JP2000320931A - Liquid receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost by reducing both of the processing cost and the number of processes of assembling. SOLUTION: A liquid receiver is adapted to include a liquid receiver body 11 formed into a cylinder, and a cock structure 20 inserted from a lower opening portion 111 (one opening portion) of the liquid receiver body 11 for closing the opening portion by directing a base end surface 27 toward the opening portion 111. The liquid receiver provided with two through-holes 11a in the liquid receiver body 11, 11b disposed on the same line at a position corresponding to the base end surface 27 of the cock structure 20, over which through-holes falling stop member 42 is provided, which is trained to pass through the through- holes 11a, 11b for stopping falling of the cock structure 20. Hereby, both of the processing cost and the number of processes of assembling can be reduced as well as the manufacturing cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver incorporated in an air conditioner installed in, for example, an automobile or a house, for performing gas-liquid separation of a heat medium liquefied by a condenser. is there.

[0002]

2. Description of the Related Art Generally, an air-conditioning system used for an air conditioner of a car, a house or the like includes a compressor a, a condenser b, a liquid receiver c, an expansion valve d, and an evaporator e as shown in FIG. And those connected via a pipe f are known. In the air-conditioning system AC configured as described above, the high-temperature and high-pressure gaseous heat medium discharged from the compressor a performs heat exchange with the heat exchange fluid, for example, air while passing through the condenser b. By releasing latent heat, it begins to condense and liquefy. The high-temperature heat medium mixed with gas and liquid in this manner is separated into gas and liquid while being temporarily stored in the liquid receiver c, and only the liquid is sent to the expansion valve d and injected from a small hole (not shown) by the expansion valve d. As a result, it is adiabatically expanded to form a low-temperature and low-pressure mist and sent to the evaporator e.

In the evaporator e, the heat medium evaporates and evaporates by performing heat exchange with a heat exchange fluid such as air to absorb latent heat. The low-temperature and low-pressure heat medium thus vaporized is sent to the compressor a and adiabatically compressed,
It becomes a high-temperature and high-pressure gaseous heat medium and is sent to the condenser b again. By repeating such a series of cycles, the air conditioning system AC can be used for cooling and heating.

In the air conditioning system AC, the liquid receiver c
Separates the heat medium in a state in which the liquid and the gas sent from the condenser b are mixed into gas and liquid, and temporarily stores the liquid therein.
Further, it plays a role of removing impurities and the like contained in the heat medium in the course of one cycle.

[0005] That is, as shown in FIG.
It is configured by closing upper and lower openings of a liquid receiver main body g formed in a cylindrical shape. However, the drawing does not show the entirety of the liquid receiver c, but shows only a main part of the lower part of the liquid receiver c which closes the lower opening with the plug h. The liquid receiver main body g is provided with a heat medium inlet (not shown) at a position above the peripheral wall g1 and a heat medium outlet g2 at a lower position. .

On the other hand, the plug h is formed in a columnar shape, and has an O-ring groove h1 formed on the outer peripheral surface thereof.
A ring (seal means) i is provided. O-ring i
Is in close contact with the inner surface of the receiver body g to prevent the heat medium from leaking out from between the plug h and the receiver body g. Further, a filter j is detachably attached to a tip end surface h2 of the plug h by a screw j3.
The filter j is formed in a cylindrical shape with a bottom, and is configured to remove impurities in the heat medium by a filtration membrane j1 provided on a peripheral surface. That is, the above-mentioned outlet g2 is disposed beside the filtration membrane j1, and the filter j
The heat medium flowing into the inside from the tip side flows through the filtration membrane j1 to the outlet g2.

[0007] The outer peripheral surface of the filter j and the receiver g
There is a predetermined gap between the inner peripheral surface of the receiver j and the outer periphery of the distal end of the filter j.
2 are provided.

The plug h has an external thread h3 formed on the outer periphery on the distal end side thereof.
A female screw g3 to be screwed with the male screw h3 is formed.
Further, the stopper h has a hexagonal wrench hole h at its base end surface.
4 are formed. That is, the plug h is inserted into the wrench hole h4 by turning a hexagon wrench (not shown),
It is detachable from the receiver body g.

When closing the lower opening of the receiver main body g with the above-described plug h, a filter j is attached to the tip end surface h2 of the plug h with a screw j3, and then the filter j and the plug are inserted. The body h is inserted into the receiver body g, and the stopper h is turned with a hexagon wrench in a direction to tighten the screw. Then, the plug h
The male screw h3 of the liquid crystal device bites into the female screw g3 of the liquid receiver main body g, and the plug h is fixed to the liquid receiver main body g.
At this time, since the O-ring i is in close contact with the inner peripheral surface of the receiver main body g, it is possible to prevent the heat medium from leaking from between the receiver main body g and the plug h.

[0010]

However, in the conventional liquid receiver c, the female screw g3 must be processed in the liquid receiver main body g, and the male screw h3 must be processed in the stopper h, so that the processing cost increases. There is a problem. Moreover, the plug h
, The male screw h3 must be screwed into the female screw g3 and tightened with a predetermined torque, so that there is a problem that the number of assembly steps is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid receiver which can reduce both the processing cost and the number of man-hours, thereby reducing the manufacturing cost. And

[0012]

According to a first aspect of the present invention, there is provided a liquid receiving device having a cylindrical shape, and a liquid receiving device inserted through at least one opening of the liquid receiving device main body. And a plug that closes the opening with the base end face facing the opening side, wherein the receiver main body is located on the same line at a position corresponding to the base end face of the plug. It is characterized in that two arranged through-holes are provided, and these through-holes are provided with retaining means for hanging over the through-holes to prevent the plug from coming off.

