WO2016059873A1

WO2016059873A1 - Bracket for compressor, and rotary compressor

Info

Publication number: WO2016059873A1
Application number: PCT/JP2015/073419
Authority: WO
Inventors: 俊輔藥師寺; 小川　真
Original assignee: 三菱重工業株式会社
Priority date: 2014-10-16
Filing date: 2015-08-20
Publication date: 2016-04-21
Also published as: JP2016079886A; EP3173626A4; CN106795886A; EP3173626A1; JP6508807B2

Abstract

A bracket for a compressor is provided with: a base (31) affixed to the outer peripheral surface of a housing (11); a pair of arms (32A, 32B) provided so as to extend in a tilted manner from the opposite ends of the base (31) toward the outside thereof; and contact sections (33) each provided at the end of a corresponding one of the arms (32A, 32B), which is located opposite the end of the arm (32A, 32B) where the arm (32A, 32B) is connected to the base (31). The contact sections (33) have formed thereat bends (33A, 33B) at which the pair of arms (32A, 32B) bends outward in the direction in which the pair of arms (32A, 32B) extends away from each other.

Description

Compressor bracket and rotary compressor

The present invention relates to a bracket for a compressor and a rotary compressor.
This application claims priority on Japanese Patent Application No. 2014-2111810 filed on Oct. 16, 2014, the contents of which are incorporated herein by reference.

2. Description of the Related Art Conventionally, as a rotary compressor used in an air conditioner, a refrigerator, or the like, as described in Patent Document 1, for example, a cylinder and a piston provided in the cylinder and provided with eccentric rotation by an eccentric amount of an eccentric shaft portion And a rotor. In this rotary compressor, a structure in which two cylinders are separated by a separator is known.

As shown in FIG. 8, such a rotary compressor 100 has a structure in which an accumulator 103 is attached to the outer peripheral surface of a housing 101 constituting a sealed container via a bracket 102. The bracket 102 includes a base portion 106, and a pair of arm portions 104 and arm portions 104 provided so as to be inclined from both ends of the base portion 106 toward the outside of the base portion 106. Each arm 104 is provided with a locking surface 104 a that coincides with the outer peripheral surface 103 a of the accumulator 103. The bracket 102 has the engaging surface 104a of the arm portion 104 brought into contact with the outer peripheral surface 103a of the accumulator 103 to bring it into surface contact, and the end portion of the band member 105 around which the outer peripheral surface 103a of the accumulator 103 is wound is a pair of arm portions. Lock to the tip of 104. Thereby, the bracket 102 is configured to fix the accumulator 103 to the housing 101.

JP-A-9-250477

However, in the conventional rotary compressor, when the excitation force due to the operation of the compressor is transmitted to the accumulator, the accumulator may vibrate and emit noise. This excitation force is estimated as a motor magnetic excitation force and a pulsation excitation force. Except for the suction pulsation, the excitation force is generated from the compressor body. For this reason, it is necessary to suppress vibration propagation from the compressor body.

The connecting portion between the accumulator and the compressor main body is only the bracket 102 as shown in FIG. 8 and the suction pipe bent into an L shape, and it is difficult to change the structure of the suction pipe.
In the conventional structure as shown in FIG. 8, the outer peripheral surface 103 a of the accumulator 103 is in surface contact with the locking surface 104 a of the arm portion 104 of the bracket 102. Therefore, both contact areas are large, and the vibration transmission rate of the compressor body becomes large, so there is room for improvement in that respect.

The present invention provides a compressor bracket and a rotary compressor that can effectively suppress the generation of vibration and noise from the accumulator by reducing the contact area of the compressor bracket.

In the compressor bracket according to the first aspect of the present invention, a base, a pair of arms provided to be inclined from both ends of the base toward the outside of the base, and the base of the arm And a contact portion provided on the side opposite to the connection side, and the contact portion is formed with a bent portion.

