JP4022166B2 - Compressor and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a compressor for compressing refrigerant gas 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]
In general, in a vehicle air conditioner, mist-like lubricating oil is contained in 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 the heat conduction in the heat exchanger and reduces the efficiency of the cooling cycle. Thus, a structure is adopted in which an oil separator that separates the lubricating oil from the refrigerant gas is provided in the compressor so that the lubricating oil does not flow out of the compressor (see, for example, 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. 8 is a transverse sectional view showing a section II-II in FIG.
[0004]
In this compressor, the housing includes a compression mechanism that compresses the refrigerant gas, a drive unit that drives the compression mechanism with external power, and a discharge unit that discharges 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 includes a fixed scroll 101 and a movable scroll 102, and the fixed scroll 101 and the movable scroll 102 are opposed to each other, and a compression body 103 is formed by engaging a spiral body provided in each.
[0006]
The discharge unit 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 is communicated with the compression chamber 103 of the compression mechanism via a discharge port 132 drilled in the center of the fixed scroll 101.
[0007]
As shown in FIG. 8, the oil separator 150 includes a bottomed outer cylinder 151 and an inner cylinder 152 disposed concentrically in the outer cylinder 151. The oil separator 150 includes an outer cylinder 151 and an inner cylinder 152. A cylindrical hollow portion 153 having an annular cross section is formed therebetween.
A discharge gas ejection hole 154 is formed in the upper side wall of the outer cylinder 151 facing the discharge chamber 138, and the discharge chamber 138 and the hollow portion 153 communicate with each other. The ejection hole 154 is opened in a tangential direction in the 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 portion of the outer cylinder 151 is disposed 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 the side wall facing the oil storage chamber 137. ing.
A gas exhaust port 152d is opened in the upper part of the inner cylinder 152, and an external pipe (not shown) is connected to the gas exhaust port 152d. A lower portion of the inner cylinder 152 is opened in the outer cylinder 151.
[0008]
In the scroll compressor configured as described above, the movable scroll 102 is swiveled with power, and the refrigerant gas sucked from a suction port (not shown) is sucked into the compression chamber 103, and the pressure is sequentially increased in the compression chamber 103. And is discharged from the discharge port 132 to the discharge chamber 131.
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 in a tangential direction with respect to the hollow portion 153, the refrigerant gas introduced into the hollow portion 153 forms a swirling flow as indicated by an arrow in FIG. The mist-like lubricating oil having a high specific gravity by the flow is urged in the centrifugal direction, 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 is stored in the oil storage chamber 137 through the oil drain hole 155. It is dripped and stored.
On the other hand, the discharged gas from which the lubricating oil has been removed is sent to the refrigerant circuit from the gas discharge port 152d via the lower end of the inner cylinder 152 of the oil separator 150.
[0009]
Moreover, the compressor which employ | adopted the format which does not have an inner cylinder is also used as a structure of the other oil separator different from the oil separator mentioned above (for example, refer patent document 2). Such a compressor will be described with reference to FIG. FIG. 9 is a partial cross-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 with each other 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, and a communication hole 248g is formed through the central portion of the partition plate 248f and is opened 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 into the separation chamber 248a from below, and is swung 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 toward the discharge passage 247 through the communication hole 248g.
[0012]
[Patent Document 1]
Japanese Patent Laid-Open No. 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]
By the way, 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 mandatory. For this reason, there is a problem that an increase in the number of parts due to the insertion of the inner cylinder, and consequently an increase in cost.
[0014]
Moreover, if it is going to obtain the required flow volume and pressure in the gas exhaust port 152d, the diameter of the gas exhaust port 152d must be a predetermined dimension. However, when the outer cylinder 151 is provided outside the inner cylinder 152 that conforms to this dimension, the hollow gas 153, which is the gap between the outer diameter of the inner cylinder 152 and the inner diameter of the outer cylinder 151, must be sufficiently large so that the swirling gas Since the speed is lowered and the mist-like oil cannot be sufficiently centrifuged, the diameter of the outer cylinder 151 is inevitably increased, and there is a problem that the oil separator 150 is increased in size.
[0015]
In order to solve such a problem, it is also conceivable to employ a configuration that does not use the inner cylinder as described above. However, such a configuration is restricted by the degree of design freedom that the cylinder height H of the separation cylinder of the oil separator must be set to a cylinder diameter L or less.
