CN217682188U

CN217682188U - Piston cylinder, compressor and refrigeration equipment

Info

Publication number: CN217682188U
Application number: CN202220604626.3U
Authority: CN
Inventors: 戚斐斐; 刘建如; 张奎; 迟华龙
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-10-28
Anticipated expiration: 2032-03-18

Abstract

The utility model discloses a piston cylinder, a compressor and refrigeration equipment, wherein, the piston cylinder comprises a cylinder body with a piston cavity, a cylinder body oil inlet branch channel and a cylinder body oil outlet branch channel which are arranged on the cylinder body, the cylinder body oil inlet branch channel and the cylinder body oil outlet branch channel are both communicated with the piston cavity; the cylinder body oil inlet branch channel is arranged on a cylinder body and is provided with an oblique perforation and a radial oil hole which is communicated with the oblique perforation and extends along the radial direction of the cylinder body, the extending direction of the oblique perforation is oblique to the axial direction of the cylinder body, an inlet of the oblique perforation is arranged on the inner wall of the piston cavity, an outlet of the oblique perforation is arranged on the front end surface of the cylinder body, the piston cylinder is also provided with a plugging piece which is arranged in the oblique perforation, and the plugging piece is positioned between the inlet of the oblique perforation and the outlet of the oblique perforation. The utility model discloses made things convenient for the setting of cylinder body oil outlet channel, and because the export of cylinder body oil outlet channel is for the radial direction open-ended along the cylinder body also more convenient butt joint when with the butt joint of support oil outlet channel.

Description

Piston cylinder, compressor and refrigeration equipment

Technical Field

The utility model relates to a compressor technical field, especially piston cylinder, compressor and refrigeration plant.

Background

A compressor is a mechanical device that compresses and raises the pressure of air, refrigerant, or other various working gases by receiving power from a power generation device such as an electric motor or a turbine. Compressors are widely used in household appliances such as refrigerators and air conditioners or in the entire industrial field.

A reciprocating compressor in which a compression space for sucking or discharging a working gas is formed between a piston and a piston cylinder, and the piston is linearly reciprocated inside the piston cylinder to compress a refrigerant; a linear compressor capable of improving compression efficiency and simplifying an overall structure without a mechanical loss due to motion conversion by directly connecting a piston to a linear reciprocating driving motor has been extensively developed in a reciprocating compressor.

In the linear compressor, a piston is linearly reciprocated inside a piston cylinder by a linear motor located inside a hermetic case, for sucking, compressing and discharging a refrigerant. In the above process, in order to ensure the stability of the movement of the piston in the piston cylinder, lubricating oil needs to be supplied to the piston cylinder, the lubricating oil generally remains at the bottom of the inner cavity and is supplied to the piston cylinder through an oil supply device such as an oil pump and the like to lubricate the piston, and part of the used lubricating oil is finally discharged into the inner cavity through an oil delivery pipe.

In the prior art, a cylinder body of a piston cylinder is generally positioned on a cylinder body support along the transverse direction, a cylinder body oil inlet channel and a cylinder body oil outlet channel are generally arranged on the cylinder body of the piston cylinder for conveniently supplying oil to a piston cavity, meanwhile, a support oil inlet channel and a support oil outlet channel which are matched with the cylinder body oil inlet channel and the cylinder body oil outlet channel are arranged on the cylinder body support, and an outlet of the cylinder body oil outlet channel is butted with an inlet of the support oil outlet channel so as to realize the communication of the cylinder body oil inlet channel and the support oil outlet channel. In order to provide enough activity space for the piston in the prior art, the oil inlet of the oil outlet channel of the cylinder body and the outlet of the oil outlet channel of the support are generally deviated from each other in the transverse direction.

In order to meet the requirements, the cylinder body oil outlet channel is generally an inclined hole formed in the side wall of the cylinder body, the support oil outlet channel generally also comprises the inclined hole formed in the support of the cylinder body, and the inclined hole not only increases the difficulty of machining and manufacturing, but also increases the difficulty of butt joint when the support oil outlet channel is in butt joint with the cylinder body oil outlet channel, so that inconvenience is brought to assembly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a piston cylinder to solve not enough among the prior art, its setting through interface channel can be convenient realize the setting of cylinder body oil outlet channel on the cylinder body, and conveniently realized with the butt joint of the oil outlet channel on the support body.

The utility model provides a piston cylinder, include: the cylinder body oil inlet branch channel and the cylinder body oil outlet branch channel are arranged on the cylinder body, and are both communicated with the piston cavity;

the cylinder body oil inlet branch channel is arranged on the cylinder body and is provided with an oblique perforation and a radial oil hole which is communicated with the oblique perforation and extends along the radial direction of the cylinder body, the extending direction of the oblique perforation is obliquely crossed with the axial direction of the cylinder body, the inlet of the oblique perforation is arranged on the inner wall of the piston cavity, the outlet of the oblique perforation is arranged on the front end surface of the cylinder body, the piston cylinder is also provided with a plugging piece which is arranged in the oblique perforation, and the plugging piece is positioned between the inlet of the oblique perforation and the outlet of the oblique perforation.

As a further improvement, the cylinder body is provided with an oil groove on the inner wall, the oblique perforated inlet with the oil groove intercommunication is crossed, the cylinder body oil inlet passageway with the oil groove intercommunication is crossed.

As a further improvement, the cylinder body is specifically along the section of reducing thickness, changeover portion and the section of thickening that axial direction set up side by side, radial oilhole sets up the section of thickening.

