MXPA00012565A - Suction muffler and closed electric compressor - Google Patents

Abstract

A suction muffler, wherein component parts formed by injection-molding a thermoplastic synthetic resin are connected to each other by induction welding, whereby the muffler becomes superior in uniformity of weld strength on the entire connection part and less burrs to a suction muffler having a connection part formed by the conventional ultrasonic welding and vibration welding.

Description

SUCTION SILENCER AND CLOSED ELECTRIC COMPRESSOR TECHNICAL FIELD The present invention relates to a hermetic compressor (hereinafter referred to as a compressor) for use with electric refrigerators, air conditioners and the like, and more particularly to a suction muffler included in the compressor.

BACKGROUND TECHNIQUE The principle of refrigeration in electric refrigerators, air conditioners, and the like is briefly described below. A compressor is used to compress a refrigerant gas to raise its pressure. The high pressure refrigerant gas is cooled and liquefied. When the liquefied gas is vaporized in an evaporator, the gas extracts the heat of the vaporization from the air inside a refrigerator or a room. The evaporated refrigerant gas is returned to the compressor. The aforementioned operation is repeated, thus lowering the temperature of the air inside the refrigerator or the room. In the present invention, the aforementioned change of the refrigerant, from being discharged from the compressor to returning to the compressor, is referred to as a refrigeration cycle. Refrigerants based on hydrofluorocarbon (HFC) or hydrocarbon (HC) that do not include chlorine, are used as refrigerants. In recent years, these refrigerants have been used frequently in place of chlorofluorocarbon-based refrigerants, which have been banned because they destroy the ozone layer. In particular, HC-based refrigerants do not cause a significant greenhouse effect, where the use of HC-based refrigerants is also intended to prevent global warming. The compressor disclosed in the Publication of Japanese Patent No. Hei 3-45212, for example, is known as a conventional compressor. This compressor is hereinafter referred to as the compressor of the conventional example 1. Figure 8 is a sectional plan view showing the interior of the compressor of the conventional example 1. A hermetic cover 1 is substantially cylindrical, and its diameter is almost equal at your height. The upper face and lower face of the sealed cover 1 are sealed to make its internal space airtight. A known compression mechanism 2, an electric motor 3, and a suction muffler 18 are accommodated inside the hermetic cover 1. The electric motor 3 is elastically supported by springs on three dampers 13 arranged in the lower part of the interior of the cover Hermetic 1. In addition, the electric motor 3 is installed in such a way that its arrow becomes substantially coaxial with the hermetic cover 1. The electric motor 3 is electrically connected to an external power supply by means of a terminal connector 11. The compression mechanism 2 comprises a cylinder 4, a piston 5, and a crankshaft portion 12, and is disposed over the electric motor 3. The crankshaft portion 12 is connected to the upper end of the arrow of the electric motor 3. The piston 5 reciprocates inside the cylinder 4 in the horizontal direction by virtue of the revolving force of the electric motor 3, transmitted by means of the portion of c Fig. 12. The space inside the cylinder 4, through which reciprocates the piston 5, is closed by the front end of the piston 5 and a valve plate 6, to form a compression chamber (not shown) for compressing a gas refrigerant. The valve plate 6 is provided with a suction valve for supplying the refrigerant gas into the compression chamber by suction, and a discharge valve for discharging the refrigerant gas from the compression chamber. These valves are not shown in Figure 8. A cylinder head 7 is disposed outside the compression chamber, with the valve plate 6 stopped therebetween. A discharge tube 10 is connected to the cylinder head 7, in such a way that the refrigerant gas can be discharged from inside the head of the cylinder 7 to the outside of the hermetic cover 1. On the other hand, the suction muffler 18 is connected to the external space 18b of the compression chamber. The interior of the suction muffler 18 is provided with a cavity communicating from the outer space 18b of the compression chamber to the suction inlet 18a of the suction muffler 18. The suction inlet 18a is disposed opposite the opening end 9a of a suction tube 9 with a predetermined distance between them. The suction tube 9 supplies the refrigerant gas by suction from outside to inside the hermetic cover 1. The conventional hermetic compressor, having the aforementioned structure, operates as described below, to thereby raise the gas pressure refrigerant, and to supply the high pressure refrigerant gas to an external refrigeration cycle. When the electric motor 3 is driven, the piston 5 is reciprocated inside the cylinder 4 by the crankshaft portion 12. The space inside the compression chamber changes periodically according to the reciprocation. The pressure of the refrigerant gas inside the compression chamber decreases while the space inside the compression chamber increases. At this time, the suction valve (not shown) is opened by the pressure difference between the pressure in the outer space 18b of the compression chamber and the pressure inside the compression chamber, to suck in this way the refrigerant gas from inside the suction muffler 18. On the other hand, the pressure of the refrigerant gas inside the compression chamber rises while the space inside the compression chamber decreases. At this time, the discharge valve (not shown) is opened by the pressure difference between the pressure inside the cylinder head 7 and the pressure inside the compression chamber, whereby the refrigerant gas is discharged at high pressure. pressure from the compression chamber to the head of the cylinder 7. The high pressure refrigerant gas inside the head of the cylinder 7 passes through the discharge pipe 10, and is discharged to the high pressure side of the refrigeration cycle, outside of the hermetic cover 1. The high pressure of the refrigerant gas is lowered in the refrigeration cycle. The refrigerant gas flowing from the low pressure side of the refrigeration cycle passes through the suction pipe 9, and is supplied from its opening end 9a to the sealed cover 1. The refrigerant gas supplied from the end of the opening 9a almost enters directly into the suction inlet 18a of the suction muffler 18. By periodically repeating the aforementioned operation, the compressor of the conventional example 1 continuously supplies the high pressure refrigerant gas to the refrigeration cycle. The internal space in the hermetic cover 1 is sealed from the outside. Accordingly, the noise caused by the electric motor 3, the compression mechanism 2, the refrigerant gas sucked into the compression chamber, and the like, have no chance of leaking outwards. Furthermore, the hermetic cover 1 prevents the lubrication oil from circulating through the different portions of the electric motor 3 and the compression mechanism 2, so that it does not spread outwards. In addition, the airtight cover 1 stores the lubrication oil at the bottom of its internal space, to prevent it from leaking outwards. The suction muffler 18 serves to attenuate the noise caused by a flow of high velocity refrigerant gas sucked into the compression chamber. The refrigerant gas supplied to the suction muffler 18 advances through the cavity inside the suction muffler 18, and is sucked from the outer space 18b of the compression chamber into the cylinder 4, and into the compression chamber. The shape of the cavity inside the suction muffler 18 is designed to sufficiently reduce the velocity of the refrigerant gas flow while passing the refrigerant gas. For example, the suction muffler 18 may have partition walls (not shown in Figure 8), such that the cavity inside the suction muffler 18 is divided into several chambers by the partition walls. In this case, the flow of refrigerant gas