JPH06249550A - Receiver dryer for car air conditioners - Google Patents

Abstract

PURPOSE:To make assembling simple with a small manhour and dissolve a problem, in which a refrigerant suction pipe disengages from and drops off a header, by having a header fitted into and secured to an opening at a top of a tank such that a central joint port of the header is assembled to be closely fitted onto an upper end portion of the suction pipe. CONSTITUTION:A refrigerant suction pipe 23 and a filter section 40 are placed in a tank 1, and a header 31 is fitted into and secured to an opening at a top of the tank such that a central joint port 34 of the header is assembled to be closely fitted onto an upper end portion of the suction pipe 23. Mounted to a lower end portion of the refrigerant suction pipe 23 is a bearing member 24 which has a through hole 27 for suction of a refrigerant and abuts against a bottom surface 22 of the tank to support the refrigerant suction pipe 23 centrally of the tank. Therefore, assembling is made simple with a small manhour, and a problem, in which the refrigerant suction pipe 23 disengages from and drops off the header 31, can be dissolved.

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 in a vehicle cooling system and temporarily storing a liquid phase refrigerant.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional receiver dryer used in a vehicle cooling system, in which a cartridge-shaped filter portion 3 is provided at an intermediate position inside a tank 1 having an open upper end.
The filter part 3 is provided with a desiccant 2 for removing water in the refrigerant, a lower filter 3a such as felt for removing dust and an upper filter 3a ', and a mesh for incorporating them. It is composed of a circular container body 3b having a large number of small holes and a lid body 3c.

Reference numeral 5 denotes a refrigerant suction pipe penetrating the center hole of the filter portion 3, which has a filter locking portion 4 (formed by a tube bulging portion) for locking the container 3b, and the lid. Body 3c
The filter portion 3 is fixed to the refrigerant suction pipe 5 by a retaining ring 3d fitted in the upper position of the.

The upper end 12 of the suction pipe 5 is liquid-tightly fixed to the header 6 by applying a sealing agent and then expanding the pipe from above. Then, the suction pipe 5 and the cartridge-shaped filter portion 3 locked on the filter locking portion 4 of the suction pipe 5 are suspended from the header 6 in a suspended state and inserted into the tank 1. .

The header 6 has an inflow port 8 to which a refrigerant suction pipe 7 is connected and an outflow port 10 to which a refrigerant discharge pipe 11 is connected. The header 6 is fitted into the upper end opening of the tank 1 as shown in FIG. Are fixed by welding.

The liquid refrigerant flowing into the tank 1 through the suction pipe 7 and the inflow port 8 passes through the filter portion 3 and is temporarily stored in the lower portion of the tank 1. The liquid refrigerant stored in the lower portion of the tank is connected to the lower end opening 9 of the suction pipe 7.
It is sucked out from (separated from the bottommost portion 13 of the bottom surface of the tank 1), passes through the outlet 10 of the header 6, and is discharged into the discharge pipe 11.
It further flows out, reaches a evaporator through a temperature expansion valve (not shown), etc. and evaporates.

[0007]

In the conventional receiver dryer, the filter unit 3 is preassembled as a cassette as described above, and the cassette is locked to the suction pipe 5 and suspended in the air. Expand the upper end 12 to expand the header 6
Need to be firmly fixed to the
If the expansion of the suction pipe 5 causes generation of harmful fine powder in the cooling cycle, and if the expansion work is insufficient, the refrigerant suction pipe 5 that suspends the filter part 3 comes off the header 6 and falls into the tank 1, There is a problem that the liquid refrigerant cannot be sucked out.

An object of the present invention is to provide a receiver dryer for a car air conditioner which is simpler to assemble and requires less man-hours as compared with the conventional one, and can solve the problem that the refrigerant suction pipe comes off from the header.

