CN112013581A - Liquid storage device and assembling method thereof - Google Patents

Abstract

Provided are a liquid reservoir and an assembling method thereof, wherein reliability can be improved and manufacturing cost can be reduced. The liquid reservoir (1) has a cylindrical case (10) having an opening (12) and a bottom (14); a head (20) fixedly attached to the opening (12); and a double tube (30) configured to extend from the head to the base. A case (10) houses a bag (60) in which a desiccant (65) is sealed. The bag (60) is held between the housing (10) and the double pipe (30).

Description

Liquid storage device and assembling method thereof

Technical Field

The present invention relates to an accumulator that stores a refrigerant circulating in a refrigeration cycle and an assembly method of the accumulator.

Background

Fig. 16 and 17 show an example of a conventional reservoir. The conventional reservoir 901 includes a tank main body 905. The box main body 905 has: a bottomed cylindrical case 910, and a disk-shaped head 920 that closes an opening 912 of the case 910. The housing 910 houses a bag 960. The bag 960 contains a desiccant 965. The desiccant 965 absorbs moisture of the refrigerant stored in the case 910.

The head 920 is provided with a refrigerant inlet hole 922 and a refrigerant outlet hole 924. A double pipe 930 is installed at the head 920, and the double pipe 930 is connected to the refrigerant outflow hole 924 and extends to the vicinity of the bottom 914 of the case 910.

The desiccant 965 sealed in the bag 960 has a function of promoting vaporization of the liquid-phase refrigerant in addition to a function of absorbing moisture in the refrigerant. When the refrigeration cycle is normally operated, the liquid-phase refrigerant is vaporized at the gas-liquid boundary surface. However, at the start of the refrigeration cycle, when the pressure in the tank main body 905 is lowered due to the start of the compressor, the desiccant 965 is vaporized in the liquid-phase refrigerant due to the immersion in the liquid-phase refrigerant. Therefore, in order to suppress the occurrence of vaporization (bumping) of a large amount of liquid-phase refrigerant, the bag 960 is attached to the double pipe in a posture along the vertical direction, and is disposed so that the upper portion of the bag 960 is not immersed in the liquid-phase refrigerant. For example, patent document 1 discloses a cartridge having a structure in which a bag 960 is disposed in a posture along the vertical direction, as in the case of the conventional cartridge 901.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-198404

Technical problem to be solved by the invention

However, in the above described reservoir 901, the bag 960 is attached to the double pipe 930 with a binding band made of resin. Therefore, the number of parts and the number of man-hours increase, which becomes a factor of increasing the manufacturing cost. Further, since there is a possibility that the bag 960 is detached from the double pipe 930 due to the deterioration of the binding band 936, there is room for improvement in reliability.

Disclosure of Invention

Accordingly, an object of the present invention is to provide a reservoir and a method of assembling the reservoir, which can improve reliability and reduce manufacturing cost.

Means for solving the problems

In order to achieve the above object, a reservoir according to an embodiment of the present invention includes: a cylindrical housing having an opening and a bottom; a head portion fixedly attached to the opening portion; a bag that is housed in the case and that encloses a desiccant; and a refrigerant pipe configured to extend from the head portion toward the bottom portion, the bag being held by being sandwiched by the housing and the refrigerant pipe.

According to the present invention, the desiccant-sealed bag is held between the case and the refrigerant pipe. This enables the bag to be held without using a binding tape. Therefore, the number of parts and man-hours can be reduced. Further, since the bag is held by the case and the refrigerant pipe attached to the head portion fixedly attached to the case, the possibility of deterioration is reduced as compared with the case using the binding band, and the bag can be effectively prevented from falling off.

In the present invention, it is preferable that the bag has two desiccant-enclosing portions partitioned from each other at the center in the width direction, and the desiccant-enclosing portion has a thickness larger than a distance from the casing to the refrigerant tube. This can more reliably prevent the desiccant-enclosing section from slipping out from between the casing and the refrigerant pipe. Therefore, the bag can be more effectively prevented from falling off.

