WO2007102496A1 - 冷凍装置 - Google Patents
冷凍装置 Download PDFInfo
- Publication number
- WO2007102496A1 WO2007102496A1 PCT/JP2007/054305 JP2007054305W WO2007102496A1 WO 2007102496 A1 WO2007102496 A1 WO 2007102496A1 JP 2007054305 W JP2007054305 W JP 2007054305W WO 2007102496 A1 WO2007102496 A1 WO 2007102496A1
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- WIPO (PCT)
- Prior art keywords
- compression
- compression chamber
- compressor
- refrigerant
- chamber
- Prior art date
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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
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/04—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents of internal-axis type
- F04C18/045—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents of internal-axis type having a C-shaped piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/32—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members
- F04C18/322—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members with vanes hinged to the outer member and reciprocating with respect to the outer member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/02—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0021—Systems for the equilibration of forces acting on the pump
- F04C29/0035—Equalization of pressure pulses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/03—Torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/12—Vibration
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
Definitions
- the present invention relates to a refrigeration apparatus including a compressor having a plurality of compression chambers and performing a refrigeration cycle.
- Patent Document 1 discloses an air conditioner having a two-cylinder compressor.
- the refrigerant circuit of this air conditioner is provided with a compressor, an indoor heat exchanger, an expansion valve, an outdoor heat exchanger, and the like.
- the compressor includes a drive motor, a drive shaft driven by the drive motor, and first and second compression mechanisms coupled to the drive shaft.
- the two compressor mechanisms are constituted by so-called rotary type compression mechanisms in which the piston rotates eccentrically in the cylinder chamber in the cylinder. That is, each compression mechanism constitutes a positive displacement fluid machine in which the volume of the refrigerant compression chamber formed in the cylinder chamber changes periodically.
- the compression operation in the compressor can be switched by switching the refrigerant flow path according to the operating conditions. Specifically, in the compressor of this air conditioner, a parallel compression operation, a cylinder deactivation operation, and a two-stage compression operation can be switched.
- the refrigerant is divided into the first compression mechanism and the second compression mechanism, and the refrigerant is single-stage compressed by each compression mechanism.
- the refrigerant is compressed only by the first compressor mechanism, while the refrigerant is not compressed by the second compression mechanism.
- the refrigerant is compressed by the first compression mechanism, and this refrigerant is further compressed by the second compression mechanism. That is, in this two-stage compression operation, the refrigerant is compressed in two stages with the first compression mechanism on the low-stage side and the second compression mechanism on the high-stage side.
- Patent Document 1 Japanese Patent Laid-Open No. 64-10066
- the compression operation of the refrigerant is performed by periodically changing the volume of the compression chamber. Specifically, in this compression operation, the volume of the compression chamber increases with the rotation of the piston, whereby the refrigerant is sucked into the compression chamber, and then the pressure of the refrigerant gradually increases as the volume of the compression chamber decreases. To rise. When the refrigerant pressure reaches the maximum pressure, the discharge valve that has closed the compression chamber is opened, and the compression chamber refrigerant is discharged.
- the volume of the compression chamber periodically changes every time the drive shaft makes one rotation, and the refrigerant pressure in the compression chamber also changes periodically with the periodic fluctuation of the volume of the compression chamber.
- the torque of the drive shaft compression torque
- the refrigerant is not compressed by the second compression mechanism, and the refrigerant compression operation is performed only by the first compression mechanism. For this reason, the compression torque of the drive shaft is affected only by the pressure of the refrigerant in the compression chamber of the first compression mechanism. Therefore, if the refrigerant pressure fluctuation in the compression chamber of the first compressor mechanism becomes large, the compression torque of the drive shaft will also fluctuate greatly.
- the first compression mechanism on the lower stage side generally has a larger refrigerant compression ratio than the second compressor mechanism on the higher stage side. For this reason, the compression torque of the drive shaft is easily affected by the refrigerant compression operation of the first compression mechanism having a large compression ratio. Therefore, also in this two-stage compression operation, if the fluctuation of the refrigerant pressure in the compression chamber of the first compression mechanism becomes large, the compression torque of the drive shaft tends to fluctuate.
- the compression torque is likely to fluctuate during the cylinder deactivation operation or the two-stage compression operation. If the compression torque fluctuates greatly in this way, the compressor vibration and noise increase.
- the present invention has been made in view of the points to be applied, and an object thereof is driving in a refrigeration apparatus including a compressor having a plurality of compression chambers during a cylinder deactivation operation or a two-stage compression operation. It is to effectively suppress fluctuations in the compression torque of the shaft.
- a refrigeration apparatus constitutes a positive displacement fluid machine having a plurality of compression chambers (61, 62, 63, 64), and each compression chamber (61, 62, 63, 64).
- the compressor main body (30) that periodically changes the volume of the compressor, and a compressor (20) having a drive shaft (23) that drives the compressor main body (30) are connected to the compressor (20).
- a refrigerant circuit (10) that performs a refrigeration cycle, and the compressor main body (30) has a phase change of volume fluctuation periods of the first compression chamber (61) and the second compression chamber (62).
- the compressor (20) is configured to be shifted by 180 ° and the phase of the fluctuation period of the volume of the third compression chamber (63) and the fourth compression chamber (64) is shifted from each other by 180 °.
- Parallel compression operation in which the refrigerant is compressed in a single stage in each of the compression chambers (61, 62, 63, 64) up to and in the third compression chamber (63) and the fourth compression chamber (64) in a single stage.
- the cooling in the first compression chamber (61) and the second compression chamber (62) is performed. This is characterized in that it is performed by switching to the cylinder deactivation operation for deactivating the compression of the medium.
- compression cycle of the compression chamber volume refers to a change cycle of the volume of the compression chamber that periodically changes when the drive shaft makes one revolution and the piston or the like revolves. It means the fluctuation cycle of the refrigerant pressure in the compression chamber that changes with the fluctuation of the volume of the refrigerant.
- the compressor main body (30) of the compressor (20) includes the first to fourth compression chambers (61, 62, 63). 64) is formed.
- the compressor (20) the refrigerant compression operation is performed by periodically changing the volume of each compression chamber (61, 62, 63, 64).
- the compressor (20) can perform the following parallel compression operation and cylinder deactivation operation.
- the refrigerant is individually compressed in the first to fourth compression chambers (61, 62, 63, 64).
- the phase of the fluctuation cycle of the volume of the first compression chamber (61) and the second compression chamber (62) is shifted by 180 ° from each other, and the third compression chamber (63) and the fourth compression chamber
- the phase of the fluctuation cycle of the volume of the chamber (64) is also shifted by 180 °.
- the phases of the fluctuation periods of the refrigerant pressure are shifted from each other by 180 °, and the third compression chamber (63) and the fourth compression chamber (64) are also mutually connected.
- the phase of the fluctuation cycle of the refrigerant pressure is shifted by 180 °. Therefore, when the drive shaft (23) rotates, the phase at which the refrigerant pressure reaches the maximum in the first compression chamber (61) and the second compression chamber (62) is also shifted by 180 °. The phase at which the refrigerant pressure becomes maximum in the three compression chambers (63) and the fourth compressor chamber (64) is also shifted by 180 °. So As a result, fluctuations in the compression torque of the drive shaft (23) during this parallel compression operation are reduced.
- the refrigerant compression operation is not performed in the first compression chamber (61) and the second compression chamber (62), and the third compression chamber (63) and the fourth compression chamber (64 ), The refrigerant is compressed.
- the phase of the fluctuation cycle of the volume of the third compression chamber (64) and the fourth compression chamber (64) is shifted by 180 ° from each other, so that the third compression chamber (63) and the fourth pressure chamber
- the phase at which the refrigerant pressure reaches the maximum in the contraction chamber (64) is also shifted by 180 °.
