WO2005124156A1 - Multi-cylinder rorary compressor - Google Patents
Multi-cylinder rorary compressor Download PDFInfo
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- WO2005124156A1 WO2005124156A1 PCT/JP2005/010588 JP2005010588W WO2005124156A1 WO 2005124156 A1 WO2005124156 A1 WO 2005124156A1 JP 2005010588 W JP2005010588 W JP 2005010588W WO 2005124156 A1 WO2005124156 A1 WO 2005124156A1
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- Prior art keywords
- eccentric
- cylinder
- compression mechanism
- roller
- portions
- 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
- 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
- F04C18/3562—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 the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
- F04C18/3564—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 the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
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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
- 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
-
- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- 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
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
- F04C29/0057—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions for eccentric movement
-
- 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
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/601—Shaft flexion
Definitions
- the present invention relates to a multi-cylinder rotary compressor that constitutes, for example, a refrigeration cycle of a refrigeration apparatus and has three or more sets of compressor units in the axial direction.
- an eccentric roller is accommodated in a cylinder chamber formed in an inner diameter portion of a cylinder (cylinder), and a blade is provided in the cylinder.
- a chamber is provided and the blade is slidably housed.
- the leading edge of the blade is pressed and urged by a compression spring so as to elastically abut against the peripheral surface of the eccentric roller, and the cylinder chamber is divided by the blade into a suction chamber and a compression chamber.
- the rotating shaft used in this type of multi-cylinder rotary compressor has a longer shaft length than the rotating shafts used in single-cylinder and two-cylinder type compressors.
- the lower end and the substantially middle part of the rotary shaft are supported by bearings, and three or more eccentric parts are provided integrally between these bearings, and eccentric rollers are fitted to each.
- the rotary compressor has an accumulator on the suction side, and is communicated through a suction passage.
- the rotary compressor includes a sealed case, a motor portion housed in the sealed case, a compression mechanism portion to which the suction pipe is directly connected, and a rotating shaft connecting the motor portion and the compression mechanism portion. Be composed.
- the above-described multi-cylinder rotary compressor has the following problems.
- Each eccentric portion and eccentric roller are accommodated in a cylinder chamber formed in the cylinder inner diameter portion and eccentrically rotate.
- the eccentric portion and the eccentric roller have a smaller distance between bearings that support the rotating shaft. Becomes large, and the rotation shaft itself is likely to run out.
- R410A which is a mixture of two types of HFCs, R32 and R125, tends to be frequently used.
- This type of refrigerant has characteristics suitable for a refrigeration cycle, such as low pressure loss and high thermal conductivity as a pseudo-azeotropic refrigerant mixture.
- R410A the gas load is large, and the gas load is circulated through the refrigeration cycle by the discharge pressure of the refrigerant gas compressed and discharged by the compressor. It is determined by the difference from the suction pressure when sucked into the compressor again.
- FIG. 19 schematically illustrates a configuration of a compression assembly including a plurality of compression mechanisms in a multi-cylinder rotary compressor, and schematically illustrates a state of a rotating shaft connected to an electric motor (not shown). Is shown in
- the main bearing d is located at the uppermost end of the figure, and the sub-bearing e is located at the lowermost end.
- Three sets of compression bearings are provided at a predetermined interval between the main bearing d and the sub-bearing e.
- Three eccentric rollers g1, g2, and g3, which are mechanical units, are interposed.
- a solid line perpendicular to the vertical direction indicates the rotation axis h, and the eccentric rollers gl to g3 are fitted to an eccentric part (not shown) provided on the rotation axis h.
- the rotation axis h shown by a solid line is curved and deformed as shown by a two-dot chain line in the figure, and is positioned with respect to the upper end dl and the lower end d2 of the main bearing d and the upper end el and the lower end e2 of the sub-bearing e.
- Rotation axes h are mutually lined Contact, and a partial load called so-called extreme pressure is applied. Therefore, galling is likely to occur between the rotating shaft h and the main bearing d and the sub bearing e, so that the abrasion increases and the compression efficiency is reduced.
- a suction passage communicating from the accumulator to each compression mechanism of the compressor is composed of a total of three independent suction pipes. For this reason, the above accumulator cannot connect each suction pipe unless it is made larger than an accumulator connected to a single-cylinder or two-cylinder type compressor, which is disadvantageous due to an increase in component costs.
- suction pipes are connected to the accumulator, and one of the suction pipes is branched into two in the middle, and a total of three suction pipes are used to make each cylinder chamber of the compressor. It is conceivable to have a configuration that communicates with.
- the work of first fitting the eccentric roller to the eccentric portion provided integrally with the rotary shaft is performed. is necessary.
- the eccentric rollers of the first compression mechanism portion and the third compression mechanism portion on both sides can be fitted to the eccentric portion by rotating the rotating shaft vertically or inverted and interposing from the end.
- the first compression mechanism or the third compression mechanism Insert the eccentric roller from the compression mechanism side and pass through the eccentric part of each compression mechanism
- the eccentric portions are provided with the phase shifted by 120 °, the eccentric roller to be fitted is changed by changing the position of the eccentric roller after passing through one eccentric portion. It is necessary to match the direction.
- an eccentric roller fitted to the eccentric portion of the second compression mechanism is divided into two parts in the radial direction, and the eccentric part is divided into eccentric parts divided from both left and right sides. It is conceivable that the rollers are fitted in and assembled via an assembly member.
- the present invention has been made on the basis of the above circumstances, and a first object is to connect three or more sets of compression mechanism units to a rotating shaft, with the rotation of the rotating shaft,
- the aim is to provide a multi-cylinder rotary compressor that reduces whirling of the rotating shaft and improves compression efficiency.
- the second object is to simplify the suction passage while maintaining the refrigerating capacity, on the premise that three or more sets of compression mechanisms are connected to the rotating shaft.
- a third object is to presuppose that three or more sets of compression mechanisms are connected to the rotating shaft, and particularly to assemble and fit the roller to the eccentric portion of the rotating shaft, to divide the roller.
- the present invention aims to provide a multi-cylinder rotary compressor that can reduce the distance between the eccentric portions as much as possible and improve the assemblability and reliability and the compression efficiency.
- the multi-cylinder rotary compressor of the present invention includes, in a closed case, a rotary shaft supported by a bearing, an electric motor portion connected to the rotary shaft, and
- the compression mechanism unit includes a cylinder chamber in which an eccentric portion provided on the rotating shaft and a roller fitted in the eccentric portion are eccentrically rotatable and a cylinder chamber. And a blade provided on this cylinder, the leading edge of which abuts against the peripheral surface of the roller to divide the cylinder chamber into two, and at least one of the clearances of each sliding part in each compression mechanism. Is set larger in the compression mechanism part not in contact with the bearing than in the compression mechanism part in contact with the bearing.
