EP2741029A2 - Oil separator - Google Patents
Oil separator Download PDFInfo
- Publication number
- EP2741029A2 EP2741029A2 EP13196122.9A EP13196122A EP2741029A2 EP 2741029 A2 EP2741029 A2 EP 2741029A2 EP 13196122 A EP13196122 A EP 13196122A EP 2741029 A2 EP2741029 A2 EP 2741029A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- internal space
- gas
- shell
- cylindrical internal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003921 oil Substances 0.000 description 65
- 239000003507 refrigerant Substances 0.000 description 9
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 239000010726 refrigerant oil Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/02—Centrifugal separation of gas, liquid or oil
Definitions
- the present invention relates to an oil separator that is suitable for use in a refrigerator or an air conditioner.
- centrifugal oil separator in which refrigerant oil contained in refrigerant discharged from a compressor is separated by centrifugation, thus separating gas-phase refrigerant and refrigerant oil.
- PTL 1 discloses a countermeasure for this.
- PTL 1 discloses an oil separator including the following: a shell having a cylindrical part and a tapered part that is integrally formed at a lower portion of the cylindrical part and that is tapered downward; an outlet pipe that is inserted into the shell from an upper portion of the shell so as to be coaxial with the shell; a discharge pipe that is connected to an opening provided at a lower portion of the tapered part; and an inlet pipe that is connected along the tangential direction of an inner wall surface of the cylindrical part and through which a gas-liquid two-phase fluid flows into the shell, in which the distance between the opening and a shell side end portion of the outlet pipe is equal to or more than five times the inner diameter of the inlet pipe.
- the inlet pipe has a straight pipe portion connected to the cylindrical part of the shell, and the length of the straight pipe portion is equal to or more than eight times the inner diameter of the inlet pipe; as a result, when the gas flow rate is small, the efficiency of oil separation can be improved at a low cost.
- PTL 1 discloses the outlet pipe, which is inserted into the shell from the upper portion of the shell so as to be coaxial with the shell, and the discharge pipe, which is opposed to the outlet pipe.
- a mixture fluid of refrigerant gas and oil is supplied from a gas inlet pipe 5 and is separated into gas and oil in the shell pipe 2.
- a pressure field 6 tends to be formed in the refrigerant flow flowing in and around a center portion of the shell pipe 2. Because the pressure field 6 is formed into a ring shape (point symmetry) as viewed in a transverse section of the shell pipe 2, a specific vibration mode tends to be excited.
- pressure fluctuation tends to occur between an inner circumferential side and an outer circumferential side of the pressure field 6.
- the specific vibration generated by the pressure fluctuation is transferred to the pipes, thus causing resonance and noise.
- the present invention has been made in view of such circumstances, and an object thereof is to provide an oil separator that prevents the occurrence of resonance by preventing a specific vibration in the shell pipe.
- the oil separator of the present invention employs the following solutions.
- a first aspect of the present invention provides an oil separator comprising the following elements: a housing (shell pipe) that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides gas separated in the cylindrical internal space to the outside, wherein a central axis line of the gas outlet pipe is provided eccentrically with respect to a central axis line of the shell pipe.
- the gas outlet pipe is provided eccentrically with respect to the central axis line of the shell pipe.
- the flow and the pressure field in the shell pipe can be prevented from being point symmetrical.
- excitation of a specific vibration mode can be prevented.
- vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring.
- a second aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein an open end surface of a tip portion of the gas outlet pipe that is located inside the shell pipe is configured so as to form an angle with respect to a plane perpendicular to a central axis line of the shell pipe.
- the open end surface of the tip portion of the gas outlet pipe which is located inside the shell pipe, is configured so as to form an angle with respect to a plane perpendicular to the central axis line of the shell pipe.
- a third aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein the gas outlet pipe is provided such that a central axis line of the gas outlet pipe is inclined with respect to a central axis line of the shell pipe.
