JP2004324564A - Compressor and its method of manufacture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size, the number of parts and the cost of a compressor having a centrifugal oil separator and further enhance oil separation effect. <P>SOLUTION: In the compressor C having a separator 40 for separating a liquid from a gas containing a mist, the separator 40 has a space formed within its whole interior space, and is provided with a tubular body 41 for separating the liquid from the gas containing the mist by forming a whirling flow in the interior space. A jet hole 43 for jetting the gas containing the mist from the compression part C is formed in the side wall of the tubular body 41. The jet hole 43 is formed in the direction inclined to the bottom end of the body 41 to the axis of the body 41. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a compressor for refrigerant gas compression suitable for use in, for example, a vehicle air conditioner and a method for manufacturing the same, and more specifically to an oil separator for a compressor and a method for manufacturing the same.
[0002]
[Prior art]
Generally, in an air conditioner for a vehicle, mist-like lubricating oil is contained in a refrigerant gas discharged from a compressor to lubricate each sliding portion such as a compression mechanism and a bearing. However, the lubricating oil contained in the refrigerant gas deteriorates heat conduction in the heat exchanger, and lowers the efficiency of the cooling cycle. Therefore, a structure is adopted in which an oil separator for separating lubricating oil from refrigerant gas is provided in the compressor so that lubricating oil does not flow out of the compressor (for example, see Patent Document 1).
[0003]
Hereinafter, this conventional compressor will be described with reference to FIGS. FIG. 7 is a longitudinal sectional view of the scroll compressor. FIG. 8 is a transverse sectional view showing a section II-II of FIG.
[0004]
In this compressor, a housing includes a compression mechanism for compressing the refrigerant gas, a drive unit for driving the compression mechanism by external power, and a discharge unit for discharging the compressed refrigerant gas.
[0005]
The drive unit includes a drive shaft 107 that transmits external power, a bearing 106 that supports the drive shaft 107, and a scroll mechanism that is a compression mechanism. The scroll mechanism is composed of a fixed scroll 101 and a movable scroll 102. The fixed scroll 101 and the movable scroll 102 are opposed to each other, and a compression chamber 103 is formed by meshing spiral members provided respectively.
[0006]
The discharge section is formed between the housing and the fixed scroll 101, and includes a discharge chamber 138, an oil separator 150, and an oil storage chamber 137. The discharge chamber 138 communicates with the compression chamber 103 of the compression mechanism via a discharge port 132 formed in the center of the fixed scroll 101.
[0007]
As shown in FIG. 8, the oil separator 150 includes an outer cylinder 151 having a bottom and an inner cylinder 152 disposed concentrically inside the outer cylinder 151. A cylindrical hollow portion 153 having an annular cross section is formed between them.
A discharge gas ejection hole 154 is formed on an upper side wall of the outer cylinder 151 facing the discharge chamber 138, so that the discharge chamber 138 communicates with the hollow portion 153. The ejection hole 154 is opened in a tangential direction in an annular cross section of the hollow portion 153. However, the ejection hole 154 is formed so as to be orthogonal to the axis of the outer cylinder 151.
The lower end of the outer cylinder 151 is arranged so as to be exposed to the oil storage chamber 137, and an oil drain hole 155 for dropping the separated lubricating oil into the oil storage chamber 137 is opened on a side wall facing the oil storage chamber 137. ing.
A gas outlet 152d is opened in the upper part of the inner cylinder 152, and an external pipe (not shown) is connected to the gas outlet 152d. The lower part of the inner cylinder 152 is opened in the outer cylinder 151.
[0008]
In the scroll compressor configured as described above, the orbiting scroll 102 orbits by obtaining power, and the refrigerant gas sucked from a suction port (not shown) is sucked into the compression chamber 103, and the pressure in the compression chamber 103 is sequentially increased. Is discharged from the discharge port 132 to the discharge chamber 131.
