JP6607969B2 - Scroll compressor - Google Patents

Description

  The present invention relates to a scroll compressor mounted mainly in a refrigerator, an air conditioner, a water heater, or the like.

  In a conventional general scroll compressor, oil is supplied onto the frame from an oil sump at the bottom of the pressure vessel, for example, in order to lubricate the orbiting scroll and the rotary drive shaft in the pressure vessel. The frame is formed with an oil drain hole for returning the oil to the oil reservoir at the lower part of the pressure vessel, and an oil drain pipe for guiding the oil flow is attached to the oil drain hole.

  As a scroll compressor equipped with an oil drain pipe as described above, there is a compressor in which an oil drain hole having a circular opening is formed in a frame which is a compressor component, and an oil drain pipe having a circular tip is attached to the oil drain hole. It has been proposed (see, for example, Patent Document 1). This scroll compressor is configured such that an oil drain hole extending in the radial direction is formed in the outer peripheral portion of the frame, and a leading end portion of an L-shaped oil drain pipe is inserted into the oil drain hole. With such a configuration, assemblability is simplified and the compressor component is brought into contact with the inner peripheral wall of the pressure vessel to prevent the oil drain pipe from falling off.

  On the other hand, a scroll compressor having an oil drainage pipe in which the insertion portion on the pipe front end side is formed in a cylindrical shape and the pipe end side is formed in a flat shape has also been proposed (see, for example, Patent Document 2). In this scroll compressor, the pipe end side of the oil drain pipe is flattened to pass a narrow gap between the inner peripheral wall of the pressure vessel and the stator of the motor part. The configuration in which the portion is inserted into the circular oil drain hole of the frame is the same as that of Patent Document 1.

JP 2006-132419 A (page 10, FIG. 1) Japanese Patent Laying-Open No. 2005-233096 (page 7, FIG. 2)

  In the conventional scroll compressor described above, when the oil drain pipe is attached to the oil drain hole of the frame, there is a risk that it will fall if it is simply inserted. Therefore, the sheet metal is welded to the oil drain pipe and the sheet metal is attached to the frame. The oil drain pipe was held by fixing it with screws. Further, since the oil drainage pipe is passed through a notch provided on the outer surface of the stator, it is necessary to determine the phase of the oil drainage pipe so that the notch can be passed through, and the sheet metal determines its phase. It also has a role. However, in order to attach the sheet metal, there are problems that the work of welding the sheet metal to the oil drain pipe, the work of fastening the screw to the frame, and the like are increased, and the manufacturing cost increases because the number of parts increases.

  The present invention has been made to solve the above-described problems, and can fix an oil drain pipe and position a phase without using a sheet metal that requires welding or screwing. It is an object to obtain a scroll compressor capable of simplifying the above, reducing the number of parts, and suppressing the manufacturing cost.

Scroll compressor according to this invention includes a pressure vessel, a fixed scroll that is fixed in a pressure vessel, and the orbit scroll to form a refrigerant compression chamber between the fixed scroll in a pressure vessel, the pressure vessel An oil sump formed and a mounting hole formed therethrough, fixed to the inner peripheral wall of the pressure vessel between the fixed scroll and the oil sump, and connected to the frame supporting the orbiting scroll and the orbiting scroll A rotary drive shaft, and an oil drain pipe inserted into the mounting hole. The oil drain pipe includes a vertical tube portion and an insertion portion inclined from the vertical tube portion, and the mounting hole is an insertion portion. The vertical tube portion is in contact with the inner peripheral wall of the pressure vessel.
The scroll compressor according to the present invention includes a pressure vessel, a fixed scroll fixed in the pressure vessel, an orbiting scroll that forms a refrigerant compression chamber between the fixed scroll in the pressure vessel, and the pressure vessel. The oil reservoir is formed in the inner wall of the pressure vessel between the fixed scroll and the oil sump, and is connected to the swing scroll. A rotary drive shaft and an oil drain pipe inserted into the mounting hole. The oil drain pipe includes a vertical tube portion and an insertion portion inclined from the vertical tube portion, and the mounting hole has an opening shape. It is formed in a non-circular shape.

  In the scroll compressor according to the present invention, the drain oil pipe is formed with an inclination in which the upper end of the pipe is lowered outward in the radial direction of the frame with respect to the lower part of the vertical pipe, and the upper end of the drain oil pipe is inserted into the frame. The mounting hole is formed so as to have the same inclination as the upper end of the drainage pipe with respect to the vertical direction, so that there is no need for a sheet metal that has fixed the drainage pipe to the frame. Can be fixed and phased. As a result, the assembly work can be simplified, the number of parts can be reduced, and the manufacturing cost can be reduced.

