JP5050543B2 - Hermetic compressor - Google Patents

Description

  The present invention relates to a hermetic compressor.

  In a hermetic compressor conventionally used in an air conditioner or the like, the inside of the hermetic container is filled with lubricating oil for lubrication of a sliding portion such as a bearing that supports a compression mechanism and a crankshaft. . This lubricating oil is supplied to sliding parts such as a compression mechanism and a bearing through an oil passage inside the crankshaft.

  A part of the lubricating oil becomes minute droplets (mist) during operation of the compressor, and is discharged together with a compression medium such as refrigerant gas compressed by the compression mechanism to a refrigerant circuit outside the compressor communicating with the compressor. If the lubricating oil discharged to the outside of the compressor increases, the lubricating oil inside the sealed container decreases and the sliding portion may be seized. As described above, in the hermetic compressor, in order to prevent seizure of the sliding portion due to running out of oil and to improve the reliability, the discharge of lubricating oil (so-called oil rise) to the refrigerant circuit is suppressed. There is a need to.

Therefore, conventionally, there is a hermetic compressor disclosed in Patent Document 1 including a resin partition member that separates a forward path and a return path of a gas passage through which a compression medium discharged from a compression mechanism circulates in a sealed container. In the compressor described in Patent Document 1, the partition member prevents the forward-side compressed medium containing a large amount of lubricating oil droplets from mixing with the backward-side compressed medium discharged to the outside of the compressor. The amount of lubricating oil discharged is reduced.
JP 2002-115686 A

  However, in the compressor described in Patent Document 1, the lubricating oil and the compression medium are not well separated, and there are a mechanism for separating the lubricating oil, a copper tube through which the separated lubricating oil passes, a sheet metal guide, and the like. I need it. Therefore, it is difficult to secure an installation space for a mechanism for separating the lubricant, and it is difficult to reduce the size of the compressor.

  In addition, when a guide serving as a lubricating oil passage and a compression medium passage is provided inside the sealed container, it is difficult in terms of configuration to secure an insulation distance between the guide and the motor for driving the compression mechanism. For this reason, it is difficult to secure a compression medium passage when the compressor is to be reduced in size and diameter.

  Furthermore, if the lubricating oil passage and the compression medium passage are provided separately, the components of each passage are required, and the number of parts increases, resulting in an increase in parts cost and assembly cost.

  An object of the present invention is to provide a hermetic compressor that can reduce the lubricating oil discharged to the outside of the compressor together with the compression medium, and can achieve downsizing and reduction in manufacturing cost.

The hermetic compressor of the first invention includes a hermetic container, a guide member, and a drive motor . The guide member is accommodated inside the sealed container. The guide member has a compression medium guide portion and a lubricant guide portion. The compression medium guide part has a compression medium passage for guiding the compression medium. The lubricant guide portion has a lubricant passage for guiding the lubricant. The guide member is configured by integrally forming a compression medium guide portion and a lubricant guide portion. The guide member is made of an insulating material at least near the stator. The drive motor is installed below the guide member. The drive motor has a stator fixed to the hermetic container and a rotor that rotates inside the stator.

  Here, since the guide member is formed by integrally forming the compression medium guide portion and the lubricating oil guide portion, it is possible to save space inside the compressor and reduce manufacturing costs. In addition, the compressed oil and the lubricating oil separately flow in the compressed medium passage and the lubricating oil passage, respectively, so that the lubricating oil discharged to the outside of the compressor together with the compressed medium can be reduced.

  In addition, since at least a portion of the guide member close to the stator is made of an insulating material, the guide member can be disposed close to or in contact with the stator, and the entire compressor can be downsized.

The hermetic compressor of the second invention is the hermetic compressor of the first invention, wherein the guide member is in contact with the stator.

  Here, since the guide member is in contact with the stator, airtightness between the inside and outside of the guide member is improved, and mixing of the compression medium and the lubricating oil can be prevented.

The hermetic compressor of the third invention is the hermetic compressor of the first or second invention , and the outer peripheral surface of the guide member is arranged so as to be continuous with the outer peripheral surface of the stator.

  Here, since the outer peripheral surface of the guide member is arranged so as to be continuous with the outer peripheral surface of the stator, the flow of the compression medium and the lubricating oil can be made smooth.

A hermetic compressor according to a fourth invention is the hermetic compressor according to any one of the first to third inventions , wherein the guide member has a cylindrical main body. The compression medium guide portion and the lubricant guide portion are formed on the outer peripheral surface of the cylindrical main body.

  Here, since the compression medium guide portion and the lubricant guide portion are formed on the outer peripheral surface of the cylindrical main body, the number of parts can be reduced and the structure of the guide member is simplified.

