JP6464006B2 - Hermetic scroll compressor and refrigeration air conditioner - Google Patents

Description

  The present invention relates to a hermetic scroll compressor and a refrigeration air conditioner used for an air conditioner, a refrigerator, and the like.

  A scroll compression element (compression mechanism unit) in a hermetic scroll compressor includes a fixed scroll having a spiral scroll wrap standing upright on an end plate (end plate) surface and a turning scroll as main components. The scroll compression element reduces the volume of the working chamber formed between the scroll wraps by causing the orbiting scroll to revolve with a substantially constant radius without rotating relative to the fixed scroll. , Which compresses the working fluid (refrigerant, etc.).

  A hermetic scroll compressor (hereinafter also simply referred to as a compressor) includes the scroll compression element, an electric motor that drives the scroll compressor, and a drive shaft in a hermetic container. Discharge pressure (high pressure). In order to lubricate each sliding portion in the compression element and cool the electric motor, the working fluid is sucked into the compression element in a state where a small amount of lubricating oil is mixed, compressed and discharged. In order to ensure the reliability of the compressor and improve the performance of the refrigerating and air conditioning system, it is desired to keep the ratio (oil rate) of the lubricating oil in the working fluid discharged from the compressor as low as possible.

  In recent years, in order to reduce the size and cost of refrigeration air conditioners, compressors tend to be reduced in size and speed. In order to achieve this, reducing the oil rate of compressors is an important core technology. In recent years, from the viewpoint of preventing global warming, R32 refrigerant having a small global warming coefficient has been attracting attention as a refrigerant for refrigerating and air-conditioning apparatuses, instead of the conventional R410A refrigerant.

  In the conventional compressor (sealed scroll compressor) described in Japanese Patent Application Laid-Open No. 2007-315366 (Patent Document 1), a centrifugal oil separation member is disposed between the discharge chamber and the discharge pipe, The oil separation member includes a bottom portion and a side portion extending upward from the bottom portion, a refrigerant inlet portion, an oil storage portion, and an oil outlet portion. The refrigerant that has passed through the oil separation member is guided to the inlet of the discharge pipe. It is configured.

JP 2007-315366 A

  The above-mentioned Patent Document 1 discloses a housing (sealed container), an electric motor unit accommodated in the housing, a compression mechanism driven by the electric motor unit to compress the refrigerant, and discharge the compressed refrigerant into the housing. And a discharge pipe that guides the refrigerant discharged into the housing to the outside of the housing, comprising an oil separation means for separating lubricating oil contained in the refrigerant discharged into the housing, In the inlet of the discharge pipe, there is described a configuration in which the refrigerant that has passed through the oil separation means is guided.

  In this Patent Document 1, since the oil separating means has the same basic structure as a general centrifugal oil separating member, mixing of the discharge gas and separated oil in the oil separating means is prevented. In order to reduce the size of the oil separating member (the diameter and height of the hollow body), it is inevitable that the size of the oil separating member is increased, and the housing is also enlarged with the increase in the size of the oil separating means. There is a problem of doing. Further, no consideration is given to quickly recovering the lubricating oil separated by the oil separating means to the lubricating oil reservoir (oil storage chamber) at the bottom of the housing, and in the working fluid discharged from the compressor There is also a problem that the ratio of the lubricating oil (oil rate) cannot be kept low, that is, a sufficient oil spill prevention effect cannot be obtained.

  An object of the present invention is to obtain a hermetic scroll compressor and a refrigerating and air-conditioning apparatus using the same, which can improve the effect of preventing oil spillage to the outside of the compressor while suppressing an increase in size.

  In order to achieve the above object, the present invention provides a scroll compression element including a fixed scroll and a turning scroll, an electric motor that drives the turning scroll of the scroll compression element, and a sealed container that houses the scroll compression element and the electric motor. A suction pipe that passes through the sealed container and is connected to a suction port of the fixed scroll; a discharge pipe that passes through the sealed container and guides discharge gas discharged from the discharge port of the fixed scroll; and A hermetic scroll compressor having an oil sump provided at the bottom of a hermetic container, wherein a discharge port outlet space from which a working fluid is discharged from a discharge port of the fixed scroll, and the working fluid flows into the discharge pipe Provided to separate the discharge pipe inlet space and to surround the outlet space and the inlet space The oil separation member, the suction pipe through-hole formed in the oil separation member and through which the suction pipe passes, and the discharge gas in the outlet space are guided in the outer peripheral direction of the fixed scroll, and the discharge gas guided in the outer peripheral direction. Is provided with a flow passage for guiding the gas to the inlet space of the discharge pipe.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect which can obtain the hermetic scroll compressor which can improve the oil outflow prevention effect to the exterior of a compressor, and a refrigerating air conditioning apparatus using the same, suppressing enlargement.

