WO2013175566A1 - 冷媒圧縮機および冷凍サイクル機器 - Google Patents
冷媒圧縮機および冷凍サイクル機器 Download PDFInfo
- Publication number
- WO2013175566A1 WO2013175566A1 PCT/JP2012/063013 JP2012063013W WO2013175566A1 WO 2013175566 A1 WO2013175566 A1 WO 2013175566A1 JP 2012063013 W JP2012063013 W JP 2012063013W WO 2013175566 A1 WO2013175566 A1 WO 2013175566A1
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- WIPO (PCT)
- Prior art keywords
- refrigerant
- motor
- sealed container
- cover
- compression mechanism
- 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
- 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
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
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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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0096—Heating; Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/02—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C2/025—Rotary-piston machines or pumps of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents the moving and the stationary member having co-operating elements in spiral form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
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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
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/045—Heating; Cooling; Heat insulation of the electric motor in 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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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
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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
Definitions
- the present invention relates to a refrigerant compressor and a refrigeration cycle device, and in particular, a low-pressure chamber type refrigerant compressor having a compression mechanism that sucks and compresses the refrigerant in the sealed container after the refrigerant is sucked into the sealed container, and It relates to refrigeration cycle equipment.
- a high-pressure chamber type refrigerant compressor in which the pressure in the hermetic container becomes the refrigerant discharge pressure as a refrigerant compressor in which the compressor mechanism that compresses the refrigerant and the motor that drives the compressor mechanism are housed in the hermetic container.
- the compressor mechanism that compresses the refrigerant and the motor that drives the compressor mechanism are housed in the hermetic container.
- the coil temperature of the motor rises.
- a motor using a general ferrite magnet has a problem that the motor efficiency is lowered. .
- the low-pressure chamber type refrigerant compressor in which the pressure in the sealed container becomes the refrigerant suction pressure.
- the motor can be cooled by low-temperature and low-pressure suction refrigerant.
- the density of the refrigerant (gas) is reduced, so that the amount of refrigerant circulating through the refrigeration cycle is reduced, the refrigeration capacity is lowered, and the refrigeration is further reduced.
- the efficiency of the cycle also decreases. For this reason, the low-pressure chamber type refrigerant compressor employs a structure in which the sucked refrigerant is guided to the compression mechanism without being affected by the heat of the motor.
- Patent Document 1 Japanese Patent Application Laid-Open No. 63-50695
- Patent Document 1 states that “In the present invention, the inside of the sealed case 1 is partitioned by the compressor unit 5, the roller 6 of the compressor unit 5 and the rotor 4 of the motor unit 2.
- the suction pipe 20 is provided in the sealed case 1 facing the motor part 2 side of the through hole 16 along the axial direction in the shaft 15 that connects the two, and the suction hole 19 that receives the suction gas from the through hole 16 in the compressor part 5.
- the suction gas is guided to the compressor part 5 without touching the heat of the motor part 2 and separated from the gas and liquid, and then sucked into the cylinder chamber from the suction hole 19 (Patent Publication). (Refer to lines 5 to 14 in the lower right column on page 2.)
- Patent Document 2 Japanese Patent Laid-Open No. 9-236092 states that “the gist of the second invention is that refrigerant gas is sucked into a sealed housing containing a compression mechanism and its drive motor, and the compression is performed.
- a hermetic compressor for a refrigeration apparatus having a liquid injection circuit that sucks into the mechanism and injects a part of the liquid refrigerant into the compression chamber of the compression mechanism, the refrigerant gas is led directly to the compression mechanism through the refrigerant gas suction pipe.
- the liquid injection circuit is connected to the sealed housing at a position where the liquid is injected, and one of the liquid injection circuits is connected to a position where liquid refrigerant is injected toward the motor. (See paragraph [0015]).
- JP-A-63-50695 Japanese Patent Laid-Open No. 9-236092
- the present invention has been made in view of the above circumstances, and the object of the present invention is to prevent a decrease in the refrigerating capacity by preventing a decrease in the density of the refrigerant to be compressed sucked into the sealed container, An object of the present invention is to provide a refrigerant compressor and a refrigeration cycle apparatus that can improve motor efficiency by reducing the motor temperature, and that are low in cost, highly reliable, and highly efficient.
- a refrigerant compressor reflecting one aspect of the present invention includes a sealed container, a refrigerant contained in the sealed container, and the refrigerant in the sealed container after the refrigerant is sucked into the sealed container.
- a compression mechanism that sucks and compresses the air, a motor that is housed in the sealed container and drives the compression mechanism, a suction pipe for sucking refrigerant into the sealed container, and an outlet of the suction pipe.
- a refrigeration cycle device reflecting one aspect of the present invention is characterized in that the refrigerant compressor is provided as a refrigerant compressor for refrigeration or air conditioning.