[0013] In the above structure, after the plug is inserted into the receiver main body, the stopper is inserted into one and the other through holes located on the same straight line.
The retaining means can be extended over the two through holes. Thereby, it is possible to prevent the stopper from coming off the liquid receiver main body. Therefore, the stopper can be easily fixed to the receiver main body, so that the number of assembling steps can be reduced. In addition, since it is not necessary to machine a male screw or a female screw on the outer periphery of the plug or the inner periphery of the receiver main body, it is possible to reduce the processing cost. As a result, manufacturing costs can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the retaining means extends from one through hole to the other through hole, and is provided at one end of the retaining means. Is provided with a locking projection that locks to the peripheral edge of the one through-hole, and at the other end of the retaining means, after passing through the other through-hole, moves to the peripheral edge of the through-hole. It is characterized in that a movable locking projection is provided for locking the peripheral edge.

With this configuration, after the movable locking projection is locked to the peripheral edge of the other through-hole, the retaining means does not fall out to the one through-hole side. Further, since the locking projection is locked to the peripheral portion of one through hole, the retaining means does not fall off to the other through hole side. Therefore, after the movable locking projection moves so as to lock to the peripheral edge of the other through hole, it is possible to reliably prevent the retaining means from falling off from the receiver main body.

Further, by applying an external force to the movable locking projection, the movable locking projection can be moved so as not to be locked to the peripheral edge of the other through hole. Can be easily removed. Therefore, the stopper can be easily attached to and detached from the receiver main body.
The maintainability can be improved.

According to a third aspect of the present invention, in the first aspect of the present invention, the retaining means extends from one through hole to the other through hole and is fixed to the plug with a set screw. It is characterized by becoming.

In the above-described structure, after the stopper is inserted into the through hole, the stopper is fixed to the stopper with a set screw, so that the stopper and the stopper are securely held in the receiver body. can do.

In addition, a very inexpensive set screw mass-produced as a standard product can be used. In addition,
The stopper has a screw hole into which a set screw is screwed. However, the screw hole can be formed easily because the screw hole has a small diameter so that the screw can be screwed. Further, the retaining means may have a simple structure, for example, a flat plate, which can be inserted into the two through holes. Therefore, the cost can be reduced as compared with a conventional one in which a large-diameter male screw or a female screw is machined on the outer periphery of the stopper or the inner periphery of the liquid receiver main body.

Moreover, since the diameter of the set screw is small, the set screw can be easily tightened with a small torque. Further, in the conventional one, since a large-diameter male screw or female screw is formed on the outer periphery of the stopper or the inner periphery of the receiver main body, if the stopper is slightly inclined, the threads are engaged in a shifted state. In other words, there is a high risk of crushing the screw thread. For this reason, assembly was troublesome. However, in the case of a set screw,
Since the diameter of the screw is small, even if it is slightly inclined, the screw thread does not shift, and the assembly is easy. Therefore, the number of assembling steps can be reduced.

If the thread is crushed,
In the conventional one, not only the stopper but also all the components on the receiver main body side must be replaced. However, in the case of a set screw, it is only necessary to replace the set screw and the plug, and damage when the screw thread is crushed can be minimized.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid receiver according to the present invention will be described below in detail with reference to the drawings. In addition, the same reference numerals are given to elements common to the constituent elements shown in the conventional example,
The description will be simplified.

First Embodiment First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 7, a liquid receiver 10 shown in the first embodiment includes a liquid receiver main body 11 formed in a cylindrical shape and a lower opening (one of the liquid receiver main body 11). The plug 20 is inserted through the opening (opening) 111 and closes the lower opening 111, and is attached to the distal end surface 26 of the plug 20 located inside the liquid receiver main body 11, and 30 for trapping impurities in the heat medium supplied to the filter
And In the receiver main body 11, two coaxially arranged two-pieces are provided at positions corresponding to the base end surfaces 27 of the plugs 20.
Two through holes 11a and 11b are provided. Also, these through holes 11a, 11b are provided in the through holes 11a, 11b.
The stopper means 42 is provided so as to be hung so as to pass through b and to prevent the stopper 20 from coming off.

The retaining means 42 extends from one through hole 11a to the other through hole 11b. One end of the retaining means 42 is provided with one through hole 11.
A locking projection 42a is provided for locking to the peripheral edge of “a”. The other end of the retaining means 42 is provided with a movable locking projection 42b which, after passing through the other through-hole 11b, moves to the peripheral edge of the through-hole 11b and locks on the same peripheral edge. I have.

Hereinafter, the above configuration will be described in more detail. That is, as shown in FIGS. 10 to 12, the liquid receiver 10 is in a state of being attached to the condenser b.

As shown in FIG. 10, the condenser b includes a pair of header pipes 2a and 2b, a plurality of heat exchange tubes 3 bridged between the header pipes 2a and 2b, It is mainly composed of heat exchange fins such as corrugated fins 4 which are interposed therebetween and are integrally joined.