- the multi-cylinder rotary compressor of the present invention constitutes a refrigeration cycle, connects an accumulator via a suction passage, and includes a rotating shaft and a rotating shaft in a sealed case. It accommodates an electric motor unit connected to the shaft and three or more sets of compression mechanism units.Each compression mechanism unit accommodates three or more eccentric parts provided integrally with the rotary shaft and eccentrically rotatable rollers.
- At least two eccentric parts have the same eccentric direction, and the suction passages that communicate the cylinder chambers accommodating the eccentric parts with the same eccentric direction and the accumulator share a part with each other.
- the multi-cylinder rotary compressor of the present invention includes, in a closed case, a rotary shaft, a motor unit connected to the rotary shaft, and three or more sets of compression mechanism units.
- Each compression mechanism section includes a cylinder chamber for eccentrically rotatably housing a roller fitted with three or more eccentric sections provided integrally with the rotating shaft, a cylinder having this cylinder chamber, The leading edge of the cylinder abuts against the peripheral surface of the roller, and the cylinder chamber is divided into the suction chamber and the compression chamber. Equipped with a separating blade and an intermediate partition plate interposed between the cylinders, where N is the number of compression mechanisms and (N-1) is the eccentricity between the eccentric parts (N-1).
- the gap between the eccentric portions is formed to be larger than the axial length of the roller, and the thickness of the intermediate partition plate interposed between the eccentric portions is set to be less than the axial length of the roller.
- the distance between the eccentric portions at the remaining places is formed to be less than the axial length of the roller, and the thickness of the intermediate partition plate interposed between the eccentric parts is less than the distance between the eccentric portions at the remaining places.
- FIG. 1 is a longitudinal sectional view of a multi-cylinder rotary compressor according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional plan view of a compression mechanism according to an embodiment of the multi-cylinder rotary compressor.
- FIG. 3 is an explanatory diagram showing a relationship between a cylinder and a height of an eccentric roller, for explaining a clearance setting of a compression mechanism unit according to the embodiment.
- FIG. 4 is a front view of a rotating shaft for explaining a clearance setting of a further different compression mechanism according to the embodiment.
- FIG. 5 is a vertical cross-sectional view of a compression assembly for explaining a clearance setting of a different compression mechanism according to the embodiment.
- FIG. 6A is a plan view and a cross-sectional view showing one portion of an eccentric roller for explaining a clearance setting of a different compression mechanism according to the embodiment.
- FIG. 6B is a plan view and a sectional view showing another part of the eccentric roller for explaining a clearance setting of a different compression mechanism according to the embodiment.
- FIG. 7A is a cross-sectional plan view of first and third compression mechanism units for describing a clearance setting of still another compression mechanism unit according to the embodiment.
- FIG. 7B is a cross-sectional plan view of the second compression mechanism section for explaining a clearance setting of still another compression mechanism section according to the embodiment.
- FIG. 8 is a longitudinal sectional view of a compression assembly for explaining the same clearance setting of the compression mechanism as in FIGS. 7A and 7B according to the embodiment.
- FIG. 9 is a longitudinal sectional view of a multi-cylinder rotary compressor according to a second embodiment of the present invention.
- FIG. 10 is a vertical cross-sectional view of a multi-cylinder rotary compressor according to a third embodiment of the present invention, with a part of the rotary compressor omitted.
- FIG. 11 is a vertical cross-sectional view of a multi-cylinder rotary compressor according to a fourth embodiment of the present invention, with a part of the rotary compressor omitted.
- FIG. 12 is a vertical cross-sectional view of a multi-cylinder rotary compressor according to a fifth embodiment of the present invention, with a part of the rotary compressor omitted.
- FIG. 13A is a sectional view of an eccentric roller according to a sixth embodiment of the present invention.
- FIG. 13B is a front view of a rotation shaft according to a sixth embodiment of the present invention.
- FIG. 14 is a longitudinal sectional view of a compression assembly of the multi-cylinder rotary compressor according to the embodiment.
- FIG. 15A is a plan view of a first cylinder according to a seventh embodiment of the present invention.
- FIG. 15B is a plan view of a second cylinder according to a seventh embodiment of the present invention.
- FIG. 15C is a plan view of a third cylinder according to a seventh embodiment of the present invention.
- FIG. 16 is a plan view and a partial side view of a second cylinder according to an eighth embodiment of the present invention.
- FIG. 17 is a plan view illustrating first to third eccentric portion structures according to a ninth embodiment of the present invention.
- FIG. 18 is a longitudinal sectional view of a multi-cylinder rotary compressor according to a tenth embodiment of the present invention.
- FIG. 19 is a schematic configuration diagram of a compression mechanism portion and a diagram illustrating a deformed state of a rotating shaft according to a conventional example.
- FIG. 1 is a longitudinal sectional view showing the internal structure of a multi-cylinder rotary compressor ⁇ constituting a refrigeration cycle of a refrigeration system, for example.
- reference numeral 1 denotes a sealed case, and a plurality of compression mechanism units described later, here, a first compression mechanism unit 2A and a second compression mechanism unit 2B , And a third compression mechanism section 2C, and a motor section 3 is provided above the compression mechanism assembly.
- the electric motor section 3 and the first to third compression mechanism sections 2A to 2C constituting the compression mechanism assembly 2 are connected to each other via a rotary shaft 4.
- the electric motor unit 3 is composed of a stator 5 fixed to the inner surface of the sealed case 1 and a rotor 6 disposed inside the stator 5 with a predetermined gap therebetween and having the rotating shaft 4 interposed therebetween. Be composed.
- the motor unit 3 is connected to an inverter that varies the operating frequency via a power supply unit 3a, and is electrically connected to a control unit (both not shown) that controls the motor unit 3 from the inverter.
- the first compression mechanism 2A, the second compression mechanism 2B, and the third compression mechanism 2C are respectively connected to the first cylinder 8A, the second cylinder 8B, and the intermediate partition 7A, 7B via the intermediate partition plates 7A, 7B. It has a third cylinder 8B.
- One of the first to third cylinders 8A to 8C, for example, the first cylinder 8A is press-fitted into the inner peripheral surface of the sealed case 1 and is positioned and fixed by welding from the outside of the sealed case 1. You.
- the main bearing 9 is superimposed on the upper surface of the first cylinder 8A, and is mounted and fixed to the cylinder 8A via mounting bolts 10 together with the valve cover a.
- An auxiliary bearing 11 is superimposed on the lower surface of the third cylinder 8C, and is mounted and fixed to the first cylinder 8A via mounting bolts 12 together with the valve cover b, the intermediate partition plates 7A, 7B and the second cylinder 8B.
- the rotating shaft 4 is rotatably supported at its middle and lower ends by a main bearing 9 and a sub-bearing 11.
