KR20150044431A - Gas discharge arrangement for a refrigeration compressor - Google Patents

Abstract

The compressor of the present invention comprises a shell 1 carrying a gas outlet pipe 1a and accommodating a cylinder cap 10 having a gas outlet 13 and a plastic discharge pipe 20, At least one of the inlet end and the outlet end being connected to an exhaust part, wherein the outlet end and the outlet end are connected to a gas outlet (13) and a gas outlet pipe (1a), respectively, Is defined by the connecting element 30 in the gas outlet 13 or the gas outlet tube 1a,
The connecting element 30 comprises a fixed part 31 attached to the inside of the discharge parts 1a and 13 and a surface on the surface which is fitted into one end of the discharge pipe 20 and acts in contact with the discharge pipe 20 An engaging portion 32 for carrying the means 33 and gripping means 34 disposed between the indicator means 33 and the fixing portion 31 and a gripping means 34 for gripping the gripping means 34, (40) mounted around the discharge tube (20) for compressing the discharge tube (20).

Description

TECHNICAL FIELD [0001] The present invention relates to a gas discharge device for a refrigeration compressor,

The present invention relates to a motor-compressor assembly for reciprocating inside a cylinder defined in a cylinder crankcase and providing a piston closed at one end by a cylinder cap defining a discharge chamber therein To a discharge device to be applied to a freezing hermetic compressor of the type comprising. The gas discharge of the compressor is provided with a discharge tube which is attached to the cylinder cap and which provides an inlet end open to the discharge chamber and an opposite outlet end open to the gas outlet tube provided in the orifice of the sealed shell. The discharge tube provides communication of the fluid between the high pressure side of the refrigeration system and the discharge chamber to which the compressor is connected.

Vapor-compression machines, such as the type of refrigeration compressors used in refrigeration systems, compress the refrigerant gas in the compression unit inside the shell, which guides the compressed gas to the high pressure side of the refrigeration system to which the compressor is coupled do. Such compressors generally include a motor-compressor assembly having a cylinder crankcase defining a cylinder inside the shell, and the piston is moved axially by the action of an electric motor rotating or linearly inside the cylinder .

The cylinder has an open end in which the piston is received and an opposite end closed by a valve plate on which the cylinder cap is abutted. The valve plate is configured to cooperate with at least one discharge valve which is turned inwardly of the discharge chamber.

The compressed gas in the cylinder is guided to the outside of the compressor through an inlet end hermetically coupled to the cylinder cap and an outlet end having an opposite end hermetically attached to the gas outlet tube mounted in the hole provided in the shell of the compressor .

In known solutions where the discharge tube is metal, the connection of the discharge tube to the cylinder cap and the gas outlet tube may be accomplished by welding, direct brazing, or an intermediate body (see, for example, Brazilian patent application PI0300607-7 US Patent Publication No. 2004/0052661).

In the structural solution described and exemplified in US2010 / 0226805A1, mounting the outlet end of the metal outlet tube inside the gas outlet tube is in the form of a tubular sleeve made of plastic material and positioned between the outlet tube and the gas outlet tube With the help of a connector that carries out the operation.

In solutions where the discharge tube is made of a plastic material, connection to the cylinder cap is made, for example by fitting the inlet end of the plastic discharge tube around a tubular nozzle projecting from the cylinder cap. However, retention of the plastic discharge tube to the tubular nozzle can be achieved, for example, by means of an adhesive, with or without the provision of a retaining ring which simultaneously surrounds the inlet end of the plastic discharge tube and the tubular nozzle of the cylinder cap As can be done with the help of some means.

A known mounting arrangement of the outlet end of the plastic discharge pipe in the metal gas outlet pipe of the hermetic shell is described and exemplified in patent document WO 2007/012472 A2 and in order to have an outer end welded to the high pressure pipe of the refrigeration system to which the compressor is connected, And providing a metal gas outlet tube projecting inwardly and outwardly of the shell. The metal gas outlet tube has an inner diameter sized to closely receive the outlet end of the plastic outlet tube and the outlet end portion of the plastic outlet tube is disposed along the interior of the entire extension extension of the gas outlet tube. The close fit of the plastic drainage tube in the interior of the metal gas outlet tube, together with the longitudinal extension of the fittable fitting, already provides sealing between the two tubular extensions, The seal is complemented by radial deformation of at least one of the metal gas outlet tubes into the plastic discharge tube.