The hermetic compressor of the fifth invention is the hermetic compressor of the fourth invention, wherein the compression medium passage has an arc-shaped section extending along the outer peripheral surface of the cylindrical main body.

  Here, since the compression medium passage has an arc-shaped section extending along the outer peripheral surface of the cylindrical main body, a minute splash of lubricating oil flowing together with the compression medium is compressed when the compression medium passes through the arc-shaped section. It can be effectively centrifuged from the medium. Therefore, the effect of separating the lubricating oil from the compressed medium is increased.

A hermetic compressor according to a sixth aspect of the present invention is the hermetic compressor according to the fifth aspect of the present invention, wherein the guide member further includes a bypass passage for flowing the lubricating oil centrifuged in the arc-shaped section from the arc-shaped section to the lubricating oil path. Have.

  Here, since the guide member further includes a bypass passage for flowing the lubricating oil centrifuged in the arc-shaped section from the arc-shaped section to the lubricating oil path, the effect of separating the compression medium and the lubricating oil is further enhanced.

The hermetic compressor of the seventh invention is the hermetic compressor of any of the first to sixth inventions, wherein the width of the compression medium passage is 20 to 50% of the outer peripheral length of the guide member. The width of the lubricating oil passage is 3 to 15% of the outer peripheral length of the guide member.

  Here, the width of the compression medium passage is 20 to 50% of the outer peripheral length of the guide member, and the width of the lubricating oil passage is 3 to 15% of the outer peripheral length of the guide member. It is possible to ensure a smooth flow.

A hermetic compressor according to an eighth aspect of the present invention is the hermetic compressor according to any one of the first to fourth aspects , wherein the guide member further has a protrusion that protrudes into the flow of the compression medium. .

  Here, since the guide member further has a protrusion that protrudes into the flow of the compression medium, the fine powder of the lubricating oil contained in the compression medium is removed from the compression medium by colliding the compression medium with the protrusion. It is possible to separate them.

A hermetic compressor according to a ninth invention is the hermetic compressor according to any of the first to eighth inventions, and uses carbon dioxide as a compression medium.

  Here, the hermetic compressor uses carbon dioxide, which is higher in pressure than other compression media, as the compression medium. By using the guide member, the inside of the casing is smoothly circulated while the compression medium and the lubricating oil are separated from each other. It is possible to make it.

According to the first invention, the guide member is formed by integrally forming the compression medium guide portion and the lubricating oil guide portion, so that space saving inside the compressor can be achieved, and the compressor can be downsized. become. In addition, the manufacturing cost can be reduced. Further, the lubricating oil discharged to the outside of the compressor together with the compression medium can be reduced. In addition, the guide member can be disposed close to or in contact with the stator, and the entire compressor can be reduced in size.

According to the second invention, the flow of the compression medium and the lubricating oil can be made smooth.

According to the third invention, the flow of the compression medium and the lubricating oil can be made smooth.

According to the fourth invention, the number of parts can be reduced, and the structure of the guide member is simplified.

According to the fifth aspect, the effect of separating the lubricating oil from the compressed medium is increased.

According to the sixth aspect , the effect of separating the compression medium and the lubricating oil is further enhanced.

According to the seventh aspect, a smooth flow of the compression medium and the lubricating oil can be ensured.

According to the eighth aspect of the invention, the fine powder of lubricating oil contained in the compressed medium can be separated from the compressed medium by the protrusion.

According to the ninth aspect , even when high-pressure carbon dioxide is used as the compression medium, the inside of the casing can be smoothly circulated in a state where the compression medium and the lubricating oil are separated from each other by using the guide member.

Next, an embodiment of the hermetic compressor of the present invention will be described with reference to the drawings.
[First Embodiment]
<Overall configuration of high / low pressure dome compressor 101>
The scroll type high and low pressure dome type compressor 101 according to the first embodiment forms a refrigerant circuit together with an evaporator, a condenser, an expansion mechanism, etc., and compresses a high pressure gas refrigerant composed of carbon dioxide gas in the refrigerant circuit. As shown in FIG. 1, mainly a vertically long cylindrical dome-shaped casing 10, a scroll compression mechanism 15, an Oldham ring 39, a guide member 61, a drive motor 16, a lower main The bearing 60, the suction pipe 19, and the discharge pipe 20 are configured.

  Hereinafter, the components of the high-low pressure dome compressor 101 will be described in detail.

