JP2012062756A - Seal structure and compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the leakage of a refrigerant from between a muffler member and a head member by bringing the muffler member and the head member into close contact with each other.SOLUTION: In the seal structure of a head member 50 where a discharge hole 53c is formed to discharge a compressed refrigerant and a muffler member 40 attached to the head member 50 by a plurality of fastening members 43, the muffler member 40 has an annular abutment part 42 which abuts on the head member 50, is located on a side opposite the head member 50 of the abutment part 42, and includes a pressing member 80 attached to the head member 50 together with the abutment part 42 by at least two fastening members 43. The pressing member 80 presses the abutment part 42 to the head member 50 between two fastening parts 81 and 82 by two fastening members 43 adjacent to each other in a circumferential direction.

Description

  The present invention relates to a seal structure of a head member in which a discharge hole for discharging a compressed refrigerant is formed and a muffler member attached to the head member, and a compressor provided with the seal structure.

Conventionally, in a compressor, a muffler member is attached to a head member having a discharge hole through which compressed refrigerant is discharged so as to cover the discharge hole to form a muffler space, which is generated along with discharge from the discharge hole. Noise is reduced (see, for example, Patent Document 1).

JP 2002-147375 A

  However, since the muffler member is formed by drawing or the like, undulation may occur on the surface attached to the head member, and a gap may be formed between the muffler member and the head member. In addition, when the muffler member and the head member are fastened with a bolt or the like, when the fastening force is applied to the muffler member, the adhesiveness of the part away from the fastening part is lowered, and a gap may be generated. If there is a gap between the muffler member and the head member, noise is generated due to the refrigerant jetting from the gap.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a seal structure in which a muffler member and a head member are brought into close contact with each other so that refrigerant can be prevented from leaking from between the muffler member and the head member.

  In order to solve the above problems, a seal structure according to a first aspect of the present invention includes a head member having a discharge hole for discharging a compressed refrigerant, and a muffler member attached to the head member by a plurality of fastening members. In the seal structure, the muffler member has an annular contact portion that contacts the head member, and is disposed on the opposite side of the contact portion from the head member. A pressing member attached to the head member together with the abutting portion, wherein the pressing member includes the abutting portion at a portion between two fastening portions fastened by the two fastening members adjacent in the circumferential direction; The head member is pressed.

  In this seal structure, the portion between the portions of the contact portion of the muffler member that are fastened to the head member by two fastening members adjacent to each other in the circumferential direction is pressed by the pressing member to be brought into close contact with the head member. it can. Therefore, the refrigerant can be prevented from leaking from between the contact portion of the muffler member and the head member.

  A seal structure according to a second invention is characterized in that, in the seal structure according to the first invention, the pressing member presses the abutting portion against the head member over the entire circumference.

  In this seal structure, the abutting portion can be brought into close contact with the head member over the entire circumference by the pressing member.

  A seal structure according to a third invention is the seal structure according to the first or second invention, wherein the pressing member is adjacent to the circumferential direction in a state before being placed on the head member and fastened. It has the protrusion part which protrudes toward the said contact part between two fastening parts, It is characterized by the above-mentioned.

  In this seal structure, the abutting portion of the muffler member can be pressed toward the head member side by the projecting tip of the projecting portion, so that compared to the case where the abutting portion is uniformly pressed on a wide surface without providing the projecting portion. The surface pressure can be increased locally. Therefore, the contact portion and the head member can be more reliably brought into close contact with each other.

  A seal structure according to a fourth aspect of the present invention is the seal structure according to the third aspect of the present invention, wherein the protruding portion is connected to the two fastening members in a state before the pressing member is disposed and fastened on the head member. It includes a portion protruding toward the abutting portion from a plane including the tip of the portion.

  In this seal structure, the pressing force by the pressing member can be increased, and the adhesion between the contact portion and the head member can be further improved.

  A seal structure according to a fifth invention is the seal structure according to the third or fourth invention, wherein the protruding portion is disposed at a position corresponding to a circumferential center between the two fastening portions adjacent in the circumferential direction. It is characterized by being.

  In this seal structure, of the abutting portion of the muffler member and the head member, the adhesion of the central portion in the circumferential direction between the two fastening members, the adhesion of which tends to be lowered by the fastening force acting. Can be improved.

  A seal structure according to a sixth invention is characterized in that, in the seal structure according to the fifth invention, the protruding portion protrudes most at a position corresponding to a center in a circumferential direction between the two fastening portions.

  In this seal structure, the center portion in the circumferential direction between the two fastening members among the contact portions of the contact portion of the muffler member and the head member can be reliably adhered by the protruding portion that protrudes most. . In addition, the protrusion part which most protrudes means the protrusion part with the largest protrusion height from the plane containing the front-end | tip of a fastening part.

  A seal structure according to a seventh invention is the seal structure according to any one of the third to sixth inventions, wherein the head member is disposed radially inward of a portion in contact with the contact portion, and the discharge hole Is formed, and the protruding portion is disposed on the radially outer side of the concave portion of the head member.

  In this seal structure, the adhesion between the contact portion of the muffler member and the head member is improved in the radially outer portion of the concave portion where the refrigerant is likely to leak due to the large pressure pulsation of the coolant. Can do.

  The seal structure according to an eighth aspect of the present invention is the seal structure according to the seventh aspect, wherein the protruding portion protrudes most outward in the radial direction of the concave portion of the head member.

  In this seal structure, of the contact portion between the muffler member and the head member, the radially outer portion of the recess can be reliably brought into close contact with the most protruding protrusion.

  A seal structure according to a ninth invention is characterized in that, in the seal structure according to the seventh or eighth invention, the projecting portion is disposed radially outside the discharge hole of the head member.

  With this seal structure, it is possible to improve the adhesiveness of the portion of the contact portion between the contact portion of the muffler member and the head member on the radially outer portion of the discharge hole where a large amount of refrigerant is likely to leak.

  The seal structure according to a tenth invention is characterized in that, in the seal structure according to any one of the third to ninth inventions, the projecting portion has a cross-sectional area that decreases toward the projecting tip.

  In this seal structure, the surface pressure that presses the contact portion can be increased as compared with the case where the tip of the protrusion is flat, and the adhesion between the contact portion and the head member can be improved.

  The seal structure according to an eleventh aspect of the invention is the seal structure according to any of the third to tenth aspects of the invention, wherein a plurality of the projecting portions are spaced apart in the circumferential direction in a portion between the two fastening portions. It is arranged.

  In this seal structure, the adhesion between the abutting portion of the muffler member and the front head can be improved in the circumferential range where the plurality of projecting portions are arranged.

  A seal structure according to a twelfth invention is characterized in that in the seal structure according to any one of the first to eleventh inventions, the pressing member is higher in rigidity than the muffler member.

  In this seal structure, since the force with which the pressing member presses the contact portion can be increased, the adhesion between the contact portion and the head member can be further improved.

Sealing structure according to the thirteenth aspect of the present invention, in the sealing structure according to any one of the first to 12, wherein the refrigerant, characterized in that it is a CO _2.

