JP6925664B2 - Accumulator and its assembly method - Google Patents

Description

The present invention relates to an accumulator that stores a refrigerant that circulates in a refrigeration cycle, and a method for assembling the accumulator.

An example of a conventional accumulator is shown in FIGS. 16 and 17. The conventional accumulator 901 has a tank body 905. The tank body 905 has a bottomed cylindrical body 910 and a disk-shaped header 920 that seals the opening 912 of the body 910. A bag 960 is housed in the fuselage 910. The bag 960 contains a desiccant 965. The desiccant 965 adsorbs the moisture in the refrigerant stored in the body 910.

The header 920 is provided with a refrigerant inflow hole 922 and a refrigerant outflow hole 924. The header 920 is fitted with a double pipe 930 that connects to the refrigerant outflow hole 924 and extends close to the bottom 914 of the fuselage 910.

The desiccant 965 sealed in the bag 960 has a function of adsorbing water in the refrigerant and also having a function of promoting vaporization of the liquid phase refrigerant. During normal operation of the refrigeration cycle, vaporization of the liquid phase refrigerant occurs at the gas-liquid interface. However, when the pressure inside the tank body 905 drops due to the start of the compressor at the start of the refrigeration cycle, vaporization may occur in the liquid phase refrigerant because the desiccant 965 is immersed in the liquid phase refrigerant. Therefore, in order to suppress the vaporization of a large amount of the liquid phase refrigerant at one time (bumping), the bag 960 is attached to the double pipe 930 in a vertical direction, and the upper part of the bag 960 is immersed in the liquid phase refrigerant. It is arranged so that it does not get caught. For example, Patent Document 1 discloses a bag 960 having a configuration in which the bag 960 is arranged in a vertical direction, similar to the conventional accumulator 901.

JP-A-2017-198404

However, in the accumulator 901 described above, the bag 960 is attached to the double pipe 930 with a binding band 936 made of resin. Therefore, the number of parts and the work man-hours increase, which causes an increase in manufacturing cost. Further, the bag 960 may fall off from the double pipe 930 due to the deterioration of the binding band 936, and there is room for improvement in reliability.

Therefore, an object of the present invention is to provide an accumulator capable of improving reliability and reducing manufacturing costs, and a method for assembling the accumulator.

In order to achieve the above object, the accumulator according to one aspect of the present invention is housed in a tubular body having an opening and a bottom, a header fixed to the opening, and a desiccant. An accumulator having a bag and a refrigerant pipe arranged so as to extend linearly from the header toward the bottom of the bag so that the length direction of the bag is along the refrigerant pipe. It is arranged and is sandwiched and held between the body and the refrigerant pipe over the entire length direction.

According to the present invention, a bag containing a desiccant is sandwiched between a body and a refrigerant pipe and held. As a result, the bag can be held without using a cable tie. Therefore, the number of parts and the work man-hours can be reduced. Further, since the bag is held by the body and the refrigerant pipe attached to the header fixed to the body, there is less risk of deterioration as compared with the binding band, and the bag can be effectively suppressed from falling off.

In the present invention, the bag has two desiccant encapsulation portions partitioned from each other at the center in the width direction of the bag, and is arranged so that the center in the width direction is in contact with the refrigerant pipe and encloses the desiccant. It is preferable that the thickness of the portion is larger than the distance between the body and the refrigerant pipe. By doing so, it is possible to more reliably prevent the desiccant-sealed portion from passing between the body and the refrigerant pipe. Therefore, the bag can be prevented from falling off more effectively.

In the present invention, it is preferable that an umbrella-shaped gas-liquid separation member is arranged below the header, and the upper end of the bag is arranged inside the gas-liquid separation member. By doing so, it is possible to prevent the bag from being affected by the heat generated when the body and the header are fixed by welding.

In order to achieve the above object, the accumulator according to another aspect of the present invention includes a tubular body having an opening and a bottom, a header fixed to the opening, and a desiccant housed in the body. An accumulator having a bag in which the bag is sealed and a refrigerant pipe arranged so as to extend from the header toward the bottom, wherein the bag is sandwiched between the body and the refrigerant pipe and held. An umbrella-shaped gas-liquid separating member is arranged below the header, the upper end of the bag is arranged inside the gas-liquid separating member, and the gas-liquid separating member is arranged on the peripheral wall portion and the header side of the peripheral wall portion. It has an upper wall portion connected to the end portion of the bag and a holding portion that protrudes inward from the peripheral wall portion or the upper wall portion, so that the pressing portion restricts the movement of the bag in the vertical direction. It is characterized in that it is in contact with the upper end of the bag. In this way, it is possible to suppress the drying agent by shock due to vertical movement of the back grayed resulting in powdering.

