WO2018012411A1

WO2018012411A1 - Open-type refrigerant compressor

Info

Publication number: WO2018012411A1
Application number: PCT/JP2017/024878
Authority: WO
Inventors: 創佐藤; 善彰宮本; 尚夫水野; 章浩野口; 後藤　孝; 敏幸鹿内; 秀作後藤
Original assignee: 三菱重工サーマルシステムズ株式会社
Priority date: 2016-07-11
Filing date: 2017-07-06
Publication date: 2018-01-18
Also published as: EP3418569A4; EP3418569B1; JP2018009457A; EP3418569A1; JP6762785B2

Abstract

An open-type refrigerant compressor (1) equipped with: a housing (2); an intake port (3); a compression mechanism (4) that compresses a refrigerant gas containing lubricating oil in the interior of the housing (2); a drive shaft (5) for driving the compression mechanism; a seal member (9) that is provided in a shaft hole (8) through which the drive shaft (5) protrudes to the outside from the housing (2), and that prevents refrigerant gas from leaking to the outside from the interior of the housing (2); a refrigerant supply passage (35) connecting the interior of the housing (2) and the seal member (9); and a refrigerant gas distribution unit (22) that distributes refrigerant gas, which has been introduced into the interior of the housing (2)from the intake port (3), to the refrigerant supply passage (35) side and the compression mechanism (4) side. The refrigerant gas distribution ratio of the refrigerant gas distributed by the refrigerant gas distribution unit (22) is set such that the amount distributed to the refrigerant supply passage (35) side is greater than the amount distributed to the compression mechanism (4) side.

Description

Open type refrigerant compressor

The present invention relates to an open-type refrigerant compressor that compresses 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.

A refrigerant compressor (compressor) that compresses refrigerant gas in a car air conditioner or the like has a compression mechanism housed inside a housing formed of aluminum alloy or the like, and a drive shaft that drives the compression mechanism protrudes from one surface of the housing. A pulley with an electromagnetic clutch provided at the protruding portion is driven by an 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. On the other hand, a structure in which a compression mechanism and a drive motor are built in a sealed pressure vessel is called a sealed type.

In an open type refrigerant compressor, a lip seal (oil seal with a lip) is provided at a protruding portion of the drive shaft, that is, a shaft hole of the housing, to prevent the refrigerant gas inside the housing from leaking to the outside. . The lip seal is lubricated by the lubricating oil mixed with the refrigerant gas, but it is considered that the lip seal is insufficiently supplied during low load operation where the circulation amount of the refrigerant gas is reduced. In that case, there is a concern that the tip of the lip is worn, causing 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 that leads to a lip seal and a bearing member in the vicinity of the lip seal is formed on the inner wall surface of the housing. There are open-type refrigerant compressors in which refrigerant gas and lubricating oil flowing through are supplied to the lip seal and the bearing member through these oil passages.

JP 2005-23849 A

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

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

An open-type refrigerant compressor according to the present invention includes a housing, a suction port formed in the housing, a compression mechanism that is provided inside the housing and compresses refrigerant gas containing lubricating oil, and drives the compression mechanism A drive shaft, a seal member provided in a shaft hole projecting outward from the housing, and preventing leakage of the refrigerant gas from the inside of the housing to the outside, and the seal member from the inside of the housing A refrigerant supply passage that leads to the refrigerant gas distribution portion, and a refrigerant gas distribution portion that distributes the refrigerant gas introduced into the housing from the suction port into the refrigerant supply passage side and the compression mechanism side, and the refrigerant gas The distribution ratio 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 configured as described above, 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 a compressed refrigerant gas, and is discharged from a discharge port formed in the housing.

The distribution ratio 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, so that a sufficient amount of refrigerant gas is applied to the seal member. Supplied. Therefore, the seal member can be preferentially lubricated with the lubricating oil contained in the refrigerant gas, and the lubrication state of the seal member can be improved to prevent wear. The refrigerant gas supplied to the seal member then flows to the compression mechanism side, lubricates other mechanisms, and is then compressed by the compression mechanism to become a compressed refrigerant gas.