Then, the refrigerant gas discharged into the discharge chamber 131 is introduced into the oil separator 150 through the discharge gas introduction hole 154. At this time, since the discharge gas introduction hole 154 is opened tangentially to the hollow portion 153, the refrigerant gas introduced into the hollow portion 153 forms a swirling flow as shown by an arrow in FIG. The mist-like lubricating oil having a high specific gravity is urged in the centrifugal direction by the flow, adheres to the inner wall surface of the outer cylinder 151 constituting the outer peripheral surface of the hollow portion 153, flows downward by gravity, and flows from the oil drain hole 155 to the oil storage chamber 137. Is dropped and stored.
On the other hand, the discharge gas from which the lubricating oil has been removed passes through the lower end of the inner cylinder 152 of the oil separator 150 and is sent out to the refrigerant circuit from the gas discharge port 152d.
[0009]
As another configuration of the oil separator different from the above-described oil separator, a compressor adopting a type having no inner cylinder is also used (for example, see Patent Document 2). Such a compressor will be described with reference to FIG. FIG. 9 is a partial sectional view showing the structure of the oil separator of the compressor.
[0010]
An oil separator 248 having a bag-shaped cylindrical separation chamber 248a whose axis extends in the horizontal direction is provided integrally with the rear housing 223, and the discharge chamber 223b and the separation chamber 248a are communicated by an acceleration passage 249. . The acceleration passage 249 opens from below in the cylindrical surface of the separation chamber 248a. The opening of the separation chamber 248a is closed by a partition plate 248f, a communication hole 248g is provided through the center of the partition plate 248f, and is open to the discharge passage 247 side. In order to stabilize the swirling of the compressed refrigerant gas in the separation chamber 248a, the cylinder height H is set to a cylinder diameter L or less.
[0011]
In the compressor configured as described above, the compressed refrigerant gas passes through the acceleration passage 249 from the discharge chamber 223b, is jetted from below into the separation chamber 248a, and swirls along the separation surface 248e. At this time, the oil contained in the compressed refrigerant gas is centrifuged and adheres to the separation surface 248e. The compressed refrigerant gas from which the oil has been separated is discharged from the separation chamber 248a to the discharge passage 247 through the communication hole 248g.
[0012]
[Patent Document 1]
JP-A-11-82353 (page 4, FIG. 2)
[Patent Document 2]
JP-A-10-281060 (page 14, FIG. 17)
[0013]
[Problems to be solved by the invention]
Meanwhile, the conventional compressor as described above has a configuration in which the inner cylinder 152 is inserted into the outer cylinder 151 in order to form an annular space in the outer cylinder 151 of the oil separator 150 and generate a swirling flow. Was required. For this reason, there is a problem in that the number of parts increases due to the insertion of the inner cylinder, and the cost increases.
[0014]
Further, in order to obtain a required flow rate and pressure at the gas outlet 152d, the diameter of the gas outlet 152d must be a predetermined size. However, in the case where the outer cylinder 151 is provided outside the inner cylinder 152 that is adapted to this size, if the gap of the hollow portion 153 that is the gap between the outer diameter of the inner cylinder 152 and the inner diameter of the outer cylinder 151 is not sufficiently large, the turning gas cannot be removed. Since the speed is reduced and the mist-like oil cannot be sufficiently centrifuged, the diameter of the outer cylinder 151 is inevitably increased, which causes a problem that the oil separator 150 is enlarged.
[0015]
To solve such a problem, it is conceivable to adopt a configuration that does not use the inner cylinder as described above. However, such a configuration is restricted by the degree of freedom of design that the cylinder height H of the separation cylinder of the oil separator must be set to be equal to or less than the cylinder diameter L.
[0016]
Furthermore, since the centrifugal oil separator utilizes centrifugal force caused by the swirling flow, it is effective to swirl the refrigerant gas ejected from the acceleration passage 249 with a small radius of curvature. On the other hand, if the diameter L of the cylinder of the separation chamber 248a is large, the centrifugal force due to the rotation cannot be increased, so that there is a problem that the oil separation effect is reduced. Conversely, if the diameter of the acceleration passage 249 is reduced to increase the gas ejection speed in order to maintain the oil separation effect, the throttle resistance in the acceleration passage 249 increases, and eventually the compression efficiency decreases due to the increase in the flow passage resistance. Cause a new problem.
