WO2023007620A1 - 冷媒貯留容器及びこの冷媒貯留容器を備えた冷凍サイクル装置 - Google Patents

冷媒貯留容器及びこの冷媒貯留容器を備えた冷凍サイクル装置 Download PDF

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Publication number
WO2023007620A1
WO2023007620A1 PCT/JP2021/027919 JP2021027919W WO2023007620A1 WO 2023007620 A1 WO2023007620 A1 WO 2023007620A1 JP 2021027919 W JP2021027919 W JP 2021027919W WO 2023007620 A1 WO2023007620 A1 WO 2023007620A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
container body
storage container
refrigerant storage
container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/027919
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English (en)
French (fr)
Japanese (ja)
Inventor
真哉 東井上
亮 築山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2021/027919 priority Critical patent/WO2023007620A1/ja
Priority to CN202180100642.7A priority patent/CN117677809A/zh
Priority to JP2023537820A priority patent/JPWO2023007620A1/ja
Priority to EP21951826.3A priority patent/EP4379291A1/en
Priority to US18/564,131 priority patent/US20240247846A1/en
Publication of WO2023007620A1 publication Critical patent/WO2023007620A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—Component parts or details not otherwise provided for in this subclass
    • F25B2400/23—Separators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size

Definitions

  • the present disclosure relates to a refrigerant storage container that stores refrigerant inside the container and a refrigeration cycle device that includes this refrigerant storage container.
  • a refrigeration cycle apparatus In a refrigeration cycle device, when the compressor sucks liquid refrigerant, the refrigerating machine oil in the compressor shell is diluted, causing seizure of the sliding parts of the compressor. Therefore, a refrigeration cycle apparatus is provided with a refrigerant storage container that separates the gas-liquid two-phase refrigerant into gas refrigerant and liquid refrigerant and stores the liquid refrigerant inside the container upstream of the suction port through which the compressor sucks the refrigerant.
  • Patent Literature 1 discloses a gas-liquid separator that is arranged in a refrigeration cycle and separates a refrigerant into a liquid refrigerant and a gas refrigerant.
  • This gas-liquid separator has the function of a refrigerant storage container, and is provided at the upper part of the container for the gas-phase refrigerant outflow pipe for causing the gas refrigerant to flow out from the gas-liquid separator, and at the lower part of the container.
  • a liquid-phase refrigerant outflow pipe for letting the liquid refrigerant flow out from the gas-liquid separator;
  • a first plate that separates the refrigerant inflow chamber and the liquid-phase refrigerant retention chamber; has a second plate that
  • the first plate separates the refrigerant inflow chamber and the liquid-phase refrigerant retention chamber, so that the retained liquid refrigerant is prevented from rolling up and entering the refrigerant inflow chamber. be.
  • the second plate separates the refrigerant inflow chamber and the vapor-phase refrigerant collecting chamber, the refrigerant that has flowed into the refrigerant inflow chamber is prevented from becoming droplets and entering the vapor-phase refrigerant collecting chamber.
  • the stagnant liquid refrigerant enters the refrigerant outflow pipe through which the gas refrigerant flows.
  • the amount of droplets that scatter increases in proportion to the area of the gas-liquid interface. For this reason, even when the liquid refrigerant storage amount is less than the maximum storage amount, the scattered liquid refrigerant may reach the refrigerant outflow pipe and flow out of the refrigerant storage container together with the gas refrigerant.
  • the present disclosure has been made against the background of the above problems, and provides a refrigerant storage container that suppresses the outflow of liquid refrigerant together with gas refrigerant from the refrigerant storage container, and a refrigeration cycle apparatus equipped with this refrigerant storage container. It is something to do.
  • a refrigerant storage container includes a container body that stores a refrigerant, an inflow pipe that is inserted into an upper space in the container body and has an inlet through which the refrigerant flows into the container body, and an outflow pipe inserted into the upper space and having an outflow port through which the refrigerant flows out of the container body; toward the bottom of the , the farther away from the outlet.
  • a refrigeration cycle apparatus includes the refrigerant storage container and a compressor connected to the refrigerant storage container through the outflow pipe.
