JP5617805B2 - Compressor, method for manufacturing the compressor, and jig used for manufacturing the compressor - Google Patents

Description

  The present invention relates to a compressor, a method for manufacturing the compressor, and a jig used for manufacturing the compressor.

Conventionally, a compressor has been provided with a circular connection pipe connected to a compression chamber of a compression unit disposed in a sealed container. For example, in a high-pressure shell type compressor in which the inside of a hermetic container has a discharge pressure, a connection pipe that connects the low-pressure side of the refrigeration cycle circuit and the compression chamber is provided through the hermetic container. Further, for example, in a low-pressure shell type compressor in which the inside of the sealed container has a suction pressure, a connection pipe that connects the high-pressure side of the refrigeration cycle circuit and the compression chamber is provided through the sealed container. Further, for example, in a multi-stage compressor that sequentially compresses refrigerant with a plurality of compression units, the compression chambers of the low-stage compression unit and the compression chambers of the high-stage compression unit are connected by a connection pipe. In such a connection pipe, a part is arranged outside the sealed container, and both ends penetrate the sealed container to connect the compression chamber of the lower stage compression section and the compression chamber of the higher stage compression section. There is.
A portion protruding from the closed container of the connection pipe passing through such a closed container is inserted into and supported by a cylindrical support pipe provided on the outer surface side of the closed container. One end of the support pipe is inserted into an insertion portion formed on the outer peripheral side of the sealed container, and both are brazed and joined. Further, the connection pipe and the support pipe are also joined by brazing.

  In addition, as a technique for fixing both of the tubular members inserted into the other one, for example, “consisting of a plurality of collet portions 12 and a plurality of concave and convex strip portions 13 formed at the tip of the collet portion. A crimping jig 10 composed of a collet-shaped pressing tool 1, a rod base 21 and a taper rod 2 comprising a taper rod 22 inserted into the collet part, and a screw-in fitting 5 that can be rotated at the head, The metal fitting 4 is provided with a concave-convex tube 6 and a connection metal fitting 20 into which the end of the opening is fitted, and the concave-convex strip 13 at the tip of the collet portion 12 of the caulking jig 10 is connected to the cylindrical metal fitting 4 of the connection metal fitting 20. In other words, the taper rod 2 is moved to expand the collet portion 12 to connect the concavo-convex tube 6 to the connection fitting 20 by the internal caulking force (Patent Document 1). reference)

Japanese Patent Laid-Open No. 7-251228 (summary, FIG. 4)

  For example, when an attempt is made to share a hermetic container in compressors having different capacities, in a compressor having a small capacity, it is conceivable to reduce the thickness of the compression portion in order to reduce the volume of the compression chamber. In addition, for example, when the compressor is downsized in the thickness direction of the compression unit, it is conceivable to reduce the thickness of the compression unit. In this way, when the thickness of the compression part is reduced, when the connection pipe is connected to the compression chamber from the side surface side of the compression part, the diameter of the circular connection pipe decreases according to the thickness of the compression part. This reduces the flow rate of the refrigerant flowing through. For this reason, when the thickness of the compression part is reduced, it is conceivable to use a flat connection pipe in order to prevent a decrease in the flow rate of the refrigerant flowing through the compression chamber. In this case, the support pipe that supports the flat connection pipe also has a flat shape.

  For example, it is conceivable to use a flat connection pipe for the compressor for the above reasons, but when a flat connection pipe is used, there is no conventional compressor using a circular connection pipe. The following problems occur.

  When brazing and connecting a conventional circular support pipe to the insertion portion, the brazing material that has permeated between the support pipe and the insertion portion spreads approximately uniformly between the two due to capillary action. For this reason, when brazing a conventional circular tubular support pipe to the insertion portion, the support pipe is positioned in the insertion portion during the brazing process. Further, the cylindrical support pipe did not need to consider the inclination in the rotation direction around the pipe axis.