- the refrigeration apparatus constitutes a positive displacement fluid machine having a plurality of compression chambers (61, 62, 63, 64), and each compression chamber (61, 62, 63, 64).
- the compressor main body (30) that periodically changes the volume of the compressor, and a compressor (20) having a drive shaft (23) that drives the compressor main body (30) are connected to the compressor (20).
- a refrigerant circuit (10) that performs a refrigeration cycle, and the compressor main body (30) has a phase change of volume fluctuation periods of the first compression chamber (61) and the second compression chamber (62).
- the compressor (20) is configured to be shifted by 180 ° and the phase of the fluctuation period of the volume of the third compression chamber (63) and the fourth compression chamber (64) is shifted from each other by 180 °.
- Parallel compression operation in which the refrigerant is single-stage compressed in each of the compression chambers (61, 62, 63, 64) up to, and single-stage compression in each of the first compression chamber (61) and the second compression chamber (62).
- the refrigerant is further compressed in the third compression chamber (63) and the fourth compression chamber (64). It is characterized by switching between the two-stage compression operation.
- the compressor (20) switches between the parallel compression operation and the two-stage compression operation described above. Therefore, in the parallel compression operation, fluctuations in the compression torque can be suppressed as in the first invention.
- the refrigerant is single-stage compressed in each of the first compression chamber (61) and the second compression chamber (62).
- the refrigerant compressed in the first compression chamber (61) and the second compression chamber (62) is further compressed in the third compression chamber (63) and the fourth compression chamber (64). That is, in the two-stage compression operation of the present invention, the first compression chamber (61) and the second compression chamber (62) are on the lower stage side, and the third compression chamber (63) and the fourth compression chamber (64) are on the higher stage.
- the refrigerant is compressed in two stages.
- the phase of the fluctuation cycle of the volume of the first compression chamber (61) and the second compression chamber (62), which has a relatively large compression ratio and the pressure of the refrigerant is likely to change, is shifted by 180 °. I have to. So as a result, the phase in which the refrigerant pressure reaches the maximum in the first compression chamber (61) and the second compression chamber (62) is also shifted by 180 °, and the fluctuation of the compression torque during the two-stage compression operation is effectively reduced. .
- a refrigeration apparatus constitutes a positive displacement fluid machine having a plurality of compression chambers (61, 62, 63, 64), and each compression chamber (61, 62, 63, 64).
- the compressor main body (30) that periodically changes the volume of the compressor, and a compressor (20) having a drive shaft (23) that drives the compressor main body (30) are connected to the compressor (20).
- a refrigerant circuit (10) that performs a refrigeration cycle, and the compressor main body (30) has a phase change of volume fluctuation periods of the first compression chamber (61) and the second compression chamber (62).
- the compressor (20) is configured so that the phase of the fluctuation cycle of the volume of the third compression chamber (63) and the fourth compression chamber (64) is shifted by 180 ° from each other. 61) and the second compression chamber (62), respectively, a two-stage compression operation for further compressing the refrigerant compressed in the single stage in the third compression chamber (63) and the fourth compression chamber (64), and the third compression chamber. (63) and the fourth compression chamber (64), It is characterized in that performed at the first compression chamber (61) and the second compression chamber (62) by switching between the cylinder deactivation operation to halt compression of refrigerant within.
- the compressor (20) switches between the two-stage compression operation and the cylinder deactivation operation described above. Therefore, in the two-stage compression operation, the fluctuating force of the compression torque is reduced as in the second invention. Further, in the parallel compression operation, the variation in the compression torque is reduced as in the first invention.
- a refrigeration apparatus constitutes a positive displacement fluid machine having a plurality of compression chambers (61, 62, 63, 64), and each compression chamber (61, 62, 63, 64).
- the compressor main body (30) that periodically changes the volume of the compressor, and a compressor (20) having a drive shaft (23) that drives the compressor main body (30) are connected to the compressor (20).
- a refrigerant circuit (10) that performs a refrigeration cycle, and the compressor main body (30) has a phase change of volume fluctuation periods of the first compression chamber (61) and the second compression chamber (62).
- the compressor (20) is configured to be shifted by 180 ° and the phase of the fluctuation period of the volume of the third compression chamber (63) and the fourth compression chamber (64) is shifted from each other by 180 °.
- Parallel compression operation in which the refrigerant is compressed in a single stage in each of the compression chambers (61, 62, 63, 64) up to and in the third compression chamber (63) and the fourth compression chamber (64) in a single stage. Simultaneously with the compression, the cooling in the first compression chamber (61) and the second compression chamber (62) is performed.
- Cylinder deactivation operation that stops the compression of the medium and the first pressure Switching between the two-stage compression operation in which the refrigerant compressed in the single stage in the compression chamber (61) and the second compression chamber (62) is further compressed in the third compression chamber (63) and the fourth compression chamber (64), respectively. It is characterized by
- the compressor (20) performs switching between the parallel compression operation, the cylinder deactivation operation, and the two-stage compression operation described above. Therefore, in the parallel compression operation and the cylinder deactivation operation, the variation in the compression torque can be suppressed as in the first invention. Further, in the two-stage compression operation, the variation in the compression torque can be suppressed as in the second invention.
- the compressor body (30) of the compressor (20) includes the first compression mechanism (24) and the second compression mechanism. (25), and each compression mechanism (24, 25) is disposed in a cylinder (52, 56) forming an annular cylinder chamber (54, 58) and in the cylinder chamber (54, 58).
- the cylinder chambers (54,58) are respectively provided with annular pistons (53,57) that divide into two spaces inside and outside, and the cylinder (52,56) and piston are rotated as the drive shaft (23) rotates.
- (53, 57) are configured to relatively eccentrically rotate, and the outer space in the cylinder chamber (54) of the first compression mechanism (24) is the first compression chamber (61).
- the inner space constitutes the third compression chamber (63), while the outer space in the cylinder chamber (58) of the second compression mechanism (25) is the second compression chamber (62).
- the inner space defines the fourth compression chamber (64). It is characterized by composing!
- the compressor (20) is provided with the first compression mechanism (24) and the second compression mechanism (25).
- each compression mechanism (24, 25) an annular piston (53, 57) is disposed in an annular cylinder chamber (54, 58).
- the cylinder chamber (54, 58) is partitioned into an outer space and an inner space of the piston (53, 57), respectively, and these spaces constitute a compression chamber.
- the first compression mechanism (24) when the drive shaft (23) rotates, the cylinder (52) and the piston (53) relatively eccentrically rotate, so that the outer side of the piston (53)
- the volume of the first compression chamber (61) formed in the first and third compression chambers (63) formed inside the piston (53) changes.
- the two compression mechanisms (24, 25) as described above have the capacity of the first compression chamber (61) and the second compression chamber (62). Connected to the drive shaft (23) so that the phase of the product fluctuation cycle is 180 ° shifted from each other and the phase of the volume change cycle of the third compression chamber (63) and the fourth compression chamber (64) is also 180 ° shifted from each other. It is done. Therefore, when the compressor (20) performs the parallel compression operation, the cylinder deactivation operation, and the two-stage compression operation as described above, the fluctuation of the compression torque is reduced.
- a sixth invention is the invention according to any one of the first to fourth inventions, wherein the compressor body (30) of the compressor (20) is provided with the first to fourth compression chambers (61). , 62, 63, 64), the first to fourth rotary compression mechanisms (24, 25, 26, 27) forming the respective compression chambers (61, 62, 63, 64) are provided. Be prepared!