  • the cross-sectional area of the internal space where the outflow port of the outflow pipe through which the refrigerant flows out from the gas-liquid storage container is located increases toward the bottom surface of the container body. . Since the outflow pipe is inserted into the upper space of the container body, the cross-sectional area of the internal space near the outflow port is smaller than the cross-sectional area of the internal space near the bottom of the container body. Therefore, even if the liquid refrigerant is stored up to the vicinity of the outlet, the area of the gas-liquid interface where waving occurs is small, so the amount of droplets that scatter can be suppressed. Therefore, droplets scattered from the gas-liquid interface are prevented from reaching the refrigerant outflow pipe and flowing into the compressor together with the gas refrigerant.
  • FIG. 1 is a refrigerant circuit diagram of a refrigeration cycle device having a refrigerant storage container according to Embodiment 1.
  • FIG. 1 is a front view showing a refrigerant storage container according to Embodiment 1;
  • FIG. 2 is a plan view showing a refrigerant storage container according to Embodiment 1;
  • 4 is a diagram showing the relationship between the height of the container body and the cross-sectional area of the refrigerant storage container according to Embodiment 1.
  • FIG. 4 is a diagram showing the relationship between the height of the container body and the volume inside the container body of the refrigerant storage container according to Embodiment 1.
  • FIG. FIG. 8 is a front view showing a refrigerant storage container according to Embodiment 2;
  • FIG. 7 is a sectional view showing the AA section of FIG. 6;
  • FIG. 11 is a front view showing a refrigerant storage container according to Embodiment 3;
  • FIG. 9 is a sectional view showing a BB section of FIG. 8;
  • FIG. 9 is a sectional view showing a CC section of FIG. 8;
  • a refrigerant storage container according to the present embodiment and a refrigeration cycle apparatus including this refrigerant storage container will be described below with reference to the drawings.
  • the present disclosure is not limited to the following embodiments, and various modifications can be made without departing from the gist of the present disclosure.
  • the present disclosure includes all combinations of configurations that can be combined among the configurations shown in the following embodiments.
  • the refrigerant storage container and the refrigeration cycle device shown in the drawings show an example of the configuration, and the configuration of the present disclosure is not limited by the refrigerant storage container and the refrigeration cycle device shown in the drawings.
  • terms representing directions for example, “up”, “down”, “right”, “left”, “front”, “back”, etc.) are used as appropriate for ease of understanding. They are intended to be illustrative and not limiting of the present disclosure.
  • the same reference numerals are the same or equivalent, and this is common throughout the specification.
  • the relative dimensional relationship, shape, etc. of each component may differ from the actual one.
  • the X direction indicates the horizontal direction of the refrigerant storage container, and the arrow indicates the direction from right to left.
  • the Y direction indicates the front-to-rear direction of the refrigerant storage container, and the arrow indicates the front-to-rear direction.
  • the Z direction indicates the vertical direction of the refrigerant storage container, and the arrow indicates the upward direction from the bottom.
  • FIG. 1 is a refrigerant circuit diagram of a refrigeration cycle device 100 having a refrigerant storage container 101 according to Embodiment 1.
  • a refrigeration cycle apparatus 100 according to Embodiment 1 includes a compressor 10, a flow path switching device 11, an outdoor heat exchanger 12, an expansion mechanism 13, an indoor heat exchanger 14, and a refrigerant storage container 101 .
  • Compressor 10 , flow switching device 11 , outdoor heat exchanger 12 , expansion mechanism 13 , indoor heat exchanger 14 , and refrigerant reservoir 101 are connected by refrigerant pipe 15 .
  • a refrigerant circuit 200 is formed in which the refrigerant circulates through the refrigerant pipe 15 .
  • the refrigerant storage container 101 is connected to the compressor 10 via the outflow pipe 3 that is part of the refrigerant pipe 15 .
  • the compressor 10 compresses the sucked refrigerant and discharges it in a high-temperature and high-pressure state.
  • Compressor 10 is, for example, an inverter compressor.
  • the refrigerant discharged from the compressor 10 flows into the outdoor heat exchanger 12 or the indoor heat exchanger 14 via the flow switching device 11 .
  • the channel switching device 11 has a function of switching the coolant channel. Cooling and heating are switched by the channel switching device 11 .
