WO2018150494A1 - 圧縮機 - Google Patents
圧縮機 Download PDFInfo
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- WO2018150494A1 WO2018150494A1 PCT/JP2017/005568 JP2017005568W WO2018150494A1 WO 2018150494 A1 WO2018150494 A1 WO 2018150494A1 JP 2017005568 W JP2017005568 W JP 2017005568W WO 2018150494 A1 WO2018150494 A1 WO 2018150494A1
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- WIPO (PCT)
- Prior art keywords
- refrigerant
- suction port
- compressor
- r1234yf
- compression mechanism
- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
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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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/123—Fluid connections
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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
- F04C18/34—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 the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—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 the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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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
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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
- F04C2210/00—Fluid
- F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
- F04C2210/263—HFO1234YF
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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
- F04C2210/00—Fluid
- F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
- F04C2210/266—Propane
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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
- F04C2210/00—Fluid
- F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
- F04C2210/268—R32
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
Definitions
- the present invention relates to a compressor that compresses and discharges a refrigerant.
- Hydrofluoroolefin or hydrocarbon has a smaller GWP (global warming potential) than R410A or R32 conventionally used as a refrigerant, and is a promising refrigerant as a refrigerant used for countermeasures against global warming.
- GWP global warming potential
- a compressor using an operating refrigerant mainly composed of hydrofluoroolefin has been proposed (see, for example, Patent Document 1).
- hydrofluoroolefin or hydrocarbon is a promising refrigerant as a refrigerant used for countermeasures against global warming because GWP is smaller than that of conventional refrigerant R410 or R32.
- hydrofluoroolefins or hydrocarbons have a lower refrigeration capacity per volume than conventional refrigerants such as R32. Therefore, when hydrofluoroolefin or hydrocarbon is used as the operating refrigerant, it is necessary to increase the flow rate of the operating refrigerant in order to achieve a refrigerating capacity equivalent to that of the conventional refrigerant, and the operating refrigerant is sucked into the compressor. The pressure loss that occurs is increased.
- the present invention has been made to solve the above-described problems, and provides a compressor that suppresses a pressure loss that occurs when a working refrigerant is sucked into the compressor.
- a compressor according to the present invention includes a hermetic container and a compression mechanism unit that compresses the refrigerant that is contained in the hermetic container and flows into the hermetic container, and the compression mechanism unit has a suction port for sucking the refrigerant.
- the relationship between the diameter d [m] of the suction port and the stroke volume V st [m 3 ] of the compression mechanism section is 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 .
- the relationship between the diameter d [m] of the suction port and the stroke volume V st [m 3 ] of the compression mechanism is 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇
- V st [m 3 ] of the compression mechanism is 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇
- FIG. 3 is a sectional view taken along line AA in FIG. 2.
- FIG. 3 is a sectional view taken along line BB in FIG.
- FIG. 6 is a diagram illustrating a pipe friction coefficient ⁇ of the suction port when the dimensions of the suction port and the stroke volume capacity of the compressor according to Embodiment 1 of the present invention are changed.
- the suction pressure loss ⁇ P of the compressor according to the first embodiment of the present invention is shown by contour lines.
- the suction pressure loss ⁇ P in the case of using propane alone as the operating refrigerant of the compressor according to Embodiment 2 of the present invention is shown by contour lines. It is a figure which shows the mixing ratio of R32 refrigerant
- FIG. 10 is a schematic view of the compression mechanism section of the compressor according to Embodiment 7 of the present invention, taken along the line FF in FIG. 3.
- FIG. 1 is an internal configuration diagram showing the inside of the compressor according to Embodiment 1 of the present invention.
- a twin rotary type compressor 100 having two cylindrical cylinders in the compression mechanism section will be described as an example of the compressor.
- the compressor 100 is a hermetic electric compressor including a hermetic container 1, and an electric motor unit 2 and a compression mechanism unit 3 inside the hermetic container 1.
- the sealed container 1 includes a bottomed cylindrical lower sealed container 13 and an upper sealed container 12 that closes an upper opening of the lower sealed container 13.
- the connecting portion between the lower sealed container 13 and the upper sealed container 12 is fixed by welding, and the sealed state is maintained.
- a suction pipe 15 is connected to the lower sealed container 13, and a suction muffler 14 is attached to the suction pipe 15.
- the suction pipe 15 is a connection pipe for sending the gas refrigerant flowing in via the suction muffler 14 into the compression mechanism unit 3.
- the lower airtight container 13 may be provided with an oil supply mechanism in which lubricating oil supplied to the compression mechanism unit 3 is stored.
- the discharge pipe 4 is connected to the upper sealed container 12 on the axis extension line of the rotating shaft 31.
- the discharge pipe 4 is a pipe that is attached to the sealed container 1 and discharges the refrigerant compressed by the compression mechanism unit 3 to the outside of the sealed container 1.
- the discharge pipe 4 should just be provided in the airtight container 1, and does not necessarily need to be arrange
- the upper sealed container 12 is further provided with an airtight terminal 16 for electrical connection with the electric motor unit 2 in the sealed container 1 and a rod 17 to which a cover for protecting the airtight terminal 16 is attached.
- the electric motor unit 2 includes a stator 21 fixed to the lower hermetic container 13 and a rotor 22 provided rotatably on the inner peripheral side of the stator 21.
- a rotation shaft 31 is fixed to the center of the rotor 22.
- the stator 21 is fixed to the lower sealed container 13 of the sealed container 1 by various fixing methods such as shrink fitting and welding.
- the stator 21 is electrically connected to the hermetic terminal 16 by a lead wire 18.
- FIG. 2 is a longitudinal sectional view showing a compression mechanism portion of the compressor according to Embodiment 1 of the present invention.
- 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG.
- the configuration of the compression mechanism unit 3 will be described with reference to FIGS. 3 and 4, the illustration of the eccentric shaft portion 31c and the eccentric shaft portion 31d is omitted.
- the compression mechanism section 3 is accommodated in the sealed container 1 and compresses the refrigerant flowing into the sealed container 1.
- the compression mechanism unit 3 is a twin rotary type compression mechanism having two cylindrical cylinders.
- the compression mechanism unit 3 is disposed below the electric motor unit 2 in the sealed container 1 and fixed to the lower sealed container 13. Yes.
