JP3959702B2 - Receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid receiver that is incorporated in an air conditioning facility installed in, for example, an automobile or a house, and performs gas-liquid separation of a heat medium liquefied by a condenser.
[0002]
[Prior art]
In general, as shown in FIG. 12, an air conditioning system used for an air conditioner such as an automobile or a house has a compressor a, a condenser b, a liquid receiver c, an expansion valve d, and an evaporator e through a pipe f. What is connected is 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 exchanges heat with a heat exchange fluid such as air while passing through the condenser b. By releasing latent heat, it begins to condense and liquefy. The high-temperature heat medium mixed in the gas-liquid manner is temporarily stored in the liquid receiver c and separated into gas and liquid. Only the liquid is sent to the expansion valve d, and is injected from a small hole (not shown) by the expansion valve d. As a result, the adiabatic expansion is performed, and a low-temperature and low-pressure mist is sent to the evaporator e.
[0003]
In the evaporator e, the heat medium evaporates and vaporizes by exchanging heat 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 subjected to adiabatic compression, becomes a high-temperature and high-pressure gaseous heat medium, and is sent again to the condenser b. By repeating such a series of cycles, the air conditioning system AC can be used for cooling and heating.
[0004]
In the air conditioning system AC, the liquid receiver c gas-liquid separates the heat medium in which the liquid and gas sent from the condenser b are mixed, and temporarily stores the liquid therein. Furthermore, it plays a role of removing impurities contained in the heat medium in the course of one cycle.
[0005]
That is, as shown in FIG. 13, the liquid receiver c is configured by closing upper and lower openings of a liquid receiver body g formed in a cylindrical shape. However, in the drawing, only the main part for closing the lower opening of the liquid receiver c with the plug h is shown without showing the entire liquid receiver c. The liquid receiver body g is provided with a heat medium outlet (not shown) at an upper position of the peripheral wall g1, and a heat medium inlet g2 at a lower position. .
[0006]
On the other hand, the plug h is formed in a cylindrical shape, and an O-ring (seal member) i is provided in an O-ring groove h1 formed on the outer peripheral surface thereof. The O-ring i is in close contact with the inner surface of the liquid receiver main body g to prevent the heat medium from leaking from between the stopper h and the liquid receiver main body g. A filter j is detachably attached to the distal end surface h2 of the plug h by a screw j3. The filter j is formed in a bottomed cylindrical shape, and contaminants in the heat medium are removed by a filtration membrane j1 provided on the peripheral surface. That is, the inflow port g2 described above is disposed on the side of the filtration membrane j1, and the heat medium that has flowed into the filter j from its tip side flows through the filtration membrane j1 to the inflow port g2. .
[0007]
There is a predetermined gap between the outer peripheral surface of the filter j and the inner peripheral surface of the receiver body g, and the outer periphery of the tip of the filter j is in close contact with the inner peripheral surface of the receiver body g. Part j2 is provided.
[0008]
Further, the plug h is formed with a male screw h3 on the outer periphery on the tip side thereof, and the liquid receiver body g is formed with a female screw g3 that is screwed with the male screw h3 of the plug h. Furthermore, a hexagonal wrench hole h4 is formed in the base end surface of the plug h. That is, the plug h is detachable from the liquid receiver body g by inserting and turning a hexagon wrench (not shown) in the wrench hole h4.
[0009]
When closing the lower opening of the receiver body g with the plug h described above, the filter j is attached to the tip surface h2 of the plug h with the screw j3, and then the filter j and the plug h are attached. Insert it into the receiver body g and turn the plug h with a hexagon wrench in the direction of tightening the screw. As a result, the male screw h3 of the stopper h is engaged with the female screw g3 of the receiver body g, and the stopper h is fixed to the receiver body g. At this time, since the O-ring i is in close contact with the inner peripheral surface of the receiver body g, it is possible to prevent the heat medium from leaking between the receiver body g and the plug h.
[0010]
Further, as shown in FIG. 14, after the bolt k is inserted into the through hole of the receiver body g and the plug h, a nut (not shown) is screwed into the tip of the bolt k so that the plug Some are configured to fix the body h to the receiver body g.
[0011]
[Problems to be solved by the invention]
However, in the conventional liquid receiver c, since a gap is formed between the opening side of the liquid receiver body g and the plug h, a corrosive liquid such as rainwater is formed in the liquid receiver body g from below. When the corrosive liquid intrudes into the receiver body g, the receiver body g corrodes and the heat medium leaks to the outside, which deteriorates the heat exchange performance. . Further, there is a problem that the plug h cannot be removed due to the corrosion of the liquid receiver body g and the filter j cannot be replaced.
[0012]
The present invention has been made in view of the above circumstances, and prevents the invasion of corrosive liquid or the like into the receiver body to increase the life of the receiver and to maintain the heat exchange performance. It is an object to provide a liquid receiver that can be used.