- the rotating shaft 4 penetrates the inside of the first to third cylinders 8A to 8C, and integrally has three eccentric portions 4a, 4b, 4c formed in order with a phase difference of about 120 °.
- the eccentric portions 4a to 4c are assembled so as to be located in the inner diameter portions of the cylinders 8A to 8C, and the eccentric rollers 13a, 13b, and 13c are fitted to the respective peripheral surfaces.
- the first cylinder 8A is divided into upper and lower surfaces by a main bearing 9 and an intermediate partition plate 7, and has an inner diameter portion.
- a first cylinder chamber 14a is formed.
- the upper and lower surfaces of the second cylinder 8A are defined by an intermediate partition plate 7A and an intermediate partition plate 7B, and a second cylinder chamber 14b is formed in the inner diameter portion.
- the upper and lower surfaces of the third cylinder 8C are defined by an intermediate partition plate 7B and an auxiliary bearing 11, and a third cylinder chamber 14c is formed in the inner diameter portion.
- These cylinder chambers 14a to 14c are formed to have the same diameter as each other, and eccentric rollers 13a to 13c are eccentrically rotatably accommodated in the respective cylinder chambers.
- FIG. 2 is a schematic plan cross-sectional view of the first compression mechanism 2A constituting the compression assembly 2.
- the first cylinder 8A is provided with a blade chamber 22a communicating with the cylinder chamber 14a.
- the blade chamber 22a houses the blade 15a so as to be able to protrude and retract from the cylinder chamber 14a.
- FIG. 1 shows only the blade 15a.
- the blade chamber 22a is provided with a blade accommodating groove 23a in which both sides of the blade 15a are slidably movable, and a vertical hole portion integrally provided with an end of the blade accommodating groove and accommodating the rear end of the blade 15a. 24a.
- a spring member 26 is housed in the blade chamber 22a.
- the spring member 26 is a compression spring that is interposed on the back side of the blade 15a, applies an elastic force (back pressure) to the blade 15a, and brings the leading edge into contact with the eccentric roller 13a.
- the tip edge of the blade 15a is formed in a semicircular shape in plan view, and can make line contact with the peripheral wall of the eccentric roller 13a regardless of the rotation angle of the eccentric roller.
- the blade 15a reciprocates along the blade accommodating groove 23a, and the blade rear end can freely protrude and retract into the vertical hole 24a.
- a semicircular discharge notch 27 is provided near the blade accommodating groove 23a in the first cylinder 8A.
- the second and third cylinders 8B and 8C also have holes corresponding to the discharge holes, and each of them has a discharge valve mechanism. Further, a suction hole 28 is provided on the opposite side of the discharge hole 27 via the blade accommodating groove 23a and faces the cylinder chamber 14a from the outer peripheral surface of the first cylinder 8A. Tube 29a is connected.
- the first and second compression mechanism sections 2A and 2C configured in this manner are denoted by the reference numerals corresponding to the corresponding parts, and description thereof is omitted. That's right.
- a discharge pipe 18 is connected to the upper end of the sealed case 1.
- the discharge pipe 18 is connected to a condenser constituting a refrigeration cycle together with the compressor T, and an accumulator 19 via an expansion mechanism and an evaporator.
- Suction pipes 29a, 29b, and 29c are connected to the bottom of the accumulator 19, and the suction pipes 29a to 29c pass through the sealed case 1 and the first to third cylinders 8A to 8C to form the first to third cylinders.
- the direct communication between the third cylinder chambers 14a to 14c is also as described above.
- control unit When an operation start signal is input to the control unit from a remote controller (remote control panel) or the like (not shown), the control unit sends an operation signal to the motor unit 3 via the inverter.
- the rotation shaft 4 is driven to rotate, and the eccentric rollers 13a to 13c together with the eccentric portions 4a to 4c perform eccentric rotation in each of the cylinder chambers 14a to 14c.
- the blades 15a to 15c are always elastically pressed and urged by the spring members 26, respectively, so that the leading edges of the blades slide on the peripheral walls of the eccentric rollers 13a to 13c. Then, the inside of the first to third cylinder chambers 14a to 14c is divided into a suction chamber and a compression chamber.
- the cylinder chambers 14a to 14c of the eccentric rollers 13a to 13c are aligned with the inner circumferential surface rolling contact positions and the blade housing grooves 23a to 23c, and the blades 15a to 15c are retracted most. Space capacity is maximized.
- the refrigerant gas is sucked from the accumulator 19 via the suction pipes 29a to 29c into the respective cylinder chambers 14a to 14c, and is filled.
- the high-pressure gas is discharged into the sealed case 1 via the valve covers a and b, filled, and discharged from the discharge pipe 18 above the sealed case.
- the high-pressure gas is also guided by the compressor T in the order of the condenser, the expansion mechanism, and the evaporator.
- the high-pressure gas evaporates in the evaporator to perform a refrigeration operation, and then is guided to the accumulator 19 to be separated into gas and liquid.
- the multi-cylinder rotary compressor T of the present invention includes a motor unit 3 and a first compression mechanism connected to the motor unit 3 and the rotating shaft 4 in the sealed case 1.
- the first cylinder 8A is provided with cylinder chambers 14a to 14c in which the eccentric rollers 13a to 13c are eccentrically and rotatably accommodated.
- a third cylinder 8C and blades 15a to 15c having a leading edge abutting on the peripheral surface of the eccentric roller and bisecting the cylinder chamber along the rotation direction of the eccentric roller are provided.
- the clearance of at least one of the sliding parts is the second compression mechanism part 2B which does not contact the main bearing 9 or the sub-bearing 11.
- it is characterized in that it is set larger than the first compression mechanism 2A and the third compression mechanism 2C that are in contact with the main bearing 9 or the sub-bearing 11.
- the clearance of the predetermined sliding part in the second compression mechanism part 2B is larger than the clearance of the corresponding sliding part of the other compression mechanism parts 2A, 2C.
- the side clearance Sa between the inner peripheral portion of the cylinder 8B (the peripheral surface of the cylinder chamber 14b) and the peripheral surface of the eccentric roller 13b in the second compression mechanism 2B is increased by the first and third compression mechanisms.
- the side clearance Sb between the inner surfaces of the cylinders 8A and 8C (the peripheral surfaces of the cylinder chambers 14a and 14c) and the peripheral surfaces of the eccentric rollers 13a and 13c in the mechanical units 2A and 2C is set to be larger (Sa> Sb).
- FIG. 3 is a diagram illustrating the height dimensions of the cylinder and the eccentric roller.
- the height clearance Sc which is the difference between the height of the cylinder 8B in the second compression mechanism 2B and the height of the eccentric roller 13b, is increased by the cylinders in the first and third compression mechanisms 2A and 2C.
- the height clearance is set to be larger than the height clearance Sd (Sc> Sd), which is the difference between the height of 8A and 8C and the height of the eccentric rollers 13a and 13c.
