Patent Description:
For example, <CIT> discloses a compressor including a fixed scroll which is fixed into a cylindrical housing, a turning scroll which revolves in the housing with respect to the fixed scroll, and a discharging pipe which discharges the refrigerant compressed in a compression chamber formed between the fixed scroll and the turning scroll to the outside of the housing. In this compressor, a dome-shaped discharge cover is provided in the housing to cover the compressor. The discharging pipe extends in a direction orthogonal to an axis of the housing and penetrates a top cover and the discharge cover of the housing.

However, in the compressor described in <CIT>, the discharging pipe needs to be inserted through a hole formed in the top cover of the housing and a cylindrical portion provided in the discharge cover at the time of assembly. Therefore, if the hole of the top cover and the cylindrical portion of the discharge cover are not located coaxially with high positional accuracy in an attachment state of the top cover, it is difficult to insert (press-fit) the discharging pipe in some cases. <CIT>, <CIT> and <CIT> disclose other examples of compressors with a discharging pipe.

The present disclosure has been made to solve the above-described problems and an object thereof is to provide a compressor of which workability of assembly can be improved.

In order to solve the above-described problems, a compressor according to the present invention is defined in claim <NUM> and includes: a cylindrical housing extending in an axial direction and in which an opening is formed in a side wall surface of the housing; a suction pipe which allows a refrigerant to be suctioned into the housing; and a discharging pipe which allows the refrigerant compressed by a scroll compression unit in the housing to be discharged to the outside of the housing, wherein the discharging pipe includes a discharging pipe main body having a linear shape passing through the opening so as to be extended in a radial direction outward the housing from an inside thereof, and wherein an inner peripheral surface of the opening is separated from an opening facing portion facing the inner peripheral surface in an outer peripheral surface of the discharging pipe main body.

According the present invention, it is possible to improve the workability of assembly. Further, since residual stress associated with machining such as bending does not occur in the discharging pipe exposed to a high temperature and a high pressure, this is advantageous in pressure resistance.

Hereinafter, a compressor according to an embodiment of the present invention will be described with reference to <FIG> and <FIG>.

As shown in <FIG>, a compressor <NUM> compresses a refrigerant suctioned through a suction pipe <NUM> into a housing <NUM> and discharges the refrigerant from a discharging pipe <NUM> to the outside of the housing <NUM>.

The compressor <NUM> includes a scroll compression unit <NUM> in the housing <NUM>.

The compressor <NUM> may include the scroll compression unit <NUM> and a rotary compression unit <NUM> in the housing <NUM>.

In this embodiment, the compressor <NUM> is a closed type two-stage compressor including the scroll compression unit <NUM> and the rotary compression unit <NUM>.

The compressor <NUM> compresses, for example, carbon dioxide (CO<NUM>) as the refrigerant.

The compressor <NUM> may compress a refrigerant other than carbon dioxide.

The compressor <NUM> includes the housing <NUM>, a rotation shaft <NUM>, the rotary compression unit <NUM>, the scroll compression unit <NUM>, an electric motor <NUM>, the suction pipe <NUM>, and the discharging pipe <NUM>.

The housing <NUM> forms the outer shell of the compressor <NUM>.

The housing <NUM> extends in an axial direction Da.

The housing <NUM> may be provided with the axial direction Da along the up and down direction.

The housing <NUM> may be formed in a cylindrical shape as a whole.

The housing <NUM> includes a housing main body <NUM>, a top cover <NUM>, and a bottom cover <NUM>.

The housing <NUM> defines an inner space <NUM> extending in the axial direction Da.

The housing main body <NUM> is formed in a cylindrical shape extending in the axial direction Da.

A suction pipe connection opening <NUM> is formed at the lower portion of the housing main body <NUM>. The suction pipe <NUM> is connected to the suction pipe connection opening <NUM>.

The suction pipe <NUM> allows the refrigerant to be suctioned into the housing <NUM>. Also, the suction pipe <NUM> allows the refrigerant to be suctioned from the outside of the housing <NUM>.

The refrigerant suctioned through the suction pipe <NUM> into the housing <NUM> is compressed in two stages by the rotary compression unit <NUM> and the scroll compression unit <NUM>.

The top cover <NUM> is provided at the upper portion of the housing main body <NUM>.

The top cover <NUM> closes the opening on one side of the housing main body <NUM> in the axial direction Da.