[0013]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a first aspect of the invention is a liquid receiver main body formed in a cylindrical shape, and is inserted from an opening of the liquid receiver main body, and the base end surface is opened toward the opening. A plug for closing the part Gas-liquid separation of the heat medium In the liquid receiver, the inner peripheral surface of the receiver main body includes a reference inner peripheral surface of the receiver main body, and an enlarged inner peripheral surface whose opening side is enlarged from the reference inner peripheral surface. The expanded inner peripheral surface includes a parallel inner peripheral surface having a constant diameter inward from the opening, and a tapered inner peripheral surface that is tapered from the parallel inner peripheral surface to the reference inner peripheral surface. Have Further, the reference inner peripheral surface and the tapered inner peripheral surface, and the tapered inner peripheral surface and the parallel inner peripheral surface are continuously connected via a smooth curved surface, The plug body has a reference diameter portion and a base end portion which are enlarged diameter portions, the reference diameter portion is fitted to the reference inner peripheral surface, and the enlarged diameter portion is parallel to the enlarged inner peripheral surface. A first fitting that is fitted to a peripheral surface and is inserted without being subjected to compressive deformation from the parallel inner peripheral surface between the reference diameter portion of the plug and the reference inner peripheral surface of the receiver body. The seal member is interposed, and the parallel inner peripheral surface is inserted without being subjected to compressive deformation between the stopper on the opening side of the first seal member and the tapered inner peripheral surface of the receiver body. Through the second seal member An annular circumferential groove is provided at a position corresponding to the base end surface of the plug body on the diameter-enlarged inner circumferential surface of the liquid receiver body, and a retaining ring for retaining the plug body is disposed in the circumferential groove. Set up It is characterized by that.
[0014]
Claim 2 The described invention includes a liquid receiver main body formed in a cylindrical shape, and a plug body that is inserted from an opening of the liquid receiver main body and closes the opening with a base end surface facing the opening. Gas-liquid separation of the heat medium In the liquid receiver, the inner peripheral surface of the receiver main body includes a reference inner peripheral surface of the receiver main body, and an enlarged inner peripheral surface whose opening side is enlarged from the reference inner peripheral surface. The expanded inner peripheral surface includes a parallel inner peripheral surface having a constant diameter inward from the opening, and a tapered inner peripheral surface that is tapered from the parallel inner peripheral surface to the reference inner peripheral surface. Have Further, the reference inner peripheral surface and the tapered inner peripheral surface, and the tapered inner peripheral surface and the parallel inner peripheral surface are continuously connected via a smooth curved surface, The plug body has a reference diameter portion and a base end portion which are enlarged diameter portions, the reference diameter portion is fitted to the reference inner peripheral surface, and the enlarged diameter portion is parallel to the enlarged inner peripheral surface. A first fitting that is fitted to a peripheral surface and is inserted without being subjected to compressive deformation from the parallel inner peripheral surface between the reference diameter portion of the plug and the reference inner peripheral surface of the receiver body. A seal member is interposed, and a second seal member is interposed between the enlarged diameter portion of the plug body on the opening side of the first seal member and the parallel inner peripheral surface of the liquid receiver body. An annular circumferential groove is provided at a position corresponding to the base end surface of the plug body on the diameter-enlarged inner circumferential surface of the liquid receiver body, and a retaining ring for retaining the plug body is disposed in the circumferential groove. Set up It is characterized by that.
[0015]
Claim 1, 2 According to the described invention, the first seal member inserted without being subjected to compressive deformation from the parallel inner peripheral surface is interposed between the distal end portion of the stopper and the reference inner peripheral surface of the liquid receiver body. The plug body and the receiver body on the opening side from the first seal member Tapered inner surface on inner surface Alternatively, since the second seal member is interposed between the parallel inner peripheral surface and the first seal member, the heat medium is prevented from leaking from between the plug body and the liquid receiver body to the second, This seal member can prevent corrosive liquid or the like from entering the receiver body. Even if the heat medium passes through the first seal member, the second seal member can prevent leakage to the outside. Even if corrosive liquid or the like passes through the second seal member, the first seal member can prevent the intrusion into the inside. Therefore, leakage of the heat medium to the outside and entry of corrosive liquid or the like into the inside can be reliably prevented, so that the life of the liquid receiver can be increased and the heat exchange performance can be improved.
[0016]
Claim 3 The described invention includes a liquid receiver main body formed in a cylindrical shape, and a plug body that is inserted from an opening of the liquid receiver main body and closes the opening with a base end surface facing the opening. Gas-liquid separation of the heat medium In the liquid receiver, the inner peripheral surface of the receiver main body includes a reference inner peripheral surface of the receiver main body, and an enlarged inner peripheral surface whose opening side is enlarged from the reference inner peripheral surface. The expanded inner peripheral surface includes a parallel inner peripheral surface having a constant diameter inward from the opening, and a tapered inner peripheral surface that is tapered from the parallel inner peripheral surface to the reference inner peripheral surface. Have Further, the reference inner peripheral surface and the tapered inner peripheral surface, and the tapered inner peripheral surface and the parallel inner peripheral surface are continuously connected via a smooth curved surface, The plug body has a reference diameter portion and a base end portion which are enlarged diameter portions, the reference diameter portion is fitted to the reference inner peripheral surface, and the enlarged diameter portion is parallel to the enlarged inner peripheral surface. A first fitting that is fitted to a peripheral surface and is inserted without being subjected to compressive deformation from the parallel inner peripheral surface between the reference diameter portion of the plug and the reference inner peripheral surface of the receiver body. An annular circumferential groove is provided at a position corresponding to the base end surface of the plug body on the parallel inner circumferential surface of the receiver body, and a stopper is prevented from coming off in the circumferential groove. And a second seal member is interposed between the retaining ring and the base end face of the stopper.
