JPH10267473A - Liquid receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the sealing property between a dryer unit and a vapor- liquid separation tank by constituting the dryer unit for constituting a liquid receiver being provided in the vapor-liquid separation tank with a cut-shaped container for accommodating a desiccant and forming a suction pipe where the refrigerant passes in one piece at the cup-shaped container. SOLUTION: In a liquid receiver that is constituted by providing a drier unit in a vapor-liquid separation tank, a cut-shaped container 2 for accommodating the desiccant of the drier unit is provided by forming a suction pipe 10 where a refrigerant passes and a synthetic resin in one piece. A lid body 14 that is placed at an opening edge part 6 of the cup-shaped container 2 is formed by a bottom wall 15 where a through hole where a number of refrigerants flow is opened, an opening 16 for inserting the suction pipe, and an engagement part 17. Then, when the drier unit is assembled, a filter is inserted into a bottom wall 3 of the cup-shaped container 2, a desiccant is accommodated and then a filter is loaded again, the lid body 14 is pushed into the opening edge part 6 of the container 2, and an engagement projecting part is engaged to the lid body 14 of the engagement recessed groove 8 of the container 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid receiver comprising a gas / liquid separation tank having at least a refrigerant inlet and an outlet, and a dryer unit provided in the tank. .

[0002]

2. Description of the Related Art As is well known, a liquid receiver used in a refrigeration cycle such as a car air conditioner includes a tank for separating gas and liquid, and a dryer unit provided in the tank. ing. The dryer unit itself is well known in the art without mentioning a document name, and is configured as shown in FIG. 4, for example. That is, as shown in FIG. 4A, the dryer unit 50 has a cup-shaped container 51, a disc-shaped filter 53, and a larger diameter than the opening of the cup-shaped container 51. It is composed of a plurality of components such as a seal filter 54, a cover 55, and a suction pipe 57. The bottom plate and the cover 55 of the cup-shaped container 51 are provided with a plurality of small holes for refrigerant flow.

In assembling, a cup-shaped container 51, a disc-shaped filter 53, a seal filter 54, and a cover 55 are inserted into a suction pipe 57 in this order. Then, a disc-shaped filter 53 is positioned at the bottom of the cup-shaped container 51 to store the desiccant 60, and the edge 52 ′ of the opening 52 of the cup-shaped container 51 is wrapped by the seal filter 54 and folded. Then, the cover 55 is pushed in. Thereby, the cup-shaped container 51, the disc-shaped filter 53, the seal filter 54, and the cover 55 are integrated. Then, the suction tube 57 has a projection 58 formed by beading or the like.
Is formed, the suction pipe 57 is caulked and deformed at the position 59 of the bottom plate of the cup-shaped container 51 in a state where the cover 55 integrated with the projection 58 abuts. Thereby, the integrated components are positioned on the suction pipe 57, and the dryer unit 50 is configured. This state is shown in FIG.
(B).

[0004] The dryer unit 50 assembled as described above is inserted into a gas / liquid separation tank (not shown), and a header is formed in an opening above the gas / liquid separation tank by electromagnetic molding or the like. When attached, the receiver is configured. The header is provided with a refrigerant inlet passage, a refrigerant outlet passage communicating with the suction pipe 57, and the like, as is well known.
A pressure gauge, sight glass, etc. are also attached. Therefore, the moisture of the refrigerant that has entered the gas / liquid separation tank from the condenser through the refrigerant inlet passage is removed while passing through the dryer unit 50. Further, the liquid is separated into gas and liquid in the gas / liquid separation tank, and only the liquid is sucked up from the suction pipe 57 and sent to the evaporator through the refrigerant outlet passage.

