AU2020101791A4 - Accumulator and compressor for air conditioning - Google Patents

Abstract

This compressor for air conditioning is provided with an accumulator which is provided adjacent to a container body, and which supplies a refrigerant gas that has been subjected to gas-liquid separation, from a container body to the compressor body by means of a first pipe and a second pipe. The accumulator is provided with a support member 60, an outer edge 61a of which is attached to an inner wall of the container body, the support member 60 having a first support hole 631 that supports the first pipe and a second support hole 632 that supports the second pipe inside the container body. The center 631a of the first support hole 631 and the center 632a of the second support hole 632 are positioned away from a center line Al that passes through the center 60a of the support member 60 along the direction D of the most dominant exciting force transmitted from the compressor body 4.

Description

DESCRIPTION

Title of Invention

ACCUMULATOR, AND COMPRESSOR FOR AIR CONDITIONING

[0001]

The present application is a divisional application from

International Patent Application No. PCT/JP2018/044426 filed

on 13 February 2018, the contents of which are to be taken as

incorporated herein by this reference.

Technical Field

[0002]

The present invention relates to an accumulator and a

compressor for air conditioning.

Background Art

[0003]

A reference herein to a patent document or any other matter

identified as prior art, is not to be taken as an admission that

the document or other matter was known or that the information it

contains was part of the common general knowledge as at the

priority date of any of the claims.

[0004]

In the related art, there is a known technique related

to an accumulator for separating a refrigerant gas from lubricant, a foreign substance, or the like through gas liquid separation and supplying the refrigerant gas to a compressor body in a compressor for air conditioning. For example, PTL 1 discloses a structure in which a pipe for supplying a refrigerant gas from an accumulator to a compressor body is supported by a support member (connecting member) provided in the accumulator.

Citation List

Patent Literature

[00051

[PTL 1] Japanese Unexamined Patent Application

Publication No. 2011-169183

Summary of Invention

[00061

In a case where the accumulator as described in PTL 1 is

provided adjacent to the compressor body, an exciting force

caused by magnetism of a motor driving the compressor body or

an exciting force caused by pulsation of the compressor body

acts thereon. Particularly, the exciting force caused by

pulsation of the compressor body may cause vibration of a

pipe in the accumulator and the vibration may be transmitted

to the accumulator via the support member, which may cause

noise.

[00071

It is desirable to suppress vibration generated in an

accumulator provided adjacent to a compressor body of a

compressor for air conditioning and to reduce noise generated

in the compressor for air conditioning.

[0008]

According to the present invention, there is provided an

accumulator which is provided adjacent to a compressor body

of a compressor for air conditioning and which supplies a

refrigerant gas subjected to gas-liquid separation from a

container body to the compressor body via a pipe, the

accumulator comprising:

a support member of which an outer edge is attached to

an inner wall of the container body, the support member

including a support hole that supports the pipe inside the

container body,

wherein the support member includes a plurality of

through-holes provided at positions different from the

support hole,

wherein a rib portion extending from the outer edge

extends between the through-holes of the support member that

are adjacent to each other, and

wherein a center of the support hole is positioned away

from:

a center line that passes through a center of the

support member along a direction of a most dominant exciting force transmitted from the compressor body, and a center line along an extending direction in which the rib portion extends toward the center of the support member from the outer edge.

[00091

According to the configuration, a portion of the most

dominant exciting force transmitted from the pipe to the

support member is dispersed in a direction in which the

support member is twisted. As a result, an exciting force

that is transmitted to the container body of the accumulator

from the pipe via the support member can be reduced.

Therefore, according to the accumulator in the present

invention, vibration generated at the accumulator provided

adjacent to the compressor body of the compressor for air

conditioning can be suppressed and noise generated at the

compressor for air conditioning can be reduced.

[0010]

According to the configuration, regardless of the

direction of the exciting force transmitted from the

compressor body, a portion of an exciting force transmitted

from the pipe to the rib portion is dispersed in a direction

in which the rib portion is twisted. As a result, an exciting

force that is transmitted from the pipe to the container body

of the accumulator via the rib portion of the support member

can be reduced and vibration generated at the accumulator can

be suppressed.

[0011]

In addition, it is preferable that a plurality of the

pipes are disposed in the container body to correspond to the

number of compression chambers of the compressor body, a

plurality of the support holes are provided to correspond to

the disposed plurality of pipes, and all of centers of the

support holes are positioned away from the center line.

[0012]

According to the configuration, even in a case where

there are a plurality of the pipes, an exciting force that is

transmitted from each of the pipes to the container body of

the accumulator via the support member can be reduced and

vibration generated at the accumulator can be suppressed.

[0013]

According to the present invention, there is provided a

compressor for air conditioning including the accumulator

described above and the compressor body to which the

refrigerant gas is supplied from the accumulator via the pipe.

[0014]

According to the configuration, it is possible to

suppress vibration generated in the accumulator provided

adjacent to the compressor body of the compressor for air

conditioning and to reduce noise generated in the compressor

for air conditioning.

[0015]

Where any or all of the terms "comprise", "comprises",

"comprised" or "comprising" are used in this specification

(including the claims) they are to be interpreted as specifying

the presence of the stated features, integers, steps or

components, but not precluding the presence of one or more other

features, integers, steps or components.

Brief Description of Drawings

[0016]

Fig. 1 is a schematic view showing an accumulator and a

compressor for air conditioning according to an embodiment.

Fig. 2 is a cross-sectional view showing a support

member.