The header pipes 2a and 2b are formed in a substantially cylindrical shape by, for example, an extruded member made of aluminum.
A cap member 5 is fixedly attached to the upper and lower ends. Further, for example, near the upper end on the outer side of one header pipe 2a (left side in FIG. 10), a heat medium inlet 7 is provided, and the lower end on the outer side of the other header pipe 2b (right side in FIG. 10). Near the outlet 8 of the heat medium
Is provided. Further, as shown in FIG. 1 and FIG. 11, an outlet 9a and an inlet 9b of the heat medium are formed in the side surface of the header pipe 2a so as to communicate with the liquid receiver 10. The liquid receiver 10 is integrally brazed to the header pipe 2a so as to communicate with the outflow hole 9a and the inflow hole 9b. The header pipe 2a
Is provided with a partition plate 9c that separates the outflow hole 9a side from the inflow hole 9b side.

As shown in FIGS. 10 and 12, the heat exchange tube 3 is formed of, for example, an extruded member made of aluminum, for example, in a flat plate shape. A plurality of flow paths (not shown) for the heat medium are formed to penetrate. Both ends of the heat exchange tube 3 formed in this way are inserted and fixed to a plurality of slits (not shown) arranged parallel to each other at appropriate intervals on opposite sides of the side surfaces of the header pipes 2a and 2b. Have been.

Heat exchange fins or corrugated fins 4
As shown in FIG. 10, is formed in a continuous wave shape by bending a plate made of, for example, aluminum, and is interposed between the heat exchange tubes 3 and brazed. In this case, the corrugated fins 4 are also brazed to the outer sides of the heat exchange tubes 3 arranged at the uppermost stage and the lowermost stage, and both corrugated fins 4 are protected to protect these corrugated fins 4. Further, a side plate 6 is brazed to the outer side.

As shown in FIGS. 1 and 12, a liquid receiver main body 11, which is a component of the liquid receiver 10, is formed of, for example, an extruded aluminum material and has a cylindrical shape. Header pipe 2a
The joining parts 16 and 17 for brazing are integrally formed. As shown in FIG. 1, the lower joint 17 has an inlet 12 formed at a position corresponding to the outlet 9a of the header pipe 2a and an inlet 9b.
The outlet 13 is formed at a position corresponding to.

The outflow hole 9a and the inflow port 12 are located between the upper side of the partition plate 9c in the header pipe 2a and the receiver main body 11a.
It communicates with the inlet side of the filter 30 in the inside. On the other hand, the inflow hole 9b and the outflow port 13 communicate between the lower side of the partition plate 9c in the header pipe 2a and the outlet side of the filter 30 in the receiver main body 11.

The upper opening 111 of the liquid receiver main body 11 is also provided.
a is closed by the cap member 15. The cap member 15 is formed of aluminum, and is fixed to the receiver main body 11 by, for example, brazing. And the inner peripheral surface of the liquid receiver main body 11
Reference inner peripheral surface 112 and enlarged inner peripheral surface 113 having a circular cross section
Is formed by The reference inner peripheral surface 112a is a first reference inner peripheral surface 112a corresponding to a portion for storing the desiccant 44.
And a second reference inner peripheral surface 1 corresponding to a portion for accommodating the filter 30 and having a slightly larger diameter than the first reference inner peripheral surface 112a.
12b. As shown in FIG. 1 and FIG. 7, the boundary between the first reference inner peripheral surface 112a and the second reference inner peripheral surface 112b is a step 112c.

[0033] As shown in FIG.
The diameter of the portion originally serving as the second reference inner peripheral surface 112b is increased by plastic working such as spinning, and is formed by a parallel inner peripheral surface 113a and a tapered inner peripheral surface 113b. The second reference inner peripheral surface 112b and the tapered inner peripheral surface 113b, and the tapered inner peripheral surface 113b and the parallel inner peripheral surface 11
3a is formed continuously through a smooth curved surface.

The plug 20 is, as shown in FIGS.
It is formed in a circular cross section by a metal such as aluminum, and has a reference diameter portion 21 at a distal end fitted to the second reference inner peripheral surface 112b. The portion is an enlarged diameter portion 22. An O-ring groove 23 for attaching an O-ring 41 is formed in the reference diameter portion 21. The enlarged diameter portion 22 is formed so as to fit on the parallel inner peripheral surface 113a, and has a length in the axial direction slightly shorter than that of the parallel inner peripheral surface 113a.

As shown in FIG. 6B, the O-ring 41 bulges in an arc shape from the outer peripheral surface of the reference diameter portion 21 when it is attached to the O-ring groove 23. However, the diameter of the parallel inner peripheral surface 113a is equal to or larger than the outer diameter of the O-ring 41. Therefore, when the plug 20 is inserted into the receiver main body 11, the O-ring 41 does not undergo compression deformation from the parallel inner peripheral surface 113a. However, as shown in FIG. 1, when the O-ring 41 is inserted into the second reference inner peripheral surface 112 b, the O-ring 41 is compressed and deformed to almost the outer diameter of the reference diameter portion 21, and
It comes into close contact with the reference inner peripheral surface 112b.

As shown in FIGS. 1 to 3, through holes 11a and 11b are formed at the position of the parallel inner peripheral surface 113a of the liquid receiver main body 11. Through holes 11a, 11
As shown in FIGS. 2 and 3, b has a rectangular cross section that is long in the circumferential direction, and is formed coaxial with a straight line perpendicular to the central axis of the liquid receiver main body 11. Also, the through hole 1
1a and 11b are seal portions 31 of a filter 30 described later.
4 is in contact with the step 112c, the through-hole 11
The stopper means 42 inserted into the plugs 20a and 11b is located at a position where it comes into contact with the base end surface 27 of the plug 20.