- the present invention it is possible to prevent overheating of the refrigerant to be compressed that has been sucked into the sealed container, and to perform reliable gas-liquid separation of the sucked refrigerant, without making any special changes to the refrigeration cycle,
- the liquid refrigerant makes it possible to cool the winding that generates the largest amount of heat in the motor. That is, it is possible to prevent a decrease in the refrigerating capacity by preventing a decrease in the density of the refrigerant to be compressed sucked into the sealed container, and it is possible to improve the motor efficiency by reducing the motor temperature, and at a low cost.
- a highly reliable and highly efficient refrigerant compressor and refrigeration cycle equipment can be provided.
- FIG. 1 It is a longitudinal section showing the rotary compressor concerning a 1st embodiment of a refrigerant compressor of the present invention. It is a perspective view of the cover shown in FIG. 1, and its support structure. It is a longitudinal cross-sectional view which shows the rotary compressor which concerns on 2nd Embodiment of this invention. It is a perspective view of a cover in a rotary compressor concerning a 3rd embodiment of the present invention. It is a longitudinal cross-sectional view which shows the scroll compressor which concerns on 4th Embodiment of this invention.
- FIG. 1 is a longitudinal sectional view showing a rotary compressor 100 according to the first embodiment of the present invention.
- the refrigerant compressor of the present invention will be described by taking a low-pressure chamber type rotary compressor (rolling piston compressor) 100 in which the inside of a sealed container is a low-temperature and low-pressure intake gas space as an example.
- a refrigerant compressor in which the compression mechanism unit is disposed below the motor will be described.
- the rotary compressor 100 is a refrigerant compressor used for an air conditioner such as an air conditioner or a refrigeration air conditioner such as a refrigeration apparatus.
- the rotary compressor 100 has a sealed container 103 that forms a casing.
- a refrigerant is introduced into the sealed container 103 from a suction pipe 104 provided at an upper portion of the sealed container 103, and the inside of the sealed container 103 is a refrigerant.
- This is a low-pressure chamber type refrigerant compressor having a suction pressure of.
- a compression mechanism unit 101 is disposed below the sealed container 103, and a motor 102 that provides rotational power to the compression mechanism unit 101 is disposed above the sealed container 103.
- the compression mechanism unit 101 and the motor 102 are hermetically housed in the hermetic container 103.
- the motor 102 has a rotor 102a and a stator 102b.
- the stator 102 b is fixedly supported on the inner wall surface of the sealed container 103.
- the rotor 102 a is fixedly supported on the shaft 105. Then, by energizing the winding 126 wound around the slot portion (not shown) of the stator 102b, rotational power is applied to the rotor 102a.
- the compression mechanism unit 101 includes a cylinder 106, a roller 107, and a vane 108, and is a rotary type compression mechanism unit.
- the cylinder 106 is fixed to the lower side of the frame 109 fixedly supported on the inner wall surface of the sealed container 103.
- the roller 107 has a cylindrical shape, is rotatably fitted to the eccentric portion 105 a of the shaft 105, and moves eccentrically in the cylinder 106.
- the shaft 105 is rotatably supported by an upper bearing 110 provided on the frame 109 and a lower bearing 111 fixed to the lower side of the cylinder 106.
- the eccentric portion 105 a has an axis that is eccentric with respect to the axis of the portion supported by the upper bearing 110 and the lower bearing 111 of the shaft 105.
- the vane 108 is attached to the cylinder 106 so as to constantly contact and move with the outer peripheral surface of the roller 107.
- the vane 108 is always pressed against the outer peripheral surface of the roller 107 by the spring 112, and reciprocates in the cylinder 106 in accordance with the eccentric rotational movement of the roller 107.
- the vane 108 forms a compression chamber (not shown) inside the cylinder 106.
- the compression chamber communicates with a suction port (not shown) provided in the cylinder 106 and is formed below the lower bearing 111 via a discharge port (not shown) provided in the lower bearing 111. It communicates with the discharge chamber 113.
- the discharge port is provided with a discharge valve (not shown).
- a discharge pipe 114 extends from the discharge chamber 113 to the outside of the hermetic container 103 and communicates with an oil separator 115 provided on the side (side) of the rotary compressor 100.
- the refrigerant compressed by the compression mechanism unit 101 is discharged to the refrigeration cycle (not shown) through the oil separator 115.
- a cover 117 a is provided above the motor 102.
- the cover 117a has a shape in plan view that is larger than the outer diameter of the rotor 102a and has a circular shape having a diameter approximately equal to the diameter of the slot portion in which the winding 126 of the stator 102b is mounted. It has a shape (substantially hemispherical shell shape) that forms a part of a spherical surface that is convex upward.
- the cover 117a is provided so as to face the outlet of the suction pipe 104, and the liquid refrigerant among the refrigerants separated into gas and liquid by the refrigerant to be compressed sucked into the sealed container 103 colliding with the upper surface of the cover 117a. Is disposed at a position where it falls on the winding 126.
