JP2018017426A - Cap and pressure container for refrigeration cycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap for a pressure container for refrigeration cycle that has enhanced external visibility, and to provide a pressure container for refrigeration cycle including the cap.SOLUTION: There is provided a cap attached to a pressure container for refrigeration cycle including: a pressure container body; a header; and a refrigerant inflow part and a refrigerant outflow part which protrude from the header. The cap includes a plate part and a side peripheral part. The plate part and the side peripheral part are formed of a transparent member through which at least the refrigerant inflow part and the refrigerant outflow part are visible from outside.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cap used in a refrigeration cycle pressure vessel and a refrigeration cycle pressure vessel equipped with a cap.

  In a refrigeration cycle, a pressure vessel for a refrigeration cycle such as a receiver or an accumulator for separating gas and liquid is used. If it is a receiver, the refrigerant | coolant condensed with the condenser will be flowed in in a container, a gas-liquid will be isolate | separated, and only a liquid refrigerant will flow out toward an expansion valve. Moreover, if it is an accumulator, the refrigerant | coolant from an evaporator will flow in in a container, a gas-liquid will be isolate | separated, and a gas refrigerant will be flowed out toward a compressor. At this time, since the internal pressure of the receiver and the accumulator is used higher than the atmospheric pressure, it functions as a pressure vessel.

  The pressure vessel for the refrigeration cycle has a refrigerant inflow portion for allowing the refrigerant to flow in and a refrigerant outflow portion for allowing the refrigerant to flow out. And the structure in which a refrigerant | coolant inflow part and a refrigerant | coolant outflow part protrude from an edge part and are arrange | positioned is disclosed (for example, refer patent document 1).

JP2014-202440

  Since the inside of the pressure vessel for the refrigeration cycle is at a high pressure, any damage to the refrigerant inflow portion and the refrigerant outflow portion protruding from the end of the vessel may lead to refrigerant leakage. Moreover, the sealing member for improving the sealing performance at the time of joining to another member is attached to the refrigerant inflow portion and the refrigerant outflow portion. This missing seal member also leads to refrigerant leakage.

  On the other hand, a desiccant is put inside the pressure vessel for the refrigeration cycle, and it is necessary to attach a cap for closing the refrigerant inflow portion and the refrigerant outflow portion in order to seal the pressure vessel at the time of shipment. Further, by attaching the cap, it is possible to protect the protruding refrigerant inflow portion and refrigerant outflow portion.

  However, in the state where the cap is attached to the pressure vessel, it cannot be confirmed whether or not the refrigerant inflow portion and the refrigerant outflow portion protruding from the end portion of the vessel are damaged or extremely difficult. There is a possibility of scratching when moving in the factory or during product inspection before shipment (that is, before mounting the cap), and it is desirable to check the presence or absence of the scratch even with the cap attached. In addition, it is desirable to confirm the mounting of the seal member even when the cap is attached.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a refrigeration cycle pressure vessel cap with improved external visibility and a refrigeration cycle pressure vessel equipped with the cap.

  In order to solve the above problems, one of the representative caps of the present invention is a refrigeration cycle pressure vessel having a pressure vessel body, a header, and a refrigerant inflow portion and a refrigerant outflow portion protruding from the header. A cap to be mounted, wherein the cap includes a plate portion and a side peripheral portion, and the plate portion and the side peripheral portion are formed of a transparent member that allows at least the refrigerant inflow portion and the refrigerant outflow portion to be visually recognized from the outside. Has been.

  In one embodiment of the cap according to the present invention, an uneven portion may be provided outside the side peripheral portion. Moreover, the corner | angular inside the edge part on the opposite side to the said board part of the said side periphery part may be a rounding part.

  One of the typical pressure vessels for a refrigeration cycle of the present invention includes a pressure vessel main body, a header, a refrigerant inflow portion and a refrigerant outflow portion protruding from the header, and the cap is attached thereto.

  The cap of the refrigeration cycle pressure vessel according to the present invention can visually recognize the refrigerant inflow portion and the refrigerant outflow portion of the refrigeration cycle pressure vessel from the outside. Moreover, the pressure vessel for the refrigeration cycle according to the present invention can visually recognize the refrigerant inflow portion and the refrigerant outflow portion from the outside with the cap attached.

It is a side view which shows 1st Example of the cap by this invention. It is a top view which shows 1st Example of the cap by this invention. It is the side view and sectional drawing which show an example of the pressure vessel for refrigeration cycles before mounting | wearing with a cap. It is the side view to which the header member vicinity of FIG. 3 was expanded. It is the side view and sectional drawing which show an example of the pressure vessel for refrigeration cycles of the state equipped with the cap of 1st Example. It is the side view to which the cap vicinity of FIG. 5 was expanded. It is the side view and sectional drawing which show 2nd Example of the cap by this invention.

