WO2014091764A1 - 密閉型圧縮機および冷凍装置 - Google Patents
密閉型圧縮機および冷凍装置 Download PDFInfo
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- WO2014091764A1 WO2014091764A1 PCT/JP2013/007346 JP2013007346W WO2014091764A1 WO 2014091764 A1 WO2014091764 A1 WO 2014091764A1 JP 2013007346 W JP2013007346 W JP 2013007346W WO 2014091764 A1 WO2014091764 A1 WO 2014091764A1
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- WIPO (PCT)
- Prior art keywords
- suction
- suction hole
- communication pipe
- side opening
- cylinder
- Prior art date
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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
-
- 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
- F04B39/0027—Pulsation and noise damping means
- F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
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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
- F04B39/0027—Pulsation and noise damping means
- F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
- F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
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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
- 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
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- 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
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- 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
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
Definitions
- the present invention relates to a hermetic compressor used in a refrigeration cycle such as a refrigeration apparatus or an air conditioner, and a refrigeration apparatus using the same.
- the hermetic compressor is widely used in a refrigeration apparatus such as a refrigerator-freezer or an air conditioner.
- a refrigeration apparatus such as a refrigerator-freezer or an air conditioner.
- the efficiency has been increased.
- high reliability is desired.
- Patent Document 1 discloses a configuration in which a part of a suction hole provided in a valve plate is curved for the purpose of improving the efficiency and reliability of a hermetic compressor.
- the valve plate is provided so as to close the end of the cylinder, and has a suction hole and a discharge hole.
- a communication pipe of a suction muffler is connected to the suction hole, and refrigerant gas is sucked into the cylinder from the communication pipe through the suction hole.
- the suction muffler is located below the cylinder, and the communication pipe extends upward from the lower suction muffler. If the extending direction of the communication pipe is the vertical direction, the cylinder is provided in the horizontal direction.
- a valve plate is located at the end of the cylinder, and a communication pipe outlet is provided in the lateral direction at the upper end of the communication pipe.
- the communication pipe outlet is connected to the suction hole of the valve plate, thereby forming a suction flow path. Therefore, the refrigerant gas flow path from the communication pipe to the suction flow path (communication pipe outlet and suction hole) is a path that curves in the horizontal direction from the vertical direction at the upper end of the communication pipe.
- the suction hole 83 is formed in a substantially U shape, and further, between the opening on the cylinder side and the opening on the communication pipe side.
- a curved transition portion T is formed.
- the transition portion T establishes a duct portion by curving at least partly the inner side surface (internal profile) of the suction flow path 831.
- the refrigerant gas can easily smoothly transition from the communication pipe outlet 863 to the suction hole 83, and the suction resistance of the refrigerant gas can be suppressed. If the suction mass (refrigerant circulation amount) of refrigerant gas per unit time is increased by suppressing the suction resistance, the efficiency of the hermetic compressor is improved.
- the valve plate is generally manufactured by molding metal powder with a mold and sintering (powder metallurgy).
- the suction hole 83 has a complicated shape of a substantially U shape
- the molding of the mold becomes complicated when the mold is manufactured. Therefore, the mold cannot be easily manufactured, and as a result, the valve plate 80 cannot be easily manufactured.
- the communication pipe generally has a substantially circular cross section, but in the valve plate 80 configured as described above, the suction hole 83 has a substantially U-shape. Therefore, as shown in FIG. 11, in the suction flow path 831, even if the transition portion T is formed, the cross-sectional shape of the flow path changes from a substantially circular shape (communication pipe outlet portion 863) to a substantially U shape (suction hole). 83). As a result, the refrigerant gas suddenly flows from the wide cross-sectional flow path (communication pipe outlet 863) into the narrow cross-sectional flow path (suction hole 83), thereby increasing the refrigerant gas suction resistance.
- the flow of the refrigerant gas becomes faster near the suction hole.
- the suction hole 83 is substantially U-shaped, a difference occurs in the flow velocity of the refrigerant gas between the central portion and both side portions of the suction hole 83. It becomes easy.
- two types of flow that is, the flow at the center and the flow at both sides, are generated, and as a result, the refrigerant gas cannot smoothly flow into the cylinder.
- valve plate 80 having the above-described configuration when used, the suction resistance increases in the vicinity of the suction hole 83 due to the rapid change in the flow path area and the formation of two kinds of flows. Therefore, in a hermetic compressor provided with such a valve plate 80, the suction loss increases, and the compression efficiency decreases.
- the present invention has been made to solve such problems, and it is an object of the present invention to facilitate the manufacture of a valve plate and to provide a more efficient hermetic compressor.
- a hermetic compressor is a hermetic container in which lubricating oil is stored, an electric element accommodated in the hermetic container, and accommodated in the hermetic container, A compression element that is driven by the electric element and compresses the refrigerant.
- the compression element seals a cylinder that forms a compression chamber, one end of the cylinder, and a suction hole and a discharge hole.