- the compressor (20) is provided with first to fourth compression mechanisms (24, 25, 26, 27).
- Each of these compression mechanisms (24, 25, 26, 27) is composed of a rotary compression mechanism in which a piston is housed in a cylinder chamber.
- Each compression mechanism (24, 25, 26, 27) includes First to fourth compression chambers (61, 62, 63, 64) are formed, respectively.
- the four compression mechanisms (24, 25, 26, 27) as described above have the phase of the fluctuation cycle of the volume of the first compression chamber (61) and the second compression chamber (62) shifted from each other by 180 °.
- the third compression chamber (63) and the fourth compression chamber (64) are connected to the drive shaft (23) so that the phase of the fluctuation cycle of the volume is also shifted by 180 °. Therefore, when the compressor (20) performs the parallel compression operation, the cylinder deactivation operation, and the two-stage compression operation as described above, fluctuations in the compression torque are reduced.
- the phase of the volume fluctuation cycle of the first compression chamber (61) is the third compression chamber (63) and the fourth compression chamber (64). However, it is characterized in that it is shifted by 180 ° from the phase of the fluctuation period of one of the volumes.
- the four rotary compression mechanisms (24, 25, 26, 27) are provided so that the compression chambers (61, 61, 60, 27) can cancel out the centrifugal force accompanying the eccentric rotation of the piston.
- 62,63,64) the phase of the volume fluctuation period is set. That is, in the present invention, the phase of the fluctuation cycle of the volume of the first compression chamber (61) and the third compression chamber (63) is shifted by 180 ° and at the same time the second compression chamber (62) and the fourth compression chamber (64).
- the phase of the volume fluctuation cycle is shifted 180 °, or the phase of the volume fluctuation cycle of the first compression chamber (61) and the fourth compression chamber (64) is shifted 180 ° and at the same time the second compression chamber (62) and The phase of the volume fluctuation cycle of the third compression chamber (63) is shifted by 180 °.
- the two pistons of the four compression mechanisms 24, 25, 26, 27
- the remaining two pistons are also driven
- the relationship is shifted by 180 ° around (23). Therefore, in this compressor (20), the centrifugal forces of the pistons that rotate eccentrically as a pair cancel each other, so the torque fluctuation of the drive shaft (23) is reduced.
- four compression chambers are provided in the compressor body (30) of the compressor (20), and the first compression chamber (61) and the second compression chamber (30) are provided.
- the phase of the volume fluctuation cycle of the compression chamber (62) is shifted 180 ° to each other, and the phase of the volume fluctuation cycle of the third compression chamber (63) and the fourth compression chamber (64) is also shifted 180 ° to each other. I have to.
- the cycle of the pressure fluctuation of the refrigerant in the third compression chamber (63) and the fourth compression chamber (63) is shifted by 180 °, so that the variation in the compression torque during the cylinder deactivation operation is small. Become. Therefore, it is possible to reduce the vibration and noise of the compressor (20) during the cylinder deactivation operation.
- the cycle of the pressure fluctuation of the refrigerant in the first compression chamber (61) and the second compression chamber (62) having a relatively large compression ratio is shifted by 180 °.
- the compression torque during the compression operation can be effectively reduced.
- the cycle of the pressure fluctuation of the refrigerant in the first compression chamber (61) and the third compression chamber (63) is shifted by 180 °, and the third compression chamber (63) and the fourth compression chamber.
- the cycle of the pressure fluctuation of the refrigerant in (64) is also shifted by 180 °. Therefore, the compression torque at the time of this parallel compression operation can be reduced.
- the torque can be reduced.
- the space outside the piston (53, 57) in the cylinder chamber (54, 58) is defined as the first compression chamber (61) and the second compression chamber (62).
- the space outside the piston (53, 57) is larger in volume than the space inside the piston (53, 57) by the larger radius of curvature. Therefore, it is possible to increase the displacement volume of the first compression chamber (61) and the second compression chamber (62), which are on the lower stage side during the two-stage compression operation, and to effectively compress the refrigerant in two stages.
- the compressor (20) of the type in which one compression chamber is formed in each of the four compression mechanisms (24, 25, 26, 27) is as described above. Thus, the compression torque in each compression operation can be reduced.
- the mechanical force of the drive shaft (23) is obtained by canceling out the centrifugal force of each of the two pistons in the four compression mechanisms (24, 25, 26, 27). Torque fluctuations can be reduced. Therefore, according to the present invention, vibration and noise of the compressor (20) can be further effectively reduced.
- FIG. 1 is a piping system diagram of a refrigerant circuit of an air conditioner according to Embodiment 1.
- FIG. 2 is a longitudinal sectional view of the compressor.
- FIG. 3 is a cross-sectional view of the first compression mechanism (second compression mechanism).
- FIG. 4 is a piping diagram illustrating a parallel compression operation during heating operation.
- FIG. 5 is a piping diagram illustrating cylinder deactivation operation during heating operation.
- FIG. 6 is a piping diagram illustrating a two-stage compression operation during heating operation.
- FIG. 7 is a piping diagram illustrating a parallel compression operation during cooling operation.
- FIG. 8 is a graph showing the relationship between the compression torque and the rotation angle of the drive shaft.
- FIG. 9 is a piping system diagram of a refrigerant circuit of an air conditioner according to Embodiment 2.
- FIG. 10 is a cross-sectional view of the first compression mechanism.
- FIG. 11 is a piping diagram illustrating a parallel compression operation during heating operation.
- FIG. 12 is a piping diagram illustrating a two-stage compression operation during heating operation.
- FIG. 13 is a piping diagram illustrating a two-stage compression operation during heating operation.
- the refrigeration apparatus constitutes an air conditioner (1) that performs switching between indoor heating and cooling.
- the air conditioner (1) includes a refrigerant circuit (10) that performs a refrigeration cycle by circulating the refrigerant, and constitutes a so-called heat pump type air conditioner.
- the refrigerant circuit (10) includes, as main components, a compressor (20), an indoor heat exchanger (11), an expansion valve (12), and an outdoor heat exchanger ( 13) is provided.
- the indoor heat exchange (11) is provided in the indoor unit. This indoor heat exchange (11) exchanges heat between the indoor air blown by the indoor fan and the refrigerant.
- the outdoor heat exchanger (13) is provided in the outdoor unit. The outdoor heat exchanger (13) exchanges heat between the outdoor air blown by the outdoor fan and the refrigerant.
- the expansion valve (12) is provided between the indoor heat exchanger (11) and the outdoor heat exchanger (13) in the refrigerant circuit (10). This expansion valve (12) is composed of an electronic expansion valve whose opening degree is adjustable.
- the refrigerant circuit (10) includes a four-way switching valve (14), an internal heat exchanger (15), a pressure reducing valve (16), and a receiver.
- a liquid vessel (17) is also provided.
- the four-way selector valve (14) includes first to fourth ports.
- the four-way selector valve (14) has a first port connected to the discharge side of the compressor (20), a second port connected to the indoor heat exchanger (11), and a third port connected to the liquid receiver. It is connected to the suction side of the compressor (20) via the compressor (17), and its fourth port is connected to the outdoor heat exchanger (13).
- This four-way selector valve (14) has a state in which the first port and the second port communicate with each other and the third port and the fourth port communicate with each other, and the first port and the fourth port communicate with each other. It is possible to switch to the state where 3 ports communicate.
- the internal heat exchanger (15) constitutes a double-tube heat exchanger having a first heat exchange channel (15a) and a second heat exchange channel (15b).
- the first heat exchange channel (15a) is disposed so as to straddle the refrigerant pipe between the indoor heat exchanger (11) and the expansion valve (12).