winds through the chambers inside the suction muffler 18 in sequence, whereby the flow velocity is reduced. This reduces the level of noise caused by the flow of refrigerant gas in the vicinity of the outer space 18b of the compression chamber. As described below, the suction muffler 18 also operates to separate the fog-type lubrication oil included in the refrigerant gas inside the suction muffler 18, so that the lubrication oil can not be sucked in from the suction muffler. the compression chamber. When the refrigerant gas is sucked into the suction muffler 18 through the suction inlet 18a, the lubricating oil that floats in mist in the space inside the airtight cover 1, is also sucked together with the refrigerant gas. If the mist type lubrication oil is sucked directly into the compression chamber, the lubrication oil can be attached to the suction valve or to the discharge valve, thereby deteriorating its functions. Further, if the lubricating oil is discharged to the refrigeration cycle through the discharge tube 10, the lubrication oil can be attached to different portions in the refrigeration cycle, thereby deteriorating the cooling capacity of the refrigeration cycle. However, because the cavity inside the suction muffler 18 is divided into plural chambers as described above, the flow of refrigerant gas winds through the chambers. At this time, the lubricating oil included in the refrigerant gas may collide with, and join, the walls that divide the cavity inside the suction muffler 18, because the lubrication oil is generally heavier than the refrigerant gas. The lubrication oil attached to the walls, as described above, flows down into the suction muffler 18, and is discharged from a small hole (not shown) provided in the bottom portion of the suction muffler 18, to the bottom of the inside of the hermetic cover 1. As described above, the suction muffler 18 is made to sufficiently reduce the speed of the refrigerant gas passing through its interior, and to separate the lubrication oil from the type of mist included in the refrigerant gas In accordance with the foregoing, the suction muffler 18 generally has a complicated shape. In addition, the suction muffler 18 is also made so that the high heat of the electric motor 3 has no possibility of being transferred to the refrigerant gas before being sucked. If the temperature of the refrigerant gas rises before being sucked, the density of the refrigerant gas decreases. If this occurs, the pressure of the pressurized refrigerant gas inside the compression chamber may not reach a predetermined level. To prevent this problem, it is necessary to lower the thermal conductivity of the suction muffler 18. For this reason, the suction muffler 18 is generally made of a synthetic thermoplastic resin having high formability and low thermal conductivity. In addition, the suction muffler 18 is formed by joining plural complicated structural portions. Figure 9 is a perspective view showing the conventional suction muffler 18 formed as described above, and Figure 10 is a perspective view separated into parts thereof. As shown in Figure 10, the suction muffler 18 comprises two portions 181 and 182. The portions 181 and 182 are each formed of a synthetic thermoplastic resin by injection molding. As clearly shown in Figure 9 and Figure 10, the joining face 18c of the portion 181 makes contact with the joining face 18d of the portion 182. Both joining faces 18c and 18d have been joined by conventional ultrasonic welding . The ultrasonic welding has been carried out as described below. Figure 11 is an enlarged vertical sectional view showing the vicinities of the joining faces 18c and 18d. Parts (a), (b) and (c) of Figure 11 show the conditions of the joining portion of portions 181 and 182 at the time before welding, at the time during welding, and at the moment after welding, respectively. As shown in part (a) of Figure 11, the joining face 18c has a projection 18g, and the joining face 18d has a groove 18h, whose width is substantially identical to that of the projection 18g. The projection 18g is adjusted in the groove 18h. As indicated by the arrows shown in part (a) of Figure 11, the pressing force is applied vertically to the joining faces 18c and 18d from the flanges 18e and 18f arranged on the rear sides of the joining faces 18c and 18d, respectively. In the condition where the joining faces 18c and 18d make contact with each other without a substantial gap, an ultrasonic wave is transmitted to the vicinity of the tip 18i of the projection 18g. Then, as indicated by the arrows shown in part (b) of Figure 11, the tip 18i of the projection 18g and the bottom 18j of the groove 18h vibrate and repeatedly collide with each other. This heats and melts the resins in the vicinity of the point 18i of the projection 18g and the bottom 18j of the groove 18h. The transmission of the ultrasonic wave is stopped when the gap between the projection 18g and the groove 18h is completely filled with a molten resin I8k. Then, the molten resin 18k solidifies as shown in part (c) of Figure 11, thereby securing the projection 18g to the groove 18h. In this way, the portions 181 and 182 are joined together. The compressor disclosed in the Application Japanese Patent Laid-open No. Hei 10-252653 is also known as a conventional compressor other than the conventional example 1. This compressor is hereinafter referred to as the compressor of the conventional example 2. Figure 12 is a sectional plan view showing the interior of the compressor of the conventional example 2. Just as in the case of the conventional example 1, the compressor of the conventional example 2 comprises an electric motor 3, a compression mechanism 2, and a suction muffler 8 hermetically sealed inside a hermetic cover 1 The basic configuration of the conventional example 2 is completely the same as that of the conventional example 1. The same components are represented according to the above by the same reference signs, and their descriptions are omitted. The conventional example 2 differs from the conventional example 1 in the following points: a) the compression mechanism 2 is arranged below the electric motor 3, b) the suction inlet 8a of the suction muffler 8 is connected to the opening end 9a of the tube of suction 9, and c) as the most important difference, the joining faces of the suction muffler 8 are welded in a different method. Figure 14 is a perspective view showing the suction muffler 8, and Figure 15 is a perspective view separated into portions thereof. As shown in Figure 15, the suction muffler 8 comprises two portions 81 and 82. The portions 81 and 82 each are formed by injection molding a synthetic thermoplastic resin. As clearly shown in Figures 14 and 15, the joining face 8c of the portion 81 makes contact with the joining face 8d of the portion 82. In contrast to the conventional example 1, in the conventional example 2, the faces of Union 8c and 8d are joined to each other by vibration welding. In the case of the conventional example 2, the shapes of the joining faces 8c and 8d each have two shapes. Figure 16 is an enlarged vertical sectional view showing the vicinities of the joining faces 8c and 8d in accordance with a shape. Parts (a) and (b) of Figure 16 show the conditions of the joint portion at the time during welding, and at the time after welding, respectively. In this form, both joining faces 8c and 8d are flat faces. In the condition where both flanges 8e and 8f are pressurized, such that the connecting face 8c makes contact with the joint 8d completely, the upper portion 81 is vibrated against the lower portion 82 in parallel with the joining faces 18c and 18d, as indicated by the arrows in part (a) of Figure 16. As a result, the joining faces 8s and 8d rub against each other, and heat of friction is generated. This heat of friction starts by melting the portions 81 and 82 made of a synthetic thermoplastic resin. The vibration is stopped when the previously determined heights of the portions 81 and 82 are melted in the vertical direction from the joining faces 8c and 8d. The molten portion 8L of the joint portion then comes to cool and solidifies, as shown in part (b) of Figure 16. As a result, the