  However, when a flat support pipe is brazed to the insertion portion, the brazing material that has permeated between the support pipe and the insertion portion does not spread substantially uniformly between the two. For this reason, when a flat support pipe is brazed to the insertion part, the support pipe cannot be positioned in the insertion part in the brazing process, and the flat support pipe rotates in the rotation direction about the tube axis. Will tilt from the desired posture. For this reason, when trying to connect the connection pipe to the compression chamber through the support pipe, the connection pipe also tilts following the support pipe, and there is a problem that the connection pipe cannot be connected to the compression chamber.

  At this time, it is also conceivable to position the flat support pipe in the insertion portion by the fixing technique disclosed in Patent Document 1. However, in the fixing technique described in Patent Document 1, since the support pipe is fixed to the insertion portion by the protrusion formed on the entire outer peripheral portion of the support pipe, a clearance for allowing the brazing material to penetrate between the two is provided. There was a problem that could not be formed.

  The present invention has been made in order to solve the above-described problems. A flat support pipe can be positioned in the insertion portion, and a clearance can be formed between the support pipe and the insertion portion. It is an object of the present invention to provide a compressor, a method for manufacturing the compressor, and a jig used for manufacturing the compressor.

A compressor according to the present invention includes a sealed container, a compression unit that is accommodated in the sealed container and compresses a refrigerant in a compression chamber, and passes through the sealed container, and is connected to the compression chamber of the compression unit and has an outer peripheral surface. A connection pipe having a flat shape, and a support pipe provided on the outer surface side of the sealed container and supporting the connection pipe inserted inside, and having a flat shape on the inner peripheral surface and the outer peripheral surface. provided, on the outer surface side of the closed container is formed with the insertion portion to which the support pipe shape of the inner peripheral surface is flattened shape is inserted, the support pipe has a plurality of projections formed on the outer peripheral surface The portion is positioned by protrudingly contacting the inner peripheral surface of the insertion portion , and the outer peripheral surface of the support pipe and the inner peripheral surface of the insertion portion are brazed and joined.

In the compressor manufacturing method according to the present invention, the support pipe is inserted into the insertion portion, and the support pipe is expanded with a jig having a plurality of protrusions formed on an outer peripheral surface thereof. a step of突接a convex portion formed on the inner peripheral surface of the insertion portion, wax and infiltrated braze clearance which is formed between the outer surface and the insertion portion inner peripheral surface of the support pipe Attaching the insertion portion and the support pipe, inserting the connection pipe into the support pipe, connecting the connection pipe to the compression chamber, and connecting the connection pipe and the support pipe. And a step of attaching.

Further, the jig used for manufacturing the compressor according to the present invention is a jig used for expanding the support pipe of the compressor according to the present invention, wherein a through hole is formed in the center portion and the outer peripheral surface is the above-described outer surface. It has a flat shape corresponding to the inner peripheral surface of the support pipe, and includes a collet portion that is divided into at least three parts, and a taper rod that is inserted into a through hole of the collet portion and expands the collet portion. , the collet portion, said at a position axisymmetric to the center axis of the through hole has at least two protrusions are formed, the planar outer peripheral surface of the collet from the opposite direction to the insertion direction of the taper rod Only a part of the shape of the outer peripheral surface when viewed is a convex shape corresponding to the convex portion .

  In the present invention, the support pipe is positioned in the insertion part by forming a convex part on the outer peripheral part of the support pipe and causing the convex part to protrude from the insertion part. For this reason, this invention can position support piping within an insertion part, forming clearance between support piping and insertion part. Therefore, when the connection pipe is to be connected to the compression chamber through the support pipe, the connection pipe is not inclined, so that the connection pipe can be connected to the compression chamber satisfactorily.