- the second heat exchange channel (15b) is disposed so as to straddle the intermediate index pipe (18) branched from between the internal heat exchanger (15) and the expansion valve (12).
- the intermediate injection pipe (18) is provided with the pressure reducing valve (16) on the upstream side of the internal heat exchanger (15).
- the high-pressure liquid refrigerant flowing through the first heat exchange channel (15a) and the intermediate pressure refrigerant flowing through the second heat exchange channel (15b) can exchange heat. /!
- the refrigerant circuit (10) is provided with first to fourth bypass pipes (36, 37, 38, 39) and a three-way valve (41) having three ports.
- One end of the first bypass pipe (36) is connected to the first suction pipe (32a) and the second suction pipe (32b) of the compressor (20), and the other end is the first of the three-way valve (41). Connected to 1 port.
- the second bypass pipe (37) has one end connected to the second port of the three-way valve (41) and the other end connected to the first suction communication pipe (34a) and the second suction communication pipe (34b) of the compressor (20). ).
- the outflow end of the intermediate injection pipe (18) described above is connected to the third port of the three-way valve (41).
- the three-way valve (41) has a state in which the first port and the second port communicate with each other and the third port closes simultaneously, and a state in which the second port and the third port communicate with each other simultaneously with the first port closed. It is possible to switch to.
- the third bypass pipe (38) has one end connected to the first discharge communication pipe (33a) and the second discharge communication pipe (33b) of the compressor (20), and the other end connected to the compressor (20).
- the first suction communication pipe (34a) and second suction pipe Connected to the incoming communication pipe (34b).
- the third bypass pipe (38) is provided with an electromagnetic on-off valve (42) for opening and closing the refrigerant flow path.
- One end of the fourth bypass pipe (39) is connected to the first discharge communication pipe (33a) and the second discharge communication pipe (33b) of the compressor (20), and the other end is connected to the compressor (20).
- the fourth bypass pipe (39) has a check valve (43) that prohibits the flow of refrigerant from the branch communication pipe (35) side to the discharge communication pipe (33a, 33b) side and allows the reverse flow. ) Is provided.
- the compressor (20) includes an electric motor (22), a drive shaft (23), and two compression mechanisms (24, 25) in a sealed casing (21).
- the compressor main body (30) is housed.
- the compressor (20) is a so-called high-pressure dome type compressor in which the inside of the casing (21) is filled with a high-pressure refrigerant.
- the electric motor (22) is disposed on an upper portion of the casing (21). Inside the electric motor (22), the drive shaft (23) penetrates vertically. The drive shaft (23) is rotated by being driven by the electric motor (22).
- the drive shaft (23) is formed with a first eccentric portion (23a) located near the lower portion and a second eccentric portion (23b) located near the central portion.
- the first eccentric part (23a) and the second eccentric part (23b) are each eccentric from the axis of the drive shaft (23).
- the first eccentric part (23a) and the second eccentric part (23b) are 180 ° out of phase with each other about the axis of the drive shaft (23).
- the compressor body (30) is provided below the drive shaft (23).
- the compressor body (30) includes a first compression mechanism (24) near the bottom of the casing (21) and a second compression mechanism (25) near the electric motor (22).
- the rotational speed of the drive shaft (23) is variable by inverter control.
- both compression mechanisms (24, 25) form an inverter type compression mechanism with variable capacity!
- the first compression mechanism (24) includes a first housing (51) fixed to the casing (21), and a first cylinder (52) accommodated in the first saw and the winging (51). I have.
- An annular first piston (53) projecting upward is provided inside the first housing (51).
- the first cylinder (52) includes a disc-shaped end plate portion (52a), an annular inner cylinder portion (52b) projecting downward from an inner peripheral end portion of the end plate portion (52a), and the end plate And an annular outer cylinder portion (52c) protruding downward from the outer peripheral end of the portion (52a).
- the first eccentric part (23a) is fitted in the da part (52b).
- the first cylinder (52) is configured to rotate eccentrically about the axis of the first eccentric portion (23a) as the drive shaft (23) rotates.
- the first cylinder (52) has an annular first cylinder chamber (54) formed between the outer peripheral surface of the inner cylinder portion (52b) and the inner peripheral surface of the outer cylinder portion (52c).
- the first piston (53) is disposed in the first cylinder chamber (54).
- the first cylinder chamber (54) has a first compression chamber (61) formed between the outer peripheral surface of the first piston (53) and the inner wall outside the first cylinder chamber (54), It is partitioned into a third compression chamber (63) formed between the inner peripheral surface of the first piston (53) and the inner wall inside the first cylinder chamber (54).
- the first cylinder (52) has an outer cylinder portion (52c) that communicates the space outside the first cylinder (52) with the first compression chamber (61). Is formed.
- the blade (45) extends from the inner peripheral surface of the outer cylinder portion (52c) to the outer peripheral surface of the inner cylinder portion (52b). /!
- the blade (45) divides the first compression chamber (61) and the third compression chamber (63) into a low pressure chamber on the suction side and a high pressure chamber on the discharge side.
- the first piston (53) has a C shape in which a part of the annular shape is divided, and the blade (45) is inserted through the divided portion.
- a semi-circular bush (46, 46) is fitted to the part of the piston (53) so as to sandwich the blade (45)!
- the bushes (46, 46) are configured to be swingable at the end of the piston (53).
- the cylinder (52) can move forward and backward in the extending direction of the blade (45), and can swing together with the bushes (46, 46).
- the drive shaft (23) rotates
- the cylinder (52) rotates eccentrically in the order of (A) force (D) in Fig. 3, and the refrigerant is compressed in the first compression chamber (61) and the third compression chamber (63). Is done.
- the first compression chamber (61) and the third compression chamber (63) are displaced so as to be 180 ° out of phase with each other around the axis of the drive shaft (23).
- the second compression mechanism (25) is configured by the same mechanical elements as the first compression mechanism (24) so as to be turned upside down with respect to the first compression mechanism (24).
- the second compression mechanism (25) includes a second housing (55) fixed to the casing (21) and a second cylinder (56) housed in the second housing (55). I have.
- An annular second piston (57) protruding downward is provided inside the second housing (55).
- the second cylinder (56) is a disc-shaped end plate Part (56a), inner peripheral end force of the end plate part (56a), an annular inner cylinder part (56b) protruding upward, and an annular end part protruding upward from the outer end of the end plate part (56a) And an outer cylinder part (56c).
- the second cylinder (56) is configured to rotate eccentrically about the axis of the second eccentric portion (23b) as the drive shaft (23) rotates.
- the second cylinder (56) has an annular second cylinder chamber (58) formed between the outer peripheral surface of the inner cylinder portion (56b) and the inner peripheral surface of the outer cylinder portion (56c).
- the second piston (57) is disposed in the second cylinder chamber (58).
- the second cylinder chamber (58) has a second compression chamber (62) formed between the outer peripheral surface of the second piston (57) and the outer inner wall of the second cylinder chamber (58), It is partitioned into a fourth compression chamber (64) formed between the inner peripheral surface of the second piston (57) and the inner wall inside the second cylinder chamber (58).
- the second cylinder (56) has an outer cylinder portion (56c) that communicates with the space outside the second cylinder (56) and the third compression chamber (63). Is formed!
- the first suction pipe (32a), the first discharge communication pipe (33a), and the first suction communication pipe (34a) are connected to the first compression mechanism (24).
- the first suction pipe (32a) is connected to the suction side of the first compression chamber (61) via the first communication passage (59).
- the first discharge communication pipe (33a) is connected to the discharge side of the first compression chamber (61).
- the first discharge communication pipe (33a) is provided with a first discharge valve (65).
