JP2010085060A - Accumulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance a heat insulation function by using an air heat insulation layer, and to improve assembling performance. <P>SOLUTION: This accumulator is equipped with a cylindrical tank 11 separating an inflow coolant into gas and liquid, storing the liquid coolant, and sending out the gaseous coolant, a cylindrical holder 12 disposed coaxially with the tank 11 and covering an outer circumference face of the tank 11, and two ring-like members 13, 14 fit on the outer circumference face of the tank 11 and interposed between the outer circumference face of the tank 11 and an inner circumference face of the holder 12. The holder 12 is formed of a plurality of divided members 12a, 12b divided along the axial direction of the tank 11, the two ring-like members 13, 14 are disposed separated from each other in the axial direction of the tank 11, the air heat insulation layer 15 blocked by the two ring-like members 13, 14 is formed between the outer circumference face of the tank 11 and the inner circumference face of the holder 12, and the two ring like members 13, 14 function as sealing members sealing the air heat insulation layer 15. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an accumulator used in a refrigeration cycle.

  Conventionally, this type of accumulator is described in Patent Document 1. In this prior art, a cylindrical tank that separates the gas-liquid refrigerant, stores the liquid refrigerant, and flows out the gaseous refrigerant is accommodated coaxially in a rubber cylindrical container.

  The cylindrical container is formed in a bottomed cylindrical shape having an open end. Further, the cylindrical container has a plurality of protrusions formed from the inner periphery to the bottom thereof, and the tank is accommodated in the cylindrical container while being supported by the plurality of protrusions.

According to this, since the tank is supported by the plurality of protrusions inside the cylindrical container, an air heat insulating layer (gap) is formed between the outer peripheral surface of the tank and the inner peripheral part and the bottom of the cylindrical container, This air insulation layer can exert a heat insulation function.
Japanese Patent Laid-Open No. 10-300283

  However, in the above prior art, since the one end side of the cylindrical container is open, the air heat insulating layer is opened to the outside on the one end side of the cylindrical container. For this reason, there exists a problem that the heat insulation function by an air heat insulation layer cannot fully be exhibited.

  In addition, the cylindrical container is made of rubber having a large friction coefficient, but the tank is supported by a plurality of protrusions formed from the inner peripheral part to the bottom part of the cylindrical container. As a result, there is a problem that a large insertion force is required when the tank is inserted into the cylindrical container, resulting in poor assembly.

  In view of the above points, an object of the present invention is to improve the heat insulating function by the air heat insulating layer and improve the assemblability.

In order to achieve the above object, in the invention described in claim 1, a cylindrical tank (11) that separates the gas-liquid of the inflowing refrigerant, stores the liquid refrigerant, and flows out the gas refrigerant,
A cylindrical holder (12) disposed coaxially with the tank (11) and covering the outer peripheral surface of the tank (11);
Two ring-shaped members (13, 14) fitted on the outer peripheral surface of the tank (11) and interposed between the outer peripheral surface of the tank (11) and the inner peripheral surface of the holder (12),
The holder (12) is formed of a plurality of divided members (12a, 12b) divided along the axial direction of the tank (11).
The two ring-shaped members (13, 14) are spaced apart from each other in the axial direction of the tank (11),
Between the outer peripheral surface of the tank (11) and the inner peripheral surface of the holder (12), an air heat insulating layer (15) closed by two ring-shaped members (13, 14) is formed,
The two ring-shaped members (13, 14) are characterized by functioning as sealing members for sealing the air heat insulating layer (15).

  According to this, since the air heat insulation layer (15) can be sealed by the two ring-shaped members (13, 14), the heat insulation function by the air heat insulation layer (15) can be improved.

  Further, since the ring-shaped members (13, 14) having a small contact area with the outer peripheral surface of the tank (11) are fitted to the outer peripheral surface of the tank (11), they are necessary when assembling the ring-shaped members (13, 14). The force is small (see FIG. 2B described later).

  Furthermore, since the holder (12) is formed of a plurality of divided members (12a, 12b) divided along the axial direction of the tank (11), the holder (12) is removed from the outer peripheral side of the tank (11). It can assemble | attach and can avoid that a frictional force generate | occur | produces between ring-shaped members (13, 14) when assembling a holder (12). As a result, the assemblability can be improved.

  In the present invention, “divided along the axial direction of the tank (11)” does not mean only dividing along the same direction as the axial direction of the tank (11). In the range in which the holder (12) can be assembled from the outer peripheral side of the tank (11), the holder (12) is meant to be divided along a direction slightly inclined with respect to the axial direction of the tank (11). is there.

  The invention according to claim 2 is characterized in that, in the accumulator according to claim 1, the two ring-shaped members (13, 14) also function as vibration-proof members for preventing vibration of the tank (11). To do.

