JP2016079886A - Compressor bracket and rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable occurrence of vibration from an accumulator or noise to be effectively restricted by reducing a contact area of a compressor bracket.SOLUTION: This invention provides a compressor bracket constituted in such a way that a bracket 3 comprises a base part 31 fixed to an outer peripheral surface of a housing 11, a pair of arms 32A, 32B arranged to be inclined from both ends of the base part 31 toward outside of the base part 31 and a contact part 33 arranged at a side opposite to the connected side with the base part 31. The contact part 33 is formed with bent parts 33A, 33B curved toward outside where the pair of arms 32A, 32B are repelled from each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bracket for a compressor and a rotary compressor.

  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 having a structure in which two cylinders are separated by a separator.

  In such a rotary compressor 100, as shown in FIG. 8, there is a structure in which an accumulator 103 is attached to an 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 104 that are inclined from both ends of the base portion 106 toward the outside of the base portion 106, and each arm portion 104 has an accumulator 103. A locking surface 104a that coincides with the outer peripheral surface 103a is provided. 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. The accumulator 103 is fixed to the housing 101 by being locked to the tip of 104.

JP-A-9-250477

  However, the conventional rotary compressor has a problem that when the excitation force generated by the operation of the compressor is transmitted to the accumulator, the accumulator vibrates and emits noise. This excitation force is estimated to be a motor magnetic excitation force and a pulsation excitation force. Except for the suction pulsation, the excitation force is an excitation force generated from the compressor body, and 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 in an L shape, and it is difficult to change the structure of the suction pipe.
Further, in the conventional structure as shown in FIG. 8, the contact surface 104a of the arm portion 104 of the bracket 102 is in surface contact with the outer peripheral surface 103a of the accumulator 103. Since the vibration transmission rate of the compressor body becomes large, there is room for improvement in that respect.

  The present invention has been made in view of the above-described problems, and by reducing the contact area of the compressor bracket, the compressor bracket capable of effectively suppressing the generation of vibration and noise from the accumulator, and An object is to provide a rotary compressor.

  In order to achieve the above-described object, in the compressor bracket according to 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 arms And a contact portion provided on the side opposite to the connection side with the base portion, wherein the contact portion is formed with a bent portion.

  In the present invention, with the base portion fixed to either the compressor main body or the accumulator, the tip of the bent portion formed at the contact portion of the arm portion can be brought into contact with the other outer peripheral surface. 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 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 present invention, it is preferable that the bent portion bends 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.

  Moreover, in the bracket for compressors which concerns on this invention, it is preferable that the said contact part is provided with the convex part.

  In this case, the convex part provided in the contact part 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.

  Moreover, in the rotary compressor which concerns on this invention, it is preferable that the said contact part is provided with the notch.

  In this case, the portion remaining due to the notch 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, 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.

  Moreover, in the rotary compressor which concerns on this invention, it is preferable that the said arm part is provided with the rib.

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

  The rotary compressor according to the present invention is a rotary compressor using the compressor bracket described above, and includes a compressor main body and an accumulator, and the compressor main body and the accumulator are the compressor. Connected to the bent bracket of the compressor bracket and a belt member wound around the outer peripheral surface of the accumulator, and an elastic sheet disposed inside the belt member It is characterized by.

  In the present invention, the belt member wound around the outer peripheral surface of the accumulator is connected to the bent portion of the compressor bracket, whereby the compressor bracket is fixed to the accumulator. 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.

  Moreover, in the rotary compressor which concerns on this invention, it is preferable that the said arm part is attached to the said base part with the inclination which contacts the tangential direction of the said accumulator.

In this case, the pair of arms of the compressor bracket can be attached in contact with each other so as to sandwich the outer peripheral portion of the accumulator. 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, since the vibration in the radial direction of the accumulator can be effectively suppressed, the vibration suppressing effect can be exhibited particularly 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 main body 10 is a so-called two-cylinder type in which disk-shaped cylinders 20A and 20B are provided in two upper and lower stages in a cylindrical sealed housing 11 having a central axis in the vertical direction. 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.

Cylindrical piston rotors 21A and 21B having an outer diameter smaller than the inner diameter of the cylinder inner wall surface 20S are disposed inside the cylinders 20A and 20B. The piston rotors 21 </ b> A and 21 </ b> B are inserted and fixed to the eccentric shaft portions 23 </ b> A and 23 </ b> B of the shaft 22 along the center 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 rotors 21A and 21B.
Here, the upper-stage piston rotor 21 </ b> A and the lower-stage piston rotor 21 </ b> B are provided so that their phases are different from each other.
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) for dividing the compression chambers R1 and R2 into two, respectively. In each of the cylinders 20A and 20B, this blade is held in an insertion groove formed extending in the radial direction of the cylinders 20A and 20B so as to be able to advance and retract in a direction approaching and separating from the piston rotors 21A and 21B. ing. The rear end of the blade is pressed by a coil spring, and the front end is always pressed against the piston rotors 21A and 21B.

As shown in FIG. 1, the shaft 22 is supported by upper and lower bearings 26A and 26B fixed to upper and lower cylinders 20A and 20B by bolts so as to be rotatable around its axis.
The shaft 22 is formed with eccentric shaft portions 23A and 23B that are offset in a direction orthogonal to the central axis of the shaft 22 inside the piston rotors 21A and 21B. The eccentric shaft portions 23A and 23B have outer diameters slightly smaller than the inner diameters of the piston rotors 21A and 21B. Thus, when the shaft 22 rotates, the eccentric shaft portions 23A and 23B rotate around the central axis of the shaft 22, and the upper and lower piston rotors 21A and 21B roll eccentrically in the cylinders 20A and 20B. At this time, since the blade is pressed by the coil spring, the tip part advances and retreats following the movement of the piston rotors 21A and 21B, and is always pressed against the piston rotors 21A and 21B.

