JP5663219B2 - Refrigerant tank - Google Patents

Description

  The present invention relates to a refrigerant tank such as an accumulator or a receiver tank that separates and stores a refrigerant or the like circulating in a refrigeration cycle.

  An accumulator, a receiver tank, or the like is used to separate and store the refrigerant circulating in the refrigeration cycle. For example, Patent Document 1 includes a tank body 31 including a lower tank 32 and an upper tank 33 provided with a refrigerant inlet 34 and a refrigerant outlet 35, as shown in FIG. A gas-liquid separation plate 36 that gas-liquid separates the refrigerant that has flowed from the refrigerant inlet 34 into the main body 31, a bag 37 that contains a desiccant (moisture absorbent), and a refrigerant outlet that removes the gas-liquid separated and absorbed moisture. An accumulator 30 in which a refrigerant outlet pipe (inner pipe) 38 leading to 35 is disposed is described.

  In this accumulator 30, as shown in FIG. 9, a pair of through holes 41, 42 are formed in the central portion of the bag 37, and the refrigerant outlet pipe 38 is inserted into these through holes 41, 42, thereby The position of the bag 37 is fixed. According to this configuration, since a dedicated member for fixing the bag 37 is not required, the number of parts can be reduced, and the refrigerant outlet pipe 38 is simply inserted into the through holes 41 and 42 of the bag 37. As a result, the bag 37 can be easily attached.

  In the accumulator 30, as shown in FIG. 8, an oil return hole 39 is provided in the bottom pipe portion 38 a of the refrigerant outlet pipe 38, and a strainer 40 is attached so as to cover the oil return hole 39. The strainer 40 is provided to prevent foreign matters in the oil from flowing into the refrigerant outlet pipe 38 and is formed in a cylindrical shape.

JP 2003-121031 A

  However, in the accumulator 30 described in Patent Document 1, since the refrigerant outlet pipe 38 is inserted into the through holes 41 and 42 formed in the central portion of the bag 37, the bag 37 is, as shown in FIG. It is suspended from the refrigerant outlet pipe 38 in a folded state with the central portion as a fold, and is disposed so as to cover the strainer 40. For this reason, when the accumulator 30 is shaken and the bag 37 moves, there is a problem that the bag 37 is damaged by contacting and rubbing against the corner portion 40a (see FIG. 8A) of the strainer 40.

  Accordingly, the present invention has been made in view of the above-described problems in the prior art, and a refrigerant tank capable of preventing the bag from being damaged while simplifying the mounting of the bag and reducing the number of parts. The purpose is to provide.

In order to achieve the above object, the present invention provides a refrigerant tank having a tank main body provided with a refrigerant inflow hole and a refrigerant outflow hole, and one end connected to the refrigerant outflow hole. comprising a refrigerant outlet pipe U-shaped that is, the bag containing the drying agent is disposed in the tank body, the bag includes a storage portion for storing the drying agent, adjacent the housing portion and a formed extension, the receiving portion is disposed between the side tube portion opposite the refrigerant outlet pipe, to the extended portion, the insertion portion is provided for inserting the bottom tube portion of the refrigerant outlet pipe The bag is formed by folding the cloth member in half or overlapping the cloth members of the same shape, and the storage portion is in a region of the cloth member in the folded state or in a part of the overlapped cloth member. The cloth member is joined so as to close the periphery, and the extension Parts are in the remaining area of the fabric member or superimposed state of the fabric member in a state in which the clamshell, characterized in that the lower end of at least the fabric member is formed by a non-bonded.

  And according to this invention, while forming an extension part adjacent to the accommodating part which accommodates a desiccant, and providing the insertion part which penetrates a refrigerant | coolant exit pipe | tube in this extension part, simplification of attachment of a bag and components It is possible to prevent breakage of the bag while reducing the score.

  The said refrigerant | coolant tank WHEREIN: The said insertion part can be comprised by a pair of through-hole.

  In the refrigerant tank, a member that is convex with respect to the surface of the refrigerant outlet pipe is attached to the refrigerant outlet pipe, and the refrigerant outlet pipe is inserted so that the member is positioned between the pair of through holes. be able to.

