are disposed in compression chambers of the plurality of sub-cylinders in a one-to-one correspondence, the plurality of sub-cylinders are sandwiched between the first shaft plate and the second shaft plate, and two adjacent sub-cylinders are spaced apart by a partition plate, the partition plate is provided with a central hole, the crankshaft passes through the central hole, and the central hole is used for communicating inner holes of two adjacent sub-pistons.

12. A refrigeration system comprising an exhaust pipe, a condenser, an evaporator, an expansion device, a reservoir, an air intake pipe and a compressor, wherein the compressor is a compressor according to any one of claims 1 to 11, the exhaust pipe communicates with an inner cavity of the shell, the air intake pipe communicates with the compression chamber, and the condenser, the evaporator, the expansion device and the reservoir communicate between the exhaust pipe and the air intake pipe.

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