US20080202613A1 - Hermetic Compressor - Google Patents
Hermetic Compressor Download PDFInfo
- Publication number
- US20080202613A1 US20080202613A1 US10/547,471 US54747105A US2008202613A1 US 20080202613 A1 US20080202613 A1 US 20080202613A1 US 54747105 A US54747105 A US 54747105A US 2008202613 A1 US2008202613 A1 US 2008202613A1
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- US
- United States
- Prior art keywords
- reed
- discharge
- spring
- stopper
- pedestal
- 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
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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
- 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
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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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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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
- F04B39/0005—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 adaptations of 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
- 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
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1066—Valve plates
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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
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
-
- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/18—Leaf springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- 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
- Y10S251/00—Valves and valve actuation
-
- 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
- Y10S251/00—Valves and valve actuation
- Y10S251/902—Springs employed as valves
-
- 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
- Y10S417/902—Hermetically sealed motor pump unit
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7879—Resilient material valve
- Y10T137/7888—With valve member flexing about securement
- Y10T137/7891—Flap or reed
Definitions
- the present invention relates to a hermetic compressor used for a fridge-freezer and the like.
- Japanese Patent Laid-Open Application No. 2002-195160 discloses an example for a conventional hermetic compressor (hereinafter referred to as “compressor”). That is, a compressor equipped with a discharge valve device for reducing noise during operation and a loss when opening/closing the discharge reed, to improve energy efficiency.
- compressor hermetic compressor
- FIG. 7 is a sectional view of the conventional compressor
- FIG. 8 a plan view of the conventional compressor
- FIG. 9 a side sectional view of the discharge valve device of the conventional compressor
- FIG. 10 an exploded view of the discharge valve device of the conventional compressor.
- Hermetic container(hereinafter referred to as “container”) 1 is equipped with discharge pipe 2 and suction pipe 3 , both connected to a cooling system (not illustrated); and houses electromotive element 7 that stores oil 4 in its base part and also is composed of stator 5 and rotor 6 , and compression mechanism 8 rotarily driven by electromotive element 7 .
- the inside of container 1 is filled with refrigerant 9 .
- Cylinder 10 is equipped with substantially cylindrical compression chamber 11 and bearing section 12 .
- Valve plate 13 is equipped with discharge valve device 14 on the side opposite to the side contacting cylinder 10 , out of the two sides of valve plate 13 , to block compression chamber 11 .
- Head 15 covers valve plate 13 .
- Suction muffler 16 opens its one end to the inside of container 1 , and the other end of muffler 16 communicates with the inside of compression chamber 11 .
- Crankshaft 17 has main shaft 18 and eccentric section 19 , and is pivotally supported by bearing section 12 of the cylinder, with rotor 6 press-fitted and fixed.
- Piston 20 is inserted into compression chamber 11 reciprocably slidably and connected to eccentric section 19 with connecting rod 21 .
- Valve plate 13 has recess 22 on the side opposite to cylinder 10 .
- Recess 22 is equipped with discharge hole 23 communicating with cylinder 10 , valve sheet 24 formed so as to surround discharge hole 23 , and pedestal 25 formed on the substantially same plane as valve sheet 24 .
- Discharge reed 26 , spring reed 27 , and stopper 28 are fixed to pedestal 25 with rivet 29 in sequence.
- Discharge reed 26 made of a lingulate a leaf-spring member, is equipped with discharge reed holding part 30 fixed to pedestal 25 , and opening/closing part 31 for opening/closing valve sheet 24 .
- Spring reed 27 made of a lingulate a leaf-spring member, is equipped with spring reed holding part 32 fixed to pedestal 25 , and movable part 33 , and has bending part 34 in the proximity of the basal portion of opening/closing part 31 of discharge reed 26 .
- Stopper 28 is equipped with stopper holding part 35 fixed to pedestal 25 and regulation part 36 for regulating the action of discharge reed 26 .
- the side of regulation part 36 of stopper 28 is shaped substantially parallel to the plane including valve sheet 24 and pedestal 25 .
- Movable part 33 of spring reed 27 is adjusted by the bending angle of bending part 34 so that given clearance is formed between movable part 33 , and both opening/closing part 31 of discharge reed 26 and regulation part 36 of stopper 28 .
- refrigerant 9 in container 1 is inhaled from suction muffler 16 to compression chamber 11 , and also low-pressure refrigerant 9 flows from a cooling system (not illustrated) through suction pipe 3 into container 1 .
- Refrigerant 9 inhaled into compression chamber 11 is compressed and discharged through discharge valve device 14 of valve plate 13 into head 15 .
- a high-pressure gas discharged into head 15 is discharged through discharge pipe 2 to the cooling system (not illustrated).
- oil 4 When starting a compressor in which this phenomenon of low freezing capacity tends to occur, oil 4 returns along with refrigerant 9 from the refrigeration cycle (not illustrated). A large amount of oil 4 results in intervening in discharge reed 26 and spring reed 27 , because oil 4 , as well as refrigerant 9 , is compressed and discharged.
- a compressor generally inhales at a high pressure when starting up, and compresses and discharges refrigerant 9 with relatively high density, until the inside of container 1 is decompressed. Consequently, a heavy load is imposed on opening/closing part 31 of discharge reed. Meanwhile, the displacement in opening/closing part 31 of discharge reed 26 is regulated by regulation part 36 of stopper 28 . As a result, opening/closing part 31 of discharge reed 26 is strongly pressed due to high-density refrigerant 9 against movable part 33 of spring reed 27 allocated between opening/closing part 31 and regulation part 36 of stopper 28 .