  In the refrigerant tank, the tank body may include a bottomed cylindrical body having an open upper end, and a header that is provided with the refrigerant inflow hole and the refrigerant outflow hole and seals the open end of the body. .

  As described above, according to the present invention, it is possible to prevent the bag from being damaged while simplifying the attachment of the bag and reducing the number of parts.

It is sectional drawing which shows the accumulator as one Embodiment of the refrigerant | coolant tank concerning this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a figure which shows the bag of FIG. 1, (a) is the front view of the state which made a part cross section, (b) is the side view shown in the state which is not cross-sectionalized. (A) is CC sectional view taken on the line of FIG. 1, (b) is a figure which shows the state before mounting | wearing with a strainer and an attachment clip in (a). It is a figure which shows the other example of a bag, (a) is the front view of the state which made a part cross section, (b) is the side view shown in the state which is not cross-sectionalized. It is the figure which showed the state which has arrange | positioned the bag of FIG. 6 in the trunk | drum in the cross section equivalent to CC line of FIG. It is a figure which shows an example of the conventional refrigerant | coolant tank, (a) is sectional drawing, (b) is the GG sectional view taken on the line of (a). It is a top view which shows the bag of FIG.

  Next, an embodiment for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an accumulator as an embodiment of a refrigerant tank according to the present invention. The accumulator 1 is roughly divided into a cylindrical tank body 2 closed at both ends, and a refrigerant disposed in the tank body 2. It consists of an outlet pipe (inner pipe) 5 and a bag 6. The tank body 2 and the refrigerant outlet pipe 5 are made of, for example, a metal such as an aluminum alloy, and the bag 6 is made of, for example, a plastic nonwoven fabric.

  The tank body 2 includes a bottomed cylindrical body 3 having an open upper end, and a disk-shaped header 4 that is welded to the body 3 via a welded portion 9 and seals the opening end of the body 3. The

  As shown in FIGS. 1 and 2, the ceiling surface (lower surface) 4 a of the header 4 has first and second convex portions 4 b and 4 c having a substantially bowl shape in plan view, and a third projection having a substantially trapezoidal shape in plan view. The part 4d is provided in a projecting manner. The first convex portion 4b is provided with a refrigerant inflow hole 7 for guiding the refrigerant into the body 3, and the second convex portion 4c is a refrigerant for discharging the refrigerant from which moisture has been removed. An outflow hole 8 is formed.

  One end portion 5a of the refrigerant outlet pipe 5 bent into a substantially U shape is inserted below the second convex portion 4c, whereby the refrigerant outlet hole 8 and the refrigerant outlet pipe 5 are connected. The other end portion 5 b of the refrigerant outlet pipe 5 is sandwiched between the first convex portion 4 b and the third convex portion 4 d in a state where a gap 10 is formed between the refrigerant outlet pipe 5 and the ceiling surface 4 a of the header 4.

  An oil return hole 11 is formed in the bottom pipe portion 5 c of the refrigerant outlet pipe 5 for guiding compressor oil (hereinafter referred to as “oil”) accumulated at the bottom of the body 3 into the refrigerant outlet pipe 5. A strainer 12 is disposed so as to cover the oil return hole 11. The strainer 12 is provided to prevent foreign matters in the oil from flowing into the refrigerant outlet pipe 5, and is fixed to the bottom pipe portion 5c of the refrigerant outlet pipe 5 by an attachment clip 13, as shown in FIG. .

  Further, as shown in FIG. 1, a bag 6 containing a desiccant (hygroscopic agent) 15 is disposed inside the refrigerant outlet pipe 5 (between the opposing side pipe portions 5 d and 5 e). As shown in FIG. 4, the bag 6 includes a bag-shaped storage portion 6 a that stores the desiccant 15 inside, and a skirt-shaped extension portion 6 b that is formed adjacent to the storage portion 6 a and extends downward. And a pair of through holes 6c and 6d having a diameter substantially the same as the outer diameter of the refrigerant outlet pipe 5 are formed in the extension portion 6b.