This seal structure is particularly effective because it uses a CO ₂ refrigerant that has a large discharge pressure pulsation and easily leaks.

  A compressor according to a fourteenth aspect includes the seal structure according to any one of the first to thirteenth aspects.

  In this compressor, the same effect as the seal structure according to the first to thirteenth inventions can be obtained.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, of the contact portion of the muffler member, a portion between the portions fastened to the head member by the two fastening members adjacent in the circumferential direction is pressed by the pressing member to closely contact the head member. Can do. Therefore, the refrigerant can be prevented from leaking from between the contact portion of the muffler member and the head member.

  In the second invention, the abutting portion can be brought into close contact with the head member over the entire circumference by the pressing member.

  In the third invention, the abutting portion of the muffler member can be pressed to the head member side by the projecting tip of the projecting portion, so that compared to the case where the abutting portion is uniformly pressed on a wide surface without providing the projecting portion. The surface pressure can be increased locally. Therefore, the contact portion and the head member can be more reliably brought into close contact with each other.

  In 4th invention, the pressing force by a press member can be enlarged, and the adhesiveness of a contact part and a head member can be improved more.

  In the fifth aspect of the invention, of the abutting portions of the muffler member and the head member, the adhesion of the central portion in the circumferential direction between the two fastening members, the adhesion of which tends to be lowered due to the fastening force acting. Can be improved.

  In the sixth aspect of the invention, the circumferentially central portion between the two fastening members among the contact portions of the muffler member and the head member can be securely adhered by the projecting portion that protrudes most. it can. In addition, the protrusion part which most protrudes means the protrusion part with the largest protrusion height from the plane containing the front-end | tip of a fastening part.

  In the seventh aspect of the present invention, the contact of the muffler member and the head member is improved in the adhesiveness of the radially outer portion of the concave portion where the refrigerant is likely to leak due to the large pressure pulsation of the refrigerant. be able to.

  In the eighth aspect of the invention, the radially outer portion of the concave portion of the contact portion between the muffler member and the head member can be reliably brought into close contact with the protruding portion that protrudes most.

  In the ninth aspect of the invention, it is possible to improve the adhesion of the portion of the contact portion between the contact portion of the muffler member and the head member at the radially outer portion of the discharge hole where a large amount of refrigerant is likely to leak.

  In the tenth aspect of the invention, it is possible to increase the surface pressure that presses the contact portion and to improve the adhesion between the contact portion and the head member, compared to the case where the tip of the protrusion is flat. .

  In the eleventh aspect, the adhesion between the abutting portion of the muffler member and the front head can be improved in the circumferential range where the plurality of protruding portions are arranged.

  In the twelfth aspect, since the force with which the pressing member presses the contact portion can be increased, the adhesion between the contact portion and the head member can be further improved.

The thirteenth invention is particularly effective because it uses a CO ₂ refrigerant that has a large discharge pressure pulsation and easily leaks.

  In the compressor according to the fourteenth aspect, effects similar to those of the seal structure according to the first to thirteenth aspects can be obtained.

It is a section of the compressor concerning a 1st embodiment of the present invention. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a top view of a head member. It is a top view of a muffler member. It is a top view of a pressing member. (A) is sectional drawing equivalent to FIG. 3 of the compressor which concerns on 2nd Embodiment of this invention, (b) is the elements on larger scale of (a). It is a top view of the pressing member shown in FIG. It is the elements on larger scale which show the use condition of the press member which concerns on the example of a change of 2nd Embodiment. It is a top view of the press member with which the compressor concerning a 3rd embodiment of the present invention is provided. It is CC sectional view taken on the line of FIG. 10, (a) shows the state before fastening, (b) shows the fastened state. It is a top view of the press member which concerns on the example of a change of 3rd Embodiment. It is a top view of the press member with which the compressor concerning a 3rd embodiment of the present invention is provided. It is the DD sectional view taken on the line of FIG. 10, (a) shows the state before being fastened, (b) shows the fastened state. It is sectional drawing of the state before the fastening of the press member which concerns on the example of a change of 3rd Embodiment. It is a top view of the press member which concerns on the example of a change of 3rd Embodiment. It is a fragmentary perspective view of the press member which concerns on the example of a change of 3rd Embodiment. It is sectional drawing of the press member which concerns on other embodiment of this invention. It is a top view of the press member concerning other embodiments of the present invention. (A) is a top view of the press member which concerns on other embodiment of this invention, (b) is the EE arrow directional view of (a).

<First Embodiment>
The first embodiment of the present invention will be described below.
As shown in FIG. 1, the compressor 1 of the present embodiment includes a hermetic casing 10, and a drive mechanism 20 and a compression mechanism 30 disposed in the hermetic casing 10. In the cross-sectional view of FIG. 1, a part of hatching is omitted. The compressor 1 is used by being incorporated in a refrigeration cycle such as an air conditioner, for example, compresses the refrigerant (CO2 in this embodiment) introduced from the introduction pipe 11 and discharges it from the discharge pipe 12.

  An upper portion of the hermetic casing 10 is provided with a discharge pipe 12 for discharging the compressed refrigerant and a terminal terminal 13 for supplying a current to a coil of a stator 21b (to be described later) of the drive mechanism 20. An inlet tube 11 for introducing the refrigerant into the compressor 1 is provided on the side of the sealed casing 10. In addition, lubricating oil for smoothing the operation of the sliding portion of the compression mechanism 30 is stored in the lower portion of the sealed casing 10. The portion where the lubricating oil is stored is referred to as an oil storage portion 14.

  The drive mechanism 20 is provided to drive the compression mechanism 30 and includes a motor 21 serving as a drive source and a shaft 22 attached to the motor 21.

    The motor 21 includes a substantially cylindrical stator 21b fixed to the inner surface of the hermetic casing 10, and a rotor 21a disposed on the radially inner side of the stator 21b via an air gap. The rotor 21a has a magnet (not shown), and the stator 21b has a coil. The motor 21 rotates the rotor 21a by electromagnetic force generated by passing a current through the coil. Further, the outer peripheral surface of the stator 21b is not in close contact with the inner peripheral surface of the sealed casing 10 over the entire circumference, and a gap penetrating in the vertical direction (not shown) is interposed between the stator 21b and the sealed casing 10. Is formed.

  The shaft 22 is provided to transmit the driving force of the driving mechanism 20 to the compression mechanism 30. The shaft 22 is fixed to the inner peripheral surface of the rotor 21a and rotates integrally with the rotor 21a. The shaft 22 is provided with an eccentric portion 22a so as to be positioned in a cylinder chamber 60a of a cylinder 60 described later. The eccentric portion 22 a has a substantially cylindrical shape, and its axis is eccentric from the rotation center of the shaft 22. A roller 61a, which will be described later, is mounted on the outer peripheral surface of the eccentric portion 22a. When the shaft 22 is rotated, the eccentric portion 22a and the roller 61a are eccentrically rotated.