- discharge reed 26 and spring reed 27 are integrated and perform opening/closing operations as if they are one thick discharge reed.
- movable part 33 of spring reed 27 is bent at bending part 34 in a direction in which discharge reed 26 opens, and as a result, the spring force acts in the direction opposite to that in which discharge reed 26 closes. In this way, discharge reed 26 is pulled in the direction in which it opens, thus delaying timing for closing.
- the present invention provides a hermetic compressor in which the side of the spring reed is shaped in a substantially crank-like form, and clearance is formed between the spring reed, and both the discharge reed and stopper, at the position corresponding to the discharge reed opening/closing part.
- This makeup prevents adsorption of the discharge reed and spring reed due to oil intervening between them and a delay in closing the discharge reed, thus providing a highly efficient hermetic compressor.
- FIG. 1 is a sectional view of a compressor according to the embodiment of the present invention.
- FIG. 2 is a plan view of a compressor according to the embodiment of the present invention.
- FIG. 3 is a side sectional view of a discharge valve device when closed, according to the embodiment of the present invention.
- FIG. 4 is an exploded view of a discharge valve device according to the embodiment of the present invention.
- FIG. 5 is a side sectional view of a discharge valve device when open, according to the embodiment of the present invention.
- FIG. 6 is a diagram for the spring characteristic of a discharge valve device according to the embodiment of the present invention.
- FIG. 7 is a sectional view of a conventional compressor.
- FIG. 8 is a plan view of a conventional compressor.
- FIG. 9 is a side sectional view of a discharge valve device of a conventional compressor.
- FIG. 10 is an exploded view of a discharge valve device of a conventional compressor.
- the present invention relates to a compressor including a compression mechanism; an electromotive element for rotarily driving the compression mechanism; and a container for housing the compression mechanism and the electromotive element, and for storing oil.
- the compression mechanism has a piston, a cylinder in which the piston reciprocably moves, and a valve plate that seals an open end of the cylinder and also is equipped with a discharge valve device on the side opposite to the cylinder.
- the discharge valve device is formed on the valve plate formed with a discharge hole communicating with the inside of the cylinder, a valve sheet provided outside the discharge hole, and a pedestal formed on the substantially same plane as the valve sheet.
- a discharge reed made of a leaf-spring member, is equipped with an opening/closing part for opening/closing the discharge hole, and a discharge reed holding part fixed to the pedestal; a spring reed, made of a leaf-spring member, equipped with a movable part, and a spring reed holding part fixed to the pedestal; and a stopper equipped with a regulation part, and a stopper holding part fixed to the pedestal, are fixed on the pedestal in this sequence.
- the side of the spring reed is shaped in a substantially crank-like form, and clearance is formed between the spring reed, and both the discharge reed and stopper, at the position corresponding to the discharge reed opening/closing part.
- oil intervenes between the discharge reed and spring reed when starting up, for example, and thus a space is formed between the movable part of the spring reed and the opening/closing part of the discharge reed, even if an excessive load is imposed on the discharge reed.
- This makeup prevents a delay in closing the discharge reed, because both the movable part and the opening/closing part are not adsorbed each other, thus providing a compressor that suppresses a decrease in its freezing capacity and has high energy efficiency.
- the bending part of discharge reed is bent at the side close to opening/closing part, to the side of the valve sheet. In this way, a force to press the opening/closing part of the discharge reed against the valve sheet is stably available, and thus sealability between the opening/closing part of the discharge reed and valve sheet is improved, further improving energy efficiency.
- the discharge reed bending part is to be positioned at an undercut part formed between the valve sheet and pedestal.
- the tilt amount of the discharge reed can be stabilized, and thus a force to press the opening/closing part of the discharge reed against the valve sheet is stably available. Consequently, sealability between the opening/closing part of the discharge reed and valve sheet is improved, further improving energy efficiency.
- a touch part is formed on the regulation part of the stopper, that is bent to the side of the spring reed.
- the method of supporting the movable of the spring reed changes from “cantilever” to “center impeller” by the time when displacement of the discharge reed is regulated by the regulation part of the stopper, and thus the spring force by the movable part of the spring reed is available more effectively in the meantime.
- This allows setting stepwise a required spring characteristic. Consequently, an optimum spring characteristic is available in the regions of both low circulation amount and high circulation amount, further improving energy efficiency.
- FIGS. 1 through 6 the drawings are schematic and do not correctly illustrate each positional relationship dimensionally.
- Container 101 is equipped with discharge pipe 102 and suction pipe 103 , both connected to a cooling system (not illustrated); stores oil 104 in its base part; houses electromotive element 107 including stator 105 rotor 106 , and compression mechanism 108 rotarily driven by this electromotive element 107 .
- the inside of container 101 is filled with refrigerant 109 .
- Refrigerant 109 is desirably irrelevant to CFCs corresponding to environmental issues of recent years, and a refrigerant such as R134a and R600a is used.
- Cylinder 110 is equipped with substantially cylindrical compression chamber 111 and bearing section 112 .
- Valve plate 113 is equipped with discharge valve device 114 on the side opposite to the side contacting cylinder 110 , out of the two sides of valve plate 113 , to block compression chamber 111 .