As shown in FIGS. 1 to 4, the retaining means 42 has a plate-like portion 42c having a sectional shape just fitted into the through holes 11a and 11b, and one end of the plate-like portion 42c. Is formed with a locking projection 42a, and the other end is formed with a movable locking projection 42b. The locking protrusion 42a and the movable locking protrusion 42b are formed so as to protrude on both sides in the width direction of the plate-like portion 42c.

The retaining means 42 is formed with a groove 42d of a predetermined length extending from the other end to one end along the center line of the plate-like portion 42c. The groove 42d forms two forks 42e that extend in parallel toward the other end and are elastically deformable in directions away from each other.

Further, the retaining means 42 is formed with a tapered portion 42f which is inclined so as to approach the groove 42d from the tip of each of the movable locking projections 42b located on the left and right toward the other end. The dimension between the left and right tapered portions 42f is formed smaller at the other end than the dimension in the width direction of the through holes 11a and 11b. The retaining means 42 is made of a metal such as aluminum or steel, which can be sufficiently elastically deformed, or a synthetic resin.

As shown in FIGS. 1, 2, and 6, the plug 20 has a cylindrical portion 20a from the base end surface 27 to a predetermined position on the distal end side, and the distal end side of the cylindrical portion 20a. The portion is a cylindrical portion 20b. The above-mentioned O-ring groove 23 is formed in the cylindrical portion 20b. In addition, cylindrical part 2
In 0a, a projection 20c is provided which protrudes from the axial center position of the cylindrical portion 20b to the base end side. This projection 20c
It is formed at a height such that it does not protrude from the base end surface 27.

The plug 20 has a concave portion 26a having a predetermined depth extending in the axial direction at an axial position of the distal end surface 26 thereof. The recess 26a has a circular cross section.

As shown in FIGS. 1 and 5, the filter 30 has a cylindrical peripheral wall 311 and a cylindrical peripheral wall 311.
11 has a bottom wall portion 312 for closing one open end, and the bottom wall portion 312 is attached such that the bottom surface 33 of the bottom wall portion 312 comes into contact with the distal end surface 26 of the plug 20. The bottom surface 33 of 312 is provided with a convex portion 33a that fits into the concave portion 26a.

That is, the filter 30 comprises a filter body 31 integrally formed of, for example, nylon as a synthetic resin, and a filter membrane 3 similarly formed of nylon in a mesh.
2 is provided. The filter body 31 has a peripheral wall 311 formed in a cylindrical shape, and a bottom wall 312 is formed below the peripheral wall 311. The upper side of the peripheral wall portion 311 is opened as it is, and a cylindrical seal portion 314 is formed around the opening end on the upper side via a flange portion 313.

As shown in FIG. 5, a window 311a is formed on the peripheral wall 311 at a position equally divided into four in the circumferential direction.
Each window 311a is formed in a square shape in side view,
A column 311b in the peripheral wall portion 311 is between the windows 311a.
It has become.

The bottom wall 312 is formed with a projection 33 a at an axial position of the bottom surface 33. This projection 33a is
The cross section is formed in a circular shape, and fits into the concave portion 26a. The fitting accuracy between the convex portion 33a and the concave portion 26a is a fitting tolerance of a loose fit that can be easily fitted.

The flange 313 is formed thin and is connected to a substantially central position of the seal 314 in the axial direction. The seal portion 314 is formed so that its outer diameter forms an interference fit with the second reference inner peripheral surface 112b.
It is formed slightly larger than the diameter of the reference inner peripheral surface 112b. That is, the seal portion 314 is formed on the second reference inner peripheral surface 112.
Under the compression force from b, it is elastically slightly deformed together with the flange portion 313, and comes into close contact with the second reference inner peripheral surface 112b. The distal end edge of the seal portion 314 comes into contact with the step portion 112c in a predetermined pressurized state when the stopper 20 is fixed to the receiver main body 11 by the retaining means 42. Thereby, the filter 30
Are not separated from the plug 20.

The filter membrane 32 is formed in a mesh shape with, for example, a nylon thread, and is integrally fixed to the filter body 31 when the filter body 31 is formed. However, the filtration membrane 32 is formed by forming a plurality of holes in the filter main body 31 in a mesh shape, thereby forming the filter main body 31.
May be completely integrated.

As shown in FIG. 8, the desiccant 44 located on the first reference inner peripheral surface 112a forms a square cloth 44a with polyester fibers and then forms a bag 44b from the cloth 44a. The bag 44b is filled with a moisture absorbing means (not shown) such as silica gel to form an elliptic rod. The bag 44b is a cloth 44 shown in FIG.
A connection margin 44c of a predetermined width is provided at the peripheral edge of the line a, and the connection margin 44c is formed by connecting the connection margin 44c in a state of being bent at the center line L1. However, the bag 44b is left open at one end in the longitudinal direction, and after filling with moisture absorbing means from this opening, the connection margin 44 of the opening is used.
By connecting c, the moisture absorbing means is confined. The connection margin 44c is connected by heat welding. In addition, the inner line L of the connection allowance 44c
The connection margin 44c may be connected by sewing with a sewing machine, hand sewing, or the like along 2.

As shown in FIG. 8C, the connection margin 44c is formed with an arc-shaped notch 44e at each corner 44d. The notch 44e is formed after connecting the connection margin 44c. However, at the point of the cloth 44a shown in FIG. 8A, a portion corresponding to the corner 44d may be cut out in an arc shape.