  An oil supply passage 22b extending in the up-down direction is formed inside the lower half of the shaft 22. The oil supply passage 22b communicates with a plurality of discharge ports 22c to 22f formed on the side surface of the shaft 22 (including the eccentric portion 22a). A spiral blade-shaped pump member (not shown) is disposed in the lower portion of the oil supply passage 22b. The pump member has a function of sucking the lubricating oil in the oil reservoir 14 into the oil supply passage 22b as the shaft 22 rotates. The sucked lubricating oil is discharged from the discharge ports 22c to 22f and supplied to the outer peripheral surface of the shaft 22 (including the eccentric portion 22a).

  The compression mechanism 30 is provided to compress the refrigerant introduced from the introduction pipe 11. The compression mechanism 30 includes a muffler member 40, a front head (head member) 50, a cylinder 60 and a piston 61, and a rear head 70 from the top to the bottom along the rotation axis direction of the shaft 22. A pressing member 80 is disposed on the upper surface of a contact portion 42 described later of the muffler member 40.

  As shown in FIGS. 1 and 2, the cylinder 60 is a substantially cylindrical member, and the outer peripheral surface thereof is fixed to the inner peripheral surface of the sealed casing 10. In FIG. 2, the shaft 22 is omitted. The cylinder 60 is formed with a cylinder chamber 60a having a substantially circular horizontal cross section and an introduction path 60b that communicates with the cylinder chamber 60a and into which the introduction pipe 11 is fitted. A piston 61 is disposed in the cylinder chamber 60a. The cylinder chamber 60a communicates with a muffler space A described later via a discharge hole 53c (see FIG. 3) formed in the front head 50. Further, as shown in FIG. 2, the cylinder 60 is formed with a plurality of oil return passages 60c penetrating in the vertical direction outside the cylinder chamber 60a in the radial direction.

  As shown in FIG. 1, the piston 61 includes a cylindrical roller 61a that is rotatably mounted on the outer peripheral surface of the eccentric portion 22a, and extends radially outward from the outer peripheral surface of the roller 61a. The blade (not shown) is supported by the blade 60 so as to be swingable and advanceable and retractable in the extending direction. As the shaft 22 rotates, the roller 61a rotates eccentrically while contacting the inner peripheral surface of the cylinder chamber 60a. As a result, the volume of the space surrounded by the outer peripheral surface of the roller 61a, the blade, and the cylinder chamber 60a changes, so that the refrigerant introduced into the cylinder chamber 60a is compressed.

  As shown in FIG. 1, the front head (head member) 50 is fixed to the upper surface of the cylinder 60 and closes the opening above the cylinder chamber 60 a of the cylinder 60. As shown in FIGS. 2 to 4, the front head 50 includes an annular disc-shaped main body 51 formed with a bearing hole 51 a into which the shaft 22 is rotatably inserted, and the main body so as to surround the bearing hole 51 a. And a cylindrical boss portion 52 protruding upward from 51. The front head 50 is manufactured by sintering metal powder, but may be manufactured by a method other than sintering such as casting or machining.

  As shown in FIGS. 3 and 4, a recess 53 is formed on the upper surface of the main body 51. The concave portion 53 includes a fan-shaped concave portion 53a having a fan shape in a plan view and a valve accommodating concave portion 53b extending from one side in the radial direction of the fan-shaped concave portion 53a. A discharge hole 53c that communicates with the cylinder chamber 60a and discharges the refrigerant compressed in the cylinder chamber 60a is formed on the bottom surface of the fan-shaped recess 53a.

  Also, in the recess 53, a discharge valve 54 (see FIG. 4, not shown in FIG. 3) that opens and closes the outlet of the discharge hole 53c, and a presser that is disposed on the upper surface of the discharge valve 54 and regulates the opening of the discharge valve. A member (not shown) is arranged. The discharge valve 54 and the base end portion of the pressing member are fixed by a pin (not shown) fitted in a pin fitting hole 53d formed in the bottom surface of the valve housing recess 53b. Due to the pressure of the refrigerant sent from the cylinder chamber 60a to the discharge hole 53c, the tip end portion (the right end portion in FIG. 4) of the discharge valve 54 is pushed upward, and the refrigerant is discharged from the discharge hole 53c. At this time, the refrigerant discharged from the discharge hole 53c is guided by the discharge valve 54, and mainly jets in directions other than the left direction in FIG.

  Bolt holes 51 c and 51 d through which bolts 43 for attaching the muffler member 40 are inserted are formed in the main body 51. Screw holes are formed on the inner peripheral surfaces of the bolt holes 51c and 51d. Note that when screw holes into which the bolts 43 are screwed are formed at positions corresponding to the bolt holes 51c and 51d of the cylinder 60, screw holes may not be formed in the bolt holes 51c and 51d. . A lower surface of an abutting portion 42 (to be described later) of the muffler member 40 abuts on the outer peripheral side portion of the upper surface of the main body 51. The outer peripheral edge of the fan-shaped recess 53a described above is close to the portion that contacts the lower surface of the muffler member 40.

  As shown in FIG. 3, the muffler member 40 is attached to the upper side of the front head 50, and forms a muffler space A between the front head 50. With this configuration, noise associated with refrigerant discharge is reduced. As shown in FIGS. 3 and 5, the muffler member 40 includes a protrusion 41 that forms a muffler space A between the front head 50 and an abutting portion that abuts on an upper surface of a main body 51 described later of the front head 50. 42. The muffler member 40 is manufactured by drawing a sheet metal (metal flat plate) or the like, but may be manufactured by a method other than drawing.

  The protrusion 41 is formed with an opening 41a through which a boss portion 52 described later of the front head 50 passes, and two discharge ports 41b and 41c for discharging the refrigerant from the muffler space A to the outside. The two discharge ports 41b and 41c are formed at symmetrical positions (positions shifted by 180 °) about the shaft 22.

  The contact portion 42 is annular and extends outward in the horizontal direction from the lower end of the protruding portion 41. The contact portion 42 is provided with fastening portions 42a and 42b formed with bolt holes 42c and 42d through which the bolts 43 are inserted. The bolt holes 42c and 42d are formed at positions corresponding to the bolt holes 51c and 51d of the front head 50.

  As shown in FIG. 3, the pressing member 80 is disposed on the upper surface (surface opposite to the front head 50) of the contact portion 42 of the muffler member 40, and is attached to the front head 50 together with the muffler member 40 by bolts 43. Yes. As shown in FIG. 6, the pressing member 80 has an annular shape that is substantially the same shape as the contact portion 42 in a plan view, and has two fastening portions 81 that come into contact with the two fastening portions 42 a and 42 b of the muffler member 40. , 82 and two arcuate portions 83, 84. Bolt holes 81 a and 82 a through which the bolts 43 are inserted are formed in the fastening portions 81 and 82. As shown in FIGS. 2 and 3, the pressing member 80 is attached to the front head 50 together with the muffler member 40 by the bolts 43 inserted through the bolt holes 42 c and 42 d.

