KR20090040150A - Scroll compressor - Google Patents

Scroll compressor Download PDF

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Publication number
KR20090040150A
KR20090040150A KR1020070105782A KR20070105782A KR20090040150A KR 20090040150 A KR20090040150 A KR 20090040150A KR 1020070105782 A KR1020070105782 A KR 1020070105782A KR 20070105782 A KR20070105782 A KR 20070105782A KR 20090040150 A KR20090040150 A KR 20090040150A
Authority
KR
South Korea
Prior art keywords
flow path
oil
flow
sealed container
guide
Prior art date
Application number
KR1020070105782A
Other languages
Korean (ko)
Inventor
엄광노
Original Assignee
엘지전자 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020070105782A priority Critical patent/KR20090040150A/en
Publication of KR20090040150A publication Critical patent/KR20090040150A/en

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Classifications

    • 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
    • F04C29/026—Lubricant separation
    • 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
    • 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
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • 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
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

Abstract

The scroll compressor according to the present invention is installed in the inner space of the hermetically sealed container and includes an oil separation member inside the flow guide for moving the flow direction of the fluid discharged into the inner space of the hermetically sealed container, thereby discharging it from the compression chamber. The oil can be effectively separated from the refrigerant gas to prevent the oil from leaking out of the sealed container.

Description

Scroll Compressor {SCROLL COMPRESSOR}

The present invention relates to a scroll compressor.

Generally, scroll compressor is a high efficiency, low noise compressor widely used in the air conditioner field. In the scroll compressor, two pairs of compression chambers are formed between two scrolls while the two scrolls rotate relative to each other, and the compression chamber continuously moves in the center direction to decrease the volume, so that the refrigerant is continuously sucked and compressed. It is a discharge method.

The scroll compressor may be classified into a low pressure type and a high pressure type according to whether an intake gas or an outlet gas is filled in the sealed container. The high pressure scroll compressor is configured such that the inside of the sealed container is maintained at a high pressure, and the gas suction pipe is directly connected to the compression mechanism. Accordingly, the refrigerant is directly sucked into the suction port of the fixed scroll through the gas suction pipe, compressed in the compression chamber and discharged to the upper space of the sealed container, and then moved to the lower space of the sealed container, and then frozen through the gaseous discharge pipe. Discharged to the cycle system.

However, in the conventional high pressure scroll compressor as described above, although a certain amount of oil is contained in the refrigerant discharged from the compression chamber to the upper space of the sealed container, the refrigerant is moved to the lower space of the sealed container so that the gas flow pipe There was a problem that a large amount of oil is swept away with the gas is discharged to the system while being discharged at a high speed toward. In addition, this causes a lack of oil in the compressor, which causes wear on various frictional parts, and greatly reduces the reliability of the compressor. As a result, excessive oil flows into the system, thereby degrading the performance of the entire system. .

The present invention has been made in view of the problems of the conventional scroll compressor as described above, so that the oil can be easily separated from the refrigerant discharged from the compression chamber to the inner space of the sealed container to shorten the oil shortage in the compressor in advance. It is an object of the present invention to provide a scroll compressor that can be prevented.

In order to achieve the object of the present invention, a sealed container; A frame fixedly installed in the inner space of the sealed container; A driving motor installed in the sealed container to generate a driving force; A compression unit compressing the refrigerant while the two scrolls are moved relative to each other by receiving the driving force of the driving motor; At least one flow path guide provided with a flow path such that the fluid discharged from the compression unit into the inner space of the sealed container flows, and a flow direction of the fluid flowing through the flow path is varied within the flow path; And an oil separation member installed on the flow path guide to separate oil from the refrigerant passing through the flow path guide.

In the scroll compressor according to the present invention, by installing a flow path guide in the middle of the flow path of the refrigerant and installing an oil separating member inside the flow guide, the oil in the refrigerant gas discharged from the compression chamber inside the sealed container. By separating effectively, oil can be prevented from leaking out of the sealed container.

Hereinafter, the scroll compressor according to the present invention will be described in detail with reference to the embodiment shown in the accompanying drawings.

As shown in FIG. 2, the high pressure scroll compressor according to the present invention includes a sealed container 10 having a sealed inner space such that a predetermined amount of oil is filled, a high pressure state is maintained, and a gas discharge pipe DP is connected; A driving motor installed between the main frame 20 and the subframe 30 fixed to upper and lower sides of the sealed container 10 and between the main frame 20 and the subframe 30 to generate rotational force ( 40 and the fixed scroll 50 is fixedly installed on the upper surface of the main frame 20 and the gas suction pipe SP is directly coupled to the fixed scroll 50 on the upper surface of the main frame 20. The swinging scroll (6) having two pairs of compression chambers (P) formed during the swinging movement, and installed between the swinging scroll (6) and the main frame (20) to prevent rotation of the swinging scroll (6). The old dam ring 70 to rotate while being installed in the sealed container 10, the mill Flow path guide (80) for guiding the refrigerant moving from the upper space (S1) to the lower space (S2) of the waste container 10, and oil separation is provided in the flow path guide 80 to separate the refrigerant and oil Member 90 is included.

