WO2019069641A1 - アキュームレータ - Google Patents

アキュームレータ Download PDF

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Publication number
WO2019069641A1
WO2019069641A1 PCT/JP2018/033612 JP2018033612W WO2019069641A1 WO 2019069641 A1 WO2019069641 A1 WO 2019069641A1 JP 2018033612 W JP2018033612 W JP 2018033612W WO 2019069641 A1 WO2019069641 A1 WO 2019069641A1
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WO
WIPO (PCT)
Prior art keywords
desiccant
lid
tank
pipe
accumulator
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/JP2018/033612
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English (en)
French (fr)
Japanese (ja)
Inventor
侯史 細川
武治 小澤
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.)
Fujikoki Corp
Original Assignee
Fujikoki 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 Fujikoki Corp filed Critical Fujikoki Corp
Priority to CN201880064769.6A priority Critical patent/CN111194392B/zh
Priority to EP18864711.9A priority patent/EP3671074B1/en
Publication of WO2019069641A1 publication Critical patent/WO2019069641A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/03—Suction accumulators with deflectors

Definitions

  • the present invention relates to an accumulator (gas-liquid separator) used for a heat pump type refrigeration cycle such as a car air conditioner, a room air conditioner, and a refrigerator.
  • a heat pump type refrigeration cycle such as a car air conditioner, a room air conditioner, and a refrigerator.
  • a bottomed cylindrical tank whose top opening is airtightly closed by a lid member provided with an inlet and an outlet, and a bowl-like or inverted thin diameter smaller than the inner diameter of this tank
  • a bowl-shaped gas-liquid separator an outlet pipe with a double-pipe structure consisting of an inner pipe and an outer pipe whose upper end is connected to the outlet and hanging down, provided near the bottom of (outer pipe of) this outlet pipe
  • a liquid-phase refrigerant a strainer for capturing and removing foreign substances contained in oil (refrigerant oil) mixed therein
  • a bag containing a desiccant for absorbing and removing water in the refrigerant, and the like.
  • the refrigerant (gas-liquid two-phase refrigerant) introduced into the accumulator collides with the gas-liquid separator and is radially diffused to be separated into liquid-phase refrigerant and gas-phase refrigerant, and liquid-phase refrigerant (including oil)
  • the gas flows down along the inner circumferential surface of the tank and accumulates in the lower part of the tank, and the gas phase refrigerant descends the space (gas phase refrigerant lower flow path) formed between the inner pipe and the outer pipe in the outflow pipe
  • the space in the inner pipe is raised to be drawn to the suction side of the compressor and circulated.
  • a gas-liquid separator made by pressing a metal plate material as a material and a bag made of a cloth-like body such as felt are separately prepared and placed in a tank. Since it is necessary to arrange, the number of parts increases, which may lead to an increase in assembly man-hours, weight, cost and the like.
  • the refrigerant introduced into the accumulator is separated into the liquid phase refrigerant and the gas phase refrigerant by the gas-liquid separator, but the desiccant is vertically packaged and disposed in a tank, etc.
  • the proportion of the desiccant that absorbs only water in the separated gas phase refrigerant increases, and there is a concern that the rate of moisture absorption of the liquid phase refrigerant by the desiccant may be reduced.
  • the present invention has been made in view of the above circumstances, and the object of the present invention is to reduce the number of parts, to reduce the number of assembling steps, weight, cost and the like, and to absorb moisture by the desiccant. It is an object of the present invention to provide an accumulator capable of quickly absorbing moisture in the refrigerant effectively.
  • the accumulator basically comprises a tank provided with an inlet and an outlet, one end side connected to the outlet, and the other end opened in the tank. And a desiccant storage portion containing a desiccant, wherein the desiccant storage portion is fixedly disposed on the lower side of the inflow port and opposite to the inflow port, the inflow port The refrigerant flowing into the tank is received from the upper surface side and allowed to flow downward therefrom.
  • the desiccant containing portion covers the other end side opening of the outflow pipe.
  • the desiccant storage portion is held at a reduced pressure by the tank and the outflow pipe.