It is a longitudinal cross-sectional view which shows Example 1 of the hermetic scroll compressor of this invention. It is a principal part expanded sectional view of the hermetic scroll compressor shown in FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. It is a principal part enlarged view of the swirl | wing blade member part shown in FIG. FIG. 5 is a view taken along line VV in FIG. 4. FIG. 5 is an enlarged cross-sectional view showing a main part of a hermetic scroll compressor according to a second embodiment of the present invention, corresponding to FIG. 2. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. FIG. 5 is an enlarged cross-sectional view showing a main part of a third embodiment of the hermetic scroll compressor according to the present invention, corresponding to FIG. 2. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8. FIG. 5 is an enlarged cross-sectional view showing a main part of a hermetic scroll compressor according to a fourth embodiment of the present invention, corresponding to FIG. 2. It is a XI-XI line sectional view taken on the line of FIG. It is an AA line arrow line view of FIG. It is a perspective view of the oil separation member shown in FIG. It is a refrigeration cycle block diagram of the refrigeration air conditioner provided with the hermetic scroll compressor of the present invention.

  Hereinafter, specific examples of the hermetic scroll compressor and the refrigerating and air-conditioning apparatus of the present invention will be described in detail with reference to the drawings. In each figure, the parts denoted by the same reference numerals indicate the same or corresponding parts.

  A scroll compressor according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a longitudinal sectional view showing Embodiment 1 of a hermetic scroll compressor according to the present invention, FIG. 2 is an enlarged sectional view of a main part of the hermetic scroll compressor shown in FIG. 1, and FIG. 3 is a line III-III in FIG. 4 is a cross-sectional view taken along the arrow, FIG. 4 is an enlarged view of a main part of the swirl blade member shown in FIG. 2, and FIG. 5 is a view taken along the line VV in FIG.

  The configuration of the hermetic scroll compressor 30 will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes an airtight container, in which a fixed scroll 2 and a turning scroll 3 which are main components constituting a scroll compression element are housed. The sealed container 1 is in a high-pressure atmosphere into which discharge gas is introduced, and a back pressure chamber 19 that is maintained at a pressure between high pressure and low pressure is defined on the back surface of the orbiting scroll 3. The fixed scroll 2 and the orbiting scroll 3 constituting the scroll compression element are composed of a spiral scroll wrap and an end plate (end plate) on which the wrap stands upright.

  The fixed scroll 2 is provided with a suction port 2a at the outer periphery of the scroll wrap and a discharge port 2b at the center of the scroll wrap. A turning bearing 3a is provided at the center of the surface (back surface) opposite to the scroll wrap of the turning scroll 3. The orbiting bearing 3 a is accommodated in an orbiting boss formed at the center of the back surface of the orbiting scroll 3.

  Reference numeral 4 denotes a crankshaft. An eccentric portion 4 a is provided on the upper end side of the crankshaft 4, and the eccentric portion 4 a is inserted into the orbiting bearing 3 a of the orbiting scroll 3. Therefore, by rotating the crankshaft 4, the orbiting scroll 3 can be driven (orbiting) via the eccentric portion 4a. An oil supply hole 4b is formed through the crankshaft 4 in the axial direction.

  Reference numeral 5 denotes a frame that supports the crankshaft 4 and forms the back pressure chamber 19 with the back of the orbiting scroll 3. Reference numeral 5 a denotes a main bearing that is provided at the center of the frame 5 and supports the crankshaft 4. Reference numeral 5b denotes an oil return passage that collects oil that has finished lubrication of the sliding portions of the main bearing 5a and the slewing bearing 3a and guides it to an oil sump 17 provided at the bottom of the sealed container 1.

  Reference numeral 6 denotes an Oldham ring for preventing the orbiting scroll 3 from rotating. Reference numeral 7 denotes an electric motor which is housed in a motor chamber 20 in the hermetic container 1 and includes a stator and a rotor. The electric motor 7 rotates the crankshaft 4. Reference numeral 8 denotes a secondary bearing that pivotally supports a shaft end of the crankshaft 4 opposite to the eccentric portion 4 a. The secondary bearing 8 is fixed to the secondary bearing frame 9.

  Reference numeral 10 denotes an oil supply pump attached to the lower end portion of the crankshaft 4, and each bearing slide of the orbiting bearing 3a, the main bearing 5a, and the sub-bearing 8 is passed through the oil supply hole 4b by a pumping action caused by the rotation of the crankshaft 4. Supply lubricating oil to moving parts. Further, a part of the oil that lubricates the slewing bearing 3 a and the like flows into the back pressure chamber 19 through the back pressure seal mechanism 16, lubricates the sliding portion of the Oldham ring 6, and then the fixed scroll 2. And the meshing portion of the orbiting scroll 3 is lubricated and discharged together with the compressed gas from the discharge port 2b.

  An oil return pipe 11 connected to the oil return passage 5b formed in the frame 5 finishes lubrication of sliding portions of the main bearing 5a and the slewing bearing 3a, and flows out from the oil return passage 5b. The oil to be returned is returned to the oil reservoir 17 at the bottom of the sealed container 1.

  Reference numeral 12 denotes a suction pipe for sucking a working fluid (refrigerant) circulating in the refrigeration cycle from the outside of the sealed container 1 into the compressor. The suction pipe 12 passes through the sealed container 1 and the suction of the fixed scroll 2. It is connected to port 2a.

  Reference numeral 13 denotes a swirl vane member (first oil separating means) mounted in the discharge port 2b of the fixed scroll 2, and the swirl vane member 13 swirls into the discharge gas and oil discharged from the discharge port 2b. It is for moving and separating the discharge gas and oil by the difference in centrifugal force. Reference numeral 14 denotes an oil separation member (second oil separation means) disposed on the fixed scroll 2. Details of the oil separation member 14 will be described later.

