JP2002195702A - Extraction and separation mechanism, refrigerating cycle apparatus, heat source unit and regeneration method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove the problem of the oil in a compressor being drained and thus reliability tends to be lost, which is caused by the infeasibility of returning only ester oil or ether oil to the compressor after being separated, due to the mingling of mineral oil, which has been recovered from existing piping in the ester oil or ether oil once new oil flows out of an outdoor unit, in the case where abundant of refrigerator oil in the compressor temporarily flows out due to foaming, when the compressor is started with liquid refrigerant being stagnated therein, resulting in the inability to capture all of the refrigerant oil, even with a high performance oil separator. SOLUTION: A compressor, a heat source side heat exchanger and an accumulator are provided. There are also provided an extraction and separation mechanism, in which the piping between the heat exchanger and liquid piping is connected to inflow piping, piping for connecting the lower part of the accumulator to inflow piping for extractive, piping for diverging compressor suction piping for connection with outflow piping, piping for diverging the compressor suction piping for connection with extraction outflow piping, and a raffinate storage vessel which is connected to raffinate outflow piping for storing raffinate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration cycle apparatus.
Or, it relates to the replacement of refrigerant in air conditioning / refrigeration equipment. Further details
In other words, when replacing the refrigerant in the refrigeration cycle
Extraction separation mechanism for extraction and separation of refrigerating machine oil and refrigeration using it
It relates to a cycle device. Specific examples are mainly HFC-based
When installing a refrigeration / air conditioner using refrigerant, HC
Used for refrigeration and air conditioners using FC-based refrigerants or CFC-based refrigerants
When diverting existing extension piping,
Of refrigeration oil for HCFC or CFC refrigerant remaining in the
Has an extraction and separation mechanism for purifying and recovering and an extraction and separation mechanism
It relates to refrigeration and air conditioners.

[0002]

2. Description of the Related Art FIG. 23 shows a conventional refrigeration cycle apparatus for refrigeration / air conditioning using an existing pipe disclosed in Japanese Patent Application Laid-Open No. 2000-9368, which cleans and recovers mineral oil remaining in the existing pipe. It is. In the refrigeration cycle shown in FIG. 23, when performing the cooling operation, the high-temperature and high-pressure gas refrigerant compressed by the compressor 23 is discharged from the compressor 23 together with the HFC refrigerating machine oil and enters the oil separator 53. Here, the refrigerating machine oil for the HFC is completely separated, and only the gas refrigerant flows into the heat source side heat exchanger 25 via the four-way valve 24 and is condensed and liquefied. The condensed and liquefied refrigerant flows through the first connection pipe C via the first operation valve 57. When the liquid refrigerant of the HFC flows through the first connection pipe C, the mineral oil or the like remaining in the first connection pipe C is washed little by little and flows together with the liquid refrigerant of the HFC.
0, where the pressure is reduced to a low pressure to be in a low-temperature two-phase state, and the load-side heat exchanger 39 evaporates and gasifies. The evaporated and gasified refrigerant flows into the second connection pipe D.
The mineral oil flowing into the second connection pipe D flows so as to be dragged on the inner surface of the pipe by using the shearing force at the interface between the mineral oil and the refrigerant gas generated from the speed difference between the gas refrigerant and the refrigerant as the driving force. The gas refrigerant containing the mineral oil flowing through the connection pipe D flows into the foreign matter capturing means 55 via the four-way valve 24. Here, the mineral oil is separated from the gas refrigerant, and only the gas refrigerant returns to the compressor 23 via the accumulator 26.

FIG. 24 shows a conventional example of a hermetic compressor disclosed in Japanese Patent Application Laid-Open No. 09-324756, in which a liquid level is controlled to separate refrigerating machine oil and liquid refrigerant. Closed casing 70
An extraction port 66 is provided at the same height as the bottom surface of the closed casing 70, and an upper portion and a bottom surface of the closed casing 70 are connected to an extraction port 66 provided at the same height as the bottom surface of the closed casing 70 by an extraction pipe 67. Liquid refrigerant 68 mainly composed of HFC
By providing a float 65 having a specific gravity that moves in conjunction with the liquid level of the liquid, the liquid refrigerant separated into two phases is extracted from the bottom surface in the closed casing 70, and the insoluble lubricating oil 71 is supplied to the oil supply pipe 64.
It is intended to be more inhaled.

[0004]

In the refrigerating cycle device described in Japanese Patent Application Laid-Open No. 2000-9368, it is necessary to completely recover ester oil or ether oil used as a new refrigerating machine oil in an outdoor unit. There is a problem that a high performance oil separator is required, the structure becomes complicated, and the production cost increases.

Further, when the compressor is started with the liquid refrigerant laid in the compressor, a large amount of the refrigerating machine oil in the compressor temporarily flows out due to forming. May not be caught. In this case, once new oil spills from the outdoor unit, the mineral oil recovered from the existing piping and the ester oil or ether oil are mixed, and only the ester oil or ether oil is separated and returned to the compressor. , The compressor oil is depleted and may lose reliability.

[0006] Further, in the extraction mechanism as disclosed in Japanese Patent Application Laid-Open No. 09-324756, a mixture of ester oil or ether oil used as a new refrigerating machine oil and mineral oil which is a refrigerating machine oil remaining in an existing pipe is mixed. If the oil separates into two phases and floats on the refrigerant liquid, only the refrigerating machine oil remaining in the existing piping cannot be separated and recovered, and the effect of new ester oil or ether oil degraded mineral oil And the problem of losing reliability.

[0007] The present invention has been made to solve the above-mentioned problems, and has a first refrigerant, for example, an HCFC system or the like.
In a refrigeration cycle device or a refrigeration / air-conditioning device that diverts an existing pipe in which a CFC-based refrigerant was used, a second refrigerant, for example, a new ester oil or ether oil, which is a refrigerating machine oil of an HFC-based refrigerant, is used in the existing pipe. CFC remaining
Even if mineral oil that is the refrigerating machine oil of the refrigeration cycle of the system or the HCFC system is mixed, the refrigeration / air conditioner performs the normal operation and separates and recovers the mineral oil remaining in the existing piping.
An object of the present invention is to suppress deterioration of a new ester oil or ether oil, to facilitate installation of a refrigeration / air conditioner using an existing pipe, and to enhance reliability of a refrigeration cycle.

[0008]

According to a first aspect of the present invention, there is provided an extraction / separation mechanism which mixes an extractant and an extractant in a ratio of two phases, in which an extract and a raw solvent are mixed. Further, in the extraction / separation mechanism in which the extract in the extract is extracted into the extractant and the density of the raffinate is smaller than the density of the extract, a mechanism for separating only the raffinate is provided.

The extraction and separation mechanism according to the present invention is described in claim 2.
As described in the above, having a length in the vertical direction, the extractant inflow pipe, the extractant inflow pipe, the extractant inflow pipe and the raffinate liquid outflow pipe disposed at a position higher than the extractant inflow pipe An extraction container for extracting a predetermined component from an extract with an extractant, and a liquid level generating container having a length in the vertical direction and an extractant outflow pipe, respectively, communicate with each other at a lower portion and an upper portion in the vertical direction, The extractant outflow pipe and the raffinate outflow pipe are arranged so that the liquid level formed by the raffinate outflow pipe is higher than the liquid level formed by the extractant outflow pipe.

[0010] The extraction and separation mechanism according to the present invention is described in claim 3.
As described in the item (2), in the above-mentioned item (2), the extract inflow pipe is arranged at a position lower than the extractant inflow pipe.

The extraction / separation mechanism according to the present invention is described in claim 4.
As described in the above, has a length in the vertical direction, the extractant inflow pipe, the extractant inflow pipe, the extractant inflow pipe and the raffinate liquid outflow pipe arranged at a position higher than the extractant inflow pipe, An extraction liquid outlet pipe arranged at a position lower than the extract liquid inlet pipe, and an extraction container for extracting a predetermined component from the extract with an extractant, and a constant pressure difference between the bottom surface and the liquid level in the extraction container. And a control mechanism for arranging the raffinate outflow pipe such that the liquid level formed by the raffinate outflow pipe is higher than the liquid level when only the extractant is present in the extraction container. It is.

The extraction and separation mechanism according to the present invention is described in claim 5.
As described in the above, has a length in the vertical direction, the extract inflow pipe, the raffinate outflow pipe arranged at a position higher than the extract inflow pipe, and disposed at a position lower than the extract inflow pipe And an extraction container for extracting a predetermined component from the extract by the extractant, and a liquid surface having a length in the vertical direction and an extractant inflow pipe and an extractant outflow pipe. Container and
Communicate with each other at the bottom and top in the vertical direction,
The extractant outflow pipe and the raffinate outflow pipe are arranged so that the liquid level formed by the raffinate outflow pipe is higher than the liquid level formed by the extractant outflow pipe.

According to the present invention, there is provided an extraction / separation mechanism.
As described in any one of claims 2 to 5, the horizontal cross-sectional area of a portion near the connecting portion of the raffinate outflow pipe is lower than the horizontal portion of the portion near the connecting portion. It is smaller than that.

According to the present invention, there is provided an extraction / separation mechanism.
As described in, an extraction container for extracting a predetermined component from the extract by the extractant, a mixing pipe connected to the extraction container to mix and flow the extractant and the extract, and a check valve connected to the extraction container A raffinate outflow pipe having: a vent pipe having one end opened at the lower part in the extraction container and the other end opened at the upper part, and one end opened at the upper part inside the extraction container and the other end opened outside the extraction container. A liquid return pipe, and a communication pipe that communicates with an intermediate part of the vent pipe and an intermediate part of the liquid return pipe at a position lower than a connection part of the raffinate outflow pipe.

The extraction and separation mechanism according to the present invention is described in claim 8.
The accumulator and the extraction container according to claim 7 are integrally formed, and the other end of the liquid return pipe is opened inside the accumulator.

According to the present invention, there is provided an extraction / separation mechanism.
As described in the above, an extraction container for extracting a predetermined component from the extract by the extractant, a mixing pipe connected to the extraction container to mix and flow the extractant and the extract, and one end at an upper part in the extraction container A vent pipe that is open and has the other end open to the outside of the extraction vessel, a liquid return pipe that has one end open to the lower part (bottom) inside the extraction vessel and has the other end open to the outside of the extraction vessel, and the density of the raffinate And a float valve having a density intermediate between the density of the extract and the density of the extract and opening and closing the one end of the liquid return pipe.

The extraction / separation mechanism according to the present invention is as follows.
10. The residue according to claim 9, further comprising a check valve and connected to the extraction vessel at a position higher than the liquid level of the extract controlled by the float valve. It has a liquid outflow pipe.

A heat source unit of a refrigeration cycle apparatus according to the present invention is a heat source unit of a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger and an accumulator as described in claim 11. The extraction and separation mechanism according to any of the above, comprising a raffinate liquid storage container, connecting the downstream of the heat source side heat exchanger and the extraction agent inflow pipe of the extraction and separation mechanism,
Connecting the lower part of the accumulator and the extract inflow pipe, connecting the suction pipe of the compressor and the extractant outflow pipe of the liquid level generator, the raffinate outflow pipe and the raffinate storage container, Are connected.

According to a twelfth aspect of the present invention, there is provided a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger, an accumulator, and an oil separator connected to a discharge side of the compressor. In the heat source device of the cycle device, the extraction / separation mechanism according to any one of claims 1 to 4, and a raffinate storage container, and a downstream of the oil separator and an extractant inflow pipe of the extraction / separation mechanism. Connected via a throttling means, connects the lower part of the accumulator and the extractant inflow pipe, connects the suction pipe of the compressor and the extractant outflow pipe, and from the downstream of the oil separator. A pipe between the throttle means, a refrigerant heat exchanger for exchanging heat between a pipe between the suction pipe of the compressor and the extractant outflow pipe, the raffinate outflow pipe and the raffinate storage vessel, Are connected.

The heat source unit of the refrigeration cycle apparatus according to the present invention is a heat source unit of a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger and an accumulator, as described in claim 13. Extraction and separation mechanism, and a raffinate storage tank, connecting the downstream of the heat source side heat exchanger and the extractant inflow pipe of the extraction and separation mechanism, and connecting the lower part of the accumulator and the extract inflow pipe connection,
Connecting the suction pipe and the extractant outflow pipe of the compressor,
The suction pipe of the compressor and the extraction liquid outflow pipe are connected, and the raffinate outflow pipe and the raffinate storage container are connected.