[0009]

To achieve the above object, a receiver dryer according to the present invention has a tank 1 having an open upper end and a filter engaging portion 4 at an intermediate position in the height direction. A refrigerant suction pipe 23 arranged at the center of
A receiving member 24 that has a through hole 27 for sucking the refrigerant and is attached to the lower end of the suction pipe 23 and abuts on the central portion 22 of the bottom surface of the tank 1 to support the suction pipe 23 in the central portion of the tank.
And a filter part 40 filled with a desiccant 30 and supported on the filter locking part 4 of the suction pipe 23 and held in the tank 1, a refrigerant inlet 32 and an outlet 33 and the outlet. To the upper end opening of the tank 1 which has a central joint opening 34 which is connected to the upper end of the suction pipe 23 and which is provided with a sealing member 36 for hermetically sealing the upper end of the suction pipe 32. The header 31 is fitted and fixed.

The filter portion 40 has a large number of small holes for liquid passage and is fitted and held on the filter locking portion 4 of the suction pipe 23, and is placed on the holding plate 28a. Lower filter 29, a predetermined amount of desiccant 30 filled on the filter, and an upper filter 2 covering the desiccant.
9a and a holding plate 28b which has a large number of liquid passage holes and which is attached on the upper filter 29a.

[0011]

According to the receiver dryer having the above structure, the refrigerant suction pipe 23 and the filter portion 40 are set in the tank 1,
The header 31 can be fitted and fixed to the upper end opening of the tank so that the central joint opening 34 of the header is tightly fitted to the upper end of the suction pipe 23. It is easier to assemble and requires less man-hours than the conventional receiver dryer that is fixed to.

In the receiver dryer assembled as described above, a receiving member 24 having a through hole 27 for sucking the refrigerant is attached to the lower end of the refrigerant sucking pipe 23, and the receiving member 24 is attached to the tank bottom 22. Since the suction pipe 23 is in contact with and supports the suction pipe 23 at the center of the tank, the load of the suction pipe 23 and the filter portion 40 locked by the suction pipe can be supported by the receiving member 24. Even if the structure in which the upper end of the pipe 23 is fitted into the central joint opening 34 of the header 31 and sealed by the seal member 36 is adopted, the problem that the refrigerant suction pipe 23 falls off from the header 31 can be solved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS.

In FIG. 1, reference numeral 1 is a tank having an open upper end, and the tank 1 has a cylindrical shape, and a bottom surface 21 thereof is formed in a substantially slender shape having a tapered inclined surface 22a facing a flat central portion 22. There is. Reference numeral 23 is a refrigerant suction pipe arranged in the center of the tank 1, and a filter locking portion 4 is bulged at an intermediate position in the height direction.

Reference numeral 24 is a receiving member attached to the lower end of the suction pipe 23, and a hole inner end step portion 26 is provided at the lower end of the suction pipe 23.
Through hole 27 (a lateral through hole communicating with the lower end portion of the mounting hole 25) formed of a mounting hole 25 fitted so as to abut with the mounting hole 25 and a lower end concave groove of a side opening communicating with the mounting hole 25. 2) and a lower end inclined surface 24a guided and stopped along the inclined surface 22a to the flat central portion 22 to form a suction pipe mounting member having a shape as shown in FIG.
The receiving member 24 which is the suction pipe mounting member is attached to the tank 1
The suction pipe 23 is supported at the center of the tank by abutting on the center 22 of the bottom surface of the tank as shown in FIG.

Reference numeral 40 is a filter locking portion 4 of the suction pipe 23.
A filter portion supported above and held in the tank 1, which is formed of a disc such as a punching metal or a mesh body having a large number of small holes for liquid passage, and a central hole is inserted into the suction pipe 23 to lock the filter. A holding plate 28a locked on the portion 4, a lower filter 29 such as felt for removing dust in the refrigerant placed on the holding plate, and a refrigerant filled on the lower filter. Predetermined amount of desiccant 3 to remove water from inside
0, an upper filter 29a such as felt for covering the desiccant 30 to remove dust in the refrigerant, and a central hole formed of a disc such as a punching metal or a net having a large number of small holes for liquid passage. The upper filter 2 by inserting the
9a and a pressing plate 28b attached to the surface 9a.