  Reference numeral 15 denotes a discharge pipe that discharges the discharge gas that passes through the sealed container 1 and is discharged from the discharge port 2 b of the fixed scroll 2 to the refrigeration cycle outside the sealed container 1. The back pressure sealing mechanism 16 seals the back pressure chamber 19 and the high pressure chamber in the sealed container 1 between the lower end of the orbiting boss portion provided with the orbiting bearing 3 a of the orbiting scroll 3 and the frame 5. It is provided to do.

The gas compression operation of the above-described hermetic scroll compressor 30 will be described.
When the electric motor 7 is energized, the crankshaft 4 rotates, and the eccentric part 4 a of the crankshaft 4 causes the center of the orbiting scroll 3 to revolve with a constant radius, and is formed between the laps of the fixed scroll 2 and the orbiting scroll 3 The working chamber is reduced in volume to compress the working fluid.

  The working fluid flows into the working chamber through the suction pipe 12 from the refrigeration cycle outside the sealed container 1. The working fluid (compressed gas) compressed in the working chamber is discharged into the sealed container 1 from the discharge port 2 b at the center of the fixed scroll 2.

Next, the lubrication of the sliding portions in the bearing sliding portions and the scroll compression element described above will be described.
The lubricating oil stored in the oil reservoir 17 at the bottom of the sealed container 1 is sucked up by the oil pump 10 attached to the lower end of the shaft by the rotation of the crankshaft 4 and passes through the oil supply hole 4b formed in the crankshaft 4. The sub-bearing 8, the main bearing 5a, and the slewing bearing 3a are supplied to the bearing sliding portions.

  The lubricating oil supplied to the sub-bearing 8 at the lower part of the sealed container 1 is immediately recovered in the oil reservoir 17. The lubricating oil supplied to the main bearing 5a and the slewing bearing 3a lubricates each bearing sliding portion, and then merges in an oil return channel 5b formed in the frame 5, and passes through an oil return pipe 11 to be sealed container. The oil is quickly recovered in the oil sump 17 at the bottom.

  Lubrication of the sliding portion of the scroll compression element is performed by supplying a fixed amount of oil into the back pressure chamber 19 by an oil supply pocket (not shown) recessed in the lower end surface of the orbiting boss portion of the orbiting scroll 3. Lubrication of the sliding part of the Oldham ring 6 which is a rotation prevention mechanism is performed. The oil supplied to the back pressure chamber 19 flows into the working chamber through a back pressure control valve (not shown) that adjusts the pressure in the back pressure chamber 19, and is used for sealing and lubricating the working chamber. It is discharged from the discharge port 2b together with the working fluid (compressed gas).

  In order to ensure the performance and reliability of the hermetic scroll compressor 30 and improve the system performance, it is necessary to keep the ratio (oil rate) of the lubricating oil in the working fluid discharged from the compressor as low as possible. . Therefore, it is necessary to effectively separate the lubricating oil in the working fluid (discharge gas) flowing out from the discharge port 2b and quickly collect it in the oil reservoir 17 at the bottom of the sealed container 1.

For this purpose, the oil separating means and its oil separating action in the present embodiment will be described with reference to FIGS.
The white arrows in FIG. 2 indicate the flow of the discharge gas, and the solid arrows indicate the flow of the lubricating oil.

  The oil separation member 14 disposed on the upper portion of the fixed scroll 2 includes a discharge port outlet space 1a through which the working fluid is discharged from the discharge port 2b of the fixed scroll 2, and a discharge pipe inlet through which the working fluid flows into the discharge pipe 15. It is provided so as to separate the space 1c and surround the discharge port outlet space 1a and the discharge pipe inlet space 1c. In other words, the oil separation member 14 is composed of an oil separation cover 14a and an oil separation cover 14b in this embodiment.

  The oil separation cover 14a is provided so as to surround the discharge port outlet space 1a. After colliding the discharge gas flowing out from the discharge port 2b into the discharge port outlet space 1a, the discharge gas in the outlet space 1a is discharged. Is formed in the outer peripheral direction of the fixed scroll, that is, the first flow passage 14aa for guiding the discharge gas to the oil return space 1b in the outer peripheral portion of the fixed scroll 2.

  The oil separation cover 14b is provided so as to surround the discharge pipe inlet space 1c, and flows the discharge gas guided to the outer periphery of the fixed scroll, that is, the oil return space 1b, toward the discharge pipe inlet space 1c. A second flow path 14ba is formed.

  Below the oil return space 1b, there is formed an oil return passage 1d formed by partially cutting the outer periphery of the fixed scroll 2 and the frame 5, and the lubricating oil separated from the discharge gas is quickly supplied to the motor. It is configured to be collected in an oil sump 17 at the bottom of the sealed container 1 through the chamber 20. The oil separation member 14 (oil separation cover 14b in this example) is formed with a suction pipe through hole 14ab through which the suction pipe 12 passes. The oil separation covers 14a and 14b are laminated and joined together and fixed to the upper lid of the sealed container 1.