- the eccentric roller 13b which is larger than the whirling of the other eccentric portions 4a, 4c, is inclined more than the eccentric rollers 13a, 13c.
- the height clearance Sc is set to be larger than the height clearance Sd, it is difficult for the intermediate partition plates 7A and 7B to make one-side contact, and reliability is particularly high under conditions of high compression load. The property can be improved.
- FIG. 4 is a front view of the rotating shaft 4.
- the eccentric amount Sf of the eccentric portion 4b constituting the second compression mechanism portion 2B is equal to the first and third compression mechanism portions 2.
- the eccentric amounts Se, Sg of the eccentric portions 4a, 4c constituting A, 2C are set to be smaller (Sf ⁇ Sg, Se).
- the eccentric roller 13b fitted here does not easily come into contact with the peripheral surface of the cylinder chamber 14b, so that the reliability can be improved.
- the amount of eccentricity of the eccentric portion is reduced, the outer diameter of the roller increases, and the gas load acting on the outer peripheral surface of the roller increases. Therefore, in this configuration, the effect of the centrifugal force on the gas load is larger. It is most suitable when a refrigerant having a small gas load, for example, Rl 34a is used.
- FIG. 5 is a longitudinal sectional view of the compression assembly.
- the height H2 of the cylinder 8B in the second compression mechanism 2B is smaller than the height HI, H3 of the cylinders 8A, 8C in the first and third compression mechanisms 2A, 2C (H2 HI, H3).
- the height dimension force of the eccentric roller 13b accommodated in the second cylinder chamber 14b is formed smaller than the height dimension of the eccentric rollers 13a, 13c accommodated in the first and third cylinder chambers 14a, 14c. Will be done.
- FIGS. 6A and 6B are a plan view and a sectional view of an eccentric roller 13b used in the second compression mechanism 2B.
- the eccentric roller 13bl shown in FIG. 6A is a hole j in which the upper and lower ends of the inner diameter are fitted into the eccentric portion 4b, and a step portion having a larger diameter than the hole at the center between the holes. k is provided. Therefore, the weight is reduced as compared with the eccentric rollers 13a and 13c provided in the first and third compression mechanism sections 2A and 2C, each of which is simply a hole.
- the eccentric roller 13b2 shown in FIG. 6B has a hole j at the center portion to be fitted to the eccentric portion 4b, and a step k having a diameter larger than the hole at both upper and lower ends. Therefore, the weight can be reduced as compared with the eccentric rollers 13a, 13c provided in the first and third compression mechanism portions 2A, 2C, each of which is simply a hole.
- the whirling of the eccentric roller 13b caused by the rotation of the rotary shaft 4 due to the compression reaction force or the like in the second compression mechanism 2B not in contact with the bearings 9 and 11 It tends to be larger than the whirling of the other eccentric rollers 13a and 13c.
- the weight of the eccentric roller 13b is set to be smaller than the weight of the eccentric rollers 13a and 13c, the centrifugal force is reduced, the whirling of the rotating shaft 4 is reduced, and the load on the main bearing 9 and the auxiliary bearing 11 is reduced. The load is reduced and reliability is improved.
- the eccentric rollers 13a to 13c used in each of the compression mechanism units 2A to 2C have all the same shape and size, and the eccentric rollers 13b of the second compression mechanism unit 2B
- the material having a specific gravity smaller than that of the material of the eccentric rollers 13a and 13c provided in the first and third compression mechanisms 2A and 2C may be selected.
- the mass of the eccentric roller 13b of the second compression mechanism 2B becomes smaller than the mass of the eccentric rollers 13a, 13c provided in the first and third compression mechanism 2A, 2C.
- the same operation and effect as described can be obtained.
- FIG. 7A is a cross-sectional plan view of first and third compression mechanism units 2A and 2C
- FIG. 7B is a cross-sectional plan view of second compression mechanism unit 2B
- FIG. 8 is first to third compression mechanism units. It is a longitudinal cross-sectional view of 2A-2C.
- the eccentric amount E2 of the eccentric portion 4b provided on the rotating shaft 4 in the second compression mechanism portion 2B is determined by the eccentric portions 4a, 4c provided on the rotating shaft 4 in the first and third compression mechanism portions 2A, 2C.
- E2 the deviation El and E3
- the outer diameter of the eccentric roller 13b in the second compression mechanism 2B is the first diameter.
- the mass force of the eccentric roller 13b becomes smaller than the mass of the eccentric rollers 13a and 13c.
- the centrifugal force generated by the eccentric portion 4b and the eccentric roller 13b increases.
- a gas load has a greater effect, in other words, when a refrigerant with a large gas load, for example, R41OA is used.
- the first to third compression mechanisms 2A to 2C are provided.
- the present invention is not limited to this, and the multi-cylinder rotary compression having a greater number of compression mechanisms is provided. Needless to say, the present invention can also be applied to machines.
- FIG. 9 is a longitudinal sectional view showing the internal structure of a multi-cylinder rotary compressor TO constituting a refrigeration cycle of a refrigeration apparatus, for example, in the second embodiment.
- reference numeral 101 denotes a sealed case, and a plurality of compression mechanism units described later, here, a first compression mechanism unit 102A and a second compression mechanism unit 102B , And a third compression mechanism unit 102C, and a motor unit 103 is provided above the compression mechanism assembly.
- the electric motor unit 103 and the first to third compression mechanism units 102A to 102C constituting the compression mechanism assembly 102 are connected to each other via a rotating shaft 104.
- the electric motor unit 103 includes a stator 105 fixed to the inner surface of the sealed case 101, a rotor 106 arranged with a predetermined gap inside the stator 105, and a rotating shaft 104 interposed therebetween. And power are also composed.
- the motor unit 103 is connected to an inverter that varies the operating frequency via a power supply unit 103a, and is electrically connected to a control unit that controls the motor unit 103 from the inverter. .
- An intermediate partition 107A is provided between the first compression mechanism 102A and the second compression mechanism 102B. Is interposed.
- An intermediate partition plate 107B is interposed between the second compression mechanism 102B and the third compression mechanism 102C.
- Each of the compression mechanism sections 102A to 102C includes a first cylinder 108A, a second cylinder 108B, and a third cylinder 108C.
- a main bearing 109 is superimposed on the upper surface of the first cylinder 108A, and is fixed to the cylinder 108A via a fixing bolt 110 together with the valve cover a.
- An auxiliary bearing 111 is superimposed on the lower surface of the third cylinder 108C, and the first cylinder 108A is attached to the valve cover b, the intermediate partition plates 107A and 107B and the second cylinder 108B via the mounting bonolet 112. Attached and fixed.
- the rotating shaft 104 is rotatably supported at its middle and lower ends by the main bearing 109 and the sub-bearing 111.
