EP2884106B1 - Compresseur - Google Patents

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Publication number
EP2884106B1
EP2884106B1 EP14196423.9A EP14196423A EP2884106B1 EP 2884106 B1 EP2884106 B1 EP 2884106B1 EP 14196423 A EP14196423 A EP 14196423A EP 2884106 B1 EP2884106 B1 EP 2884106B1
Authority
EP
European Patent Office
Prior art keywords
oil
retaining means
supply pipe
compressor according
oil supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14196423.9A
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German (de)
English (en)
Other versions
EP2884106A1 (fr
Inventor
Takashi Moriyama
Hiroki Murakami
Hiroaki Ishikawa
Asako Tamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
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Publication of EP2884106A1 publication Critical patent/EP2884106A1/fr
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Publication of EP2884106B1 publication Critical patent/EP2884106B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0238—Hermetic compressors with oil distribution channels
    • F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • 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
    • F04C29/023—Lubricant distribution through a hollow driving shaft
    • 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

Definitions

  • the present invention relates to a compressor employed in, for example, refrigerating apparatuses and air-conditioning apparatuses.
  • Conventional compressors typically include those configured to draw by suction lubricating oil, stored in an oil reservoir provided in the bottom portion of a container, using an oil pump through an oil supply pipe, and supply the lubricating oil to sliding portions through oil supply conduits.
  • Patent Literature 1 discloses a scroll compressor that includes an oil supply means including an oil supply member having its lower end portion dipped in the lubricating oil in the oil reservoir, so as to draw the lubricating oil up by suction by the capillary effect and supply the lubricating oil to the key of the scroll of an Oldham's coupling from the upper end portion of the oil supply member.
  • Patent Literature 2 discloses a horizontal vibration compressor including a flexible and permeable oil suction pipe, having at least a part dipped in an oil reservoir and connected to a low-pressure chamber in the main body of the compressor.
  • the oil suction pipe includes a metal wire for maintaining the shape of this pipe, and has its free end which is fixed to the metal wire and has its opening blocked.
  • the present invention has been made in order to solve the foregoing problems, and has as its object to provide a compressor configured to supply a relatively large amount of oil while preventing shortage of the oil.
  • the invention is defined in claim 1.
  • the oil can be stably supplied to the compression mechanism through the oil supply pipe. It is, therefore, possible to achieve a compressor which can supply a relatively large amount of oil while preventing shortage of the oil.
  • FIG. 1 is a cross-sectional view showing an exemplary configuration of the compressor according to Embodiment 1.
  • Embodiment 1 refers to a horizontal scroll compressor as an example.
  • the compressor according to Embodiment 1 constitutes a part of a refrigeration cycle apparatus employed in, for example, an air-conditioning apparatus, a refrigerating apparatus, a refrigerator for refrigerating and keeping items cool, a freezer for freezing and keeping items frozen, an automatic vending machine, and a water heater.
  • FIG. 1 and other drawings the dimensional ratios or shapes of constituent components may be different from the actual ones.
  • the compressor according to Embodiment 1 includes a compression mechanism 20 that compresses a refrigerant, an electric motor mechanism 30 that drives the compression mechanism 20, and a sealed container 40 (exemplifying the container in the present invention) accommodating the compression mechanism 20 and the electric motor mechanism 30.
  • a suction pipe 13 for introducing a refrigerant with a low pressure from the outside, and a discharge pipe 14 for discharging to the outside the refrigerant as compressed to a high pressure are attached to the sealed container 40.
  • the compression mechanism 20 is disposed so as to divide the space inside the sealed container 40 into a space on the side of the suction pipe 13 (suction space) and a space on the side of the discharge pipe 14 (discharge space).
  • the electric motor mechanism 30 and an oil reservoir 11 are located in the suction space.
  • the compression mechanism 20 is covered with a main frame 1 fixed to the sealed container 40.
  • the compression mechanism 20 includes an oscillating scroll 3 attached to a rotary shaft 2 to be rotated by the electric motor mechanism 30, and a fixed scroll 4 fixed to the main frame 1.
  • the oscillating scroll 3 includes a scroll lap 3a formed on its one face
  • the fixed scroll 4 includes a scroll lap 4a formed on its one face.
  • the oscillating scroll 3 and the fixed scroll 4 are oriented such that the scroll laps 3a and 4a mesh with each other. Accordingly, a plurality of compression chambers 12 partitioned from each other by the scroll lap 3a or 4a are provided between the oscillating scroll 3 and the fixed scroll 4.
  • the surface of the oscillating scroll 3 opposite to the surface, with the scroll lap 3a, of the oscillating scroll 3 serves as a thrust surface 3b which abuts against a thrust bearing provided between the thrust surface 3b and the main frame 1.
