CN114542472B - Rotary compressor and refrigeration equipment - Google Patents

Rotary compressor and refrigeration equipment Download PDF

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Publication number
CN114542472B
CN114542472B CN202210232214.6A CN202210232214A CN114542472B CN 114542472 B CN114542472 B CN 114542472B CN 202210232214 A CN202210232214 A CN 202210232214A CN 114542472 B CN114542472 B CN 114542472B
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China
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oil
sliding vane
cylinder
inner cavity
rotary compressor
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CN114542472A (en
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杜文清
张添
王小龙
聂军
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Guangdong Meizhi Compressor Co Ltd
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Guangdong Meizhi Compressor Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The invention discloses a rotary compressor and refrigeration equipment, wherein the rotary compressor comprises a shell and a compression mechanism, the shell is provided with an oil storage tank, the compression mechanism comprises a cylinder, a sliding vane and a cylinder cover, the cylinder is provided with an inner cavity and a sliding vane groove, the sliding vane is slidably arranged in the sliding vane groove and can slide into the inner cavity, the cylinder cover is arranged on one side of the cylinder along the axial direction, an oil duct is arranged in the cylinder cover, the oil duct is provided with an oil inlet and a plurality of oil outlets, the plurality of oil outlets are arranged at intervals along the length direction of the sliding vane groove, at least part of the oil outlets are positioned in the inner cavity, and when the sliding vane stretches into the inner cavity of the cylinder, the oil duct can supply oil to the part of the sliding vane through the oil outlets positioned in the inner cavity of the cylinder, so that an oil film can still be formed between the part of the sliding vane and the cylinder cover to realize sealing, thereby being capable of reducing the leakage amount of refrigerant from the compression cavity to the air suction cavity through an end face gap between the sliding vane and the cylinder cover, and being beneficial to improving the volumetric efficiency and the heat insulation efficiency of the compressor.

Description

Rotary compressor and refrigeration equipment
Technical Field
The invention relates to the technical field of compressors, in particular to a rotary compressor and refrigeration equipment.
Background
In the related art, a sliding vane of a rotary compressor performs reciprocating inertial motion in a sliding vane groove of a cylinder, and the height of the sliding vane is smaller than that of the cylinder, so that an end gap exists between the sliding vane and upper and lower bearings mounted on both sides of the axial direction of the cylinder, and the end gap is one of main leakage channels of a refrigerant of the compressor. When the compressor operates, lubricating oil flows into the end face clearance under the action of pressure difference, so that the lubrication and sealing effects are achieved. The inner cavity of the air cylinder is divided into a compression cavity and an air suction cavity by the sliding vane and the piston, a large pressure difference exists between the compression cavity and the air suction cavity, when the sliding vane stretches into the inner cavity of the air cylinder, lubricating oil in an end face gap between the sliding vane and a bearing in the inner cavity is sucked into the air suction cavity under the action of the pressure difference between the compression cavity and the air suction cavity, so that the end face gap of the part is difficult to realize sealing through the lubricating oil, and refrigerant gas in the compression cavity is leaked to the air suction cavity in a large amount from the end face gap in the compression and exhaust process, so that the volumetric efficiency and the heat insulation efficiency of the compressor are reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a rotary compressor, which can reduce the amount of refrigerant leaked from a compression cavity to a suction cavity and improve the volumetric efficiency and the heat insulation efficiency of the compressor.
The invention further provides refrigeration equipment with the rotary compressor.
An embodiment of a rotary compressor according to a first aspect of the present invention includes:
a housing having an oil reservoir;
the compression mechanism is arranged in the shell and comprises a cylinder, a sliding vane and a cylinder cover, wherein the cylinder is provided with an inner cavity and a sliding vane groove communicated with the inner cavity, the sliding vane is slidably arranged in the sliding vane groove and can slide into the inner cavity along the length direction of the sliding vane groove, and the cylinder cover is arranged on one side of the cylinder along the axial direction;
the inside of cylinder cap is provided with the oil duct, the oil duct is provided with oil inlet and a plurality of oil-out, the oil inlet with the oil storage pond intercommunication, the oil-out set up in the cylinder cap orientation the one end of gleitbretter groove, a plurality of the oil-out is followed the length direction interval setting in gleitbretter groove, and at least part the oil-out is located in the inner chamber.
