JP6570930B2 - Rotary compressor and method for manufacturing the same - Google Patents

Description

  The present invention relates to a rotary compressor having a single or plural (two) cylinder chambers and a method for manufacturing the same.

  The key points for improving the efficiency of the rotary compressor are (1) reducing the leakage loss by reducing the cylinder width (thickness) and shortening the axial seal length between the rotor outer peripheral surface and the cylinder inner peripheral surface. (2) Reducing the journal diameter, eccentric shaft diameter, and rotor outer diameter to reduce sliding loss when the rotor rotates, and (3) a multi-cylinder type rotary having a plurality of cylinder chambers. In the case of a compressor, the length of the seal portion between the end face of the separator plate and the end face of the rotor is made as long as possible. However, the structure of the current rotary compressor has the following restrictions, and it has been difficult to design to satisfy all these points.

  A. If the cylinder width (thickness) is reduced, the suction port diameter provided in the cylinder and the suction pipe diameter connected to the suction port are restricted, and the required port diameter and pipe diameter cannot be secured, resulting in a suction pressure loss. Increases and decreases efficiency. In order to cope with this point, as shown in Patent Document 1, a suction port having a long hole in the circumferential direction has been proposed.

  B. In a multi-cylinder type rotary compressor, it is necessary to provide a separator plate between multiple cylinders. However, the diameter of the through-hole that passes through the eccentric shaft provided in the separator plate is a limitation in securing the sealing performance, and it penetrates easily. The hole diameter cannot be increased, which is a limitation in assembling and increasing the eccentric amount of the eccentric shaft portion. Therefore, as shown in Patent Document 2, the through hole diameter of the separator plate and the diameter of the upper and lower eccentric shaft portions are set in a specific relationship, and as shown in Patent Documents 1 and 2, the drive shaft is vertically eccentric. A configuration in which the shaft portion is divided into two parts has been proposed.

  Further, in Patent Document 3, a plurality of cylinders and a separator plate are integrated, and the drive shaft is divided into two parts between the upper and lower eccentric shafts, thereby restricting the suction port and suction pipe diameter. It has been proposed that the design is not subject to separator plate seal restrictions, rotary shaft assembly restrictions, etc., and to achieve higher efficiency and fewer parts.

JP 2010-121481 A Republished Patent No. 2013/057946 JP-A-2015-68211

  However, as shown in Patent Document 1, by making the suction port and the suction pipe connected to the suction port into a long hole or an oval, the cylinder width can be reduced, and the suction port or the suction pipe is disconnected. The area can be secured and the increase in suction pressure loss can be suppressed, but it is not only troublesome to process the suction port and suction pipe into a long hole or oval, but also the short axis dimension of the long hole or ellipse is reduced. Naturally, there is a limit to reducing the suction pressure loss while suppressing an increase in the suction pressure loss, and it has been difficult to reduce the efficiency and performance to a level that can satisfy the decrease in the suction pressure loss.

  Further, Patent Documents 1-3 describe a structure in which the drive shaft is divided into two parts between the eccentric shaft parts in order to alleviate the restrictions on assembly and to secure the seal length between the separator plate and the rotor. Although a structure has been proposed in which an increase in the suction pressure loss is suppressed by providing a single suction port that communicates with each cylinder chamber, and a structure in which the separator plate and the separator plate are integrated. Difficulty in securing the coaxiality by connecting the shafts together, difficulty in manufacturing an integrated structure of the upper and lower cylinders and the separator plate, or making the upper and lower cylinders and the separator plate as separate parts In some cases, it is difficult to form a single suction port in which a part of the suction port is processed and assembled to secure the coaxiality.

  The present invention has been made in view of such circumstances, and can achieve an increase in efficiency by eliminating an increase in suction pressure loss due to a thinner cylinder width (thickness), and is difficult to assemble and manufacture. Accordingly, an object of the present invention is to provide a rotary compressor and a method of manufacturing the same that can be easily assembled while ensuring a coaxial degree even if a suction port extending over a plurality of parts is provided.

