JP2011021773A - Accumulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accumulator easily assembled, reducing manufacturing costs, and keeping a stable motion without generating rattling of each component and abnormal noise even when vibration and the like is applied to the accumulator. <P>SOLUTION: This accumulator has: a bin-shaped barrel body 2 opened at its upper end; a body 3 sealing an opening end 2b of the barrel body and provided with a refrigerant inflow hole 3c and a refrigerant outflow hole 3d; a plurality of internal components 4, 6, 7, 9, ... received in the barrel body; and a coil spring 10 for vertically energizing each of the plurality of interior components inside of the barrel body. An assembly obtained by integrating the body 3, the plurality of internal components 4, 6, ... and the coil spring 10 is inserted into the barrel body 2, and the opening end 2b of the barrel body 2 is sealed by the body 3. The coil spring 10 is kept into contact with a lid 15 of a desiccant container 6 filled with a desiccant 14, and energizes the lid 15 downward. A vibration-proofing rubber 16 is disposed to control horizontal movement of a strainer 12 positioned on an internal bottom section of the barrel body among the interior components. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an accumulator, and more particularly to an accumulator that separates and stores refrigerant or the like circulating in a refrigeration cycle.

  A receiver tank, an accumulator, or the like is used to separate and store the refrigerant or the like circulating through the refrigeration cycle. For example, an accumulator described in Patent Document 1 contains a gas-liquid separator and an internal component such as a desiccant in a casing formed into a cylindrical shape by drawing in consideration of pressure resistance. Caps are fitted and welded together.

JP 2008-215727 A

  However, in the conventional accumulator, since the casing is formed into a cylindrical shape by drawing, the opening becomes narrow, and it is not easy to assemble the internal machine parts, leading to an increase in manufacturing cost. was there. In addition, many internal machine parts are accommodated in the casing, but since there is a part tolerance in each of the internal machine parts, when vibration is applied to the accumulator, a clearance occurs between the parts, There was a problem that rattling occurred in each part or abnormal noise was generated.

  Therefore, the present invention has been made in view of the problems in the conventional accumulators, etc., and can be easily assembled and reduced in manufacturing cost. Even when vibration is applied to the accumulator, It is an object of the present invention to provide an accumulator capable of maintaining stable operation without causing rattling or abnormal noise.

  In order to achieve the above object, the present invention provides a bottle-shaped body having an open upper end, a main body in which the opening end of the body is sealed and a refrigerant inflow hole and a refrigerant outflow hole are formed, and the body. An accumulator comprising: a plurality of accommodated internal machine parts; and an urging means for urging each of the multiple internal machine parts in the vertical direction inside the fuselage, the main body, and the multiple internal machines An assembly in which a part and the biasing means are integrated is inserted into the body, and the opening end of the body is sealed by the body.

  According to the present invention, an accumulator is formed by inserting an assembly into which the main body, the plurality of internal machine parts, and the urging means are integrated, and sealing the opening end of the trunk with the main body. Therefore, it is not necessary to assemble the internal parts inside the fuselage, and the accumulator can be easily assembled, so that the manufacturing cost can be reduced. In addition, since each of the multiple internal machine parts can be urged in the vertical direction inside the fuselage by the urging means, even if vibration is applied to the accumulator, it is possible to prevent a clearance from being generated between the parts. It is possible to prevent rattling and abnormal noise.

  In the above accumulator, the urging means may be configured to abut against a lid of a desiccant container filled with a desiccant and urge the lid downward. As a result, even when the amount of the desiccant filled in the desiccant container changes, the position of the lid can be changed following the amount of the desiccant to prevent the movement of the desiccant due to vibration or the like. It is possible to prevent the desiccant from being pulverized and the generation of abnormal noise.

  Further, in the accumulator, the biasing means is configured to abut a part of a shaft-shaped part extending in the vertical direction as one of the internal machine parts and bias the shaft-shaped part downward. can do. As a result, in an accumulator that does not include a desiccant, it is possible to prevent rattling of internal machine parts and generation of abnormal noise.