- the compression mechanism unit 3 includes a rotary shaft 31, a main bearing 32, a sub bearing 33, a first cylindrical cylinder 34a, a first rolling piston 35a, a second cylindrical cylinder 34b, and a second rolling piston. 35b and a partition plate 36.
- the rotary shaft 31 is connected to the rotor 22 of the electric motor unit 2 and transmits the rotational force of the electric motor unit 2 to the compression mechanism unit 3.
- the rotating shaft 31 includes a main shaft portion 31a fixed to the rotor 22 of the electric motor unit 2, and a sub shaft portion 31b provided on the opposite side of the main shaft portion 31a in the axial direction.
- the rotating shaft 31 is provided between the main shaft portion 31a and the subshaft portion 31b, and an eccentric shaft portion 31c inserted into the first rolling piston 35a and an eccentric shaft inserted into the second rolling piston 35b. Part 31d.
- the eccentric shaft portion 31c and the eccentric shaft portion 31d are arranged with a predetermined phase difference (for example, 180 °).
- the rotary shaft 31 has a main shaft portion 31 a that is rotatably supported by a main bearing 32 and a sub shaft portion 31 b that is rotatably supported by a sub bearing 33.
- the main bearing 32 is a closing member that closes one end face (on the motor part 2 side) of both ends of the first cylindrical cylinder 34a.
- the main bearing 32 and the first cylindrical cylinder 34a are molded and assembled as separate articles.
- the sub-bearing 33 is a closing member that closes one end face of the both ends of the second cylindrical cylinder 34b (on the opposite side to the electric motor part 2 in the axial direction).
- the sub bearing 33 and the second cylindrical cylinder 34b are molded and assembled as separate articles.
- the first cylindrical cylinder 34a is formed in a substantially cylindrical shape, and both end surfaces of the substantially cylindrical shape are closed by the main bearing 32 and the partition plate 36 in the axial direction of the rotary shaft 31, as shown in FIG.
- a chamber 40a sealed in the internal space of the first cylindrical cylinder 34a is formed.
- the chamber 40a accommodates an eccentric shaft portion 31c of the rotating shaft 31 shown in FIG. 2 and a first rolling piston 35a that is rotatably fitted to the eccentric shaft portion 31c.
- the first cylindrical cylinder 34a is formed with a first vane sliding groove 41a in the radial direction.
- a first vane 37a is provided in the first vane sliding groove 41a.
- the first cylindrical cylinder 34a of the compression mechanism unit 3 is provided with a first suction port 42a for sucking the refrigerant.
- the first suction port 42a is formed in the radial direction of the first cylindrical cylinder 34a.
- the first suction port 42a is connected to the suction pipe 15 described above and serves as a path for guiding the refrigerant into the chamber 40a of the first cylindrical cylinder 34a.
- the first rolling piston 35a is mounted on the eccentric shaft portion 31c of the rotary shaft 31 shown in FIG. 2, and the first vane 37a that rotates eccentrically in the chamber 40a as the rotary shaft 31 rotates and is pressed against the outer periphery.
- a compression chamber is configured to perform a suction operation and a compression operation.
- the first vane 37a is pressed against the first rolling piston 35a by an urging means (not shown).
- the first vane 37a reciprocates in the first vane sliding groove 41a while contacting the first rolling piston 35a.
- the first vane 37a reciprocates in the first vane sliding groove 41a, and a space formed between the first cylindrical cylinder 34a and the first rolling piston 35a is defined as a suction chamber and a compression chamber. It is divided into.
- the second cylindrical cylinder 34b is formed in a substantially cylindrical shape, and both end surfaces of the substantially cylindrical shape are closed by the auxiliary bearing 33 and the partition plate 36 in the axial direction of the rotary shaft 31, as shown in FIG.
- a sealed chamber 40b is formed in the internal space of the second cylindrical cylinder 34b.
- the chamber 40b accommodates an eccentric shaft portion 31d of the rotary shaft 31 shown in FIG. 2 and a second rolling piston 35b that is rotatably fitted to the eccentric shaft portion 31d.
- the second cylindrical cylinder 34b has a second vane sliding groove 41b formed in the radial direction.
- a second vane 37b is provided in the second vane sliding groove 41b.
- the second cylindrical cylinder 34b of the compression mechanism unit 3 is provided with a second suction port 42b for sucking the refrigerant.
- the second suction port 42b is formed in the radial direction of the second cylindrical cylinder 34b.
- the second suction port 42b is connected to the suction pipe 15 described above and serves as a path for guiding the refrigerant into the chamber 40b of the second cylindrical cylinder 34b.
- the second rolling piston 35b is attached to the eccentric shaft portion 31d of the rotary shaft 31 shown in FIG. 2, and the second vane 37b is rotated eccentrically in the chamber 40b by the rotation of the rotary shaft 31 and pressed against the outer periphery.
- a compression chamber is configured to perform a suction operation and a compression operation.
- the second vane 37 b is pressed against the second rolling piston 35 b by urging means (not shown).
- the second vane 37b reciprocates in the second vane sliding groove 41b while being in contact with the second rolling piston 35b as the eccentric shaft portion 31d rotates.
- the second vane 37b reciprocates in the second vane sliding groove 41b, and a space formed between the second cylindrical cylinder 34b and the second rolling piston 35b is defined as a suction chamber and a compression chamber. It is divided into.
- the partition plate 36 is provided between the first cylindrical cylinder 34a and the second cylindrical cylinder 34b.
- the partition plate 36 has one end face (opposite to the electric motor section 2) of one end of the first cylindrical cylinder 34a and one end (electric motor section) of the second cylindrical cylinder 34b.
- 2 is a closing member that closes the end surface on the second side.
- the operating refrigerant of the compressor 100 uses R1234yf, which is a kind of hydrofluoroolefin, as a single refrigerant.
- Table 1 shows a comparison of physical property values of R1234yf and R32 used as a conventional refrigerant.
- the physical property value of each refrigerant is REFPROP ver. Of National Institute of Standards and Technology (NIST). Using 9.0, it was determined under the measurement conditions of a condensation temperature of 52 ° C., an evaporation temperature of 5 ° C., a subcool of 5 deg, and a superheat of 10 deg.