In the present invention, the refrigerant pipe has an inner pipe, an outer pipe in which the inner pipe is arranged inside, and a pressing portion protruding outward from the outer pipe, and the pressing portion is the bag. It is preferable that it is in contact with the upper end of the bag so as to restrict the movement in the vertical direction. In this way, it is possible to suppress the drying agent by shock due to vertical movement of the back grayed resulting in powdering.

In order to achieve the above object, it is a method of assembling an accumulator according to another aspect of the present invention, in which a refrigerant pipe attached to a header is horizontally arranged and a desiccant is sealed in the refrigerant pipe. The refrigerant pipe and the bag are inserted into a tubular body, the bag is sandwiched between the body and the refrigerant pipe, the opening of the body is sealed with the header, and the header is closed with the header. It is characterized by sticking to a portion.

According to the present invention, a bag containing a desiccant is sandwiched between a body and a refrigerant pipe and held. As a result, the bag can be held without using a cable tie. Therefore, the number of parts and the work man-hours can be reduced. Further, since the bag is held by the body and the refrigerant pipe attached to the header fixed to the body, there is less risk of deterioration as compared with the binding band, and the bag can be effectively suppressed from falling off.

In the present invention, the bag has two desiccant sealing portions partitioned from each other at the center in the width direction, and when the bag is placed on the refrigerant pipe, the center in the width direction of the bag is along the refrigerant pipe. It is preferable to arrange them. By doing so, the two desiccant sealing portions hang down on both sides of the center in the width direction of the bag due to their own weight, and are stably held on the refrigerant pipe. Therefore, workability can be effectively improved.

According to the present invention, reliability can be improved and manufacturing cost can be reduced.

It is sectional drawing of the accumulator which concerns on one Example of this invention. It is sectional drawing which follows the AA line of FIG. It is sectional drawing explaining the assembly method of the accumulator of FIG. 1, and shows the state before attaching the double pipe to a header. It is sectional drawing explaining the assembly method of the accumulator of FIG. 1, and shows the state which attached the double pipe to the header, and attached the strainer to the double pipe. It is sectional drawing explaining the assembly method of the accumulator of FIG. 1, and shows the state which puts a bag on a double tube, and inserts it into a body. It is sectional drawing which shows the structure of the 1st modification of the accumulator of FIG. It is sectional drawing which follows the A1-A1 line of FIG. It is a bottom view of the gas-liquid separation member included in the accumulator of FIG. It is sectional drawing which shows the structure of the 2nd modification of the accumulator of FIG. It is sectional drawing which follows the A2-A2 line of FIG. It is a bottom view of the gas-liquid separation member included in the accumulator of FIG. It is sectional drawing which shows the structure of the 3rd modification of the accumulator of FIG. It is sectional drawing which follows the A3-A3 line of FIG. It is sectional drawing which shows the structure of the 4th modification of the accumulator of FIG. It is sectional drawing which follows the A4-A4 line of FIG. It is sectional drawing of the conventional accumulator. It is sectional drawing which follows the line BB of FIG.

Hereinafter, the accumulator according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

The accumulator 1 of the present embodiment has a function of storing the refrigerant circulating in the refrigeration cycle, performing gas-liquid separation of the refrigerant, and removing water in the refrigerant.

FIG. 1 is a cross-sectional view (longitudinal cross-sectional view) of the accumulator according to an embodiment of the present invention along the axial direction. FIG. 2 is a cross-sectional view (cross-sectional view) taken along the line AA of FIG. 3 to 5 are cross-sectional views illustrating a method of assembling the accumulator of FIG. 3 to 5 show, in order, the state before the double pipe is attached to the header, the state where the double pipe is attached to the header, the strainer is attached to the double pipe, and the bag is placed on the double pipe and put on the fuselage. Indicates the state of insertion.

As shown in FIG. 1, the accumulator 1 has a tank body 5, a double pipe 30 as a refrigerant pipe, a gas-liquid separation member 40, a strainer 50, and a bag 60.

The tank body 5 has a bottomed cylindrical body 10 and a disk-shaped header 20.

