Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
• • 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
  • F04B39/10—Adaptations or arrangements of distribution members
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2251/00—Material properties
  • F05C2251/14—Self lubricating materials; Solid lubricants
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2253/00—Other material characteristics; Treatment of material
  • F05C2253/12—Coating

Definitions

• the present invention relates to a discharge valve device of a hermetic compressor used mainly in a refrigeration/cold-storage apparatus and the like.
• Fig. 13 is a sectional view of the conventional hermetic compressor
• Fig. 14 is a plan view of the conventional hermetic compressor
• Fig.15 is an explodedview of the conventional hermetic compressor
• Fig. 16 is a side sectional view of a discharge valve device of the conventional hermetic compressor
• Fig. 17 is a spring characteristic diagram of the conventional discharge valve device.
• hermetic container 401 possesses discharge pipe 402 and suction pipe 403, which are connected to a cooling system (not shown in the drawing) .
• oil 404 is stored, andmotor element 407, which includes stator 405 and rotor 406, and compression mechanism 408 driven by it are accommodated, and an inside is filled with refrigerant 409.
• Cylinder 410 possesses substantially cylindrical compression chamber 411 , and bearing part 412.
• Valve plate 413 possesses discharge valve device 414 in a side reverse to cylinder 410, and closes compression chamber 411.
• Head 415 covers valve plate 413.
• Suction muffler 416 is constituted from tail pipe 417 that is a suction passage of a refrigerant gas, which has been opened into hermetic container 401 , and a sound deadening space (not shown in the drawing) , and the other end is communicated into compression chamber 411.
• Crankshaft 418 has main shaft part 419 and eccentric part 420, and is shaft-supported to bearing part 412 of cylinder 410, and rotor 406 is pressing-in fixed.
• Piston 421 is inserted to cylinder 410 so as to be capable of reciprocating/sliding, and between it and eccentric part 420 is connected by connecting rod 422.
• discharge valve device 414 possessed in compression mechanism 408.
• valve plate 413 there are provided, in a side reverse to cylinder 410, discharge hole 423 communicating with cylinder 410, and valve seat part 424 having been formed so as to surround discharge hole 423.
• Discharge reed 425 consists of a leaf springmaterial , and possesses opening/closing part 426 for opening and closing valve seat part 424.
• Head 415 possesses discharge chamber 427 accommodating discharge valve device 414, and monolithically forms stopper 428 regulating a degree of opening of discharge reed 425.
• Valve plate 413, discharge reed 425 and head 415 are disposed in this order, and monolithically connected to cylinder 410 side by bolt 429.
• hermetic compressor having been constituted like the above, its operation is explained below. If electricity is supplied to motor element 407 , rotor 406 rotates , and crankshaft 418 is rotation-driven. At this time, by the fact that an eccentric rotation motion of eccentric part 420 is transmitted to piston 421 through connecting rod 422 , piston 421 performs a reciprocating motion in compression chamber 411. Following upon the reciprocating motion of piston 421, refrigerant 409 in hermetic container 401 is sucked into compression chamber 411 from suction muffler 416, and refrigerant 409 of a low pressure flows into hermetic container 401 from the cooling system (not shown in the drawing) while passing through suction pipe 403.
• Refrigerant 409 having been sucked into compression chamber 411 is compressed by a motion of piston 421, and exhausted into discharge chamber 427 of head 415 via discharge valve device 414 of valve plate 413. Additionally, refrigerant 409 gas of a high pressure having been exhausted into discharge chamber 427 of head 415 is exhausted to the cooling system (not shown in the drawing) from discharge pipe 402.
• the discharge valve device 414 performs such a predetermined opening/closing operation that, by the fact that discharge reed 425 opens, compression chamber 411 and discharge chamber 427 of head 415 are communicated through discharge hole 423 and, by the fact that discharge reed 425 closes, the communication between compression chamber 411 and discharge chamber 427 of head 415 is interrupted.
• discharge reed 425 can obtain only a constant spring characteristic until it touches stopper 428.