It is a longitudinal section showing a compressor concerning an embodiment of the invention. It is AA sectional drawing of FIG. It is explanatory drawing which shows the ring and flat tube of the compressor which concern on embodiment of this invention. It is explanatory drawing for demonstrating the relationship between the airtight container and ring in the compressor which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the relationship between the ring and airtight container which employ | adopted the shape of the conventional ring-shaped projection part. It is explanatory drawing for demonstrating the jig | tool for expanding the flat tube (support piping) of the compressor which concerns on embodiment of this invention. It is explanatory drawing for demonstrating the process of positioning the flat tube (support piping) of the compressor which concerns on embodiment of this invention to a ring. It is explanatory drawing which shows another example of the jig | tool for expanding the flat tube (support piping) of the compressor which concerns on embodiment of this invention. It is explanatory drawing which shows another example of the jig | tool for expanding the flat tube (support piping) of the compressor which concerns on embodiment of this invention. It is explanatory drawing which shows another example of the jig | tool for expanding the flat tube (support piping) of the compressor which concerns on embodiment of this invention. It is explanatory drawing which shows another example of the jig | tool for expanding the flat tube (support piping) of the compressor which concerns on embodiment of this invention.

Embodiment.
FIG. 1 is a longitudinal sectional view showing a compressor according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG.
A compressor 50 that is a two-cylinder rotary compressor includes an iron hermetic container 3. The hermetic container 3 is formed in a cylindrical shape having a curved side surface, and includes a compression unit 10, a motor 4 that is a driving source of the compression unit 10, and a driving force of the motor 4. The rotating shaft 1 that transmits to the compression unit 10 is housed and configured.

  The compression part 10 includes a first bearing part 14, a second bearing part 15, a first cylinder 16, a second cylinder 18, an intermediate plate 17, and the like. Specifically, the first cylinder 16 is formed with a substantially cylindrical through-hole that becomes the first cylinder inner diameter 16a. The second cylinder 18 is formed with a substantially cylindrical through-hole that becomes the second cylinder inner diameter 18a. The first cylinder 16 and the second cylinder 18 are stacked in a direction along the inner diameter centers of the first cylinder inner diameter 16a and the second cylinder inner diameter 18a. Moreover, when laminating | stacking the 1st cylinder 16 and the 2nd cylinder 18, the intermediate | middle plate 17 is arrange | positioned among these.

  The 1st bearing part 14 is provided in the upper surface part of the 1st cylinder 16, and obstruct | occludes the upper opening of the through-hole used as the 1st cylinder internal diameter 16a. That is, the through hole of the first cylinder 16 is secured by the first bearing portion 14 and the intermediate plate 17. The second bearing portion 15 is provided on the lower surface portion of the second cylinder 18 and closes the lower opening of the through hole that becomes the second cylinder inner diameter 18a. That is, the through hole of the second cylinder 18 is secured by the second bearing portion 15 and the intermediate plate 17.

  The rotary shaft 1 passes through the first bearing portion 14, the first cylinder 16, the intermediate plate 17, the second cylinder 18, and the second bearing portion 15 that are sequentially stacked. The rotary shaft 1 is rotatably supported by the first bearing portion 14 and the second bearing portion 15. Further, the rotary shaft 1 has a first eccentric portion 1 a formed at a position corresponding to the first cylinder 16, and a second eccentric portion 1 b formed at a position corresponding to the second cylinder 18. The first eccentric portion 1a is provided with a substantially cylindrical first piston 12, and the second eccentric portion 1b is provided with a substantially cylindrical second piston 13.

  These compression parts 10 are fixed in the hermetic container 3 by welding the outer peripheral parts of the first cylinder 16 and the second cylinder 18 to the hermetic container 3. Further, the motor 4 that rotationally drives the rotary shaft 1 of the compression unit 10 is also fixed, for example, by press-fitting or welding its stator to the hermetic container 3.

  As shown in FIG. 2, a vane 19 is slidably provided in the first cylinder 16. When the rotating shaft 1 is rotated by the motor 4, the first piston 12 rotates in the first cylinder 16. At this time, the compression chamber 21 is formed by the vane 19 following the outer peripheral portion of the first piston 12. Similarly, a vane 19 is slidably provided in the second cylinder 18. When the rotating shaft 1 is rotated by the motor 4, the second piston 13 rotates in the second cylinder 18. At this time, the compression chamber 21 is formed by the vane 19 following the outer peripheral portion of the second piston 13.

