JPWO2019207783A1 - Scroll compressor and its manufacturing method - Google Patents

Abstract

The scroll compressor has a fixed scroll having a fixed base plate provided with a first spiral protrusion, and a swing base plate provided with a second spiral protrusion that meshes with the first spiral protrusion. It is provided with a swing scroll that forms a compression chamber that compresses the refrigerant between the two, a frame that swingably supports the swing scroll, and a main body shell that houses the fixed scroll, the swing scroll, and the frame. .. The fixed scroll and the frame are fixed to the inner wall surface of the main body shell. The fixed base plate is formed with a first recess on the surface facing the frame. A second recess is formed in the frame at a position facing the first recess.

Description

The present invention relates to a scroll compressor used in an air conditioner, a refrigerator, or the like, and a method for manufacturing the same.

Conventionally, a scroll compressor is known as a compressor used in an air conditioner, a refrigerator, or the like. For example, in the scroll compressor disclosed in Patent Document 1, an outer wall projecting toward a fixed scroll is provided on the outer peripheral portion of the frame, and the frame has a concave shape. This scroll compressor is provided with a swing scroll in a recess of the frame. Further, in this scroll compressor, the frame and the fixed scroll are phase-determined and fixed by a fixing member such as a bolt or a pin by using the outer wall of the outer peripheral portion of the frame.

Japanese Unexamined Patent Publication No. 3-74588

In the scroll compressor disclosed in Patent Document 1, since the swing scroll is provided in the recess of the frame, the space where the swing scroll swings is reduced by the thickness of the outer wall of the frame. In particular, in this scroll compressor, the width of the outer wall of the frame becomes thicker because the outer wall of the frame is used to phase-determine and fix the frame and the fixed scroll with fixing members such as bolts or pins. The space where the swing scroll swings is small.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a scroll compressor and a method for manufacturing the same, which can increase the size of the space in which the swing scroll swings. ..

The scroll compressor according to the present invention has a fixed scroll having a fixed base plate provided with a first spiral protrusion portion and a rocking base plate provided with a second spiral protrusion portion that meshes with the first spiral protrusion portion. A swing scroll that forms a compression chamber that compresses the refrigerant between the fixed scroll, a frame that swingably supports the swing scroll, and the fixed scroll, the swing scroll, and the frame. The fixed scroll and the frame are fixed to the inner wall surface of the main body shell, and the fixed base plate has a first recess on the surface facing the frame. The frame is formed with a second recess formed at a position facing the first recess.

According to the present invention, the fixed scroll and the frame are fixed to the inner wall surface of the main body shell, and the phase of the fixed scroll and the frame is determined by using the first recess and the second recess. Fixing members such as bolts or pins that phase and fix the fixed scroll can be omitted or simplified. Therefore, in the scroll compressor of the present invention, the outer wall of the frame can be omitted or the wall thickness can be reduced, so that the space in which the swing scroll swings can be increased.

It is a vertical cross-sectional view which showed the internal structure of the scroll compressor which concerns on Embodiment 1 of this invention. It is the scroll compressor which concerns on Embodiment 1 of this invention, and is the schematic diagram which showed the main part of the compression mechanism part enlarged. FIG. 5 is a schematic view showing a state in which the phase determining member inserted into the first recess is removed from the scroll compressor according to the first embodiment of the present invention. It is the scroll compressor which concerns on Embodiment 2 of this invention, and is the schematic diagram which showed the main part of the compression mechanism part enlarged. It is a modification of the scroll compressor which concerns on Embodiment 2 of this invention, and is the schematic diagram which showed the main part of the compression mechanism part enlarged. It is a modification of the scroll compressor which concerns on Embodiment 2 of this invention, and is the schematic diagram which showed the state which pulled out the phase determining member inserted into the 1st recess and the 2nd recess. It is the scroll compressor which concerns on Embodiment 3 of this invention, and is the schematic diagram which showed the main part of the compression mechanism part enlarged. It is the scroll compressor which concerns on Embodiment 4 of this invention, and is the schematic diagram which showed the compression mechanism part in a plane. It is a schematic diagram which showed the structure which used the parallel key as a phase determining member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each figure, the same or corresponding parts are designated by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. In addition, the shape, size, arrangement, etc. of the configurations shown in each figure can be appropriately changed within the scope of the present invention.

Embodiment 1.
First, the configuration and operation of the scroll compressor 100 will be described with reference to FIGS. 1 and 2. FIG. 1 is a vertical cross-sectional view showing the internal structure of the scroll compressor according to the first embodiment of the present invention. FIG. 2 is a schematic view of the scroll compressor according to the first embodiment of the present invention, in which a main part of the compression mechanism portion is enlarged and shown. The scroll compressor 100 according to the first embodiment is one of the components of a refrigerating cycle used in various industrial machines such as a refrigerator, a freezer, an air conditioner, a refrigerating device, and a water heater.