The rotary compressor according to the embodiment of the first aspect of the invention has at least the following advantages:
during operation, lubricating oil of the oil storage tank of the shell enters the oil duct from the oil inlet of the oil duct under the action of pressure difference, then enters an end face gap between the sliding vane and the cylinder cover through the oil outlet, so that an oil film can be formed between the sliding vane and the cylinder cover, friction force between the sliding vane and the cylinder cover is reduced, meanwhile, as at least part of the oil outlets are arranged at intervals along the length direction of the sliding vane groove and are positioned in the inner cavity of the cylinder, when the sliding vane slides along the length direction of the sliding vane groove and stretches into the inner cavity of the cylinder, the oil duct can supply oil to the part of the sliding vane through the oil outlet positioned in the inner cavity of the cylinder, so that the part of the sliding vane still can form an oil film with the cylinder cover to realize sealing, and accordingly, the leakage amount of refrigerant from the compression cavity to the suction cavity through the end face gap between the sliding vane and the cylinder cover can be reduced, and volumetric efficiency and heat insulation efficiency of the compressor can be improved.
According to some embodiments of the invention, the plurality of oil outlets extend into the inner cavity by a maximum distance of L 1 The maximum length of the part of the sliding sheet extending into the inner cavity is L 2 Satisfy 0.5L 2 ≤L 1 ≤L 2 。
According to some embodiments of the invention, the maximum outer diameter of the oil outlet is W 1 The minimum width of the sliding vane groove is W 2 Satisfy W 1 ≤0.1W 2 。
According to some embodiments of the invention, the height difference between the slide and the cylinder along the axial direction of the cylinder is S 1 Satisfy 5S 1 ≤W 1 ≤20S 1 。
According to some embodiments of the invention, the maximum outer diameter of the oil outlet is W 1 The distance between the adjacent oil outlets is S 2 Satisfy 0.5W 1 ≤S 2 ≤W 1 。
According to some embodiments of the invention, a minimum distance between the oil outlet and the side wall of the sliding vane groove along the width direction of the sliding vane groove is S 3 Satisfy S 3 ≥0.1mm。
According to some embodiments of the invention, the cylinder cover is provided with a plurality of oil outlet groups, each oil outlet group comprises a plurality of oil outlets which are arranged at intervals along the length direction of the sliding vane groove, and a plurality of oil outlet groups are arranged at intervals along the width direction of the sliding vane groove.
According to some embodiments of the invention, a plurality of the oil outlet groups are arranged in parallel.
According to some embodiments of the invention, the outlets of adjacent groups of outlets are staggered.
According to some embodiments of the invention, the oil passage is provided along a length direction of the vane groove and penetrates to an outer peripheral wall of the cylinder head to form the oil inlet.
According to some embodiments of the invention, a plurality of said outlets extend into said cavity.
A refrigeration appliance according to an embodiment of the second aspect of the invention comprises a rotary compressor according to an embodiment of the first aspect of the invention.
The refrigerating equipment according to the embodiment of the second aspect of the invention has at least the following beneficial effects:
due to the adoption of the rotary compressor, when the refrigeration equipment works, lubricating oil in the oil storage tank of the shell enters the oil duct from the oil inlet of the oil duct under the action of pressure difference, then enters an end face gap between the sliding vane and the cylinder cover through the oil outlet, so that an oil film can be formed between the sliding vane and the cylinder cover, friction force between the sliding vane and the cylinder cover is reduced, meanwhile, as at least part of the oil outlets are arranged at intervals along the length direction of the sliding vane groove and are positioned in the inner cavity of the cylinder, when the sliding vane slides along the length direction of the sliding vane groove and stretches into the inner cavity of the cylinder, the oil duct can supply oil to the part of the sliding vane through the oil outlet positioned in the inner cavity of the cylinder, so that the part of the sliding vane still can form the oil film with the cylinder cover to realize sealing, and the leakage amount of refrigerant from the compression cavity to the suction cavity through the end face gap between the sliding vane and the cylinder cover can be reduced, the volume efficiency and the heat insulation efficiency of the compressor can be improved, and the energy efficiency of the refrigeration equipment can be improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic cross-sectional view of a rotary compressor according to some embodiments of the present invention;
FIG. 2 is a schematic cross-sectional structural view of a compression mechanism of a rotary compressor in accordance with some embodiments of the present invention;
FIG. 3 is an assembled block diagram of a cylinder and head of a rotary compressor according to some embodiments of the present invention;
fig. 4 is an enlarged view at a in fig. 3;