[0017]
Further, since the acceleration passage 249 is opened from below in the separation chamber 248a, the acceleration passage 249 is jetted against the gravity, and the swirling speed of the swirling flow is attenuated, thereby lowering the separation efficiency.
Further, since the separation chamber 248a is formed in the horizontal direction, it is difficult to smoothly discharge the separated lubricating oil by using gravity, and in addition, the separated lubricating oil is ejected from the acceleration passage 249 opened from below. The separated lubricating oil may be scattered by the refrigerant gas, and may again flow out as a mist.
[0018]
The present invention has been made in view of the above problems, and provides a compressor having a separator having a sufficient liquid (oil) separation performance despite its simple configuration, and a method for manufacturing the same. The purpose is to:
[0019]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following solutions.
That is, the compressor according to the first aspect of the present invention includes a compression unit for compressing the mist-containing gas containing the mist-like liquid in the housing, and discharges the mist-containing gas compressed by the compression unit to the outside. In a compressor, a discharge port is formed in the housing, and a separator that separates a liquid from the mist-containing gas is provided between the compression unit and the discharge port. And a cylinder for generating a swirling flow in the internal space to separate the liquid from the mist-containing gas, and the side wall of the cylinder is provided with the mist-containing gas from the compression unit. A jet hole for jetting into a space is formed, and the jet hole is formed so as to be inclined toward a lower end of the cylindrical body with respect to an axis of the cylindrical body.
[0020]
Since the ejection hole is formed so as to be inclined toward the lower end of the cylinder with respect to the axis of the cylinder, the swirling flow generated in the internal space of the cylinder is directed downward of the cylinder. Since the swirling flow is directed downward, the inertial force of the liquid contained in the mist-containing gas is also directed downward. The liquid attached to and separated from the inner wall surface of the cylinder is energized by the swirling flow in addition to gravity and collected below the separator.
Note that the present invention has a configuration in which the entire internal space is a gap, and other members such as an inner cylinder are not disposed.
[0021]
According to a second aspect of the present invention, in the compressor according to the first aspect, an opening is formed in a housing portion located on an extension of the direction in which the ejection hole is formed toward the housing. Is characterized in that sealing means for closing the opening hole is provided.
[0022]
Since the opening is provided in the housing portion located on the extension of the direction in which the ejection hole is formed toward the housing, a positional relationship is established in which the direction in which the ejection hole is formed and the opening coincide with each other on the extension. Such a positional relationship is advantageous when manufacturing the ejection holes. In other words, if a tool is inserted from the outside of the housing along the extension line through the opening to form an ejection hole in the cylinder of the separator, the ejection that inevitably slopes downward with respect to the cylinder A hole will be obtained.
After the ejection hole is formed, by closing the opening hole with sealing means, a housing that is a sealed container is obtained.
[0023]
According to a third aspect of the present invention, in the compressor according to the second aspect, the sealing means is a temperature sensor for detecting a temperature of the mist-containing gas.
[0024]
A temperature sensor is used as sealing means for closing the opening used for forming the ejection hole. As a result, the opening hole is used as a mounting hole for mounting the temperature sensor, and as a result, the number of holes formed in the housing does not increase.
[0025]
According to a fourth aspect of the present invention, in the compressor according to the third aspect, the detection unit of the temperature sensor is disposed near the mist-containing gas flowing into the ejection hole. .
[0026]
The mist-containing gas compressed by the compression unit flows into the outlet of the separator, and is concentrated at the outlet. By arranging the detection unit of the temperature sensor in this portion, a representative temperature of the compressed gas is detected. In particular, even when the amount of gas is reduced for some reason, the gas always passes through the ejection hole, so that the sensitivity of the temperature sensor does not decrease.