  • the refrigerant received in the desiccant storage portion is allowed to flow downward through a gap formed between the outer periphery of the desiccant storage portion and the inner periphery of the tank. Ru.
  • the desiccant storage portion has a box-shaped holding member whose upper side is open, and a lid-like pressing member attached to the upper surface opening of the box-like holding member.
  • a flow passage is provided for passing the refrigerant flowing into the tank from the inlet and for letting the refrigerant received in the desiccant storage portion overflow to the outside.
  • box-like holding member and the lid-like pressing member are connected in a snap fit manner.
  • the refrigerant received in the desiccant storage portion is allowed to flow downward through a hole provided at the bottom of the desiccant storage portion.
  • the desiccant containing portion has a plate-shaped holding member provided with the hole, and a lid-like pressing member disposed on the upper side of the plate-like holding member, and the lid-like pressing member There is provided a flow port for passing the refrigerant that has flowed into the tank from the inlet.
  • the holes are formed in a uniform distribution at the bottom of the desiccant storage portion.
  • the hole is formed in the outer peripheral portion of the bottom of the desiccant storage portion.
  • the lid-like pressing member is provided with a convex rib for reinforcement and positioning.
  • the outlet pipe has a double pipe structure comprising an inner pipe connected to the outlet and suspended in the tank, and an outer pipe disposed on the outer periphery of the inner pipe. Be done.
  • the desiccant storage portion containing the desiccant is fixedly disposed on the lower side of the inlet and opposed to the inlet, and the refrigerant flowing into the tank from the inlet is viewed from the top side It is adapted to be received and to flow downwards, during which the refrigerant is separated into liquid phase refrigerant and gas phase refrigerant. Therefore, compared with the conventional accumulator in which the gas-liquid separator and the bag containing the desiccant are separately provided, the number of parts can be reduced, and the number of assembling processes, weight, cost and the like can be reduced.
  • the rate of moisture absorption by the desiccant can be increased, and the moisture in the refrigerant can be effectively absorbed.
  • FIG. 1 is a longitudinal sectional view showing a first embodiment of an accumulator according to the present invention.
  • Sectional drawing according to the UU arrow line of FIG. Sectional drawing according to the VV arrow line of FIG.
  • the longitudinal cross-sectional view which shows the box-shaped holding member in the desiccant container shown by FIG.
  • the top view which shows the box-shaped holding member in the desiccant container shown by FIG.
  • the longitudinal cross-sectional view which shows the lid-like pressing member in the desiccant container shown by FIG.
  • the top view which shows the lid-like pressing member in the desiccant container shown by FIG.
  • the longitudinal cross-sectional view which shows the sheet-like cloth-like body in the desiccant container shown by FIG.
  • FIG. 8 is a top view showing a lid-like pressing member in the desiccant container shown in FIG.
  • FIG. 7 The longitudinal cross-sectional view which shows the other example of the plate-shaped holding member in the desiccant container of the accumulator shown by FIG.
  • First Embodiment 1 is a longitudinal sectional view showing a first embodiment of an accumulator according to the present invention
  • FIG. 2 is a sectional view taken along the line U--U in FIG. 1
  • FIG. 3 is a cross section taken along the line V--V in FIG. FIG.
  • the accumulator 1 according to the first embodiment is, for example, used as an accumulator in a refrigeration cycle constituting a car air conditioner for electric vehicles, and has a bottomed cylindrical tank (accumulator main body) 10 made of metal such as stainless steel or aluminum alloy.
  • the top opening of the tank 10 is airtightly closed by a lid 12 made of the same metal.
  • the accumulator 1 of the present embodiment is, for example, vertically disposed as illustrated, that is, the lid member 12 is on the upper side and the bottom portion 13 of the tank 10 is on the lower side.
  • the tank 10 and the lid member 12 may be collectively referred to as a tank.
  • An inlet 15 and a stepped outlet 16 are provided side by side on the lid member 12, and a diameter slightly smaller than the inner diameter of the tank 10 is provided on the lower side of the lid member 12 in order to absorb and remove moisture in the refrigerant.
