JP2009276011A - Liquid receiver integral type condenser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive liquid receiver integral type condenser having a simplified structure while securing the airtightness of the liquid receiver. <P>SOLUTION: In the liquid receiver integral type condenser having the liquid receiver provided integrally with the condenser, grooves extended in the circumferential direction are formed in axial two positions on the inner face of a liquid receiver body in the vicinity of a lower opening end of the liquid receiver body. A C-ring is fitted to at least one of the grooves and a cap having a filter is fixed between the grooves. An O-ring is interposed between the outer peripheral face of the cap and the inner face of the liquid receiver body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a receiver-integrated condenser in which a receiver is provided integrally with a condenser.

  In a conventional condenser integrated with a receiver, several structures for closing the lower open end of the receiver are known. In the structure described in Patent Document 1, a female screw member made of aluminum is brazed to one end side of the liquid receiver in advance so that the male screw cap fitted into the end of the liquid receiver does not come off due to the refrigerant pressure applied to the inside of the liquid receiver. The male thread of the male thread cap is fitted into the female thread part. Furthermore, in order to ensure airtightness inside the liquid receiver, an O-ring is fitted in advance to the male screw cap, and the male screw cap is in contact with a seal portion inside the liquid receiver via the O-ring.

Further, in the structure described in Patent Document 2, the cap is positioned by concentrically expanding the lower end of the liquid receiver body so that the cap does not go too far into the interior of the liquid receiver. Further, a groove is provided on the inner surface of the receiver body and a retaining ring is fitted so that the cap does not come off due to the refrigerant pressure applied inside the receiver.
JP 2001-033121 A Japanese Patent No. 3482612

  In the device described in Patent Document 1, since the male screw cap is a resin molded product, the screw thread on the female screw side is larger than the case of a metal cap such as aluminum in order to attach it to a liquid receiver having a high internal pressure. Cutting must be done to increase. Then, the thread on the male screw side must be increased, and the processing time of the male screw cap becomes longer, so that the processing cost and part cost increase. In addition, the seal part with which the O-ring abuts inside the liquid receiver requires high roundness and fine surface roughness. However, when the liquid receiver body is extruded, the roundness and surface Roughness variation increases. As a result, the male screw cap and the O-ring cannot be correctly inserted into the liquid receiver, and the seal part where the O-ring abuts inside the liquid receiver cannot be secured sufficiently. There has been a problem that a processed cylindrical female screw member is required.

  In Patent Document 2, in order to expand the lower end of the liquid receiver body concentrically, the liquid receiver body must be a cylindrical tube. That is, when the cross section of the liquid receiver body has an irregular shape, the material is difficult to stretch uniformly, so that it is difficult to expand the tube. Accordingly, when connecting the cylindrical liquid receiver and the cylindrical header pipe with a predetermined interval, the joint must be processed into a complicated shape, which increases the processing cost.

  Therefore, the object of the present invention is to pay attention to the above-mentioned problems, and the liquid receiver that can improve the assemblability and the airtightness with a simple processing and a simple structure without increasing the processing cost and the component cost. It is in providing a condenser integrated condenser.

  In order to solve the above problems, a receiver-integrated condenser according to the present invention is a receiver-integrated condenser in which a receiver is provided integrally with a condenser. Grooves extending in the circumferential direction are formed in two axial directions on the inner surface of the receiver body near the end, and a C-ring is fitted into at least one of the groove parts, and a cap provided with a filter is fixed between the groove parts. In addition, an O-ring is interposed between the outer peripheral surface of the cap and the inner surface of the receiver body. That is, basically, the cap is fixed with a C-ring fitted in the groove, and the cost is increased with a simple structure in which the O-ring on the outer peripheral surface of the cap seals between the inner surface of the receiver body. It is intended to ensure good sealing and assembly.

  In such a receiver-integrated condenser according to the present invention, a C-ring can be fitted in both of the two grooves, but one of the grooves located near the lower opening end. A C-ring is fitted to the groove portion, and a claw portion provided on the upper surface side of the cap is fitted to the other groove portion. With this structure, it becomes possible to reduce the number of points used for the C-ring as compared to the case where the C-ring is fitted to both of the two grooves while ensuring airtightness at the lower opening end of the receiver body. Furthermore, assembly work can be facilitated.

  The groove width of the one groove portion is preferably smaller than the groove width of the other groove portion. With such a structure, when the cap is inserted, the one groove portion can be smoothly overcome in the process of moving the claw portion to the other groove portion.