<First embodiment>
FIG. 1 is a side view showing a first embodiment of a cap according to the present invention. FIG. 2 is a top view showing a first embodiment of a cap according to the present invention.

  The cap 10 includes a plate portion 11 and a side peripheral portion 12, and further has an uneven portion 13 on the outer surface of the side peripheral portion 12.

  The plate part 11 is formed of a disk-shaped member having a constant thickness. An inner surface 11a of the plate portion 11 is formed flat and can block a refrigerant inflow portion 65 and a refrigerant outflow portion 66 described later.

  The side periphery 12 is formed of a cylindrical member having a constant thickness. The lower part of the inner surface 12a of the side peripheral part 12 has a shape that matches the outer periphery of the outer peripheral surface upper part 611 so that it can be inserted into the outer peripheral surface upper part 611 described later.

  The plate portion 11 is formed on the upper side of the cylinder of the side peripheral portion 12 and is formed so as to block one side of the side peripheral portion 12. On the other hand, the lower side of the side periphery 12 is open. For this reason, the cap 10 is a cylindrical member which is closed on the plate part 11 side and opened on the opposite side of the plate part 11. Here, the corner | angular part 15 to which the board part 11 and the side periphery 12 are connected may be connected by the curved surface.

  The plate portion 11 and the side peripheral portion 12 are formed of a transparent or colorless transparent member so that the state of the refrigerant inflow portion 65 and the refrigerant outflow portion 66, which will be described later, and the presence or absence of the seal member 80 can be visually recognized from the outside. ing. For example, the entire cap 10 can be made transparent by molding with an ABS resin. The degree of transparency is such that the presence / absence of the seal member 80 can be confirmed, and furthermore, the presence / absence of scratches or dirt on the refrigerant inflow portion 65 and the refrigerant outflow portion 66 can be confirmed.

  The uneven portion 13 is formed as a knurled uneven portion on the outer side 12 b of the side peripheral portion 12. The range of the concavo-convex portion 13 is set so as not to hinder the visibility of the refrigerant inflow portion 65 and the refrigerant outflow portion 66.

  FIG. 3 is a side view and a cross-sectional view showing an example of a pressure vessel for a refrigeration cycle before the cap is attached. FIG. 4 is an enlarged side view of the vicinity of the header member of FIG.

  The refrigeration cycle pressure vessel 50 is formed by joining a header member 60 and a pressure vessel body 70 together. The refrigeration cycle pressure vessel 50 is a receiver or an accumulator, and a configuration in accordance with the purpose can be appropriately adopted for the inside 73. As the material of the header member 60 and the pressure vessel main body 70, for example, an aluminum alloy can be applied.

  The pressure vessel main body 70 includes a cylindrical portion 71 and a bottom portion 72. The cylindrical portion 71 is cylindrical, and the lower end thereof is a bottom portion 72. The upper end of the cylindrical part 71 that is opposite to the bottom part 72 is open.

  The header member 60 includes a header 61, a header attachment portion 62, a refrigerant inflow portion 65, and a refrigerant outflow portion 66. The header 61 is a columnar member, and the outer diameter thereof is substantially the same as the outer diameter of the cylindrical portion 71 of the pressure vessel main body 70. A columnar header mounting portion 62 having a smaller outer diameter than the header 61 is provided below the header 61, and a step portion 61 b is provided between the header 61 and the header mounting portion 62. The outer diameter of the header mounting portion 62 is a size that matches the inner diameter of the cylindrical portion 71 so as to fit within the cylindrical portion 71 of the pressure vessel main body 70. Further, at the upper end of the header 61, a refrigerant inflow portion 65 into which refrigerant flows in and a refrigerant outflow portion 66 from which refrigerant flows out are juxtaposed in the same direction. These heights are the same.

  The refrigerant inflow portion 65 includes a root portion 65b extending upward from the header 61 and a tip portion 65a extending upward from the root portion 65b and having a smaller outer diameter than the root portion 65b. Since the outer diameter is different between the root portion 65b and the tip portion 65a, a step portion is formed on the outer periphery. Further, the refrigerant inflow portion 65 is provided with a refrigerant inflow hole 65c. For this reason, the refrigerant inflow portion 65 has a pipe shape having a stepped portion on the outside. The refrigerant inflow hole 65c also penetrates the header 61 and the header attachment portion 62.