In order to solve the above-described problems, the rotary compressor of the present invention and the manufacturing method thereof employ the following means.
That is, the rotary compressor according to the present invention includes a drive shaft having eccentric shaft portions provided at two upper and lower positions in the axial direction at predetermined intervals, and an upper cylinder chamber and a lower cylinder chamber corresponding to the eccentric shaft portion, respectively. An upper cylinder and a lower cylinder, a separator plate provided in close contact with each other between the upper cylinder and the lower cylinder, an upper bearing provided in close contact with an upper surface of the upper cylinder and a lower surface of the lower cylinder, and A single bearing that communicates with the upper cylinder chamber and the lower cylinder chamber, and includes a lower bearing, and an upper rotor and a lower rotor that are fitted to the eccentric shaft portion and rotate in the upper cylinder chamber and the lower cylinder chamber. the induction port, said upper cylinder, the separator plate and set over between 3 parts of the lower cylinder Have been characterized by the extending direction of the cross-section has a shape which is along the same center axis with the same shape.

  According to the present invention, the upper and lower two upper cylinder chambers and the lower cylinder chamber are formed by the upper cylinder, the separator plate, the lower cylinder, the upper bearing and the lower bearing, and a single suction communicated with the upper cylinder chamber and the lower cylinder chamber. Since the port is provided across the three parts of the upper cylinder, the separator plate and the lower cylinder, a general two-cylinder rotary having two upper and lower upper cylinder chambers and a lower cylinder chamber partitioned by the separator plate Even if the cylinder width (thickness) of the upper cylinder and the lower cylinder forming the upper cylinder chamber and the lower cylinder chamber is sufficiently thinned, the suction port diameter can be reduced. And suction pipe diameter are not restricted, and suction pressure loss does not increase The single suction port diameter, so as to communicate with the upper cylinder chamber and a lower cylinder chamber, can be provided upper cylinder, across between 3 parts of the separator plate and the lower cylinder. Therefore, efficiency and performance do not decrease due to suction pressure loss, high efficiency, and there is no need to make the drive shaft in a split structure or the upper and lower cylinders in an integrated structure. A two-cylinder rotary compressor can be provided. Even when a single suction port is provided so as to straddle the three parts of the upper cylinder, the separator plate, and the lower cylinder as described above, by using a method in which they are temporarily assembled and drilled, The coaxiality can be easily secured, and the difficulty of providing a single suction port between three separate parts can be overcome.

  Furthermore, the rotary compressor of the present invention is the above rotary compressor, wherein the single suction port includes the upper bearing and the lower bearing in addition to the three parts of the upper cylinder, the separator plate and the lower cylinder. It is characterized by being provided across five parts to which is added.

  According to the present invention, the single intake port is provided across the five parts including the upper bearing and the lower bearing in addition to the three parts of the upper cylinder, the separator plate, and the lower cylinder. Larger-diameter suction that communicates with the upper cylinder chamber and the lower cylinder chamber by providing a single suction port so as to straddle the upper bearing and the lower bearing that are disposed in close contact with the upper surface and the lower surface of the lower cylinder. A port can be provided. Therefore, it is possible to provide a two-cylinder rotary compressor that is highly efficient, has good assemblability, and is easy to manufacture without reducing efficiency and performance due to suction pressure loss. Even when a single suction port is provided so as to straddle the above five parts, the coaxiality after assembly can be easily ensured by using a method of temporarily assembling them and drilling them. The difficulty of providing a single suction port between the five separate parts can be overcome.

Furthermore, a rotary compressor according to the present invention includes a drive shaft having an eccentric shaft portion provided at a predetermined position in the axial direction, a cylinder that forms a single cylinder chamber corresponding to the eccentric shaft portion, and the cylinder An upper bearing and a lower bearing provided in close contact with an upper surface and a lower surface of the motor, and a rotor that is fitted to the eccentric shaft portion and rotates in the cylinder chamber, and communicates with the single cylinder chamber. The suction port is provided across the three parts of the upper bearing, the cylinder and the lower bearing, and has a cross-section in the extending direction having the same shape and a shape along the same central axis. It is characterized by.