  • cooling operation the refrigerant discharged from the compressor 10 flows through the outdoor heat exchanger 12, the expansion mechanism 13, the indoor heat exchanger 14, and the refrigerant storage container 101 in order, and returns to the compressor 10.
  • heating operation the refrigerant discharged from the compressor 10 flows through the indoor heat exchanger 14 , the expansion mechanism 13 , the outdoor heat exchanger 12 and the refrigerant storage container 101 in order, and returns to the compressor 10 .
  • the outdoor heat exchanger 12 functions as a condenser during indoor cooling
  • the indoor heat exchanger 14 functions as an evaporator
  • the indoor heat exchanger 14 functions as a condenser during indoor heating.
  • 12 functions as an evaporator.
  • the channel switching device 11 is, for example, a four-way valve.
  • the channel switching device 11 may be configured by combining two-way valves or three-way valves.
  • the expansion mechanism 13 is a decompression device that decompresses and expands the refrigerant flowing through the refrigerant circuit 200 .
  • the expansion mechanism 13 is, for example, an electronic expansion valve whose opening is variably controlled.
  • the refrigerant sucked into the compressor 10 is ideally a superheated gas.
  • the state of the refrigerant sucked into the compressor 10 depends on the refrigerant distribution within the refrigerant circuit 200 . Therefore, refrigerant containing liquid refrigerant may be sucked into the compressor 10 .
  • the refrigerant storage container 101 is installed on the upstream side of the compressor 10 in the refrigerant flow direction.
  • the gas-liquid two-phase refrigerant that has flowed out of the evaporator and passed through the flow path switching device 11 flows into the refrigerant storage container 101 from the inflow pipe 2 that is a part of the refrigerant pipe 15 .
  • the gas-liquid two-phase refrigerant that has flowed into the refrigerant storage container 101 is separated into gas refrigerant and liquid refrigerant, and the liquid refrigerant stays in the refrigerant storage content.
  • Gas refrigerant flows out of the refrigerant storage container 101 through the outflow pipe 3 and is sucked into the compressor 10 .
  • the liquid refrigerant is separated from the gas-liquid two-phase refrigerant and stored in the refrigerant storage container 101 , so that the liquid refrigerant can be prevented from being sucked into the compressor 10 .
  • the refrigeration cycle device 100 is not limited to an air conditioner capable of switching between cooling and heating operations as described above.
  • the refrigerant storage container 101 may be applied to refrigeration cycle devices such as dehumidifiers and refrigerator-freezers.
  • FIG. 2 is a front view showing the refrigerant storage container 101 according to Embodiment 1.
  • FIG. Arrows shown in FIG. 2 conceptually indicate the flow of the refrigerant.
  • FIG. 3 is a plan view showing the refrigerant storage container 101 according to Embodiment 1.
  • the refrigerant storage container 101 includes a container body 1, an inflow pipe 2, and an outflow pipe 3.
  • the container body 1 has a substantially truncated cone shape in which the cross-sectional area of the internal space gradually increases from the top to the bottom.
  • the refrigerant stays in the internal space of the container body 1 .
  • the inflow pipe 2 and the outflow pipe 3 are inserted into the upper space inside the container body 1 .
  • the inflow tube 2 and the outflow tube 3 may be inserted from the upper end of the container body 1 .
  • the inflow pipe 2 and the outflow pipe 3 may be inserted from the side of the container body 1 so as to be positioned in the upper space inside the container body 1 .
  • the refrigerant in a gas-liquid two-phase state passes through the inflow pipe 2 and flows into the container body 1 from the inflow port 2 a of the inflow pipe 2 .
  • the liquid refrigerant that has flowed in from the inflow port 2 a falls to the bottom surface of the container body 1 due to gravity and stays in the container body 1 .
  • the gas-liquid interface GLI rises. In other words, when the liquid refrigerant staying in the container body 1 increases, the gas-liquid interface GLI moves to the upper part of the container body 1 . Therefore, the distance between the gas-liquid interface GLI and the inflow pipe 2 and the outflow pipe 3 becomes closer as the amount of liquid refrigerant retained increases.