In this case, the width of the connection margin 44c is about 5
mm, and the radius of the notch 44e is about 3 on the side of the center line L1.
mm, the side distant from the center line L1 is about 5 mm. The dimensions of the elliptical column containing the moisture absorbing means are about 200 mm in length, about 30 mm in major axis, and about 15 m in minor axis.
m.

As described above, by providing the notch 44e at the corner 44d of the connection margin 44c, when the filter 30 is inserted into the receiver main body 11, for example, the connection margin 44c is connected to the filter 30 and the second reference inner circumference. It is possible to prevent pinching with the surface 112b. That is, when the corner 44d is sharp at a right angle, as shown in FIG. 9, when the tip of the sharp portion inserts the filter 30 into the receiver body 11,
It is easy to enter between the filter 30 and the second reference inner peripheral surface 112b, and there is a risk of forming a flow path that bypasses the filter 30. However, by providing the notch 44e in the corner 44d, there is no sharp part, so the connection margin 44c
Can be prevented from being caught between the filter 30 and the second reference inner peripheral surface 112b.

To assemble the liquid receiver 10 configured as described above, first, the desiccant 44 is inserted into the liquid receiver main body 11, and then the plug 20 having the filter 30 is received from the filter 30 side. It is inserted into the liquid container body 11. At this time, since the diameter of the parallel inner peripheral surface 113a is formed larger than the diameter of the second reference inner peripheral surface 112b, the seal portion 314 of the filter 30 is caught by the lower opening 111 and the through holes 11a and 11b. Without entering, it smoothly enters the parallel inner peripheral surface 113a. Further, the seal portion 314 is formed on the tapered inner peripheral surface 113.
b and smoothly enters the second reference inner peripheral surface 112b while being compressed and deformed.
At a predetermined pressure.

On the other hand, although the O-ring 41 has a large swelling amount from the reference diameter portion 21, the diameter of the parallel inner peripheral surface 113 a is O
Since the diameter of the ring 41 is small enough not to deform the ring 41 by compression, the lower opening 111 and the through holes 11a, 11a
b, it smoothly enters the parallel inner peripheral surface 113a. Further, the O-ring 41 is provided on the tapered inner peripheral surface 11.
3b and smoothly enters the second reference inner peripheral surface 112b while being compressed and deformed.
b is brought into close contact with a predetermined pressure.

Then, the seal portion 314 of the filter 30 contacts the step portion 112c, and the flange portion 313 and the like are elastically deformed by a predetermined amount. By this deformation, the step portion 112c is removed from the filter 30.
At this point, the base end surface 27 of the plug 20 and the inner side surface of the through holes 11a and 11b are substantially in a state of being in contact with each other.

Then, the retaining means 42 is inserted into the through holes 11a and 11b from the other end. At this time, each tapered portion 42f is connected to one through hole 11a or the other through hole 11b.
, Each fork portion 42e is elastically deformed so as to be close to each other, and each movable locking convex portion 42b passes through the through holes 11a and 11b. When the movable locking projection 42b passes through the other through-hole 11b, each fork 42e elastically returns to the original parallel body. For this reason, each movable locking projection 42b moves to the peripheral edge of the other through hole 11b and locks on the same peripheral edge.

After the movable locking projection 42b is locked to the peripheral edge of the other through hole 11b in this way, the retaining means 4
2 does not drop off to one of the through holes 11a. Further, since the locking projection 42a is locked to the peripheral portion of one through hole 11a, the retaining means 42 is connected to the other through hole 11b.
It does not fall to the side. That is, the retaining means 42 is held in the portions of the through holes 11a and 11b.

Further, the plug body 20 is in a state where the base end surface 27 is in contact with the retaining means 42. Thereby, the plug 20
Is determined, and the seal portion 314 of the filter 30 continues to be kept pressed against the step portion 112c with a predetermined pressure.

On the other hand, replacement of the desiccant 44 and the filter 30 is carried out by removing the stopper 42 from the through holes 11a and 11b and then pulling out the plug 20 from the receiver main body 11. The retaining means 42 makes each movable locking projection 4b close to each other by moving each movable locking projection 42b.
2b is moved to a position where it does not engage with the peripheral edge of one through hole 11a or the other through hole 11b.
It can be easily taken out from 1a and 11b. Also,
The plug 20 can be easily removed from the receiver main body 11 by pulling out the plug 20c by grasping the projection 20c with a gripping means such as pliers. Then, the filter 30 can be easily attached to and detached from the plug 20 by inserting the convex portion 33a into the concave portion 26a of the plug 20 or pulling out the filter 33. In addition, also about the filter 30, the convex part 3
By gripping and pulling out 3a with the gripping means, it can be easily removed from the liquid receiver main body 11.

A heat medium flows into the liquid receiver 10 assembled as described above from the outlet hole 9a of the header pipe 2a in the condenser b through the inflow port 12, and the heat medium flows into the desiccant. 44 and the filter 30. Thereby, impurities and water contained in the heat medium can be removed. Of the heat medium thus purified, the liquefied portion passes through the inflow hole 9b of the header pipe 2a from the outflow port 13, flows into the header pipe 2a, and is cooled again by the condenser b. That is, the gaseous portion remains at the upper part in the receiver main body 11.