  A suction hole 20 communicates with the compression chamber 21 formed in the first cylinder 16 and the second cylinder 18. A muffler 32 is connected to these suction holes 20 via a ring 41, a flat tube 42, an extension pipe 43 and a suction pipe 31. The details of the connection configuration between the compression chamber 21 and the muffler 32 will be described later. That is, the refrigerant that has passed through the muffler 32 (that is, refrigerant on the low-pressure side of the refrigeration cycle circuit) is sucked into the compression chamber 21 through the suction hole 20. Then, the refrigerant sucked into the compression chamber 21 is compressed and discharged into the sealed container 3 from valves (not shown) formed on the flange portions of the first bearing portion 14 and the second bearing portion 15. The refrigerant discharged into the sealed container 3 passes between the stator and the rotor of the motor 4 and flows out of the sealed container 3 from the discharge pipe 33.

Next, details of the connection configuration between the compression chamber 21 and the muffler 32, that is, the configurations of the ring 41, the flat tube 42, the extension pipe 43, and the suction pipe 31 will be described.
The flat tube 42 corresponds to the support pipe of the present invention, and the extension pipe 43 corresponds to the connection pipe of the present invention.

FIG. 3 is an explanatory diagram showing a ring and a flat tube of the compressor according to the embodiment of the present invention. FIG. 3B is a plan view of the ring 41 and the flat tube 42 (a view seen from the same direction as FIG. 2). 3A is a view of FIG. 3B viewed from above, and FIG. 3C is a view of FIG. 3B viewed from below.
Hereinafter, the configuration of the ring 41, the flat tube 42, the extension pipe 43, and the suction pipe 31 will be described with reference to FIG. 3 and FIGS.

  The extension pipe 43 is disposed so as to penetrate the hermetic container 3, and the distal end portion thereof is fitted into the suction hole 20 communicating with the compression chamber 21 and connected to the compression chamber 21. The extension pipe 43 is a flat pipe and is provided so that the short axis direction thereof is along the central axis of the sealed container 3 (that is, the rotation axis of the rotary shaft 1). The extension pipe 43 is supported by the flat tube 42, with a portion protruding outside the sealed container 3 inserted into the flat tube 42.

  For example, the flat tube 42 made of copper is one in which one end is inserted into an insertion portion provided on the outer surface side of the sealed container 3 and brazed to the insertion portion. Although this insertion part may be provided directly in the airtight container 3, in this Embodiment, the insertion part 41b whose inner peripheral shape is flat shape is formed in the iron ring 41 which is a welding component, and this insertion part 41b The flat tube 42 is inserted and brazed. This is because the strength of the joined portion of the flat tube 42 is greater when the ring 41 is welded to the sealed container 3 to form the inserted portion 41b than when the inserted portion is formed in the thin sealed container 3. This is because it can be secured. The suction pipe 31 is also inserted into the flat pipe 42 and brazed. Thereby, the compression chamber 21 and the muffler 32 are connected.

  Here, as will be described later in the manufacturing method of the compressor 50, when the extension pipe 43 is fitted into the suction hole 20, the extension pipe 43 is passed through the inside of the flat pipe 42 (in other words, the flat pipe 42 is used as a guide). The extension pipe 43 is inserted into the suction hole 20. For this reason, when the flat tube 42 is brazed to the insertion portion 41b of the ring 41, the positional accuracy of the flat tube 42 becomes important. However, when the flat tube 42, which is a support pipe, is brazed to the insertion portion 41b of the ring 41, the flat tube 42 is inserted into the insertion portion 41b in the brazing process, unlike the case of brazing a circular support pipe. It cannot be positioned.