- the gas outlet pipe is provided so as to be inclined with respect to the central axis line of the shell pipe.
- a fourth aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and a gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein a tip portion of the gas outlet pipe is curved so that the tip portion of the gas outlet pipe has a predetermined angle with respect to a central axis line of the shell pipe.
- the tip portion of the gas outlet pipe is curved with respect to the central axis line of the shell pipe.
- the position and the shape of the gas outlet pipe are not aligned with the central axis line of the shell pipe.
- the flow and the pressure field in the shell pipe can be prevented from being point symmetrical.
- excitation of a specific vibration mode can be prevented.
- vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring.
- Fig. 1 is a perspective view showing, in outline, a configuration of an oil separator 1 of this embodiment.
- the oil separator 1 is used in a refrigerator or an air conditioner.
- the oil separator 1 is provided with a shell pipe 2, an oil return pipe 3, a gas outlet pipe 4, and a gas inlet pipe 5.
- the shell pipe 2 of the oil separator 1 is formed in a cylindrical shape. Furthermore, a cylindrically-formed internal space is provided inside the shell pipe 2.
- the gas inlet pipe 5 that introduces gas is inserted into the shell pipe 2 along the tangential direction of the cylindrical internal space.
- the gas inlet pipe 5 is provided on a side portion of the shell pipe 2 when viewed in the axial direction of the shell pipe 2.
- the approximately-linearly-formed oil return pipe 3 that guides oil separated in the internal space of the shell pipe 2 to the outside is connected to a lower surface of the shell pipe 2.
- the approximately-linearly-formed gas outlet pipe 4 that is disposed so as to be opposed to the oil return pipe 3 and that guides gas separated in the internal space of the shell pipe 2 to the outside is provided through an upper surface of the shell pipe 2.
- the centrifugal oil separator 1 is provided with the gas inlet pipe 5, through which a mixture fluid of refrigerant gas and oil is supplied from a compressor (not shown) located near the shell pipe 2, and the gas outlet pipe 4, through which only the separated gas flows out. Furthermore, the oil return pipe 3, through which oil separated from the gas flows out, is connected to a bottom portion of the shell pipe 2.
- the central axis line L2 of the gas outlet pipe 4 provided in the shell pipe 2 is provided so as to be eccentric with respect to the central axis line L1 of the shell pipe 2.
- the eccentric distance between the central axis line L1 and the central axis line L2 when the diameter of the shell pipe 2 is 50 mm, and the diameter of the gas outlet pipe 4 is 15 mm, for example, the central axis line L2 of the gas outlet pipe 4 is provided 2 mm to 3 mm eccentrically with respect to the central axis line L1 of the shell pipe 2.
- the oil drips down along the inner wall surface of the shell pipe 2, the dripped oil flows into the oil return pipe 3 from a junction point of the oil return pipe 3 and the shell pipe 2, and the oil returns to a suction pipe of the compressor (not shown).
- the central axis line L2 of the gas outlet pipe 4 is provided eccentrically with respect to the central axis line L1 of the shell pipe 2.
- a pressure field 6 (see Fig. 6 ) produced by the flow in the shell pipe 2 is prevented from being point symmetrical.
- the pressure field 6 can be prevented from being produced.
- vibrations in the shell pipe 2 can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring.
- the central axis line L2 of the gas outlet pipe 4, which is inserted into the shell pipe 2 shown in the first embodiment, and the central axis line L1 of the shell pipe 2 are concentrically provided. Identical symbols are assigned to the corresponding structures of the first embodiment, and a description thereof will be omitted.
- the central axis line L1 of the shell pipe 2 and the central axis line L2 of the gas outlet pipe 4 are concentric.
- An open end surface of a tip portion 4a of the gas outlet pipe 4 that is located inside the shell pipe 2 is formed so as to form an angle with respect to a plane perpendicular to the central axis line L1 of the shell pipe 2.