  • the rotary shaft 2 is rotatably supported by a main bearing 5 attached to the main frame 1, and a sub bearing 6 attached to a subframe 7.
  • the subframe 7 is fixed to the sealed container 40. Note that FIG. 1 does not illustrate the detailed configuration and position of the main bearing 5 and the sub bearing 6.
  • a rotor 8 of the electric motor mechanism 30 is attached to a portion of the rotary shaft 2 between the main bearing 5 and the sub bearing 6.
  • a stator 9 of the electric motor mechanism 30 is attached to the sealed container 40, so as to cover the outer periphery of the rotor 8.
  • the rotary shaft 2 includes an oil supply conduit 2a formed in it.
  • An oil reservoir 11 in which the oil is stored is provided between the end portion of the rotary shaft 2 on the side of the subframe 7 and the inner surface of the sealed container 40 (for example, a bottom portion 15 or a side face 16).
  • the oil supply pipe 10 has its one port connected to the end portion of the oil supply conduit 2a on the side of the subframe 7.
  • a suction port 10a that is, the other port of the oil supply pipe 10 is dipped in the oil within the oil reservoir 11 and connected to oil retaining means 17 (to be described later) at a position lower than an oil surface 11a (for example, the suction port 10a is covered with the oil retaining means 17). That is, the oil supply pipe 10 extends from the end portion of the oil supply conduit 2a (the end portion of the rotary shaft 2) to the oil retaining means 17.
  • an oil pump 19 is provided at the end portion of the oil supply conduit 2a on the side of the subframe 7.
  • the oil pump 19 serves to draw up the oil in the oil reservoir 11 through the oil supply pipe 10 and supply it to each sliding portion through the oil supply conduit 2a.
  • the oil pump 19 may be provided on the side of the main frame 1.
  • various known pumps can be employed as the oil pump 19.
  • a certain component of the thus introduced oil passes through the sealed container 40 and is stored in the oil reservoir 11, and the remainder of the oil and oil droplets that have splashed from the oil reservoir 11 flow into the compression chamber 12, together with the refrigerant, through a refrigerant suction hole 1a provided in the main frame 1.
  • the high-pressure refrigerant and the oil compressed in the compression chamber 12 are discharged to the outside of the compressor through a discharge hole 4b formed in the fixed scroll 4 and through the discharge pipe 14.
  • the oil stored in the oil reservoir 11 is drawn by suction by the oil pump 19 provided in the oil supply conduit 2a from the suction port 10a of the oil supply pipe 10, and supplied to each sliding portion in the compressor (for example, the thrust surface 3b (thrust bearing), the main bearing 5, and the sub bearing 6) through the oil supply conduit 2a.
  • This lubricates the sliding portions in the compressor, and thus prevents them from suffering a seizure.
  • the oil that has lubricated the sliding portions is returned to the oil reservoir 11 through predetermined lubricant paths.
  • FIG. 2 is a cross-sectional view showing an exemplary configuration of the oil reservoir 11 and surrounding parts of a popular vertical compressor.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor shown in FIG. 1 .
  • the oil reservoir 11 is formed on the bottom portion 15 of the sealed container 40 upon fall (or downflow) of the oil due to gravity.
  • the oil supply pipe 10 straightly extends vertically downwards from the connection point at the end portion of the oil supply conduit 2a on the side of the subframe 7, and the suction port 10a at the lower end is dipped in the oil within the oil reservoir 11.
  • FIG. 3 is a schematic diagram for explaining how to define the direction and angle of tilt of the horizontal compressor.
  • the direction in which the rotary shaft 2 rotates (the direction of rotation about the rotary shaft 2) is defined as the ⁇ -direction, and the angle of tilt with respect to an arbitrary set angle is defined as ⁇ [unit: degrees or °].
  • the direction of tilt (elevation angle direction) of the rotary shaft 2 with respect to a horizontal plane (or a horizontal axis included in the horizontal plane) perpendicular to the gravitational direction (vertical direction) of fall is defined as the ⁇ -direction
  • the thus measured angle of tilt (angle of elevation) is defined as ⁇ [unit: degrees or °].
  • the angle of tilt ⁇ is defined to be 0° when the rotary shaft 2 is set horizontal, positive when the end portion of the rotary shaft 2 on the side of the oscillating scroll 3 is elevated, and negative when the end portion of the rotary shaft 2 on the side of the bottom portion 15 is elevated.
  • the horizontal compressor according to Embodiment 1 is typically installed in practice and ready to use such that the main body of the compressor (sealed container 40) is tilted at an angle of tilt ⁇ of 0° to 360° (0° ⁇ ⁇ ⁇ 360°), and at an angle of tilt ⁇ of 0° to 90° (0° ⁇ ⁇ ⁇ 90°).