For example, the top cover <NUM> integrally includes a cylindrical portion 13a and a curved portion 13b.

The cylindrical portion 13a is formed in a cylindrical shape extending in the axial direction Da.

The lower end of the cylindrical portion 13a is joined to the upper end of the housing main body <NUM>.

The curved portion 13b is provided to be continuous to the upper end of the cylindrical portion 13a.

The curved portion 13b is curved to protrude upward.

The curved portion 13b closes the upper side of the cylindrical portion 13a.

The top cover <NUM> includes an opening <NUM>.

The opening <NUM> is formed in, for example, the cylindrical portion 13a.

The opening <NUM> penetrates the cylindrical portion 13a in a radial direction Dr. That is, the housing <NUM> includes the opening <NUM> formed on the side surface.

The bottom cover <NUM> is provided at the lower portion of the housing main body <NUM>.

The bottom cover <NUM> closes the opening on the other side of the housing main body <NUM> in the axial direction Da.

A base member <NUM> is provided on the lower side of the bottom cover <NUM>.

The base member <NUM> extends outward in the radial direction Dr intersecting the axial direction Da in the housing <NUM>.

When the compressor <NUM> is installed on a predetermined attachment target, the base member <NUM> is fixed to the predetermined attachment target.

The rotation shaft <NUM> is housed in the housing <NUM>.

The rotation shaft <NUM> extends in the axial direction Da in the housing <NUM>.

The rotation shaft <NUM> is supported by a bearing 17A and a bearing 17B to be rotatable around the axis along the axial direction Da.

The bearing 17A and the bearing 17B are provided with a gap therebetween in the axial direction Da.

The bearing 17A is provided on one side (upper side) of the rotation shaft <NUM> in the axial direction Da.

The bearing 17A is fixed to the inner surface of the housing main body <NUM>.

The bearing 17B is provided on the other side (lower side) of the rotation shaft <NUM> in the axial direction Da.

The bearing 17B is fastened to a cylinder <NUM> constituting the rotary compression unit <NUM>.

The rotary compression unit <NUM> is provided on the bottom portion in the housing <NUM>.

The rotary compression unit <NUM> is disposed below the electric motor <NUM>.

The rotary compression unit <NUM> includes a piston rotor <NUM> and a cylinder <NUM>.

The piston rotor <NUM> is provided at the other end on the other side of the rotation shaft <NUM> in the axial direction Da.

The piston rotor <NUM> is provided eccentrically in the radial direction Dr with respect to the central axis of the rotation shaft <NUM>.

The piston rotor <NUM> rotates eccentrically with respect to the center axis of the rotation shaft <NUM> in accordance with the rotation of the rotation shaft <NUM>.

The cylinder <NUM> houses the piston rotor <NUM> therein.

The piston rotor <NUM> rotates eccentrically in the cylinder <NUM>.

The rotary compression unit <NUM> introduces the refrigerant suctioned through the suction pipe <NUM> to be described later into the cylinder <NUM>.

The rotary compression unit <NUM> compresses the refrigerant by turning the piston rotor <NUM> inside the cylinder <NUM>.

The rotary compression unit <NUM> discharges the compressed refrigerant to the inner space <NUM> set to an intermediate pressure of the housing <NUM> through a discharging hole (not shown).

The scroll compression unit <NUM> is provided at the upper portion in the housing <NUM>.

The scroll compression unit <NUM> is disposed on the upper portion of the electric motor <NUM>.

The scroll compression unit <NUM> includes a fixed scroll <NUM> and a turning scroll <NUM>.

The fixed scroll <NUM> is fixed to the upper surface of the bearing 17A.

The fixed scroll <NUM> includes a spiral fixed lap 31r that protrudes downward.

The turning scroll <NUM> is disposed below the fixed scroll <NUM> to face the fixed scroll <NUM>.

The turning scroll <NUM> is provided at the end portion (upper end) on one side in the axial direction Da of the rotation shaft <NUM> in an eccentric manner in the radial direction Dr. Accordingly, the turning scroll <NUM> rotates eccentrically in accordance with the rotation of the rotation shaft <NUM>.

The turning scroll <NUM> revolves with respect to the fixed scroll <NUM>.

The turning scroll <NUM> includes a turning lap 32r which protrudes upward.

The turning lap 32r of the turning scroll <NUM> meshes with the fixed lap 31r of the fixed scroll <NUM>.