The scroll compressor 100 sucks in the refrigerant circulating in the refrigeration cycle, compresses it, and discharges it in a high temperature and high pressure state. As shown in FIG. 1, the scroll compressor 100 is a compression mechanism unit in which a fixed scroll 3 and a swinging scroll 4 swinging with respect to the fixed scroll 3 are combined inside a main body shell 1 forming an outer shell. It has 2. Further, the scroll compressor 100 includes an electric motor 7 inside the main body shell 1.

As shown in FIG. 1, the main body shell 1 is formed in a cylindrical shape having a closed space and has pressure resistance. The main body shell 1 is composed of a cylindrical main shell 1a, a substantially hemispherical upper shell 1b that closes the upper surface opening of the main shell 1a, and a substantially hemispherical lower shell 1c that closes the lower surface opening of the main shell 1a. There is. The upper shell 1b and the lower shell 1c are respectively fixed to the main shell 1a by welding or the like.

On the side surface of the main body shell 1, a suction pipe 12 connected to take in the refrigerant into the main body shell 1 and a power feeding unit 19 for supplying power to the scroll compressor 100 are provided. A discharge pipe 13 for discharging the compressed refrigerant from the main body shell 1 is connected to the upper surface of the main body shell 1. On the upper side of the main shell 1, a frame 5 that swingably supports the swing scroll 4 is fixed to the inner wall surface of the main shell 1a by shrink fitting or the like. Further, an oil reservoir 11 for storing lubricating oil is provided at the bottom of the main body shell 1.

As shown in FIG. 1, the fixed scroll 3 is composed of a fixed base plate 3a and a first spiral protrusion 3b provided on the lower surface of the fixed base plate 3a. The swing scroll 4 is composed of a swing base plate 4a and a second spiral protrusion 4b provided on the upper surface of the swing base plate 4a and meshing with the first spiral protrusion 3b. The swing scroll 4 is installed so as to be eccentric with respect to the fixed scroll 3. The first spiral protrusion 3b of the fixed scroll 3 and the second spiral protrusion 4b of the swing scroll 4 are combined to form a compression chamber 20 for compressing the refrigerant.

In the fixed scroll 3, the outer peripheral surface of the fixed base plate 3a is fixed to the inner wall surface of the main shell 1a by shrink fitting or the like. The reason why the outer peripheral surface of the fixed base plate 3a is fixed to the inner wall surface of the main shell 1a is that the fixed scroll 3 can be shrink-fitted by using the wide inner peripheral surface and outer peripheral surface of the main shell 1a to improve workability. This is because, for example, the manufacturing process can be stabilized as compared with the case of shrink fitting into the upper shell 1b. However, in the fixed scroll 3, the outer peripheral surface of the fixed base plate 3a may be shrink-fitted onto the inner wall surface of the upper shell 1b.

A discharge port 14 for discharging a compressed refrigerant having a high temperature and a high pressure is formed in the central portion of the fixed base plate 3a. The compressed high-temperature and high-pressure refrigerant is discharged from the discharge port 14 to the high-pressure chamber 15 above the fixed scroll 3, passes through the discharge pipe 13, and is discharged to the outside of the main body shell 1. The discharge port 14 is provided with a discharge valve 16 for preventing the backflow of the refrigerant.

Further, as shown in FIG. 2, in the fixed base plate 3a of the fixed scroll 3, a phase determining member 9 used for assembling phase setting is inserted on a surface (lower surface in the case of the illustrated example) facing the frame 5. A first recess 8a is formed for this purpose. The first recess 8a is formed on the outer side in the radial direction with respect to the region where the first spiral protrusion 3b of the fixed base plate 3a is provided. Although the first recess 8a shown in the figure shows a structure in which a through hole is formed, the structure is not limited to the through hole, and the upper surface may be closed. The phasing member 9 is, for example, a pin.

The swing scroll 4 revolves with respect to the fixed scroll 3 without rotating with respect to the fixed scroll 3 by the old dam ring 17 for blocking the rotation. The surface of the rocking base plate 4a on the side where the second spiral protrusion 4b is not formed (lower surface in the case of the illustrated example) acts as the rocking scroll thrust bearing surface 40. Further, a hollow cylindrical boss portion 41 is provided at the center of the swing scroll thrust bearing surface 40. The swing scroll 4 revolves on the thrust sliding surface of the frame 5 by rotating the eccentric shaft portion 6a of the main shaft 6 inserted into the boss portion 41.

