JP2007322001A - Mixed fluid separating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently separate a mixed fluid without becoming large in size. <P>SOLUTION: This mixed fluid separating device comprises a gas-liquid separating portion 541 having an inner tube 5411 for allowing the mixed fluid obtained by mixing plural kinds of fluids different in specific gravities to flow, and an outer tube 5412 surrounding an outer periphery of the inner tube 5411, and constituted by spirally forming the inner tube 5411 and the outer tube 5412 around a vertical prescribed axis while forming a plural through holes 5411b directing to the radial outer direction, on a peripheral wall of the inner tube 5411, and a liquid-oil separating portion 542 having an outer tube 5422 communicated with the downstream of the outer tube 5412, closed at its lower end disposed along the vertical direction, and provided with branch piping 5423 at a side portion of a prescribed height position from the lower end, and an inner tube 5421 communicated with the downstream of the inner tube 5411, inserted along the outer tube 5422, and having a through hole 5421b on a peripheral wall at a position lower than the branch piping 5423, and constituted by spirally forming the inner tube 5421 and the outer tube 5422 at a position upper than the branch piping 5423. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mixed fluid separation device for separating a mixed fluid in which a plurality of fluids having different specific gravities are mixed.

  The mixed fluid separation device used in the refrigeration cycle includes a tank-shaped storage unit that temporarily stores a mixed refrigerant in which a gas phase refrigerant and a liquid phase refrigerant having different specific gravities are mixed. In this mixed fluid separation device, the gas phase refrigerant having a relatively low specific gravity stays in the upper part of the storage part, while the liquid phase refrigerant having a relatively high specific gravity stays in the lower part of the storage part. Further, the liquid phase refrigerant staying in the lower part of the storage part is separated due to the difference in specific gravity between the two, and becomes liquid refrigerant stored in the upper layer and machine oil stored in the lower layer (see, for example, Patent Document 1).

JP 2000-1111210 A

  However, in the mixed fluid separation device described in Patent Document 1, fluids having different specific gravities are separated in a state where the mixed refrigerant is stored, so that a large tank is required to increase the separation efficiency. As a result, a large space for installing a large tank is required, which leads to problems such as a limited installation location.

  This invention is made | formed in view of the said situation, and it aims at providing the mixed fluid separation apparatus which can isolate | separate a mixed fluid efficiently, without causing enlargement.

  In order to achieve the above object, a mixed fluid separation device according to claim 1 of the present invention is a device for separating a mixed fluid in which a plurality of fluids having different specific gravities are mixed with each other. The inner tube and the outer tube are spirally provided with an inner tube to be sent and an outer tube surrounding the outer periphery of the inner tube, and provided with a plurality of through-holes facing radially outward in the peripheral wall of the inner tube. It is formed.

  A mixed fluid separation device according to a second aspect of the present invention is a device for separating a mixed fluid in which a plurality of fluids having different specific gravities are mixed with each other, closing the lower end disposed along the vertical direction and closing the lower end. A branch pipe is provided on the side of the position at a predetermined height from the outer pipe to send the mixed fluid to the inside, and a through hole is inserted in the peripheral wall at a position below the branch pipe inserted along the outer pipe. And an inner pipe for sending other fluid to the inside, and both the inner pipe and the outer pipe are formed in a spiral shape at a position above the branch pipe.

  A mixed fluid separation device according to a third aspect of the present invention is a device for separating a mixed fluid in which a plurality of fluids having different specific gravities are mixed with each other, and a first inner pipe for feeding the mixed fluid therein, and A first outer tube surrounding an outer periphery of the first inner tube, and a plurality of through holes facing radially outward are provided in a peripheral wall of the first inner tube, and the first inner tube is disposed around a predetermined axis line directed vertically. A first separation means in which both the pipe and the first outer pipe are formed in a spiral shape, and a lower end that is communicated downstream of the first outer pipe and is disposed along the vertical direction, and has a predetermined height from the lower end. A second outer pipe provided with a branch pipe on the side of the position, and communicated downstream of the first inner pipe and inserted along the second outer pipe to a peripheral wall at a position below the branch pipe Has a second inner pipe with a through hole, and spirals both the second inner pipe and the second outer pipe at a position above the branch pipe And a second separating means formed on the spiral of the first separation means to a predetermined inclination, characterized in that the helix of the second separation means to form loosely than the predetermined inclination.