[0017]
In this case, the second seal member may be a donut-shaped seal member as long as it is interposed between the retaining ring and the base end surface of the stopper (claims). 4 Or a disc-shaped sealing member (claims) 5 ).
[0018]
Claim 3 According to the described invention, the claims 1, 2 In addition to the described invention, the second sealing member can be attached at the same time that the stopper is easily fixed to the liquid receiver body with one touch. Therefore, it is possible to reduce the number of assembly steps. In addition, since it is not necessary to process a male screw or a female screw, the processing cost can be reduced. Therefore, the manufacturing cost can be reduced.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a liquid receiver according to the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in the component shown by the prior art example, and the description is simplified.
[0020]
◎ First embodiment
FIG. 1 is a longitudinal sectional view showing a first embodiment of the liquid receiver of the present invention, and FIG. 2 is a bottom view of FIG. The liquid receiver 10 includes a liquid receiver body 11 formed in a cylindrical shape, a plug body 20 that is inserted from the lower opening 11a of the liquid receiver body 11 and closes the lower opening 11a, The plug body 20 includes a filter 30 that is attached to the distal end surface 26 located inside the liquid receiver body 11 and captures impurities in the heat medium supplied into the liquid receiver body 11. In this case, an annular circumferential groove 50 is provided on the parallel inner circumferential surface (inner circumferential surface) 11 g of the liquid receiver body 11 at a position corresponding to the base end surface 27 of the plug body 20. A retaining ring 42 for preventing the stopper 20 from coming off is provided.
[0021]
Hereinafter, the above configuration will be described in more detail. That is, the liquid receiver 10 is attached to the condenser b as shown in FIGS.
[0022]
As shown in FIG. 9, the condenser b includes a pair of header pipes 2 a and 2 b, a plurality of heat exchange pipes 3 installed between these header pipes 2 a and 2 b, and a space between each heat exchange pipe 3. The heat exchange fins, for example, corrugated fins 4 that are integrally joined together.
[0023]
The header pipes 2a and 2b are formed in a substantially cylindrical shape by, for example, an aluminum extruded shape, and a cap member 5 is fixedly attached to the upper and lower ends thereof. Also, a heat medium inflow pipe 7 is provided, for example, near the outer upper end of one header pipe 2a (left side in FIG. 9), and the outer lower end of the other header pipe 2b (right side in FIG. 9). A heat medium outlet 8 is provided in the vicinity. Further, as shown in FIGS. 1 and 10, the header pipe 2a is provided with a heat medium outflow hole 9a and an inflow hole 9b in order to communicate with the liquid receiver 10. The liquid receiver 10 is brazed integrally with 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.
[0024]
Moreover, as shown in FIG.9 and FIG.11, the heat exchange pipe | tube 3 is formed in the flat plate shape, for example by the extruded shape member made from aluminum, and the inside is made into the some penetrated toward a longitudinal direction. A partitioned heat medium flow path (not shown) is formed. Both ends of the heat exchange pipe 3 formed in this way are inserted and fixed in a plurality of slits (not shown) arranged in parallel with each other on the opposite sides of the side surfaces of both header pipes 2a and 2b. Has been.
[0025]
As shown in FIG. 9, the heat exchange fins, that is, the corrugated fins 4 are formed in a continuous wave shape by bending an aluminum plate, and are interposed between the heat exchange tubes 3 and brazed. ing. In this case, the corrugated fins 4 are also brazed and joined to the outer sides of the heat exchange tubes 3 arranged at the uppermost and lowermost stages, and both the corrugated fins 4 are protected in order to protect the corrugated fins 4. Further, the side plate 6 is brazed and joined to the outer side.
[0026]
As shown in FIGS. 1 and 11, the liquid receiver body 11 that is one component of the liquid receiver 10 is formed into a cylindrical shape by, for example, an aluminum extruded shape. Joint portions 16 and 17 for brazing to the header pipe 2a are integrally formed at each position. As shown in FIG. 1, the lower joint portion 17 is formed with an outlet 12 at a position corresponding to the outflow hole 9 a of the header pipe 2 a and at a position corresponding to the inflow hole 9 b. An inflow port 13 is formed.
[0027]
The outflow hole 9 a and the outflow port 12 communicate with the upper side of the partition plate 9 c in the header pipe 2 a and the inlet side of the filter 30 in the receiver body 11. On the other hand, the inflow hole 9b and the inflow port 13 communicate with the lower side of the partition plate 9c in the header pipe 2a and the outlet side of the filter 30 in the liquid receiver body 11.
[0028]
Further, the upper opening portion 11 b of the liquid receiver body 11 is closed by the cap member 15. The cap member 15 is made of aluminum, and is fixed to the receiver body 11 by brazing, for example. The inner peripheral surface of the liquid receiver body 11 is formed by a reference inner peripheral surface 11e and an enlarged inner peripheral surface 11h having a circular cross section. The reference inner peripheral surface 11e corresponds to the first reference inner peripheral surface 11c corresponding to the portion that accommodates the desiccant 44 and the portion that accommodates the filter 30, and is slightly expanded in diameter from the first reference inner peripheral surface 11c. It is formed by the second reference inner peripheral surface 11d. And as shown in FIG. 1, the part of the boundary of the 1st reference | standard internal peripheral surface 11c and the 2nd reference | standard internal peripheral surface 11d is the step part 11i.