  The refrigerant outflow portion 66 includes a root portion 66b extending upward from the header 61 and a tip portion 66a extending upward from the root portion 66b and having a smaller outer diameter than the root portion 66b. Since the outer diameter is different between the root portion 66b and the tip portion 66a, a step portion is formed on the outer periphery. Further, in the refrigerant inflow portion 65, similarly to the refrigerant inflow hole 65 c of the refrigerant inflow portion 65, a refrigerant outflow hole (not shown) is provided. For this reason, the refrigerant outflow portion 66 also has a pipe shape with a stepped portion on the outside.

  To join the header member 60 and the pressure vessel main body 70, first, the header attachment portion 62 of the header member 60 is inserted into the cylinder portion 71 of the pressure vessel main body 70 from the upper opening side of the cylinder portion 71. Then, since the lower step portion 61b of the header 61 and the upper end of the cylindrical portion 71 are in contact with each other, welding 75 is performed from the outer peripheral side to the entire periphery at this portion. By this welding, the upper end part of the outer periphery of the cylinder part 71 and the lower part of the outer peripheral surface 61a of the header 61 are melted and joined.

  In this state, the outer peripheral surface 61 a of the header 61 is an outer peripheral surface upper portion 611 that is not melted by the weld 75 on the upper side, and a lower outer peripheral surface 612 that is melted by the weld 75 on the lower side. Here, the outer peripheral surface upper part 611 without melting remains the outer peripheral surface of the cylinder.

  Seal members 80 are attached to the refrigerant inflow portion 65 and the refrigerant outflow portion 66, respectively. The seal member 80 is a ring member such as an O-ring, and is disposed in the vicinity of the step formed on the top of the base portions 65b and 66b on the outer periphery of the tip portions 65a and 66a.

  FIGS. 5A and 5B are a side view and a cross-sectional view showing an example of a pressure vessel for a refrigeration cycle in a state where the cap of the first embodiment is mounted. FIG. 6 is an enlarged side view of the vicinity of the cap of FIG.

  In FIG. 5, the desiccant 90 stored in the bag 91 is disposed in the inside 73 of the refrigeration cycle pressure vessel 50. The desiccant 90 is configured in a granular form such as silica gel, for example, and is used for removing moisture in the refrigerant according to the use of the pressure vessel for the refrigeration cycle. As the bag 91, for example, a felt-like cloth bag in which heat is applied to the edge portion of the cloth and welded can be applied.

  The cap 10 is attached to the header member 60 of the refrigeration cycle pressure vessel 50. First, with the opening side of the cap 10 facing down, the lower portion of the inner surface 12 a of the side peripheral portion 12 of the cap 10 is inserted so as to fit into the upper outer peripheral surface 611 of the header 61. Then, the inner surface 11 a (lower surface side) of the plate portion 11 of the cap 10 abuts on the upper side surface of the front end portion 65 a of the refrigerant inflow portion 65 and the upper side surface of the front end portion 66 a of the refrigerant outflow portion 66. Thereby, mounting | wearing to the pressure vessel 50 for refrigeration cycles of the cap 10 is completed.

  At this time, the height of the cap 10 is set such that the lower end portion 12c of the cap 10 does not reach the weld 75 in a state where the cap 10 is mounted. Further, the range of the uneven portion 13 in the cap 10 is a range from the lower end portion 12c of the cap 10 to the upper end of the header 61 in a state where the cap 10 is mounted, and the refrigerant inflow portion 65, the refrigerant outflow portion 66, and the seal member 80 Visibility from the outside can be improved. Further, considering mainly the confirmation of scratches and dirt on the tip portions 65a and 66a, the range of the concavo-convex portion 13 is from the lower end portion 12c of the cap 10 to the upper part of the outer peripheral surface when viewed from the center line in FIG. 611 and the range which covers the side surface of base part 65b, 66b may be sufficient.

  In the state where the cap 10 is mounted, the plate portion 11 and the side peripheral portion 12 of the cap 10 are transparent, so that the presence or absence of scratches, dirt, etc. in the refrigerant inflow portion 65 and the refrigerant outflow portion 66 can be confirmed from the outside. As a result, even when the cap 10 is attached, it is possible to find scratches and dirt from the outside. Furthermore, even when the cap 10 is attached, the presence or absence of the seal member 80 can be confirmed from the outside, and the missing of the parts can be prevented.

  Furthermore, in the state where the cap 10 is mounted, as described above, the outside air flows into the cap 10 due to the fitting between the inner surface 12 a of the side peripheral portion 12 of the cap 10 and the outer peripheral surface upper portion 611 of the header 61. To prevent. Further, the inner surface 11a of the plate portion 11 of the cap 10 abuts on the upper side surface of the front end portion 65a of the refrigerant inflow portion 65 and the upper side surface of the front end portion 66a of the refrigerant outflow portion 66, so that the gas in the cap 10 Moisture is prevented from flowing into the inside 73 of the pressure vessel 50 for the refrigeration cycle. Accordingly, the confidentiality of the inside 73 of the pressure vessel 50 for the refrigeration cycle is maintained.