- R1234yf alone has a volume ratio capacity of about half that of R32 alone. Therefore, when R1234yf is used as a single refrigerant in a compressor, in order to achieve a refrigerating capacity equivalent to a compressor using R32 as a single refrigerant, the flow rate of refrigerant flowing through the compressor is compressed using R32 as a single refrigerant. It is necessary to make it about twice the machine. As a result, in the compressor using R1234yf as a single refrigerant, the flow rate of the refrigerant increases, so that the pressure loss generated when the working refrigerant is sucked into the compressor increases. Therefore, when R1234yf is used as a single refrigerant, it is necessary to suppress pressure loss that occurs when the working refrigerant is sucked into the compressor.
- the rotating shaft 31 rotates when the electric motor unit 2 is driven.
- the eccentric shaft portion 31c and the eccentric shaft portion 31d of the rotating shaft 31 rotate.
- the first rolling piston 35a attached to the eccentric shaft portion 31c rotates eccentrically in the first cylindrical cylinder 34a
- the second rolling piston 35b attached to the eccentric shaft portion 31d serves as the second cylindrical cylinder. It rotates eccentrically within 34b.
- the first rolling piston 35a covering the eccentric shaft portion 31c of the rotating shaft 31 is eccentrically rotated in the first cylindrical cylinder 34a by the rotation of the rotating shaft 31, and is delimited by the first vane 37a.
- the compression chamber capacity in the first cylindrical cylinder 34a changes continuously. That is, as the first rolling piston 35a rotates, the volume of the space surrounded by the first cylindrical cylinder 34a, the first rolling piston 35a, and the first vane 37a is reduced in the chamber 40a. The refrigerant is compressed.
- the second rolling piston 35b covering the eccentric shaft portion 31d of the rotating shaft 31 is eccentrically rotated in the second cylindrical cylinder 34b by the rotation of the rotating shaft 31, thereby being separated by the second vane 37b.
- the compression chamber capacity in the second cylindrical cylinder 34b is continuously changed. That is, the rotation of the second rolling piston 35b reduces the volume of the space surrounded by the second cylindrical cylinder 34b, the second rolling piston 35b, and the second vane 37b in the chamber 40b.
- the refrigerant is compressed.
- the compression chamber is provided with a discharge valve (not shown) that is released when the pressure exceeds a predetermined pressure, and high-pressure refrigerant gas is discharged from the chamber 40a and the chamber 40b into the sealed container 1 when the pressure exceeds the predetermined pressure.
- the compressed refrigerant gas passes through the clearance of the electric motor unit 2 and is discharged from the discharge pipe 4 into the refrigerant circuit outside the compressor 100.
- Lubricating oil is stored in the lower part of the hermetic container 1, and the oil is supplied to each part by an oil supply mechanism (not shown) of the rotating shaft 31 to keep the compression mechanism part 3 lubricated.
- the compressor 100 according to Embodiment 1 of the present invention is a twin rotary type compressor and has two cylinders. Therefore, the compressor 100 sets a stroke volume for each cylinder.
- the stroke volume V1 [m 3 ] is a refrigerant constituted by the first cylindrical cylinder 34a, the main bearing 32, the partition plate 36, the first rolling piston 35a, and the first vane 37a. It is the volume of the space to be excluded.
- the stroke volume V2 [m 3 ] excludes the refrigerant composed of the second cylindrical cylinder 34b, the auxiliary bearing 33, the partition plate 36, the second rolling piston 35b, and the second vane 37b. It is the volume of the space to be.
- the compressor 100 uses a twin rotary type compressor, a single rotary type compressor may be used.
- the stroke volume is the volume of the space formed by the cylindrical cylinder, the main bearing, the auxiliary bearing, the rolling piston, and the vane.
- the relationship between the suction port and the stroke volume which is a feature of the present invention, is a relationship in any one cylinder, and does not represent a correlation between different cylinders.
- the stroke volume V st [m 3 ] is used as a general term for the above stroke volume.
- the stroke volume V st [m 3 ] is the amount of refrigerant discharged from any one cylinder when the rotating shaft 31 makes one rotation.
- the compressor 100 according to Embodiment 1 of the present invention is a twin rotary type compressor, and has a suction port for each cylinder.
- the first cylindrical cylinder 34a is formed with a first suction port 42a in the radial direction
- the second cylindrical cylinder 34b is formed with a second suction port 42b in the radial direction.
- the relationship between the suction port and the stroke volume which is a feature of the present invention, is a relationship in any one cylinder, and does not represent a correlation between different cylinders. Therefore, in the following description, the first suction port 42a will be described, and the description of the second suction port 42b will be omitted.
- the description of the first suction port 42a is similarly applied to the second suction port 42b in the second cylindrical cylinder 34b. Further, when a single rotary type compressor is used, the compressor is applied to a suction port used for the cylinder.
- the stroke volume and the suction port described above have the following relationship.
- suction pressure loss An in-pipe friction loss (hereinafter referred to as suction pressure loss) ⁇ P in the first suction port 42a is derived from the Darcy-Weissbach equation of the following equation (1).
- ⁇ P is the suction pressure loss [Pa]
- ⁇ is the pipe friction coefficient
- l is the length [m] of the first suction port 42a
- d is the diameter [m] of the first suction port 42a
- U represents the refrigerant flow rate [m / s].
- coolant flow velocity U [m / s] of Formula (1) can be represented by following formula (2).
- r represents the compressor speed [rps]
- V st represents the stroke volume [m 3 ]
- d represents the diameter [m] of the first suction port 42a.
- ⁇ represents the viscosity [Pa ⁇ s] of the refrigerant.
- the pipe friction coefficient ⁇ is calculated from the repeated calculation of the Prandtl-Karman equation of the following equation (4). In the iterative calculation, the true pipe friction coefficient ⁇ is obtained by changing the pipe friction coefficient ⁇ on both sides little by little.
- the refrigerant density ⁇ [kg / m 3 ], the compressor rotation speed r [rps], and the refrigerant viscosity ⁇ [Pa ⁇ s] are also determined.
- the conditions in Table 2 are used as general cooling setting conditions.
- FIG. 5 illustrates the pipe friction coefficient ⁇ of the suction port when the dimensions of the suction port and the stroke volume capacity of the compressor according to Embodiment 1 of the present invention are changed.