As a further improvement of the utility model, the slant is perforated and is set up the changeover portion with thickening section.

The utility model also discloses a compressor, which comprises the piston cylinder, a cylinder body bracket for positioning and supporting the piston cylinder and a piston reciprocating in the piston cavity to compress the refrigerant entering the piston cavity;

the cylinder body support is provided with a support oil inlet branch channel communicated with the cylinder body oil inlet channel and a support oil outlet branch channel communicated with the cylinder body oil outlet channel, and the support oil outlet branch channel is opposite to the radial oil hole and extends in the radial direction of the cylinder body.

As a further improvement of the utility model, the cylinder body is in along the setting of horizontal direction extension and location on the cylinder body support, the lateral wall in piston chamber has top and bottom, and cylinder body oil feed passageway sets up the bottom of piston chamber lateral wall, the cylinder body passageway that produces oil sets up the top of piston chamber lateral wall.

As a further improvement of the utility model, the piston cylinder still has to support tightly the cylinder cap of terminal surface before the cylinder body, the cylinder cap has the cylinder cap body and sets up annular crimping portion on the cylinder cap body, annular crimping portion butt is in just part on the cylinder body annular crimping portion butt is in on the cylinder body support.

As a further improvement, the annular crimping portion and still be provided with the sealing washer between the cylinder body, be provided with the sealing washer constant head tank that is used for positioning seal circle on the cylinder body.

As a further improvement of the utility model, the cylinder body bracket comprises a bracket body and a mounting bracket arranged on the bracket body, and the mounting bracket is used for mounting and fixing the bracket body; the bracket body is provided with a positioning hole matched with the cylinder body; the cylinder body is provided with a thickening section, the radial oil hole is formed in the thickening section, and the thickening section is opposite to the support body after the cylinder body is installed and fixed.

The utility model also discloses a refrigeration plant, including box and the refrigerating system of setting on the box, refrigerating system includes the compressor.

Compared with the prior art, the utility model discloses set the oil outlet channel of cylinder body to the slant perforation and with the radial oilhole of slant perforation intercommunication to set up the fenestrate export of slant on the preceding terminal surface of cylinder body, then carry out the shutoff to the one end that the slant perforation is close to preceding terminal surface through the shutoff piece, made things convenient for the setting of cylinder body oil outlet channel, and because the export of cylinder body oil outlet channel is for the radial direction open-ended along the cylinder body also more convenient butt joint when with support oil outlet channel butt joint.

Drawings

Fig. 1 is a schematic view of a mounting structure of a piston cylinder in a shell of a compressor disclosed in an embodiment of the invention;

fig. 2 is a schematic view of an assembly structure of a piston cylinder and a heat sink of the compressor disclosed in the embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of a piston cylinder of a compressor and a heat sink after being assembled according to an embodiment of the present invention;

fig. 4 is a schematic view of the internal structure of a piston cylinder of a compressor after installation, which is disclosed by the embodiment of the invention;

fig. 5 is a schematic view of a split internal structure of the compressor disclosed in the embodiment of the present invention;

fig. 6 is a schematic structural diagram of an assembled piston cylinder and cylinder head cover of the compressor disclosed in the embodiment of the present invention;

fig. 7 is an exploded view of the piston cylinder and cylinder head cover assembly of the compressor disclosed in the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a compressor according to an embodiment of the present invention after assembling a valve body and a cylinder cover;

fig. 9 is a first structural schematic diagram of a cylinder cover of the compressor disclosed in the embodiment of the present invention;

fig. 10 is a second schematic structural diagram of a cylinder head of a compressor disclosed in an embodiment of the present invention;

fig. 11 is a first structural schematic diagram of a cylinder head cover of a compressor disclosed in an embodiment of the present invention;

fig. 12 is a second structural schematic diagram of a cylinder head cover of the compressor disclosed by the embodiment of the invention;

fig. 13 is a schematic view of a mounting structure of a cylinder body of a compressor on a cylinder body bracket according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a cylinder body disclosed in the embodiment of the present invention;

description of reference numerals: 1-shell, 11-inner chamber

2-piston cylinder, 21-piston cavity, 22-cylinder body, 221-oil passing groove, 222-cylinder body oil outlet branch channel, 2221-radial oil hole, 2222-oblique oil hole, 223-cylinder body oil inlet branch channel, 224-sealing ring positioning groove, 225-thinning section, 226-thickening section, 227-transition section,

23-cylinder cover, 230-discharge groove, 231-cylinder cover connecting hole, 232-cylinder cover body, 2321-bottom wall, 2322-annular side wall, 233-annular crimping part, 234-mounting part,

24-a discharge cavity, 25-a closure,

4-cylinder body support, 41-support oil outlet branch channel, 411-vertical oil outlet hole, 42-transition channel, 43-vertical oil outlet pipe, 44-downstream connecting pipe, 45-annular groove, 46-support body, 460-positioning hole, 461-avoiding recess, 47-mounting support,

5-a discharge valve, 51-a valve body, 52-a return spring,

6-discharge channel, 61-discharge pipe, 62-discharge pipe connection,

7-cylinder head cover, 70-flow cavity, 71-flow outlet, 72-cover, 721-cover bottom, 722-cover wall, 73-cover groove, 74-gap, 75-fitting, 76-cover mounting, 761-crimping plate, 762-positioning edge, 77-connecting part,

8-radiating piece, 81-radiating body, 82-radiating channel, 9-connecting channel and 10-oil supply device.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. 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.