According to a fourteenth aspect of the present invention, there is provided a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger, an accumulator, and an oil separator connected to a discharge side of the compressor. A heat source device of a cycle device, comprising: the extraction / separation mechanism according to claim 5 or 6; and a raffinate storage container, wherein a downstream of the heat source side heat exchanger and an extractant inflow pipe of the extraction / separation mechanism are connected. Connecting the oil return circuit of the oil separator to the extract flow inflow pipe, connecting the suction pipe of the compressor and the extractant outflow pipe, and connecting the suction pipe of the compressor and the extract outflow pipe Are connected, and the raffinate outflow pipe and the raffinate storage container are connected.

According to a twelfth aspect of the present invention, there is provided a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger, an accumulator, and an oil separator connected to a discharge side of the compressor. In the heat source device of the cycle device, the extraction / separation mechanism according to any one of claims 7 to 10, and a raffinate storage container, and a downstream of the heat source side heat exchanger and a mixing pipe of the extraction / separation mechanism. Connecting the oil return circuit of the oil separator to the mixing pipe, connecting the other end of the liquid return pipe to a low pressure side pipe or device, connecting the raffinate outflow pipe and the raffinate It is connected to a storage container.

A heat source unit of a refrigeration cycle apparatus according to the present invention is connected to a compressor, a heat source side heat exchanger, an integrated accumulator according to claim 8, and a discharge side of the compressor. In the heat source unit of the refrigeration cycle apparatus including the separated oil separator, a raffinate storage container is provided, and a downstream of the heat source side heat exchanger is connected to a mixing pipe of the extraction / separation mechanism, and a return of the oil separator is provided. Connecting the oil circuit and the mixing pipe,
The raffinate outflow pipe is connected to the raffinate storage container.

The heat source unit of the refrigeration cycle apparatus according to the present invention is the heat source unit according to any one of claims 11 to 16, wherein the raffinate liquid storage container has a raffinate liquid storage container. A mechanism is provided to prevent the liquid in the container from flowing back to the outside.

The heat source unit of the refrigerating cycle device according to the present invention is the heat source unit according to any one of claims 11 to 17, wherein the raffinate liquid or the raffinate liquid is contained in the raffinate liquid storage container. An adsorbent for adsorbing the raw solvent is provided.

The heat source unit of a refrigeration cycle apparatus according to the present invention is the heat source unit according to any one of claims 11 to 18, wherein the extractant is a hydrofluorocarbon-based refrigerant, As a mixed oil of either an ester oil or an ether oil and a mineral oil or a hard alkylbenzene oil.

According to a twentieth aspect of the present invention, there is provided a heat source unit for a refrigeration cycle apparatus according to any one of the eleventh to nineteenth aspects, wherein the temperature in the extraction vessel is set to a low pressure of the refrigeration cycle. At the saturation temperature.

According to a refrigeration cycle apparatus of the present invention, a use side machine including a use side heat exchanger and a heat source machine according to any one of claims 11 to 20 are connected by a connecting pipe. They are connected to form a refrigerant circuit.

The refrigeration cycle apparatus according to the present invention, as described in claim 22, is the one according to claim 21, wherein a connection pipe of an existing refrigeration cycle apparatus is used as the connection pipe.

According to a refrigeration cycle apparatus updating method according to the present invention, as described in claim 23, the heat source unit of the existing refrigeration cycle unit is replaced with the heat source unit according to any one of claims 11 to 20, and the refrigerant is replaced. Is to be replaced.

[0031]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters, and description thereof may be simplified or omitted. Embodiment 1 FIG. FIG. 1 is a refrigeration cycle apparatus equipped with an extraction / separation mechanism or a refrigeration /
1 shows a refrigerant circuit of an air conditioner. In FIG. 1, 23 is a compressor, 24 is a four-way valve, 25 is a heat source side heat exchanger, and 26 is an accumulator. Reference numeral 1 denotes an extraction vessel, which is connected to the lower part of the accumulator 26 via the inflow pipe 2 and the heat source side heat exchanger 25 downstream of the heat source side heat exchanger 25 via the inflow pipe 22 and the valve 31. 38. Furthermore, it is connected to the raffinate liquid storage container 29 via the raffinate liquid outflow pipe 4, and the upper part of the raffinate liquid storage container 29 and the suction pipe 30a are connected by a refrigerant pipe. Reference numeral 6 denotes a liquid level generating vessel, and the extraction vessel 1 and the liquid level generating vessel 6 are connected by an upper connecting pipe 8 and a lower connecting pipe 9. One end of the outflow pipe 7 is connected to the liquid level generating vessel 6, and the other end is connected to the suction pipe 30 of the compressor 23 by the pipe 30 via the refrigerant heat exchanger 28 and the valve 32.
a and the heat source unit or the outdoor unit 51
To form Reference numeral 39 denotes a load side heat exchanger or a use side heat exchanger, and reference numeral 40 denotes a throttling device, which forms a use side unit 52 or an indoor unit 52. The outdoor unit 51 and the indoor unit 52 are connected by a liquid pipe 38 (first connection pipe) and a gas pipe 37 (second connection pipe). In addition,
The suffixes a and b in the drawing indicate that the system is a multi-type refrigeration / air-conditioning system having a plurality of indoor units.

A first refrigerant, for example, HCFC or C
An existing refrigeration / air-conditioning system using an FC-based refrigerant and a first refrigeration oil (lubricating oil), for example, a mineral oil or a hard alkylbenzene oil, is replaced with a second refrigerant, for example, an HFC-based refrigerant and a second refrigeration oil. The refrigerant circuit as described above is formed by substituting a refrigeration / air-conditioning device using machine oil (lubricating oil), for example, ester oil or ether oil.

When the refrigeration / air-conditioning apparatus having the above configuration is installed, the liquid and gas pipes, or the liquid and gas pipes and indoor units used in the unit filled with the HCFC or CFC refrigerant are used. If an outdoor unit is newly installed using HFC refrigerant and ester oil as refrigerating machine oil, mineral oil used as HCFC or CFC refrigerating machine oil will remain in the liquid and gas pipes and indoor unit. are doing. The operation when the refrigeration cycle performs the cooling operation in such a state will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 23 radiates heat in the heat source side heat exchanger 25,
It condenses and liquefies and flows through the liquid pipe 38. The liquid refrigerant flowing through the liquid pipe 38 cleans the mineral oil in the liquid pipe 38 while dragging the mineral oil remaining in the liquid pipe 38 by the interface shear force generated between the liquid refrigerant and the mineral oil. The liquid refrigerant flowing through the liquid pipe 38 enters the indoor unit 52, evaporates and evaporates, flows through the gas pipe 37, and draws the mineral oil remaining in the gas pipe 37 while dragging it with the shear force generated between the gas refrigerant and the mineral oil. Clean the mineral oil in the pipe. The gas refrigerant flowing through the gas pipe 37 returns to the outdoor unit 51, and returns to the compressor 23 via the four-way valve 24 and the accumulator 26. At this time, the ester oil taken out of the compressor 23 circulates in the existing refrigerant pipe together with the refrigerant, mixes with the mineral oil remaining in the existing pipe, and enters the accumulator 26 together with the refrigerant.

When separating the recovered mineral oil from the existing pipe, the valve 31, the valve 32 and the valve 34 are opened, the high-pressure liquid refrigerant is throttled by the valve 31 to the low-pressure two-phase refrigerant, and extracted through the inflow pipe 22. Lead to container 1. Further, the mixed oil of the mineral oil and the ester oil recovered from the existing pipe flows from the accumulator 26 into the extraction container 1 through the extract inlet pipe 2. In the extraction vessel 1, when the ester oil in the mixed oil of the mineral oil and the ester oil is extracted by the refrigerant, the mineral oil-rich oil, which is the raffinate, is separated into two phases in the upper layer, and the amount of the mineral oil-rich oil increases. Is stored in the raffinate storage container 29 via the raffinate outflow pipe 4. The mixture of the lower layer refrigerant and the oil rich in ester oil is
The refrigerant flows out of the outflow pipe 7 through the inside of the liquid level generating container 6, and the liquid refrigerant evaporates and vaporizes in the refrigerant heat exchanger 28, and only the oil rich in ester oil flows into the suction pipe 30 a of the compressor 23.

Next, the operation when the heating operation is performed will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 23 flows through the gas pipe 37 and cleans the mineral oil in the gas pipe while dragging the mineral oil remaining in the gas pipe 37 by a shear force generated between the gas refrigerant and the mineral oil. I will do it. The gas refrigerant flowing through the gas pipe 37 radiates heat in the load-side heat exchanger 39, condenses and liquefies, and is throttled by the expansion device 40 to become a low-pressure two-phase refrigerant. The low-pressure two-phase refrigerant flows through the liquid pipe 38 and cleans the mineral oil in the liquid pipe 38 while dragging the mineral oil remaining in the liquid pipe 38 by the interfacial shear force generated between the liquid or gas and the mineral oil. The gas-liquid two-phase refrigerant flowing through the liquid pipe 38 enters the outdoor unit 51, evaporates in the heat source side heat exchanger 25, and returns to the compressor 23 via the four-way valve 24 and the accumulator 26. At this time, the ester oil taken out of the compressor 23 circulates in the existing refrigerant pipe together with the refrigerant, mixes with the mineral oil remaining in the existing pipe, and enters the accumulator 26 together with the refrigerant.
The accumulator 26 stores an amount of liquid refrigerant corresponding to the difference between the required amount of refrigerant for cooling and the amount of refrigerant for heating.

When separating the recovered mineral oil from the existing pipe, the valve 31 is closed and the valves 32 and 34 are opened. In the accumulator 26, since excess liquid refrigerant is accumulated,
Mineral oil recovered from existing pipes is either floating near the liquid surface or dissolved in liquid refrigerant. At this time, since the mineral-rich oil floating near the liquid level in the accumulator 26 does not return to the compressor 23 during the heating operation, only recovery of the mineral oil dissolved in the refrigerant is considered. From the accumulator 26, the mixed oil of the mineral oil and the ester oil recovered from the existing pipe is dissolved in the refrigerant and flows into the extraction container 1 via the extract inlet pipe 2. In the extraction container 1, the inside of the extraction container 1 is overheated by a heat source (not shown), and the refrigerant is evaporated to a predetermined amount. Here, the heat source may be arranged on the extraction flow inflow pipe 2. At this time, as the amount of the liquid refrigerant decreases, an amount of mineral-rich oil that has exceeded the solubility in the liquid refrigerant precipitates, and forms a phase near the liquid surface in the extraction vessel 1. Here, since the raffinate liquid storage container 29 is connected to the suction pipe 30a of the compressor by the refrigerant pipe, the pressure in the raffinate liquid storage container 29 can be made lower than the pressure in the extraction container 1. Accordingly, the oil rich in mineral oil which forms a phase near the liquid level of the extraction vessel 1 is stored in the extraction vessel 1 via the raffinate outflow pipe 4 according to the pressure difference between the extraction vessel 1 and the raffinate storage vessel 29. It flows into the container 29 and is stored in the raffinate storage container 29. The mixture of the refrigerant and the oil rich in ester oil flows out of the outflow pipe 7 through the liquid level generating container 6, and the liquid refrigerant evaporates and vaporizes slightly in the refrigerant heat exchanger 28 to the suction pipe of the compressor 23. Inflow.

Next, the structure of the extraction and separation mechanism and the principle of extraction and separation will be described. FIG. 2 is a schematic configuration diagram of the extraction separation mechanism. In FIG. 2, reference numeral 1 denotes an extraction container, to which an extract inflow pipe 2, an extractant inflow pipe 3, and a raffinate outflow pipe 4 are connected. In addition, from the viewpoint of mixing a low-density extract and a high-density extractant, the positions at which these pipes are connected are the raffinate outflow pipes 4 from above in the vertical direction.
The extractant inflow pipe 3 and the extractant inflow pipe 2 are connected to the extraction container 1 in this order, so that the extractant rising in the extraction container 1 by buoyancy and the extractant descending in the extraction container 1 are appropriately mixed. It is desirable to do. Reference numeral 6 denotes a liquid level generating container,
The liquid level generating container 6 is connected with the upper connecting pipe 8 and the lower connecting pipe 9. Outflow pipe 7
Is connected to a position slightly lower than the raffinate outflow pipe 4. At this time, the difference between the height of the outflow pipe 7 and the height of the raffinate outflow pipe 4 in the vertical direction is determined by the thickness of the raffinate forming a phase above the liquid surface in the extraction vessel 1. When the extraction / separation mechanism of FIG. 2 is applied to the refrigerant circuit of FIG. 1, the inflow pipe 22 of FIG. 1 and the extractant inflow pipe 3 of FIG. 2 are the same.