- the dimension of the diameter d [m] of the first suction port 42a of the compressor is 4 ⁇ 10 ⁇ 3 [m] ⁇ d ⁇ 20 ⁇ 10 ⁇ 3 [m]
- the stroke volume V st [m 3 ] the tube friction coefficient ⁇ of the first suction port 42a when the capacity is 5 ⁇ 10 ⁇ 6 [m 3 ] ⁇ V st ⁇ 130 ⁇ 10 ⁇ 6 [m 3 ] is obtained.
- FIG. 5 shows a calculation result obtained by obtaining the pipe friction coefficient ⁇ .
- the Reynolds number Re is the diameter d of the first suction port 42a. It is a variable between [m] and the stroke volume V st [m 3 ].
- the pipe friction coefficient ⁇ can be approximated by the diameter d [m] of the first suction port 42a and the stroke volume V st [m 3 ].
- the pipe friction coefficient ⁇ approximated by the diameter d [m] of the first suction port 42a and the stroke volume V st [m 3 ] is expressed by the equation (5).
- the stroke volume V st [m 3 ] of the compression mechanism unit 3 is 5 ⁇ 10 ⁇ 6 ⁇ V It is set within the range of st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 .
- the stroke volume V st [m 3 ] of the compressor using R32 as the refrigerant is generally set in the range of 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 55 ⁇ 10 ⁇ 6 .
- the R1234yf single refrigerant is the R32 single refrigerant. Compared to the above, 1.96 times the refrigerant flow rate is required.
- R1234yf single refrigerant is used for the stroke volume V st [m 3 ] of the compressor using R32 whose capacity is generally set in the range of 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 55 ⁇ 10 ⁇ 6.
- the compressor needs to set the capacity of the stroke volume V st [m 3 ] to 1.96 times. Therefore, when the single refrigerant of R1234yf is used as the working refrigerant, the stroke volume V st [m 3 ] of the compression mechanism unit 3 is within the range of 9.8 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 108 ⁇ 10 ⁇ 6 .
- the dimension of the diameter d [m] of the first suction port 42a of the compressor is restricted so as to be formed less than the thickness of the cylinder of the compression mechanism section 3.
- the dimension of the diameter d [m] of the first suction port 42a is equal to the cross-sectional area S [m 2 ] of the passage cross section.
- the relationship between the diameter d [m] of the suction port and the stroke volume V st [m 3 ] of the compression mechanism section is 5 ⁇ 10 ⁇ . 6 ⁇ V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 is satisfied so that a hydrofluoroolefin refrigerant having a large refrigerant flow rate is used. It is possible to suppress the sudden increase in the suction pressure loss ⁇ P of the compressor.
- the GWP of the refrigerant can be lowered by using the hydrofluoroolefin refrigerant, and the compressor efficiency of the compressor can be improved by suppressing the intake pressure loss ⁇ P of the compressor from rising sharply. .
- the stroke volume V st [m 3 ] of the compression mechanism section is 9.8 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 108 ⁇ 10 ⁇ 6
- the relationship between the suction port diameter d [m] and the stroke volume V st [m 3 ] of the compression mechanism is 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 -3 ) ⁇ 10 -3 + 1 ⁇ 10 -5 satisfying the relationship, the suction pressure loss ⁇ P of the compressor using the single refrigerant of R1234yf having a large refrigerant flow rate increases sharply. Can be suppressed.
- Embodiment 2 FIG. In Embodiment 1, the operation refrigerant of the compressor 100 has been described using R1234yf, which is one type of hydrofluoroolefin, as a single refrigerant. In the compressor according to Embodiment 2 of the present invention, another operating refrigerant used for the compressor 100 will be described.
- the operating refrigerant is not limited to a single refrigerant of R1234yf, and other hydrofluoroolefins may be used as the operating refrigerant, or hydrocarbons such as propane may be used.
- the operating refrigerant may be a mixed refrigerant of two kinds of hydrofluoroolefins, or a mixed refrigerant of two or more kinds of refrigerants including a hydrofluoroolefin and a refrigerant other than hydrofluoroolefin (for example, R32). There may be.
- the GWP of the mixed refrigerant is desirably less than 500, and more desirably less than 100.
- Table 3 shows a comparison of physical property values of the refrigerant composition used in the compressor 100.
- the physical property value of each refrigerant is REFPROP ver. Of National Institute of Standards and Technology (NIST). Using 9.0, it was determined under the measurement conditions of a condensation temperature of 52 ° C., an evaporation temperature of 5 ° C., a subcool of 5 deg, and a superheat of 10 deg.
- the pipe friction coefficient ⁇ using s] is introduced into ⁇ P in the equation (6) and illustrated.
- the value of the suction pressure loss ⁇ P changes (rises) due to the difference between the refrigerant density ⁇ and the refrigerant viscosity ⁇ , but V st > 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ ) as in the compressor 100 of the first embodiment.
- the compressor 100 has a relationship between the diameter d [m] of the first suction port 42a and the stroke volume V st [m 3 ] of the compression mechanism section 3. It is desirable that the pressure loss ⁇ P is configured to satisfy the relationship of V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 so that the pressure loss ⁇ P does not rise sharply.
- the stroke volume V st [m 3 ] of the compression mechanism unit 3 is 5 ⁇ 10 ⁇ 6 ⁇ V It is set within the range of st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 .
- the stroke volume V st [m 3 ] of the compressor using R32 as the refrigerant is generally set in the range of 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 55 ⁇ 10 ⁇ 6 .
- the propane simple refrigerant is an R32 simple refrigerant.
- the flow rate of the refrigerant is 1.68 times.
- a propane simple substance refrigerant is used for the stroke volume V st [m 3 ] of the compressor using R32 whose capacity is generally set in the range of 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 55 ⁇ 10 ⁇ 6.
- the compressor needs to set the capacity of the stroke volume V st [m 3 ] to 1.68 times. Therefore, when the propane simple refrigerant is used as the working refrigerant, the stroke volume V st [m 3 ] of the compression mechanism unit 3 is within the range of 8.4 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 92 ⁇ 10 ⁇ 6. Must be set.