[0005]

As described above, the conventional dryer unit 50 has no functional problem if the receiver is constructed in combination with the gas / liquid separation tank.
However, there is a disadvantage that the manufacturing cost is high. That is, the conventional dryer unit 50 includes a plurality of components such as the cup-shaped container 51, the filter 53, the seal filter 54, the cover 55, and the suction pipe 57 as described above. The disadvantage is that the production costs are high, since they have to be produced individually and the parts produced individually have to be assembled in order. In particular, the seal filter 54 needs to be bent so as to wrap around the edge 52 ′ of the opening 52 of the cup-shaped container 51, and the integrated cup-shaped container 51 and the cover 55
In order to position the suction pipe 57 and the like, a step of crimping and deforming the suction pipe 57 at the position 59 is also required, which increases the cost as a whole. Further, there is a problem of sealing when the dryer unit 50 is provided in the gas / liquid separation tank, and there is also a problem of positioning of the dryer unit 50, such as fixing and displacement. The present invention seeks to provide a liquid receiver that solves the above-mentioned drawbacks, problems, and the like. Specifically, a seal filter that has a small number of parts and causes a high cost during assembly is provided. It is an object of the present invention to provide a liquid receiver that does not require an assembling process such as a bending process such as folding back, a caulking applied to a suction pipe, and a deformation process. Another invention provides, in addition to the above object, a liquid receiver in which the sealability between a dryer unit and a gas / liquid separation tank is improved, and the dryer unit is reliably positioned at a predetermined position. It is intended to be.

[0006]

According to the present invention, in order to achieve the above object, a cup-shaped container and a suction pipe, which are components of a dryer unit, are in close contact with each other when a lid is attached to the cup-shaped container. It is integrally formed of a synthetic resin so as to have a fitting portion that fits. That is, in order to achieve the above object, the present invention provides a liquid receiver comprising a gas / liquid separation tank having at least a refrigerant inlet and an outlet, and a dryer unit provided in the tank. So,
The dryer unit includes a cup-shaped container in which a desiccant is placed, a suction pipe through which a refrigerant passes, and a lid attached to an opening of the cup-shaped container, wherein the cup-shaped container is The suction pipe and the synthetic resin are integrally formed so as to have fitting parts which come into close contact with each other when the lid is attached to the opening of the suction pipe. According to a second aspect of the present invention, the fitting portion between the cup-shaped container and the lid according to the first aspect has a through hole in one of the fitting portions, and the other has a through hole. The projection according to claim 3 is provided on the outer periphery of the cup-shaped container according to claim 1 or 2, when the gas-liquid separation tank is attached to the gas-liquid separation tank.
A flexible fin is provided for contacting the inner peripheral wall of the tank.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described with reference to FIGS. The first shown in FIG.
According to the embodiment, the cup-shaped container 2 in which the desiccant is put and the suction pipe 10 in which the refrigerant is sucked up are integrally formed of a synthetic resin. More specifically, the cup-shaped container 2 has a bottom wall 3 and a peripheral wall 5 and is formed of a synthetic resin integrally with the suction pipe 10 so as to penetrate the center of the bottom wall 3. The peripheral wall 5 of the cup-shaped container 2
It has a tapered portion 5 ′ whose thickness is tapered from the bottom wall 3 toward the opening end 6. Thereby, the mold is easily opened. Further, the opening end 6 has the same thickness, and its inner peripheral surface is a fitting portion 7 which is in close contact with a fitting portion of the lid described later. In the first embodiment, a fitting concave groove 8 is formed on the inner peripheral surface of the fitting portion 7 as shown in FIG. The bottom wall 3 of the cup-shaped container 2 is provided with a large number of through holes 4, 4,... For flowing the refrigerant, as shown in FIG.