The embodiment of the utility model discloses a compressor, this compressor be applied to in the refrigeration plant as refrigerating system's partly, the compressor connect with evaporimeter and condenser between be used for compressing into the highly compressed gas of high temperature with the secondary refrigerant that the evaporimeter came out, then enter into the condenser and cool off.

Specifically, as shown in fig. 1 to 12, the compressor includes: the piston-cylinder type hydraulic cylinder comprises a shell 1 with an inner cavity 11, a piston cylinder 2 arranged in the inner cavity 11, a piston arranged in the piston cylinder 2 in a sliding mode and a cylinder body bracket 4 arranged in the inner cavity 11; the cylinder body bracket 4 is used for positioning and supporting the piston cylinder 2;

the piston cylinder 2 includes a cylinder block 22 having a piston chamber 21, and a cylinder head 23 provided at one end of the cylinder block 22, and the piston reciprocates in the piston chamber 21 to compress refrigerant entering the piston chamber 21. The cylinder 22 extends along the transverse direction and is positioned and supported on the cylinder bracket 4, and the piston linearly reciprocates along the transverse direction to realize the compression of the refrigerant. In a specific embodiment, a refrigerant inlet hole (not shown) into the piston cavity 21 may be provided on the piston, and the refrigerant is introduced into the piston cavity 21 through the refrigerant inlet hole.

As shown in fig. 13 to 14, in the present embodiment, the cylinder block 22 has a thinning section 225, a thickening section 226, and a transition section 227 arranged side by side in the axial direction, the transition section 227 is located between the thinning section 225 and the thickening section 226, and a block step surface 228 is formed between the thickening section 226 and the transition section 227;

the cylinder bracket 4 comprises a bracket body 46 and a mounting bracket 47 arranged on the bracket body 46, wherein the mounting bracket 47 is used for mounting and fixing the bracket body 46. The bracket body 46 is provided with a positioning hole 460 matched with the cylinder body, and the thickened section 226 is opposite to the bracket body 46 after the cylinder body 22 is installed and fixed.

As shown in fig. 3 to 4, the compressor further has a discharge valve 5, the discharge valve 5 has a valve body 51 disposed at one end of the cylinder block 22, the valve body 51 is covered in the cylinder cover 23 and forms a discharge cavity 24 between the valve body 51 and the cylinder cover 23, and the valve body 51 has a closed state abutting against and fixed on the cylinder block 22 to close the piston cavity 21 and an open state communicating the piston cavity 21 and the discharge cavity 24. The refrigerant compressed by the piston in the piston chamber 21 at the time of the open state is discharged from the piston chamber 21 to the discharge cavity 24, and finally discharged out of the compressor through the discharge passage 6 communicating with the discharge cavity 24 (shown in fig. 2).

Specifically, the valve body 51 is opposite to the piston cavity 21 and has a shape matched with the piston cavity, and one side of the valve body 51 opposite to the cylinder 22 has a circular structure. And the size of the valve body 51 is larger than that of the opening of the piston chamber 21 so that the valve body 51 forms a sealing cover for the opening of the piston chamber 21 in the closed state;

in this embodiment, the valve body 51 is pushed away from the cylinder 22 by the high-pressure gas in the piston chamber 21 to communicate the piston chamber 21 with the discharge cavity 24, thereby placing the valve body 51 in an open state.

As shown in fig. 7 to 8, in order to conveniently realize the reset of the valve body 51 after opening, the exhaust valve 5 further has a reset spring 52, the reset spring 52 is disposed between the valve body 51 and the cylinder cover 23, two ends of the reset spring 52 are respectively positioned and supported on the valve body 51 and the cylinder cover 23, the valve body 51 compresses the reset spring 52 to enable the reset spring 52 to accumulate potential energy during the opening of the valve body 51, and the valve body 51 automatically resets under the action of the reset spring 52 after the external force driving the valve body 51 to open is removed.

In order to conveniently realize the installation and fixation of the valve body 51 on the cylinder cover 23, a positioning column matched with the return spring 52 is arranged on the valve body 51, and the return spring 52 is sleeved outside the positioning column and is in interference fit with the positioning column. Correspondingly, the cylinder cover 23 is also provided with a positioning column matched with the return spring 52, it can be understood that the return spring 52 is fixed at the central position of the valve body 51, and the return spring 52 has a cylindrical structure.

When the piston moves towards the direction close to the valve body 51, when the air pressure in the piston cavity 21 is low and is not enough to overcome the pushing force of the return spring 52, the valve body 51 is in a closed state, and at the moment, the valve body 51 is abutted against the cylinder 22 under the pushing action of the return spring 52;

when the air pressure in the piston chamber 21 is sufficiently compressed, the air pressure in the piston chamber 21 pushes the valve body 51 to move away from the cylinder 22 to open the valve body 51, so that the refrigerant compressed in the piston chamber 21 is discharged to the discharge cavity 24 and then discharged out of the compressor through the discharge passage 6 communicating with the discharge cavity 24. When the air pressure in the piston chamber 21 is reduced, the left and right lower valve bodies 51 of the return spring 52 are pressed against the cylinder 22 again to form a closed state.