  Further, as shown in FIGS. 4 and 5, the swirl vane member 13 provided in the discharge port 2b of the fixed scroll 2 includes a pipe 13a fixed by press-fitting or the like in the discharge port 2b, and the pipe 13a. It is comprised from the twisting ribbon-shaped swirl | wing blade 13b fixed to the lower end part inside. The working fluid passing through the discharge port 2b becomes a gas-liquid two-phase spray flow mixed with lubricating oil and flows into the swirl vane 13b. When passing through the swirl vane 13b, the spray flow is given a swirl velocity component. For this reason, in the pipe 13a, oil droplets having a large mass are pressed against the inner wall of the pipe 13a by centrifugal force to form a liquid film flow, and are separated from a low-density gas flowing in the center of the pipe 13a. When the oil flows from the swirl vane member 13 to the discharge port outlet space 1a, the oil on the inner wall of the pipe 13a is transported to the oil return space 1b on the outer periphery of the fixed scroll 2 along the upper surface of the fixed scroll 2 by the action of centrifugal force. From here, the oil is returned to the oil reservoir 17 at the bottom of the sealed container 1 through the oil return passage 1d.

  On the other hand, the gas flowing through the central portion of the pipe 13a collides with the oil separation cover 14a, and at this time, the gas cannot be separated by the swirling blade member 13 as the first oil separation means and is mixed in the discharge gas. The oil is separated. The discharged gas is guided by the first flow passage 14aa formed by the oil separation cover 14a and reaches the oil return space 1b at the outer peripheral portion of the fixed scroll 2. From there, it is guided to the upper oil separation cover 14b, and passes through the second flow passage 14ba formed in the outer peripheral portion excluding the suction pipe 12 as shown in FIG. , Changes direction, enters the discharge pipe inlet space 1c, and flows out from the discharge pipe 15 to the refrigeration cycle outside the sealed container 1.

In this way, the oil is further separated from the discharge gas by the change in the flow direction of the discharge gas, and accumulates on the upper surface of the oil separation cover 14b. As shown in FIGS. 2 and 3, a gap is formed between the suction pipe through hole 14 ab formed in the oil separation member 14 and the suction pipe 12.
Accordingly, the oil accumulated on the upper surface of the oil separation cover 14b drops into the oil return space 1b through the gap, and the oil sump 17 at the bottom of the sealed container 1 passes from the oil return space 1b through the oil return passage 1d. To be recovered.

  According to the present embodiment, oil can be sufficiently reduced from flowing out from the discharge pipe 15 to the refrigeration cycle outside the sealed container 1 with a relatively simple configuration without increasing the size. Therefore, it is possible to obtain a hermetic scroll compressor capable of improving the oil leakage prevention effect to the outside of the compressor while suppressing an increase in size, and improving the performance and reliability of the compressor while reducing the cost. be able to. The first flow passage 14aa formed in the oil separation cover 14a is configured to flow the flow from the discharge port 2e to the side opposite to the suction pipe 12 side or the side away from the suction pipe 12. Good.

6 is an enlarged cross-sectional view of a main part showing Embodiment 2 of the hermetic scroll compressor of the present invention, a view corresponding to FIG. 2, and FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. In FIGS. 6 and 7, the parts denoted by the same reference numerals as those in FIGS. 1 to 5 are the same or corresponding parts. explain.
In the first embodiment, the example in which the oil separation member 14 is configured by two upper and lower oil separation covers 14a and 14b has been described. However, in the second embodiment, the oil separation member 14 is configured by one oil separation cover 14c. An example will be described.

  In this embodiment, as shown in FIGS. 6 and 7, the outer periphery of the outlet portion of the discharge port 2 b and the oil return space 1 b provided on the outer periphery of the fixed scroll 2 are communicated with the upper surface of the fixed scroll 2. In addition, a plurality (three in this example) of radial concave grooves 2ca, 2cb, 2cc are provided. The oil separation member 14 is formed to surround the outlet space 1a of the discharge port 2b and the inlet space 1c of the discharge pipe 15, and forms the first flow passage 2c together with the concave grooves 2ca, 2cb, 2cc. The oil separation cover 14c has a bent portion 14ca that is bent upward in the vicinity of the hermetic container 1 on the outer peripheral side, and the oil separation cover 14c is fixed to the upper surface of the fixed scroll 2 with bolts 18. Between the bent portion 14ca on the outer peripheral side of the oil separation cover 14c and the inner peripheral surface of the sealed container 1, a second axial flow passage 14cb is formed that extends upward.

  The concave grooves 2ca, 2cb, 2cc forming the first flow passage 2c are formed on the upper surface of the fixed scroll 2 other than the connection portion of the suction pipe 12, and the suction pipe 12 of the oil separation cover 14c passes therethrough. As in the first embodiment, the portion is provided with a suction pipe through hole 14ab, and a gap for allowing oil to pass is formed between the suction pipe through hole 14ab and the suction pipe 12. . Other configurations are the same as those of the first embodiment.

  Also in the second embodiment, the same oil separation action as that of the first embodiment described above can be obtained, and the same effect of preventing oil from flowing out of the compressor as in the first embodiment can be obtained. That is, when the discharge gas flows into the discharge port outlet space 1a, the oil in the discharge gas is separated by the swirl vane member 13 by the action of centrifugal force, and the oil return space 1b on the outer peripheral side along the upper surface of the fixed scroll 2 is separated. From here, the oil is returned to the oil sump 17 at the bottom of the sealed container 1 through the oil return passage 1d.