The airtight container 10 is installed in the upper space (S1) around the main frame 20, the gas suction pipe (SP) is in direct communication with the suction port 52 of the fixed scroll (50) while the main frame ( The gas discharge pipe DP communicates with the lower space S2 around the center 20.

The main frame 20 has its outer circumferential surface tightly coupled to the inner circumferential surface of the hermetic container 10 by welding, and the gas discharge pipe DP has a main frame (DP) at a suitable location along the outer circumferential surface of the main frame 20. 20, the discharge gas discharged into the upper space S1 of the sealed container 10 through the fixed scroll 50 moves to the lower space S2 as it is installed on the opposite side of the fixed scroll 50. Thus, a plurality of gas communication grooves 21 are formed to be guided to the gas discharge pipe DP.

The drive motor 40 includes a stator 41 inserted into and fixed to an inner circumferential surface of the hermetic container 10, a rotor 42 rotatably coupled to a predetermined gap inside the stator 41, and the It consists of a drive shaft 43 is pressed into the center of the rotor 42 to transmit the rotational force to the swing scroll (60).

The fixed scroll (50) has a fixed wrap (51) forming a pair of compression chambers (P) on the bottom surface of the hard plate portion is formed in the involute shape, the gas suction pipe (SP) on the side of the hard plate portion The inlet 52 is formed to communicate with each other, and the discharge port 53 communicates with the center of the upper surface of the hard plate part so that the compressed refrigerant is discharged into the upper space S1 of the sealed container 10. The gas passage groove 54 is formed at the edge of the hard plate portion so as to be connected to the gas communication groove 21 of the main frame 20.

The orbiting scroll 60 is formed on the upper surface of the hard plate portion and the orbiting wrap 61 forming a pair of compression chambers P together with the stationary wrap 51 of the fixed scroll 50 is formed in an involute shape. In the center of the bottom surface of the hard plate portion, the driving shaft 43 is coupled to form a boss portion (unsigned) to receive the power of the driving motor 40.

As shown in FIG. 2, the flow guide 80 has a fluid in which the first flow path part 81 is engraved in the axial direction of the driving motor 40, and rotates at the lower end of the first flow path part 81. The second flow path portion 82 is formed in a negative direction in the direction, that is, the circumferential direction.

The outlet of the second flow path part 82 is formed to open toward the gas discharge pipe DP, and the outlet area of the second flow path part 82 is larger than the inlet area of the gas discharge pipe DP. Can be formed equally. In this case, the flow path guide 80 may be disposed such that at least a part of the gas discharge pipe DP overlaps with the outlet of the second flow path part 82. Of course, the outlet area of the second flow path part 82 may be formed to be smaller than the inlet area of the gas discharge pipe DP, and the gas discharge pipe DP is within the outlet range of the second flow path part 82. It may be arranged so that it does not overlap.

3 and 4, the oil filtered by the oil separating member 90 may be recovered to the lower side of the sealed container 10 in the middle of the second flow path part 82. The oil recovery hole 83 is formed to be able to. Here, the oil recovery hole 83 may be formed to be cut up to both the upper and lower sides and the front surface therebetween in the cross-sectional projection as shown in FIG. In addition, the oil recovery hole 83 may be formed as a single hole, or a plurality of oil recovery holes 83 may be formed by drilling.

The oil separating member 90 may be formed of a mesh as shown in FIGS. 2 to 5. In this case, the oil separating member 90 may be located only upstream of the oil recovery hole 83 or evenly formed to the outlet of the flow guide 80 upstream of the oil recovery hole 83. In addition, the oil separation member 90 may be formed of a plate body having a plurality of holes 91 as shown in FIG. In this case, the oil separation member 90 may be disposed at a predetermined interval at the upstream side of the oil recovery hole 83 and the outlet of the flow guide 80, respectively.

The oil separation member 90 may be welded or fixed by a separate fixing ring such that the oil separating member 90 does not fall out of the flow guide 80.

On the other hand, as shown in Figure 7, the plurality of flow path guides may be arranged at a predetermined interval. For example, the first flow path guide 110 may change the flow direction of the refrigerant from the axial direction to the circumferential direction, and the second flow path guide 120 may change the flow direction of the refrigerant from the circumferential direction to the axial direction. In this case, the oil separation member 90 may be installed by forming the first flow guide 110 in the same manner as in the above-described embodiment.