In the present invention, it is preferable that an umbrella-shaped gas-liquid separation member is disposed below the head, and an upper end portion of the bag is disposed inside the gas-liquid separation member. In this way, it is possible to suppress the bag from being affected by heat generated when the case and the head are fixed by welding.

In the present invention, it is preferable that the gas-liquid separation member includes: a peripheral wall portion; an upper wall portion provided continuously with an end portion of the peripheral wall portion on the head portion side; and a pressing portion that protrudes inward from the peripheral wall portion or the upper wall portion, the pressing portion abutting against an upper end portion of the bag to restrict movement of the bag in a vertical direction. This can suppress pulverization of the drying agent due to collision caused by the movement of the bag in the vertical direction.

In the present invention, it is preferable that the refrigerant pipe has: an inner tube; an outer tube, the inner tube being disposed inside the outer tube; and a pressing portion protruding outward from the outer tube, the pressing portion abutting against an upper end portion of the bag to restrict movement of the bag in a vertical direction. This can suppress pulverization of the drying agent due to collision caused by the movement of the bag in the vertical direction.

In order to achieve the above object, according to another aspect of the present invention, there is provided a method of assembling an accumulator, comprising arranging a refrigerant tube attached to a head portion in a horizontal direction, placing a bag in which a desiccant is sealed in the refrigerant tube, inserting the refrigerant tube and the bag into a cylindrical case, sandwiching the bag between the case and the refrigerant tube, closing an opening of the case with the head portion, and fixing the head portion to the opening.

According to the present invention, the desiccant-sealed bag is held by being sandwiched between the case and the refrigerant pipe. This enables the bag to be held without using a binding tape. Therefore, the number of parts and man-hours can be reduced. Further, since the bag is held by the case and the refrigerant pipe attached to the head portion fixedly attached to the case, the possibility of deterioration is reduced as compared with the case using the binding band, and the bag can be effectively prevented from falling off.

In the present invention, it is preferable that the bag has two desiccant-enclosing sections partitioned from each other at the center in the width direction, and the center in the width direction of the bag is arranged along the refrigerant tube when the bag is placed on the refrigerant tube. In this way, the two desiccant-enclosing portions hang down on both sides of the center of the bag in the width direction due to their own weight, and are stably held by the refrigerant tube. Therefore, the operability can be effectively improved.

ADVANTAGEOUS EFFECTS OF INVENTION

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

Drawings

Fig. 1 is a cross-sectional view of a reservoir in one embodiment of the invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a sectional view illustrating an assembling method of the accumulator of fig. 1, showing a state before the double pipe is mounted on the head.

Fig. 4 is a sectional view illustrating an assembling method of the accumulator of fig. 1, showing a state in which the double pipe has been mounted to the head, and the filter has been mounted to the double pipe.

Fig. 5 is a sectional view illustrating an assembly method of the accumulator of fig. 1, and shows a state where a bag is mounted on a double tube and inserted into a housing.

Fig. 6 is a sectional view showing a configuration of a first modification of the accumulator of fig. 1.

Fig. 7 is a sectional view taken along line a1-a1 of fig. 6.

Fig. 8 is a bottom view of a gas-liquid separating member provided in the accumulator of fig. 6.

Fig. 9 is a sectional view showing a configuration of a second modification of the accumulator of fig. 1.

Fig. 10 is a sectional view taken along line a2-a2 of fig. 9.

Fig. 11 is a bottom view of a gas-liquid separating member provided in the accumulator of fig. 9.

Fig. 12 is a sectional view showing a structure of a third modification of the accumulator of fig. 1.

Fig. 13 is a sectional view taken along line A3-A3 of fig. 12.

Fig. 14 is a sectional view showing a structure of a fourth modification of the accumulator of fig. 1.

Fig. 15 is a sectional view taken along line a4-a4 of fig. 14.

Fig. 16 is a sectional view of a conventional reservoir.

Fig. 17 is a sectional view taken along line B-B of fig. 16.