In the Oldham ring 17, the upwardly protruding Oldham claw is slidably housed in the Oldam groove formed on the swinging scroll thrust bearing surface 40 of the swinging scroll 4, and the downwardly protruding Oldham claw is framed. It is a configuration that is housed so as to be slidable in the Oldham key groove formed in 5.

As shown in FIGS. 1 and 2, the frame 5 has a cylindrical shape that gradually tapers downward, and supports the swing scroll 4 swingably. An annular flat surface is formed on the upper surface of the frame 5. A ring-shaped thrust plate 50 made of a steel plate-based material such as valve steel is provided on the flat surface. The thrust plate 50 functions as a thrust sliding surface of the frame 5. Further, the frame 5 is formed with a protruding wall portion 51 protruding toward the upper shell 1b side on the outer periphery of the flat surface. The upper surface of the protruding wall portion 51 is the upper end surface of the frame 5. The protruding wall portion 51 is formed so that the upper surface thereof is substantially flush with the upper surface of the thrust plate 50. The end surface on the side that supports the swing scroll 4 is not limited to the upper surface of the projected wall portion 51 shown in the figure, and may be the upper surface of another component.

Frame 5 is spaced S ₁ goal between the upper surface of the protruding wall portion 51 is an end on the side that supports the swing scroll 4 and the fixed base plate 3a. That is, the fixed base plate 3a of the fixed scroll 3 and the upper end surface of the frame 5 are not joined, and the fixed scroll 3 and the frame 5 do not come into direct contact with each other. The frame 5 is formed with a second recess 8b in the protruding wall portion 51 at a position facing the first recess 8a for inserting the phase determining member 9 common to the first recess 8a.

Further, as shown in FIG. 1, a main bearing 60 that supports the main shaft 6 rotationally driven by the electric motor 7 in the radial direction is formed in the central portion of the frame 5. Further, the oil return pipe 52 is inserted and fixed to the frame 5 through the discharge holes formed through the inside and outside. The oil return pipe 52 is a pipe for returning the lubricating oil accumulated in the cylinder of the frame 5 to the oil reservoir 11.

The electric motor 7 is composed of an annular stator 7a that is fixedly supported on the inner wall surface of the main body shell 1 by shrink fitting or the like, and a rotor 7b that is rotatably attached to face the inner surface of the stator 7a. ing. The electric motor 7 drives a compression mechanism unit 2 connected via a spindle 6.

The spindle 6 is rotatably supported by a main bearing 60 provided in the central portion of the frame 5 and an auxiliary bearing 62 provided in the central portion of the subframe 61 fixed to the lower part of the main body shell 1 by welding or the like. Has been done. An eccentric shaft portion 6a rotatably supported by the boss portion 41 of the swing scroll 4 is provided at the upper end portion of the main shaft 6. The eccentric shaft portion 6a is engaged with the swing scroll 4 on the eccentric shaft eccentric from the rotation shaft. The spindle 6 rotates with the rotation of the rotor 7b, and the swing scroll 4 is swiveled by the eccentric shaft portion 6a. The subframe 61 is provided with an oil pump 61a. The lubricating oil sucked by the oil pump 61a is sent to each sliding portion through the oil supply hole 63 formed inside the main shaft 6.

Further, the spindle 6 is provided with a slider 18 with a balance weight. The balance weight is provided to cancel the centrifugal force of the rocking scroll 4 generated by the rocking motion. The balance weight is arranged on the side opposite to the direction of the centrifugal force acting on the swing scroll 4. The scroll compressor 100 can reduce the pressing of the second spiral protrusion 4b against the first spiral protrusion 3b by the balance weight.

The slider 18 is rotatably inserted into the boss portion 41. An eccentric shaft portion 6a is inserted into the sliding surface of the slider 18. That is, the slider 18 is interposed between the swing scroll 4 and the eccentric shaft portion 6a of the main shaft 6, and supports the swing scroll 4 in order to make the swing radius variable and to revolve the swing scroll 4. It is something to do.

Next, the operation of the scroll compressor 100 of the first embodiment will be briefly described. When the operation of the scroll compressor 100 is started, the suction refrigerant sucked from the suction pipe 12 enters the compression chamber 20 through a suction port (not shown) provided in the frame 5. The oscillating scroll 4 performs an eccentric turning motion by the eccentric shaft portion 6a of the main shaft 6 rotated by the electric motor 7. Specifically, the swing scroll 4 revolves by preventing its rotation by the old dam ring 17. As a result, the volume of the compression chamber 20 is gradually reduced, and the refrigerant is compressed. The compressed refrigerant is discharged from the discharge port 14 of the fixed base plate 3a into the high-pressure chamber 15, and is discharged to the outside of the main body shell 1 via the discharge pipe 13.