According to such a configuration, with the base portion fixed to either the compressor main body or the accumulator, the tip of the bent portion formed on the contact portion of the arm portion can be brought into contact with the other outer peripheral surface and attached. . Thereby, a bending part becomes a line contact with respect to the said outer peripheral surface, and a contact area can be reduced compared with the case of a surface contact. Therefore, the vibration transmission rate from the compressor body to the accumulator can be kept small. Therefore, the vibration of the accumulator can be reduced, and the radiated sound generated from the accumulator can be reduced.

In the compressor bracket according to the second aspect of the present invention, in the first aspect, the bent portion is preferably curved toward the outside where the pair of arm portions are separated from each other.

In this case, for example, a band member wound around the outer peripheral surface of the accumulator can be connected to the bent portion bent outward, and can be more reliably attached to the accumulator.

In the compressor bracket according to the third aspect of the present invention, in the first or second aspect, the contact portion is preferably provided with a convex portion.

In this case, the convex portion provided in the contact portion can be attached in contact with the outer peripheral surface of either the compressor main body or the accumulator. Thereby, a convex part becomes a point contact with respect to the said outer peripheral surface, and a contact area can be reduced compared with the case of surface contact. Therefore, the vibration transmissibility from the compressor body to the accumulator can be kept small, the accumulator vibration can be reduced, and the radiated sound generated from the accumulator can be reduced.

In the compressor bracket according to the fourth aspect of the present invention, in the first or second aspect, the contact portion is preferably provided with a notch.

In this case, the portion left by the notch provided in the contact portion can be attached in contact with the outer peripheral surface of either the compressor body or the accumulator. Thereby, the contact area with respect to the said outer peripheral surface can be reduced compared with the case of surface contact. Therefore, the vibration transmissibility from the compressor body to the accumulator can be kept small, the accumulator vibration can be reduced, and the radiated sound generated from the accumulator can be reduced.

In the compressor bracket according to the fifth aspect of the present invention, in any one of the first to fourth aspects, it is preferable that the arm portion is provided with a rib.

In this case, the rigidity of the arm can be increased by the rib, and in particular, it can cope with the low-frequency excitation force.

A rotary compressor according to a sixth aspect of the present invention is a rotary compressor using the compressor bracket according to any one of the first to fourth aspects, and includes a compressor body and an accumulator, The compressor body and the accumulator are disposed inside the band member, the compressor bracket, a band member connected to a bent portion of the compressor bracket and wound around an outer peripheral surface of the accumulator Connected by the elastic sheet.

According to such a configuration, the compressor bracket is fixed to the accumulator by connecting the belt member wound around the outer peripheral surface of the accumulator to the bent portion of the compressor bracket. In this state, since the elastic sheet is disposed inside the belt member, the vibration of the accumulator can be reduced by shear deformation of the elastic sheet, and the radiated sound generated from the accumulator can be reduced.

In the rotary compressor according to the seventh aspect of the present invention, in the sixth aspect, it is preferable that the arm portion is attached to the base portion with an inclination in contact with a tangential direction of the accumulator.

In this case, it can be attached so that the outer peripheral part of the accumulator is sandwiched between the pair of arms of the compressor bracket. Also in this case, the vibration of the accumulator can be reduced by the shear deformation of the elastic sheet as described above. Since the inclined portion of the arm portion extends in the tangential direction of the accumulator, the inclined portion is orthogonal to the radial direction of the accumulator. Therefore, vibration in the radial direction of the accumulator can be effectively suppressed. Thereby, the suppression effect of a vibration can be exhibited especially in a concentrated winding motor having a large radial vibration.

According to the compressor bracket and the rotary compressor of the present invention, it is possible to effectively suppress the generation of vibration and noise from the accumulator by reducing the contact area of the compressor bracket.