The holding plate 28a and the holding plate 28b are provided with flanges on the outer peripheral portion and the central hole portion, and the outer peripheral flange surface is in contact with the inner peripheral surface portion of the tank 1. The holding plate 28a and the holding plate 28b do not need to have the brim. In addition, the lower filter 29 and the upper filter 2
The outer diameter of 9a is slightly larger than the inner diameter of the tank 1, and the outer diameter is elastically contracted to be inserted into the tank 1.
It is also possible to make the outer diameter of a substantially the same as the inner diameter of the tank 1.

Reference numeral 31 denotes a header which is fitted into the upper end opening of the tank 1 and whose tank joint is fixed by welding as shown in FIG. 1. This header 31 is a flow for mounting a refrigerant inflow pipe (not shown). It has an inlet 32, an outlet 33 for attaching a refrigerant discharge pipe (not shown), and a central joint opening 34 communicating with the outlet 33 and fitted into the upper end of the suction pipe 23. A sealing member 36 such as an O-ring that hermetically seals the upper end of the suction pipe 23 is provided inside the mouth 34,
The lower end portion 35 of the joining port 34 is fixed by caulking as shown in FIG. Therefore, when the header 31 is fitted into the upper end opening of the tank 1, the upper end of the suction pipe 23 is fitted into the inner hole 37 of the joint port 34 and hermetically sealed by the seal member 36.

The header 31 has a shape shown in FIG. 4 (a) in FIG. 1, but the present invention is not limited to this, and the shape or shape shown in FIG. 4 (b) is used. The header 31 having the shape shown in FIG. 4C can be commonly applied.

In order to assemble the receiver dryer having the above structure, the suction pipe 23 having the receiving member 24 attached to the lower end thereof.
Then, the suction plate 2 in which the holding plate 28a and the lower filter 29 are inserted from the upper end thereof to be locked on the filter locking portion 4, and the holding plate 28a and the lower filter 29 are fitted and held.
When 3 is inserted into the tank 1 from the upper end opening, the lower end of the suction pipe 23, that is, the portion of the receiving member 24 slides down along the inclined surface 22a of the tank bottom 21, and at the flat central portion 22 of the tank bottom 21. Stop. On the other hand, due to the elasticity of the filter 29, the upper portion of the suction pipe 23 is positioned at the center of the tank 1. Next, a predetermined amount of desiccant 30 is filled on the lower filter 29 from the upper end opening of the tank 1, the upper filter 29a and the holding plate 28b are covered, and the header 31 is fitted into the upper end opening of the tank 1. .

In this case, since the upper end of the suction pipe 23 is positioned at the center of the tank 1, the upper end of the suction pipe 23 is fitted in the inner hole 37 of the header center joint port 34 and a sealing member such as an O-ring. 36 is hermetically sealed. Further, the receiving member 24 ensures an appropriate gap as shown in FIG. 1 between the flat central portion 22 of the tank bottom surface 21 and the lower end portion of the suction pipe 23.

After the header 31 is fitted in the upper end opening of the tank 1, the joint with the tank 1 is fixed by welding or the like to seal the tank 1. Therefore, the liquid refrigerant in the gas-liquid two-phase refrigerant flowing from the inflow port 32 is filtered by the filter unit 40.
Water and dust are removed by passing through, and the liquid refrigerant 39 is stored in the lower portion of the tank 1.

The liquid refrigerant 39 is passed through the through hole 27 of the receiving member 24.
Through the suction pipe 23 and the outflow port 33, and is supplied to a temperature expansion valve or the like (not shown). The gaseous refrigerant stored in the upper portion of the tank 1 does not leak to the outlet 33 side because the joint between the upper end of the suction pipe 23 and the header 31 is airtight. Although the shape of the tank 1 is cylindrical in the above-described embodiment, the shape is not necessarily cylindrical, and the header 31, the filter section 40, and the like may be matched to the shape of the tank.