It is a schematic sectional side view which shows the internal structure of the scroll compressor in Embodiment 1 of this invention. It is a side view including the partial cross section which shows the flame | frame and the oil discharge pipe of the said scroll compressor. It is a figure which shows the flame | frame and oil discharge pipe of the said scroll compressor, Comprising: (a) is a top view, (b) is a front view including a partial cross section. It is a figure which shows the insertion part of the oil discharge pipe upper end of the scroll compressor in Embodiment 2 of this invention, Comprising: (a) is a partial side view, (b) is the AA arrow directional view in (a). (C) is a BB line arrow directional view in (a). It is a figure which shows the insertion part of the oil discharge pipe upper end of the scroll compressor in Embodiment 3 of this invention, Comprising: (a) is a partial side view, (b) is the CC arrow directional view in (a). (C) is a DD line arrow directional view in (a). It is a figure which shows the insertion part of the oil discharge pipe upper end of the scroll compressor in Embodiment 4 of this invention, Comprising: (a) is a partial side view, (b) is the EE arrow directional view in (a). (C) is the FF line arrow directional view in (a). It is a figure which shows the insertion part of the oil discharge pipe upper end of the scroll compressor in Embodiment 5 of this invention, Comprising: (a) is a partial side view, (b) is a GG arrow directional view in (a). (C) is a HH arrow directional view in (a).

Embodiment 1 FIG.
1 is a schematic sectional side view showing an internal structure of a scroll compressor according to Embodiment 1 of the present invention. FIG. 2 is a side view including a partial cross section showing a frame and an oil drain pipe of the scroll compressor.
In the figure, the scroll compressor according to the first embodiment is provided with a vertical pressure container 40 formed in a sealed shape from the upper container 41, the body part 42 and the lower container 43 by welding or the like, and the pressure compressor 40. The compression mechanism unit 10 that compresses the refrigerant and the electric motor unit 30 that is also disposed in the pressure vessel 40 and drives the compression mechanism unit 10 are configured. An oil sump 44 for storing oil Y is formed in the lower container 43 on the other end side in the pressure vessel 40.

The compression mechanism unit 10 is horizontally arranged in the pressure vessel 40 so as to form the refrigerant compression chamber 11 between the fixed scroll 12 fixed to the upper vessel 41 on one end side in the pressure vessel 40 and the fixed scroll 12. A swing scroll 13 that rotates, and a frame 14 that is fixed to the inner peripheral wall 42a of the body portion 42 of the pressure vessel 40 between the fixed scroll 12 and the oil sump 44 and supports the swing scroll 13 so as to freely swing. Configured. The support surface 14c of the frame 14 that supports the rocking scroll 13 is formed with an oil drain hole 14a penetrating vertically. The electric motor section 30 is arranged vertically in the pressure vessel 40 and is rotatably supported by the bearing section 14d of the boss section 14e and the lower bearing section 45 of the frame 14 and on the lower surface of the orbiting scroll 13. And a rotor 31 fixed to the rotation drive shaft 33, a stator 31 fixed to the inner peripheral wall 42 a of the body portion 42, and a rotor 32 fixed to the rotation drive shaft 33.

The rotary drive shaft 33 is formed with an oil feed hole 33a for vertically sending the oil Y of the oil sump 44 to the frame 14 in the axial direction. An oil pump 34 is attached to the lower end of the rotary drive shaft 33 to feed the oil Y of the oil reservoir 44 into the oil feed hole 33a of the rotary drive shaft 33 and lubricate the lubricated parts of the compression mechanism 10. ing. An oil drain pipe 15 is passed between the outer side surface of the stator 31 of the electric motor unit 30 and the inner peripheral wall 42a of the body portion 42. The oil drain pipe 15 is for returning the oil Y on the support surface 14 c of the frame 14 to the oil sump 44, and the insertion portion 15 a which is the upper end portion of the pipe is a mounting hole on the lower end side of the oil drain hole 14 a in the frame 14. It is inserted and held in 14b.

  On the other hand, as shown in FIG. 2, the mounting hole 14 b described above is formed with an inclination J that decreases outward in the frame radial direction (arrow r direction) with respect to the axis C of the frame 14. Further, the oil drain pipe 15 has an insertion portion 15a (pipe upper end portion) of the frame 14 with a bent portion 15b as a boundary with respect to a vertical pipe portion 15c (pipe lower portion) in a vertical posture (in the direction of the dashed line C). It is formed with the same inclination J as the mounting hole 14b. The oil drain pipe 15 is bent so that the vertical tube portion 15c is inscribed in the inner peripheral wall 42a of the body portion 42 of the pressure vessel 40 in a state where the insertion portion 15a is inserted into the mounting hole 14b of the frame 14. It is formed in the shape and dimension of a “bump” shape that is refracted by the portion 15b.