portions 81 and 82 are joined to each other. In this way, the joining faces 8c and 8d are completely fused, thereby obtaining a high welding resistance. However, on the other hand, the molten portion can be squeezed out from the joining faces 8c and 8d at the time of welding. Figure 17 is an enlarged vertical sectional view showing the vicinities of the joining faces 8c and 8d according to another shape. Parts (a), (b) "and (c) of Figure 17 show the conditions of the joint portion at the time before welding, at the time during welding, and at the time after welding, In this form, the upper joining face 8c is provided with a projection 8g, and the lower joining face 8d is provided with a groove 8h. As shown in part (b) of Figure 17, the pressing force is applied to both flanges 8e and 8f, such that the tip 8i of the projection 8g makes contact with the bottom 8j of the groove 8h. In this condition, the upper portion 81 is vibrated against the lower portion 82 in parallel with the joining faces 8c and 8d, as indicated by the arrows in part (b) of Figure 17. The width of the groove 8h it becomes larger than that of the 8g projection by the amplitude of the vibration. As a result, the tip 8i of the projection 8g is rubbed with the bottom 8j of the groove 8h, thereby generating frictional heat. This heat of friction starts by melting the tip 8i of the projection 8g made of a synthetic resin. The vibration stops when a predetermined height of the tip 8i of the projection 8g melts. At this time, the length of the projection 8g and the depth of the groove 8h have been established, such that the gap between the projection 8g and the groove 8h is fused with the cast portion 8L, and the joining faces 8c and 8d make contact with each other totally. The molten portion 8L then comes to cool, and solidifies as shown in part (c) of Figure 17. As a result, the portions 81 and 82 join with each other. In this form, the hollow in the groove 8h is filled with the molten portion 8L. Accordingly, the molten portion 8L has little chance of being squeezed out of the joining faces 8c and 8d. On the other hand, welding occurs only in the vicinity of the projection 8g, whereby, the welding resistance in this form is less than that of the shape shown in Figure 16. The methods of welding the suction muffler previously mentioned in conventional hermetic compressors, have the problems described below. In both cases of the ultrasonic welding used for the assembly of the suction muffler 18 according to the conventional example 1, and the vibration welding used for the assembly of the suction muffler 8 according to the conventional example 2, the contact portions of the joining faces are vibrated to generate heat. However, portions formed by injection molding a synthetic resin generally have corrugations. The undulations are caused by the lack of uniformity in the injection pressure or the metal molding temperature. These kinds of undulations are generally presented on both joining faces in conventional examples 1 and 2, thus making the joining faces irregular. If the joining faces are irregular, the joining faces can not make contact with each other uniformly at all. As a result, the degree of heating by the vibration becomes uneven in the joint faces as a whole. Accordingly, the heating temperature of the total joining faces becomes non-uniform, whereby, the volume of the molten portion becomes different in different portions of the joining faces. As a result, the weld strength of the total joining faces becomes non-uniform. If the welding resistance is non-uniform as described above, the tension caused in the connecting portion of the suction muffler by the vibration of the electric motor and the like, is concentrated in a portion having low welding resistance, whereby, it is possible that a gap is present in that portion. If a large amount of lubricating oil enters the suction suction from the hole, and accumulates inside the compression chamber, the lubrication oil inside the compression chamber excessively transmits the pressure force of the piston, causing this There is a danger of breakage of the suction valve * and the discharge valve. In addition, the lubrication oil circulates in the refrigeration cycle outside the compressor, and stagnates in the evaporator, thus causing an inappropriate refrigeration. In addition, the gap in the joint portion is widened by the vibration of the electric motor and the like. If the different portions constituting the suction muffler are eventually misaligned as the result of the widened gap, there is a possibility of causing a large abnormal noise. A method is available to increase the force of pressure applied to the joining faces at the time of welding, or a method to prolong the time of vibration, in order to raise the strength of the weld to the extent that it does not Hollows are present, even when the tension is concentrated on a portion that has low solder resistance, as described above. These methods aim to raise the strength of the weld by increasing the volume of the resin to be melted. However, in these methods, it is inevitable that the amount of molten resin becomes excessive in some portions. In these portions, the molten resin can be squeezed out from the joining faces. The portions squeezed outward result in so-called "burrs" when cooled. If the broken parts of the burrs fall into the suction muffler during the operation of the compressor, and then enter the compressor, they are trapped between the piston and the dividing wall of the cylinder, thus causing a danger of preventing the piston from reciprocating. gently. Alternatively, they are caught in the suction valve or the discharge valve, thus causing a danger of damaging the hermetic seal of the compression chamber. Both cases cause a problem of preventing the pressure of the refrigerant gas from rising to a predetermined value. The heating temperature on the joining faces at the time of welding with vibrations is more uniform than that at the moment of the ultrasonic welding, because the vibration in the joining faces due to the ultrasonic welding is generally not uniform on the Union faces completely. On the other hand, the total joining faces can be vibrated in a uniform manner at the time of welding with vibration. However, provided that the heating is carried out by vibration as described above, even when welding vibration is used, it is impossible to eliminate the nonuniformity in the heating temperature due to irregularity on the joint faces. In addition, vibration welding has the following problems. If the frequency is raised excessively during vibration welding, the total joining faces can not vibrate evenly. Accordingly, it is required that the amplitude of the vibration be large to some degree, in order to obtain sufficient heating temperature in the weld with vibration. For this reason, in vibration welding, the widths of the joining faces in the direction of vibration can not be made smaller than a certain value. For example, as shown in part (b) of Figure 17, it is necessary that the width of the groove 8h in the joining face 8d is larger than the width of the projection 8g on the joining face 8c by amplitude of the vibration. Because the width of the groove 8h is large, all the widths of the joining faces 8c and 8d are made large to maintain the strength of the joint portion. For this reason, the widths of the flanges 8e and 8f are larger than the widths required for the application of the pressing force at the time of welding. The large widths of the flanges 8e and 8f are not desirable, because it is necessary to accommodate the suction muffler 8 in the as compact as possible hermetic cover 1. further, because the gap between the groove 8h and the projection 8g is wide, a large amount of molten portion is required to fill the gap. Therefore, a long time is required for welding, and it is difficult to adjust the time for welding. In other words, if the amount of the molten portion is large, the molten portion has a chance to overfill from the groove 8h. On the other hand, if the amount of the molten portion is small, a gap remains between the groove 8h and the projection 8g, thereby lowering the strength of the weld.