- FIG. 2 is a perspective view of the cover 117a and its support structure shown in FIG.
- the cover 117a is fixed to a ring-shaped support plate 117b fixedly supported on the inner wall surface of the sealed container 103 (see FIG. 1) by welding, screw fastening, or the like via a support leg 117c.
- the support plate 117b is provided with a plurality of gas holes 117d for improving the ventilation of the gas refrigerant.
- the rotary compressor 100 further includes a suction passage 118.
- One end of the suction passage 118 communicates with the upper part of the sealed container 103 above the cover 117 a, passes through the outside of the sealed container 103, and the other end is a suction port (not shown) provided in the cylinder 106. Connected to and communicated with.
- the refrigerant returned from the refrigeration cycle in a gas-liquid mixed state is guided into the sealed container 103 from the suction pipe 104.
- the refrigerant introduced into the sealed container 103 collides with the cover 117a.
- the liquid refrigerant having a high density flows outward along the upper surface of the substantially hemispherical cover 117a, flows downward from the outer peripheral edge, and is wound around the slot portion of the stator 102b. Of the wound winding 126, it falls onto the upper winding portion 126a located above the rotor 102a.
- the winding 126 of the stator 102b is cooled by the liquid refrigerant that has fallen from the outer peripheral edge of the cover 117a. Further, the liquid refrigerant passes through a gap between the outer periphery of the rotor 102a and the inner periphery of the stator 102b, and a refrigerant passage 122 provided between the outer periphery of the stator 102b and the inner wall surface of the hermetic container 103. It flows in the lower space located in the lower part. At this time, the liquid refrigerant cools the surfaces of the rotor 102 a and the stator 102 b and accumulates in a space located above the frame 109.
- the amount of heat generated by the motor 102 is determined by the loss of each part constituting the motor 102, and the largest loss is the loss of the winding 126 (so-called copper loss) mainly determined by the electric resistance of the conducting wire when energized. Therefore, by configuring the cover 117a so that the liquid refrigerant out of the refrigerant sucked from the suction pipe 104 falls onto the winding 126 of the stator 102b, the winding of the stator 102b that generates the largest amount of heat using the liquid refrigerant. 126 can be actively cooled. Thereby, the motor 102 can be effectively cooled.
- an oil return passage 125 is provided in the frame 109, and lubricating oil is passed through the oil return passage 125 from a space located above the frame 109 to a suction port (not shown) provided in the cylinder 106. It is returning.
- the low-density gas refrigerant stays in the upper space located above the stator 102b and is sucked into the inlet of the suction passage 118 disposed above the cover 117a.
- the gas refrigerant sucked into the inlet of the suction passage 118 flows into the compression mechanism unit 101 through the suction passage 118.
- the gas refrigerant to be compressed is supplied to the compression mechanism unit 101 with almost no thermal influence from the motor 102, that is, while suppressing the temperature rise of the gas refrigerant as much as possible.
- the refrigerant from the suction passage 118 forms a suction port (not shown) in a compression chamber (not shown) formed between the inner surface of the cylinder 106 and the outer surface of the roller 107 in the compression mechanism 101 and partitioned by the vane 108. It flows in through.
- the refrigerant that has flowed into the compression chamber is compressed by the roller 107 that rotates eccentrically by the rotation of the shaft 105, and when a predetermined discharge pressure is reached, a discharge valve (not shown) is opened and flows into the discharge chamber 113.
- the refrigerant that has flowed into the discharge chamber 113 flows into the oil separator 115 through the discharge pipe 114.
- the lubricating oil that has flowed out of the compression chamber together with the refrigerant is separated and recovered, and the refrigerant flows out to the refrigeration cycle.
- the collected lubricating oil is returned into the sealed container 103 through the oil return pipe 116.
- the rotary compressor 100 includes the sealed container 103, the compression mechanism unit 101 that is housed in the sealed container 103, and sucks and compresses the refrigerant sucked into the sealed container 103.
- the motor 102 that is housed in the sealed container 103 and drives the compression mechanism unit 101, the suction pipe 104 for sucking the refrigerant into the sealed container 103, and the outlet of the suction pipe 104 are provided opposite to the suction pipe 104.
- the cover 117a that causes the liquid refrigerant separated from the liquid that has been separated from the gas and liquid by colliding with the refrigerant that has been sucked in from the motor 102 to the winding 126 of the motor 102, and the gas refrigerant that has been separated from the liquid by being collided with the cover 117a.
- a suction passage 118 that leads to an inlet of a compression chamber provided in the compression mechanism unit 101.
- the air-fuel mixture is returned to the refrigerant compressor in a gas-liquid mixed state.
- the sucked refrigerant is separated into gas and liquid in the hermetic container 103, and the reliability is prevented from being lowered due to the suction of the liquid refrigerant into the compression mechanism 101.