  In the scroll compressor configured as described above, the oil Y is stored in the oil reservoir 44 of the lower container 42, and the oil Y is fed by the drive of the oil pump 34 accompanying the rotation of the rotary drive shaft 33. It is supplied to the compression mechanism unit 10 through the oil hole 33a. Then, when the space below the rocking scroll 13 is filled with the oil Y above the frame 14, the oil Y flows down from the oil drain hole 14 a through the oil drain pipe 15 and enters the oil sump 44 of the lower container 42. It comes to return.

  FIG. 3 shows a mounting phase of the oil drain pipe 15 with respect to the frame 14 in the first embodiment of the present invention. The oil drainage pipe 15 is inserted and fitted into an attachment hole 14b formed obliquely with respect to the axis C of the frame 14, and is fixed with an adhesive. By the way, as in the prior art (Patent Document 1), if it is inserted straight at a right angle (horizontal direction) with respect to the axis C direction (in this case, the vertical direction) of the rotary drive shaft 33, the insertion portion 15a is used as the axis. Since the horizontal phase θ is not uniquely determined, the stator 31 and the vertical tube portion 15c interfere with each other. However, the displacement of the phase θ is limited by inserting the insertion portion 15a of the oil drain pipe 15 into the frame 14 obliquely with respect to the axis C of the rotational drive shaft 33.

  If the insertion part 15a of the drainage pipe 15 is formed obliquely with respect to the vertical pipe part 15c, when the vertical pipe part 15 of the drainage pipe 15 moves in the vertical phase φ direction, the trunk part 42 of the pressure vessel 40 Since the arc is curved opposite to the arc, the movement allowance is reduced and the positioning accuracy to the target phase is improved compared to the case where the drain pipe is inserted from the side as in the prior art (Patent Document 1). Become. Moreover, since the insertion part 15a is inserted so that it may face diagonally upward, the oil Y can be efficiently flowed down and it becomes easy to return to the oil sump 44 of the lower container 42. FIG. Further, since the oil drain pipe 15 is obliquely inserted into the frame 14 and is bent by the bent portion 15b so as to contact the inner peripheral wall 42a of the body portion 42, even if the oil drain pipe 15 is about to come off, the body portion It is restrained by 42 and can prevent a fall.

As described above, the scroll compressor according to the first embodiment can uniquely determine the horizontal phase θ when it is inserted by inserting the insertion portion 15a of the oil drain pipe 15 into the frame 14 obliquely. it can. Further, since the vertical pipe portion 15c of the oil drain pipe 15 is inscribed in the inner peripheral wall 42a of the trunk portion 42, the oil drain pipe 15 cannot move outwardly in the frame radial direction (arrow r direction) from the mounting hole 14b. As a result, the oil drain pipe 15 can be prevented from falling off. As a result, the oil drain pipe 15 can be fixed to the frame 14 and the phase can be positioned without using a sheet metal that requires welding or screwing, thereby simplifying the operation, reducing the number of parts, and reducing the manufacturing cost. It was possible to plan.

Embodiment 2. FIG.
FIG. 4 shows the tip shape of the oil discharge pipe 15A of the scroll compressor according to the second embodiment of the present invention. The main structure of the scroll compressor is almost the same as in FIG. By the way, even if the oil drainage pipe 15 having a circular tip shape as in the first embodiment is obliquely inserted into the mounting hole 14b of the circular opening of the frame 14, the insertion portion 15a may rotate around its axis. Therefore, the vertical phase φ is not uniquely determined.

On the other hand, in the oil drain pipe 15A of the second embodiment, the opening shape of the mounting hole 14b of the frame 14 is formed into a long hole shape, that is, a non-circular shape. On the other hand, the distal end shape of the insertion portion 15a which is the upper end portion of the oil drainage pipe 15 is also formed in a long hole shape that can be inserted into and fitted into the mounting hole 14b of the frame 14. As described above, when the insertion portion 15a of the oil drainage pipe 15A is inserted into the attachment hole 14b of the frame 14 by making the distal end shape of the insertion portion 15a and the opening shape of the attachment hole 14b into a long hole shape, The insertion portion 15a cannot rotate about its axis with respect to 14b. Thereby, in addition to the effect similar to Embodiment 1, there exists an effect that phase (phi) can be determined uniquely.

Embodiment 3 FIG.
FIG. 5 shows an oil discharge pipe 15B of a scroll compressor according to Embodiment 3 of the present invention. The main structure of the scroll compressor is almost the same as in FIG.
In the scroll compressor according to the third embodiment, the opening shape of the mounting hole 14b of the frame 14 is formed in a non-circular elliptical shape. On the other hand, the distal end shape of the insertion portion 15a, which is the upper end portion of the oil drain pipe 15B, is also formed in an elliptical shape that can be inserted into and fitted into the mounting hole 14b of the frame 14. Thus, when the insertion portion 15a of the oil drainage pipe 15B is inserted into the attachment hole 14b of the frame 14 by making the tip shape of the insertion portion 15a and the opening shape of the attachment hole 14b elliptical, the attachment hole 14b On the other hand, the insertion portion 15a cannot rotate around its axis. Thereby, in addition to the same effects as those of the first embodiment, the phase φ can be uniquely determined.