The body 10 has an opening 12 at one end and a bottom 14 at the other end. The bottom 14 is thicker than the rest of the fuselage 10. The body 10 secures rigidity by increasing the thickness of the bottom portion 14. The header 20 seals the opening 12 of the body 10. The body 10 and the header 20 are fixed by welding at the welded portion M. A bag 60 is housed in the body 10.

The header 20 is provided with a refrigerant inflow hole 22 and a refrigerant outflow hole 24. The refrigerant inflow hole 22 and the refrigerant outflow hole 24 penetrate the header 20 in the thickness direction. A refrigerant (mixed refrigerant) in which a gas phase refrigerant and a liquid phase refrigerant are mixed flows through the refrigerant inflow hole 22. The vapor phase refrigerant separated from the mixed refrigerant and the lubricating oil for the compressor flow through the refrigerant outflow holes 24.

The double pipe 30 integrally has an inner pipe 31 and an outer pipe 32 in which the inner pipe 31 is arranged inside. The inner pipe 31 projects upward from the outer pipe 32. The inner pipe 31 is connected to the refrigerant outflow hole 24.

The inner pipe 31 integrally has a pipe main body portion 31a having a large outer diameter and a thin-walled portion 31b having a small outer diameter connected to the pipe main body portion 31a. The pipe main body portion 31a and the thin-walled portion 31b have the same inner diameter. A step portion 31c is provided between the pipe main body portion 31a and the thin-walled portion 31b. The thin portion 31b is attached to the header 20 by being inserted into the refrigerant outflow hole 24 and deformed so as to increase the diameter. An inverted conical cap 33 having a distribution hole 33a in the center is attached to the lower end portion 32a of the outer pipe 32 by caulking.

The gas-liquid separation member 40 separates the mixed refrigerant that has flowed into the tank body 5 from the refrigerant inflow hole 22 into a high-density liquid-phase refrigerant and lubricating oil, and a low-density gas-phase refrigerant. The gas-liquid separation member 40 is formed in a circular umbrella shape in a plan view. The gas-liquid separation member 40 has a cylindrical peripheral wall portion 41 and a circular flat plate-shaped upper wall portion 42 connected to the end portion of the peripheral wall portion 41 on the header 20 side. The gas-liquid separation member 40 is arranged below the header 20 in the tank body 5. The upper wall portion 42 of the gas-liquid separation member 40 is provided with a through hole 40a having the same diameter as the outer diameter of the thin-walled portion 31b of the inner pipe 31. The upper wall portion 42 is arranged at intervals in the vertical direction from the upper end of the outer pipe 32. The gas-liquid separation member 40 has a plurality of reinforcing ribs 43 extending in the radial direction from the through hole 40a. In addition, in FIG. 1, FIG. 3 to FIG. 5, the description of the plurality of reinforcing ribs 43 is omitted. The gas-liquid separation member 40 has a thin-walled portion 31b inserted into the through hole 40a and is attached to the header 20 together with the double pipe 30. In this embodiment, the body 10, the header 20, the double pipe 30, and the gas-liquid separation member 40 are made of a metal such as an aluminum alloy.

The strainer 50 is made of synthetic resin and is formed in a cup shape having a mesh portion on the peripheral wall. When the lubricating oil accumulated in the lower part of the tank body 5 is sucked through the cap 33 and the inner pipe 31, the strainer 50 filters the lubricating oil to remove foreign substances. The strainer 50 is fitted to the lower end portion 32a of the outer pipe 32 so as to cover the cap 33. The strainer 50 is arranged on the bottom 14 of the body 10.

The bag 60 is filled with a desiccant 65 that adsorbs the moisture in the refrigerant. The bag 60 is made of a non-woven fabric made of a synthetic resin such as polyethylene fiber. The bag 60 is held in the tank body 5 in a vertical direction by being sandwiched between the body 10 and the outer pipe 32. The bag 60 has substantially the same length as the distance from the upper end of the outer pipe 32 to the bottom 14 of the body 10. The upper end portion 60a of the bag 60 is arranged inside the gas-liquid separation member 40. The lower end 60b of the bag 60 is in contact with the bottom 14 of the body 10.