  The discharge gas collides with the oil separation cover 14c, and the oil mixed in the discharge gas is also separated at this time. Thereafter, the discharge gas is guided to the first flow passage 2c to reach the oil return space 1b on the outer peripheral portion of the fixed scroll 2, and collides with the inner surface of the sealed container 1 to change the direction, and the second flow passage 14cb. , Flows upward and collides with the upper lid of the sealed container 1, further changes direction, enters the discharge pipe inlet space 1 c, and flows out from the discharge pipe 15 to the refrigeration cycle outside the sealed container 1.

  Thus, the oil is separated from the discharge gas and accumulated on the upper surface of the oil separation member 14 due to the change in the flow direction of the discharge gas, and the suction pipe through hole 14ab and the suction pipe 12 formed in the oil separation member 14 The oil flows down to the oil return space 1b through the gap formed between the oil return space 1b and the oil return space 1b through the oil return passage 1d and collected in the oil reservoir 17 at the bottom of the sealed container 1.

  As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained, the effect of preventing oil spill to the outside of the compressor can be improved with a simpler configuration, and the cost can be further reduced. It is possible to improve the performance and reliability of the compressor.

  8 is an enlarged cross-sectional view of a main part showing Embodiment 3 of the hermetic scroll compressor of the present invention, a view corresponding to FIG. 2, and FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. In FIGS. 8 and 9, the parts denoted by the same reference numerals as those in FIGS. 1 to 5 are the same or corresponding parts. The description of the same parts as those in the first embodiment is omitted, and different parts are mainly described. explain.

  In this embodiment, as shown in FIGS. 8 and 9, the oil separation member 14 disposed on the upper portion of the fixed scroll 2 is disposed on a thick disk-shaped oil separation plate 14 d and the oil separation plate 14 d. The oil separation cover 14e is provided, and both are laminated and fixed to the upper surface of the fixed scroll 2 with bolts 18. A cylindrical portion 14da formed so as to surround the discharge port outlet space 1a is provided at the central portion of the oil separation plate 14d, and is formed in a tangential direction from the inner wall surface of the cylindrical portion 14db and is a fixed scroll. A plurality of first flow passages 14db communicating with the oil return space 1b in the outer peripheral portion are formed. The discharge gas and the separated oil discharged to the discharge port outlet space 1c are configured to flow to the oil return space 1b through the plurality of first flow passages 14db. Further, as in the second embodiment, an axial second flow passage 14ea is formed between the outer peripheral side of the oil separation cover 14e and the inner peripheral surface of the closed casing 1 in the upward direction. Other configurations are the same as those of the first embodiment.

  Also in the third embodiment, the same oil separation action as that of the first embodiment described above can be obtained, and the same effect of preventing the oil from flowing out of the compressor as in the first embodiment can be obtained. That is, when the discharge gas flows out into the discharge port outlet space 1a, the oil in the discharge gas is separated by the swirl vane member 13 by the action of centrifugal force. Are separated, and the discharge gas and oil flow to the oil return space 1b on the outer peripheral side through the first flow passage 14db. The oil that has flowed into the oil return space 1b passes through the oil return passage 1d and is collected in the oil reservoir 17 at the bottom of the sealed container 1.

  The discharge gas that has flowed into the oil return space 1b collides with the inner surface of the sealed container 1 in the oil return space 1b and changes direction, and then flows upward through the second flow passage 14ea. It collides with the upper lid, further changes its direction, enters the discharge pipe inlet space 1c, and flows out from the discharge pipe 15 to the refrigeration cycle outside the sealed container 1. As described above, the oil is further separated from the discharge gas by the change in the flow direction of the discharge gas, and is accumulated on the upper surface of the oil separation member 14, and the suction pipe through hole 14ab and the suction pipe formed in the oil separation member 14 The oil flows down to the oil return space 1b through the gap formed between the oil return space 1 and the oil return space 1b, through the oil return passage 1d, and collected in the oil reservoir 17 at the bottom of the sealed container 1.

  Thus, also in the third embodiment, the same effect as in the first embodiment can be obtained. Further, according to the present embodiment, while maintaining the momentum of the swirling flow of the discharge gas flowing out from the swirling blade member 13, the first flow passage 14db formed in the tangential direction of the cylindrical portion 14da is passed through. Since it can be made to eject toward the inner surface of the sealed container 1 and collide, the separation efficiency of the oil contained in the discharge gas can be further improved.

  10 is an enlarged cross-sectional view of the main part showing Embodiment 4 of the hermetic scroll compressor of the present invention, which corresponds to FIG. 2, FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. 10, and FIG. FIG. 13 is a perspective view of the oil separation member shown in FIG. In these FIGS. 10-13, the part which attached | subjected the same code | symbol as the said FIGS. 1-5, FIG. 8, FIG. Omitted and the description will focus on the different parts.