A compression chamber <NUM> is formed between the turning lap 32r of the turning scroll <NUM> and the fixed lap 31r of the fixed scroll <NUM>.

The scroll compression unit <NUM> sucks the refrigerant from the inner space <NUM> into the compression chamber <NUM> through a suction hole (not shown). The refrigerant suctioned into the compression chamber <NUM> is compressed by the turning scroll <NUM> that revolves with respect to the fixed scroll <NUM>. The compressed refrigerant is discharged toward the upper side of the fixed scroll <NUM> through a discharging hole <NUM> formed in the fixed scroll <NUM>.

A discharge cover <NUM> is provided on the upper side of the fixed scroll <NUM>.

The discharge cover <NUM> is housed in the upper portion in the housing <NUM>.

The discharge cover <NUM> is disposed between the top cover <NUM> and the scroll compression unit <NUM>.

The discharge cover <NUM> is fixed to the fixed scroll <NUM> by a bolt and the like.

A discharging space <NUM> is formed between the discharge cover <NUM> and the fixed scroll <NUM>.

The discharging space <NUM> is a space separated from the inner space <NUM> and does not communicate with the inner space <NUM>.

In the discharging space <NUM>, the high-pressure refrigerant compressed by the scroll compression unit <NUM> is discharged from the discharging hole <NUM>. That is, the discharging space <NUM> forms a high pressure region H.

The electric motor <NUM> is disposed at the intermediate portion in the up and down direction in the housing <NUM>.

The electric motor <NUM> includes a rotor <NUM> and a stator <NUM>.

The rotor <NUM> is fixed to the outer surface of the rotation shaft <NUM>.

The rotor <NUM> is disposed between the bearing 17A and the bearing 17B in the axial direction Da.

The stator <NUM> is disposed on the outside of the radial direction Dr of the rotor <NUM> to surround the outer surface of the rotor <NUM>.

The stator <NUM> is fixed to the inner surface of the housing main body <NUM> of the housing <NUM>.

The stator <NUM> is connected to a power supply via a wiring (not shown).

The electric motor <NUM> rotates the rotation shaft <NUM> by electric power supplied from the power supply.

The discharging pipe <NUM> allows the refrigerant compressed by the scroll compression unit <NUM> in the housing <NUM> to be discharged to the outside of the housing <NUM>.

In this embodiment, the discharging pipe <NUM> allows the high-pressure refrigerant compressed in two stages by the rotary compression unit <NUM> and the scroll compression unit <NUM> to be discharged to the outside of the housing <NUM>.

The discharging pipe <NUM> is disposed at the upper portion of the housing <NUM>.

The discharging pipe <NUM> penetrates the top cover <NUM> and the discharge cover <NUM>.

One end of the discharging pipe <NUM> communicates with the discharging space <NUM>.

The other end of the discharging pipe <NUM> opens toward the outside of the housing <NUM>.

As shown in <FIG>, the discharging pipe <NUM> includes a discharging pipe main body <NUM> and an outer pipe <NUM>.

The discharging pipe main body <NUM> has a linear shape penetrating the opening <NUM> and extending in the radial direction Dr of the housing <NUM> from the inside of the housing <NUM> toward the outside of the housing <NUM>.

A base end portion 51b of the discharging pipe main body <NUM> is fixed to a through-hole <NUM> formed in the discharge cover <NUM>.

For example, the base end portion 51b of the discharging pipe main body <NUM> may be press-fitted into the through-hole <NUM>. Also, the base end portion 51b of the discharging pipe main body <NUM> may be joined to the through-hole <NUM> by brazing or welding.

A tip portion <NUM> of the discharging pipe main body <NUM> protrudes from the outer surface of the housing <NUM> toward the outside in the radial direction Dr.

The outer diameter of the outer peripheral surface <NUM> of the discharging pipe main body <NUM> is smaller than the inner diameter of the opening <NUM> by a predetermined length.

An opening facing portion 51d facing an inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM> is separated from the inner peripheral surface 19f of the opening <NUM>.

The opening facing portion 51d of the discharging pipe main body <NUM> and the inner peripheral surface 19f of the opening <NUM> are separated from each other by a predetermined length in the pipe radial direction of the discharging pipe main body <NUM>.

One end portion 52a of the outer pipe <NUM> is fixed to the opening <NUM>.

For example, one end portion 52a of the outer pipe <NUM> may be press-fitted into the opening <NUM>. Also, one end portion 52a of the outer pipe <NUM> may be joined to the opening <NUM> by brazing or welding.