- the angle of inclination of the tip portion 4a is set to 45 degrees, for example, or may be set larger or smaller than 45 degrees.
- the flow of suctioned gas from the open end surface of the tip portion 4a of the gas outlet pipe 4 can be made uneven. Therefore, even though the central axis line L2 of the gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of the shell pipe 2, it is possible to prevent the pressure field 6 (see Fig. 6 ), which can be produced by the flow in the shell pipe 2, from being point symmetrical. Thus, vibrations in the shell pipe 2 can be prevented, and then the occurrence of resonance in the shell pipe can be prevented.
- central axis line L2 of the gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of the shell pipe 2, manufacturing process can be reduced compared with a case in which they are eccentrically provided.
- Fig. 4 is a sectional side view showing a modification of the oil separator 1 of the second embodiment of the present invention.
- the gas outlet pipe 4 is provided in the shell pipe 2 so as to extend across the central axis line L1 of the shell pipe 2 and so as to be inclined with respect to the central axis line L1.
- the gas outlet pipe 4 is inclined with respect to the central axis line L1 of the shell pipe 2, even though the gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of the shell pipe 2, it is possible to prevent the flow in the shell pipe and the pressure field from being point symmetrical. Thus, vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented.
- Fig. 5 is a sectional side view showing a modification of the oil separator 1 of the second embodiment of the present invention.
- a tip portion 4b of the gas outlet pipe 4 in the shell pipe 2 is curved so as to have a predetermined angle with respect to the central axis line L1 of the shell pipe 2.
- the predetermined angle is set to an angle at which the central axis line L1 of the shell pipe 2 is located outside an opening of the tip portion 4b, for example.
- the tip portion 4b of the gas outlet pipe 4 is curved with respect to the central axis line L1 of the shell pipe 2. Furthermore, the gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of the shell pipe 2.
- the flow in the shell pipe 2 and the pressure field can be prevented from being point symmetrical. Specifically, because vibrations in the shell pipe 2 can be prevented, the occurrence of resonance in the shell pipe can be prevented.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cyclones (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
Description
- The present invention relates to an oil separator that is suitable for use in a refrigerator or an air conditioner.
- There is a known centrifugal oil separator in which refrigerant oil contained in refrigerant discharged from a compressor is separated by centrifugation, thus separating gas-phase refrigerant and refrigerant oil.
- In such a conventional oil separator, an appropriate positional relation between an outlet pipe and an inlet pipe is not defined. Thus, in a system in which a refrigerant flow rate changes depending on fluctuations between high pressure and low pressure in a refrigeration cycle caused by load fluctuation etc., or in a system in which the capacity of a compressor is controlled according to the load, even if an appropriate operation can be performed when the refrigerant flow rate is large, when the refrigerant flow rate is reduced, the whirling speed of refrigerant (gas) in the oil separator is reduced, which may reduce the efficiency of oil separation provided by a cyclone effect.
-
PTL 1 discloses a countermeasure for this. -
PTL 1 discloses an oil separator including the following: a shell having a cylindrical part and a tapered part that is integrally formed at a lower portion of the cylindrical part and that is tapered downward; an outlet pipe that is inserted into the shell from an upper portion of the shell so as to be coaxial with the shell; a discharge pipe that is connected to an opening provided at a lower portion of the tapered part; and an inlet pipe that is connected along the tangential direction of an inner wall surface of the cylindrical part and through which a gas-liquid two-phase fluid flows into the shell, in which the distance between the opening and a shell side end portion of the outlet pipe is equal to or more than five times the inner diameter of the inlet pipe. - In the oil separator having the above-described structure, the inlet pipe has a straight pipe portion connected to the cylindrical part of the shell, and the length of the straight pipe portion is equal to or more than eight times the inner diameter of the inlet pipe; as a result, when the gas flow rate is small, the efficiency of oil separation can be improved at a low cost.