  • a desiccant container (a desiccant containing portion) 50 containing desiccant M is disposed, and the upper end of the outflow pipe 30 is connected to the lower portion of the outlet 16.
  • a stepped cylindrical portion 12a forming a lower portion of the outlet 16 is provided on the lower surface of the lid member 12 and a step portion of the cylindrical portion 12a is provided with a desiccant container 50 (a lid
  • a positioning recess 12b is provided for defining the rotational position (angle) of the pressing member 55) (see particularly FIG. 3).
  • the desiccant accommodation unit is a surrounding area defined by the desiccant container 50, and accommodates and holds the desiccant M therein.
  • the inner pipe 31 has a double pipe structure including an inner pipe 31 suspended in the tank 10 through the hole 53 and a bottomed outer pipe 32 disposed on the outer periphery of the inner pipe 31.
  • a plate-like rib 33 for securing a predetermined gap between the outer pipes 32 is formed.
  • three ribs 33 are provided along the longitudinal direction (vertical direction) of the inner pipe 31 and the outer pipe 32 and at equal angular intervals (120 ° intervals).
  • the inner pipe 31, the outer pipe 32, and the rib 33 constituting the outflow pipe 30 are integrally formed by extrusion molding using a synthetic resin material, an aluminum material or the like. That is, the above-mentioned double-pipe structure is made into the integral molding using aluminum extrusion material etc.
  • the inner pipe 31 and the outer pipe 32 constituting the outflow pipe 30 may be formed as separate parts, and the rib 33 may be formed on at least one of the inner pipe 31 and the outer pipe 32.
  • a plurality of plate-like members are provided along the longitudinal direction (vertical direction) outside the inner pipe 31 (a portion below the ceiling 52a of the hat-shaped portion 52 of the desiccant container 50) and at equal angular intervals.
  • the ribs may be projected radially outward, and an outer pipe 32 formed as a separate part from the inner pipe 31 may be externally fitted and fixed on the outer peripheral side of the plurality of ribs in a manner of press-fitting.
  • the rib 33 may be omitted.
  • the lower end portion of the outer pipe 32 is internally fitted and fixed to an upper portion 42 a with an inner circumferential step in a case 42 of a strainer 40 described later.
  • the lower end of the inner pipe 31 is positioned slightly above the bottom portion 32b of the outer pipe 32, and the upper end of the outer pipe 32 is slightly below the lid member 12 (and the hat-shaped portion 52 of the desiccant container 50 described later Located inside).
  • An oil return hole 35 is formed in the center of the bottom 32 b of the outer pipe 32.
  • the hole diameter of the oil return hole 35 is set to, for example, about 1 mm.
  • the bottom portion 32 b of the outer pipe 32 may be formed integrally with the cylindrical portion of the outer pipe 32, but it is separated from the cylindrical portion, and this is used as the cylindrical portion and the strainer 40. It may be fixed by being sandwiched between the case 42 and the case 42.
  • the strainer 40 is placed on and fixed to the bottom portion 13 of the tank 10, and a cylindrical mesh filter 45 integrated with a bottomed cylindrical case 42 made of a synthetic resin and the case 42 by insert molding or the like. And consists of The mesh filter 45 is made of, for example, a wire mesh, a synthetic resin mesh material, or the like.
  • the desiccant container 50 has a substantially thin bowl-like or cup-like box-shaped holding member 51 opened upward, and a lid-like pressing member 55 is attached to the upper surface opening of the box-like holding member 51. It is fixedly arranged under the inflow port 15 so as to cover an opening (an opening on the other end side of the outflow pipe 30) formed by the inner pipe 31 and the outer pipe 32 (the upper end portion thereof).
  • the box-shaped holding member 51 is made of, for example, a synthetic resin, and is formed to have a diameter slightly smaller than the inner diameter of the tank 10 and the inflow port 15 as well understood by referring to FIG. 4A and FIG. And a short cylindrical peripheral wall 51b that rises upward from the outer periphery of the bottom wall 18a.