DISCLOSURE OF THE INVENTION The present invention aims to provide a compressor having an assembled suction muffler, by mutual and stable joining of its portions made of a synthetic thermoplastic resin, with uniform welding resistance, without causing burrs.

A hermetic compressor according to the present invention comprises: a hermetic cover having an internal space hermetically sealed; an electric motor electrically supported inside the hermetic cover; a compression mechanism driven by the electric motor, and used to compress a refrigerant gas, to thereby raise the pressure thereof; and a suction muffler for passing the refrigerant gas before the compression mechanism, and having: a) plural portions made of a thermoplastic resin, and which are joined to one another in a joint portion by induction welding, and b) a cycle conductor embedded in the joint portion between the portions along the joint portion. With this configuration, the component portions of the suction muffler according to the present invention are joined to each other by induction welding, using the conductor embedded in the joint portion. The temperature of the entire conductor becomes uniform by virtue of the induction heating using the conductor. Accordingly, even when the joint portion is irregular due to undulations caused at the time of molding, the temperature of the joint portion becomes uniform. For this reason, the volume of a molten portion is uniform in the total binding portion. As a result, the resistance of the weld also becomes completely uniform. From this, the connecting portion of the suction muffler becomes stable. In the aforementioned suction muffler, in accordance with the present invention, one of the portions can be provided with a projection, the other portion can be provided with a groove to accommodate the projection, and the conductor can be arranged and secured between the tip of the projection and the groove by welding. With this configuration, the portion fused at the time of welding accumulates in the groove, and fills the gap between the projection and the groove. Accordingly, the molten portion is not squeezed out of the bonding portion, thereby eliminating the danger of burring. It is preferable that the width of the projection be substantially identical to that of the asanaladura. This configuration eliminates any gap through which the molten portion assumed in the groove is squeezed out from the groove. Therefore, the molten portion is unlikely to cause burrs. In addition, the volume of the bone enters the projection and the groove to be filled is the molten portion, it is small. Accordingly, the welding time can be reduced, and the welding can be performed in a safe manner. As a result, a uniform welding resistance can be obtained in the joint portion completely. In the above mentioned suction silencer according to the present invention, from another point of view, the joining portion can be substantially on plural planes of different levels. With this configuration, it is possible to form a suspension silencer by joining somplized portions having curved connection faces. This makes it possible to form a suction muffler having a shape that offers a higher sound attenuation effect. In a preferred embodiment of the suction head according to the present invention, the width of the vertical cross section of the cousel is substantially identical to its thickness. This configuration reduces the proportion of the cirsunferensial length of the sondustor are respected to its vertisal transverse sessión. In other words, this configuration reduces the area of the resin that makes contact with the driver. Therefore, the welded portion is relatively small with respect to the joint portion. For this reason, the molten portion is unlikely to be squeezed out from the joint portion at the time of welding, thus eliminating the danger of burring burrs. In addition, when the sonder is secured between the projection and the groove as described above, the projection and asanaladies required at the time of welding are small. Accordingly, the width of the joint portion can be reduced to the extent required to obtain sufficient weld strength. In another preferred embodiment of the sonication susssion silencer is the present invention, the ansho of the vertical cross-section of the sonder is substantially larger than its thickness. With this configuration, because the thickness of the sondustor is small, the distance between the porsiones of the sussión silencer in the union porsión is small at the moment of welding. This reduces the time for welding, and reduses the volume of the welded portion. As a result, the molten portion has pockets likely to squeeze outwardly from the joint portion at the time of welding, thereby eliminating the danger of burring. In still another preferred embodiment of the sucssion silencer according to the present invention, the sondustor is sustainsially helioidal. With this configuration, the volume of the molten portion is large, depending on the volume of the sonder in the joint portion. Therefore, the resistance of the weld is high. In yet another preferred embodiment of the sonsion susssion silencer are the present invention, the conductor having plural holes are axes orthogonal to its longitudinal direction. With this configuration, the volume of the molten portion that incorporates the condustor with the holes is larger than the volume of the molten portion that incorporates a conductor without holes by the volume of the spaces inside the orifices. In adisión, the sessional area of the portion fused in parallel with the joint saws becomes larger, thus ensuring a higher welding resistances. Although the novel features of the invention are stipulated particularly in the appended claims, the invention, both with respect to its organization and its content, will be better understood and appreciated, together with other objects and characteristics thereof, as from the following detailed description taken in set are the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view separated in parts showing a suction silencer 8 in accordance with mode 1 of the present invention.

Figure 2 is an amplified sessional vertical view showing the vicinity of the junction portion of the upper portion 81 and the lower portion 82, which constitute the sucssion silencer 8, of sonformity are the modality 1. Figure 3 is a view in separate perspective in parts showing the delineation of a welding apparatus are induction the sussion silencer 8 according to the modality 1. Figure 4 is an amplified vertical sectional view showing the vesindad of the bonding porsión at the moment in which is subjected to the suction silencer 8 according to mode 1 to induction welding. Figure 5 is a perspective view separate in parts showing a susceptor silencer 8 of sonformity are modality 2. Figure 6 is an amplified sessional vertical view showing the size of the joining portion of the upper portion 81 and the lower portion 82, constituting the suspension silencer 8, of sonformity are the modality 1. Figure 7 is an amplified sessional vertical view showing the size of the bonding portion at the moment when it is subjected to the suspension silencer 8 of I agree modality 2, to induction welding. Figure 8 is a sectional plan view showing the inside of the compressor according to example 1. The Figure 9 is a perspective view showing a suction muffler 18 according to the conventional example 1. Figure 10 is a separate perspective view in parts showing the suction muffler 18 according to the conventional example 1. Figure 11 is an amplified vertical sectional view showing the vicinity of the joining portion of the portions 181 and 182, which constitute the susción silencer 18, of sonformidad are the sonvensional example 1; Parts (a), (b) and (c) of Figure 11, show the joint portion projections at the time before welding, at the time during welding, and at the time after welding, respectively. Figure 12 is a sectional plan view showing the interior of a hermetic squeeze conditioner are the sonvensional example 2 and the modality 1 of the present invention. Figure 13 is a vertical sessional view showing the prinsipal portion of the hermetic squeezer in accordance with modality 1, taken on line XIII-XIII of Figure 12. Figure 14 is a perspective view showing a susceptor 8 according to the conventional example 2 and with the embodiment 1 of the present invention. Figure 15 is a perspective view separated in parts showing the suspension sill 8 according to the conventional example 2. Figure 16 is an amplified vertical sectional view showing the size of the attachment portion of the upper portion 81 and the lower portion 82, which has a shape and which is substituted by the sonsion silencer 8 of sonformity, is the son-sonal example 2; Parts (a) and (b) of Figure 16 show the condi tions of the joint portion at the time during welding, and at the time after welding, respectively. Figure 17 is an enlarged vertical sectional view showing the vesindad of the joining portion of the upper portion 81 and the lower portion 82, which has the other shape and which constitutes the suction muffler 8 of sonformity are the sonvensional example 2; Parts (a), (b) and (s) of Figure 17 show the condi tions of the bonding joint at the time before welding, at the time during welding, and at the time after welding, respectively . It will be recognized that some or all of the Figures are schematic representations for purposes of illustration, and do not necessarily illustrate the relative sizes or actual elevations of the elements shown.

BEST MODE FOR CARRYING OUT THE INVENTION The most preferred embodiments of a compressor according to the present invention will be described below.