- a suction plate that opens and closes the suction hole, and a suction muffler that is located below the cylinder, has a sound deadening space inside, and includes a communication pipe connected to the suction hole, The communication pipe extends upward from the suction muffler toward the end of the cylinder, and a communication pipe outlet portion communicating with the suction hole is provided at an upper end of the communication pipe.
- Has a communication opening that protrudes in a curved shape and the lower shape is a rectangular shape
- the suction hole has a closed curved shape in which the shape of the cylinder side opening has no recess
- the communication tube side The shape of the opening is similar to the communication opening of the communication pipe outlet, and the valve plate and the communication pipe have a peripheral surface above the communication opening of the communication pipe outlet and a peripheral surface above the suction hole. And are connected in a state where they correspond to each other.
- the lower peripheral surface of the suction hole has a curved portion that curves from the communication pipe side opening toward the cylinder side opening, or from the communication pipe side opening to the cylinder.
- An inclined portion that is inclined toward the side opening may be included.
- the present invention also includes a refrigeration apparatus having a refrigeration cycle including the hermetic compressor having the above-described configuration.
- FIG. 4 is a schematic cross-sectional view showing a configuration example in the vicinity of a suction pipe of a suction muffler shown in FIG. 3 and a suction hole of a valve plate. It is a perspective view from the communicating pipe side which shows the structural example of the valve plate which is used for the hermetic compressor shown in FIG. 1 and is partially illustrated in FIG.
- FIG. 7 is a schematic comparison between a cross-sectional view and a front view showing a configuration example of a suction hole formed in the valve plate shown in FIGS. 5 and 6.
- FIG. 7 is a schematic comparison between a cross-sectional view and a front view showing another configuration example of the suction hole formed in the valve plate shown in FIGS. 5 and 6.
- FIG. 7 is a schematic comparison between a cross-sectional view and a front view showing still another configuration example of the suction hole formed in the valve plate shown in FIGS. 5 and 6.
- It is a schematic diagram which shows the structural example of the goods storage apparatus which is an example of a freezing apparatus provided with the hermetic compressor shown in FIG. It is a typical contrast figure with a sectional view and a front view showing the composition near the valve plate in the conventional closed type compressor. It is a graph which shows the result of the Example and comparative example of this invention.
- a hermetic compressor includes a hermetically sealed container in which lubricating oil is stored, an electric element accommodated in the hermetic container, and is accommodated in the hermetic container and driven by the electric element to compress refrigerant.
- a compression element, the compression element forming a compression chamber, sealing one end of the cylinder, a valve plate having a suction hole and a discharge hole, and the suction hole.
- a suction lead that opens and closes, and a suction muffler that is located below the cylinder, has a sound deadening space inside, and includes a communication pipe connected to the suction hole, and the communication pipe extends from the suction muffler.
- a communication pipe outlet portion Extending upward toward the end of the cylinder, a communication pipe outlet portion is provided at the upper end thereof to communicate with the suction hole, and the communication pipe outlet portion has a protruding shape with an upper portion protruding in a curved shape.
- a lower opening has a communication opening having a rectangular shape
- the suction hole has a closed curved shape in which the cylinder side opening has no recess
- the shape of the communication pipe side opening has the communication pipe outlet portion.
- the valve plate and the communication pipe are connected in a state in which the peripheral surface on the upper side of the communication opening of the communication pipe outlet and the peripheral surface on the upper side of the suction hole are made to correspond to each other. It is the structure which is done.
- the suction hole formed in the valve plate is not a complicated shape, it is possible to easily manufacture a mold for manufacturing the valve plate. Therefore, the valve plate itself can be easily and inexpensively manufactured.
- the suction hole can rectify the flow of the refrigerant gas. Therefore, since the difference in the flow rate of the refrigerant gas is less likely to occur inside the suction hole, the refrigerant gas is smoothly introduced into the cylinder from the communication pipe via the suction channel. Thereby, since the suction resistance of the refrigerant gas can be effectively suppressed, the suction mass (refrigerant circulation amount) per unit time of the refrigerant gas can be increased. As a result, a highly efficient hermetic compressor can be provided.
- the lower peripheral surface of the suction hole has a curved portion that curves from the communication pipe side opening toward the cylinder side opening, or from the communication pipe side opening to the cylinder.
- the structure including the inclined part inclined toward the side opening may be included.
- the refrigerant gas smoothly flows into the suction hole from the communication pipe outlet by the curved portion or the inclined portion in the suction hole. Accordingly, the refrigerant gas suction resistance in the vicinity of the suction hole can be effectively suppressed, and the flow of the refrigerant gas toward the suction hole is further promoted. As a result, a more efficient hermetic compressor can be provided.
- the suction hole may be formed so that a cross-sectional area gradually decreases from the communication pipe side opening toward the cylinder side opening. .
- the rectifying action of the refrigerant gas by the suction hole can be improved, and the flow velocity of the refrigerant gas can be increased.