  • a hat-shaped portion 52 larger in diameter than the outer diameter of the outflow pipe 30 (the outer pipe 32) and lower than the height (in the vertical direction) of the peripheral wall 51b (upwardly
  • the through hole 53 is provided in the ceiling portion 52a of the hat-shaped portion 52 so that the upper end portion of (the inner pipe 31 of) the outflow pipe 30 is inserted.
  • the upper portion of the inner pipe 31 of the outflow pipe 30 and the upper end of the outer pipe 32 are disposed inside the hat-shaped portion 52, and the inner pipe 31 of the outflow pipe 30 and the upper portion of the outer pipe 32 are An opening (an opening on the other end side of the outflow pipe 30) formed by (the upper end portion of) the outer pipe 32 is covered. Further, in the upper portion of the peripheral wall 51b, fitting recesses 54 (four in the illustrated example, provided at equal angular intervals for locking tongue-like pieces 59 provided on the outer periphery of a lid-like pressing member 55 described later) The fitting recess 54) is formed.
  • the lid-like pressing member 55 is made of metal such as stainless steel or aluminum alloy, for example, and as shown in FIGS. 5 and 5B together with FIG. 1 and FIG.
  • the ring-shaped outer ring 58 is formed to have a slightly smaller diameter than the inner diameter of the tank 10, which connects the outer ends of the two. From the inner ring 56 to the connecting arm 57, a convex reinforcing rib 60 projecting upward is provided (radially from the center of the inner ring 56).
  • each connection arm 57 is set such that one of the five flow openings 61 formed between the connection arms 57 is positioned below the inflow port 15 (in particular, See Figure 2).
  • tongue-like pieces 59 (in the illustrated example, four tongue-like pieces provided at equal angular intervals) fitted in the fitting recess 54 of the box-like holding member 51. 59) is extended (outwardly).
  • the box-like holding member 51 and the lid-like pressing member 55 are connected in a snap-fit manner by locking the tongue-like piece 59 of the lid-like pressing member 55 in the fitting recess 54 of the box-like holding member 51. It is fixed.
  • the connection between the box-like holding member 51 and the lid-like pressing member 55 may be performed, for example, by caulking, welding, welding, etc. in a form other than a snap fit type by the fitting recess 54 and the tongue piece 59. Of course.
  • a sheet-like cloth-like body 65 made of felt or the like having air permeability and water permeability is extrapolated and disposed.
  • the sheet-like cloth-like body 65 has a thickness corresponding to the difference in height between the peripheral wall 51b of the box-like holding member 51 and the hat-like part 52, and the sheet-like cloth-like body 65 has a stepped cylindrical part 12a.
  • the insertion hole 65a by which the lower part is inserted is penetratingly provided.
  • the sheet in the box-shaped holding member 51 (specifically, an annular space formed between the hat-shaped portion 52 and the peripheral wall portion 51b in the box-shaped holding member 51)
  • the granular desiccant M is loaded (included) in a state of being slightly compressed by the cloth-like body 65.
  • the desiccant container 50 (the desiccant container 50 in which the box-shaped holding member 51, the desiccant M, the sheet-like cloth 65, and the lid-like pressing member 55 are assembled) and the outflow tube 30 to the lid member 12
  • the desiccant container 50 is mounted on the lower surface of the lid member 12 so that the lid-like pressing member 55 and the sheet-like cloth member 65 of the desiccant container 50 are covered with the lower part of the cylindrical portion 12 a of the lid member 12.
  • the rotational position of the desiccant container 50 with respect to the lid member 12 is positioned by the positioning recess 12 b of the cylindrical portion 12 a of the lid member 12 and the convex rib 60 on the upper surface of the lid-like pressing member 55. Then, the upper end portion (portion above the portion where the rib 33 is formed) of the inner pipe 31 is passed through the through hole 53 provided in the desiccant container 50 (the ceiling portion 52a of the hat shaped portion 52) and the outlet Press-fit or expand and fix from below to 16. Thus, the desiccant container 50 is held and fixed so as to be held between the rib 33 of the outflow pipe 30 and the lower end surface of the lid member 12 (the cylindrical portion 12a thereof).