The bag 60 is, for example, a bag in which two pieces of cloth having a rectangular shape in a plan view are stacked and sewn on all four sides to form a bag in which the internal space is closed. The bag 60 is provided with two desiccant sealing portions 62, 62 partitioned by seams 61 by sewing two stacked cloths along the center in the width direction. Instead of sewing, the bag 60 may be welded with two layers of cloth. The thickness T of each of the desiccant sealing portions 62 and 62 is larger than the distance D between the body 10 and the outer pipe 32. By doing so, it is possible to prevent the bag 60 from slipping between the body 10 and the outer pipe 32.

Next, an example of the operation of the accumulator 1 described above will be described.

In the refrigeration cycle, the accumulator 1 is placed between an evaporator and a compressor (not shown). The accumulator 1 is arranged in a posture in which the bottom portion 14 of the body 10 is downward and the opening 12 is upward. The accumulator 1 removes water contained in the refrigerant from the evaporator to generate a gas refrigerant (gas phase refrigerant). Then, the accumulator 1 returns the generated gas refrigerant to the compressor.

The mixed refrigerant discharged from the evaporator flows into the tank body 5 through the refrigerant inflow hole 22. The mixed refrigerant collides with the gas-liquid separation member 40 and is separated into a high-density liquid-phase refrigerant and a lubricating oil and a low-density gas-phase refrigerant.

The liquid phase refrigerant and lubricating oil move downward due to gravity. In the process, the separation of the liquid phase refrigerant and the oil progresses, the lubricating oil is accumulated in the lower part of the tank body 5, and the liquid phase refrigerant is accumulated on the lubricating oil. At this time, the liquid level height of the liquid phase refrigerant is adjusted so as to be at a height position where a part of the bag 60 is immersed. As a result, both the water contained in the liquid phase refrigerant and the water (moisture) contained in the vapor phase refrigerant are adsorbed on the desiccant 65.

The vapor phase refrigerant flows into the outer pipe 32 from the upper end and moves downward in the outer pipe 32. Then, the vapor phase refrigerant is folded back at the bottom of the outer pipe 32, flows into the inner pipe 31, and rises in the inner pipe 31. At this time, the lubricating oil accumulated at the bottom of the body 10 is sucked through the flow hole 33a of the cap 33, and the sucked lubricating oil is mixed with the vapor phase refrigerant. The vapor-phase refrigerant mixed with the lubricating oil flows out from the refrigerant outflow hole 24 and is supplied to the compressor.

Further, since the bag 60 is held in a vertical direction, the proportion of the desiccant 65 in contact with the liquid phase refrigerant stored in the tank body 5 is reduced. As a result, the occurrence of vaporization of the liquid phase refrigerant is reduced, and the abnormal noise associated with the vaporization is reduced.

Next, an example of the method for assembling the accumulator 1 described above will be described with reference to FIGS. 3 to 5.

As shown in FIG. 3, the header 20, the gas-liquid separation member 40, and the double pipe 30 are arranged in this order. Next, as shown in FIG. 4, the thin portion 31b of the double pipe 30 is sequentially inserted into the through hole 40a of the gas-liquid separation member 40 and the refrigerant outflow hole 24 of the header 20. Then, the gas-liquid separation member 40 is sandwiched between the header 20 and the stepped portion 31c of the inner pipe 31, and in this state, the thin-walled portion 31b is deformed so as to expand the diameter. As a result, the gas-liquid separation member 40 is attached to the header 20 together with the double pipe 30. Further, the cap 33 is attached to the lower end portion 32a of the outer pipe 32 by caulking. Then, the strainer 50 is fitted to the lower end portion 32a of the outer pipe 32.

Next, as shown in FIG. 5, the double pipe 30 is arranged horizontally, and the bag 60 is placed on the outer pipe 32. At this time, the center of the bag 60 in the width direction is arranged along the outer pipe 32. Specifically, the center of the bag 60 in the width direction is arranged along the position located at the uppermost position on the outer peripheral surface of the horizontally arranged outer pipe 32. As a result, the desiccant sealing portions 62, 62 hang down on both sides of the center in the width direction of the bag 60 due to their own weight, and are stably held on the outer pipe 32. Then, with the strainer 50 at the head, the bag 60, the double pipe 30, and the gas-liquid separation member 40 are inserted into the body 10. The bag 60 inserted into the body 10 is sandwiched and held by the body 10 and the double pipe 30. Then, the opening 12 is sealed by the header 20. Finally, the body 10 and the header 20 are welded and fixed to complete the accumulator 1.

