JP4592031B2 - Seal cap for receiver dryer - Google Patents

Description

  The present invention relates to a sealing cap for a receiver dryer. More specifically, the cap body and a filter are separated and detachably coupled, and an O-ring is interposed between the cap body and a filter. In addition, the O-ring installation work is simple and the tool insertion groove can be formed long, which is more advantageous for assembly automation, and the overall height is reduced when the cap body and the filter are joined together. If the caps have the same size, the filter size can be increased, so the filtering effect can be improved, and the receiver dryer that prevents the cap body from loosening from the tank. The present invention relates to a sealing cap.

  In automotive cooling systems, a working fluid that exchanges heat with the outside air is compressed by a compressor into a high-temperature and high-pressure gas phase, and then sent to a capacitor. The capacitor changes the phase of the gas-phase working fluid into a liquid phase and absorbs heat. Is raised and then transferred to the expansion valve. After that, the expansion valve expands the working fluid to a low temperature / low pressure state and sends it to the evaporator, and the evaporator performs heat exchange with the outside air (absorbs the outside air heat) to the predetermined temperature. To cool the space.

However, in order for the working fluid circulating through the above path to be absorbed by the condenser in order to absorb the outside air heat, it must become a liquid phase, but a part remains in the gas phase and passes through the condenser. After that, the liquid phase and the gas phase coexist.
Therefore, when the working fluid in which the liquid phase and the gas phase coexist exchange heat with the evaporator, the gas-phase working fluid cannot absorb the heat of the outside air, so that the cooling efficiency is lowered.

In order to solve the above problems, a receiver dryer is provided between the condenser and the expansion valve. The receiver dryer separates and removes the gas-phase working fluid that has not yet been converted into a liquid phase by a condenser, or absorbs moisture contained in the circulating working fluid to increase the cooling efficiency.
Such a receiver dryer 10 is generally attached to a header tank 2 on one side of the capacitor 1 as shown in FIG.
The receiver dryer 10 contains a desiccant 15 in order to remove the gas-phase working fluid and moisture in the tank 11 whose upper part is closed and whose lower part is opened, and is included in the working fluid that has passed through the desiccant 15. A cap 20 is assembled and fixed to the lower part of the tank 11 so that the impurities can be removed, and the lower part of the tank 11 is sealed.

As shown in FIG. 2, the cap 20 has a body portion 30 and a filter portion 40 integrally formed of a metal material. The body portion 30 is formed with a threaded portion 31 on the outer peripheral surface so as to be screwed into the lower end opening 13 of the tank 11, and an O-ring 50 that keeps air-tightness in order and a lower end surface of the tank 11 are in close contact therebelow. A flange 32 is formed. Further, a tool insertion groove (not shown) for assembly is formed at the lower end.
The filter part 40 is integrally formed at the upper end of the body part 30, an inflow path 41 is provided at the upper end so that the working fluid can flow in, and a plurality of discharge paths 42 are provided at the side wall so that the working fluid can be discharged. ing. Moreover, since the filter net | network 43 is installed inside the filter part 40, the impurity contained in the working fluid can be removed.

However, since the above-described conventional cap 20 is made of metal, it has a large weight, and the material itself is expensive, resulting in high costs due to complicated processing processes.
Moreover, since the trunk | drum 30 and the filter part 40 are integrally formed, when any one function lose | disappears, all functions will lose | disappear and there existed a problem which had to replace the whole.

Further, when the O-ring 50 is installed in the groove 51 formed on the outer peripheral surface of the body portion 30, the inner diameter of the O-ring 50 is smaller than the outer shape of the body portion 30, so that the groove 51 is in a state where the O-ring 50 is expanded. It was difficult to install the O-ring 50, and thus it was difficult to automate.
Further, in order to make the cap 20 compact, it is necessary to make the filter portion 40 relatively small, and the filtering effect is lowered.

