US20070256553A1 - Compressor - Google Patents
Compressor Download PDFInfo
- Publication number
- US20070256553A1 US20070256553A1 US11/789,945 US78994507A US2007256553A1 US 20070256553 A1 US20070256553 A1 US 20070256553A1 US 78994507 A US78994507 A US 78994507A US 2007256553 A1 US2007256553 A1 US 2007256553A1
- Authority
- US
- United States
- Prior art keywords
- refrigerant
- bolt fastening
- chamber
- fastening hole
- bolt
- 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.)
- Abandoned
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 82
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims description 19
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
Images
Classifications
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- 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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1081—Casings, housings
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- 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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
- F04B27/0878—Pistons
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- 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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1009—Distribution members
- F04B27/1018—Cylindrical distribution members
-
- 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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1045—Cylinders
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- 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
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/12—Kind or type gaseous, i.e. compressible
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/30—Retaining components in desired mutual position
- F05B2260/301—Retaining bolts or nuts
-
- 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
Definitions
- the present invention relates to a compressor, and more particularly, to a compressor, which has a bolt-cooling part formed between a suction chamber and a bolt fastening hole formed at a position, where the suction chamber and a discharge chamber of a housing are partitioned from each other, for allowing for a flow of refrigerant toward the bolt fastening hole to reduce an influence of temperature of discharged refrigerant, thereby preventing loosening of a bolt due to a thermal expansion, and improving durability.
- a compressor for a vehicle inhales refrigerant gas evaporated and discharged from an evaporator, converts it into liquefiable refrigerant gas of a high-temperature and high-pressure state, and discharges the converted refrigerant gas to a condenser.
- a swash plate type compressor in which pistons perform a reciprocating motion by a rotation of an inclined swash plate
- a scroll type compressor performing a compression by a rotating motion of two scrolls
- a vane rotary type compressor performing a compression by a rotary vane
- the compressor as a reciprocating type compressor for compressing refrigerant according to the reciprocating motion of the pistons, there are a crank type compressor and a wobble plate type compressor as well as the swash plate type compressor.
- the swash plate type compressor is classified into a fixed capacity swash plate type compressor and a variable capacity swash plate type compressor according to a use purpose.
- FIGS. 1 and 2 illustrate a fixed capacity swash plate type compressor according to a prior art. Referring to the drawings, the fixed capacity swash plate type compressor will be described in brief.
- the swash plate type compressor 1 includes a front housing 10 having a front cylinder block 20 embedded therein, and a rear housing 10 a coupled with the front housing 10 and having a rear cylinder block 20 a embedded therein.
- the front and rear housings 10 and 10 a respectively have discharge chambers 12 and suction chambers 11 formed inside and outside a partition wall 13 in correspondence with a refrigerant discharge hole and a refrigerant suction hole of a valve plate 61 , which will be described later.
- the discharge chamber 12 includes a first discharge chamber 12 a formed inside the partition wall 13 , and a second discharge chamber 12 b formed outside the partition wall 13 , partitioned from the suction chamber 11 , and fluidically communicated with the first discharge chamber 12 a through a discharge hole 12 c. That is, the second discharge chamber 12 b is partitioned from the suction chamber 11 by partition walls 16 b and 17 formed at both sides of the second discharge chamber 12 b.
- the refrigerant of the first discharge chamber 12 a is reduced while passing through the discharge hole 12 c of a small diameter but expanded while moving to the second discharge chamber 12 b.
- a pulsating pressure drops during the process that the refrigerant is reduced and expanded, so that vibration and noise can be reduced.
- a plurality of bolt fastening holes 16 and 16 a are formed in a circumferential direction of the suction chamber 11 .
- Bolts 80 are inserted and fastened to the bolt fastening holes 16 and 16 a in a state where the front and rear cylinder blocks 20 and 20 a and valve units 60 are assembled between the front housing 10 and the rear housing 10 a.
- front and rear cylinder blocks 20 and 20 a respectively have a plurality of cylinder bores 21 formed in both directions of a swash plate chamber 24 formed between the front cylinder block 20 and the rear cylinder block 20 a.
- a plurality of pistons 50 are mounted in the cylinder bores 21 of the front and rear cylinder blocks 20 and 20 a, which are located correspondingly to each other, in such a way as to perform a straight reciprocating motion.
- the pistons 50 are combined to a swash plate 40 by interposing shoes 45 between the pistons 50 and the swash plate 40 inclinedly mounted on a driving shaft 30 .
- the pistons 50 perform the reciprocating motion inside the cylinder bores 21 of the front and rear cylinder blocks 20 and 20 a in cooperation with the swash plate 40 rotating together with the driving shaft 30 .
- valve units 60 are respectively mounted between the front housing 10 and the front cylinder block 20 and between the rear housing 10 a and the rear cylinder block 20 a.
- each valve unit 60 includes a valve plate 61 having a refrigerant suction hole and a refrigerant discharge hole, and a suction lead valve 63 and a discharge lead valve 62 mounted at both sides thereof.
- valve units 60 are respectively assembled between the front housing 10 and the front cylinder block 20 and between the rear housing 10 a and the rear cylinder block 20 a.