Next, the design restrictions of the compression chamber 20 of the scroll compressor 100 will be described. The scroll compressor 100 has a structural limit on the volume of the compression chamber 20 for compressing the refrigerant. As a general structure of the scroll compressor 100, a compression chamber 20 is formed inside a tubular frame 5 fixed to the inner wall surface of the main body shell 1. Since the scroll compressor 100 is designed so that the swing scroll 4 is housed inside the cylinder of the frame 5, there is a limit to the physical spiral volume. The volume of the compression chamber 20 is determined by the second spiral protrusion 4b provided on the rocking base plate 4a. Therefore, when the outer diameter of the rocking base plate 4a is small, the second spiral protrusion 4b is also small, and the volume of the compression chamber 20 is also small.

Here, in order to design the second spiral protrusion 4b to be large, the outer diameter of the rocking base plate 4a may be designed to be large. However, the outer diameter of the rocking base plate 4a is determined by the inner diameter inside the cylinder of the frame 5. Therefore, the target distance S between the fixed base plate 3a of the fixed scroll 3 and the upper end surface of the frame 5 so that the outer diameter of the swing scroll 4 can be maximized to the vicinity of the inner wall of the main body shell 1. A configuration in which ₁ is provided is conceivable. However, in this case, since it is necessary to fix the fixed scroll 3 to the inner wall surface of the main body shell 1 without joining the fixed base plate 3a and the frame 5 with the joining member, the phase accuracy between the fixed scroll 3 and the frame 5 is correct. Was an issue to secure.

Specifically, the spiral design is a compression portion design, and the meshing of the spiral protrusions provided on the fixed scroll 3 and the swing scroll 4 needs to be highly accurate. Normally, the phase determining pins are used to perform phase out of the spiral protrusions as used in a conventional scroll compressor. However, since the swing scroll 4 revolves, it is difficult to set the phase with the fixed scroll 3 and the direct phase determining pin. Therefore, in a general structure, the swing scroll 4 and the frame 5 are engaged with each other by an old dam ring 17, the fixed scroll 3 and the frame 5 are fixed by a phasing pin, and the fixed scroll 3 and the swing scroll are indirectly fixed. Phase out 4

In the case of a structure in which the fixed scroll 3 is fixed to the inner wall surface of the main body shell 1, the phase setting of the swing scroll 4 and the frame 5 can be engaged with the old dam ring 17 as before. However, since the fixed scroll 3 and the frame 5 are not directly fixed, it is necessary to change the phase setting method from the conventional structure.

Generally, as the rotation phase determination of two parts, a structure in which one location is used as a fulcrum and the rotation phase is determined at another location is the easiest to assemble. That is, it is a structure that positions at two places. If the fixed scroll 3 and the frame 5 are fixed to the inner wall surface of the main body shell 1, it is difficult to apply the conventional method of inserting two phasing pins between the fixed scroll 3 and the frame 5. After determining the phases of the fixed scroll 3 and the frame 5, the fixed scroll 3 is bolted and fixed to the frame 5 as it is, and is fixed to the center of the two pins and the inner wall of the main body shell 1. This is because processing accuracy is required to match the center of the outer diameter of the fixed scroll 3. Therefore, using a structure in which the outer peripheral surface of the fixed scroll 3 is fixed to the main body shell 1, a structure in which the center of the outer diameter of the fixed scroll 3 is used as a fulcrum and the rotation phase out is set to one pin, that is, a structure in which positioning is performed at two locations. If this is done, the effect of facilitating processing and assembly can be obtained.

In the scroll compressor 100 according to the first embodiment, the fixed scroll 3 is fixed to the inner wall surface of the main body shell 1, and the target is between the end surface on the side where the frame 5 supports the swing scroll 4 and the fixed base plate 3a. They are arranged at intervals S ₁ of. That is, the scroll compressor 100 has a configuration in which the fixed base plate 3a of the fixed scroll 3 and the upper end surface of the frame 5 are not joined. Therefore, in the scroll compressor 100, the outer diameter of the rocking base plate 4a is not restricted by the inner diameter of the frame 5, so that the outer diameter of the rocking base plate 4a is used as the design space for the second spiral protrusion 4b as the inner wall of the main body shell 1. It can be expanded to the vicinity. Therefore, the scroll compressor 100 can be designed to have a large volume of the compression chamber 20, and the maximum horsepower can be increased. Further, by adopting a configuration in which the fixed base plate 3a of the fixed scroll 3 and the upper end surface of the frame 5 are not joined, the outer wall surface of the frame 5 provided for joining to the fixed base plate 3a can be omitted. Since it can be done, the material cost can be reduced and the weight can be reduced.