  The lower end surface of the pressing member 80 (fastening portions 81 and 82 and arc-shaped portions 83 and 84) has a flat shape orthogonal to the axial direction (vertical direction in FIG. 3). In the state where the fastening portions 81 and 82 are fastened to the front head 50 together with the contact portion 42 by the bolts 43, the pressing member 80 presses the contact portion 42 toward the front head 50 at the fastening portions 81 and 82. The contact portions 42 are also pressed in the arc-shaped portions 83 and 84. That is, the pressing member 80 presses the contact portion 42 toward the front head 50 over the entire circumference.

  The pressing member 80 is manufactured by sintering, casting, or machining. The pressing member 80 may be a laminate of a plurality of thin metal flat plates. The rigidity of the pressing member 80 is such that the muffler member 40 can be pressed toward the front head 50 by the arc-shaped portions 83 and 84 when the fastening portions 81 and 82 are fastened. It is preferable that the rigidity is higher.

  As shown in FIG. 1, the rear head 70 is fixed to the lower surface of the cylinder 60 and closes the opening below the cylinder chamber 60 a of the cylinder 60. Further, the shaft 22 is rotatably inserted in the rear head 70.

Next, the operation of the compressor 1 will be described.
In the compressor 1, the refrigerant is introduced into the cylinder chamber 60a through the introduction pipe 11 and the introduction path 60b, and then the roller 61a is eccentrically rotated by driving the motor 21, thereby compressing the refrigerant in the cylinder chamber 60a. . The refrigerant compressed in the cylinder chamber 60a is discharged into the muffler space A from the discharge hole 53c of the front head 50, and then discharged to the outside of the compression mechanism 30 through the discharge ports 41b and 41c of the muffler member 40. The refrigerant discharged from the compression mechanism 30 passes through the air gap between the stator 21b and the rotor 21a and is then discharged from the discharge pipe 12.

In the compressor 1 of the present embodiment described above, the front head 50 is pressed by pressing the portions other than the fastening portions 42 a and 42 b of the abutting portion 42 of the muffler member 40 with the arc-shaped portions 83 and 84 of the pressing member 80. Can be adhered to.
Accordingly, when the muffler member 40 is drawn, the contact portion 42 can be brought into close contact with the front head 50 even when the contact portion 42 is wavy and the contact portion 42 is not flat.
In the conventional compressor in which the pressing member 80 is not provided, the contact portion 42 of the muffler member 40 has a close contact with the front head 50 in a portion away from the fastening portions 42a and 42b due to the fastening force acting. In this embodiment, by providing the pressing member 80, portions of the abutting portion 42 away from the fastening portions 42 a and 42 b can be brought into close contact with the front head 50.
As described above, in the compressor 1 of the present embodiment, since the adhesion between the abutting portion 42 of the muffler member 40 and the front head 50 can be improved, the refrigerant is interposed between the abutting portion 42 and the front head 50. Can be prevented from leaking.

  In addition, since the pressing member 80 presses the contact portion 42 toward the front head 50 over the entire circumference, the contact portion 42 can be brought into close contact with the front head 50 over the entire periphery.

  Further, when the pressing member 80 is higher in rigidity than the muffler member 40, the pressing member 80 can increase the force with which the pressing portion 80 presses the contact portion 42, so that the adhesion between the contact portion 42 and the front head 50 is further improved. Can be made.

Further, since the compressor 1 of the present embodiment uses a CO ₂ refrigerant having a large discharge pressure pulsation and easily leaking as the refrigerant, the muffler member 40 and the front head 50 using the pressing member 80 as described above. The seal structure is particularly effective.

  The arcuate portions 83 and 84 of the pressing member 80 of the present embodiment have a constant radial length, but may not be constant. For example, the part with a large radial direction length and the small part may be alternately formed in the circumferential direction.

  Further, the arc-shaped portions 83 and 84 of the pressing member 80 of the present embodiment have the same radial length as the contact portion 42 of the muffler member 40 and press the entire radial range of the contact portion 42. However, the radial direction length may be shorter than the contact part 42, and a part of the contact part 42 in the radial direction may be pressed.

Second Embodiment
Next, a second embodiment of the present invention will be described. However, about the thing which has the structure similar to the said 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
As shown in FIG. 7, the compressor of the present embodiment is different from the first embodiment in the configuration of the pressing member, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 8, the pressing member 180 of the present embodiment is an annular member whose outer shape in plan view is substantially the same shape as the contact portion 42, and includes two fastening portions 181 and 182 and two arcuate shapes. Parts 183 and 184. The fastening portions 181 and 182 have substantially the same shape as the fastening portions 81 and 82 of the first embodiment.

  The arcuate portions 183 and 184 have a circular arc shape in plan view, and connect the two fastening portions 181 and 182, respectively. The arc-shaped portion 183 is disposed on the radially outer side of the discharge hole 53 c of the front head 50.

  As shown in FIG. 7, the lower end portions of the arc-shaped portions 183 and 184 protrude downward (on the contact portion 42 side) in the radial center portion. That is, the lower end portions of the arc-shaped portions 183 and 184 have a cross-sectional area that decreases downward. These protruding portions are referred to as protruding portions 183a and 184a. As shown in FIG. 8, the protrusions 183 a and 184 a extend in the circumferential direction, and are formed in the entire circumferential direction of the arc-shaped portions 183 and 184.

  The tips of the protrusions 183a and 184a are located on the same plane as the lower end surfaces of the fastening portions 181 and 182 before the pressing member 180 is placed on the contact portion 42 and fastened. In the bolted state, the pressing member 180 presses the abutting portion 42 toward the front head 50 at the fastening portions 181 and 182, and also moves the abutting portion 42 to the front at the projecting tip of the projecting portions 183 a and 184 a. The head 50 is pressed. That is, the pressing member 80 presses the contact portion 42 toward the front head 50 over the entire circumference.

  The pressing member 180 is manufactured by sintering, casting, or machining. The rigidity of the pressing member 180 is the same as that of the pressing member 80 of the first embodiment.

  According to the present embodiment, the abutting portion 42 of the muffler member 40 can be pressed toward the front head 50 by the projecting tips of the projecting portions 183a and 184a of the pressing member 180, so that the projecting portion projects as in the first embodiment. The surface pressure can be locally increased as compared with the case where the contact portion 42 is pressed uniformly on a wide surface without providing a portion. Therefore, the abutting portion 42 and the front head 50 can be more closely attached.

  Further, since the pressing member 180 has an annular shape and presses the contact portion 42 toward the front head 50 over the entire circumference, the contact portion 42 and the front head are extended over the entire periphery as in the first embodiment. It can be adhered.

  Further, since the projecting portions 183a and 184a of the arc-shaped portions 183 and 184 have a shape in which the cross-sectional area becomes smaller toward the projecting tip, the projecting portion presses the contact portion 42 as compared with the case where the tip of the projecting portion is flat. The contact pressure between the contact portion 42 and the front head 50 can be improved.