In the open-type refrigerant compressor configured as described above, the distribution ratio 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. As a result, since the entire amount of refrigerant gas sucked from the suction port first flows to the seal member, the supply amount of lubricating oil to the seal member becomes the maximum amount, thereby maximizing the lubrication state of the seal member. Can do.

In the open-type refrigerant compressor having the above-described configuration, the refrigerant gas distribution unit may be attached as a separate part inside the housing. If it carries out like this, the distribution amount of a refrigerant gas can be freely set by setting the shape of a refrigerant gas distribution part suitably.

In the open-type refrigerant compressor configured as described above, at least a part of the refrigerant supply passage is formed by mounting the refrigerant gas distribution portion in a refrigerant supply groove formed on the inner surface of the housing. May be. In this case, the shape of the refrigerant gas distribution part can be simplified as long as the shape of the refrigerant gas distribution part can cover the refrigerant supply groove formed in the inner surface of the housing.

In the open-type refrigerant compressor having the above-described configuration, the end portion of the refrigerant supply passage communicates with a seal space formed between the seal member and a bearing member disposed inside the seal member. May be. In this way, since the refrigerant gas supplied to the seal space passes through the clearance of the bearing member and flows out to the compression mechanism side, the bearing member can be well lubricated and even if the amount of refrigerant supplied to the seal member becomes excessive Further, it is possible to prevent the refrigerant from being leaked 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-described configuration, a refrigerant discharge passage that guides the refrigerant gas from the seal member to the compression mechanism side may be provided. In this way, the refrigerant gas and the 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 the lubricating oil is formed, thereby lubricating each part of the open type refrigerant compressor. Can be performed satisfactorily.

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

It is a partial longitudinal cross-sectional view of the open type compressor which shows one Embodiment of this invention. It is a disassembled perspective view which shows a refrigerant gas distribution part by the II arrow view of FIG. FIG. 3 is a longitudinal sectional view in the vicinity of a sub-bearing along the line III-III in FIG. 1.

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

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

A scroll compression mechanism 4 (compression mechanism) and a drive shaft 5 are accommodated in the internal space S1 of the housing 2. The outer peripheral surface of the housing 2 is provided with a suction port 3 through which refrigerant gas before being compressed is sucked, and a discharge port (not shown) through which refrigerant gas compressed by the scroll compression mechanism 4 is discharged. .

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 protrudes outside through a shaft hole 8 formed in the housing cover 2B. The sub bearing 7 is press-fitted into the shaft hole 8, and a lip seal 9 (seal member) is press-fitted on the outer side of the sub bearing 7. The lip seal 9 includes a lip 9 a that is inclined 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 periphery of the front end of the housing cover 2B via a pulley bearing 11, and a belt (non-shown) is provided between the pulley 12 and a drive pulley provided in a drive source such as an engine (not shown). (Shown) is wound. A clutch plate 13 fixed to the front end 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 positioned 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 so that the drive shaft 5 rotates.

A crank pin 5 a that is eccentric by a predetermined dimension with respect to the central axis of the drive shaft 5 is integrally formed at the rear end of the drive shaft 5. The crank pin 5 a is scrolled via a drive bush 16 and a drive bearing 17. A boss 18 a formed on the rear surface of the orbiting scroll 18 of the compression mechanism 4 is fitted.
The scroll compression mechanism 4 has a known configuration in which the orbiting scroll 18 and a fixed scroll (not shown) are engaged with each other with a phase difference of 180 degrees. The scroll 18 is driven to revolve with respect to the fixed scroll, and a pair of compression chambers (not shown) formed between the two scrolls gradually reduce its volume while moving from the outer peripheral position to the center position. .
Therefore, the refrigerant gas sucked into the internal space S1 of the housing 2 from the suction port 3 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.