The outer pipe <NUM> has a linear shape extending from the housing <NUM> toward the outside in the radial direction Dr.

The outer diameter of the discharging pipe main body <NUM> is smaller than the inner diameter of the outer pipe <NUM>.

The discharging pipe main body <NUM> is inserted into the outer pipe <NUM>.

The tip portion <NUM> of the discharging pipe main body <NUM> is disposed at the same position in the radial direction Dr of the housing <NUM> with respect to a tip <NUM> of the outer pipe <NUM> or on the inside in the radial direction Dr of the housing <NUM> in relation to the tip <NUM>. That is, the tip portion <NUM> of the discharging pipe main body <NUM> does not protrude toward the outside in the radial direction Dr of the housing <NUM> with respect to the tip <NUM> of the outer pipe <NUM>.

The outer pipe <NUM> and the discharging pipe main body <NUM> is joined by brazing.

Accordingly, a brazing material W is interposed between the inner surface of the outer pipe <NUM> and the outer peripheral surface <NUM> of the discharging pipe main body <NUM>.

The brazing material W is continuously provided at least from the tip portion <NUM> of the discharging pipe main body <NUM> to the opening facing portion 51d.

In this way, in the discharging pipe main body <NUM>, the base end portion 51b is fixed to the through-hole <NUM> of the discharge cover <NUM> and the tip portion <NUM> is fixed to the opening <NUM> through the outer pipe <NUM>.

The intermediate portion of the discharging pipe main body <NUM> is exposed to a space <NUM> between the housing <NUM> and the discharge cover <NUM>.

For example, a connection pipe member <NUM> may be connected to the inside of the tip portion <NUM> of the discharging pipe main body <NUM>. The connection pipe member <NUM> may be inserted into the tip portion <NUM> of the discharging pipe main body <NUM>.

The connection pipe member <NUM> may be press-fitted into the tip portion <NUM> of the discharging pipe main body <NUM>. Also, the connection pipe member <NUM> may be joined to the tip portion <NUM> of the discharging pipe main body <NUM> by brazing or welding.

In the connection pipe member <NUM>, an external pipe is connected to the compressor <NUM>.

Part of the connection pipe member <NUM> protrudes toward the outside in the radial direction Dr of the housing <NUM> in relation to the tip portion <NUM> of the discharging pipe main body <NUM>.

The connection pipe member <NUM> includes an enlarged diameter portion 53d which is formed at a portion protruding toward the outside in the radial direction Dr of the housing <NUM> in relation to the tip portion <NUM> of the discharging pipe main body <NUM>.

An external pipe is connectable to the enlarged diameter portion 53d.

The connection pipe member <NUM> is thicker than the discharging pipe main body <NUM>.

When assembling the compressor <NUM>, for example, an operator first attaches the discharging pipe main body <NUM> of the discharging pipe <NUM> to the through-hole <NUM> of the discharge cover <NUM> through the opening <NUM>. At this time, the outer pipe <NUM> is not mounted on the opening <NUM>. The inner diameter of the opening <NUM> is larger than the outer diameter of the discharging pipe main body <NUM>. Therefore, the inner peripheral surface 19f of the opening <NUM> and the opening facing portion 51d facing the inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM> are separated from each other in the pipe radial direction of the discharging pipe main body <NUM>. Therefore, the operator can easily attach the discharging pipe main body <NUM> to the through-hole <NUM> of the discharge cover <NUM> through the opening <NUM>.

Then, the operator attaches the outer pipe <NUM> to the opening <NUM>.

Further, the operator joins the outer pipe <NUM> to the discharging pipe main body <NUM> by brazing.

For example, the operator may subsequently connect the connection pipe member <NUM> to the tip portion <NUM> of the discharging pipe main body <NUM>.

According to the compressor <NUM> of this embodiment, the discharging pipe <NUM> penetrates the opening <NUM> provided on the side surface of the housing <NUM>. The inner peripheral surface 19f of the opening <NUM> is separated from the opening facing portion 51d of the discharging pipe main body <NUM>. In such a configuration, when the discharging pipe <NUM> is fixed to the opening <NUM> after the discharging pipe <NUM> penetrates the opening <NUM>, the discharging pipe <NUM> can be easily inserted into the opening <NUM>. Thus, it is possible to improve the workability of assembly of the compressor <NUM>. Since residual stress associated with machining such as bending does not occur in the discharging pipe exposed to a high temperature and a high pressure as compared with a structure in which the discharging pipe is inserted in the axial direction from the upper surface of the housing <NUM> and is bent in the radial direction, this is advantageous in pressure resistance.