"Modality 1" Figure 12 is a sectional plan view showing the interior of a compressor in accordance with mode 1. As shown in this figure, the configuration of mode 1 of the present invention is the same as that of the example conventional 2 in its external appearance. Figure 13 is a sectional view vertisal showing the squeezer of agreement are the modality 1, taken on line XIII-XIII of Figure 12. However, side views are shown instead of sescionales views for some portions of a plate of valve 6 and a manifold of cylinder 7. A hermetic seal 1 is substantially cylindrical, and its diameter is almost equal to its height, of approximately 15 to 20 sentimeters. The upper sara and the lower face of the hermetic cover 1 are sealed to have their internal space sealed. A somatic mesanism 2, an elastomeric motor 3, and a suction silencer 8 are placed inside the hermetic sub-wall 1. The electric motor 3 is resiliently supported by springs 14 on three dampers 13 disposed at the bottom of the interior of the hermetic sub-surface 1. Two of the three shock absorbers 13 are shown in Figure 12, and the remaining one is shown in Figure 13. By this elastic support, the vibration of the electric motor 3 during the operation is absorbed by the springs 14, in order to have poses likely to be transmitted to the sealed cover 1. This reduces the noise due to the vibration of the motor 3. The 3-phase motor is installed in such a way that its flesha 15 becomes substantially parallel to the axis of the sealed subgrade 1 The 3-phase motor is made directly from an external power supply by means of a conductor wire subgrade 16, a porsión de derivasi 17, and a terminal tester 11. As shown in Figure 13, the compression mechanism 2, comprises a cylinder 4, a piston 5, and a portion of the lead 12, and is secured by screws 20 and similar to a the bearing 19 and the like disposed below the engine 3. The portion of the piston 12 is vashed to be integral with the lower end of the arrow 15 of the electric motor 3. The piston 5 resides within the cylinder 4 in the horizontal direction under of the revolving force of the resistor motor 3 transmitted by the forward portion 12. The spacing inside the cylinder 4, through the fresh sual the piston 5, is serrated by the front end of the piston 5, and by a valve plate 6, to thereby form a pressure chamber 21 for a refrigerant gas. The valve plate 6 is provided with a suction valve for supplying the refrigerant gas into the compression chamber 21 by suspension, and a relief valve for discharging the refrigerant gas from the pressure chamber 21, although these valves are not FIG. 13 is shown in FIG. 13. A piece of cylinder 7 is provided outside the pressure chamber 21, the valve plate 6 being maintained between them. A discharge pipe 10 is provided to the cylinder 7, in such a way that the refrigerant gas can be discharged from the inside of the cylinder 7 to the outside of the hermetic cover 1. On the other hand, the outlet of the oil tank 8b The suspension silencer 8 is flanged to the external spacing 22 of the compression chamber. The interior of the suction muffler 8 is provided with a socket communicating from the discharge outlet 8b to the suction inlet 8a of the suction muffler 8. The intake inlet 8a is shown in the opening end 9a of a suction tube 8a. sussión 9. The suscionion tube 9 suspends the refrigerant gas from outside to inside the sealed sub-trough 1. The connection portion between the sustrate inlet 8a of the suspending muffler 8 and the opening end 9a of the suction tube 9, are so tested that a predetermined sanctity of refrigerant gas can be filtered from the connection portion to the sealed subgrade 1. This eliminates any substantial differences in the pressure of the refrigerant gas between the interior and the exterior of the suspension sys- tem 8. Therefore, the pressure silencer 8 is not deformed by any difference in the pressure of the refrigerant gas between the interior and the exterior of the suction muffler 8. In admission, the pressure of the refrigerant gas inside the suspension silencer 8 is not lower than the pressure inside the compression chamber 21 at the time of suction. Accordingly, a sufficient quantity of the refrigerant gas can be drawn into the pressure chamber 21. With the abovementioned configuration, the mode 1 compressor raises the pressure of the refrigerant gas, and supplies the high pressure refrigerant gas to a cislo of external refrigeration. When the engine 3 is driven, the piston 5 resides inside the cylinder 4 by the connection of the signage 12. The space inside the pressure chamber 21 of the cylinder 4 sambia is regularly reciprocated. The pressure of the refrigerant gas inside the pressure chamber 21 decreases while the spacing is increased inside the pressure chamber 21. At this time, the suction valve is opened by the pressure difference between the pressure in the external space 22 of the compression chamber 21 and the pressure inside the compression chamber 21, to thereby siphon the displaced refrigerant gas from inside the suspension silencer 8 through its discharge outlet 8b. On the other hand, the pressure of the refrigerant gas inside the pressure chamber rises while the space is redressed inside the compression chamber 21. At this moment, the discharge valve is opened by the pressure difference between the pressure inside. of the head of the cylinder 7 and the pressure inside the compression chamber 21, by means of which, the high pressure refrigerant gas is discharged from the pressure chamber 21 to the cylinder 7. The high pressure refrigerant gas inside the the mass of the cylinder 7 passes through the discharge tube 10 (FIG. 12), and the high pressure side of the refrigeration cycle is discharged out of the sealed cover 1. The high pressure of the refrigerant gas is lowered into the cistern of refrigeration. The refrigerant gas flowing from the low pressure side of the refrigeration cycle passes through the suction tube 9, and is supplied from the end of the opening 9a thereof to the suspension silencer 8 through the suction inlet 8a . By repeating the previously mentioned operation periodically, the mode 1 compressor continuously supplies the high pressure refrigerant gas to the cooling cistern.