  The arc-shaped portions 183 and 184 of the pressing member 180 of the present embodiment have the same radial length as the radial length of the portions other than the fastening portions 42a and 42b of the abutting portion 42 of the muffler member 40. It may be shorter or longer.

In addition, the protruding portions 183a and 184a of the pressing member 180 of the present embodiment have protruding tips formed at the radial center of the arcuate portions 183 and 184, but the position of the protruding tips is not limited to this.
For example, like the protrusion 1183a of the pressing member 1180 shown in FIG. 9A, the protrusion tip may be formed on the outer peripheral side of the arcuate part 183.
Further, for example, a protruding tip may be formed on the inner peripheral side of the arcuate portion 183, like a protruding portion 2183a of the pressing member 2180 shown in FIG.
Further, for example, a plurality of (two in FIG. 9C) protrusions 3183a and 3983c may be formed side by side in the radial direction as in the pressing member 3180 shown in FIG. 9C.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. However, about the thing which has the structure similar to the said 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The compressor of the present embodiment is different from the first embodiment in the configuration of the pressing member, and the other configurations are the same as those in the first embodiment.

  As shown in FIG. 10 and FIG. 11A, the pressing member 280 of the present embodiment is an annular member whose outer shape in plan view is substantially the same shape as the contact portion 42, and has two fastening portions 281 and 282. And two connecting portions 283 and 284 respectively disposed between the two fastening portions 181 and 182, a protruding portion 285 provided in the connecting portion 283, and a protruding portion 286 provided in the connecting portion 284. It is configured. The fastening portions 281 and 282 have substantially the same shape as the fastening portions 81 and 82 of the first embodiment.

  As shown in FIG. 10, the connecting portion 283 has an arc shape in plan view, and connects the two fastening portions 281 and 282. The connecting portion 283 is located on the radially outer side of the ejection hole 53c of the front head 50. As shown in FIG. 11A, the upper end surface of the connecting portion 283 is formed in the same plane as the upper end surfaces of the fastening portions 281 and 282. The length of the connecting portion 283 in the axial direction (vertical direction in FIG. 11) is smaller than the axial length of the fastening portions 281 and 282. In addition, the upper and lower end surfaces of the connecting portion 283 are orthogonal to the axial direction before the pressing member 280 is disposed on the contact portion 42 and fastened. The connecting portion 284 has the same shape as the connecting portion 283 except that the length in the circumferential direction is shorter than that of the connecting portion 283.

  As shown in FIG. 11A, the protruding portions 285 and 286 protrude downward (on the contact portion 42 side) from the lower surfaces of the connecting portions 283 and 284 and extend along the circumferential direction of the connecting portions 283 and 284. ing.

As shown in FIG. 10, the circumferential length S ₁ of the protruding portion 285 is substantially half of the circumferential length L ₁ of the connecting portion 283. The circumferential center position of the projecting portion 285 is substantially the same as the circumferential center position of the connecting portion 283 (that is, the circumferential center position between the fastening portions 281 and 282). In the present embodiment, the position in the center in the circumferential direction of the connecting portion 283 and the position on the radially outer side of the discharge hole 53c of the front head 50 are substantially the same. The protruding portion 285 is formed in a range including a radially outer region of the fan-shaped recess 53a.

Further, the circumferential length S ₂ of the protruding portion 286 is substantially half of the circumferential length L ₂ of the connecting portion 284. The circumferential center position of the protruding portion 286 is substantially the same as the circumferential center position of the connecting portion 284 (that is, the circumferential center position between the fastening portions 281 and 282).

  The projecting portions 285 and 286 have a rectangular cross section in the radial direction, and the projecting tips are formed flat. Therefore, the radial cross section of the connecting portion 283 and the protruding portion 285 (the connecting portion 284 and the protruding portion 286) has the same shape as the radial cross section (see FIG. 3) of the arc-shaped portion 83 (84) of the first embodiment. It is.

  The front end surfaces of the projecting portions 285 and 286 are planes including the lower end surfaces of the fastening portions 281 and 282 (two in FIG. 11A) before the pressing member 280 is disposed on the contact portion 42 and fastened. It protrudes below (indicated by the dotted line). The protrusion heights of the protrusion 285 and the protrusion 286 from the plane may be the same as or different from each other. As shown in FIG. 11B, when the fastening portions 281 and 282 are fastened to the front head 50 together with the abutting portion 42 by the bolts 43, the connecting portions 283 and 284 are bent and deformed to protrude. The front end surfaces of the portions 285 and 286 are flush with the plane including the lower end surfaces of the fastening portions 281 and 282, and the contact portions 42 are pressed toward the front head 50 in the fastening portions 281 and 282, and the protruding portions 285 and 286 are provided. Also, the contact portion 42 is pressed toward the front head 50 side.

  The pressing member 280 is manufactured by sintering, casting, or machining. The pressing member 280 may be manufactured by bonding the protruding portions 285 and 286 to the connecting portions 283 and 284 with an adhesive.

  The rigidity of the pressing member 280 can be flexibly deformed so that the fastening portions 281 and 282 and the projecting portions 285 and 286 can come into contact with the contact portion 42 when the bolts are fastened, and the projecting portions 285 and 286 are provided. Thus, the rigidity is such that the contact portion 42 can be pressed to the front head 50 side. Further, although depending on the rigidity of the muffler member 40, it is preferable that the pressing member 280 has higher rigidity than the muffler member 40 as long as the above condition is satisfied.

  According to this embodiment, the abutting portion 42 of the muffler member 40 can be pressed toward the front head 50 by the projecting tips of the projecting portions 285 and 286 of the pressing member 280, so that it projects as in the first embodiment. The surface pressure can be locally increased as compared with the case where the contact portion 42 is pressed uniformly on a wide surface without providing a portion. Therefore, the abutting portion 42 and the front head 50 can be more closely attached.

  Further, since the projecting portions 285 and 286 are formed at the circumferential center position of the connecting portions 283 and 284 (the circumferential center position between the fastening portions 281 and 282), the contact portion 42 and the front head 50 are provided. Among the abutting portions, the adhesiveness of the central portion in the circumferential direction between the two bolts 43, which tends to be low in adhesiveness when the fastening force acts, can be improved.

Further, since the protruding portion 285 is formed on the radially outer side of the concave portion 53 of the front head 50, the pressure pulsation of the refrigerant is large in the contact portion between the contact portion 42 and the front head 50. It is possible to improve the adhesiveness of the radially outer portion of the recess 53 that is likely to leak.
Further, since the protruding portion 285 is formed at a position on the radially outer side of the discharge hole 53c of the front head 50, the adhesion of the abutting portion on the radially outer side of the concave portion 53 where a large amount of refrigerant easily leaks is improved. be able to.

  In addition, since the projecting portions 285 and 286 project from the plane including the lower end surfaces of the fastening portions 281 and 282 in a state before the bolt fastening, the pressing force by the projecting portions 285 and 286 is greater than that in the case where the projecting portions 285 and 286 do not project. The contact area 42 and the front head 50 can be improved in adhesion.