Further, in the scroll compressor 100, since the first recess 8a is formed in the fixed scroll 3 and the second recess 8b is formed in the frame 5 at a position facing the first recess 8a, the first recess 8a and the second recess 8a are formed. By using the recess 8b, for example, a pin which is a common phasing member 9 can be inserted, and assembly phasing can be performed. That is, the scroll compressor 100 expands the outer diameter of the swing base plate 4a to the vicinity of the inner wall of the main body shell 1 as a design space for the second spiral protrusion 4b while ensuring the phase accuracy between the fixed scroll 3 and the frame 5. Therefore, the volume of the compression chamber 20 can be increased.

Next, a method of manufacturing the scroll compressor according to the first embodiment will be described with reference to FIGS. 2 and 3. FIG. 3 is a schematic view of the scroll compressor according to the first embodiment of the present invention, showing a state in which the phasing member inserted into the first recess is removed.

As shown in FIGS. 2 and 3, the method for manufacturing the scroll compressor according to the first embodiment includes a frame fixing step of fixing the frame 5 to the inner wall surface of the main shell 1a, and a first recess after the frame fixing step. After the phasing step of inserting the phasing member 9 into the 8a and the second recess 8b to phasing the fixed scroll 3 and the frame 5, and the phasing step, the fixed base plate 3a is attached to the inner wall surface of the main shell 1a. It has a fixing base plate fixing step of fixing to the fixing base plate, and a sampling step of extracting the phase determining member 9 after the fixing base plate fixing step.

Specifically, as shown in FIG. 2, of the outer peripheral surfaces of the frame 5, the outer peripheral surface located on the outermost side in the radial direction is fixed to the inner wall surface of the main shell 1a by shrink fitting or the like, and then the first recess 8a The phase determining member 9 is inserted into the second recess 8b to determine the phase between the fixed scroll 3 and the frame 5. The phasing member 9 is, for example, a pin. Then, the outer peripheral surface of the fixed base plate 3a is fixed to the inner wall surface of the main shell 1a by shrink fitting or the like. In this way, the rotation phase of the fixed scroll 3 and the frame 5 is determined. As shown in FIG. 3, the pin, which is the phasing member 9, is removed from the first recess 8a and the second recess 8b after fixing the outer peripheral surface of the fixed base plate 3a to the inner wall surface of the main shell 1a. By extracting the phasing member 9 from the first recess 8a and the second recess 8b, it is possible to eliminate the situation where the phasing member 9 and the swing scroll 4 interfere with each other. As shown in FIG. 2, the pin, which is the phase determining member 9, may be left inserted in the first recess 8a and the second recess 8b.

Therefore, in the method of manufacturing the scroll compressor according to the first embodiment, the swing scroll 4 can be enlarged by extracting the phase determining member 9 from the first recess 8a and the second recess 8b. Further, when the phase determining member 9 is configured to be extracted from the first recess 8a and the second recess 8b, the first recess 8a is formed on the spiral tooth, which is a region provided with the first spiral protrusion 3b of the fixing base plate 3a. It can be formed in the inner region. When the phase determining member 9 is configured to be extracted from the first recess 8a and the second recess 8b, a sealing member (not shown) that suppresses the flow of the refrigerant through the first recess 8a is provided in the first recess. It is preferable to provide it at 8a. The sealing member may be formed by pulling out the phasing member 9 from the second recess 8b and fastening it inside the first recess 8a.

Embodiment 2.
Next, the scroll compressor 101 according to the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a schematic diagram showing an enlarged main part of the compression mechanism portion of the scroll compressor according to the second embodiment of the present invention. The same configuration as that of the scroll compressor described in the first embodiment is designated by the same reference numerals, and the description thereof will be omitted as appropriate.

As described above, in the scroll compressor 100, the first recess 8a is formed in the fixed base plate 3a, the second recess 8b is formed in the frame 5, and the phase determining member 9 common to the first recess 8a and the second recess 8b is formed. By inserting, the phase accuracy between the fixed scroll 3 and the frame 5 can be improved. However, if the upper end surface of the frame 5 on which the second recess 8b is formed and the fixed base plate 3a are too far apart from each other and the length of the phase determining member 9 becomes long, the phase shift distance increases and the phase accuracy may decrease. There is. The reason is that, for example, when the hooking allowance and the gap between the pin and the first recess 8a have the same dimensions as the conventional one, the inclination angle is constant, but the longer the pin length, the greater the phase shift distance.