[0016]
Furthermore, since the centrifugal oil separator uses centrifugal force caused by the swirling flow, it is effective to swirl the refrigerant gas ejected from the acceleration passage 249 with a small curvature radius. On the other hand, when the cylindrical diameter L of the separation chamber 248a is large, the centrifugal force due to the swirling cannot be increased, and there is a problem that the oil separation effect is lowered. On the contrary, 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 passage resistance. A new problem arises.
[0017]
Further, since the acceleration passage 249 is opened to the separation chamber 248a from below, the acceleration passage 249 is ejected against gravity and the swirling speed of the swirling flow is attenuated, so that the separation efficiency is lowered.
Furthermore, since the separation chamber 248a is formed in the horizontal direction, it is difficult to smoothly discharge the separated lubricating oil using gravity, and in addition to this, the separation chamber 248a was ejected from the acceleration passage 249 opened from below. The separated lubricating oil is scattered by the refrigerant gas and may flow out again as a mist.
[0018]
The present invention has been made in view of the above problems, and provides a compressor including a separator having a sufficient liquid (oil) separation performance despite its simple configuration, and a method for manufacturing the same. For the purpose.
[0019]
[Means for Solving the Problems]
In order to solve the above problems, the following means are employed in the present invention.
That is, the compressor according to claim 1 includes a compression unit that compresses a mist-containing gas containing a mist-like liquid in the housing, and discharges the mist-containing gas compressed by the compression unit to the outside. In the compressor in which a discharge port is formed in the housing, and a separator that separates liquid from the mist-containing gas is provided between the compression part and the discharge port, the separator has a space inside the entire space. And a cylindrical body that separates the liquid from the mist-containing gas by generating a swirling flow in the internal space, and the mist-containing gas from the compression section is placed on the side wall of the cylindrical body. An ejection hole for ejecting into the space is formed, and the ejection hole is formed in a direction inclined to the lower end of the cylinder with respect to the axis of the cylinder. An opening hole is formed in the housing portion located on an extension line in the formation direction of the ejection hole toward the housing, and a sealing means for closing the opening hole is provided in the opening hole. It is characterized by.
[0020]
Since the ejection hole is formed in a direction inclined to the lower end of the cylindrical body with respect to the axis of the cylindrical body, the swirl flow generated in the internal space of the cylindrical body is directed downward of the cylindrical body. Since the swirl flow is directed downward, the inertial force of the liquid contained in the mist-containing gas is also directed downward. The liquid adhering to and separated from the inner wall surface of the cylinder is urged by a swirling flow in addition to gravity and collected below the separator.
In the present invention, the entire internal space is a gap, and other members such as an inner cylinder are not disposed.
[0022]
Since the opening hole is provided in the housing portion positioned on the extension line in the formation direction of the ejection hole toward the housing, a positional relationship is formed in which the formation direction of the ejection hole and the opening hole coincide with each other on the extension line. Such a positional relationship is advantageous when manufacturing the ejection holes. In other words, if a tool is inserted along the extension line from the outside of the housing through the opening, and the ejection hole is formed in the cylinder of the separator, the ejection inevitably inclined downward with respect to the cylinder A hole will be obtained.
After forming the ejection hole, the opening hole is closed with a sealing means to obtain a housing that is a sealed container.
[0023]
Claim 2 The compressor according to claim 1 1 In the compressor described above, the sealing means is a temperature sensor that detects the temperature of the mist-containing gas.
[0024]
A temperature sensor is employed as a sealing means for closing the opening hole used for forming the ejection hole. As a result, the opening hole is diverted as an attachment hole for attaching the temperature sensor, and as a result, the number of holes formed in the housing does not increase.
[0025]
Claim 3 The compressor according to claim 1 2 In the compressor described above, the detection unit of the temperature sensor is arranged in the vicinity of the mist-containing gas flowing into the ejection hole.
[0026]
The mist-containing gas compressed by the compression unit concentrates in the ejection holes in order to flow into the ejection holes of the separator. By arranging the detection part of the temperature sensor in this part, the representative temperature of the compressed gas is detected. In particular, even when the amount of gas is reduced due to some cause, the gas always passes through the ejection holes, so that the sensitivity of the temperature sensor does not decrease.