- the rotating shaft 104 penetrates the inside of the first to third cylinders 108A to 108C, and includes three first eccentric portions 104a and a second eccentric portion which are formed by a phase difference described later.
- 104b and the third eccentric part 104c are provided integrally.
- the center portion and the second and third eccentric portions 104b and 104c provided at the lowermost portion are identical to each other and are eccentric.
- the eccentric direction is different from that of the portion 104a by 180 °. That is, when the rotating shaft 104 is provided with three eccentric portions 104a to 104c, the eccentric directions of the two eccentric portions 104b and 104c are the same.
- the eccentric portions 104a to 104c of the rotating shaft 104 are assembled so as to be located in the inner diameter portions of the cylinders 108A to 108C, and the eccentric rollers 113a, 113b, and 113c are fitted on the respective peripheral surfaces. Therefore, the eccentric directions of the eccentric rollers 113b and 113c are set to be identical to each other with respect to the eccentric direction of the eccentric roller 113a, and are set to eccentric directions different from the eccentric roller 113a by 180 °.
- the first cylinder 108A is divided into upper and lower surfaces by a main bearing 109 and an intermediate partition plate 107A, and a first cylinder chamber 114a is formed in an inner diameter portion.
- the upper and lower surfaces of the second cylinder 108B are defined by an intermediate partition plate 107A and an intermediate partition plate 107B, and a second cylinder chamber 114b is formed in the inner diameter portion.
- the third cylinder 108C is divided into upper and lower surfaces by an intermediate partition plate 107B and an auxiliary bearing 111, and a third cylinder chamber 114c is formed in the inner diameter portion.
- These cylinder chambers 114a to 114c have the same diameter and the same axial length.
- the eccentric rollers 113a to 113c each having a height dimension that is the same axial length are housed eccentrically rotatable.
- the second and third eccentric portions 104b and 104c have the same eccentric direction, and have a phase difference of 180 ° with the first eccentric portion 104a. The same relationship is always maintained in the positions of the eccentric rollers 113a to: 113c in the cylinder chambers 114a to 114c.
- the clearance of at least one of the sliding portions is the second compression mechanism portion not in contact with the main bearing 109 or the auxiliary bearing 111.
- 102B is set larger than the first compression mechanism 102A and the third compression mechanism 102C that are in contact with the main bearing 109 or the sub-bearing 111.
- first compression mechanism 102A to the third compression mechanism 102C all have the same configuration, only the first compression mechanism 102A will be described, and the second and third compression mechanisms 102A will be described. A description of the compressor components 102B and 102C is omitted.
- the first cylinder 108A is provided with a blade chamber 115 communicating with the first cylinder chamber 114a.
- a blade 116 is accommodated so as to be able to protrude and retract from the cylinder chamber 114a, and a spring member 117 is accommodated therein.
- the spring member 117 is a compression spring that is provided on the back side of the blade 116 and applies an elastic force (back pressure) to the blade 116 to bring the leading edge into contact with the eccentric roller 113a.
- the tip edge of the blade 116 is formed in a semicircular shape in plan view, and can make line contact with the peripheral wall of the eccentric roller 113a regardless of the rotation angle of the eccentric roller.
- the blade 116 reciprocates in the blade chamber 115.
- a discharge notch (not shown) is provided in first cylinder 108A, and a discharge valve mechanism is accommodated in main bearing 109 portion facing this discharge notch. Further, the first cylinder 108A is provided with a suction hole facing the cylinder chamber 114a from the outer peripheral surface, and a suction pipe 118a penetrating through the sealing case 101 is connected to the suction hole.
- the cylinders 108B and 108C constituting the second and third compression mechanisms 102B and 102C are also provided with a discharge valve mechanism, and provided with a suction hole (not shown) facing the cylinder chamber 114a from the outer peripheral surface.
- Each of the suction holes has a suction pipe 1 18b and 118c are connected.
- a discharge pipe 120 is connected to the upper end of the sealed case 101.
- An accumulator 121 is connected to the discharge pipe 120 via a condenser constituting a refrigeration cycle together with the compressor TO, and an expansion mechanism and an evaporator (hereinafter, not shown).
- a suction pipe 118a and a suction pipe 118c extend from the bottom of the accumulator 121. As described above, these suction pipes 118a and 118c penetrate the sealed case 101 and directly communicate with the cylinder chambers 114a and 114c of the first cylinder 108A and the third cylinder 108C. As described above, the suction pipe 118b is branched from a middle portion of the suction pipe 118c and penetrates through the sealed case 101 to directly communicate with the cylinder chamber 114b of the second cylinder 108B. These suction pipes 118a to 118c form a suction passage 118 that communicates between the accumulator 121 and the multi-cylinder rotary compressor TO.
- the control unit When an operation start signal is input to the control unit from a remote controller (remote control panel) (not shown) or the like, the control unit sends an operation signal to the motor unit 103 via the inverter.
- the rotating shaft 104 is driven to rotate, and the eccentric rollers 113a to 113c together with the eccentric portions 104a to 104c perform eccentric rotation in each of the cylinder chambers 114a to 114c.
- the refrigerant gas is supplied from the accumulator 121 via the suction pipes 118a to 118c. Then, each cylinder chamber 114a to 114c is sucked and filled.
- first to third compression mechanism sections 102A to 102C since the blade 116 is constantly elastically pressed and urged by the spring member 117, the leading edge of the blade 116 comes into sliding contact with the peripheral walls of the eccentric rollers 113a to 113c.
- the inside of the first to third cylinder chambers 114a to 114c is divided into a suction chamber and a compression chamber.
- Eccentric rollers 113a to 113c With the eccentric rotation of 113c, the rolling contact positions of the eccentric rollers with respect to the inner peripheral surfaces of cylinder chambers 114a to 114c move, and the volume of the compression chamber defined by the cylinder chamber decreases. Therefore, the gas previously guided to the cylinder chambers 114a to 114c is gradually compressed. The rotating shaft 104 is continuously rotated, and the compression chambers in the respective cylinder chambers 114a to 114c are formed. The volume is further reduced and the gas is compressed. When the gas pressure rises to the specified pressure, the discharge valve mechanism opens.
- the high-pressure gas is led from the compressor TO in the order of the condenser, the expansion mechanism, and the evaporator.
- the high-pressure gas is evaporated by the evaporator to perform a refrigeration operation, and then is led to the accumulator 121 to be separated into gas and liquid.
- the low-pressure vaporized refrigerant separated into gas and liquid is led out of the accumulator 121, guided to the cylinder chambers 114a to 114c via the suction pipes 118a to 118c forming the suction passage 118, and circulated through the above-described path again. .
- the multi-cylinder rotary compressor TO of the present invention includes a motor unit 103 in a closed case 101, and a first compressor connected to the motor unit 103 via a rotating shaft 104.