- the flow of the refrigerant gas flowing into the cylinder from the suction hole is further promoted, and the suction lead is opened more quickly.
- the cross-sectional area of the cylinder side opening of the suction hole is smaller than that of the communication pipe side opening, it is possible to suppress the stress generated in the portion that contacts the suction hole of the suction lead during compression. Therefore, the reliability of the inhalation lead can be increased. As a result, a more reliable hermetic compressor can be provided.
- the cylinder side opening of the suction hole is circular or elliptical, and the upper part of the communication opening of the communication pipe outlet is semicircular or semielliptical. It may be a configuration.
- the basic shape of the suction hole is circular or elliptical, compared to a conventional valve plate having a substantially U-shaped suction hole, modeling at the time of manufacturing the mold is simplified. Mold making is easier.
- the basic shape of the suction hole is circular or elliptical and the upper shape of the communication opening is semicircular or semielliptical
- the basic cross-sectional shape of the suction channel is substantially circular or elliptical. Can be. Therefore, the flowability of the refrigerant gas in the suction channel can be improved. As a result, a more reliable hermetic compressor can be provided.
- the refrigeration apparatus has a refrigeration cycle including the hermetic compressor configured as described above.
- the refrigeration apparatus since the refrigeration apparatus includes a refrigeration cycle equipped with a highly efficient hermetic compressor, an efficient cooling operation can be performed. As a result, a refrigeration apparatus with reduced power consumption (amount) can be provided.
- the hermetic compressor 10 includes a hermetic container 11, an electric element 12, and a compression element 13. As shown in FIG. 2, lubricating oil 14 is stored in the sealed container 11, and the electric element 12 and the compression element 13 are accommodated.
- the electric element 12 is composed of a stator and a rotor, and drives the compression element 13.
- the stator is arranged with a gap around the outer periphery of the rotor.
- the rotor fixes a shaft 21 that is a fixed shaft, and is configured to be rotatable together with the shaft 21 in a state of being fitted into the stator.
- the compression element 13 is driven by the electric element 12 and compresses the refrigerant gas.
- the compression element 13 includes a block 20, a shaft 21, a cylinder 22, a cylinder head 23, a piston 24, a connecting rod 25, a suction muffler 26, a valve plate 30, a suction lead not shown in FIGS. Discharge lead is provided.
- the shaft 21 is provided with an axial center along the vertical direction (longitudinal direction) in the sealed container 11 and includes a main shaft portion, an eccentric shaft, an oil supply pump, and the like.
- the main shaft portion is press-fitted and fixed to the rotor of the electric element 12, and the eccentric shaft is formed eccentric to the main shaft portion.
- the oil supply pump is provided on an eccentric shaft that is the lower end of the shaft 21, and a part of the oil supply pump is immersed in the stored lubricating oil 14 so that the lubricating oil 14 can be supplied.
- the block 20 includes a cylinder 22 having a bore, a bearing portion, and the like.
- the cylinder 22 is disposed along the horizontal direction (horizontal direction) in the sealed container 11 and is fixed to the bearing portion.
- the bore is configured as a substantially cylindrical recess having substantially the same diameter as the piston 24, and the piston 24 is inserted into the interior so as to be slidable back and forth.
- a compression chamber is formed by the cylinder 22 (inside the bore) and the piston 24, in which the refrigerant gas is compressed.
- the bearing part is being fixed to the block 20, and the shaft 21 is inserted in the state which can rotate.
- the piston 24 inserted into the bore of the cylinder 22 is connected to the connecting rod 25.
- the connecting rod 25 is a connecting means between the piston 24 and the shaft 21, and is connected to the eccentric shaft of the shaft 21.
- a piston 24 is inserted into one end of the bore, and the other end is sealed with a valve plate 30.
- the valve plate 30 is located between the cylinder 22 and the cylinder head 23. Therefore, one surface (cylinder side surface) of the valve plate 30 seals the end of the cylinder 22, and the cylinder head 23 is fixed to the other surface (communication tube side surface).
- the cylinder head 23 communicates with the compression chamber, and a discharge space is formed therein.
- the suction muffler 26 is located below the sealed container 11 when viewed from the cylinder 22 and the cylinder head 23.
- the suction muffler 26 is made of, for example, a resin such as polybutylene terephthalate (PBT), has a suction port (not shown), has a sound deadening space 261 inside, and further has a communication pipe 262 at the top.
- PBT polybutylene terephthalate
- the communication pipe 262 extends upward toward the end of the cylinder 22, and a communication pipe outlet 263 is provided at the upper end of the communication pipe 262 as shown in FIG. 3.
- the communication pipe outlet 263 has a communication opening 264 in which the upper shape 264a protrudes in a curved shape and the lower shape 264b has a rectangular shape.
- the upper shape 264a is substantially semicircular
- the lower shape 264b is horizontally long and substantially rectangular.