Further, according to an example of this embodiment, the outer diameter of the outer peripheral surface <NUM> is smaller than the inner diameter of the inner peripheral surface 19f. Accordingly, a gap can be formed between the opening <NUM> and the discharging pipe main body <NUM> by separating the inner peripheral surface 19f of the opening <NUM> from the opening facing portion 51d facing the inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM>.

Further, according to an example of this embodiment, the discharging pipe <NUM> further includes the outer pipe <NUM> which has one end portion fixed to the opening <NUM> and extends toward the outside in the radial direction Dr of the housing <NUM>.

According to such a configuration, the discharging pipe main body <NUM> is inserted into the outer pipe <NUM>. The discharging pipe <NUM> has a double structure in which the outer pipe <NUM> is provided on the outside of the discharging pipe main body <NUM> on the outside in the radial direction Dr in relation to the outer peripheral surface <NUM> of the housing <NUM>. Accordingly, the thickness of the discharging pipe <NUM> obtained by combining the discharging pipe main body <NUM> with the outer pipe <NUM> can be increased and the pressure resistance of the discharging pipe <NUM> on the outside in the radial direction Dr of the housing <NUM> can be increased.

Further, one end portion of the outer pipe <NUM> is fixed and the discharging pipe main body <NUM> is located therein. Accordingly, part of a gap between the inner peripheral surface 19f of the opening <NUM> and the opening facing portion 51d facing the inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM> can be formed (filled) with the outer pipe <NUM> made of a rigid body. Accordingly, it is possible to more firmly fix the discharging pipe main body <NUM> to the opening <NUM>, for example, as compared with a structure in which a gap between the inner peripheral surface 19f of the opening <NUM> and the opening facing portion 51d of the discharging pipe main body <NUM> is filled with a sealing material or the like. Accordingly, it is possible to suppress the concentration of stress on the discharging pipe main body <NUM>.

Further, since the outer pipe <NUM> is provided, the gap between the inner peripheral surface 19f of the opening <NUM> and the opening facing portion 51d of the discharging pipe main body <NUM> can be further increased. Accordingly, the inner diameter of the opening <NUM> can be larger than the outer diameter of the discharging pipe main body <NUM>. Thus, the operator can more easily insert the discharging pipe main body <NUM> into the opening <NUM> when assembling the compressor <NUM>.

Further, it is possible to ensure the long joint area between the outer pipe <NUM> and the discharging pipe main body <NUM> in the extension direction of the discharging pipe main body <NUM> by joining the outer pipe <NUM> and the discharging pipe main body <NUM> to each other in a portion in which the discharging pipe main body <NUM> is inserted into the outer pipe <NUM>. Thus, the discharging pipe main body <NUM> is more firmly joined to the housing <NUM> through the outer pipe <NUM>.

Further, according to the invention in the compressor <NUM>, the brazing material W is interposed between the outer pipe <NUM> and the discharging pipe main body <NUM>.

Accordingly, the outer pipe <NUM> and the discharging pipe main body <NUM> can be strongly joined to each other.

Further, since a gap between the outer pipe <NUM> and the discharging pipe main body <NUM> is closed by the brazing material W, it is possible to increase the pressure resistance and the sealing property between the outer pipe <NUM> and the discharging pipe main body <NUM> as compared with a configuration in which the gap is closed by a sealing material or the like.

Further, according to the invention the brazing material W is provided at least from the tip portion <NUM> of the discharging pipe main body <NUM> to the opening facing portion 51d of the discharging pipe main body <NUM>.

Accordingly, it is possible to ensure the long joint area in which the outer pipe <NUM> and the discharging pipe main body <NUM> are joined to each other by brazing in the extension direction of the discharging pipe main body <NUM>. Thus, the discharging pipe main body <NUM> is firmly fixed.

Further, according to an example of this embodiment, the tip portion <NUM> of the discharging pipe main body <NUM> is disposed at the same position in the radial direction Dr of the housing <NUM> with respect to the tip <NUM> of the outer pipe <NUM> or on the inside in the radial direction Dr of the housing <NUM>.