Description of the symbols

1. 1A, 1B, 1C, 1D … reservoir

5 … Box Main body

10 … casing

12 … opening part

14 … bottom

20 … head

22 … refrigerant inflow hole

24 … refrigerant outflow hole

30. 30C, 30D … double tube

31 … inner tube

31a … pipe body part

31b … thin wall part

31c … step part

32 … outer tube

32a … lower end

33 … cover body

33a … flow hole

34C, 34D … pressing sheet

40. 40A, 40B … gas-liquid separation part

40a … through hole

41 … peripheral wall part

42 … Upper wall portion

43 … reinforcing rib

44A … pressing sheet

44B … pressing rib

50 … filter

60 … bag

60a … upper end

61 … seam

62 … desiccant enclosing section

M … weld site

Thickness of desiccant enclosing part of T …

Distance of D … casing to double pipe

Detailed Description

Hereinafter, a reservoir in one embodiment of the present invention will be described with reference to fig. 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 moisture in the refrigerant.

Fig. 1 is a sectional view (longitudinal sectional view) of a reservoir in one embodiment of the present invention in an axial direction. Fig. 2 is a sectional view (cross-sectional view) taken along line a-a of fig. 1. Fig. 3 to 5 are sectional views illustrating an assembling method of the reservoir of fig. 1. Fig. 3 to 5 show in sequence: a state before the double tube is attached to the head, a state in which the double tube is attached to the head and the filter is attached to the double tube, and a state in which the double tube carries the bag and is inserted into the housing.

As shown in fig. 1, the accumulator 1 includes a tank main body 5, a double pipe 30 as a refrigerant pipe, a gas-liquid separation member 40, a filter 50, and a bag 60.

The box main body 5 has a bottomed cylindrical case 10 and a disc-shaped head 20.

The case 10 has an opening 12 at one end and a bottom 14 at the other end. The thickness of the bottom 14 is thicker than the thickness of the rest of the housing 10. The housing 10 ensures rigidity by thickening the thickness of the bottom 14. The head 20 closes the opening 12 of the housing 10. The housing 10 and the head 20 are fixedly attached by welding at the welding point M. The housing 10 accommodates a bag 60.

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

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

The inner tube 31 integrally includes a tube body portion 31a having a large outer diameter and a thin portion 31b having a small outer diameter and provided continuously to the tube body portion. The inner diameters of the tube body portion 31a and the thin portion 31b are the same. A stepped portion 31c is provided between the tube body portion 31a and the thin portion 31 b. The thin portion 31b is inserted into the refrigerant outflow hole 24 and deformed to expand the diameter thereof, and is attached to the head 20. An inverted conical cap 33 having a flow hole 33a at the center is attached to the lower end 32a of the outer tube 32 by caulking.

The gas-liquid separation member 40 separates the mixed refrigerant flowing into the tank main body 5 from the refrigerant inlet 22 into a high-density liquid-phase refrigerant, a lubricating oil, and a low-density gas-phase refrigerant. The gas-liquid separating member 40 is formed in a circular umbrella shape in plan view, and the gas-liquid separating member 40 includes a cylindrical peripheral wall portion 41 and a circular flat plate-like upper wall portion 42, and the upper wall portion 42 is provided so as to be continuous with an end portion of the peripheral wall portion 41 on the head portion 20 side. The gas-liquid separation member 40 is disposed below the head 20 in the tank main body 5. The upper wall 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 wall portion 31b of the inner tube 31. The upper wall portion 42 is disposed at a vertical interval from the upper end of the outer tube 32. The gas-liquid separation member 40 has a plurality of reinforcing ribs 43 extending radially from the through-hole 40 a. In fig. 1 and 3 to 5, the reinforcing ribs 43 are not described. The thin portion 31b is inserted into the through hole 40a of the gas-liquid separation member 40, and the gas-liquid separation member 40 is attached to the head 20 together with the double pipe 30. In the present embodiment, the casing 10, the head 20, the double pipe 30, and the gas-liquid separating member 40 are made of metal such as aluminum alloy.

The filter 50 is made of synthetic resin and is formed in a cap shape having a mesh portion in a peripheral wall thereof. When the lubricant oil accumulated in the lower portion of the tank main body 5 is sucked through the lid 33 and the inner tube 31, the filter 50 filters the lubricant oil and removes foreign substances. The filter 50 is fitted to the lower end portion 32a of the outer tube 32 so as to cover the lid 33. The filter 50 is disposed on the bottom 14 of the housing 10.