  According to the present invention, a single cylinder chamber is formed by a cylinder, an upper bearing, and a lower bearing, and a single suction port that communicates with the single cylinder chamber is between three parts of the upper bearing, the cylinder, and the lower bearing. Since it is provided across the cylinder, it can be assembled in the same manner as a general single-cylinder rotary compressor having a single cylinder chamber, and the width (thickness of the cylinder forming the single cylinder chamber) The suction port diameter and suction pipe diameter are not restricted by this even if the width is sufficiently thinned, and a single suction port with a large diameter that does not increase suction pressure loss It can be provided across the three parts of the upper bearing, the cylinder and the lower bearing so as to communicate with the cylinder chamber. Therefore, it is possible to provide a single-cylinder rotary compressor that is highly efficient, has good assemblability, and is easy to manufacture without reducing efficiency and performance due to suction pressure loss. Even when a single suction port is provided so as to straddle the three parts of the cylinder, the upper bearing, and the lower bearing as described above, by using a method in which they are temporarily assembled and drilled, The degree can be easily secured, and the difficulty of providing a single suction port between three separate parts can be overcome.

  Furthermore, the method for manufacturing a rotary compressor according to the present invention is the method for manufacturing a rotary compressor according to any one of the above, wherein the three parts, the five parts, or the single cylinder chamber constituting the plurality of cylinder chambers. A step of temporarily assembling each of the three parts constituting the step, a step of drilling a single suction port between the plurality of components in the temporarily assembled state, and a step of drilling the suction port And a step of disassembling each of the plurality of parts for each part, and assembling a rotary compressor including the plurality of parts according to a predetermined order.

  According to the present invention, in any one of the above rotary compressor manufacturing methods, three or five parts constituting a plurality of cylinder chambers, or three parts constituting a single cylinder chamber are each temporarily assembled, A single suction port that spans multiple parts in the state is drilled, and after processing the suction port, each part in the temporarily assembled state is disassembled for each part, and a rotary compressor including these parts is provided. Since the cylinders are assembled according to a predetermined order, even if the cylinder width (thickness) of the cylinders forming each cylinder chamber is sufficiently thinned, the suction port diameter is not restricted thereby, A single suction port having a large diameter that does not increase pressure loss can be provided across a plurality of parts so as to communicate with each cylinder chamber. Therefore, it is possible to provide a rotary compressor that is highly efficient, has good assemblability, and is easy to manufacture, with no reduction in efficiency and performance due to suction pressure loss. In addition, even when a single suction port is provided so as to straddle a plurality of parts, a plurality of parts forming each cylinder chamber are temporarily assembled, and after a single suction port is drilled in that state, By disassembling the parts of each part and assembling the rotary compressor containing these parts according to a predetermined order, the coaxiality after assembly can be easily secured, and a single suction port is provided between different parts. Can overcome the difficulties.

  According to the rotary compressor of the present invention, it can be assembled in the same manner as a general two-cylinder rotary compressor having two upper and lower upper cylinder chambers and a lower cylinder chamber partitioned by a separator plate. Even if the cylinder widths (thicknesses) of the upper and lower cylinders forming the cylinder chamber and lower cylinder chamber are sufficiently reduced, the suction port diameter and the suction pipe diameter are not restricted thereby. Since a single large-diameter suction port that does not increase the pressure can be provided across the three parts of the upper cylinder, the separator plate, and the lower cylinder so as to communicate with the upper cylinder chamber and the lower cylinder chamber, The efficiency and performance do not deteriorate due to suction pressure loss, and it is highly efficient. You do not need or an integral structure of da may be assembling property is good at manufacturing to provide easy two-cylinder type rotary compressor.