The refrigerant gas contains lubricating oil (refrigerating machine oil) at a predetermined ratio, and the main bearing 6, sub bearing 7, lip seal 9, crank pin 5a, drive bush 16, drive bearing 17 by this lubricating oil mist. The internal mechanisms such as the rotation prevention mechanism 19 and the scroll compression mechanism 4 are lubricated. The lip seal 9 is a seal member that prevents leakage of refrigerant gas and lubricating oil from the inside of the housing 2 to the outside, and wear of the lip 9a is prevented by being lubricated by the oil contained in the refrigerant gas. However, there is a possibility that the tip of the lip 9a may 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 preferentially uses the refrigerant gas sucked from the suction port 3 to the lip seal 9 side rather than the internal space S <b> 1 side of the housing 2. It is comprised so that it may flow. The configuration is as follows.

A refrigerant introduction space S2 is formed inside the suction port 3. This refrigerant introduction space S2 is a partition as shown in FIG. 2 at the bottom of the refrigerant passage hole 2Bb (conventional existing hole) drilled in the insertion flange 2Ba of the housing cover 2B inserted into the opening of the housing body 2A. The room is defined as a room having a predetermined volume (about several cc) by being blocked by the plate 22 (refrigerant gas distributor). The suction port 3 and the refrigerant introduction space S2 are positioned at the uppermost part of the housing 2, for example. Conventionally, since the partition plate 22 does not exist, the suction port 3 communicates with the internal space S1 as it is through 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 a sheet metal material in a staircase shape, and as illustrated in FIGS. 1 and 2, in order from the center side of the housing 2, a first vertical surface 22a, a first horizontal surface 22b, A second vertical surface 22c and a second horizontal surface 22d are provided. The second horizontal surface 22d is a surface formed by the bottom of the refrigerant introduction space S2, and bolt holes 22e are formed at both ends in the horizontal direction of the first vertical surface 22a.

As shown in FIGS. 1 and 3, on the inner peripheral surface of the shaft hole 8 into which the sub bearing 7 is press-fitted, for example, four refrigerant guiding grooves 25 are formed at equal intervals in the circumferential direction. These coolant guide grooves 25 are disposed at, for example, the 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock positions on the dial of the watch (see FIG. 3), and the tips of the refrigerant guide grooves 25 are the lip seal 9 and the sub-bearing 7. 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 disposed between the inner and

outer ring members

7a and 7b, and the plurality of rolling elements. And a holder 7d for holding the members 7c at equal intervals. An oil supply hole 7e is formed in the outer ring member 7a at a position aligned with the refrigerant guide groove 25.

As shown in FIGS. 1 and 3, the refrigerant guide groove 25 located at the 3 o'clock, 6 o'clock, and 9 o'clock positions extends in the radial direction from the axis of the drive shaft 5, and the internal space S <b> 1 of the housing 2. A refrigerant discharge passage 27 communicating with the refrigerant 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 the 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, a built-up 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 on the inner space S1 side when viewed from the inner side of the housing 2 (2B). In addition, a refrigerant supply groove 32a extending in the vertical direction shown in FIG. 1 is formed at the center in the width direction of the built-up portion 31, and bolt holes 33 are formed on both sides thereof. It is not essential to form the built-up portion 31, and the built-up portion 31 may be omitted as long as the coolant supply groove 32 a can be formed. Further, a refrigerant supply groove 32b extending in the horizontal direction from the upper end of the refrigerant supply groove 32a toward the main bearing 6 is formed (see FIGS. 1 and 2). The refrigerant supply groove 32b communicates with one refrigerant guide passage 29 formed in the same manner as the three refrigerant discharge passages 28, and the other end of the refrigerant guide passage 29 communicates with the refrigerant introduction space S2. Yes.