- Head 115 covers valve plate 113 .
- Suction muffler 116 opens its one end to the inside of container 101 , and the other end of the muffler communicates with the inside of compression chamber 111 .
- Crankshaft 117 has main shaft 118 and eccentric section 119 , is pivotally supported by bearing section 112 of cylinder 110 , and is press-fitted into stator 105 and fixed.
- Piston 120 is inserted into compression chamber 111 reciprocably slidably and connected to eccentric section 119 with connecting rod 21 .
- Valve plate 113 has recess 122 that is provided with discharge hole 123 communicating with cylinder 110 , valve sheet 124 formed so as to surround discharge hole 123 , and pedestal 125 formed on the substantially same plane as valve sheet 124 .
- Discharge reed 126 is fixed to pedestal 125 with rivet 129 in sequence.
- Discharge reed 126 made of a lingulate a leaf-spring member, is equipped with discharge reed holding part 130 fixed to pedestal 125 , and opening/closing part 131 for opening/closing valve sheet 124 .
- Spring reed 127 made of a lingulate a leaf-spring member, is equipped with spring reed holding part 132 fixed to pedestal 125 , and movable part 133 , and is shaped in a substantially crank-like form by means of first bending part 134 and second bending part 135 provided on movable part 133 .
- first bending part 134 is positioned in the proximity of the basal portion of movable part 133 of spring reed 127
- second bending part 135 is positioned at movable part 133 of spring reed 127 .
- Stopper 128 is equipped with stopper holding part 136 fixed to pedestal 125 , and regulation part 137 for regulating the action of discharge reed 126 .
- the side of regulation part 137 is shaped substantially parallel to the plane including valve sheet 124 and pedestal 125 .
- the bending angles of respective bending parts are set so that movable part 133 of spring reed 127 has clearance between the movable part, and both opening/closing part 131 of discharge reed 126 and regulation part 137 of stopper 128 .
- Discharge reed bending part 138 of discharge reed 126 is bent at the side close to opening/closing part 131 to the side of valve sheet 124 .
- Undercut part 139 that is deeper than pedestal 125 is formed between valve sheet 124 and pedestal 125 , and discharge reed bending part 138 is positioned in undercut part 139 .
- Stopper 128 forms touch part 140 bent to the side of spring reed 127 , at regulation part 137 of stopper 128 , and the side of touch part 140 is shaped substantially parallel to the plane including valve sheet 124 and pedestal 125 .
- refrigerant 109 in container 101 is inhaled from suction muffler 116 into compression chamber 111 , and also low-pressure refrigerant 109 flows from a cooling system (not illustrated) through suction pipe 103 into container 101 .
- Refrigerant 109 inhaled into compression chamber 111 is compressed and discharged through discharge valve device 114 of valve plate 113 into head 116 . Further, a high-pressure gas discharged into head 115 is discharged through discharge pipe 102 to the cooling system (not illustrated).
- oil 104 when starting up the compressor, oil 104 returns along with refrigerant 109 from the refrigeration cycle (not illustrated). A large amount of oil 4 results in intervening between discharge reed 126 and spring reed 127 , because oil 104 , as well as refrigerant 109 , is compressed and discharged.
- a compressor generally inhales at a high pressure when starting up, and compresses and discharges refrigerant 109 with relatively high density, until the inside of container 1 is decompressed. Consequently, a heavy load is imposed on opening/closing part 131 of discharge reed 126 .
- opening/closing part 131 of discharge reed 126 is regulated by regulation part 137 of stopper 128 . Consequently, opening/closing part 131 of discharge reed 126 is strongly pressed due to high-density refrigerant 109 against movable part 133 of spring reed 127 allocated between opening/closing part 131 and regulation part 137 of stopper 128 .
- the first and second bending parts are formed in movable part 133 of spring reed 127 , and thus space 141 is formed between opening/closing part 131 of discharge reed 126 and movable part 133 of spring reed 127 , as shown in FIG. 5 . Accordingly, movable part 133 of spring reed 127 is immediately detached from opening/closing part 131 of discharge reed 126 . In other words, the adsorption does not continue, and spring reed 127 does not integrally operate with discharge reed 126 , thus preventing a delay in closing.
- discharge reed bending part 138 of discharge reed 126 is bent at the side close to opening/closing part 131 , to the side of valve sheet 124 , and thus a force occurs to press opening/closing part 131 of discharge reed 126 against valve sheet 124 .
- This force prevents opening/closing part 131 of discharge reed 126 from floating over valve sheet 124 , to keep further favorable sealability, thus providing a compressor with high energy efficiency.
- undercut part 139 deeper than pedestal 125 is formed between valve sheet 124 and pedestal 125 , and discharge reed bending part 138 is positioned at undercut part 139 , thus preventing undercut part 139 from being pressed by a spring force of pedestal 125 and spring reed 127 . Consequently, the tilt amount of opening/closing part 131 of discharge reed 126 can be stabilized, thus providing a compressor with stable freezing capacity.
- regulation part 137 of stopper 128 is formed with touch part 140 that is bent to the side of spring reed 127 , and thus discharge reed 126 can further displaces while spring reed 127 touches touch part 140 .
- the spring characteristic of discharge reed 126 has two inflection points as shown in FIG. 6 , and thus three steps of spring forces are available.