As shown in fig. 2, the compressor further has a discharge passage 6 communicated with the discharge cavity 24, the discharge passage 6 includes a discharge pipe 61 and a discharge pipe connector 62, a cylinder head connection hole 231 adapted to the discharge pipe connector 62 is provided on the cylinder head 23, and the cylinder head connection hole 231 is communicated with the discharge cavity 24. The discharge passage 6 leads the high-temperature and high-pressure refrigerant compressed in the discharge cavity 24 out of the compressor and is delivered to the condenser through the discharge pipe 61.

The compressor is also provided with an oil inlet channel and an oil outlet channel, wherein the oil inlet channel is communicated with the piston cavity 21 and is used for supplying oil to a gap between the cylinder body 22 and the piston; the oil outlet passage communicates with the piston chamber 21 to discharge the lubricating oil in the piston chamber 21.

As shown in fig. 3 and 5, in order to facilitate the circulation of the lubricating oil, the compressor further has an oil supply device 10 disposed in the inner cavity 11, the oil inlet channel is communicated with the oil supply device 10 and the piston cavity 21, an inlet of the oil supply device 10 is communicated with the inner cavity 11, the lubricating oil is disposed at the bottom of the inner cavity of the housing 1, and under the action of the oil supply device 10, the lubricating oil enters the piston cavity 21 through the oil inlet channel, and is discharged through the oil outlet channel after the gap between the piston and the cylinder 22 is lubricated by the oil supply. Since the lubricant is generally placed directly in the inner cavity 11 of the housing 1, the oil supply device 10 is arranged on the underside of the piston cylinder 2 and between the piston cylinder 2 and the bottom of the housing 1.

The cylinder body 22 is located be provided with oil groove 221 on the inside wall of piston chamber 21, it sets up to cross oil groove 221 in the activity stroke of piston, cross oil groove 221 in the piston activity in-process always with the piston position relative, the oil feed passageway with the passageway that produces oil all with cross oil groove 221 intercommunication set up the flow of realization lubricating oil that oil groove 221 can be better on the inside wall of cylinder body 22, and the realization that also can be better is to the lubrication in clearance between piston and the cylinder body 22.

As shown in fig. 4, in order to better lubricate the side wall of the piston, the outlet of the oil inlet channel and the inlet of the oil outlet channel are oppositely arranged at two opposite sides of the piston cavity 21, because the cylinder body 22 is arranged along the transverse direction, the piston cavity 21 of the cylinder body 22 penetrates along the transverse direction, the side wall of the piston cavity 21 has a top and a bottom, the outlet of the oil inlet channel is arranged at the bottom of the inner wall of the piston cavity 21, and the inlet of the oil outlet channel is arranged at the top of the inner wall of the piston cavity 21. The arrangement of the structure enables lubricating oil to enter from the bottom of the piston cavity 21 and then be discharged from the top of the piston cavity 21, and the lubricating oil can fully flow in the piston cavity 21, so that the movement of the piston is better lubricated.

In the prior art, the lubricating oil discharged through the oil outlet channel is directly injected into the inner cavity 11, then is gathered at the bottom of the inner cavity 11, is sucked by the oil supply device 10 again, and then enters the piston cavity 21 through the oil inlet channel for recycling. The design of above-mentioned structure can not effectually be cooled down to lubricating oil to make the lubricating oil temperature higher, higher lubricating oil temperature influences the result of use of lubricating oil easily.

As shown in fig. 1 to 3, in order to better cool down the lubricating oil, in this embodiment, the compressor further has a heat sink 8, where the heat sink 8 has a heat sink body 81 and a heat sink channel 82 disposed on the heat sink body 81, and the heat sink 8 releases heat in the heat sink channel 82 to the outside of the housing through the housing 1; when the lubricating oil flows through the heat dissipation channel 82, the heat of the lubricating oil is dissipated to the outside of the compressor through the shell 1, so that the cooling of the lubricating oil is realized. In this embodiment, a heat sink opening toward the housing is formed on the heat dissipation body 81, and the heat sink is attached to the housing 1 to form the heat dissipation channel 82 between the heat dissipation body 81 and the housing 1.

Since the lubricating oil needs to be delivered into the heat dissipation passage 82 of the heat dissipation member 8 for heat dissipation, the oil outlet passage communicating with the piston chamber 21 communicates with the heat dissipation passage 82. Because the arrangement of the heat sink 8 increases the loop for returning the lubricating oil to the inner cavity 11, the increase of the loop inevitably causes the lubricating oil to flow unsmoothly in the oil outlet channel, and particularly after the high-pressure gas in the piston cavity 21 is mixed in the oil outlet channel, the high-pressure gas can block the pushing action of the oil supply device 10 on the lubricating oil, so that the flowing unsmoothly of the lubricating oil is caused.

As shown in fig. 2 to 4, in order to avoid the above problem, the compressor disclosed in the present embodiment further has a connection passage 9, and the connection passage 9 communicates with the oil outlet passage to discharge the high-pressure gas in the oil outlet passage. Through the setting of connect the passageway 9 can be timely discharge the high-pressure gas in the oil duct, and then effectively avoid oil duct to get into the pipeline of heat dissipation channel 82 and have high-pressure gas, and then be favorable to smooth and easy flow of lubricating oil, the better recycle who realizes lubricating oil.

Connecting channel 9 with inner chamber 11 intercommunication and the length of connecting channel 9 self is shorter relatively, and connecting channel 9 communicates the pipeline between the inner chamber 11 also shorter relatively, and the setting up of structure can make in fact that connecting channel 9 can be rapid discharge the lubricating oil that has high-pressure refrigerant in the main entrance to inner chamber 11 like this to can avoid the interior amasss of oil outlet channel to have high-pressure refrigerant, make the more unobstructed of the flow of the lubricating oil in the oil outlet channel. As can be appreciated.