  That is, when brazing support piping of a tubular shape is joined to the insertion portion, the brazing material that has permeated between the support piping and the insertion portion spreads substantially uniformly between them due to capillary action. For this reason, when brazing and supporting a tubular support pipe to the insertion part, the support pipe was positioned in the insertion part during the brazing process. Further, the cylindrical support pipe did not need to consider the inclination in the rotation direction around the pipe axis. However, when the flat tube 42 is brazed and joined to the insertion portion 41b, the brazing material that has penetrated between the flat tube 42 and the insertion portion 41b does not spread substantially uniformly between the two. For this reason, when the flat tube 42 is brazed and joined to the insertion portion 41b, the flat tube 42 cannot be positioned in the insertion portion 41b in the brazing step, and the flat tube 42 rotates in the rotation direction around the tube axis. Tilt from the desired posture.

  Therefore, in the present embodiment, as shown in FIG. 3, four convex portions 42a are formed on the outer peripheral portion of the flat tube 42, and these convex portions 42a are brought into contact with the inner peripheral surface of the insertion portion 41b. The flat tube 42 is positioned. By positioning the flat tube 42 with such a configuration, a clearance 45 for allowing the brazing material to permeate can be formed between the flat tube 42 and the insertion portion 41b, and poor brazing can also be prevented. .

  As described above, in order to ensure the strength of the joint portion of the flat tube 42, in this embodiment, the insertion portion 41b for brazing and joining the flat tube 42 is formed in the ring 41, and this ring 41 is connected to the hermetic container 3. Welded to the outer surface. Further, the method for welding the ring 41 and the sealed container 3 is not particularly limited, but in the present embodiment, the ring 41 is attached by ring projection welding. In ring projection welding, both can be joined simply by energizing between the ring 41 and the sealed container 3, and the thermal strain of the sealed container 3 is reduced compared to arc welding or the like in which the joint portions of the two are joined sequentially. This is because the ring 41 can be suppressed (that is, the ring 41 can be attached with higher accuracy).

  When the ring 41 is attached by ring projection welding, it is necessary to form a ring-shaped protrusion 41a on the ring 41 that serves as a current concentration portion during ring projection welding. Here, the compressor 50 according to the present embodiment is configured such that the ring 41 is joined to the outer peripheral side (that is, the curved surface portion) of the side surface portion of the sealed container 3. For this reason, the protrusion 41a of the ring 41 is formed in a curved shape having a recessed central portion in a cross section (that is, a cross section) along the long axis direction of the flat tube 42. The reason why the protrusion 41a of the ring 41 is formed in such a shape is as follows.

FIG. 4 is an explanatory diagram for explaining the relationship between the sealed container and the ring in the compressor according to the embodiment of the present invention, and FIG. 4 (a) shows a state before the ring protrusion is brought into contact with the sealed container. FIG. 4B shows a state in which the ring protrusion is brought into contact with the sealed container (that is, a state during welding).
FIG. 5 is an explanatory diagram for explaining the relationship between a ring adopting the shape of a conventional ring-shaped protrusion and a sealed container, and FIG. 5 (a) causes the protrusion of the ring to contact the sealed container. FIG. 5B shows a previous state, and FIG. 5B shows a state where the ring protrusion is brought into contact with the sealed container (that is, a state during welding).

  As shown in FIG. 5, the conventional ring-shaped protrusion 141a has a flat tip shape. For this reason, when the ring 141 is brought into contact with the hermetic container 3 during ring projection welding, a gap L is generated between them. In particular, when the flat tube 42 is brazed and joined to the ring 141 as in the present embodiment, it is necessary to lengthen the ring 141 (that is, the protruding portion 141a) in the long axis direction of the flat tube 42 (the left-right direction in FIG. 5). As a result, the size of the gap L also increases. For this reason, this gap L becomes larger than the amount of penetration at the time of ring projection welding, and the connection between the ring 141 and the sealed container 3 may be poor, and refrigerant leakage may occur.

