JP2015158177A - Pipe sealing device of compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe sealing device preventing damage of a sealing member and excellent in removability.SOLUTION: A pipe sealing device has a sealing member 107 sealing the opening end of a pipe 108, and the sealing member 107 comprises a material having a large thermal shrinkage rate. Consequently, since the sealing member 107 is fitted to the pipe opening end and heated to thereby cause thermal shrinkage, adhere to the pipe opening end and seal it, the sealing member is, for example, just loosely fitted to the pipe opening end, and thereby the sealing member is mounted easily and can be prevented from being damaged.

Description

  The present invention relates to a sealing device for sealing a pipe of a compressor used in a cooling system such as a refrigerator or a freezer.

  Conventionally, as a sealing member which is a pipe sealing device of a compressor, a rubber member is often used (see, for example, Patent Document 1).

  Hereinafter, the pipe sealing device in the conventional compressor will be described with reference to the drawings.

  5 is a longitudinal sectional view of a compressor using a conventional pipe sealing device described in Patent Document 1, FIG. 6 is a sectional view of a main part of the conventional sealing device, and FIG. 7 is an insertion of the conventional sealing device. It is a front view of a jig.

  As shown in FIG. 5, the compressor 1 includes a compression element 3 housed in a hermetic container 2, a refrigerant discharge pipe 4, a refrigerant suction pipe 5, a refrigerant replenishment pipe (not shown; ), And the refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment pipe are each fitted with a sealing member 6 as a sealing device.

  The sealing member 6 is formed of a rubber material and covers and seals the inner and outer diameters of the refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment pipe. The refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment An insertion portion 7 to be inserted into the pipe, a blind hole 8 provided at the center of the insertion portion 7, and a truncated cone-shaped tip portion 10 which is the tip of the insertion portion 7 are provided.

  Next, the manufacturing process of the compressor will be described.

  The compressor 1 houses the compression element 3 in the sealed container 2 and paints it, and then deaerates, heats, and dries the inside of the compressor 1. Thereafter, nitrogen, dry air, or the like is sealed, and sealing members 6 are fitted and sealed in the refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment pipe, respectively.

  When the sealing member 6 is fitted, a metal elongated insertion jig 9 shown in FIG. 7 is inserted into the blind hole 8 of the sealing member 6, and the refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment pipe are inserted. The sealing member 6 can be inserted into and mounted on the refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment pipe.

  Since each of the refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment pipe is sealed, it is possible to prevent air and moisture in the atmosphere from entering the compressor 1. The generation of rust can be prevented, and the compressor 1 can be stored for a long time.

Japanese Patent Laid-Open No. 07-139468

However, in the conventional configuration, when the sealing member 6 is inserted, the axis of the sealing member 6 is displaced from the axis of the refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment pipe. If the middle of the inclined surface is caught by the end faces of the refrigerant discharge pipe 4, the refrigerant suction pipe 5, and the refrigerant replenishment pipe, the tip end portion 10 of the insertion portion 7 is buckled and the tip end portion 10 is brought into contact with the insertion portion 7 when it is pushed in without being noticed. It is inserted by the insertion jig 9 while being caught. As a result, the thickness of the portion pushed by the insertion jig 9 becomes thin, and the insertion jig 9 may break through the thin portion.

  Moreover, when using it for cooling systems, such as a refrigerator and a freezer, although it is necessary to remove the sealing member 6, since it seals with the frictional force by the elasticity of rubber | gum, in order to remove, the force beyond it Workability was poor.

  The present invention solves the above-described conventional problems, and in particular, an object of the present invention is to provide a pipe sealing device that prevents the sealing member from being damaged.

  In order to solve the above-described conventional problems, the pipe sealing device of the present invention is configured such that the sealing member for sealing the open end of the pipe fixed to the hermetic container is made of a material having a high thermal contraction rate.

  As a result, if the sealing member is fitted to the pipe opening end and heated, the heat shrinks and attaches to the pipe opening end to seal it. At the same time, the sealing member can be prevented from being damaged.

  The pipe sealing device of the present invention can be a pipe sealing device that can be easily mounted without damaging the sealing member.