In order to solve the above problems, Korean Patent Publication No. 2001-0665605 filed earlier by the applicant of the present invention is a structure in which a metal material filter is insert injection molded, and Korean Patent Publication No. 2003-086096. Shows a structure in which a filter is injection molded and attached to a metal cap.
Japanese Patent Application Laid-Open No. 2000-292030 discloses a structure in which a filter and a cap body are divided and molded, and a convex portion and a concave portion formed on a joint surface between them are joined.
However, there is still a problem that it is difficult to install the O-ring.

FIG. 3 shows a state in which the body portion 30 of the cap 20 is coupled to the tank 11 at a low temperature (winter), an intermediate (normal temperature), and a high temperature (operation), and the fastening state changes due to a temperature change. I understand. In addition to the difference in thermal shrinkage due to temperature changes, there is a problem that the cap 20 is loosened due to vibration, insufficient fastening tension, and the like.
In particular, when the threaded portion 31 of the body portion 30 is not in close contact with the threaded portion on the tank 11 side in the intermediate (normal temperature) state and there is a gap, the fastening tension becomes the lowest state, and the loosening of the cap 20 is accelerated. was there.
Korean Patent Publication No. 2003-086096 Korean Patent Publication No. 2001-0665605 JP 2000-292030 A

  The present invention has been made to solve the conventional problems, and an object of the present invention is to detachably couple the cap body and the filter so that an O-ring can be interposed therebetween. By improving the structure, replacement of each part is easy, the O-ring installation work is simple, and the tool insertion groove can be formed long, which is more advantageous for assembly automation and the cap. When the fuselage and the filter are combined, the overall height is reduced, the size can be reduced, and when the cap is the same size, the size of the filter can be increased, so that the filtering effect is improved. By extracting the air between the cap body and the filter, it is possible to achieve a smooth connection and to prevent the cap body from loosening from the tank. To provide a sealing cap of the receiver drier to.

In order to achieve the above object, the present invention is combined with the opening (13) of the tank (11) of the receiver dryer (10) to form a fastening portion (111) on the outer peripheral surface, and a flange (112) on the lower end portion. The cap body (110) provided and the upper end of the cap body (110) are detachably coupled to each other via a coupling means (140), and an inflow path (131) and an exhaust path ( 132) is formed, and a filter (130) having a filter mesh (134) formed therearound and an O-ring mounting portion (113) with one side open to the outer periphery of the upper end of the cap body (110) are formed. The lower end of the filter (130) is provided with an O-ring holding part (137) for closing the opened side of the O-ring mounting part (113) for preventing the O-ring (120) from being detached. That the O-ring mounting means (150), wherein the said coupling means (140), the formed protrusion on the upper end of the cap body (110) to (114), wherein the lower end portion of said filter (130) An insertion groove (136) corresponding to the protrusion (114) is formed, and a thinning groove (114a) is further formed in the protrusion (114) to save material, and a lower portion of the filter (130). In order to facilitate the coupling between the projecting portion (114) and the insertion groove (136), a discharge hole (138) for drawing air from the insertion groove (136) communicates with the thinning groove (114a). It is formed in this.

  Further, the protrusion (114) and the insertion groove (136) are each formed in a non-circular shape to prevent idle rotation after the coupling, and the filter (130) is provided in the receiver dryer (10). A holding part (135) for holding the installed desiccant (15) is formed.

  A tool insertion groove (115) is formed at the lower end of the cap body (110) by assembling the cap body (110), and a plurality of O-rings are provided in the O-ring mounting portion (113). A liner (125) for tightly supporting the O-ring (120) is provided between (120).

  In order to prevent the cap body (110) from being loosened between the lower end of the tank (11) of the receiver dryer (10) and the flange (112) of the cap body (110), a locking device (118) is provided. The locking means (118) is formed with a locking groove (16) at the lower end of the tank (11), and the upper surface of the flange (112) is engaged with the locking groove (16). A locking claw (116) to be stopped is provided, and a cut groove (117) is provided on the flange (112) on one side of the locking claw (116) for the elastic action of the locking claw (116). The protrusion (114) and the insertion groove (136) are tap-coupled.