It is a longitudinal cross-sectional view of the compressor provided with the accumulator by the 1st Embodiment of this invention. It is a principal part perspective view of the compressor shown in FIG. It is a top view which shows the structure of a compressor. It is a perspective view which shows the structure of the bracket shown in FIG. It is a top view which shows the structure of the compressor by 2nd Embodiment, Comprising: It is a figure corresponding to FIG. It is the perspective view which showed the structure of the bracket by 3rd Embodiment, Comprising: It is a figure corresponding to FIG. It is the perspective view which showed the structure of the bracket by 4th Embodiment, Comprising: It is a figure corresponding to FIG. It is a top view which shows the principal part of the conventional compressor.

Hereinafter, a bracket for a compressor and a rotary compressor according to an embodiment of the present invention will be described with reference to the drawings. This embodiment shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention.

(First embodiment)
As shown in FIG. 1, the rotary compressor of the present embodiment (hereinafter simply referred to as compressor 1) includes a compressor body 10 and an accumulator 2. The compressor body 10 includes a disk-shaped cylinder 20 A and a cylinder 20 B provided in two upper and lower stages in a cylindrical sealed housing 11 having a central axis in the vertical direction. The compressor body 10 is a so-called two-cylinder type. A cylindrical cylinder inner wall surface 20S having an axis in the vertical direction is formed at the center of the pair of

cylinders

20A and 20B.

A cylindrical piston rotor 21A and a piston rotor 21B having an outer diameter smaller than the inner diameter of the cylinder inner wall surface 20S are arranged inside the cylinder 20A and the cylinder 20B. Each of the piston rotor 21 A and the piston rotor 21 B is inserted and fixed to the eccentric shaft portion 23 A and the eccentric shaft portion 23 B of the shaft 22 along the central axis of the housing 11. Thus, spaces R each having a crescent-shaped cross section are formed between the cylinder inner wall surfaces 20S of the

cylinders

20A and 20B and the outer peripheral surfaces of the piston rotor 21A and the piston rotor 21B.
Here, the upper-stage piston rotor 21 A and the lower-stage piston rotor 21 B are provided so that their phases are different from each other.
Further, a disc-shaped separator 24 is provided between the upper and

lower cylinders

20A and 20B. The separator 24 partitions the space R in the upper cylinder 20A and the space R in the lower cylinder 20B into the compression chamber R1 and the compression chamber R2 without communicating with each other.

The upper and

lower cylinders

20A and 20B are provided with blades (not shown) that divide the compression chamber R1 and the compression chamber R2 into two, respectively. In each of the cylinder 20A and the cylinder 20B, the blade advances and retreats in a direction approaching or separating from the piston rotor 21A and the piston rotor 21B in an insertion groove formed extending in the radial direction of the cylinder 20A and the cylinder 20B. It is held freely. The rear end of the blade is pressed by a coil spring. Therefore, the tip of the blade is always pressed against the piston rotor 21A and the piston rotor 21B.

As shown in FIG. 1, the shaft 22 is rotatably supported around its axis by upper and

lower bearings

26A and 26B fixed to the upper and

lower cylinders

20A and 20B by bolts.
An eccentric shaft portion 23A and an eccentric shaft portion 23B that are offset in a direction orthogonal to the central axis of the shaft 22 are formed on the shaft 22 inside the piston rotor 21A and the piston rotor 21B. The eccentric shaft portion 23A and the eccentric shaft portion 23B have outer diameters slightly smaller than the inner diameters of the piston rotor 21A and the piston rotor 21B. Accordingly, when the shaft 22 rotates, the eccentric shaft portion 23A and the eccentric shaft portion 23B rotate around the central axis of the shaft 22, and the upper and

lower piston rotors

21A and 21B are eccentrically rolled in the cylinder 20A and the cylinder 20B. To do. At this time, since the blade is pressed by the coil spring, the tip portion follows the movement of the piston rotor 21A and the piston rotor 21B, and is always pressed against the piston rotor 21A and the piston rotor 21B.

The shaft 22 extends upward from the bearing 26A. A rotor 41 of a motor 40 for rotating the shaft 22 is provided on the protruding portion of the shaft 22. A stator 42 is fixed to the inner peripheral surface of the housing 11 so as to face the outer peripheral portion of the rotor 41.