  • the oil reservoir 11 formed on the inner surface of the sealed container 40 is positioned on the side of the lower, side face 16 due to gravity. For this reason, the oil supply pipe 10 is bent vertically downwards in the horizontal compressor, so as to dip the suction port 10a at the lower end in the oil within the oil reservoir 11.
  • the oil reservoir 11 Since the oil reservoir 11 is positioned on the side of the side face 16 in the horizontal compressor, the height of the oil surface 11a, which is defined vertically upwards from the suction port 10a, is more likely to be low.
  • the flow rate of the refrigerant increases or when the refrigerant dissolved in the oil evaporates to form bubbles at the time of activating the compressor, the oil splashes inside the sealed container 40.
  • the compressor according to Embodiment 1 is the horizontal compressor tilted at angles of tilt ⁇ and ⁇ that satisfy 0° ⁇ ⁇ ⁇ 360° and 0° ⁇ ⁇ ⁇ 90°, respectively, the oil reservoir 11 is positioned on the side of the side face 16 of the sealed container 40 due to gravity.
  • the oil supply pipe 10 is bent so as to dip the suction port 10a in the oil within the oil reservoir 11 which is positioned on the side of the side face 16.
  • the suction port 10a is located in the vicinity of the lowermost portion in the oil reservoir 11.
  • the oil reservoir 11 in the sealed container 40 includes the oil retaining means 17 configured to retain the oil.
  • the oil retaining means 17 according to Embodiment 1 is attached to extend along the shapes of the bottom portion 15 and the side face 16. A part of the oil retaining means 17 is dipped in the oil within the oil reservoir 11, and its remaining part is disposed in a gas space above the oil reservoir 11.
  • the oil retaining means 17 is attached so as to cover the suction port 10a of the oil supply pipe 10, or disposed so as to enclose the suction port 10a with a gap formed between them.
  • the oil retaining means 17 has an internal structure with a large number of voids, such as a porous (continuous porous), cotton-like, grid, or net-like structure. At least a part of the surface of the oil retaining means 17 (for example, its entire surface) disposed in contact with the oil is formed of a lipophilic material. Accordingly, the oil retaining means 17 is capable of absorbing the oil in the oil reservoir 11 by the capillary effect, and retaining the absorbed oil.
  • the suction port 10a of the oil supply pipe 10 is connected to the oil retaining means 17 disposed in the oil reservoir 11, the oil is collected around the suction port 10a due to the capillary effect. Therefore, even though the oil surface 11a falls below the suction port 10a, the oil drawn by suction through the suction port 10a can be prevented from decreasing, and hence short supply of the oil to the sliding portions can be prevented.
  • the aforementioned configuration eliminates the need to increase the diameter of the container of the horizontal compressor to increase the amount of oil stored (initial amount of oil charged), and allows the vertical compressor to be converted into a horizontal compressor with a simple structural conversion method. More specifically, the diameter of the container of the horizontal compressor can be kept small, and the horizontal compressor and the vertical compressor can be manufactured through the same manufacturing line.
  • the vertical compressor can be converted into a horizontal compressor simply by removing the bottom portion 15 of the sealed container 40 or attaching, before mounting the bottom portion 15 in the manufacturing process, the oil supply pipe 10 bent in a different direction (or bending the oil supply pipe 10), attaching the oil retaining means 17 to the bottom portion 15 or the side face 16, and then mounting the bottom portion 15 onto the sealed container 40.
  • the oil can be prevented from splashing inside the container because the rotor is dipped in the oil within the oil reservoir. Therefore, degradation in efficiency of the refrigeration cycle due to an increase in amount of oil in the discharged refrigerant can be suppressed.
  • the oil surface 11a oscillates due to movement or vibration of the compressor. Accordingly, the suction port 10a may be exposed from the oil reservoir 11, or the oil surface 11a may come into contact with the rotor 8 so that the oil splashes inside the sealed container 40 and is discharged together with the refrigerant.
  • the compressor according to Embodiment 1 allows the oil retained by the oil retaining means 17 to be drawn by suction through the suction port 10a even in the aforementioned occasions, thereby preventing short supply of the oil to the sliding portions.
  • the compressor according to Embodiment 1 includes the sealed container 40, the rotary shaft 2 supported in the sealed container 40, the compression mechanism 20 that compresses the refrigerant upon rotation of the rotary shaft 2, the oil supply conduit 2a that is formed inside the rotary shaft 2, and allows the oil supplied to the compression mechanism 20 to flow through it, the oil reservoir 11 provided inside the sealed container 40 in its lower portion, the oil retaining means 17 having a part disposed in the oil reservoir 11, and the remaining part disposed in the gas space above the oil reservoir 11, and containing a large number of voids to retain the oil, and the oil supply pipe 10 having its one port connected to the oil supply conduit 2a, and its other port (suction port 10a) disposed in the oil reservoir 11.