FIG. 5 is a schematic illustration of the cylinder head of FIG. 4 provided with a plurality of groups of oil outlets;
FIG. 6 is a cross-sectional view B-B in FIG. 3;
FIG. 7 is an enlarged view at C in FIG. 6;
FIG. 8 shows the leakage amount of refrigerant from the compression chamber to the suction chamber along with the length L of the portion of the oil outlet extending into the inner chamber 1 And the maximum length L of the portion of the slide extending into the cavity 2 Ratio L of (2) 1 /L 2 A graph of the change;
FIG. 9 shows the leakage amount of lubricating oil into the cylinder cavity along with the length L of the part of the oil outlet extending into the cavity 1 And the maximum length L of the portion of the slide extending into the cavity 2 Ratio L of (2) 1 /L 2 A graph of the change;
FIG. 10 is a view showing compressor efficiency as the length L of the portion of the oil outlet extends into the cavity 1 And the maximum length L of the portion of the slide extending into the cavity 2 Ratio L of (2) 1 /L 2 A graph of the change;
FIG. 11 shows the leakage amount of refrigerant from the compression chamber to the suction chamber with the maximum outer diameter W of the oil outlet 1 And the height difference S between the sliding vane and the cylinder 1 Ratio W of (2) 1 /S 1 A graph of the change;
FIG. 12 shows the leakage amount of lubricating oil to the cylinder cavity with the maximum outer diameter W of the oil outlet 1 And the height difference S between the sliding vane and the cylinder 1 Ratio W of (2) 1 /S 1 A graph of the change;
FIG. 13 shows compressor efficiency with maximum oil outlet diameter W 1 And the height difference S between the sliding vane and the cylinder 1 Ratio W of (2) 1 /S 1 Graph of the variation.
Reference numerals:
a housing 100; an oil reservoir 110;
a compression mechanism 200; a cylinder 210; a slide groove 211; a lumen 212; a cylinder head 220; an oil passage 221; an oil inlet 222; an oil outlet 223; a slide 230; a piston 240; a crankshaft 250;
and a motor 300.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, mounting, connection, assembly, cooperation, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical solution.
In the related art, a sliding vane of a rotary compressor performs reciprocating inertial motion in a sliding vane groove of a cylinder, and the height of the sliding vane is smaller than that of the cylinder, so that an end gap exists between the sliding vane and upper and lower bearings mounted on both sides of the axial direction of the cylinder, and the end gap is one of main leakage channels of a refrigerant of the compressor. When the compressor operates, lubricating oil flows into the end face clearance under the action of pressure difference, so that the lubrication and sealing effects are achieved. The inner cavity of the air cylinder is divided into a compression cavity and an air suction cavity by the sliding vane and the piston, a large pressure difference exists between the compression cavity and the air suction cavity, when the sliding vane stretches into the inner cavity of the air cylinder, lubricating oil in an end face gap between the sliding vane and a bearing in the inner cavity is sucked into the air suction cavity under the action of the pressure difference between the compression cavity and the air suction cavity, so that the end face gap of the part is difficult to realize sealing through the lubricating oil, and refrigerant gas in the compression cavity is leaked to the air suction cavity in a large amount from the end face gap in the compression and exhaust process, so that the volumetric efficiency and the heat insulation efficiency of the compressor are reduced.
In order to solve at least one technical problem described above, the present invention provides a rotary compressor capable of reducing the leakage amount of refrigerant leaking from a compression chamber to a suction chamber of the compressor, thereby being beneficial to improving the volumetric efficiency and the adiabatic efficiency of the compressor.
Referring to fig. 1, a rotary compressor according to an embodiment of the first aspect of the present invention includes a housing 100, a compression mechanism 200, and a motor 300, wherein the housing 100 has an oil reservoir 110, and lubricating oil is stored in the oil reservoir 110. The reservoir 110 is typically located at the bottom of the housing 100, although the reservoir 110 may be located at other suitable locations in the housing 100 as desired.
Referring to fig. 1, a compression mechanism 200 is installed inside the casing 100 for compressing refrigerant gas. Referring to fig. 2, specifically, the compression mechanism 200 includes a cylinder 210, a vane 230, and a cylinder cover 220, where the cylinder 210 is provided with an inner cavity 212 and a vane slot 211 that axially penetrates, and the vane slot 211 communicates with the inner cavity 212. The width of the sliding vane 230 is substantially the same as the width of the sliding vane groove 211, the sliding vane 230 is slidably mounted in the sliding vane groove 211, and one end of the sliding vane 230 can slide into the inner cavity 212 along the length direction of the sliding vane groove 211. The cylinder heads 220 are generally provided with two cylinder heads 220, and the two cylinder heads 220 are respectively installed at two axial sides of the cylinder 210, so that two axial sides of the inner cavity 212 of the cylinder 210 are sealed.