- the horizontal axis shows displacement; and the vertical axis, spring force.
- “A” and “B” show the first and second inflection points respectively.
- the first inflection point is a point at which opening/closing part 131 of discharge reed 126 touches movable part 133 of spring reed 127 , and from then on to the second inflection point, a resultant spring force is available of opening/closing part 131 of discharge reed 126 and movable part 133 of spring reed 127 .
- the second inflection point is a point at which movable part 133 of spring reed 127 touches touch part 140 of stopper 128 , and from there on, the spring force further increases as a result that the support method of the spring reed changes from “cantilever” to “center impeller.”
- the present invention provides a compressor with high energy efficiency owing to a short delay in closing of discharge reed 126 even in the region of high circulation amount where discharge reed 126 largely opens.
- the present invention provides compressor with high energy efficiency owing to a very short delay in closing of the discharge reed even for a relatively large circulation amount. Further, the compressor can use various types of refrigerants, and thus it is also applicable to freezing and air-conditioning devices using a CO 2 refrigerant, for example.
Abstract
Description
- The present invention relates to a hermetic compressor used for a fridge-freezer and the like.
- Japanese Patent Laid-Open Application No. 2002-195160 discloses an example for a conventional hermetic compressor (hereinafter referred to as “compressor”). That is, a compressor equipped with a discharge valve device for reducing noise during operation and a loss when opening/closing the discharge reed, to improve energy efficiency.
- Hereinafter, a description is made for this conventional compressor, referring to
FIGS. 7 through 10 .FIG. 7 is a sectional view of the conventional compressor;FIG. 8 , a plan view of the conventional compressor;FIG. 9 , a side sectional view of the discharge valve device of the conventional compressor; andFIG. 10 , an exploded view of the discharge valve device of the conventional compressor. - Hermetic container(hereinafter referred to as “container”) 1 is equipped with
discharge pipe 2 andsuction pipe 3, both connected to a cooling system (not illustrated); and houseselectromotive element 7 that storesoil 4 in its base part and also is composed ofstator 5 androtor 6, andcompression mechanism 8 rotarily driven byelectromotive element 7. The inside ofcontainer 1 is filled withrefrigerant 9. - Next, a description is made for the principal makeup of
compression mechanism 8. -
Cylinder 10 is equipped with substantiallycylindrical compression chamber 11 andbearing section 12. Valveplate 13 is equipped withdischarge valve device 14 on the side opposite to theside contacting cylinder 10, out of the two sides ofvalve plate 13, toblock compression chamber 11.Head 15 coversvalve plate 13.Suction muffler 16 opens its one end to the inside ofcontainer 1, and the other end ofmuffler 16 communicates with the inside ofcompression chamber 11.Crankshaft 17 hasmain shaft 18 andeccentric section 19, and is pivotally supported by bearingsection 12 of the cylinder, withrotor 6 press-fitted and fixed. Piston 20 is inserted intocompression chamber 11 reciprocably slidably and connected toeccentric section 19 with connectingrod 21. - Next, a description is made for
discharge valve device 14 provided incompression mechanism 8. - Valve
plate 13 has recess 22 on the side opposite tocylinder 10.Recess 22 is equipped withdischarge hole 23 communicating withcylinder 10,valve sheet 24 formed so as to surrounddischarge hole 23, andpedestal 25 formed on the substantially same plane asvalve sheet 24. Dischargereed 26,spring reed 27, andstopper 28 are fixed topedestal 25 withrivet 29 in sequence. -
Discharge reed 26, made of a lingulate a leaf-spring member, is equipped with dischargereed holding part 30 fixed topedestal 25, and opening/closingpart 31 for opening/closing valve sheet 24. -
Spring reed 27, made of a lingulate a leaf-spring member, is equipped with springreed holding part 32 fixed topedestal 25, andmovable part 33, and has bendingpart 34 in the proximity of the basal portion of opening/closingpart 31 ofdischarge reed 26. - Stopper 28 is equipped with
stopper holding part 35 fixed topedestal 25 and regulationpart 36 for regulating the action ofdischarge reed 26. The side ofregulation part 36 ofstopper 28 is shaped substantially parallel to the plane includingvalve sheet 24 andpedestal 25.Movable part 33 ofspring reed 27 is adjusted by the bending angle of bendingpart 34 so that given clearance is formed betweenmovable part 33, and both opening/closingpart 31 ofdischarge reed 26 andregulation part 36 ofstopper 28. - Hereinafter, a description is made for the action of the compressor composed as mentioned above.