  • the sealed container 40 of the compressor according to Embodiment 1 is disposed such that the rotary shaft 2 is tilted with respect to the vertical direction, and the oil supply pipe 10 is bent such that the suction port 10a faces downwards in the gravitational direction and is located in the vicinity of the lowermost portion of the oil reservoir 11.
  • the aforementioned configuration allows the oil to be collected in the oil retaining means 17 located around the suction port 10a, thereby preventing a decrease in amount of oil drawn by suction through the suction port 10a, and allowing stable supply of the oil to the sliding portions, even when the oil surface 11a falls below the suction port 10a due, for example, to a decrease in level of the oil surface 11a or vibration.
  • Embodiment 1 achieves a wide allowable range of the initial amount of oil charged into the compressor to be extended, thereby facilitating the adjustment of the initial amount of oil charged.
  • the foregoing configuration allows the vertical compressor to be converted into a horizontal compressor with a simple structural conversion process that does not require significant redesigning of the manufacturing process, thereby making it possible to manufacture the vertical compressor and the horizontal compressor through the same manufacturing line.
  • FIG. 4 is a cross-sectional view showing an exemplary configuration of the oil reservoir 11 and surrounding parts of the compressor according to Embodiment 2.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • the oil retaining means 17 covers the suction port 10a and is provided on almost the entire bottom portion 15 of the sealed container 40. A part of the oil retaining means 17 is dipped in the oil within the oil reservoir 11, and its remaining part is disposed in the gas space above the oil reservoir 11.
  • the oil supply pipe 10 is bent such that the suction port 10a faces vertically downwards, that is, faces the oil reservoir 11.
  • the suction port 10a is located near the lowermost position in the oil reservoir 11.
  • the aforementioned configuration allows the oil to be collected in the oil retaining means 17 not only around the oil supply pipe 10 but also over a broad region of the bottom portion 15, thereby increasing the upper limit of the amount of oil stored in the compressor. Further, since the oil retaining means 17 is fitted with the structure of the bottom portion 15, the oil retaining means 17 can be fixed to the sealed container 40 even without an adhesive or the like.
  • FIG. 5 is a cross-sectional view showing an exemplary configuration of the oil reservoir 11 and surrounding parts of a compressor according to a modification to Embodiment 2.
  • the oil retaining means 17 is formed of a highly lipophilic material.
  • the oil supply pipe 10 is not bent vertically downwards but linearly extends in the axial direction.
  • the oil retaining means 17 is formed of a highly lipophilic material, the oil can be distributed over the entire oil retaining means 17.
  • the configuration according to this modification eliminates the need to change the orientation of the oil supply pipe 10 according to the direction and angle of tilt, despite the tilt of the compressor in a given direction at a given angle.
  • the compressor of the same configuration can be used both as a horizontal compressor tilted at a desired angle of tilt ⁇ of 0° to 360° (0° ⁇ ⁇ ⁇ 360°) and a desired angle of tilt ⁇ of 0° to 90° (0° ⁇ ⁇ ⁇ 90°), and a vertical compressor that is tilted at an angle of tilt ⁇ of 90°, in other words, that stands upright.
  • FIG. 6 is a cross-sectional view showing an exemplary configuration of the oil reservoir 11 and surrounding parts of the compressor according to Embodiment 3.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • the compressor according to Embodiment 3 includes a cover 18 that covers the oil retaining means 17.
  • the suction port 10a of the oil supply pipe 10 is inserted in the oil retaining means 17 via a through hole (not shown) formed in the cover 18.
  • the cover 18 is disposed so as to cover the oil retaining means 17 except for the portion in which the oil supply pipe 10 is introduced.
  • the inserted outer peripheral surface of the suction port 10a is fixed, using an adhesive, to the cover 18 without a gap between them.
  • the end portion of the cover 18 is fixed to the bottom portion 15 or the side face 16 of the sealed container 40 in close contact with it.
  • the cover 18 includes an opening 18a formed in its portion dipped in the oil within the oil reservoir 11, so as to introduce the oil.
  • the opening 18a may be a through hole formed in the cover 18, or a notch formed in a portion of the cover 18 joined to the bottom portion 15 or the side face 16.
  • the cover 18 according to Embodiment 3 tightly seals the oil retaining means 17 between itself and the inner surface of the sealed container 40, except for the through hole through which the suction port 10a is inserted and the opening 18a.