• discharge valve device 414 When discharge reed 425 of discharge valve device 414 opens, if a pressure difference between an inside of cylinder 410 and an inside of discharge chamber 427 of head 415 becomes large, opening/closing part 426 of discharge reed 425 is pushed up by compressed refrigerant 409 gas of the high pressure, it touches stopper 428. Further, if the pressure difference between the inside of cylinder 410 and the inside of discharge chamber 427 of head 415 becomes small, opening/closing part 426 of discharge reed 425 separates from stopper 428 by a restoring force of an elastic deformation, thereby closing valve seat part 424.
• a spring characteristic of discharge reed 425, until it touches stopper 428 shows the constant spring characteristic having no inflection point as shown in Fig. 17.
• the spring characteristic of discharge reed 425 is weakened, there is obtained the degree of opening of discharge reed 425 until it touches stopper 428, which has corresponded to a gas flow rate, by the constant spring characteristic, so that discharge reed 425 is easy to open, and it is possible to reduce an excessive compression.
• the hermetic compressor of the present invention is one in which the stopper is provided, in a position corresponding to a movable end vicinity of the discharge reed, with a first regulation part having a predetermined clearance from the movable end vicinity of the discharge reed, and can have such a two-stage spring characteristic that, until the movable end vicinity of the discharge reed touches the first regulation part, the spring characteristic is weak and, after the touch, the spring characteristic is strong.
• Fig. 1 is a sectional view of a hermetic compressor in an embodiment 1 of the present invention.
• Fig. 2 is a plan view of the hermetic compressor in the embodiment 1 of the present invention.
• Fig. 3 is an exploded view of a discharge valve device in the embodiment 1 of the present invention.
• Fig. 4 is a side sectional view at a medium-term open time of the discharge valve device in the embodiment 1 of the present invention.
• Fig. 5 is a side sectional view at a terminal open time of the discharge valve device in the embodiment 1 of the present invention.
• Fig.6 is a spring characteristic diagram of the discharge valve device in the embodiment 1 of the present invention.
• Fig. 7 is a sectional view of a hermetic compressor in an embodiment 2 of the present invention.
• Fig. 8 is a plan view of the hermetic compressor in the embodiment 2 of the present invention.
• Fig. 9 is an exploded view of a discharge valve device in the embodiment 2 of the present invention.
• Fig. 10 is a side sectional view at a medium-term open time of the discharge valve device in the embodiment 2 of the present invention.
• Fig. 11 is a side sectional view at a terminal open time of the discharge valve device in the embodiment 2 of the present invention.
• Fig.12 is a spring characteristic diagramof the discharge valve device in the embodiment 2 of the present invention.
• Fig. 13 is a sectional view of a conventional hermetic compressor.
• Fig. 14 is a plan view of the conventional hermetic compressor.
• Fig. 15 is an exploded view of a discharge valve device of the conventional hermetic compressor.
• Fig. 16 is a side sectional view of the discharge valve device of the conventional hermetic compressor.
• Fig.17 is a spring characteristic diagramof the discharge valve device of the conventional hermetic compressor.
• Fig. 1 is a sectional view of a hermetic compressor in an embodiment 1 of the present invention
• Fig. 2 is a plan view of the hermetic compressor in the embodiment 1 of the present invention
• Fig. 3 is an exploded view of a discharge valve device in the embodiment 1 of the present invention
• Fig. 4 is a side sectional view at a medium-term open time of the discharge valve device in the embodiment 1 of the present invention
• Fig. 5 is a side sectional view at a terminal open time of the discharge valve device in the embodiment 1 of the present invention
• Fig.6 is a spring characteristic diagram of the discharge valve device in the embodiment 1 of the present invention.
• hermetic container 101 possesses discharge pipe 102 and suction pipe 103, which are connected to the cooling system (not shown in the drawing) .
• oil 104 is stored, and motor element 107, which includes stator 105 and rotor 106, and compression mechanism 108 driven by it are accommodated, and an inside is filled with refrigerant 109.
• Refrigerant 109 is desirablyarefrigerant other than a specifiedfIon object having corresponded to an environmental issue in recent years , and is R134a or R600a which is a natural refrigerant, or the like.
• Cylinder 110 possesses substantially cylindrical compression chamber 111 , and bearing part 112.
• Valve plate 113 possesses discharge valve device 114 in a side reverse to cylinder 110, and closes compression chamber 111.