According to the present invention, the cap body and the filter are each injection-molded and detachably coupled, and the structure is improved so that an O-ring can be installed between them, so that any one of the parts functions due to damage or the like. Since it is only necessary to replace the part when it disappears, the replacement work is easy, the cost is reduced, the O-ring installation work is simple, and the tool insertion groove can be formed long, so assembly automation Is advantageous.
In addition, when the cap body and the filter are combined, the overall height can be reduced and the size can be reduced. If the caps have the same size, the size of the filter can be increased, so that the filtering effect is improved. improves.

By forming the discharge hole of the filter, the air remaining in the insertion groove escapes and can be more smoothly connected when the protrusion between the cap body and the insertion groove of the filter is connected.
Further, by installing a plurality of O-rings in the O-ring mounting portion and by installing liners between the O-rings, the supply condition of the frozen lubricating oil is improved, and the lower end of the tank and the flange of the cap body By forming the locking groove and the locking claw respectively on the cap body, it is possible to prevent the cap body from loosening after being joined.

Hereinafter, the present invention will be described in detail with reference to the drawings.
In addition, the same code | symbol is attached | subjected about the same part as the past, and the description is abbreviate | omitted.

  4 is an exploded perspective view showing a sealing cap of a receiver dryer according to the present invention, FIG. 5 is a sectional view taken along the line AA in FIG. 4, and FIG. 6 is a diagram illustrating the coupling of the sealing cap to the receiver dryer according to the present invention. FIG. 7 is a cross-sectional view showing a state where an air discharge hole is formed on the filter side in the sealing cap of the receiver dryer according to the present invention, and FIG. 8 is a diagram for sealing the receiver dryer according to the present invention. In a cap, it is an exploded perspective view showing the case where the connecting part of a cap body and a filter is formed in a non-circular shape.

The receiver dryer 10 according to the present invention has an upper part sealed by an upper cap 12, a lower part opened, and a tank 11 installed so as to communicate with the header tank 2 of the condenser 1, and a desiccant charged in the tank 11. 15 and a cap 100 that is screwed into the opening 13 of the tank 11 to seal the opening.
The desiccant 15 removes the gas-phase working fluid and moisture that have not yet been converted into a liquid phase by the condenser 1 to increase the cooling efficiency. Various filter members as well as the desiccant 15 may be used.

In addition, the cap 100 of the present invention is configured in a form in which the cap body 110 and the filter 130 are separated, and each is injection-molded with a synthetic resin, but EP (Engineering Plastic) with high mechanical strength such as nylon and acrylic. It is desirable to injection mold with.
The cap body 110 has a fastening portion 111 formed on the outer peripheral surface so as to be connectable to the opening 13 of the tank 11 of the receiver dryer 10, and a flange 112 that is in surface contact with the lower end surface of the receiver dryer 10.
Furthermore, a threaded portion 111 a is formed on the outer peripheral surface of the cap body 110 in the fastening portion 111 so that the cap body 110 can be screwed into the opening 13 of the tank 11.

A tool insertion groove 115 is formed at the center of the lower end of the cap body 110 so that the cap body 110 can be easily assembled using a fastening tool when the cap body 110 is assembled to the receiver dryer 10.
The tool insertion groove 115 is preferably formed long in the longitudinal direction inside the cap body 110 so as to be more advantageous for assembly automation. That is, the contact area between the fastening tool and the cap body 110 is increased, and the runout during assembly can be reduced, so that the assembly operation can be performed smoothly.

The filter 130 is detachably coupled to the upper end portion of the cap body 110 via a coupling means 140, and an inflow passage 131 is formed at the upper end so that a working fluid can flow in. 133 are formed at regular intervals, and a number of discharge paths 132 are formed so that the working fluid flowing in through the inflow paths 131 can be discharged.
Further, a filter net 132 is formed around the filter 130 in which the discharge path 132 is formed so that impurities contained in the working fluid passing through the discharge path 132 can be removed.