[0027]
Claim 4 The compressor manufacturing method according to claim 1, wherein the housing includes a compression portion that compresses a mist-containing gas containing a mist-like liquid, and an exhaust port that discharges the mist-containing gas compressed by the compression portion to the outside. Is formed in the housing, and a separator for separating the liquid from the mist-containing gas is provided between the compression portion and the discharge port, and the separator includes a cylinder and a side wall of the cylinder The compressor is formed with an ejection hole for ejecting the mist-containing gas from the compression section into the internal space, and the ejection hole is inclined with respect to the axis of the cylindrical body. In the manufacturing method of the compressor to manufacture, A housing portion located on an extension line in the direction of formation of the ejection hole toward the housing; An opening hole is formed 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. Said Position the cylinder and place it in the opening hole. Said Insert a tool into the side wall of the cylinder Said An ejection hole is formed.
[0028]
Since the hole is formed in the side wall portion of the cylinder while the axis of the cylinder of the separator is 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]
Claim 5 The compressor described in In the housing, A compressor comprising: a compression unit that compresses a gas containing a mist-like liquid; and a separator that separates the liquid from the gas compressed in the compression unit by centrifugation. The separator attaches the liquid. A cylinder having an inner peripheral surface and a discharge port for discharging the compressed gas to the outside, and an ejection hole for ejecting the gas compressed by the compression unit to the inside; An opening hole is formed in the housing portion located on the extension line in the formation direction of the ejection hole toward the housing, and the opening hole is provided with a sealing means for closing the opening hole, Forming the ejection hole in 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 gravitational direction, and the axis of the ejection hole, The inner circumferential surface facing the ejection hole is provided so as to be inclined with respect to the axis of the cylinder in a direction away from the discharge port, and the swirl direction of the gas ejected from the ejection hole in the cylinder is It is characterized by energizing to the opposite side to the discharge port.
[0030]
The injection hole is formed on the inner peripheral surface of the cylinder so that at least one of the axis of the injection hole and the axis of the cylinder has a downward direction component in the gravity direction, and the axis of the injection hole is separated from the discharge port Since the inner peripheral surface facing the ejection hole faces the direction of the swirl of the gas ejected from the ejection hole in the cylinder toward the opposite side of the discharge port, The ejected gas does not contain an upward direction component in the gravitational direction, and does not attenuate the momentum of the ejected gas. As a result, the turning speed is accelerated by the addition of a downward direction component in the direction of gravity when in the initial turning state at the time of ejection, and the separation efficiency can be increased.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a longitudinal sectional view of the entire scroll type electric compressor (compressor) according to the present embodiment. 2 is a cross-sectional view showing an AA cross section of FIG. FIG. 3 is a cross-sectional view showing a BB cross section of FIG.
[0032]
The scroll compressor C shown in FIG. 1 is mainly used for compressing the refrigerant gas of the vehicle air conditioner. The scroll compressor C includes a housing 1, a compression unit 4 accommodated in the housing 1, and an electric motor 5 that drives the compression unit 4. The compression unit 4 and the electric motor 5 are connected by a rotating shaft 6, and the rotating shaft 6 includes a main bearing 7 on one end side (right side in the figure) and an auxiliary bearing 8 on the other end side (left side in the figure). Through these, the housing 1 is rotatably supported.
[0033]
The housing 1 is disposed horizontally and is a sealed container having a substantially cylindrical shape that encloses the entire scroll-type electric compressor C. The housing 1 includes a front housing 1a disposed on the other end side, a center housing 1b disposed on the right side of the front housing 1a, and a rear housing disposed on the right side and on one end side of the center housing 1b. 1c.
[0034]
An electric motor 5 is accommodated in the front housing 1a. In addition, at the upper part on the other end side of the front housing 1 a, the suction port 2 is provided so as to open toward the rotary shaft 6 in the low-pressure chamber 30 that is the space on the left side of the electric motor 5.
The center housing 1b is formed with a substantially cylindrical support frame that supports 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 rear housings 1c. The outer peripheral surface is formed. A main bearing 7 that rotatably holds the rotary shaft 6 is disposed on the inner periphery of the center housing 1b. The center housing 1b is formed with a refrigerant gas passage 31 formed so as to penetrate between both end faces along the axial direction.
The compression part 4 is accommodated in the rear housing 1c.
[0035]
The compression unit 4 is of a scroll type and compresses the refrigerant gas drawn from the suction port 2. The refrigerant gas is a lubricating mist-containing gas in which lubricating oil for lubricating each part in the housing 1 of the compressor is contained in a mist form.