- the upper shape 264a may be a semi-elliptical shape, or may be another curved shape such as a parabolic shape.
- the lower shape 264b may be square.
- the communication pipe 262 is provided so as to be sandwiched between the cylinder head 23 and the valve plate 30.
- the periphery of the communication opening 264 at the communication pipe outlet 263 is a flat end surface 265.
- the end surface 265 is a surface that abuts on the communication pipe side surface 31 (the other surface) of the valve plate 30.
- the valve plate 30 is made of metal such as a sintered metal (sintered metal), for example, and is not shown in FIG. 4 and a suction hole 33 (hole surrounded by a one-dot chain line in the figure).
- a discharge hole is formed.
- a suction lead 27 is provided on the cylinder side surface 32 (the one surface) of the valve plate 30 so as to cover the suction hole 33, and the suction lead 27 opens and closes the suction hole 33. Further, a discharge hole (not shown) is opened and closed by a discharge lead (not shown).
- the communication pipe outlet 263 is connected to the suction hole 33 of the valve plate 30 via a gasket (or a known seal member) (not shown). A specific configuration of the valve plate 30 will be described later.
- the rotor of the electric element 12 is rotated by supplying electric power to the electric element 12 from a commercial power source (not shown). Since the rotor rotates the shaft 21, the eccentric shaft is also rotated by the rotation of the main shaft portion. The eccentric motion of the eccentric shaft relative to the main shaft portion is transmitted from the connecting rod 25 to the piston 24. Thereby, the piston 24 reciprocates in the bore of the cylinder 22.
- refrigerant gas is introduced into the sealed container 11 from a refrigeration cycle (cooling circuit, refrigerant circuit) (not shown), and is released into the sealed container 11.
- the opened refrigerant gas is sucked into the suction muffler 26 from the suction port.
- the sucked refrigerant gas is released into the sound deadening space 261 and then intermittently from the communication pipe 262 to the compression chamber (the space isolated by the cylinder 22 and the piston 24) through the suction hole 33 of the valve plate 30.
- the refrigerant gas sucked into the compression chamber is compressed in the compression chamber and discharged into the discharge space of the cylinder head 23 through the discharge hole of the valve plate 30.
- the refrigerant gas discharged into the discharge space is discharged to a refrigeration cycle (not shown). Then, the refrigerant gas circulates in the refrigeration cycle and is again introduced into the sealed container 11.
- valve plate 30 Next, a specific configuration of the valve plate 30 will be specifically described with reference to FIGS. 5 to 7 in addition to FIG.
- FIG. 5 is a perspective view of the valve plate 30 viewed from the communication pipe side surface 31
- FIG. 6 is a perspective view of the valve plate 30 viewed from the cylinder side surface 32.
- the opening on the communication pipe 262 side (the side opposite to the cylinder 22) in the suction hole 33 is a suction inlet side opening 332 (the opening region surrounded by a dotted line in FIG. 4).
- the opening on the cylinder 22 side in the suction hole 33 is a suction outlet side opening 333 (a region surrounded by a broken line in FIG. 4).
- the communication pipe outlet 263 is formed to extend in the horizontal direction when viewed from the communication pipe 262 main body along the vertical direction, and is connected to the suction inlet side opening 332 of the suction hole 33.
- the communication pipe outlet 263 and the suction hole 33 constitute a suction flow path 331 through which the refrigerant gas flows.
- the suction outlet side opening 333 (cylinder side opening) in the suction hole 33 has a closed curve shape with no recess.
- the specific shape of the closed curve shape is not particularly limited, but generally may be a circular shape or an elliptical shape.
- the suction outlet side opening 333 has a substantially circular shape as shown in FIG.
- the suction inlet side opening 332 (communication pipe side opening) in the suction hole 33 has a similar shape to the communication opening 264.
- the communication opening 264 has a substantially semicircular upper shape 264a and a substantially rectangular shape having a lower shape 264b. Therefore, the upper side of the suction inlet side 332 has a substantially semicircular shape and a rectangular lower portion. It has become a shape.
- the suction inlet side opening 332 is the same size as the communication opening 264 in the present embodiment, but may be a slightly smaller size.
- the upper peripheral surface of the communication opening 264 and the upper peripheral surface of the suction hole 33 correspond to each other as shown in FIG.
- the upper peripheral surface of the communication opening 264 and the upper peripheral surface of the suction hole 33 form a single surface having substantially no step.
- the lower peripheral surface of the communication opening 264 is located below the lower peripheral surface of the suction outlet side opening 333 of the suction hole 33.
- the lower peripheral surface of the suction hole 33 includes a curved portion 334 and an inclined portion 335 as shown in FIGS. 4, 5, and 7.
- the inclined surface 335 and the curved portion 334 substantially form one continuous surface between the surface and the lower peripheral surface of the suction hole 33.
- the curved portion 334 is a curved surface that curves from the suction inlet side opening 332 toward the suction outlet side opening 333.