- {PTL 1} Publication of Japanese Patent No.
4356214 -
PTL 1 discloses the outlet pipe, which is inserted into the shell from the upper portion of the shell so as to be coaxial with the shell, and the discharge pipe, which is opposed to the outlet pipe. With the structure disclosed inPTL 1, because the outlet pipe and the discharge pipe are opposed to each other and coaxial with the shell, a pressure field produced by the flow in the shell tends to be point symmetrical as viewed in a transverse section of the shell, and a specific vibration tends to be excited. - Specifically, as shown in
Fig. 6 , a mixture fluid of refrigerant gas and oil is supplied from agas inlet pipe 5 and is separated into gas and oil in theshell pipe 2. - At this time, as shown in
Fig. 7 , apressure field 6 tends to be formed in the refrigerant flow flowing in and around a center portion of theshell pipe 2. Because thepressure field 6 is formed into a ring shape (point symmetry) as viewed in a transverse section of theshell pipe 2, a specific vibration mode tends to be excited. - Furthermore, pressure fluctuation tends to occur between an inner circumferential side and an outer circumferential side of the
pressure field 6. Thus, if the pressure fluctuation occurs continuously at the same place in theshell pipe 2, the specific vibration generated by the pressure fluctuation is transferred to the pipes, thus causing resonance and noise. - The present invention has been made in view of such circumstances, and an object thereof is to provide an oil separator that prevents the occurrence of resonance by preventing a specific vibration in the shell pipe.
- In order to solve the above-described problems, the oil separator of the present invention employs the following solutions.
- A first aspect of the present invention provides an oil separator comprising the following elements: a housing (shell pipe) that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides gas separated in the cylindrical internal space to the outside, wherein a central axis line of the gas outlet pipe is provided eccentrically with respect to a central axis line of the shell pipe.
- With the first aspect of the present invention, the gas outlet pipe is provided eccentrically with respect to the central axis line of the shell pipe. Thus, the flow and the pressure field in the shell pipe can be prevented from being point symmetrical. Thus, excitation of a specific vibration mode can be prevented. As a result, vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring.
- Furthermore, a second aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein an open end surface of a tip portion of the gas outlet pipe that is located inside the shell pipe is configured so as to form an angle with respect to a plane perpendicular to a central axis line of the shell pipe.
- With the second aspect of the present invention, the open end surface of the tip portion of the gas outlet pipe, which is located inside the shell pipe, is configured so as to form an angle with respect to a plane perpendicular to the central axis line of the shell pipe. Thus, the flow of suctioned gas from the open end surface of the tip portion can be made uneven. Therefore, even though the gas outlet pipe is provided concentrically with respect to the central axis line of the shell pipe, the flow and the pressure field in the shell pipe can be prevented from being point symmetrical. Thus, vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented.
- Furthermore, a third aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and an approximately-linearly-formed gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein the gas outlet pipe is provided such that a central axis line of the gas outlet pipe is inclined with respect to a central axis line of the shell pipe.
- With the third aspect of the present invention, the gas outlet pipe is provided so as to be inclined with respect to the central axis line of the shell pipe. Thus, even though the gas outlet pipe is provided concentrically with respect to the central axis line of the shell pipe, the flow and the pressure field in the shell pipe can be prevented from being point symmetrical. Thus, vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented.
- Furthermore, a fourth aspect of the present invention provides an oil separator comprising the following elements: a shell pipe that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space; a gas inlet pipe that introduces gas to the shell pipe along a tangential direction of the cylindrical internal space; an approximately-linearly-formed oil return pipe that guides the oil separated in the cylindrical internal space to the outside; and a gas outlet pipe that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside, wherein a tip portion of the gas outlet pipe is curved so that the tip portion of the gas outlet pipe has a predetermined angle with respect to a central axis line of the shell pipe.