Horizontal sectional view of a compressor using the pipe sealing device in Embodiment 1 of the present invention The perspective view of the pipe in Embodiment 1 The perspective view of the pipe which mounted | wore with the sealing member in Embodiment 1 The perspective view of the pipe equipped with the sealing member in the second embodiment Longitudinal sectional view of a compressor using a conventional pipe sealing device Cross section of the main part of a conventional pipe sealing device Front view of a conventional pipe sealing device insertion jig

  1st invention has the sealing member which seals the pipe fixed to the airtight container, and the opening end of the said pipe, The said sealing member is set as the structure which consists of a material with a large thermal contraction rate.

  As a result, if the sealing member is fitted to the pipe opening end and heated, the heat shrinks and attaches to the pipe opening end to seal it. At the same time, the sealing member can be prevented from being damaged.

  In a second aspect based on the first aspect, the sealing member comprises a cylindrical heat shrinkable tube.

  As a result, if the heat shrinkable tube is fitted to the pipe open end and heated, the heat shrinks and attaches to the pipe open end to seal it. Therefore, the sealing member made of the heat shrinkable tube is loosely fitted to the pipe open end. As a result, it is easy to mount, and since it is loosely fitted and heat-sealed, there is an effect that the sealing member can be prevented from being damaged without causing a force to damage the sealing member.

In a third aspect based on the first aspect, the sealing member comprises a heat shrink cap whose one end is sealed.

  As a result, if the heat shrink cap is fitted to the pipe opening end and heated, the heat shrinks and attaches to the pipe opening end to seal it. Therefore, the sealing member comprising the heat shrink cap is loosely fitted to the pipe opening end. It is easy to mount, and since it is loosely fitted and heat-sealed, the sealing member can be prevented from being damaged without any force that damages the sealing member, and the heat-sealing member Since one end is sealed before being heated and sealed, an effect of reliably suppressing a decrease in internal pressure can be obtained.

    According to a fourth invention, in the first to third inventions, the sealing member includes an opening means.

    Thereby, removal of a sealing member can be easily performed using an opening means.

  In a fifth aspect based on the fourth aspect, the unsealing means of the sealing member is constituted by a pull tab in which a cut portion is formed.

  Thus, the pulling tab pulls the cut portion stress to maximize the crack, and the crack can be generated, and the sealing member can be partly broken and removed from the cut, so that the removal can be easily performed.

  In a sixth aspect based on the fifth aspect, the unsealing means for the sealing member includes a groove extending from the pull tab cut portion.

  Thereby, since the crack produced from the notch portion is easily broken along the thin groove portion, an effect that the removal can be performed more easily is obtained.

  According to a seventh invention, in the first to sixth inventions, the pipe outer peripheral portion is provided with a drop prevention groove provided at a right angle to the pipe center line.

  As a result, even if a force that tries to escape the sealing member due to the pressure of the sealing gas in the compressor, the locking member is formed by the prevention member entering the prevention groove so that the pressure of the sealing gas is reduced. Even if it becomes high, it does not come off easily, and an effect that a reliable sealing effect can be obtained is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a horizontal sectional view of a compressor using a pipe sealing device according to an embodiment of the present invention, FIG. 2 is a perspective view of a pipe according to the embodiment, and FIG. 3 is a perspective view according to the embodiment. It is a perspective view of a pipe equipped with a sealing member.

  1 to 3, the compressor 101 includes a compression element 103 housed in a sealed container 102, a refrigerant discharge pipe 104 fixed to the sealed container 102, a refrigerant suction pipe 105, and a refrigerant replenishment pipe 106. Hereinafter, the refrigerant discharge pipe 104, the refrigerant suction pipe 105, and the refrigerant replenishment pipe 106 are collectively referred to as a pipe 108.

  As shown in FIG. 2, the pipe 108 includes a drop prevention groove 110 provided at a right angle to the center line of the pipe, and a sealing member 107 is fitted therein as shown in FIG. 3.

  The sealing member 107 is formed of a heat-shrinkable cap molded from a PET material whose one end is sealed, and includes pull tabs 111 as opening means. From both sides of the pull tab 111, notches 112 and further from the notches 112 An elongated groove 113 is provided.

  About the sealing device comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the manufacturing process of the compressor 101 will be described.

  The compressor 101 welds the airtight container 102 after accommodating the compression element 103 in the airtight container 102. After welding, painting is performed, and the inside of the compressor 101 is deaerated, heated, and dried.