- the first discharge valve (65) is configured to open when the differential pressure between the refrigerant pressure on the discharge side of the first compression chamber (61) and the pressure on the first discharge communication pipe (33a) exceeds a predetermined pressure. It is made.
- the first compression mechanism (24) is provided with a discharge port (66) for communicating the discharge side of the third compression chamber (63) with the internal space of the casing (21).
- the discharge port (66) is provided with a second discharge valve (67).
- the second discharge valve (67) is configured to be opened when the differential pressure between the refrigerant pressure on the discharge side of the third compression chamber (63) and the internal pressure of the casing (21) exceeds a predetermined pressure. .
- the second compression mechanism (25) includes the above-described second suction pipe (32b), second discharge communication pipe (33b), and And the second suction communication pipe (34b) is connected.
- the second suction pipe (32b) is connected to the suction side of the second compression chamber (62) via the second communication path (60).
- the second discharge communication pipe (33b) is connected to the discharge side of the second compression chamber (62).
- the second discharge connecting pipe (33b) has a third discharge valve.
- the third discharge valve (68) opens so that the differential pressure between the refrigerant pressure on the discharge side of the second compression chamber (62) and the pressure on the second discharge communication pipe (33b) becomes a predetermined pressure or more. It is configured.
- the second compression mechanism (25) is provided with a discharge port (69) for communicating the discharge side of the fourth compression chamber (64) with the internal space of the casing (21). This discharge port
- the fourth discharge valve (70) is configured to open when the differential pressure between the refrigerant pressure on the discharge side of the fourth compression chamber (64) and the internal pressure of the casing (21) exceeds a predetermined pressure.
- a discharge pipe (31) is connected to the top of the casing (21) of the compressor (20), and a branch connecting pipe (35) is connected to the trunk of the casing (21). One end of each of the discharge pipe (31) and the branch connection pipe (35) faces the internal space of the casing (21).
- each cylinder (52, 56) of each compression mechanism (24, 25) is moved to each piston (53, 57) as the drive shaft (23) rotates.
- the eccentric rotational movement is performed relative to.
- the volume of each compression chamber (61, 63) of the first compression mechanism (24) changes periodically
- the volume of each compression chamber (62, 64) of the second compression mechanism (25) also changes periodically.
- the rotation angle at which the first compression chamber (61) force discharges the refrigerant and the third compression chamber (63) force The rotation angle is different by 180 °. That is, in the first compression mechanism (24), the phase of the volume fluctuation cycle of the first compression chamber (61) and the volume fluctuation cycle of the third compression chamber (63) are shifted by 180 °.
- the rotation angle at which the refrigerant is discharged from the second compression chamber (62) and the fourth compression chamber (64) force the refrigerant
- the rotation angle is different by 180 °. That is, in the second compression mechanism (25), the phase of the volume fluctuation cycle of the second compression chamber (62) and the volume fluctuation cycle of the fourth compression chamber (64) are shifted by 180 °.
- the phases of the fluctuation periods of the volumes of the first compression chamber (61) and the second compression chamber (62) are shifted from each other by 180 °, and the third compression chamber (61)
- the phase of the fluctuation cycle of the volume of the chamber (63) and the fourth compression chamber (64) is also shifted by 180 ° from each other!
- the four-way switching valve (14) is set to the state shown in FIGS. 4 to 6, and the opening degree of the expansion valve (12) is appropriately adjusted. Further, in this heating operation, the settings of the three-way valve (41) and the electromagnetic on-off valve (42) are switched, so that the parallel compression operation by the compressor (20), the cylinder deactivation operation, and the two-stage compression operation are performed. Switching is possible.
- the compressor (20) performs a parallel compression operation.
- the three-way valve (41) is in the state shown in FIG. 4, and the electromagnetic on-off valve (42) of the third bypass pipe (38) is closed.
- the opening of the pressure reducing valve (16) is closed.
- the refrigerant discharged from the discharge pipe (31) of the compressor (20) flows through the indoor heat exchanger (11) via the four-way switching valve (14).
- the indoor heat exchanger (11) the refrigerant dissipates heat to the indoor air and condenses. As a result, the room is heated.
- the refrigerant condensed in the indoor heat exchanger (11) flows through the first heat exchange channel (15a) of the internal heat exchanger (15) as it is and is decompressed to a low pressure by the expansion valve (12). After that, it flows through the outdoor heat exchanger (13). In the outdoor heat exchanger (13), the refrigerant absorbs heat from the outdoor air and evaporates. The refrigerant evaporated in the outdoor heat exchanger (13) is sent to the suction side of the compressor (20) via the liquid receiver (17).
- the refrigerant flowing to the suction side of the compressor (20) is divided into the first suction pipe (32a), the second suction pipe (32b), and the first bypass pipe (36).
- the refrigerant flowing through the first suction pipe (32a) is compressed in the first compression chamber (61) of the first compression mechanism (24), and then from the first discharge communication pipe (33a) to the first compression chamber (61 ) Is discharged to the outside.
- This refrigerant is sent to the internal space of the casing (21) via the fourth bypass pipe (39).
- the refrigerant flowing through the second suction pipe (32b) is compressed in the second compression chamber (62) of the second compression mechanism (25), and then from the second discharge communication pipe (33b) to the second compression chamber (62 ) To the outside.
- This refrigerant is sent to the internal space of the casing (21) via the fourth bypass pipe (39).
- the refrigerant flowing through the first bypass pipe (36) passes through the second bypass pipe (37).
- the flow is divided into the first suction communication pipe (34a) and the second suction communication pipe (34b).
- the refrigerant flowing through the first suction communication pipe (34a) is compressed in the third compression chamber (63) and then discharged from the discharge port (66) to the internal space of the casing (21).
- the refrigerant flowing through the second suction communication pipe (34b) is compressed in the fourth compression chamber (64) and then discharged from the discharge port (69) to the internal space of the casing (21).
- the low-pressure refrigerant is single-stage compressed in the first to fourth compression chambers (61, 62, 63, 64) to become a high-pressure refrigerant.
- This high-pressure refrigerant is discharged from the discharge pipe (31) to the outside of the casing (21) again.
- the compressor (20) performs the cylinder deactivation operation.
- the three-way valve (41) is in the state shown in FIG. 5, and the electromagnetic on-off valve (42) of the third bypass pipe (38) is in the open state.
- the pressure reducing valve (16) is closed.
- the refrigerant discharged from the discharge pipe (31) of the compressor (20) flows through the indoor heat exchanger (11) via the four-way switching valve (14).
- the indoor heat exchanger (11) the refrigerant dissipates heat to the indoor air and condenses. As a result, the room is heated.
- the refrigerant condensed in the indoor heat exchanger (11) flows through the first heat exchange channel (15a) of the internal heat exchanger (15) as it is, and is decompressed to a low pressure by the expansion valve (12). After that, it flows through the outdoor heat exchanger (13). In the outdoor heat exchanger (13), the refrigerant absorbs heat from the outdoor air and evaporates. The refrigerant evaporated in the outdoor heat exchanger (13) is sent to the suction side of the compressor (20) via the liquid receiver (17).
- the refrigerant that has flowed to the suction side of the compressor (20) is divided into the first suction pipe (32a), the second suction pipe (32b), and the first bypass pipe (36).
- the refrigerant flowing through the first suction pipe (32a) is sucked into the first compression chamber (61) of the first compression mechanism (24), while the refrigerant flowing through the second suction pipe (32b)
- the air is sucked into the second compression chamber (62) of the compression mechanism (25).
- the suction side and the discharge side of the first compression chamber (61) are connected to the first bypass pipe (36), the second bypass pipe (37), the third bypass pipe (38), and It communicates via the first discharge communication pipe (33a).