- With the fourth aspect of the present invention, the tip portion of the gas outlet pipe is curved with respect to the central axis line of the shell pipe. Thus, even though the gas outlet pipe is provided concentrically with respect to the central axis line of the shell pipe, the flow and the pressure field in the shell pipe can be prevented from being point symmetrical. Thus, vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented.
- According to the oil separator of the present invention, the position and the shape of the gas outlet pipe are not aligned with the central axis line of the shell pipe. Thus, the flow and the pressure field in the shell pipe can be prevented from being point symmetrical. Thus, excitation of a specific vibration mode can be prevented. Furthermore, vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring.
-
- {
Fig. 1} Fig. 1 is a perspective view showing, in outline, a configuration of an oil separator according to a first embodiment of the present invention. - {
Fig. 2} Fig. 2 is a sectional side view showing the oil separator according to the first embodiment of the present invention. - {
Fig. 3} Fig. 3 is a sectional side view showing an oil separator according to a second embodiment of the present invention. - {
Fig. 4} Fig. 4 is a sectional side view showing a modification of the oil separator according to the second embodiment of the present invention. - {
Fig. 5} Fig. 5 is a sectional side view showing a modification of the oil separator according to the second embodiment of the present invention. - {
Fig. 6} Fig. 6 is a horizontal sectional view showing a reference-example oil separator. - {
Fig. 7} Fig. 7 is a horizontal sectional view showing a reference-example pressure field produced in a shell pipe. - Description of Embodiments
- An oil separator according to a first embodiment of the present invention will be described below with reference to
Figs. 1 and 2 . -
Fig. 1 is a perspective view showing, in outline, a configuration of anoil separator 1 of this embodiment. Theoil separator 1 is used in a refrigerator or an air conditioner. Theoil separator 1 is provided with ashell pipe 2, anoil return pipe 3, agas outlet pipe 4, and agas inlet pipe 5. - The
shell pipe 2 of theoil separator 1 is formed in a cylindrical shape. Furthermore, a cylindrically-formed internal space is provided inside theshell pipe 2. Thegas inlet pipe 5 that introduces gas is inserted into theshell pipe 2 along the tangential direction of the cylindrical internal space. Thegas inlet pipe 5 is provided on a side portion of theshell pipe 2 when viewed in the axial direction of theshell pipe 2. - Furthermore, the approximately-linearly-formed
oil return pipe 3 that guides oil separated in the internal space of theshell pipe 2 to the outside is connected to a lower surface of theshell pipe 2. Furthermore, the approximately-linearly-formedgas outlet pipe 4 that is disposed so as to be opposed to theoil return pipe 3 and that guides gas separated in the internal space of theshell pipe 2 to the outside is provided through an upper surface of theshell pipe 2. - As shown in
Fig. 1 , thecentrifugal oil separator 1 is provided with thegas inlet pipe 5, through which a mixture fluid of refrigerant gas and oil is supplied from a compressor (not shown) located near theshell pipe 2, and thegas outlet pipe 4, through which only the separated gas flows out. Furthermore, theoil return pipe 3, through which oil separated from the gas flows out, is connected to a bottom portion of theshell pipe 2. - As shown in
Fig. 2 , the central axis line L2 of thegas outlet pipe 4 provided in theshell pipe 2 is provided so as to be eccentric with respect to the central axis line L1 of theshell pipe 2. Regarding the eccentric distance between the central axis line L1 and the central axis line L2, when the diameter of theshell pipe 2 is 50 mm, and the diameter of thegas outlet pipe 4 is 15 mm, for example, the central axis line L2 of thegas outlet pipe 4 is provided 2 mm to 3 mm eccentrically with respect to the central axis line L1 of theshell pipe 2. - Next, the operation of the
oil separator 1 having the above-described structure will be described below. - While the compressor (not shown) is operated, a mixture fluid of gas and oil flowing out from the compressor through the
gas inlet pipe 5 collides with an inner wall surface of thecylindrical shell pipe 2, and the mixture of gas and oil is rotated at high speed along the inner wall surface of thecylindrical shell pipe 2. The oil is centrifugally pushed against the inner wall surface of theshell pipe 2 and is separated, and the gas flows out through thegas outlet pipe 4. - On the other hand, the oil drips down along the inner wall surface of the
shell pipe 2, the dripped oil flows into theoil return pipe 3 from a junction point of theoil return pipe 3 and theshell pipe 2, and the oil returns to a suction pipe of the compressor (not shown). - According to this embodiment, the following advantageous effect can be achieved.