- the valve units 60 can be assembled in a position-fixed state since fixing pins 65 formed at both sides of the valve plates 61 are inserted into fixing holes 15 formed on faces of the front and rear housings 10 and 10 a and faces of the front and rear cylinder blocks 20 and 20 a, which are located opposite with each other.
- a plurality of suction passageways are formed on the front and rear cylinder blocks 20 and 20 a so that the refrigerant supplied to the swash plate chamber 24 disposed between the front and rear cylinder blocks 20 and 20 a can flow to each suction chamber 11 .
- the second discharge chambers 12 b of the front and rear housings 10 and 10 a are fluidically communicated with each other by a communication passageway 23 perforating through the front and rear cylinder blocks 20 and 20 a.
- the compressor can simultaneously perform suction and compression actions of the refrigerant inside the cylinder bores 21 of the front and rear cylinder blocks 20 and 20 a according to the reciprocating motion of the pistons 50 .
- front and rear cylinder blocks 20 and 20 a respectively have support holes 25 formed at the center thereof to support the driving shaft 30 , and a needle roller bearing 26 is interposed between the driving shaft 30 and the support hole 25 to rotatably support the driving shaft 30 .
- a muffler 70 is mounted on the upper portion of the outer peripheral surface of the rear housing 10 a to supply the refrigerant transmitted from the evaporator to the compressor 1 during a suction stroke of the pistons 50 but discharge the refrigerant compressed in the compressor 1 toward the condenser during a compression stroke of the pistons 50 .
- the refrigerant supplied from the evaporator is inhaled to a suction part of the muffler 70 , supplied to the swash plate chamber 24 formed between the front cylinder block 20 and the rear cylinder 20 a through the refrigerant suction hole 71 , and then, moves to the suction chambers 11 of the front and rear housings 10 and 10 a along the suction passageways formed in the front and rear cylinder blocks 20 and 20 a.
- the suction lead valve 63 is opened during the suction stroke of the pistons 50 , and in this instance, the refrigerant contained in the suction chamber 11 is inhaled into the cylinder bores 21 .
- the refrigerant contained in the cylinder bores 21 is compressed during the compression stroke of the pistons 50 , and in this instance, when the discharge lead valve 6 is opened, the refrigerant flows to the first discharge chambers 12 a of the front and rear housings 10 and 10 a, passes through the second discharge chambers 12 b, and finally is discharged to a discharge part of the muffler 70 through the refrigerant discharge hole 72 of the muffler 72 . After that, the refrigerant discharged to the muffler 70 flows to the condenser.
- the refrigerant compressed in the cylinder bores 21 of the front cylinder block 20 is discharged to the first discharge chamber 12 a of the front housing 10 , moves to the second discharge chamber 12 b, and then, moves to the second discharge chamber 12 b of the rear housing 10 a along the communication passageway 23 formed in the front and rear cylinder blocks 20 and 20 a.
- the refrigerant flowing to the second discharge chamber 12 b is mixed with the refrigerant contained in the second discharge chamber 12 b, and then, discharged to the discharge part of the muffler 70 through the refrigerant discharge hole 72 .
- one of the plural bolt fastening holes 16 and 16 a formed in the circumferential direction of the suction chamber is formed at a partition wall 16 b where the second discharge chamber 12 b is partitioned from the suction chamber 11 .
- the high-temperature and high-pressure refrigerant discharged from the cylinder bores 21 to the first discharge chamber 12 a is discharged to the muffler 70 after passing through the second discharge chamber 12 b.
- the high temperature of the refrigerant passing through the second discharge chamber 12 b is transferred to the bolt fastening hole 16 a through the partition wall 16 b, which is in contact with the second discharge chamber 12 b.
- the bolt fastening hole 16 a is thermally expanded due to an influence of temperature of the discharged refrigerant, the bolt 80 coupled with the bolt fastening hole 16 a gets loose and the refrigerant existing in an area of the bolt fastening hole 16 a is leaked.
- the present invention has been made to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide a compressor, which has a bolt-cooling part formed between a suction chamber and a bolt fastening hole formed at a position, where the suction chamber and a discharge chamber are partitioned from each other, for allowing for a flow of refrigerant toward the bolt fastening hole to reduce an influence of temperature of discharged refrigerant, thereby preventing loosening of a bolt due to a thermal expansion, preventing leakage of the refrigerant, and improving durability.
- a compressor comprising: front and rear housings, each housing having a plurality of bolt fastening holes formed in a circumferential direction therein, a suction chamber and a discharge chamber partitioned from each other by partition walls formed therebetween, and a bolt-cooling part formed between the suction chamber and the bolt fastening hole formed at the partition wall where the suction chamber and the discharge chamber are partitioned from each other to allow for a flow of refrigerant toward the bolt fastening hole; front and rear cylinder blocks mounted between the front housing and the rear housing; and a plurality of pistons mounted inside cylinder bores of the front and rear cylinder blocks for performing a reciprocating motion in cooperation with a rotating motion of a swash plate rotating in a swash plate chamber.
- FIG. 1 is a sectional view of a compressor according to a prior art
- FIG. 2 is a sectional view taken along the line of A-A of FIG. 1 ;
- FIG. 3 is a sectional view of a compressor according to the present invention.