- the suction side and the discharge side of the second compression chamber (62) are the first bypass pipe (36), the second bypass pipe (37), the third bypass pipe (38), and the second discharge communication pipe (33b). ) To communicate.
- the first The pressure on the suction side and the pressure on the discharge side of the compression chamber (61) are equalized, and the pressure on the suction side and the pressure on the discharge side of the second compression chamber (62) are also equalized.
- the first discharge valve (65) is always open, and the pressure on the discharge side is small in the second compression chamber (62).
- the third discharge valve (68) is always open.
- the refrigerant passes through the opened first discharge valve (65) without being compressed and flows out to the first discharge communication pipe (33a).
- the refrigerant passes through the open third discharge valve (68) without being compressed and flows out to the second discharge communication pipe (33b). That is, in the first compression chamber (61) and the second compression chamber (62) during the cylinder deactivation operation, refrigerant compression work is not performed, and the refrigerant passes through each compression chamber (61, 63) as it is. Will do.
- the refrigerant flowing through the first suction communication pipe (34a) is compressed in the third compression chamber (63) and then discharged from the discharge port (66) to the internal space of the casing (21).
- the refrigerant flowing through the second suction communication pipe (34b) is compressed in the fourth compression chamber (64) and then discharged from the discharge port (69) to the internal space of the casing (21).
- the refrigerant compression operation in the first compression chamber (61) and the second compression chamber (62) is suspended, and at the same time, the third compression chamber (63) and In the fourth compression chamber (64), the low-pressure refrigerant is compressed in a single stage to become high-pressure refrigerant.
- the high-pressure refrigerant is again discharged from the casing (21) through the discharge pipe (31).
- the compressor (20) performs a two-stage compression operation.
- the three-way valve (41) is in the state shown in FIG. 6, and the electromagnetic switching valve (42) of the third bypass pipe (38) is in the open state.
- the opening of the pressure reducing valve (16) is adjusted as appropriate.
- the refrigerant discharged from the discharge pipe (31) of the compressor (20) flows through the indoor heat exchanger (11) via the four-way switching valve (14).
- the indoor heat exchanger (11) the refrigerant dissipates heat to the indoor air and condenses. As a result, the room is heated.
- the refrigerant condensed in the indoor heat exchanger (11) passes through the first heat exchange channel (1 Flow 5a).
- the refrigerant that is diverted to the intermediate injection pipe (18) and depressurized to the intermediate pressure by the pressure reducing valve (16) flows through the second heat exchange channel (15b). It has become. That is, in the internal heat exchange (15), a high-pressure refrigerant flows through the first heat exchange flow path (15a), and an intermediate-pressure refrigerant flows through the second heat exchange flow path (15b).
- the remaining refrigerant that does not flow to the intermediate injection pipe (18) side is reduced to a low pressure by the expansion valve (12), and then flows through the outdoor heat exchanger (13).
- the refrigerant also absorbs the outdoor aerodynamic force and evaporates.
- the refrigerant evaporated in the outdoor heat exchange (13) is sent to the suction side of the compressor (20) via the liquid receiver (17).
- the refrigerant sent to the suction side of the compressor (20) is divided into the first suction pipe (32a) and the second suction pipe (32b).
- the refrigerant flowing through the first suction pipe (32a) is compressed in the first compression chamber (61) of the first compression mechanism (24), and then from the first discharge communication pipe (33a) to the first compression chamber (61). Discharged to the outside.
- the refrigerant flowing through the second suction pipe (32b) is compressed in the second compression chamber (62) of the second compression mechanism (25), and then from the second discharge communication pipe (33b) to the second compression chamber (62 ) Is discharged to the outside.
- the refrigerant discharged from each discharge connection pipe (33a, 33b) joins in the third bypass pipe (38).
- the refrigerant evaporated in the internal heat exchanger (15) flows through the intermediate injection pipe (18). Therefore, the refrigerant flows through the three-way valve (41) and the second bypass pipe (37), and then merges with the refrigerant flowing through the third bypass pipe (38). As described above, in this two-stage compression operation, the intermediate-pressure refrigerant is mixed with the refrigerant compressed in the first compression chamber (61) and the second compression chamber (62) through the intermediate injection pipe (18). By doing so, reduce the discharge refrigerant temperature of the first compression mechanism (24)! / Speak.
- the combined refrigerant is divided into the first suction communication pipe (34a) and the second suction communication pipe (34b).
- the refrigerant flowing through the first suction communication pipe (34a) is further compressed in the third compression chamber (63) and then discharged from the discharge port (66) to the internal space of the casing (21).
- the refrigerant flowing through the second suction communication pipe (34b) is further compressed in the fourth compression chamber (64) and then discharged from the discharge port (69) to the internal space of the casing (21).
- the refrigerant compressed to the intermediate pressure in the first compression chamber (61) and the second compression chamber (62) is converted into the third compression chamber (63) and the second compression chamber (63).
- 4High-pressure refrigerant further compressed in the compression chamber (64). This high-pressure refrigerant is discharged from the discharge pipe (31) to the outside of the casing (21) again.
- Discharge pipe (31) force of compressor (20) The discharged high-pressure refrigerant flows through the outdoor heat exchanger (13) via the four-way switching valve (14).
- the outdoor heat exchanger (13) the refrigerant dissipates heat to the outdoor air and condenses.
- the refrigerant condensed in the outdoor heat exchanger (13) is depressurized by the expansion valve (12) and then flows through the indoor heat exchanger (11).
- the indoor heat exchanger (11) the refrigerant absorbs heat from the indoor air and evaporates. As a result, the room is cooled.
- the refrigerant evaporated in the indoor heat exchanger (11) is sent to the suction side of the compressor (20) via the liquid receiver (17).
- a parallel compression operation is performed in the same manner as described above. That is, the refrigerant sucked into the compressor (20) is single-stage compressed in each compression chamber (61, 62, 63, 64). The refrigerant compressed in each compression chamber (61, 62, 63, 64) is discharged again from the discharge pipe (31) from the internal space of the casing (21).
- the third compression chamber (63) and the fourth compression chamber ( 64) compresses the refrigerant.
- the phase at which the refrigerant pressure is maximum in the third compression chamber (63) the phase at which the refrigerant pressure is maximum in the fourth compression chamber (64), and the force S180 ° It will shift.
- the fluctuation range of the compression torque when the drive shaft (23) rotates is smoothed. Therefore, the compression torque during the cylinder deactivation operation is smaller than that of a two-cylinder compressor.
- the refrigerant is compressed in two sets of compression chambers (61, 62, 63, 64) that are 180 ° different in phase of the volume fluctuation period. Is done. For this reason, when the drive shaft (23) rotates, the phase at which the refrigerant pressure reaches the maximum in the first compression chamber (61) and the second compression chamber (62) is shifted by 180 °, and the third compression chamber (23) The phase at which the refrigerant pressure reaches the maximum in the chamber (63) and the fourth compression chamber (64) is also shifted by 180 °. As a result, the pressure of the drive shaft (23) The compression torque is smoothed, and the fluctuation of the compression torque during this parallel compression operation is smaller than that of the two-cylinder compressor.
- the first compression mechanism (24) having the two compression chambers (61, 63), the second compression mechanism (25) having the two compression chambers (62, 64), and In the compressor (20) provided with the first compression chamber (61) and the second compression chamber (62), the third variable compression chamber (63) and the third compression chamber (63) And the phase of the fluctuation cycle of the volume of the fourth compression chamber (64) are also shifted from each other by 180 °.