Therefore, the fixed scroll 3 of the scroll compressor 101 according to the second embodiment is provided with a land portion 30 that protrudes from the fixed base plate 3a toward the frame 5 and has a first recess 8a formed therein. On the other hand, the frame 5 is formed with a second recess 8b at a position facing the first recess 8a. Pins are fitted into the first recess 8a and the second recess 8b as a phasing member 9 used for assembling phasing. That is, in the scroll compressor 100, the length of the phase determining member 9 can be shortened by providing the land portion 30 on the fixed base plate 3a, so that the phase shift can be suppressed, and the fixed scroll 3 and the frame 5 can be suppressed. The phase accuracy with and can be improved.

Further, the land portion 30, between the upper end surface of the frame 5, is provided with an interval S ₂ or the thickness of the oscillating base plate 4a. That is, the outer diameter of the rocking base plate 4a can be expanded to a position adjacent to the phase determining member 9. The rocking base plate 4a may have a configuration in which a part of the rocking base plate 4a is always inserted between the land portion 30 and the frame 5 in the revolving motion of the rocking scroll 4, or one between the land portion 30 and the frame 5. The part may be configured to enter at least once per revolution. Therefore, the scroll compressor 100 expands the outer diameter of the swing base plate 4a to the vicinity of the inner wall of the main body shell 1 as a design space for the second spiral protrusion 4b while ensuring the phase accuracy between the fixed scroll 3 and the frame 5. Therefore, the volume of the compression chamber 20 can be increased, and the maximum horsepower can be increased.

It is sufficient to provide the land portion 30 only in the portion where the phase determining member 9 is provided, but in consideration of the rigidity of the fixed scroll 3 and the workability when manufacturing the fixed scroll 3, the land portion 30 is provided on the outer peripheral edge of the fixed scroll 3. It is desirable to provide it along the entire circumference.

Next, a modified example of the scroll compressor 101 of the second embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a modified example of the scroll compressor according to the second embodiment of the present invention, and is a schematic view showing an enlarged main part of the compression mechanism portion. FIG. 6 is a modified example of the scroll compressor according to the second embodiment of the present invention, and is a schematic view showing a state in which the phasing members inserted into the first recess and the second recess are removed. The scroll compressor 101 shown in FIG. 5 has a configuration in which the first recess 8a is a through hole that penetrates the fixed base plate 3a and the land portion 30. That is, in the scroll compressor 101 shown in FIG. 5, the phase determining member 9 fitted in the first recess 8a and the second recess 8b is phase-determined between the fixed scroll 3 and the frame 5, and then the first recess 8a is determined. And can be extracted from the second recess 8b.

Specifically, after the outer peripheral edge of the frame 5 is fixed to the inner wall surface of the main shell 1a by shrink fitting or the like, the phase determining member 9 is inserted into the first recess 8a and the second recess 8b to form a fixed scroll 3. The phase with the frame 5 is determined. The phase determining member 9 is, for example, a pin or the like. Then, after the outer peripheral edge of the fixed base plate 3a is fixed to the inner wall surface of the main shell 1a by shrink fitting or the like, the phase determining member 9 is pulled out from the first recess 8a and the second recess 8b as shown in FIG. In this way, the rotation phase of the fixed scroll 3 and the frame 5 is determined. As shown in FIG. 4, for example, the phase determining member 9 may be in a state of being inserted without being pulled out from the first recess 8a and the second recess 8b.

Embodiment 3.
Next, the scroll compressor 102 according to the third embodiment of the present invention will be described with reference to FIG. 7. FIG. 7 is a schematic diagram showing an enlarged main part of the compression mechanism portion of the scroll compressor according to the third embodiment of the present invention. The same configurations as those of the scroll compressor described in the first and second embodiments are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

Land portions 30 in the third embodiment, between the upper end surface of the frame 5, is provided at a small spacing S ₃ than the thickness of the oscillating base plate 4a. Further, the swing scroll 4 is formed with a thin portion 42 that fits into a gap provided between the land portion 30 and the frame 5. The rocking base plate 4a may have a configuration in which a thin portion 42 is always inserted between the land portion 30 and the frame 5 in the revolving motion of the rocking scroll 4, or the rocking base plate 4a may be configured such that the thin portion 42 is always inserted between the land portion 30 and the frame 5. The thin portion 42 may be inserted at least once per revolution. That is, in this scroll compressor 102, since the upper end surface of the frame 5 and the lower end surface of the land portion 30 are brought close to each other, the length of the phase determining member 9 can be shortened, and the phase shift can be effectively suppressed. The phase accuracy can be improved. Further, in the scroll compressor 102, the swing base plate 4a is moved to a position adjacent to the phase determining member 9 as a whole by forming the thin portion 42 only in the range located in the land portion 30 in the revolving motion of the swing scroll 4. Can be expanded. Therefore, the volume of the compression chamber 20 can be increased, and the maximum horsepower can be increased.