• Head 116 having formed discharge chamber 115 accommodating discharge valve device 114 covers valve plate 113.
• Suction muffler 117 is constituted from tail pipe 118 that is a suction passage of a refrigerant gas , which has been opened into hermetic container 101, and a sound deadening space (not shown in the drawing) , and the other end is communicated into compression chamber 111.
• crankshaft 119 has main shaft part 120 and eccentric part 121, and is shaft-supported to bearing part 112 of cylinder 110, and rotor 106 is pressing-in fixed.
• Piston 122 is inserted to cylinder 110 so as to be capable of reciprocating/sliding, and between it and eccentric part 121 is connected by connecting rod 123.
• discharge valve device 114 possessed in compression mechanism 108.
• valve plate 113 there are provided, in a side reverse to cylinder 110, discharge hole 124 communicating with cylinder 110, and valve seat part 125 having been formed so as to surround discharge hole 124.
• Discharge reed 126 consists of a leaf springmaterial, and possesses opening/closing part 129 for opening/closing valve seat part 125.
• Stopper 127 regulates the degree of opening of discharge reed 126 and possesses , in a position corresponding to a movable end vicinity of discharge reed 126, first regulation part 132 having provided a predetermined clearance from discharge reed 126. Further, stopper 127 possesses, in a position corresponding to opening/closing part 129 vicinity of discharge reed 126, second regulation part 133 having a clearance wider than first regulation part 132.
• Discharge reed 126 and stopper 127 are disposed in this order, and monolithically connected and fixed to valve plate 113 by rivet 134.
• hermetic compressor having been constituted like the above, its operation and action are explained below. If the electricity is supplied to motor element 107, rotor 106 rotates, and crankshaft 119 is rotation-driven. At this time. by the fact that the eccentric rotation motion of eccentric part 121 is transmitted to piston 122 through connecting rod 123 , piston 122 performs the reciprocatingmotion in compression chamber 111. Following upon the reciprocating motion of piston 122, refrigerant 109 in hermetic container 101 is sucked into compression chamber 111 from suction muffler 117, and refrigerant 109 of the lowpressure flows into hermetic container 101 from the cooling system (not shown in the drawing) while passing through suction pipe 103.
• Refrigerant 109 having been sucked into compression chamber 111 is compressed, andexhausted into discharge chamber 115 via discharge valve device 114 of valve plate 113. Additionally, refrigerant 109 gas of the high pressure having been exhausted into discharge chamber 115 is exhausted to the cooling system (not shown in the drawing) from discharge pipe 102.
• the discharge valve device 114 performs such an opening/closing operation that, by the fact that discharge reed 126 opens, compression chamber 111 inside and head 116 inside are communicated through discharge hole 124 and, by the fact that discharge reed 126 closes, the communication between compression chamber 111 and head 116 is interrupted.
• discharge reed 126 touches first regulation part 132 of stopper 127
• discharge reed 126 opens by a reaction force of refrigerant 109 gas of the high pressure.
• first regulation part 132 of stopper 127 the constant spring characteristic having no inflection point is obtained and, by the fact that a first spring constant during this term is made small, the spring force is weakened, thereby making it easy to open.
• discharge valve device 114 which is easy to open and whose closing speed is rapid, so that it is possible to provide the hermetic compressor inwhich the excessive compression is small , whose refrigerating ability is high, and in which the energy efficiency is high.
• the embodiment 1 although there has been exemplified one in which one first regulation part 132 has been provided, by providing this plurally, it is possible to set a spring characteristic having possessed a more suitable easiness in opening and a more suitable reaction force in compliance with an opening of discharge reed 126 and, additionally, it is possible to provide the hermetic compressor in which the excessive compression is small, whose refrigerating ability is high, and in which the energy efficiency is high.
• discharge reed 126 After discharge reed 126 has touched first regulation part 132 of stopper 127, if it opens additionally, it touches second regulation part 133. Since second regulation part 133 touches opening/closing part 129 vicinity of discharge reed 126, discharge reed 126 is scarcely displaced more than it.
• discharge reed 126 touches the touching face of stopper 127, although discharge reed 126 undergoes an impact, in the embodiment 1, there is designed such that the touching face of stopper 127 is worked like an arc, and a stress of the impact applied to discharge reed 126 scarcely affects on a characteristic and a reliability of discharge valve device 114.