  On the other hand, in the ring 41 according to the present embodiment, as described above, the ring-shaped protrusion 41a is formed in a curved shape with a recessed central portion. For this reason, as shown in FIG. 4, when the ring 41 is brought into contact with the sealed container 3 during ring projection welding, the gap between the two can be reduced. For this reason, poor joining between the ring 41 and the sealed container 3 can be prevented, and stable welding in which refrigerant leakage does not occur from the joint portion is possible. In the present embodiment, the curved radius of curvature of the tip of the protrusion 41a is formed substantially the same as the radius of curvature of the side surface of the sealed container 3. For this reason, poor bonding between the ring 41 and the sealed container 3 can be further prevented.

(Manufacturing method of the compressor 50)
The compressor 50 configured as described above is manufactured by the following process.

  FIG. 6 is an explanatory diagram for explaining a jig for expanding the flat tube (supporting pipe) of the compressor according to the embodiment of the present invention. Moreover, FIG. 7 is explanatory drawing for demonstrating the process of positioning the flat tube (support piping) of the compressor which concerns on embodiment of this invention to a ring.

  As shown in FIG. 6, the jig 100 includes a collet portion 101 having a through hole formed in the center portion, and a tapered rod 105 inserted into the through hole of the collet portion 101. The collet portion 101 has a flat shape whose outer peripheral surface corresponds to the inner peripheral surface shape of the flat tube 42 and is divided into four parts. Further, four convex portions 101 a are formed on the outer peripheral surface of the collet portion 101 at positions corresponding to the convex portions 42 a formed on the flat tube 42. In FIG. 6, one convex portion 101 a is formed in each of the four collet portions 101. The tapered rod 105 has a tip formed in a tapered shape. When the taper rod 105 is pushed into the through hole of the collet portion 101 by a cylinder or the like, the collet portion 101 is expanded.

  Using this jig 100, first, the flat tube 42 is positioned at the insertion portion 41 b of the ring 41. Specifically, as shown in FIG. 7A, the collet portion 101 of the jig 100 is disposed in the flat tube 42. Then, the taper rod 105 is pushed into the through hole of the collet portion 101 from the flat tube 42 toward the ring 41 to expand the collet portion 101. As a result, as shown in FIG. 7B, the flat tube 42 is also expanded to form convex portions 42a on the outer peripheral portion, and the flat portions 42a are brought into contact with the insertion portion 41b, whereby the flat tube 42 is 41 is positioned in the insertion part 41b. Thereafter, the positioned ring 41 and the flat tube 42 are brazed and joined. At this time, since the clearance 45 is formed between the flat tube 42 and the insertion portion 41b of the ring 41, the brazing material penetrates into the clearance 45, and the ring 41 and the flat tube 42 are well brazed and joined. The

  After the ring 41 and the flat tube 42 are brazed and joined, the ring 41 is entered into the hermetic container 3 by ring projection welding. Specifically, as shown in FIG. 4B, the protrusion 41a of the ring 41 is brought into contact with the outer peripheral side of the side surface of the sealed container 3, and the two are energized to join them together.

  After the ring 41 and the flat tube 42 are joined to the sealed container 3, the compression unit 10 is disposed inside the sealed container 3. And after arrange | positioning the compression part 10 inside the airtight container 3, the extension piping 43 is inserted from the exterior of the airtight container 3 to the inside of the flat tube 42, and the extension piping 43 is inserted in the suction hole 20. FIG. After the extension pipe 43 is fitted into the suction hole 20, the suction pipe 31 is then inserted into the flat pipe 42. Thereafter, the flat tube 42, the extension pipe 43 and the suction pipe 31 are brazed and joined.

  In addition, what is necessary is just to employ | adopt the conventional process for the attachment process of the rotating shaft 1, the motor 4, the muffler 32, the discharge pipe 33, etc. FIG.

  As described above, in the compressor 50 configured as in the present embodiment, the flat tube 42 is formed by forming the convex portion 42a on the outer peripheral portion of the flat tube 42 and projecting the convex portion 42a to the insertion portion 41b. Is positioned in the insertion portion 41b. For this reason, the flat tube 42 can be positioned in the insertion part 41b, forming the clearance 45 which a brazing material osmose | permeates between the flat tube 42 and the insertion part 41b. Therefore, when the extension pipe 43 is inserted into the suction hole 20 through the flat tube 42, the phases of the two do not shift, so that the extension pipe 43 can be fitted into the suction hole 20 satisfactorily.