  Thereby, compared with the case where the vibration isolator which prevents the vibration of a tank (11) is provided separately from a ring-shaped member (13, 14), a number of parts can be reduced and cost can be reduced.

  According to a third aspect of the present invention, in the accumulator according to the first aspect, at least one of the plurality of divided members (12a, 12b) is a vibration isolating portion (12f) for preventing vibration of the tank (11). It is characterized by having.

  According to this, since the holder (12) exhibits a vibration isolating function, the ring-shaped members (13, 14) need only exhibit a sealing function. For this reason, as compared with the case where the ring-shaped members (13, 14) exhibit both the sealing function and the vibration-proof function, a material having better sealing properties is selected as the material of the ring-shaped members (13, 14). be able to.

  As a result, the sealing performance of the air heat insulation layer (15) can be improved, and the heat insulation function by the air heat insulation layer (15) can be further improved.

  According to a fourth aspect of the present invention, in the accumulator according to any one of the first to third aspects, a tank that is in axial contact with the ring-shaped members (13, 14) is provided on the outer peripheral surface of the tank (11). Side projections (11a, 11b) are formed.

  According to this, since the ring-shaped members (13, 14) can be positioned at predetermined positions in the tank axial direction by the tank side protrusions (11a, 11b), the assemblability can be further improved.

  According to a fifth aspect of the present invention, in the accumulator according to any one of the first to fourth aspects, on the inner peripheral surface of the holder (12), the holder side that abuts the ring-shaped member (14) in the axial direction. A protrusion (12c) is formed.

  According to this, since the holder (12) can be positioned at a predetermined position in the tank axial direction by the holder side protrusion (12c), the assemblability can be further improved.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
FIG. 1 is an overall configuration diagram of a refrigeration cycle of a vehicle air conditioner to which the accumulator of the first embodiment is applied. A compressor 1 that sucks and compresses refrigerant is rotationally driven by a vehicle travel engine (not shown) via a pulley 2 and a belt.

  The compressor 1 can be a variable capacity compressor that can adjust the refrigerant discharge capacity by changing the discharge capacity, or a fixed capacity type compressor that adjusts the refrigerant discharge capacity by changing the operating rate of the compressor operation by switching the electromagnetic clutch. Any of the machines may be used. Further, if an electric compressor is used as the compressor 1, the refrigerant discharge capacity can be adjusted by adjusting the rotational speed of the electric motor.

  The high-pressure gaseous refrigerant discharged from the compressor 1 flows into the condenser 3, where it is cooled and condensed by exchanging heat with the outside air. Next, the liquid refrigerant condensed in the condenser 3 is decompressed to a low pressure by the decompression device 4 to be in a mist-like gas-liquid two-phase state. The pressure reducing device 4 is composed of a fixed throttle such as an orifice and a nozzle, or an appropriate variable throttle.

  The decompressed low-pressure refrigerant is evaporated in the evaporator 5 by absorbing heat from air blown from an air-conditioning blower (not shown). The evaporator 5 is disposed in an air conditioning case (not shown), and the cold air cooled by the evaporator 5 is adjusted in temperature by a heater core (not shown) and then blown out into the passenger compartment. The refrigerant that has passed through the evaporator 5 is separated into gas and liquid by the accumulator 10 and then sucked into the compressor 1.

  The accumulator 10 plays a role of separating the gas-liquid refrigerant from the outlet of the evaporator 5, storing the liquid refrigerant, and sucking the gas refrigerant into the compressor 1. The accumulator 10 also serves to cause the compressor 1 to suck oil dissolved in the liquid refrigerant that accumulates on the tank bottom side.

  2A is a perspective view schematically showing the accumulator 10, and FIG. 2B is a cross-sectional view of FIG. In FIG. 2, the up and down arrows indicate the up and down direction in the vehicle mounted state.

  The accumulator 10 is arranged in a coaxial manner with a cylindrical tank 11 that separates the gas-liquid of the inflowing refrigerant, stores the liquid refrigerant, and flows out the gas refrigerant, and is disposed coaxially with the tank 11 (hereinafter referred to as the tank outer circumferential surface). )) And two ring-shaped members fitted between the tank outer peripheral surface and interposed between the tank outer peripheral surface and the inner peripheral surface of the holder 12 (hereinafter referred to as the holder inner peripheral surface). 13 and 14.

  The tank 11 is formed in a hollow cylindrical shape using a metal material such as aluminum. In FIG. 2, for the convenience of illustration, only the outer shape of the tank 11 is shown. The tank 11 is attached to the vehicle body side of the vehicle so that its axial direction (hereinafter referred to as the tank axial direction) is substantially parallel to the vertical direction (gravity direction).

  Although not shown in FIG. 2, an inlet 10a (FIG. 1) for sucking refrigerant from the outlet of the evaporator 5 and an outlet 10b (FIG. 1) for discharging the gaseous refrigerant to the compressor 1 inlet side are provided. It is formed on the upper surface of the tank 11.