- a mechanism unit 102A to a third compression mechanism unit 102C are housed therein.
- Each of the compression mechanism units 102A to 102C includes a first cylinder 108A to a third cylinder 108A including first to third cylinder chambers 114a to 114c in which eccentric rollers 113a to 113c are accommodated in eccentric rotation.
- a cylinder 108C and a blade 116 having a leading edge abutting on the peripheral surface of the eccentric roller and bisecting the cylinder chamber along the rotation direction of the eccentric roller are provided.
- the first eccentric portion 104a and the eccentric roller 113a accommodated in the cylinder chamber 114a of the first cylinder 108A are moved relative to the cylinder chambers 114b and 114c of the second and third cylinder chambers 108B and 108C.
- the second and third eccentric portions 104b and 104c and the eccentric rollers 113b and 113c, which are two eccentric portions accommodated in the eccentric portion, are aligned in the same eccentric direction, and the eccentric portion 104a and the eccentric roller 113a are aligned.
- the suction pipes 118b and 118c that form the suction passage 118 are formed so as to share a part with each other.
- a cylinder accommodating a pair of eccentric portions 104b and 104c having the same eccentric direction. Since the compression strokes are performed at exactly the same timing in the chambers 114b and 114c, the suction pipes 118b and 118c constituting the suction passage 118 can be shared with each other, and a decrease in the refrigerating capacity can be prevented. Further, since two suction pipes 118a and 118c may be connected to the accumulator 121, the size and simplification of the accumulator can be obtained.
- FIG. 10 is a cross-sectional view of the multi-cylinder rotary compressor T1 according to the third embodiment, in which a part of the rotary compressor T1 is omitted.
- the same components as those in the second embodiment described above are denoted by the same reference numerals, and a new description will be omitted. Only different portions will be described.
- the first and second eccentric portions 104a and the eccentric rollers 113a accommodated in the cylinder chamber 114a of the first cylinder 108A also have the cylinder chambers 11 of the second and third cylinder chambers 108B and 108C.
- the second and third eccentric portions 104b and 104c and the eccentric rollers 113b and 113c which are two eccentric portions accommodated in the eccentric portions 104b and 114c, are aligned in the same eccentric direction.
- the rollers 113a are set to have a phase difference of 180 ° from each other.
- the clearance of at least one of the sliding parts is the second compression mechanism part 102B that does not contact the main bearing 109 or the sub-bearing 111.
- the force is set larger than the first compression mechanism 102A and the third compression mechanism 102C that are in contact with the main bearing 109 or the auxiliary bearing 111.
- suction pipe 118a and suction pipe 118c are connected to the bottom of accumulator 121, and penetrate through sealed case 101 to connect to cylinder chambers 114a, 114c of first and third cylinders 108A, 108C, respectively. Is done.
- a guide passage 118d made of, for example, a pipe is provided between the second cylinder 108B and the third cylinder 108C via the lower intermediate partition plate 107B, and a second cylinder chamber is provided. Refrigerant gas can be guided between 114b and the third cylinder chamber 114c. Therefore, here, the suction pipes 118a and 118c and the guide passage 118d constitute the suction passage 118A.
- the suction passage 118A communicates with the second and third cylinder chambers 114b and 114c accommodating the second and third eccentric portions 104b and 104c having the same eccentric direction and the accumulator 121.
- the suction pipe 118c and the guide passage 118d are formed so as to partially share each other.
- the two eccentric portions 104b and 104c have the same eccentric direction.
- Multi-cylinder rotary compressor Tl When the rotating shaft 104 is driven to rotate, the cylinder chamber 114b and the cylinder chamber 114c perform the compression stroke at exactly the same time as the rotating shaft 104 rotates, so that a part of the suction passage 118A is formed in common. To prevent a decrease in refrigeration capacity.
- FIG. 11 is a cross-sectional view of a multi-cylinder rotary compressor T2 according to a fourth embodiment, in which a part of the rotary compressor T2 is omitted.
- the first eccentric portion 104a and the eccentric roller 113a housed in the cylinder chamber 114a of the first cylinder 108A are housed in the cylinder chambers 114b and 114c of the second and third cylinder chambers 108B and 108C.
- the two eccentric portions 104b and 104c and the eccentric rollers 113b and 113c are aligned in the same eccentric direction, and the eccentric portion 104a and the eccentric roller 113a are set to have a phase difference of 180 ° from each other. Is unchanged.
- suction pipes 118a and 118c are connected to the bottom of the accumulator 121, and each penetrates the sealed case 101.
- the suction pipe 118a is connected to the cylinder chamber 114a of the first cylinder 108A.
- the suction pipe 118c is connected to a suction hole 118e provided in the intermediate partition 107B.
- the suction hole 118e is branched in a vertical direction at a position where it does not reach the inner diameter of the intermediate partition plate 107B.
- the cylinders 108B and 108C are provided with suction guide paths 118f communicating with the suction holes 118e and opening to the respective cylinder chambers 114b and 114c.
- the refrigerant gas guided to the suction pipe 118c is transferred from the suction hole 118e of the intermediate partition plate 107B to the second cylinder chamber 114b and the third cylinder chamber 114c through the suction guide path 118f.
- the refrigerant gas can be guided.
- the suction pipes 118a and 118c, the suction hole 118e, and the suction guide passage 118f constitute a suction passage 118B.
- the second and third eccentric portions 104b and 104c accommodating the same eccentric direction are accommodated in the second and third eccentric portions 104b and 104c, respectively.
- the suction pipe 118c, the suction hole 118e, and the suction guide path 118f as the suction passage 118B that communicates the third cylinder chambers 114b, 114c and the accumulator 121 are formed so as to be partially shared with each other.
- the clearance of at least one of the sliding portions is the second compression mechanism portion that is not in contact with the main bearing 109 or the sub bearing 111.
- 102B is set larger than the first compression mechanism 102A and the third compression mechanism 102C that are in contact with the main bearing 109 or the sub-bearing 111.
- the two eccentric portions 104b and 104c are the multi-cylinder rotary compressor T2 in which the eccentric directions are the same.
- the compression stroke is performed at exactly the same time in the cylinder chamber 114b and the cylinder chamber 114c with the rotation of the rotating shaft 104, so that a part of the suction passage 118B is shared. To prevent a decrease in refrigeration capacity.
- FIG. 12 is a cross-sectional view of a multi-cylinder rotary compressor according to a fifth embodiment with a part thereof omitted.
- the rotation provided with the four eccentric portions 104a to 104d is provided.
- a multi-cylinder rotary compressor T3 with a shaft 104 is shown.
- the first compression mechanism 102A to the fourth compression mechanism 102D are connected to the rotating shaft 104 along the axial direction. As before, there is a first compression mechanism 102A at the top, second and third compression mechanisms 102B and 102C below, and a fourth compression mechanism at the bottom. There is a part 102D to constitute the compression assembly 102.