  • the desiccant container 50 is provided with the brim portion and the lower end face of the lid member 12 (the cylindrical portion 12a thereof) It may be held and fixed by being sandwiched by
  • the low-temperature low-pressure gas-liquid mixed refrigerant from the evaporator is introduced into the tank 10 via the inflow port 15, and the introduced refrigerant is contained in the desiccant container 50. It is received in the desiccant container 50 through the flow opening 61 formed in the lid-like pressing member 55, passes through the sheet-like cloth 65 and the desiccant M, and is accumulated in the box-like holding member 51.
  • the refrigerant accumulated in the box-shaped holding member 51 exceeds a predetermined amount, the refrigerant passes through (the outer peripheral portion of) the flow port 61 and passes over the (upper end) of the peripheral wall 51b of the box-shaped holding member 51
  • the desiccant container 50 passes between the outer periphery of the desiccant container 50 (the peripheral wall 51b of the box-like holding member 51) and the inner periphery of the tank 10 (a cylindrical gap formed therein). Flow down (spill down).
  • the refrigerant is diffused and separated into a liquid-phase refrigerant and a gas-phase refrigerant, and the liquid-phase refrigerant (including oil) flows down in the tank 10 and accumulates in the lower space of the tank 10
  • the phase refrigerant is drawn to the suction side of the compressor through the space formed between the inner pipe 31 and the outer pipe 32 in the outflow pipe 30 (gas phase refrigerant lower flow path) ⁇ the inner space of the inner pipe 31 and circulated.
  • the oil accumulated in the lower space of the tank 10 together with the liquid phase refrigerant moves to the bottom portion 13 side of the tank 10 due to the difference in specific gravity and property with the liquid phase refrigerant, and the compressor suction side via the outflow pipe 30
  • the refrigerant is drawn into the gas phase refrigerant sucked into the air flow through the inner space of the mesh filter 45 ⁇ oil return hole 35 ⁇ inner pipe 31 of the strainer 40 and returned to the compressor suction side together with the gas phase refrigerant for circulation.
  • foreign matter such as sludge is captured, and the foreign matter is removed from the circulating refrigerant (including oil).
  • the desiccant container (drying agent storage unit) 50 containing the desiccant M is fixedly disposed below the inflow port 15 and opposite to the inflow port 15.
  • the refrigerant flowing from the inflow port 15 into the tank 10 is received from the upper surface side (the flow opening 61 which is the upper surface opening) and is allowed to flow downward, and the flow of the refrigerant is liquid phase refrigerant It is separated into gas phase refrigerants. Therefore, compared with the conventional accumulator in which the gas-liquid separator and the bag containing the desiccant are separately provided, the number of parts can be reduced, and the number of assembling processes, weight, cost and the like can be reduced.
  • the refrigerant flowing from the inlet 15 into the tank 10 surely passes the desiccant M in the desiccant container 50, the rate of moisture absorption by the desiccant M is increased, and the moisture in the refrigerant is effectively absorbed. be able to.
  • Second Embodiment 7 is a longitudinal sectional view showing a second embodiment of the accumulator according to the present invention
  • FIG. 8 is a sectional view taken along the line UU arrow in FIG. 7
  • FIG. 9 is a sectional taken along the line VV in FIG. FIG.
  • the accumulator 2 of the illustrated second embodiment differs from the accumulator 1 of the first embodiment only in the configuration of the desiccant container 50 containing the desiccant M, and the other configuration is the same. Therefore, in the following embodiments, only the differences will be mainly described.
  • the same reference numerals are given to the parts corresponding to the respective parts of the accumulator 1 of the first embodiment.
  • the desiccant container (drier containing portion) 70 containing desiccant M fixedly disposed below the lid member 12 has a substantially disk-shaped plate-shaped holding member 71, and this plate A lid-like pressing member 75 is attached to the upper side of the holding member 71.
  • the desiccant accommodation unit is a surrounding area defined by the desiccant container 70, and accommodates and holds the desiccant M therein.