The bag 60 is filled with a desiccant 65 for absorbing moisture in the refrigerant. The bag 60 is made of a nonwoven fabric made of synthetic resin such as polyethylene fiber. The bag 60 is sandwiched between the case 10 and the outer pipe 32 so as to be held in a posture in the up-down direction inside the case 5. The bag 60 has a length substantially the same as the distance from the upper end of the outer tube 32 to the bottom 14 of the housing 10. The upper end 60a of the bag 60 is disposed inside the gas-liquid separation member 40. The lower end 60b of the bag 60 is in contact with the bottom 14 of the housing 10.

The bag 60 is, for example, a bag shape in which two pieces of cloth having a rectangular shape in plan view are overlapped and the inner space is closed by sewing four sides. The bag 60 is provided with two desiccant-enclosing sections 62, 62 divided by a seam 61 by sewing two pieces of cloth overlapped with each other along the center in the width direction. The bag 60 may be formed by welding two pieces of cloth, which are overlapped with each other, instead of sewing. The desiccant enclosing sections 62, 62 each have a thickness T greater than the distance D from the casing 10 to the outer tube 32. By doing so, the bag 60 can be prevented from slipping out from between the housing 10 and the outer tube 32.

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

In the refrigeration cycle, the accumulator 1 is disposed between an evaporator and a compressor, not shown. The liquid reservoir 1 is disposed in a posture in which the bottom 14 of the case 10 is downward and the opening 12 is upward. The accumulator 1 removes moisture 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 main body 5 through the refrigerant inlet hole 22. The mixed refrigerant collides with the gas-liquid separating member 40 and is separated into a high-density liquid-phase refrigerant, a lubricating oil, and a low-density gas-phase refrigerant.

The liquid-phase refrigerant and the lubricating oil move downward by gravity. In this process, the liquid-phase refrigerant and the oil are separated, the lubricating oil is accumulated in the lower portion of the tank main body 5, and the liquid-phase refrigerant is accumulated above the lubricating oil. At this time, the liquid level of the liquid-phase refrigerant is adjusted to a height position at which the liquid level is immersed in a part of the bag 60. Thereby, moisture contained in the liquid-phase refrigerant is absorbed by the desiccant 65 together with moisture (humidity) contained in the gas-phase refrigerant.

The gas-phase refrigerant flows in from the upper end of the outer tube 32 and moves downward in the outer tube 32. Next, the gas-phase refrigerant turns back at the bottom of the outer tube 32, flows into the inner tube 31, and rises in the inner tube 31. At this time, the lubricant oil accumulated in the bottom of the casing 10 is sucked through the flow hole 33a of the lid 33, and the sucked lubricant oil is mixed with the gas-phase refrigerant. The gas-phase refrigerant mixed with the lubricating oil flows out of the refrigerant outflow hole 24 and is supplied to the compressor.

Further, since the bag 60 is held in the posture along the vertical direction, the proportion of the desiccant 65 that contacts the liquid-phase refrigerant accumulated in the tank main body 5 decreases. This reduces vaporization of the liquid-phase refrigerant, thereby reducing noise associated with vaporization.

Next, an example of an assembling method of the reservoir 1 will be described with reference to fig. 3 to 5.

As shown in fig. 3, the head 20, the gas-liquid separating 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 inserted into the through hole 40a of the gas-liquid separation member 40 and the refrigerant outflow hole 24 of the head 20 in this order. Next, the gas-liquid separation member 40 is sandwiched between the head portion 20 and the step portion 31c of the inner tube 31, and in this state, the thin portion 31b is deformed so as to expand in diameter. Thereby, the gas-liquid separating member 40 is mounted on the head 20 together with the double pipe 30. The lid 33 is attached to the lower end portion 32a of the outer pipe 32 by caulking. Then, the filter 50 is fitted to the lower end portion 32a of the outer tube 32.

