JPH094945A - Receiver dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce in size and simplify the structure of a receiver dryer mounted in an automobile air conditioner. SOLUTION: The receiver dryer 1 comprises a cylindrical body 10 with a bottom, and a head member 30 for sealing the upper part of the body. A drying chamber 20 having desiccant 22 for holding filters 40, 50 and nonwoven fabrics 42, 52 is formed at the upper part of the body 10, and a liquid refrigerant chamber 24 is provided under the chamber 20. A refrigerant flow inlet is provided at the member 30, and an outlet 14 of the refrigerant is provided at the bottom 12 of the body. Since the entire interior space of the body 10 can be used as a drying chamber and a liquid refrigerant tank, the dryer can be reduced in size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver dryer for a car air conditioner used for a vehicle cooling system to temporarily store a liquid phase refrigerant.

[0002]

2. Description of the Related Art For example, Japanese Laid-Open Patent Publication No. 6-249550 discloses a receiver dryer for a car air conditioner. The receiver dryer disclosed in the above publication has a tank with an open upper end, a filter locking portion at an intermediate position in the height direction, a refrigerant suction pipe arranged in the center of the tank, and a refrigerant suction passage. A receiving member that has a hole, is attached to the lower end of the suction pipe, is in contact with the center of the bottom surface of the tank, and supports the suction pipe in the center of the tank; A filter portion supported on the filter locking portion of the pipe and held in the tank, a refrigerant inlet port and an outlet port, and a central joint port that communicates with the outlet port and is fitted into the upper end portion of the suction pipe. And a head fitted to and fixed to the upper end opening of the tank, which has a seal member that hermetically seals the upper end of the suction pipe at the joint opening.

[0003]

In the conventional receiver dryer described above, since both the inlet and outlet of the refrigerant are arranged in the head portion on the upper surface of the receiver dryer,
It is convenient for piping. This advantage is particularly advantageous in the case of piping to a receiver dryer installed as an option, especially when the car air conditioner is an optional device. However, in recent years, standard installation of car air conditioners has advanced, and car air conditioners have been built into the engine room from the beginning. In the case of such a car air conditioner as standard equipment, the degree of freedom of piping and the like increases, and it is not necessary to provide an inlet and an outlet at the head portion of the receiver dryer. When the degree of freedom in the arrangement positions of the refrigerant inlet and outlet is increased, the structure of the receiver dryer main body can be simplified, which contributes to resource saving. The present invention provides a receiver dryer that removes water in a refrigerant with a simple structure.

[0004]

SUMMARY OF THE INVENTION A receiver dryer according to the present invention includes a bottomed cylindrical main body having an upper opening, a drying chamber and a liquid phase refrigerant chamber defined in the main body, and an opening of the main body. A head member for sealing is provided, and a refrigerant inlet provided in the head member and a refrigerant outlet provided in the bottom portion of the main body are provided.

[0005]

[Function] The refrigerant flows in from the head of the cylindrical receiver dryer and passes through the filter member and the drying chamber to remove water and contaminants, and is discharged from the bottom outlet, so that the structure is simplified. As a result, the flow of the refrigerant becomes smooth.

[0006]

1 shows a top view and a cross-sectional side view of a receiver dryer of the present invention. The receiver dryer, generally designated by reference numeral 1, is a bottomed cylindrical body 1 with an open top.
Has zero. The main body is manufactured by extruding an aluminum alloy, for example, and a refrigerant outlet 14 is formed in the bottom portion 12. A bolt hole 15 for mounting the receiver dryer 1 is provided in the center of the bottom portion 12. An inwardly projecting portion 16 is formed at the center of the cylindrical main body 10 by rolling or the like. Body 10
Is made of aluminum alloy or the like, the protrusion 16 can be easily processed.

A disk-shaped lower filter member 40 is placed on the projecting portion 16 of the main body 10, and below the lower filter member 40, a liquid-phase refrigerant chamber 2 containing a liquid-phase refrigerant 28 is placed.
4 is defined. The lower filter member 40 placed on the protrusion 16 may be, for example, a metal plate having many small holes called punching metal. A holding member 4 made of non-woven fabric or the like is provided above the lower filter member 40.
The desiccant 22 is filled through the nozzle 2. An upper filter member 50 is placed on the upper portion of the drying chamber 20 filled with the desiccant 22 via a holding member 52 made of non-woven fabric or the like. Like the lower filter member 40, the upper filter member 50 is made of punching metal or the like.