The extraction separation operation in the extraction / separation mechanism having such a configuration will be described. When the refrigerant liquid is caused to flow from the extractant inflow pipe 3, the liquid level in the extraction vessel 1 comes to be substantially the same as the position of the outflow pipe 7 from the principle of Pascal. By setting the outflow pipe 7 at a position slightly lower than the raffinate outflow pipe 4,
When no raffinate is generated, the liquid level formed in the extraction vessel 1 is lower than the raffinate outflow pipe 4, so that the liquid refrigerant is prevented from flowing out of the raffinate outflow pipe 4. Can be. Next, when a mixed oil of an ester oil and a mineral oil is caused to flow in from the extract inlet pipe 2, the ester oil is extracted into the refrigerant from the mixed oil of the mineral oil and the ester oil in the extraction container 1, and the residual liquid is extracted from the density difference. The oil rich in mineral oil is separated into two phases and floats on the upper surface. The phenomenon at this time will be described with reference to the schematic diagram of FIG. Now, in the extraction vessel 1, the liquid refrigerant is filled up to the height of H3 and the mineral oil is filled up to the height of H2.
Is assumed to contain refrigerant liquid up to H1. Since mineral oil has a lower density than the refrigerant liquid, as shown in FIG.
The height ΔH of the liquid surface height between the extraction container 1 and the liquid surface generation container 6 increases as the height of the container increases. Therefore, the outflow pipe 7
Is slightly lower than the raffinate outflow pipe 4 within the range of ΔH, so that the
At the upper part of the liquid level, drain the oil rich in mineral oil that forms a phase
Can be discharged from When no mineral oil is present in the extraction vessel 1, the outflow pipe 7 and the raffinate outflow pipe 4 have the same liquid level, and the outflow pipe 7 is located at a position slightly lower than the raffinate outflow pipe 4. The liquid refrigerant does not flow out of the raffinate outflow pipe 4.

Further, the ratio of the mixed oil of the ester oil and the mineral oil and the refrigerant flowing into the extraction vessel 1 and the amount of the flow are determined as follows. FIG. 5 shows a phase separation characteristic curve, and FIG. 6 shows an equilibrium curve. 5 and FIG. 6 can be easily understood if they are arranged horizontally, but they cannot be arranged horizontally at the time of filing due to restrictions on the application format, and are therefore shown vertically. If FIG. 5 and FIG. 6 are arranged horizontally so that the horizontal axis of both figures is on the same extension line, the line segment EJ of FIG.
Are connected on the same extension line. In FIG. 5, A is the point of 100% mineral oil, B is the point of 100% refrigerant, F is the composition of the extract, S is the composition of the extractant, and Δ is the extract of the composition of F and the extractant of the composition of S. This is the composition when mixing at a certain ratio and assuming that two phases are not separated. When Σ is in the region where two phases are separated, it is separated into an upper composition R and a lower composition E. The point E at this time is shown in FIG.
Can be determined from the equilibrium curve shown in FIG. The ratio PR of the ester oil to the mineral oil in the upper phase can be obtained as the intersection of the extended line connecting the points B and R and the line segment AC, and the extract and the extractant are set so that the ratio of the mineral oil is maximized. Is determined. Here, the inflow amount when the mixed oil of the ester oil and the mineral oil and the refrigerant are allowed to flow into the extraction container 1 is determined in advance by the extraction speed, and the inflow amount of the mixed oil of the refrigerant, the ester oil, and the mineral oil into the extraction container 1 is determined. The control is performed based on the flow resistance of the pipe. By setting the temperature in the extraction container 1 as low as possible, even if the amount of the extract is small, the two-phase separation is performed, so that even a small amount of mineral oil can be separated. In particular, when this extraction / separation mechanism is used in combination with a refrigeration cycle as shown in FIG. 1, by setting the extraction vessel 1 to a low pressure, two-phase separation facilitates precipitation of mineral-rich oil. Therefore, there is an effect of improving the separation accuracy of the mineral oil. Further, by confirming the separation accuracy of the mineral oil on a trial basis, the pressure in the extraction vessel 1 may be set to an intermediate pressure between a high pressure and a low pressure as appropriate. In general, the temperature in the extraction vessel 1 is preferably set to the low pressure saturation temperature of the refrigeration cycle.

Therefore, it is used in a refrigeration / air-conditioning system operated by using a CFC-based or HCFC-based refrigerant.
An outdoor unit or an outdoor unit and an indoor unit are newly installed using the existing piping in which mineral oil, which is the refrigerating machine oil of the FC or HCFC refrigeration cycle, remains. The mineral oil remaining in the existing pipe or the existing pipe and the indoor unit is collected as necessary while performing, and the deterioration of the ester oil can be prevented by mixing the deteriorated mineral oil and the ester oil. In addition, R407C, R404A, R410
When an HFC-based refrigerant such as A or R32 is used, the same effect can be obtained as long as the extract is oil compatible with the refrigerant such as ether oil instead of ester oil. Further, as the oil remaining in the existing piping used in the CFC or HCFC system, any refrigerating machine oil may be used as long as the oil is soluble in the CFC or HCFC system refrigerant instead of the mineral oil and has a density smaller than the liquid refrigerant, For example, the same effect can be obtained with HAB oil or the like.

Further, a valve for preventing backflow is disposed in the raffinate liquid storage container 29 so that the raffinate liquid storage container 29 is temporarily stopped.
It is possible to prevent the recovered mineral oil from flowing backward due to the stagnation of the refrigerant and the like, and from flowing again into the refrigerant circuit. Further, by incorporating an adsorbent for adsorbing mineral oil in the raffinate liquid storage container 29, the mineral oil once recovered in the raffinate liquid storage container 29 can be re-flowed into the refrigerant circuit with a simple configuration and at low cost. Can be prevented.

FIG. 7 shows an extraction / separation mechanism for separating mineral oil with higher precision. In FIG. 7, the subscripts a and b indicate that there are two extraction / separation mechanisms, and the structure is such that the raffinate outflow pipe 4a and the extract inflow pipe 2b are connected. However, in the following description, the subscripts a and b may be omitted. In FIG. 7, reference numeral 1 denotes an extraction container, and the extraction container 1 is connected to a flow-in inlet pipe 2, an extractant inflow pipe 3, and a raffinate outflow pipe 4. In addition, from the viewpoint of mixing a low-density extract and a high-density extractant, the positions where these pipes are connected are: It is desirable that the extraction material 1 is connected to the extraction container 1 in the order of 2 so that the extract that rises in the extraction container 1 by buoyancy and the extractant that descends in the extraction container 1 are appropriately mixed. Reference numeral 6 denotes a liquid level generating vessel, and the extraction vessel 1 and the liquid level generating vessel 6 are connected by an upper connecting pipe 8 and a lower connecting pipe 9. The outflow pipe 7 is connected to the liquid level generating container 6 at a position slightly lower than the raffinate outflow pipe 4. At this time, the difference between the height of the outflow pipe 7 and the height of the raffinate outflow pipe 4 in the vertical direction is determined by the thickness of the raffinate forming a phase above the liquid surface in the extraction vessel 1.

The operation of the extraction / separation mechanism having such a configuration will be described. When the liquid refrigerant flows into the extraction containers 1a and 1b from the extractant inflow pipes 3a and 3b, respectively, the extraction container 1a and the liquid surface generation container 6a, and the extraction container 1b and the liquid surface generation container 6b
Respectively rise at the same height. Liquid level generating container 6
When the liquid levels in the a and 6b reach the positions of the outflow pipes 7a and 7b, respectively, the liquid refrigerant flows out of the outflow pipes 7a and 7b, respectively. It becomes constant at the positions of the outflow pipes 7a and 7b. Since the raffinate outflow pipes 4a and 4b are located higher than the outflow pipes 7a and 7b, the liquid refrigerant does not flow out of the raffinate outflow pipes 4a and 4b. Here, from the lottery inflow pipe 2a,
When the mixed oil of the ester oil and the mineral oil flows into the extraction vessel 1a, the ester oil is extracted into the liquid refrigerant, and the oil rich in the mineral oil is separated into two phases. , Flows into the extraction container 1b via the extraction inlet pipe 2b. The mineral oil-rich oil that has flowed into the extraction container 1b comes into contact with the liquid refrigerant in the extraction container 1b, and the ester oil is extracted again. Further, the mineral oil-rich oil is separated into two phases in the extraction container 1b. It flows out from the residual liquid outflow pipe 4b.

The operation of separating and extracting mineral oil by the extraction and separation mechanism in FIG. 7 will be described with reference to FIG. In FIG. 8, C is mineral oil 1
00%, B is the point of 100% refrigerant, F is the composition of the extract, S is the composition of the extractant, and $ 1 is the extract of the composition of F and S
When the extractant of the composition of is mixed in a certain ratio, and
This is the composition assuming that two-phase separation does not occur. # 1 separates into an upper composition R1 and a lower composition E1. When the upper phase of the composition R1 is separated as a raffinate and the extractant S is mixed again,
It is separated into an upper composition R2 and a lower composition E2. Since the ratio of the mineral oil in the composition R2 is smaller than that in the composition R1, the accuracy of the extraction and separation mechanism for separating the mineral oil can be improved. Similarly, when three or more extraction separation mechanisms are connected, higher mineral oil separation performance can be obtained.

FIG. 9 shows another example of the refrigerant circuit of the refrigeration cycle equipped with the extraction / separation mechanism according to Embodiment 1 of the present invention. In FIG. 9, reference numeral 53 denotes an oil separator inserted between the discharge side of the compressor 23 and the four-way valve 24. . 72 is a pipe (refrigerant circuit),
From the outlet side of the oil separator 53, the valve 31, the refrigerant heat exchanger 28,
It is connected to the refrigerant inflow pipe 22 via the expansion device 58. The other parts are the same as those in FIG. In this refrigerant circuit, the liquid refrigerant flowing into the inflow pipe 22 is, as shown in FIG. The refrigerant flowing through the refrigerant circuit 72 is condensed and liquefied by the heat exchanger 28, the liquefied refrigerant is throttled by the expansion device 58, and then guided into the extraction container 1 through the inflow pipe 22. A similar effect can be obtained by such a configuration.

The concept of the present invention described above can be summarized as follows. The extraction / separation mechanism of the present invention mixes the extract and the extractant in which the extract and the raw solvent are mixed, and the extractant at a ratio of two-phase separation, and extracts the extract in the extract into the extractant,
By utilizing the difference between the density of the raffinate and the density of the extract, only the raffinate is separated. Here, as a specific example, the extract corresponds to a mixture of a mineral oil or a hard alkylbenzene oil as a raw solvent and an ester oil or an ether oil as an extract. In addition, a hydrofluorocarbon-based refrigerant corresponds to the extractant. As the raffinate, an oil rich in a mineral oil or a hard alkylbenzene oil as a raw solvent after extraction of an extractable ester oil or ether oil is applicable.

The extraction and separation mechanism shown in FIG. 2 can be summarized as follows. That is, this extraction and separation mechanism connects the liquid level generating vessel 6 and the extraction vessel 1 with the upper connecting pipe 8 and the lower connecting pipe 9, and the extraction material inflow pipe 2 and the extractant inflow pipe connected to the extraction vessel 1. 3. An extraction pipe having a raffinate outflow pipe 4 and an outflow pipe (7) connected to the liquid level generating vessel 6 so that the density of the raffinate is lower than the density of the extract. The lower part of the connection port of the raffinate outflow pipe 4 connected to the extraction container 1 is positioned higher than the liquid surface position generated in the inside 6.

The heat source unit of the refrigeration cycle apparatus shown in FIG. 1 can be summarized as follows. That is, this heat source device includes a compressor 23, a heat source side heat exchanger 25, and an accumulator 26, and a pipe between the heat source side heat exchanger 25 and the liquid pipe 38 and the inflow pipe 22 (of the extraction / separation mechanism in FIG. 2). A pipe connecting the lower part of the accumulator 26 and the extract inlet pipe 2, a pipe branching the suction pipe of the compressor 23 and connecting to the outlet pipe 7, It has a raffinate storage container 29 that is connected to the raffinate outflow pipe 4 and stores the raffinate.

The heat source unit of the refrigeration cycle apparatus shown in FIG. 9 can be summarized as follows. That is, the heat source unit includes the compressor 23, the heat source side heat exchanger 25, the accumulator 26, and the oil separator 5 connected to the discharge side of the compressor 23.
3, a pipe 72 connecting the downstream of the oil separator 53 and the inflow pipe 22 (corresponding to the extractant inflow pipe 3 of the extraction / separation mechanism in FIG. 2), a lower part of the accumulator 26, and the extract feed pipe 2
, A pipe that branches the suction pipe of the compressor 23 and connects to the outflow pipe 7, and a raffinate storage container 29 that is connected to the raffinate outflow pipe 4 and stores the raffinate. It is.