In these known compressor arrangements, there are several problems that need to be solved by the proper physical arrangement of the discharge system, including connections of the discharge tube with the cylinder cap and shell of the discharge tube.

The use of a drainage tube made of a metal material is advantageous for avoiding rupture of the discharge tube by fatigue and also for avoiding restrictions on the gas and heat transfer path from the extruded gas to the interior of the sealed shell, Transmission of vibration, delivery of gas extrusion noise to a closed shell, shipping and resistance to operating conditions.

Conventional solutions for connecting the metal drain to the shell of the cylinder cap and the components of the cylinder cap may also have an insulation failure of the compressor motor in addition to the problems presented above, resulting in current leakage in the compressor motor, This leakage has a discharge structure as one of the passages of the flow reaching the compressor shell and a metal structure associated with the compressor shell.

In order to solve the problems associated with the use of the metal discharge tube, as mentioned above, the metal discharge tube is usually provided with an inner diameter which is large enough to minimize the load losses and exhibits some curved portions and long lengths with straight portions , Which is to minimize both the vibration transmission to the shell and the possibility of fatigue failure.

In addition to having a larger amount of material and having a complicated assembly, the solution can not avoid the noise problem that is transmitted to the shell during gas compression, which usually does not provide a certain type of thermal insulation on the metal discharge tube In addition to the problem of heat transfer from the compressed gas to the inside of the shell, it also requires the use of buffered elements mounted on the tube, which further increases the cost of such a known solution. In order to solve the problems of providing a drain pipe made of a metal material, a known solution using a flexible drain pipe with a material having a low thermal conductivity, for example a polymer plastic material (WO 2007/012472) Has come.

While solving all of the issues associated with metal drain pipes, the prior art solution using polymer flexible drain can also include additional elements that are over-injected and some drawbacks related to the essential provision of retaining rings , And these drawbacks are due to the fact that in addition to causing difficult and costly assemblies, structural defects that compromise discharge tightness with failures during fixation and sealing to the gas outlet tube and cylinder cap Allow failures.

With the disadvantages of the prior solutions, it is an object of the present invention to provide a gas exhausting device in a refrigeration compressor, which has a low thermal conductivity in the parts of the shell of the cylinder cap and compressor, The connection can provide a reliable and resistive connection of a discharge tube made of material which can be adapted to different compressor configurations by indicating a simple configuration and a practical installation so that the vibrations of the compression mechanism and the noise of the gas compression To the hermetically sealed shell.

This object of the present invention is also achieved by a gas compressor comprising a shell for carrying a gas outlet tube and containing a cylinder, a shell for accommodating a gas compression mechanism comprising a cylinder cap having a gas discharge chamber and defining a gas discharge chamber and a gas to be applied to a refrigerating compressor of the type comprising a discharge tube Wherein the outlet tube is made of a flexible plastic material having an inlet end coupled to the gas outlet and an outlet end coupled to the gas outlet tube.

According to the present invention, at least one of the parts defined by the inlet end and the outlet end of the discharge pipe is connected by a tubular connection element to the discharge part defined by any one of the gas outlet and the gas outlet pipe, Such tubular connection elements include a securing portion to be attached to the interior of each discharge component; An indicator means on the surface that is interfitted with interference within one end of the outlet tube and produces corresponding radial deformation in the outlet tube; at least one gripping surface disposed between the indicator means and the anchoring portion on the surface; An engaging portion having means; And a retaining ring disposed radially around the end of the discharge tube and compressing the discharge tube so that the gripping means of the engaging portion of the connecting element is spiked in the discharge tube.