[0036]
The compression unit 4 includes a fixed scroll 4b and a turning scroll 4a.
The orbiting scroll 4 a has a spiral wrap 11 erected on one side of the disk 10. A boss 12 is provided on the opposite surface of the disk 10, and a crank pin 9 is connected to the boss 12.
The fixed scroll 4 b has a spiral wrap 21 erected on one side 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 are engaged with each other, and a compression chamber 33 is formed in the space between the wraps. A suction chamber 32 connected to the refrigerant gas passage 31 is formed as a space between the rear housing 1 c and the compression portion 4.
[0038]
On the discharge side (right side in the figure) of the compression unit 4, a discharge chamber 34 and an oil reservoir chamber 50 limited by the compression unit 4 itself are provided.
The oil reservoir chamber 50 is provided so as to be separated from the upper discharge chamber 34 by a partition wall formed integrally with the rear housing 1c.
An oil separator 40 is disposed in the discharge chamber 34. A discharge port 3 that opens to the outside of the compressor C is provided at the upper end of the oil separator 40.
The oil reservoir 50 is disposed below the discharge chamber 34 and the oil separator 40. The lower end of the oil separator 40 is opened to the oil sump chamber 50.
[0039]
The configuration of the oil separator 40 will be described in detail mainly using FIG.
As shown in FIG. 2, the oil separator 40 is constituted by a separation cylinder (tubular body) 41 that is integrally provided inside the rear housing 1 c. The separation cylinder 41 has a cylindrical shape, and its axis L1 is inclined with respect to the gravitational direction in a cross section perpendicular to the axis of the compressor C (that is, the cross section of FIG. Arranged to have components. Inside the separation cylinder 41, a hollow portion 42 is formed which is entirely void. That is, no other member such as an inner cylinder is inserted into the separation cylinder 41.
[0040]
As shown in FIG. 2, a discharge port 3 that opens to the outside of the compressor C and is connected to an external pipe is formed at the upper end of the separation cylinder 41. An oil sump chamber is formed at the lower end of the separation cylinder 41. An oil discharge port 44 that opens to 50 is formed.
A shielding 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 reservoir chamber 50.
[0041]
An ejection hole 43 is formed in a side wall of the separation cylinder 41 so as to communicate with the hollow portion 42. As is clear from FIG. 2, the ejection hole 43 is inclined such that its axis L <b> 2 is inclined with respect to the axis L <b> 1 of the separation cylinder 41 toward the lower end of the separation cylinder 41, i.e., 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 so as to be along the inner peripheral surface of the separation cylinder 41 in a cross section orthogonal to the axis L <b> 1. In addition, in order to give the directionality of the fluid flowing through the ejection holes 43, the ejection holes 43 are formed in the thick part of the separation cylinder 41 to secure the distance of the ejection holes 43. A plurality of ejection holes 43 may be provided in order 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 the extension line L2 in the direction in which the ejection holes 43 are formed. The access port 60 is sealed with a plug seal 61. As will be described later, the nozzle 43 of the rotary tool is inserted from the access port 60 to process the ejection hole 43.
[0044]
The operation of this embodiment based on the above configuration will be described below.
When the electric motor 5 is driven, the orbiting scroll 4a is driven through the rotating shaft 6 and the crankpin 9, and the orbiting scroll 4a revolves on the revolution track while being prevented from rotating by the rotation preventing mechanism.
Then, refrigerant gas containing mist of lubricating oil is sucked from the suction port 2, and this refrigerant gas passes through the refrigerant gas passage 51 provided in the center housing 1b, while lubricating each sliding portion such as the main bearing 7, etc. The air is sucked into the compression chamber 33 through the suction chamber 52.
[0045]
When the orbiting scroll 4a is turned, the compression chamber 33 is gradually narrowed along with this, the internal gas is compressed and reaches the center, and is discharged from the center through the discharge port 22 into the discharge chamber 34. The discharge valve 23 opens and closes due to the differential pressure 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 through the discharge chamber 34.
[0046]
The refrigerant gas is jetted into the hollow portion 42 in the separation cylinder 41 from the jet hole 43 provided in the side wall of the oil separator 40, that is, the separation cylinder 41. At this time, since the ejection hole 43 is opened in a tangential direction with respect to the hollow portion 42 and inclined in the lower end direction with respect to the axis L1, the refrigerant gas ejected into the hollow portion 53 has a lower end as indicated by an arrow in FIG. A swirling flow having a velocity component toward the head is formed.