In addition, the circumferential direction length and formation position of the protrusions 285 and 286 of the pressing member 280 are not limited to those shown in the present embodiment.
In the case where the circumferential lengths of the protrusions 285 and 286 are made shorter than that of the present embodiment, for example, the positions in the center in the circumferential direction as the protrusions 1285 and 1286 of the pressing member 1280 shown in FIG. However, it is preferable to coincide with the center position in the circumferential direction of the connecting portions 283 and 284.
Further, for example, a protrusion 2285 of the pressing member 2280 shown in FIG. 12B may be formed only on the radially outer side of the fan-shaped recess 53a of the front head 50. In this case, the position in the center in the circumferential direction of the protrusion 2285 does not have to coincide with the position in the center in the circumferential direction of the connecting portion 283. The outer edge of the fan-shaped concave portion 53a of the front head 50 is close to the portion in contact with the muffler member 40, and the discharge direction of the refrigerant discharged from the discharge hole 53c is a direction other than the left direction in FIG. For this reason, in a conventional compressor not provided with a pressing member, refrigerant leakage is particularly likely to occur on the radially outer side of the fan-shaped recess 53a. Therefore, by using the pressing member 2280 as shown in FIG. 12B, the leakage of the refrigerant can be effectively suppressed even when the circumferential length of the protrusion 2285 is short.

  In the pressing member 280 of the present embodiment, the protruding portions 285 and 286 protrude downward from the plane including the lower end surfaces of the bolt fastening portions 281 and 282 in the state before fastening, but the protruding tip is the flat surface. It may be located above.

  In addition, the protruding portions 285 and 286 of the pressing member 280 of the present embodiment are formed flat so that the protruding tips come into surface contact with the contact portion 42, but the shape of the protruding tips is the same as that of the second embodiment. The shape which carries out a line contact along the circumferential direction may be sufficient.

<Fourth embodiment>
Next, a fourth embodiment of the present invention will be described. However, about the thing which has the structure similar to the said 1st Embodiment, the description is abbreviate | omitted suitably using the same code | symbol.
The compressor of the present embodiment is different from the first embodiment in the configuration of the pressing member, and the other configurations are the same as those in the first embodiment.

As shown in FIG. 13 and FIG. 14A, the pressing member 380 of the present embodiment is an annular member whose outer shape in plan view is substantially the same shape as the contact portion 42, and has two fastening portions 381, 382. And two connecting portions 383 and 383 arranged between the two fastening portions 381 and 382, three projecting portions 385 to 387 provided in the connecting portion 383, and 3 provided in the connecting portion 384, respectively. It is comprised from the one protrusion part 388-390.
The fastening portions 381 and 382 have substantially the same shape as the fastening portions 81 and 82 of the first embodiment, and the connecting portions 383 and 384 have the same shape as the connecting portions 283 and 284 of the pressing member 280 of the third embodiment. It is.

  As shown in FIG. 14A, the protruding portions 385 to 387 and the protruding portions 388 to 390 protrude downward (on the contact portion 42 side) from the lower surfaces of the connecting portion 383 and the connecting portion 384.

  As shown in FIG. 13, the protruding portion 386 is formed at a central position in the circumferential direction of the connecting portion 383 (that is, a central position in the circumferential direction between the fastening portions 381 and 382). The portion 387 is formed at a position away from the protruding portion 386 by the same distance in the opposite direction in the circumferential direction. In the present embodiment, the center position in the circumferential direction of the connecting portion 383 and the radially outer position of the ejection hole 53c of the front head 50 are substantially the same. Further, the interval between the protruding portion 385 and the fastening portion 381 (the interval between the protruding portion 387 and the fastening portion 382) is substantially the same as the arrangement interval of the protruding portions 385 to 387.

  In addition, the protrusion 389 is formed at the center in the circumferential direction of the connecting portion 384 (that is, the position in the center in the circumferential direction between the fastening portions 381 and 382), and the protrusion 388 and the protrusion 390 are protruded. It is formed at a position away from the portion 389 by the same distance in the opposite direction in the circumferential direction. Further, the interval between the protruding portion 388 and the fastening portion 381 (the interval between the protruding portion 390 and the fastening portion 382) is substantially the same as the arrangement interval of the protruding portions 388 to 390.

  The projecting portions 385 to 390 have a substantially rectangular parallelepiped shape, and the projecting tip is formed flat. The front end surfaces of the projecting portions 385 to 390 project below the plane including the lower end surfaces of the fastening portions 381 and 382 before the pressing member 380 is fastened. The protruding height H2 of the protruding portion 385 and the protruding portion 387 from the plane is the same, and the protruding height H1 of the protruding portion 386 from the plane is larger than the protruding height H2 of the protruding portions 385 and 387. Although not shown, the protrusion heights of the protrusion 388 and the protrusion 390 from the plane are the same, and the protrusion height of the protrusion 386 from the plane is the protrusion height of the protrusions 385 and 387. Bigger than that. The protrusion heights of the protrusion 386 and the protrusion 389 from the plane may be the same or different. In addition, the protruding heights of the protruding portions 385 and 387 and the protruding portions 388 and 390 from the plane may be the same or different.

  As shown in FIG. 14B, when the fastening portions 381 and 382 are fastened to the front head 50 together with the abutting portion 42 by the bolts 43, the connecting portions 383 and 384 are bent and deformed to protrude. The front end surfaces of the portions 385 to 390 are flush with the plane including the lower end surfaces of the fastening portions 381 and 82, and the abutting portions 42 are pressed toward the front head 50 at the fastening portions 381 and 382, and the protrusions 385 to 390. Also, the contact portion 42 is pressed toward the front head 50 side.

  The pressing member 380 is manufactured by sintering, casting, or machining. The pressing member 380 may be manufactured by bonding the protruding portions 385 to 387 and the protruding portions 388 to 390 to the connecting portion 383 and the connecting portion 384 with an adhesive.

  The rigidity of the pressing member 380 can be flexibly deformed so that the fastening portions 381 and 382 and the protruding portions 385, 387, 388, and 390 can come into contact with the contact portion 42 when being fastened, and the protruding portion The rigidity is such that the contact portion 42 can be pressed to the front head 50 side by 385-390. Further, although depending on the rigidity of the muffler member 40, it is preferable that the pressing member 380 has higher rigidity than the muffler member 40 as long as the above condition is satisfied.

  According to this embodiment, the abutting portion 42 of the muffler member 40 can be pressed toward the front head 50 by the projecting tips of the projecting portions 385 to 390 of the pressing member 380, so that it projects as in the first embodiment. The surface pressure can be locally increased as compared with the case where the contact portion 42 is pressed uniformly on a wide surface without providing a portion. Therefore, the abutting portion 42 and the front head 50 can be more closely attached.