- the separated gas refrigerant is guided to the compression mechanism unit 101 while suppressing overheating from the motor 102 as much as possible, and the separated liquid refrigerant is used for cooling the winding 126 of the stator 102b in the motor 102.
- the first embodiment it is possible to prevent overheating of the refrigerant to be compressed that has been sucked into the sealed container 103, and to perform reliable gas-liquid separation of the sucked refrigerant, which is a special change to the refrigeration cycle.
- the winding 126 having the largest heat generation amount in the motor 102 can be cooled by the liquid refrigerant without applying.
- the rotary compressor 100 can be provided as a low-cost, highly reliable, and highly efficient refrigerant compressor.
- the rotary compressor 100 has been described as an example. However, a similar configuration is possible even in a scroll compressor in which the compression mechanism is disposed below the motor. Applicable.
- FIG. 3 is a longitudinal sectional view showing a rotary compressor 100a according to the second embodiment of the present invention.
- a refrigerant compressor capable of cooling not only the upper winding 126a of the stator 102b but also the lower winding portion 126b of the stator 102b will be described.
- the low-pressure chamber type rotary compressor 100a will be described as an example.
- portions having the same functions as those of the rotary compressor 100 according to the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
- the main difference from the rotary compressor 100 according to the first embodiment is that a motor 102 called a skew motor in which a skew groove (groove) 102c is formed on the outer peripheral surface of the rotor 102a is used, and the rotor 102a.
- the disk (plate body) 121 is arranged below the point.
- the skew groove 102c twisted in the direction opposite to the rotation direction of the rotor 102a from the top to the bottom and continuously connected from the upper end to the lower end of the rotor 102a on the outer peripheral surface of the rotor 102a.
- the rotor 102a rotates counterclockwise as viewed from above.
- a disk 121 is provided below the rotor 102a.
- the disk 121 is fixed to the shaft 105 and is disposed at the same height as a part of the lower winding 126b positioned below the rotor 102a in the winding 126 wound around the slot portion of the stator 102b.
- a balance weight 123 for canceling the eccentric weight of the shaft 105 is integrally attached to the lower side of the disk 121.
- the operation of the second embodiment configured as described above will be described.
- the liquid refrigerant that has cooled the upper winding portion 126a of the stator 102b is accumulated on the stator 102b, and this liquid refrigerant is stored in the rotor.
- the skew groove 102c formed on the outer peripheral surface of 102a can be guided to the lower part of the rotor 102a.
- the liquid refrigerant can cool the outer peripheral surface of the rotor 102a and the inner peripheral surface of the stator 102b.
- the liquid refrigerant guided to the lower portion of the rotor 102a falls on the disk 121 and is splashed on the lower winding 126b of the stator 102b by the centrifugal force received on the rotating disk 121.
- the lower winding 126b of the stator 102b can be cooled with the liquid refrigerant, and the motor 102 can be further effectively cooled.
- the liquid refrigerant accumulated in the upper part of the stator 102b can be positively transferred to the lower part of the rotor 102a by the viscous pump effect by the skew groove 102c of the rotor 102a.
- the refrigerant path 122 (refer FIG. 1) provided between the outer periphery of the stator 102b and the inner wall face of the airtight container 103 can be abbreviate
- omitted a magnetic domain can be effectively formed in the steel plate constituting the stator 102b, and improvement in the efficiency of the motor 102 can be expected.
- the winding 126 of the stator 102b having a large calorific value in the motor 102 can be obtained in addition to the same effects as the first embodiment. Can be effectively cooled from above and below the stator 102b. Thereby, the operating temperature of the motor 102 can be further reduced, and a more efficient refrigerant compressor can be provided.
- vibration and noise can be reduced by using a skew motor having a skew groove 102c formed on the outer peripheral surface of the rotor 102a.
- a skew motor that forms a continuous skew groove cannot be used for the convenience of rotor manufacture
- stepped grooves are formed on the outer surface of the rotor.
- a pseudo skew motor having a portion that changes into a groove that is connected from the upper end to the lower end of the rotor 102a may be used. Or you may form a diagonal groove
- the magnet mounted on the rotor is parallel to the axial direction of the rotor.
- the same motor cooling effect can be obtained, so that a highly efficient refrigerant compressor can be provided. it can.
- the rotary compressor 100a has been described as an example in the same manner as in the first embodiment.
- the same configuration can be applied to a scroll compressor in which the compression mechanism is disposed below the motor. It is possible to apply the present invention.
- FIG. 4 is a perspective view of the cover 119 in the rotary compressor according to the third embodiment of the present invention.
- 3rd Embodiment demonstrates the example of the refrigerant compressor which can perform the gas-liquid separation of an inhalation refrigerant
- a cover structure 119 shown in FIG. 4 is used in place of the cover 117a and its support structure in the rotary compressors 100 and 100a according to the first and second embodiments described above. .