  The accumulator may be configured to include a regulating unit that regulates horizontal movement of the internal machine parts located on the inner bottom surface of the fuselage among the internal machine parts. As a result, even when horizontal vibration or the like is applied to the accumulator, it is possible to prevent a clearance from being generated between the internal machine parts, and to prevent rattling and abnormal noise.

  The accumulator is provided below the main body with a swivel portion that applies centrifugal force to the refrigerant flowing in from the refrigerant inflow hole to separate the refrigerant into a gas refrigerant and a liquid refrigerant, and the main body includes the fuselage in the fuselage. A protrusion that protrudes toward the bottom surface is provided, and the swivel portion can be caulked and fixed at the lowermost portion of the protrusion of the main body. As a result, even when the swivel part is made of resin or the like and the main body is welded to the body part, the caulking position of the swivel part made of resin is burned out because the welded part and the swaging position of the swivel part are greatly separated from each other. Can be prevented.

  As described above, according to the present invention, the assembly of the apparatus can be easily performed and the manufacturing cost can be reduced, and even when vibration or the like is applied, rattling or abnormal noise of each component does not occur, An accumulator that can maintain stable operation can be provided.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an embodiment of an accumulator according to the present invention. This accumulator 1 is roughly divided into a bottle-shaped body 2 having an open upper end, a main body 3 for sealing an upper opening of the body 2, and a body. 2, a swivel part 4 accommodated in the inside, a desiccant container 6 filled with a desiccant 14 inside, an inner pipe 7 and an outer pipe 9 extending in the vertical direction, and an oil return hole component located at the bottom of the body 2 11, a coil spring (biasing means) 10 or the like that is interposed between the internal machine parts such as the strainer 12 and the revolving part 4 and the desiccant container 6 and urges each of the internal machine parts in the vertical direction. Composed.

  As shown in FIG. 2, the body 2 is made of a metal such as an aluminum alloy, and is formed in a bottle shape in which an upper portion of a bottomed cylindrical main body 2a is opened. An upper end 2c and a bottom 2d in the vicinity of the opening 2b are In consideration of the withstand voltage, it is formed thicker than other portions. A locking hole 2e for inserting and fixing the anti-vibration rubber 16 (see FIG. 1) is formed on the inner bottom surface of the body 2, and a step 2f is formed at the upper end.

  As shown in FIG. 3, the main body 3 is made of a metal such as an aluminum alloy, and is formed in a cylindrical shape in which the upper part 3 a is cylindrical and the lower part 3 b is opened downward. A refrigerant inflow hole 3c and a refrigerant outflow hole 3d are formed in the upper part 3a. The refrigerant inflow hole 3c and the refrigerant outflow hole 3d communicate with the inner space 3e of the lower part 3b. As clearly shown in FIGS. 3D and 3E, the main body 3 has a caulking portion for caulking and fixing the inner pipe 7 (see FIG. 1) and the swivel portion 4 (see FIG. 1). 3f and 3g are projected.

  As shown in FIG. 4, the swivel part 4 is made of a synthetic resin such as PPS, the upper part 4a is formed as a large diameter part having a columnar space 4c and a spiral space 4d, and the lower part 4b is formed into a small diameter cylindrical shape. It is formed. The upper portion 4a is provided with a holding portion 4e for holding the lower portion 4b in addition to the above-described cylindrical space 4c and spiral space 4d. On the other hand, a step 4f and a rectangular opening 4g are formed in the lower part 4b. As clearly shown in FIGS. 4A and 4E, an opening 4j communicating with the columnar space 4c is formed immediately below the stepped portion 4h.

  As shown in FIG. 5, the desiccant container 6 is made of a resin, and is provided to accommodate the desiccant 14 (see FIG. 1) inside. A circular hole 6c is formed. A leg portion 6e is projected from the bottom portion 6b, and a circular hole portion 6f is formed.

  As shown in FIG. 6, the lid 15 is made of resin and is provided to press the desiccant 14 accommodated in the desiccant container 6 from above. The lid 15 includes a disk-shaped base portion 15a, and a cylindrical protrusion portion 15b and a rib 15c are erected on the base portion 15a, and a large number of circular holes 15d are formed.