The present invention provides a discharge device having a connection to a discharge pipe that provides one of the advantages of being easy to assemble. The arrangement set forth above allows to improve the connection of a discharge pipe made of a flexible plastic material to at least one of the discharge parts defined by the shell of the cylinder cap and the compressor through a simple and cost effective construction.

Considering that the device of the present invention also uses a discharge tube made of an electrically non-conductive plastic material, it does not damage the thermal insulation and electrical insulation of the motor-compressor assembly with respect to the hermetic shell, Avoiding the risk of current flow from the assembly to the shell and heat transfer.

The configuration also allows for less load loss when pumping the refrigeration fluid so as to optimize the dimensions of each coupling element as well as the drain pipe.

The apparatus of the present invention also does not affect the benefits of reducing noise delivered to the shell, without the need to require additional cushioning components, due to the fact that the discharge tube is comprised of a flexible plastic material.

The invention is described below with reference to the accompanying drawings given as an example of one way of practicing the invention.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of a cylinder cap and respective coupling elements constructed in accordance with the apparatus of the present invention.
Fig. 2 is a perspective view similar to that of Fig. 1 but with the connecting element mounted on the cylinder cap; Fig.
Figure 3 is a cross-sectional view of the assembly illustrated in Figure 2 taken along section line III-III in Figure 2;
Figure 4 is a partial cross-sectional view of a closed shell of a compressor carrying a gas outlet tube to which each connecting element is applied.
5 is a perspective view of a connecting element of the device of the present invention;
Fig. 6 is a longitudinal cross-sectional view of the connection element of Fig. 5, in which the engaging portion of this connection element, using the first embodiment of the retaining ring, is inserted and received within the adjacent end of the discharge tube, Vertical section.
6a is a partial perspective view of the retaining ring of Fig. 6 in a radially incised state; Fig.
Fig. 7 is a longitudinal cross-sectional view of the connection element of Fig. 5, wherein the engagement portion of such a connection element is shown in Fig. 5 with the connection element of Fig. 5 being fitted and accommodated inside the proximal end of the discharge tube, Fig.
Figure 7a is a partial perspective view of the retaining ring of Figure 7 in a radially incised state;

The present invention is described below with respect to a reciprocating closed type refrigerating compressor, which comprises a closed shell 1 carrying a gas outlet tube 1a and housing a motor-compressor assembly (not shown) , This assembly comprising a gas compression mechanism comprising a cylinder crankcase 2 (partially illustrated in FIG. 3), which cylinder or crankcase 2 is internally rotatable or of a linear electric motor (also not shown) Thereby defining the cylinder 3 for moving the piston (not shown) in the axial direction.

The cylinder crankcase 2 may be constructed of any suitable metal alloy known in the art.

The cylinder 3 has an open end portion into which the piston enters and an opposite end portion closed by the valve plate 4 (shown in Fig. 3). The cylinder 3 abuts against the valve plate 4 and is generally made of metal A cylinder cap (10) is placed. The valve plate 4 includes at least one inhalation valve, not shown, which is turned inside the cylinder 3, and at least one inlet valve (not shown), which operates in conjunction with the respective discharge orifices (not shown) And at least one discharge valve capable of taking the form of a single sheet (5) incorporating a plurality of flexible metal blades.

The valve plate 4 is placed on the cylinder crankcase 1 by an annular sealing gasket and another annular gasket 7 disposed between the adjacent face of the valve plate 4 and the cylinder cap is also provided do. The cylinder cap 10 abuts against one surface of the valve plate 4 as opposed to abutting against the cylinder crankcase 2. The cylinder cap 10 maintains selective fluid communication with the cylinder 3 through the discharge openings when the discharge valve is open and the compressor is connected to the discharge chamber 11 (1) sealingly attached through the shell (1) of the refrigerator, through a discharge pipe (20) in communication with the outlet (20) of the compressor, and the outlet side of the refrigeration system And internally defines a gas discharge chamber (11) for maintaining fluid communication. The gas outlet tube 1a generally connects the discharge side of the refrigeration compressor to a discharge line of the refrigeration system in which the refrigeration compressor is operatively associated.