<Details of components of high-low pressure dome compressor 101>
(1) Casing The casing 10 is an airtight container, and has a substantially cylindrical trunk casing portion 11, a bowl-shaped upper wall portion 12 that is welded to the upper end of the trunk casing portion 11 in an airtight manner, and a trunk portion. It has a bowl-shaped bottom wall portion 13 which is welded in an airtight manner to the lower end portion of the casing portion 11. The casing 10 mainly accommodates a scroll compression mechanism 15 that compresses a gas refrigerant and a drive motor 16 that is disposed below the scroll compression mechanism 15. The scroll compression mechanism 15 and the drive motor 16 are connected by a drive shaft 17 disposed so as to extend in the vertical direction in the casing 10. As a result, a gap space 18 is generated between the scroll compression mechanism 15 and the drive motor 16.

(2) Guide member 61
As shown in FIGS. 1 and 2, the guide member 61 guides the refrigerant gas flowing out from the discharge port 49 of the communication passage 46 to the motor cooling passage 55. The guide member 61 is housed inside the casing 10 and is disposed in the gap space 18 between the scroll compression mechanism 15 and the drive motor 16. Since the guide member 61 is fixed by screwing or press-fitting the guide member 61 to the upper main bearing 32 that is a frame portion, the guide member 61 can be easily assembled.

  As a specific configuration, the guide member 61 includes a refrigerant guide part 62 and a lubricant guide part 63 as shown in FIG. The refrigerant guide 62 has a refrigerant passage 62a for guiding refrigerant gas. The refrigerant passage 62 a communicates between the discharge port 49 of the communication passage 46 and the motor cooling passage 55. The lubricating oil guide portion 63 is supplied to the bottom wall portion 13 of the casing 10 after the lubricating oil rising from the bottom wall portion 13 of the casing 10 through the lubricating oil passage 17a of the drive shaft 17 is supplied to the bearing 34 and the scroll compression mechanism 15. In order to drop, it has a lubricating oil passage 63a for guiding the lubricating oil.

  As shown in FIG. 4, the refrigerant passages 62 a are formed, for example, at four locations on the outer peripheral surface of the guide member 61 at equal intervals, and are directly connected to the motor cooling passage 55 on the outer periphery of the stator 51. The refrigerant descending through the refrigerant passage 62a of the guide member 61 descends while cooling the drive motor 16 through the motor cooling passage 55 on the outer periphery of the stator 51 of the drive motor 16, and from below the stator 51, the stator 51 and the rotor. Ascend through the space between 52.

  The refrigerant passage 62a and the lubricating oil passage 63a extend substantially parallel to the axial direction (vertical direction in FIG. 3) of the cylindrical main body 64 of the guide member 61.

  The guide member 61 is configured by integrally forming a refrigerant guide portion 62 and a lubricant guide portion 63. Thereby, space saving and cost reduction are possible.

  A drive motor 16 having a stator 51 fixed to the casing 10 that is a sealed container and a rotor 52 that rotates inside the stator 51 is installed below the guide member 61. The guide member 61 is made of an insulating material such as polyimide at least near the stator 51. Specifically, the entire guide member 61 is integrally formed of a highly insulating synthetic resin. Thereby, the guide member 61 can be disposed close to or in contact with the stator 51, and the entire compressor can be downsized. The guide member 61 shown in FIGS. 1 and 2 is disposed such that the lower end thereof is in contact with the stator 51.

  As shown in FIG. 3, the outer peripheral surface 65 of the guide member 61 is arranged so as to be continuous with the outer peripheral surface of the stator 51, so that the refrigerant gas and the lubricating oil can flow smoothly.

  Moreover, the guide member 61 shown in FIG. 3 has a cylindrical main body 64. The refrigerant guide 62 and the lubricant guide 63 are formed on the outer peripheral surface 65 of the cylindrical main body 64.

  The width W1 of the refrigerant passage 62a and the width W2 of the lubricating oil passage 63a are appropriately set according to the dimensions of the hermetic compressor 1, but in particular, the width W1 of the refrigerant passage 62a for smooth flow of refrigerant and lubricating oil. Is 20 to 50% of the outer circumferential length of the guide member 61, and the width W2 of the lubricating oil passage 63a is preferably 3 to 15% of the outer circumferential length of the guide member 61.