- the overlapping description is abbreviate
- the cover structure 119 includes a substantially hemispherical cover 119a and a ring-shaped support plate that is integrally provided with the cover 119a and is fixedly supported on the inner wall surface of the sealed container 103 (see FIG. 1).
- (Support) 119b that is, the cover 119a is integrally formed from a single plate material together with a support plate 119b for fixing and supporting the cover 119a.
- a plurality of liquid holes 119e for separating and dropping the liquid refrigerant are formed on the outer peripheral side of the cover 119a, and a plurality of gas holes 119f for improving the ventilation of the gas refrigerant are further formed on the outer peripheral side. ing.
- the above-described cover 119a includes one support plate 119b for fixing and supporting the cover 119a. Since it is possible to press-mold from a plate material, it becomes possible to perform gas-liquid separation with a lower cost configuration.
- FIG. 5 is a longitudinal sectional view showing a scroll compressor 200 according to the fourth embodiment of the present invention.
- the refrigerant compressor of the present invention will be described by taking as an example a low-pressure chamber type scroll compressor 200 in which the inside of a sealed container is a low-temperature and low-pressure suction gas space.
- a refrigerant compressor in which the compression mechanism is disposed above the motor will be described.
- the scroll compressor 200 is a refrigerant compressor used for refrigerating and air conditioning such as an air conditioner such as an air conditioner or a refrigerating apparatus.
- the scroll compressor 200 includes a sealed container 203 that forms a casing.
- the sealed container 203 is configured to suck a refrigerant into the sealed container 203 and to discharge the compressed refrigerant.
- the discharge pipe 214 is provided.
- a scroll-type compression mechanism 201 including a fixed scroll 230 and a turning scroll 231 that engages with the fixed scroll 230 and turns is arranged on the upper side in the sealed container 203.
- the fixed scroll 230 and the orbiting scroll 231 each have a spiral tooth shape portion.
- a motor 202 having a rotor 202a and a stator 202b is disposed below the sealed container 203.
- the compression mechanism unit 201 and the motor 202 are housed in a sealed container 203 in a sealed manner.
- the eccentric part 205a of the shaft 205 supported by the main bearing 210 provided on the frame 209 is inserted into the orbiting bearing 231a provided on the back surface (lower surface) of the orbiting scroll 231.
- the Oldham ring 232 disposed between the orbiting scroll 231 and the frame 209 restrains the rotation of the orbiting scroll 231 when the shaft 205 rotates, and causes the orbiting scroll 231 to perform the orbiting movement.
- the suction pipe 204 is for taking in the refrigerant gas, and communicates with the inside of the sealed container 203.
- the discharge pipe 214 is for discharging compressed refrigerant gas to the outside, and communicates with a discharge chamber 213 provided in the upper part of the fixed scroll 230.
- a bearing support plate 233 is disposed below the motor 202.
- the auxiliary bearing 234 provided on the bearing support plate 233 supports the shaft 205 rotatably together with the main bearing 210 provided on the frame 209.
- a cover 217 is provided above the motor 202.
- the cover 217 has, for example, a cylindrical shape having a diameter that is larger than the outer diameter of the rotor 202a and is approximately the same as the diameter of a slot portion (not shown) in which the winding 226 of the stator 202b is mounted.
- the cover 217 is provided so as to face the outlet of the suction pipe 204, and the suction refrigerant to be compressed sucked into the sealed container 203 collides with the side surface of the cylindrical cover 217 and is separated from the gas and liquid.
- the liquid refrigerant is placed at a position where it falls onto the winding 226.
- the cover 217 is fixed to the frame 209 by, for example, screw fastening.
- the suction passage 218 is formed inside the frame 209, one end communicates with the upper part of the sealed container 203 above the cover 217, and the other end is connected to and communicates with the suction port 220 of the fixed scroll 230. Yes.
- the suction pipe 204 can be provided between the compression mechanism part 201 and the motor 202.
- the suction port 220 become closer.
- the distance of the suction passage 218 is shortened, and the refrigerant passing through the suction passage 218 is less affected by heat, so that the suction passage 218 can be formed inside the sealed container 203.
- a suction passage is provided so as to pass outside the sealed container 203 as in the first and second embodiments described above. Also good.
- a skew motor in which a skew groove (groove) 202c is formed on the outer peripheral surface of the rotor 202a is used.
- a skew groove 202c On the outer peripheral surface of the rotor 202a, there is formed a skew groove 202c that is twisted in a direction opposite to the rotation direction of the rotor 202a from the top to the bottom and continuously connected from the upper end to the lower end of the rotor 202a.
- the rotor 202a rotates clockwise as viewed from above.
- a disk 221 is provided below the rotor 202a.
- the disk 221 is fixed to the shaft 205 and is disposed at the same height as a part of the lower winding 226b positioned below the rotor 202a in the winding 226 wound around the slot portion of the stator 202b.