- the inclined portion 335 is an inclined surface that is inclined from the suction inlet side opening 332 toward the suction outlet side opening 333.
- the inclined portion 335 is located on the communication tube 262 side, and the curved portion 334 is located on the cylinder 22 side.
- the inclined portion 335 is an inclined surface steeply upward as viewed from the suction inlet side opening 332, and the curved portion 334 is a surface continuous with the inclined portion 335 and below the suction outlet side opening 333.
- the surface is curved so as to rise slightly upward. Therefore, as shown in FIG. 7, when the suction hole 33 is viewed from the communication pipe 262 side toward the cylinder 22 side, the inclined portion 335 is located on the near side and the curved portion 334 is located on the far side.
- the specific configuration of the curved portion 334 or the inclined portion 335 is not particularly limited.
- the degree of bending of the curved portion 334 depends on the diameter of the suction hole 33, the relationship between the cross-sectional area of the suction inlet side opening 332 and the cross sectional area of the suction outlet side opening 333, the thickness of the valve plate 30 (ie, the extension of the suction hole 33).
- the length of the direction) can be appropriately set according to various conditions such as the compression performance of the hermetic compressor 10.
- the specific inclination angle of the inclined portion 335 is not particularly limited, but generally, it may be within a range of 35 to 55 ° with respect to the axial center of the suction hole 33 (particularly, the suction outlet side opening 333). It is sufficient that it is within a range of 45 ° ⁇ 5 °.
- the shape of the lower peripheral surface of the suction hole 33 is not limited to the configuration including both the curved portion 334 and the inclined portion 335 as shown in FIGS. 4, 5, and 7.
- the lower peripheral surface of the suction hole 33 may be only the inclined portion 335, or the lower peripheral surface of the suction hole 33 as shown in FIG. 9.
- the structure which the surface becomes only the curved part 334 may be sufficient.
- stretching direction of the suction hole 33 may be included, and another structure may be included.
- the shape of the suction inlet side opening 332 of the suction hole 33 is similar to the communication opening 264, and the valve plate 30 and the communication pipe 262 are arranged around the upper side of the communication opening 264 of the communication pipe outlet 263.
- the upper peripheral surface of the suction hole 33 may be connected to each other, and the shape of the suction hole 33 may be any type as long as the refrigerant gas suction resistance can be effectively suppressed.
- the shape can also be adopted.
- the basic shape of the suction hole 33 is a closed curve without a recess, such as a circular shape or an elliptical shape. Therefore, when manufacturing a mold for manufacturing the valve plate 30, it is not necessary to form a complicated shape, and it is possible to avoid complication of mold manufacturing. Therefore, the valve plate 30 itself can be easily manufactured, and an increase in manufacturing cost can be avoided or suppressed.
- the shape of the suction outlet side opening 333 (cylinder side opening) of the suction hole 33 is a closed curve as described above, but the shape of the suction inlet side opening 332 (communication pipe side opening) is the communication pipe outlet portion.
- the shape is similar to the communication opening 264 of H.263.
- the communication opening 264 has a protruding shape in which the upper shape 264a protrudes in a curved shape, and the lower shape 264b has a rectangular shape.
- the suction hole 33 is configured as described above, the conventional substantially U-shape is used. Unlike the suction hole 83, the flow rate of the refrigerant gas is unlikely to be different between the central part and both side parts of the suction hole 33. Therefore, it is possible to suppress the stagnation of the refrigerant gas at the connecting portion between the communication pipe outlet 263 and the suction hole 33, and the refrigerant gas can be smoothly flowed into the cylinder 22 from the communication pipe 262. As a result, an increase in refrigerant gas suction resistance in the vicinity of the suction hole 33 (and an increase in suction loss due to this) can be effectively suppressed.
- a curved portion 334 that curves from the suction inlet side opening 332 (communication pipe side opening) toward the suction outlet side opening 333 (cylinder side opening) is formed on the lower peripheral surface of the suction hole 33.
- an inclined portion 335 inclined from the intake inlet side opening 332 (communication pipe side opening) toward the intake outlet side opening 333 (cylinder side opening), or both the curved portion 334 and the inclined portion 335 are provided. .
- the suction flow path 331 configured by the communication pipe outlet 263 and the suction hole 33 is a direction (lateral direction, horizontal direction) orthogonal to (or intersecting) the extending direction (vertical direction, vertical direction) of the communication pipe 262. Will be stretched.
- the refrigerant gas that flows linearly from the suction muffler 26 via the communication pipe 262 flows in the bending direction (suction channel 331) at the upper end of the communication pipe 262 (communication pipe outlet 263).
- the flow velocity of the refrigerant gas is relatively high in the vicinity of the upper peripheral surface of the suction flow path 331, but the refrigerant gas tends to stagnate in the vicinity of the lower peripheral surface, and the flow velocity is relatively low.