  The mixed fluid separation device according to the present invention has an inner tube that feeds the mixed fluid therein and an outer tube that surrounds the outer periphery of the inner tube, and a plurality of walls that are directed radially outward on the peripheral wall of the inner tube. Both the inner tube and the outer tube were formed in a spiral shape while providing a through hole. For this reason, a separation fluid force that moves a fluid with a large specific gravity from the through hole to the outer tube is applied, and a fluid with a small specific gravity is left in the inner tube, so that it is possible to efficiently separate the mixed fluid without storing it. Become. As a result, the mixed fluid can be efficiently separated without causing an increase in size.

  In particular, a plurality of through-holes facing in the radially outward direction are provided in the peripheral wall of the inner tube. For this reason, when the mixed fluid sent to the inner pipe has a high flow rate, the fluid is moved from the through-hole in the radially outward direction of the spiral to the outer pipe mainly using the separation flow force formed by the centrifugal force by the spiral. On the other hand, when the mixed fluid sent to the inner pipe has a low flow rate, the fluid is moved from the vertical through hole to the outer pipe mainly using the separated flow force consisting of gravity. As a result, the mixed fluid can be efficiently separated without being affected by the flow rate.

  In addition, according to the mixed fluid separation device according to the present invention, the lower end disposed along the vertical direction is closed, and a branch pipe is provided on a side portion at a predetermined height from the lower end to send the mixed fluid to the inside. And an inner pipe that is inserted along the outer pipe and is provided with a through hole in the peripheral wall at a position lower than the branch pipe to allow other fluid to flow inside. In position, both the inner and outer tubes were helically formed. For this reason, a fluid having a relatively low specific gravity is sent from the branch pipe while a fluid having a relatively high specific gravity is stored in the closed portion below the branch pipe. Further, the stored fluid is sent to the inner pipe through the through hole. In particular, the mixed fluid is sent while being stored in the spiral portion. As a result, the mixed fluid can be efficiently separated without causing an increase in size.

  Moreover, according to the mixed fluid separation device according to the present invention, the first inner tube that feeds the mixed fluid to the inside, and the first outer tube that surrounds the outer periphery of the first inner tube, A first separation means having a first inner pipe and a first outer pipe formed in a spiral shape around a predetermined axial line facing up and down while providing a plurality of through-holes facing radially outward in the peripheral wall; A second outer pipe that is closed downstream and is arranged along the vertical direction, and a branch pipe is provided on a side portion at a predetermined height from the lower end, and communicates downstream of the first inner pipe. The second inner pipe is inserted along the second outer pipe and has a through hole in the peripheral wall at a position lower than the branch pipe, and the second inner pipe and the second pipe are positioned above the branch pipe. A second separation means formed in a spiral shape with both outer tubes, the spiral of the first separation means having a predetermined inclination, and the spiral of the second separation means having a predetermined inclination Was loosely than the. For this reason, in the first separation means, a separation flow force in which a fluid having a large specific gravity moves from the through hole to the outer tube acts, and a fluid having a small specific gravity remains in the inner tube. Further, in the second separation means, a fluid having a relatively high specific gravity is stored in the closed portion below the branch pipe, while a fluid having a relatively low specific gravity is sent from the branch pipe, and the stored fluid is further passed through the through hole. To the inner pipe. As a result, the mixed fluid is efficiently separated without storing. The mixed fluid can be efficiently separated without causing an increase in size. In particular, the mixed fluid is stored in the spiral portion by the amount that the second separating means is slackened by setting the spiral of the first separating means to a predetermined slope and the spiral of the second separating means to be looser than the predetermined slope. However, the apparatus can be reduced in size by feeding the air while keeping the height of the entire apparatus low.

  Exemplary embodiments of a mixed fluid separator according to the present invention will be described below in detail with reference to the accompanying drawings.

  First, a refrigerant circuit to which the mixed fluid separator according to the present invention is applied will be described. FIG. 1 is a schematic view illustrating a refrigerant circuit to which a mixed fluid separator according to the present invention is applied. As shown in FIG. 1, the refrigerant circuit mainly circulates the refrigerant by connecting a compressor 51, a gas cooler (heat radiator) 52, an ejector 53, a mixed fluid separator 54, an evaporator 55, and an internal heat exchanger 56. It forms a possible refrigerant circulation path. As the circulating refrigerant, for example, HFC refrigerant (hydrofluorocarbon) or carbon dioxide is used. In particular, carbon dioxide is a refrigerant that has non-flammability and non-corrosion properties and has little influence on the ozone layer, and is suitable for use in a refrigerant circuit.