It is sufficient to provide the land portion 30 only in the portion where the phase determining member 9 is provided, but in consideration of the rigidity of the fixed scroll 3 and the workability when manufacturing the fixed scroll 3, the land portion 30 is provided on the outer peripheral edge of the fixed scroll 3. It is desirable to provide it along the entire circumference.

Embodiment 4.
Next, the scroll compressor 103 according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a schematic view of the scroll compressor according to the fourth embodiment of the present invention, in which the compression mechanism portion is shown in a plane. The same configurations as those of the scroll compressor described in the first to third embodiments are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

Generally, the swing scroll 4 of the scroll compressor has a portion in which the swing base plate 4a erects the second spiral protrusion 4b and a portion in which the swing base plate 4a serves as the revolution trajectory of the first spiral protrusion 3b. Just do it. That is, considering the portion used as the compression mechanism portion 2 during operation, the rocking base plate 4a does not need to be substantially circular when viewed in a plane. Here, as shown in FIG. 8, the straight line connecting the central portion O of the swing scroll 4 and the outer end portion 4c of the second spiral protrusion 4b is defined as the X axis, and the center portion O of the rocking base plate 4a As you can see, the straight line orthogonal to the X-axis is defined as the Y-axis, and the X-axis and the Y-axis are divided into four quadrants A to D. The oscillating base plate 4a of the oscillating scroll 4 which is not used as the compression mechanism portion 2 has the second quadrant B and the third quadrant B adjacent to the first quadrant A, assuming that the quadrant including the outer end portion 4c is the first quadrant A. Quadrant C. That is, the swing scroll 4 does not have any functional problem in compressing the refrigerant even if there are notches in the second quadrant B and the third quadrant C.

Therefore, in the scroll compressor 103 according to the fourth embodiment, as shown in FIG. 8, a notch portion is formed in the rocking base plate 4a located in the second quadrant B and the third quadrant C adjacent to the first quadrant A. The configuration is such that 43 and 44 are formed. The land portion 30 is located in the second quadrant B when projected onto an XY plane including the X-axis and the Y-axis. However, the land portion 30 may be located in the third quadrant C when projected on the XY plane including the X-axis and the Y-axis. Although not shown, in the configuration of the first embodiment, when the phase determining member 9 is projected on the XY plane including the X axis and the Y axis, the phase determining member 9 is located in the second quadrant B or the third quadrant C. It is assumed that you are doing.

That is, in the scroll compressor 103 according to the fourth embodiment, the portion of the rocking base plate 4a on which the second spiral protrusion 4b is erected and the portion that becomes the revolution locus of the first spiral protrusion 3b are the second spiral protrusions. The design space of the part 4b can be expanded to the vicinity of the inner wall of the main body shell 1. Therefore, the scroll compressor 103 can increase the volume of the compression chamber 20 and increase the maximum horsepower.

Note that FIG. 8 shows a configuration in which notches 43 and 44 are formed in the second quadrant B and the third quadrant C adjacent to the first quadrant A, but among the second quadrant B and the third quadrant C. , A notch may be formed in at least one quadrant. In this case, the land portion 30 is provided at a position corresponding to the formed notch portion.

Although the present invention has been described above based on the embodiment, the present invention is not limited to the configuration of the above-described embodiment. For example, the internal configuration of the scroll compressor 100 shown is not limited to the above-mentioned contents, and may include other components. Further, FIG. 9 is a schematic view showing a configuration in which a parallel key is used as the phase determining member. As shown in FIG. 9, the second recess 8b may be a key groove, and the phasing member 10 may be a parallel key that fits into the first recess 8a and the second recess 8b. A parallel key is attached to a pin or formed integrally with the pin. By having a parallel key, the phase can be determined by one pin. The parallel key, which is the phase determining member 10, has shown a form based on the fourth embodiment for convenience of explanation, but the present invention is not limited to this, and can be applied to the configurations of the first to third embodiments. In short, the present invention includes a range of design changes and application variations normally performed by those skilled in the art without departing from the technical idea.