- the refrigerant gas moves toward the cylinder 22 along the curved portion 334 or the inclined portion 335. Led. Therefore, the stagnation of the refrigerant gas is satisfactorily suppressed in the vicinity of the lower peripheral surface, and the decrease in the flow velocity is also suppressed. Thereby, since the flow of the refrigerant gas can be promoted as the entire suction channel 331, an increase in the suction resistance of the refrigerant gas and an increase in the suction loss can be effectively suppressed.
- valve plate 30 having the above-described configuration, the suction resistance and the suction loss of the refrigerant gas can be suppressed, so that the suction mass (refrigerant circulation amount) of the refrigerant gas per unit time can be increased. . As a result, the more efficient hermetic compressor 10 can be provided.
- the suction inlet side opening 332 has a larger sectional area
- the suction outlet side opening 333 has a smaller sectional area. Accordingly, the suction hole 33 is formed so that the cross-sectional area gradually decreases (becomes narrower) from the suction inlet side opening 332 (communication pipe side opening) toward the suction outlet side opening 333 (cylinder side opening). .
- FIG. 4 and 11 will be specifically described with reference to FIGS. 4 and 11 while comparing with the conventional configuration disclosed in Patent Document 1.
- the conventional valve plate 80 is located between the cylinder 22 and the cylinder head 23 as in the present embodiment, and the suction hole 83 is connected to the communication pipe outlet 863 of the communication pipe 862. is doing.
- a suction valve blade 88 suction valvevane, corresponding to the suction lead 27 in the present embodiment is also illustrated in the cylinder 22.
- the conventional valve plate 80 is not easy to manufacture because the suction hole 83 is substantially U-shaped. Further, in the conventional valve plate 80, even if the transition portion T is formed, the cross-sectional shape of the flow path suddenly changes from a substantially circular shape (communication pipe outlet portion 863) to a substantially U shape (suction hole 83). . Thereby, when the refrigerant gas flows into the cylinder 22 from the suction hole 83, the suction resistance of the refrigerant gas increases.
- a configuration in which the cross-sectional shape of the flow path (including the suction flow path 831) from the communication pipe 862 to the suction hole 83 is considered to be substantially circular.
- this configuration it is not possible to optimize both the amount of refrigerant gas sucked into the cylinder 22 and the stress generated in the suction valve blade 88 (suction lead 27) during the compression operation.
- the suction hole 33 is basically circular or elliptical, the shape on the side of the communication pipe 262 is similar to the communication opening 264, and the cylinder The cross-sectional area gradually decreases toward 22.
- the momentum can be given to the flow of the refrigerant gas
- the flow of the refrigerant gas to the suction hole 33 can be further promoted, and a suitable amount of the refrigerant gas can be introduced into the cylinder 22.
- the cross-sectional area of the suction hole 33 on the cylinder 22 side size of the suction outlet side opening 333
- the suction lead 27 can be opened quickly, so that the refrigerant gas suction resistance can be further suppressed. Therefore, it is possible to provide the hermetic compressor 10 that is more efficient.
- the relationship between the sectional area of the suction inlet side opening 332 and the sectional area of the suction outlet side opening 333 is not particularly limited, but in this embodiment, the sectional area of the suction inlet side opening 332 is the sectional area of the suction outlet side opening 333.
- the content is preferably in the range of 150 to 250%, more preferably in the range of 160 to 200%.
- the change in the cross-sectional area of the suction flow path 331 can be optimized. Therefore, when the refrigerant gas flows into the suction hole 33 from the communication pipe outlet 263, an increase in suction resistance can be suppressed in a state where the effective area of the suction hole 33 is sufficiently secured. As a result, the refrigerant gas intake mass per unit time (refrigerant circulation amount) can be increased, and the hermetic compressor 10 can be made more efficient.
- the suction loss significantly increases when the circulation amount of the refrigerant gas increases. Resulting in.
- the cross-sectional area of the suction inlet side opening 332 exceeds 250% with respect to the cross-sectional area of the suction outlet side opening 333, the suction loss significantly increases when the circulation amount of the refrigerant gas decreases. Therefore, if the cross-sectional area of the suction inlet side opening 332 deviates from the above range with respect to the cross-sectional area of the suction outlet side opening 333, the efficiency of the hermetic compressor 10 decreases.
- the hermetic compressor according to the present invention stores lubricating oil in a hermetic container, and houses an electric element and a compression element that is driven by the electric element and compresses refrigerant gas.
- a suction muffler having a communication pipe and a cylinder head, and the communication pipe is formed to extend in the horizontal direction with respect to the axial center of the suction hole, and is connected to the suction hole.
- the communication pipe outlet portion is formed as a combination of a semicircular shape and a substantially quadrangular shape extending vertically downward with respect to the axis of the suction hole. Is circular, Suction inlet provided in the lube plate (intake side opening) are those formed by the similar shape communicating tube outlet.