The discharge tube 20 is obtained from plastic and is obtained from a thermally nonconductive material, preferably flexible, such as, for example, a polymeric material such as a PTFE polymer (polytetrafluoroethylen), although flexible. The polymeric material exhibits a coefficient of thermal conductivity that is much lower than that of the metal alloys, thereby allowing a reduction in length thereof by imparting a lower heat transfer coefficient to the discharge tube 20, and when pumping refrigerant gas therethrough Reduces the loss of load.

The cylinder cap 10 takes the form of a cup and in this case its open base lies on the valve plate 4 and has a gas inlet 12 in fluid communication with the outlet orifice (s) And a gas outlet 13 coupled to the gas outlet 13.

The outlet tube 20 has an inlet end 21 coupled to the gas outlet 13 of the cylinder cap 10 and an outlet end 22 coupled to the gas outlet tube 1a of the shell 1.

In the illustrated configuration there is an open base of the cylinder cap 10 and an end wall 14 opposite the valve plate 4 and a cylinder cap 10 Is provided. It should be understood, however, that the gas outlet 13 may be provided laterally in the cylinder cap 10, and that such positioning of the gas outlet 13 is not limited to the illustrated arrangement.

The cylinder cap 10 further provides a channel 16 provided at the end wall 14 and disposed orthogonally to the gas outlet 13 of the cylinder cap 10. In particular, In the specially exemplified arrangement, the end wall 14 exhibits a lowered portion 17 and the channel is open through the gas outlet 13 into this portion 17.

In the illustrated configuration, the outlet nozzle 13 of the cylinder cap 10 is attached to the inside of it by any suitable means such as, for example, threading, gluing, or brazing Is configured to receive and secure the connection element (30) to be coupled to the adjacent inlet end (21) of the discharge tube (20) with a tubular body protruding outwardly from the outlet nozzle (13).

The illustrated connecting element 30 is formed, for example, as a single piece of metallic material. However, the present invention can be made with a connecting element made of a plurality of pieces that are made separately and stuck together to form the connecting element.

According to the invention, at least one of the inlet end 21 and the outlet end 22 of the outlet tube 20 is connected to the gas outlet 13 of the cylinder cap 10 via each connecting element 30 Or to the discharge part defined by the gas outlet tube 1a of the shell 1.

The connecting element 30 has a fixing part 31 to be attached inside each discharge part defined by the gas outlet 13 of the cylinder cap 10 or the gas outlet tube 1a of the shell 1, Which is interposed in one end of the discharge pipe 20 adjacent to one of the gas outlet 13 of the cap 10 and the gas outlet pipe 1a of the shell 1, 32).

The engaging portion 32 of the connecting element 30 has an indexing means 33 on the surface making the corresponding radial deformation 20a in the discharge tube 20 and the indicator means 33 on such surface, And at least one gripping means (34) arranged in surface-to-surface relationship between the fastening portion (31) and the fastening portion (31).

The apparatus of the present invention includes a retaining ring 40 provided around the distal end of the outlet tube 20 mounted to the connecting element 30 to retain one end of the outlet tube 20 mounted to the adjacent connecting element 30. [ And the retaining ring 40 radially compresses the end of the discharge tube 20 to spike the gripping means 34 of the engaging portion 32 of the connecting element 30 at the discharge tube end .

The retaining ring 40 can be obtained from any material and when it is mounted about the respective end of the discharge tube 20 already associated with each coupling element 30, Which may radially compress the distal end to abut the wall of the discharge tube 20 of plastic material to press the gripping means 34. In one embodiment, the retaining ring 40 is metal.

An indicator means 33 on the surface is provided in the tubular body of the connecting element 30 radially projecting outwardly from the engaging portion 32 at a position remote from the fixing portion 31.

In the first embodiment illustrated in Figures 6 and 6a, the retaining ring 40 is fixed in one direction by a radial deformation 20a at the distal end of the discharge tube 20, Lt; RTI ID = 0.0 > radially < / RTI > In such an arrangement the retaining ring 40 is axially retained between the radial deformation 20a of the adjacent end of the discharge tube 20 and the anchoring portion 31 of the connecting element 30.