- the dimension of the diameter d [m] of the first suction port 42a of the compressor is restricted so as to be formed less than the thickness of the cylinder of the compression mechanism section 3.
- the dimension of the diameter d [m] of the first suction port 42a is equal to the cross-sectional area S [m 2 ] of the passage cross section.
- the stroke volume V st [m 3 ] of the compression mechanism section is 8.4 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 92 ⁇ 10. is set within a range of -6, the diameter d [m] of the intake port, the relationship between the stroke volume V st [m 3] of the compression mechanism part, 5 ⁇ 10 -6 ⁇ V st ⁇ 9 ⁇ (d- 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 so that the intake pressure loss ⁇ P of the compressor using a single propane refrigerant with a large refrigerant flow rate increases sharply. Can be suppressed. As a result, the GWP of the refrigerant can be lowered by using a single propane refrigerant, and the compressor efficiency of the compressor can be improved by suppressing the suction pressure loss ⁇ P of the compressor from rising sharply. .
- the configuration satisfies 10 ⁇ 6 ⁇ V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 .
- the refrigerant flow rate required for the compressor changes. Therefore, the lower limit value of the stroke volume V st [m 3 ] of the compression mechanism section 3 as shown in Table 3 based on the volume ratio refrigeration capacity ratio of each mixed refrigerant with respect to the ratio of each refrigerant to the total mass of the operating refrigerant. And the upper limit.
- the stroke volume V st [m 3] is set in the range of 9.8 ⁇ 10 -6 [m 3] ⁇ V st ⁇ 86.8 ⁇ 10 -6 [m 3] .
- the stroke volume V st [m 3 ] with respect to the ratio of each refrigerant to the mass of the entire operating refrigerant is set within any one of the conditions (1) to (5) in Table 4 below. .
- the stroke volume V st [m 3 ] of the compression mechanism section is The range shown in Table 4 is set, and the relationship between the diameter d [m] of the suction port and the stroke volume V st [m 3 ] of the compression mechanism section is 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 9 ⁇ (d -4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 so that two types of mixed refrigerants including R32 and R1234yf having a large refrigerant flow rate are used.
- FIG. 8 is a diagram illustrating a mixing ratio of the R32 refrigerant, the R1234yf refrigerant, and the R1123 refrigerant. Furthermore, the present inventor also uses three types of mixed refrigerants including R32, R1234yf, and R1123 shown in Table 3 as the operating refrigerant, as in the compressor 100 of the first embodiment, V st > 9 ⁇ ( It was found that the suction pressure loss ⁇ P increased rapidly at d-4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 .
- the relationship between the diameter d [m] of the first suction port 42a and the stroke volume V st [m 3 ] of the compression mechanism section 3 is such that the suction pressure loss ⁇ P does not rise steeply. It is desirable that the configuration satisfies 10 ⁇ 6 ⁇ V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 .
- the refrigerant flow rate required for the compressor changes.
- the stroke volume V st [ m 3 ] is set within the range shown in Table 5, and the relationship between the diameter d [m] of the suction port and the stroke volume V st [m 3 ] of the compression mechanism is 5 ⁇ 10 ⁇ 6 ⁇ V st ⁇ 9 ⁇ (d ⁇ 4 ⁇ 10 ⁇ 3 ) ⁇ 10 ⁇ 3 + 1 ⁇ 10 ⁇ 5 to satisfy the relationship, compression using three mixed refrigerants including R32, R1234yf, and R1123 with a large refrigerant flow rate A sudden rise in the suction pressure loss ⁇ P of the machine can be suppressed.
- Embodiment 3 In the compressor 100 according to Embodiment 1 of the present invention, the case where the compression mechanism unit 3 is configured by forming and assembling the first cylindrical cylinder 34a and the main bearing 32 as separate parts is shown.
- the compressor 100 according to Embodiment 3 of the present invention is formed by integrally molding a cylindrical cylinder and a closing member that closes an end surface of the cylindrical cylinder in the axial direction of the rotary shaft 31.
- the compressor 100 according to Embodiment 3 of the present invention will be described. Parts having the same configuration as those of the compressors of FIGS. 1 to 6 are denoted by the same reference numerals and description thereof is omitted.
- FIG. 9 is a schematic view of part C in FIG.
- FIG. 10 is a schematic diagram of the compression mechanism portion of the compressor according to Embodiment 3 of the present invention at the portion C in FIG.
- the flow of the refrigerant is indicated by arrows, and the rotating shaft 31 and the first rolling piston 35a are not shown.
- the first cylindrical cylinder 34a and the main bearing 32 are formed as separate parts and assembled as shown in FIG.
- the compression mechanism unit 3 includes the first cylindrical cylinder 34a shown in FIG. 9 and the both ends of the first cylindrical cylinder 34a. It has an integral cylinder 34c integrally formed with a main bearing 32 of a closing member that closes one end face.
- the integrated cylinder 34c is formed integrally with the first cylindrical cylinder 34a and the main bearing 32 without increasing the size of the compression mechanism section 3 in the axial direction of the rotary shaft 31 shown in FIG.
- the thickness of the axial wall of the cylinder 34c can be increased. Therefore, the suction port 42c formed in the integrated cylinder 34c can have a larger diameter than the first suction port 42a shown in FIG.
- the integrated cylinder 34c can be formed such that the cross-sectional area S11 of the suction port 42c is larger than the cross-sectional area S1 of the first suction port 42a.
- the integrated cylinder 34c has a structure in which the second cylindrical cylinder 34b and the auxiliary bearing 33 are integrated instead of the configuration in which the first cylindrical cylinder 34a and the main bearing 32 are integrally formed as shown in FIG. A molded configuration may be used.
- the integrated cylinder 34c may be configured such that the first cylindrical cylinder 34a and the main bearing 32 are integrally molded, and the second cylindrical cylinder 34b and the auxiliary bearing 33 may be integrally molded. . Further, the integral cylinder 34 c may use a partition plate 36 instead of the main bearing 32 and the sub bearing 33.
- the integrated cylinder 34c may have a configuration in which the first cylindrical cylinder 34a and the partition plate 36 are integrally molded, or may have a configuration in which the second cylindrical cylinder 34b and the partition plate 36 are integrally molded. Or what combined said structure may be sufficient.