The filter mesh 134 is preferably injection-molded integrally when the filter 130 is injection-molded. However, the filter mesh 134 may be composed of another metal mesh and double-injected together with the filter 130.
In addition, a holding part 135 is formed inside the filter 130 so as to keep the desiccant 15 and the like charged in the receiver dryer 10. At this time, it is desirable that the front end portion of the holding portion 135 protrudes from the upper end of the filter 130.

That is, when the desiccant 15 enters the inside of the filter 130 due to gravity or the like, the working fluid is prevented from flowing. However, the holding unit 135 holds the desiccant 15 to solve such a problem. Can do.
The coupling unit 140 forms a protrusion 114 at the upper end of the cap body 110 and includes an insertion groove 136 corresponding to the protrusion 114 at the lower end of the filter 130.
Therefore, when the protruding portion 114 of the cap body 110 is detachably inserted and coupled to the insertion groove 136 of the filter 130, when any one of them loses its function due to damage or the like, only the relevant part needs to be replaced. Since the replacement is easy, the cost can be reduced.

The protrusion 114 has a step with an O-ring mounting portion 113 described later.
In addition, a large number of thinning grooves 114a are formed in the projecting portion 114 in the back direction so as to save weight, material, and the like.
The filter 130 is formed with a discharge hole 138 for extracting air from the insertion groove 136 so that the protrusion 114 and the insertion groove 136 are smoothly connected to each other.
That is, in order to connect the cap body 110 and the filter 130, the protrusion 114 of the cap body 110 and the insertion groove 136 of the filter 130 are combined. In this case, the protrusion 114 is inserted into the insertion groove 136. In the process, air that remains in the insertion groove 136 and interferes with the connection is removed through the discharge hole 138 formed on the upper side of the insertion groove 136 so that the connection can be smoothly performed.

Furthermore, the protrusion 114 of the cap body 110 and the insertion groove 136 of the filter 130 are preferably formed in a non-circular shape such as a polygon or an ellipse in order to prevent idle rotation after the coupling.
Here, when the protrusion 114 of the cap body 110 and the insertion groove 136 of the filter 130 are formed in a circular shape, it is desirable that they are fitted or tapped with each other. In this case, the protrusion 114 and the insertion groove 136 may be deleted.

Meanwhile, as described above, the tool insertion groove 115 formed at the lower end of the cap body 110 can be formed longer by the coupling structure in which the protrusion 114 of the cap body 110 is inserted into the insertion groove 136 of the filter 130. Therefore, it is advantageous for assembly automation.
Further, an O-ring installation means 150 is provided between the cap body 110 and the filter so that an O-ring 120 for keeping the receiver dryer 10 and the cap airtight can be installed.

The O-ring installation means 150 forms an O-ring mounting portion 113 that is open on one side around the upper end of the cap body 110, and the O-ring 120 mounted on the O-ring mounting portion 113 is attached to the lower end of the filter 130. An O-ring holding portion 137 is provided to close the opened one side of the O-ring mounting portion 113 so as to support and prevent the O-ring 120 from being detached.
Here, since the O-ring mounting portion 113 is opened in the axial direction and is substantially the same as the inner diameter of the O-ring 120, insertion of the O-ring 120 into the O-ring mounting portion 113 is extremely simple and advantageous for automation. is there. Thus, after the O-ring 120 is mounted on the O-ring mounting portion 113, the filter 130 is coupled to prevent the O-ring holding portion 137 of the filter 130 from being detached while supporting the O-ring 120.

Therefore, when the cap body 110 and the filter 130 are coupled, the overall height of the cap 110 can be reduced, and thus a compact cap 100 can be formed.
That is, conventionally, the groove 51 is formed to a certain depth so that the O-ring 50 can be attached to the body portion 30. At this time, both the upper and lower sides of the groove 51 are disposed to prevent the O-ring 50 from being detached. Since it has to be closed, the height of the body part 30 is increased correspondingly, and the overall height of the cap 20 is increased.