- the phases of the fluctuation periods of the refrigerant pressure in the third compression chamber (63) and the fourth compression chamber (63) can be shifted by 180 ° from each other. It is possible to reduce the fluctuation of the compression torque. Therefore, the compression torque can be effectively reduced in the cylinder deactivation operation that is likely to increase vibration and noise, and the compressor (20) can be reduced in vibration and noise.
- the phases of the fluctuation periods of the refrigerant pressure in the first compression chamber (61) and the second compression chamber (62) on the lower stage side are mutually equal. It can be shifted by 180 °, and the compression torque during the two-stage compression operation can be effectively reduced.
- each of the cylinders (52, 56) having the annular cylinder chamber (54, 58) has an annular piston (53, 57).
- each annular piston (53,57) is connected to the drive shaft (23) via a mirror plate or the like, while each cylinder (52,56) is fixed to a housing or the like, and each piston (53,57) ) May be eccentrically rotated with respect to each cylinder (52, 56).
- the space outside the piston (53, 57) is defined as the first compression chamber (61) and the second compression chamber (62), and the space inside the piston (53, 57) is defined as the space inside the piston (53, 57).
- the space inside the piston (53, 57) is defined as the first compression chamber (61) and the second compression chamber (62), and the space outside the piston (53, 57) is The third compression chamber (63) and the fourth compression chamber (64) may be used.
- the air conditioner (1) of the second embodiment is different from the first embodiment in the configuration of the compressor (20).
- the compressor body (30) of the compressor (20) of Embodiment 2 includes the first to fourth compression mechanisms (24, 25, 26, 27)! / The
- the drive shaft (23) has a first compression mechanism (24), a third compression mechanism (26), a second compression mechanism (25), and a fourth compression in order from the lower end side upward.
- a mechanism (27) is provided. As shown in FIG. 10, each compression mechanism (24, 25, 26, 27) constitutes a rotary compression mechanism of a swing piston type.
- the first piston (71) is housed in the cylinder chamber.
- the first compression mechanism (24) is formed with a first compression chamber (61) whose volume is periodically changed by the eccentric rotation of the first piston (71).
- the second piston (72) is accommodated in the cylinder chamber.
- the second compression mechanism (25) is formed with a second compression chamber (62) whose volume is periodically changed by the eccentric rotation of the second piston (72).
- the third piston (73) is housed in the cylinder chamber.
- the third compression mechanism (26) is formed with a third compression chamber (63) whose volume is periodically changed by the eccentric rotation of the third piston (73).
- the fourth piston (74) is housed in the cylinder chamber.
- the fourth compression mechanism (27) is formed with a fourth compression chamber (64) whose volume periodically changes due to the eccentric rotation of the fourth piston (74).
- the first suction pipe (32a) is connected to the suction side of the first compression chamber (61), and the second suction pipe (32b) is connected to the suction side of the second compression chamber (62).
- the first discharge communication pipe (33a) is connected to the discharge side of the first compression chamber (61), and the second discharge communication pipe (33b) is connected to the discharge side of the second compression chamber (62). ing.
- the first discharge communication pipe (33a) and the second discharge communication pipe (33b) are each provided with a discharge valve (not shown).
- the first suction communication pipe (34a) is connected to the suction side of the third compression chamber (63), and the second suction communication pipe (34b) is connected to the suction side of the fourth compression chamber (64). Yes.
- the third compression chamber (63) and the second compression chamber On the discharge side of the four compression chambers (64), a discharge port connected to the internal space of the casing (21) and a discharge valve for opening and closing each discharge port are provided (not shown).
- the third piston (73) and the fourth piston (74) are shifted from each other by 180 ° around the drive shaft (23). That is, in the compressor (20), the phase of the fluctuation cycle of the volume of the first compression chamber (61) and the second compression chamber (62) is shifted by 180 °, and the third compression chamber (63) and the fourth compression chamber The phase of the volume fluctuation cycle of (64) is 180 ° out of phase.
- the phases of the first piston (71) and the third piston (73) are shifted from each other by 180 ° about the drive shaft (23), and the second piston (72) And the fourth piston (74) are 180 ° out of phase with each other about the drive shaft (23). That is, in the compressor (20), the phase of the fluctuation cycle of the volume of the first compression chamber (61) and the third compression chamber (63) is also shifted by 180 °, and the second compression chamber (62) and the fourth compression chamber (62) The phase of the fluctuation cycle of the volume of the compression chamber (64) is also shifted by 180 °.
- the operation of the air conditioner (1) according to the second embodiment will be described.
- the heating operation and the cooling operation can be switched as in the first embodiment, but only the heating operation of the air conditioner (1) will be described below.
- the four-way selector valve (14) is set to the state shown in Figs. 11 to 13 and the opening degree of the expansion valve (12) is appropriately adjusted.
- the setting of the three-way valve (41) and the electromagnetic on-off valve (42) is switched, so that the parallel compression operation by the compressor (20) can be performed.
- the cylinder deactivation operation and the two-stage compression operation can be switched.
- the three-way valve (41) is in the state shown in FIG. 11, and the electromagnetic on-off valve (42) of the third bypass pipe (38) is closed.
- the opening of the pressure reducing valve (16) is closed.
- the refrigerant discharged from the compressor (20) flows through the indoor heat exchanger (11) and the outdoor heat exchanger (13) and is sent to the suction side of the compressor (20), as in the parallel compression operation of the first embodiment. It is. [0112]
- the refrigerant flowing to the suction side of the compressor (20) is divided into the first suction pipe (32a), the second suction pipe (32b), and the first bypass pipe (36).
- the refrigerant flowing through the first suction pipe (32a) is compressed in the first compression chamber (61) of the first compression mechanism (24), and then from the first discharge communication pipe (33a) to the first compression chamber (61 ) Is discharged to the outside.
- This refrigerant is sent to the internal space of the casing (21) via the fourth bypass pipe (39).
- the refrigerant flowing through the second suction pipe (32b) is compressed in the second compression chamber (62) of the second compression mechanism (25), and then from the second discharge communication pipe (33b) to the second compression chamber (62 ) To the outside.
- This refrigerant is sent to the internal space of the casing (21) via the fourth bypass pipe (39).
- the refrigerant flowing through the first bypass pipe (36) is divided into the first suction communication pipe (34a) and the second suction communication pipe (34b) via the second bypass pipe (37).
- the refrigerant flowing through the first suction communication pipe (34a) is compressed in the third compression chamber (63) of the third compression mechanism (26) and then discharged from the discharge port to the internal space of the casing (21).
- the refrigerant flowing through the second suction communication pipe (34b) is compressed in the fourth compression chamber (64) of the fourth compression mechanism (27) and then discharged from the discharge port to the internal space of the casing (21). .
- the three-way valve (41) is in the state shown in FIG. 12, and the electromagnetic on-off valve (42) of the third bypass pipe (38) is in the open state.
- the pressure reducing valve (16) is closed.
- the refrigerant discharged from the compressor (20) flows through the indoor heat exchanger (11) and the outdoor heat exchanger (13) and is sent to the suction side of the compressor (20) in the same manner as in the cylinder deactivation operation of the first embodiment. It is possible.
- the refrigerant flowing to the suction side of the compressor (20) is divided into the first suction pipe (32a), the second suction pipe (32b), and the first bypass pipe (36).
- the refrigerant flowing through the first suction pipe (32a) is sucked into the first compression chamber (61) of the first compression mechanism (24), while the refrigerant flowing through the second suction pipe (32b)
- the air is sucked into the second compression chamber (62) of the compression mechanism (25).
- the suction side and discharge side of the first compression chamber (61) and the suction side and discharge side of the second compression chamber (62) communicate with each other. It becomes. Therefore, the discharge valves provided in the first discharge communication pipe (33a) and the second discharge communication pipe (33b) are always open, respectively, and in the first compression chamber (61) and the second compression chamber (62), respectively.