The opening part 12A and the opening part 12B are formed in the position which opposes the outer peripheral surface of the cylinder 20A and the cylinder 20B in the side of the housing 11, respectively. In the cylinder 20A and the cylinder 20B,

suction ports

30A and 30B communicating with a predetermined position of the cylinder inner wall surface 20S are formed at positions facing the opening 12A and the opening 12B.

An accumulator 2 for gas-liquid separation of refrigerant before being supplied to the compressor body 10 is fixed to the housing 11 via a compressor bracket (hereinafter simply referred to as a bracket 3).
The accumulator 2 is provided with a suction pipe 2A and a suction pipe 2B for allowing the refrigerant in the accumulator 2 to be sucked into the compressor body 10. The distal ends of the suction pipe 2A and the suction pipe 2B are connected to the suction port 30A and the suction port 30B through the opening 12A and the opening 12B, respectively.

In such a compressor 1, the refrigerant is taken into the accumulator 2 from the suction port 2 a, and the refrigerant is gas-liquid separated in the accumulator 2. In the compressor 1, the gas phase after gas-liquid separation is compressed from the suction pipe 2A and the suction pipe 2B via the cylinder 20A and the suction port 30A and the suction port 30B of the cylinder 20B, and is a compression chamber that is an internal space of the cylinder 20A and the cylinder 20B. Supply to R1 and compression chamber R2.
Due to the eccentric rolling of the piston rotor 21A and the piston rotor 21B, the volumes of the compression chamber R1 and the compression chamber R2 are gradually reduced and the refrigerant is compressed. Discharge holes (not shown) for discharging the refrigerant are formed at predetermined positions of the

cylinders

20A and 20B. The discharge hole is provided with a reed valve (not shown). Thereby, when the pressure of the compressed refrigerant increases, the reed valve is pushed open, and the refrigerant is discharged to the outside of the cylinder 20A and the cylinder 20B. The discharged refrigerant is discharged from a discharge pipe 27 provided at the top of the housing 11 to an external pipe (not shown).

Next, the structure of the bracket 3 for fixing the accumulator 2 to the outer peripheral surface of the compressor body 10 (housing 11) will be described in detail based on the drawings.
As shown in FIGS. 2 to 4, the bracket 3 is a plate-like member having a substantially hat shape. The bracket 3 includes a base 31 that is fixed to the outer peripheral surface of the housing 11, a pair of

arm portions

32A and 32B that are inclined from both ends of the base 31 toward the outside of the base 31, and an arm portion 32A. And a contact portion 33 provided on the side of the arm portion 32 B opposite to the connection side with the base portion 31.
The contact portion 33 is formed with a bent portion 33A and a bent portion 33B that are curved toward the outside where the pair of arm portions 32A and the arm portions 32B are separated from each other. A joint portion (first joint portion) 34A and a joint portion (second joint portion) 34B are provided at a tip portion further extending from the bent portion 33A.

An end portion (first end portion) 35A and an end portion (second end portion) 35B of a bail strap 35 (band member) for winding the outer peripheral surface of the accumulator 2 in the circumferential direction are connected to the joint portion 34A and the joint portion 34B. Is done. One end portion 35 A of the bail strap 35 forms a key-shaped locking portion. The end portion 35A is formed such that the other end portion 35B can pass the bolt 36 and the second joint portion 34B can be overlapped with each other.

In the bent portion 33A and the bent portion 33B, the bent portion 33A on the one first joint portion 34A side is bent more (the radius of curvature is smaller) than the bent portion 33B on the other second joint portion 34B side. The first end portion 35A of the bail strap 35 is locked to the first joint portion 34A and is fixed by a bolt 36. Similarly, the second end portion 35B is overlapped and locked to the second joint portion 34B, and is fixed by a bolt 36.