  As shown in FIG. 7, the inner pipe 7 is made of a metal such as an aluminum alloy, and includes a protruding portion 7b at an upper end portion of a cylindrical main body 7a.

  As shown in FIG. 8, the outer pipe 9 is made of resin, the lower end portion 9 b of the cylindrical main body 9 a is formed in a cylindrical shape slightly larger in diameter than the main body 9 a, the flange portion 9 c at the lower end, and the upper end portion A locking portion 9d is projected.

  As shown in FIG. 9, the oil return hole constituting portion 11 is made of resin, and a bottomed cylindrical portion 11b protrudes from the upper surface of a disk-shaped base portion 11a, and three bottomed cylindrical portions 11b are provided inside the bottomed cylindrical portion 11b. The rib 11c is extended. Two protrusions 11d are formed on the outer peripheral surface of the bottomed cylindrical portion 11b, and a cylindrical protruding portion 11g is formed on the lower surface of the base portion 11a. A protrusion 11e is formed at the lower end of the protrusion 11g. An oil return hole 11f is formed in the center portion of the bottomed cylindrical portion 11b in a top view so as to penetrate the base portion 11a.

  As shown in FIG. 10, the strainer 12 is made of resin and has a ring-shaped base portion 12 a in which a circular groove portion 12 b is formed on the edge portion, and a cylindrical member 12 c disposed at the center of the base portion 12 a. It is comprised by the rib 12d for hold | maintaining the cylindrical member 12c, and the net-like part 12e which covers the opening part of the base 12a. The cylindrical member 12c is closed at the center in the vertical direction, and has a recess 12f at the bottom.

  As shown in FIG. 11, the anti-vibration rubber 16 is made of NBR or the like, and an upper portion 16a formed in a columnar shape has protrusions 16c formed on the entire circumference, and four slits 16d are formed on the lower portion 16b. Is done.

  As shown in FIG. 1, a coil spring 10 is interposed between the lower end of the swivel unit 4 and the lid 15, and the lower surface of the lid 15 and the bottom surface of the desiccant container 6 are made of tetron felt or the like. The filters 18 and 19 having a circular shape in a top view and having an eccentric hole are disposed.

  Next, a method for assembling the accumulator 1 having the above configuration will be described with reference to FIG.

  The upper end portion of the inner pipe 7 shown in FIG. 7 is inserted into the locking hole 3h (see FIG. 3D) of the main body 3, and the protruding portion 7b is caulked and fixed by the caulking portion 3f. Next, the turning part 4 (see FIG. 4) is inserted from the lower end of the inner pipe 7 from the upper part 4a side, the upper part 4a of the turning part 4 is inserted into the inner space 3e of the main body 3, and the step part 4h is caulked part 3g. Secure with caulking. Thereby, the main body 3, the inner pipe 7, and the swivel part 4 are integrated. The integrated body is referred to as an assembly A.

  9 is inserted into the groove 12b of the strainer 12 (see FIG. 10), and the anti-vibration rubber 16 (see FIG. 11) is inserted into the recess 12f of the cylindrical member 12c of the strainer 12. The upper portion 16a is inserted, the protrusion 16c is held in the recess 12f, and the oil return hole constituting portion 11, the strainer 12, and the vibration isolating rubber 16 are integrated. The integrated body is referred to as an assembly B.

  After assembling the outer pipe 9 to the assembly B, the desiccant container 6 is inserted and assembled from the upper end of the outer pipe 9 to obtain an assembly C. At this time, the protrusion 11h of the oil return hole constituting portion 11 is fitted into the recess 6g of the desiccant container 6 and temporarily fixed. Next, the filter 19, the desiccant 14, the filter 18, the lid 15, and the coil spring 10 are sequentially assembled to the assembly C to obtain an assembly D. The outer pipe 9 of the assembly D is assembled to the swivel portion 4 of the assembly A (the main body 3, the inner pipe 7 and the swivel portion 4 are integrated) to form an assembly E. At this time, the upper end portion of the outer pipe 9 is inserted into the lower portion 4b of the turning portion 4, and the engaging portion 9d of the outer pipe 9 is engaged with the opening portion 4g of the turning portion 4 to form the assembly E firmly. can do.