Referring to fig. 3 and 4, an oil duct 221 is provided in at least one cylinder head 220, the oil duct 221 is provided with an oil inlet 222 and a plurality of oil outlets 223, the oil inlet 222 is communicated with an oil reservoir, and lubricating oil in the oil reservoir can enter the oil duct 221 through the oil inlet 222. The oil outlets 223 are disposed at one end of the cylinder cover 220 facing the sliding vane groove 211 and opposite to the sliding vane groove 211, the plurality of oil outlets 223 are spaced along the length direction of the sliding vane groove 211, and at least part of the oil outlets 223 are disposed in the inner cavity 212. The oil outlet 223 may be circular or oval or other suitable shape and may be configured as desired.
Referring to fig. 1, a motor 300 is installed inside a housing 100, a rotor of the motor 300 is connected with a crankshaft 250, a piston 240 is installed at an end of the crankshaft 250, the piston 240 is located in an inner cavity 212 of a cylinder 210, and the motor 300 can drive the piston 240 to rotate in the inner cavity 212 of the cylinder 210 through the crankshaft 250 to compress refrigerant gas. Specifically, one end of the vane 230 extends from the vane slot 211 into the inner chamber 212 and abuts against the outer wall of the piston 240, so that the vane 230 and the piston 240 divide the inner chamber 212 into a compression chamber and a suction chamber. When the piston 240 rotates in the inner chamber 212, the refrigerant gas in the compression chamber can be compressed to change the medium-low pressure refrigerant gas into the high-pressure refrigerant gas and discharge the high-pressure refrigerant gas from the exhaust port, and the external low-pressure refrigerant gas can be sucked into the suction chamber from the suction port.
During operation, lubricating oil in an oil storage tank of the shell enters the oil duct 221 from the oil inlet 222 of the oil duct 221 under the action of pressure difference, then enters an end surface gap between the sliding vane and the cylinder cover 220 through the oil outlet 223, so that an oil film can be formed between the sliding vane and the cylinder cover 220, friction force between the sliding vane and the cylinder cover 220 is reduced, meanwhile, as a plurality of oil outlets 223 are arranged at intervals along the length direction of the sliding vane groove 211, at least part of the oil outlets 223 are positioned in the inner cavity 212 of the cylinder 210, when the sliding vane slides along the length direction of the sliding vane groove 211 and stretches into the inner cavity 212 of the cylinder 210, the oil duct 221 can supply oil to the part of the sliding vane through the oil outlet 223 positioned in the inner cavity 212 of the cylinder 210, and the part of sliding vane still can form an oil film with the cylinder cover 220 to realize sealing, so that the volume efficiency and heat insulation efficiency of a compressor can be improved, and the efficiency of the compressor can be improved.
It will be appreciated that the distance that oil outlet 223 extends into interior cavity 212 has a relationship with the amount of leakage of refrigerant, and that with reference to FIG. 8, FIG. 8 is the amount of leakage of refrigerant from the compression chamber to the suction chamber as a function of the length L of the portion of oil outlet 223 extending into interior cavity 212 1 And the maximum length L of the portion of the blade 230 extending into the cavity 212 2 Ratio L of (2) 1 /L 2 Graph of change. Specifically, when the distance that the oil outlet 223 extends into the inner cavity 212 is less than or equal to the maximum length that the sliding vane 230 extends into the inner cavity 212, the greater the distance that the oil outlet 223 extends into the inner cavity 212, the longer the maximum sealing length of the end face gap between the sliding vane 230 and the cylinder cover 220, so that the smaller the leakage amount of the refrigerant in the inner cavity 212 from the compression cavity to the suction cavity; when the distance that oil outlet 223 extends into inner cavity 212 is greater than the maximum length that slide 230 extends into inner cavity 212, as the distance that oil outlet 223 extends into inner cavity 212 increases, the maximum sealing length of the end gap between slide 230 and cylinder