  When performing an operation of removing the cap 10 from the refrigeration cycle pressure vessel 50, the operator pulls out the refrigeration cycle pressure vessel 50 with the concavo-convex portion 13, so that the force of pulling out the cap 10 by the frictional resistance of the concavo-convex portion 13 is increased. It becomes easier to remove.

<Second embodiment>
7A and 7B are a side view and a cross-sectional view showing a second embodiment of the cap according to the present invention, the left side of the center line is a side view and the right side is a center cross-sectional view. The second embodiment has a configuration in which the corner of the lower end of the side peripheral portion 12 of the cap 10 of the first embodiment is a rounded portion 12d, and the other portions are the same as those shown in the first embodiment. The explanation of the part is omitted.

  The cap 10 'of the second embodiment includes a rounded portion 12d on the side peripheral portion 12'. The rounded portion 12d is configured by a smooth curved surface connecting the lower portion of the inner surface 12a of the side peripheral portion 12 'and the lower end portion 12c of the side peripheral portion 12'. This curved surface may have a constant curvature radius.

  With the configuration of the second embodiment, when the cap 10 ′ is attached to the refrigeration cycle pressure vessel 50, the rounded portion 12 d hits the corner 61 c (see FIG. 4) on the header 61. At this time, the cap 10 'is guided in the direction in which the inner surface 12a of the cap 10' and the outer peripheral surface upper portion 611 of the header 61 are fitted by the reaction force to the outside received by the rounded portion 12d, so that the cap 10 'can be smoothly inserted. Is possible.

  As described above, the first example and the second example have been shown for the embodiment of the present invention. However, the present invention is not limited to the above-described example, and various modifications are included. For example, the invention is not limited to the one having all the configurations (structures) provided in the above-described embodiments. It is also possible to delete a part of the configuration of a certain embodiment, replace it with the configuration of another embodiment, or add the configuration of another embodiment to the configuration of a certain embodiment.

  For example, in the above embodiment, the plate portion 11 of the cap 10 is disk-shaped and the side peripheral portion 12 is cylindrical. However, the shape is not limited to this, and the shape is adapted to the shape of the pressure vessel for the refrigeration cycle. Is possible.

  Moreover, in the said Example, although the uneven | corrugated | grooved part 13 was knurled, it does not need to be restricted to this. Any uneven shape can be applied as long as the cap is easy to remove due to the unevenness.

  Moreover, in the said Example, the visibility can be improved as a whole because the board part 11 and the side peripheral part 12 are formed in the cap 10 from the transparent or colorless and transparent member. However, if the state of the refrigerant inflow portion 65 and the refrigerant outflow portion 66 and the attachment of the seal member 80 can be confirmed in a state where the cap 10 is attached to the refrigeration cycle pressure vessel 50, the transparent range can be made a part. It is.

  Moreover, in the said 2nd Example, although it demonstrated that the cap 10 had the structure of the rounding part 12d, you may apply a chamfering part instead of the rounding part 12d.

DESCRIPTION OF SYMBOLS 10 Cap 11 Plate part 12 Side peripheral part 12d Round part 13 Uneven part 50 Pressure vessel 60 for refrigeration cycle Header member 61 Header 62 Header attachment part 65 Refrigerant inflow part 66 Refrigerant outflow part 70 Pressure vessel main body 71 Cylinder part 72 Bottom part 80 Seal member

Claims (4)

A cap attached to a pressure vessel for a refrigeration cycle having a pressure vessel main body, a header, and a refrigerant inflow portion and a refrigerant outflow portion protruding from the header,
The cap includes a plate portion and a side peripheral portion,
The said plate part and the said side peripheral part are caps of the pressure vessel for refrigeration cycles which are formed from the transparent member which can visually recognize at least the said refrigerant | coolant inflow part and the said refrigerant | coolant outflow part from the outside. It has a concavo-convex part on the outside of the side peripheral part,
The cap of the pressure vessel for refrigeration cycles according to claim 1. The inner corner of the end of the side periphery opposite to the plate portion is a rounded portion,
The cap of the pressure vessel for refrigeration cycles according to claim 1 or 2.   A pressure vessel for a refrigeration cycle, comprising a pressure vessel main body, a header, and a refrigerant inflow portion and a refrigerant outflow portion protruding from the header, wherein the cap according to any one of claims 1 to 3 is mounted.

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