[0027]
According to a fifth aspect of the present invention, there is provided a method for manufacturing a compressor, further comprising a compression unit for compressing a mist-containing gas containing a mist-like liquid in a housing, and discharging the mist-containing gas compressed by the compression unit to the outside. A discharge port is formed in the housing, and a separator that separates the liquid from the mist-containing gas is provided between the compression section and the discharge port. An ejection hole for ejecting the mist-containing gas from the compression section into the internal space is formed on a side wall of the body, and the ejection hole is formed in a direction inclined with respect to an axis of the cylindrical body. In the method of manufacturing a compressor for manufacturing a compressor, an opening is formed in a housing, and an axis of the cylindrical body of the separator is inclined with respect to an insertion direction of a tool inserted into the opening. The cylinder is located at Insert the tool into the mouth hole, and forming a jet hole in the side wall portion of the cylindrical body.
[0028]
Since the hole is formed in the side wall of the cylinder with the axis of the cylinder of the separator inclined with respect to the insertion direction of the tool, a hole inclined with respect to the axis of the cylinder is formed. become.
[0029]
The compressor according to claim 6, wherein the compressor includes a compression unit that compresses a gas containing a mist-like liquid, and a separator that separates a liquid from the gas compressed by the compression unit by centrifugation. The separator has a cylindrical body having an inner peripheral surface to which a liquid is attached and a discharge port for discharging the compressed gas to the outside, and an ejection hole for ejecting the gas compressed by the compression section to the inside. And forming the ejection hole on the inner peripheral surface of the cylinder so that at least one of the axis of the ejection hole and the axis of the cylinder has a downward direction component in the direction of gravity. The axis of the ejection hole is provided to be inclined with respect to the axis of the cylindrical body in a direction away from the discharge port, and the inner peripheral surface facing the ejection hole is ejected from the ejection hole in the cylinder. Gas swirl direction opposite to the outlet Characterized in that it is biased fart.
[0030]
An ejection hole is formed on the inner peripheral surface of the cylinder so that at least one of the axis of the ejection hole and the axis of the cylinder has a downward direction component in the direction of gravity, and the axis of the ejection hole is separated from the discharge port. Since the inner peripheral surface facing the ejection hole urges the turning direction of the gas ejected from the ejection hole in the cylinder to the side opposite to the discharge port, The ejected gas does not include any upward component in the direction of gravity, and does not attenuate the force of the ejected gas. In addition, when a downward direction component in the direction of gravity is added during the initial turning state at the time of ejection, the turning speed is accelerated, and the separation efficiency can be increased.
[0031]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment according to the present invention will be described below with reference to FIGS.
FIG. 1 is a longitudinal sectional view of the entire scroll type electric compressor (compressor) according to the present embodiment. FIG. 2 is a sectional view showing an AA section of FIG. FIG. 3 is a sectional view showing a BB section of FIG.
[0032]
The scroll compressor C shown in FIG. 1 is mainly used for compressing a refrigerant gas of a vehicle air conditioner. The scroll compressor C includes a housing 1, a compression unit 4 housed in the housing 1, and an electric motor 5 for driving the compression unit 4. The compression unit 4 and the electric motor 5 are connected by a rotating shaft 6, which has a main bearing 7 on one end (right side in the figure) and an auxiliary bearing 8 on the other end (left side in the figure), The housing 1 is rotatably supported via these components.
[0033]
The housing 1 is disposed horizontally and is a substantially cylindrical hermetic container that surrounds the entire scroll-type electric compressor C. The housing 1 includes a front housing 1a disposed at the other end, a center housing 1b disposed to the right of the front housing 1a, and a rear housing disposed to the right of the center housing 1b and at one end. 1c.
[0034]
The electric motor 5 is housed in the front housing 1a. An intake port 2 is provided in an upper portion on the other end side of the front housing 1 a so as to open toward the rotation shaft 6 in a low-pressure chamber 30 which is a space on the left side of the electric motor 5.