cover 220 is not changed, so the leakage amount of refrigerant in inner cavity 212 from the compression cavity to the suction cavity is not changed. Referring to FIG. 9, FIG. 9 shows the leakage amount of lubricating oil into the cylinder chamber 212 along with the length L of the portion of the oil outlet 223 extending into the chamber 212 1 And the maximum length L of the portion of the blade 230 extending into the cavity 212 2 Ratio L of (2) 1 /L 2 Graph of the variation. It can be seen that when the maximum length of the portion of the vane 230 extending into the inner chamber 212 is fixed, the leakage amount of the lubricating oil into the cylinder inner chamber 212 is increased as the length of the oil outlet 223 extending into the inner chamber 212 is increased. Referring to FIG. 10, FIG. 10 shows compressor efficiency as a function of length L of portion of oil outlet 223 extending into interior cavity 212 1 And the maximum length L of the portion of the blade 230 extending into the cavity 212 2 Ratio L of (2) 1 /L 2 The changed graph shows that when the length of the oil outlet 223 extending into the inner cavity 212 is less than or equal to the maximum length of the sliding vane 230 extending into the inner cavity 212, namely L 1 /L 2 When the pressure is less than or equal to 1, the leakage amount of the refrigerant in the inner cavity 212 from the compression cavity to the suction cavity is smaller along with the longer the oil outlet 223 extends into the inner cavity 212, so that the efficiency of the compressor is continuously improved; when the length of the oil outlet 223 extending into the inner cavity 212 is greater than the maximum length of the slide 230 extending into the inner cavity 212, i.e., L 1 /L 2 When the oil outlet 223 is extended into the inner cavity 212, the leakage amount of the refrigerant in the inner cavity 212 from the compression cavity to the suction cavity is basically unchanged, and the leakage amount of the lubricating oil to the inner cavity 212 of the cylinder is continuously increased, so that the efficiency of the compressor is continuously reduced. For this reason, in some embodiments of the invention, the plurality of oil outlets 223 extend into the interior cavity 212 a maximum distance L 1 The maximum length of the portion of the slide extending into the cavity 212 is L 2 Satisfy 0.5L 2 ≤L 1 ≤L 2 At this time, on one hand, the leakage amount of the refrigerant from the compression cavity to the suction cavity can be reduced as much as possible, the efficiency of the compressor is improved, and on the other hand, the increase of the leakage amount of the lubricating oil to the inner cavity 212 caused by the overlarge distance of the oil outlet 223 extending into the inner cavity 212 can be avoided.
Referring to fig. 4, it can be understood that, when the outer diameter of the oil outlet 223 is larger, the smaller the gap between the outer edge of the oil outlet 223 and the slide in the width direction of the slide groove 211 is, the smaller the gap is, which results in a higher possibility that the lubricating oil leaks to the inner chamber 212 through the gap. To this end, in some embodiments of the invention, oil outlet 223 has a maximum outer diameter W 1 The minimum width of the slide groove 211 is W 2 Satisfy W 1 ≤0.1W 2 The sliding vane 230 is matched with the sliding vane groove 211, the width of the sliding vane is basically equal to that of the sliding vane groove 211, and at this time, the outer diameter of the oil outlet 223 is not too large, so that the gap between the outer edge of the oil outlet 223 and the sliding vane along the width direction of the sliding vane groove 211 is not too small, and the leakage amount of lubricating oil is reduced.
Referring to fig. 4, in the above embodiment, the leakage amount of the lubricating oil can also be reduced by limiting the minimum size of the gap. Specifically, along the width direction of the sliding vane groove 211, the minimum distance between the oil outlet 223 and the side wall of the sliding vane groove 211 is S 3 Satisfy S 3 And 0.1mm, so that the gap between the outer edge of the oil outlet 223 and the sliding vane along the width direction of the sliding vane groove 211 is kept at a larger size, thereby being beneficial to reducing the amount of lubricating oil leaking into the inner cavity 212.