- As shown in
Fig. 2 , the central axis line L2 of thegas outlet pipe 4 is provided eccentrically with respect to the central axis line L1 of theshell pipe 2. Thus, a pressure field 6 (seeFig. 6 ) produced by the flow in theshell pipe 2 is prevented from being point symmetrical. Furthermore, by providing the central axis lines L1 and L2 eccentrically, thepressure field 6 can be prevented from being produced. - Thus, vibrations in the
shell pipe 2 can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. Therefore, noise can be prevented from occurring. - Next, a second embodiment of the present invention will be described with reference to
Figs. 3 to 5 . - In this embodiment, the central axis line L2 of the
gas outlet pipe 4, which is inserted into theshell pipe 2 shown in the first embodiment, and the central axis line L1 of theshell pipe 2 are concentrically provided. Identical symbols are assigned to the corresponding structures of the first embodiment, and a description thereof will be omitted. - As shown in
Fig. 3 , the central axis line L1 of theshell pipe 2 and the central axis line L2 of thegas outlet pipe 4 are concentric. - An open end surface of a
tip portion 4a of thegas outlet pipe 4 that is located inside theshell pipe 2 is formed so as to form an angle with respect to a plane perpendicular to the central axis line L1 of theshell pipe 2. The angle of inclination of thetip portion 4a is set to 45 degrees, for example, or may be set larger or smaller than 45 degrees. By providing thetip portion 4a of thegas outlet pipe 4 with an angle of inclination, suctioning gas from thetip portion 4a differs between both ends of thetip portion 4a. - According to this embodiment, the flow of suctioned gas from the open end surface of the
tip portion 4a of thegas outlet pipe 4 can be made uneven. Therefore, even though the central axis line L2 of thegas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of theshell pipe 2, it is possible to prevent the pressure field 6 (seeFig. 6 ), which can be produced by the flow in theshell pipe 2, from being point symmetrical. Thus, vibrations in theshell pipe 2 can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. - Furthermore, because the central axis line L2 of the
gas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of theshell pipe 2, manufacturing process can be reduced compared with a case in which they are eccentrically provided. - Note that the following modification can be adopted in the second embodiment.
-
Fig. 4 is a sectional side view showing a modification of theoil separator 1 of the second embodiment of the present invention. As shown inFig. 4 , thegas outlet pipe 4 is provided in theshell pipe 2 so as to extend across the central axis line L1 of theshell pipe 2 and so as to be inclined with respect to the central axis line L1. - Because the
gas outlet pipe 4 is inclined with respect to the central axis line L1 of theshell pipe 2, even though thegas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of theshell pipe 2, it is possible to prevent the flow in the shell pipe and the pressure field from being point symmetrical. Thus, vibrations in the shell pipe can be prevented, and then the occurrence of resonance in the shell pipe can be prevented. - Furthermore, the following modification can be adopted in the second embodiment.