  • the plate-like holding member 71 is made of, for example, a synthetic resin, and is formed to have substantially the same diameter as the inner diameter of the tank 10 as well as seen in FIGS. 10A and 10B together with FIG.
  • a hat-shaped portion 72 (the upper end portion of (the inner pipe 31 of the outflow pipe 30) of the same shape as that of the hat-shaped portion 52 of the first embodiment is inserted below the outflow port 16 and is disposed opposite to the V.15.
  • a hat-shaped portion 72) provided in the ceiling portion 72a with a through hole 73 is protruded (upwardly). That is, in the second embodiment, the peripheral wall 51b having the fitting recess 54 in the first embodiment is omitted.
  • a plurality of pores 71 c are opened in the plate-like holding member 71 (in particular, a portion other than the hat-shaped portion 72).
  • the plurality of pores 71c are formed in the plate-like holding member 71 so as to have a substantially even distribution (a hole density is substantially uniform).
  • the lid-like pressing member 75 is made of metal such as stainless steel or aluminum alloy, for example, and its basic shape (specifically, as shown in FIGS. 7 and 8 as well as FIGS. 11A and 11B).
  • the inner ring 76, the connecting arm 77, and the shape of the reinforcing convex rib 80 formed from the inner ring 76 to the connecting arm 77) are the same as the shape of the lid-like pressing member 55 of the first embodiment.
  • the (outer diameter) of the outer ring 78 in the lid-like pressing member 75 is formed to have substantially the same diameter as the inner diameter of the tank 10. That is, in the present embodiment, the tongue-like piece portion 59 in the first embodiment is omitted.
  • the sheet-like cloth-like body 85 having the same shape as that of the sheet-like cloth-like body 65 of the first embodiment is disposed on the lower surface side of the lid-like pressing member 75
  • a sheet-like cloth-like body 86 made of air-permeable, water-permeable felt or the like is also disposed on the upper surface side of 71 (in particular, the outer peripheral portion of the hat-shaped portion 72).
  • the thickness of the sheet-like cloth 86 disposed on the lower side is slightly smaller than the thickness of the sheet-like cloth 85 disposed on the upper side.
  • the space between the plate-like holding member 71 and the lid-like pressing member 75 and the inner wall of the tank 10 (more specifically, the plate-like holding member 71, the lid-like pressing member 75 and the tank 10 In a state where the sheet-like cloth-like body 85 and the sheet-like cloth-like body 86 are slightly compressed (from above and below) and sandwiched in an annular space formed outside the hat-shaped portion 72 between the inner wall and And granular desiccant M is filled (included).
  • the desiccant M is held between the plate-like holding member 71 and the lid-like pressing member 75 via the sheet-like cloth members 85 and 86.
  • the desiccant container 70 (the plate-like holding member 71, the sheet-like cloth 86, the desiccant M, the sheet-like cloth 85, and the lid-like pressing member 75 are stacked in order from the lower side on the lid 12).
  • the lid-like pressing member 75 and the sheet-like cloth-like body 85 of the desiccant container 70 are covered with the lower part of the cylindrical part 12a of the lid 12
  • the desiccant container 70 is mounted on the lower surface of the member 12.
  • the rotational position of the desiccant container 70 with respect to the lid member 12 is positioned by the positioning recess 12 b of the cylindrical portion 12 a of the lid member 12 and the convex rib 80 on the upper surface of the lid-like pressing member 75. Then, the upper end portion (portion above the portion where the rib 33 is formed) of the inner pipe 31 is passed through the through hole 73 provided in the desiccant container 70 (the ceiling portion 72a of the hat shaped portion 72) Press-fit or expand and fix from below to 16. Thus, the desiccant container 70 is held and fixed so as to be sandwiched between the rib 33 of the outflow pipe 30 and the lower end surface of the lid member 12 (the cylindrical portion 12a thereof).