  Moreover, in the structure which concerns on this invention, when cutting the seal part which an O-ring contact | abuts, it is preferable to implement a process simultaneously with the process of cutting two groove parts. As a result, the roundness and surface roughness of the seal portion can be maintained with high accuracy without increasing the number of processing steps, so that the assemblability and the airtightness can be further improved.

  In the receiver-integrated condenser according to the present invention, it is preferable that the O-ring is previously fitted on the outer peripheral surface of the cap. As a result, it is possible to prevent the O-ring from being soiled or lost during the assembling work, and to further facilitate the assembling work.

  In the receiver-integrated condenser of the present invention, it is preferable that the transverse cross-sectional shape with respect to the axial direction of the inner surface of the receiver body is formed constant in a region sandwiched between one groove and the other groove. That is, in the present invention, grooves extending in the circumferential direction are formed in two axial directions on the inner surface of the receiver body near the lower opening end of the receiver body, and a C-ring is fitted into at least one of the grooves. Therefore, the cap is positioned so as not to move in the axial direction, so that the cap does not enter the inside of the liquid receiver body too much without complicated pipe expansion processing. Furthermore, since the pipe expansion process is unnecessary, an increase in processing cost can be suppressed even when the cross section of the liquid receiver body has an irregular shape, and the degree of freedom in designing the liquid receiver is improved.

  In the receiver-integrated condenser of the present invention, it is preferable that the cross-sectional shape of the outer surface of the receiver body with respect to the axial direction is formed into a shape having a convex portion protruding toward the header pipe side of the condenser. According to the receiver-integrated condenser of the present invention, it is possible to form the cross section of the receiver body into an irregular extruded shape or the like while suppressing an increase in processing cost. A suitable shape can be easily employed to connect the header pipe of the vessel.

  Even when the receiver pipe and the header pipe of the condenser are fixed to each other via the connecting member, the shape of the connecting member can be simplified according to the receiver-integrated condenser of the present invention.

  The connecting member is preferably formed shorter than the receiver body. By forming the connection member in this way, it is possible to separate the receiver body from the header pipe at a location where the connection member is not joined, and the heat of the high-temperature refrigerant at the top of the header pipe is transferred to the receiver body side. Conduction can be suppressed. Further, since the outer surface of the receiver body to which the connecting member is not joined does not need to be cut in particular, the processing can be simplified.

  The connecting member is fitted into at least one of a communication hole with the condenser header pipe formed in the liquid receiver body and a communication hole with the liquid receiver body formed in the header pipe of the condenser. It is preferable that a fitting portion to be formed is formed. By using the connection member having such a structure, the assembling work is further facilitated.

  The receiver-integrated condenser according to the present invention is basically applicable to any refrigeration circuit, but is particularly used for a vehicle air conditioner that is rigorously reduced in cost and improved in assembly and mass-produced. And suitable.

  As described above, according to the receiver-integrated condenser of the present invention, the cap fixing mechanism to the lower opening end of the receiver body can be improved, and further, the connection mechanism between the receiver body and the header pipe can be improved. Since it did in this way, the airtightness of a liquid receiver and an assembly | attachment property can be improved with a simple structure, without increasing parts cost and processing cost.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a receiver-integrated condenser according to an embodiment of the present invention. In this embodiment, the receiver-integrated condenser 1 forms a heat exchanger core 4 by alternately laminating a plurality of tubes 2 and fins 3. A plate 5 is arranged. A pair of header pipes 6 are connected to both ends of the core 4 in the tube axial direction, and each tube 2 communicates with each header pipe 6.

A plurality of disc-shaped partition plates 7 are provided inside each header pipe 6, and the flow of the refrigerant is controlled by dividing the inside of the header pipe 6 into a plurality of regions. That is, in FIG. 1, the refrigerant that has flowed into the first section of the left header pipe 6 from the refrigerant introduction pipe connected to the upper connector 8 of the left header pipe 6 via the inlet flange is the first consisting of several tubes 2. The tubes in the tube group circulate in the right direction from the left end and are collected in the first section of the right header pipe 6, and then the tubes in the second tube group consisting of several other tubes 2 from here to the left direction from the right end. It is distributed and collected in the second section of the left header pipe 6. In this way, the refrigerant flows in a zigzag manner in the left and right directions in the drawing in the sections of the tube 2 and the left and right header pipes 6 and is finally connected via the outlet flange of the connector 10 on the lower side of the left header pipe 6. It flows out from the refrigerant outlet piping. And the receiver main body 13 is being fixed to the right side header pipe 6 of the condenser 11 (condenser main body) comprised in this way via the connection member 12, and it is the 2nd from the top of the right side header pipe 6. After the refrigerant from the second compartment is introduced into the receiver body 13, it flows out into the third compartment.