- the clearance of at least one of the sliding portions is the second compression mechanism portion that is not in contact with the main bearing 109 or the auxiliary bearing 111.
- 102B is the first compression mechanism 10 in contact with the main bearing 109 or the sub-bearing 111. It is set larger than 2A and the fourth compression mechanism section 102D.
- the first and second eccentric portions 104a and 104b and the eccentric rollers 113a and 113b which are two eccentric portions accommodated in the cylinder chambers 114a and 114b of the first and second cylinder chambers 108A and 108B, They are aligned in the same eccentric direction.
- the third and fourth eccentric portions 104c and 104d which are two eccentric portions accommodated in the cylinder chambers 114c and 114d of the third and fourth cylinder chambers 108C and 108D, and the eccentric rollers 113c and 113d, They are aligned in the same eccentric direction.
- the first and second eccentric portions 104a and 104b and the eccentric rollers 113a and 113b and the third and fourth eccentric portions 104c and 104d and the eccentric rollers 113c and 113d have a phase difference of 180 ° with each other. Is set.
- suction pipes 118a and 118c are connected to the bottom of the accumulator 121, and each penetrates the sealed case 101.
- the suction pipe 118a is connected to a suction hole 118g provided in the intermediate partition plate 107A.
- the suction hole 118g is branched in the vertical direction at a position where it does not reach the inner diameter of the intermediate partition plate 107A.
- the cylinders 108A and 108B are provided with suction guide paths 118h communicating with the suction holes 118g and opening to the respective cylinder chambers 114a and the cylinder chambers 114b.
- the suction pipe 118c is connected to a suction hole 118i provided in the intermediate partition 107C.
- the suction hole 118i does not reach the inner diameter of the intermediate partition plate 107C, but branches upward and downward at the position.
- the cylinder 108C and the cylinder 108D are provided with suction guide paths 11 ⁇ communicating with the suction holes 118i and opening to the respective cylinder chambers 114c and 114d.
- the suction pipe 118a, the suction hole 118g which connects the first and second cylinder chambers 114a, 114b accommodating the two eccentric portions 104a, 104b having the same eccentric direction to the accumulator 121
- the suction guide path 118h is formed as a part of the suction path 118C in common with the suction path 118C.
- a suction pipe 118c, a suction hole 118i, and a suction guide path 118j that communicate the third and fourth cylinder chambers 114c, 114d accommodating two eccentric portions 104c, 104d having the same eccentric direction and the accumulator 121 are provided.
- the suction passages 118C are formed so as to partially share each other.
- the eccentric portions 104a, 104b and the eccentric portions 104c, 104d are the multi-cylinder rotary compressor T3 in which the eccentric directions are the same, and the rotary shaft 104 is rotationally driven. Then, the cylinder chambers 114a and 114b and the cylinder chambers 114c and 114d perform the compression strokes at the same timing, respectively, due to the rotation of the rotating wheel, so that a part of the suction passage 118B is formed in common. And prevent a decrease in refrigeration capacity.
- FIG. 13A is a cross-sectional view of an eccentric roller used in a multi-cylinder rotary compressor according to a sixth embodiment
- FIG. 13B is a front view of a rotary shaft
- FIG. It is sectional drawing of the compression assembly provided with the rotating shaft.
- the clearance of at least one of the sliding parts is the second compression mechanism part 102B that does not contact the main bearing 109 or the sub-bearing 111.
- the force is set larger than the first compression mechanism 102A and the third compression mechanism 102C that are in contact with the main bearing 109 or the auxiliary bearing 111.
- the inner diameter and outer diameter of the eccentric rollers 113a, 113b, and 113c are all the same, and the height E, which is the axial length, is also all the same. You. Further, as shown in FIG. 13B, all the eccentric portions 104a to 104c provided integrally with the rotary shaft 104 have the same axial length. Therefore, if one type of eccentric roller is manufactured, there is no problem even if any one of the eccentric portions 104a to 104c is fitted.
- one of the features of the rotating shaft 104 is that the distance between the eccentric portions 104a to 104c differs depending on the portion. That is, the first compression mechanism 102A The distance between the eccentric portion 104a corresponding to the second compression mechanism portion 102B and the eccentric portion 104b corresponding to the second compression mechanism portion 102B is A1, the eccentric portion 104b corresponding to the second compression mechanism portion 102B, and the third compressor. If the distance between the eccentric portion 104c and the corresponding eccentric portion 104c is A2, A2 is set to be larger than A1 (A2> A1).
- the spacing dimension A2 is greater than the eccentric roller height dimension E (A2> E).
- the spacing dimension A1 is eccentric. It is set smaller than the roller height dimension E (E> A1).
- the eccentric rollers 113a to 113c are attached to the eccentric portions 104a to 104c.
- Assembly work for fitting 113c can be performed smoothly. That is, in order to fit the eccentric roller 113a into the first eccentric portion 104a, the eccentric roller 113a is displaced from the right end of the rotating shaft 104 shown in FIG. It is only necessary to shift the position in accordance with the eccentric direction at the position facing the, and fit it.
- eccentric rollers 113a to 113c are all formed in the same size and shape and can be fitted to any eccentric part, the eccentric roller 113a once fitted to the first eccentric part 104a is moved as it is, Attempting to fit the second eccentric 104b is not possible.
- the eccentric roller 113a is Cannot be interposed between the eccentric portion 104a and the second eccentric portion 104b (A1 dimension range), and cannot be fitted to the second eccentric portion 104b.
- the eccentric roller 113b is displaced from the left end of the rotating shaft 104 via the eccentric roller, and is opposed to the third eccentric portion 104c. Shift the position according to the eccentric direction.
- the eccentric roller 113b is fitted to the third eccentric portion 104c, and is further pressed to get over the eccentric portion. Once the eccentric roller 113b is The eccentric roller 113b is fitted to the eccentric portion 104b after being positioned between the portion 104c and the second eccentric portion 104b and further displaced in accordance with the eccentric direction of the second eccentric portion 104b.
- the distance A2 between the second eccentric portion 104b and the third eccentric portion 104c is set to be larger than the height E of the eccentric roller 113b.
- the eccentric roller 113b is positioned between the 104c and the second eccentric portion 104b, and then the position thereof is shifted.
- the eccentric roller 113b is fitted to the third eccentric part 104c from the left end of the rotating shaft 104 via another eccentric roller 113c.
- the eccentric roller 113b can be fitted and assembled to the central eccentric portion 104b without being divided. Therefore, it is possible to provide a multi-cylinder rotary compressor having high reliability and high compression efficiency.