  The assembly E is inserted into the body 2 from the opening 2b of the body 2 from the vibration isolating rubber 16 side, and the vibration isolating rubber 16 is inserted into the locking hole 2e of the body 2 and fixed. When the lower end portion 3j of the upper portion 3a of the main body 3 is placed on the stepped portion 2f of the body 2, the turning portion 4 is biased upward and the desiccant container 6 is biased downward by the biasing force of the coil spring 10. Accordingly, the swivel unit 4 moves upward relative to the outer pipe 9, and each of the swivel unit 4 to the anti-vibration rubber 16 is accommodated in the body 2 while being urged upward or downward. Finally, the main body 3 and the turning part 4 are integrated by welding (welded part 20), and the assembly of the accumulator 1 is completed.

  As described above, in the present embodiment, after the assembly 3 of the main body 3 to the vibration isolating rubber 16 is formed, the assembly E is inserted into the body 2 from the opening 2b of the body 2 and the vibration isolating rubber is inserted. By inserting 16 into the locking hole 2e of the fuselage 2 and fixing it, all the internal machine parts can be accommodated in the fuselage 2 at the same time, so even if the opening 2b of the fuselage 2 is narrow Therefore, it is possible to easily insert the internal machine parts, leading to a reduction in manufacturing cost.

  Further, when the swivel portion 4 is fixed to the main body 3, the stepped portion 4h of the swivel portion 4 is caulked and fixed by the caulking portion 3g located at the lower end of the lower portion 3b of the main body 3. Since the inner diameter side surface and the top surface of the space 3e are not in contact with the outer diameter side surface of the upper portion 4a of the swivel portion 4, the distance from the welded portion 20 to the stepped portion 4h (the stepped portion from the welded portion 20 through the main body 3). Since the distance related to the conduction of welding heat to the portion 4h can be increased, it is possible to prevent the stepped portion 4h (caulking portion) of the resin turning portion 4 from being burned out.

  Next, the operation of the accumulator 1 having the above configuration will be described with reference to FIG. In the following description, the accumulator 1 is disposed between the evaporator and the compressor of the refrigeration cycle, the refrigerant from the evaporator is separated into liquid refrigerant and gas refrigerant, and the liquid refrigerant is stored in the accumulator 1. The case where the gas refrigerant is returned to the compressor will be described as an example.

  The refrigerant from the evaporator flows into the main body 3 from the refrigerant inflow hole 3c of the main body 3 in FIG. 1, and then is guided to the swivel unit 4 and moves from the spiral space 4d shown in FIG. 4 to the cylindrical space 4c. Then, it is converted into a swirl flow, and is separated into a liquid refrigerant and a gas refrigerant by centrifugal separation using the swirl flow.

  The separated liquid refrigerant and the compressor oil (hereinafter referred to as “oil”) contained in the refrigerant flow into the body 2 from the opening 4j shown in FIG. At the same time, the liquid refrigerant and the oil are separated, and the oil is stored below the liquid refrigerant. The liquid refrigerant accumulated in the lower part of the body 2 is dried by the desiccant 14 in the desiccant container 6.

  On the other hand, the separated gas refrigerant passes through the inside of the outer pipe 9 from the cylindrical space 4c of the swivel part 4 and once reaches the lower end of the outer pipe 9, and then supplies oil from the oil return hole 11f of the oil return hole constituting part 11. It is turned upward while sucking and flows through the inner pipe 7, and the gas refrigerant containing oil is discharged from the refrigerant outflow hole 3 d of the main body 3 and returns to the compressor.

  Further, the foreign matter contained in the refrigerant flowing into the accumulator 1 reaches the bottom of the body 2 through the same route as the liquid refrigerant and is captured by the mesh portion 12e of the strainer 12. Therefore, the foreign matter is not guided into the outer pipe 9, and the foreign matter can be prevented from entering the compressor.

  Even when vibration is applied to the accumulator 1 during the above-described operation, each component housed in the body 2 is biased upward or downward by the coil spring 10, so that a clearance is generated between the components. Therefore, it is possible to prevent the rattling and abnormal noise of each part.