-
Fig. 5 is a sectional side view showing a modification of theoil separator 1 of the second embodiment of the present invention. As shown inFig. 5 , atip portion 4b of thegas outlet pipe 4 in theshell pipe 2 is curved so as to have a predetermined angle with respect to the central axis line L1 of theshell pipe 2. The predetermined angle is set to an angle at which the central axis line L1 of theshell pipe 2 is located outside an opening of thetip portion 4b, for example. - The
tip portion 4b of thegas outlet pipe 4 is curved with respect to the central axis line L1 of theshell pipe 2. Furthermore, thegas outlet pipe 4 is provided concentrically with respect to the central axis line L1 of theshell pipe 2. Thus, the flow in theshell pipe 2 and the pressure field (seeFig. 6 ) can be prevented from being point symmetrical. Specifically, because vibrations in theshell pipe 2 can be prevented, the occurrence of resonance in the shell pipe can be prevented. -
- 1 oil separator
- 2 shell pipe
- 3 oil return pipe
- 4 gas outlet pipe
- 4a tip portion
- 4b tip portion
- 5 gas inlet pipe
- 6 pressure field
- L1 central axis line (shell pipe)
- L2 central axis line (gas outlet pipe)
Claims (4)
- An oil separator comprising:a shell pipe (2) that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space;a gas inlet pipe (5) that introduces gas to the shell pipe (2) along a tangential direction of the cylindrical internal space;an approximately-linearly-formed oil return pipe (3) that guides the oil separated in the cylindrical internal space to the outside; andan approximately-linearly-formed gas outlet pipe (4) that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside,wherein a central axis line (L2) of the gas outlet pipe (4) is provided eccentrically with respect to a central axis line (L1) of the shell pipe (2).
- An oil separator comprising:a shell pipe (2) that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space;a gas inlet pipe (5) that introduces gas to the shell pipe (2) along a tangential direction of the cylindrical internal space;an approximately-linearly-formed oil return pipe (3) that guides the oil separated in the cylindrical internal space to the outside; andan approximately-linearly-formed gas outlet pipe (4) that is located oppositely to the oil return pipe and that guides the gas separated in the cylindrical internal space to the outside,wherein an open end surface of a tip portion (4a) of the gas outlet pipe that is located inside the shell pipe (2) is configured so as to form an angle with respect to a plane perpendicular to a central axis line (L1) of the shell pipe (2).
- An oil separator comprising:a shell pipe (2) that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space;a gas inlet pipe (5) that introduces gas to the shell pipe (2) along a tangential direction of the cylindrical internal space;an approximately-linearly-formed oil return pipe (3) that guides the oil separated in the cylindrical internal space to the outside; andan approximately-linearly-formed gas outlet pipe (4) that is located oppositely to the oil return pipe (3) and that guides the gas separated in the cylindrical internal space to the outside,wherein the gas outlet pipe (4) is provided such that a central axis line (L2) of the gas outlet pipe (4) is inclined with respect to a central axis line (L1) of the shell pipe (2).
- An oil separator comprising:a shell pipe (2) that has a cylindrical internal space and that separates gas and oil in the cylindrical internal space;a gas inlet pipe (5) that introduces gas to the shell pipe (2) along a tangential direction of the cylindrical internal space;an approximately-linearly-formed oil return pipe (3) that guides the oil separated in the cylindrical internal space to the outside; anda gas outlet pipe (4) that is located oppositely to the oil return pipe (3) and that guides the gas separated in the cylindrical internal space to the outside,wherein a tip portion (4b) of the gas outlet pipe (4) is curved so that the tip portion (4b) of the gas outlet pipe has a predetermined angle with respect to a central axis line (L1) of the shell pipe (2).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012269520A JP6219032B2 (en) | 2012-12-10 | 2012-12-10 | Oil separator |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2741029A2 true EP2741029A2 (en) | 2014-06-11 |