- Supplying
electromotive element 7 with electricity causesrotor 6 to rotate andcrankshaft 17 to be rotarily driven. In this case, as a result that an eccentric rotational movement ofeccentric section 19 transmits topiston 20 through connectingrod 21,piston 20 reciprocably moves incompression chamber 11. - As
piston 20 reciprocably moves,refrigerant 9 incontainer 1 is inhaled fromsuction muffler 16 tocompression chamber 11, and also low-pressure refrigerant 9 flows from a cooling system (not illustrated) throughsuction pipe 3 intocontainer 1. Refrigerant 9 inhaled intocompression chamber 11 is compressed and discharged throughdischarge valve device 14 ofvalve plate 13 intohead 15. Further, a high-pressure gas discharged intohead 15 is discharged throughdischarge pipe 2 to the cooling system (not illustrated). - However, in the above-mentioned conventional makeup, the following phenomenon is occasionally observed. That is, a state of low freezing capacity remains for a relatively long time as compared to its original freezing capacity, immediately after the compressor starts up. This mechanism can be described as hereinafter by means of behavior analysis of
discharge reed 26 andspring reed 27. - When starting a compressor in which this phenomenon of low freezing capacity tends to occur,
oil 4 returns along withrefrigerant 9 from the refrigeration cycle (not illustrated). A large amount ofoil 4 results in intervening indischarge reed 26 andspring reed 27, becauseoil 4, as well asrefrigerant 9, is compressed and discharged. - Further, a compressor generally inhales at a high pressure when starting up, and compresses and discharges refrigerant 9 with relatively high density, until the inside of
container 1 is decompressed. Consequently, a heavy load is imposed on opening/closingpart 31 of discharge reed. Meanwhile, the displacement in opening/closingpart 31 ofdischarge reed 26 is regulated byregulation part 36 ofstopper 28. As a result, opening/closingpart 31 ofdischarge reed 26 is strongly pressed due to high-density refrigerant 9 againstmovable part 33 ofspring reed 27 allocated between opening/closing part 31 andregulation part 36 ofstopper 28. - Then, a large pressing load as mentioned above causes adsorption of opening/closing
part 31 ofdischarge reed 26 andmovable part 33 ofspring reed 27, due tooil 4. In this way,discharge reed 26 andspring reed 27 are integrated and perform opening/closing operations as if they are one thick discharge reed. - Here,
movable part 33 ofspring reed 27 is bent at bendingpart 34 in a direction in whichdischarge reed 26 opens, and as a result, the spring force acts in the direction opposite to that in whichdischarge reed 26 closes. In this way,discharge reed 26 is pulled in the direction in which it opens, thus delaying timing for closing. - Consequently, the time while
discharge reed 26 is open becomes long, afterpiston 20 passes the top dead center and proceeds to a suction stroke incompression chamber 11. In the meantime, a high-pressure refrigerant flows back incompression chamber 11, and thus the substantial volume displaced by the piston decreases, causing a phenomenon of low freezing capacity to occur. - While this phenomenon of low-freezing capacity is occurring, the compressor decreases its efficiently and increases its power consumption, and at the same time, causes a problem in which a freezing machine loaded with this compressor is deadened in its freezing capacity.
- The present invention provides a hermetic compressor in which the side of the spring reed is shaped in a substantially crank-like form, and clearance is formed between the spring reed, and both the discharge reed and stopper, at the position corresponding to the discharge reed opening/closing part.
- This makeup prevents adsorption of the discharge reed and spring reed due to oil intervening between them and a delay in closing the discharge reed, thus providing a highly efficient hermetic compressor.
-
FIG. 1 is a sectional view of a compressor according to the embodiment of the present invention. -
FIG. 2 is a plan view of a compressor according to the embodiment of the present invention. -
FIG. 3 is a side sectional view of a discharge valve device when closed, according to the embodiment of the present invention. -
FIG. 4 is an exploded view of a discharge valve device according to the embodiment of the present invention. -
FIG. 5 is a side sectional view of a discharge valve device when open, according to the embodiment of the present invention. -
FIG. 6 is a diagram for the spring characteristic of a discharge valve device according to the embodiment of the present invention. -
FIG. 7 is a sectional view of a conventional compressor. -
FIG. 8 is a plan view of a conventional compressor. -
FIG. 9 is a side sectional view of a discharge valve device of a conventional compressor. -
FIG. 10 is an exploded view of a discharge valve device of a conventional compressor. - The present invention relates to a compressor including a compression mechanism; an electromotive element for rotarily driving the compression mechanism; and a container for housing the compression mechanism and the electromotive element, and for storing oil. The compression mechanism has a piston, a cylinder in which the piston reciprocably moves, and a valve plate that seals an open end of the cylinder and also is equipped with a discharge valve device on the side opposite to the cylinder. The discharge valve device is formed on the valve plate formed with a discharge hole communicating with the inside of the cylinder, a valve sheet provided outside the discharge hole, and a pedestal formed on the substantially same plane as the valve sheet. In the discharge valve device, a discharge reed, made of a leaf-spring member, is equipped with an opening/closing part for opening/closing the discharge hole, and a discharge reed holding part fixed to the pedestal; a spring reed, made of a leaf-spring member, equipped with a movable part, and a spring reed holding part fixed to the pedestal; and a stopper equipped with a regulation part, and a stopper holding part fixed to the pedestal, are fixed on the pedestal in this sequence. Further, the side of the spring reed is shaped in a substantially crank-like form, and clearance is formed between the spring reed, and both the discharge reed and stopper, at the position corresponding to the discharge reed opening/closing part. In this way, oil intervenes between the discharge reed and spring reed when starting up, for example, and thus a space is formed between the movable part of the spring reed and the opening/closing part of the discharge reed, even if an excessive load is imposed on the discharge reed. This makeup prevents a delay in closing the discharge reed, because both the movable part and the opening/closing part are not adsorbed each other, thus providing a compressor that suppresses a decrease in its freezing capacity and has high energy efficiency.