• Fig. 7 is a sectional view of a hermetic compressor in an embodiment 2 of the present invention
• Fig. 8 is a plan view of the hermetic compressor in the embodiment 2 of the present invention
• Fig. 9 is an exploded view of a discharge valve device in the embodiment 2 of the present invention
• Fig. 10 is a side sectional view at a medium-term open time of the discharge valve device in the embodiment 2 of the present invention
• Fig. 11 is a side sectional view at a terminal open time of the discharge valve device in the embodiment 2 of the present invention
• Fig. 12 is a spring characteristic diagram of the discharge valve device in the embodiment 2 of the present invention.
• hermetic container 201 possesses discharge pipe 202 and suction pipe 203, which are connected to the cooling system (not shown in the drawing) .
• Hermetic container 201 stores, in its bottom part , oil 204 and accommodates motor element 207 , which includes stator 205 and rotor 206, and compression mechanism 208 driven by it, and the inside is filled with refrigerant 209.
• Refrigerant 209 is desirably the refrigerant other than the specified fIon object having corresponded to the environmental issue in recent years , and is R134a or R600a which is the natural refrigerant, or the like.
• Cylinder 210 possesses substantially cylindrical compression chamber 211 , and bearing part 212.
• Valve plate 213 possesses discharge valve device 214 in a side reverse to cylinder 210, and closes compression chamber 211.
• Head 216 having formed discharge chamber 215 accommodating discharge valve device 214 covers valve plate 213.
• Suction muffler 217 is constituted from tail pipe 218 that is the suction passage of the refrigerant gas, which has been opened into hermetic container 201 , and the sound deadening space (not shown in the drawing) , and the other end is communicated into compression chamber 211.
• crankshaft 219 has main shaft part 220 and eccentric part 221, and is shaft-supported to bearing part 212 of cylinder 210, and rotor 206 is pressing-in fixed.
• Piston 222 is inserted to cylinder 210 so as to be capable of reciprocating/sliding, and between it and eccentric part 221 is connected by connecting rod 223.
• discharge valve device 214 possessed in compression mechanism 208.
• valve plate 213 there are provided, in a side reverse to cylinder 210, discharge hole 224 communicating with cylinder 210, and valve seat part 225 having been formed so as to surround discharge hole 224.
• Discharge reed 226 consists of the leaf spring material, and possesses opening/closing part 229 for opening and closing valve seat part 225.
• Stopper 227 regulating the degree of opening of discharge reed 226 is formed monolithically with head 216, and has, in a position corresponding to a movable end vicinity of discharge reed 226, first regulation part 232 having a predetermined clearance from the movable end vicinity of discharge reed 226. Further, it has , in a position corresponding to opening/closing part 229, second regulation part 233 having a clearance larger than first regulation part 232.
• cap 234 having been molded from tetrafluoroethylene which is a solid lubricating material having a noncohesive property and having a refrigerant resistance, a chemical stability and a heat resistance.
• Valve plate 213, discharge reed 226 and head 216 are disposed in this order, and fixed to cylinder 210 side by bolt 235.
• hermetic compressor having been constituted like the above, its operation and action are explained below. If the electricity is supplied to motor element 207, rotor 206 rotates, and crankshaft 219 is rotation-driven. At this time, by the fact that the eccentric rotation motion of eccentric part 221 is transmitted to piston 222 through connecting rod 223 , piston 222 performs the reciprocatingmotion in compression chamber 211.
• refrigerant 209 in hermetic container 201 is sucked into compression chamber 211 from suction muffler 217, and refrigerant 209 of the lowpressure flows intohermetic container 201 from the cooling system (not shown in the drawing) while passing through suction pipe 203.
• Refrigerant 209 having been sucked into compression chamber 211 is compressed, andexhausted into head 216 via discharge valve device 214 of valve plate 213.
• refrigerant 209 gas of the high pressure having been exhausted into discharge chamber 215 is exhausted to the cooling system (not shown in the drawing) from discharge pipe 202.