In a specific embodiment, the connecting channel 9 can be regarded as a branch channel connected in parallel with the oil outlet channel, the oil outlet channel specifically includes a main channel and a branch channel communicated with the main channel, the main channel is connected in parallel with the branch channel, the main channel is communicated with the heat dissipation channel to mainly deliver the lubricating oil to the heat dissipation channel of the heat dissipation member, the branch channel is communicated with the inner cavity 11, and the length of the branch channel is relatively short, so as to realize rapid discharge of the refrigerant to the inner cavity 11.

In a specific embodiment, the oil outlet channel generally comprises a counter-flow oil outlet section and a counter-flow oil outlet section, and the flow direction of the fluid in the counter-flow oil outlet section flows from bottom to top in the vertical direction, that is, the gravity of the fluid in the counter-flow oil outlet section needs to be overcome when the fluid flows, and it should be noted that the counter-flow oil outlet section is not necessarily arranged along the vertical direction, and also can be obliquely arranged along the vertical direction or be bent along the vertical direction.

The fluid in the forward flow oil outlet section of the forward flow oil outlet section flows from top to bottom in the vertical direction, that is, the fluid in the forward flow oil outlet section can flow spontaneously under the action of its own gravity, it should be noted that the fluid flowing in the reverse flow oil outlet section and the forward flow oil outlet section is generally the mixture of the lubricating oil and the refrigerant, and most commonly, the gaseous refrigerant is mixed into the lubricating oil. In this embodiment, the connecting channel 9 communicates with the counter flow oil outlet section. Because the countercurrent oil outlet section flows from bottom to top, if high-pressure gas is mixed in the countercurrent oil outlet section, the lubricating oil can flow smoothly, and the connecting channel 9 is communicated with the countercurrent oil outlet section, so that the pressure relief effect can be better realized.

Since the cylinder 22 is positioned on the cylinder bracket 4 and extends in the transverse direction; in the vertical direction, the cylinder 22 is formed with a top wall and a bottom wall which are oppositely arranged;

3-4, the reverse flow oil discharging section comprises a cylinder oil discharging passage 222 arranged on the top wall of the cylinder body, and the oil feeding passage comprises a cylinder oil feeding passage 224 arranged on the bottom wall of the cylinder body; in the vertical direction, the inlet of the cylinder body oil outlet branch passage 222 and the outlet of the cylinder body oil inlet branch passage 223 are respectively located at the upper side and the lower side of the inner wall of the piston cavity 21, and the cylinder body oil outlet branch passage 222 and the cylinder body oil inlet branch passage 224 are both communicated with the oil passing groove 221.

In the vertical direction, the outlet of the cylinder oil outlet passage 222 is arranged at the top of the cylinder 22, and the inlet of the cylinder oil inlet passage 223 is arranged at the bottom of the cylinder 22. Because lubricating oil is carried from inner chamber 11 and enters into the oil feed passageway, consequently set up cylinder body oil feed branch passage 223 and can be better realize carrying lubricating oil in the bottom of cylinder body 22 to make lubricating oil can be complete after being inhaled from the bottom of cylinder body 22 and pass through piston cavity 21, and finally flow out from the top of piston cavity 21, thereby better realization lubricated piston's effect.

The counter-flow oil outlet section is also provided with a bracket oil outlet channel 41 arranged on the cylinder bracket 4; the inlet of the support oil outlet passage 41 is opposite to and communicated with the outlet of the cylinder oil outlet passage 222; the outlet of the support oil outlet channel 41 is arranged at the top of the cylinder support 41.

In the transverse direction, the inlet of the cylinder oil outlet branch passage 222 and the outlet of the cylinder oil outlet branch passage 222 are staggered, the inlet of the cylinder oil outlet branch passage 222 is arranged on one side far away from the cylinder cover 23 relative to the outlet of the cylinder oil outlet branch passage 222, and the inlet of the cylinder oil outlet branch passage 222 is arranged at a position deviated from the cylinder support 4.

When the piston slides in the piston cavity 21, a cavity formed between the piston and the valve body 51 is used as a part of the piston cavity 21 for storing a compression chamber, in order to ensure that the compression chamber has enough space, the sliding stroke range of the piston needs to have a certain distance with the valve body 51, and as the valve body 51 is generally abutted against one end of the cylinder 22, that is, the sliding stroke range of the piston needs to have a certain distance with one end of the cylinder 22. Because the counter-flow oil outlet section is provided with the bracket oil outlet branch channel 41 arranged on the cylinder bracket 4, and the positions of the bracket oil outlet branch channel and the cylinder oil outlet branch channel 222 need to be opposite, the arrangement of the structure can ensure that the width of the cylinder bracket 4 is conveniently communicated with the cylinder oil outlet branch channel 222 on the basis of being narrow.

In the present embodiment, the cylinder oil outlet sub-passage 222 includes a radial oil hole 2221 extending in a radial direction of the cylinder 22 and an oblique oil hole 2222 communicating the radial oil hole 2221 with the piston chamber 21, the oblique oil hole 2222 extending in a direction oblique to an axial direction of the cylinder 22, an opening formed at a top of the cylinder by the radial oil hole 2221 forms an outlet of the cylinder oil outlet sub-passage 222, and an opening formed at an inner wall of the piston chamber 21 by the oblique oil hole 2222 forms an inlet of the cylinder oil outlet sub-passage 222.