Since the width of the vane groove 211 is generally about 3mm, the outer diameter of the oil outlet 223 is limited to 0.3mm or less in the above-described embodiment, and the outer diameter range of the oil outlet 223 is still relatively large. It is understood that the slide 230 has a height difference from the cylinder 210 along the axial direction of the cylinder 210, and the height difference is typically about 20 μm. Referring to fig. 11 to 13, fig. 11 is a view showing the leakage amount of refrigerant from the compression chamber to the suction chamber with the maximum outer diameter W of the oil outlet 223 1 And the height difference S between the sliding vane and the cylinder 1 Ratio W of (2) 1 /S 1 FIG. 12 is a graph showing the leakage amount of lubricating oil to the cylinder inner cavity as a function of the maximum outer diameter W of the oil outlet 223 1 And the height difference S between the sliding vane and the cylinder 1 Ratio W of (2) 1 /S 1 FIG. 13 is a graph showing compressor efficiency as a function of maximum outer diameter W of oil outlet 223 1 And the height difference S between the sliding vane and the cylinder 1 Ratio W of (2) 1 /S 1 Graph of the variation. As can be seen, when the height difference is unchanged, referring to fig. 11 to 13, as the outer diameter of the oil outlet 223 is increased, the sealing effect of the lubricating oil is better, the refrigerant leaked from the compression chamber to the suction chamber is reduced, the work loss and the cooling capacity loss of the compressor due to the refrigerant leakage are reduced, and the efficiency of the compressor is improved; however, when the outer diameter of the oil outlet 223 is increased to a certain extent, the amount of refrigerant leaked from the compression chamber to the suction chamber is not substantially changed, and the amount of lubricant leaked from the oil outlet 223 to the suction chamber and the compression chamber is increased, so that the work loss and the cooling capacity loss of the compressor are increased due to the lubricant leakage, and the efficiency of the compressor is reduced. To this end, in some embodiments of the present invention, the height difference between the slide and the cylinder 210 along the axial direction of the cylinder 210 is S 1 Satisfy 5S 1 ≤W 1 ≤20S 1 At this time, the outer diameter range of the oil outlet 223 is further limited to a smaller range, the maximum outer diameter of the oil outlet 223 is within the width range, the compressor can realize that less refrigerant leaks from the compression chamber to the suction chamber, and simultaneously, less lubricating oil leaks from the oil outlet 223 to the suction chamber and the compression chamber, thereby being beneficial to enabling the compressor to obtain higher efficiency.
Referring to fig. 4, it can be understood that the smaller the distance between the adjacent oil outlets 223, the lower the structural strength of the end surface of the cylinder head 220, thereby increasing the abrasion amount between the cylinder head 220 and the sliding vane, so that the sealing effect between the cylinder head 220 and the sliding vane is reduced, thereby increasing the leakage amount of the refrigerant. To this end, in some embodiments of the invention, oil outlet 223 has a maximum outer diameter W 1 The distance between adjacent oil outlets 223 is S 2 Satisfy 0.5W 1 ≤S 2 ≤W 1 Thereby keeping the distance between the adjacent oil outlets 223 in a larger size, being beneficial to improving the structural strength of the end face of the cylinder cover 220 and reducing the cylinder cover220 and the slide 230, thereby facilitating a reduction in the leakage amount of the refrigerant.
Referring to fig. 5, it should be noted that in some embodiments of the present invention, cylinder head 220 is provided with a plurality of oil outlet groups, each of which includes a plurality of oil outlets 223 spaced apart along the length direction of slide groove 211, and a plurality of oil outlet groups spaced apart along the width direction of slide groove 211. By arranging a plurality of oil outlet groups, the distribution of the end face gap between the sliding vane 230 and the cylinder cover 220 is more sufficient, the sealing effect of the end face gap is improved, and the leakage amount of the refrigerant is reduced. Specifically, only one oil passage 221 may be provided, and one oil passage 221 corresponds to a plurality of oil outlet groups, and of course, a plurality of oil passages 221 may be provided, and each oil passage 221 corresponds to one oil outlet group.
Referring to fig. 5, in the above embodiment, it may be understood that the plurality of oil outlet groups may be disposed parallel to each other, so that the processing of the oil outlet 223 is more convenient, and the distance between the oil outlets 223 of the adjacent oil outlet groups is more uniform, which is beneficial to improving the effect of sealing the lubricating oil, thereby further reducing the leakage amount of the refrigerant.
Referring to fig. 5, it may be understood that in some embodiments of the present invention, the oil outlets 223 of the adjacent oil outlet groups are staggered, so that the distribution of the lubricating oil on the end surfaces of the sliding sheets is also staggered, thereby further improving the sealing range of the lubricating oil, and enabling the leakage paths of the refrigerant to be blocked more, so as to be beneficial to further reducing the leakage amount of the refrigerant.
Referring to fig. 6 and 7, it may be appreciated that in some embodiments of the present invention, the oil passage 221 is disposed along the length direction of the vane groove 211 and penetrates to the outer circumferential wall of the cylinder head 220 to form the oil inlet 222, and the oil inlet 222 may be directly immersed in the lubricating oil of the oil reservoir, and the oil inlet 222 may also extend into the lubricating oil of the oil reservoir through a pipe. Through the arrangement, the length of the oil duct 221 is shorter, the processing is more convenient, lubricating oil in the oil duct 221 can flow out to the end face of the cylinder cover 220 from the oil outlet 223 more rapidly, and the sealing effect of the lubricating oil is improved.