- FIG. 14 is a diagram illustrating the relationship between the setting conditions of FIGS. 13A and 13B and the thickness of the intermediate partition plates 107A and 107B. That is, the thickness dimension HI of the intermediate partition plate 107A interposed between the first cylinder 108A and the second cylinder 108B is the distance dimension A1 between the first eccentric portion 104a and the second eccentric portion 104b. It is formed smaller (HI and A1). As described above, the distance A1 between the first eccentric portion 104a and the second eccentric portion 104b is set smaller (A1 ⁇ B) than the height E of the eccentric rollers 113a to 113c. Therefore, the setting condition of the intermediate partition plate thickness dimension HI ⁇ spacing dimension A1 ⁇ eccentric roller height dimension E will be derived.
- the distance A1 between the remaining eccentric portions 104a_104b is formed to be less than the height E of the eccentric rollers 113a to 113c, and the thickness HI of the intermediate partition plate 107A interposed between the eccentric portions. Is set to be less than the distance A1 between the eccentric portions 104a_104b at the remaining positions.
- the thickness of the intermediate partition plates 107A and 107B can be made thinner, and the distance between the eccentric portions 104a_104b and 104b_104c can be further reduced.
- the distance between the main bearing 109 and the sub-bearing 111 that support the rotating shaft 104 can be reduced, and whirling can be suppressed to improve reliability and compression efficiency.
- the first to third compression mechanisms 102A to 102C are provided, but the present invention is not limited to this.
- the first to third compression mechanisms as described above with reference to FIG. The present invention can be applied to a multi-cylinder rotary compressor T3 provided with the mechanical units 102A to 102D, and also to a multi-cylinder rotary compressor provided with a greater number of compression mechanism units.
- the compressor structure 102A to 102D force 3 ⁇ 4 group N
- the eccentric portions are located 104a to 104b, 104b.
- the interval between the first eccentric portion 104a and the second eccentric portion 104b and the interval between the third eccentric portion 104c and the fourth eccentric portion 104d are set to the same interval dimension A2, and the second If the distance between the eccentric part and the third eccentric part is the distance A1, and the height E of the eccentric rollers 113a to 113d is E, the distance: A2> the height of the eccentric roller: E> the distance: A1 It becomes. [0140]
- the eccentric roller 113b fitted to the second eccentric portion 104b is allowed to pass through the first eccentric portion 104a, and the eccentric roller 113c fitted to the third eccentric portion 104c is What is necessary is just to let the eccentric part 104d of 4 pass. Therefore, it is possible to assemble the eccentric portions 104a to 104d without using divided eccentric rollers, and to provide a multi-cylinder rotary compressor having high reliability and high compression efficiency.
- the compression mechanism units 102A to 102D are four sets: N compressor T3, and there are three eccentric parts: (N-1), two eccentric parts 104a_ 104b, 104c-104d spacing dimension: A2 is formed larger than eccentric rollers 113a-: 113d height dimension: E, and thickness of intermediate partition plate 107B interposed between these eccentric parts.
- the dimension H2 was set to be less than the height dimension E of the eccentric roller.
- the thickness HI of the intermediate partition plate 107A interposed between the remaining eccentric portions 104b_104c is set to be smaller than the interval A1 between the remaining eccentric portions 104b_104c.
- FIG. 15 is a plan view of a cylinder according to the seventh embodiment.
- FIG. 15A is a plan view of the first cylinder 108A
- FIG. 15B is a plan view of the second cylinder 108B
- FIG. 15C is a plan view of the third cylinder 108C.
- the blade chamber 115, the discharge notch 30, and the suction hole 140 are formed at the same position and the same size and shape at the same diameter from the same central axis. .
- FIG. 16 is a plan view of a cylinder according to the eighth embodiment.
- a concave portion 145 is provided on a side surface of the cylinder 108, and a discharge valve mechanism 146 is accommodated therein.
- the second cylinder 108B constituting the second compression mechanism unit 102B at the center is provided.
- the second compression mechanism unit 102B and the second compression mechanism unit 102C forming the inner second compression mechanism unit 102C are included.
- the first cylinder 108B and the third cylinder 108C are used.
- FIG. 17 is a plan view of the rotation shaft according to the ninth embodiment.
- the first to third eccentric portions 104a to 104c provided integrally with the rotating shaft 104 have a structure in which the first and third eccentric portions 104a to 104c are equidistant from each other. That is, the second eccentric portion 104b is eccentrically provided at a position shifted by 120 ° with respect to the first eccentric portion 104a, and the third eccentric portion 104c is further eccentrically provided at a position shifted by 120 °.
- the second eccentric portion 104b is eccentrically provided at a position shifted by 120 ° with respect to the first eccentric portion 104a
- the third eccentric portion 104c is further eccentrically provided at a position shifted by 120 °.
- FIG. 18 is a longitudinal sectional view of a multi-cylinder rotary compressor in the tenth embodiment.
- the eccentric portions 104a and 104c constituting the first compression mechanism unit 102A and the third compression mechanism unit 102C are identical to each other.
- the eccentric portion 104b is provided in the direction and is eccentric by the same amount, and the eccentric portion 104b constituting the second compression mechanism portion 102B is eccentric in the opposite direction.
- the one suction pipe 118c and the branch suction pipe 118a connected to the accumulator 121 guide the low-pressure evaporated refrigerant to the cylinder chambers 114a and 114c having the same rotation angle. A decrease in capacity can be prevented, and the size and simplification of the accumulator 121 can be obtained.
- the present invention is not limited to this, and further includes a multi-cylinder type having a five-cylinder type or more cylinders. It goes without saying that it can be applied to all types of rotary compressors.
- the present invention is a multi-cylinder rotary compressor in which three or more sets of compression mechanisms are connected to a rotary shaft, compression of the rotary shaft due to rotation of the rotary shaft is reduced by reducing rotation of the rotary shaft. If the efficiency is improved, the effect will be obtained.
Abstract
Description
Claims
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US7748968B2 (en) * | 2007-04-27 | 2010-07-06 | Fujitsu General Limited | Two-cylinder rotary compressor with suction pipes |
JP2010156497A (en) * | 2008-12-26 | 2010-07-15 | Daikin Ind Ltd | Refrigerating device |
CN104251211A (en) * | 2013-06-28 | 2014-12-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor |
US20160018136A1 (en) * | 2013-03-26 | 2016-01-21 | Toshiba Carrier Corporation | Multiple cylinder rotary compressor and refrigeration cycle apparatus |
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WO2019142408A1 (en) * | 2018-01-18 | 2019-07-25 | 東芝キヤリア株式会社 | Compressor and refrigeration cycle device |
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Also Published As
Publication number | Publication date |
---|---|
KR20070030189A (en) | 2007-03-15 |
JPWO2005124156A1 (en) | 2008-04-10 |
KR100805465B1 (en) | 2008-02-20 |
JP4594302B2 (en) | 2010-12-08 |
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