The swirling flow of the refrigerant gas causes the mist-like lubricating oil having a specific gravity higher than that of the refrigerant gas to be urged in the centrifugal direction, adheres to the inner wall surface of the separation cylinder 41, flows downward by gravity, It is dropped into the reservoir chamber 50 and stored.
[0047]
Thereafter, the refrigerant gas from which the lubricating oil has been removed loses the turning speed component and the downward speed component due to the viscosity resistance of the refrigerant gas itself, and passes upward through the center of the hollow portion 42 as indicated by the arrows in FIG. , Flows out 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 path (not shown).
[0048]
Due to the operation as described above, the present embodiment has the following effects. That is, the ejection hole 43 provided in the separation cylinder 41 is tangential to the hollow portion 42 and is inclined in the lower end direction with respect to the axis L1 of the separation cylinder 41. A swirling flow biased in the direction opposite to the discharge port 3 having a velocity component toward the lower end can be formed. Therefore, even if the oil separator 40 is constituted by a single separation cylinder, it is possible to keep the swirl flow in the hollow portion 42 sufficient to centrifuge the lubricating oil. Thus, since the inner cylinder is unnecessary, the number of parts and the cost can be reduced. And since it is not necessary to insert an inner cylinder, the diameter of the isolation | separation cylinder 41 can be made small and it can contribute to size reduction of the compressor C whole.
[0049]
In addition, the ejection hole 43 of this embodiment is provided so as to be inclined in the lower end direction relative to the separation cylinder 41 in order to form a swirling flow having a velocity component toward the lower end of the hollow portion 42 as described above. Is. Therefore, as long as the same operation effect is produced, it is needless to say that not only the form in which the ejection hole 43 has a downward direction component with respect to the direction of gravity but also the form having a horizontal or upward direction component is included.
[0050]
Next, the manufacturing method of the compressor in this embodiment is demonstrated.
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 inclined with respect to the insertion direction of the rotary tool inserted into the access port 60. Then, the rotary 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 portion of the separation cylinder 41.
As described above, since the rotary tool is inserted and the ejection hole 43 is formed in the state where the separation cylinder 41 is inclined with respect to the formation direction of the access port 60, it is inclined with respect to the axis L1 of the separation cylinder 41. The ejection hole 43 can be easily formed.
[0051]
Next, a modification of this embodiment is shown.
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 detection unit 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. Moreover, the hole provided for the processing of the ejection hole 43 can be sealed without requiring an additional part such as a plug seal.
As a sealing means for the access port 60, it is also effective to use a pressure release valve.
[0052]
Furthermore, another modification of the present embodiment will be described.
As shown in FIG. 5, an inner cylinder 45 with a pipe integrated with an external pipe is provided inside the separation cylinder 41. That is, the pipe-equipped inner cylinder 45 includes a lower inner cylinder part 45 a inserted into the separation cylinder 41, and a fixing part 45 b connected to the inner cylinder part 45 a and fitted into the discharge port 3 of the separation cylinder 41. A piping portion 45c extending from the fixed portion 45b to the outside is integrally formed. By adopting such an inner cylinder 45 with a pipe, conventionally, after inserting and fixing the inner cylinder in the separation cylinder, it is possible to avoid the trouble of assembling such as connecting an external pipe as a separate member to the discharge port. be able to.
[0053]
Moreover, 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 in a tangential direction with respect 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 are configured to have a downward direction component in the gravity direction. As a result, the refrigerant gas ejected into the hollow portion 53 forms a swirling flow that has a velocity component downward in the gravitational direction as indicated by an arrow in FIG.
[0054]
【The invention's effect】
According to the first aspect of the present invention, the ejection hole is formed in the direction inclined toward the lower end of the cylindrical body, and the swirling flow toward the lower end is generated in the internal space of the cylindrical body. Can be done effectively. That is, the liquid can be sufficiently separated without using a member that promotes liquid separation, such as the inner cylinder. Therefore, it is possible to provide a compressor having a sufficient liquid separation function with a simple configuration.
[0055]
Squirt Since it has a positional relationship in which the formation direction of the outlet hole and the opening hole coincide with each other on the extension line, a jet hole that is inclined downward is formed simply by inserting a tool from the opening hole to form the outlet hole. Can do. Since such a simple manufacturing method can be realized, a compressor with low manufacturing cost can be provided.