[0024]

According to the receiver dryer for a car air conditioner of the present invention, the refrigerant suction pipe 23 and the filter portion 40 are set in the tank 1, and the header 3 is provided at the upper opening of the tank 1.
1 can be assembled and fixed so that the central joint opening 34 of the header 31 is closely fitted to the upper end portion of the suction pipe 23, and the conventional receiver dryer that expands the upper end portion of the suction pipe and fixes it to the header. Compared with, it has the advantages that it is easier to assemble and requires less man-hours.

In the receiver dryer assembled as described above, the receiving member 24 having the through hole 27 for sucking the refrigerant is attached to the lower end of the refrigerant sucking pipe 23, and the receiving member 24 is attached to the tank bottom 22. Since the suction pipe 23 is in contact with and supports the suction pipe 23 at the center of the tank, the load of the suction pipe 23 and the filter portion 40 locked by the suction pipe can be supported by the receiving member 24, An appropriate gap between the pipe 23 and the bottom of the tank can be secured by the receiving member 24. Therefore, even if the structure in which the upper end portion of the suction pipe 23 is fitted into the center joint port 34 of the header 31 and sealed by the seal member 36 is adopted, the refrigerant suction pipe 23 is
It is possible to solve the problem of falling off.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing a receiver dryer for a car air conditioner according to an embodiment of the present invention.

FIG. 2 is a perspective view of a receiving member attached to the lower end portion of the suction pipe of the receiver dryer.

FIG. 3 is an enlarged cross-sectional view of a main part showing a header center joint port of the receiver dryer.

FIG. 4 is a vertical cross-sectional view of various headers applied to the receiver dryer.

FIG. 5 is a central longitudinal sectional view showing a conventional receiver dryer.

[Explanation of symbols]

1 ... Tank, 4 ... Filter locking portion, 21 ... Tank bottom,
22 ... Central part of bottom surface of tank, 22a ... Sloping surface, 23 ... Refrigerant suction pipe, 24 ... Receiving member, 27 ... Refrigerant suction hole,
28a ... Retaining plate, 28b ... Holding plate, 29 ... Lower filter, 29a ... Upper filter, 30 ... Desiccant, 31 ... Header, 32 ... Refrigerant inflow port, 33 ... Refrigerant outflow port, 34 ...
Central joint port of header, 36 ... Seal member, 39 ... Liquid refrigerant, 40 ... Filter section.

Claims (2)

[Claims] 1. A receiver dryer for a car air conditioner used in a vehicle cooling system for temporarily storing a liquid-phase refrigerant, comprising a tank having an open upper end and a filter locking portion at an intermediate position in the height direction. The refrigerant suction pipe disposed in the center of the tank and the through hole for refrigerant suction are attached to the lower end of the suction pipe and contact the center of the bottom surface of the tank to bring the suction pipe into the center of the tank. A receiving member that supports the filter unit, a filter unit that is filled with a desiccant, is supported on the filter locking unit of the suction pipe and is held in the tank, and communicates with the refrigerant inlet and outlet and the outlet. And a header fitted and fixed to the upper end opening of the tank, which has a central joint that is fitted and inserted into the upper end of the suction pipe and has a sealing member that hermetically seals the upper end of the suction pipe at the joint. Car air conditioner receiver equipped Dryer. 2. A holding plate in which the filter portion has a large number of liquid passage small holes and is fitted and held on the filter locking portion of the suction pipe, a lower filter placed on the holding plate, and The filter is composed of a predetermined amount of desiccant, an upper filter that covers the desiccant, and a holding plate that has a large number of liquid passage holes and is attached to the upper filter. The receiver dryer for a car air conditioner according to claim 1, wherein