• the discharge valve device 214 performs such an opening/closing operation that, by the fact that discharge reed 226 opens, compression chamber 211 inside and head 216 inside are communicated through discharge hole 224 and, by the fact that discharge reed 226 closes, the communication between compression chamber 211 and head 216 is interrupted.
• discharge reed 226 opens by the reaction force of refrigerant 209 gas of the high pressure.
• first regulation part 232 of stopper 227 the constant spring characteristic having no inflection point is obtained and, by the fact that the first spring constant during this term is made small, the spring force is weakened, thereby making it easy to open.
• discharge reed 226 has touched first regulationpart 232 of stopper 227 , since discharge reed 226 additionallybendswitha site touching first regulation part 232 being made the supporting point, the second spring constant during this term becomes large in comparison with the first spring constant.
• the strong reaction force of the spring is obtained by the strong spring force and, by the fact that this strong reaction force of the spring acts when discharge reed 226 has entered into its closing process, the speed at which discharge reed 226 closes becomes rapid.
• the spring force is weak and, after the touch, the spring force is strong, there is obtained discharge valve device 214 which is easy to open and whose closing speed is rapid.
• the hermetic compressor inwhich the excessive compression is small, whose refrigerating ability is high, and in which the energy efficiency is high.
• the embodiment 2 although there has been exemplified one in which one first regulation part 232 has been provided, by providing this plurally, it is possible to set the spring characteristic having possessed the more suitable easiness in opening and the more suitable reaction force in compliance with the opening of discharge reed 226 and, additionally, it is possible to provide the hermetic compressor in which the excessive compression is small, whose refrigerating ability is high, and in which the energy efficiency is high.
• discharge reed 226 has touched first regulation part 232 of stopper 227, if it opens additionally, it touches second regulation part 233. Since second regulation part 233 touches opening/closing part 229 vicinity of discharge reed 226, discharge reed 226 is scarcely displaced more than it.
• stopper 227 and head 216 are monolithically molded by a die casting and first regulation part 232 and second regulation part 233 are formed on the same die , so height dimensions of first regulation part 232 and second regulation part 233 reflect intact a die dimension accuracy.
• the dimension accuracy of the die is controlled in several tens micron-meters or less, it is possible to obtain a high dimension accuracy without a necessity to especially work each face of first regulation part 232 and second regulation part 233, so that it is possible to cause a high production efficiency and a stable quality to coexist.
• cap 234 is molded from a fluoric resin represented by the tetrafluoroethylene.
• the tetrafluoroethylene is noncohesive, and possesses an extremely high solid lubricity. Accordingly, even if cap 234 and discharge reed 226 rub, since surfaces mutually slide while scarcely being caught, there is suppressed an abrasion by a metal contact occurring when discharge reed 226 touches stopper 227 .
• the tetrafluoroethylene has a noncohesive nature, and thus discharge reed 226 is easy to be separated from stopper 227, so that it is possible to prevent a delay in closing of discharge reed 226 and increase the refrigerating ability of the hermetic compressor.
• the tetrafluoroethylene is high in its vibration damping ability and has an elasticity, an impact when discharge reed 226 and stopper 227 touch is relaxed, a generation of an impact noise is suppressed, and further it is possible to prevent a breakage of discharge reed 226 by the impact, so that it is possible to provide a hermetic compressor which is silent and whose reliability is high.
• the hermetic compressor concerned with the present invention can provide a hermetic compressor in which the delay in closing is improved and the energy efficiency has been raised, it can be applied also to uses of an air conditioner, arefrigeration/air-conditioning equipment , and the like .

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Compressor (AREA)
• Check Valves (AREA)

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• 2007
  • 2007-04-24 CN CNA2007800004636A patent/CN101321952A/zh active Pending
  • 2007-04-24 JP JP2007544668A patent/JP2008534832A/ja not_active Withdrawn
  • 2007-04-24 WO PCT/JP2007/059342 patent/WO2007126105A1/en active Application Filing
  • 2007-04-24 US US11/911,605 patent/US20090291007A1/en not_active Abandoned
  • 2007-04-24 KR KR1020077024373A patent/KR100875017B1/ko not_active IP Right Cessation
  • 2007-04-24 EP EP07742777A patent/EP1875074A1/en not_active Withdrawn

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