According to the liquid receiver 10 configured as described above, the stopper 20 is inserted into the through holes 11a and 11b after the plug 20 is inserted into the liquid receiver main body 11 from the lower opening 111. Thereby, the stopper 20 can be easily fixed to the receiver main body 11 with one touch. Therefore, the number of assembling steps can be reduced. Moreover, since there is no need to machine the external thread or the internal thread on the plug or the receiver main body as shown in the conventional example, the processing cost can be reduced. Therefore, the manufacturing cost can be reduced.

After the movable locking projection 42b is locked to the peripheral edge of the other through hole 11b, it is possible to reliably prevent the retaining means 42 from falling off from the receiver main body 11. Moreover, by applying an external force to the movable locking projection 42b, the retaining means 42 can be easily removed from the through holes 11a, 11b. Therefore, since the plug 20 can be easily removed from the receiver main body 11, maintenance can be improved.

The O-ring 41 is connected to the lower opening 111.
Without being caught in the through holes 11a, 11b, etc.
It can be inserted up to the reference inner peripheral surface 112b. Also,
The seal portion 314 of the filter 30 can also be inserted into the second reference inner peripheral surface 112b without being hooked on the lower opening 111, the through holes 11a, 11b, and the like. Therefore, the plug 20 is not damaged without damaging the O-ring 41 and the filter 30.
Can be easily inserted into the liquid receiver main body 11, and the O-ring 41 can be sufficiently compressed and deformed.
It is possible to reliably prevent the heat medium from leaking out from between the plug 1 and the plug 20. Moreover, since the enlarged inner peripheral surface 113 and the second reference inner peripheral surface 112b are connected smoothly and continuously, the O-ring 41 is not damaged at all when the O-ring 41 undergoes compression deformation in the receiver main body 11. .

Further, the filter 30 has a sealing portion 31
4 is brought into close contact with the reference inner peripheral surface 112 with a predetermined pressure, and the range of contact is longer in the axial direction.
It is possible to reliably prevent the heat medium from bypassing the outside of the seal portion 314. Therefore, the filter 30
Can be improved in filtration performance.

Further, the filter 30 can be easily attached to the plug 20 simply by fitting the convex portion 33a and the concave portion 26a, so that the filter is fixed to the plug with screws as in the conventional case. And mounting the filter 30,
Removal becomes extremely easy. Therefore, the filter 30
It is possible to reduce the number of man-hours for attaching the plug 20 to the plug 20. In addition, since screws are not required, the number of parts can be reduced, and the number of processing steps such as drilling a screw hole can be reduced. As a result, when mass production is performed, a particularly large cost reduction can be achieved.

Further, since the axis of the plug 20 and the axis of the filter 30 can be easily matched by the fitting of the projection 33a and the recess 26a, the axis of the filter 30 is eventually received by the liquid receiving liquid. It can be easily matched with the axis of the container body 11. That is, in the conventional case where the filter is fixed to the plug with a screw, it was difficult to match the axis of the filter with the axis of the plug, but in the present embodiment, the alignment of this axis is extremely simple. become. Therefore, also from this point, the number of assembling steps can be reduced.

Further, in a state where the stopper 20 is fixed to the receiver main body 11 by the retaining means 42, the tip of the seal portion 314 of the filter 30 is locked to the step portion 112c with a predetermined pressure. Therefore, the filter 30 is
Can be reliably prevented from leaving. Moreover,
The contact between the tip of the seal portion 314 and the step portion 112c increases the area sealed by the seal portion 314, so that the heat medium can be more reliably prevented from bypassing the outside of the filter 30.

Further, the connection margin 44 in the desiccant 44
Since the notch 44e is formed in the corner portion 44d of c, it is possible to prevent the connection margin 44c from being caught between the filter 30 and the second reference inner peripheral surface 112b. Therefore, it is possible to reliably prevent a flow path that bypasses the filter 30 from being formed due to the connection margin 44c being sandwiched.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. However, the same reference numerals are given to the same components as the components shown in the first embodiment, and the description will be simplified. The main difference between the second embodiment and the first embodiment is that the stopper 43 is fixed to the plug 2 by the set screw 43n.
It is fixed at 0.

That is, as shown in FIGS. 13 to 16, the retaining means 43 is formed in a plate shape having a cross-sectional shape which just fits into the through holes 11a and 11b.
A hole 43a for passing a 3n screw portion is formed. Also,
The retaining means 43 is formed in an arc shape such that one end 43b and the other end 43c in the longitudinal direction thereof coincide with the outer peripheral surface of the receiver main body 11 in a state of being inserted into the through holes 11a and 11b. Have been. And the retaining means 43,
It is formed of a metal such as aluminum or steel or a synthetic resin.

On the other hand, as shown in FIG. 17, the projection 20c of the plug 20 is formed in a columnar shape at the position of the axis of the columnar portion 20b. The top surface of the projection 20c is formed flush with the base end surface 27. Further, the projection 20c is formed with a screw hole 20d at the axial center position of the top surface, into which the screw portion of the set screw 43n is screwed.

In the liquid receiver 10 configured as described above, after the stopper 20 is inserted into the liquid receiver main body 11,
3 is inserted into the through holes 11a and 11b, and the retaining means 43 is fixed to the plug 20 with the set screw 43n. As a result, the plug 20 and the retaining means 43 are connected to each other, and the retaining means 43 is held in a state fitted in the through holes 11a and 11b. Therefore, the retaining means 43 and the plug 20 can be securely held by the receiver main body 11.