From the above, according to the accumulator 1 of the present embodiment, the bag 60 in which the desiccant 65 is sealed is sandwiched between the body 10 and the double pipe 30 and held. From this, the bag 60 can be held without using a cable tie. Therefore, the number of parts and the work man-hours can be reduced. Further, since the bag 60 is held by the body 10 and the double pipe 30 attached to the header 20 fixed to the body 10, there is less risk of deterioration as compared with the binding band, and the bag 60 can be effectively dropped off. Can be suppressed. In particular, since the body 10, the header 20, and the double pipe 30 are made of metal, they have higher rigidity and less risk of deterioration than the binding band made of synthetic resin.

Further, the bag 60 has two desiccant sealing portions 62, 62 partitioned from each other in the center in the width direction. The thickness T of the desiccant sealing portions 62, 62 is larger than the distance D between the body 10 and the outer pipe 32 of the double pipe 30. By doing so, it is possible to more reliably prevent the desiccant sealing portions 62, 62 from passing between the body 10 and the outer pipe 32. Therefore, the bag 60 can be prevented from falling off more effectively.

Further, an umbrella-shaped gas-liquid separation member 40 is arranged below the header 20. The upper end portion 60a of the bag 60 is arranged inside the gas-liquid separation member 40. By doing so, it is possible to block the heat generated when the body 10 and the header 20 are fixed by welding by the gas-liquid separation member, and the bag 60 made of a non-woven fabric made of synthetic resin is affected by the heat. It is possible to suppress melting.

In the above-described embodiment, the bag 60 has two desiccant encapsulation portions 62 partitioned in the center in the width direction, but the present invention is not limited thereto. For example, the bag 60 may have a bag shape having one internal space.

In the above-described embodiment, the configuration employs a double pipe as a refrigerant pipe extending in a straight line, but in addition to this, for example, a configuration in which a U-shaped refrigerant pipe shown in Patent Document 1 is adopted. The present invention may be applied. That is, the refrigerant pipe that sandwiches the desiccant-containing bag together with the body may include a portion that is arranged so as to extend from the header toward the bottom of the body.

6 to 8 show the configuration of the accumulator 1A, which is a first modification of the accumulator 1 of FIG. 6 is a vertical cross-sectional view, FIG. 7 is a cross-sectional view taken along the line A1-A1 of FIG. 6, and FIG. 8 is a bottom view of the gas-liquid separation member 40A. In FIGS. 6 to 8, the same components as those of the accumulator 1 described above are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 6, the plurality of reinforcing ribs 43 of the gas-liquid separating member 40A are omitted.

The accumulator 1A shown in FIG. 6 has a gas-liquid separation member 40A. The accumulator 1A has the same configuration as the accumulator 1 described above except for the gas-liquid separation member 40A.

The gas-liquid separation member 40A is made of a metal such as an aluminum alloy. The gas-liquid separation member 40A has a peripheral wall portion 41, an upper wall portion 42, and a plurality of reinforcing ribs 43. Further, the gas-liquid separation member 40A has two pressing pieces 44A as pressing portions. The holding piece 44A projects from the peripheral wall portion 41 to the inside of the gas-liquid separation member 40A. The holding piece 44A is formed in a square flat plate shape. The holding piece 44A is formed by bending a part of the lower end portion of the peripheral wall portion 41 inward. The holding piece 44A may be fixed to the peripheral wall portion 41 by welding or the like. The holding piece 44A is arranged at a distance from the upper wall portion 42 in the vertical direction. The holding piece 44A is in contact with the upper end portion 60a of the bag 60. The two holding pieces 44A are arranged corresponding to the desiccant sealing portions 62 and 62, respectively. The holding piece 44A restricts the vertical movement of the bag 60. Therefore, it is possible to prevent the desiccant 65 from being pulverized due to the impact caused by the vertical movement of the bag 60. Further, the holding piece 44A is brought into contact with the upper end portion 60a of the bag 60, so that the bag 60 and the upper wall portion 42 are arranged at intervals. Therefore, it is possible to more effectively suppress the bag 60 from being affected by the heat generated when the body 10 and the header 20 are fixed by welding.

9 to 11 show the configuration of the accumulator 1B, which is a second modification of the accumulator 1 of FIG. 9 is a vertical cross-sectional view, FIG. 10 is a cross-sectional view taken along line A2-A2 of FIG. 9, and FIG. 11 is a bottom view of the gas-liquid separation member 40B. In FIGS. 9 to 11, the same components as those of the accumulator 1 described above are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 9, the plurality of reinforcing ribs 43 of the gas-liquid separating member 40B are omitted.