  Further, in the present embodiment, a ring 41 to be welded and joined to the sealed container 3 is provided, an insertion portion 41b is formed in the ring 41, and a flat tube 42 is inserted into the insertion portion 41b of the ring 41 to be brazed and joined. Yes. For this reason, compared with the case where the flat tube 42 is inserted into the insertion portion directly formed in the thin sealed container 3 and brazed, the strength of the joint portion between the flat tube 42 and the insertion portion can be improved. it can.

  In the present embodiment, the ring 41 is joined to the sealed container 3 by projection welding, and the ring-shaped protrusion 41a of the ring 41 is formed in a curved shape with a recessed central part. In addition, it is possible to prevent welding failure between them and realize stable welding without refrigerant leakage from the joint.

  Note that the compressor 50 described in the present embodiment is merely an example. The compression unit 10 is not limited to the two-cylinder type, and may be a single type. The mechanism of the compression unit 10 is not limited to the rotary type, and various mechanisms such as a scroll type and a screw type can be employed. Of course, a multistage compressor in which a plurality of the compression units 10 are installed and the refrigerant is sequentially compressed may be used.

  Further, the pipe supported by the flat pipe 42 that is the support pipe is not limited to the extension pipe 43. For example, the suction pipe 31 may be directly fitted into the suction hole 20 and the suction pipe 31 may be supported by the flat pipe 42. The pipe supported by the flat tube 42 is not limited to the pipe on the suction side, and may be a pipe that penetrates the sealed container and is connected to the compression chamber. For example, in a low-pressure shell-type compressor in which the inside of a sealed container has a suction pressure, a connecting pipe that connects the high-pressure side of the refrigeration cycle circuit and the compression chamber may be supported by the flat tube 42. Further, for example, a connecting pipe that connects each compression chamber pipe of a multistage compressor may be supported by the flat pipe 42 on the outer surface side of the hermetic container.

  Further, the jig 100 for expanding the flat tube 42 is merely an example. For example, as shown in FIG. 8, the jig 100 may be configured so as to expand the collet portion 101 by drawing the taper rod 105 from the ring 41 toward the flat tube 42. Further, for example, the number of divisions of the collet portion 101 is not limited to four. If the collet portion 101 is divided into at least three as shown in FIG. 9, the flat tube 42 is expanded without breaking the flat shape. can do. Further, for example, the number of projections 101a of the collet part 101 and the number of divisions do not necessarily need to be the same. For example, the number of projections 101a may be different from the number of divisions of the collet part 101 as shown in FIG. Good. For example, as shown in FIG. 11, if at least two convex portions 101a are formed at positions where the central axis of the taper rod 105 is axisymmetric, the flat tube 42 can be positioned by the jig. That is, the flat tube 42 can be positioned in the insertion portion 41b by forming at least two convex portions 42a at positions where the central axis of the flat tube 42 is axially symmetric at the outer peripheral portion of the flat tube 42.

  DESCRIPTION OF SYMBOLS 1 Rotating shaft, 1a 1st eccentric part, 1b 2nd eccentric part, 3 Airtight container, 4 Motor, 10 Compression part, 12 1st piston, 13 2nd piston, 14 1st bearing part, 15 2nd bearing part , 16 1st cylinder, 16a 1st cylinder inside diameter, 17 Intermediate plate, 18 2nd cylinder, 18a 2nd cylinder inside diameter, 19 Vane, 20 Suction hole, 21 Compression chamber, 31 Suction pipe, 32 Muffler, 33 Discharge pipe, 41 Ring, 41a Protruding part, 41b Inserting part, 42 Flat tube, 42a Convex part, 43 Extension pipe, 45 Clearance, 50 Compressor, 100 Jig, 101 Collet part, 101a Convex part, 105 Taper rod, 141 Ring, 141a Protruding part .