Also, as the set screw 43n, an extremely inexpensive mass-produced standard screw can be used. The stopper 20 has a screw hole 20d into which the set screw 43n is screwed. Since the screw hole 20d has a small diameter so that the set screw 43n can be screwed, it is easily formed. can do. Furthermore, retaining means 4
3 has only to be able to be inserted into the two through holes 11a and 11b, and therefore has an advantage that a very simple plate-shaped structure is sufficient. Therefore, the cost can be reduced as compared with the conventional one in which a large-diameter male screw or a female screw is machined on the outer periphery of the plug 20 or the inner periphery of the liquid receiver main body 11. Further, since the retaining means 43 also serves as a washer, the number of constituent members can be reduced and the cost can be reduced in this respect as well.

Further, since the diameter of the set screw 43n is small, the set screw 43n can be easily tightened with a small torque. Further, in the conventional one, since a large-diameter male screw or female screw is formed on the outer periphery of the stopper 20 or the inner periphery of the receiver main body 11, even if the stopper 20 is slightly inclined, the thread is shifted. And there is a high risk of crushing the threads. For this reason, assembly was troublesome. However, when the set screw 43n is used, since the diameter of the screw is small,
Even if it is slightly tilted, the threads do not shift, and assembly is easy. Therefore, the number of assembling steps can be reduced.

If the thread is crushed,
In the conventional one, not only the plug 20 but also the condenser b on the receiver main body 11 side must be completely replaced. However, when the set screw 43n is used, the set screw 43n and the plug 2
It is only necessary to replace 0, and it is possible to minimize the damage when the screw thread is crushed.

Although the filter 30 is attached to the plug 20 by the projection 33a and the recess 26a, the filter 30 is attached to the plug 20 by the screw j3 as shown in the conventional example of FIG. It may be configured as follows. In this case, the reference inner peripheral surface 112
May be simply constituted by the diameter of the second reference inner peripheral surface 112b. That is, the movement of the filter 30 can be prevented without providing the step portion 112c. In this case, the through holes 11a and 11b are positioned at positions corresponding to the base end surface 27 of the plug 20 when the distal end of the enlarged diameter portion 22 of the plug 20 hits a predetermined position on the tapered inner peripheral surface 113b. It is preferable to provide at the position of the parallel inner peripheral surface 113a of the liquid receiver main body 11 so that That is, it is preferable that the stopper 20 be configured to be held by the tapered inner peripheral surface 113b and the retaining means 42. However, when the retaining means 43 is used, the plug 20 can be used without using the tapered inner peripheral surface 113b.
Can be held at a predetermined position in the liquid receiver main body 11.

Although the projections 33a and the recesses 26a are designed to be fitted with a loose fit, these projections 33a
And the concave portion 26a may be configured to be fitted with an interference fit. When this interference fit is adopted, the protrusion 33
The filter 30 can be fixed to the plug 20 by the frictional force between the a and the recess 26a. However, when the interference fit is adopted, the tip of the convex portion 33a and the concave portion 26a
It is preferable that a tapered or curved chamfer is provided at one or both of the entrance portions of the projections 33a so that the projections 33a can easily enter the recesses 26a.

The filter 30 is formed with the projection 33a and the plug 20 is formed with the recess 26a. However, the filter 30 is formed with a recess and the plug 20 is formed with a projection. May be. In addition, the convex portion 33a and the concave portion 26a may be formed in an irregular cross-sectional shape different from a circular shape. That is, as the convex portion 33a and the concave portion 26a,
For example, it may be formed with a cross-sectional shape such that one or more protrusions protrude from the circumference of a circle, may be formed with a polygonal cross-sectional shape such as a triangle, a quadrangle, or a hexagon, or may be formed as an ellipse. May be formed with a modified cross-sectional shape.

As described above, when the convex portion 33a and the concave portion 26a are formed to have irregular cross sections, the filter 30
Can be prevented from rotating with respect to the plug 20. That is, it is possible to prevent the filter 30 from rotating or vibrating with respect to the plug 20 due to the passage of the heat medium or the like. Therefore, it is possible to prevent abrasion, abnormal noise, and the like caused by the filter 30 sliding with respect to the plug 20.

On the other hand, the entire cylindrical wall is bulged radially outward in order to form the enlarged inner peripheral surface 113. However, the inner diameter of the wall is increased only by expanding the inner surface of the wall. The peripheral surface 113 may be formed.

Although the heat medium that has flowed out of the liquid receiver 10 flows into the condenser b again, the heat medium may flow out of the liquid receiver 10 directly to the expansion valve d. However, in order to enhance the cooling effect on the heat medium, it is preferable that the liquid heat medium flows from the receiver 10 into the condenser b again.

[0081]

As described above, according to the present invention, because of the above-described configuration, the following excellent effects can be obtained.

(1) According to the first aspect of the present invention, after the plug is inserted into the receiver main body, the stopper is inserted into one and the other through-holes located on the same straight line.
The retaining means can be extended over the two through holes. Thereby, it is possible to prevent the stopper from coming off the liquid receiver main body. Therefore, the stopper can be easily fixed to the receiver main body, so that the number of assembling steps can be reduced. In addition, since it is not necessary to machine a male screw or a female screw on the outer periphery of the plug or the inner periphery of the receiver main body, it is possible to reduce the processing cost. As a result, manufacturing costs can be reduced.