[0029]
As shown in FIG. 1, the enlarged inner peripheral surface 11h is obtained by expanding the diameter of a portion that was originally the second reference inner peripheral surface 11d by plastic processing such as spinning, and is parallel to the parallel inner peripheral surface 11g. It is formed by the peripheral surface 11f. The second reference inner peripheral surface 11d and the tapered inner peripheral surface 11f, and the tapered inner peripheral surface 11f and the parallel inner peripheral surface 11g are continuously formed via a smooth curved surface.
[0030]
As shown in FIGS. 1 and 4, the plug body 20 is formed in a circular cross-section with a metal such as aluminum, and a distal end portion fitted to the second reference inner peripheral surface 11 d has a reference diameter portion 21. The base diameter side portion of the reference diameter portion 21 is the enlarged diameter portion 22. An O-ring groove 23 for attaching an O-ring 41 serving as a first seal member is formed on the distal end side of the reference diameter portion 21, and a second end is provided on the proximal end side of the O-ring groove 23. A seal packing groove 24 for attaching a seal packing 43 as a seal member is formed. The enlarged diameter portion 22 is formed so as to be fitted to the parallel inner peripheral surface 11g, and has an axial length slightly shorter than the parallel inner peripheral surface 11g.
[0031]
As shown in FIG. 4B, the O-ring 41 and the seal packing 43 bulge out in an arc shape from the outer peripheral surface of the reference diameter portion 21 when attached to the O-ring groove 23 or the seal packing groove 24. . However, the diameter of the parallel inner peripheral surface 11g is equal to or larger than the outer diameter of the O-ring 41 and the seal packing 43. For this reason, when the plug body 20 is inserted into the receiver body 11, the O-ring 41 and the seal packing 43 are not subjected to compressive deformation from the parallel inner peripheral surface 11g. However, as shown in FIG. 1, the O-ring 41 is compressed and deformed substantially to the outer diameter of the reference diameter portion 21 in a state of being inserted into the second reference inner peripheral surface 11d, and is in close contact with the second reference inner peripheral surface 11d. It is supposed to be. On the other hand, as shown in FIG. 1, when the seal packing 43 is inserted into the tapered inner peripheral surface 11f, the seal packing 43 is compressed and deformed substantially to the outer peripheral diameter of the tapered inner peripheral surface 11f so as to be in close contact with the tapered inner peripheral surface 11f. It has become.
[0032]
Further, as shown in FIGS. 1 and 2, a circumferential groove 50 that fits and holds the retaining ring 42 is formed on the parallel inner peripheral surface 11 g of the liquid receiver body 11. The position of the circumferential groove 50 is such that the retaining ring 42 fitted in the circumferential groove 50 just contacts the base end surface 27 of the plug body 20 in a state where a seal portion 30d of the filter 30 described later contacts the step portion 11i. It has become.
[0033]
The retaining ring 42 is formed in a substantially C shape as shown by the oblique line intersecting with the 45 degree direction in FIG. 2, and is locked at each end portion in the circumferential direction and facing each other. A hole 42a is formed. Then, the diameter of each locking hole 42a is elastically reduced by being deformed by a jig in a direction in which the locking holes 42a are brought close to each other. By inserting the locking holes 42a into the parallel inner peripheral surface 11g, It is possible to easily fit into the groove 50.
[0034]
Further, as shown in FIGS. 1, 2 and 4, the plug body 20 has a cylindrical portion 20a from the base end surface 27 to a predetermined position on the distal end side, and a portion on the distal end side from the cylindrical portion 20a. Is a cylindrical portion 20b. The O-ring groove 23 and the seal packing groove 24 described above are formed in the reference diameter portion 21. In addition, a projection 20c that protrudes from the axial center position of the columnar portion 20b to the proximal end side is provided in the cylindrical portion 20a. The protrusion 20 c is formed at a height that does not protrude from the base end face 27.
[0035]
Further, the plug body 20 is formed with a concave portion 26a having a predetermined depth extending in the axial direction at the axial center position of the distal end surface 26 thereof. The recess 26a has a circular cross section.
[0036]
As shown in FIGS. 1 and 3, the filter 30 has a cylindrical peripheral wall portion 30a and a bottom wall portion 30b that closes one open end of the peripheral wall portion 30a. The bottom surface 33 is attached so as to be in contact with the distal end surface 26 of the plug body 20, and the bottom surface 33 of the bottom wall portion 30b is provided with a convex portion 33a that fits into the concave portion 26a.
[0037]
That is, the filter 30 includes a filter body 31 integrally formed of, for example, nylon as a synthetic resin, and a filtration membrane 32 that is also formed of nylon in a mesh shape. The filter body 31 has a peripheral wall portion 30a formed in a cylindrical shape, and a bottom wall portion 30b is formed below the peripheral wall portion 30a. The upper side of the peripheral wall portion 30a is opened as it is, and a cylindrical seal portion 30d is formed on the outer periphery of the opening end on the upper side via a flange portion 30c.