  • the gas refrigerant that has flowed into the container body 1 from the inlet 2a flows into the outlet pipe 3 from the outlet 3a.
  • the gas refrigerant flowing into the outflow pipe 3 flows out of the container body 1 through the outflow pipe 3 and is sucked into the compressor 10 .
  • the end of the inflow pipe 2 located inside the container body 1 has a bent portion 2b bent in the X direction.
  • the inflow port 2 a is provided in the bent portion 2 b so as to face the side surface of the container body 1 .
  • the distance between the inflow port 2a and the outflow port 3a can be increased. Therefore, it is possible to suppress the possibility that the liquid refrigerant flows from the inflow port 2a to the outflow port 3a. again.
  • the speed of the liquid refrigerant flowing through the inflow pipe 2 is suppressed at the bent portion 2b.
  • the force of the liquid refrigerant flowing out from the inlet 2a is weakened, and waving of the gas-liquid interface GLI when the liquid refrigerant falls onto the gas-liquid interface GLI can be suppressed.
  • the inflow port 2 a be provided at a position not overlapping the outflow pipe 3 in the vertical direction of the container body 1 .
  • FIG. 4 is a diagram showing the relationship between the height of the container body 1 of the refrigerant storage container 101 and the area of the cross section according to the first embodiment.
  • FIG. 5 is a diagram showing the relationship between the height of the container body 1 of the refrigerant storage container 101 and the volume inside the container body according to the first embodiment.
  • the container body 1 has a substantially truncated cone shape in which the cross-sectional area of the internal space gradually increases from the top to the bottom.
  • a cylindrical virtual container body VC is shown inside the container body 1 by broken lines for comparison with the container body 1 having a substantially truncated cone shape.
  • FIG. 4 a cross-sectional area relation diagram showing the relationship between the height of the container body and the cross-sectional area of the container body is shown on the right side of the paper.
  • the container main body 1 and virtual container main body VC of the refrigerant storage container 101 are shown on the left side of the drawing.
  • the container body 1 has a first height position HPt1 and a second height position Hpt2 indicating height positions.
  • the height corresponding to the first height position HPt1 is indicated by the first reference line L1
  • the height corresponding to the second height position Hpt2 is indicated by the second reference line.
  • the vertical axis indicates the height of the container main body 1 and the virtual container main body VC
  • the horizontal axis indicates the cross-sectional area of the container main body 1 and the virtual container main body VC.
  • the vertical axis increases in height toward the upper side of the paper surface
  • the horizontal axis increases in cross-sectional area toward the right side of the paper surface.
  • the solid line indicates the relationship between the height and the cross-sectional area of the container body 1
  • the thick dashed line indicates the relationship between the height and the cross-sectional area of the virtual container body VC.
  • the container body 1 Since the container body 1 has a substantially truncated cone shape in which the cross-sectional area increases toward the bottom, the cross-sectional area decreases toward the top of the container body 1 .
  • the virtual container main body VC is cylindrical, the cross-sectional area is constant regardless of the height of the virtual container main body VC.
  • the cross-sectional area of the container body 1 and the cross-sectional area of the virtual container body VC are equal. Therefore, in the cross-sectional area relationship diagram, the point indicating the cross-sectional area of the container body 1 at the first height position HPt1 and the point indicating the cross-sectional area of the virtual container body VC at the first height position HPt1 are the first point XPt1 overlap in Further, in the cross-sectional area relationship diagram, a point indicating the cross-sectional area of the container body 1 at the second height position HPt2 is indicated as a third point XPt3.
  • a point indicating the cross-sectional area of the virtual container main body VC at the second height position HPt2 is indicated as a second point XPt2.
  • the cross-sectional area of the container body 1 is larger than the cross-sectional area of the virtual container body VC. Therefore, the third point XPt3 is positioned to the right of the second point XPt2.
  • FIG. 5 an internal volume relation diagram showing the relationship between the height of the container body and the internal volume of the container body is shown on the right side of the paper.
  • a container body 1 and a virtual container body VC with a first height position HPt1 and a second height position Hpt2 are shown as in FIG.
  • FIG. 5 also shows a third height position HPt3 indicating the upper ends of the container body 1 and the virtual container body VC. Further, in the internal volume relationship diagram, the height corresponding to the third height position HPt3 is indicated by the third reference line L3.