The retaining ring 40 therefore includes a pair of opposing ends 40a (40a) of the retaining ring 40 that abut the radial deformation 20a and abut the securing portion 31 of the connecting element 30, , 40b.

In the illustrated configuration, the surface indicator means 33 on the surface is defined by a circumferential rib 33a having a cross section in the form of a convex arc.

The retaining ring 40 also has retaining ring 40 around a portion of the discharge tube 20 that externally surrounds the engaging portion 32 of the connecting element 30, as illustrated in Figures 6 and 6A. It is possible to incorporate a generally designated stop element B by means of a circumferential shoulder 41 against which a tool (not shown) for insertion can be abutted. In this configuration, the inner surface of the retaining ring 40 need not be forcibly provided with any surface accident in order to cooperate with the radial deformation 20a in the discharge tube 20.

In the second embodiment illustrated in Figures 7 and 7a, the retaining ring 40 is dimensioned to allow the indexing means 33 on the surface to extend beyond the area of the provided connecting element 30 . In this case, the retaining ring 40 should be provided internally with a circumferential groove 42 configured to receive therein radial deformation 20a of the adjacent end of the discharge tube 20. In this configuration, only the end rim 40b of the retaining ring 40 is axially locked when it abuts and seats against the fastening portion 31 of the connecting element 30. [ The opposite end rim 40a of the retaining ring 40 remains free to rest against any retention means and not seated. The axial locking of the retaining ring 40 in the direction of the securing portion 31 away from the connecting element 30 is achieved by the radial deformation of the outlet tube 20 received within the circumferential groove 42 of the retaining ring 40 (20a). It should be appreciated that cooperation between the radial deformation 20a and the circumferential groove 42 may be made to allow relative axial locking in both directions between the retaining ring 40 and the outlet tube 20. [ In this case, the retaining ring 40 need not have its distal rim 40b abutting against the fixed portion 31 of the connecting element 30.

The retaining ring 40 illustrated in Figures 7 and 7a includes a tool (not shown) for inserting the retaining ring 40 onto a portion of the discharge tube 20 surrounding the engaging portion 32 of the connecting element 30 (B) which can take the form of a previously cited circumferential shoulder (41) which can abut against the stop element (B).

Although not illustrated, holding the discharge tube at the connecting element can be obtained by using a retaining ring extending beyond the joint element area provided with the surface means 33 on the surface, and the surface means 33 on this surface A radial compression of the ring may take the form of an accident on a recessed surface, such as a circumferential recess in the connecting element, against which a portion of the discharge tube is pushed against. In this case, the retaining ring is provided with an inner circumferential rib which is obtained when fitted in the circumferential recess of the connecting element, which is in conformity with the deformation zone of the outlet tube.

The indicator means 33 on the surface which is carried by the connecting element 30 and which will be described later are arranged in such a manner that the respective connecting elements 30 (30) close to the cylinder cap 10 and / or close to the outlet tube 1a of the shell 1 In the direction away from the anchoring portion 31 of the connecting element 30 holding the outlet tube 20 so as to be firmly attached to the retaining ring 40 in the axial direction.

The circumferential rib 33a should show a shape that avoids the generation of tensile forces in the discharge tube 20 during the operating state and the handling state of the compressor when the retaining ring 40 is fixed to the discharge tube 20. As a result, it should be understood that the convex shape is the only way to practice the present invention and is therefore not considered to be limiting.

One end of the discharge tube 20 is pushed past the indicator means 33 on the surface and then over the grip means 34 when the discharge tube 20 is mounted on each connecting element 30 And the distal end is pushed during the fitting until it reaches the fastening portion 31 of the connecting element 30.

In this step, the holding ring 40 abuts the connecting element 30 to compress the discharge tube 20 to abut the adjacent portion of the inner wall of the discharge tube 20 so that the mechanical means of the gripping means 34 And retains said discharge tube (20) in the axial direction on the connecting element (30) by interference.