Embodiment 4 FIG.
FIG. 6 shows an oil discharge pipe 15C of a scroll compressor according to Embodiment 4 of the present invention. The main structure of the scroll compressor is almost the same as in FIG.
In the scroll compressor according to the fourth embodiment, the opening shape of the mounting hole 14b of the frame 14 is formed in a substantially triangular shape having R at the corners, that is, a non-circular shape. On the other hand, the distal end shape of the insertion portion 15a, which is the upper end portion of the oil drain pipe 15C, is also formed in a substantially triangular shape that can be inserted into and fitted into the mounting hole 14b of the frame 14. Thus, when the insertion portion 15a of the oil drainage pipe 15C is inserted into the attachment hole 14b of the frame 14 by making the tip shape of the insertion portion 15a and the opening shape of the attachment hole 14b triangular, the attachment hole 14b On the other hand, the insertion portion 15a cannot rotate around its axis. Thereby, in addition to the same effect as in the first embodiment, the phase Φ can be determined more uniquely.

Embodiment 5. FIG.
FIG. 7 shows an oil discharge pipe 15D of a scroll compressor according to Embodiment 5 of the present invention. The main structure of the scroll compressor is almost the same as in FIG.
In the scroll compressor according to the fifth embodiment, the opening shape of the mounting hole 14b of the frame 14 is formed in a substantially rhombus shape or a substantially quadrangular shape having R at the corners, that is, a non-circular shape. On the other hand, the distal end shape of the insertion portion 15a, which is the upper end portion of the oil drain pipe 15D, is also formed in a rhombus shape that can be inserted into and fitted into the mounting hole 14b of the frame 14. Thus, when the insertion portion 15a of the oil drainage pipe 15D is inserted into the attachment hole 14b of the frame 14 by making the tip shape of the insertion portion 15a and the opening shape of the attachment hole 14b into a diamond shape, the attachment hole 14b On the other hand, the insertion portion 15a cannot rotate around its axis. Thereby, in addition to the same effect as in the first embodiment, the phase Φ can be determined more uniquely.

DESCRIPTION OF SYMBOLS 10 Compression mechanism part, 11 Refrigerant compression chamber, 12 Fixed scroll, 13 Rocking scroll, 14 Frame, 14a Oil drain hole, 14b Mounting hole, 14c Support surface, 14d Bearing part, 14e Boss part, 15, 15A, 15B, 15C , 15D oil drain pipe, 15a insertion part, 15b bent part, 15c vertical pipe part, 30 motor part, 31 stator, 32 rotor, 33 rotary drive shaft, 33a oil feed hole, 34 oil pump, 40 pressure vessel, 41 Upper container, 42 trunk, 42a inner peripheral wall, 43 lower container, 44 oil sump, Y oil, θ phase, φ phase, J angle.

Claims (4)

A pressure vessel, a fixed scroll fixed in the pressure vessel, an orbiting scroll forming a refrigerant compression chamber between the pressure vessel and the fixed scroll, and an oil sump formed in the pressure vessel A rotation hole having a through hole formed therein, fixed to the inner peripheral wall of the pressure vessel between the fixed scroll and the oil sump, and supporting the swing scroll, and connected to the swing scroll A drive shaft and an oil drain pipe inserted into the mounting hole;
The oil drainage pipe includes a vertical pipe part, and an insertion part inclined from the vertical pipe part,
The mounting hole is formed at the same inclination as the insertion part,
The scroll compressor characterized in that the vertical tube portion is in contact with an inner peripheral wall of the pressure vessel. A pressure vessel, a fixed scroll fixed in the pressure vessel, an orbiting scroll forming a refrigerant compression chamber between the pressure vessel and the fixed scroll, and an oil sump formed in the pressure vessel A rotation hole having a through hole formed therein, fixed to the inner peripheral wall of the pressure vessel between the fixed scroll and the oil sump, and supporting the swing scroll, and connected to the swing scroll A drive shaft and an oil drain pipe inserted into the mounting hole;
The oil drainage pipe includes a vertical pipe part, and an insertion part inclined from the vertical pipe part,
The mounting hole is formed at the same inclination as the insertion part,
A scroll compressor characterized in that the opening shape of the mounting hole is formed in a non-circular shape. The scroll compressor according to claim 2 , wherein an opening shape of the mounting hole of the frame is an ellipse, a long hole, a triangle, a quadrangle, or a rhombus. The scroll compressor according to any one of claims 1 to 3 , wherein a distal end shape of the insertion portion is formed in a shape to be fitted into the mounting hole.

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