- a suction flow path for introducing the refrigerant gas from the end face of the communication pipe outlet portion toward the suction hole is formed, and the suction flow path has an end face of the suction inlet of the valve plate. It is preferable that a curved portion or an inclined portion that is directed to the suction hole is provided.
- the refrigerant gas is rectified through the suction flow path and introduced into the cylinder. Therefore, the refrigerant gas can be smoothly sucked into the cylinder, and the refrigerant gas suction resistance can be effectively suppressed. As a result, since the suction mass (refrigerant circulation amount) per unit time of the refrigerant gas is increased, a highly efficient hermetic compressor can be provided.
- the hermetic compressor 10 according to the present invention can be widely and suitably used in a refrigeration cycle or various devices (refrigeration apparatuses) having a configuration substantially equivalent to this.
- refrigerators household refrigerators, commercial refrigerators
- ice machines showcases
- dehumidifiers heat pump water heaters
- heat pump wash dryers vending machines
- air conditioners air compressors, etc.
- it does not specifically limit.
- the 10 includes a storage device body 41, a condenser 51, a decompression device 52, an evaporator 53, a blower 54, a pipe 55, a hermetic compressor 10, and the like.
- the condenser 51, the decompression device 52, the evaporator 53, and the hermetic compressor 10 are connected in a ring shape by a pipe 55 to constitute a refrigeration cycle.
- R600a is used as the refrigerant gas.
- a first storage chamber 42 and a second storage chamber 43 are provided in front of the storage device main body 41, and the refrigeration cycle (condenser 51, decompression device 52, evaporator 53, blower 54, hermetic compression is provided in the rear.
- a machine 10 and piping 55) and a blower 54 are provided.
- Each of the first storage chamber 42 and the second storage chamber 43 has an opening on the front surface, and the periphery other than the front surface is covered with a heat insulating material.
- a first door 44 corresponding to the opening is provided on the front surface of the first storage chamber 42, and a second door 45 corresponding to the opening is provided on the front surface of the second storage chamber 43. Both the first door 44 and the second door 45 have heat insulation properties, and are provided so that the opening can be opened and closed.
- the first storage chamber 42 and the second storage chamber 43 communicate with each other via a front communication passage 46 and a rear communication passage 47.
- the evaporator 53 is disposed in the first storage chamber 42 behind the storage device body 41. Further, the blower 54 is disposed behind the evaporator 53 in the first storage chamber 42. By operating the refrigeration cycle, the evaporator 53 cools the inside of the first storage chamber 42, thereby generating cold air.
- the blower 54 circulates the generated cool air in the first storage chamber 42 as indicated by an arrow Fa in the drawing. As described above, since the first storage chamber 42 and the second storage chamber 43 communicate with each other through the front and rear communication passages 46 and 47, a part of the cool air in the first storage chamber 42 is indicated by an arrow Fb in the figure. As shown in the figure, the second storage chamber 43 is also circulated by the communication passages 46 and 47. Therefore, the insides of the first storage chamber 42 and the second storage chamber 43 are cooled.
- the hermetic compressor 10 described in the first embodiment is used in the refrigeration cycle. Since this hermetic compressor 10 can easily manufacture the valve plate 30, it is efficient and inexpensive while having good productivity. By mounting such a hermetic compressor 10, the article storage device 40 can be efficiently cooled. As a result, power consumption (amount) can be effectively suppressed.
- the hermetic compressor 10 described in the first embodiment was incorporated into a refrigeration cycle in which R600a was sealed as a refrigerant gas.
- the relationship between the internal pressure (unit: kPa) of the cylinder 22 and the crank angle (unit: °) is verified by operating the hermetic compressor 10 under conditions of a condensation temperature of 25 to 60 ° C and an evaporation temperature of -20 to -40 ° C. did. The results are shown in the graph on FIG.
- the present invention can be suitably used not only in the field of a hermetic compressor, but also widely used in various devices having a configuration substantially equivalent to the refrigeration cycle using the hermetic compressor.