[0038]
As shown in FIG. 3, a window 30 e is formed in the circumferential wall portion 30 a at a position equally divided into four in the circumferential direction. Each window 30e is formed in a quadrangular shape when viewed from the side, and a space between the windows 30e is a column 30f on the peripheral wall 30a.
[0039]
A convex portion 33 a is formed at the axial center position of the bottom surface 33 of the bottom wall portion 30 b. The convex portion 33a has a circular cross section, and is fitted into the concave portion 26a. The fitting accuracy of the convex portion 33a and the concave portion 26a is a fitting tolerance of a clearance fit that can be easily fitted.
[0040]
The collar portion 30c is formed thin and is connected to a substantially central position in the axial direction of the seal portion 30d. The seal portion 30d is formed to be slightly larger than the diameter of the second reference inner peripheral surface 11d so that the outer diameter forms an interference fit with the second reference inner peripheral surface 11d. That is, the seal portion 30d receives a compressive force from the second reference inner peripheral surface 11d, and is elastically slightly deformed together with the flange portion 30c, so as to be in close contact with the second reference inner peripheral surface 11d. Further, the tip edge portion of the seal portion 30d comes into contact with the stepped portion 11i in a predetermined pressure state in a state where the stopper body 20 is fixed to the liquid receiver body 11 by the retaining ring 42. As a result, the filter 30 is not separated from the plug body 20.
[0041]
The filtration membrane 32 is formed in a net shape with, for example, nylon thread, and is fixed integrally to the filter body 31 when the filter body 31 is formed. However, the filter membrane 32 may be configured to be completely integrated with the filter body 31 by forming a plurality of holes in the filter body 31 in a mesh shape.
[0042]
In order to assemble the liquid receiver 10 configured as described above, first, the desiccant 44 is inserted into the liquid receiver body 11, and then the plug body 20 having the filter 30 is connected to the liquid receiver body from the filter 30 side. 11 is inserted. At this time, since the diameter of the parallel inner peripheral surface 11g is formed larger than the diameter of the second reference inner peripheral surface 11d, the seal portion 30d of the filter 30 is not caught by the lower opening 11a or the peripheral groove 50. , Smoothly enters the parallel inner peripheral surface 11g. Further, the seal portion 30d enters the second reference inner peripheral surface 11d while being smoothly compressed and deformed so as to be guided by the tapered inner peripheral surface 11f, and is in close contact with the reference inner peripheral surface 11d with a predetermined pressure. Become.
[0043]
On the other hand, although the O-ring 41 has a large bulge amount from the reference diameter portion 21, the diameter of the parallel inner peripheral surface 11g is formed to a diameter that does not compressively deform the O-ring 41. It smoothly enters the parallel inner circumferential surface 11g without being caught by the opening 11a or the circumferential groove 50. Further, the O-ring 41 enters the second reference inner peripheral surface 11d while being smoothly compressed and deformed while being guided by the tapered inner peripheral surface 11f, and is in close contact with the reference inner peripheral surface 11d with a predetermined pressure. Become. The seal packing 43 also has a large bulging amount from the reference diameter portion 21, but the diameter of the parallel inner peripheral surface 11 g is formed to a diameter that does not compress and deform the seal packing 43. Without being caught in the opening 11a or the circumferential groove 50, the air smoothly enters the parallel inner peripheral surface 11g and is in close contact with the tapered inner peripheral surface 11f with a predetermined pressure.
[0044]
Then, the seal portion 30d of the filter 30 contacts the step portion 11i, and the flange portion 30c and the like are elastically deformed by a predetermined amount. Due to this deformation, a predetermined amount of pressure is applied from the filter 30 to the step portion 11i, and at this time, the proximal end surface 27 of the plug body 20 and the inner side surface of the circumferential groove 50 are substantially in agreement. Therefore, the retaining ring 42 elastically reduced in diameter is inserted into the parallel inner peripheral surface 11g from the lower opening 11a, and the diameter reduction deformation of the retaining ring 42 is released at the position of the circumferential groove 50. Then, the retaining ring 42 is elastically expanded in diameter and fitted into the circumferential groove 50, and the base end surface 27 of the plug body 20 comes into contact with the retaining ring 42. As a result, the position of the plug 20 is determined, and the seal portion 30d of the filter 30 continues to be kept pressed against the step portion 11i with a predetermined pressure.
[0045]
On the other hand, the desiccant 44 and the filter 30 can be easily exchanged by reducing the diameter of the retaining ring 42 and removing it from the circumferential groove 50 and the parallel inner peripheral surface 11g, and then pulling out the plug body 20 from the receiver body 11. Can be done. The plug 20 can be easily removed by grasping the protrusion 20c with a gripping means such as pliers and pulling it out. Further, the filter 30 can be easily attached to and detached from the plug body 20 by inserting or pulling out the convex portion 33a into the concave section 26a of the plug body 20.
[0046]
In addition, a heat medium flows into the receiver 10 assembled as described above from the outflow hole 9a of the header pipe 2a in the condenser b through the outflow port 12, and this heat medium is used as the desiccant 44 and the filter. 30 penetrates and passes. Thereby, impurities and moisture contained in the heat medium can be removed. Of the heat medium purified in this way, the liquefied part passes through the inlet hole 9b of the header pipe 2a from the inlet 13 and flows into the header pipe 2a and is cooled again by the condenser b. Thus, the gas portion remains in the upper part of the receiver body 11.