(3) Scroll Compression Mechanism As shown in FIG. 1, the scroll compression mechanism 15 mainly includes a housing 23, a fixed scroll 24 disposed in close contact with the housing 23, and a movable meshing with the fixed scroll 24. And a scroll 26. Hereinafter, the components of the scroll compression mechanism 15 will be described in detail.

a) Housing The housing 23 is press-fitted and fixed to the body casing portion 11 over the entire outer circumferential surface in the circumferential direction. That is, the body casing part 11 and the housing 23 are in close contact with each other in an airtight manner over the entire circumference. For this reason, the inside of the casing 10 is partitioned into a high pressure space 28 below the housing 23 and a low pressure space 29 above the housing 23. The fixed scroll 24 is fastened and fixed to the housing 23 with bolts 38 so that the upper end surface is in close contact with the lower end surface of the fixed scroll 24. The housing 23 is formed with a housing recess 31 that is recessed at the center of the upper surface and an upper main bearing 32 that extends downward from the center of the lower surface. The upper main bearing 32 is formed with a bearing hole 33 penetrating in the vertical direction. The drive shaft 17 is rotatably fitted in the bearing hole 33 via a bearing 34.

b) Fixed Scroll The fixed scroll 24 mainly includes a mirror plate 24a and a spiral (involute) wrap 24b formed on the lower surface of the mirror plate 24a. The end plate 24 a is formed with a discharge passage 41 that communicates with the compression chamber 40 and an enlarged recess 42 that communicates with the discharge passage 41. The discharge passage 41 is formed so as to extend in the vertical direction at the central portion of the end plate 24a. The enlarged concave portion 42 is constituted by a concave portion that is provided in the upper surface of the end plate 24a and that extends in the horizontal direction. A lid 44 is fastened and fixed to the upper surface of the fixed scroll 24 by bolts 44 a so as to close the enlarged concave portion 42. And the muffler space 45 which consists of an expansion chamber which silences the driving | running | working sound of the scroll compression mechanism 15 by covering the expansion recessed part 42 with the cover body 44 is formed. The fixed scroll 24 and the lid 44 are sealed by being brought into close contact via a packing (not shown).

c) Moveable Scroll As shown in FIG. 1, the movable scroll 26 is mainly formed on the end plate 26a, a spiral (involute) wrap 26b formed on the upper surface of the end plate 26a, and the lower surface of the end plate 26a. It comprises a pin bearing 26c and groove portions 26d formed at both ends of the end plate 26a. The movable scroll 26 is supported by the housing 23 by fitting an Oldham ring 39 into the groove. Further, the upper end of the drive shaft 17 is fitted into the pin bearing 26c. The movable scroll 26 revolves in the housing 23 without being rotated by the rotation of the drive shaft 17 by being incorporated in the scroll compression mechanism 15 in this way. The wrap 26b of the movable scroll 26 is meshed with the wrap 24b of the fixed scroll 24, and a compression chamber 40 is formed between the contact portions of both the wraps 24b and 26b. In the compression chamber 40, the volume between the laps 24b and 26b contracts toward the center as the movable scroll 26 revolves. In the high-low pressure dome type compressor 101 according to the present embodiment, the gas refrigerant is compressed in this way.

d) Others In the scroll compression mechanism 15, a communication passage 46 is formed across the fixed scroll 24 and the housing 23. The communication passage 46 is formed so that a scroll-side passage 47 formed in the fixed scroll 24 and a housing-side passage 48 formed in the housing 23 communicate with each other. The upper end of the communication passage 46, that is, the upper end of the scroll side passage 47 opens into the enlarged recess 42, and the lower end of the communication passage 46, that is, the lower end of the housing side passage 48 opens into the lower end surface of the housing 23. In other words, the lower end opening of the housing side passage 48 constitutes a discharge port 49 through which the refrigerant in the communication passage 46 flows out into the gap space 18.

(4) Oldham ring The Oldham ring 39 is a member for preventing the rotation of the movable scroll as described above, and is fitted into an Oldham groove (not shown) formed in the housing 23. The Oldham groove is an oval groove and is disposed at a position facing each other in the housing 23.

(5) Drive Motor The drive motor 16 is a DC motor in the present embodiment, and mainly includes an annular stator 51 fixed to the inner wall surface of the casing 10 and a slight gap (air gap) inside the stator 51. The rotor 52 is rotatably accommodated with a passage). The drive motor 16 is arranged such that the upper end of the coil end 53 formed on the upper side of the stator 51 is at substantially the same height as the lower end of the upper main bearing 32 of the housing 23. Reference numeral 56 denotes a coil end.

  In the stator 51, a copper wire is wound around a tooth portion, and a coil end 53 is formed above and below. Further, the outer peripheral surface of the stator 51 is provided with core cut portions that are notched at a plurality of locations from the upper end surface to the lower end surface of the stator 51 and at predetermined intervals in the circumferential direction. The core cut portion forms a motor cooling passage 55 extending in the vertical direction between the body casing portion 11 and the stator 51.

  The rotor 52 is drivably coupled to the movable scroll 26 of the scroll compression mechanism 15 via a drive shaft 17 disposed at the axial center of the body casing portion 11 so as to extend in the vertical direction.

(6) Lower Main Bearing The lower main bearing 60 is disposed in the lower space below the drive motor 16. The lower main bearing 60 is fixed to the body casing portion 11 and constitutes a lower end bearing of the drive shaft 17, and the drive shaft 17 is supported by the bearing portion 60 a of the lower main bearing 60.

(7) Suction Pipe The suction pipe 19 is for guiding the refrigerant in the refrigerant circuit to the scroll compression mechanism 15 and is fitted into the upper wall portion 12 of the casing 10 in an airtight manner. The suction pipe 19 penetrates the low pressure space 29 in the vertical direction, and an inner end portion is fitted into the fixed scroll 24.

(8) Discharge pipe The discharge pipe 20 is for discharging the refrigerant in the casing 10 to the outside of the casing 10, and is fitted into the body casing portion 11 of the casing 10 in an airtight manner. The discharge pipe 20 has an inner end 36 that is formed in a cylindrical shape extending in the vertical direction and is fixed to the lower end of the housing 23. The inner end opening of the discharge pipe 20, that is, the inflow port, is opened downward.

<Features of First Embodiment>
(1)
In the hermetic compressor 1 of the first embodiment, the guide member 61 is configured by integrally forming a refrigerant guide portion 62 and a lubricant guide portion 63. This can save space and reduce manufacturing costs. That is, it becomes possible to install the guide member 61 that is a separation mechanism for the lubricating oil and the refrigerant gas in a limited space inside the compressor. Further, by integrating the lubricating oil passage 63a and the refrigerant passage 62a in the guide member 61, it is not necessary to provide a lubricating oil pipe separately from the refrigerant guide member as in the prior art, and the cost is reduced by reducing the number of parts. It becomes possible.

  Further, the refrigerant and the lubricating oil separately flow through the refrigerant passage 62a and the lubricating oil passage 63a, respectively, so that the lubricating oil discharged to the outside of the compressor together with the refrigerant can be reduced.

  Furthermore, the guide member 61 can rectify the flow of the lubricating oil and the flow of the refrigerant gas into a one-way flow (a flow from the top to the bottom on the outer periphery of the stator 51 in FIG. 1).

(2)
In the first embodiment, below the guide member 61, the drive motor 16 having the stator 51 fixed to the casing 10 that is a sealed container and the rotor 52 that rotates inside the stator 51 is installed. Is made of an insulating material at least at a portion close to the stator 51. Thereby, the guide member 61 can be disposed close to or in contact with the stator 51, and the entire compressor can be downsized.

(3)
In the first embodiment, since the guide member 61 is made of an insulating material at least at a portion close to the stator 51, the guide member 61 contacts the stator 51 as shown in FIGS. Can also be arranged. Thereby, the airtightness between the inside and outside of the guide member 61 is improved, and mixing of the refrigerant gas and the lubricating oil can be prevented.

(4)
In the first embodiment, as shown in FIG. 3, the outer peripheral surface 65 of the guide member 61 is arranged so as to be continuous with the outer peripheral surface of the stator 51, thereby facilitating the flow of the refrigerant gas and the lubricating oil. It is possible.

(5)
Moreover, in the first embodiment, the guide member 61 shown in FIG. 3 has a cylindrical main body 64. The refrigerant guide 62 and the lubricant guide 63 are formed on the outer peripheral surface 65 of the cylindrical main body 64. Thereby, between the inner wall of the casing 10 and the outer peripheral surface 65 of the guide member 61, it is possible to form the lubricating oil passage 63a in which the lubricating oil falls and the refrigerant passage 62a through which the refrigerant gas passes. As a result, the number of parts can be reduced, and the structure of the guide member 61 is simplified. In addition, since the structure of the guide member 61 is simplified, the guide member 61 can be easily manufactured.

(6)
Further, in the first embodiment, the refrigerant passage 62a width W1 is 20 to 50% of the outer peripheral length of the guide member 61, and the width W2 of the lubricating oil passage 63a is 3% of the outer peripheral length of the guide member 61. Since it is ˜15%, it is possible to ensure a smooth flow of refrigerant and lubricating oil.

(7)
The hermetic compressor 1 of the first embodiment uses carbon dioxide as a compression medium (refrigerant). Carbon dioxide has a higher pressure than other refrigerants, but by using the guide member 61, It is possible to smoothly circulate the inside of the casing in a state where the refrigerant and the lubricating oil are separated from each other.

<Modification of First Embodiment>
(A)
In the first embodiment, the entire guide member 61 is integrally formed of a highly insulating synthetic resin, but the present invention is not limited to this, and the surface of the metal base of the guide member 61 It may be configured by coating with a highly insulating synthetic resin. . Also in this case, the guide member 61 can be disposed close to or in contact with the stator 51, and the entire compressor can be downsized.

(B)
In the first embodiment, the guide member 61 is fixed by screwing or press-fitting the guide member 61 to the upper main bearing 32 that is the frame portion, but the present invention is not limited to this. The guide member 61 is pressed into the casing 10 and illustrated, or the guide member 61 is manufactured from a metal material (for example, manufactured by coating the surface of the metal base of the guide member 61 with a highly insulating synthetic resin. However, the outward elastic force of the guide member 61 may be used to map the inner wall surface of the casing 10. Also in this case, the assembly of the guide member 61 is facilitated.

(C)
Furthermore, in the first embodiment, the lubricating oil passage 63a of the guide member 61 ends at the upper surface of the stator 51 of the drive motor 16, but the present invention is not limited to this, and the lubricating oil passage of the guide member 61 63a may be extended to the lower side of the stator 51. In this case, it is preferable because the lubricating oil can be returned to the bottom wall portion 13 of the casing 10 more smoothly.

(D)
In the first embodiment, as shown in FIG. 4, after the refrigerant descending through the refrigerant passage 62 a of the guide member 61 descends through the motor cooling passage 55 on the outer peripheral portion of the stator 51, the stator 51 starts from below the stator 51. However, the present invention is not limited to this. As a modified example, as shown in FIGS. 5 to 6, the refrigerant may be raised from a part of the outer peripheral portion of the stator 51.

  For example, as shown in FIGS. 5 to 6, at least one third of the cross-sectional area of the refrigerant passages 55 a and 55 b on the outer periphery of the stator 51 is a downflow passage 55 a that guides the refrigerant gas to the motor lower space, and other portions. As the upward flow passage 55b for raising the refrigerant gas, a plurality of (for example, four) refrigerant passages 62a (see FIG. 3) of the guide member 61 are formed, and the downward flow passage 55a on the outer periphery of the stator 51 and the upward circulation are respectively formed. Directly connected to the road 55b. Furthermore, a plurality of (for example, four) lubricating oil passages 63 a (see FIG. 3) of the guide member 61 are formed and directly connected to the lubricating oil passage 57 on the outer periphery of the stator 51.

  If the refrigerant is also raised from a part of the outer peripheral portion of the stator 51 as shown in FIGS. 5 to 6, the hermetic compressor 1 is provided by the guide member 61 in which the lubricating oil passage 63a and the refrigerant passage 62a are integrated. The total number of parts can be reduced, and the manufacturing cost can be reduced.

  Further, since the lubricating oil passage 63a and the refrigerant passage 62a can be completely separated, the effect of separating the lubricating oil can be increased.

Furthermore, since the flow of the refrigerant to the outer peripheral portion and the inner peripheral portion of the stator 51 can be ensured, the drive motor 16 can be actively cooled.
[Second Embodiment]
In the second embodiment, as shown in FIGS. 7 to 9, the refrigerant passage 162 a of the guide member 161 has an arc-shaped section 162 b extending along the circumferential direction of the guide member 161 on the outer peripheral surface 165 of the cylindrical main body 164. In other respects, the configuration is the same as that of the guide member 61 provided in the hermetic compressor 1 of the first embodiment.

  Each of the guide members 161 shown in FIGS. 7 to 9 includes a refrigerant guide portion 162 and a lubricant guide portion 163. The refrigerant guide portion 162 has a refrigerant passage 162a that guides the refrigerant gas. The refrigerant passage 162a communicates between the discharge port 49 of the communication passage 46 of FIG. 1 and the motor cooling passage 55. The lubricating oil guide portion 163 is provided on the bottom wall of the casing 10 after the lubricating oil rising from the bottom wall portion 13 of the casing 10 of FIG. 1 through the lubricating oil passage 17a of the drive shaft 17 is supplied to the bearing 34 and the scroll compression mechanism 15. In order to return to the portion 13, a lubricating oil passage 163 a for guiding the lubricating oil is provided.

  The guide member 161 shown in FIGS. 7 to 9 is also configured by integrally forming the refrigerant guide portion 162 and the lubricating oil guide portion 163, like the guide member 61 of the first embodiment. Thereby, space saving and cost reduction are possible.

  Further, in the guide member 161 shown in FIGS. 7 to 9, since the refrigerant passage 162a has an arc-shaped section 162b extending along the outer peripheral surface 165 of the cylindrical main body 164, minute splashes of lubricating oil flowing along with the refrigerant are When the refrigerant passes through the arc-shaped section 162b, it is effectively centrifuged from the refrigerant.

  In the guide member 161 shown in FIG. 7, the arc-shaped section 162b of the refrigerant passage 162a is branched from the straight section 162c to form an arc-shaped section 162b. The microscopic splashes of the lubricating oil that have been centrifuged are gathered together on the inner wall of the refrigerant passage 162a to form oil droplets larger than the microsplashes and fall down the casing 10.

  Further, the guide member 161 shown in FIG. 7 has a bypass flow path 162d that causes the lubricating oil, which has been centrifuged when the refrigerant passes through the arc-shaped section 162b, to flow obliquely downward into the lubricating oil path 163a. Furthermore, the separation effect between the refrigerant and the lubricating oil is enhanced.

  As another example of the arc-shaped section 162b, as shown in FIG. 8, even when the intermediate portion of the refrigerant passage 162a is formed into the arc-shaped section 162b, the minute splashes of the lubricating oil flowing together with the refrigerant may be When passing through 162b, it is effectively centrifuged from the refrigerant. Also in this case, the microscopic splashes of the lubricating oil that have been centrifuged are gathered on the inner wall of the refrigerant passage 162a and become oil droplets that are larger than the microsplashes, and fall below the casing 10.

  Furthermore, as still another example of the arc-shaped section 162b, as shown in FIG. 6, one wall 162e of the refrigerant passage 162a extends linearly, and the other wall 162f extends spirally to form an arc shape over the entire length. Even if it constitutes section 162b, the minute splash of lubricating oil which flows with the refrigerant is effectively centrifuged from the refrigerant when the refrigerant passes through arcuate section 162b. Also in this case, the microscopic splashes of the lubricating oil that have been centrifuged are gathered on the inner wall of the refrigerant passage 162a and become oil droplets that are larger than the microsplashes, and fall below the casing 10.

<Features of Second Embodiment>
(1)
In the guide member 161 of the second embodiment, the coolant passage 162a has an arc-shaped section 162b extending in the week direction or spiral (spiral) along the outer peripheral surface 165 of the cylindrical body 164. Fine oil droplets can be effectively centrifuged from the refrigerant as it passes through the arcuate section 162b. Therefore, the effect of separating the lubricating oil from the refrigerant is increased.
(2)
Further, since the guide member 161 shown in FIG. 7 has the bypass flow path 162d for flowing the centrifuged lubricating oil to the lubricating oil path, the effect of separating the refrigerant and the lubricating oil is further enhanced.
[Third Embodiment]
As shown in FIG. 10, the guide member 261 of the third embodiment is different in that it further has a protruding portion 264 that protrudes into the refrigerant flow. It is common with the guide member 61 provided in the hermetic compressor 1 of the embodiment.

  Each of the guide members 261 shown in FIG. 10 includes a refrigerant guide portion 262 and a lubricant guide portion 263. The refrigerant guide portion 262 has a refrigerant passage 262a for guiding refrigerant gas. The refrigerant passage 262a communicates between the discharge port 49 of the communication passage 46 of FIG. 1 and the motor cooling passage 55. The lubricating oil guide portion 263 is provided on the bottom wall of the casing 10 after the lubricating oil rising from the bottom wall portion 13 of the casing 10 in FIG. 1 through the lubricating oil passage 17a of the drive shaft 17 is supplied to the bearing 34 and the scroll compression mechanism 15. In order to return to the portion 13, a lubricating oil passage 263 a for guiding the lubricating oil is provided.

  Similarly to the guide member 61 of the first embodiment, the guide member 261 shown in FIG. 10 is also configured by integrally forming the refrigerant guide portion 262 and the lubricant guide portion 263. Thereby, space saving and cost reduction are possible.

  Furthermore, the guide member 261 shown in FIG. 10 further has a protruding portion 264 that protrudes into the flow of the refrigerant rising inside the guide member 261. When the flow of the refrigerant descends from the outer peripheral side of the stator 51 and rises from the inside as in the first embodiment (FIG. 1), the rising refrigerant gas collides with the protruding portion 264 of the guide member 261. The fine powder of lubricating oil contained in the refrigerant gas can be separated from the refrigerant gas. The separated fine splashes of lubricating oil gather near the lower surface of the protrusion 264 and become oil droplets larger than the fine splashes and fall below the casing 10.

  The protrusion 264 may have any shape that has an oil separation effect by temporarily interrupting the flow of the refrigerant gas rising inside the stator 51. For example, the protrusion 264 may have a perforated disk or a plurality of fins arranged radially. What is necessary is just to have such a shape. Further, the protruding portion 264 may be arranged with the inner peripheral side of the protruding portion 264 inclined upward or downward in consideration of conditions such as the oil separation effect and the flow rate of the refrigerant gas.

  The protruding portion 264 is integrally formed with the guide member 261, but a separate protruding portion 264 may be attached to the guide member main body.

<Features of Third Embodiment>
In the third embodiment, since the guide member 261 has the protruding portion 264 that protrudes into the flow of the refrigerant that rises inside, the rising refrigerant gas collides with the protruding portion 264 of the guide member 261. As a result, it is possible to separate the fine powder of lubricating oil contained in the refrigerant gas from the refrigerant gas.

  The present invention can be widely applied to a hermetic compressor having a compression medium passage and a lubricating oil passage inside a hermetic container.

1 is an overall configuration diagram of a hermetic compressor according to a first embodiment of the present invention. FIG. 2 is an enlarged sectional view of the vicinity of a guide member in FIG. 1. The perspective view of the guide member of FIG. Sectional drawing which shows the flow of the refrigerant | coolant inside the hermetic compressor of FIG. The top view which shows arrangement | positioning of the refrigerant path and lubricating oil path of the stator outer periphery in the modification of 1st Embodiment. Sectional drawing which shows the flow of the refrigerant | coolant inside the hermetic compressor in the modification of 1st Embodiment. The perspective view of the guide member which has an arc-shaped area in the refrigerant path concerning 2nd Embodiment of this invention. The perspective view of the guide member which has an arc-shaped area in the refrigerant path concerning 2nd Embodiment of this invention. The perspective view of the guide member which has an arc-shaped area in the refrigerant path concerning 2nd Embodiment of this invention. Sectional drawing of the guide member which has a protrusion part which protrudes in the refrigerant | coolant concerning 3rd Embodiment of this invention.

1 Sealed compressor 10 Casing (sealed container)
16 Drive motor 51 Stator 52 Rotor 61, 161, 261 Guide members 62, 162, 262 Compressed medium guide portions 62a, 162a, 262a Compressed medium passages 63, 163, 263 Lubricating oil guide portions 63a, 163a, 263a Lubricating oil passage 162b Circle Arc-shaped section 162d Bypass passage 264 Projection

Claims (9)

A sealed container (10);
A compressed medium guide portion (62, 162, 262) having a compressed medium passage (62a, 162a, 262a) that is housed in the sealed container (10) and guides the compressed medium, and a lubricating oil that guides the lubricating oil A guide member (61, 161, 261) having a lubricant guide portion (63, 163, 263) having a passage (63a, 163a, 263a);
A drive motor having a stator (51) installed below the guide members (61, 161, 261) and fixed to the sealed container (10), and a rotor (52) rotating inside the stator (51) ( 16)
With
The guide member (61, 161, 261) is configured by integrally forming the compression medium guide portion (62, 162, 262) and the lubricant guide portion (63, 163, 263) , At least a portion close to the stator (51) is made of an insulating material,
Hermetic compressor (1). The guide members (61, 161, 261) are in contact with the stator (51),
The hermetic compressor (1) according to claim 1 . The outer peripheral surface of the guide member (61, 161, 261) is disposed so as to be continuous with the outer peripheral surface of the stator (51).
The hermetic compressor (1) according to claim 1 or 2 . The guide member (61, 161, 261) has a cylindrical main body,
The compression medium guide part (62, 162, 262) and the lubricating oil guide part (63, 163, 263) are formed on the outer peripheral surface of the cylindrical body,
The hermetic compressor (1) according to any one of claims 1 to 3 . The compressed medium passage (162a) has an arcuate section (162b) extending along the outer peripheral surface of the cylindrical body.
The hermetic compressor (1) according to claim 4 . The guide member (161) further includes a bypass passage (162d) for allowing the lubricating oil centrifuged in the arc-shaped section (162b) to flow from the arc-shaped section (162b) to the lubricating oil path (163a). Yes,
The hermetic compressor (1) according to claim 5 . The width of the compressed medium passage (62a, 162a, 262a) is 20 to 50% of the outer peripheral length of the guide member (61, 161, 261),
The width of the lubricating oil passage (63a, 163a, 263a) is 3 to 15% of the outer peripheral length of the guide member (61, 161, 261).
The hermetic compressor (1) according to any one of claims 1 to 6 . The guide member (261) further includes a protrusion (264) that protrudes into the flow of the compression medium.
The hermetic compressor (1) according to any one of claims 1 to 4 . Using carbon dioxide as the compression medium,
The hermetic compressor (1) according to any one of claims 1 to 8 .

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