Each tip of the pair of bent portions 33 A and 33 B is in contact with the outer peripheral surface of the accumulator 2. That is, as shown in FIG. 3, the bracket 3 is attached to the accumulator 2 in a state where the arm portion 32 A and the arm portion 32 B are in line contact with the outer peripheral surface of the accumulator 2.

As shown in FIG. 4, inside the arm portion 32A and the arm portion 32B, there are a pair of vertical ribs 32a extending along the extending direction of the arm portion 32A and the arm portion 32B, and the arm portion 32A and the arm portion 32B, respectively. Square ribs 32b provided over the base 31 are provided. By providing these ribs 32a and ribs 32b, the rigidity of the bracket 3 can be improved, and in particular, it can be adapted to a low-frequency excitation force.

In this case, by operating the compressor body 10 to which the accumulator 2 is attached, the excitation force is propagated to the accumulator 2 via the bracket 3.

Next, operations of the compressor bracket and the rotary compressor having the above-described configuration will be specifically described with reference to the drawings.
As shown in FIGS. 2 and 3, in the present embodiment, the base 31 of the bracket 3 is fixed to the compressor body 10 and formed on the outer peripheral surface of the accumulator 2 at the contact portion 33 of the arm portion 32A and the arm portion 32B. The bent portions 33A and the bent portions 33B can be attached in contact with each other. Thereby, the bent portion 33 A and the bent portion 33 B are in line contact with the outer peripheral surface of the accumulator 2. As a result, the contact area can be reduced compared to the case of surface contact.
Therefore, the vibration transmission rate from the compressor body 10 to the accumulator 2 can be kept small. Therefore, the vibration of the accumulator 2 can be reduced, and the radiated sound generated from the accumulator 2 can be reduced.

In the present embodiment, the bail strap 35 wound around the outer peripheral surface of the accumulator 2 can be connected to the bent portion 33A and the bent portion 33B that are bent outward, so that the accumulator 2 can be more reliably connected. It can be attached.

In the compressor bracket and the rotary compressor according to the above-described embodiment, it is possible to effectively suppress the generation of vibration and noise from the accumulator 2 by reducing the contact area of the bracket 3.

Next, another embodiment of the compressor bracket and the rotary compressor according to the present invention will be described with reference to the accompanying drawings. However, the same or similar members and parts as those of the first embodiment described above are denoted by the same reference numerals and description thereof will be omitted, and a configuration different from that of the first embodiment will be described.

(Second Embodiment)
As shown in FIG. 5, the compressor 1 by 2nd Embodiment becomes a structure by which the elastic sheet 37 was arrange | positioned inside the bail strap 35 (strip | belt member) for connecting bracket 3A by sticking. Yes.
In the bracket 3A of the present embodiment, the arm portion 32A and the arm portion 32B are attached to the base portion 31 with an inclination in contact with the tangential direction of the accumulator 2 (two-dot chain line E shown in FIG. 5).

In the second embodiment, the bracket 3A is fixed to the accumulator 2 by connecting the bail strap 35 wound around the outer peripheral surface of the accumulator 2 to the joint portion 34A and the joint portion 34B of the bracket 3A. In this state, the vibration of the accumulator 2 can be reduced by the shear deformation of the elastic sheet 37 inside the bail strap 35, and the radiated sound generated from the accumulator 2 can be reduced.
In addition, the effect of reducing a contact area is acquired by narrowing the width | variety of the bail strap 35. FIG.

Further, the bracket 3A can be attached in contact with the pair of arm portions 32A and arm portions 32B so as to sandwich the outer peripheral portion of the accumulator 2. The inclined portions of the arm portion 32 A and the arm portion 32 B extend in the tangential direction E of the accumulator 2. Therefore, the inclined portion is orthogonal to the radial direction r of the accumulator 2. Therefore, vibration in the radial direction of the accumulator 2 can be effectively suppressed. As a result, a vibration suppressing effect can be exhibited particularly in a concentrated winding motor having a large radial vibration.

The embodiments of the compressor bracket and the rotary compressor according to the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the scope of the present invention. .