Embodiment 2 FIG. 10 is a schematic diagram of a configuration of an extraction / separation mechanism according to Embodiment 2 of the present invention. FIG.
In 0, 10 is a shell, 11, 12, and 13 are partition plates, 14
Is a hole formed in the partition plate 11, and 15 is a hole formed in the partition plate 13. The hole 14 is located at a position slightly lower than the hole 15. Reference numerals 16 and 17 denote holes formed in the upper and lower portions of the partition plate 12, respectively. Reference numeral 2 denotes a lotion inflow pipe, and the lotion inflow pipe 2 is connected at one end to a space 43 partitioned by the partition plate 12 and the partition plate 13 in the shell 10. Reference numeral 3 denotes an extractant inflow pipe, and the extractant inflow pipe 3 is a partition plate 12
And one end is opened in a space 43 partitioned by the partition plate 13. Further, reference numeral 5 denotes an extract outflow pipe, and the extract outflow pipe 5 includes a partition plate 12 and a partition plate 13 in the shell 10.
One end is opened and connected to a lower portion, such as near the bottom, in the space 43 partitioned by. The extraction liquid outflow pipe 5 is provided in a space 4 partitioned by a partition plate 11 and a partition plate 12 in the shell 10.
One end may be opened and connected to the lower part of 2.

The operation of the extraction / separation mechanism having such a configuration will be described. When the refrigerant liquid flows from the extractant inflow pipe 3, the liquid levels of the space 42 and the space 43 both rise to the position of the hole 14. When the liquid level becomes equal to or larger than the hole 14, the liquid refrigerant flows out of the hole 14 toward the space 41, and the liquid surfaces of the space 42 and the space 43
It is kept in position 4. Here, when a mixed oil of ester oil and mineral oil flows in from the extract inlet pipe 2, the ester oil is extracted into the refrigerant liquid in the space 43, the mineral oil is separated, and the space is determined by the density difference between the mineral oil and the refrigerant liquid. A liquid phase rich in mineral oil is formed above the liquid surface of 43. When the mineral oil-rich oil phase becomes thicker, the liquid level of the space 43 becomes higher than the liquid level of the space 42, and the mineral oil flows into the space 44 from the hole 15. When the amount of the mineral oil flowing into the space 43 decreases, the thickness of the phase of the mineral oil formed in the space 43 decreases, and the liquid level does not reach the position of the hole 15.
No liquid refrigerant flows into 4. Therefore, it can be manufactured at low cost by integrating a container for storing the extracted and separated mineral oil from the mixed oil of the ester oil and the mineral oil with the extraction and separation mechanism.

When the extraction / separation mechanism of FIG. 10 is applied to the refrigerant circuit of FIG. 1, the extraction liquid outflow pipe 5 of FIG.
It is connected to the position of the outflow pipe 7 in FIG. In FIG. 10, since the raffinate is stored inside, the raffinate outflow pipe 4 shown in FIG.
There is no equivalent to outside. Therefore, there is no need to connect.

The extraction and separation mechanism shown in FIG. 10 can be summarized as follows. In other words, the extraction and separation mechanism is configured such that the space 42 (corresponding to a liquid surface generation container) in the shell 10 and the space 4
3 (corresponding to an extraction vessel) is connected by an upper hole 16 (corresponding to an upper connecting pipe) and a lower hole 17 (corresponding to a lower connecting pipe). Piping 3
And a hole 15 (corresponding to the raffinate outflow pipe), and a hole 14 (corresponding to the outflow pipe) in the space 42, and the density of the raffinate is smaller than the density of the extract. From the position of the liquid surface generated in the space 42, the hole 1 in the space 43
5 is positioned higher.

Embodiment 3 FIG. FIG. 11 is a schematic diagram of a configuration of an extraction / separation mechanism according to Embodiment 3 of the present invention. FIG.
In 1, 20 is an outer cylindrical container, 21 is an inner cylindrical container, and the outer cylindrical container 20 encloses the inner cylindrical container 21.
A space 4 is provided between the outer cylindrical container 20 and the inner cylindrical container 21.
3. A space 42 is formed inside the inner cylindrical container 21. Holes 16 and 17 are formed in the upper and lower portions of the inner cylindrical container 21. The space 43 is connected to the extract inlet pipe 2, the extractant inlet pipe 3, and the raffinate outlet pipe 4. The outflow pipe 7 is inserted into the space 42,
The end of the outflow pipe 7 in the inside 2 is the raffinate outflow pipe 4
A slightly lower position.

The operation of the extraction / separation mechanism having such a configuration will be described. When the refrigerant liquid enters the space 43 from the extractant inflow pipe 3, the refrigerant liquid also flows through the hole 17 to the space 42, and the space 4
2 and the height of the liquid surface of the space 43 become the same and rise. When the liquid level rises above the end of the outflow pipe 7 in the space 42, the liquid refrigerant flows into the outflow pipe 7, and the liquid level is maintained at the position of the end of the outflow pipe 7. At this time, space 43
The liquid level is maintained at the same position in
The liquid refrigerant does not flow out of the apparatus. Next, when the mixed oil of the ester oil and the mineral oil flows in from the extract inlet pipe 2, the ester oil is extracted into the refrigerant liquid, the mineral oil is separated, and the density difference between the mineral oil and the refrigerant liquid causes the upper part of the liquid level of the space 43 to rise. Form a liquid phase rich in mineral oil. When the phase of the mineral oil becomes thicker, the level of the liquid in the space 43 becomes higher than the level of the liquid in the space 42, and the oil rich in the mineral oil flows out from the raffinate outflow pipe 4. Therefore,
By making the extraction / separation mechanism a double cylindrical structure, it can be manufactured inexpensively and compactly. The extraction and separation mechanism shown in FIG. 11 can be applied to the refrigerant circuit shown in FIG.

The structure of the extraction and separation mechanism shown in FIG. 11 can be summarized as follows. In other words, this extraction and separation mechanism includes a space 42 (corresponding to a liquid level generating container) in the inner cylindrical container 21 and a space 43 (corresponding to the extraction container) formed by the inner cylindrical container 21 and the outer cylindrical container 20. Are connected by an upper hole 16 (corresponding to an upper connecting pipe) and a lower hole 17 (corresponding to a lower connecting pipe), and the extract inflow pipe 2, the extractant inflow pipe 3 and the raffinate outflow connected to the space 43. And a space 4
In the extraction / separation mechanism in which the density of the raffinate is lower than the density of the extract, the outflow pipe 7 in the space 43 is positioned higher than the liquid surface position generated in the space 42. It is something.

Embodiment 4 FIG. FIG. 12 is a schematic diagram of a configuration of an extraction / separation mechanism according to Embodiment 4 of the present invention. FIG.
In 2, reference numeral 1 denotes an extraction container, and a raffinate outflow pipe, an extractant inflow pipe 3, an extract inflow pipe 2, and an extract outflow pipe 7 are sequentially connected to the extraction vessel 1 from above. Further, an electromagnetic valve 96 is provided in the extraction liquid outflow pipe 7. further,
The first pressure sensor 9 is contained in the gas above the extraction vessel 1.
8. A second pressure sensor 99 is installed in the liquid at the bottom of the extract, and an electromagnetic valve 96 is opened and closed via a controller 97 based on the detection values of the first pressure sensor 98 and the second pressure sensor 99. Is done. The operation will be described. In the extraction container 1,
The extractant flows in from the extractant inflow pipe 3, the extractant flows in from the extractant inflow pipe 2, the extractant and the extractor mix in the extraction container 1,
Separate into raffinate and extract. Here, by controlling the opening and closing operation of the electromagnetic valve 96 so that the difference between the detections of the first pressure sensor 98 and the second pressure sensor 99 is constant, the amount of the light-residue raffinate increases. Thus, the height of the interface between the raffinate and the gas portion in the extraction vessel 1 can be made higher than the liquid level when only the extract is present. Therefore,
By connecting the raffinate outflow pipe 4 to the extraction vessel 1 at a position higher than the liquid level when only the extract is present, only the raffinate can flow out of the raffinate outflow pipe 4. . When the extraction / separation mechanism of FIG. 12 is applied to the refrigerant circuit of FIG. 1 or FIG.
Is connected to the outflow pipe 7 in FIG. 1 or FIG.

The structure of the extraction and separation mechanism shown in FIG. 12 can be summarized as follows. That is, in the extraction / separation mechanism in which the density of the raffinate is smaller than the density of the extract, the extraction vessel 1, the extract inlet pipe 2, the extractant inflow pipe 3, the extract outflow pipe 5 connected to the extraction vessel 1, A control mechanism for providing a constant pressure difference between the liquid level of the raffinate in the extraction vessel 1 and the bottom surface of the extraction vessel 1; The lower part of the connection port of the raffinate outflow pipe 4 is positioned higher than the liquid level when only the agent is present.

Embodiment 5 FIG. FIG. 13 shows a refrigerant circuit of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 5 of the present invention. In FIG. 13, 23 is a compressor, 24 is a four-way valve, 25 is a heat source side heat exchanger, and 26 is an accumulator. Reference numeral 1 denotes an extraction container, and the extraction container 1 is connected to the accumulator 26 via the inflow pipe 2 and the valve 59, and is connected to the extraction vessel 29 through the outflow pipe 4. . Reference numeral 6 denotes a liquid level generating vessel, and the extraction vessel 1 and the liquid level generating vessel 6 are connected by an upper connecting pipe 8 and a lower connecting pipe 9. One end of the outflow pipe 7 is connected to the liquid level generating container 6, and the other end is connected to the suction pipe 30 a of the compressor 23 via the refrigerant heat exchanger 28 and the valve 32. Further, the inflow pipe 22 is connected to the heat source side heat exchanger 25 and the liquid pipe 3 through the valve 31.
8 is connected. Extract liquid outflow pipe 5 is outflow pipe 7
And a refrigerant heat exchanger 28. The outdoor unit 51 is formed by the above configuration. Further, reference numeral 39 denotes a load-side heat exchanger, and reference numeral 40 denotes a throttle device, which forms an indoor unit 52. The outdoor unit 51 and the indoor unit 52 are
And a gas pipe 37. In FIG. 13, the subscripts a and b indicate that the system is a multi-type refrigeration / air-conditioning system having a plurality of indoor units, but the subscripts may be omitted in the description for simplicity.

When the refrigeration / air-conditioning apparatus having the above configuration is installed, the liquid and gas pipes or the liquid and gas pipes and the indoor unit used in the unit filled with the HCFC or CFC refrigerant are used. If an outdoor unit that uses HFC-based refrigerant and ester oil as refrigerating machine oil is newly installed, the liquid and gas pipes and indoor unit will be HCFC-based or C-type.
Mineral oil used as FC refrigerating machine oil remains. The operation when the refrigeration cycle performs the cooling operation in such a state will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 23 radiates heat in the heat source side heat exchanger and is condensed.
The liquid oil is liquefied and flows through the liquid pipe 38, and the mineral oil in the liquid pipe 38 is washed while dragging the mineral oil remaining in the liquid pipe 38 by an interfacial shear force generated between the liquid or gas and the mineral oil. The liquid refrigerant flowing through the liquid pipe 38 enters the indoor unit 52, evaporates and evaporates, flows through the gas pipe 37, and removes the mineral oil remaining in the gas pipe.
The mineral oil in the gas pipe is washed while being dragged by the shear force generated between the gas refrigerant and the mineral oil. The gas refrigerant flowing through the gas pipe 37 returns to the outdoor unit 51, and returns to the compressor 23 via the four-way valve 24 and the accumulator 26. At this time, the ester oil taken out of the compressor circulates in the existing refrigerant pipe together with the refrigerant, mixes with the mineral oil remaining in the existing pipe, and enters the accumulator 26 with the refrigerant.

FIG. 14 is a schematic diagram of the configuration of an extraction / separation mechanism according to Embodiment 5 of the present invention, which is applicable to the refrigeration cycle apparatus of FIG. In FIG. 14, reference numeral 1 denotes an extraction vessel, to which a lottery inflow pipe 2, a raffinate outflow pipe 4, and an extract outflow pipe 5 are connected. Reference numeral 6 denotes a liquid level generating vessel, and the extraction vessel 1 and the liquid level generating vessel 6 are connected by an upper connecting pipe 8 and a lower connecting pipe 9. Further, an inflow pipe 22 and an outflow pipe 7 are connected to the liquid level generating container 6. Here, the connection position between the outflow pipe 7 and the liquid level generating container 6 is slightly lower in the vertical direction than the raffinate liquid outflow pipe 4.