[0008] The suction pipe 10 formed integrally with the cup-shaped container 2 also has a wall thickness from the bottom wall 3 of the cup-shaped container 2 toward a position corresponding to the opening end 6 of the cup-shaped container 2. It has a tapered portion 10 'that is tapered. Also, it is tapered from the bottom wall 3 downward in FIG. Thus, for example, the bottom wall 3 of the cup-shaped container 2 is formed on the parting surface of the mold, so that the cup-shaped container 2 and the suction pipe 10 are simultaneously integrally formed, and the mold is easily formed. Can be taken from

As shown in FIG. 2 (b), the lid 14 attached to the open end 6 of the cup-shaped container 2 has a bottom wall having a large number of through holes for refrigerant circulation. 15, a suction pipe insertion opening 16 opened in the center of the bottom wall 15 in a form such as drawing, and a fitting portion 17 rising from the peripheral portion of the bottom wall 15, from aluminum or aluminum. It is formed from a synthetic resin. Further, on the outer peripheral surface of the fitting portion 17, as shown in an enlarged manner in FIG. The fitting projection 18 is used to fit the fitting groove 8 of the cup-shaped container 2 during assembly.
Fit in. From the upper end of the fitting portion 17, a flange 19 is formed radially outward to abut on the opening edge of the cup-shaped container 2 during assembly to act as a stopper.

According to this embodiment, since the cup-shaped container 2 and the suction pipe 10 are integrally formed of a synthetic resin, the dryer unit can be easily assembled. That is, a filter is put in the bottom wall 3 of the cup-shaped container 2, then the desiccant is stored therein, and the filter is again put in such a manner as to hold down the stored desiccant. Is pushed in, the fitting projection 18 of the lid 14 fits into the fitting groove 8 of the cup-shaped container 2,
The lid 14 is attached to the cup-shaped container 2. This allows
The dryer unit is assembled. The suction pipe 10 of the dryer unit assembled in this manner is connected to the refrigerant outlet passage of the header, inserted into a well-known gas / liquid separation tank, and is then connected to the header provided with the refrigerant inlet passage and the like.・ When the opening of the liquid separation tank is closed, a liquid receiver is constructed. By this liquid receiver, water is removed from the supplied refrigerant as is well known in the art.
The liquid is separated into gas and liquid in the liquid separation tank, and only the liquid
Obviously, it is drawn from zero and sent to the evaporator through the refrigerant outlet passage.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those of the first embodiment described above are denoted by the same reference numerals, and the same components are denoted by the same reference numerals with a dash “′”, and will not be described repeatedly. According to the second embodiment, the fitting portion 7 'of the cup-shaped container 2' has a plurality of fitting through holes 8 ', 8' as shown in FIG. , ... are formed. In addition, a flexible fin 9 that is tapered and becomes thinner toward the outside in a radial direction is provided on an outer peripheral portion of a lower end portion of the cup-shaped container 2 ′.

According to the second embodiment, the fitting portion 17 'of the lid 14' is provided with the through hole 8 'of the cup-shaped container 2',
8 ′, a plurality of fitting claws 18 ′, 1
8 ′,... Are formed. These claws 18 ', 1
8 ′,... Are thicker upward. Therefore, when the lid 14 'is pushed into the cup-shaped container 2', the claws 18 ', 18',... Enter the through holes 8 ', 8',. The dryer unit can be assembled from the cup-shaped container 2 ′, the lid 14 ′, and the like according to the present embodiment as described above, and the assembled dryer unit is similarly inserted into the gas-liquid separation tank. And then attach the header,
It is also clear that a receiver is configured.

According to this embodiment, the lid 14 'is provided on the cup-shaped container 2' with claws 18 ', 18',.
8 ', the lid 14' is more securely held by the cup-shaped container 2 '. Further, since the flexible fin 9 is integrally formed in the cup-shaped container 2 ', when the dryer unit is inserted into the gas / liquid separation tank, the tip of the flexible fin 9 is As shown on the left side of (b) of FIG. 3, it is bent while abutting on the inner peripheral surface of the gas / liquid separation tank T. Thereby, the sealing performance between the outer peripheral surface of the cup-shaped container 2 ′ and the inner peripheral surface of the gas-liquid separation tank T is improved, and the position of the cup-shaped container 2 ′ with respect to the gas-liquid separation tank T is shifted. Is prevented. In the embodiment shown in FIG. 3, the through holes 8 ',
8 ′,... Are in the cup-shaped container 2 ′, and claws 18 ′, 1
8 ',... Are provided on the lid 14'. On the contrary, the through holes are provided on the lid 14 ', and the claws are disposed on the cup-shaped container 2'.
It is clear that the same operation can be carried out even if it is provided in the above. It is also apparent that the flexible fins 9 need not necessarily be provided at the lower end of the cup-shaped container 2 ', and that substantially the same effects can be obtained even if they are provided near the intermediate portion of the cup-shaped container 2'. .