- Further, in the compressor of the present invention, the bending part of discharge reed is bent at the side close to opening/closing part, to the side of the valve sheet. In this way, a force to press the opening/closing part of the discharge reed against the valve sheet is stably available, and thus sealability between the opening/closing part of the discharge reed and valve sheet is improved, further improving energy efficiency.
- Meanwhile, in the compressor of the present invention, the discharge reed bending part is to be positioned at an undercut part formed between the valve sheet and pedestal. In this way, the tilt amount of the discharge reed can be stabilized, and thus a force to press the opening/closing part of the discharge reed against the valve sheet is stably available. Consequently, sealability between the opening/closing part of the discharge reed and valve sheet is improved, further improving energy efficiency.
- In addition, in the compressor of the present invention, a touch part is formed on the regulation part of the stopper, that is bent to the side of the spring reed. In this way, the method of supporting the movable of the spring reed changes from “cantilever” to “center impeller” by the time when displacement of the discharge reed is regulated by the regulation part of the stopper, and thus the spring force by the movable part of the spring reed is available more effectively in the meantime. This allows setting stepwise a required spring characteristic. Consequently, an optimum spring characteristic is available in the regions of both low circulation amount and high circulation amount, further improving energy efficiency.
- Hereinafter, a detailed description is made for the embodiment of the compressor according to the present invention, referring to
FIGS. 1 through 6 . Here, the drawings are schematic and do not correctly illustrate each positional relationship dimensionally. -
Container 101 is equipped withdischarge pipe 102 andsuction pipe 103, both connected to a cooling system (not illustrated); storesoil 104 in its base part; houseselectromotive element 107 includingstator 105rotor 106, andcompression mechanism 108 rotarily driven by thiselectromotive element 107. The inside ofcontainer 101 is filled withrefrigerant 109. -
Refrigerant 109 is desirably irrelevant to CFCs corresponding to environmental issues of recent years, and a refrigerant such as R134a and R600a is used. - Next, a description is made for the principal makeup of
compression mechanism 108. -
Cylinder 110 is equipped with substantiallycylindrical compression chamber 111 andbearing section 112.Valve plate 113 is equipped withdischarge valve device 114 on the side opposite to theside contacting cylinder 110, out of the two sides ofvalve plate 113, to blockcompression chamber 111.Head 115 coversvalve plate 113.Suction muffler 116 opens its one end to the inside ofcontainer 101, and the other end of the muffler communicates with the inside ofcompression chamber 111.Crankshaft 117 hasmain shaft 118 andeccentric section 119, is pivotally supported by bearingsection 112 ofcylinder 110, and is press-fitted intostator 105 and fixed.Piston 120 is inserted intocompression chamber 111 reciprocably slidably and connected toeccentric section 119 with connectingrod 21. - Next, a description is made for
discharge valve device 114 provided incompression mechanism 108.Valve plate 113 hasrecess 122 that is provided withdischarge hole 123 communicating withcylinder 110,valve sheet 124 formed so as to surrounddischarge hole 123, andpedestal 125 formed on the substantially same plane asvalve sheet 124. -
Discharge reed 126,spring reed 127, andstopper 128 are fixed topedestal 125 withrivet 129 in sequence.Discharge reed 126, made of a lingulate a leaf-spring member, is equipped with dischargereed holding part 130 fixed topedestal 125, and opening/closing part 131 for opening/closing valve sheet 124. -
Spring reed 127, made of a lingulate a leaf-spring member, is equipped with springreed holding part 132 fixed topedestal 125, andmovable part 133, and is shaped in a substantially crank-like form by means offirst bending part 134 andsecond bending part 135 provided onmovable part 133. - Further, first bending
part 134 is positioned in the proximity of the basal portion ofmovable part 133 ofspring reed 127, and second bendingpart 135 is positioned atmovable part 133 ofspring reed 127. -
Stopper 128 is equipped withstopper holding part 136 fixed topedestal 125, andregulation part 137 for regulating the action ofdischarge reed 126. The side ofregulation part 137 is shaped substantially parallel to the plane includingvalve sheet 124 andpedestal 125. - The bending angles of respective bending parts are set so that
movable part 133 ofspring reed 127 has clearance between the movable part, and both opening/closing part 131 ofdischarge reed 126 andregulation part 137 ofstopper 128. - Discharge
reed bending part 138 ofdischarge reed 126 is bent at the side close to opening/closing part 131 to the side ofvalve sheet 124. - Undercut
part 139 that is deeper thanpedestal 125 is formed betweenvalve sheet 124 andpedestal 125, and dischargereed bending part 138 is positioned inundercut part 139. -
Stopper 128 forms touchpart 140 bent to the side ofspring reed 127, atregulation part 137 ofstopper 128, and the side oftouch part 140 is shaped substantially parallel to the plane includingvalve sheet 124 andpedestal 125. - A description is made for the operations and actions of the compressor composed as mentioned above.