- FIG. 4 is a sectional view taken along the line of B-B of FIG. 3 .
- FIG. 3 is a sectional view of a compressor according to the present invention
- FIG. 4 is a sectional view taken along the line of B-B of FIG. 3 .
- the compressor 1 includes: front and rear housings 10 and 10 a respectively having discharge chambers 12 and suction chambers 11 formed therein, the discharge chamber 12 being partitioned from the suction chamber 11 by a partition wall 13 formed therebetween; front and rear cylinder blocks 20 and 20 a mounted between the front housing 10 and the rear housing 10 a and having a plurality of cylinder bores 21 formed in both directions of a swash plate chamber 24 formed between the front cylinder block 20 and the rear cylinder block 20 a; a driving shaft 30 rotatably supported on the front and rear cylinder blocks 20 and 20 a; a swash plate 40 rotating together with the driving shaft 30 ; and a plurality of pistons 50 combined to the outer periphery of the swash plate 40 by interposing shoes 45 between the swash plate 40 and the pistons 50 and performing a reciprocating motion inside the cylinder bores 21 .
- each of the discharge chambers 12 of the front and rear housings 10 and 10 a includes: a first discharge chamber 12 a formed inside a partition wall 13 ; and a second discharge chamber 12 b formed outside the partition wall 13 , partitioned from the suction chamber 11 , and fluidically communicated with the first discharge chamber 12 a through a discharge hole 12 c. That is, the second discharge chamber 12 b is partitioned from the suction chamber 11 by partition walls 16 b and 17 formed at both sides of the second discharge chamber 12 b.
- refrigerant of the first discharge chamber 12 a is reduced while passing through the discharge hole 12 c of a small diameter but expanded while moving to the second discharge chamber 12 b, and so, a pulsating pressure drops during the process that the refrigerant is reduced and expanded, whereby vibration and noise can be reduced.
- a plurality of bolt fastening holes 16 and 16 a are formed in a circumferential direction of the suction chambers 11 of the front and rear housings 10 and 10 a. So, the front and rear housings 10 and 10 a can be coupled and fixed with each other by fastening bolts 80 into the bolt fastening holes 16 and 16 a in a state where the front and rear cylinder blocks 20 and 20 a and valve units 60 are assembled between the front and rear housings 10 and 10 a.
- the front and rear cylinder blocks 20 and 20 a respectively have a plurality of suction passageways (not shown) formed in such a way that inhaled refrigerant supplied to the swash plate chamber 24 disposed between the front cylinder block 20 and the rear cylinder block 20 a flows to each suction chamber 11 .
- the second discharge chambers 12 b of the front and rear housings 10 and 10 a are fluidically communicated with each other via the communication passageway 23 perforating through the front and rear cylinder blocks 20 and 20 a.
- each valve unit 60 is respectively assembled between the front housing 10 and the front cylinder block 20 and between the rear housing 10 a and the rear cylinder block 20 a.
- Each valve unit 60 includes a suction lead valve 63 , a valve plate 61 having a refrigerant suction hole and a refrigerant discharge hole, and a discharge lead valve 62 , which are formed in order from a direction of the front and rear cylinder blocks 20 and 20 a.
- valve units 60 are combined and fixed to the front and rear housings 10 and 10 a and the front and rear cylinder blocks 20 and 20 a in such a way that fixing pins 65 formed at both sides of the valve units 60 are inserted into fixing holes 15 formed on faces of the front and rear housings 10 and 10 a and faces of the front and rear cylinder blocks 20 and 20 a, which are located opposite with each other.
- front and rear cylinder blocks 20 and 20 a respectively have support holes 25 formed at the center thereof for supporting the driving shaft 30 , and needle roller bearings 26 are respectively mounted in the support holes 25 to rotatably support the driving shaft 30 .
- a muffler 70 is mounted on the upper portion of the outer peripheral surface of the rear housing 10 a to supply the refrigerant transferred from an evaporator to the compressor 1 through a refrigerant suction hole 71 during a suction stroke of the pistons 50 and to discharge the refrigerant compressed in the compressor 1 toward a condenser through a refrigerant discharge hole 72 during a compression stroke of the pistons 50 .
- Such a compressor 1 is operated by selectively receiving driving power of an engine by a restriction action of an electronic clutch (not shown).
- one of the plural bolt fastening holes 16 and 16 a formed on the circumference of the suction chamber 11 is formed at a partition wall 16 b where the second discharge chamber 12 b is partitioned from the suction chamber 11 .
- a bolt-cooling part 100 is formed between the suction chamber 11 and the bolt fastening hole 16 a, which is formed at the partition wall 16 b where the second discharge chamber 12 b is partitioned from the suction chamber 11 , to allow for a flow of the refrigerant toward the bolt fastening hole 16 a.
- the bolt-cooling part 100 allows that some of the inhaled refrigerant flows toward the bolt fastening hole 16 a, so that the bolt fastening hole 16 a is cooled by the inhaled refrigerant to thereby prevent an influence of temperature of the discharged refrigerant and loosening of the bolt 80 by a thermal expansion.