EP2741029A3 EP2741029A3 (en) | 2016-06-22 |
EP2741029B1 EP2741029B1 (en) | 2018-10-24 |
Family
ID=49841489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13196122.9A Active EP2741029B1 (en) | 2012-12-10 | 2013-12-06 | Oil separator |
Country Status (3)
Country | Link |
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EP (1) | EP2741029B1 (en) |
JP (1) | JP6219032B2 (en) |
TR (1) | TR201900560T4 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019049375A (en) * | 2017-09-08 | 2019-03-28 | ダイキン工業株式会社 | Oil separator and refrigerating device comprising the same |
JP6788073B2 (en) * | 2019-06-05 | 2020-11-18 | 三菱重工サーマルシステムズ株式会社 | Cyclone oil separator and refrigeration system |
CN217383382U (en) * | 2021-12-16 | 2022-09-06 | 南昌中昊机械有限公司 | Liquid storage device |
Citations (1)
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JP4356214B2 (en) | 2000-08-21 | 2009-11-04 | 三菱電機株式会社 | Oil separator and outdoor unit |
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JPS5722610U (en) * | 1980-07-15 | 1982-02-05 | ||
JPS57117360A (en) * | 1981-01-12 | 1982-07-21 | Mitsubishi Mining & Cement Co Ltd | Cyclone |
JPS5962358A (en) * | 1982-09-30 | 1984-04-09 | Nippon Cement Co Ltd | Cyclone |
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JPS6377643U (en) * | 1986-11-10 | 1988-05-23 | ||
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JP3373284B2 (en) * | 1994-02-01 | 2003-02-04 | 株式会社前川製作所 | Method and apparatus for separating oil from oil-containing compressed gas |
JPH11173706A (en) * | 1997-12-08 | 1999-07-02 | Mitsubishi Electric Corp | Oil separator |
JP3593594B2 (en) * | 2000-07-21 | 2004-11-24 | 株式会社日立製作所 | Gas-liquid separator |
JP2004077033A (en) * | 2002-08-20 | 2004-03-11 | Mitsubishi Electric Corp | Centrifugal oil separator and its manufacturing method |
KR100613505B1 (en) * | 2004-02-25 | 2006-08-17 | 엘지전자 주식회사 | Cooling cycle apparatus |
JP4699801B2 (en) * | 2005-05-02 | 2011-06-15 | 株式会社神戸製鋼所 | Gas-liquid separator |
US20060280622A1 (en) * | 2005-06-10 | 2006-12-14 | Samsung Electronics Co., Ltd. | Oil separator for air conditioner |
JP4966574B2 (en) * | 2006-03-30 | 2012-07-04 | 三洋電機株式会社 | Oil separator for refrigerant cycle |
KR20070106875A (en) * | 2006-05-01 | 2007-11-06 | 삼성전자주식회사 | Hermetic vessel equipped with inserted type discharge pipe, and oil separator, gas-liquid separator and air conditioning system using the same |
JP2008202894A (en) * | 2007-02-21 | 2008-09-04 | Yanmar Co Ltd | Oil separator |
JP4903119B2 (en) * | 2007-06-25 | 2012-03-28 | 三菱電機株式会社 | Gas-liquid separator and air conditioner equipped with it |
JP2010099607A (en) * | 2008-10-24 | 2010-05-06 | Kojima Press Industry Co Ltd | Cyclone type oil separator |
KR20110119553A (en) * | 2010-04-26 | 2011-11-02 | 니찌레이 고오교오 가부시끼가이샤 | Gas-liquid separator and refrigerating apparatus equipped therewith |
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2012
- 2012-12-10 JP JP2012269520A patent/JP6219032B2/en active Active
-
2013
- 2013-12-06 TR TR2019/00560T patent/TR201900560T4/en unknown
- 2013-12-06 EP EP13196122.9A patent/EP2741029B1/en active Active
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JP4356214B2 (en) | 2000-08-21 | 2009-11-04 | 三菱電機株式会社 | Oil separator and outdoor unit |
Also Published As
Publication number | Publication date |
---|---|
TR201900560T4 (en) | 2019-02-21 |
EP2741029B1 (en) | 2018-10-24 |
JP2014115018A (en) | 2014-06-26 |
JP6219032B2 (en) | 2017-10-25 |
EP2741029A3 (en) | 2016-06-22 |
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