The center housing 1b is formed with a substantially cylindrical support frame for supporting the rotating shaft 6, and a portion protruding in an annular shape on the outer periphery of the support frame is sandwiched between the left and right front housings 1a and the rear housing 1c. Is formed. A main bearing 7 that rotatably holds the rotating shaft 6 is disposed on the inner periphery of the center housing 1b. In the center housing 1b, a refrigerant gas passage 31 formed to penetrate between both end surfaces along the axial direction is formed.
The compression part 4 is accommodated in the rear housing 1c.
[0035]
The compression section 4 is of a scroll type and compresses the refrigerant gas sucked from the suction port 2. The refrigerant gas is a lubricating mist-containing gas containing mist-like lubricating oil for lubricating various parts in the housing 1 of the compressor.
[0036]
The compression section 4 includes a fixed scroll 4b and an orbiting scroll 4a.
The orbiting scroll 4 a has a spiral wrap 11 erected on one surface of the disk 10. A boss 12 is provided on the opposite surface of the disk 10, and the crank pin 9 is connected to the boss 12.
The fixed scroll 4 b has a spiral wrap 21 erected on one surface of the disk 20. A discharge port 22 is provided at the center of the disk 20, and the discharge port 22 is opened and closed by a discharge valve 23.
[0037]
The fixed scroll 4b and the orbiting scroll 4a are combined so that the respective wraps 11 and 21 mesh with each other, and a compression chamber 33 is formed in a space between the wraps. As a space between the rear housing 1c and the compression section 4, a suction chamber 32 connected to the refrigerant gas passage 31 is formed.
[0038]
On the discharge side (the right side in the figure) of the compression section 4, there are provided a discharge chamber 34 and an oil sump chamber 50 limited by the compression section 4 itself.
The oil sump chamber 50 is provided so as to be separated from the upper discharge chamber 34 by a partition formed integrally with the rear housing 1c.
An oil separator 40 is provided in the discharge chamber 34. At the upper end of the oil separator 40, a discharge port 3 opened to the outside of the compressor C is provided.
The oil sump chamber 50 is arranged below the discharge chamber 34 and the oil separator 40. The lower end of the oil separator 40 is open to the oil sump chamber 50.
[0039]
The configuration of the oil separator 40 will be described in detail mainly with reference to FIG.
As shown in FIG. 2, the oil separator 40 is constituted by a separation cylinder (tube) 41 integrally provided inside the rear housing 1c. The separation cylinder 41 has a cylindrical shape, and its axis L1 is inclined with respect to the direction of gravity in a section perpendicular to the axis of the compressor C (that is, the section in FIG. It is arranged to have components. Inside the separation cylinder 41, there is formed a hollow portion 42 which is entirely void. That is, no other member such as the inner cylinder is inserted into the inside of the separation cylinder 41.
[0040]
As shown in FIG. 2, a discharge port 3 opened to the outside of the compressor C and connected to an external pipe is formed at an upper end of the separation cylinder 41, and an oil sump chamber is formed at a lower end of the separation cylinder 41. An oil discharge port 44 opening to 50 is formed.
A shield plate 45 is attached to the lower end of the separation cylinder 41 so as to block the refrigerant gas flowing from the oil discharge port 44 into the oil sump chamber 50.
[0041]
An ejection hole 43 is formed in the side wall of the separation cylinder 41 so as to communicate with the hollow portion 42. As is apparent from FIG. 2, the ejection hole 43 has its axis L2 inclined with respect to the axis L1 of the separation cylinder 41 in the lower end direction of the separation cylinder 41, that is, in the direction away from the discharge port 3. Is formed.
[0042]
Further, as shown in FIG. 3, the ejection hole 43 is formed in a tangential direction along the inner peripheral surface of the separation cylinder 41 in a cross section orthogonal to the axis L1. In addition, in order to give directionality of the fluid flowing through the ejection hole 43, the ejection hole 43 is formed in a thick portion of the separation cylinder 41, and the distance between the ejection holes 43 is ensured. A plurality of ejection holes 43 may be provided to adjust the flow rate.