  Further, according to the rotary compressor of the present invention, it can be assembled in the same manner as a general single cylinder type rotary compressor having a single cylinder chamber, and the cylinder forming the single cylinder chamber can be assembled. Even if the width (thickness) is made sufficiently thin, the suction port diameter and suction pipe diameter are not restricted thereby, and a single suction port with a large diameter that does not increase suction pressure loss, Since it can be provided across the three parts of the upper bearing, the cylinder and the lower bearing so as to communicate with a single cylinder chamber, the efficiency and performance do not decrease due to suction pressure loss, In addition, it is possible to provide a single cylinder type rotary compressor that is easy to assemble and easy to manufacture.

  In addition, according to the method for manufacturing a rotary compressor of the present invention, even if the cylinder width (thickness) of the cylinder forming each cylinder chamber is sufficiently thinned, the suction port diameter may be restricted thereby. In addition, since a single suction port with a large diameter that does not increase suction pressure loss can be provided across a plurality of parts so as to communicate with each cylinder chamber, efficiency and performance are reduced due to suction pressure loss. In addition to being able to provide a rotary compressor that is highly efficient, easy to assemble, and easy to manufacture, even when a single suction port is provided across multiple parts, After temporarily assembling a plurality of parts forming the cylinder chamber and drilling a single suction port in that state, each part is disassembled into parts, and a rotary compressor including these parts is set as a predetermined compressor. By assembling accordance mechanisms, it can be secured concentricity after assembly easily, it is possible to overcome the difficulty of providing a single suction port between separate multiple components.

It is a longitudinal cross-sectional view of the principal part of the rotary compressor which concerns on 1st Embodiment of this invention. It is a perspective view which shows typically the suction port structure of the said rotary compressor. FIG. 3 is an exploded perspective view of FIG. 2. It is a perspective view which shows typically the suction port structure of the rotary compressor concerning a 2nd embodiment of the present invention. FIG. 5 is an exploded perspective view of FIG. 4. It is a perspective view which shows typically the suction port structure of the rotary compressor concerning a 3rd embodiment of the present invention. FIG. 7 is an exploded perspective view of FIG. 6.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is a longitudinal sectional view of a rotary compressor according to a first embodiment of the present invention, FIG. 2 is a perspective view schematically showing the suction port structure, and FIG. 3 is an exploded perspective view of FIG. It is shown.
The rotary compressor 1 of the present embodiment is a case where the present invention is applied to a multi-cylinder rotary compressor, and here, a two-cylinder sealed rotary compressor 1 having two cylinders is illustrated. Has been.

  The rotary compressor 1 includes a cylindrical hermetic housing 2, and is a rotary that is driven via a drive shaft (crankshaft) 3 by an electric motor (not shown) provided in an upper portion of the hermetic housing 2. The compression mechanism 8 is configured to be installed at a lower portion in the hermetic housing 2. The drive shaft (crankshaft) 3 is coupled to the rotor of the electric motor at the upper side, and is driven to rotate by the electric motor. The upper eccentric shaft portion (crank portion) 4 and the lower eccentric shaft portion ( Crank portions) 5 are provided at two positions above and below at a predetermined interval with a phase difference of 180 °. The drive shaft 3 is provided with an intermediate shaft portion 6 between the upper and lower eccentric shaft portions 4, 5, and a bearing support portion 7 extending downward at the lower portion of the lower eccentric shaft portion 5.

  The rotary compression mechanism 8 includes an upper cylinder 10 that forms an upper cylinder chamber 9 corresponding to the upper eccentric shaft portion 4, a lower cylinder 12 that forms a lower cylinder chamber 11 corresponding to the lower eccentric shaft portion 5, and an upper cylinder. 10 and the lower cylinder 12, a separator plate 13 for partitioning the upper cylinder 10, an upper bearing 14 provided on the upper surface of the upper cylinder 10, and a lower bearing 15 provided on the lower surface of the lower cylinder 12. The upper rotor 16 that is freely fitted is rotatable in the upper cylinder chamber 9, and the lower rotor 17 that is rotatably fitted to the lower eccentric shaft portion 5 is rotatable in the lower cylinder chamber 11. It is said that. The separator plate 13 is provided with a through hole 18 through which the drive shaft 3 passes.