  Thereafter, after sealing nitrogen or dry air, the sealing member 107 is fitted into the pipe 108, and the sealing member 107 is heated with a dryer or the like. As a result, the sealing member 107 contracts and seals the opening of the pipe 108. As a result, since moisture in the atmosphere can be prevented from entering the compressor 101, the occurrence of rust in the compressor 101 can be prevented, and the compressor 101 can be stored for a long period of time. it can.

  At this time, since the sealing member 107 made of a heat shrink cap is fitted to the pipe 108 and heated as described above to shrink and attach to the pipe opening to seal it, for example, if it is loosely fitted to the pipe opening end. Good and easy to install.

  In addition, when heating for attaching the sealing member 107, the sealing member 107 is subjected to stress at the time of heat-heat shrinkage, but since the stress that destroys the sealing member 107 does not work, it is damaged. Workability is remarkably improved.

  Further, in this embodiment, since the escape preventing groove 110 provided at a right angle to the center line of the pipe 108 is provided on the outer periphery of the pipe 108, the sealing member 107 is caused by the pressure of the sealed gas in the compressor 101. Even if a force to pull out is applied, the sealing member 107 is heat-shrinked into the slip-out preventing groove 110 to form a locking portion, so that it can be easily pulled out even when the pressure of the sealed gas increases. The effect that there is no is obtained.

  Further, in this embodiment, the sealing member 107 is provided with an unsealing means, and this unsealing means includes a pull tab 111. On both side surfaces of the pull tab 111, a notch 112 and a groove 113 extended from the notch 112 are provided. I have. As a result, if the pull tab 111 is pulled at the time of opening, the stress of the cut portion 112 is maximized and a crack is generated in the sealing member 107. The crack generated from the cut portion 112 is easily broken along the thin groove portion 113. Therefore, it can be easily removed.

  Moreover, since the PET material constituting the sealing member 107 exhibits high shielding properties against heat as well as moisture against gas as well as moisture, good sealing performance can be maintained over a long period of time and is effective. .

(Embodiment 2)
FIG. 4 is a perspective view showing a sealing member in the second embodiment. The sealing member 107 is formed of a heat shrink cap with one end sealed. When the sealing member 107 made of the heat shrink cap is also fitted to the pipe opening end and heated, the heat shrinking cap is applied to the pipe opening end. Since this is sealed, the sealing member 107 made of a heat-shrinkable tube only needs to be loosely fitted to the pipe opening end. Can also be prevented. In the case of this heat-shrinkable tube, the one-end closed portion is closed by heat shrinkage.

  Further, the sealing member 107 made of this heat shrinkable tube is also provided with the pull tab 111, the cut portion 112, and the groove portion 113 extended from the cut portion 112, as in the first embodiment. Can be easily removed as in

  As described above, the pipe sealing device for a compressor according to the present invention can be a pipe sealing device that prevents breakage of the sealing member and has good detachability by providing an opening means. It can be widely applied to applications such as hermetic compressors used in cases, dehumidifier air conditioners and vending machines.

DESCRIPTION OF SYMBOLS 101 Compressor 102 Airtight container 103 Compression element 104 Refrigerant discharge pipe 105 Refrigerant suction pipe 106 Refrigerant replenishment pipe 107 Sealing member 108 Pipe 110 Fall prevention groove 111 Pull tab 112 Cut part 113 Groove part

Claims (7)

A pipe sealing device for a compressor having a pipe fixed to a hermetic container and a sealing member for sealing an open end of the pipe, wherein the sealing member is made of a material having a high thermal contraction rate. The pipe sealing device for a compressor according to claim 1, wherein the sealing member is formed of a cylindrical heat shrinkable tube. The pipe sealing device for a compressor according to claim 1, wherein the sealing member includes a heat-shrinkable cap sealed at one end. The pipe sealing device for a compressor according to any one of claims 1 to 3, wherein the sealing member is provided with an opening means. The pipe sealing device for a compressor according to claim 4, wherein the opening means of the sealing member is constituted by a pull tab in which a cut portion is formed. The pipe sealing device for a compressor according to claim 5, wherein the opening means of the sealing member includes a groove portion extending from the pull tab cut portion. The pipe sealing device for a compressor according to any one of claims 1 to 6, wherein an escape prevention groove is provided in the pipe outer periphery at a right angle to the pipe center line.

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