  The compressor 51 compresses the gas-phase refrigerant and supplies it to the gas cooler 52 in a high-temperature and high-pressure state. Examples of the compressor 51 include a reciprocating compressor, a rotary compressor, and a scroll compressor. In addition, there is an inverter compressor capable of adjusting these compression capacities. And what is necessary is just to apply suitably the compressor corresponding to the object which arrange | positions a refrigerant circuit, an environment, or the cost of a refrigerant circuit.

  The gas cooler 52 is for radiating heat from the high-temperature and high-pressure gas-phase refrigerant supplied from the compressor 51. As the gas cooler 52, for example, a fin tube type composed of a copper tube and an aluminum fin is used. Although not clearly shown in FIG. 1, the gas cooler 52 is provided with a gas cooler fan. The gas cooler fan is for cooling the gas cooler 52 by blowing air, and is driven by a fan motor.

  The ejector 53 sucks the refrigerant from the evaporator 55 side by a suction action using the liquid phase refrigerant supplied from the gas cooler 52, and increases the suction pressure reaching the compressor 51 by the pressure raising action. As shown in FIG. 1, the ejector 53 uses a two-phase flow ejection type ejector, and includes a nozzle portion 531, a mixing portion 532, and a diffuser portion 533. The nozzle unit 531 sucks the low-pressure refrigerant via the evaporator 55 by depressurizing and accelerating the high-pressure refrigerant via the gas cooler 52. The nozzle portion 531 has a nozzle valve 531a that adjusts the nozzle diameter for reducing the pressure of the high-pressure refrigerant. The mixing unit 532 mixes the low-pressure refrigerant with the high-pressure refrigerant. The diffuser unit 533 pressurizes and discharges the mixed refrigerant.

  The mixed fluid separation device 54 separates the mixed refrigerant as the mixed fluid supplied from the ejector 53 into a liquid phase refrigerant and a gas phase refrigerant, and further converts the liquid phase refrigerant containing oil as the mixed fluid into a liquid phase refrigerant and oil. It is for separation. Then, the mixed fluid separation device 54 supplies the liquid phase refrigerant to the evaporator 55 while returning the separated gas phase refrigerant and oil together to the compressor 51.

  The evaporator 55 is for cooling the ambient temperature by evaporating the liquid-phase refrigerant supplied from the mixed fluid separator 54 and absorbing ambient heat. The evaporator 55 is disposed inside a refrigerator having a heat insulating structure in, for example, a vending machine, a refrigerator, a freezer / refrigerated showcase, or a beverage dispenser. In particular, FIG. 1 shows a cycle for a vending machine, and evaporators 55 (55a, 55b,. 55c). The evaporators 55a, 55b, and 55c are connected in parallel to the respective paths branched from the mixed fluid separator 54 in three directions. In addition, electromagnetic valves 551a, 551b, and 551c as on-off valves are provided on the inlet sides of the evaporators 55a, 55b, and 55c in the branched paths. Then, by selectively opening the electromagnetic valves 551a, 551b, and 551c, the liquid phase refrigerant from the mixed fluid separation device 54 is supplied to the evaporators 55a, 55b, and 55c. Further, the outlet-side paths of the evaporators 55a, 55b, and 55c are gathered together and connected to the suction side of the nozzle portion 531 in the ejector 53.

  The internal heat exchanger 56 is for performing heat exchange between the high-pressure liquid-phase refrigerant supplied to the ejector 53 and the low-pressure gas-phase refrigerant. The internal heat exchanger 56 is provided between the gas cooler 52 and the ejector 53 and between the evaporator 55 and the ejector 53.

  In the refrigerant circuit described above, as shown in FIG. 1, each evaporator 55 (55a, 55b, 55c) is provided between the mixed fluid separator 54 and the evaporator 55 and on the outlet side of the mixed fluid separator 54. The electronic expansion valve 57 is provided at the site before branching to ().

  Next, the mixed fluid separator 54 will be described. FIG. 2 is a block diagram showing a mixed fluid separator according to the present invention, and FIG. 3 is a cross-sectional view of the gas-liquid separator shown in FIG.