  The shaft 22 protrudes upward from the bearing 26 </ b> A, and a rotor 41 of the motor 40 for rotating the shaft 22 is provided at the protruding portion. 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.

  Openings 12A and 12B are formed on the side of the housing 11 at positions facing the outer peripheral surfaces of the cylinders 20A and 20B. The cylinders 20A and 20B are formed with suction ports 30A and 30B that communicate with the openings 12A and 12B up to a predetermined position on the cylinder inner wall surface 20S.

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 suction pipes 2A and 2B for allowing the refrigerant in the accumulator 2 to be sucked into the compressor body 10. The distal ends of the suction pipes 2A and 2B are connected to the suction ports 30A and 30B through the openings 12A and 12B.

In such a compressor 1, the refrigerant is taken into the accumulator 2 from the suction port 2a, the refrigerant is separated into gas and liquid in the accumulator 2, and the gas phase is drawn from the suction pipes 2A, 2B to the suction ports of the cylinders 20A, 20B. It supplies to compression chamber R1, R2 which is internal space of cylinder 20A, 20B via 30A, 30B.
Then, due to the eccentric rolling of the piston rotors 21A and 21B, the volumes of the compression chambers R1 and R2 are gradually reduced and the refrigerant is compressed. Discharge holes (not shown) for discharging refrigerant are formed at predetermined positions of the cylinders 20A and 20B, and reed valves (not shown) are provided in the discharge holes. 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 cylinders 20A and 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, and includes a base portion 31 fixed to the outer peripheral surface of the housing 11, and both ends of the base portion 31 to the outside of the base portion 31. A pair of arm portions 32A and 32B provided so as to be inclined toward each other, and a contact portion 33 provided on the side of the arm portions 32A and 32B opposite to the connection side with the base portion 31 are provided.
The contact portion 33 is formed with bent portions 33A and 33B that are curved toward the outside where the pair of arm portions 32A and 32B are separated from each other. Joint portions 34A and 34B are provided at the tip portion further extending from the bent portion 33A.

  End portions 35A and 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 portions 34A and 34B. One end portion 35A of the bail strap 35 forms a lock-like locking portion, and the other end portion 35B can be inserted through the bolt 36 and the second joint portion 34B can be overlapped with each other. Has been.

  In the bent portions 33A and 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 the second end portion 35B is similarly overlapped and locked to the second joint portion 34B, and is fixed by the bolt 36. Yes.

  The tips of the pair of bent portions 33 </ b> A and 33 </ b> B are 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 with the arm portions 32 </ b> A and 32 </ b> B in line contact with the outer peripheral surface of the accumulator 2.

  Further, as shown in FIG. 4, a pair of vertical ribs 32a extending along the extending direction of the arm portions 32A and 32B and the base portion 31 from the arm portions 32A and 32B are provided inside the arm portions 32A and 32B, respectively. Square ribs 32b to be provided. By providing these ribs 32a and 32b, the rigidity of the bracket 3 is improved, and in particular, it is possible to cope with 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 transmitted 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 contact portion 33 of the arms 32 </ b> A and 32 </ b> B on the outer peripheral surface of the accumulator 2. The bent portions 33A and 33B can be attached with their tips in contact with each other. Accordingly, the bent portions 33A and 33B are in line contact with the outer peripheral surface of the accumulator 2, and the contact area can be reduced as 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.

  In the present embodiment, the bail strap 35 wound around the outer peripheral surface of the accumulator 2 can be connected to the bent portions 33A and 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, the contact area of the bracket 3 is reduced, so that an effect of effectively suppressing vibration and noise from the accumulator 2 is achieved.

  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 are the same. Description will be omitted using the reference numeral, 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.
Further, in the bracket 3A of the present embodiment, the arm portions 32A and 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 portions 34A and 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.

  In addition, the pair of arm portions 32A and 32B of the bracket 3A can be attached in contact with each other so as to sandwich the outer peripheral portion of the accumulator 2. Since the inclined portions of the arm portions 32 </ b> A and 32 </ b> B extend in the tangential direction E of the accumulator 2, the inclined portions are orthogonal to the radial direction r of the accumulator 2. Therefore, since the vibration in the radial direction of the accumulator 2 can be effectively suppressed, the 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 portion 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; Is also possible. 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.

Moreover, 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 arm part 32A, 32B. The convex portion 38 shown in FIG. 6 includes a ridge 38A extending along the length direction of the arm portions 32A and 32B, and bulging portions 38B and 38C, and each convex portion 38 is formed on the outer peripheral portion of the accumulator 2. On the other hand, it is provided to be point contact.
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 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.

  Further, 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 length 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 determined by the shape of the compressor body 10 and the accumulator 2 and the magnitude of vibration. It can be appropriately changed according to the conditions.

  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.

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 (7)

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 compressor bracket, wherein the contact portion is formed with a bent portion.   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, wherein the contact portion is provided with a convex portion.   The bracket for a compressor according to claim 1, wherein the contact portion is provided with a notch.   The compressor bracket 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 characterized in that the rotary compressor is connected by an arranged elastic sheet.   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.

Images