[0043]
As shown in FIG. 2, the rear housing 1c is provided with an access port (opening hole) 60 that opens to the outside. The access port 60 is located substantially along an extension L2 in the direction in which the ejection holes 43 are formed. The access port 60 is sealed by a plug seal 61. As described later, the blade 43 of the rotary tool is inserted from the access port 60 to machine the ejection hole 43.
[0044]
Hereinafter, the operation of the present embodiment based on the above configuration will be described.
When the electric motor 5 is driven, the orbiting scroll 4a is driven via the rotary shaft 6 and the crank pin 9, and the orbiting scroll 4a orbits on the orbit while being prevented from rotating by the rotation preventing mechanism.
Then, the refrigerant gas containing the mist of the lubricating oil is sucked from the suction port 2, and the refrigerant gas passes through the refrigerant gas passage 51 provided in the center housing 1 b while lubricating each sliding portion such as the main bearing 7 while It is sucked into the compression chamber 33 via the suction chamber 52.
[0045]
When the orbiting scroll 4a orbits, the compression chamber 33 is gradually narrowed accordingly, and the internal gas is compressed, reaches the central portion, and is discharged from the central portion through the discharge port 22 into the discharge chamber 34. The discharge valve 23 opens and closes due to the pressure difference between the compression chamber 33 and the discharge chamber 34. That is, when the pressure in the compression chamber 33 becomes higher than the pressure in the discharge chamber 34, the discharge valve 23 is pushed open and the refrigerant gas flows out. Thereafter, the gas is sent to the oil separator 40 via the discharge chamber 34.
[0046]
The refrigerant gas is ejected from the oil separator 40, that is, an ejection hole 43 provided in a side wall of the separation cylinder 41, into a hollow portion 42 in the separation cylinder 41. At this time, since the ejection hole 43 is opened tangentially to the hollow portion 42 and inclining in the lower end direction with respect to the axis L1, the refrigerant gas ejected to the hollow portion 53 is at the lower end as shown by the arrow in FIG. A swirling flow having a velocity component heading toward is formed.
The mist-like lubricating oil having a higher specific gravity than the refrigerant gas is urged in the centrifugal direction by the swirling flow of the refrigerant gas, adheres to the inner wall surface of the separation cylinder 41, flows downward by gravity, and flows through the oil discharge port 44. The liquid is dropped and stored in the storage chamber 50.
[0047]
Thereafter, the refrigerant gas from which the lubricating oil has been removed loses the swirling speed component and the downward speed component due to the viscous resistance of the refrigerant gas itself, and passes upward through the center of the hollow portion 42 as shown by the arrow in FIG. , To the lower pressure outlet 3.
The lubricating oil stored in the oil sump chamber 50 is supplied to each sliding portion through a lubricating oil supply passage (not shown).
[0048]
With the above operation, the present embodiment has the following effects. That is, since the ejection hole 43 provided in the separation cylinder 41 is tangential to the hollow portion 42 and is inclined at the lower end direction with respect to the axis L1 of the separation cylinder 41, the ejection hole 43 is provided inside the hollow portion 42. A swirl flow energized in the direction opposite to the outlet 3 can be formed having a velocity component towards the lower end. Therefore, even if the oil separator 40 is constituted by a single separation cylinder, it is possible to keep the swirling flow in the hollow portion 42 sufficiently to centrifuge the lubricating oil. As described above, since the inner cylinder is not required, the number of parts and the cost can be reduced. Since there is no need to insert the inner cylinder, the diameter of the separation cylinder 41 can be reduced, which contributes to the reduction in the size of the compressor C as a whole.
[0049]
In addition, the ejection hole 43 of the present embodiment is provided to be inclined toward the lower end relative to the separation cylinder 41 for the purpose of forming a swirling flow having a velocity component toward the lower end of the hollow portion 42 as described above. Things. Therefore, it is needless to say that not only a form in which the ejection hole 43 has a downward component with respect to the direction of gravity but also a form in which the ejection hole 43 has a horizontal or upward direction component as long as the same effect is exerted.
[0050]
Next, a method for manufacturing the compressor according to the present embodiment will be described.