  As shown in FIGS. 1 and 5 (a), the bottom tube portion 5c of the refrigerant outlet tube 5 is inserted into the through holes 6c and 6d of the extension portion 6b, thereby fixing the bag 6 in the vertical direction. Is called. On the other hand, as shown in FIG. 1, the bag 6 is fixed in the horizontal direction by making the thickness D1 of the bag 6 approximately equal to or larger than the interval D2 between the side tube portions 5d and 5e, and the side tube portion 5d, This is done by pinching the bag 6 with 5e. In FIG. 1, the bag 6 is drawn with a small thickness D <b> 1 in order to make the drawing easier to see. Moreover, you may make it fix the bag 6 in the horizontal direction by making lateral width D3 shown in FIG. 4 the same as the internal diameter of the fuselage 3, or larger than this internal diameter.

  Next, the operation of the accumulator 1 having the above configuration will be described with reference to FIGS. In the following description, the accumulator 1 is disposed between the evaporator and the compressor of the refrigeration cycle, and moisture contained in the refrigerant from the evaporator is removed to generate a gas refrigerant, which is supplied to the compressor. The case of returning will be described as an example.

  When the refrigerant is discharged from the evaporator, it is conveyed to the accumulator 1 through a connection pipe (not shown). As shown in FIG. 1, the refrigerant that has reached the accumulator 1 flows into the refrigerant inflow hole 7 of the header 4 and flows toward the bottom of the body 3. In the process, it contacts the desiccant 15 in the bag 6, thereby removing moisture in the refrigerant.

  The refrigerant (gas refrigerant) from which moisture has been removed is folded and raised at the bottom of the body 3, and is guided to the other end 5b of the refrigerant outlet pipe 5 (see arrow E in FIG. 2). The refrigerant flowing from the other end 5 b flows through the refrigerant outlet pipe 5 and is guided to the refrigerant outlet hole 8. At this time, the oil accumulated at the bottom of the body 3 is sucked through the oil return hole 11 and guided to the refrigerant outflow hole 8 together with the gas refrigerant. Thereafter, the gas refrigerant containing oil is discharged from the refrigerant outflow hole 8 and conveyed to the compressor through a connection pipe (not shown).

  Next, a method for manufacturing the bag 6 will be described with reference to FIG.

  First, one rectangular non-woven fabric having through holes 6c and 6d is folded in half, and in that state, about 2/3 of the front side long side (long side not connected) 6e The region 6f is joined by ultrasonic welding or the like (welded portion 6g). At this time, the remaining region of about 1/3, that is, the region 6h below the welded portion 6g is not welded and is opened.

  Next, from the lower end of the welding part 6g, welding is joined linearly in a direction orthogonal to the long side 6e (welding part 6i), thereby forming the bottom of the housing part 6a. Thereafter, the desiccant 15 is introduced from above the housing portion 6a, and finally the upper side 6j is welded and joined in a straight line to close the housing portion 6a (welded portion 6k). For this reason, the accommodating part 6a is closed in a bag shape so as to close the periphery, while the extension part 6b is in a state where the lower end part 6m and the front part 6n are opened.

  In addition, the joining method of a nonwoven fabric is not restricted to welding, You may use the stitching | suture by a sewing thread. Further, the through holes 6c and 6d are not necessarily formed first, but may be formed at the time of joining or at the end.

  Next, a method for assembling the accumulator 1 shown in FIG. 1 will be described with reference to FIGS. 1 and 5.

  After producing the bag 6 as described above, the refrigerant outlet pipe 5 in a state where the strainer 12 and the mounting clip 13 are not attached is inserted into the through holes 6c and 6d of the bag 6 as shown in FIG. Insert. Next, as shown in FIG. 5 (a), the extension 6b of the bag 6 is expanded left and right (in the direction of arrow F in FIG. The clip 13 is attached.

  At this time, the position of the extension 6b of the bag 6 is adjusted, and the strainer 12 and the mounting clip 13 are positioned inside the extension 6b (between the through holes 6c and 6d). Thereby, the strainer 12 or the attachment clip 13 is caused to function as a stopper when the extension portion 6b moves along the refrigerant outlet pipe 5, and the position of the extension portion 6b is prevented from being greatly displaced.