1 Main body shell, 1a Main shell, 1b Upper shell, 1c Lower shell, 2 Compressor mechanism, 3 Fixed scroll, 3a Fixed base plate, 3b 1st spiral protrusion, 4 Swing scroll, 4a Swing base plate, 4b 2nd Thrust protrusion, 4c outer end, 5 frame, 6 spindle, 6a eccentric shaft, 7 electric motor, 7a stator, 7b rotor, 8a first recess, 8b second recess, 9, 10 phase determining member, 11 oil Reservoir, 12 suction pipe, 13 discharge pipe, 14 discharge port, 15 high pressure chamber, 16 discharge valve, 17 old dam ring, 18 slider, 19 feeding part, 20 compression chamber, 30 land part, 40 swing scroll thrust bearing surface, 41 Boss part, 42 thin part, 43, 44 notch part, 50 thrust plate, 51 protrusion wall, 52 oil return pipe, 60 main bearing, 61 subframe, 61a oil pump, 62 auxiliary bearing, 63 oil supply hole, 100, 101, 102 Scroll compressor, A 1st quad, B 2nd quad, C 3rd quad, D 4th quad, S ₁ , S ₂ , S ₃ intervals.

The scroll compressor according to the present invention has a fixed scroll having a fixed base plate provided with a first spiral protrusion portion and a rocking base plate provided with a second spiral protrusion portion that meshes with the first spiral protrusion portion. A swing scroll that forms a compression chamber that compresses the refrigerant between the fixed scroll, a frame that swingably supports the swing scroll, and the fixed scroll, the swing scroll, and the frame. The main body shell is provided, and the fixed scroll and the frame are fixed to the inner wall surface of the main body shell, and the fixed base plate has an assembly phase on a surface facing the frame. A first recess used for feeding is formed, and a second recess used for phase out of assembly is formed in the frame at a position facing the first recess.

Claims (13)

A fixed scroll with a fixed base plate provided with a first spiral protrusion,
A swing scroll having a swing base plate provided with a second spiral protrusion that meshes with the first spiral protrusion, and forming a compression chamber for compressing the refrigerant between the fixed scroll and the swing scroll.
A frame that swingably supports the swing scroll and
A main body shell containing the fixed scroll, the swinging scroll, and the frame is provided.
The fixed scroll and the frame are fixed to the inner wall surface of the main body shell.
The fixed base plate is formed with a first recess on the surface facing the frame.
A scroll compressor in which a second recess is formed in the frame at a position facing the first recess. The scroll compressor according to claim 1, wherein the first recess is formed outside the region of the fixed base plate where the first spiral protrusion is provided. The scroll compressor according to claim 2, wherein a common phasing member is inserted into the first recess and the second recess. The scroll compressor according to any one of claims 1 to 3, wherein the frame is arranged at a target interval between an end surface on a side supporting the swing scroll and the fixed base plate. .. The fixed base plate of the fixed scroll has a land portion that protrudes toward the frame and has the first recess formed therein.
The scroll compressor according to claim 4, wherein the frame is arranged at a distance of the target between an end surface on the side supporting the swing scroll and the land portion. The scroll compressor according to claim 5, wherein the land portion is provided between the land portion and the frame at a distance larger than the plate thickness of the rocking base plate. The land portion is provided between the land portion and the frame at a distance smaller than the plate thickness of the rocking base plate.
The scroll compressor according to claim 5, wherein the rocking base plate is formed with a thin portion that enters a gap provided between the land portion and the frame. The swing base plate has a configuration in which a part of the swing base plate is always inserted between the land portion and the frame in the revolution motion of the swing scroll, or the land portion and the frame in the revolution motion of the swing scroll. The scroll compressor according to claim 6 or 7, wherein a part of the scroll compressor is inserted at least once per revolution. The straight line connecting the central portion of the rocking base plate and the outer end portion of the second spiral protrusion portion is defined as the X-axis, and the straight line passing through the central portion of the rocking base plate and orthogonal to the X-axis is defined as the Y-axis. , The X-axis and the Y-axis are divided into four quadrants, and if the quadrant including the outer end of the second spiral protrusion is the first quadrant, of the second and third quadrants adjacent to the first quadrant. The scroll compressor according to any one of claims 6 to 8, wherein a notch is formed in the rocking base plate located in at least one quadrant. The scroll compressor according to claim 9, wherein the land portion is located in the second quadrant or the third quadrant when projected onto an XY plane including an X-axis and a Y-axis. The scroll compressor according to any one of claims 1 to 10, wherein the first recess is a through hole penetrating the fixed base plate. The main body shell
Cylindrical main shell and
The upper shell that closes the upper surface opening of the main shell and
It has a lower shell that closes the lower surface opening of the main shell.
The scroll compressor according to any one of claims 1 to 11, wherein the fixed scroll and the frame are fixed to an inner wall surface of the main shell. The method for manufacturing a scroll compressor according to claim 1.
The process of fixing the frame to the inner wall surface of the main body shell and
A step of inserting a phase determining member into the first recess and the second recess to determine the phase between the fixed scroll and the frame.
The process of fixing the fixing base plate to the inner wall surface of the main body shell,
A method for manufacturing a scroll compressor, comprising a step of extracting the phasing member from the first recess and the second recess.

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