  Even when the amount of the desiccant 14 filled in the desiccant container 6 changes during the above operation, the lid 15 is urged downward by the coil spring 10, so that the position of the lid 15 is set to the position of the desiccant 14. The amount can be changed in accordance with the amount, the movement of the desiccant 14 due to vibration or the like can be prevented, and the powdering of the desiccant 14 and the generation of abnormal noise can be prevented.

  Further, since the vibration isolator 16 is attached to the strainer 12 located on the inner bottom surface of the fuselage 2 and the anti-vibration rubber 16 is engaged with the locking hole 2 e of the fuselage 2, the accumulator 1 is subjected to horizontal vibration and the like. Even when added, there is no clearance between the components, and it is possible to prevent rattling or abnormal noise between the components.

  In the above embodiment, the horizontal direction of the accumulator 1 is suppressed by inserting and engaging the upper portion 16a of the vibration isolation rubber 16 in the recess 12f of the cylindrical member 12c of the strainer 12. The accumulator 31 shown in FIG. 12 prevents a protrusion 33 from standing on the inner bottom surface of the body 2 in place of the locking hole 2 e (see FIG. 2) and engages the protrusion 33 with the recess 32 a of the strainer 32. By causing the vibration rubber 34 to bite in, even when vibration is applied in the horizontal direction, it is possible to prevent rattling or abnormal noise between the components without generating a clearance between the components.

  In the above-described embodiment, the coil spring 10 is used as the biasing means for biasing the plurality of internal machine parts in the vertical direction. However, the biasing means is not limited to the coil spring 10, and other elastic members are used. The body can also be used. Further, although the lid 15 of the desiccant container 6 is urged by the coil spring 10, it can be configured to urge other internal machine parts, and the lid 15 can be urged by something other than the coil spring 10. Alternatively, the lid 15 may be fixed to a predetermined position of the desiccant container 6 without urging the lid 15.

  Further, in order to restrict the movement of the internal parts in the horizontal direction, the strainer 12 is locked to the bottom of the fuselage 2 using the vibration isolating rubber 16 or the like, but the horizontal movement of the internal parts other than the strainer 12 is performed. Can also be regulated.

  Further, in the case of an accumulator that does not include a desiccant, the parts related to the storage of the desiccant such as the desiccant container 6 are deleted from the accumulator 1 shown in FIG. 1, for example, as shown in FIG. A flange portion 42 is provided in the middle portion of the (shaft-shaped part) 9, the lower end portion of the coil spring 10 is brought into contact with the upper surface of the flange portion 42, and the flange portion 42 is biased downward to lower the entire outer pipe 9 downward. Thus, in the accumulator 41 that does not include the desiccant container, it is possible to prevent rattling of internal machine parts and generation of abnormal noise. The flange portion 42 may be formed integrally with the outer pipe 9, or a member separate from the outer pipe 9 may be fixed to the outer pipe 9.

The accumulators 1, 31, 41 having the above-described configuration have a body 2 formed into a cylindrical shape by drawing processing in consideration of pressure resistance, and therefore are particularly preferably used as a refrigeration cycle for a car air conditioner using CO ₂ as a refrigerant. However, it is of course possible to use the accumulators 1 and 31 in a general refrigeration cycle using a refrigerant other than CO ₂ .