The first vertical surface 22 a of the partition plate 22 is applied to the built-up portion 31 and is fastened to the bolt hole 33 with two bolts 23. As a result, the bottom of the refrigerant introduction space S2 is closed by the second horizontal surface 22d of the partition plate 22 as described above. The

refrigerant supply grooves

32a and 32b are respectively covered with the first vertical surface 22a and the first horizontal surface 22b of the partition plate 22, and the

refrigerant supply grooves

32a and 32b are isolated from the internal space S1. It becomes. In FIG. 1, the second horizontal surface 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 is also possible to divide each of them into an inner surface of the housing 2 individually.

The uppermost refrigerant guide groove 25 (at the 12 o'clock position shown in FIG. 3), the refrigerant supply groove 32a, the refrigerant supply groove 32b, and the refrigerant guide passage 29 are connected to the lip seal 9 from the refrigerant introduction space S2. A connected refrigerant supply passage 35 is formed. Since the end portion of the coolant supply passage 35 is a coolant guide groove 25 formed on the inner peripheral surface of the shaft hole 8, it communicates with the seal space S 3 between the lip seal 9 and the sub bearing 7. 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.

In the present embodiment, the distribution ratio of the refrigerant gas by the partition plate 22 is set so that the distribution amount to the refrigerant supply passage 35 side is significantly 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 entirely closed by the second horizontal surface 22d of the partition plate 22, the distribution ratio of the refrigerant gas is substantially equal to that of the refrigerant gas introduced into the refrigerant introduction space S2. The whole amount is set to flow toward the refrigerant supply passage 35. However, in actuality, no sealing means is provided between the surfaces 22a to 22d of the partition plate 22 and the refrigerant introduction space S2 (housing cover 2B), and a gap exists between the two

surfaces

22 and 2B. Some amount of the refrigerant gas flowing into the introduction space S2 leaks from the gap to the scroll compression mechanism 4 side (internal space S1 side).

In the open type scroll compressor 1 configured as described above, when the drive shaft 5 rotates, the scroll compression mechanism 4 sucks the refrigerant gas, thereby generating a negative pressure in the internal space S1 of the housing 2, and this negative pressure. As a result, 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 (inside the internal space S1) by the partition plate 22, but in this embodiment, the refrigerant gas introduced into the refrigerant introduction space S2. Is set to be 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 guide passage 29 which is the starting point of the refrigerant supply passage 35, and is connected to the

refrigerant supply grooves

32a and 32b and the end of the refrigerant supply passage 35. The refrigerant flows into the seal space S3 through the upper refrigerant guide groove 25 (the refrigerant guide groove 25 at the 12 o'clock position shown in FIG. 3), and the lip seal 9 is caused by the mist-like lubricating oil contained in the refrigerant gas. The sub bearing 7 is lubricated. When the refrigerant gas passes through the upper refrigerant guide groove 25, the refrigerant gas also flows into the sub bearing 7 from the oil supply hole 7 e formed in the outer ring member 7 a of the sub bearing 7, and lubricates 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 three o'clock, six o'clock, and nine o'clock positions shown in FIG. 3, and the three that extend from these three refrigerant guide grooves 25. The refrigerant discharge passage 27 and the refrigerant discharge passage 28 matched therewith are discharged to the internal space S1 side, and merge with the refrigerant gas that has passed through the gap between the partition plates 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. Thereafter, the refrigerant gas is sucked into the scroll compression mechanism 4 and compressed to become compressed refrigerant gas, which is discharged from a discharge port formed in the housing 2 and supplied to a demand section such as a condenser.

As described above, 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 changed to the distribution amount of the refrigerant gas from the refrigerant introduction space S2 to the scroll compression mechanism 4 side (internal space S1). Therefore, a sufficient amount of refrigerant gas can be supplied to the lip seal 9. Therefore, even during a low load operation where 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, and the lubrication state of the lip seal 9 is improved to improve the lip 9a. Wear can be prevented.

In the present embodiment, since the distribution ratio 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 toward the refrigerant supply passage 35, the refrigerant sucked from the suction port 3 Substantially all of the gas initially flows to the lip seal 9. For this reason, the supply amount of the lubricating oil to the lip seal 9 becomes the maximum amount, and the lubricating state of the lip seal 9 can be maximized to prevent the lip 9a from being worn.