The operation of the extraction / separation mechanism having such a configuration will be described. When the gas-liquid two-phase refrigerant flows into the liquid level generating container 6 from the inflow pipe 22 and flows out from the outflow pipe 7, a liquid level is generated at the position of the outflow pipe 7. Further, since the liquid level generating vessel 6 and the extraction vessel 1 are connected by the upper communication pipe 8 and the lower communication pipe 9, the pressure is equalized and a liquid level is generated in the extraction vessel 1 at the same position as the outflow pipe 7. . Here, when a mixed oil of ester oil and mineral oil flows into the extraction fluid inflow pipe 2, the ester oil is extracted into the refrigerant liquid, and the mineral oil is separated. Forms a liquid phase rich in mineral oil. When the phase of the mineral oil becomes thicker, the liquid level of the extraction vessel 1 becomes higher than the liquid level of the liquid level generating vessel 6, and the mineral oil flows out from the raffinate outflow pipe 4.

FIG. 15 is a schematic diagram of a modification of the configuration of the extraction / separation mechanism according to the fifth embodiment of the present invention. As shown in FIG. 15, in the extraction vessel 1, the horizontal cross-sectional area in the vicinity of the connection portion of the raffinate outflow pipe 4 is set to be different from that of the other portions, particularly, the horizontal direction of the portion lower than the vicinity of the connection portion of the raffinate outflow pipe 4. By making the cross-sectional area smaller than the above, even if the separated mineral oil is small, the height of the separated mineral oil phase can be increased, so that even a small amount of mineral oil can be separated.

FIG. 16 shows another example of a refrigerant circuit of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 5 of the present invention. In FIG. 16, 23 is a compressor, 53 is an oil separator, 24 is a four-way valve, 25 is a heat source side heat exchanger, and 26 is an accumulator. Reference numeral 1 denotes an extraction container.
Is connected to the oil return circuit 35 via the extraction inflow pipe 2 and the valve 34.
Is connected to the raffinate storage container 29 via the raffinate outflow pipe 4. 6 is a liquid level generating container,
The extraction vessel 1 and the liquid level generating vessel 6 are connected by an upper connecting pipe 8 and a lower connecting pipe 9. One end of the outflow pipe 7 is connected to the liquid level generating container 6, and the other end is connected to the suction pipe 30 a of the compressor 23 via the refrigerant heat exchanger 28 and the valve 32. Further, the inflow pipe 22 is connected to the heat source side heat exchanger 25 through the valve 31.
And the liquid pipe 38. Extract liquid outflow pipe 5
It is connected to a pipe between the outflow pipe 7 and the refrigerant heat exchanger 28. The outdoor unit 51 is formed as described above. Further, reference numeral 39 denotes a load-side heat exchanger, and reference numeral 40 denotes a throttle device, which forms an indoor unit 52. The outdoor unit 51 and the indoor unit 52 are connected by a liquid pipe 38 and a gas pipe 37. In FIG. 16, the subscripts a and b indicate that the system is a multi-type refrigeration / air-conditioning system having a plurality of indoor units, but the description is omitted for simplification in the description.

When the refrigeration / air-conditioning apparatus having the above-described configuration is installed, the liquid and gas pipes or the liquid and gas pipes and the indoor unit used in the unit filled with the HCFC or CFC refrigerant are used. If an outdoor unit that uses HFC-based refrigerant and ester oil as refrigerating machine oil is newly installed, the liquid and gas pipes and indoor unit will be HCFC-based or C-type.
Mineral oil used as FC refrigerating machine oil remains. The operation when the refrigeration cycle performs the cooling operation in such a state will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 23 radiates heat in the heat source side heat exchanger and is condensed.
The liquid oil is liquefied and flows through the liquid pipe 38, and the mineral oil in the liquid pipe 38 is washed while dragging the mineral oil remaining in the liquid pipe 38 by an interfacial shear force generated between the liquid or gas and the mineral oil. The liquid refrigerant flowing through the liquid pipe 38 enters the indoor unit 52, evaporates and evaporates, flows through the gas pipe 37, and removes the mineral oil remaining in the gas pipe.
The mineral oil in the gas pipe is washed while being dragged by the shear force generated between the gas refrigerant and the mineral oil. The gas refrigerant flowing through the gas pipe 37 returns to the outdoor unit 51, and returns to the compressor 23 via the four-way valve 24 and the accumulator 26. At this time, the ester oil taken out of the compressor 23 circulates in the existing refrigerant pipe together with the refrigerant, mixes with the mineral oil remaining in the existing pipe, and enters the accumulator 26 together with the refrigerant.

When separating the recovered mineral oil from the existing pipe, the valves 31, 32 and 34 are opened, the high-pressure liquid refrigerant is throttled to a low-pressure two-phase refrigerant by the valve 31, and the liquid is supplied through the inflow pipe 22. It leads to the surface generation container 6. Further, from the oil return circuit 35, the mixed oil of the mineral oil and the ester oil collected from the existing pipe is throttled to a low pressure by the valve 34 and flows into the extraction container 1 via the extraction charge inflow pipe 2. In the extraction vessel 1, the ester oil is extracted into the refrigerant, and the mineral-rich oil, which is the raffinate liquid, forms an upper layer and separates into two phases. Raffinate storage container 2 via liquid outflow pipe 4
9 and stored. The liquid mixture of the refrigerant as the extract and the oil rich in ester oil flows out of the extract liquid outlet pipe 5 and joins with the gas-liquid two-phase refrigerant flowing out of the outlet pipe 7. Only the oil that is evaporated and vaporized and rich in ester oil flows into the suction pipe of the compressor 23.

Therefore, even under the condition that the flow rate of the refrigerant is small and the pressure difference in the refrigerant circuit is hard to be made, the pressure difference between the oil separator 53 and the extraction vessel 1 can be increased, and the flow of the oil to the extraction vessel 1 can be made smooth. Therefore, extraction and separation can be performed in a wide operating range of the refrigeration cycle.

The configuration of the heat source unit of the refrigeration cycle apparatus shown in FIG. 16 can be summarized as follows. That is, the heat source unit includes a compressor 23, an oil separator 53 connected to the discharge side of the compressor 23, a heat source side heat exchanger 25, and an accumulator 26.
14 and 15 in which the pipe between the inlet pipe and the inflow pipe (22) is connected, and an oil return circuit 35 for returning oil from the oil separator 53 to the accumulator 26 via the throttle mechanism 36. , The pipe connecting the oil return circuit 35 and connecting to the extract inflow pipe 2, the pipe connecting the suction pipe of the compressor 23 and connecting to the outlet pipe 7, and the suction pipe of the compressor 23 branching and extracting liquid It has a pipe connected to the pipe 5 and a raffinate storage container connected to the raffinate outflow pipe 4 for storing the raffinate.

Embodiment 6 FIG. FIG. 17 shows a refrigerant circuit of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 6 of the present invention. In FIG. 17, 23 is a compressor, 53 is an oil separator, 24 is a four-way valve, 25 is a heat source side heat exchanger, and 26 is an accumulator. The inside of the accumulator 26
The partition 83 separates the upper space 26a and the lower space 26b, and the upper space 26a and the lower space 26b are communicated by the refrigerant return pipe 75. 73 is a ventilation pipe with both ends open, and the ventilation pipe 73 has one end above the upper space 26a,
It is installed so that the other end is located at the bottom of the upper space 26a. Further, the ventilation pipe 73 and the refrigerant return pipe 75 are connected to the partition plate 83.
Are communicated by the communication pipe 74 at respective intermediate positions having the same vertical distance from. 76 is a demister for gas-liquid separation, 84 is a U-shaped tube having one end opened to the upper part of the lower space 26b and the other end opened to the outside of the accumulator 26, and the lowermost end of the U-shape is at the bottom of the lower space 26b. It is installed to come to the position. An oil return hole 77 is formed near the lowermost end of the U-shaped tube. Reference numeral 29 denotes a raffinate storage container, which communicates with the upper space 26a via the raffinate outflow pipe 4 and the check valve 80. The raffinate outflow pipe 4 is a communication pipe 7
It is desirable to connect to a position higher than the sum of the radii of the respective pipes. The upper portion of the raffinate storage container 29 is connected to a U-shaped pipe outlet via a back pressure pipe 85 and a throttle 79.

When the refrigeration / air-conditioning apparatus having the above configuration is installed, the liquid pipe and the gas pipe, or the liquid pipe / gas pipe and the indoor unit used in the unit filled with the HCFC or CFC refrigerant are used. If an outdoor unit is newly installed using HFC refrigerant as refrigerant and ester oil as refrigeration oil, mineral oil used as HCFC or CFC refrigeration oil will remain in the liquid and gas pipes and indoor unit. are doing. The operation when the refrigeration cycle performs the cooling operation in such a state will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 23 is separated from the spray of the ester oil contained in the gas refrigerant by the oil separator 53, and the heat source side heat exchanger 2
The heat is radiated at 5, condensed and liquefied, and flows through the liquid pipe 38. Liquid tube 3
The liquid refrigerant flowing through the pipe 8 cleans the mineral oil in the liquid pipe while dragging the mineral oil remaining in the liquid pipe 38 by the interface shear force generated between the liquid refrigerant and the mineral oil. The liquid refrigerant that has flowed through the liquid pipe 38 enters the indoor unit 52, evaporates and evaporates, flows through the gas pipe 37, and drags the mineral oil remaining in the gas pipe by the shear force generated between the gas refrigerant and the mineral oil. We wash mineral oil in. The gas refrigerant flowing through the gas pipe 37 is supplied to the outdoor unit 5.
1, and returns to the compressor 23 via the four-way valve 24 and the accumulator 26.

Here, the operation of separating the mineral oil inside the accumulator 26 will be described. When the mineral oil remaining in the existing piping is mixed with the ester oil inside the compressor 23,
The mixed oil of the ester oil and the mineral oil separated by the oil separator 53 flows into the mixing pipe (suction pipe) 45 of the accumulator 26 via the oil return pipe 35 and the throttle 36, and mixes with the mineral oil recovered from the existing pipe. . Further, the liquid refrigerant condensed in the heat source side heat exchanger 25 is throttled down to a low pressure by the throttle 78 and flows into the mixing pipe (suction pipe) 45 of the accumulator 26, and is mixed with the mixed oil of the ester oil and the mineral oil. The ester oil is extracted into the refrigerant liquid from the mixed oil and flows into the accumulator 26. The refrigerant liquid in which the refrigerant gas / ester oil has flowed into the accumulator 26 and the mineral oil in which the ester oil has slightly melted are separated into a gas refrigerant and a liquid by the demister 76 for gas-liquid separation and enter the upper space 26a.
The gas refrigerant in the upper space 26a flows into the lower space 26b through the refrigerant return pipe 75, flows through the U-shaped pipe 84, and
Return to The liquid separated by the gas-liquid separation demister 76 accumulates at the bottom of the upper space 26, and the mineral oil in which the ester oil is slightly dissolved becomes the upper phase, and the refrigerant liquid in which the ester oil is dissolved becomes the lower phase, and is separated into two phases. . The mineral oil of the upper phase, in which the ester oil is slightly dissolved, accumulates in the raffinate storage container 29 via the raffinate outflow pipe 4 and the check valve 80. On the other hand, the liquid refrigerant in which the ester oil, which forms the lower phase of the upper space 26a, is pushed by the pressure of the upper phase and rises in the ventilation pipe 73, and the communication pipe 74 and the refrigerant return pipe 75
And flows into the lower space 26b via the lower part, and accumulates at the bottom of the lower space 26b. The liquid refrigerant in which the ester oil has been collected at the bottom of the lower space 26b has an oil return hole 77 in an amount corresponding to the refrigerant flow rate.
Flows into the U-shaped tube 84 from the compressor 2 together with the refrigerant gas.
Flow into 3

Next, the operation when the heating operation is performed will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 23 flows through the gas pipe 37 and cleans the mineral oil in the gas pipe while dragging the mineral oil remaining in the gas pipe 37 by a shear force generated between the gas refrigerant and the mineral oil. I will do it. The gas refrigerant flowing through the gas pipe 37 radiates heat in the load-side heat exchanger 39, condenses and liquefies, and is throttled by the expansion device 40 to become a low-pressure two-phase refrigerant. The low-pressure two-phase refrigerant flows through the liquid pipe 38 and cleans the mineral oil in the liquid pipe 38 while dragging the mineral oil remaining in the liquid pipe 38 by the interfacial shear force generated between the liquid or gas and the mineral oil. The gas-liquid two-phase refrigerant flowing through the liquid pipe 38 enters the outdoor unit 51, evaporates in the heat source side heat exchanger 25, and returns to the compressor 23 via the four-way valve 24 and the accumulator 26. At this time, the ester oil taken out of the compressor 23 circulates in the existing refrigerant pipe together with the refrigerant, mixes with the mineral oil remaining in the existing pipe, and enters the accumulator 26 together with the refrigerant.
The accumulator 26 stores an amount of liquid refrigerant corresponding to the difference between the required amount of refrigerant for cooling and the amount of refrigerant for heating. Here, the operation of separating the mineral oil inside the accumulator 26 is the same as that during cooling.