- the bolt-cooling part 100 is constructed by tieredly forming a communication passageway 101 on the partition wall 16 b on which the bolt fastening hole 16 a is formed to fluidically communicate the suction chamber 11 and the bolt fastening hole 16 a with each other, and so, the bolt fastening hole 16 a can be communicated with the suction chamber 11 and the swash plate chamber 24 . So, the inhaled refrigerant introduced into the swash plate chamber 24 flows toward the bolt fastening hole 16 a, and the inhaled refrigerant flowing to the bolt fastening hole 16 a moves to the suction chamber 11 through the communication passageway 101 .
- the compressor 1 has additional refrigerant flow channel (C) where the refrigerant flows to the suction chamber 11 through the bolt fastening hole 16 a.
- C refrigerant flow channel
- the front and rear cylinder blocks 20 and 20 a and the valve units 60 respectively have through holes 22 to which the bolts 80 are inserted and fastened to couple and fix the front and rear housings 10 and 10 a with each other via the bolts 80 . So, the refrigerant inhaled to the swash plate chamber 24 can flow to the bolt fastening hole 16 a through the through holes 22 , and the inhaled refrigerant flowing to the bolt fastening hole 16 a moves to the suction hole 11 through the communication passageway 101 .
- the communication passageway 101 serves to flow the inhaled refrigerant of the swash plate chamber 24 to the suction chamber 11 through the bolt fastening hole 16 and to circulate the refrigerant of the suction chamber 11 toward the bolt fastening hole 16 a. That is, since the communication passageway 101 is formed in an “U” shape fluidically communicating with the bolt fastening hole 16 a, the refrigerant of the suction chamber 11 and oil mixed with the refrigerant can be circulated while passing through the bolt fastening hole 16 a through the communication passageway 101 , whereby the cooling effect is maximized.
- some of the refrigerant contained in the suction chamber 11 can flow toward the bolt fastening hole 16 a and move to the swash plate chamber 24 through the communication passageway 101 by the rotating motion of the swash plate 40 in the swash plate chamber 24 .
- a good cooling effect can be obtained while the refrigerant passes through the bolt fastening hole 16 a.
- the bolt-cooling part 100 is formed between the suction chamber 11 and the bolt fastening hole 16 a, which is located at the partition wall 16 b where the discharge chamber 12 is partitioned from the suction chamber 11 , out of the plural bolt fastening holes 16 and 16 a formed in the circumferential direction of the suction chambers 11 of the front and rear housings 10 and 10 a, so that the inhaled refrigerant flows toward the bolt fastening hole 16 a to cool the bolt fastening hole 16 a.
- the high-pressure and high-temperature refrigerant discharged from the cylinder bores 21 moves to the first discharge chambers 12 a of the front and rear housings 10 and 10 a, moves to the second discharge chambers 12 b through the discharge hole 12 c, and then, moves to the condenser through the refrigerant discharge hole 72 of the muffler 70 .
- the discharged refrigerant passing through the second discharge chamber 12 b is the high-pressure and high-temperature refrigerant, and the high temperature of the refrigerant is transferred to components adjacent to the refrigerant.
- the bolt fastening hole 16 a is cooled by the bolt-cooling part 100 to thereby prevent the thermal expansion and loosening of the bolt 80 .
- the present invention is described in connection with an example that the structure having the bolt-cooling part 100 to allow the flow of the inhaled refrigerant toward the bolt fastening hole 16 a, which is in contact with the second discharge chamber 12 b, is applied to the fixed capacity swash plate type compressor 1 , but is not restricted to the above, and can be applied to compressors of various kinds, such as a variable capacity swash plate type compressor, a motor driven compressor and others, in the same method and structure as the above to obtain the same effects.
- the compressor can prevent loosening of the bolt due to the thermal expansion, prevent a leakage of the refrigerant, and improve durability, since the bolt-cooling part is formed between the suction chamber and the bolt fastening hole formed at a position, where the suction chamber and the discharge chamber are partitioned from each other, for allowing for a flow of refrigerant toward the bolt fastening hole to reduce an influence of temperature of discharged refrigerant.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Compressor (AREA)
Abstract
The present invention relates to a compressor, which has a bolt-cooling part formed between a suction chamber and a bolt fastening hole formed at a position, where the suction chamber and a discharge chamber of a housing are partitioned from each other, for allowing for a flow of refrigerant toward the bolt fastening hole to reduce an influence of temperature of discharged refrigerant, thereby preventing loosening of a bolt due to a thermal expansion, and improving durability.
Description
- 1. Field of the Invention
- The present invention relates to a compressor, and more particularly, to a compressor, which has a bolt-cooling part formed between a suction chamber and a bolt fastening hole formed at a position, where the suction chamber and a discharge chamber of a housing are partitioned from each other, for allowing for a flow of refrigerant toward the bolt fastening hole to reduce an influence of temperature of discharged refrigerant, thereby preventing loosening of a bolt due to a thermal expansion, and improving durability.
- 2. Background Art
- In general, a compressor for a vehicle inhales refrigerant gas evaporated and discharged from an evaporator, converts it into liquefiable refrigerant gas of a high-temperature and high-pressure state, and discharges the converted refrigerant gas to a condenser.