  Further, since the projecting portions 386 and 389 are formed at the center in the circumferential direction of the connecting portions 383 and 384 (the center position in the circumferential direction between the two fastening portions 381 and 382), Among the abutting portions with the head 50, it is possible to improve the adhesion of the central portion in the circumferential direction between the two bolts 43, the adhesion of which tends to be lowered by the fastening force acting.

Further, since the protrusions 386 and 387 are formed on the radially outer side of the recess 53 of the front head 50, the pressure pulsation of the refrigerant is large in the contact portion between the contact portion 42 and the front head 50. It is possible to improve the adhesion of the radially outer portion of the recess 53 where the refrigerant is likely to leak.
Further, since the protruding portion 386 is formed at a position radially outside the discharge hole 53c of the front head 50, the adhesion of the contact portion on the radially outer side of the discharge hole 53c where a large amount of refrigerant is likely to leak is improved. Can be made.

  In addition, since the projecting portions 385 to 390 project from the plane including the lower end surfaces of the fastening portions 381 and 382 in the state before the bolt fastening, the pressing force by the projecting portions 385 to 390 is increased as compared with the case where they do not project. Therefore, the adhesion between the contact portion 42 and the front head 50 can be improved.

  Further, since the protruding portion 386 protrudes the most among the protruding portions 385 to 387 in the state before the bolt fastening, the abutting portion 42 can be reliably brought into close contact with the front head 50 by the protruding portion 386. Further, since the protruding portion 389 protrudes the most among the protruding portions 388 to 390 in a state before the bolt fastening, the abutting portion 42 can be reliably brought into close contact with the front head 50 by the protruding portion 389.

  In the pressing member 380 of the present embodiment, in the state before the bolt fastening, the protruding portion 385 and the protruding portion 387 have the same protruding height H2 from the plane including the lower end surfaces of the fastening portions 381 and 382. May be different. The same applies to the protruding portion 388 and the protruding portion 390.

  Further, in the pressing member 380 of the present embodiment, the protrusion 386 has a protrusion height H1 from a plane including the lower end surfaces of the fastening portions 381 and 382 in the state before the bolt fastening, and the protrusions 385 and 387 have a flat surface. However, the three projecting portions 1385 to 1387 may all have the same projecting height from the plane, like the pressing member 1380 shown in FIG. The same applies to the protrusions 388 to 390.

Further, in the pressing member 380 of this embodiment, in the state before the bolt fastening, all the projecting tips of the projecting portions 385 to 390 project from the plane including the lower end surfaces of the fastening portions 381 and 382, but this configuration is limited. Not.
For example, like the pressing member 2380 shown in FIG. 15B, only the projecting tip of the center projecting portion 2386 of the three projecting portions 2385 to 2387 projects from the plane, and the projecting tips of the projecting portions 2385 and 2387 correspond to the projecting tips. It may be located on a plane.
Further, for example, like the pressing member 3380 shown in FIG. 15C, the protruding tips of the protruding portions 3385 to 3387 may all be positioned on the plane. In this case, the rigidity of the pressing member 3380 is higher than that of the present embodiment, and is preferably the same as that of the first and second embodiments.
Further, for example, the protruding tips of the protruding portions 388 to 390 formed on the connecting portion 384 are located on the plane, and the protruding tips of the protruding portions 385 to 397 formed on the connecting portion 383 are the same as in the present embodiment. You may protrude from a plane.

Further, in the pressing member 380 of the present embodiment, the projecting portion 386 that projects most among the projecting portions 385 to 387 and the projecting portion 389 that projects most among the projecting portions 388 to 390 are respectively connected to the connecting portions 383 and 384. However, the positions where the projecting portions 386 and 389 that project most are formed are not limited to these positions.
For example, like the pressing member 4380 shown in FIG. 16A, of the three protrusions 4385 to 4387 provided in the connecting portion 383, the most protruding protrusion 4386 is located at the center in the circumferential direction of the fan-shaped recess 53a. You may form in a position.
Further, in the present embodiment, the central position in the circumferential direction of the connecting portion 383 and the radially outer position of the ejection hole 53c of the front head 50 are substantially the same, but when these two positions are different, You may form the protrusion part which protrudes in the position of the radial direction outer side of the discharge hole 53c of the front head 50. FIG.

  Further, in the pressing member 380 of the present embodiment, the protruding portions 385 to 387 are spaced apart at equal intervals in the circumferential direction, but the spaced intervals may not be equal. The same applies to the protrusions 388 to 390.

In addition, in the pressing member 380 of the present embodiment, three protrusions 385 to 387 (388 to 390) are provided for one connection part 383 (384), but the number of protrusions for one connection part is as follows. It is not limited to three. It may be 2 or less, or 4 or more.
For example, as in a pressing member 5380 shown in FIG. 16B, six protrusions 5385 to 5390 may be formed on the connecting portion 383. Of the six protrusions 5385 to 5390, the protrusions 5387 to 5389 are formed on the radially outer side of the fan-shaped recess 53a, and the protrusion 5388 is formed at the center in the circumferential direction of the fan-shaped recess 53a. The portion 5387 is formed substantially at the center in the circumferential direction of the connecting portion 383. According to this configuration, the adhesion between the contact portion 42 and the front head 50 can be improved in a wider range in the circumferential direction than in the present embodiment.
In the case of the pressing member 5380, the three protruding portions 5387 are the most protruding of the six protruding portions 5385 to 5390 in the state before the bolt fastening, whether the protruding portion 5387 or the protruding portion 5388. May be ~ 5389.

Further, the protruding portions 385 to 390 of the pressing member 380 of the present embodiment are formed flat so that the protruding tip is in surface contact with the contact portion 42, but the shape of the protruding tip is the contact portion 42. The shape may be a line contact or a point contact (that is, a shape whose cross-sectional area decreases toward the tip).
For example, like the protruding portion 6385 of the pressing member 6380 shown in FIG. 17A, the protruding tip may have a shape that makes a line contact along the radial direction.
Further, for example, the protruding tip may be in line contact along the circumferential direction on the inner peripheral side of the abutting portion 42 like a protruding portion 7385 of the pressing member 7380 shown in FIG.
Further, for example, the protruding tip may have a point-contact shape like a protruding portion 8385 of the pressing member 8380 shown in FIG.
Further, in the case of a shape that makes a line contact or a point contact in the circumferential direction, for example, a plurality of (two in FIG. 17D) protrusions 9385a and 9385b have a diameter like a pressing member 9380 shown in FIG. They may be formed side by side in the direction.