- a balance weight 223 for canceling the eccentric weight of the shaft 205 is integrally attached to the lower side of the disk 221.
- the refrigerant returned from the refrigeration cycle in the gas-liquid mixed state is guided into the sealed container 203 from the suction pipe 204.
- the refrigerant introduced into the sealed container 203 collides with the cylindrical cover 217 immediately after flowing out from the outlet of the suction pipe 204.
- the liquid refrigerant having a high density flows downward from the cover 217 after colliding with the cover 217, and above the rotor 202a in the winding 226 wound around the slot portion of the stator 202b. It falls on the upper winding part 226a located.
- the winding 226 of the stator 202b is cooled by the liquid refrigerant dropped from the cover 217.
- This liquid refrigerant is then guided to the lower part of the rotor 202a while cooling the outer peripheral surface of the rotor 202a and the inner peripheral surface of the stator 202b by the viscous pump effect of the skew groove 202c of the rotor 202a.
- the liquid refrigerant guided to the lower portion of the rotor 202a falls on the disk 221 and is splashed on the lower winding 226b of the stator 202b by the centrifugal force received on the rotating disk 221.
- the lower winding 226b of the stator 202b can be cooled with the liquid refrigerant, and the winding 226 of the stator 202b having the largest heat generation amount in the motor 202 can be effectively cooled from both the upper and lower sides.
- the gas refrigerant having a low density stays in the upper space located above the stator 202b after colliding with the cover 217, and the inlet of the suction passage 218 disposed above the cover 217. Sucked into.
- the gas refrigerant sucked into the inlet of the suction passage 218 flows through the suction passage 218 to the suction port 220 provided in the fixed scroll 230.
- the gas refrigerant to be compressed is supplied to the compression mechanism unit 201 with almost no thermal influence from the motor 202, that is, while suppressing the temperature rise of the gas refrigerant as much as possible.
- the refrigerant gas flowing in from the suction port 220 is compressed in the compression chamber.
- the shaft 205 rotates, the refrigerant gas is compressed while reducing the volume as it moves in the center direction of the orbiting scroll 231 and the fixed scroll 230.
- the high-pressure refrigerant gas is opened at a predetermined discharge pressure, and flows into the discharge chamber 213 from the discharge port 224 formed in the fixed scroll 230.
- the refrigerant discharged to the discharge chamber 213 above the fixed scroll 230 is finally discharged to the outside of the scroll compressor 200 through the discharge pipe 214.
- the gas-liquid mixed state is established.
- the suction refrigerant returned to the refrigerant compressor is separated into gas and liquid in the hermetic container 203, thereby preventing a decrease in reliability due to suction of the liquid refrigerant into the compression mechanism section 201.
- the separated gas refrigerant is guided to the compression mechanism unit 201 in a state where overheating from the motor 202 is suppressed as much as possible, and the separated liquid refrigerant cools the winding 226 of the stator 202b in the motor 202 from both above and below. Used.
- the liquid refrigerant can cool the windings 226 that generate the largest amount of heat from both the upper and lower sides.
- the scroll compressor 200 can be provided as a low-cost, highly reliable, and highly efficient refrigerant compressor.
- vibration and noise can be reduced by using a skew motor having a skew groove 202c formed on the outer peripheral surface of the rotor 202a.
- a pseudo skew motor having a stepped groove on the outer peripheral surface of the rotor may be used.
- An oblique groove may be formed on the outer peripheral surface of the rotor in use or in a normal motor. Even when configured in this way, the same motor cooling effect can be obtained, so that a highly efficient refrigerant compressor can be provided.
- the scroll compressor 200 has been described as an example, but a similar configuration is possible even with a rotary compressor in which the compression mechanism is disposed above the motor. Applicable.
- the present invention is not limited to these.
- the present invention is applicable to other types of refrigerant compressors as long as it is a low-pressure chamber type refrigerant compressor having a compression mechanism that sucks and compresses the refrigerant in the sealed container after the refrigerant is sucked into the sealed container. Applicable.
- the substantially hemispherical covers 117a and 119a and the cylindrical cover 217 have been described as examples.
- the present invention is not limited to these.
- the present invention can use a cover of another shape such as a substantially conical shape as long as it can drop the liquid refrigerant separated from the gas and liquid by colliding with the refrigerant sucked from the suction pipe onto the winding of the motor. It is.
- the present invention can be configured as a refrigeration cycle device including the refrigerant compressor according to the present invention as a refrigerant compressor for refrigeration or air conditioning.
- This refrigeration cycle apparatus includes a refrigerant compressor according to the present invention, a condenser that dissipates heat from refrigerant gas that has been compressed by the refrigerant compressor into a high temperature and high pressure, and a decompression device that depressurizes the high pressure refrigerant from the condenser. And an evaporator for evaporating the liquid refrigerant from the decompression device.