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Abstract
Description
[密閉型圧縮機]
まず、本実施の形態に係る密閉型圧縮機の具体的な構成の一例について、図1~図4を参照して説明する。図1および図2に示すように、本実施の形態に係る密閉型圧縮機10は、密閉容器11、電動要素12、および圧縮要素13を備えている。密閉容器11の内部には、図2に示すように潤滑油14が貯留されるとともに、電動要素12および圧縮要素13が収容されている。
次に、バルブプレート30の具体的な構成について、図4に加えて、図5~図7を参照して具体的に説明する。
ここで、本実施の形態では、吸入孔33のうち、吸入入口側開口332の方が断面積が大きく、吸入出口側開口333の方が断面積が小さい。したがって、吸入孔33は、吸入入口側開口332(連通管側開口)から吸入出口側開口333(シリンダ側開口)に向けて、徐々に断面積が小さくなる(狭くなる)ように形成されている。この点について、特許文献1に開示される従来の構成と対比しながら、図4および図11を参照して具体的に説明する。
本実施の形態2では、前記実施の形態1で説明した密閉型圧縮機10を備える冷凍装置の一例について、図10を参照して具体的に説明する。
冷媒ガスとしてR600aを封入した冷凍サイクルに、前記実施の形態1で説明した密閉型圧縮機10を組み込んだ。密閉型圧縮機10を凝縮温度25~60℃かつ蒸発温度-20~-40℃の条件で動作させて、シリンダ22の内圧(単位:kPa)とクランク角(単位:°)との関係を検証した。その結果を図12上のグラフに示す。
前記実施例と同様にR600aを封入した冷凍サイクルに、従来の密閉型圧縮機(図11参照)を組み込んだ。この従来の密閉型圧縮機を前記実施例と同様の条件で動作させ、シリンダ22の内圧とクランク角との関係を検証した。その結果を図12下のグラフに示す。
図12に示す上下のグラフには、低圧側の設定圧力を破線で示しており、この破線より下になる領域の面積が吸入損失に相当する。比較例すなわち従来の密閉型圧縮機に比べて、実施例すなわち本発明に係る密閉型圧縮機10の方が、破線より下の面積が明らかに小さくなっている。それゆえ、本発明によれば吸入損失を有効に抑制することができる。
11 密閉容器
12 電動要素
13 圧縮要素
14 潤滑油
22 シリンダ
23 シリンダヘッド
24 ピストン
26 サクションマフラー
27 吸入リード
30 バルブプレート
33 吸入孔
34 吐出孔
40 物品貯蔵装置(冷凍装置)
51 凝縮器
52 減圧装置
53 蒸発器
54 送風機
262 連通管
263 連通管出口部
264 連通開口
264a 上部形状
264b 下部形状
265 連通管出口部の端面
331 吸入流路
332 吸入入口側開口(連通管側開口)
333 吸入出口側開口(シリンダ側開口)
334 湾曲部
335 傾斜部
Claims (5)
- 潤滑油が貯留される密閉容器と、
当該密閉容器内に収容される電動要素と、
前記密閉容器内に収容され、前記電動要素により駆動され冷媒を圧縮する圧縮要素と、を備え、
前記圧縮要素は、
圧縮室を形成するシリンダと、
前記シリンダの一方の端部を封止するとともに、吸入孔および吐出孔が形成されたバルブプレートと、
前記吸入孔を開閉する吸入リードと、
前記シリンダよりも下方に位置し、内部に消音空間を有し、前記吸入孔に連結される連通管を備えるサクションマフラーと、
を備え、
前記連通管は、前記サクションマフラーから前記シリンダの端部に向かって上方に延伸し、その上端に、前記吸入孔に連通する連通管出口部が設けられ、
前記連通管出口部は、上部形状が曲線状に突出した突出形状であり、かつ、下部形状が矩形状である連通開口を有し、
前記吸入孔は、前記シリンダ側開口の形状が凹部の無い閉曲線状であり、前記連通管側開口の形状が前記連通管出口部の連通開口と相似形状であり、
前記バルブプレートおよび前記連通管は、前記連通管出口部の連通開口の上側の周面と、前記吸入孔の上側の周面とを対応させた状態で連結されている、
密閉型圧縮機。 - 前記吸入孔の下側の周面には、前記連通管側開口から前記シリンダ側開口に向かって湾曲する湾曲部、または、前記連通管側開口から前記シリンダ側開口に向かって傾斜する傾斜部が含まれている、
請求項1に記載の密閉型圧縮機。 - 前記吸入孔は、前記連通管側開口から前記シリンダ側開口に向けて、徐々に断面積が小さくなるように形成されている、
請求項1または2に記載の密閉型圧縮機。 - 前記吸入孔のシリンダ側開口は、円形状または楕円形状であり、
前記連通管出口部の連通開口の上部は、半円形状または半楕円形状である、
請求項1から3のいずれか1項に記載の密閉型圧縮機。 - 請求項1から4のいずれか1項に記載の密閉型圧縮機を含む冷凍サイクルを備えている、
冷凍装置。
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US14/423,955 US10167860B2 (en) | 2012-12-13 | 2013-12-13 | Hermetic compressor and refrigeration apparatus |
CN201380044885.9A CN104603461B (zh) | 2012-12-13 | 2013-12-13 | 密闭型压缩机和制冷装置 |
JP2014551898A JP6286364B2 (ja) | 2012-12-13 | 2013-12-13 | 密閉型圧縮機および冷凍装置 |
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WO2017194516A1 (en) | 2016-05-10 | 2017-11-16 | Arcelik Anonim Sirketi | A hermetic compressor with improved sealing |
JP2018502252A (ja) * | 2014-12-29 | 2018-01-25 | クルトン プレミア カンパニー リミテッドKulthorn Premier Company Limited | コンプレッサのための冷媒流量を増加させるために変更された吸入孔を有するバルブプレート |
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