  As shown in FIG. 2, the mixed fluid separation device 54 includes a gas-liquid separation unit (first separation unit) 541 and a liquid oil separation unit (second separation unit) 542. The gas-liquid separation unit 541 has an inner tube (first inner tube) 5411 and an outer tube (first outer tube) 5412. The inner pipe 5411 is made of a pipe member, and its upstream end 5411a is connected to the discharge side (diffuser portion 533) of the ejector 53 in the refrigerant circuit. In addition, a through-hole 5411b is provided in the tube wall (peripheral wall) of the inner tube 5411. As shown in FIG. 3, a plurality of through holes 5411b are provided in a manner facing the radially outward direction of the inner tube 5411 (for example, the vertical and horizontal directions in FIG. 3), and a plurality of through holes 5411b are provided along the extending direction of the inner tube 5411. It is. On the other hand, the outer pipe 5412 is made of a pipe member, and closes the upstream end 5412a located on the upstream end 5411a side of the inner pipe 5411 and surrounds the portion where the through hole 5411b of the inner pipe 5411 is provided, together with the inner pipe 5411. It has a double piping structure. In the gas-liquid separation unit 541, an inner tube 5411 and an outer tube 5412 are spirally formed around a predetermined axis O directed upward and downward.

  The liquid oil separation unit 542 includes an inner pipe (second inner pipe) 5421 and an outer pipe (second outer pipe) 5422. The inner tube 5421 and the outer tube 5422 are made of tube members and have a double tube structure in which the inner tube 5421 is inserted into the outer tube 5422. The outer pipe 5422 is provided with a branch pipe (direction changing portion) 5423 that communicates with a side portion at a predetermined height above a lower end disposed along the vertical direction (particularly the vertical direction) on the downstream end 5422a side. is there. The branch pipe 5423 is connected to the electronic expansion valve 57 in the refrigerant circuit. Further, the outer tube 5422 is provided with a storage portion 5422b formed by closing the lower end disposed along the vertical direction (particularly the vertical direction) on the downstream end 5422a side. That is, the storage portion 5422b here is a closed area provided from the closed downstream end 5422a of the outer pipe 5422 to the lower side of the branch pipe 5423. On the other hand, the downstream end 5421a side of the inner tube 5421 inserted in the outer tube 5422 reaches the storage portion 5422b, and is drawn out of the outer tube 5422 from the closed lower end of the outer tube 5422 through the storage portion 5422b. It is provided. In addition, a through hole 5421b is provided in the inner wall of the inner pipe 5421 that is located below the branch pipe 5423 and passes through the storage portion 5422b. The downstream end 5421a of the inner tube 5421 drawn out of the outer tube 5422 is connected to the suction side of the compressor 51 in the refrigerant circuit. In the liquid oil separating portion 542, an inner tube 5421 and an outer tube 5422 are formed in a spiral shape around the predetermined axis O at a position above the branch pipe 5423.

  In addition, the liquid oil separation part 542 in this Embodiment is continuously formed in the downstream of the said gas-liquid separation part 541, making the double piping structure of the gas-liquid separation part 541. FIG. That is, the inner pipe (first inner pipe) 5411 and the inner pipe (second inner pipe) 5421 are constituted by a series of pipe members, and the outer pipe (first outer pipe) 5412 and the outer pipe (second outer pipe). Tube) 5422 is formed of a series of tube members. The spiral at the gas-liquid separator 541 is set to a predetermined inclination θ1 with respect to the horizontal line L, and the spiral at the liquid oil separator 542 is set to an inclination θ2 that is looser than the predetermined inclination θ1.

  Hereinafter, the operation of the mixed fluid separator 54 will be described. The ejector 53 of the refrigerant circuit supplies the mixed refrigerant to the inner pipe 5411 of the gas-liquid separator 541 at a constant flow rate.

  Separation flow force acts on the mixed refrigerant passing through the spiral portion of the gas-liquid separation unit 541. The separation flow force includes centrifugal force, inertial force, gravity, pressure difference and the like. As shown in FIG. 3, the separated flow force biases the liquid-phase refrigerant having a larger specific gravity than the gas-phase refrigerant toward the outer radius of curvature of the inner tube 5411. Then, the liquid phase refrigerant is transferred to the outer tube 5412 through a through hole 5411 b provided in the inner tube 5411. On the other hand, the gas phase refrigerant having a small specific gravity stays in the inner pipe 5411. As a result, the mixed refrigerant is separated and the gas-phase refrigerant is sent to the inner pipe 5411, while the liquid-phase refrigerant is sent to the outer pipe 5412. The mixed refrigerant contains refrigerating machine oil (oil) for reducing mechanical friction in the compressor 51. Since this specific gravity of the refrigerating machine oil is larger than that of the gas-phase refrigerant, it is sent to the outer pipe 5412 together with the liquid-phase refrigerant.