[0047]
According to the liquid receiver 10 configured as described above, the stopper 20 is inserted into the liquid receiver body 11 from the lower opening 11a, and then the retaining ring 42 is fitted into the circumferential groove 50. The stopper 20 can be fixed to the liquid receiver body 11. Therefore, the assembly man-hour can be reduced. In addition, since it is not necessary to process a male screw or a female screw as shown in the conventional example, the processing cost can be reduced. Therefore, the manufacturing cost can be reduced.
[0048]
Further, the O-ring 41 and the seal packing 43 can be inserted up to the second reference inner peripheral surface 11d without being caught by the lower opening 11a, the circumferential groove 50, or the like. Further, the seal portion 30d of the filter 30 can also be inserted into the second reference inner peripheral surface 11d without being caught by the lower opening portion 11a, the circumferential groove 50, or the like. Therefore, the plug body 20 can be easily inserted into the receiver body 11 without damaging the O-ring 41, the seal packing 43, and the filter 30, and the O-ring 41 is sufficiently compressed and deformed. The heat medium can be reliably prevented from leaking from between the main body 11 and the plug body 20, and the seal packing 43 is sufficiently compressed and deformed to prevent the heat medium from between the liquid receiver main body 11 and the plug body 20. It is possible to reliably prevent the corrosive liquid or the like from entering the inside. In addition, since the tapered inner peripheral surface 11f and the second reference inner peripheral surface 11d are smoothly and continuously connected, the O-ring 41 and the seal packing 43 are damaged when they are subjected to compressive deformation in the receiver body 11. There is no.
[0049]
Further, the filter 30 is in a state in which the seal portion 30d is in close contact with the reference inner peripheral surface 11d with a predetermined pressure, and the contact range is elongated in the axial direction, so that the heat medium passes outside the seal portion 30d. It is possible to reliably prevent bypassing. Therefore, the filtration performance of the filter 30 can be improved.
[0050]
Further, since the filter 30 can be easily attached to the plug body 20 by simply fitting the convex portion 33a and the concave portion 26a, the filter can be compared with the case where the filter is fixed to the plug body with screws as in the prior art. 30 is very easy to install and remove. Therefore, the number of steps for attaching the filter 30 to the plug body 20 can be reduced. In addition, since no screws are required, the number of parts can be reduced, and the number of processing steps such as making screw holes can be reduced. As a result, when mass production is performed, particularly significant cost reduction can be achieved.
[0051]
Furthermore, since the shaft center of the plug body 20 and the shaft center of the filter 30 can be easily matched by fitting the convex portion 33a and the concave portion 26a, the shaft center of the filter 30 is eventually aligned with the receiver body 11. Can be easily matched to the axis. That is, in the conventional case where the filter is fixed to the plug with a screw, it has been difficult to match the axis of the filter with the axis of the plug, but in this embodiment, the alignment of the axis is very simple. become. Therefore, also from this point, the number of assembly steps can be reduced.
[0052]
Furthermore, in the state where the stopper 20 is fixed to the receiver body 11 with the retaining ring 42, the tip of the seal portion 30d of the filter 30 is locked to the step portion 11i with a predetermined pressure. It is possible to reliably prevent 30 from being separated from the plug body 20. In addition, the contact area between the tip of the seal portion 30d and the step portion 11i increases the area that the seal portion 30d seals, so that it is possible to more reliably prevent the heat medium from bypassing the outside of the filter 30. it can.
[0053]
◎ Second embodiment
FIG. 5 is an enlarged cross-sectional view showing a main part of a second embodiment of the liquid receiver of the present invention. The second embodiment is a case where the seal packing 43 is attached to another position of the plug body 20 to seal the gap with the inner peripheral surface of the liquid receiver body 11. That is, as shown in FIG. 5, the seal packing groove 25 is formed in the enlarged diameter portion 22 of the plug body 20, and the seal packing 43 is attached in the seal packing groove 25.
[0054]
The seal packing 43 attached in this manner swells in an arc shape from the outer peripheral surface of the enlarged diameter portion 22 in a state of being attached to the seal packing groove 25, and the plug body 20 is inserted into the receiver body 11. When the seal packing 43 is inserted into the parallel inner peripheral surface 11g, the seal packing 43 is compressed and deformed so as to be in close contact with the parallel inner peripheral surface 11g. Therefore, it is possible to prevent the corrosive liquid or the like from entering the inside.
[0055]
In the second embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.
[0056]
◎ Third embodiment
FIG. 6 is an enlarged cross-sectional view of a third embodiment of the liquid receiver of the present invention. In the third embodiment, the seal packing is easily attached. That is, as shown in FIG. 6, an annular circumferential groove 50A is provided at a position corresponding to the proximal end surface of the plug body 20 on the inner circumferential surface of the liquid receiver body 11, and the plug body is provided in the circumferential groove 50A. This is a case where a retaining ring 42 for retaining 20 is disposed, and a donut-shaped seal packing 43A as a second sealing member is interposed between the retaining ring 42 and the base end surface of the plug body 20. In this case, the circumferential groove 50A is formed to have a width corresponding to the thickness of the retaining ring 42 and the thickness of the seal packing 43A. In order to attach the seal packing 43A, as described above, after inserting the plug 20 into the lower opening 11a of the receiver body 11, the seal packing 43A is inserted into the circumferential groove 50A and elastically The reduced diameter retaining ring 42 is inserted into the circumferential groove 50A, the diameter reduction deformation is released, and the retaining ring 42 is fitted into the circumferential groove 50A. As a result, the seal packing 43 </ b> A is in close contact with the proximal end surface 27 of the plug body 20.