- the refrigerant is not compressed.
- the refrigerant flowing through the first suction communication pipe (34a) is compressed in the third compression chamber (63) of the third compression mechanism (26) and then discharged from the discharge port to the internal space of the casing (21). .
- the refrigerant flowing through the second suction communication pipe (34b) is compressed in the fourth compression chamber (64) of the fourth compression mechanism (27) and then discharged from the discharge port to the internal space of the casing (21).
- the three-way valve (41) is in the state shown in FIG. 13, and the electromagnetic on-off valve (42) of the third bypass pipe (38) is in the open state.
- the opening of the pressure reducing valve (16) is adjusted as appropriate.
- the refrigerant discharged from the compressor (20) flows through the indoor heat exchanger (11) and the outdoor heat exchanger (13) in the same manner as in the two-stage compression operation of the first embodiment, to the suction side of the compressor (20). Sent.
- the refrigerant sent to the suction side of the compressor (20) is divided into the first suction pipe (32a) and the second suction pipe (32b).
- the refrigerant flowing through the first suction pipe (32a) is compressed in the first compression chamber (61) of the first compression mechanism (24), and then from the first discharge communication pipe (33a) to the first compression chamber (61). Discharged to the outside.
- the refrigerant flowing through the second suction pipe (32b) is compressed in the second compression chamber (62) of the second compression mechanism (25), and then from the second discharge communication pipe (33b) to the second compression chamber (62 ) Is discharged to the outside.
- the refrigerant discharged from each discharge connection pipe (33a, 33b) joins in the third bypass pipe (38).
- the refrigerant is mixed with an intermediate pressure refrigerant having an intermediate injection pipe (18) force.
- the merged refrigerant is divided into the first suction communication pipe (34a) and the second suction communication pipe (34b).
- the refrigerant flowing through the first suction communication pipe (34a) is further compressed in the third compression chamber (63) of the third compression mechanism (26), and then from the discharge port (66) to the internal space of the casing (21). Is discharged.
- the refrigerant flowing through the second suction communication pipe (34b) is further compressed in the fourth compression chamber (64) of the fourth compression mechanism (27) and then discharged from the discharge port to the internal space of the casing (21).
- the compression provided with the first to fourth compression mechanisms (24, 25, 26, 27) each having one compression chamber (61, 62, 63, 64).
- the phase of the fluctuation cycle of the volume of the first compression chamber (61) and the second compression chamber (62) is shifted by 180 ° from each other, and the third compression chamber (63) and the fourth compression chamber (64) The phase of the fluctuation period of the volume of the is doing.
- the phase in which the refrigerant reaches the maximum pressure in the third compression chamber (63) and the fourth compression chamber (64) is shifted by 180 ° to deactivate the cylinder.
- the compression torque during operation can be reduced.
- the phase at which the refrigerant reaches the maximum pressure is shifted by 180 ° in the first compression chamber (61) and the second compression chamber (62) on the lower stage side, and the two-stage compression operation is performed. The compression torque during the compression operation can be effectively reduced.
- the phases of the first piston (71) and the third piston (73) are shifted by 180 ° around the drive shaft (23), and the second piston (72) and the fourth piston are shifted.
- the phase of (74) is shifted 180 ° around the drive shaft (23). Therefore, the centrifugal force of the first piston (71) and the third piston (73) and the centrifugal force of the second piston (72) and the fourth piston (74) can cancel each other. Therefore, the torque of the drive shaft (23) can be further reduced, and the compressor (20) can be reduced in noise and vibration.
- the first piston (71) and the fourth piston (74) are shifted in phase by 180 °, and the second piston
- each piston (71, 72, 73, 74) may be canceled by shifting the phase of (72) and the third piston (73) by 180 °. Also in this case, the phase of the fluctuation cycle of the volume of the first compression chamber (61) and the second compression chamber (62) is shifted by 180 °, and the third compression chamber (63) and the fourth compression chamber (64) are shifted. By shifting the phase of the volume fluctuation cycle by 180 °, the compression torque for each compression operation can be reduced.
- the parallel compression operation, cylinder deactivation operation, and two-stage compression operation can be switched.
- the refrigeration apparatus may be configured so that any two of these three operations are switched to each other.
- the compression mechanism of the compressor (20) is constituted by a compression mechanism in which an annular piston rotates eccentrically, or a rotary piston type rotary compression mechanism.
- a rotary piston type or a compression mechanism of other configuration may be used.
- the refrigeration apparatus of each of the above embodiments is suitable for an air conditioner (1) that exchanges heat between air and refrigerant. It is used.
- the refrigeration apparatus of the present invention may be applied to a cold / hot water chiller or a water heater that obtains cold water or hot water by exchanging heat between a heat medium such as water and a refrigerant.
- the present invention is useful for a refrigeration apparatus that includes a compressor having a plurality of compression chambers and performs a refrigeration cycle.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/224,420 US8225624B2 (en) | 2006-03-09 | 2007-03-06 | Refrigeration system |
CN2007800066172A CN101389867B (zh) | 2006-03-09 | 2007-03-06 | 冷冻装置 |
AU2007223244A AU2007223244B2 (en) | 2006-03-09 | 2007-03-06 | Refrigeration system |
EP07737852.9A EP1992820A4 (en) | 2006-03-09 | 2007-03-06 | FREEZING DEVICE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006064539A JP4797715B2 (ja) | 2006-03-09 | 2006-03-09 | 冷凍装置 |
JP2006-064539 | 2006-03-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007102496A1 true WO2007102496A1 (ja) | 2007-09-13 |
Family
ID=38474924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/054305 WO2007102496A1 (ja) | 2006-03-09 | 2007-03-06 | 冷凍装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8225624B2 (ja) |
EP (1) | EP1992820A4 (ja) |
JP (1) | JP4797715B2 (ja) |
KR (1) | KR101006601B1 (ja) |
CN (1) | CN101389867B (ja) |
AU (1) | AU2007223244B2 (ja) |
WO (1) | WO2007102496A1 (ja) |
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EP2261579A4 (en) * | 2008-03-18 | 2011-05-25 | Daikin Ind Ltd | FREEZING DEVICE |
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- 2007-03-06 EP EP07737852.9A patent/EP1992820A4/en not_active Withdrawn
- 2007-03-06 US US12/224,420 patent/US8225624B2/en not_active Expired - Fee Related
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---|---|---|---|---|
EP2196677A1 (en) * | 2007-09-14 | 2010-06-16 | Daikin Industries, Ltd. | Rotary fluid machine |
EP2196677A4 (en) * | 2007-09-14 | 2015-01-14 | Daikin Ind Ltd | ROTATION TURBOMACHINE |
EP2261579A4 (en) * | 2008-03-18 | 2011-05-25 | Daikin Ind Ltd | FREEZING DEVICE |
Also Published As
Publication number | Publication date |
---|---|
JP2007239666A (ja) | 2007-09-20 |
KR20080087894A (ko) | 2008-10-01 |
CN101389867A (zh) | 2009-03-18 |
EP1992820A1 (en) | 2008-11-19 |
US8225624B2 (en) | 2012-07-24 |
AU2007223244B2 (en) | 2010-02-25 |
US20090013714A1 (en) | 2009-01-15 |
CN101389867B (zh) | 2012-05-23 |
EP1992820A4 (en) | 2014-01-08 |
AU2007223244A1 (en) | 2007-09-13 |
KR101006601B1 (ko) | 2011-01-07 |
JP4797715B2 (ja) | 2011-10-19 |
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