- the diameter of the suction port is increased by integrally forming the cylindrical cylinder and the closing member that closes the end surface of the cylindrical cylinder.
- the cross-sectional area of the suction port can be increased. As a result, the pressure loss of the refrigerant flowing through the suction port can be reduced.
- Embodiment 4 FIG.
- the compressor 100 according to the fourth embodiment of the present invention is formed by integrally forming a cylindrical cylinder and a closing member that closes an end surface of the cylindrical cylinder, and also expands the diameter of the suction port.
- the compressor 100 according to Embodiment 4 of the present invention will be described. Parts having the same configuration as those of the compressors of FIGS. 1 to 10 are denoted by the same reference numerals and description thereof is omitted.
- FIG. 11 is a schematic diagram of the compression mechanism section of the compressor according to the fourth embodiment of the present invention, in section C of FIG.
- the compressor 100 according to Embodiment 4 of the present invention has an integrated cylinder 34c in which a first cylindrical cylinder 34a and a main bearing 32 are integrally formed.
- the diameter r1 of the suction port 42d is between the bottom surface portion 40a1 and the ceiling surface portion 40a2 of the chamber 40a formed in the integral cylinder 34c in the axial direction of the rotary shaft 31 shown in FIG. It is formed larger than the dimension of the distance h1.
- the cross-sectional area S21 of the suction port 42c may be larger than the cross-sectional area S1 of the first suction port 42a, as compared with the compressor 100 according to Embodiment 1 shown in FIG. it can.
- the cylindrical cylinder and the closing member that closes the end surface of the cylindrical cylinder are integrally formed, and the diameter dimension of the suction port is the cylindrical cylinder. Since the size of the distance between the bottom surface of the chamber and the ceiling surface is larger, the cross-sectional area of the suction port can be increased. As a result, the pressure loss of the refrigerant flowing through the suction port can be reduced.
- FIG. FIG. 12 is a partial schematic plan view of a compression mechanism section of a compressor according to Embodiment 5 of the present invention.
- the compressor 100 according to Embodiment 5 of the present invention will be described.
- the arrow indicates the flow of the refrigerant flowing into the chamber 40a.
- Parts having the same configuration as those of the compressors of FIGS. 1 to 11 are denoted by the same reference numerals and description thereof is omitted.
- the compressor 100 according to Embodiment 5 of the present invention has an inlet cross-sectional area S31 at the inlet 44a1 of the first suction port 42a or an outlet cross-sectional area S32 at the outlet 44a2 of the first suction port 42a.
- the passage portion 44a3 in the first suction port 42a is formed larger than the passage portion sectional area S33.
- the inlet cross-sectional area S31 at the inlet 44a1 and the outlet cross-sectional area S32 at the outlet 44a2 are larger than the path cross-sectional area S33 of the path 44a3 at the suction port. Largely formed.
- the compressor 100 according to Embodiment 5 of the present invention is such that, in the suction port, the cross-sectional area of the inlet portion or the outlet portion is formed larger than the cross-sectional area of the midway path in the suction port. .
- the compressor 100 according to Embodiment 5 of the present invention is such that, in the suction port, the cross-sectional area of the inlet portion and the outlet portion is formed larger than the cross-sectional area of the midway path in the suction port.
- the first suction port 42a has been described.
- the second suction port 42b may have the same configuration.
- FIG. FIG. 13 is a partial schematic plan view of a compression mechanism section of a compressor according to Embodiment 6 of the present invention.
- the compressor 100 according to Embodiment 6 of the present invention will be described. Parts having the same configuration as those of the compressors of FIGS. 1 to 12 are denoted by the same reference numerals and description thereof is omitted.
- the shape of the inlet portion 44a1 or the outlet portion 44a2 of the first suction port 42a is formed in a circle or an ellipse, and the first suction port
- the shape of the path part 44a3 in 42a is formed in a circle or an ellipse, and the cross section of the inlet part 44a1 and the outlet part 44a2 and the cross section of the path part 44a3 are formed concentrically.
- the cross section of the inlet portion and the outlet portion and the cross section of the path portion in the suction port are formed concentrically. As a result, bending of the refrigerant flow at the inlet and outlet of the suction port can be reduced, and pressure loss can be reduced.
- the first suction port 42a has been described.
- the second suction port 42b may have the same configuration.
- the embodiment of the present invention is not limited to the above-described Embodiments 1 to 6, and various modifications can be made.
- the compressor 100 according to the embodiment of the present invention is a twin rotary type compressor having two cylindrical cylinders in the compression mechanism unit 3, but may be a single rotary type compressor.
- Embodiment 7 FIG.
- the compressor 100 according to Embodiment 7 of the present invention is formed by integrally forming a cylindrical cylinder and a closing member that closes the end surface of the cylindrical cylinder, and is an enlarged vane sliding groove.
- the compressor 100 according to Embodiment 7 of the present invention will be described. Parts having the same configuration as those of the compressors of FIGS. 1 to 13 are denoted by the same reference numerals and description thereof is omitted.
- FIG. 14 is a schematic view of the compression mechanism section of the compressor according to Embodiment 7 of the present invention, taken along the line FF in FIG.
- the compressor 100 according to Embodiment 7 of the present invention has an integrated cylinder 34c in which a first cylindrical cylinder 34a and a main bearing 32 are integrally molded.
- an end surface portion 34c2 shown in FIG. 14 is an end surface portion on the motor portion 2 side of the outer wall portion 34c1 having a thickness in the axial direction of the rotating shaft 31.
- the ceiling surface part 40a2 shown in FIG. 14 is a wall part which forms the surface at the side of the chamber 40a of the outer wall part 34c1.
- the first vane sliding groove 41a is formed in the radial direction.
- the first vane sliding groove 41a is formed in a rectangular shape in a cross section with respect to the radial direction of the integrated cylinder 34c.
- the first vane sliding groove 41a is formed such that the axial direction of the rotary shaft 31 is the longitudinal direction in a rectangular cross section.
- a lower wall surface portion 41a1 one of the longitudinal wall surfaces is referred to as a lower wall surface portion 41a1
- the other is referred to as an upper wall surface portion 41a2.
- the lower wall surface portion 41a1 forms the same plane as the bottom surface portion 40a1 of the chamber 40a formed in the integrated cylinder 34c without any step.