  The holder 12 is formed in a cylindrical shape whose both ends are open, and can be formed of, for example, resin. In the example of FIG. 2, the holder 12 is formed by connecting two semi-cylindrical divided members 12 a and 12 b that are divided and formed along the tank axial direction by appropriate connecting means such as screwing. The holder 12 may be divided into three or more divided members along the tank axial direction.

  Incidentally, “dividing along the tank axial direction” does not mean dividing only along the direction exactly the same as the tank axial direction. The holder 12 can be assembled from the outer peripheral side of the tank 11. Within the possible range, it is meant to include division along a direction slightly inclined with respect to the tank axial direction.

  The two ring-shaped members 13 and 14 are disposed at the upper and lower portions of the tank 11 so as to be separated from each other in the tank axial direction. An air heat insulating layer 15 is formed between the outer peripheral surface of the tank and the inner peripheral surface of the holder and is closed by the two ring-shaped members 13 and 14. In the example of FIG. 2, the two ring-shaped members 13 and 14 have the same shape, but need not necessarily have the same shape.

  On the outer peripheral surface of the tank, there are formed tank-side protrusions 11a and 11b that abut the ring-shaped members 13 and 14 in the tank axial direction. The tank side protrusions 11a and 11b serve to position the ring-shaped members 13 and 14 at predetermined positions in the tank axial direction.

  On the inner peripheral surface of the holder, a holder-side protrusion 12c that abuts the ring-shaped member 14 in the tank axial direction is formed. The holder-side protrusion 12c serves to position the holder 12 at a predetermined position in the tank axial direction.

  In the example of FIG. 2, the tank side protrusions 11a and 11b and the holder side protrusion 12c are formed annularly over the entire circumference of the tank outer peripheral surface, but the tank side protrusions 11a and 11b and the holder side protrusion 12c are connected to the tank. You may form partially in a part of outer peripheral surface.

  Next, the outline of the assembly procedure of the accumulator 10 will be described with reference to FIG. First, as shown to Fig.3 (a), the ring-shaped members 13 and 14 are fitted to a tank outer peripheral surface from a tank axial direction both ends side. At this time, since the ring-shaped members 13 and 14 are in contact with the tank side protrusions 11a and 11b in the tank axial direction, the ring-shaped members 13 and 14 are positioned at predetermined positions in the tank axial direction.

  Next, as shown in FIG. 3B, the two divided members 12 a and 12 b are assembled from the outer peripheral side of the tank 11 to the tank 11 in which the ring-shaped members 13 and 14 are fitted. Thereby, the ring-shaped members 13 and 14 are sandwiched between the tank outer peripheral surface and the holder inner peripheral surface, and the tank outer peripheral surface is covered with the holder 12. At this time, the holder-side protrusion 12c contacts the ring-shaped member 14 in the tank axial direction, so that the holder 12 is positioned at a predetermined position in the tank axial direction.

  According to the present embodiment, since the ring-shaped members 13 and 14 having sealing properties are sandwiched between the tank outer peripheral surface and the holder inner peripheral surface, the air insulation formed between the tank outer peripheral surface and the holder inner peripheral surface. The layer 15 is sealed (sealed) by the ring-shaped members 13 and 14. In other words, the ring-shaped members 13 and 14 function as seal members that seal the air heat insulating layer 15. For this reason, the heat insulation function by the air heat insulation layer 15 can be improved.

  Further, as can be seen from FIG. 2B, the contact area between the ring-shaped members 13 and 14 and the outer peripheral surface of the tank is small. The power is small.

  In addition, since the holder 12 is formed by two divided members 12a and 12b and is assembled from the outer peripheral side of the tank 11, a frictional force is generated between the ring-shaped members 13 and 14 when the holder 12 is assembled. Does not occur. As a result, the assembling property of the accumulator 10 can be improved.

  Furthermore, the ring-shaped members 13 and 14 can be positioned at a predetermined position in the tank axial direction by the tank side protrusions 11a and 11b, and the holder 12 can be positioned at a predetermined position in the tank axial direction by the holder side protrusion 12c. Since it can do, the assembly property of the accumulator 10 can be improved more.

  Further, since the ring-shaped members 13 and 14 have vibration-proof properties, the ring-shaped members 13 and 14 also function as vibration-proof members that prevent the tank 11 from vibrating. For this reason, compared with the case where the vibration isolating member of the tank 11 is provided separately from the ring-shaped members 13 and 14, the number of parts can be reduced and the cost can be reduced.

(Second Embodiment)
As shown in FIG. 4, the second embodiment is provided with a vehicle attachment structure for attaching the accumulator 10 to the vehicle body side of the first embodiment.