The accumulator 1B shown in FIG. 9 has a gas-liquid separation member 40B. The accumulator 1B has the same configuration as the accumulator 1 described above except for the gas-liquid separation member 40B.

The gas-liquid separation member 40B is made of a synthetic resin. The gas-liquid separation member 40B has a peripheral wall portion 41, an upper wall portion 42, and a plurality of reinforcing ribs 43. Further, the gas-liquid separation member 40B has four pressing ribs 44B as pressing portions. The pressing rib 44B projects from the peripheral wall portion 41 and the upper wall portion 42 to the inside of the gas-liquid separation member 40A. The pressing rib 44B is formed in a square flat plate shape. One side of the pressing rib 44B along the vertical direction is connected to the inner peripheral surface of the peripheral wall portion 41. The upper side of the pressing rib 44B along the horizontal direction is connected to the lower surface of the upper wall portion 42. The lower side of the holding rib 44B along the horizontal direction is in contact with the upper end portion 60a of the bag 60. Two of the four pressing ribs 44B are arranged corresponding to the desiccant sealing portions 62 and 62, respectively. The pressing rib 44B regulates the vertical movement of the bag 60. Further, the lower side of the pressing rib 44B is brought into contact with the upper end portion 60a of the bag 60, so that the bag 60 and the upper wall portion 42 are arranged at intervals. Since the accumulator 1B has the pressing rib 44B, it has the same effect as the accumulator 1A of the first modification described above.

12 and 13 show the configuration of the accumulator 1C, which is a third modification of the accumulator 1 of FIG. FIG. 12 is a vertical cross-sectional view, and FIG. 13 is a cross-sectional view taken along the line A3-A3 of FIG. In FIGS. 12 and 13, the same components as those of the accumulator 1 described above are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 12, the description of the plurality of reinforcing ribs 43 of the gas-liquid separation member 40 is omitted.

The accumulator 1C shown in FIG. 12 has a double pipe 30C as a refrigerant pipe. The accumulator 1C has the same configuration as the accumulator 1 described above except for the double tube 30C.

The double pipe 30C is made of a metal such as an aluminum alloy. The double pipe 30C has an inner pipe 31 and an outer pipe 32. Further, the double pipe 30C has one holding piece 34C as a holding portion. The holding piece 34C projects outward from the upper end of the outer pipe 32 (the radial outer side of the outer pipe 32). The holding piece 34C is formed by bending the square flat plate-shaped protruding piece protruding upward from the upper end of the outer pipe 32 to the outside. The holding piece 34C may be fixed to the outer pipe 32 by welding or the like. The holding pieces 34C are arranged at intervals in the vertical direction from the upper wall portion 42. The holding piece 34C is in contact with the upper end portion 60a of the bag 60. The holding piece 34C is arranged so as to correspond to the seam 61 between the desiccant sealing portions 62 and 62. The holding piece 34C regulates the vertical movement of the bag 60. Further, the holding piece 34C is brought into contact with the upper end portion 60a of the bag 60, so that the bag 60 and the upper wall portion 42 are arranged at intervals. Since the accumulator 1C has the holding piece 34C, it has the same effect as the accumulator 1A of the first modification described above.

14 and 15 show the configuration of the accumulator 1D, which is a fourth modification of the accumulator 1 of FIG. FIG. 14 is a vertical cross-sectional view, and FIG. 15 is a cross-sectional view taken along the line A4-A4 of FIG. In FIGS. 14 and 15, the same components as those of the accumulator 1 described above are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 14, the plurality of reinforcing ribs 43 of the gas-liquid separation member 40 are omitted.

The accumulator 1D shown in FIG. 14 has a double pipe 30D as a refrigerant pipe. The accumulator 1D has the same configuration as the accumulator 1 described above except for the double tube 30D.