It can be appreciated that, in order to avoid too low strength of the cylinder cover 220 at the oil duct 221, the outer diameter of the oil duct 221 should not be too large, and the maximum outer diameter of the oil duct 221 is less than or equal to half of the overall thickness of the cylinder cover 220 at the oil duct 221, at this time, the influence of the oil duct 221 on the structural strength of the cylinder cover 220 can be reduced, so that the cylinder cover 220 can have higher structural strength, and the increase of the gap between the cylinder cover 220 and the sliding vane caused by too large deformation of the cylinder cover 220 is avoided.
Referring to fig. 1 and 2, it can be appreciated that in some embodiments of the present invention, the rotary compressor is a vertical compressor, the oil reservoir 110 is located at the bottom of the housing 100, and the lower end of the compression mechanism 200 is immersed in the lubricating oil of the oil reservoir 110. The cylinder heads 220 are provided with two, and the two cylinder heads 220 are respectively installed on two axial sides of the cylinder 210, wherein the cylinder heads 220 positioned at the lower ends of the cylinder 210 are lower bearings, the lower bearings are immersed in lubricating oil, an oil duct 221 penetrates through the peripheral wall of each lower bearing to form an oil inlet 222, lubricating oil in the oil storage tank 110 can enter the oil duct 221 through the oil inlet 222, and then enter an end face gap between the sliding sheet 230 and the cylinder heads 220, so that the end face gap is sealed, and the leakage amount of refrigerant passing through the end face gap is reduced.
It will be appreciated that in some embodiments of the present invention, the rotary compressor may also be a horizontal compressor, and the lubrication oil in the oil reservoir 110 may be delivered into the oil passage 221 through the pipe communicating with the oil inlet 222, or a portion of the cylinder head 220 may be immersed in the lubrication oil, so that the oil inlet 222 is immersed in the lubrication oil, so that the lubrication oil may directly enter the oil passage 221 through the oil inlet 222, and then enter the end surface gap to achieve sealing.
It should be noted that, the compression mechanism 200 may include two or more cylinders 210, adjacent cylinders 210 are connected by a middle partition, the end surfaces of two cylinders 210 located at the outer side are respectively provided with a bearing, at this time, the bearings and the middle partition are the cylinder heads 220 of the cylinders 210, and the oil duct 221 may be opened on the end surfaces of the middle partition and/or the bearings as required.
It will be appreciated that the plurality of oil outlets 223 may include two parts, wherein one part of the oil outlets 223 is located outside the inner cavity 212, and the other part of the oil outlets 223 extends into the inner cavity 212, and refrigerant leaks from the compression cavity to the suction cavity and occurs in the inner cavity 212 of the cylinder 210, at this time, the oil outlets 223 located outside the inner cavity 212 can play a role in lubricating the slide sheet and the cylinder cover 220 through lubricating oil so as to reduce abrasion therebetween, and the oil outlets 223 extending into the inner cavity 212 can play a role in sealing an end surface gap between the slide sheet and the cylinder cover 220 through lubricating oil so as to reduce leakage amount of the refrigerant; of course, all the oil outlets 223 may extend into the inner cavity 212, and all the oil outlets 223 may function to seal the end gap between the sliding vane and the cylinder cover 220 by using lubricating oil to reduce the leakage of the refrigerant.
The refrigerating device provided by the embodiment of the second aspect of the invention can be an air conditioner or a refrigerator or other devices with refrigerating functions. The refrigeration apparatus includes a rotary compressor in accordance with an embodiment of the first aspect of the present invention.
A refrigeration appliance according to an embodiment of the second aspect of the invention comprises a rotary compressor according to an embodiment of the first aspect of the invention.