  The upper cylinder chamber 9 forms a sealed space by sealing the upper and lower surfaces of the upper cylinder 10 with the upper bearing 14 and the separator plate 13, and the lower cylinder chamber 11 forms the upper and lower surfaces of the lower cylinder 12 with the lower bearing 15. A sealed space is formed by sealing with the separator plate 13. As is well known, the upper cylinder chamber 9 and the lower cylinder chamber 11 are fitted in vane grooves provided in the upper cylinder 10 and the lower cylinder 12 so as to be slidable in the radial direction, and the tip portions are held by vane presser springs. The suction side and the discharge side are partitioned by vanes pressed against the outer peripheral surfaces of the upper rotor 16 and the lower rotor 17, respectively.

  The upper bearing 14 and the lower bearing 15 rotatably support the drive shaft 3 with a bearing support portion 7 extending downward from the upper portion of the upper eccentric shaft portion 4 and the lower portion of the lower eccentric shaft portion 5. In the present embodiment, the upper bearing 14 is fixedly installed at a plurality of locations on the inner peripheral surface of the sealed housing 2 by plug welding or the like, and the upper cylinder 10, the lower cylinder 12, the separator plate 13, and the lower bearing with respect to the upper bearing 14. The rotary compression mechanism 8 is fixedly installed in the hermetic housing 2 by integrally fastening and fixing 15 etc. via a plurality of bolts and nuts 19.

  In the present embodiment, the rotary bearing 8 is fixedly installed in the sealed housing 2 by fixing the upper bearing 14 in the sealed housing 2 and fastening and fixing other components integrally therewith. However, one or both of the upper cylinder 10 and the lower cylinder 12 is fixedly installed in the sealed housing 2, and the other components are fixed thereto, so that the rotary compression mechanism 8 is fixedly installed in the sealed housing 2. Also good.

  Also, on the outer surfaces of the upper bearing 14 and the lower bearing 15, covers 22, 23 forming discharge chambers 20, 21 into which high-pressure gas compressed in the upper cylinder 10 and the lower cylinder 12 is discharged are the bolts. -It is fastened and fixed via a nut 19. The high-pressure gas discharged into the discharge chambers 20 and 21 is discharged from the discharge chamber 20 into the sealed housing 2 and joined, and then discharged from the upper portion of the sealed housing 2 to the outside of the compressor.

  The rotary compression mechanism 8 configured as described above is not fundamentally different from a compression mechanism of a known two-cylinder rotary compressor. The compression mechanism of the conventional two-cylinder rotary compressor is based on the upper cylinder 10 and the lower cylinder 12 with respect to the lower cylinder chamber 11 provided in the upper cylinder chamber 9 and the lower cylinder 12 provided in the upper cylinder 10. Normally, a suction port is provided separately, and two suction pipes branched by an accumulator are individually connected to each suction port. In this embodiment, however, two upper cylinder chambers 9 and The refrigerant gas suction system for the lower cylinder chamber 11 is configured as follows.

  As described above, the upper bearing 14, the upper cylinder 10, the separator plate 13, the lower cylinder 12, and the lower bearing 15 are brought into close contact with each other, and are fixed to the upper and lower two upper cylinder chambers 9 and 11 formed by fastening them. Refrigerant gas that has passed through an accumulator is provided by providing a single suction port 24 that extends between the three parts of the upper cylinder 10, the separator plate 13, and the lower cylinder 12 that communicates with each other, and connecting a suction pipe 25 to the suction port 24. Can be inhaled at the same time.

  Thus, by piercing the single suction port 24 between the three parts of the upper cylinder 10, the separator plate 13 and the lower cylinder 12, the upper cylinder 10 and the Without being restricted by the cylinder width (thickness) of the lower cylinder 12, the large-diameter suction port 24 having a sufficiently large flow path cross-sectional area can be formed. That is, in order to increase the efficiency of the rotary compressor 1, even if the upper cylinder 10 and the lower cylinder 12 are made thinner, the diameter of the suction port is reduced accordingly, or the suction port is made larger by making it a special hole such as a long hole. Even if the suction port 24 has a large diameter, the suction pressure loss at the suction port 24 and the suction pipe 25 can be reduced or eliminated.