  In the present embodiment, as shown in FIGS. 10 and 11, the oil separation member 14 disposed on the upper portion of the fixed scroll 2 includes a cylindrical oil separation plate 14f having a thickness and the oil separation plate 14f. The oil separation cover 14e is disposed on the fixed scroll 2 and is fixed to the upper surface of the fixed scroll 2 with bolts 18. A cylindrical portion 14fa formed so as to surround the discharge port outlet space 1a is provided at the central portion of the oil separation plate 14f as in the third embodiment. As shown in FIG. 11, three radial spaces are formed in the circumferential direction to form the first flow passage 14fb that communicates the inside of the cylindrical portion 14fa and the outer peripheral surface of the oil separation plate 14f.

  Further, in each space forming the first flow passage 14fb, as shown in FIG. 13, a bellows-shaped oil separator 14fc formed by bending a thin plate is shown in FIGS. Is inserted and installed. Other configurations are the same as those of the first and third embodiments.

  Also in the fourth embodiment, the same oil separation action as in the first and third embodiments described above can be obtained, and the effect of preventing oil outflow to the outside of the compressor can be obtained. That is, when the discharge gas flows out into the discharge port outlet space 1a, the oil in the discharge gas is separated by the swirl vane member 13 by the action of centrifugal force, and even if the discharge gas collides with the oil separation cover 14e, The discharged gas and oil flow through the first flow passage 14fb to the oil return space 1b on the outer peripheral side. The oil that has flowed into the oil return space 1b is collected in the oil sump 17 through the oil return passage 1d.

  The discharge gas that has flowed into the oil return space 1b collides with the inner surface of the sealed container 1 and changes direction, passes through the second flow passage 14ea, flows upward, and collides with the upper lid of the sealed container 1 and further changes direction. , Enters the discharge pipe inlet space 1c and flows out from the discharge pipe 15 to the refrigeration cycle outside the sealed container 1.

  As described above, the oil is further separated from the discharge gas by the change in the flow direction of the discharge gas and is accumulated on the upper surface of the oil separation member 14. The oil flows down to the oil return space 1b through the gap formed between the oil return space 1 and the oil return space 1b, through the oil return passage 1d, and collected in the oil reservoir 17 at the bottom of the sealed container 1.

  Thus, also in the fourth embodiment, the same effects as those of the first and third embodiments can be obtained. Further, according to the present embodiment, when the discharge gas passes through the oil separator 14fc, the oil contained in the discharge gas is trapped in the bellows-shaped groove by the surface tension, so that it is included in the discharge gas. The oil separation efficiency can be further improved.

  In the above-described example, the oil separator 14fc is described as having a fine groove structure in which a thin plate is bent into a bellows shape. Instead, the oil separator 14fc is replaced with a wire mesh or a metal scrubber shape. You may use what was comprised as a mesh material of a metal fiber, such as a thing. In addition, a porous metal such as a sintered metal having a high porosity can be used as the oil separator 14fc. If such a porous metal is used as the oil separating material 14fc, it is easy to manufacture and can be manufactured by freely selecting the porosity and shape.

  Next, a specific example of a refrigeration air conditioner equipped with the hermetic scroll compressor of the present invention will be described with reference to a refrigeration cycle configuration diagram shown in FIG. Here, an example of a refrigeration air conditioner using R32 as a refrigerant will be described. Refrigerant R32 has a global warming potential (GWP) smaller than refrigerant R410A that has been conventionally used in refrigeration air conditioners, and has recently been attracting attention from the viewpoint of preventing global warming.

  In FIG. 14, 30 is a hermetic scroll compressor, and this hermetic scroll compressor 30 is the same as the hermetic scroll compressor shown in FIG. That is, the refrigerating and air-conditioning apparatus according to the present invention uses, for example, any of the hermetic scroll compressors shown in the first to fourth embodiments. In FIG. 14, the same reference numerals as those in FIG. 1 indicate the same components, and thus the description of the structure of the hermetic scroll compressor 30 is omitted here.

In FIG. 14, 32 is a condenser, 33 is an expansion valve, and 34 is an evaporator. These are sequentially connected by a refrigerant pipe 35 to constitute a refrigeration cycle 31.
The flow of the refrigerant will be described. The high-temperature and high-pressure refrigerant discharged from the hermetic scroll compressor 30 enters the condenser 32 and dissipates heat to lower the temperature. The refrigerant discharged from the condenser 32 enters the expansion valve 33 and is discharged as a low-temperature, low-pressure gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant exiting the expansion valve 33 enters the evaporator 34, absorbs heat and gasifies, returns to the hermetic scroll compressor 30, is compressed again, and the same cycle is repeated thereafter. . Thereby, if it is a freezing apparatus, the to-be-cooled object will be cooled by the evaporator 34. In the case of an air conditioner, the room air is cooled by the evaporator 34 for cooling operation, or the room air is heated by the condenser 32 for heating operation.

  As described above, the hermetic scroll compressor according to each embodiment of the present invention includes the discharge port outlet space through which the working fluid is discharged from the discharge port of the fixed scroll, and the discharge pipe inlet space through which the working fluid flows into the discharge pipe. And an oil separation member provided so as to surround the outlet space and the inlet space, a suction pipe through hole formed in the oil separation member and through which the suction pipe passes, and a discharge gas in the outlet space Is provided in the outer peripheral direction of the fixed scroll, and a flow passage is provided for guiding the discharge gas guided in the outer peripheral direction to the inlet space of the discharge pipe.