  • the vertical axis indicates the height of the container main body 1 and the virtual container main body VC
  • the horizontal axis indicates the internal volume of the container main body 1 and the virtual container main body VC.
  • the vertical axis increases in height toward the upper side of the paper surface
  • the horizontal axis increases in internal volume toward the right side of the paper surface.
  • the relationship between the height of the container body 1 and the internal volume is indicated by a solid line
  • the relationship between the height of the virtual container body VC and the internal volume is indicated by a thick dashed line.
  • the container body 1 Since the container body 1 has a substantially truncated cone shape in which the area of the cross section increases toward the bottom surface, the inner volume that increases closer to the bottom surface of the container body 1 increases.
  • the virtual container main body VC is cylindrical, the internal volume that increases is constant regardless of the height of the virtual container main body VC.
  • the shape of the container body 1 and the shape of the virtual container body VC are the same and overlap each other.
  • the internal volume of the container body 1 increases between the first height position HPt1 and the third height position HPt3, and the virtual volume increases between the first height position HPt1 and the third height position HPt3. It is the same as the internal volume of the container body VC. Therefore, in the internal volume relationship diagram, the difference between the internal volume of the container body 1 and the internal volume of the virtual container body VC does not increase between the first reference line L1 and the third reference line L3.
  • a point indicating the internal volume of the container body 1 at the second height position HPt2 is indicated as a fifth point XPt5.
  • a point indicating the internal volume of the virtual container main body VC at the second height position HPt2 is indicated as a fourth point XPt4.
  • the fifth point XPt5 is positioned to the right of the fourth point XPt4.
  • the container body 1 since the container body 1 has a substantially truncated cone shape, it has a larger internal volume than the cylindrical virtual container body VC having the same height and the same top end shape. Therefore, the amount of liquid refrigerant that can be stored in the container body 1 is larger than the amount of liquid refrigerant that can be stored in the virtual container body VC. Further, since the container body 1 has a substantially truncated cone shape, the closer to the bottom surface, the greater the amount of liquid refrigerant per unit height. Therefore, the time required for the distance between the gas-liquid interface GLI and the outflow port 3a to approach becomes longer than in the virtual container main body VC.
  • the liquid refrigerant in the container main body 1, the liquid refrigerant can be retained for a longer period of time while keeping a distance between the outflow port 3a and the gas-liquid interface GLI.
  • undulation may occur at the gas-liquid interface GLI due to the inertial force of the inflowing gas-liquid two-phase refrigerant.
  • the liquid refrigerant scatters inside the container body 1 as droplets.
  • the possibility of reaching the outlet 3a is low. Therefore, it is possible to prevent the liquid refrigerant from flowing out of the container body 1 .
  • the larger the area of the gas-liquid interface GLI the wider the range of waviness at the gas-liquid interface GLI.
  • the amount of scattered droplets increases in proportion to the area of the gas-liquid interface GLI.
  • the cross-sectional area of the gas-liquid interface GLI is smaller than the cross-sectional area of the bottom surface of the container body 1 . Therefore, the amount of droplets that scatter can be reduced, and the possibility that the droplets reach the outlet 3a is reduced.
  • the container body 1 can store a large amount of liquid refrigerant at a position away from the outlet 3a, and when the distance between the outlet 3a and the gas-liquid interface GLI becomes short, liquid droplets flow into the outlet 3a. You can limit the chances of reaching it.
  • the refrigerant storage container 101 has the container body 1 that stores the refrigerant and the inlet 2a that is inserted into the upper space in the container body 1 and allows the refrigerant to flow into the container body 1.
  • An inflow pipe 2 and an outflow pipe 3 inserted into the upper space in the container body 1 and having an outflow port 3a through which the refrigerant flows out of the container body 1 are provided.
  • the cross-sectional area of the internal space of the container body 1 where the outflow port 3a of the outflow pipe 3 is located increases toward the bottom surface of the container body 1 as the distance from the outflow port 3a increases.