For example, in the present embodiment, the base 31 of the bracket 3 is attached to the compressor body 10 side, and the contact portions 33 (bending

portions

33A and 33B) are attached to the outer peripheral portion side of the accumulator 2, but on the contrary It is also possible to attach. That is, the contact portion 33 can be attached in contact with the outer peripheral surface of either the compressor body 10 or the accumulator 2.

In the bracket 3, as shown in FIG. 6, it is also possible to provide the convex part 38 in the part (contact part 33) which contacts the accumulator 2 inside the arm part 32A and the arm part 32B. The convex portion 38 shown in FIG. 6 includes a protrusion 38A extending along the length direction of the arm portion 32A and the arm portion 32B, and a bulging portion 38B and a bulging portion 38C. Each convex portion 38 is provided so as to be in point contact with the outer peripheral portion of the accumulator 2.
In this case, the convex part 38 (38A, 38B, 38C) provided in a contact part can be made to contact the outer peripheral surface of the accumulator 2, and can be attached. Thereby, the convex part 38 becomes a point contact with respect to the said outer peripheral surface, and a contact area can be reduced compared with the case of a surface contact. Therefore, the vibration transmission rate from the compressor body 10 to the accumulator 2 can be kept small. As a result, the vibration of the accumulator 2 can be reduced, and the radiated sound generated from the accumulator 2 can be reduced.

As shown in FIG. 7, the bracket 3 may be provided with a notch 39 in the contact portion 33. In this case, the portion 33 a remaining by the notch 39 can be attached in contact with the outer peripheral surface of the accumulator 2. Thereby, the contact area with respect to the said outer peripheral surface can be reduced compared with the case of surface contact. Therefore, the vibration transmissibility from the compressor body 10 to the accumulator 2 can be kept small, the vibration of the accumulator 2 can be reduced, and the radiated sound generated from the accumulator 2 can be reduced.

The lengths of the base 31 and the

arms

32A and 32B of the bracket 3, the curvature of the

bent portions

33A and 33B, the thickness of the bracket 3, the material, and the like are the same as those of the compressor body 10 and the accumulator 2. It can be appropriately changed in accordance with conditions such as shape and magnitude of vibration.

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described embodiments may be appropriately combined.

According to the compressor bracket and the rotary compressor, it is possible to effectively suppress the generation of vibration and noise from the accumulator by reducing the contact area of the compressor bracket.

1 Compressor (Rotary compressor)
2

Accumulator

3, 3A Bracket (Compressor bracket)
DESCRIPTION OF SYMBOLS 10 Compressor main body 11

Housing

20A, 20B Cylinder 31

Base part

32A,

32B Arm part

32a, 32b Rib 33

Contact part

33A,

33B Bending part

34A, 34B Joint part 35 Bail strap (band member)
37

Elastic sheet

38, 38A, 38B, 38C Convex part 39 Notch E Tangential direction

Claims

The base,
A pair of arm portions provided to be inclined from both ends of the base portion toward the outside of the base portion;
A contact portion provided on the opposite side of the arm portion from the connection side with the base portion;
With
The contact portion is a compressor bracket in which a bent portion is formed.
The bracket for a compressor according to claim 1, wherein the bent portion is curved toward an outside where the pair of arm portions are separated from each other.
The compressor bracket according to claim 1 or 2, wherein the contact portion is provided with a convex portion.
The compressor bracket according to claim 1 or 2, wherein the contact portion is provided with a notch.
The bracket for a compressor according to any one of claims 1 to 4, wherein the arm portion is provided with a rib.
A rotary compressor using the compressor bracket according to any one of claims 1 to 5,
A compressor body and an accumulator;
The compressor body and the accumulator are connected to the bracket for the compressor, a band member connected to a bent portion of the compressor bracket and wound around an outer peripheral surface of the accumulator, and inside the band member A rotary compressor connected by an elastic sheet arranged.
The rotary compressor according to claim 6, wherein the arm portion is attached to the base portion with an inclination in contact with a tangential direction of the accumulator.