High pressure scroll compressor of the present invention as described above has the following effects.

That is, while the drive shaft 43 rotates with the rotor 42 by the power applied to the drive motor 40, the turning scroll 6 rotates by an eccentric distance, and the turning scroll 6 Is formed in a pair of compression chambers (P) whose volume decreases while continuously moving between the fixed scroll (50) and suction-compresses and discharges the refrigerant gas.

Here, the refrigerant gas is sucked directly into the suction port 52 of the fixed scroll 50 through the gas suction pipe (SP) is compressed in the compression chamber (P) and the upper space of the sealed container 10 through the discharge port 53 ( S1) is discharged, the discharge gas passes through the gas communication groove 21 of the main frame 20 to move to the lower space (S2) of the sealed container (10).

In this process, the discharge gas passing through the gas communication groove 21 of the main frame 20 passes through the first flow path part 81 and the second flow path part 82 of the flow path guide 80 and the flow direction thereof is changed. The rotor 42 is changed from the axial direction to the circumferential direction in the rotational direction, and thus, the discharge gas has a kind of cyclone phenomenon in the inner space of the hermetically sealed container 10 and the second of the flow path guide 80. As the oil separating member 90 is installed in the flow path 82, oil is easily separated from the refrigerant passing through the oil separating member 90. At this time, the refrigerant separated by the oil separation member 90 flows in the circumferential direction of the hermetic container 10 and cools the upper winding coil of the driving motor 40 through the gas discharge pipe DP. While moving to the refrigeration cycle, the oil separated by the oil separation member 90 is recovered to the lower side of the sealed container 10 through the oil recovery hole 83 of the second flow path portion 82.

In this way, as the oil discharged together with the refrigerant gas in the compression chamber is easily separated and recovered from the refrigerant gas in the process of passing through the flow path guide, the risk of oil leaking into the refrigeration cycle may be significantly reduced.

1 is a cross-sectional view showing an example of the high-pressure scroll compressor of the present invention,

Figure 2 is a perspective view showing the inside of the sealed container according to Figure 1,

Figure 3 is a perspective view of the flow guide according to Figure 1 from the inside,

4 is a longitudinal cross-sectional view schematically showing the flow guide according to FIG.

5 and 6 are a perspective view showing another embodiment of the flow guide according to FIG.

7 is a perspective view showing another embodiment of the flow guide in the high-pressure scroll compressor of the present invention.

Claims (11)

Airtight containers; A frame fixedly installed in the inner space of the sealed container; A driving motor installed in the sealed container to generate a driving force; A compression unit compressing the refrigerant while the two scrolls are moved relative to each other by receiving the driving force of the driving motor; At least one flow path guide provided with a flow path such that the fluid discharged from the compression unit into the inner space of the sealed container flows, and a flow direction of the fluid flowing through the flow path is varied within the flow path; And And an oil separating member installed at the flow guide to separate oil from the refrigerant passing through the flow guide. The method of claim 1, The oil separating member is a scroll compressor formed of a mesh. The method of claim 1, The oil separating member is a scroll compressor is formed of a plurality of perforated plate body. The method of claim 1, The flow guide is a scroll compressor that is formed such that the flow direction of the fluid is changed from the axial direction to the circumferential direction. The method of claim 1, The flow guide is a scroll compressor comprising a first flow path portion for guiding the flow direction of the fluid in the axial direction, and a second flow path portion extending from the end of the first flow path portion to guide the flow direction of the fluid in the circumferential direction. The method of claim 5, An oil recovery hole is formed in the second flow path portion so that the oil is recovered to the lower side of the sealed container through the oil recovery hole. The method of claim 6, And the oil recovery hole is formed in the bottom surface of the second flow path portion. The method of claim 6, And the oil recovery hole is formed on at least two surfaces when projecting the second flow path. The method of claim 5, And the oil separation member is disposed such that at least a portion thereof is located upstream of the oil recovery hole. The method of claim 1, And the outlet of the flow guide is formed in a direction opposite to the discharge tube communicating with the inner space of the sealed container. The method of claim 10, And the flow guide is arranged such that at least part of the discharge pipe is located within an axial range of the flow guide.
KR1020070105782A 2007-10-19 2007-10-19 Scroll compressor KR20090040150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070105782A KR20090040150A (en) 2007-10-19 2007-10-19 Scroll compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070105782A KR20090040150A (en) 2007-10-19 2007-10-19 Scroll compressor

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011121320A3 (en) * 2010-03-30 2012-06-21 Edwards Limited Scroll compressor with an integrated inlet filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011121320A3 (en) * 2010-03-30 2012-06-21 Edwards Limited Scroll compressor with an integrated inlet filter
US9297382B2 (en) 2010-03-30 2016-03-29 Edwards Limited Scroll compressor

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