Therefore, the mixed oil of the mineral oil and the ester oil and the refrigerant liquid are mixed efficiently in the mixing pipe (suction pipe) 45 of the accumulator 26, so that the extraction of the ester oil into the refrigerant liquid is ensured. It can be carried out. As a result, the mineral oil recovered from the existing pipe can be reliably separated, and the reliability of the refrigeration cycle can be improved.

FIG. 18 shows another example of a refrigerant circuit of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 6 of the present invention. FIG. 16 shows an example in which the accumulator 26 is divided into two upper and lower stages by the partition plate 83.
The same effect can be obtained in the example shown in FIG. That is,
The left and right spaces 9 are formed by the partition plate 83a and the partition plate 83b.
4a and 94b, and the partition plate 83a has an upper gap 9
3a and a lower gap 93b, and a partition plate 83b.
Is the height between the gap 93a and the gap 93b,
In the space 94a, the mineral oil in which the ester oil is slightly dissolved becomes the upper phase, and the refrigerant liquid in which the ester oil is dissolved becomes the lower phase, and is separated into two phases. The liquid refrigerant at the bottom of the space 94a passes through the gap 93b and accumulates between the partition plate 83a and the partition plate 83b.
As the amount of mineral oil in the inside increases, the height of the refrigerant liquid level between the partition plate 83a and the partition plate 83b also increases, and when the height reaches the upper end of the partition plate 83b, the refrigerant flows into the space 94b. Therefore, the mineral oil can be stored in the space 94a.

The structure of the extraction and separation mechanism shown in FIG. 17 can be summarized as follows. That is, the extraction and separation mechanism includes a vent pipe 73 having one end opened in the upper part of the extraction vessel 1 and the other end opened in the bottom of the extraction vessel 1, a vent pipe 73 having one end opened in the upper part of the extraction vessel 1 and the other end in the extraction vessel. 1 Liquid return pipe 7 opening outside
5, the ventilation pipe 73 and the liquid return pipe 75 are communicated by a communication pipe 74, the raffinate outflow pipe 4 is connected to the extraction vessel 1 at a position higher than the communication pipe 74, and the raffinate outflow pipe 4 is connected to the extraction pipe 4. In the extraction / separation mechanism in which the residual liquid storage container 29 is connected via a check valve 80, the extract and the extractant are mixed in the mixing pipe 45 and then guided into the extraction container 1.

The configuration of the heat source unit of the refrigeration cycle apparatus shown in FIG. 17 can be summarized as follows. That is, the heat source unit includes a compressor 23, an oil separator 53, a heat source side heat exchanger 25, an accumulator 26, and an oil return circuit 3 for returning oil from the oil separator 53 to the mixing pipe 45 via the throttle mechanism 36.
5, a pipe between the heat source side heat exchanger 25 and the liquid pipe 27 is branched and connected to a mixing pipe 45, an oil return circuit 35 is connected to the mixing pipe 45, and an outlet of the mixing pipe 45 is connected to an accumulator. 26 and the accumulator 2
6, a first space (upper space) 26a and a second space (lower space) 26b which are divided into upper and lower layers are provided,
A vent pipe 73 having one end opened at the top of the first space 26a and the other end opened at the bottom of the first space 26a;
A liquid return pipe 75 having one end opened to the upper part of 6a and the other end opened to the second space 26b communicates with the ventilation pipe 73 and the liquid return pipe 75 through a communication pipe 74 at a position higher than the communication pipe 74. The raffinate outflow pipe 4 is connected to the first space 26a, and the raffinate outflow pipe 4 and the raffinate storage container 29 are connected via a check valve 80.

The extraction / separation mechanism shown in FIG. 18 can be summarized as follows. That is, the extraction / separation mechanism connects the space 94a and the space 94b in the container 1 with the upper hole 93a and the lower hole 93b, and includes the mixing pipe 45 for the extract and the extractant connected to the space 94a. The space 94b is opened at an intermediate height, and the extraction liquid flows out from the space 94b to the outside in the extraction separation mechanism in which the density of the raffinate is smaller than the density of the extract.

Embodiment 7 FIG. 19 shows a refrigerant circuit of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 7 of the present invention. In FIG. 19, the same portions as those in the fifth embodiment are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 19, reference numeral 73 denotes a vent pipe, which projects upward into the upper space 26a and has one end opened, and the other end penetrates through the partition plate 83 and opens toward the lower space 26b. 75 is a refrigerant liquid return pipe,
One end is opened to the upper space 26a, and the other end is opened to the lower space 26b. Upper space 26 of refrigerant liquid return pipe 75
A float valve 81 having an intermediate density between the mineral oil and the refrigerant liquid is installed at the end on the a side, and moves up and down according to the amount of the refrigerant liquid in the upper space 26a.

Here, the operation of separating the mineral oil from the mixed oil of the mineral oil and the ester oil recovered from the existing pipe while performing the cooling or heating operation in the refrigerant circuit shown in FIG. 19 will be described. If the ester oil inside the compressor 23 is mixed with the mineral oil remaining in the existing piping, the oil separator 5
The mixed oil of ester oil and mineral oil separated in 3
5 flows into the mixing pipe (suction pipe) 45 of the accumulator 26 through the throttle 36 and mixes with the mineral oil recovered from the existing pipe. Further, the liquid refrigerant condensed in the heat source side heat exchanger is throttled down to a low pressure by the throttle 78, flows into the mixing pipe (suction pipe) 45 of the accumulator 26, mixes with the mixed oil of the ester oil and the mineral oil, and mixes the ester oil and the mineral oil. Ester oil is extracted into the refrigerant liquid from the mixed oil of
Flows into. The refrigerant gas flowing into the accumulator 26
The refrigerant liquid in which the ester oil is dissolved and the mineral oil are separated into a gas refrigerant and a liquid by the gas-liquid separation demister 76 and enter the upper space 26a. The gas refrigerant in the upper space 26a is
3, flows into the lower space 26 b, flows through the U-shaped tube 84, and returns to the compressor 23. The liquid separated by the gas-liquid separation demister 76 accumulates at the bottom of the upper space 26a, and a two-phase separation occurs in which the mineral oil in which the ester oil is slightly dissolved becomes the upper phase, and the refrigerant liquid in which the ester oil is dissolved becomes the lower phase. . Here, the float valve 8
Since the density of 1 is heavier than mineral oil and lighter than refrigerant liquid, it floats near the interface between the upper and lower phases. When the amount of the refrigerant liquid forming the lower phase increases, the float valve 81 rises in accordance with the height of the refrigerant liquid, opens the end of the refrigerant liquid return pipe 75, and opens the upper space 26.
The refrigerant liquid accumulated at the bottom of the flow path a flows into the lower space 26b. The liquid refrigerant in which the ester oil is collected at the bottom of the lower space 26b is supplied from the oil return hole 77 through the U-tube 8 by an amount corresponding to the refrigerant flow rate.
4 and flows into the compressor 23 together with the refrigerant gas.

Therefore, the interface between the mineral oil and the refrigerant liquid is controlled by the float valve 81, and the refrigerant liquid in which the ester oil is dissolved is transferred to the lower space 2.
Returning to the compressor via 6b, the head space 26a
Mineral oil can be stored in the pipe, the mineral oil recovered from the existing pipe can be separated and removed with a simple configuration, and the reliability of the refrigeration cycle can be improved.

FIG. 20 shows another example of a refrigerant circuit of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 7 of the present invention. The extraction / separation mechanism and the refrigerant circuit of FIG. 20 are different from those shown in FIG. The raffinate outflow pipe 4 and the raffinate storage container 29 are connected via a check valve 80.

FIG. 21 shows still another example of a refrigerant circuit of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 7 of the present invention. In the example of FIG. 18, the example in which the accumulator 26 is divided into upper and lower stages by the partition plate 83 is shown, but the same effect can be obtained in the example shown in FIG. 21. That is, the partition plate 83 is divided into left and right spaces 94a and 94b, and the partition plate 83 is provided with an upper gap 93. Space 9
The bottom of 4a and the bottom of space 94b are float-type on-off valves 92
And is connected by a pipe 93. By making the float 91 larger than the density of the mineral oil and lighter than the density of the refrigerant liquid, the float 91 floats near the interface between the mineral oil and the refrigerant liquid in the space 94a. Therefore, when the amount of the refrigerant liquid at the bottom of the space 94a increases, the float 91 rises and the float type on-off valve 92 opens, and the refrigerant liquid flows from the space 94a to the space 94b through the pipe 93, so that only the mineral oil is used. Can be stored in the space 94a.

The extraction / separation mechanism shown in FIG. 19 can be summarized as follows. That is, the extraction and separation mechanism includes a liquid return pipe 75 having one end opened at the bottom inside the extraction vessel 1 and the other end opened outside the extraction vessel 1, and a vent pipe communicating the upper part of the extraction vessel 1 with the outside of the vessel. A mixing pipe 45 for introducing the extract and the extractant into the extraction vessel 1 after mixing, and a float valve 81 having a density between the density of the raffinate and the density of the extract, and a liquid return pipe 7.
When the liquid level of the extract in the extraction container 1 becomes equal to or higher than a predetermined value, the float valve 81 is opened to discharge only the extract to the outside of the extraction container 1.

The extraction / separation mechanism shown in FIG. 21 can be summarized as follows. That is, the extraction and separation mechanism connects the space 94 a and the space 94 b in the container 1 with the upper hole 93, connects the lower parts of the container 94 with each other via the float-type on-off valve 92, and opens and closes the on-off valve 92 with the float 91. Then, the extract is moved from the space 94a to the space 94b.

Embodiment 8 FIG. FIG. 22 shows a refrigerant circuit of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 8 of the present invention. In FIG. 22, the same portions as those in the fifth embodiment are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 22, reference numeral 73 denotes a ventilation tube which projects upward into the upper space 26a and has one end opened, and the other end penetrates through the partition plate 83 and opens toward the lower space 26b. 87 is a refrigerant liquid suction pipe, 96 is an electromagnetic valve, and one end of the refrigerant liquid suction pipe 87 is connected to the upper space 26a.
And the other end is connected to the U through a solenoid valve 96.
It is connected to the outlet of the tube 84.

Here, the operation of separating the mineral oil from the mixed oil of the mineral oil and the ester oil recovered from the existing pipe while performing the cooling or heating operation in the apparatus shown in FIG. 22 will be described.
When the mineral oil remaining in the existing pipe is mixed with the ester oil inside the compressor 23, the mixed oil of the ester oil and the mineral oil separated by the oil separator 53 is supplied to the accumulator 26 through the oil return pipe 35 and the throttle 36. Flows into the mixing pipe (suction pipe) 45 of the above, and mixes with the mineral oil recovered from the existing pipe. Further, the liquid refrigerant condensed in the heat source side heat exchanger 25 is throttled down to a low pressure by the throttle 78, flows into the mixing pipe (suction pipe) 45 of the accumulator 26, mixes with the mixed oil of the ester oil and the mineral oil, and mixes with the ester oil. The ester oil is extracted from the mixed oil of the mineral oil into the refrigerant liquid and flows into the accumulator 26. The refrigerant liquid and the mineral oil in which the refrigerant gas / ester oil has flowed into the accumulator 26 are separated into gas refrigerant and liquid by the gas-liquid separation demister 76 and enter the upper space 26a.
The gas refrigerant in the upper space 26a flows into the lower space 26b through the ventilation pipe 73, flows through the U-shaped pipe 84, and
Return to The liquid separated by the gas-liquid separation demister 76 accumulates at the bottom of the upper space 26a, and a two-phase separation occurs in which the mineral oil in which the ester oil is slightly dissolved becomes the upper phase, and the refrigerant liquid in which the ester oil is dissolved becomes the lower phase. . When the amount of the refrigerant liquid forming the lower phase increases, the interface sensor 82 detects an increase in the interface between the refrigerant liquid and the mineral oil, and opens the solenoid valve 96. When the solenoid valve 96 is opened, the refrigerant liquid accumulated at the bottom of the upper space 26a is discharged to the refrigerant liquid suction pipe 8
7 flows into the outlet of the U-tube through the solenoid valve 96. If the flow rate of the refrigerant liquid temporarily increases and the interface rises to the position of the interface sensor 88, the solenoid valve 89
Is opened, and the refrigerant liquid at the bottom of the upper space 26a flows through the pipe 90 into the lower space 26b.

Therefore, by accurately detecting the interface between the mineral oil and the ester oil, the separation accuracy of the mineral oil is improved, and even when the amount of the refrigerant liquid flowing into the accumulator temporarily increases, the refrigerant liquid is transferred to the lower space 26b. Since it can be stored properly, mineral oil can be stored reliably.