- For such a compressor, there are various kinds, such as a swash plate type compressor in which pistons perform a reciprocating motion by a rotation of an inclined swash plate, a scroll type compressor performing a compression by a rotating motion of two scrolls, a vane rotary type compressor performing a compression by a rotary vane, and so on.
- Out of the above kinds of the compressor, as a reciprocating type compressor for compressing refrigerant according to the reciprocating motion of the pistons, there are a crank type compressor and a wobble plate type compressor as well as the swash plate type compressor. In addition, the swash plate type compressor is classified into a fixed capacity swash plate type compressor and a variable capacity swash plate type compressor according to a use purpose.
-
FIGS. 1 and 2 illustrate a fixed capacity swash plate type compressor according to a prior art. Referring to the drawings, the fixed capacity swash plate type compressor will be described in brief. - As shown in the drawings, the swash
plate type compressor 1 includes afront housing 10 having afront cylinder block 20 embedded therein, and arear housing 10 a coupled with thefront housing 10 and having arear cylinder block 20 a embedded therein. - Here, the front and
rear housings discharge chambers 12 andsuction chambers 11 formed inside and outside apartition wall 13 in correspondence with a refrigerant discharge hole and a refrigerant suction hole of avalve plate 61, which will be described later. - Here, the
discharge chamber 12 includes afirst discharge chamber 12 a formed inside thepartition wall 13, and asecond discharge chamber 12 b formed outside thepartition wall 13, partitioned from thesuction chamber 11, and fluidically communicated with thefirst discharge chamber 12 a through adischarge hole 12 c. That is, thesecond discharge chamber 12 b is partitioned from thesuction chamber 11 bypartition walls second discharge chamber 12 b. - Accordingly, the refrigerant of the
first discharge chamber 12 a is reduced while passing through thedischarge hole 12 c of a small diameter but expanded while moving to thesecond discharge chamber 12 b. A pulsating pressure drops during the process that the refrigerant is reduced and expanded, so that vibration and noise can be reduced. - Meanwhile, a plurality of bolt fastening
holes suction chamber 11.Bolts 80 are inserted and fastened to thebolt fastening holes valve units 60 are assembled between thefront housing 10 and therear housing 10 a. - In addition, the front and
rear cylinder blocks cylinder bores 21 formed in both directions of aswash plate chamber 24 formed between thefront cylinder block 20 and therear cylinder block 20 a. A plurality ofpistons 50 are mounted in thecylinder bores 21 of the front andrear cylinder blocks pistons 50 are combined to aswash plate 40 by interposingshoes 45 between thepistons 50 and theswash plate 40 inclinedly mounted on adriving shaft 30. - Therefore, the
pistons 50 perform the reciprocating motion inside the cylinder bores 21 of the front andrear cylinder blocks swash plate 40 rotating together with thedriving shaft 30. - In addition, the
valve units 60 are respectively mounted between thefront housing 10 and thefront cylinder block 20 and between therear housing 10 a and therear cylinder block 20 a. - Here, each
valve unit 60 includes avalve plate 61 having a refrigerant suction hole and a refrigerant discharge hole, and asuction lead valve 63 and adischarge lead valve 62 mounted at both sides thereof. - As described above, the
valve units 60 are respectively assembled between thefront housing 10 and thefront cylinder block 20 and between therear housing 10 a and therear cylinder block 20 a. In this instance, thevalve units 60 can be assembled in a position-fixed state since fixingpins 65 formed at both sides of thevalve plates 61 are inserted intofixing holes 15 formed on faces of the front andrear housings rear cylinder blocks - Meanwhile, a plurality of suction passageways (not shown) are formed on the front and
rear cylinder blocks swash plate chamber 24 disposed between the front andrear cylinder blocks suction chamber 11. Thesecond discharge chambers 12 b of the front andrear housings communication passageway 23 perforating through the front andrear cylinder blocks - Therefore, the compressor can simultaneously perform suction and compression actions of the refrigerant inside the
cylinder bores 21 of the front andrear cylinder blocks pistons 50. - Moreover, the front and
rear cylinder blocks support holes 25 formed at the center thereof to support thedriving shaft 30, and a needle roller bearing 26 is interposed between thedriving shaft 30 and thesupport hole 25 to rotatably support thedriving shaft 30. - Meanwhile, a
muffler 70 is mounted on the upper portion of the outer peripheral surface of therear housing 10 a to supply the refrigerant transmitted from the evaporator to thecompressor 1 during a suction stroke of thepistons 50 but discharge the refrigerant compressed in thecompressor 1 toward the condenser during a compression stroke of thepistons 50. - A refrigerant circulation process of the
compressor 1 having the above structure will be described as follows. - The refrigerant supplied from the evaporator is inhaled to a suction part of the
muffler 70, supplied to theswash plate chamber 24 formed between thefront cylinder block 20 and therear cylinder 20 a through therefrigerant suction hole 71, and then, moves to thesuction chambers 11 of the front andrear housings rear cylinder blocks - After that, the
suction lead valve 63 is opened during the suction stroke of thepistons 50, and in this instance, the refrigerant contained in thesuction chamber 11 is inhaled into thecylinder bores 21. - The refrigerant contained in the