First, the access port 60 is formed in the rear housing 1c in which the separation cylinder 41 is integrally formed. Here, the separation cylinder 41 is at a position inclined with respect to the insertion direction of the rotary tool inserted into the access port 60. Then, the rotating tool is inserted into the access port 60 along the extension line L <b> 2 (see FIG. 2), and the ejection hole 43 is formed in the side wall of the separation cylinder 41.
As described above, since the rotary tool is inserted to form the ejection hole 43 in a state where the separation cylinder 41 is inclined with respect to the direction in which the access port 60 is formed, the separation cylinder 41 is inclined with respect to the axis L1 of the separation cylinder 41. The ejection holes 43 can be easily formed.
[0051]
Next, a modified example of the present embodiment will be described.
As shown in FIG. 4, a temperature sensor 62 may be provided in the access port 60. The access port 60 is provided in the vicinity of the ejection hole 43, and all of the compressed refrigerant gas passes through the ejection hole 43. As a result, all the refrigerant gas is in the vicinity of the detecting portion 62a of the temperature sensor 62. Will also pass through. As a result, the temperature measurement error due to the temperature sensor installation position can be minimized, so that the accuracy of temperature management can be improved. Further, the hole provided for processing the ejection hole 43 can be sealed without requiring an additional component such as a plug seal.
As a means for sealing the access port 60, a pressure release valve is also effective.
[0052]
Further, another modified example of the present embodiment will be described.
As shown in FIG. 5, inside the separation cylinder 41, an inner cylinder 45 with a pipe integrated with an external pipe is provided. That is, the inner cylinder 45 with the pipe includes a lower inner cylinder portion 45a inserted into the separation cylinder 41, and a fixed portion 45b connected to the inner cylinder portion 45a and fitted to the outlet 3 of the separation cylinder 41. And a pipe portion 45c extending from the fixing portion 45b to the outside. By adopting such an inner tube 45 with piping, it is possible to avoid the trouble of assembling such that in the related art, after inserting and fixing the inner tube in the separation tube, an external pipe, which is a separate member, is connected to the outlet. be able to.
[0053]
Further, as shown in FIG. 6, the separation cylinder 41 may be provided such that the axis is in the vertical direction. Also in this case, the ejection hole 43 is opened so as to be tangential to the hollow portion 42 and inclined downward with respect to the axis L1. That is, both the axis L2 of the ejection hole 43 and the axis L1 of the separation cylinder 41 have a downward directional component in the direction of gravity. As a result, the refrigerant gas jetted into the hollow portion 53 forms a swirling flow having a velocity component downward in the direction of gravity, as shown by the arrow in FIG.
[0054]
【The invention's effect】
According to the first aspect of the present invention, the ejection hole is formed in a direction inclined toward the lower end of the cylindrical body, and a swirling flow is generated in the internal space of the cylindrical body toward the lower end. It can be done effectively. That is, the liquid can be sufficiently separated without using a member such as an inner cylinder that promotes liquid separation. Therefore, it is possible to provide a compressor having a simple configuration and a sufficient liquid separating function.
[0055]
According to the second aspect of the present invention, since the formation direction of the ejection hole and the opening hole have a positional relationship coincident with each other on the extension line, a tool is inserted from the opening hole to form the ejection hole. Thus, a jet hole inclined downward can be formed. Since such a simple manufacturing method can be realized, a compressor with low manufacturing cost can be provided.
[0056]
According to the third aspect of the present invention, since the temperature sensor is employed as the sealing means, the opening provided for forming the ejection hole can be effectively used.
[0057]
According to the fourth aspect of the present invention, since the detecting portion of the temperature sensor is arranged near the mist-containing gas flowing into the ejection hole, it is possible to accurately measure the gas temperature.
[0058]
According to the fifth aspect of the present invention, since the ejection hole is formed in a state where the cylindrical body is inclined with respect to the insertion direction of the tool inserted into the opening hole, the inclined ejection hole is easily formed. can do.