Here, as the interface sensor, a capacitance sensor, a sensor for detecting the absorbance of infrared rays or the like, a sensor for detecting a difference in refractive index of light, and the like are generally used.

The extraction and separation mechanism shown in FIG. 22 can be summarized as follows. That is, this extraction separation mechanism is provided with a vent pipe 7 that communicates the upper part of the extraction container 1 with the space outside the container.
3, a refrigerant liquid suction pipe 87, a mixing pipe 45 for introducing the extract and the extractant into the extraction container 1 after mixing, an interface sensor 82 for detecting the movement of the interface between the raffinate and the extract, and an interface sensor. An electromagnetic valve 96 for sucking the extract from the refrigerant suction pipe 87 in accordance with the signal 82 is provided.

[0090]

According to the extraction / separation mechanism according to the present invention, as described in claim 1, the extract and the extractant in which the extract and the raw solvent are mixed are mixed at a ratio of two-phase separation, In the extraction and separation mechanism where the density of the raffinate is smaller than the density of the extract, a mechanism for separating only the raffinate is provided. Can be reliably separated.

According to the extraction / separation mechanism according to the present invention, as described in claims 2 and 3, an extraction container for extracting a predetermined component from an extract using an extractant, and a liquid level generating container having an extractant outlet pipe Are communicated with each other at the lower part and the upper part in the vertical direction, respectively, and the liquid surface formed by the raffinate outflow pipe is higher than the liquid level formed by the extractant outflow pipe and the raffinate outflow pipe. As a result, the position of the liquid level in the extraction container can be easily controlled, and the raffinate can be effectively separated.

According to the extraction / separation mechanism according to the present invention, as described in claim 4, the extraction container for extracting a predetermined component from the extract by the extractant, and the pressure difference between the bottom surface and the liquid level in the extraction container. Since the raffinate outflow pipe is arranged so that the liquid level formed by the raffinate outflow pipe is higher than the liquid level when there is only the extractant in the extraction container, Only the raffinate can be reliably separated.

According to the extraction / separation mechanism of the present invention, as described in claim 5, an extraction container for extracting a predetermined component from the extract by the extractant, an extractant inflow pipe and an extractant outflow pipe are provided. The liquid level generating container is communicated with each other at the lower part and the upper part in the vertical direction, and the extractant outflow pipe and the raffinate outflow pipe are formed by the raffinate outflow pipe rather than the liquid surface formed by the extractant outflow pipe. It was arranged so that the liquid level to be run was high.
That is, an inflow pipe for flowing the gas-liquid two-phase flow into the liquid level generating container and an outflow pipe for discharging the gas-liquid two-phase flow are provided, and a liquid surface is generated near a connection port between the outflow pipe and the liquid level generating container. As a result, the liquid level in the extraction container can be controlled with high precision, and thus the extraction liquid and the raffinate can be effectively separated.

According to the extraction / separation mechanism according to the present invention, as described in claim 6, in the extraction vessel, the horizontal cross-sectional area near the connection portion of the raffinate outflow pipe is smaller than that of the portion near the connection portion. Since the cross-sectional area is smaller than the horizontal cross-sectional area, the raffinate can be reliably separated even when the amount of the raffinate is small.

According to the extraction / separation mechanism according to the present invention, as described in claims 7 and 8, the mixing pipe for mixing the extract and the extractant is connected to the mixing pipe, and the raffinate liquid flows out to the upper part. Piping, an extraction vessel for connecting an extraction liquid outflow pipe to the lower part, and the liquid level of the raffinate in the extraction vessel to a position higher than the lower part of the connection port between the raffinate outflow pipe and the extraction vessel. Since the control means is provided, the extract and the extractant can be efficiently mixed, and the raffinate can be reliably separated.

According to the extraction / separation mechanism of the present invention, as described in the ninth aspect, a mixing pipe for mixing the extract and the extractant is connected to the mixing pipe, and a raffinate outflow pipe is provided on the upper part. An extraction vessel for connecting an extraction liquid outflow pipe at a lower portion, and means for controlling an interface height between the raffinate and the extraction liquid in the extraction vessel at a position higher than a connection between the extraction liquid outflow pipe and the extraction vessel are provided. Therefore, the raffinate can be reliably stored in the extraction container, and a separate container for storing the raffinate is not required, so that the apparatus can be manufactured at low cost.

According to the extraction / separation mechanism of the present invention, as described in claim 10, a mixing pipe for mixing the extract and the extractant is connected to the mixing pipe.
An extraction container for connecting the extraction liquid outflow pipe to the lower part, and controlling the liquid level of the raffinate in the extraction vessel to a position higher than the lower part of the connection port between the raffinate outflow pipe and the extraction vessel. Since the means for controlling the height of the interface between the extraction liquid and the extraction liquid at a position higher than the connection port between the extraction liquid outflow pipe and the extraction container is provided, it is possible to reliably store the extraction liquid in the extraction container. It is possible to stably control the raffinate liquid surface in the extraction container and the position of the interface between the raffinate liquid and the refrigerant liquid even when the amount of the extract liquid flowing into the extraction container temporarily increases.

According to the heat source unit of the refrigeration cycle apparatus according to the present invention, as described in claim 11, claims 1 to 4
The extraction / separation mechanism according to any of the above, the downstream of the heat source side heat exchanger and the extractant inflow pipe of the extraction / separation mechanism are connected, the lower part of the accumulator and the extractant inflow pipe are connected, and the compressor is sucked. Since the pipe and the extractant outflow pipe of the liquid level generator are connected, even if the mineral oil recovered from the existing pipe is mixed with refrigeration oil compatible with HFC refrigerant such as ester oil or ether oil, mineral oil can be separated and recovered. Can be.

According to the heat source unit of the refrigeration cycle apparatus according to the present invention, as described in claim 12, the oil separator connected to the discharge side of the compressor, and according to any one of claims 1 to 4, An extraction separation mechanism is provided, and the downstream of the oil separator and the extractant inflow pipe of the extraction and separation mechanism are connected via a throttle means, and the lower part of the accumulator and the extractant inflow pipe are connected,
Refrigerant that connects the suction pipe of the compressor and the extractant outflow pipe, and heat exchanges the pipe between the downstream of the oil separator and the throttle means, and the pipe between the suction pipe and the extractant outflow pipe of the compressor. Since the heat exchanger is provided, the mineral oil can be separated and recovered even when the refrigerating machine oil corresponding to the HFC-based refrigerant such as the ester oil or the ether oil is mixed with the mineral oil recovered from the existing pipe.

According to the heat source unit of the refrigeration cycle apparatus according to the present invention, as described in claim 13, the extraction / separation mechanism according to claim 5 or 6 is provided, and the extraction / separation mechanism is provided downstream of the heat source side heat exchanger. Connect the extractant inflow pipe of the mechanism, connect the lower part of the accumulator and the extractant inflow pipe, connect the suction pipe of the compressor and the extractant outflow pipe, and connect the suction pipe and the extract outflow pipe of the compressor. Is connected, the mineral oil can be separated and recovered even when the refrigerating machine oil corresponding to the HFC refrigerant such as the ester oil or the ether oil is mixed with the mineral oil recovered from the existing piping.

According to the heat source device of the refrigeration cycle apparatus according to the present invention, as described in claim 14, an oil separator connected to the discharge side of the compressor is included, and the extraction device according to claim 5 or 6 is provided. A separation mechanism is connected, the downstream of the heat source side heat exchanger is connected to the extraction agent inflow pipe of the extraction and separation mechanism, the oil return circuit of the oil separator is connected to the extraction material inflow pipe, and the suction pipe of the compressor is connected to the extraction pipe. Since the agent outflow pipe is connected and the suction pipe of the compressor and the extract outflow pipe are connected, it is possible to separate the mineral oil recovered from the existing pipe in any operating range.

According to the heat source unit of the refrigeration cycle apparatus according to the present invention, as described in claim 15, an oil separator connected to the discharge side of the compressor is provided. The extraction / separation mechanism described above is connected, the downstream of the heat source side heat exchanger is connected to the mixing pipe of the extraction / separation mechanism, the oil return circuit of the oil separator is connected to the mixing pipe, and the other end of the liquid return pipe is at a low pressure. After connecting the extract and the extractant with the mixing pipe in advance, the mixture is allowed to flow into the extraction container. As a result, extraction of the extract can be reliably performed, so that even in the case where the refrigerating machine oil compatible with the HFC-based refrigerant such as the ester oil or the ether oil is mixed with the mineral oil recovered from the existing piping in the refrigeration cycle, and , It is possible to reliably separate the mineral oil.

According to the heat source device of the refrigeration cycle apparatus according to the present invention, as described in claim 16, the oil separator connected to the discharge side of the compressor and the integrated accumulator according to claim 8 After connecting the downstream of the heat source side heat exchanger and the mixing pipe of the extraction / separation mechanism, connecting the oil return circuit of the oil separator and the mixing pipe, and mixing the extract and the extractant with the mixing pipe in advance Into the extraction vessel. Therefore, since the extraction container is built in the accumulator, even if the refrigerating cycle, when the refrigerating machine oil corresponding to the HFC-based refrigerant such as the ester oil or the ether oil is mixed with the mineral oil recovered from the existing piping, the mineral oil is efficiently separated at low cost. be able to.

According to the heat source device of the refrigeration cycle apparatus according to the present invention, as described in claim 17, the liquid in the raffinate storage container is prevented from flowing back to the outside into the raffinate storage container. The mechanism for preventing the mineral oil stored in the raffinate liquid storage container from flowing back into the refrigerant circuit is prevented.

According to the heat source device of the refrigeration cycle apparatus according to the present invention, as described in claim 18, the raffinate liquid storage container is provided with an adsorbent for adsorbing the raffinate liquid, so that the raffinate liquid is provided. Mineral oil stored in the storage container can be easily and reliably captured.

According to the heat source unit of the refrigeration cycle apparatus according to the present invention, as described in claim 19, a hydrofluorocarbon-based refrigerant is used as an extractant, and either an ester oil or an ether oil and a mineral oil or a hard alkylbenzene are used as an extractant. Since a mixed oil with any of the oils is used, the recovery efficiency of the ester oil can be increased, the lubricating oil of the compressor can be prevented from being depleted, and the reliability can be increased.

According to the heat source unit of the refrigeration cycle apparatus according to the present invention, as described in claim 20, the temperature in the extraction vessel is set to be equal to or lower than the low-pressure saturation temperature of the refrigeration cycle.
Mineral oil can be extracted more accurately.

According to the refrigeration cycle apparatus of the present invention,
As described in claim 21, since the use side machine including the use side heat exchanger and the heat source device according to any one of claims 11 to 20 are connected by a connection pipe to form a refrigerant circuit,
A refrigeration cycle device capable of separating the extract from the extract is obtained.

According to the refrigeration cycle apparatus of the present invention,
As described in claim 22, since the connection pipe of the existing refrigeration cycle apparatus is used as the connection pipe, an efficiently updated refrigeration cycle apparatus can be obtained.

According to the refrigeration cycle apparatus updating method of the present invention, as described in claim 23, the heat source unit of the existing refrigeration cycle unit is replaced with the heat source unit according to any one of claims 11 to 20. In addition, since the refrigerant is replaced, the renewal can be performed using a connection pipe or the like of the existing refrigeration cycle device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a refrigerant circuit diagram of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 1 of the present invention.

FIG. 2 is a schematic configuration diagram of an extraction / separation mechanism according to Embodiment 1 of the present invention.

FIG. 3 is a schematic diagram showing a liquid level in an extraction container and a liquid level generating container.

FIG. 4 is a diagram showing a change in the difference in liquid level between the extraction container and the liquid level generating container with respect to a change in the ratio of mineral oil in the extraction container.

FIG. 5 is a diagram showing a phase state of a liquid phase three-component system using triangular coordinates.

FIG. 6 is a diagram showing an equilibrium curve of a liquid phase ternary system.

FIG. 7 is another schematic configuration diagram of the extraction / separation mechanism according to the first embodiment of the present invention.

FIG. 8 is a diagram illustrating a phase state of a liquid three-component system using triangular coordinates in another example of the extraction and separation mechanism according to the first embodiment of the present invention.

FIG. 9 is a refrigerant circuit diagram illustrating another example of a refrigeration cycle equipped with the extraction / separation mechanism according to Embodiment 1 of the present invention.

FIG. 10 is a schematic configuration diagram of an extraction / separation mechanism according to Embodiment 2 of the present invention.

FIG. 11 is a schematic configuration diagram of an extraction / separation mechanism according to Embodiment 3 of the present invention.