[0014]

As described above, according to the present invention, the dryer unit constituting the liquid receiver includes a cup-shaped container in which a desiccant is placed, a suction pipe through which a refrigerant passes, and an opening of the cup-shaped container. The cup-shaped container is integrally formed by a suction pipe and a synthetic resin so that the cup-shaped container has a fitting portion that is in close contact with each other when the lid is attached to the opening of the cup-shaped container. The number of parts is smaller than that of the conventional dryer unit, and there is no need for bending of the seal filter, crimping of the suction pipe, deformation, etc. as in the past when assembling. By simply attaching the lid to the cup-shaped container, a dryer unit is configured. Therefore, according to the present invention, an advantage peculiar to the present invention that a liquid receiver can be obtained at low cost can be obtained. According to another aspect of the present invention, the fitting portion between the cup-shaped container and the lid is provided with a through-hole in one of the fitting portions, and a projection fitted in the through-hole in the other fitting portion. The effect that the lid is more reliably held in the cup-shaped container is added,
Furthermore, according to the invention in which a flexible fin that comes into contact with the inner peripheral wall of the gas-liquid separation tank is provided on the outer periphery of the cup-shaped container when the tank is mounted on the gas-liquid separation tank, in addition to the above effects, The sealing effect between the gas / liquid separation tank is improved, and the effect that the dryer unit is reliably positioned at a predetermined position is obtained.

[Brief description of the drawings]

FIG. 1 is a view showing a cup-shaped container and a suction pipe, which are constituent elements of a dryer unit according to a first embodiment of the present invention, wherein (a) is an overall sectional view and (b) is (A) is an enlarged cross-sectional view of a portion indicated by an arrow B, and (C) is a bottom view.

FIGS. 2A and 2B are views showing a lid which is a component of the dryer unit according to the first embodiment of the present invention, wherein FIG. 2A is a front sectional view thereof, and FIG. It is an expanded sectional view of the part shown by.

FIG. 3 is a view showing a part of components of a dryer unit according to a second embodiment of the present invention, in which (A) shows a cup-shaped container and a suction pipe, and (B) shows a lid. FIG.

FIG. 4 is a view showing a conventional dryer unit, in which (A) is a front view before assembling showing a partial cross section, and (B) is a front view after assembling showing a partial cross section. .

[Explanation of symbols]

 2, 2 'cup-shaped container 7, 17' fitting part 8 fitting concave groove 8 'through hole 10 suction pipe 14, 14' lid 18 fitting convex part 18 'nail

Claims (3)

[Claims] 1. A liquid receiver comprising: a gas / liquid separation tank having at least an inlet and an outlet for a refrigerant; and a dryer unit provided in the tank. A cup-shaped container in which an agent is placed, a suction pipe through which a refrigerant passes, and a lid attached to an opening of the cup-shaped container, wherein the cup-shaped container has the lid at an opening of the cup-shaped container. A liquid receiver, which is integrally formed of the suction tube and a synthetic resin so as to have fitting portions that come into close contact with each other when the body is mounted. 2. A fitting portion between the cup-shaped container and the lid according to claim 1, wherein one of the fitting portions has a through hole, and the other fitting portion has a through hole. A liquid receiver provided with a projection. 3. An outer peripheral portion of the cup-shaped container according to claim 1 or 2 is provided with a flexible fin which is in contact with an inner peripheral wall of the gas / liquid separation tank when the tank is mounted on the tank. , Receiver.