  In the example of FIG. 4, a resin-made bracket 12d is integrally formed on one of the two divided members 12a and 12b, and the bolt insertion hole 12e formed on the bracket 12d and the vehicle body wall surface 20 are formed. The accumulator 10 is fixed to the vehicle body side of the vehicle by inserting bolts 21 into bolt insertion holes (not shown) and fastening them with nuts 22.

  Thereby, the vehicle attachment of the accumulator 10 can be performed easily. The bracket 12d may be provided on the other divided member 12a of the two divided members 12a and 12b, or the bracket 12d may be provided on both of the two divided members 12a and 12b.

(Third embodiment)
As shown in FIG. 5, the third embodiment is provided with an anti-vibration part 12 f having anti-vibration properties in the bracket 12 d as compared with the second embodiment, so that the holder 12 can prevent vibration of the tank 11. It functions as a vibration member.

  The anti-vibration part 12f is formed of rubber or the like having excellent anti-vibration properties, and for example, can be molded in two colors integrally with the bracket 12d. Alternatively, the vibration isolator 12f may be formed separately from the bracket 12d, and the vibration isolator 12f may be sandwiched between the bracket 12d and the vehicle body wall surface 20 and fastened with the bolt 21 and the nut 22.

  According to this, since the holder 12 exhibits a vibration isolating function, the ring-shaped members 13 and 14 only need to exhibit a sealing function. For this reason, compared with the said 2nd Embodiment which makes the ring-shaped members 13 and 14 exhibit both a sealing function and an anti-vibration function, the material which was more excellent in the sealing performance is selected as a material of the ring-shaped members 13 and 14. be able to.

  As a result, the sealing property (sealing property) of the air heat insulating layer 15 can be improved, and thus the heat insulating function by the air heat insulating layer 15 can be further improved.

(Other embodiments)
In each of the above embodiments, the tank 11 and the holder 12 are formed in a cylindrical shape, and the ring-shaped members 13 and 14 are formed in an annular shape. However, the present invention is not limited to this, and the tank 11 and the holder 12 are formed. May be formed in a cylindrical shape other than a cylindrical shape, and the ring-shaped members 13 and 14 may be formed in an annular shape other than an annular shape.

  In each of the above embodiments, an example in which the accumulator of the present invention is applied to a refrigeration cycle of a vehicle air conditioner has been described. However, the present invention is not limited to this, and various other types such as a refrigeration cycle of a stationary air conditioner can be used. The accumulator of the present invention can be applied to a refrigeration cycle.

It is a block diagram of the refrigerating cycle to which the accumulator in 1st Embodiment of this invention is applied. (A) is a single-piece | unit perspective view of the accumulator of FIG. 1, (b) is sectional drawing of (a). It is explanatory drawing which shows the outline | summary of the assembly procedure of the accumulator of FIG. (A) is a disassembled perspective view of the accumulator in 2nd Embodiment, (b) is a perspective view which shows the vehicle attachment state of the accumulator of (a). (A) is a disassembled perspective view of the accumulator in 3rd Embodiment, (b) is a perspective view which shows the vehicle attachment state of the accumulator of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Tank 11a, 11b Tank side protrusion part 12 Holder 12a, 12b Dividing member 12c Holder side protrusion part 13, 14 Ring-shaped member 15 Air heat insulation layer

Claims (5)

A cylindrical tank (11) that separates the gas-liquid of the inflow refrigerant, stores the liquid refrigerant, and flows out the gas refrigerant;
A cylindrical holder (12) disposed coaxially with the tank (11) and covering the outer peripheral surface of the tank (11);
Two ring-shaped members (13, 14) fitted on the outer peripheral surface of the tank (11) and interposed between the outer peripheral surface of the tank (11) and the inner peripheral surface of the holder (12),
The holder (12) is formed of a plurality of divided members (12a, 12b) divided along the axial direction of the tank (11),
The two ring-shaped members (13, 14) are spaced apart from each other in the axial direction of the tank (11),
Between the outer peripheral surface of the tank (11) and the inner peripheral surface of the holder (12), an air insulation layer (15) closed by the two ring-shaped members (13, 14) is formed,
The two ring-shaped members (13, 14) function as seal members for sealing the air heat insulation layer (15).   The accumulator according to claim 1, wherein the two ring-shaped members (13, 14) also function as vibration-proof members for preventing vibration of the tank (11).   The at least one of the plurality of divided members (12a, 12b) has a vibration isolating portion (12f) for preventing vibration of the tank (11). accumulator.   The tank-side protrusion (11a, 11b) that contacts the ring-shaped member (13, 14) in the axial direction is formed on the outer peripheral surface of the tank (11). The accumulator according to any one of 3.   The holder (12) is formed with a holder-side protrusion (12c) in contact with the ring-shaped member (14) in the axial direction on the inner peripheral surface of the holder (12). An accumulator according to claim 1.

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