  In the liquid oil separation unit 542, liquid phase refrigerant and refrigeration oil are sent to the spiral portion of the outer tube 5422 communicating with the outer tube 5412 of the gas-liquid separation unit 541, while the liquid-phase separation unit 541 is supplied to the inner tube 5411 of the gas-liquid separation unit 541. The gas phase refrigerant is sent to the spiral portion of the inner tube 5421 that communicates. In the outer tube 5422, the refrigerating machine oil having a relatively large specific gravity is stored in the storage unit 5422b by the action of inertia and gravity. On the other hand, the liquid phase refrigerant having a relatively small specific gravity is sent to the branch pipe 5423. Further, an inner tube 5421 provided with a through hole 5421b passes through the storage portion 5422b of the outer tube 5422, and the gas phase refrigerant is sent to the inner tube 5421 as described above. Therefore, the refrigerating machine oil stored in the storage unit 5422b moves from the through hole 5421b to the inside of the inner pipe 5421 and is sent to the inside of the inner pipe 5421 together with the gas phase refrigerant.

  As described above, in the mixed fluid separation device 54 described above, since the inner tube 5411 is formed in a spiral shape in the gas-liquid separation unit 541, the separation fluid force (centrifugation) is applied to the mixed refrigerant that flows inside the inner tube 5411. Force). This separated flow force is appropriately obtained by using the discharge speed by discharging the mixed refrigerant from the ejector 53 at a high speed.

  As a configuration for separating the liquid-phase refrigerant and the gas-phase refrigerant, the inner tube 5411 and the outer tube 5412 have a double tube structure, the double tube is formed in a spiral shape, and the through-hole 5411b is provided in the inner tube 5411. As a result, the liquid refrigerant having a relatively high specific gravity moves to the outer pipe 5412 and is sent by the separation flow force, while the gas phase refrigerant having a relatively low specific gravity remains in the inner pipe 5411 and is sent. As a result, the liquid phase refrigerant and the gas phase refrigerant can be separated. In this case, since the gas-phase refrigerant and the liquid-phase refrigerant are separately sent to the inner pipe 5411 and the outer pipe 5412, the gas-phase refrigerant and the liquid-phase refrigerant (and the refrigerating machine oil) are sent to the liquid-oil separator 542. On the other hand, it can be easily transferred.

  In particular, in the gas-liquid separator 541, a plurality of through holes 5411b provided in the inner tube 5411 are provided in a manner facing the radially outward direction of the inner tube 5411. For this reason, when the mixed refrigerant has a low flow rate, the centrifugal force and the inertial force are reduced and the separation performance is lowered. Even in such a case, the comparison is made from the through-hole 5411b facing downward as shown in FIG. The liquid phase refrigerant and the refrigerating machine oil having a large specific gravity are moved to the outer pipe 5412. As a result, even if the mixed refrigerant has a low flow rate, the separation performance between the gas-phase refrigerant and the liquid-phase refrigerant (and the refrigerating machine oil) can be maintained.

  Further, in the above-described mixed fluid separation device 54, the liquid oil separation unit 542 is provided with a storage unit 5422 b that closes the downstream end 5422 a of the outer tube 5422, and branches to a side portion of the outer tube 5422 that is above the storage unit 5422 b. A pipe 5423 was provided. For this reason, the refrigerating machine oil having a relatively large specific gravity is stored in the storage unit 5422b, and the liquid phase refrigerant having a relatively small specific gravity is sent to the branch pipe 5423. As a result, the liquid phase refrigerant and the refrigeration oil can be separated. In this case, since the pipe member has the storage part 5422b, it is not necessary to provide a tank-shaped storage part for storing the liquid-phase refrigerant as in the conventional example, and the space efficiency for installing the liquid oil separation part 542 is improved. It becomes possible to improve.

  In particular, in the liquid oil separation part 542, both the inner pipe 5421 and the outer pipe 5422 are formed in a spiral shape at a position above the branch pipe 5423. For this reason, since the liquid phase refrigerant and the refrigeration oil are stored in the spiral portion before reaching the storage unit 5422b, the storage volume for storing the liquid phase refrigerant and the refrigeration oil separated by the gas-liquid separation unit 541 is defined as a tank type. You can get without. Furthermore, by forming the spiral inclination θ2 of the liquid-oil separator 542 to be looser than the predetermined inclination θ1 of the gas-liquid separator 541, the space efficiency for installing the liquid-oil separator 542 can be further improved. It becomes possible. Here, the gas-liquid separation unit 541 requires an inclination of a predetermined inclination θ1 (or more) in order to send the liquid refrigerant and the refrigeration oil separated into the outer pipe 5412 downward by gravity. On the other hand, the liquid oil separation unit 542 stores the separated liquid refrigerant and refrigerating machine oil, and therefore, the spiral inclination θ2 does not require an inclination of the predetermined inclination θ1.