  • the cross-sectional area of the internal space of the container body 1 is smaller as it is closer to the outflow port 3a. That is, even if the liquid refrigerant stays in the container body 1 and the distance between the gas-liquid interface GLI and the outflow port 3a becomes short, the rippling of the gas-liquid interface GLI can reduce the amount of droplets that scatter. Therefore, it is possible to prevent the liquid refrigerant from flowing out of the container body 1 .
  • the inflow pipe 2 and the outflow pipe 3 are inserted from the upper end of the container main body 1, and the inflow pipe 2 flows below the outflow port 3a of the outflow pipe 3. Entrance 2a is located. According to this configuration, since the inflow port 2a is located below the outflow port 3a, the liquid refrigerant falling from the inflow port 2a is less likely to flow into the outflow port 3a.
  • outflow port 3a is located above the inflow port 2a, even if the liquid refrigerant flowing into the container body 1 from the inflow port 2a undulates the gas-liquid interface GLI and the droplets scatter, the scattered droplets It is difficult to flow into the outflow port 3a.
  • the configuration of the refrigeration cycle apparatus 100 includes the refrigerant storage container 101 and the compressor 10 connected to the refrigerant storage container 101 via the outflow pipe 3 . According to this configuration, it is possible to prevent the liquid refrigerant from being sucked into the compressor 10 from the refrigerant storage container 101 through the outflow pipe 3 . Therefore, it is possible to reduce the possibility that the refrigerating machine oil of the compressor 10 is diluted and seizure of the sliding portion of the compressor occurs.
  • Embodiment 2 A container main body 1A and an inflow pipe 2A of a refrigerant storage container 101A according to the present embodiment are different in configuration from the container main body 1 and the inflow pipe 2 of the first embodiment, respectively.
  • Refrigerant storage container 101A of the present embodiment will be described below, focusing on differences from refrigerant storage container 101 of the first embodiment.
  • the refrigerant storage container 101 according to Embodiment 1 can be replaced with the refrigerant storage container 101A according to this embodiment.
  • the configuration of the refrigeration cycle device 100 other than the refrigerant storage container is the same as that of the first embodiment, so the description is omitted. Also, the same reference numerals are given to the same components as those in the first embodiment, and the description thereof will be omitted as appropriate.
  • FIG. 6 is a front view showing a refrigerant storage container 101A according to Embodiment 2.
  • FIG. Solid-line arrows shown in FIG. 6 conceptually indicate the flow of the refrigerant.
  • FIG. 7 is a sectional view showing the AA section of FIG.
  • the container main body 1A of the refrigerant storage container 101A according to this embodiment is cylindrical.
  • a shielding plate 4 is provided in the container body 1A.
  • the inflow pipe 2A and the outflow pipe 3 are inserted into the upper space inside the container main body 1A. As shown in FIG. 6, the inflow tube 2A and the outflow tube 3 may be inserted from the upper end of the container body 1A.
  • the shielding plate 4 partitions the inside of the container body 1A into a first area SP1 where the outflow port 3a of the outflow tube 3 is located and a second area SP2 where the inflow port 2a of the inflow tube 2A is located.
  • the shielding plate 4 is arranged so that the cross-sectional area of the internal space of the container body 1A where the outflow port 3a is positioned increases toward the bottom surface of the container body 1A as the distance from the outflow port 3a increases. be provided.
  • the container body 1A is cylindrical, but by providing the shielding plate 4 inside the container body 1A, the internal space where the outflow port 3a is located becomes the first truncated cone-shaped region. It is formed as SP1.
  • the internal space of the container body 1A consists of a first region SP1 surrounded by the shield plate 4, a second region SP2 between the side surface of the container body 1A and the shield plate 4, the lower end of the shield plate 4 and the container body 1A. and the bottom surface of the third region SP3. Both the first region SP1 and the second region SP2 are connected to the third region SP3. Therefore, the first region SP1, the second region SP2, and the third region SP3 communicate with each other.
  • the outflow port 3a is arranged in the first region SP1, and the inflow port 2a is arranged in the second region SP2.
  • the gas-liquid two-phase refrigerant flows into the second region SP2 from the inlet 2a.
  • the gas refrigerant passes through the third region SP3 and flows into the first region SP1.
  • the gas refrigerant that has flowed into the first region SP1 flows into the outflow pipe 3 through the outflow port 3a and out of the container main body 1A.