Be close to on the cylinder body 22 the one end of cylinder cap 23 is preceding terminal surface, be provided with on the cylinder body 22 along the skew the slant perforation that the axial direction of cylinder body 22 extended to set up is in with the setting shutoff piece 25 in the slant perforation, the fenestrate export of slant sets up on the preceding terminal surface, the fenestrate import of slant sets up on the inner wall of piston chamber 21, shutoff piece and 25 form between the fenestrate import of slant oilhole 2222 of slant.

The above structure can more conveniently form a channel on the cylinder 22, the difficulty of forming a bent aperture on the cylinder 22 is high, in this embodiment, the oblique perforation of the oblique piston cavity 21 is formed on the end surface of the cylinder 22, and one end of the oblique perforation is blocked by the blocking piece 25, so that the processing and forming of the oblique oil hole 2222 are better realized, and then the radial oil hole 2221 and the oblique oil hole 2222 are communicated through the radial oil hole 2221 arranged in the radial direction of the cylinder 22, so that a complete cylinder oil outlet sub-channel is formed on the cylinder 22. Specifically, the radial oil hole 2221 is provided in the thickened section.

The support oil outlet channel 41 comprises a vertical oil outlet hole 411 which extends along the vertical direction, the inlet of the vertical oil outlet hole 411 is opposite to the outlet of the cylinder oil outlet channel 222, and the outlet of the vertical oil outlet hole 411 is positioned at the top of the cylinder support 4;

the cylinder body bracket 4 is also provided with a transition channel 42 for communicating the vertical oil outlet 411 with the connecting channel 9, and the transition channel 42 can be a through hole extending in the direction perpendicular to the vertical oil outlet 411 and extending in the transverse direction.

As shown in fig. 13, in the present embodiment, the transition passage 42 is an annular groove 45 formed between the cylinder block 22 and the cylinder block bracket 4 after the cylinder block 22 is positioned.

After the cylinder cover 23 is installed and fixed, part of the cylinder cover 23 abuts against the cylinder bracket 4 at the same time and covers and seals the annular groove 45. The annular groove 45 is provided between the outer wall of the cylinder 22 and the inner wall of the bracket body 46 and extends in the circumferential direction of the cylinder 22.

An avoiding recess 461 is provided on the bracket body 46 at a position close to the front end face, and the avoiding recess 461 is provided along the edge of the positioning hole 460 and exposed toward the positioning hole 460, the outer wall surface of the cylinder 22 at the position of the rear portion of the cylinder 22 is opposed to the avoiding recess 461 to form an annular groove 45 between the outer wall surface of the cylinder 22 and the avoiding recess 461 of the bracket body 26, and the opening of the annular groove 45 is provided on the front end face;

as shown in fig. 9 to 10, in the present embodiment, the cylinder head 23 includes a cylinder head body 232 and an annular crimping portion 233, the cylinder head body 232 is provided with a discharge groove 230 that is opened toward the piston cavity 21, the annular crimping portion 233 is provided at a notch edge of the discharge groove 230 and abuts against the cylinder body 22, and a sealing ring is further provided at a front end of the annular crimping portion 233 and the cylinder body 22, and the annular crimping portion 233 abuts against the cylinder body 22 to form a covering seal for the discharge groove 230.

In order to facilitate positioning of the sealing ring, a sealing ring positioning groove 224 is further disposed at the front end of the cylinder 22, and the sealing ring positioning groove 224 is adapted to the sealing ring and is used for positioning the sealing ring.

The annular crimp portion 233 described in this embodiment abuts on the cylinder block holder 4 at the same time and covers and seals the annular recess 45, the connection passage 9 is provided on the annular crimp portion 233 at a position opposite to the annular recess 45, and the connection passage 9 penetrates the annular crimp portion 233 in the transverse direction.

The countercurrent oil outlet section also comprises a vertical oil outlet pipe 43 arranged on the vertical oil outlet hole 411, the outlet position of the vertical oil outlet pipe 43 is higher than the inlet of the heat dissipation channel 82 in the vertical direction, the cocurrent oil outlet section comprises a cocurrent connecting pipe 44 which is connected with the outlet of the vertical oil outlet pipe 43 and the inlet of the heat dissipation channel 82, and the height of the cocurrent connecting pipe 44 is gradually reduced along with the flowing direction of the fluid in the cocurrent connecting pipe.

As shown in fig. 3 to 5, in the present embodiment, the outlet of the connecting passage 9 is arranged at the upper side of the cylinder head 23, and the fluid discharged from the connecting passage 9 is used for cooling the cylinder head 23. Because the discharge cavity 24 is formed between the cylinder cover 23 and the valve body 51, the high-temperature and high-pressure refrigerant gas discharged from the piston cavity 21 after the valve body 51 is opened enters the discharge cavity 24, the refrigerant can transfer heat to the cylinder cover 23, the temperature of the cylinder cover 23 is high, and the increase of the temperature of the cylinder cover 23 easily causes the reduction of the compression efficiency of the compressor. In this embodiment, the fluid discharged from the connecting passage 9 cools the cylinder head 23, so as to effectively reduce the temperature of the cylinder head 23, thereby improving the operating efficiency of the compressor.