  • a cotton-like or porous member may be employed to form the oil retaining means 17.
  • the compressor according to Embodiment 3 further includes the cover 18 that covers the oil retaining means 17 except for the portion, in which the oil supply pipe 10 is introduced, and is fixed to the oil reservoir 11.
  • the cover 18 includes the opening 18a formed in its portion dipped in the oil within the oil reservoir 11.
  • the oil retaining means 17 can be covered with the cover 18 and fixed inside the sealed container 40, thereby eliminating the need to provide a means for directly fixing the oil retaining means 17 itself to the sealed container 40, and thus suppressing a positional shift of the oil retaining means 17 resulting from movement or vibration of the compressor.
  • a portion of the cover 18 disposed in contact with the refrigerant gas (for example, a portion above the oil surface 11a) is tightly closed. Accordingly, the internal pressure of the cover 18 (its portion on the side of the oil retaining means 17) drops because of the drawing force of the oil pump 19 provided in the oil supply conduit 2a, and therefore the oil in the oil reservoir 11 can be introduced through the opening 18a. As a result, the amount of refrigerant gas contained in the oil retaining means 17 can be reduced and the amount of oil retained can be increased.
  • the oil supply pipe 10 has a small diameter and hence easily flexes. Accordingly, if the suction port 10a is not fixed, vibration is transmitted to the oil supply pipe 10 through the rotary shaft 2 and the subframe 7 upon the operation of the electric motor mechanism 30, so that the oil supply pipe 10 may resonate depending on the rotation frequency, and largely vibrate.
  • the oil in the oil reservoir 11 and the oil retaining means 17 is stirred up around the oil supply pipe 10 and spreads inside the sealed container 40, and, as a result, a larger amount of oil enters the refrigerant suction hole 1a together with the refrigerant.
  • the distal end of the oil supply pipe 10 suction port 10a
  • the resonation of the oil supply pipe 10 can be prevented, and therefore the oil can be prevented from being stirred up by the vibration.
  • FIG. 7 is a perspective view showing an exemplary configuration of the cover 18 around the oil supply pipe 10 in the compressor according to a modification to Embodiment 3.
  • the cover 18 may include a plurality of small openings 18b penetrating through it between its surface on the side of the oil retaining means 17 and its surface, on the side of the gas space, which is opposite to the former.
  • the small openings 18b allow, even though the gas dissolved in the oil has evaporated, the gas to be driven out from the inside of the cover 18, thereby maintaining the amount of oil retained by the oil retaining means 17. Since the openings 18b have a small diameter, the drop of the internal pressure of the cover 18 (its portion on the side of the oil retaining means 17) due to the drawing force of the oil pump 19 can be maintained, which allows the oil in the oil reservoir 11 to be introduced through the opening 18a.
  • FIG. 8 is a perspective view showing an exemplary configuration of the cover 18 around the oil supply pipe 10 in the compressor according to Embodiment 4.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • the cover 18 includes an opening 18c which is formed around the oil supply pipe 10 and has a diameter larger than the outer diameter of the oil supply pipe 10.
  • the oil retaining means 17 includes a cylindrical opening 17c which is formed around the oil supply pipe 10 and has a diameter larger than the outer diameter of the oil supply pipe 10. Because of the presence of the openings 17c and 18c, the oil retaining means 17 and the cover 18 covering its upper face are disposed so as to surround the oil supply pipe 10 with a gap between them.
  • the configuration shown in FIG. 8 can raise the level of the oil surface 11a around the oil supply pipe 10, thereby preventing short supply of the oil resulting from a sudden fall of the oil surface.
  • FIG. 9 is a perspective view showing an exemplary configuration of the cover 18 around the oil supply pipe 10 in the compressor according to Embodiment 5.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • the oil retaining means 17 includes the cylindrical opening 17c which is formed around the oil supply pipe 10 and has a diameter larger than the outer diameter of the oil supply pipe 10. Because of the presence of the opening 17c, the oil retaining means 17 is disposed so as to surround the oil supply pipe 10 with a gap between them. The surface of the oil retaining means 17, which surrounds the oil supply pipe 10, is covered with a cylindrical cover 21.
  • the cover 21 includes one or a plurality of openings 21a that allow the oil to be introduced from the side of the oil retaining means 17 into the space on the side of the inner circumferential surface of the cover 21.
  • the opening 21a may be a through hole formed in the cover 21, or a notch formed in a portion of the cover 21 joined to the bottom portion 15 or the side face 16.
  • the cover 21 can interrupt the oil flow when the oil surface 11a in the compressor fluctuates due to acceleration, deceleration, or a sudden change in tilt, to thereby suppress drastic fluctuation of the oil surface 11a in the region between the oil supply pipe 10 and the cover 21.