cylinder bores 21 is compressed during the compression stroke of thepistons 50, and in this instance, when the discharge lead valve 6 is opened, the refrigerant flows to thefirst discharge chambers 12 a of the front andrear housings second discharge chambers 12 b, and finally is discharged to a discharge part of themuffler 70 through therefrigerant discharge hole 72 of themuffler 72. After that, the refrigerant discharged to themuffler 70 flows to the condenser. - Meanwhile, the refrigerant compressed in the
cylinder bores 21 of thefront cylinder block 20 is discharged to thefirst discharge chamber 12 a of thefront housing 10, moves to thesecond discharge chamber 12 b, and then, moves to thesecond discharge chamber 12 b of therear housing 10 a along thecommunication passageway 23 formed in the front andrear cylinder blocks second discharge chamber 12 b is mixed with the refrigerant contained in thesecond discharge chamber 12 b, and then, discharged to the discharge part of themuffler 70 through therefrigerant discharge hole 72. - Meanwhile, one of the plural bolt fastening
holes partition wall 16 b where thesecond discharge chamber 12 b is partitioned from thesuction chamber 11. - However, during the compression stroke of the
pistons 50, the high-temperature and high-pressure refrigerant discharged from thecylinder bores 21 to thefirst discharge chamber 12 a is discharged to themuffler 70 after passing through thesecond discharge chamber 12 b. In the above process, the high temperature of the refrigerant passing through thesecond discharge chamber 12 b is transferred to thebolt fastening hole 16 a through thepartition wall 16 b, which is in contact with thesecond discharge chamber 12 b. - That is, since the
bolt fastening hole 16 a is thermally expanded due to an influence of temperature of the discharged refrigerant, thebolt 80 coupled with thebolt fastening hole 16 a gets loose and the refrigerant existing in an area of thebolt fastening hole 16 a is leaked. - Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide a compressor, which has a bolt-cooling part formed between a suction chamber and a bolt fastening hole formed at a position, where the suction chamber and a discharge chamber are partitioned from each other, for allowing for a flow of refrigerant toward the bolt fastening hole to reduce an influence of temperature of discharged refrigerant, thereby preventing loosening of a bolt due to a thermal expansion, preventing leakage of the refrigerant, and improving durability.
- To accomplish the above object, according to the present invention, there is provided a compressor comprising: front and rear housings, each housing having a plurality of bolt fastening holes formed in a circumferential direction therein, a suction chamber and a discharge chamber partitioned from each other by partition walls formed therebetween, and a bolt-cooling part formed between the suction chamber and the bolt fastening hole formed at the partition wall where the suction chamber and the discharge chamber are partitioned from each other to allow for a flow of refrigerant toward the bolt fastening hole; front and rear cylinder blocks mounted between the front housing and the rear housing; and a plurality of pistons mounted inside cylinder bores of the front and rear cylinder blocks for performing a reciprocating motion in cooperation with a rotating motion of a swash plate rotating in a swash plate chamber.
- The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings, in which:
-
FIG. 1 is a sectional view of a compressor according to a prior art; -
FIG. 2 is a sectional view taken along the line of A-A ofFIG. 1 ; -
FIG. 3 is a sectional view of a compressor according to the present invention; and -
FIG. 4 is a sectional view taken along the line of B-B ofFIG. 3 . - Reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings.
- In the present invention, description of the same parts and operations as the prior art will be omitted.
-
FIG. 3 is a sectional view of a compressor according to the present invention, andFIG. 4 is a sectional view taken along the line of B-B ofFIG. 3 . - First, the
compressor 1 according to the present invention includes: front andrear housings discharge chambers 12 andsuction chambers 11 formed therein, thedischarge chamber 12 being partitioned from thesuction chamber 11 by apartition wall 13 formed therebetween; front andrear cylinder blocks front housing 10 and therear housing 10 a and having a plurality ofcylinder bores 21 formed in both directions of aswash plate chamber 24 formed between thefront cylinder block 20 and therear cylinder block 20 a; adriving shaft 30 rotatably supported on the front andrear cylinder blocks swash plate 40 rotating together with thedriving shaft 30; and a plurality ofpistons 50 combined to the outer periphery of theswash plate 40 by interposingshoes 45 between theswash plate 40 and thepistons 50 and performing a reciprocating motion inside thecylinder bores 21. - Here, each of the
discharge chambers 12 of the front andrear housings first discharge chamber 12 a formed inside apartition wall 13; and asecond discharge chamber 12 b formed outside thepartition wall 13, partitioned from thesuction chamber 11, and fluidically communicated with thefirst discharge chamber 12 a through adischarge hole 12 c. That is, thesecond discharge chamber 12 b is partitioned from thesuction chamber 11 bypartition walls second discharge chamber 12 b. - Accordingly, refrigerant of the
first discharge chamber 12 a is reduced while passing through thedischarge hole 12 c of a small diameter but expanded while moving to thesecond discharge chamber 12 b, and so, a pulsating pressure drops during the process that the refrigerant is reduced and expanded, whereby vibration and noise can be reduced. - Meanwhile, a plurality of bolt fastening