[0056]
Claim 2 Since the temperature sensor is employed as the sealing means, the opening hole provided for forming the ejection hole can be used effectively.
[0057]
Claim 3 According to the invention described in (2), since the detection part of the temperature sensor is arranged in the vicinity of the mist-containing gas flowing into the ejection hole, an accurate gas temperature can be measured.
[0058]
Claim 4 According to the invention described in the above, since the ejection hole is formed with the cylindrical body inclined with respect to the insertion direction of the tool to be inserted into the opening hole, it is possible to easily form the inclined ejection hole. it can.
[0059]
Claim 5 According to the invention described in (4), the jet gas is formed by forming the jet hole on the inner peripheral surface of the cylinder so that at least one of the axis of the jet hole and the axis of the cylinder has a downward direction component in the gravitational direction. Since a swirl flow that is biased in the opposite direction to the discharge port has a velocity component that is directed downward, gravity can contribute to the swirl flow bias, thus increasing the separation efficiency. can do.
[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 cross-sectional view taken along the line AA in FIG.
3 is a cross-sectional view showing a BB cross section of FIG. 2;
FIG. 4 is a partial cross-sectional view showing a modified example of the sealing means.
FIG. 5 is a partial cross-sectional view showing a modified example of the oil separator.
FIG. 6 is a cross-sectional view showing a modification of the oil separator.
FIG. 7 is a longitudinal sectional view of an entire compressor showing a conventional example.
FIG. 8 is a cross-sectional view showing a II-II cross section of FIG.
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 compression section
34 Discharge chamber
40 separator
41 cylinder
43 Outlet
50 Oil sump chamber
60 Access port (open hole)
61 Plug seal (sealing means)
62 Temperature sensor

Claims (5)

The housing includes a compression unit that compresses a mist-containing gas containing a mist-like liquid,
A discharge port for discharging the mist-containing gas compressed by the compression part to the outside is formed in the housing,
In the compressor provided with a separator for separating the liquid from the mist-containing gas between the compression unit and the discharge port,
The separator is provided with a cylindrical body in which the entire internal space is a space, and a swirling flow is generated 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 into the internal space is formed,
The ejection hole is formed in a direction inclined to the lower end of the cylinder with respect to the axis of the cylinder ,
An opening hole is formed in the housing portion located on the extension line in the formation direction of the ejection hole toward the housing,
A compressor characterized in that the opening hole is provided with a sealing means for closing the opening hole . It said sealing means, compressor according to claim 1, characterized in that it is a temperature sensor for detecting the temperature of the mist-containing gas. The compressor according to claim 2 , wherein the detection unit of the temperature sensor is disposed in the vicinity of the mist-containing gas flowing into the ejection hole. The housing includes a compression unit that compresses a mist-containing gas containing a mist-like liquid,
A discharge port for discharging the mist-containing gas compressed by the compression part to the outside is formed in the housing,
A separator for separating a liquid from the mist-containing gas is provided between the compression unit and the discharge port,
The separator includes a cylindrical body, and an ejection hole for ejecting the mist-containing gas from the compression section into the internal space is formed in a side wall portion of the cylindrical body,
In the compressor manufacturing method for manufacturing the compressor formed in a direction in which the ejection hole is inclined with respect to the axis of the cylindrical body,
Forming an opening hole in a housing portion located on an extension line in the formation direction of the ejection hole toward the housing ;
It said cylindrical body is positioned such that the axis line of the cylindrical body of the separator with respect to the insertion direction of the tool is positioned obliquely inserted into the opening hole,
Method for producing a compressor, characterized in that the tool is inserted into the opening hole, forming the ejection holes in the side wall portion of the cylindrical body. In the housing, a compression unit that compresses a gas containing a mist-like liquid,
In a compressor comprising a separator that separates a liquid from a gas compressed in the compression unit by centrifugation,
The separator includes a cylindrical body having an inner peripheral surface to which a liquid is attached and a discharge port for discharging compressed gas to the outside, and an ejection hole for ejecting the gas compressed by the compression unit to the inside. And
An opening hole is formed in the housing portion located on the extension line in the formation direction of the ejection hole toward the housing,
The opening hole is provided with a sealing means for closing the opening hole,
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 gravitational direction;
An axis of the ejection hole is provided so as to be inclined with respect to the axis of the cylinder 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 A compressor characterized in that the swirling direction of the gas is urged to the opposite side to the discharge port.

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