FIG. 12 is a schematic configuration diagram of an extraction / separation mechanism according to Embodiment 4 of the present invention.

FIG. 13 is a diagram showing a refrigerant circuit diagram of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 5 of the present invention.

FIG. 14 is a schematic configuration diagram of an extraction / separation mechanism according to Embodiment 5 of the present invention.

FIG. 15 is another schematic configuration diagram of the extraction / separation mechanism according to the fifth embodiment of the present invention.

FIG. 16 is a diagram showing another example of a refrigerant circuit diagram of a refrigeration cycle equipped with the extraction / separation mechanism according to Embodiment 5 of the present invention.

FIG. 17 is a refrigerant circuit diagram illustrating another example of a refrigeration cycle equipped with the extraction / separation mechanism according to Embodiment 6 of the present invention.

FIG. 18 is a diagram showing a refrigerant circuit diagram of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 6 of the present invention.

FIG. 19 is a refrigerant circuit diagram showing another example of a refrigeration cycle equipped with the extraction / separation mechanism according to Embodiment 7 of the present invention.

FIG. 20 is a diagram showing a refrigerant circuit diagram of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 7 of the present invention.

FIG. 21 is a diagram showing a refrigerant circuit diagram of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 7 of the present invention.

FIG. 22 is a diagram showing a refrigerant circuit diagram of a refrigeration cycle equipped with an extraction / separation mechanism according to Embodiment 8 of the present invention.

FIG. 23 is a schematic configuration diagram of a conventional extraction / separation mechanism.

FIG. 24 is a schematic configuration diagram of another conventional extraction / separation mechanism.

[Explanation of symbols]

1 Extraction vessel, 2 Extraction inflow pipe, 3 Extractant inflow pipe, 4 Extraction residue outflow pipe, 5 Extraction outflow pipe,
6 Liquid level generating vessel, 7 Outflow pipe, 8 Upper connecting pipe, 9 Lower connecting pipe, 10 Shell, 11, 1
2,13 partition plate, 14,15,16,17 holes, 2
0 outer cylindrical container, 21 inner cylindrical container, 22 inflow piping, 23 compressor, 24 four-way valve, 25 heat source side heat exchanger, 26 accumulator, 26a upper space, 26b lower space, 27 liquid line piping, 2
8 Refrigerant heat exchanger, 29 Extraction liquid storage container, 30
Piping, 30a Suction piping, 31, 32 valve, 33
Piping, 34 valves, oil return circuit, 36 throttle device,
37 gas pipe, 38 liquid pipe, 39 load side heat exchanger, 40 throttle device, 41, 42, 43, 44 space, 45 mixing pipe (suction pipe), 51 outdoor unit,
52 indoor unit, 53 oil separator, 54 oil return hole,
55 foreign matter capturing means, 56, 57 operating valve, 58
Throttle device, 61 mechanical part, 62 auxiliary bearing, 63 oil supply device, 64 oil supply pipe, 65 float, 66 extraction port, 67 extraction pipe, 68 liquid refrigerant mainly composed of HFC, 69 spring, 70 sealed casing,
71 incompatible lubricating oil, 72 refrigerant circuit, 73
Ventilation pipe, 74 communication pipe, 75 refrigerant liquid return pipe, 7
6 demister for gas-liquid separation, 77 oil return hole, 78 throttle, 79 throttle, 80 check valve, 81 float valve, 82 interface sensor, 83 partition plate, 84 U
Pipe, 85 back pressure pipe, 86 piping, 87 refrigerant liquid suction pipe, 88 interface sensor, 89 solenoid valve, 90
Piping, 91 float, 92 float on-off valve,
93 piping, 94 space, 96 solenoid valve.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shiro Takatani 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Satoru Toyama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo 3 Rishi Electric Co., Ltd. (72) Inventor Shinichi Iwamoto 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Sanishi Electric Co., Ltd. Inside the corporation

Claims (23)

[Claims] 1. An extract in which an extract and a raw solvent are mixed and an extractant are mixed at a ratio of two-phase separation, and the extract in the extract is extracted into the extractant and the density of the raffinate is extracted. An extraction / separation mechanism comprising a mechanism for separating only raffinate liquid in an extraction / separation mechanism having a density lower than that of a liquid. 2. An extractant inflow pipe having a length in a vertical direction.
An extraction container for extracting a predetermined component from the extract by the extractant, comprising an extractor inflow pipe, the extractant inflow pipe, and a raffinate outflow pipe arranged at a position higher than the extractor inflow pipe; And a liquid level generating container having an extractant outflow pipe, respectively, are communicated with each other at a lower portion and an upper portion in the vertical direction, and the extractant outflow pipe and the raffinate outflow pipe are formed by the extractant outflow pipe. An extraction / separation mechanism, wherein a liquid level formed by the raffinate outflow pipe is higher than a liquid level to be extracted. 3. The extraction / separation mechanism according to claim 2, wherein the extract inflow pipe is disposed at a lower position than the extractant inflow pipe. 4. An extractant inflow pipe, an extractant inflow pipe, a raffinate outflow pipe arranged at a position higher than the extractant inflow pipe and the extractant inflow pipe, and having a length in a vertical direction. An extraction liquid outlet pipe disposed at a lower position than the extract input pipe, and an extraction container for extracting a predetermined component from the extract using an extractant; and a pressure difference between a bottom surface and a liquid level in the extraction container. And a control mechanism to perform, the raffinate outflow pipe is arranged so that the liquid level formed by the raffinate outflow pipe is higher than the liquid level when there is only the extractant in the extraction container. Characteristic extraction and separation mechanism. 5. A drainage inflow pipe having a length in the vertical direction, a raffinate liquid outflow pipe arranged at a higher position than the extractor inflow pipe, and a lower position than the extractant inflow pipe. And an extraction vessel for extracting a predetermined component from the extract with the extractant, and a liquid level generating container having a length in the vertical direction and comprising an extractant inflow pipe and an extractant outflow pipe. And
Communicate with each other at the bottom and top in the vertical direction,
The extraction method, wherein the extractant outflow pipe and the raffinate outflow pipe are arranged such that a liquid surface formed by the raffinate outflow pipe is higher than a liquid level formed by the extractant outflow pipe. Separation mechanism. 6. The extraction container, wherein a horizontal cross-sectional area in the vicinity of a connection portion of the raffinate outflow pipe is smaller than a horizontal cross-sectional area of a portion lower than in the vicinity of the connection portion. Item 6. The extraction separation mechanism according to any one of Items 2 to 5. 7. An extraction container for extracting a predetermined component from the extract with the extractant, a mixing pipe connected to the extraction container for mixing and flowing the extractant and the extract, and a check valve connected to the extraction container. A raffinate outflow pipe having, a vent pipe having one end opened at a lower part in the extraction container and another end opened at an upper part, and a liquid having one end opened at an upper part in the extraction container and another end opened outside the extraction container. An extraction / separation mechanism comprising: a return pipe; and a communication pipe that communicates an intermediate portion of the ventilation pipe and an intermediate portion of the liquid return pipe at a position lower than a connection portion of the raffinate outflow pipe. 8. An integrated extraction / separation mechanism wherein an accumulator and the extraction container according to claim 7 are integrally formed, and the other end of the liquid return pipe is opened inside the accumulator. 9. An extraction container for extracting a predetermined component from the extract using an extractant, a mixing pipe connected to the extraction container for mixing and flowing the extractant and the extract, and having one end opened at an upper part in the extraction container. A vent pipe having the other end opened to the outside of the extraction container;
A liquid return pipe having one end opened at a lower portion (bottom) inside the extraction container and the other end opened outside the extraction container, the liquid return having an intermediate density between the density of the raffinate and the density of the extract; An extraction separation mechanism comprising a float valve for opening and closing said one end of the tube. 10. A raffinate outflow pipe connected to the extraction vessel at a position higher than a liquid level of the extract controlled by the float valve, the check having a check valve. The extraction and separation mechanism according to claim 9. 11. A heat source unit of a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger and an accumulator, comprising: the extraction / separation mechanism according to claim 1; and a raffinate liquid storage container. A downstream of the heat source side heat exchanger is connected to an extractant inflow pipe of the extraction / separation mechanism, a lower portion of the accumulator is connected to the extractant inflow pipe, and a suction pipe of the compressor and the liquid level generator are connected. A heat source unit of a refrigeration cycle apparatus, wherein the extraction liquid outflow pipe is connected to the extraction liquid outflow pipe, and the extraction liquid outflow pipe is connected to the extraction liquid storage vessel. 12. The heat source device of a refrigeration cycle device including a compressor, a heat source side heat exchanger, an accumulator, and an oil separator connected to a discharge side of the compressor, according to claim 1, wherein An extraction / separation mechanism, and a raffinate liquid storage container; a downstream of the oil separator and an extraction / inflow pipe of the extraction / separation mechanism connected via a throttle unit; a lower part of the accumulator and the extraction inflow pipe And a connection between the suction pipe of the compressor and the extractant outflow pipe, and a pipe between the throttle means from downstream of the oil separator, and a suction pipe of the compressor and the extraction pipe. A heat source unit for a refrigeration cycle device, comprising: a refrigerant heat exchanger for exchanging heat between pipes between the agent outflow pipes, wherein the raffinate outflow pipe and the raffinate storage container are connected. 13. A heat source device of a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger and an accumulator, comprising: the extraction / separation mechanism according to claim 5 and a raffinate liquid storage container; The downstream of the heat exchanger is connected to the extractant inflow pipe of the extraction and separation mechanism, the lower part of the accumulator is connected to the extractant inflow pipe, and the suction pipe of the compressor is connected to the extractant outflow pipe. The suction source of the compressor and the extraction liquid outflow pipe are connected, and the raffinate outflow pipe and the raffinate storage container are connected to each other. 14. A heat source unit of a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger, an accumulator, and an oil separator connected to a discharge side of the compressor.
The extraction and separation mechanism, and a raffinate liquid storage container, comprising: a downstream of the heat source side heat exchanger and an extractant inflow pipe of the extraction and separation mechanism connected to the oil return circuit of the oil separator and The extractor inflow pipe is connected, the compressor suction pipe and the extractant outflow pipe are connected, the compressor suction pipe and the extract outflow pipe are connected, and the raffinate outflow pipe is connected. A heat source unit for a refrigeration cycle device, wherein the heat source unit is connected to a raffinate storage container. 15. The heat source device of a refrigeration cycle device including a compressor, a heat source side heat exchanger, an accumulator, and an oil separator connected to a discharge side of the compressor, wherein the heat source device according to any one of claims 7 to 10. An extraction / separation mechanism, and a raffinate storage container; connecting a downstream of the heat source side heat exchanger to a mixing pipe of the extraction / separation mechanism; and connecting an oil return circuit of the oil separator to the mixing pipe. The other end of the liquid return pipe is connected to a low pressure side pipe or device, and the raffinate outflow pipe and the raffinate storage container are connected to each other. 16. The raffinate liquid in a heat source unit of a refrigeration cycle apparatus including a compressor, a heat source side heat exchanger, the integrated accumulator according to claim 8, and an oil separator connected to a discharge side of the compressor. Comprising a storage container, connecting the downstream of the heat source side heat exchanger and the mixing pipe of the extraction and separation mechanism, connecting the oil return circuit of the oil separator and the mixing pipe, and A heat source unit for a refrigeration cycle device, wherein the heat source unit is connected to the raffinate storage container. 17. A mechanism according to claim 11, wherein the raffinate storage container is provided with a mechanism for preventing the liquid in the raffinate storage container from flowing back to the outside. Heat source equipment for refrigeration cycle equipment. 18. The heat source unit of a refrigeration cycle apparatus according to claim 11, wherein an adsorbent for adsorbing the raffinate or the raw solvent is provided inside the raffinate storage container. . 19. The method according to claim 11, wherein the extractant is a hydrofluorocarbon-based refrigerant, and the extractant is a mixed oil of either an ester oil or an ether oil and a mineral oil or a hard alkylbenzene oil. A heat source unit for a refrigeration cycle apparatus according to any one of the above. 20. The method according to claim 11, wherein the temperature in the extraction vessel is a low-pressure saturation temperature of a refrigeration cycle.
20. A heat source unit for a refrigeration cycle apparatus according to any one of claims to 19. 21. A refrigeration cycle comprising a refrigerant circuit formed by connecting a user-side machine including a user-side heat exchanger and the heat source device according to claim 11 by a connection pipe. apparatus. 22. The refrigeration cycle apparatus according to claim 21, wherein a connection pipe of an existing refrigeration cycle apparatus is used as the connection pipe. 23. A method of updating a refrigeration cycle device, comprising replacing a heat source device of an existing refrigeration cycle device with the heat source device according to claim 11 and replacing a refrigerant.