  In addition, as described above, when the single suction port 24 is provided so as to straddle the three parts of the upper cylinder 10, the separator plate 13, and the lower cylinder 12, a part of the suction port 24 is individually divided into each part. If each part is individually processed and then joined together to form a single suction port 24, it becomes difficult to ensure the coaxiality of the suction port 24. As shown in FIG. 2, three parts are temporarily assembled, and in that state, a single suction port 24 is drilled by machining, and then each part is disassembled into parts, and a rotary compressor including these three parts If 1 is assembled according to a predetermined order, the coaxiality can be easily secured.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
In the rotary compressor 1, the low pressure refrigerant gas sucked into the upper cylinder chamber 9 and the lower cylinder chamber 11 from the suction pipe 25 through the suction port 24 is driven to rotate, and the upper cylinder chamber is accordingly driven. The upper rotor 16 and the lower rotor 17 are compressed on the inner peripheral surfaces of the lower cylinder chamber 11 and the lower cylinder chamber 11 by eccentric rotation. Then, the gas compressed to the set pressure is discharged into the upper and lower discharge chambers 20 and 21 through a discharge valve and a discharge port (not shown), and then discharged into the sealed housing 2 and merged, and then sealed. It is sent from the upper part of the housing 2 to the outside of the compressor (refrigeration cycle).

  In such a multi-cylinder rotary compressor, as described above, leakage loss can be reduced by reducing the cylinder width (thickness). However, when the cylinder width is reduced, the suction port diameter and the suction pipe diameter are reduced. It is constrained and the efficiency decreases due to increased suction pressure loss. However, in the present embodiment, the upper and lower two upper cylinder chambers 9 and the lower cylinder chamber 11 are formed by the upper cylinder 10, the separator plate 13, the lower cylinder 12, the upper bearing 14 and the lower bearing 15, and the upper cylinder chamber 9 and As shown in FIGS. 2 and 3, a single suction port 24 that communicates with the lower cylinder chamber 11 is provided across three parts of the upper cylinder 10, the separator plate 13, and the lower cylinder 12. Yes.

  Therefore, the upper cylinder chamber 9 can be assembled in the same manner as a general two-cylinder rotary compressor including the upper and lower two upper cylinder chambers 9 and the lower cylinder chamber 10 partitioned by the separator plate 13. Even if the cylinder widths (thicknesses) of the upper cylinder 10 and the lower cylinder 12 forming the lower cylinder chamber 11 are sufficiently reduced, this restricts the diameter of the suction port 24 and the diameter of the suction pipe 25. The upper cylinder 10, the separator plate 13, and the lower cylinder 12 are connected so that a single suction port 24 having a large diameter that does not increase suction pressure loss and communicates with the upper cylinder chamber 9 and the lower cylinder chamber 11. It can be provided across the parts.

  Therefore, the efficiency and performance do not deteriorate due to the suction pressure loss, the efficiency is high, and the drive shaft 3 does not need to be divided or the upper and lower cylinders need to be integrated. An easy two-cylinder rotary compressor 1 can be provided.

  Further, even when the single suction port 24 is provided so as to straddle the three parts of the upper cylinder 10, the separator plate 13, and the lower cylinder 12 as described above, these three parts are temporarily assembled as shown in FIG. Then, the suction port 24 is drilled by machining, etc., and then each part is disassembled into parts, and a rotary compressor including these three parts is assembled according to a predetermined order. The coaxiality of 24 can be easily secured, and the difficulty of providing a single suction port 24 between three separate parts can be overcome.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
This embodiment differs from the first embodiment described above in that the suction port 34 is provided across five parts including the upper bearing 14 and the lower bearing 15. Since other points are the same as those in the first embodiment, description thereof will be omitted.
In this embodiment, as shown in FIG. 4 and FIG. 5, a single suction port 34 is provided in addition to the three parts of the upper cylinder 10, the separator plate 13 and the lower cylinder 12, and the upper bearing 14 and the lower bearing 15. It is the structure provided over the added five parts.