  FIG. 2 shows the right header pipe 6 and the liquid receiver 13 (liquid receiver body) of the liquid receiver-integrated condenser 1 of FIG. 1, and FIG. FIG. 3B is an enlarged longitudinal sectional view of the vicinity of the lower opening end as viewed along line III, and FIG. 3B is a transverse sectional view of FIG. The liquid receiver main body 13 has a cylindrical shape on the inner surface, and the outer surface has an irregular shape in cross section made of an extruded material having a convex portion 14 protruding toward the header pipe 6 side. The header pipe 6 and the liquid receiver body 13 are joined via the connecting member 12, and a circular refrigerant inlet 15 and a refrigerant outlet 16 are formed so as to penetrate the joint, and the header pipe 6 and the receiver pipe 13 are received. The fluid main body 13 communicates with the inside.

  In the vicinity of the lower opening end 17 of the liquid receiver body 13, grooves 20 and 21 extending in an endless state in the circumferential direction for fitting the C rings 18 and 19 are formed in two axial directions on the inner surface of the liquid receiver body 13. Has been. In this embodiment, a cap 22 having a filter is fixed between the C-rings 18 and 19 fitted in the two grooves 20 and 21. An O-ring 23 is interposed between the outer peripheral surface of the cap 22 and the inner peripheral surface of the liquid receiver main body 13, and seals this space. It is preferable that the inner surface of the receiver body of the seal portion where the two groove portions 20 and 21 and the O-ring 23 between them are in contact are processed at the same time.

  4 to 8 show parts constituting the receiver-integrated condenser shown in FIGS. 2 and 3. Coin-shaped caps 24 and 25 for closing these containers are joined to the upper and lower ends of the header pipe 6 and the upper end of the liquid receiver 13, respectively. These parts can also be joined by brazing them together in a furnace after assembling all the parts. After the integral brazing, a desiccant (not shown) packed in a bag is inserted into the receiver body 13 from below, the C-ring 19 is fitted into the groove 21 on the upper side, and then a cap 22 equipped with a filter. After insertion, the C-ring 18 is fitted into the groove 20 on the lower side. In this way, the cap 22 provided with the filter is fixed at a predetermined position inside the receiver body 13. An O-ring 23 is preferably fitted in advance on the outer peripheral surface of the cap 22 provided with a filter.

  FIG. 8 is a view showing a cap 22 having a filter that constitutes the receiver-integrated condenser of FIG. 3, and a groove portion 32 for fitting an O-ring 23 is formed on the outer surface of the cap body 31. Is formed. The cap 22 is preferably produced by integrally molding the cap body 31 and the filter 33 with resin, but the cap body 31 and the filter 33 produced as separate parts may be used in combination.

  In the above embodiment having such a configuration, the cap 22 provided with the filter is inserted into the lower opening of the receiver body 13 from below and locked to the C ring 19 fitted in the groove 21. Thereafter, the C-ring 18 is inserted from below and fitted into the groove 20 to be fixed at a predetermined position. At this time, since the O-ring 23 is attached to the cap 22 in advance, the O-ring 23 is also automatically determined at a predetermined position, and the seal between the cap 22 and the inner peripheral surface of the receiver body 13 is ensured. The airtightness inside the liquid receiver body 13 is ensured. Since the inner surface processing for sealing the grooves 20 and 21 and the O-ring 23 is performed integrally, all these roundness and dimensional accuracy are ensured, and the desired airtightness and cap mountability are easy. Secured. Further, since complicated processing is not required, there is substantially no increase in cost.

  9 is an enlarged view of the vicinity of the lower opening end of the receiver body in the receiver integrated condenser according to another embodiment of the present invention, and FIG. 10 is the receiver integrated condenser of FIG. It is the figure which showed the cap which comprises a container. Four claw portions 42 are provided on the upper surface side of the cap 41 provided with a filter, and the cap 41 is fitted into the upper groove portion 43 so that the cap 41 is positioned at a predetermined position inside the receiver body 13. Fixed to. Since other configurations are substantially the same as those of the above-described embodiment, the same reference numerals as those of the above-described embodiment are used and description thereof is omitted. In the present embodiment, the upper groove portion 43 does not have to be endless, and may be a groove portion that can fit at least the claw portion 42, for example, a groove portion that is intermittently formed in the circumferential direction. Further, if the groove width (width in the longitudinal direction of the liquid receiver) of the lower groove portion 20 is smaller than the groove width of the upper groove portion 43, the claw portion 42 smoothly moves the lower groove portion 20 when the cap is inserted. It is preferable because it can be overcome.