  As mentioned above, although embodiment of this invention was described, it should be thought that a specific structure is not limited to the said 1st-4th embodiment. The scope of the present invention is shown not only by the description of the first to fourth embodiments but also by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

For example, in the pressing members of the first to fourth embodiments, the arc-shaped portion or the connecting portion (in the case of the third embodiment, the connecting portion and the protruding portion) are orthogonal to the axial direction in the state before the bolt fastening. However, it may protrude (curve) downward (in the contact portion 42 side) in a part of the circumferential direction.
For example, the arc-shaped portion 483 of the pressing member 480 shown in FIG. 18A projects (curves) the arc-shaped portion 83 of the pressing member 80 of the first embodiment downward in a part in the circumferential direction. It is a shape like this. The most protruding portion 483a corresponds to the protruding portion of the present invention. The position of the projecting portion 483a may be the center position in the circumferential direction of the arc-shaped portion 483 (the radially outer position of the discharge hole 53c of the front head) or the radially outer position of the fan-shaped recess 50a of the front head 50. preferable. The rigidity and bending angle (projection amount) of the pressing member 480 are set so that the lower surfaces of the fastening portions 481 and 482 can come into contact with the contact portion 42 when the bolt is fastened. According to this configuration, the contact portion 42 can be pressed toward the front head 50 by the protruding portion 483a, so that the surface pressure can be locally increased.
The arc-shaped portions 183 and 184 of the second embodiment or the connecting portions 283 and 284 and the protruding portions 285 and 286 of the third embodiment are protruded (curved) downward in a part of the circumferential direction. In this case, the same effect as described above can be obtained.
Further, the connecting portion 583 of the pressing member 580 shown in FIG. 18B is such that the connecting portion 383 of the pressing member 380 of the fourth embodiment protrudes (curves) downward at the approximate center in the circumferential direction. Shape. By forming the connecting portion 383 in such a shape, even if the three protruding portions 585 to 587 have the same protruding height from the lower surface of the connecting portion 583 in the state before the bolt fastening, the fastening portions 581, The protrusion heights from the plane including the lower end surface of 582 can be different from each other.

  In the first to fourth embodiments, the pressing member is an annular member, but may be a semi-annular member. For example, as illustrated in FIG. 19, a pressing member 680 including two fastening portions 681 and 682 and an arc-shaped portion 683 may be used. The arcuate part 683 has the same shape as the arcuate part of the first or second embodiment or the connecting part and the protruding part of the third or fourth embodiment.

  Moreover, in the said 1st-4th embodiment, although the press member is comprised by one member, you may be comprised by the several member which can be divided | segmented. For example, as shown to Fig.20 (a), the press member 780 which consists of two semi-annular press member pieces 780a and 780b may be sufficient. The pressing member piece 780a includes two fastening portions 781a and 782a and an arcuate portion 783a. The pressing member piece 780b includes two fastening portions 781b and 782b disposed on the fastening portions 781a and 782a, and an arcuate portion 783b. In addition, in FIG.20 (b), although the shape of the circular arc-shaped parts 783a and 783b is the same shape as the circular arc-shaped part 83 of the said 1st Embodiment, the circular arc-shaped part of the said 2nd Embodiment or the above-mentioned It may be the same shape as the connecting part and the protruding part of the third or fourth embodiment.

  In the compression mechanism 30 of the above embodiment, the muffler member 40 and the front head 50 are fixed by the two bolts 43, but may be fixed by three or more bolts 43.

  Moreover, although the compressor of the said embodiment uses CO2 as a refrigerant | coolant, you may use refrigerant | coolants other than a CO2 refrigerant | coolant.

  In the above-described embodiment, an example in which the present invention is applied to a compressor having a single muffler structure in which one muffler member 40 is disposed on the front head 50 has been described. The present invention can also be applied to a compressor having a double muffler structure in which the muffler members are arranged and two upper and lower muffler spaces are formed. In this case, the pressing member is disposed on the upper muffler member. Note that the lower muffler member pressed by the front head 50 corresponds to the muffler member of the present invention.

  Moreover, although the said embodiment demonstrated the example which applied this invention to the 1 cylinder type compressor, for example, this invention is applicable also to a 2 cylinder type compressor. In this case, the present invention can also be applied to a seal structure between the muffler member on the rear side and the rear head.

  If this invention is utilized, a muffler member and a head member will be stuck, and it can control that a refrigerant leaks from between a muffler member and a head member.

1 Compressor 22 Shaft (shaft member)
30 Compression mechanism
40 Muffler member 42 Contact part (contact part)
43 Bolt (fastening member)
50 Front head (head member)
51a Bearing hole 53 Recessed portion 53c Discharge hole 80, 180, 280, 380, 480, 580, 680, 780, 1180, 1280, 1380, 2180, 2280, 2380, 3180, 3380, 4380, 5380, 6380, 7380, 8380, 9380 Pressing member 81, 82, 181, 182, 281, 282, 381, 382, 481, 482, 581, 582, 681, 682, 781a, 781b, 782a, 782b Fastening portion 183a, 184a, 285, 286, 385 390, 483a, 585-587, 1183a, 1285, 1286, 1385-1387, 2183a, 2285, 2286, 2385-2837, 3183a, 3385-3837, 4385-4837, 5385-5390, 6385, 7 385, 8385, 9385 Projection

Claims (14)

A seal structure of a head member formed with a discharge hole for discharging a compressed refrigerant and a muffler member attached to the head member by a plurality of fastening members;
The muffler member has an annular contact portion that contacts the head member,
A pressing member disposed on the opposite side of the abutting portion from the head member, and attached to the head member together with the abutting portion by a plurality of the fastening members;
The sealing structure, wherein the pressing member presses the contact portion against the head member at a portion between two fastening portions fastened by two fastening members adjacent in the circumferential direction.   The seal structure according to claim 1, wherein the pressing member presses the contact portion over the entire circumference against the head member.   The pressing member has a protruding portion that protrudes toward the contact portion between the two fastening portions adjacent to each other in the circumferential direction in a state before being arranged and fastened on the head member. The seal structure according to claim 1 or 2, wherein   The pressing member includes a portion in which the protruding portion protrudes toward the abutting portion from a plane including the distal ends of the two fastening portions in a state before being arranged and fastened on the head member. The seal structure according to claim 3, wherein the seal structure is characterized.   5. The seal structure according to claim 3, wherein the protruding portion is disposed at a position corresponding to a center in a circumferential direction between two fastening portions adjacent in the circumferential direction.   The seal structure according to claim 5, wherein the protruding portion protrudes most at a position corresponding to a center in a circumferential direction between the two fastening portions. The head member is disposed on the radially inner side of the portion in contact with the contact portion, and has a recess in which the discharge hole is formed,
The seal structure according to any one of claims 3 to 6, wherein the protruding portion is disposed on a radially outer side of the concave portion of the head member.   The seal structure according to claim 7, wherein the protruding portion protrudes most on a radially outer side of the concave portion of the head member.   9. The seal structure according to claim 7, wherein the protrusion is disposed on a radially outer side of the discharge hole of the head member.   The seal structure according to any one of claims 3 to 9, wherein the projecting portion has a cross-sectional area that decreases toward the projecting tip.   The seal structure according to any one of claims 3 to 10, wherein a plurality of the protruding portions are arranged at positions separated in the circumferential direction in a portion between the two fastening portions.   The seal structure according to claim 1, wherein the pressing member has higher rigidity than the muffler member. The seal structure according to claim 1, wherein the refrigerant is CO ₂ .   A compressor comprising the seal structure according to claim 1.

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