  Since a single suction port 34 is provided so as to straddle the above five parts, as shown in FIG. 4, the five parts of the upper cylinder 10, the separator plate 13, the lower cylinder 12, the upper bearing 14, and the lower bearing 15 are provided. Are temporarily assembled, and the suction port 34 is drilled by machining or the like in this state. Then, as shown in FIG. 5, each part is disassembled into parts, and the rotary compressor 1 including these five parts is fixed. By assembling according to the order, the two-cylinder rotary compressor 1 having a single suction port 34 having a larger diameter and communicating with the upper and lower two upper cylinder chambers 9 and the lower cylinder chamber 11 can be manufactured.

  Therefore, according to the present embodiment, as in the first embodiment, the efficiency and performance are not reduced by the suction pressure loss, the efficiency is high, and the drive shaft 3 is divided, or the upper and lower cylinders are integrated. Therefore, it is possible to provide a two-cylinder rotary compressor 1 that is easy to manufacture and easy to assemble. Further, the coaxiality of the suction port 24 after assembly can be easily ensured, and the difficulty of providing a single suction port 24 between the five separate parts can be overcome.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS.
The present embodiment is different from the first and second embodiments described above in that the cylinder is applied to a single cylinder type rotary compressor 1. Since other points are the same as those in the first embodiment, description thereof will be omitted.
The rotary compressor 1 of the present embodiment is a single cylinder type rotary compressor with one cylinder. As shown in FIGS. 6 and 7, the single-cylinder rotary compressor 1 includes a single cylinder 40 that forms a cylinder chamber 41, and an upper bearing 14 and a lower bearing 15 are closely arranged on the upper and lower surfaces thereof. As a result, a cylinder chamber 41 which is a sealed space is formed.

In the case of the single cylinder type rotary compressor 1, the eccentric shaft portion provided in the drive shaft 3 corresponding to the single cylinder 40 is also one place (for example, only the upper eccentric shaft portion 4), and the eccentric shaft thereof. One rotor (for example, only the rotor 16) is fitted to the portion 4. Needless to say, the discharge chamber may be provided at any one of the upper and lower positions.
A large diameter straddling the three parts of the upper bearing 14, the cylinder 40 and the lower bearing 15 so as to communicate with a single cylinder chamber 41 formed by the three parts of the upper bearing 14, the cylinder 40 and the lower bearing 15. A single suction port 44 is provided.

  Further, when the single suction port 44 is provided across the three parts of the upper bearing 14, the cylinder 40, and the lower bearing 15, as in the first and second embodiments, three parts are shown in FIG. Drilling is performed in the temporarily assembled state, and then the three parts are disassembled into parts, and the rotary compressor 1 including these three parts may be assembled according to a predetermined order.

  Thus, in the single cylinder type rotary compressor 1, a single cylinder chamber 41 is formed by one cylinder 40, the upper bearing 14 and the lower bearing 15, and the single cylinder chamber 41 communicates with the single cylinder chamber 41. One suction port 44 is provided across the three parts of the upper bearing 14, the cylinder 40 and the lower bearing 15. For this reason, it can be assembled in the same manner as a general single cylinder type rotary compressor 1 having a single cylinder chamber 41, and the width of the cylinder 40 forming the single cylinder chamber 41 is sufficiently thin. Even if the width is increased, the diameter of the suction port 44 and the diameter of the suction pipe 25 are not restricted thereby, and the single suction port 44 having a large diameter that does not increase the suction pressure loss is communicated with the cylinder chamber 41. As described above, the upper bearing 14, the cylinder 40, and the lower bearing 15 can be provided across three parts.