- a refrigeration cycle apparatus can be used for a refrigeration apparatus, an air conditioner, a heat pump type hot water heater, and the like.
Abstract
Description
すなわち、密閉容器内に吸入された圧縮対象となる冷媒の密度低下を防止することにより冷凍能力の低下を防止できると共に、モータ温度を低下させることによりモータ効率を向上させることができ、低コストで、信頼性が高く、高効率な冷媒圧縮機、および冷凍サイクル機器を提供することができる。
≪第1実施形態≫
まず、図1および図2を参照しながら本発明の第1実施形態について説明する。
図1は、本発明の第1実施形態に係るロータリ圧縮機100を示す縦断面図である。
第1実施形態に係るロータリ圧縮機100においては、気液混合の状態で冷凍サイクルから戻される冷媒は、吸入管104から密閉容器103内に導かれる。密閉容器103内に導かれた冷媒は、吸入管104の出口から流出した直後に、カバー117aに衝突する。カバー117aに衝突した冷媒のうち、密度の大きい液冷媒は、略半球殻形状のカバー117aの上表面に沿って外方に流れて外周端縁から下方に流れ、ステータ102bのスロット部に巻回された巻線126のうちのロータ102aの上方に位置する上側巻線部126a上に落下する。
次に、図3を参照しながら本発明の第2実施形態について説明する。
図3は、本発明の第2実施形態に係るロータリ圧縮機100aを示す縦断面図である。第2実施形態では、ステータ102bの上部巻線126aの冷却だけでなくステータ102bの下部巻線部126bの冷却も可能な冷媒圧縮機の例を説明する。
第2実施形態に係るロータリ圧縮機100aにおいては、ステータ102bの上部に位置する上部空間において、ステータ102bの上側巻線部126aを冷却した液冷媒がステータ102bの上部に溜まり、この液冷媒をロータ102aの外周面に形成されたスキュー溝102cによってロータ102aの下部に導くことができる。この際に、液冷媒は、ロータ102a外周面およびステータ102b内周面を冷却することができる。
次に、図4を参照しながら本発明の第3実施形態について説明する。
図4は、本発明の第3実施形態に係るロータリ圧縮機におけるカバー119の斜視図である。第3実施形態では、より低コストで吸入冷媒の気液分離を行うことができる冷媒圧縮機の例を説明する。
次に、図5を参照しながら本発明の第4実施形態について説明する。
図5は、本発明の第4実施形態に係るスクロール圧縮機200を示す縦断面図である。
第4実施形態に係るスクロール圧縮機200においては、気液混合の状態で冷凍サイクルから戻される冷媒は、吸入管204から密閉容器203内に導かれる。密閉容器203内に導かれた冷媒は、吸入管204の出口から流出した直後に、円筒形状のカバー217に衝突する。カバー217に衝突した冷媒のうち、密度の大きい液冷媒は、カバー217に衝突した後にカバー217から下方に流れ、ステータ202bのスロット部に巻回された巻線226のうちのロータ202aの上方に位置する上側巻線部226a上に落下する。
101 圧縮機構部
102 モータ
102a ロータ
102b ステータ
102c スキュー溝(溝)
103 密閉容器
104 吸入管
105 シャフト
117a カバー
118 吸込通路
119a カバー
119b 支持板(支持体)
121 ディスク(板体)
126 巻線
126b 下部巻線部
200 スクロール圧縮機(冷媒圧縮機)
201 圧縮機構部
202 モータ
202a ロータ
202b ステータ
202c スキュー溝(溝)
203 密閉容器
204 吸入管
205 シャフト
217 カバー
218 吸込通路
221 ディスク(板体)
226 巻線
226b 下部巻線部
Claims (7)
- 密閉容器と、
前記密閉容器に収納され、前記密閉容器内に冷媒が吸入された後に当該密閉容器内の冷媒を吸い込んで圧縮する圧縮機構部と、
前記密閉容器に収納され、前記圧縮機構部を駆動するモータと、
冷媒を前記密閉容器内に吸入するための吸入管と、
前記吸入管の出口に対向して設けられ、前記吸入管から吸入した冷媒を衝突させて気液分離した液冷媒を前記モータの巻線上に落下させるカバーと、
前記吸入管から吸入した冷媒が前記カバーに衝突させられて気液分離したガス冷媒を、前記圧縮機構部に設けられた圧縮室の入口に導く吸込通路と、
を備えることを特徴とする冷媒圧縮機。 - 前記モータは、前記密閉容器内に固定されるステータと、回転するロータとを有し、
前記ロータの外周には、上から下に向かって当該ロータの回転方向と反対方向に捻じれた溝が形成されており、
前記冷媒圧縮機は、前記ロータを固定支持するシャフトと、前記ステータに巻回された前記巻線のうちの前記ロータの下方に位置する下側巻線部の一部と同じ高さに配置され、前記シャフトに固定される板体と、を備えることを特徴とする請求の範囲第1項に記載の冷媒圧縮機。 - 前記カバーは、当該カバーを固定支持するための支持体と共に、一枚の板材から一体成形されていることを特徴とする請求の範囲第1項に記載の冷媒圧縮機。
- 前記カバーは、当該カバーを固定支持するための支持体と共に、一枚の板材から一体成形されていることを特徴とする請求の範囲第2項に記載の冷媒圧縮機。
- 前記圧縮機構部は、ロータリ式の圧縮機構部であることを特徴とする請求の範囲第1項乃至第4項のいずれか一項に記載の冷媒圧縮機。
- 前記圧縮機構部は、スクロール式の圧縮機構部であることを特徴とする請求の範囲第1項乃至第4項のいずれか一項に記載の冷媒圧縮機。
- 請求の範囲第1項乃至第4項のいずれか一項に記載の冷媒圧縮機を冷凍または空調用の冷媒圧縮機として備えることを特徴とする冷凍サイクル機器。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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CN201280073285.0A CN104321530B (zh) | 2012-05-22 | 2012-05-22 | 致冷剂压缩机及冷冻循环设备 |