Moreover, conventionally, when the groove 51 in which the O-ring 50 is mounted is injection-molded, there is a high possibility that a burr will be generated on the injection boundary surface. That is, in order to form the circular groove 51 in the body portion 30 of the cap 20, a pair of injection molds separated on both sides is required, and at this time, burrs are generated at the boundary surface where the pair of injection molds contact. easy.
Thus, if burrs are formed in the groove 51 in which the O-ring 50 is mounted, there is a risk of refrigerant leakage between the O-ring 50 and the body portion 30 of the cap 20.

However, the present invention has a structure in which the upper part of the O-ring mounting part 113 is formed open, and the height of the cap body 110 can be reduced only by this opened part. When the filter 130 is coupled, the entire height of the cap 100 can be reduced by preventing the O-ring 120 from being detached while being blocked by the O-ring holding portion 137.
On the other hand, when the dimensions of the cap 100 are kept the same, the cap body 110 can be relatively reduced as described above, so that the size of the filter 130 can be increased by that amount. The effect can be further improved.
Moreover, since it is possible to prevent burrs from being generated in the O-ring mounting portion 113 during the injection molding of the cap body 110, the risk of refrigerant leakage can be reduced.

As described above, the sealing cap 100 of the receiver dryer 10 according to the present invention is formed by injecting the cap body 110 and the filter 130 into the O-ring mounting portion 113 formed on the upper end of the cap body 110 after injection molding. The assembly of the cap 100 is completed by inserting the O-ring 120 and then coupling the filter 130 with the cap body 110.
The cap 100 thus assembled seals the opening 13 of the tank 11 by screwing into the lower end opening 13 of the tank 11 of the receiver dryer 10.

  FIG. 9 is a combined sectional view showing a sealing cap of a receiver dryer according to another embodiment of the present invention. In the above example, one O-ring 120 is installed in the O-ring mounting portion 113. In this case, refrigeration lubrication is performed. Oil supply conditions may deteriorate. In order to improve this, a plurality of (two are installed in the drawing) O-rings 120 are installed in the O-ring mounting part 113, and the O-rings 120 are stably held in close contact with each other. A flat liner 125 is provided so as to improve the sealing performance.

FIG. 10 is a perspective view showing a sealing cap of a receiver dryer according to another embodiment of the present invention, and the difference in thermal shrinkage due to temperature change when the cap body 110 is fastened to the tank 11 of the receiver dryer 10. The phenomenon that the fastening force deteriorates and loosens due to vibration, lack of fastening tension, and the like occurs. Therefore, in the present invention, the locking means 118 is provided between the lower end of the tank 11 and the flange 112 of the cap body 110 so as to prevent the cap body 110 from being loosened after being joined.
The locking means 118 is formed with a locking groove 16 at the lower end of the tank 11, and a locking claw 116 is formed on the upper surface of the flange 112 so as to be locked with the locking groove 16.
Further, due to the elastic action of the locking claw 116, a cut groove 117 is formed on the flange 112 on one side of the locking claw 116 so that the locking claw 116 can be fixed smoothly.

  As described above, in the present invention, only the method of forming the screw part 111a on the outer peripheral surface of the cap body 110 and screwing the cap body 110 to the opening 13 of the tank 11 of the receiver dryer 10 has been described. Without being limited thereto, the cap body 110 may be coupled to the opening 13 of the tank 11 using a snap ring or a pin in addition to the screwing method.