  • the liquid refrigerant passes through the second area SP2 and stays in the third area SP3. As the amount of liquid refrigerant remaining increases, the gas-liquid interface GLI rises. When the liquid refrigerant that exceeds the volume of the third area SP3 stays, the liquid refrigerant stays in the first area SP1 and the second area SP2.
  • the gas-liquid interface GLI is located in the first area SP1 and the second area SP2.
  • the second area SP2 and the third area SP3 serve as passages through which the refrigerant flowing from the inlet 2a reaches the first area SP1 and the outlet 3a.
  • the shielding plate 4 may be connected to the side surface of the container body 1A.
  • the shielding plate 4 may be connected to the inner surface of the container body 1A via a hanger attached to the inner surface of the container body 1A.
  • the shield plate 4 may be provided with a through hole for the outflow pipe 3 to pass through.
  • the outflow pipe 3 passes through the through hole and reaches the first region SP1. Therefore, the outflow port 3a can be arranged in the first region SP1.
  • the inflow pipe 2A may be inserted into the second region SP2 from the upper end portion of the container body 1A, or may be inserted into the second region SP2 from the side surface of the container body 1A.
  • the distance between the inflow port 2a and the outflow port 3a does not need to be large, and the flow velocity of the refrigerant flowing into the container main body 1A does not need to be slowed down. Therefore, as shown in FIGS. 6 and 7, the inflow pipe 2A need not have the bent portion 2b.
  • Refrigerant storage container 101A includes shield plate 4 provided in container body 1A. It is partitioned into a certain first area SP1 and a second area SP2 where the inflow port 2a of the inflow pipe 2A is located. A third region SP3 is formed between the lower end of the shielding plate 4 and the bottom surface of the container body 1A. The first area SP1 and the second area SP2 are connected to the third area SP3.
  • the inflow port 2a and the outflow port 3a are partitioned by the shield plate 4. Therefore, it is possible to suppress the liquid refrigerant flowing out from the inlet 2a from flowing into the outlet 3a.
  • the container body 1A is cylindrical, it can store more liquid refrigerant than a truncated cone-shaped container body having the same height and the same cross-sectional area of the bottom surface.
  • the shielding plate 4 is provided inside the cylindrical container main body 1A, even when the distance between the outflow port 3a and the gas-liquid interface GLI becomes short, the crossing of the gas-liquid interface GLI close to the outflow port 3a is prevented.
  • the area is smaller than the cross-sectional area of the bottom surface of the container body 1A. Therefore, even when the distance between the outflow port 3a and the gas-liquid interface GLI is short, the area where waviness occurs at the gas-liquid interface GLI is small, so the amount of scattering droplets can be suppressed.
  • the shielding plate 4 has a hollow truncated cone shape with open top and bottom surfaces that spreads from the upper end of the container body 1A toward the bottom surface.
  • the inner space surrounded by the shielding plate 4 is the first region SP1
  • the space between the side surface of the container body 1A and the shielding plate 4 is the second region SP2.
  • Shielding plate 4A of refrigerant storage container 101B according to the present embodiment differs in configuration from shielding plate 4 of the second embodiment.
  • the shielding plate 4A of the present embodiment will be described below, focusing on the differences from the shielding plate 4 of the second embodiment.
  • the refrigerant storage container 101 according to Embodiment 1 can be replaced with the refrigerant storage container 101B according to this embodiment.
  • the configuration of the refrigeration cycle device 100 other than the refrigerant storage container is the same as that of the first embodiment, so the description is omitted.
  • the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
  • FIG. 8 is a front view showing a refrigerant storage container 101B according to Embodiment 3.
  • FIG. Solid-line arrows shown in FIG. 8 conceptually indicate the flow of the refrigerant.
  • 9 is a sectional view showing a BB section of FIG. 8.
  • FIG. 10 is a sectional view showing the CC section of FIG.
  • the shielding plate 4A has a plurality of through holes 6. As shown in FIG.
  • the shape of the through-hole 6 is circular, for example. Moreover, the shape of the through-hole 6 may be an ellipse.