Due to the adoption of the rotary compressor, when the refrigeration equipment works, lubricating oil in an oil storage tank of a shell enters the oil duct 221 from the oil inlet 222 of the oil duct 221 under the action of pressure difference, then enters an end surface gap between the sliding vane and the cylinder cover 220 through the oil outlet 223, so that an oil film can be formed between the sliding vane and the cylinder cover 220, friction force between the sliding vane and the cylinder cover 220 is reduced, and meanwhile, as at least part of the oil outlets 223 are arranged at intervals along the length direction of the sliding vane groove 211 and are positioned in the inner cavity 212 of the cylinder 210, when the sliding vane slides along the length direction of the sliding vane groove 211 and stretches into the inner cavity 212 of the cylinder 210, the oil duct 221 can supply oil to the part of the sliding vane through the oil outlet 223 positioned in the inner cavity 212 of the cylinder 210, so that an oil film can still be formed between the part of the sliding vane and the cylinder cover 220 to realize sealing, and therefore, the leakage amount of refrigerant of the compression cavity leaking to the suction cavity through the end surface gap between the sliding vane and the cylinder cover 220 can be reduced, the volume efficiency and the heat insulation efficiency of the refrigeration equipment are improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (12)

1. A rotary compressor, comprising:
a housing having an oil reservoir;
the compression mechanism is arranged in the shell and comprises a cylinder, a sliding vane and a cylinder cover, wherein the cylinder is provided with an inner cavity and a sliding vane groove communicated with the inner cavity, the sliding vane is slidably arranged in the sliding vane groove and can slide into the inner cavity along the length direction of the sliding vane groove, and the cylinder cover is arranged on one side of the cylinder along the axial direction;
the inside of cylinder cap is provided with the oil duct, the oil duct is provided with oil inlet and a plurality of oil-out, the oil inlet with the oil storage pond intercommunication, the oil-out set up in the cylinder cap orientation the one end of gleitbretter groove, a plurality of the oil-out is followed the length direction interval setting in gleitbretter groove, and at least part the oil-out is located in the inner chamber.
2. The rotary compressor of claim 1, wherein: the maximum distance of the oil outlet extending into the inner cavity is L 1 The maximum length of the part of the sliding sheet extending into the inner cavity is L 2 Satisfy 0.5L 2 ≤L 1 ≤L 2 。
3. The rotary compressor of claim 1, wherein: the maximum outer diameter of the oil outlet is W 1 The minimum width of the sliding vane groove is W 2 Satisfy W 1 ≤0.1W 2 。
4. A rotary compressor according to claim 3, wherein: along the axial direction of the cylinder, the height difference between the sliding vane and the cylinder is S 1 Satisfy 5S 1 ≤W 1 ≤20S 1 。
5. The rotary compressor of claim 1, wherein: the maximum outer diameter of the oil outlet is W 1 The distance between the adjacent oil outlets is S 2 Satisfy 0.5W 1 ≤S 2 ≤W 1 。
6. The rotary compressor of claim 1, wherein a minimum distance between the oil outlet and a sidewall of the vane groove in a width direction of the vane groove is S 3 Satisfy S 3 ≥0.1mm。
7. The rotary compressor of claim 1, wherein: the cylinder cover is provided with a plurality of oil outlet groups, each oil outlet group comprises a plurality of oil outlets which are arranged at intervals along the length direction of the sliding vane groove, and a plurality of oil outlet groups are arranged at intervals along the width direction of the sliding vane groove.
8. The rotary compressor of claim 7, wherein: the plurality of oil outlet groups are mutually parallel.
9. The rotary compressor of claim 7, wherein: the oil outlets of the adjacent oil outlet groups are staggered.
10. The rotary compressor of claim 1, wherein: the oil duct is arranged along the length direction of the sliding vane groove and penetrates through the peripheral wall of the cylinder cover to form the oil inlet.
11. The rotary compressor of any one of claims 1 to 10, wherein: the plurality of oil outlets extend into the inner cavity.
12. Refrigeration apparatus comprising a rotary compressor according to any one of claims 1 to 11.
CN202210232214.6A 2022-03-09 2022-03-09 Rotary compressor and refrigeration equipment Active CN114542472B (en)

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CN114542472B true CN114542472B (en) 2023-06-06

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Publication number Priority date Publication date Assignee Title
CN203404081U (en) * 2013-07-17 2014-01-22 广东美芝制冷设备有限公司 Rotary compressor and refrigerating system provided with same
CN204436789U (en) * 2015-02-02 2015-07-01 广东美芝制冷设备有限公司 Rotary compressor
JP6567352B2 (en) * 2015-07-28 2019-08-28 東芝キヤリア株式会社 Rotary compressor and refrigeration cycle apparatus
CN109595161B (en) * 2017-09-30 2024-04-02 广东美芝制冷设备有限公司 Compressor
CN108005901A (en) * 2017-12-28 2018-05-08 广东美的制冷设备有限公司 Low backpressure rotary compressor

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