As shown in fig. 3 and 8, the valve body 51 is disposed to cover the discharge groove 230, the opening size of the discharge groove 230 is larger than the valve body 51, and the discharge groove 230 forms a relief for the valve body 51 when the valve body 51 is opened, and the return spring 52 is positioned at the bottom of the discharge groove 230.

When the valve body 51 is in a closed state, a space formed between the valve body 51 and the groove bottom of the discharge groove 230 is the discharge cavity 24, and the connecting channel 9 is arranged on the annular crimping part 233 and the connecting channel 9 is arranged on the upper side of the cylinder head body 232 in the vertical direction. Because cylinder cap body 232 is the main position that generates heat on the cylinder cap 23, with the upside that the connecting channel set up at cylinder cap body 232 can be better cool down cylinder cap 23.

As shown in fig. 11 and 12, the compressor further includes a head cover 7 covering the outside of the cylinder head 23, and a flow cavity 70 formed between the head cover 7 and the cylinder head 23, the connection passage 9 communicates with the flow cavity 70, and the head cover 7 is provided with a flow outlet hole 71 communicating the flow cavity 70 with the inner cavity 11.

As shown in fig. 3 to 4, the fluid flowing out from the oil outlet passage flows into the flow cavity 70 through the connecting passage 9 and cools the cylinder head 23 while flowing through the flow cavity 70, and the flow outlet hole 71 is used for discharging the fluid in the flow cavity 70.

In the present embodiment, by providing the cylinder head cover 7 on the outer side of the cylinder head 23, the fluid discharged from the connecting channel 9 can only flow along the flow cavity 70, and the cylinder head 23 serves as the inner wall of the flow cavity 70 to enable the lubricating oil to sufficiently contact with the cylinder head 23, so as to better reduce the temperature of the cylinder head 23.

The flow outlet 71 is disposed opposite to the lower side of the cylinder head 23 in the vertical direction. Since the connecting channel 9 entering the flow cavity 7 is arranged on the upper side of the cylinder cover 23, the flow outlet 71 is arranged on the lower side of the cylinder cover 23, so that the fluid entering the flow cavity 70 can exchange heat with the cylinder cover 23 more comprehensively and sufficiently.

In an exemplary embodiment, the head body 232 has a bottom wall 2321 forming a bottom of the discharge groove 230 and an annular side wall 2322 disposed on the bottom wall 2321, and the flow cavity 70 is disposed to extend along an outer side of the annular side wall 2322. The above structure is arranged to make the lubricating oil only flow along the outer circumferential direction of the annular side wall 2322 during the flowing process, that is, the fluid entering the flow cavity 70 from the connecting channel 9 mainly cools the annular side wall 2322, but does not flow through the bottom wall 2321. The arrangement of the structure can accelerate the flow of the fluid, so that the temperature reduction is realized more efficiently.

As shown in fig. 3 to 4, in the present embodiment, the cylinder head cover 7 has a cover body 72, and a cover body groove 73 for accommodating the cylinder head body is formed in the cover body 72; the cover 72 has a cover bottom 721 arranged outside the bottom wall 2321 and adapted to the bottom wall 2321, and a cover wall 722 arranged on the cover bottom 721, the flow cavity 70 is formed between the cover wall 722 and the annular side wall 2322, and the flow outlet 71 is arranged on the cover wall 722. To better block fluid from entering the bottom wall 2321, the cover bottom 721 is pressed against the annular sidewall 2322 at a location where it joins the cover wall 722.

In the vertical direction, the outlet of the connecting channel 9 is arranged on the upper side of the cylinder head body 232, and the flow outlet 71 is oppositely arranged on the lower side of the cylinder head body 232.

In this embodiment the cylinder head cover 7 is the working of plastics, sets up cylinder head cover 7 and covers and establish can play the effect of making an uproar that gives sound insulation outside the cylinder cap 23 be provided with on the cylinder head cover 7 with the space of dodging of discharging channel 6 looks adaptation.

As shown in fig. 11 to 12, the cylinder head connection hole 231 is disposed on the cylinder head body 232 and on the annular side wall 2322, the cylinder head connection hole 231 is opened downward and disposed at the bottom of the annular side wall 2322, and the avoiding space is disposed on the cover body 72, and in this embodiment, the avoiding space is a notch 74 disposed on the cover body 72 and used for exposing the cylinder head connection hole 231 outwards. The recess 74 is adapted to the discharge channel 6 for the passage of the discharge channel 6.

In order to make the cylinder head cover 7 have better sound insulation and noise reduction effects, an attaching part 75 which is matched with the cylinder head 23 and attached to the cylinder head 23 is formed at the edge of the gap 74 in the cover body groove 73; the setting of laminating portion 75 makes the inseparabler laminating of cylinder head cover 7 on cylinder cap 23, avoids appearing outwards exposing the opening of cylinder cap 23 with influence sound insulation and noise reduction effect.

The flow-out openings 71 are provided in two, two of the flow-out openings 71 being provided on opposite sides of the gap 74. Since the flow space 70 is partitioned at the lower position by the abutting portion 75, the two notches 74 are provided to divide the fluid flowing downward from the top of the head body 232 into two paths and flow downward along the two sides of the annular side wall 2322, and the two paths respectively flow outward through the corresponding flow outlet holes 71. It will be appreciated that the flow space 70 can also be filled with a fluid equivalent to a sound-insulating layer between the sound-insulating cover 7 and the cylinder head 23, which provides good sound-insulating and noise-reducing effects.