Claims (7)

A sealed container;
A compression unit that is housed in the sealed container and compresses the refrigerant in the compression chamber;
A connection pipe that penetrates the sealed container and is connected to the compression chamber of the compression section and has a flat outer peripheral surface shape ;
A support pipe which is provided on the outer surface side of the sealed container and supports the connection pipe inserted inside, and the shape of the inner peripheral surface and the outer peripheral surface is a flat shape ;
With
On the outer surface side of the sealed container, the shape of the inner peripheral surface is a flat shape, and an insertion portion into which the support pipe is inserted is formed,
The support pipe is positioned by a plurality of convex portions formed on the outer peripheral surface projectingly contacting the inner peripheral surface of the insertion portion,
The compressor characterized in that the outer peripheral surface of the support pipe and the inner peripheral surface of the insertion portion are brazed and joined.   2. The compressor according to claim 1, wherein at least two convex portions formed on the support pipe are formed at positions symmetrical with respect to a central axis of the support pipe. Comprising a welded part formed with the insertion portion;
The welded part is welded to the sealed container;
The compressor according to claim 1 or 2, wherein an outer peripheral surface of the support pipe is brazed to an inner peripheral surface of the insertion portion of the welded part. The sealed container is formed in a cylindrical shape with a curved side surface portion,
The connection pipe penetrates the side surface of the sealed container,
The connection pipe and the support pipe, which minor axis direction of its is disposed along the central axis of the closed container,
The welded part is formed with a ring-shaped protrusion on the surface opposite to the side on which the insertion part is formed,
The said protrusion part of the said welded part is formed in the curved shape where the center part by the side of the said airtight container was dented in the cross section along the major axis direction of the said connection piping. Compressor. It is a manufacturing method of the compressor as described in any one of Claims 1-4, Comprising:
The support pipe is inserted into the insertion portion, the support pipe is expanded with a jig having a plurality of protrusions formed on the outer peripheral surface , and the convex portion formed on the support pipe is formed on the inner peripheral surface of the insertion portion. A process of butt contact with,
A step of infiltrating and brazing a brazing material into a clearance formed between an outer peripheral surface of the support pipe and an inner peripheral surface of the insertion part, and joining the insertion part and the support pipe;
Inserting the connection pipe into the support pipe, connecting the connection pipe to the compression chamber, and brazing and joining the connection pipe and the support pipe;
A method for manufacturing a compressor, comprising: It is a manufacturing method of the compressor according to claim 4, Comprising:
The support pipe is inserted into the insertion part of the welded part, the support pipe is expanded with a jig having a plurality of protrusions formed on the outer peripheral surface , and a convex part formed on the support pipe is formed as the insertion part. A step of contacting the inner peripheral surface of the
A step of infiltrating and brazing a brazing material into a clearance formed between the outer peripheral surface of the support pipe and the inner peripheral surface of the insertion portion , and joining the welded part and the support pipe;
The projection of the welded part is pressed against the outer side of the side surface of the sealed container so that the minor axis direction of the support pipe is along the central axis of the sealed container, and the welded part and the sealed container are welded. Process,
Inserting the flat connection pipe into the support pipe, connecting the connection pipe to the compression chamber, and brazing and joining the connection pipe and the support pipe;
A method for manufacturing a compressor, comprising: A jig used for expanding the support pipe of the compressor according to any one of claims 1 to 4,
A through hole is formed in the central part, and the outer peripheral surface has a flat shape corresponding to the inner peripheral surface of the support pipe , and a collet part configured by being divided into at least three parts;
A taper rod that is inserted into the through hole of the collet part and expands the collet part;
With
On the outer peripheral surface of the collet portion, at least two convex portions are formed at positions where the central axis of the through hole is axisymmetric ,
A jig characterized in that only a part of the shape of the outer peripheral surface when the outer peripheral surface of the collet portion is viewed in plan from the direction opposite to the insertion direction of the tapered rod is a convex shape corresponding to the convex portion. .

Images