The double pipe 30D is made of a metal such as an aluminum alloy. The double pipe 30D has an inner pipe 31 and an outer pipe 32. Further, the double pipe 30D has two holding pieces 34D as holding portions. The holding piece 34D projects outward from the upper end of the outer pipe 32 (the radial outer side of the outer pipe 32). The holding piece 34D is formed by bending the square flat plate-shaped protruding piece protruding upward from the upper end of the outer pipe 32 to the outside. The holding piece 34D may be fixed to the outer pipe 32 by welding or the like. The holding piece 34D is arranged at a distance from the upper wall portion 42 in the vertical direction. The holding piece 34D is in contact with the upper end portion 60a of the bag 60. The two holding pieces 34D are arranged corresponding to the desiccant sealing portions 62 and 62, respectively. The holding piece 34D regulates the vertical movement of the bag 60. Further, the holding piece 34D is brought into contact with the upper end portion 60a of the bag 60, so that the bag 60 and the upper wall portion 42 are arranged at intervals. Since the accumulator 1D has the holding piece 34D, it has the same effect as the accumulator 1A of the first modification described above.

Although examples of the present invention have been described above, the present invention is not limited to these examples. As long as the gist of the present invention is not contrary to the above-described embodiment, those skilled in the art appropriately adding, deleting, or changing the design, or combining the features of the examples as appropriate are also present inventions. Is included in the range of.

1, 1A, 1B, 1C, 1D ... Accumulator 5 ... Tank body 10 ... Body 12 ... Opening 14 ... Bottom 20 ... Header 22 ... Refrigerant inflow hole 24 ... Refrigerant outflow hole 30, 30C, 30D ... Double pipe 31 ... Inner Pipe 31a ... Pipe body 31b ... Thin wall 31c ... Step 32 ... Outer pipe 32a ... Lower end 33 ... Cap 33a ... Flow holes 34C, 34D ... Holding pieces 40, 40A, 40B ... Gas-liquid separation member 40a ... Through hole 41 ... Peripheral wall part 42 ... Upper wall part 43 ... Reinforcing rib 44A ... Holding piece 44B ... Holding rib 50 ... Strainer 60 ... Bag 60a ... Upper end part 61 ... Seam 62 ... Drying agent sealing part M ... Welded part T ... Drying agent sealing part Thickness D ... Distance between the fuselage and the double pipe

Claims (7)

A tubular body having an opening and a bottom, a header fixed to the opening, a bag housed in the body and filled with a desiccant, and extending linearly from the header toward the bottom. An accumulator having an arranged refrigerant pipe,
The accumulator is characterized in that the bag is arranged so that the length direction of the bag is along the refrigerant pipe, and is sandwiched and held between the body and the refrigerant pipe over the entire length direction. The bag has two desiccant enclosures partitioned from each other at the center of the width direction of the bag, and is arranged so that the center of the width direction is in contact with the refrigerant pipe.
The accumulator according to claim 1, wherein the thickness of the desiccant-encapsulated portion is larger than the distance between the body and the refrigerant pipe. An umbrella-shaped gas-liquid separation member is arranged below the header.
The accumulator according to claim 1 or 2, wherein the upper end portion of the bag is arranged inside the gas-liquid separation member. A tubular body having an opening and a bottom, a header fixed to the opening, a bag housed in the body and filled with a desiccant, and arranged so as to extend from the header toward the bottom. An accumulator having a refrigerant pipe and
The bag is sandwiched and held between the body and the refrigerant pipe.
An umbrella-shaped gas-liquid separation member is arranged below the header.
The upper end of the bag is located inside the gas-liquid separation member.
The gas-liquid separation member has a peripheral wall portion, an upper wall portion connected to the header-side end portion of the peripheral wall portion, and a holding portion protruding inward from the peripheral wall portion or the upper wall portion. death,
An accumulator characterized in that the holding portion is in contact with an upper end portion of the bag so as to restrict the vertical movement of the bag. The refrigerant pipe has an inner pipe, an outer pipe in which the inner pipe is arranged inside, and a holding portion that protrudes outward from the outer pipe.
The accumulator according to any one of claims 1 to 3, wherein the holding portion is in contact with an upper end portion of the bag so as to restrict the vertical movement of the bag. How to assemble the accumulator
The refrigerant pipe attached to the header is arranged horizontally, and a bag containing a desiccant is placed on the refrigerant pipe.
The refrigerant pipe and the bag are inserted into a tubular body, and the bag is sandwiched between the body and the refrigerant pipe.
A method for assembling an accumulator, which comprises sealing an opening of the body with the header and fixing the header to the opening. The bag has two desiccant enclosures partitioned from each other in the center in the width direction.
The method for assembling an accumulator according to claim 6, wherein when the bag is placed on the refrigerant pipe, the center of the bag in the width direction is arranged along the refrigerant pipe.

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