In this embodiment, in order to more conveniently realize the installation and fixation of the cylinder cover 23, the cylinder cover 23 is installed and fixed on the cylinder body support 4, the annular crimping portion 233 is simultaneously abutted against the cylinder body support 4, and a plurality of installation portions 234 for installing and fixing the cylinder cover 23 are arranged on the annular crimping portion 233.

The cylinder head cover 7 further has a cover mounting portion 76 provided on the cover 72, the cover mounting portion 76 is provided along a notch edge of the cover groove 73 and has a crimping plate 761 attached to the annular crimping portion 233 and a positioning edge 762 provided at an edge of the crimping plate 761, the positioning edge 762 is provided extending from the crimping plate 761 toward the cylinder body 22, and the positioning edge 762 is opposite to a side of the annular crimping portion 233. The positioning edge 762 is arranged to more conveniently realize the positioning of the cylinder cover 7 when the cylinder cover 7 is fixed, and the cylinder cover 7 is positioned at the side of the annular crimping part 233 in an overlapping manner through the positioning edge 762, so that the cylinder cover 7 is convenient to fix.

In this embodiment, the positioning edge 762 extends along one edge of the crimping plate 761. The positioning edge 762 is provided at one turn of the crimping plate 761 and forms a covering of the annular crimping portion 233 together with the crimping plate 761 to better achieve the positioning of the cylinder head cover 7 on the annular crimping portion 233 during the mounting process.

In this embodiment, three mounting portions 234 are provided, and the three mounting portions 234 are disposed in a triangular shape; be provided with on the cover body installation department 76 with installation department 234 one-to-one is used for fixing cylinder head cover 7's connecting portion 77, connecting portion 77 is for setting up connecting hole on the installation department 234 will through fastening bolt cylinder head cover 7 with cylinder head 23 installation is fixed on cylinder body support 4. The three mounting portions 234 in this embodiment can better achieve the mounting and fixing of the cylinder head 23.

When the annular crimping portion 233 abuts against the cylinder support 4, the connecting passage 9 extends in the transverse direction at a position deviating from the cover body mounting portion 76 on the annular crimping portion 233, and the connecting passage 9 communicates with the support oil outlet passage 41.

The utility model discloses another embodiment still discloses a refrigeration plant, including box and the refrigerating system of setting on the box, refrigerating system is including compressor, condenser, throttling arrangement and the evaporimeter of establishing ties in proper order. The compressor is the compressor. The refrigeration equipment provided by the utility model can be a refrigerator, a freezer or a wine cabinet and the like.

The structure, features and effects of the present invention have been described in detail above according to the embodiments shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation range shown in the drawings, and all the modifications made according to the concepts of the present invention or equivalent embodiments modified to the same variations should be within the protection scope of the present invention when the spirit covered by the description and drawings is not exceeded.

Claims

1. A piston cylinder, comprising: the cylinder body oil inlet branch channel and the cylinder body oil outlet branch channel are arranged on the cylinder body, and are both communicated with the piston cavity;

2. The piston cylinder of claim 1, wherein: be provided with on the cylinder body inner wall and cross the oil groove, the fenestrate import of slant with cross the oil groove intercommunication, cylinder body oil feed passageway with cross the oil groove intercommunication.

3. The piston cylinder of claim 1, wherein: the cylinder body is specifically provided with a thinning section, a transition section and a thickening section which are arranged in parallel along the axial direction, and the radial oil hole is arranged in the thickening section.

4. The piston cylinder of claim 3, wherein: the oblique perforations are disposed in the transition section and the thickening section.

5. A compressor comprising a piston cylinder according to any one of claims 1 to 4, a cylinder mount for positionally supporting said piston cylinder, and a piston reciprocating in said piston chamber to compress refrigerant entering said piston chamber;

the cylinder body support is provided with a support oil inlet branch channel communicated with the cylinder body oil inlet channel and a support oil outlet branch channel communicated with the cylinder body oil outlet channel, and the support oil outlet branch channel is opposite to the radial oil hole and extends along the radial direction of the cylinder body.

6. The compressor of claim 5, wherein: the cylinder body extends along the transverse direction and sets up and fix a position on the cylinder body support, the lateral wall in piston chamber has top and bottom, and cylinder body oil feed passageway sets up the bottom of piston chamber lateral wall, the cylinder body passageway that produces oil sets up the top of piston chamber lateral wall.

7. The compressor of claim 5, wherein: the piston cylinder still has to support tightly the cylinder cap of terminal surface before the cylinder body, the cylinder cap has the cylinder cap body and sets up annular crimping portion on the cylinder cap body, annular crimping portion butt is in on the cylinder body and part annular crimping portion butt is in on the cylinder body support.

8. The compressor of claim 7, wherein: the annular crimping part and the cylinder body are further provided with a sealing ring, and the cylinder body is provided with a sealing ring positioning groove for positioning the sealing ring.

9. The compressor of claim 5, wherein: the cylinder body bracket comprises a bracket body and a mounting bracket arranged on the bracket body, and the mounting bracket is used for mounting and fixing the bracket body; the bracket body is provided with a positioning hole matched with the cylinder body; the cylinder body is provided with a thickening section, the radial oil hole is formed in the thickening section, and the thickening section is opposite to the support body after the cylinder body is installed and fixed.

10. A refrigeration appliance, characterized by: comprising a tank and a refrigeration system arranged on the tank, said refrigeration system comprising a compressor according to any one of claims 5-9.