[0059]
According to the invention described in claim 6, the ejection hole is formed on the inner peripheral surface of the cylinder so that at least one of the axis of the ejection hole and the axis of the cylinder has a downward direction component in the direction of gravity. The generated gas has a velocity component directed downward, so as to form a swirl flow urged in the opposite direction to the discharge port, so that gravity can contribute to the urging of the swirl flow, so that separation Efficiency can be increased.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an entire compressor according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along the line AA of FIG. 1;
FIG. 3 is a sectional view showing a BB section of FIG. 2;
FIG. 4 is a partial sectional view showing a modification of the sealing means.
FIG. 5 is a partial sectional view showing a modification of the oil separator.
FIG. 6 is a cross-sectional view showing a modified example of the oil separator.
FIG. 7 is a longitudinal sectional view of the entire compressor showing a conventional example.
FIG. 8 is a sectional view showing a section taken along line II-II of FIG. 7;
FIG. 9 is a partial sectional view of a compressor showing another conventional example.
[Explanation of symbols]
C compressor
1 Housing
2 Inlet
3 outlet
4 Compressor
34 Discharge chamber
40 separator
41 cylinder
43 orifice
50 oil sump room
60 access port (opening hole)
61 Plug seal (sealing means)
62 temperature sensor

Claims (6)

In the housing, a compression unit that compresses a mist-containing gas containing a mist-like liquid is provided,
An outlet for discharging the mist-containing gas compressed by the compression unit to the outside is formed in the housing,
In a compressor provided with a separator for separating a liquid from the mist-containing gas between the compression unit and the discharge port,
The separator has a void in the entire internal space, and includes a cylindrical body that generates a swirling flow in the internal space to separate the liquid from the mist-containing gas. An ejection hole for ejecting the mist-containing gas from the part to the internal space is formed,
The compressor according to claim 1, wherein the ejection hole is formed so as to be inclined toward a lower end of the cylinder with respect to an axis of the cylinder. An opening hole is formed in a housing portion located on an extension of the direction in which the ejection hole is formed toward the housing,
The compressor according to claim 1, wherein the opening is provided with sealing means for closing the opening. The compressor according to claim 2, wherein the sealing means is a temperature sensor for detecting a temperature of the mist-containing gas. The compressor according to claim 3, wherein the detection unit of the temperature sensor is disposed near the mist-containing gas flowing into the ejection hole. In the housing, a compression unit that compresses a mist-containing gas containing a mist-like liquid is provided,
An outlet for discharging the mist-containing gas compressed by the compression unit to the outside is formed in the housing,
A separator that separates liquid from the mist-containing gas is provided between the compression unit and the discharge port,
The separator has a cylindrical body, and a discharge port for discharging the mist-containing gas from the compression section to the internal space is formed on a side wall of the cylindrical body,
In a compressor manufacturing method for manufacturing a compressor in which the ejection hole is formed in a direction inclined with respect to the axis of the cylindrical body,
Form an opening hole in the housing,
Positioning the cylindrical body so that the axis of the cylindrical body of the separator is inclined with respect to the insertion direction of the tool inserted into the opening hole,
A method for manufacturing a compressor, comprising: inserting a tool into the opening; and forming an ejection hole in a side wall of the cylindrical body. A compression unit that compresses a gas containing a mist-like liquid,
A separator that separates a liquid from the gas compressed by the compression unit by centrifugation,
The separator includes a cylindrical body having an inner peripheral surface to which a liquid adheres and a discharge port for discharging the compressed gas to the outside, and a discharge hole for discharging the gas compressed by the compression unit to the inside. Thing,
Forming the ejection hole on the inner peripheral surface of the cylinder so that at least one of the axis of the ejection hole and the axis of the cylinder has a downward component in the direction of gravity,
An axis of the ejection hole is provided to be inclined with respect to an axis of the cylinder in a direction away from the outlet, and the inner peripheral surface facing the ejection hole is ejected from the ejection hole in the cylinder. A compressor that urges the swirling direction of the gas to a side opposite to the discharge port.

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