The illustrated surface means 33 on the surface is dimensioned to cause a corresponding deformation of the discharge tube on its inner and outer surfaces such that the inner surface reproduces the shape of the indicator means 33 on the surface, Producing a radial strain 20a. On the other hand, the gripping means 34 is set to cause only deformation at the inner surface of the discharge tube 20, and the deformation is not transferred to the outer surface of the discharge tube 20.

The outer radial deformation 20a in the outlet tube 20 is such that after the retaining ring 40 is mounted away from the anchoring portion 31 of the connecting element 30 and outside the engaging portion 32 of the retaining ring 40 To define an axial stop with respect to the retaining ring 40 that cooperates to prevent axial movement of the retaining ring 40. [

In the illustrated configuration the gripping means 34 is in the form of a truncated conical circumferential projection whose smaller base 34a coincides with the contour of the engaging portion 32 and the larger base 34b Projects outwardly from the engaging portion 32 and defines an annular step that is turned by the fastening portion 31. As illustrated, the gripping means 34 may take the form of successive annular projections. However, the gripping means 34 can be defined by protrusions in the form of teeth that are circumferentially distributed in an annular array but spaced apart from each other, and the connecting element 30 It should be appreciated that a plurality of circumferential alignments of protrusions defining the gripping means 34 may be indicated.

The gripping means 34 is arranged to grip the shaft 20 between the engaging portion 32 of the coupling element 30 and the discharge tube 20 in order to avoid separation between the parts of the discharge tube 20 and the coupling element 30. [ Determine the radial mechanical engagement that facilitates direction locking.

The engaging portion 32 includes one free end 32a and stopping means 34 that meet the fastening portion 31 and protrude radially outwardly from the contour of the engaging portion 32 and are spaced apart from the gripping means 34 Lt; RTI ID = 0.0 > 35 < / RTI >

In the illustrated configuration, the stop means 35 is defined by an annular flange attached around the opposite end 32b of the engaging portion 32. [

With respect to any of the above arrangements, at a location remote from the free end 32a of the engaging portion 32, the connecting element 30 is provided with surface indicator means 33 on the surface.

According to the invention, the fixing part 31 of the connecting element 30 is cylindrical, and each exhaust part 13 defined by the gas outlet 13 of the cylinder cap 10 or the gas outlet tube 1a of the shell 1, As shown in Fig. It is to be understood, however, that the connecting element may be attached to the gas outlet of the shell or to parts of the cylinder cap, through threading, welding, brazing, etc., and that the securing means is not considered to limit the present invention.

With regard to the solution of attaching the connecting element by threading the part of the cylinder cap 10 and / or the gas outlet tube 1a of the shell 1, the fixing part 31 of the connecting element 10 is fixed to the cylinder cap < (30a) to be attached to the corresponding threaded portion provided on each discharge part, defined in any one of the gas outlet (13) of the shell (1) and the gas outlet tube (1a) of the shell .

It should be understood that the discharge arrangement of the present invention should be practiced regardless of the unique elements on the configuration of the cylinder cap 10, the positioning means, and the like.

It should also be noted that the structural variations described herein may be represented individually or in part, or in complete conjunction with one another, particularly in their configurations.

By providing a retaining ring between the fastening portion 31 of the connecting element 30 and the indicator means 33 on its surface it is possible to avoid concentrating tensions on the external parts of the discharge tube 20 and to avoid fatigue and rupture of the discharge tube , Which is due to the fact that the discharge tube is moved by the movement of the motor-compressor assembly relative to the stationary closed shell. In the proposed arrangement, the tensions are more concentrated in the inner portion of the discharge tube when the discharge tube is subjected to a movement resulting from compressor operation.