  • the BB section shown in FIG. 8 where the through holes 6 are not provided is the same as the AA section of the container body 1A shown in FIG. 6 of the second embodiment. be. 7 and 9 therefore show the same cross-sectional view.
  • the plurality of through holes 6 are provided at the same height position in the vertical direction of the container body 1A. Further, as shown in FIG. 10, a plurality of through holes 6 are provided in the circumferential direction of the shielding plate 4A. Although two through-holes 6 are shown in FIG. 10, one or more through-holes 6 are sufficient. Further, in addition to the plurality of through holes 6 provided at the same height position in the vertical direction of the container body 1A, the through holes 6 may be provided at different height positions.
  • liquid refrigerant exceeding the volume of the third area SP3 stays in the first area SP1 and the second area SP2.
  • the pressure in the second area SP2 becomes higher than the pressure in the first area SP1. Therefore, refrigerant pulsation occurs between the first region SP1 and the second region SP2.
  • the through holes 6 are provided in the shielding plate 4 in the present embodiment, the gas refrigerant flows from the second region SP2 to the first region SP1 through the through holes 6 . Therefore, the pressure increase in the second region SP2 is suppressed. Therefore, the pulsation of the refrigerant between the first region SP1 and the second region SP2 is suppressed.
  • the shield plate 4A has a through hole 6, and the first area SP1 and the second area SP2 communicate with each other through the through hole 6. According to this configuration, the gas refrigerant that has flowed into the second region SP2 passes through the through holes 6 and flows into the first region SP1. Therefore, the pressure fluctuation inside the container body 1A is suppressed, and as a result, the pulsation of the refrigerant is suppressed.
  • the shielding plate 4A has a plurality of through holes 6, and at least two or more of the plurality of through holes 6 are located in the container main body 1A. are provided at the same height position in the vertical direction. According to this configuration, the gas refrigerant efficiently flows from the second region SP2 to the first region SP1 as compared with the case where the through holes 6 are arranged in the vertical direction of the container body 1A.
  • refrigerant storage containers 101, 101A, and 101B and refrigeration cycle device 100 are not limited to Embodiments 1 to 3 described above.
  • the configuration of the refrigerant storage container may be such that the container main body 1 of the first embodiment is provided with the shielding plate 4 of the second embodiment.
  • the configuration of the refrigerant storage container may be such that the inflow pipe 2 of the first embodiment is provided in the container main body 1A of the second embodiment.
  • Embodiments 1 to 3 can be combined with each other as long as the functions or structures of the respective embodiments are not impaired.

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PCT/JP2021/027919 2021-07-28 2021-07-28 冷媒貯留容器及びこの冷媒貯留容器を備えた冷凍サイクル装置 Ceased WO2023007620A1 (ja)

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PCT/JP2021/027919 WO2023007620A1 (ja) 2021-07-28 2021-07-28 冷媒貯留容器及びこの冷媒貯留容器を備えた冷凍サイクル装置
CN202180100642.7A CN117677809A (zh) 2021-07-28 2021-07-28 制冷剂储存容器和具有该制冷剂储存容器的制冷循环装置
JP2023537820A JPWO2023007620A1 (https=) 2021-07-28 2021-07-28
EP21951826.3A EP4379291A1 (en) 2021-07-28 2021-07-28 Refrigerant storage container, and refrigeration cycle device provided with said refrigerant storage container
US18/564,131 US20240247846A1 (en) 2021-07-28 2021-07-28 Refrigerant reservoir container and refrigeration cycle device including the same

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PCT/JP2021/027919 WO2023007620A1 (ja) 2021-07-28 2021-07-28 冷媒貯留容器及びこの冷媒貯留容器を備えた冷凍サイクル装置

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JPH1062037A (ja) * 1996-08-21 1998-03-06 Mitsubishi Electric Corp アキュムレータ
JP2003222445A (ja) * 2002-01-30 2003-08-08 Denso Corp エジェクタサイクル用の気液分離器及びオイル分離器
JP2008151374A (ja) * 2006-12-15 2008-07-03 Sanden Corp 蒸気圧縮式冷凍サイクル
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JP2015172469A (ja) 2014-03-12 2015-10-01 カルソニックカンセイ株式会社 気液分離器

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