  • FIG. 10 is a cross-sectional view showing an exemplary configuration of the oil reservoir 11 and surrounding parts of the compressor according to Embodiment 6.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • the oil retaining means 17 is formed of a hard member such as a metal including, for example, a foamed metal plate or a foamed metal block.
  • the oil retaining means 17 is formed of a member capable of maintaining its shape without the need to be supported by the cover.
  • the oil retaining means 17 is fixed to the bottom portion 15 or the side face 16 of the sealed container 40 using a predetermined fixing tool.
  • the suction port 10a of the oil supply pipe 10 is directly fixed to the oil retaining means 17.
  • the oil retaining means 17 is fixed to the wall surface (for example, the bottom portion 15 or the side face 16) of the sealed container 40.
  • the oil retaining means 17 of the compressor according to Embodiment 6 is formed of a metal-based member capable of maintaining its shape, and the suction port 10a of the oil supply pipe 10 is fixed by the oil retaining means 17. According to Embodiment 6, as in Embodiment 3, vibration of the oil supply pipe 10 caused by the rotational operation can be suppressed to prevent oil from splashing inside the sealed container 40.
  • the oil supply pipe 10 may have a plurality of bends in the path between its contact end portion on the side of the subframe 7 and the suction port 10a, with the suction port 10a of the oil supply pipe 10 being maintained inside the oil retaining means 17.
  • Such a configuration can shift the natural frequency of the oil supply pipe 10 and tightly fix the oil supply pipe 10 to the oil retaining means 17, thereby more efficiently suppressing vibration of the oil supply pipe 10.
  • FIG. 11 is a cross-sectional view showing an exemplary configuration of the oil reservoir 11 and surrounding parts of the compressor according to Embodiment 7.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • the oil retaining means 17 is connected to the oil supply pipe 10 so as to cover its periphery.
  • the oil retaining means 17 is fixed to the outer peripheral portion of the oil supply pipe 10.
  • most of the oil supply pipe 10 (at least its half) in the axial direction is covered with the oil retaining means 17. At least a part of the oil retaining means 17 is dipped in the oil within the oil reservoir 11.
  • the aforementioned configuration allows the oil retaining means 17 and the oil supply pipe 10 to be installed in and removed from the compressor as a unified member, thereby facilitating the manufacturing and the maintenance work of the compressor.
  • FIG. 12 is a cross-sectional view showing an exemplary configuration of the oil reservoir 11, the subframe 7, and surrounding parts of a compressor according to Embodiment 8 of the present invention.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • the oil retaining means 17 is formed on the surface of the subframe 7 on the side of the oil supply pipe 10 (on the side of the bottom portion 15).
  • the oil retaining means 17 covers almost the entire surface of the subframe 7 on the side of the oil supply pipe 10, and is fixed to this surface. At least a part of the oil retaining means 17 is dipped in the oil within the oil reservoir 11.
  • the oil retaining means 17 is connected to the oil supply pipe 10 so as to cover the suction port 10a of the oil supply pipe 10 or surround the suction port 10a with a gap between them. Further, openings or gaps that connect the space in the subframe 7 on the side of the oil supply pipe 10 and the space on the side of the electric motor mechanism 30 are covered with the oil retaining means 17 fixed to the surface of the subframe 7 on the side of the oil supply pipe 10.
  • the compressor according to Embodiment 8 also includes the subframe 7 that supports the end portion of the rotary shaft 2 on the side of the oil supply pipe 10, and the oil retaining means 17 is provided on the surface of the subframe 7 on the side of the oil supply pipe 10.
  • the oil retaining means 17 can interrupt gas flow between the space on the side of the electric motor mechanism 30 and the space on the side of the oil supply pipe 10 through openings or gaps of the subframe 7, thereby preventing oscillation of the oil surface 11a resulting from strong gas flow.
  • FIG. 13 is a cross-sectional view showing an exemplary configuration of the oil reservoir 11, the subframe 7, and surrounding parts of a compressor according to Embodiment 9.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • oil retaining means 17a covers a region including the bottom portion 15 and a part of the side face 16 in the vicinity of a surface 7a of the subframe 7 on the side of the electric motor mechanism 30 (on the side of the compression mechanism 20), and oil retaining means 17b covers the surface 7a of the subframe 7 on the side of the electric motor mechanism 30.
  • the oil retaining means 17b covers an area, surrounding the sub bearing 6, of the surface 7a in noncontact with the portion to be rotated.
  • the oil retaining means 17a provided on the bottom portion 15 and the side face 16 and the oil retaining means 17b provided on the subframe 7 are integrally connected to or in contact with each other.