  Therefore, according to each embodiment of the present invention, it is possible to improve the oil separation effect from the discharge gas while suppressing the increase in size and reducing the cost. can get. Thereby, it can be set as the hermetic scroll compressor excellent in performance and reliability, for example, the performance and reliability of the refrigeration air conditioner using R32 refrigerant can be improved.

  In the present embodiment, the oil separated from the discharge gas and collected in the inlet space of the discharge pipe is collected in the oil reservoir through the clearance between the suction pipe through hole and the suction pipe. With a simple structure, the oil spill prevention effect to the outside of the compressor can be improved.

  Further, in this embodiment, a swirl vane member is provided in the discharge port of the fixed scroll so as to give a swirl motion to the flow of the discharge gas, so that the oil in the discharge gas discharged from the discharge port has a swirl action. The oil is also separated from the discharge gas by this action, so that the effect of remarkably improving the oil separation efficiency can be obtained.

In addition, this invention is not limited to the Example mentioned above, Various modifications are included. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
Further, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

DESCRIPTION OF SYMBOLS 1 ... Airtight container, 1a ... Discharge port exit space, 1b ... Oil return space,
1c: discharge pipe inlet space, 1d: oil return passage,
2 ... fixed scroll, 2a ... suction port, 2b ... discharge port,
2c ... 1st flow path (2ca, 2cb, 2cc ... concave groove),
3 ... orbiting scroll, 3a ... orbiting bearing,
4 ... crankshaft, 4a ... eccentric part, 4b ... oil supply hole,
5 ... Frame, 5a ... Main bearing, 5b ... Oil return channel,
6 ... Oldham ring, 7 ... Electric motor,
8 ... sub bearing, 9 ... sub bearing frame, 10 ... oil pump,
11 ... Oil return pipe, 12 ... Suction pipe,
13 ... swirl member, 13a ... pipe, 13b ... swirl blade,
14 ... Oil separation member, 14a, 14b, 14c, 14e ... Oil separation cover,
14d, 14f ... oil separation plate,
14aa ... 1st flow path, 14ba, 14cb, 14ea ... 2nd flow path,
14ab ... suction pipe through-hole, 14ca ... bent portion, 14da ... discharge gas flow passage,
14fa ... oil separator,
15 ... discharge pipe, 16 ... back pressure sealing mechanism,
17 ... Oil sump, 18 ... Bolt, 19 ... Back pressure chamber, 20: Motor chamber,
30 ... Hermetic scroll compressor,
DESCRIPTION OF SYMBOLS 31 ... Refrigeration cycle, 32 ... Condenser, 33 ... Expansion valve, 34 ... Evaporator, 35 refrigerant | coolant piping.

Claims (12)