- a recess 34c4 is formed in the ceiling surface portion 40a2 of the outer wall portion 34c1 so as to be recessed in the axial direction of the rotary shaft 31 from the chamber 40a side.
- the recessed part 34c4 is a hollow and does not penetrate the outer wall part 34c1.
- the recess 34c4 is formed to be continuous with the first vane sliding groove 41a.
- the bottom wall portion 34c5 serving as the bottom wall of the recess 34c4 and the upper wall surface portion 41a2 of the first vane sliding groove 41a form the same plane without a step.
- the distance W1 between the side wall parts 34c6 which the recessed part 34c4 opposes is the same as the distance W2 between the side wall parts 41a3 used as the transversal direction of the 1st vane sliding groove 41a.
- the side wall part 34c6 of the recess 34c4 and the side wall part 41a3 of the first vane sliding groove 41a are formed on the same plane without a step.
- the first vane sliding groove 41a has a distance h2 between the lower wall surface portion 41a1 and the upper wall surface portion 41a2 of the first vane sliding groove 41a so that the bottom surface portion 40a1 of the chamber 40a formed in the integrated cylinder 34c. And the dimension of the distance h1 between the ceiling surface portion 40a2 and the ceiling surface portion 40a2.
- the first vane sliding groove 41a has a distance h2 between the lower wall surface portion 41a1 and the upper wall surface portion 41a2 of the first vane sliding groove 41a so that the bottom surface portion of the chamber formed in the integrated cylinder 34c. It is formed smaller than the dimension of the distance h3 between 40a1 and the end face part 34c2 of the integrated cylinder 34c.
- the compressor using R1234yf refrigerant or propane is a refrigerant having a low operating pressure. Therefore, the compressor using R1234yf refrigerant or propane has a lower gas pressure on the back side of the vane due to a decrease in operating pressure than a compressor using R32 refrigerant or R410A refrigerant conventionally used. There is.
- a vane separation phenomenon in which the vane does not follow the rolling piston may occur. When the vane separation phenomenon occurs, the high-pressure refrigerant leaks to the low-pressure side, and the compressor performance deteriorates.
- the vane separation phenomenon can be suppressed by forming the vane and the vane sliding groove large and increasing the gas load.
- the enlargement of the vane sliding groove causes a decrease in the rigidity of the cylinder, and the compressor performance and reliability may be reduced due to the distortion of the cylinder.
- a cylindrical cylinder and a closing member that closes an end surface of the cylindrical cylinder are integrally formed.
- the first vane sliding groove 41a is such that the distance h2 between the lower wall surface portion 41a1 and the upper wall surface portion 41a2 of the first vane sliding groove 41a is the bottom surface of the chamber 40a formed in the integrated cylinder 34c. It is formed larger than the dimension of the distance h1 between the portion 40a1 and the ceiling surface portion 40a2.
- the first vane sliding groove 41a has a distance h2 between the lower wall surface portion 41a1 and the upper wall surface portion 41a2 between the bottom surface portion 40a1 and the cylinder end surface portion 34c2. Is formed smaller than the distance h3.
- the compressor can form a vane and a vane sliding groove largely using the axial outer wall part 34c1 of the integrated cylinder 34c.
- the vane separation phenomenon can be suppressed, the cylinder rigidity can be secured, and the compressor performance and reliability can be secured.
- the embodiment of the present invention is not limited to the first to seventh embodiments, and various modifications can be made.
- the structural relationship between the first vane sliding groove 41a and the integrated cylinder 34c may be applied to the structural relationship between the second vane sliding groove 41b and the integrated cylinder 34c.
- the end surface portion 34c2 is an end surface portion on the opposite side of the motor portion 2 of the outer wall portion having a thickness in the axial direction in the second cylindrical cylinder 34b.