  Next, as shown in FIG. 1, one end 5 a and the other end 5 b of the refrigerant outlet pipe 5 are fixed to the header 4, and the refrigerant outlet pipe 5 and the header 4 are joined. The refrigerant outlet pipe 5 is fixed by inserting one end portion 5a of the refrigerant outlet pipe 5 into the second convex portion 4c of the header 4 and then expanding the one end portion 5a using a predetermined jig. Finally, the header 4 to which the refrigerant outlet pipe 5 is attached is placed on the opening of the body 3, and the header 4 and the body 3 are welded and joined.

  As described above, according to the present embodiment, the extension portion 6b is formed adjacent to the storage portion 6a for storing the desiccant 15, and the through holes 6c and 6d are formed in the extension portion 6b. In order to insert the bottom pipe portion 5c of the refrigerant outlet pipe 5 into the through holes 6c and 6d and fix the bag 6, the container 6a is positioned between the side pipe parts 5d and 5e of the refrigerant outlet pipe 5, The bag 6 can be fixed. For this reason, the bag 6 can be fixed without making the accommodating part 6a contact the attachment clip 13 (cornered object), and the bag 6 can be prevented from being damaged. Moreover, since the bag 6 does not contact the strainer 12, the mesh of the strainer 12 is not blocked by the bag 6, so that the oil return property is not impaired.

  Further, similarly to the conventional accumulator 30 shown in FIG. 8, since a member for fixing the bag 6 is not necessary, the number of parts can be reduced, and the refrigerant outlet is provided in the through holes 6c and 6d of the bag 6. Since it is sufficient to insert the tube 5, it is easy to attach the bag 6.

  In the above embodiment, as shown in FIG. 4, the front portion 6 n of the extension portion 6 b is opened without joining, but as shown in FIGS. 6 and 7, the front portion of the bag 6 is opened. The entire long side 6e (region 17) may be joined by the welded portion 18, and only the lower end portion 6m of the extended portion 6b may be opened. In this case, since the extension part 6b becomes difficult to bend, it becomes possible to support the accommodating part 6a appropriately.

  Moreover, in the said embodiment, although the nonwoven fabric is folded in half and the bag 6 is formed, you may make it overlap and form several nonwoven fabrics which have the same shape.

DESCRIPTION OF SYMBOLS 1 Accumulator 2 Tank main body 3 Body 4 Header 4a Ceiling surface 4b 1st convex part 4c 2nd convex part 4d 3rd convex part 5 Refrigerant outlet pipe 5a One end part 5b Other end part 5c Bottom pipe part 5d, 5e Side pipe Part 6 Bag 6a Housing part 6b Extension part 6c, 6d Through hole 6e Front side long side 6f Area 6g Welding part 6h Area 6i Welding part 6j Upper side 6k Welding part 6m Lower end part 6n Front part 7 Refrigerant inflow hole 8 Refrigerant outflow hole 9 welded portion 10 gap 11 oil return hole 12 strainer 13 mounting clip 15 desiccant 17 region 18 welded portion

Claims (4)

A tank body provided with a refrigerant inflow hole and a refrigerant outflow hole;
A U-shaped refrigerant outlet pipe disposed in the tank body with one end connected to the refrigerant outlet hole;
A bag disposed in the tank body and containing a desiccant;
The bag includes a storage portion that stores the desiccant and an extension formed adjacent to the storage portion, and the storage portion is disposed between the opposing side pipe portions of the refrigerant outlet pipe , The extension part is provided with an insertion part for inserting a bottom pipe part of the refrigerant outlet pipe ,
The bag is formed by folding a cloth member in two or overlapping cloth members of the same shape,
The housing portion is formed by joining the cloth member so as to close the periphery in a partial region of the cloth member in the folded state or the overlapped cloth member,
The refrigerant tank is characterized in that the extension part is formed in the remaining region of the cloth member folded in half or the cloth member in an overlapped state with at least a lower end portion of the cloth member not joined. . The refrigerant tank according to claim 1, wherein the insertion portion includes a pair of through holes. A member that is convex with respect to the surface of the refrigerant outlet pipe is attached to the refrigerant outlet pipe, and the refrigerant outlet pipe is inserted so that the member is positioned between the pair of through holes. The refrigerant tank according to claim 2 . The tank body includes a bottomed cylindrical body having an open upper end, and a header that is provided with the refrigerant inflow hole and the refrigerant outflow hole and seals the open end of the body. 2. The refrigerant tank according to 2 or 3 .

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