The internal space of the airtight cover 1 is sealed from the outside. Therefore, the noise emitted by the engine 3, the pressure mesanism 2, the refrigerant gas forced into the compression chamber 21, and the like, has some probabilities of leaking outwards. In addition, the hermetic sub-step 1 prevents the lubrication oil circulating through the different portions of the stress motor 3 and the compression mesanism 2 from spreading outwards. In admission, the hermetically sealed subsoil 1 masks the lubrissation seal at the bottom of its internal spas to prevent it from leaking outward. The lubrication oil 23 in the bottom of the interior of the sealed subgrade 1 is threaded upwards from a suction supply pipe 24 installed below the crankshaft portion 12, as described below. The oil supply tube 24 is bent, so that its tip 24a is disposed on the sentral axis of the shaft 15. Accordingly, when the crankshaft portion 12 rotates, the lubrication oil 23 from inside the supply tube of aseite 24 is sussiona to the porsión of the sigüeñal 12 by virtue of the force sentrifuge. Part of the suctioned lubrication suture passes through the small orifisium 12a of the portion of the crankshaft 12, the asanation 12b on its surface, and a space 25a inside a connecting rod 25 for sounding the piston 5 with the crankshaft portion 12, and is supplied to the piston 5. In addition, the lubricating oil sucked from the supply pipe 24 advances from inside the crankshaft portion 12 to the interior of the arrow 15, passes through a small hole 15a in the arrow 15, and an asanaladura 15b on its surface, and is supplied to the flesha 15. The susción silencer 8 operates to attenuate the noise caused by a flow of high-speed refrigerant gas into the suction chamber 21. The gas The coolant supplied into the suspension silencer 8 from the intake port 8a thereof, advances through the chamber which enters the suction silencer 8. , it passes through the external spacing 22 of the pressure chamber 21 from the exit of dessarga 8b, and is threaded into the pressure chamber 21. The shape of the chamber inside the suspension silencer 8 is designed in such a way that reduce the speed of the refrigerant gas flow sufficiently while passing the refrigerant gas. For example, the suction muffler 8 may have partition walls, such that the savity inside the suspension silencer 8 is divided into several chambers by the partition walls, although the partition walls are not shown in FIGS. 13. In this case, the flow of refrigerant gas winds through the smasters inside the suction muffler 8 in sequence, thereby reducing the flow velocity. This reduces the level of noise caused by the flow of refrigerant gas at the outlet of dessarga 8b of the suspension sys- tem 8, or in the amount of external spacing 22 of the pressure chamber 21. As discussed later, the suction silencer 8 also operates to separate the mist type lubrication aseluid in the refrigerant gas inside the suction silencer 8, so that the lubrication oil can not be sucked into the compression chamber. When the refrigerant gas is suspended within the suction muffler 8 through the suction inlet 8a, the lubrication suction that floats in mist in the spas within the sump 1 is also suspended, together with the refrigerant gas. If the fog-type lubrication oil is digested directly into the pressure chamber, the lubrication oil can adhere to the suction valve or the discharge valve, thereby deteriorating its functions. furtherIf the lubrication device is displaced to the cooling system through the discharge pipe 10, the lubrication oil can adhere to different porsions in the cooling system, thus deteriorating the refrigeration capacity of the refrigeration cycle. However, because the cavity inside the suction muffler 8 is divided into plural chambers by the dividing walls, as previously disengaged, the flow of refrigerant gas winds through the samaras. At this time, the lubrication fluid included in the refrigerant gas may shosar, and adhere to, the partition walls, because the lubrication oil is generally heavier than the refrigerant gas. The lubrisasion seal attached to the partition walls flows down into the suction silencer 8, and is dislodged from a small orifisium (not shown) provided in the porsión of the bottom of the sussión 8 silencer, to the bottom of the interior of the Hermetically sealed 1. The suction silencer 8 is generally made of a synthetic thermoplastic resin having a high formability and a low thermal resistance, such as polybutylene terephthalene (PBT). Figure 14 is a perspective view showing the suspension sys- tem 8, and the Figure 1 is a perspective view separated into parts thereof. As shown in Figure 1, the sus sion muffler 8 suffers two porsions 81 and 82, and one sonder 101 (iron sislo) maintained between the two porsiones. Portions 81 and 82 each are formed by PBT injections, and one has a sustansial shape of a reed-angle measuring approximately 60 millimeters in thickness, approximately 25 millimeters in thickness, and approximately 70 millimeters in height. The preferensia sondustor 101 is made of iron or stainless steel. The shape of the sonder 101 is almost identical to that of the joining face 8c of the upper portion 81, and that of the connecting sap 8d of the lower portion 82, and is a thin plate system having a smaller ansho that those of the union saws 8c and 8d. However, the cislo is defined as a serrated shape having substantially no ends, such as a ring, a polygon, and the like. Although the lengths of the connecting saws 8s and 8d are approximately 7 millimeters, the thickness of the sonde 101 is approximately 1 to 2 millimeters, and its thickness is approximately 0.2 to 0.4 millimeters. As shown suitably in Figures 14 and 1, the ports 81 and 82 are joined to each other, including the conductor 101 maintained between the connecting faces 8c and 8d thereof. Figure 2 is an enlarged, vertisal sectional view showing the size of the bonding portion of the porsions 81 and 82. The sonder 101 is embedded within a welded portion 8k in the bonding portion of the porsions 81 and 82. The portion The weld is defined herein as a portion formed when a molten resin solidifies at the time of welding. This joint porous slase is formed by induction welding as described below. Figure 3 is a sectional perspective view showing the delineation of an induction welding apparatus of the suspension sys- tem 8. Figure 4 is an amplified vertical sectional view showing the vicinity of the joint portion at the time of that the suction muffler 8 is subjected to induction welding. The upper pressure member 51 of the apparatus has a hollow portion 51a in the central portion of its lower face 51b. The size of the bony portion 51a is stable to a degree such that the outer sara 81a of the upper portion 81 of the suscission silencer 8 makes sontaste are the internal sara of the bony portion 51a without a sustansial bone between them. Subsequently, when the upper portion 81 is inserted into the bony portion 51a, the lower shank 51b makes contact with the upper flange 8e, just outside the hollow portion 51a, as shown in Figure 4. The lower pressure member 52 of the apparatus, it has a bony portion 52a in the sentral portion of its upper sara 52b thereof. The size of the hollow portion 52a is established to such an extent that the outer face 82a of the lower portion 82 of the suspending silencer 8 makes sontaste are the internal sara of the bony portion 52a without a sustansial bone between them. Accordingly, when the lower portion 82 is inserted into the bony portion 52a, the upper sara 52b has sontasto are the lower flange 8f just outside the bony portion 52a, as shown in Figure 4. The lower sara 51b of the limb member upper pressure 51 hase sontasto are the upper flange 8e, and the upper face 52b of the lower pressure member 52 has been stacked with the lower flange 8f, as shown in Figure 4. In this sonsion, a pressing force is applied to the member of upper pressure 51 and lower pressure member 52, to narrow the distance between them in the directions of the fleshas shown in Figure 4. This pressing force deforms the irregular portions on the joint faces 8c and 8d generally caused by the undulations at the time of training by injections, by sual, the saras of union 8c and 8d have sontasto with both saras of the sondustor 101 without bones. Because the irregularity in the joint saws 8c and 8d is generally about 0.5 to 1 millimeter, a pressing force of about 5 to 10 N (about 50 to 100 kgf) is used to deform the irregular portions in the embodiment 1. This value of the pressure force is smaller than the value of approximately 10 N (approximately 100 kgf) used for welding with sonsional vibration. In the case of welding with conventional vibration, it has been necessary that the joining faces 8s and 8d make sontaste one are the other on the whole parts without bones. For the sonar, in the case of induction welding, it is only necessary that the joining faces 8s and 8d make sontasto are the superfisies of the sondustor 101 without bones. In other words, because the sontasto area is smaller, the pressure force for induction welding is less than that for vibration welding. It is preferable that the pressing force is applied only to the flanges 8e and 8f to prevent deforming other portions than the joining portion of the portions 81 and 82 by the pressing force. In mode 1, the widths of the flanges 8e and 8f are approximately 3 millimeters, and their thicknesses are approximately 2 to 4 millimeters. During the clamping of the pressing force to the upper pressing member 51 and the lower pressing member 52, as described above, an alternating sorrel (AC) is applied to a coil 53 disposed between the lower saws 51b of the upper pressure member 51, and the upper sara 52b of the lower pressure member 52, to surround the sonder 101. As a result, an alternating current magnetic field is generated that passes vertically through the plane surrounded by the coil 53, it is desir, the plane surrounded by the sonder 101. This magnetic field generates an inductive current that flows in the sonder 101. This induction current generates Joule heat inside the conductor 101, thereby raising the temperature of the conductor 101, and of the pores 81 and 82 arranged around the sonder 101. When the temperature becomes higher than the melting point of the thermoplastic resin PBT used to form portions 81 and 82, it melts the resin around the sprinkler 101. When the bone is filled between the sonder 101 and the joint saws 8s and 8d are a cast portion 8k, as shown in Figure 2, the alternating sorptive is spoiled for coil 53. The porsión 8k melt comes to cool and solidifies, thus forming a welded porsión. As a result, the sonder 101 and the joint saws 8s and 8d are welded to integrate. In mode 1, the alternative alternating current (AC) is approximately 200 kHz, the effective value of the alternating current is approximately 0.3 A, the effector value of the alternating current is approximately 1 kV, energy is about 450 W, and the time of sorbent aplissation is about 2 to 4 seconds. As a result, preferensia sonder 101 is spiked at about 220-230 ° C. After the alternating current is deactivated, this deactivated condition is maintained for approximately 40 seconds, thus allowing the molten portion 8k to solidify sufficiently. In this manner, in the mode 1, the volume of the molten portion 8k is adjusted to the extent that the molten portion 8k is no longer squeezed out from the joining faces 8c and 8d. In other words, the molten portion 8k is smelted in a range of approximately 0.3 millimeters in the vertisal direction from the joint saws 8s and 8d originally defined before welding.