  • the desiccant container 70 is provided with the brim portion and the lower end surface of the lid member 12 (cylindrical portion 12a thereof) It may be held and fixed by being sandwiched by
  • the low-temperature low-pressure gas-liquid mixed refrigerant from the evaporator is introduced into the tank 10 via the inflow port 15, and the introduced refrigerant is contained in the desiccant container 70. It is received in the desiccant container 70 through the flow opening 81 formed in the lid-like pressing member 75, passes through the sheet-like cloth 85, the desiccant M, and the sheet-like cloth 86, and holds the plate It flows down (spills down) the desiccant container 70 through the pores 71 c formed in the member 71.
  • the refrigerant is diffused and separated into a liquid-phase refrigerant and a gas-phase refrigerant, and the liquid-phase refrigerant (including oil) flows down in the tank 10 and accumulates in the lower space of the tank 10
  • the phase refrigerant is drawn to the suction side of the compressor through the space formed between the inner pipe 31 and the outer pipe 32 in the outflow pipe 30 (gas phase refrigerant lower flow path) ⁇ the inner space of the inner pipe 31 and circulated.
  • the oil accumulated in the lower space of the tank 10 together with the liquid phase refrigerant moves to the bottom portion 13 side of the tank 10 due to the difference in specific gravity and property with the liquid phase refrigerant, and the compressor suction side via the outflow pipe 30
  • the refrigerant is drawn into the gas phase refrigerant sucked into the air flow through the inner space of the mesh filter 45 ⁇ oil return hole 35 ⁇ inner pipe 31 of the strainer 40 and returned to the compressor suction side together with the gas phase refrigerant for circulation.
  • foreign matter such as sludge is captured, and the foreign matter is removed from the circulating refrigerant (including oil).
  • the desiccant container (drying agent storage unit) 70 in which the desiccant M is accommodated is disposed below the inflow port 15 as in the accumulator 1 of the first embodiment.
  • the refrigerant is fixedly disposed opposite to the inflow port 15, and is adapted to receive the refrigerant flowing from the inflow port 15 into the tank 10 from the upper surface side (flow port 81 which is the upper surface opening) and to flow downward. During its flow, the refrigerant is separated into a liquid phase refrigerant and a gas phase refrigerant. Therefore, compared with the conventional accumulator in which the gas-liquid separator and the bag containing the desiccant are separately provided, the number of parts can be reduced, and the number of assembling processes, weight, cost and the like can be reduced.
  • the rate of moisture absorption by the desiccant M is increased, and the moisture in the refrigerant is effectively absorbed. be able to.
  • the plurality of pores 71c are formed substantially all over the plate-like holding member 71 constituting the bottom of the desiccant container 70.
  • the holes are formed to have an even distribution, but the formation position, shape, size, number and the like of the holes are not limited to the illustrated example.
  • the outer peripheral portion of the plate-like holding member 71 in order to simplify the process of processing the plate-like holding member 71, as shown in FIGS. 12A and 12B, the outer peripheral portion of the plate-like holding member 71 (in other words, the portion near the outer edge) It is also possible to form long holes 71 d of a shape along the shape (in the illustrated example, they are divided into four at equal angular intervals).
  • the box-shaped holding member 51 for holding the desiccant M from below and the plate-like holding member 71 are made of resin, and the desiccant M is used.
  • lid-like pressing members 55 and 75 held from the upper side are made of metal, materials for forming the box-like holding member 51, the plate-like holding member 71, the lid-like pressing members 55 and 75, etc. are appropriately selected. Of course to get.
  • the said 1st and 2nd embodiment employ
  • the invention can also be applied to an accumulator provided with a U-shaped outlet pipe whose side opening is located near the lower surface of the gas-liquid separator.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
PCT/JP2018/033612 2017-10-04 2018-09-11 アキュームレータ Ceased WO2019069641A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880064769.6A CN111194392B (zh) 2017-10-04 2018-09-11 储液器
EP18864711.9A EP3671074B1 (en) 2017-10-04 2018-09-11 Accumulator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017194350A JP6823865B2 (ja) 2017-10-04 2017-10-04 アキュームレータ
JP2017-194350 2017-10-04

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CN111194392A (zh) 2020-05-22
CN111194392B (zh) 2022-07-26
JP6823865B2 (ja) 2021-02-03

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