Abstract
Description
図1は、本発明の実施の形態1に係る圧縮機の内部を示す内部構成図である。以下の説明において、圧縮機として、圧縮機構部に2つの円筒シリンダを有するツインロータリー式の圧縮機100を例に説明する。図1に示すように、圧縮機100は、密閉容器1と、密閉容器1の内部に、電動機部2と、圧縮機構部3とを備えた、密閉型の電動圧縮機である。
実施の形態1では、圧縮機100の動作冷媒は、ハイドロフルオロオレフィンの1種であるR1234yfを単体冷媒として用いることを説明した。本発明の実施の形態2に係る圧縮機では、圧縮機100に用いる他の動作冷媒について説明する。
本発明の実施の形態1に係る圧縮機100は、第1の円筒シリンダ34aと主軸受32とが別部品で成形され、組み立てられることで圧縮機構部3を構成した場合を示した。本発明の実施の形態3に係る圧縮機100は、回転軸31の軸方向において、円筒シリンダと、円筒シリンダの端面を閉塞する閉塞部材とを一体成形したものである。以下、本発明の実施の形態3に係る圧縮機100について説明する。なお、図1~図6の圧縮機と同一の構成を有する部位には同一の符号を付してその説明を省略する。
本発明の実施の形態4に係る圧縮機100は、円筒シリンダと円筒シリンダの端面を閉塞する閉塞部材とを一体成形したものであると共に、吸入ポートの径を拡大したものである。以下、本発明の実施の形態4に係る圧縮機100について説明する。なお、図1~図10の圧縮機と同一の構成を有する部位には同一の符号を付してその説明を省略する。
図12は、本発明の実施の形態5に係る圧縮機の圧縮機構部の部分的な平面概略図である。以下、本発明の実施の形態5に係る圧縮機100について説明する。図12において、矢印は室40aに流入する冷媒の流れを示すものである。なお、図1~図11の圧縮機と同一の構成を有する部位には同一の符号を付してその説明を省略する。
図13は、本発明の実施の形態6に係る圧縮機の圧縮機構部の部分的な平面概略図である。以下、本発明の実施の形態6に係る圧縮機100について説明する。なお、図1~図12の圧縮機と同一の構成を有する部位には同一の符号を付してその説明を省略する。
本発明の実施の形態7に係る圧縮機100は、円筒シリンダと円筒シリンダの端面を閉塞する閉塞部材とを一体成形したものであると共に、ベーン摺動溝を拡大したものである。以下、本発明の実施の形態7に係る圧縮機100について説明する。なお、図1~図13の圧縮機と同一の構成を有する部位には同一の符号を付してその説明を省略する。
Claims (14)
- 密閉容器と、
前記密閉容器に収容され、前記密閉容器内に流入する冷媒を圧縮する圧縮機構部と、
を備え、
前記圧縮機構部には、冷媒を吸入するための吸入ポートが設けられており、
前記吸入ポートの直径d[m]と、前記圧縮機構部のストロークボリュームVst[m3]との関係が、
5・10-6<Vst<9・(d-4・10-3)・10-3+1・10-5
の関係を満足するように構成されている圧縮機。 - R1234yfの単体冷媒を動作冷媒とし、
前記圧縮機構部のストロークボリュームVst[m3]が、
9.8・10-6<Vst<108・10-6
の範囲内に設定されている請求項1に記載の圧縮機。 - プロパンの単体冷媒を動作冷媒とし、
前記圧縮機構部のストロークボリュームVst[m3]が、
8.4・10-6<Vst<92・10-6
の範囲内に設定されている請求項1に記載の圧縮機。 - R32とR1234yfとを含む2種の混合冷媒を動作冷媒とし、
前記圧縮機構部のストロークボリュームVst[m3]が、下記の条件(1)~(5)のいずれか1つの範囲内に設定されている請求項1に記載の圧縮機。
(1)R32冷媒及びR1234yf冷媒が、R32:R1234yf=1:99~20:80の割合[wt%]で含まれている場合に、
9.8・10-6<Vst<97.4・10-6
(2)R32冷媒及びR1234yf冷媒が、R32:R1234yf=21:79~40:60の割合[wt%]で含まれている場合に、
8.9・10-6<Vst<86.8・10-6
(3)R32冷媒及びR1234yf冷媒が、R32:R1234yf=41:59~60:40の割合[wt%]で含まれている場合に、
7.9・10-6<Vst<76.2・10-6
(4)R32冷媒及びR1234yf冷媒が、R32:R1234yf=61:39~80:20の割合[wt%]で含まれている場合に、
6.9・10-6<Vst<65.6・10-6
(5)R32冷媒及びR1234yf冷媒が、R32:R1234yf=81:19~99:1の割合[wt%]で含まれている場合に、
6.0・10-6<Vst<55.5・10-6 - R32とR1234yfとR1123とを含む3種の混合冷媒を動作冷媒とし、
R32冷媒と、R1234yf冷媒と、R1123冷媒とが、R32:R1234yf:R1123=50~70:20~40:1~20の割合[wt%]で含まれている場合に、
前記圧縮機構部のストロークボリュームVst[m3]が、
6.2・10-6<Vst<60.6・10-6
の範囲内に設定されている請求項1に記載の圧縮機。 - 前記吸入ポートの通路断面が円形状に形成されているとき、
前記吸入ポートの直径d[m]の寸法は、前記通路断面の断面積S[m2]と、前記吸入ポートの直径d[m]とにより、
d=2√(S/π)
で定義される請求項1~5のいずれか1項に記載の圧縮機。 - 前記吸入ポートの通路断面が円形以外の形状で形成されているとき、
前記吸入ポートの直径d[m]の寸法は、前記通路断面の断面積S[m2]と、前記吸入ポートの濡れ縁長さL[m]とにより、水力直径として、
d=4S/L
で定義される請求項1~5のいずれか1項に記載の圧縮機。 - 前記圧縮機構部は、円筒シリンダと、前記円筒シリンダの端面を閉塞する閉塞部材と、が一体成形されている一体型シリンダを有する請求項1~7のいずれか1項に記載の圧縮機。
- 前記吸入ポートの直径r1の寸法が、前記一体型シリンダに形成された室の底面と天井面との間の距離h1の寸法よりも大きく形成されている請求項8に記載の圧縮機。
- 前記一体型シリンダにはベーン摺動溝が形成されており、前記ベーン摺動溝の下壁面部と上壁面部との間の距離h2が、前記一体型シリンダに形成された室の底面部と天井面部との間の距離h1の寸法よりも大きく形成され、かつ、前記一体型シリンダに形成された室の底面部と前記一体型シリンダの端面部との間の距離h3の寸法よりも小さく形成されている請求項8又は9に記載の圧縮機。
- 前記吸入ポートの入口部における入口部断面積、若しくは、前記吸入ポートの出口部における出口部断面積が、前記吸入ポート内の経路部における経路部断面積よりも大きく形成されている請求項1~10のいずれか1項に記載の圧縮機。
- 前記吸入ポートの入口部若しくは出口部の形状が、円若しくは楕円状に形成されていると共に、前記吸入ポート内の経路部の形状が、円若しくは楕円状に形成されており、
前記吸入ポートの入口部若しくは出口部の断面と、前記吸入ポート内の経路部の断面とが同心円に形成されている請求項1~11のいずれか1項に記載の圧縮機。 - 動作冷媒としてR32を含み、GWPが500未満である動作冷媒を用いた請求項1~12のいずれか1項に記載の圧縮機。
- GWPが100未満である動作冷媒を用いた請求項1~13のいずれか1項に記載の圧縮機。
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JP2019500093A JPWO2018150494A1 (ja) | 2017-02-15 | 2017-02-15 | 圧縮機 |
PCT/JP2017/005568 WO2018150494A1 (ja) | 2017-02-15 | 2017-02-15 | 圧縮機 |
KR1020197015738A KR20190072635A (ko) | 2017-02-15 | 2017-02-15 | 압축기 |
CN201780080277.1A CN110249131A (zh) | 2017-02-15 | 2017-02-15 | 压缩机 |
CZ2019-522A CZ2019522A3 (cs) | 2017-02-15 | 2017-02-15 | Kompresor |
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Cited By (2)
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US20210041151A1 (en) * | 2017-12-19 | 2021-02-11 | Green Refrigeration Equipment Engineering Research Center Of Zhuhai Gree Co., Ltd. | Air-conditioning system and air conditioner having same |
WO2022004895A1 (ja) * | 2020-07-03 | 2022-01-06 | ダイキン工業株式会社 | 圧縮機における冷媒としての使用、圧縮機、および、冷凍サイクル装置 |
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