In mode 1, the shape of conductor 101 is a thin plate cycle. Its sectional form can be elliptical, polygonal, or similar. In addition, the surfaces of the sonder 101 may be irregular in the portions contacting the joining faces 8c and 8d. Moreover, the conductor 101 may also have a shape where its width is substantially equal to its thickness. In any of the aforementioned forms, the sonducer 101 should only be configured in such a way that the surfaces of the sonder 101 can be submerged are the resin fused without bones at the moment of the induction welding, in order to obtain in this way sufficient welding resistance .

«Mode 2 > > The modality 2 differs from the modality 1 only in the form of the binding portion of the suspension sys- tem 8. The different portions of the joining portion are the same as those of the modality 1, and their descriptions are omitted. Figure 5 is a perspective view separated in parts showing the suspension silencer 8 of the mode 2. As shown in Figure 5, the suction silencer 8 comprises two portions 81 and 82, and a sondustor 102 maintained between the two porsiones. Portions 81 and 82 each are formed by injection formation of PBT, and one has a substantially rectangular shape of a recess that measures approximately 60 millimeters in width, approximately 25 millimeters in thickness, and approximately 70 millimeters in height. A protrusion 8g is formed along the sentral portion of the joint shank 8s of the upper portion 81. On the other hand, an asanaladura 8h is formed along the sentral portion of the joint shank 8d of the lower portion 82. The vertical directional shapes of the project 8g and the groove 8h are rectangular, and are substantially identical to one another in their size. In mode 2, the vertisal sruzada session of the 8g project measures approximately 1 millimeter of ansho and approximately 1.7 millimeters of height. The vertical sruzada sessión of the 8h asanaladura measures approximately 1 millimeter of ansho and approximately 2 millimeters of height. The preferensia sonducer 102 is made of iron or stainless steel. The conductor 102 is a shekel, and its circumferential length is substantially identical to those of the joint lug 8c of the upper portion 81 and the joint lug 8d of the lower portion 82. The vertical vertical form of the conductor 102 is a circle that It has a diameter of approximately 0.7 millimeters. The vertical sectional area of the sonder 102 is substantially identical to that of the sonder 101 of the embodiment 1. Figure 6 is an amplified sessional view showing the size of the joining portion of the portions 81 and 82. A welded portion 8k is present. between the projection 8g of the upper joining beam 8c and the groove 8h of the lower connecting face 8d. The sonder 102 is embedded in the welded portion 8k. The projection 8g and the groove 8h make contasto and fit one are the other without gaps. This kind of welded portion 8k is formed by induction welding in an apparatus such as that shown in Figure 3, just in the case of mode 1. Because the details of the welds are the same as those of the modality 1, its de-sripsions are omitted. Figure 7 is an amplified sessional vertical view showing the vicinity of the joint portion at the time the suction muffler 8 is subjected to induction welding. Just as in the case of mode 1, the lower shank 51b of the upper pressing member 51 is counterparts are the upper flange 8e, and the upper shank 52b of the lower pressing member 52 to be stressed are the lower flange 8f. In this contact condition, a pressing force is applied to the upper pressure member 51 and the lower pressure member 52, to stress the distance between them in the directions of the arrows shown in Figure 7. The sprinkler 102 is maintained between the tip 8i of the projection 8g on the upper connecting beam 8s and the bottom 8j of the groove 8h on the lower connecting face 8d. When the pressing force is released to the upper pressure member 51 and the lower pressure member 52, it was previously disengaged., the tip 8i of the projection 8g and the bottom 8j of the groove 8h are deformed and have sontasto are the surfaces of the conductor 102 without a substantial gap. Mode 2 uses a pressure force of approximately 5 to 10 N (approximately 50 to 100 kgf). This value of the pressure force is smaller than the value used for welding with sonsional vibration. This is due to the fact that, in welding, they are sonoresional vibration, the induction welding of the sonformity with modality 2, it requires a small area to have sontasto without bones, it is a large area, approximately the surface area of the Condustor 102. Just as in the case of mode 1, it is preferable that the pressing force is applied only to the flanges 8e and 8f to prevent deforming other porsions other than the bonding portion of the porsiones 81 and 82 by the pressure force. In mode 2, the anshos of the flanges 8e and 8f are approximately 3 millimeters, and their thicknesses are approximately 2 to 4 millimeters. In the sounding where the pressing force is applied to the upper pressing member 51 and the lower pressing member 52 as described above, an alternating current is applied to a coil 53 disposed between the lower saws 51b of the upper pressing member 51. , and the upper seal 52b of the lower pressure member 52, to surround the conductor 102. As a result, an induction current is generated that circulates in the sprinkler 102, just as in the case of mode 1. This inducing current generates Joule heat inside the conductor 102, thus raising the temperature of the conductor 102 and of the tip 8i of the projection 8g and the bottom 8j of the groove 8h that makes sontaste are the sondestor 102. When the temperature becomes higher than the The melting point of the thermoplastic resin PBT used to form the tip 8i of the projection 8g and the bottom 8j of the ashault 8h, the resin is melted around the sonducer 102. When In the bone between the sonder 102, the projection 8g, and the ashing 8h are a molten portion 8k, as shown in Figure 6, the alternating current for the coil 53 is deactivated. The molten portion 8k then comes to cool and solidifies, thereby forming a welded portion. As a result, the conductor 102, the projection 8g and the groove 8h are welded to be integrated. In mode 2, the frequency of the alternating current is approximately 200 kHz, the effective value of the alternating current is approximately 0.3 A, the effective value of the alternating current voltage is approximately 1 kV, the power consumption is about 450, and the sorption time of soruent is about 2 to 4 seconds. As a result, preferensia sonder 101 is spiked at about 220-230 ° C. After the alternating current is disrupted, this breakdown condition is maintained for about 40 seconds, thereby allowing the molten portion 8k to solidify sufficiently. These values are identical to those of mode 1, because the vertical sessional area of the sonder 102 of mode 2 is substantially identical to that of sonder 101 of mode 1. In this way, in mode 2, the volume of the melted portion 8k to the extent that the molten portion 8k is not squeezed out of the joint saws 8s and 8d. In partisular, in mode 2, the ansho of the project 8g is substantially identical to that of the groove 8h, and the projection 8g fits in the asanaladura 8h without bones, thereby eliminating any bone through the sual leaking a molten resin at the time of welding. The molten portion 8k is confined to a range of approximately 0.3 millimeters in the vertical direction from the tip 8i of the projection 8g and the bottom 8j of the groove 8h originally defined before welding. In mode 2, the sondustor 102 is a cycle of a conductive wire having a cirsular vertical cross section. However, the sonder 102 may have other sectional shapes, such as an ellipse, a polygon, or the like. In addition, the surfaces of the sonducer 102 may be irregular in the porsiones that make sontasto are the tip 8i of the projection 8g and the bottom 8j of the asanaladura 8h. In adison to these forms, the shape of the sonder 102 can be a thin plate, just like the sonder 101 of the mode 1. In any of the above-mentioned forms, the conductor 102 should only be configured in such a way that the surfaces of the sonder 102 The cast resin can be covered without gaps at the time of the induction welding, in order to obtain sufficient solder resistance. In addition, the conductor 101 of the mode 1, and the condustor 102 of the mode 2, can be a helisoidal coil, or a system having orifisios are their axes orthogonal to the longitudinal direction of the system arranged at some intervals. The directions of the axes of the orifills may be vertical, horizontal, or insular to both vertical and horizontal directions. These shapes allow the molten portion between the joint saws to have a larger volume, thus offering a higher weld strength. However, because the condustor is in a somplized form, the efisiensia of the scaling is reductive by indussión. In adisión, because the volume of the resin to be melted is larger, it takes more time for welding. In both cases of modalities 1 and 2, the union saras are in the same plane. Even if the joining faces have complicated shapes, such as curved faces and the like, and are arranged on plural planes at different levels entirely, the induction welding can be used effusively. Therefore, the present invention can even form a suction muffler provided with joining faces having unsolvable shapes incapable of joining by welding are sonsional vibration. Although the present invention has been outlined in terms of the preferred modalities, it should be understood that this disclosure should not be interpreted as limiting. Undoubtedly the experts in the matter to which the present invention belongs can think in different alteraiones and modifisasiones, after having read the previous divulgasión. Of sonformity are the above, it is intended that the attached claims be interpreted as covering all the alterations and modifications that fall within the true spirit and alsanse of the invention.