A scroll compression element comprising a fixed scroll and an orbiting scroll;
An electric motor for driving the orbiting scroll of the scroll compression element;
A sealed container that houses the scroll compression element and the electric motor;
A suction pipe penetrating the sealed container and connected to the suction port of the fixed scroll;
A discharge pipe that penetrates the sealed container and guides the discharge gas discharged from the discharge port of the fixed scroll to the outside of the sealed container;
A hermetic scroll compressor comprising an oil sump provided at the bottom of the hermetic container,
A discharge port outlet space from which the working fluid is discharged from the discharge port of the fixed scroll is separated from a discharge pipe inlet space through which the working fluid flows into the discharge pipe, and surrounds the outlet space and the inlet space. An oil separation member provided;
A suction pipe through-hole formed in the oil separation member and through which the suction pipe passes;
The discharge gas in the outlet space is guided in the outer peripheral direction of the fixed scroll, and the flow path for guiding the discharge gas guided in the outer peripheral direction to the inlet space of the discharge pipe is provided .
A gap formed between the through hole formed in the oil separating member and the suction pipe passing through the through hole;
An oil return passage formed between the sealed container and the fixed scroll;
The oil collected in the discharge pipe inlet space through the oil return passage and the gap, hermetic scroll compressor characterized that you have configured to return to the oil reservoir of the hermetically sealed container bottom. The hermetic scroll compressor according to claim 1,
A hermetic scroll compressor characterized in that a swirl vane member is provided in the discharge port of the fixed scroll to impart a swirl motion to the flow of discharge gas discharged from the discharge port. The hermetic scroll compressor according to claim 1,
The hermetic scroll compressor, wherein the oil separation member is formed with a first flow passage that guides the discharge gas discharged from the discharge port of the fixed scroll to the outer peripheral portion of the fixed scroll. The hermetic scroll compressor according to claim 3 ,
The oil separation member is formed with a second flow passage for flowing the discharge gas guided to the outer peripheral portion of the fixed scroll through the first flow passage to the inlet space of the discharge pipe. A hermetic scroll compressor. The hermetic scroll compressor according to claim 4 ,
The hermetic scroll compressor, wherein the second flow passage is an axial through hole formed on an outer peripheral side of the oil separation member. The hermetic scroll compressor according to claim 4 ,
The hermetic scroll compressor, wherein the second flow passage is an axial flow passage formed by an outer peripheral side of the oil separation member and an inner surface of the hermetic container. The hermetic scroll compressor according to claim 4 ,
The oil separating member is
The discharge port exit space is provided so as to surround the discharge port. After colliding with the discharge gas flowing out from the discharge port to the discharge port outlet space, the discharge gas in the outlet space is guided to the outer periphery of the fixed scroll. An oil separation cover forming a flow path;
An oil separation cover which is provided so as to surround the discharge pipe inlet space and has a second flow passage for flowing the discharge gas guided to the outer periphery of the fixed scroll to the discharge pipe inlet space side; A hermetic scroll compressor characterized by comprising: The hermetic scroll compressor according to claim 4 ,
The oil separation member includes a disk-shaped oil separation plate and an oil separation cover disposed on the oil separation plate, and is laminated and fixed on the upper surface of the fixed scroll. Is provided with a cylindrical portion formed so as to surround the discharge port outlet space, and the first flow passage is formed in a tangential direction from an inner wall surface of the cylindrical portion and communicates with an outer peripheral portion of the fixed scroll. A hermetic scroll compressor characterized in that a second flow passage in the axial direction is formed between the outer peripheral side of the oil separation cover and the inner peripheral surface of the hermetic container. . A scroll compression element comprising a fixed scroll and an orbiting scroll;
An electric motor for driving the orbiting scroll of the scroll compression element;
A sealed container that houses the scroll compression element and the electric motor;
A suction pipe penetrating the sealed container and connected to the suction port of the fixed scroll;
A discharge pipe that penetrates the sealed container and guides the discharge gas discharged from the discharge port of the fixed scroll to the outside of the sealed container;
A hermetic scroll compressor comprising an oil sump provided at the bottom of the hermetic container,
A discharge port outlet space from which the working fluid is discharged from the discharge port of the fixed scroll is separated from a discharge pipe inlet space through which the working fluid flows into the discharge pipe, and surrounds the outlet space and the inlet space. An oil separation member provided;
A suction pipe through-hole formed in the oil separation member and through which the suction pipe passes;
The discharge gas in the outlet space is guided in the outer peripheral direction of the fixed scroll, and the flow path for guiding the discharge gas guided in the outer peripheral direction to the inlet space of the discharge pipe is provided.
The oil separation member is formed with a first flow passage that guides the discharge gas discharged from the discharge port of the fixed scroll to the outer peripheral portion of the fixed scroll, and the fixed scroll through the first flow passage. A second flow path for flowing the discharge gas guided to the outer periphery of the discharge pipe to the inlet space of the discharge pipe is formed,
Provided on the upper surface of the fixed scroll is a radial groove formed so as to communicate the outer periphery of the outlet portion of the discharge port and the outer periphery of the fixed scroll;
The oil separating member is formed to surround the discharge port outlet space and the discharge pipe inlet space, forms a first flow passage with the concave groove, and a bent portion whose outer peripheral side is bent upward in the vicinity of the sealed container The oil separation cover is fixed to the upper surface of the fixed scroll, and a shaft extending upward is provided between the bent portion of the oil separation cover and the inner peripheral surface of the sealed container. A hermetic scroll compressor characterized in that a second flow passage in the direction is formed. A scroll compression element comprising a fixed scroll and an orbiting scroll;
An electric motor for driving the orbiting scroll of the scroll compression element;
A sealed container that houses the scroll compression element and the electric motor;
A suction pipe penetrating the sealed container and connected to the suction port of the fixed scroll;
A discharge pipe that penetrates the sealed container and guides the discharge gas discharged from the discharge port of the fixed scroll to the outside of the sealed container;
A hermetic scroll compressor comprising an oil sump provided at the bottom of the hermetic container,
A discharge port outlet space from which the working fluid is discharged from the discharge port of the fixed scroll is separated from a discharge pipe inlet space through which the working fluid flows into the discharge pipe, and surrounds the outlet space and the inlet space. An oil separation member provided;
A suction pipe through-hole formed in the oil separation member and through which the suction pipe passes;
The discharge gas in the outlet space is guided in the outer peripheral direction of the fixed scroll, and the flow path for guiding the discharge gas guided in the outer peripheral direction to the inlet space of the discharge pipe is provided.
The oil separation member is formed with a first flow passage that guides the discharge gas discharged from the discharge port of the fixed scroll to the outer peripheral portion of the fixed scroll, and the fixed scroll through the first flow passage. A second flow path for flowing the discharge gas guided to the outer periphery of the discharge pipe to the inlet space of the discharge pipe is formed,
The oil separation member includes a cylindrical oil separation plate and an oil separation cover disposed on the oil separation plate, and is laminated and fixed on the upper surface of the fixed scroll. Is provided with a cylindrical portion formed so as to surround the discharge port outlet space, and the first flow passage is formed in a radial direction formed so as to communicate the inside of the cylindrical portion and the outer peripheral surface of the oil separation plate. A hermetic scroll compressor, characterized in that an oil separator is installed in a space that is configured by a space and forms the first flow passage. The hermetic scroll compressor according to claim 10 ,
2. The hermetic scroll compressor according to claim 1, wherein the oil separator is one of a bellows shape formed by bending a thin plate, a metal fiber mesh material, and a porous metal. A refrigerating and air-conditioning apparatus comprising the hermetic scroll compressor according to any one of claims 1 to 11 .

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