Next, as shown in fig. 5, the double tube 30 is horizontally disposed, and the bag 60 is placed on the outer tube 32. At this time, the widthwise center of the bag 60 is disposed along the outer tube 32. Specifically, the widthwise center of the bag 60 is disposed along the uppermost position of the outer peripheral surface of the horizontally disposed outer tube 32. Thus, the desiccant-enclosing portions 62, 62 hang down on both sides of the center of the bag 60 in the width direction due to their own weight, and are stably held by the outer tube 32. Then, the bag 60, the double pipe 30, and the gas-liquid separation member 40 are inserted into the casing 10 with the filter 50 as a head. The bag 60 inserted into the housing 10 is held by being sandwiched between the housing 10 and the double pipe 30. Next, the opening 12 is closed with the head 20. Finally, the case 10 and the head 20 are welded and fixedly mounted, and the reservoir 1 is completed.

According to the reservoir 1 of the present embodiment described above, the bag 60 in which the desiccant 65 is sealed is held between the casing 10 and the double pipe 30. This enables the bag 60 to be held without using a binding tape. Therefore, the number of parts and man-hours can be reduced. Further, since the bag 60 is held by the case 10 and the double pipe 30 fixedly attached to the head of the case 10, the possibility of deterioration is reduced compared to the case of using a binding band, and the bag 60 can be effectively prevented from falling off. In particular, since the case 10, the head 20, and the double pipe 30 are made of metal, they have higher rigidity and are less likely to be deteriorated than the synthetic resin binding tape.

The bag 60 has two desiccant-enclosing portions 62, 62 that are defined at the center in the width direction. The thickness T of the desiccant enclosing sections 62, 62 is larger than the distance D from the casing 10 to the outer tube 32 of the double tube 30. This can reliably prevent the desiccant-enclosing sections 62, 62 from slipping out from between the casing 10 and the outer tube 32. Therefore, the detachment of the bag 60 can be effectively suppressed.

Further, an umbrella-shaped gas-liquid separating member 40 is disposed below the head 20. The upper end 60a of the bag 60 is disposed inside the gas-liquid separation member 40. Thus, the gas-liquid separating member can block heat generated when the case 10 and the head 20 are fixedly attached by welding, and can suppress melting of the bag 60 made of synthetic resin nonwoven fabric due to the influence of the heat.

In the above-described embodiment, the bag 60 has the configuration having the two desiccant-enclosing sections 62 divided at the center in the width direction, but the present invention is not limited to this. For example, the bag 60 may be a bag shape having an inner space.

In the above-described embodiment, the double pipe structure is adopted as the refrigerant pipe extending linearly, but a structure adopting, for example, a U-shaped refrigerant pipe disclosed in patent document 1 is also applicable to the present invention. That is, the refrigerant tube that sandwiches the desiccant containing bag together with the casing may include a portion that extends from the head to the bottom of the casing.

Fig. 6 to 8 show a configuration of a tank 1A as a first modification of the tank 1 of fig. 1. Fig. 6 is a longitudinal sectional view, and fig. 7 is a sectional view taken along line a1-a1 of fig. 6. Fig. 8 is a bottom view of the gas-liquid separating member 40A. In fig. 6 to 8, the same components as those of the reservoir 1 are denoted by the same reference numerals, and the description thereof is omitted. In fig. 6, the reinforcing ribs 43 of the gas-liquid separation member 40A are not shown.

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

The gas-liquid separation member 40A is made of metal such as aluminum alloy. The gas-liquid separation member 40A has a peripheral wall 41, an upper wall 42, and a plurality of reinforcing ribs 43. The gas-liquid separation member 40A has two pressing pieces 44A as pressing portions. The pressing piece 44A protrudes from the peripheral wall 41 toward the inside of the gas-liquid separation member 40A. The pressing piece 44A is formed in a rectangular flat plate shape. A pressing piece 44A is formed by bending a part of the lower end of the peripheral wall 41 inward. The pressing piece 44A may be fixed to the peripheral wall 41 by welding or the like. The pressing piece 44A is disposed at a vertical interval from the upper wall portion 42. The pressing piece 44A abuts on the upper end 60a of the bag 60. The two pressing pieces 44A are disposed corresponding to the desiccant sealing portions 62 and 62, respectively. The pressing piece 44A restricts the movement of the bag 60 in the vertical direction. Therefore, the drying agent 65 can be prevented from being pulverized by collision due to the vertical movement of the bag 60. Further, the pressing piece 44A abuts on the upper end portion 60a of the bag 60, and the bag 60 is disposed with a space from the upper wall portion 42. Therefore, it is possible to more effectively suppress the bag 60 from being affected by heat generated when the housing 10 and the head portion 20 are fixedly attached by welding.