  And since the through-hole 5421b is provided in the surrounding wall of the inner pipe 5421 which passes the storage part 5422b, the gaseous-phase refrigerant | coolant which moves the separated refrigerator oil to the inside of the inner pipe 5421, and sends the inside of the inner pipe 5421 The refrigeration oil can be sent to the compressor 51 together with the above. Thereby, refrigerating machine oil can be supplied to the compressor 51 and the damage by abrasion etc. of the compressor 51 can be prevented.

  Furthermore, since the branch pipe 5423 in which the liquid-phase refrigerant flows backward is connected to the evaporator 55 side, the refrigeration cycle can be operated efficiently. In addition, since the downstream end 5421a of the inner pipe 5421 is connected to the compressor 51, there is no flow of liquid-phase refrigerant to the compressor 51, so that failure due to liquid compression in the compressor 51 can be prevented. .

  In addition, although the mixed fluid separation apparatus demonstrated by embodiment mentioned above has illustrated the mixture of a liquid phase refrigerant | coolant and a gaseous-phase refrigerant | coolant, and the mixture of a liquid phase refrigerant | coolant and refrigerating machine oil as mixed fluids, The present invention can also be applied to the case of separating mixed fluids having different specific gravity.

It is the schematic which illustrates the refrigerant circuit to which the mixed fluid separation apparatus which concerns on this invention is applied. It is a block diagram which shows the mixed fluid separation apparatus which concerns on this invention. It is sectional drawing of the gas-liquid separation part shown in FIG. It is sectional drawing which shows the effect | action of the liquid oil separation part shown in FIG.

Explanation of symbols

51 Compressor 52 Gas cooler
53 Ejector 531 Nozzle part 531a Nozzle valve 532 Mixing part 533 Diffuser part 54 Mixed fluid separation device 541 Gas-liquid separation part 5411 Inner pipe 5411a Upstream end 5411b Through hole 5412 Outer pipe 5412a Upstream end 542 Liquid oil separation part 5421 Inner pipe 5421a 5421b Through-hole 5422 Outer pipe 5422a Downstream end 5422b Reservoir 5423 Branch pipe 55 (55a, 55b, 55c) Evaporator 551 (551a, 551b, 551c) Electromagnetic valve 56 Internal heat exchanger 57 Electronic expansion valve (expansion valve)
L horizontal line O predetermined axis line θ1 predetermined inclination θ2 inclination

Claims (3)

An apparatus for separating a mixed fluid in which a plurality of fluids having different specific gravities are mixed,
An inner pipe for sending a mixed fluid into the interior;
An outer tube surrounding an outer periphery of the inner tube, and the inner tube and the outer tube are both formed in a spiral shape while providing a plurality of through holes facing radially outward in the peripheral wall of the inner tube. Mixed fluid separator. An apparatus for separating a mixed fluid in which a plurality of fluids having different specific gravities are mixed,
An outer pipe that closes the lower end arranged along the vertical direction and provides a branch pipe on the side portion at a predetermined height from the lower end to send the mixed fluid inside;
An inner pipe that is inserted along the outer pipe and has a through hole in a peripheral wall at a position lower than the branch pipe to allow other fluid to flow inside, and is provided at a position above the branch pipe. A mixed fluid separation device characterized in that both a tube and an outer tube are formed in a spiral shape. An apparatus for separating a mixed fluid in which a plurality of fluids having different specific gravities are mixed,
A first inner pipe for sending a fluid mixture therein, and a first outer pipe surrounding the outer circumference of the first inner pipe, and a plurality of through-holes facing radially outward are provided in the peripheral wall of the first inner pipe While, the first separation means in which the first inner pipe and the first outer pipe are both spirally formed around a predetermined axis directed upward and downward,
A second outer pipe that communicates downstream of the first outer pipe and that has a lower end disposed along the vertical direction and has a branch pipe on a side at a predetermined height from the lower end; and the first A second inner pipe that is in communication with the downstream of the inner pipe, is inserted along the second outer pipe, and has a through hole in a peripheral wall at a position below the branch pipe; A second separating means having a second inner tube and a second outer tube formed in a spiral shape at a position, the spiral of the first separating means is set to a predetermined inclination, and the spiral of the second separating means is A mixed fluid separator characterized by being formed loosely.

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