Accordingly, the tip portion <NUM> of the discharging pipe main body <NUM> does not protrude from the tip <NUM> of the outer pipe <NUM> toward the outside in the radial direction Dr of the housing <NUM>. Accordingly, the discharging pipe main body <NUM> has a double structure in which the outer pipe <NUM> is provided on the outside of the discharging pipe main body <NUM> in a portion on the outside in the radial direction Dr in relation to the outer surface of the housing <NUM> and can ensure high pressure resistance.

Further, according to an example of this embodiment, the intermediate portion of the discharging pipe main body <NUM> is exposed to the space <NUM> between the housing <NUM> and the discharge cover <NUM>.

In the housing <NUM>, the discharging space <NUM> which faces the scroll compression unit <NUM> inside the discharge cover <NUM> becomes the high pressure region H having a higher pressure than the atmosphere outside the housing <NUM>. Further, the space <NUM> between the housing <NUM> and the discharge cover <NUM> in the housing <NUM> becomes an intermediate pressure region M having a higher pressure than the atmosphere outside the housing <NUM> and a lower pressure than the discharging space <NUM> inside the discharge cover <NUM>. That is, the intermediate portion of the discharging pipe main body <NUM> is exposed to the intermediate pressure region M between the inner surface of the housing <NUM> and the outer peripheral surface of the discharge cover <NUM>. Therefore, the discharging pipe main body <NUM> does not need to be exposed to the high pressure region H and the thickness thereof can be reduced.

Further, according to an example of this embodiment, in the compressor <NUM>, the connection pipe member <NUM> that is thicker than the discharging pipe main body <NUM> is connected to the tip portion <NUM> of the discharging pipe main body <NUM>.

In this way, an external pipe can be connected to the connection pipe member <NUM> to which the tip portion <NUM> of the discharging pipe main body <NUM> is connected. The high-pressure refrigerant discharged from the inside of the housing <NUM> flows through the connection pipe member <NUM>. Therefore, the differential pressure between the inside of the connection pipe member <NUM> through which the high-pressure refrigerant flows and the outside of the connection pipe member <NUM> which is exposed to the atmosphere increases in a portion protruding toward the outside of the housing <NUM> in the radial direction Dr in relation to the tip portion <NUM> of the discharging pipe main body <NUM> in the connection pipe member <NUM>. Since the connection pipe member <NUM> is thicker than the discharging pipe main body <NUM>, it is possible to ensure the pressure resistance of the connection pipe member <NUM>.

Further, according to an example of this embodiment, the compressor <NUM> compresses the refrigerant in two stages by the rotary compression unit <NUM> and the scroll compression unit <NUM>.

Accordingly, the compressor <NUM> constitutes the two-stage compressor. The pressure of the refrigerant discharged from the compressor <NUM> with such a configuration is high. Therefore, since the discharging pipe <NUM> having high pressure resistance while improving the workability of assembly by the above-described configuration is provided, the effectiveness of the compressor <NUM> is increased.

Further, according to an example of this embodiment, the refrigerant is carbon dioxide.

In this way, when the refrigerant to be compressed is carbon dioxide, the compressor <NUM> is required to have high pressure resistance. On the other hand, the compressor <NUM> with the above-described configuration is particularly suitable.

Examples of the compressor <NUM> described in the embodiment is understood as below.

In this compressor <NUM>, the discharging pipe <NUM> is passed through the opening <NUM> formed in on the side wall surface of the housing <NUM>. The inner peripheral surface 19f of the opening <NUM> is separated from the opening facing portion 51d facing the inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM>. In such a configuration, the discharging pipe <NUM> is passed through the opening <NUM>, and then the discharging pipe <NUM> is fixed to the opening <NUM>, the discharging pipe <NUM> can be easily inserted into the opening <NUM>. Thus, it is possible to improve the workability of assembly of the compressor <NUM>.

(<NUM>) The compressor <NUM> according to a second aspect is the compressor <NUM> of (<NUM>), wherein an outer diameter of the outer peripheral surface <NUM> of the discharging pipe main body <NUM> is smaller than an inner diameter of the inner peripheral surface 19f of the opening <NUM>.

In this way, since the outer diameter of the outer peripheral surface <NUM> of the discharging pipe main body <NUM> is made smaller than the inner diameter of the inner peripheral surface 19f of the opening <NUM>, the inner peripheral surface 19f of the opening <NUM> can be separated from the opening facing portion 51d facing the inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM>.