  • the compressor according to Embodiment 9 also includes the subframe 7 that supports the end portion of the rotary shaft 2 on the side of the oil supply pipe 10, and the oil retaining means 17a and 17b extend to the portion of the subframe 7 on the side of the compression mechanism 20 along the side face 16 of the sealed container 40, and further cover the surface 7a of the subframe 7 on the side of the compression mechanism 20.
  • the aforementioned configuration allows the oil stored in the oil reservoir 11 to be supplied to the sub bearing 6 of the subframe 7 from the outside through the oil retaining means 17a and 17b, thereby improving the lubrication performance for the sliding surface of the sub bearing 6.
  • the sub bearing 6 can be lubricated even though a compressor without the oil path to supply the oil to the sub bearing 6 through the oil supply conduit 2a. Therefore, the technique adopted in the present invention can be applied to a broader range of products in Embodiment 9 than in other configurations.
  • FIG. 14 is a cross-sectional view showing an exemplary configuration of the oil retaining means 17 of a compressor according to Embodiment 10.
  • the same reference numerals denote constituent components having the same functions and providing the same effects as those in the compressor according to Embodiment 1, and a description thereof will not be repeated.
  • the porosity of the oil retaining means 17 has a stepwise or continuous spatial variation, and takes smaller values in areas farther from its upper portion and closer to its lower portion.
  • the oil retaining means 17 may include a first layer 17d, a second layer 17e, and a third layer 17f stacked in this order from the upper side to the lower side.
  • the porosity of the second layer 17e is lower than that of the first layer 17d, and the porosity of the third layer 17f is still lower than that of the second layer 17e.
  • the oil retaining means 17 is disposed such that at least the third layer 17f is dipped in the oil within the oil reservoir 11.
  • the suction port 10a of the oil supply pipe 10 is connected, for example, to the third layer 17f.
  • the present invention may be modified in various forms without limitations to Embodiments.
  • the present invention is also applicable to a semi-sealed compressor or an open compressor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Compressor (AREA)

Claims (12)

  1. Compresseur, comprenant :
    - un conteneur (40) ;
    - un arbre rotatif (2) supporté dans le conteneur (40) ;
    - un mécanisme de compression (20) qui est adapté pour comprimer un réfrigérant lors d'une rotation de l'arbre rotatif (2) ;
    - un conduit d'alimentation d'huile (2a) qui est formé à l'intérieur de l'arbre rotatif (2), et qui est adapté pour permettre à l'huile alimentée au mécanisme de compression (20) de s'écouler à travers celui-ci ;
    - un réservoir d'huile (11) prévu à l'intérieur du conteneur (40) dans une portion inférieure de celui-ci ; et
    - un tube d'alimentation d'huile (10) ayant un orifice connecté au conduit d'alimentation d'huile (2a) et un autre orifice (10a) disposé dans le réservoir d'huile (11),
    caractérisé par
    - un moyen de retenue d'huile (17) ayant une partie disposée dans le réservoir d'huile (11) et une autre partie disposée dans un espace à gaz au-dessus du réservoir d'huile (11), le moyen de retenue d'huile (17) contenant un grand nombre de vides afin de retenir l'huile, le tube d'alimentation d'huile (10) s'étendant depuis la portion terminale du conduit d'alimentation d'huile (2a) jusqu'au moyen de retenue d'huile (17).
  2. Compresseur selon la revendication 1,
    dans lequel le conteneur (40) est basculé de telle façon que l'arbre rotatif (2) est basculé par rapport à une direction verticale, et le tube d'alimentation d'huile (10) est cintré de telle façon que l'autre orifice (10a) de celui-ci fait face vers le bas dans une direction gravitationnelle et est situé au voisinage d'une portion tout à fait en bas du réservoir d'huile (11).
  3. Compresseur selon la revendication 1 ou 2,
    comprenant en outre un couvercle (18) qui couvre le moyen de retenue d'huile (17) à l'exception d'une portion dans laquelle le tube d'alimentation d'huile (10) est introduit, et qui est fixé au réservoir d'huile (11), le couvercle (18) ayant une portion de lui-même plongée dans l'huile à l'intérieur du réservoir d'huile (11), la portion incluant une ouverture (18a) qui est adaptée pour recevoir l'huile.
  4. Compresseur selon la revendication 3,
    dans lequel le couvercle (18) est formé avec une pluralité d'ouvertures (18b) qui pénètrent à travers celui-ci entre une surface du couvercle (18) sur un côté du moyen de retenue d'huile (17) et une autre surface du couvercle (18) sur un côté de l'espace à gaz.