holes suction chambers 11 of the front andrear housings rear housings bolts 80 into thebolt fastening holes valve units 60 are assembled between the front andrear housings - Moreover, the front and
rear cylinder blocks swash plate chamber 24 disposed between thefront cylinder block 20 and therear cylinder block 20 a flows to eachsuction chamber 11. Thesecond discharge chambers 12 b of the front andrear housings communication passageway 23 perforating through the front andrear cylinder blocks - Furthermore, the
valve units 60 are respectively assembled between thefront housing 10 and thefront cylinder block 20 and between therear housing 10 a and therear cylinder block 20 a. Eachvalve unit 60 includes asuction lead valve 63, avalve plate 61 having a refrigerant suction hole and a refrigerant discharge hole, and adischarge lead valve 62, which are formed in order from a direction of the front andrear cylinder blocks - Here, the
valve units 60 are combined and fixed to the front andrear housings rear cylinder blocks valve units 60 are inserted into fixingholes 15 formed on faces of the front andrear housings rear cylinder blocks - In addition, the front and
rear cylinder blocks shaft 30, andneedle roller bearings 26 are respectively mounted in the support holes 25 to rotatably support the drivingshaft 30. - Meanwhile, a
muffler 70 is mounted on the upper portion of the outer peripheral surface of therear housing 10 a to supply the refrigerant transferred from an evaporator to thecompressor 1 through arefrigerant suction hole 71 during a suction stroke of thepistons 50 and to discharge the refrigerant compressed in thecompressor 1 toward a condenser through arefrigerant discharge hole 72 during a compression stroke of thepistons 50. - Such a
compressor 1 is operated by selectively receiving driving power of an engine by a restriction action of an electronic clutch (not shown). - In the
compressor 1, one of the plural bolt fastening holes 16 and 16 a formed on the circumference of thesuction chamber 11 is formed at apartition wall 16 b where thesecond discharge chamber 12 b is partitioned from thesuction chamber 11. - In the present invention, a bolt-cooling
part 100 is formed between thesuction chamber 11 and thebolt fastening hole 16 a, which is formed at thepartition wall 16 b where thesecond discharge chamber 12 b is partitioned from thesuction chamber 11, to allow for a flow of the refrigerant toward thebolt fastening hole 16 a. - That is, the bolt-cooling
part 100 allows that some of the inhaled refrigerant flows toward thebolt fastening hole 16 a, so that thebolt fastening hole 16 a is cooled by the inhaled refrigerant to thereby prevent an influence of temperature of the discharged refrigerant and loosening of thebolt 80 by a thermal expansion. - The bolt-cooling
part 100 is constructed by tieredly forming acommunication passageway 101 on thepartition wall 16 b on which thebolt fastening hole 16 a is formed to fluidically communicate thesuction chamber 11 and thebolt fastening hole 16 a with each other, and so, thebolt fastening hole 16 a can be communicated with thesuction chamber 11 and theswash plate chamber 24. So, the inhaled refrigerant introduced into theswash plate chamber 24 flows toward thebolt fastening hole 16 a, and the inhaled refrigerant flowing to thebolt fastening hole 16 a moves to thesuction chamber 11 through thecommunication passageway 101. - Therefore, besides the channel where the refrigerant inhaled into the
swash plate chamber 24 flows to thesuction chamber 11 through the suction passageways (not shown) of the front andrear cylinder blocks compressor 1 according to the present invention has additional refrigerant flow channel (C) where the refrigerant flows to thesuction chamber 11 through thebolt fastening hole 16 a. As described above, during the process that the inhaled refrigerant of theswash plate chamber 24 flows to thesuction chamber 11 through thebolt fastening hole 16 a, oil mixed with the refrigerant is also supplied to thebolt fastening hole 16 a to cool thebolt fastening hole 16 a, whereby the thermal expansion by the discharged refrigerant can be prevented. - That is, the front and
rear cylinder blocks valve units 60 respectively have throughholes 22 to which thebolts 80 are inserted and fastened to couple and fix the front andrear housings bolts 80. So, the refrigerant inhaled to theswash plate chamber 24 can flow to thebolt fastening hole 16 a through the throughholes 22, and the inhaled refrigerant flowing to thebolt fastening hole 16 a moves to thesuction hole 11 through thecommunication passageway 101. - In addition, since the refrigerant contained in the
suction chamber 11 is always in contact with thebolt fastening hole 16 a by thecommunication passageway 101, a cooling effect of thebolt fastening hole 16 a can be improved more. - Meanwhile, the
communication passageway 101 serves to flow the inhaled refrigerant of theswash plate chamber 24 to thesuction chamber 11 through thebolt fastening hole 16 and to circulate the refrigerant of thesuction chamber 11 toward thebolt fastening hole 16 a. That is, since thecommunication passageway 101 is formed in an “U” shape fluidically communicating with thebolt fastening hole 16 a, the refrigerant of thesuction chamber 11 and oil mixed with the refrigerant can be circulated while passing through thebolt fastening hole 16 a through thecommunication passageway 101, whereby the cooling effect is maximized. - Additionally, besides the refrigerant flow channel (C) described above, some of the refrigerant contained in the
suction chamber 11 can flow toward thebolt fastening hole 16 a and move to theswash plate chamber 24 through thecommunication passageway 101 by the rotating motion of theswash plate 40 in theswash plate chamber 24. Of course, also during the above process, a good cooling effect can be obtained while the refrigerant passes through thebolt fastening hole 16 a. - As described above, according to the