(<NUM>) The compressor <NUM> according to a third aspect is the compressor <NUM> of (<NUM>) or (<NUM>), wherein the discharging pipe <NUM> further includes an outer pipe <NUM> of which one end portion is fixed to the opening <NUM> and extending in the radial direction Dr outward the housing <NUM>, and wherein the discharging pipe main body <NUM> is inserted to the outer pipe <NUM>.

According to such a configuration, the discharging pipe main body <NUM> is inserted into the outer pipe <NUM>. A double structure in which the outer pipe <NUM> is provided on the outside of the discharging pipe main body <NUM> is formed on the outside in the radial direction Dr in relation to the outer peripheral surface <NUM> of the housing <NUM>. Accordingly, the thickness of the discharging pipe <NUM> obtained by combining the discharging pipe main body <NUM> with the outer pipe <NUM> can be increased and the pressure resistance of the discharging pipe <NUM> on the outside in the radial direction Dr of the housing <NUM> can be increased.

Further, one end portion of the outer pipe <NUM> is fixed, the discharging pipe main body <NUM> is located therein, and a part of a gap between the inner peripheral surface 19f of the opening <NUM> and the opening facing portion 51d facing the inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM> can be formed (filled) with the outer pipe <NUM> made of a rigid body. Accordingly, it is possible to more firmly fix the discharging pipe main body <NUM> to the opening <NUM>, for example, as compared with a structure in which a gap between the inner peripheral surface 19f of the opening <NUM> and the opening facing portion 51d facing the inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM> is filled with a sealing material or the like. Accordingly, it is possible to suppress the concentration of stress on the discharging pipe main body <NUM>.

Further, since the outer pipe <NUM> is provided, the gap between the inner peripheral surface 19f of the opening <NUM> and the opening facing portion 51d facing the inner peripheral surface 19f of the opening <NUM> in the outer peripheral surface <NUM> of the discharging pipe main body <NUM> can be further increased. Accordingly, the inner diameter of the opening <NUM> can be larger than the outer diameter of the discharging pipe main body <NUM>. Thus, it is possible to more easily insert the discharging pipe main body <NUM> into the opening <NUM> when assembling the compressor <NUM>.

(<NUM>) The compressor <NUM> according to a fourth aspect is the compressor <NUM> of (<NUM>), wherein an outer diameter of the discharging pipe main body <NUM> is smaller than an inner diameter of the outer pipe <NUM>, and wherein the brazing material W is interposed between the inner peripheral surface of the outer pipe <NUM> and the outer peripheral surface <NUM> of the discharging pipe main body <NUM>.

In this way, since the brazing material W is interposed between the inner peripheral surface of the outer pipe <NUM> and the outer peripheral surface <NUM> of the discharging pipe main body <NUM>, it is possible to firmly join the outer pipe <NUM> and the discharging pipe main body <NUM> to each other.

Further, since the gap between the outer pipe <NUM> and the discharging pipe main body <NUM> is closed by the brazing material W, it is possible to increase the pressure resistance and the sealing property between the outer pipe <NUM> and the discharging pipe main body <NUM> as compared with a configuration in which the gap is closed by a sealing material or the like.

(<NUM>) The compressor <NUM> according to a fifth aspect is the compressor <NUM> of (<NUM>), wherein the brazing material W is interposed at least from the tip portion <NUM> of the discharging pipe main body <NUM> to the opening facing portion 51d in which the outer peripheral surface <NUM> of the discharging pipe main body <NUM> faces the inner peripheral surface 19f of the opening <NUM>.

(<NUM>) The compressor <NUM> according to a sixth aspect is the compressor <NUM> of any one of (<NUM>) to (<NUM>), wherein the tip portion <NUM> of the discharging pipe main body <NUM> may be, with respect to the tip <NUM> of the outer pipe <NUM>, disposed at the same position in the radial direction Dr of the housing <NUM>, or on the inside in the radial direction Dr thereof.

(<NUM>) The compressor <NUM> according to a seventh aspect is the compressor <NUM> of any one of (<NUM>) to (<NUM>), wherein the base end portion 51b of the discharging pipe main body <NUM> may be fixed to the through-hole <NUM> formed in the discharge cover <NUM> covering the scroll compression unit <NUM> installed in the housing <NUM> and wherein an intermediate portion of the discharging pipe main body <NUM> may be exposed to the space <NUM> between the housing <NUM> and the discharge cover <NUM>.