It is sectional drawing which shows one Embodiment of the accumulator concerning this invention. It is sectional drawing of the fuselage | body of the accumulator shown in FIG. It is a figure which shows the main body of the accumulator shown in FIG. 1, (a) is a top view, (b) is the sectional view on the AA line of (a), (c) is a bottom view, (d) is (b) (B) is an enlarged view of part B, (e) is an enlarged view of part C of (b). It is a figure which shows the turning part of the accumulator shown in FIG. 1, (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is an E arrow view of (b), (E) is a sectional view taken along the line CC of (a), (f) is a sectional view taken along the line BB of (b), (g) is a sectional view taken along the line AA of (b), and (h) is ( It is the FF sectional view taken on the line of a). It is a figure which shows the desiccant container of the accumulator shown in FIG. 1, (a) is a bottom view, (b) is the sectional view on the AA line of (a). It is a figure which shows the lid | cover of the accumulator shown in FIG. 1, Comprising: (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is the sectional view on the AA line of (b). It is. It is a partial cross section figure which shows the inner pipe of the accumulator shown in FIG. It is a figure which shows the outer pipe of the accumulator shown in FIG. 1, (a) is a front view, (b) is a top view, (c) is a bottom view, (d) is a top side view, (e) is ( (a) AA sectional view, (f) is the B section enlarged view of (a), (g) is the C section enlarged view of (b). It is a figure which shows the oil return hole structure part of the accumulator shown in FIG. 1, (a) is a front view, (b) is a top view, (c) is the sectional view on the AA line of (b), (d ) Is an enlarged view of part B of (a). It is a figure which shows the strainer of the accumulator shown in FIG. 1, Comprising: (a) is a top view, (b) is the sectional view on the AA line of (a), (c) is a bottom view. It is a figure which shows the vibration isolator of the accumulator shown in FIG. 1, Comprising: (a) is a front view, (b) is a bottom view. It is a figure which shows other embodiment of the accumulator concerning this invention, Comprising: It is sectional drawing which shows the bottom part of a fuselage | body. It is a whole sectional view showing other embodiments of the accumulator concerning the present invention.

1 accumulator 2 body 2a main body 2b opening 2c upper end 2d bottom 2e locking hole 2f step 3 main body 3a upper 3b lower 3c refrigerant inflow hole 3d refrigerant outflow hole 3e inner space 3f caulking part 3g caulking part 3h locking hole 3j ( Lower end 4 of upper part 4 Turning part 4a Upper part 4b Lower part 4c Cylindrical space 4d Helical space 4e Holding part 4f Step part 4g Opening part 4h Step part 4j Opening part 6 Desiccant container 6a Main body 6b Bottom part 6c Circular hole 6d Opening part 6e Leg portion 6f Hole portion 6g Recess 7 Inner pipe 7a Main body 7b Protruding portion 9 Outer pipe 9a Main body 9b Lower end portion 9c Flange portion 9d Locking portion 10 Coil spring 11 Oil return hole constituting portion 11a Base portion 11b Bottomed cylindrical portion 11c Rib 11d Protrusion Ridge 11e ridge 11f oil return hole 11g protrusion 11h protrusion 12 strainer 12a base 12b groove 12c Cylindrical member 12d Rib 12e Net part 12f Recess 14 Desiccant 15 Lid 15a Base 15b Protrusion 15c Rib 15d Circular hole 16 Anti-vibration rubber 16a Upper part 16b Lower part 16c Projection 16d Slit 18 Filter 19 Filter 20 Welding part 31 Accumulator 32 Strainer 32a Recess 33 Projection 34 Anti-vibration rubber 41 Accumulator 42 Flange

Claims (5)

  A bottle-shaped body whose upper end is open, a main body which seals the opening end of the body and has a coolant inflow hole and a coolant outflow hole, a plurality of internal machine parts housed in the body, An accumulator comprising a biasing means for biasing each of a plurality of internal machine parts in the vertical direction inside the body, wherein the main body, the plurality of internal machine parts, and the biasing means are integrated. An accumulator comprising: inserting the assembled assembly into the body and sealing the open end of the body with the main body.   The accumulator according to claim 1, wherein the urging means abuts on a lid of a desiccant container filled with a desiccant inside and urges the lid downward.   2. The urging means abuts on a part of a shaft-like part extending in the vertical direction as one of the internal machine parts, and urges the shaft-like part downward. The accumulator described.   The accumulator according to claim 1, 2 or 3, further comprising a restriction means for restricting horizontal movement of an internal machine part located on an inner bottom surface of the fuselage among the internal machine parts.   A swivel unit is provided below the main body to apply centrifugal force to the refrigerant flowing from the refrigerant inflow hole to separate the refrigerant into a gas refrigerant and a liquid refrigerant, and the main body moves toward the bottom surface of the fuselage. The accumulator according to any one of claims 1 to 4, further comprising a protruding portion that protrudes, wherein the swivel portion is fixed by caulking at a lowermost portion of the protruding portion of the main body.

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