  The present invention can be applied to any liquid receiver-integrated condenser in which the liquid receiver is provided integrally with the condenser, and is particularly suitable for a condenser used in a vehicle air conditioner.

It is a perspective view which shows the receiver integrated condenser which concerns on one embodiment of this invention. The header pipe and receiver part of the receiver integrated condenser of Drawing 1 are shown, (A) is a perspective view, (B) is a side view, (C) is a tube side front view, (D) is A rear view and (E) are cross-sectional views. It is a figure which shows the lower opening edge vicinity of the part shown in FIG. 2, (A) is an expanded longitudinal cross-sectional view, (B) is a cross-sectional view. It is a partial exploded perspective view of the receiver integrated condenser of FIG. It is a figure which shows the liquid receiver main body of FIG. 4, (A) is a front view, (B) is a side view. It is a figure which shows C ring of FIG. 4, (A) is a top view, (B) is a perspective view. It is a figure which shows the connection member of FIG. 4, (A) is a front view, (B) is a perspective view. It is a figure which shows the cap provided with the filter of FIG. 4, (A) is a side view, (B) is a perspective view. It is a figure which shows the lower opening end vicinity and header pipe lower part of the receiver main body of the receiver integrated condenser which concerns on other embodiment of this invention, (A) is an enlarged longitudinal cross-sectional view, (B) is a receiver. It is a partial longitudinal cross-sectional view of only a liquid body. It is a figure which shows the cap provided with the filter of FIG. 9, (A) is a perspective view, (B) is a side view, (C) is a top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid receiver integrated condenser 2 Tube 3 Fin 4 Core 5 End plate 6 Header pipe 7 Partition plate 8, 10 Connector 11 Condenser 12 Connection member 13 Liquid receiver main body 14 Convex part 15 Refrigerant inlet 16 Refrigerant outlet 17 Lower opening end 18, 19 C ring 20, 21, 32, 43 Groove part 22, 41 Cap 23 with filter O ring 24, 25 Cap 31 Cap body 33 Filter 42 Claw part

Claims (11)

  In the receiver integrated condenser in which the receiver is provided integrally with the condenser, a groove extending in the circumferential direction at two axial positions on the inner surface of the receiver body near the lower opening end of the receiver body A cap with a filter is fixed between at least one of the groove portions and a C-ring is fixed between the groove portions, and an O between the outer peripheral surface of the cap and the inner surface of the receiver body. A receiver-integrated condenser, wherein a ring is interposed.   The C-ring is fitted into one of the grooves located near the lower opening end, and a claw provided on the upper surface side of the cap is fitted into the other groove. Liquid receiver integrated condenser.   The receiver-integrated condenser according to claim 2, wherein a groove width of the one groove portion is smaller than a groove width of the other groove portion.   The receiver-integrated condenser according to any one of claims 1 to 3, wherein the seal portion with which the O-ring comes into contact is cut simultaneously with the groove portion.   The receiver-integrated condenser according to any one of claims 1 to 4, wherein the O-ring is fitted in advance on the outer peripheral surface of the cap.   The receiver integrated condenser according to any one of claims 1 to 5, wherein a cross-sectional shape of the inner surface of the receiver body with respect to the axial direction is constant in a region sandwiched between one groove and the other groove. vessel.   The receiver integrated body according to any one of claims 1 to 6, wherein a cross-sectional shape of the outer surface of the receiver body with respect to the axial direction is formed into a shape having a convex portion protruding toward the header pipe side of the condenser. Condenser.   The receiver integrated condenser according to claim 7, wherein the receiver main body and the header pipe of the condenser are fixed to each other via a connecting member.   The receiver-integrated condenser according to claim 8, wherein the connecting member is formed to be shorter than the receiver body.   The connecting member is fitted in at least one of a communication hole with the header pipe of the condenser formed in the receiver body and a communication hole with the receiver body formed in the header pipe of the condenser. The receiver integrated condenser according to claim 8 or 9, wherein a fitting portion is formed. The liquid receiver integrated condenser according to any one of claims 1 to 10, which is used in a vehicle air conditioner.

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