- Supplying
electromotive element 107 with electricity causesrotor 106 to rotate andcrankshaft 117 to be rotarily driven. In this case, as a result that an eccentric rotational movement ofeccentric section 119 transmits topiston 120 through connectingrod 121,piston 120 reciprocably moves incompression chamber 111. - As
piston 120 reciprocably moves, refrigerant 109 incontainer 101 is inhaled fromsuction muffler 116 intocompression chamber 111, and also low-pressure refrigerant 109 flows from a cooling system (not illustrated) throughsuction pipe 103 intocontainer 101. -
Refrigerant 109 inhaled intocompression chamber 111 is compressed and discharged throughdischarge valve device 114 ofvalve plate 113 intohead 116. Further, a high-pressure gas discharged intohead 115 is discharged throughdischarge pipe 102 to the cooling system (not illustrated). - Here, when starting up the compressor,
oil 104 returns along with refrigerant 109 from the refrigeration cycle (not illustrated). A large amount ofoil 4 results in intervening betweendischarge reed 126 andspring reed 127, becauseoil 104, as well asrefrigerant 109, is compressed and discharged. - Further, a compressor generally inhales at a high pressure when starting up, and compresses and discharges refrigerant 109 with relatively high density, until the inside of
container 1 is decompressed. Consequently, a heavy load is imposed on opening/closing part 131 ofdischarge reed 126. - Meanwhile, the displacement in opening/
closing part 131 ofdischarge reed 126 is regulated byregulation part 137 ofstopper 128. Consequently, opening/closingpart 131 ofdischarge reed 126 is strongly pressed due to high-density refrigerant 109 againstmovable part 133 ofspring reed 127 allocated between opening/closing part 131 andregulation part 137 ofstopper 128. - This causes adsorption of opening/
closing part 131 ofdischarge reed 126 andmovable part 133 ofspring reed 127 due tooil 104. - However, the first and second bending parts are formed in
movable part 133 ofspring reed 127, and thus space 141 is formed between opening/closing part 131 ofdischarge reed 126 andmovable part 133 ofspring reed 127, as shown inFIG. 5 . Accordingly,movable part 133 ofspring reed 127 is immediately detached from opening/closing part 131 ofdischarge reed 126. In other words, the adsorption does not continue, andspring reed 127 does not integrally operate withdischarge reed 126, thus preventing a delay in closing. - Consequently, a phenomenon can be prevented of low-freezing capacity caused by flowing back of a high-pressure refrigerant into
compression chamber 111, thus providing a compressor with high energy efficiency. - Meanwhile, discharge
reed bending part 138 ofdischarge reed 126 is bent at the side close to opening/closing part 131, to the side ofvalve sheet 124, and thus a force occurs to press opening/closing part 131 ofdischarge reed 126 againstvalve sheet 124. - This force prevents opening/
closing part 131 ofdischarge reed 126 from floating overvalve sheet 124, to keep further favorable sealability, thus providing a compressor with high energy efficiency. - In addition, undercut
part 139 deeper thanpedestal 125 is formed betweenvalve sheet 124 andpedestal 125, and dischargereed bending part 138 is positioned atundercut part 139, thus preventingundercut part 139 from being pressed by a spring force ofpedestal 125 andspring reed 127. Consequently, the tilt amount of opening/closing part 131 ofdischarge reed 126 can be stabilized, thus providing a compressor with stable freezing capacity. - Further, according to this embodiment,
regulation part 137 ofstopper 128 is formed withtouch part 140 that is bent to the side ofspring reed 127, and thus dischargereed 126 can further displaces whilespring reed 127 touchestouch part 140. - That is to say, the spring characteristic of
discharge reed 126 has two inflection points as shown inFIG. 6 , and thus three steps of spring forces are available. - In
FIG. 6 , the horizontal axis shows displacement; and the vertical axis, spring force. “A” and “B” show the first and second inflection points respectively. Here, the first inflection point is a point at which opening/closing part 131 ofdischarge reed 126 touchesmovable part 133 ofspring reed 127, and from then on to the second inflection point, a resultant spring force is available of opening/closing part 131 ofdischarge reed 126 andmovable part 133 ofspring reed 127. - The second inflection point is a point at which
movable part 133 ofspring reed 127 touchestouch part 140 ofstopper 128, and from there on, the spring force further increases as a result that the support method of the spring reed changes from “cantilever” to “center impeller.” - As mentioned above, as a result that three steps of spring characteristics are achieved owing to having two inflection points, as
discharge reed 126 opens largely, a strong spring force occurs, causingdischarge reed 126 to close fast. - In this way, the present invention provides a compressor with high energy efficiency owing to a short delay in closing of