  5. Compresseur selon la revendication 3 ou 4,
    dans lequel le couvercle (18) est formé avec une autre ouverture (18c) située autour du tube d'alimentation d'huile (10).
  6. Compresseur selon la revendication 1 ou 2,
    dans lequel le moyen de retenue d'huile (17) est fixé sur une surface de paroi du conteneur (40).
  7. Compresseur selon la revendication 6,
    dans lequel le moyen de retenue d'huile (17) est formé d'un élément à base de métal capable de maintenir une forme du moyen de retenue d'huile (17), et l'autre orifice (10o) du tube d'alimentation d'huile (10) est fixé par le moyen de retenue d'huile (17).
  8. Compresseur selon la revendication 7,
    dans lequel le tube d'alimentation d'huile (10) comporte une pluralité de coudes dans un trajet entre un orifice de celui-ci et l'autre orifice (10a) de celui-ci.
  9. Compresseur selon l'une quelconque des revendications 1 à 8,
    dans lequel le moyen de retenue d'huile (17) est fixé sur une portion périphérique extérieure du tube d'alimentation d'huile (10).
  10. Compresseur selon l'une quelconque des revendications 1 à 9, comprenant en outre un cadre (7) qui supporte une portion terminale de l'arbre rotatif (2) sur un côté du tube d'alimentation d'huile (10), dans lequel le moyen de retenue d'huile (17) est prévu sur une surface du cadre (7) sur un côté du tube d'alimentation d'huile (10).
  11. Compresseur selon l'une quelconque des revendications 1 à 9, comprenant en outre un cadre (7) qui supporte une portion terminale de l'arbre rotatif (2) sur un côté du tube d'alimentation d'huile (10), dans lequel le moyen de retenue d'huile (17) s'étend vers une surface du cadre (7) sur un côté du mécanisme de compression (20) le long d'une face latérale du conteneur (40), et est en outre formé sur la surface du cadre (7) sur le côté du mécanisme de compression (20).
  12. Compresseur selon l'une quelconque des revendications 1 à 11,
    dans lequel une porosité du moyen de retenue d'huile (17, 17d, 17e, 17f) présente une variation spatiale en gradins, et adopte des valeurs plus faibles dans des zones plus éloignées d'une portion supérieure de celui-ci et plus proches d'une portion inférieure de celui-ci.
EP14196423.9A 2013-12-10 2014-12-05 Compresseur Active EP2884106B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013255239 2013-12-10
JP2014106292A JP6234324B2 (ja) 2013-12-10 2014-05-22 圧縮機

Publications (2)

Publication Number Publication Date
EP2884106A1 EP2884106A1 (fr) 2015-06-17
EP2884106B1 true EP2884106B1 (fr) 2018-01-31

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Publication number Priority date Publication date Assignee Title
KR102585024B1 (ko) * 2016-01-05 2023-10-05 엘지전자 주식회사 히트펌프 모듈을 구비하는 의류처리장치
EP3572672B1 (fr) * 2017-01-18 2023-08-23 Mitsubishi Electric Corporation Compresseur et système à cycle de réfrigération
JP7206929B2 (ja) * 2019-01-11 2023-01-18 株式会社Soken 電動圧縮機
WO2023073889A1 (fr) * 2021-10-28 2023-05-04 三菱重工サーマルシステムズ株式会社 Unité de réfrigération de transport

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KR960000984B1 (ko) * 1993-04-26 1996-01-15 Lg전자 주식회사 횡형 로터리 압축기의 오일 토출방지장치
JPH09250465A (ja) * 1996-03-19 1997-09-22 Hitachi Ltd スクロ−ル圧縮機
JP3831456B2 (ja) * 1996-07-25 2006-10-11 三菱電機株式会社 スクロール圧縮機
JP2003269356A (ja) * 2002-03-18 2003-09-25 Sanyo Electric Co Ltd 横型ロータリコンプレッサ
JP2004278380A (ja) * 2003-03-14 2004-10-07 Mitsubishi Electric Corp 圧縮機
JP2004316537A (ja) * 2003-04-16 2004-11-11 Hitachi Ltd 流体圧縮機
JP2007100513A (ja) * 2005-09-30 2007-04-19 Sanyo Electric Co Ltd 冷媒圧縮機及びその冷媒圧縮機を備えた冷媒サイクル装置
JP2009162078A (ja) 2007-12-28 2009-07-23 Daikin Ind Ltd スクロール型圧縮機
JP5372703B2 (ja) 2009-10-30 2013-12-18 澤藤電機株式会社 横型振動圧縮機

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JP2015132254A (ja) 2015-07-23
EP2884106A1 (fr) 2015-06-17
JP6234324B2 (ja) 2017-11-22

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