  As a result, as in the first and second embodiments, the single-cylinder rotary compressor 1 is highly efficient, has good assemblability, and is easy to manufacture without reducing efficiency and performance due to suction pressure loss. Can be provided. Further, even when the single suction port 44 is provided so as to straddle the three parts of the cylinder 40, the upper bearing 14 and the lower bearing 15 as described above, by using a method of temporarily assembling them and drilling them, The coaxiality of the suction port 44 after assembly can be easily ensured, and the difficulty of providing a single suction port 44 between three separate parts can be overcome.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above-described embodiment, an example in which the upper bearing 14 is fixedly installed on the hermetic housing 2 by plug welding has been described. However, the upper bearing 14 may be fixedly installed by welding or caulking other than plug welding. Further, when other components are fastened and fixed to the upper bearing 14 and the cylinders 10, 12, and 40 to which the hermetic housing 2 is fixed, it is not always necessary to be a through-bolt. It may be fixedly installed.

  In each of the above embodiments, when a plurality of parts are temporarily assembled and a single suction port 24, 34, 44 is drilled, a temporary assembly is appropriately performed using a tightening jig or the like. Process it.

DESCRIPTION OF SYMBOLS 1 Rotary compressor 3 Drive shaft 4 Upper eccentric shaft part 5 Lower eccentric shaft part 9 Upper cylinder chamber 10 Upper cylinder 11 Lower cylinder chamber 12 Lower cylinder 13 Separator plate 14 Upper bearing 15 Lower bearing 16 Upper rotor 17 Lower rotor 24,34, 44 Suction port 40 Cylinder 41 Cylinder chamber

Claims (6)

A drive shaft having eccentric shaft portions provided at two positions above and below at predetermined intervals in the axial direction;
An upper cylinder and a lower cylinder that respectively form an upper cylinder chamber and a lower cylinder chamber corresponding to the eccentric shaft portion;
A separator plate provided in close contact with each other between the upper cylinder and the lower cylinder;
An upper bearing and a lower bearing provided in close contact with the upper surface of the upper cylinder and the lower surface of the lower cylinder;
An upper rotor and a lower rotor that are fitted to the eccentric shaft portion and rotate in the upper cylinder chamber and the lower cylinder chamber;
A single suction port that communicates with the upper cylinder chamber and the lower cylinder chamber is provided across three parts of the upper cylinder, the separator plate, and the lower cylinder, and has the same cross-section in the extending direction. And a rotary compressor having a shape along the same central axis .   The single suction port is provided across five parts including the upper bearing and the lower bearing in addition to the three parts of the upper cylinder, the separator plate and the lower cylinder. The rotary compressor according to claim 1. A drive shaft having an eccentric shaft portion provided at a predetermined position in the axial direction;
A cylinder forming a single cylinder chamber corresponding to the eccentric shaft portion;
An upper bearing and a lower bearing provided in close contact with the upper and lower surfaces of the cylinder;
A rotor fitted into the eccentric shaft portion and rotating in the cylinder chamber,
The single suction port that communicates with the single cylinder chamber is provided across the three parts of the upper bearing, the cylinder, and the lower bearing, and has the same cross-section in the extending direction and the same shape. A rotary compressor characterized by having a shape along the central axis . In the manufacturing method of the rotary compressor according to claim 1 ,
A step of temporarily assembling each of the three parts of articles constituting the plurality of cylinder chambers,
Drilling a single suction port spanning the three parts in the temporarily assembled state;
Disassembling the three parts into parts after drilling the suction port;
And assembling the rotary compressor including the three parts according to a predetermined order. In the manufacturing method of the rotary compressor according to claim 2,
Temporarily assembling the five parts constituting the plurality of cylinder chambers;
Drilling the single suction port spanning between the five parts in the temporarily assembled state;
Disassembling the five parts for each part after drilling the suction port;
And assembling the rotary compressor including the five parts according to a predetermined order. In the manufacturing method of the rotary compressor according to claim 3,
Temporarily assembling each of the three parts constituting the single cylinder chamber;
Drilling a single suction port spanning the three parts in the temporarily assembled state;
Disassembling the three parts into parts after drilling the suction port;
And assembling the rotary compressor including the three parts according to a predetermined order.

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