[0057]
In addition, in 3rd embodiment, since another part is the same as said 1st embodiment, the same code | symbol is attached | subjected to the same part and description is abbreviate | omitted.
[0058]
◎ Fourth embodiment
FIG. 7 is an enlarged cross-sectional view of a fourth embodiment of the liquid receiver of the present invention, and FIG. 8 is a bottom view of FIG. In the fourth embodiment, instead of the donut-shaped seal packing 43A in the third embodiment, a disc-shaped seal packing 43B is used, and the seal packing 43B is brought into close contact with the entire region of the base end surface 27 of the plug body 20, This is a case where the sealing performance can be improved. That is, as shown in FIGS. 7 and 8, similarly to the third embodiment, an annular circumferential groove 50A is formed at a position corresponding to the base end surface of the plug body 20 on the inner circumferential surface of the liquid receiver body 11. When the retaining ring 42 is disposed in the circumferential groove 50A, and the disc-shaped seal packing 43B as the second sealing member is interposed between the retaining ring 42 and the base end surface of the plug body 20. It is. As a result, the seal packing 43B is in close contact with the entire surface of the base end face 27 of the plug body 20, so that corrosive liquid such as rainwater or the like can enter the receiver body 11 from the opening 11a of the receiver body 11. Can be surely prevented from entering.
[0059]
In the fourth embodiment, the other parts are the same as those in the first embodiment. Therefore, the same parts are denoted by the same reference numerals and description thereof is omitted.
[0060]
◎ Other embodiments
In each of the above embodiments, the entire cylindrical wall portion is bulged outwardly in the radial direction in order to form the enlarged inner peripheral surface 11h. However, only the inner surface of the wall portion is expanded to increase the diameter. The inner diameter peripheral surface 11h may be formed.
[0061]
Further, although the heat medium that has flowed out of the liquid receiver 10 is made to flow again into the condenser b, this heat medium may be allowed to flow out of the liquid receiver 10 to the expansion valve d as it is. However, in order to enhance the cooling effect on the heat medium, it is preferable that the liquid heat medium flows into the condenser b from the liquid receiver 10 again.
[0062]
【The invention's effect】
As described above, according to the present invention, since it is configured as described above, the following excellent effects can be obtained.
[0063]
(1) Claim 1, 2 According to the described invention, the first seal member inserted without being subjected to compressive deformation from the parallel inner peripheral surface is interposed between the distal end portion of the stopper and the reference inner peripheral surface of the liquid receiver body. The plug body and the receiver body on the opening side from the first seal member Tapered inner surface on inner surface Alternatively, since the second seal member is interposed between the parallel inner peripheral surface and the first seal member, the heat medium is prevented from leaking from between the plug body and the liquid receiver body to the second, This seal member can prevent corrosive liquid or the like from entering the receiver body. Even if the heat medium passes through the first seal member, the second seal member can prevent leakage to the outside. Even if corrosive liquid or the like passes through the second seal member, the first seal member can prevent the intrusion into the inside. Therefore, leakage of the heat medium to the outside and entry of corrosive liquid or the like into the inside can be reliably prevented, so that the life of the liquid receiver can be increased and the heat exchange performance can be improved.
[0064]
(2) Claim 3 According to the described invention, in addition to the above (1), the second sealing member can be attached at the same time that the stopper is simply fixed to the liquid receiver main body with one touch, so that the number of assembling steps can be reduced. it can. In addition, since it is not necessary to process a male screw or a female screw, the processing cost can be reduced and the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of a liquid receiver of the present invention.
FIG. 2 is a bottom view showing the liquid receiver.
3A and 3B are diagrams showing a filter in the liquid receiver, wherein FIG. 3A is a plan view, FIG. 3B is a cross-sectional view, and FIG. 3C is a bottom view.
4A and 4B are diagrams showing a plug body in the liquid receiver, wherein FIG. 4A is a plan view, FIG. 4B is a cross-sectional view, and FIG. 4C is a bottom view.
FIG. 5 is an enlarged sectional view showing a second embodiment of the liquid receiver of the present invention.
FIG. 6 is an enlarged sectional view showing a third embodiment of the liquid receiver of the present invention.
FIG. 7 is an enlarged sectional view showing a fourth embodiment of the liquid receiver of the present invention.
FIG. 8 is a bottom view of FIG. 7;
FIG. 9 is a front view showing a condenser equipped with the liquid receiver.
FIG. 10 is a side view showing a condenser equipped with the liquid receiver.
11 is a view showing a condenser equipped with the liquid receiver, and is a cross-sectional view taken along line XI-XI in FIG.
FIG. 12 is a block diagram showing a configuration of a conventional air conditioner.
FIGS. 13A and 13B are diagrams showing a liquid receiver in the air conditioner, wherein FIG. 13A is an exploded cross-sectional view of the main part, and FIG. 13B is a bottom view of the plug body.