compressor 1 of the present invention, the bolt-coolingpart 100 is formed between thesuction chamber 11 and thebolt fastening hole 16 a, which is located at thepartition wall 16 b where thedischarge chamber 12 is partitioned from thesuction chamber 11, out of the plural bolt fastening holes 16 and 16 a formed in the circumferential direction of thesuction chambers 11 of the front andrear housings bolt fastening hole 16 a to cool thebolt fastening hole 16 a. - So, during the compression stroke of the
pistons 50, the high-pressure and high-temperature refrigerant discharged from the cylinder bores 21 moves to thefirst discharge chambers 12 a of the front andrear housings second discharge chambers 12 b through thedischarge hole 12 c, and then, moves to the condenser through therefrigerant discharge hole 72 of themuffler 70. - Here, the discharged refrigerant passing through the
second discharge chamber 12 b is the high-pressure and high-temperature refrigerant, and the high temperature of the refrigerant is transferred to components adjacent to the refrigerant. In this instance, even though the high temperature of the discharged refrigerant is transferred toward thebolt fastening hole 16 a which is in contact with thesecond discharge chamber 12 b, thebolt fastening hole 16 a is cooled by the bolt-coolingpart 100 to thereby prevent the thermal expansion and loosening of thebolt 80. - The present invention is described in connection with an example that the structure having the bolt-cooling
part 100 to allow the flow of the inhaled refrigerant toward thebolt fastening hole 16 a, which is in contact with thesecond discharge chamber 12 b, is applied to the fixed capacity swashplate type compressor 1, but is not restricted to the above, and can be applied to compressors of various kinds, such as a variable capacity swash plate type compressor, a motor driven compressor and others, in the same method and structure as the above to obtain the same effects. - As described above, according to the present invention, the compressor can prevent loosening of the bolt due to the thermal expansion, prevent a leakage of the refrigerant, and improve durability, since the bolt-cooling part is formed between the suction chamber and the bolt fastening hole formed at a position, where the suction chamber and the discharge chamber are partitioned from each other, for allowing for a flow of refrigerant toward the bolt fastening hole to reduce an influence of temperature of discharged refrigerant.
- While the present invention has been described with reference to the particular illustrative embodiment, it is not to be restricted by the embodiment but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiment without departing from the scope and spirit of the present invention.
Claims (2)
1. A compressor comprising:
front and rear housings, each housing having a plurality of bolt fastening holes formed in a circumferential direction therein, a suction chamber and a discharge chamber partitioned from each other by partition walls formed therebetween, and a bolt-cooling part formed between the suction chamber and the bolt fastening hole formed at the partition wall where the suction chamber and the discharge chamber are partitioned from each other to allow for a flow of refrigerant toward the bolt fastening hole;
front and rear cylinder blocks mounted between the front housing and the rear housing; and
a plurality of pistons mounted inside cylinder bores of the front and rear cylinder blocks for performing a reciprocating motion in cooperation with a rotating motion of a swash plate rotating in a swash plate chamber.
2. The compressor according to claim 1 , wherein the bolt-cooling part is a communication passageway formed on the partition wall on which the bolt fastening hole is formed for fluidically communicating the suction chamber and the bolt fastening hole with each other.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2006-0040019 | 2006-05-03 | ||
KR1020060040019A KR101104283B1 (en) | 2006-05-03 | 2006-05-03 | Compressor |
Publications (1)
Publication Number | Publication Date |
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US20070256553A1 true US20070256553A1 (en) | 2007-11-08 |
Family
ID=38660036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/789,945 Abandoned US20070256553A1 (en) | 2006-05-03 | 2007-04-26 | Compressor |
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US (1) | US20070256553A1 (en) |
KR (1) | KR101104283B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120090461A1 (en) * | 2010-10-14 | 2012-04-19 | Panasonic Corporation | Compressor |
US20160208787A1 (en) * | 2015-01-21 | 2016-07-21 | Kabushiki Kaisha Toyota Jidoshokki | Double- headed piston type swash plate compressor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101257685B1 (en) | 2007-10-24 | 2013-04-24 | 엘지디스플레이 주식회사 | Electrophoretic Display Device and method for fabricating the same |
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US20160208787A1 (en) * | 2015-01-21 | 2016-07-21 | Kabushiki Kaisha Toyota Jidoshokki | Double- headed piston type swash plate compressor |
Also Published As
Publication number | Publication date |
---|---|
KR101104283B1 (en) | 2012-01-11 |
KR20070107466A (en) | 2007-11-07 |
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Legal Events
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AS | Assignment |
Owner name: HALLA CLIMATE CONTROL CORPORATION, KOREA, REPUBLIC Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIM, KWEONSOO;HWANG, SEUNGYONG;KIM, MINGYU;AND OTHERS;REEL/FRAME:021036/0495 Effective date: 20070404 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |