JP6762785B2 - Open refrigerant compressor - Google Patents

Description

The present invention relates to an open-type refrigerant compressor that compresses a refrigerant gas, and more particularly to an open-type refrigerant compressor that prevents wear of a seal member provided at a portion where a drive shaft protrudes from a housing.

In a refrigerant compressor (compressor) that compresses refrigerant gas in a car air conditioner or the like, a compression mechanism is housed inside a housing made of aluminum alloy or the like, and a drive shaft for driving this compression mechanism protrudes from one surface of the housing. A pulley with an electromagnetic clutch provided on the protruding portion is driven by the engine or the like via a belt. Such a refrigerant compressor is called an open type because a shaft hole for projecting a drive shaft is formed in the housing thereof. On the other hand, a pressure vessel in which a compression mechanism and a drive motor are built in a closed pressure vessel is called a closed type.

In an open type refrigerant compressor, a lip seal (oil seal with a lip) is provided on the protruding portion of the drive shaft, that is, the shaft hole of the housing to prevent the refrigerant gas inside the housing from leaking to the outside. .. This lip seal is lubricated by the lubricating oil mixed with the refrigerant gas, but it is conceivable that the lubrication to the lip seal is insufficient during low load operation or the like when the circulation amount of the refrigerant gas decreases. In that case, the tip of the lip may be worn, which may cause refrigerant gas and oil leakage.

In order to solve this concern, for example, as disclosed in Patent Document 1, a guide groove or a communication hole leading to the lip seal and the bearing member in the vicinity thereof is formed on the inner wall surface of the housing, and the inside of the housing is formed during operation. There is an open type refrigerant compressor in which the refrigerant gas and the lubricating oil flowing through the housing are supplied to the lip seal and the bearing member through these oil passages.

Japanese Unexamined Patent Publication No. 2005-23849

However, in the past, it has not been clarified how much refrigerant gas and lubricating oil flowing inside the housing are supplied to the lip seal as described above, and for example, the lip seal may be worn due to a temporary shortage of lubricating oil. It was left behind.

The present invention has been made to solve such a problem, and a seal member provided at a portion where a drive shaft protrudes from a housing can be reliably lubricated by a lubricating oil contained in a refrigerant gas, and the seal member can be made. It is an object of the present invention to provide an open type refrigerant compressor capable of preventing wear.

The open-type refrigerant compressor according to the present invention drives a housing, a suction port formed in the housing, a compression mechanism provided inside the housing for compressing a refrigerant gas containing lubricating oil, and the compression mechanism. A drive shaft to be used, a seal member provided with a shaft hole in which the drive shaft projects outward from the housing to prevent leakage of the refrigerant gas from the inside to the outside of the housing, and the seal member from the inside of the housing. The refrigerant gas is provided with a refrigerant supply passage connected to the refrigerant gas and a refrigerant gas distribution unit for distributing the refrigerant gas introduced into the housing from the suction port to the refrigerant supply passage side and the compression mechanism side. The distribution rate of the refrigerant gas by the distribution unit is set so that the distribution amount to the refrigerant supply passage side is larger than the distribution amount to the compression mechanism side.

According to the open-type refrigerant compressor having the above configuration, the refrigerant gas introduced into the housing from the suction port is distributed to the refrigerant supply passage side and the compression mechanism side by the refrigerant gas distribution unit. The refrigerant gas distributed to the refrigerant supply passage side flows to the seal member, and the seal member is lubricated by the lubricating oil contained in the refrigerant gas. On the other hand, the refrigerant gas distributed to the compression mechanism side is compressed by the compression mechanism to become compressed refrigerant gas, which is discharged from the discharge port formed in the housing.

Since the distribution rate of the refrigerant gas by the refrigerant gas distribution unit is set so that the distribution amount to the refrigerant supply passage side is larger than the distribution amount to the compression mechanism side, a sufficient amount of refrigerant gas is applied to the seal member. Be supplied. Therefore, it is possible to preferentially lubricate the seal member with the lubricating oil contained in the refrigerant gas, improve the lubrication state of the seal member, and prevent wear. The refrigerant gas supplied to the seal member then flows to the compression mechanism side, lubricates other mechanisms and the like, and then is compressed by the compression mechanism to become compressed refrigerant gas.

In the open type refrigerant compressor having the above configuration, the distribution rate of the refrigerant gas by the refrigerant gas distribution unit is such that the entire amount of the refrigerant gas introduced into the housing from the suction port flows to the refrigerant supply passage side. May be set to. As a result, the entire amount of the refrigerant gas sucked from the suction port first flows to the seal member, so that the amount of lubricating oil supplied to the seal member is maximized, thereby maximizing the lubrication state of the seal member. Can be done.

In the open-type refrigerant compressor having the above structure, the refrigerant gas distribution unit, Ru mounted as a separate part in the housing. By doing so, the amount of the refrigerant gas distributed can be freely set by appropriately setting the shape of the refrigerant gas distribution unit.

In the open-type refrigerant compressor having the above structure, the coolant supply passage, at least a portion of the refrigerant gas distributor in the refrigerant supply groove formed on an inner surface of the housing Ru it is formed by being covered state. In this way, since the shape of the refrigerant gas distribution portion may be any shape that can cover the refrigerant supply groove formed on the inner surface of the housing, the shape of the refrigerant gas distribution portion can be simplified.

In the open type refrigerant compressor having the above configuration, the end portion of the refrigerant supply passage communicates with the seal space formed between the seal member and the bearing member arranged inside the seal member. You may. By doing so, the refrigerant gas supplied to the seal space passes through the gap of the bearing member and flows out to the compression mechanism side, so that the bearing member can be lubricated well and even if the amount of the refrigerant supplied to the seal member becomes excessive. , It is possible to prevent the refrigerant from leaking to the outside due to excessive pressure of the refrigerant gas applied to the seal member.

In the open type refrigerant compressor having the above configuration, a refrigerant discharge passage for guiding the refrigerant gas from the seal member to the compression mechanism side may be provided. In this way, the refrigerant gas and lubricating oil supplied to the seal member are guided to the compression mechanism side by the refrigerant discharge passage, and a steady flow of the refrigerant gas and lubricating oil is formed to lubricate each part of the open type refrigerant compressor. Can be done well.

As described above, according to the open type refrigerant compressor according to the present invention, the seal member provided at the portion where the drive shaft protrudes from the housing can be reliably lubricated by the lubricating oil contained in the refrigerant gas, and the seal member is worn. Can be prevented.

It is a partial vertical sectional view of the open type compressor which shows one Embodiment of this invention. It is an exploded perspective view which shows the refrigerant gas distribution part by the arrow II of FIG. It is a vertical cross-sectional view of the vicinity of the sub bearing along the line III-III of FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a partial vertical sectional view of an open scroll compressor (open refrigerant compressor) showing an embodiment of the present invention. The open scroll compressor 1 according to the present embodiment is for, for example, a car air conditioner installed in an engine room of an automobile, driven by engine power, and configured to compress refrigerant gas. Not limited to this, the present invention may be applied to an open compressor used for living space air conditioning, a refrigeration system, a heat pump type hot water supply system, and the like.

The open scroll compressor 1 includes a substantially cylindrical housing 2 made of an aluminum alloy or the like. The housing 2 is composed of a housing body 2A forming the main body and a housing cover 2B fixed with bolts or the like so as to airtightly close an opening provided at one end of the housing body 2A. The other end of the housing body 2A (not shown) is closed.

The scroll compression mechanism 4 (compression mechanism) and the drive shaft 5 are housed in the internal space S1 of the housing 2. The outer peripheral surface of the housing 2 is provided with a suction port 3 for sucking the refrigerant gas before being compressed and a discharge port (not shown) for discharging the refrigerant gas compressed by the scroll compression mechanism 4. ..

The drive shaft 5 is rotatably supported by the housing cover 2B via a main bearing 6 and a sub-bearing 7 (bearing member). As the main bearing 6, for example, a single row deep groove ball bearing is used, and as the sub bearing 7, for example, a needle bearing is used. One end of the drive shaft 5 projects outward through a shaft hole 8 formed in the housing cover 2B. The sub-bearing 7 is press-fitted into the shaft hole 8, and the lip seal 9 (seal member) is press-fitted to the outer side of the sub-bearing 7. The lip seal 9 includes a lip 9a that is tilted toward the sub-bearing 7 and is lightly pressed against the outer peripheral surface of the drive shaft 5.

A pulley 12 is rotatably installed on the outer peripheral portion of the tip of the housing cover 2B via a pulley bearing 11, and a belt (non-belt) is provided between the pulley 12 and a drive pulley provided in a drive source such as an engine (not shown). (Shown) is wrapped. The clutch plate 13 fixed to the tip of the drive shaft 5 faces the outer end surface of the pulley 12 in close proximity, and the electromagnetic clutch 14 fixed to the housing cover 2B is excited so as to be located inside the pulley 12. Then, the clutch plate 13 is attracted to the pulley 12 side and frictionally engages with the outer end surface of the pulley 12, and the rotation of the pulley 12 is transmitted to the drive shaft 5 to rotate the drive shaft 5.

At the rear end of the drive shaft 5, a crank pin 5a eccentric to the central axis of the drive shaft 5 by a predetermined dimension is integrally formed, and the crank pin 5a scrolls via the drive bush 16 and the drive bearing 17. It is fitted to a boss 18a formed on the back surface of the swivel scroll 18 of the compression mechanism 4.
The scroll compression mechanism 4 has a known configuration in which a swivel scroll 18 and a fixed scroll (not shown) are meshed with each other by shifting the phase by 180 degrees. When the drive shaft 5 rotates, the scroll compression mechanism 4 swivels by the action of the rotation prevention mechanism 19. The scroll 18 is driven to revolve with respect to the fixed scroll, and a pair of compression chambers (not shown) formed between both scrolls gradually reduce their volume while moving from the outer peripheral position to the central position. ..
Therefore, the refrigerant gas sucked from the suction port 3 into the internal space S1 of the housing 2 is sucked and compressed by the scroll compression mechanism 4, discharged from the discharge port, and supplied to a condenser or the like (not shown). The member 20 is a balancer weight.

Lubricating oil (refrigerating machine oil) is contained in the refrigerant gas in a predetermined ratio, and the mist of this lubricating oil causes the main bearing 6, the sub bearing 7, the lip seal 9, the crank pin 5a, the drive bush 16, and the drive bearing 17. Each internal mechanism such as the rotation prevention mechanism 19 and the scroll compression mechanism 4 is lubricated. The lip seal 9 is a sealing member that prevents the leakage of the refrigerant gas and the lubricating oil from the inside to the outside of the housing 2, and the wear of the lip 9a is prevented by being lubricated by the oil contained in the refrigerant gas. However, there is a risk that the tip of the lip 9a will be worn due to insufficient lubrication of the lip seal 9 during low-load operation where the circulation amount of the refrigerant gas is reduced.

In order to prevent such wear of the lip seal 9, the open scroll compressor 1 gives priority to the refrigerant gas sucked from the suction port 3 toward the lip seal 9 side over the internal space S1 side of the housing 2. It is configured to flow to. The configuration is as follows.

A refrigerant introduction space S2 is formed inside the suction port 3. In this refrigerant introduction space S2, the bottom of the refrigerant passage hole 2Bb (conventional existing hole) formed in the insertion flange 2Ba of the housing cover 2B to be inserted into the opening of the housing body 2A is partitioned as shown in FIG. It is defined as a room having a predetermined volume (about several cc) by closing with a plate 22 (refrigerant gas distribution unit). The suction port 3 and the refrigerant introduction space S2 are positioned at the uppermost portion of the housing 2, for example. Conventionally, since the partition plate 22 did not exist, the suction port 3 communicated directly with the internal space S1 via the refrigerant passage hole 2Bb.

As shown in FIG. 2, the partition plate 22 is attached to the inside of the housing 2 (2B) with two bolts 23 as separate parts. The partition plate 22 has, for example, a shape obtained by bending and molding a sheet metal material in a stepped shape, and as shown in FIGS. It has a second vertical plane 22c and a second horizontal plane 22d. The second horizontal plane 22d is the bottom surface of the refrigerant introduction space S2, and bolt holes 22e are bored at both ends of the first vertical surface 22a in the horizontal direction.

As shown in FIGS. 1 and 3, for example, four refrigerant guide grooves 25 are formed on the inner peripheral surface of the shaft hole 8 into which the sub bearing 7 is press-fitted at equal intervals in the circumferential direction. These refrigerant guide grooves 25 are arranged, for example, at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock positions (see FIG. 3) on the dial of the clock, and their tips are a lip seal 9 and a sub bearing 7. It communicates with the seal space S3 formed between the two, and the rear end communicates with the internal space S1 of the housing 2. As shown in FIG. 3, the sub-bearing 7 includes an outer ring member 7a, an inner ring member 7b, a plurality of roller-shaped rolling members 7c arranged between the inner and outer ring members 7a and 7b, and a plurality of rolling members. It has a cage 7d that holds the members 7c at equal intervals. An oil supply hole 7e is formed in the outer ring member 7a at a position consistent with the refrigerant guide groove 25.

Further, as shown in FIGS. 1 and 3, the refrigerant guide groove 25 at the positions of 3 o'clock, 6 o'clock, and 9 o'clock extends in the radial direction from the axis of the drive shaft 5 and extends into the internal space S1 of the housing 2. A refrigerant discharge passage 27 communicating with the above is formed. Further, three refrigerant discharge passages 28 penetrating the insertion flange 2Ba of the housing cover 2B are formed in accordance with the positions of these three refrigerant discharge passages 27. These refrigerant discharge passages 27 and 28 are passages that guide the refrigerant gas supplied to the lip seal 9 to the scroll compression mechanism 4 side as will be described later.

As shown in FIG. 2, an overlay portion 31 having a height of several millimeters is formed on the upper inner wall surface of the portion where the shaft hole 8 opens to the internal space S1 side when viewed from the inner side of the housing 2 (2B). A refrigerant supply groove 32a extending in the vertical direction as shown in FIG. 1 is formed in the central portion in the width direction of the build-up portion 31, and bolt holes 33 are formed on both sides thereof. It is not essential to form the overlay portion 31, and the overlay portion 31 may be omitted if the refrigerant supply groove 32a can be formed. Further, a refrigerant supply groove 32b extending in the horizontal direction from the upper end portion of the refrigerant supply groove 32a toward the main bearing 6 side is formed (see FIGS. 1 and 2). One refrigerant guide passage 29 formed in the same manner as the above-mentioned three refrigerant discharge passages 28 communicates with the refrigerant supply groove 32b, and the other end of the refrigerant guide passage 29 communicates with the refrigerant introduction space S2. There is.

The first vertical surface 22a of the partition plate 22 is applied to the overlay portion 31 and fastened to the bolt holes 33 with two bolts 23. As a result, as described above, the bottom portion of the refrigerant introduction space S2 is closed by the second horizontal plane 22d of the partition plate 22. Further, the refrigerant supply grooves 32a and 32b are each covered with the first vertical surface 22a and the first horizontal plane 22b of the partition plate 22, and the refrigerant supply grooves 32a and 32b are isolated from the internal space S1, respectively. It becomes. In FIG. 1, the second horizontal plane 22d of the partition plate 22 is sandwiched between the outer peripheral surface of the main bearing 6 and the housing cover 2B. However, two partition plates 22 are provided with the main bearing 6 as a boundary. It may be divided into two parts, and each of them may be individually fixed to the inner surface of the housing 2.

The uppermost refrigerant guide groove 25 (at the position of 12 o'clock shown in FIG. 3), the refrigerant supply groove 32a, the refrigerant supply groove 32b, and the refrigerant induction passage 29 are provided from the refrigerant introduction space S2 to the lip seal 9. A connecting refrigerant supply passage 35 is formed. Since the end portion of the refrigerant supply passage 35 is a refrigerant guide groove 25 formed on the inner peripheral surface of the shaft hole 8, it leads to the seal space S3 between the lip seal 9 and the sub bearing 7. Then, the partition plate 22 functions as a refrigerant gas distribution unit that distributes the refrigerant gas introduced into the refrigerant introduction space S2 from the suction port 3 to the refrigerant supply passage 35 side and the scroll compression mechanism 4 side.

The distribution rate of the refrigerant gas by the partition plate 22 in the present embodiment is set so that the distribution amount to the refrigerant supply passage 35 side is much larger than the distribution amount to the scroll compression mechanism 4 side. That is, the flow resistance of the refrigerant gas from the refrigerant introduction space S2 to the refrigerant supply passage 35 side is significantly smaller than the flow resistance of the refrigerant gas from the refrigerant introduction space S2 to the scroll compression mechanism 4 side. The shape is defined.

For example, in the present embodiment, since the bottom of the refrigerant introduction space S2 is completely blocked by the second horizontal plane 22d of the partition plate 22, the distribution rate of the refrigerant gas is approximately the same as that of the refrigerant gas introduced into the refrigerant introduction space S2. The entire amount is set to flow to the refrigerant supply passage 35 side. However, in reality, since the sealing means is not provided between each surface 22a to 22d of the partition plate 22 and the refrigerant introduction space S2 (housing cover 2B) and there is a gap between the two 22 and 2B, the refrigerant A small amount of the refrigerant gas flowing into the introduction space S2 leaks from this gap to the scroll compression mechanism 4 side (internal space S1 side).

In the open scroll compressor 1 configured as described above, when the drive shaft 5 rotates, the scroll compression mechanism 4 sucks the refrigerant gas, so that a negative pressure is generated in the internal space S1 of the housing 2, and this negative pressure is generated. The refrigerant gas is introduced from the suction port 3 into the refrigerant introduction space S2. The introduced refrigerant gas is distributed to the refrigerant supply passage 35 side and the scroll compression mechanism 4 side (internal space S1 side) by the partition plate 22, but in the present embodiment, the refrigerant gas introduced into the refrigerant introduction space S2. It is set so that substantially the entire amount of the above is distributed to the refrigerant supply passage 35 side.

That is, the refrigerant gas distributed from the refrigerant introduction space S2 to the refrigerant supply passage 35 side flows in from the refrigerant induction passage 29, which is the starting point of the refrigerant supply passage 35, and flows into the refrigerant supply grooves 32a and 32b and the ends of the refrigerant supply passage 35. It flows into the seal space S3 through the upper refrigerant guide groove 25 (refrigerant guide groove 25 at the 12 o'clock position shown in FIG. 3), which is a part, and the mist-like lubricating oil contained in this refrigerant gas causes the lip seal 9 and The sub-bearing 7 is lubricated. When the refrigerant gas passes through the upper refrigerant guide groove 25, it also flows into the sub-bearing 7 from the oil supply hole 7e formed in the outer ring member 7a of the sub-bearing 7 to lubricate the sub-bearing 7.

The refrigerant gas (lubricating oil) that has finished lubricating the sub-bearing 7 is the refrigerant guide groove 25 at the 3 o'clock, 6 o'clock, and 9 o'clock positions shown in FIG. 3, and three extending from these three refrigerant guide grooves 25. It is discharged to the internal space S1 side through the refrigerant discharge passage 27 and the refrigerant discharge passage 28 matching the refrigerant discharge passage 27, and merges with the refrigerant gas passing through the gap of the partition plate 22 from the refrigerant introduction space S2. This refrigerant gas passes through the main bearing 6 and lubricates it, and then is supplied to the crank pin 5a, the drive bush 16, the drive bearing 17, the rotation prevention mechanism 19, the scroll compression mechanism 4, and the like to lubricate them. After that, the refrigerant gas is sucked into the scroll compression mechanism 4, compressed to become compressed refrigerant gas, discharged from the discharge port formed in the housing 2, and supplied to the demand part such as a condenser.

In this way, the distribution amount of the refrigerant gas flowing from the refrigerant introduction space S2 to the refrigerant supply passage 35 side by the partition plate 22 is the distribution amount of the refrigerant gas from the refrigerant introduction space S2 to the scroll compression mechanism 4 side (internal space S1). Since it is set to be larger than the above, a sufficient amount of refrigerant gas can be supplied to the lip seal 9. Therefore, even during low-load operation in which the circulation amount of the refrigerant gas is reduced, the lip seal 9 is preferentially lubricated by the lubricating oil contained in the refrigerant gas to improve the lubrication state of the lip seal 9 and the lip 9a. Wear can be prevented.

In the present embodiment, since the distribution rate of the refrigerant gas by the partition plate 22 is set so that substantially the entire amount of the refrigerant gas introduced into the refrigerant introduction space S2 flows to the refrigerant supply passage 35 side, the refrigerant sucked from the suction port 3 Almost all of the gas first flows through the lip seal 9. Therefore, the amount of lubricating oil supplied to the lip seal 9 is maximized, the lubrication state of the lip seal 9 can be improved to the maximum, and wear of the lip 9a can be prevented.

Since the partition plate 22 is attached to the inside of the housing 2 as a separate component, the distribution amount of the refrigerant gas can be freely set by appropriately setting the shape of the partition plate 22. For example, the refrigerant introduction space S2 or the housing cover 2B (building portion 31) is formed by drilling a hole in the second horizontal surface 22d of the partition plate 22 or bending (deforming) the partition plate 22 (22a to 22d). The above-mentioned refrigerant gas distribution rate can be easily changed by making a change such as widening the gap between the refrigerant gas and the like.

A part of the refrigerant supply passage 35 is formed by covering the refrigerant supply grooves 32a and 32b formed on the inner surface of the housing 2 with the first vertical surface 22a and the first horizontal plane 22b of the partition plate 22. There is. According to this configuration, the shape of the partition plate 22 may be a flat shape that can cover the refrigerant supply grooves 32a and 32b, so that the shape of the partition plate 22 can be simplified. For example, in the present embodiment, the partition plate 22 is made of a sheet metal material, and the surfaces 22a to 22d thereof are flattened to simplify the shape, so that the production is easy.

Since the refrigerant guide groove 25, which is the end of the refrigerant supply passage 35, communicates with the seal space S3 formed between the lip seal 9 and the sub bearing 7, the refrigerant gas supplied to the lip seal 9 is sub. It passes through the gap of the bearing 7 and flows out to the scroll compression mechanism 4 side. Therefore, the sub-bearing 7 is satisfactorily lubricated, and even if the amount of the refrigerant supplied to the lip seal 9 becomes excessive, the pressure of the refrigerant gas applied to the lip seal 9 becomes excessive to prevent the refrigerant from leaking to the outside. can do.

Further, by providing the refrigerant discharge passages 27 and 28 for guiding the refrigerant gas from the lip seal 9 to the scroll compression mechanism 4 side, the refrigerant gas and the lubricating oil supplied to the lip seal 9 are scroll-compressed by the refrigerant discharge passages 27 and 28. By guiding to the mechanism 4 side and forming a steady flow of the refrigerant gas and the lubricating oil, each part of the open scroll compressor 1 can be satisfactorily lubricated.

As described above, according to the open scroll compressor 1 according to the present embodiment, the refrigerant gas contains the lip seal 9 provided in the portion (shaft hole 8) where the drive shaft 5 protrudes from the housing 2. Lubricating oil can be used to ensure lubrication, and wear of the lip seal 9 (lip 9a) can be prevented.

It should be noted that the present invention is not limited to the configuration of the above-described embodiment, and changes and improvements can be made as appropriate, and the embodiments to which the changes and improvements have been made are also included in the scope of rights of the present invention. And.
For example, the basic internal structure of the open scroll compressor 1 and the positional relationship of parts do not necessarily have to be the same as those shown in the present embodiment.
In particular, in the above embodiment, the refrigerant introduction space S2 formed inside the suction port 3 closes the bottom of the refrigerant passage hole 2Bb formed in the insertion flange 2Ba of the housing cover 2B by the second horizontal plane 22d of the partition plate 22. However, for example, the refrigerant introduction space S2 may be formed only by the shape of the partition plate 22.
Further, instead of the scroll type refrigerant compression mechanism, another type of refrigerant compression mechanism such as a rotary type, a vane type, or a swash plate type may be used.

1 Open type refrigerant compressor 2 Housing 3 Suction port 4 Scroll compression mechanism (compression mechanism)
5 Drive shaft 7 Sub bearing (bearing member)
8 Shaft hole 9 Lip seal (seal member)
22 Partition plate (refrigerant gas distributor)
27, 28 Refrigerant discharge passages 32a, 32b Refrigerant supply groove 35 Refrigerant supply passage S1 Internal space S2 Refrigerant introduction space S3 Seal space

Claims (4)

With the housing
The suction port formed in the housing and
A compression mechanism provided inside the housing to compress the refrigerant gas containing lubricating oil,
The drive shaft that drives the compression mechanism and
A seal member in which the drive shaft is provided in a shaft hole protruding from the housing to the outside to prevent the refrigerant gas from leaking from the inside to the outside of the housing.
A refrigerant supply passage that connects the inside of the housing to the seal member,
A refrigerant gas distribution unit that distributes the refrigerant gas introduced into the housing from the suction port to the refrigerant supply passage side and the compression mechanism side.
With
The distribution rate of the refrigerant gas by the refrigerant gas distribution unit is set so that the distribution amount to the refrigerant supply passage side is larger than the distribution amount to the compression mechanism side .
The refrigerant gas distributor is attached to the inside of the housing as a separate component.
The refrigerant supply passage is an open type refrigerant compressor in which at least a part thereof is formed by covering the refrigerant gas distribution portion with the refrigerant supply groove formed on the inner surface of the housing . The first aspect of claim 1, wherein the distribution rate of the refrigerant gas by the refrigerant gas distribution unit is set so that the entire amount of the refrigerant gas introduced into the inside of the housing from the suction port flows to the refrigerant supply passage side. Open type refrigerant compressor. The open type according to claim 1 or 2 , wherein the end portion of the refrigerant supply passage communicates with a seal space formed between the seal member and a bearing member arranged inside the seal member. Refrigerant compressor. The open type refrigerant compressor according to any one of claims 1 to 3 , wherein a refrigerant discharge passage for guiding the refrigerant gas from the seal member to the compression mechanism side is provided.

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