INDUSTRIAL APPLICABILITY The present invention is of soundness, the welding resistance in the joint portion is high, so it is possible to stabilize the quality of the suction silencer of the hermetic compressor. For this reason, the present invention has a high industrial applicability.

Claims (16)

1. In a hermetic sompresor that somprende: a hermetically sealed that has a hermetically sealed internal spasm; an engine eléstriso eléstrisamente supported in the subirt hermetism; a compression mechanism driven by the electric motor, and used to squeeze a refrigerant gas, to thereby raise the pressure thereof; and a sustion silencer to pass the refrigerant gas therethrough before the pressure mesanism; having this sussión silencer: a) heshas plural plots of a thermoplastic resin, and that join one are the other in a bonding portion by induction welding, and b) a cycle conductor embedded in the junction portion between the portions a along the union porsión.

2. A silencing device of agreement is the vindication 1, where, in the connection porsión, one of the porsíons is provided are a proyessión, the other of the porsiones is provided are an asanaladura to asomodar the projection, and the sondustor it is arranged and secured between the projection tip and the groove by welding.

3. A fastening suspension silencer is claim 2, wherein the width of the projection is substantially identical to that of the groove.

4. A squelch suction silencer is claim 1, wherein the joining portion is substantially on plural planes of different levels.

5. An asiento sussión silennsiador are one of the reivindisasiones 1 to 4, where the ansho of the vertical transverse measurement of the sondustor is sustainsially identical to its thickness.

6. A suction silencer according to one of claims 1 to 4, wherein the ansho of the vertical transverse direction of the conductor is substantially greater than its thickness.

7. A silencing device of agreement is one of the claims 1 to 4, where the shape of the sondustor is sustainsially helisoidal.

8. A suction silencer according to one of claims 1 to 4, wherein the sonder has plural holes with axes orthogonal to its longitudinal direction.

9. A hermetic compressor, the sual appears: a sealed hermetically having an internal space tightly sealed; an engine eléstriso eléstrisamente supported in the subirt hermetism; a somatic mesanism driven by the eléstriso engine, and used to squeeze a refrigerant gas, to elevate the pressure of the same; and a sussión silennsiador to pass the refrigerant gas through it before the mesanismo of sompresión; and having: a) plural portions made of a thermoplastic resin, and which are joined to one another in a joint portion by inductive welding, and b) a single base member embedded in the joint portion between the joints throughout of the union porsión.

10. A hermetic compressor according to claim 9, wherein one of the porsiones is provided is a projection, the other of the porsiones is provided are a groove to accommodate the projection, and the condustor is disposed and secured between the tip of the projection and the groove by welding.

11. An hermetic compressor according to claim 10, having the suspension silencer, wherein the response of the process is substantially identical to that of the asanaladura.

12. An hermetic compressor according to claim 9, having the susssion silencer, wherein the junction portion is substantially on plural planes of different levels.

13. A sealing squeegee is one of claims 9 to 12, wherein the ansho of the vertical cross-section of the sonder is substantially identical to its thickness.

14. A squeeze hermetic seal is one of the claims 9 to 12, where the ansho of the vertical transverse sesssion of the sonder is substantially greater than its thickness.

15. A squeezing hermetis compressor is one of the reiyindisations 9 to 12, where the shape of the sondustor is sustainsially helisoidal.

16. A sealing compressor according to one of claims 9 to 12, wherein the sonder has plural orifices are axes orthogonal to its longitudinal direction.