(2) According to the second aspect of the present invention, after the movable locking projection is locked to the peripheral edge of the other through hole, the retaining means is prevented from falling off to the one through hole side. be able to. Further, since the locking projection is locked to the peripheral portion of one of the through holes, it is possible to prevent the retaining means from falling off to the other through hole. Therefore, the retaining means can be securely held on the receiver body.

Further, by applying an external force to the movable locking projection, the movable locking projection can be moved so as not to be locked to the peripheral edge of the other through hole. Can be easily removed. Therefore, the stopper can be easily attached to and detached from the receiver main body.
The maintainability can be improved.

(3) According to the third aspect of the present invention, after the stopper is inserted into the through hole, the stopper is fixed to the stopper with a set screw, so that the stopper and the stopper are connected to the main body of the receiver. Can be securely held.

Further, as the set screw, an extremely inexpensive set screw mass-produced as a standard product can be used. In addition,
The stopper has a screw hole into which a set screw is screwed. However, the screw hole can be formed easily because the screw hole has a small diameter so that the screw can be screwed. Further, the retaining means may have a simple structure, for example, a flat plate, which can be inserted into the two through holes. Therefore, the cost can be reduced as compared with a conventional one in which a large-diameter male screw or a female screw is machined on the outer periphery of the stopper or the inner periphery of the liquid receiver main body.

Further, since the diameter of the set screw is small, the set screw can be easily tightened with a small torque. Further, in the conventional one, since a large-diameter male screw or female screw is formed on the outer periphery of the stopper or the inner periphery of the receiver main body, if the stopper is slightly inclined, the threads are engaged in a shifted state. In other words, there is a high risk of crushing the screw thread. For this reason, assembly was troublesome. However, in the case of a set screw,
Since the diameter of the screw is small, even if it is slightly inclined, the screw thread does not shift, and the assembly is easy. Therefore, the number of assembling steps can be reduced.

If the thread is crushed,
In the conventional one, not only the stopper but also all the components on the receiver main body side must be replaced. However, in the case of a set screw, it is only necessary to replace the set screw and the plug, and damage when the screw thread is crushed can be minimized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a liquid receiver shown as a first embodiment of the present invention.

FIG. 2 is a bottom view showing the liquid receiver.

FIG. 3 is a view showing the liquid receiver, and is a view as viewed in the direction of the arrow III in FIG. 2;

FIG. 4 is a front view showing a retaining means of the liquid receiver.

FIG. 5 is a view showing a filter in the liquid receiver,
(A) is a plan view, (b) is a cross-sectional view, and (c) is a bottom view.

FIG. 6 is a view showing a stopper in the liquid receiver,
(A) is a plan view, (b) is a cross-sectional view, and (c) is a bottom view.

FIG. 7 is a cross-sectional view of a main part showing a contact state between a filter and a step portion in the liquid receiver.

FIG. 8 is a view showing a desiccant in the liquid receiver,
(A) is a development view showing a cloth, (b) is a front view showing a state in which a moisture absorbing means is closed by a bag, (c) is a front view showing a state in which a cutout is formed in a corner, and (d) is a view (c). FIG.

FIG. 9 is a view showing a desiccant in the liquid receiver, and is a cross-sectional view of a main part showing a problem that occurs when there is no notch in a corner.

FIG. 10 is a front view showing a condenser equipped with the liquid receiver.

FIG. 11 is a side view showing a condenser equipped with the liquid receiver.

FIG. 12 is a view showing a condenser equipped with the liquid receiver, and is a cross-sectional view taken along line XII-XII in FIG.

FIG. 13 is a longitudinal sectional view of a liquid receiver shown as a second embodiment of the present invention.

FIG. 14 is a bottom view showing the liquid receiver.

FIG. 15 is a view showing the liquid receiver, and is a view showing XV-XV in FIG. 14;
It is sectional drawing which follows a line.

FIG. 16 is a front view showing a retaining means of the liquid receiver.

FIG. 17 is a view showing a stopper in the liquid receiver,
(A) is a plan view, (b) is a cross-sectional view, and (c) is a bottom view.

FIG. 18 is a block diagram showing a configuration of a conventional air conditioner.

FIG. 19 is a diagram showing a liquid receiver in the air conditioner,
(A) is an exploded sectional view of a main part, and (b) is a bottom view of the plug.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Liquid receiver 11 Liquid receiver main body 11a, 11b Through-hole 20 Plug 27 Base end surface 42, 43 Detachment means 42a Locking convex part 42b Movable locking convex part 43n Set screw 111 Lower opening part (one opening part)

Claims (3)

[Claims] 1. A liquid receiver main body formed in a cylindrical shape, and a plug inserted from at least one opening of the liquid receiver main body and closing the opening with its base end face facing the opening. In the liquid receiver provided with: In the liquid receiver main body, at a position corresponding to the base end surface of the plug,
Two through-holes arranged on the same line are provided, and these through-holes are provided so as to pass through these through-holes, and are provided with retaining means for retaining the plug body. Receiver. 2. The retaining means extends from one through hole to the other through hole, and is engaged at one end of the retaining means with a peripheral edge of the one through hole. A locking projection is provided at the other end of the retaining means, after passing through the other through-hole, a movable locking projection is provided which moves to the peripheral edge of the through-hole and locks the peripheral edge. The liquid receiver according to claim 1, wherein: 3. The receiving device according to claim 1, wherein the retaining means is fixed to the plug with a set screw while extending from one through hole to the other through hole. Liquid container.