Fig. 9 to 11 show a configuration of a tank 1B as a second modification of the tank 1 in fig. 1. Fig. 9 is a longitudinal sectional view, and fig. 10 is a sectional view taken along line a2-a2 of fig. 9. Fig. 11 is a bottom view of the gas-liquid separating member 40B. In fig. 9 to 11, the same components as those of the reservoir 1 are denoted by the same reference numerals, and the description thereof is omitted. In fig. 9, the reinforcing ribs 43 of the gas-liquid separation member 40B are not illustrated.

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

The gas-liquid separation member 40B is made of 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. The gas-liquid separation member 40B has four pressing ribs 44B as pressing portions. The pressing rib 44B protrudes from the peripheral wall 41 and the upper wall 42 toward the inside of the gas-liquid separation member 40B. The pressing rib 44B is formed in a quadrangular flat plate shape. One side of the pressing rib 44B in the vertical direction is connected to the inner circumferential surface of the circumferential wall 41. The upper edge of the pressing rib 44B in the horizontal direction is connected to the lower surface of the upper wall portion 42. The lower edge of the pressing rib 44B in the horizontal direction abuts against the upper end portion 60a of the bag 60. Two pressing ribs 44B of the four pressing ribs 44B are disposed corresponding to the desiccant sealing portions 62, respectively. The pressing rib 44B restricts the movement of the bag 60 in the vertical direction. Further, the lower edge of the pressing rib 44B abuts against the upper end portion 60a of the bag 60, whereby the bag 60 is disposed at a distance from the upper wall portion 42. The reservoir 1B has the pressing rib 44B, and therefore has the same operational effects as the reservoir 1A of the first modification described above.

Fig. 12 and 13 show a configuration of a tank 1C as a third modification of the tank 1 of fig. 1. Fig. 12 is a longitudinal sectional view, and fig. 13 is a sectional view taken along line A3-A3 of fig. 12. In fig. 12 and 13, the same components as those of the reservoir 1 are denoted by the same reference numerals, and description thereof is omitted. In fig. 12, the reinforcing ribs 43 of the gas-liquid separation member 40 are not illustrated.

The accumulator 1C shown in fig. 12 has a double pipe 30C as a refrigerant pipe. The reservoir 1C has the same structure as the reservoir 1 described above, except for the double tube 30C.

The double pipe 30C is made of metal such as aluminum alloy. The double pipe 30C has an inner pipe 31 and an outer pipe 32. The double tube 30C has one pressing piece 34C as a pressing portion. The pressing piece 34C protrudes outward (radially outward of the outer tube 32) from the upper end of the outer tube 32. The pressing piece 34C is formed by bending a four-corner flat plate-shaped projecting piece projecting upward from the upper end of the outer tube 32 outward. The pressing piece 34C may be fixedly attached to the outer tube 32 by welding or the like. The pressing piece 34C and the upper wall portion 42 are arranged with a gap in the vertical direction. The pressing piece 34C abuts on the upper end 60a of the bag 60. The pressing piece 34C is disposed to correspond to the joint 61 between the desiccant sealing portions 62 and 62. The pressing piece 34C restricts the movement of the bag 60 in the vertical direction. Further, the pressing piece 34C abuts on the upper end portion 60a of the bag 60, and the bag 60 is disposed with a space from the upper wall portion 42. The liquid reservoir 1C has the pressing piece 34C, and therefore has the same operational effects as the liquid reservoir 1A of the first modification described above.