A head member 30 is inserted into the upper opening of the cylindrical main body 10 and fixed by welding means 36 or the like. The head member 30 is a disk-shaped member made of an aluminum alloy or the like of the same material as the main body 10, and has a refrigerant inlet 32.
Having. A bolt hole 34 for mounting the receiver dryer 1 is provided at the center of the head member 30.

The refrigerant sent from the cooling system flows into the main body 10 through the inlet 32 of the receiver dryer 1. The refrigerant that has flowed in passes through the opening of the upper filter 50, passes through the non-woven cloth 52, and is sent to the drying chamber 20. A desiccant 22 having a hygroscopic property is filled in the drying chamber 20 and is preloaded by a spring 60. The water mixed in the refrigerant is adsorbed by the desiccant, and the refrigerant from which the water is removed flows down into the liquid-phase refrigerant chamber 24 through the lower non-woven cloth 42 and the lower filter member 40.

An example of the shape of the slit formed in the lower filter member 40 is shown in FIG. 4 with a front view and a side view of a cross section AB. The refrigerant passing through the drying chamber 20 and the lower non-woven fabric 42 collides with the protrusion 43 formed in the shape of an armored door in a constant direction on the circumference, and is blown out in a constant direction from the notch 44 to generate a swirling flow. It is molded to be. By this action, the liquid-phase refrigerant 28 falls along the peripheral wall of the liquid-phase refrigerant chamber 24, and it is possible to prevent noise and the like from being generated. In addition, when the liquid surface 28a of the liquid-phase refrigerant 28 swells, a problem that gas in the liquid-phase refrigerant chamber 24 is mixed occurs. In order to prevent this ripple, a mesh plate member 25 may be provided as a floating lid on the liquid surface 28a. The refrigerant chamber 28 is delivered to the cooling system via the outlet 14.

As described above, the receiver dryer of the present invention has the inlet and outlet of the refrigerant arranged in a straight line and the refrigerant flows in one direction, so that the structure is simplified and the installation space of the car air conditioner is small. it can. Moreover, since the entire internal space of the main body 1 can be used, a receiver dryer having the same capacity can be manufactured in a small size.

FIG. 2 is a three-view drawing showing another embodiment of the structure of the refrigerant outlet provided in the lower portion of the main body 10. In this embodiment, the flat surface 8 is formed on the side surface of the bottom portion 12 of the main body 1.
0 is formed, and the flat surface 80 is provided with the outflow port 82 and the mounting bolt hole 84. With this configuration,
The degree of freedom of the mounting structure of the receiver dryer increases, and piping becomes easier.

FIG. 3 shows an example of an arrangement structure of the refrigerant delivery pipe 90 provided in the receiver dryer, and also shows a bracket 100 for fixing the delivery pipe 90 to the main body 10. The bracket 100 is made of a material such as plastic and holds the main body 10 and the pipe 90.

FIG. 5 is a sectional view showing another embodiment of the receiver dryer of the present invention, FIG. 6 is a top view and FIG. 7 is a bottom view. The receiver dryer 1A has a pipe-shaped main body 10 made of aluminum alloy, and a flange member 130 is fixed to the lower end surface by welding means 135. The flange member 130 has an opening 132 and a screw hole 134 for mounting, and the opening 1
32 forms an outlet flow path for the refrigerant. A flange member 30, which is a head member, is fixed to the upper end surface of the main body 10 by welding means 35. The flange member 30 has an opening 32 and a screw hole 34 for attachment, and the opening 32 forms an inlet passage of the refrigerant.

The lower filter member 40 is fixed in the main body 10. The lower filter member 40 is subjected to rolling processing 150 from the outside of the main body 10 and has a protruding portion 152 inward.
By forming, the support portion of the lower filter 40 is formed. A holding member 4 made of non-woven fabric on the lower fill 40
The two are stacked and filled with the desiccant 22. The upper filter member 50 is inserted on the upper surface of the desiccant 22 via the holding member 52 to form the drying chamber 20.

The upper filter member 50 has a cup-shaped peripheral wall, and is fixed to the main body 10 by forming a caulking portion 154 by a caulking device with the peripheral wall portion facing from the inside to the outside. By performing the caulking process from the inner side to the outer side, the protruding portion 156 is formed on the outer side of the main body 10. Although the number of the crimp portions 154 can be appropriately selected, four crimp portions 154 are provided in this embodiment. With this configuration, the portion of the lower filter 40 that receives a strong pressure in the main body 10 can be firmly fixed.