Claims (13)

A gas discharge device for a refrigeration compressor,
The apparatus comprises a shell (1) carrying a gas outlet tube (1a) and housing a gas compression mechanism comprising a cylinder (3) and a cylinder cap (10) and a discharge tube (20)
The cylinder cap (10) internally defines a gas discharge chamber (11) and has a gas outlet (13)
The outlet tube 10 is made of a flexible plastic material and has an inlet end 21 coupled to the gas outlet 13 and an outlet end 22 coupled to the gas outlet tube 1a,
At least one of the inlet end (21) and the outlet end (22) of the discharge pipe (20) is connected to the gas outlet port (13) and the gas outlet pipe Which is connected to a discharge part defined by the discharge part,
The tubular connecting element 30 is
- a fixing part (31) to be attached to the inside of each discharge part (1a, 13);
An indicator means 33 on the surface that is interfitted with interference within one end of the outlet tube 20 and which creates a corresponding radial strain 20a in the outlet tube 20; An engaging portion (32) having at least one gripping means (34) disposed on the surface between the fixed portion (31) and the fixed portion (31); And
The discharge tube 20 is arranged around the distal end of the discharge tube 20 and in which the gripping means 34 of the engaging portion 32 of the connecting element 30 is spiked in the discharge tube 20, And a retaining ring (40) for compressing the gas in the freezing compartment. The method according to claim 1,
An indicator means (33) on the surface is spaced from the fixing portion (31) and protrudes radially outwardly from the engaging portion (32)
Characterized in that said retaining ring (40) is retained axially by said radial deformation (20a) of said end of said discharge tube (20) in at least one direction and in the opposite direction by said securing part (31) And a gas discharge device for a refrigeration compressor. 3. The method of claim 2,
The retention rings 40 each have opposite end edges 40a, 40b that abut the radial deformation 20a of the distal end of the discharge tube 20 and abut the fixed portion 31 of the connecting element 30, ) For the refrigerant compressor. 3. The method of claim 2,
The retention ring 40 has an end rim 40b which lies axially and locks against and engages with a fixed portion of the connecting element 30 and a free opposite end rim 40a,
The holding ring 40 is provided internally with a circumferential groove 42 which receives and axially locks radial deformation 20a of the adjacent end of the discharge tube 20 within the retaining ring 40 Wherein the gas discharge device for a refrigeration compressor comprises: 5. The method according to any one of claims 1 to 4,
Characterized in that the indicator means (33) on the surface is defined by a circumferential rib (33a) having a convex arc-shaped cross section. 6. The method according to any one of claims 1 to 5,
Wherein the gripping means 34 is in the form of a truncated conical circumferential projection and the small base 34a of the gripping means 34 coincides with the contour of the engaging portion 32, Characterized in that the large base (34b) of the means (34) projects outwardly from the engaging portion (32) and defines an annular step turned by the fixing portion (31). 7. The method according to any one of claims 1 to 6,
The engaging portion 32 includes a free end 32a and stopping means 35 which meet the fastening portion 31 and project radially outwardly from the contour of the engaging portion 32 remote from the gripping means 34 And an opposite end (32b) that carries the gas (32). 8. The method of claim 7,
Characterized in that said stop means (35) is defined by an annular flange attached around the opposite end (32b) of the engaging portion (32). 9. The method according to claim 7 or 8,
Characterized in that the surface means (33) on the surface is spaced from the free end (32a) of the engagement portion (32). 10. The method according to any one of claims 1 to 9,
Characterized in that the connecting element (30) is made in a single piece. 11. The method according to any one of claims 1 to 10,
Characterized in that the fixing part (31) is cylindrical and attached with adhesive to each discharge part defined by any one of the gas outlet (13) and the gas outlet pipe (1a). 11. The method according to any one of claims 1 to 10,
Characterized in that the fixing part (31) comprises an external thread to be attached to each discharge part, defined by any one of the gas outlet (13) and the gas outlet tube (1a) Device. 13. The method according to any one of claims 1 to 12,
The retention ring 40 is configured to allow the tool for insertion of the retaining ring 40 to rest on a portion of the tube 20 surrounding the engagement portion 32 of the coupling element 30, Characterized in that it externally integrates the stop element (B) defined by the shoulder (41) of the freezing compartment.

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