It is sectional drawing which shows the integrated capacitor | condenser of the conventional receiver dryer. It is sectional drawing which shows the state by which the cap was couple | bonded with the conventional receiver dryer. It is a figure which shows the fastening cross section changed with the temperature change in the state in which the cap was couple | bonded with the conventional receiver dryer. It is a disassembled perspective view which shows the sealing cap of the receiver dryer by this invention. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4. It is sectional drawing which shows the state by which the sealing cap was couple | bonded with the receiver dryer by this invention. It is sectional drawing which shows the case where the air discharge hole is formed in the filter side in the sealing cap of the receiver dryer by this invention. In the sealing cap of the receiver dryer according to the present invention, it is an exploded perspective view showing a case where the coupling portion between the cap body and the filter is formed in a non-circular shape. FIG. 6 is a cross-sectional view illustrating a sealing cap of a receiver dryer according to another embodiment of the present invention. FIG. 6 is a perspective view showing a sealing cap of a receiver dryer according to another embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Capacitor 2 Header tank 10 Receiver dryer 11 Tank 12 Upper cap 13 Opening part 15 Desiccant 16 Locking groove 100 Cap 110 Cap body 111 Fastening part 111a Screw part 112 Flange 113 O-ring mounting part 114 Projection part 114a Thinning groove 115 Tool insertion Groove 116 Locking claw 117 Cut groove 118 Loosening prevention means 120 O-ring 125 Liner 130 Filter 131 Inflow path 132 Discharge path 133 Holding base 134 Filter net 135 Holding part 136 Insertion groove 137 O-ring holding part 138 Discharge hole 140 Coupling means 150 O Ring mounting means

Claims (9)

A cap body (110) which is coupled to the opening (13) of the tank (11) of the receiver dryer (10), a fastening portion (111) is formed on the outer peripheral surface, and a flange (112) is provided at the lower end;
The cap body (110) is detachably coupled to the upper end of the cap body (110) through a coupling means (140), and an inflow path (131) and a discharge path (132) are formed to allow the working fluid to pass therethrough. A filter (130) formed with (134);
An O-ring mounting part (113) having one open side is formed on the outer periphery of the upper end of the cap body (110), and the O-ring (120) is prevented from being detached at the lower end of the filter (130). O-ring mounting means (150) comprising an O-ring holding part (137) for closing one open side of the O-ring mounting part (113),
The coupling means (140) has a protrusion (114) at the upper end of the cap body (110), and an insertion groove (136) corresponding to the protrusion (114) at the lower end of the filter (130). Formed
A thinning groove (114a) is further formed in the protrusion (114) to save material, and the protrusion (114) and the insertion groove (136) are coupled to the lower part of the filter (130). A sealing cap for a receiver dryer, wherein a discharge hole (138) for extracting air from the insertion groove (136) is formed to communicate with the thinning groove (114a) for smoothness . The receiver drier sealing cap according to claim 1 , wherein the protrusion (114) and the insertion groove (136) are each formed in a non-circular shape to prevent idle rotation after the coupling. The receiver according to claim 1, wherein a holding part (135) for holding a desiccant (15) installed in the receiver dryer (10) is formed in the filter (130). Cap for sealing the dryer. The receiver drier sealing cap according to claim 1, wherein a tool insertion groove (115) is formed at a lower end of the cap body (110) by assembling the cap body (110). The O-ring mounting portion (113) is provided with a plurality of O-rings, and a liner (125) for tightly supporting the O-ring (120) is provided between the O-rings (120). The cap for sealing the receiver dryer according to claim 1. To prevent the cap body (110) from being loosened between the lower end of the tank (11) of the receiver dryer (10) and the flange (112) of the cap body (110), the locking means (118 The sealing cap of the receiver dryer according to claim 1, wherein: Engaging said loosening prevention means (118) has a lower end to form a locking groove (16) of said tank (11), on the upper surface of the flange (112) which is engaged with the locking groove (16) The cap for sealing a receiver dryer according to claim 6 , further comprising a pawl (116). Claim 7, characterized in that notches (117) for the resilient action of the locking pawl (116) on the flange (112) of one side of the locking claw (116) is formed Cap for sealing the receiver dryer as described in 1. The sealing cap of the receiver dryer according to claim 1 , wherein the protrusion (114) and the insertion groove (136) are tapped.

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