Fig. 14 and 15 show a configuration of a tank 1D as a fourth modification of the tank 1 of fig. 1. Fig. 14 is a longitudinal sectional view, and fig. 15 is a sectional view taken along line a4-a4 of fig. 14. In fig. 14 and 15, the same components as those of the reservoir 1 are denoted by the same reference numerals, and description thereof is omitted. In fig. 14, the reinforcing ribs 43 of the gas-liquid separation member 40 are not illustrated.

The accumulator 1D shown in fig. 14 has a double pipe 30D as a refrigerant pipe. The reservoir 1D has the same structure as the reservoir 1 described above, except for the double tube 30D.

The double pipe 30D is made of metal such as aluminum alloy. The double pipe 30D has an inner pipe 31 and an outer pipe 32. The double tube 30D has two pressing pieces 34D as pressing portions. The pressing piece 34D protrudes outward (radially outward of the outer tube 32) from the upper end of the outer tube 32. The pressing piece 34D is formed by bending a four-corner flat plate-shaped projecting piece projecting upward from the upper end of the outer tube 32 outward. The pressing piece 34D may be fixedly attached to the outer tube 32 by welding or the like. The pressing piece 34D and the upper wall portion 42 are arranged with a gap in the vertical direction. The pressing piece 34D abuts on the upper end 60a of the bag 60. The two pressing pieces 34D are disposed corresponding to the desiccant sealing portions 62 and 62, respectively. The pressing piece 34D restricts the movement of the bag 60 in the vertical direction. Further, the pressing piece 34D abuts on the upper end portion 60a of the bag 60, and the bag 60 is disposed with a space from the upper wall portion 42. The liquid reservoir 1D has the pressing piece 34D, and therefore has the same operational effects as the liquid reservoir 1A of the first modification described above.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the embodiments. It is to be understood that the embodiments described above are included in the scope of the present invention by those skilled in the art, as long as the features of the embodiments are appropriately combined with or added to or removed from the constituent elements, the design changes, and the like, without departing from the spirit of the present invention.

Claims (7)

1. A reservoir, having: a cylindrical housing having an opening and a bottom; a head portion fixedly attached to the opening portion; a bag that is housed in the case and that encloses a desiccant; and a refrigerant pipe configured to extend from the head portion toward the bottom portion, the accumulator being characterized in that,

the bag is held by being sandwiched by the housing and the refrigerant tube.

2. The reservoir of claim 1,

the pouch has two desiccant-enclosing sections divided from each other at the center in the width direction,

the desiccant enclosing section has a thickness larger than a distance from the casing to the refrigerant tube.

3. Reservoir according to claim 1 or 2, characterized in that

An umbrella-shaped gas-liquid separation member is disposed below the head,

the upper end of the bag is disposed inside the gas-liquid separation member.

4. Reservoir according to claim 3,

the gas-liquid separation member includes: a peripheral wall portion; an upper wall portion provided continuously with an end portion of the peripheral wall portion on the head portion side; and a pressing portion protruding inward from the peripheral wall portion or the upper wall portion,

the pressing portion abuts against an upper end portion of the bag to restrict movement of the bag in the vertical direction.

5. Reservoir according to any one of claims 1 to 3,

the refrigerant pipe has: an inner tube; an outer tube, the inner tube being disposed inside the outer tube; and a pressing portion projecting outward from the outer tube,

the pressing portion abuts against an upper end portion of the bag to restrict movement of the bag in the vertical direction.

6. A method for assembling a liquid reservoir,

a refrigerant pipe attached to the head is horizontally arranged, a bag in which a desiccant is sealed is placed on the refrigerant pipe,

inserting the refrigerant tube and the bag into a cylindrical housing, and clamping the bag by the housing and the refrigerant tube,

the opening of the housing is closed with the head, and the head is fixedly attached to the opening.

7. The method of assembling a reservoir of claim 6,

the pouch has two desiccant-enclosing sections divided from each other at the center in the width direction,

when the bag is placed on the refrigerant tube, the center of the bag in the width direction is arranged along the refrigerant tube.

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