Accordingly, a portion facing the scroll compression unit <NUM> inside the discharge cover <NUM> in the housing <NUM> becomes a high pressure region H compared with the atmosphere outside the housing <NUM>. Further, the space <NUM> between the housing <NUM> and the discharge cover <NUM> in the housing <NUM> becomes an intermediate pressure region M having a higher pressure than the atmosphere outside the housing <NUM> and a lower pressure than the inside of the discharge cover <NUM>. That is, the intermediate portion of the discharging pipe main body <NUM> is exposed to the intermediate pressure region M between the inner surface of the housing <NUM> and the outer peripheral surface of the discharge cover <NUM>. Therefore, the discharging pipe main body <NUM> does not need to be exposed to the high pressure region H and the thickness thereof can be reduced.

(<NUM>) The compressor <NUM> according to an eighth aspect is the compressor <NUM> of any one of (<NUM>) to (<NUM>), wherein the connection pipe member <NUM> to which the external pipe is connected may be connected to an inside of the tip portion of the discharging pipe main body <NUM>, and wherein the thickness of the connection pipe member <NUM> may be larger than that of the discharging pipe main body <NUM>.

(<NUM>) The compressor <NUM> according to a ninth aspect is the compressor <NUM> of any one of (<NUM>) to (<NUM>), which may further include: the rotation shaft <NUM> extending in the housing <NUM> in the axial direction Da and in which the turning scroll <NUM> of the scroll compression unit <NUM> is attached to one end of the rotation shaft <NUM>; and the rotary compression unit <NUM> including the piston rotor <NUM> provided at the other end of the rotation shaft <NUM>, wherein the refrigerant suctioned through the suction pipe <NUM> into the housing <NUM> is compressed in two stages by the rotary compression unit <NUM> and the scroll compression unit <NUM>.

Accordingly, the compressor <NUM> constitutes the two-stage compressor which compresses the refrigerant in two stages by the rotary compression unit <NUM> and the scroll compression unit <NUM>. The pressure of the refrigerant discharged from the compressor <NUM> with such a configuration is high. Therefore, since the discharging pipe <NUM> having high pressure resistance while improving the workability of assembly by the above-described configuration is provided, the effectiveness of the compressor <NUM> is increased.

(<NUM>) The compressor <NUM> according to a tenth aspect is the compressor <NUM> of any one of (<NUM>) to (<NUM>), wherein the refrigerant may be carbon dioxide.

Claim 1:
A compressor (<NUM>) comprising:
a cylindrical housing (<NUM>) extending in an axial direction (Da) and in which an opening (<NUM>) is formed in a side wall surface of the housing (<NUM>);
a suction pipe (<NUM>) which allows a refrigerant to be suctioned into the housing (<NUM>); and
a discharging pipe (<NUM>) which allows the refrigerant compressed by a scroll compression unit (<NUM>) in the housing (<NUM>) to be discharged to the outside of the housing (<NUM>),
wherein the discharging pipe (<NUM>) includes a discharging pipe main body (<NUM>) having a linear shape passing through the opening (<NUM>) so as to be extended in a radial direction (Dr) outward the housing (<NUM>) from an inside thereof, and
an outer pipe (<NUM>) of which one end portion is fixed to the opening (<NUM>) and extending in the radial direction (Dr) outward the housing (<NUM>), and wherein the discharging pipe main body (<NUM>) is inserted into the outer pipe (<NUM>),
wherein an outer diameter of an outer peripheral surface of the discharging pipe main body (<NUM>) is smaller than an inner diameter of an inner peripheral surface of the opening (<NUM>), and an outer diameter of the discharging pipe main body (<NUM>) is smaller than an inner diameter of the outer pipe (<NUM>),
wherein an inner peripheral surface of the opening (<NUM>) is separated from an opening facing portion (51d) facing the inner peripheral surface in the outer peripheral surface of the discharging pipe main body (<NUM>),
characterized in that
a brazing material (W) is interposed between an inner peripheral surface of the outer pipe (<NUM>) and the outer peripheral surface of the discharging pipe main body (<NUM>), and
the brazing material (W) is interposed from a tip portion (<NUM>) of the discharging pipe main body (<NUM>) to the opening facing portion (51d) in which the outer peripheral surface of the discharging pipe main body (<NUM>) faces the inner peripheral surface of the opening (<NUM>).