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

A part of the coolant supply passage 35 is formed by covering the

coolant supply grooves

32 a and 32 b formed on the inner surface of the housing 2 with the first vertical surface 22 a and the first horizontal surface 22 b of the partition plate 22. Yes. According to this configuration, the shape of the partition plate 22 may be a flat shape that can cover the

coolant supply grooves

32a and 32b, and thus the shape of the partition plate 22 can be simplified. For example, in the present embodiment, the partition plate 22 is formed of a sheet metal material, and the surfaces 22a to 22d are flattened to simplify the shape. Therefore, the manufacturing is easy.

The refrigerant guide groove 25, which is the end portion of the refrigerant supply passage 35, communicates with a seal space S 3 formed between the lip seal 9 and the sub bearing 7, so that the refrigerant gas supplied to the lip seal 9 is sub It passes through the clearance of the bearing 7 and flows out to the scroll compression mechanism 4 side. Therefore, the sub-bearing 7 is well lubricated, and even if the amount of refrigerant supplied to the lip seal 9 becomes excessive, the refrigerant gas pressure applied to the lip seal 9 is prevented from excessively leaking to the outside. can do.

Further, by providing the

refrigerant discharge passages

27 and 28 for introducing the refrigerant gas from the lip seal 9 to the scroll compression mechanism 4 side, the refrigerant gas and 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 refrigerant gas and lubricating oil, each part of the open scroll compressor 1 can be lubricated satisfactorily.

As described above, according to the open-type scroll compressor 1 according to the present embodiment, the lip seal 9 provided in the portion (shaft hole 8) where the drive shaft 5 protrudes from the housing 2 is included in the refrigerant gas. Lubricating oil can be reliably lubricated 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 can be appropriately changed or improved. Embodiments with such changes and improvements are also included in the scope of the right of the present invention. And
For example, the basic internal structure of the open scroll compressor 1 and the positional relationship of components are not necessarily 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 surface 22d of the partition plate 22. However, the refrigerant introduction space S2 may be configured only by the shape of the partition plate 22, for example.
Further, instead of the scroll type refrigerant compression mechanism, other types of refrigerant compression mechanisms such as a rotary type, a vane type, and a swash plate type may be used.

DESCRIPTION OF SYMBOLS 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 distribution part)
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

A housing;
A suction port formed in the housing;
A compression mechanism provided inside the housing and compressing a refrigerant gas containing lubricating oil;
A drive shaft for driving the compression mechanism;
The drive shaft is provided in a shaft hole projecting outward from the housing, and a seal member for preventing leakage of the refrigerant gas from the inside of the housing to the outside;
A refrigerant supply passage connected from 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 into the refrigerant supply passage side and the compression mechanism side;
With
The distribution ratio of the refrigerant gas by the refrigerant gas distribution unit is an open type refrigerant compressor in which the distribution amount to the refrigerant supply passage side is set to be larger than the distribution amount to the compression mechanism side.
The distribution ratio of the refrigerant gas by the refrigerant gas distribution unit is set so that the entire amount of the refrigerant gas introduced into the housing from the suction port flows to the refrigerant supply passage side. Open type refrigerant compressor.
The open-type refrigerant compressor according to claim 1 or 2, wherein the refrigerant gas distribution unit is attached as a separate part inside the housing.
The open-type refrigerant compressor according to claim 3, wherein at least a part of the refrigerant supply passage is formed by mounting the refrigerant gas distribution portion in a refrigerant supply groove formed on an inner surface of the housing. .
The end portion of the refrigerant supply passage communicates with a seal space formed between the seal member and a bearing member disposed inside the seal member. Open type refrigerant compressor.
The open type refrigerant compressor according to any one of claims 1 to 5, further comprising a refrigerant discharge passage for guiding the refrigerant gas from the seal member to the compression mechanism side.