discharge reed 126 even in the region of high circulation amount wheredischarge reed 126 largely opens. - The present invention provides compressor with high energy efficiency owing to a very short delay in closing of the discharge reed even for a relatively large circulation amount. Further, the compressor can use various types of refrigerants, and thus it is also applicable to freezing and air-conditioning devices using a CO2 refrigerant, for example.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004259243A JP2006077579A (en) | 2004-09-07 | 2004-09-07 | Hermetic compressor |
PCT/JP2005/004856 WO2006027864A1 (en) | 2004-09-07 | 2005-03-11 | Hermetic compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080202613A1 true US20080202613A1 (en) | 2008-08-28 |
Family
ID=34961899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/547,471 Abandoned US20080202613A1 (en) | 2004-09-07 | 2005-03-11 | Hermetic Compressor |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080202613A1 (en) |
EP (1) | EP1802869A1 (en) |
JP (1) | JP2006077579A (en) |
KR (1) | KR100723104B1 (en) |
CN (1) | CN100419261C (en) |
WO (1) | WO2006027864A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150316044A1 (en) * | 2012-12-06 | 2015-11-05 | Carrier Corporation | Discharge Reed Valve for Reciprocating Refrigeration Compressor |
US20170356441A1 (en) * | 2014-11-25 | 2017-12-14 | Whirlpool S.A. | Reciprocating Compressor Valves Arrangement |
US11378195B2 (en) * | 2020-04-06 | 2022-07-05 | Mikuni Corporation | Reed valve |
US20220333589A1 (en) * | 2021-04-16 | 2022-10-20 | Wen-San Chou | Air compressor |
US20220341410A1 (en) * | 2021-04-22 | 2022-10-27 | Wen-San Chou | Air stop sheet of piston of cylinder |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100875016B1 (en) * | 2006-04-06 | 2008-12-19 | 파나소닉 주식회사 | Hermetic compressor |
JP2008531898A (en) * | 2006-04-19 | 2008-08-14 | 松下電器産業株式会社 | Hermetic compressor |
US20090291007A1 (en) * | 2006-04-27 | 2009-11-26 | Matsushita Electric Industrial Co., Ltd. | Hermetic compressor |
CN103835923B (en) * | 2013-12-11 | 2016-11-23 | 广州万宝集团压缩机有限公司 | A kind of reciprocating compressor valve block structure of exhaust valve plate fast opening and closing |
CN104728085A (en) * | 2015-03-19 | 2015-06-24 | 安徽美芝制冷设备有限公司 | Compressor and exhaust valve assembly thereof |
CN106337796A (en) * | 2016-11-30 | 2017-01-18 | 合肥安信瑞德精密制造有限公司 | Air-conditioning compressor exhaust valve plate stopper |
CN107725329B (en) * | 2017-11-08 | 2023-12-15 | 福建雪人股份有限公司 | Oil gas control device of semi-closed piston compressor |
JP6966387B2 (en) * | 2018-07-06 | 2021-11-17 | 日立グローバルライフソリューションズ株式会社 | Valves and equipment with valves |
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JPS608577A (en) * | 1983-06-29 | 1985-01-17 | Hitachi Ltd | Construction of delivery valve for compressor |
CN1083063C (en) * | 1995-04-20 | 2002-04-17 | Lg电子株式会社 | Valve apparatus of hermetic type compressor |
JPH09137779A (en) * | 1995-11-16 | 1997-05-27 | Sanyo Electric Co Ltd | Refrigerant compressor |
KR200221545Y1 (en) * | 2000-12-07 | 2001-04-16 | 엘지전자주식회사 | A retainer structure for hermetic compressor |
JP4670146B2 (en) * | 2000-12-25 | 2011-04-13 | パナソニック株式会社 | Hermetic electric compressor |
KR20190000980A (en) * | 2017-06-26 | 2019-01-04 | 이동원 | A personal Healthcare System |
-
2004
- 2004-09-07 JP JP2004259243A patent/JP2006077579A/en not_active Withdrawn
-
2005
- 2005-03-11 CN CNB2005800000602A patent/CN100419261C/en not_active Expired - Fee Related
- 2005-03-11 KR KR1020057016187A patent/KR100723104B1/en not_active IP Right Cessation
- 2005-03-11 EP EP20050721043 patent/EP1802869A1/en not_active Withdrawn
- 2005-03-11 WO PCT/JP2005/004856 patent/WO2006027864A1/en active Application Filing
- 2005-03-11 US US10/547,471 patent/US20080202613A1/en not_active Abandoned
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US4978285A (en) * | 1989-03-16 | 1990-12-18 | Empresa Brasileira De Compressores S.A. | Reed valve for hermetic compressor |
US5577901A (en) * | 1995-02-14 | 1996-11-26 | Samsung Electronics, Co., Ltd. | Compressor with valve unit for controlling suction and discharge of fluid |
US5775887A (en) * | 1995-04-20 | 1998-07-07 | L. G. Electronics Inc. | Spacer configuration for a discharge reed valve of a hermetic type compressor |
US20030075224A1 (en) * | 2001-10-19 | 2003-04-24 | Park Gyu-Chang | High efficient valve assembly of compressor |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150316044A1 (en) * | 2012-12-06 | 2015-11-05 | Carrier Corporation | Discharge Reed Valve for Reciprocating Refrigeration Compressor |
US10619629B2 (en) * | 2012-12-06 | 2020-04-14 | Carrier Corporation | Discharge reed valve for reciprocating refrigeration compressor |
US20170356441A1 (en) * | 2014-11-25 | 2017-12-14 | Whirlpool S.A. | Reciprocating Compressor Valves Arrangement |
US10174756B2 (en) * | 2014-11-25 | 2019-01-08 | Whirlpool S.A. | Reciprocating compressor valves arrangement |
US11378195B2 (en) * | 2020-04-06 | 2022-07-05 | Mikuni Corporation | Reed valve |
US20220333589A1 (en) * | 2021-04-16 | 2022-10-20 | Wen-San Chou | Air compressor |
US20220341410A1 (en) * | 2021-04-22 | 2022-10-27 | Wen-San Chou | Air stop sheet of piston of cylinder |
Also Published As
Publication number | Publication date |
---|---|
JP2006077579A (en) | 2006-03-23 |
EP1802869A1 (en) | 2007-07-04 |
WO2006027864A1 (en) | 2006-03-16 |
KR20060038911A (en) | 2006-05-04 |
KR100723104B1 (en) | 2007-05-30 |
CN100419261C (en) | 2008-09-17 |
CN1806122A (en) | 2006-07-19 |
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