FIG. 14 is a cross-sectional view of a main part showing another liquid receiver in the air conditioner.
[Explanation of symbols]
10 Liquid receiver
11 Receiver body
20 Plug body
23 O-ring groove
24, 25 Seal packing groove
27 Base end face
41 O-ring (first seal member)
42 Retaining ring
43, 43A, 43B Seal packing (second seal member)
50, 50A circumferential groove

Claims (5)

A liquid receiver main body formed in a cylindrical shape, and a plug inserted through the opening of the liquid receiver main body and closing the opening with the base end surface facing the opening , In a liquid receiver that separates gas and liquid ,
The inner peripheral surface of the receiver body has a reference inner peripheral surface of the receiver body and an enlarged inner peripheral surface whose opening side is expanded from the reference inner peripheral surface. The peripheral surface has a parallel inner peripheral surface having a constant diameter inward from the opening, and a tapered inner peripheral surface that is tapered from the parallel inner peripheral surface to the reference inner peripheral surface . The reference inner circumferential surface and the tapered inner circumferential surface, and the tapered inner circumferential surface and the parallel inner circumferential surface are continuously connected via a smooth curved surface,
The plug body has a reference diameter portion and a base end portion which are enlarged diameter portions, the reference diameter portion is fitted to the reference inner peripheral surface, and the enlarged diameter portion is parallel to the enlarged inner peripheral surface. Mated to the circumference,
Between the reference diameter portion of the plug and the reference inner peripheral surface of the receiver body is interposed a first seal member inserted without being subjected to compressive deformation from the parallel inner peripheral surface, A second seal member inserted without compression deformation from the parallel inner peripheral surface is interposed between the plug body on the opening side of the first seal member and the tapered inner peripheral surface of the receiver body. and it will be,
An annular circumferential groove is provided at a position corresponding to the base end face of the plug body on the inner diameter expansion surface of the receiver body, and a retaining ring for retaining the plug body is disposed in the circumferential groove. receiver characterized by comprising Te. A liquid receiver main body formed in a cylindrical shape, and a plug inserted through the opening of the liquid receiver main body and closing the opening with the base end face facing the opening , In liquid receiver for gas-liquid separation ,
The inner peripheral surface of the receiver body has a reference inner peripheral surface of the receiver body and an enlarged inner peripheral surface whose opening side is expanded from the reference inner peripheral surface. The peripheral surface has a parallel inner peripheral surface having a constant diameter inward from the opening, and a tapered inner peripheral surface that is tapered from the parallel inner peripheral surface to the reference inner peripheral surface . The reference inner peripheral surface and the tapered inner peripheral surface, and the tapered inner peripheral surface and the parallel inner peripheral surface are continuously connected via a smooth curved surface,
The plug body has a reference diameter portion and a base end portion which are enlarged diameter portions, the reference diameter portion is fitted to the reference inner peripheral surface, and the enlarged diameter portion is parallel to the enlarged inner peripheral surface. Mated to the circumference,
Between the reference diameter portion of the plug body and the reference inner peripheral surface of the receiver body is interposed a first seal member inserted without being subjected to compressive deformation from the parallel inner peripheral surface, A second seal member is interposed between the enlarged diameter portion of the plug body on the opening side of the first seal member and the parallel inner peripheral surface of the receiver body ,
An annular circumferential groove is provided at a position corresponding to the base end face of the plug body on the inner diameter expansion surface of the receiver body, and a retaining ring for retaining the plug body is disposed in the circumferential groove. receiver characterized by comprising Te. A liquid receiver main body formed in a cylindrical shape, and a plug inserted through the opening of the liquid receiver main body and closing the opening with the base end face facing the opening , In liquid receiver for gas-liquid separation ,
The inner peripheral surface of the receiver body has a reference inner peripheral surface of the receiver body and an enlarged inner peripheral surface whose opening side is expanded from the reference inner peripheral surface. The peripheral surface has a parallel inner peripheral surface having a constant diameter inward from the opening, and a tapered inner peripheral surface that is tapered from the parallel inner peripheral surface to the reference inner peripheral surface . The reference inner peripheral surface and the tapered inner peripheral surface, and the tapered inner peripheral surface and the parallel inner peripheral surface are continuously connected via a smooth curved surface,
The plug body has a reference diameter portion and a base end portion which are enlarged diameter portions, the reference diameter portion is fitted to the reference inner peripheral surface, and the enlarged diameter portion is parallel to the enlarged inner peripheral surface. Mated to the circumference,
Between the reference diameter portion of the plug body and the reference inner peripheral surface of the receiver body, a first seal member inserted without compression deformation from the parallel inner peripheral surface is interposed,
An annular circumferential groove is provided at a position corresponding to the base end surface of the plug body on the parallel inner peripheral surface of the receiver body,
A retaining ring for retaining the stopper is disposed in the circumferential groove, and a second seal member is interposed between the retaining ring and the base end surface of the stopper. Liquid receiver. The liquid receiver according to claim 3,
The liquid receiver, wherein the second seal member is a donut-shaped seal member. The liquid receiver according to claim 3,
The liquid receiver, wherein the second seal member is a disc-shaped seal member.

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