JP2014516549A JP5897117B2 (ja) | 2012-05-22 | 2012-05-22 | 冷媒圧縮機および冷凍サイクル機器 |
PCT/JP2012/063013 WO2013175566A1 (ja) | 2012-05-22 | 2012-05-22 | 冷媒圧縮機および冷凍サイクル機器 |
EP12877576.4A EP2853743B1 (en) | 2012-05-22 | 2012-05-22 | Refrigerant compressor and refrigeration cycle device |
US14/402,965 US10047746B2 (en) | 2012-05-22 | 2012-05-22 | Refrigerant compressor and refrigeration cycle device |
IN9866DEN2014 IN2014DN09866A (ja) | 2012-05-22 | 2012-05-22 |
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PCT/JP2012/063013 WO2013175566A1 (ja) | 2012-05-22 | 2012-05-22 | 冷媒圧縮機および冷凍サイクル機器 |
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WO2013175566A1 true WO2013175566A1 (ja) | 2013-11-28 |
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PCT/JP2012/063013 WO2013175566A1 (ja) | 2012-05-22 | 2012-05-22 | 冷媒圧縮機および冷凍サイクル機器 |
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US (1) | US10047746B2 (ja) |
EP (1) | EP2853743B1 (ja) |
JP (1) | JP5897117B2 (ja) |
CN (1) | CN104321530B (ja) |
IN (1) | IN2014DN09866A (ja) |
WO (1) | WO2013175566A1 (ja) |
Cited By (2)
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CN104500405A (zh) * | 2014-12-09 | 2015-04-08 | 广东美芝制冷设备有限公司 | 低背压旋转式压缩机 |
EP4279742A1 (en) | 2022-05-16 | 2023-11-22 | LG Electronics Inc. | Rotary compressor |
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JP2018035800A (ja) * | 2016-09-02 | 2018-03-08 | 日立ジョンソンコントロールズ空調株式会社 | 密閉型電動圧縮機、及び、冷凍機器 |
KR102303545B1 (ko) * | 2017-05-12 | 2021-09-17 | 엘지전자 주식회사 | 스크롤 압축기 |
DE102018201829A1 (de) * | 2018-02-06 | 2019-08-08 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Elektromotorischer Kältemittelverdichter |
KR20200099704A (ko) * | 2019-02-15 | 2020-08-25 | 엘지전자 주식회사 | 압축기 |
CN110076513B (zh) * | 2019-04-22 | 2021-10-08 | 广东美的智能机器人有限公司 | 焊接设备、具有其的生产线及焊接方法 |
CN112833014A (zh) * | 2021-03-22 | 2021-05-25 | 广东美芝精密制造有限公司 | 主轴承、压缩机、制冷设备和生产工艺 |
CN114542471B (zh) * | 2022-03-07 | 2023-06-30 | 珠海凌达压缩机有限公司 | 挡油帽结构、压缩机及空调器 |
CN114576170B (zh) * | 2022-03-10 | 2023-09-05 | 珠海凌达压缩机有限公司 | 一种用于压缩机的下法兰结构及具有其的压缩机 |
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Also Published As
Publication number | Publication date |
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EP2853743A1 (en) | 2015-04-01 |
CN104321530B (zh) | 2016-09-21 |
JPWO2013175566A1 (ja) | 2016-01-12 |
JP5897117B2 (ja) | 2016-03-30 |
US10047746B2 (en) | 2018-08-14 |
IN2014DN09866A (ja) | 2015-08-07 |
CN104321530A (zh) | 2015-01-28 |
EP2853743A4 (en) | 2016-03-02 |
EP2853743B1 (en) | 2018-07-04 |
US20150159649A1 (en) | 2015-06-11 |
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