FIG. 8 is an explanatory view showing a fixing means for the lower filter member 40 and the upper filter member 50. That is, the cylindrical main body 10 is inserted into the cylindrical mounting jig 200, and the lower filter member 40 is placed on the jig 200. In this state, the rolling processing tool 210 is used to perform rolling processing on the outside of the main body 10 to fix the lower filter member 40 to the main body 10. Next, the upper filter member 50 has a caulking tool 220 inside the main body 10.
Insert the upper filter member 50 into the main body 10 by caulking the upper filter member 50 from the inside toward the outside.
Fixed against.

FIG. 9 is a cross-sectional view of a main part showing still another embodiment of the present invention. The neck portion 250 of the main body 10 is formed by drawing, and the cast head member 260 is attached to the welding means 265.
Fix with. The head member 260 has a refrigerant inlet port 26.
2 and a screw hole 264 for mounting. By reducing the outer diameter dimension of the attachment portion to the head member 260 by the neck portion 250, the welding means 265 can be made small and the number of processing steps can be reduced.

FIG. 10 is a cross-sectional view of a main part showing still another embodiment of the present invention. The neck portion 250 of the main body 10 is formed by drawing, and the pipe member 270 is fixed by the welding means 275. The head member 280 is fixed to the pipe member 270 by a bulging portion 272 and a pipe expanding portion 274. Since the head member 280 has a flat plate shape, it can be manufactured by a processing means other than casting.

[0020]

As described above, the receiver dryer of the present invention defines the drying chamber in which the desiccant is filled in the cylindrical main body and the liquid-phase refrigerant chamber for storing the liquid-phase refrigerant, and the refrigerant inlet port. By arranging the outflow port on the top and bottom of the main body, the space of the main body is efficiently used and the miniaturization is achieved. Moreover, the structure is simple, and the materials can be effectively used.
Furthermore, it is possible to prevent the liquid-phase refrigerant from undulating and prevent gas from being mixed.

[Brief description of drawings]

FIG. 1 is a top view and a sectional view showing an embodiment of a receiver dryer of the present invention.

FIG. 2 is a sectional view, a side view, and a bottom view showing another embodiment of the receiver dryer of the present invention.

FIG. 3 is an explanatory view showing the piping of the refrigerant delivery pipe and the holding bracket of the receiver dryer of the present invention.

FIG. 4 is an explanatory diagram showing a specific structure of a lower filter 40.

FIG. 5 is a cross-sectional view showing another embodiment of the receiver dryer of the present invention.

FIG. 6 is a top view showing another embodiment of the receiver dryer of the present invention.

FIG. 7 is a bottom view showing another embodiment of the receiver dryer of the present invention.

FIG. 8 is an explanatory view showing a fixing means for the lower filter member and the upper filter member.

FIG. 9 is a cross-sectional view of a main part showing still another embodiment of the present invention.

FIG. 10 is a cross-sectional view of a main part showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Receiver Dryer 10 Main Body 12 Bottom 14 Refrigerant Outlet 20 Drying Room 22 Desiccant 24 Liquid Phase Refrigerant Chamber 25 Floating Lid 28 Liquid Phase Refrigerant 30 Head 32 Refrigerant Inlet 40 Lower Filter Member 50 Upper Filter Member 60 Spring

Claims (7)

[Claims] 1. A receiver dryer for a vehicle cooling system for temporarily storing a liquid-phase refrigerant, comprising: a bottomed cylindrical main body having an upper opening; and a drying chamber defined in the main body. A receiver dryer having a liquid-phase refrigerant chamber and a head member that seals the opening of the main body, and including a refrigerant inlet provided in the head member and a refrigerant outlet provided in the bottom of the main body. 2. The drying chamber is provided with a first filter member that holds a desiccant and faces the liquid-phase refrigerant chamber, and a second filter member that faces the head member. Receiver dryer. 3. The means for supporting the first filter member comprises:
The receiver dryer according to claim 1, wherein the receiver dryer is a protrusion formed inside the main body. 4. The receiver dryer according to claim 1, further comprising a spring provided between the second filter member and the head member. 5. The receiver dryer according to claim 1, further comprising a plate member floating on the liquid surface of the refrigerant in the liquid-phase refrigerant chamber. 6. The receiver dryer according to claim 1, wherein a refrigerant outlet is provided in a side wall portion of a bottom portion of the main body. 7. A tubular main body having both ends open, a flange member fixed to the opening of the main body, a refrigerant inlet formed in the first flange member, and a second flange member. A refrigerant outlet, a drying chamber and a liquid-phase refrigerant chamber defined in the main body, and the drying chamber includes two filter members fixed in the main body and 2
A receiver dryer having a desiccant filled between individual filter members, and the two filter members being fixed to the main body by rolling processing means and caulking processing means.