Fig. 3 is a cross-sectional view showing a modification

example of the support member.

Description of Embodiments

[0017]

Hereinafter, an embodiment of an accumulator and a

compressor for air conditioning according to the present

invention will be described in detail based on the drawings.

Note that, the present invention is not limited by the

embodiment.

[0018]

The compressor for air conditioning 1 according to the

embodiment is applied to, for example, an air conditioner for

a room. Although not explicitly shown in the drawings, the air conditioner is configured to include an outdoor unit disposed outdoors and an indoor unit disposed indoors. The air conditioner circulates a refrigerant between the outdoor unit and the indoor unit and performs heat exchange outdoors and indoors to perform cooling, heating, or cooling and heating indoors. In the air conditioner, the compressor for air conditioning 1 is disposed in the outdoor unit, sucks and compresses a refrigerant, and supplies the refrigerant to the outdoor unit or an external element of the indoor unit. Note that, the compressor for air conditioning 1 is not limited to an air conditioner for a room and may be applied to an air conditioner having any use.

[0019]

As shown in Fig. 1, the compressor for air conditioning

1 is configured to include a housing 2, a drive unit 3, a

compressor body 4, and an accumulator 5.

[0020]

The housing 2 has a substantially cylindrical shape of

which a top and a bottom are sealed and the drive unit 3 and

the compressor body 4 are accommodated therein. The housing 2

is disposed with a cylinder thereof standing upright and a

discharge pipe 21 is provided at a top thereof. In addition,

a bottom portion of the housing 2 is configured as an oil

reservoir 22 and lubricant L to be supplied to the compressor

body 4 is stored in the oil reservoir 22.

[0021]

The drive unit 3 is a slot motor and includes a stator

31, a rotor 32, and a shaft 33. The drive unit 3 is fixed to

an inner wall surface of the housing 2 at the stator 31. The

rotor 32 is provided to be rotatable with respect to the

stator 31 and the shaft 33 is provided to face a vertically

lower side. A lower end portion of the shaft 33 is connected

to the compressor body 4. Power is supplied to the drive unit

3 from the outside of the housing 2 via a wire (not shown).

[0022]

The compressor body 4 is disposed below the drive unit 3

inside the housing 2. In the present embodiment, the

compressor body 4 is a two-cylinder twin rotary type

compression mechanism. In the compressor body 4, a first

compression section 41 and a second compression section 42

are configured in multiple stages arranged vertically. The

first compression section 41 and the second compression

section 42 are arranged along the axis of rotation of the

shaft 33. The first compression section 41 includes a rotor

411 and a compression chamber 412. The second compression

section 42 includes a rotor 421 and a compression chamber 422.

A partition plate 43 is provided between the first

compression section 41 and the second compression section 42.

The partition plate 43 constitutes a portion of the walls of

the compression chambers 412 and 422. An insertion hole 431

into which the shaft 33 is inserted is formed in the

partition plate 43. Bearings 44 are provided above and below the first compression section 41 and the second compression section 42. The bearings 44 rotatably support the shaft 33.

Regarding the shaft 33, a crank 331 is provided at a position

corresponding to the first compression section 41 and a crank

332 is provided at a position corresponding to the second

compression section 42. The crank 331 is provided with the

rotor 411 and the crank 332 is provided with the rotor 421.

[0023]

In addition, inside the lower end portion of the shaft

33, an oil supply passage 333 is provided. A lower end of the

shaft 33 is provided to reach the oil reservoir 22 of the

housing 2 and from the lower end, the lubricant L is supplied

to the compressor body 4 via the oil supply passage 333. Note

that, the oil supply passage 333 includes an oil supply

passage 333a penetrating the crank 331 corresponding to the

first compression section 41 and an oil supply passage 333b

penetrating the crank 332 corresponding to the second

compression section 42.

[0024]

The accumulator 5 is a separator performing gas-liquid

separation of a refrigerant gas as a working fluid. The

accumulator 5 is disposed outside the housing 2 while being

disposed adjacent to the compressor body 4 (adjacent to

housing 2). The accumulator 5 includes a container body 50, a

plurality of pipes 51, and a support member 60.

[0025]

The container body 50 has a substantially cylindrical

shape of which a top and a bottom are sealed. The container

body 50 is connected to the housing 2 via a connecting member

(not shown). A top of the container body 50 is provided with

an inflow pipe 501. The pipes 51 include a first pipe 511 and

a second pipe 512. The first pipe 511 and the second pipe 512

extend toward the top portion from a bottom portion of the

container body 50, inside the container body 50. One end of

the first pipe 511 is connected to the compression chamber

412 of the first compression section 41 and the other end

thereof is open inside the container body 50. In addition,

the first pipe 511 is supported by the support member 60

which will be described later. The second pipe 512 is a pipe

for supplying a fluid to the second compression section 42 of

the compressor body 4. One end of the second pipe 512 is

connected to the compression chamber 422 of the second

compression section 42 and the other end thereof is open

inside the container body 50. In addition, the second pipe

512 is supported by the support member 60 which will be

described later.

[0026]

In the case of the compressor for air conditioning 1

configured as described above, a refrigerant gas that has

passed through an external element (for example, evaporator

(not shown)) is supplied into the container body 50 of the

accumulator 5 via the inflow pipe 501. Furthermore, the refrigerant gas is supplied to the first compression section

41 of the compressor body 4 via the first pipe 511 and is

supplied to the second compression section 42 of the

compressor body 4 via the second pipe 512. In the compressor

body 4, when power is supplied to the drive unit 3 and the

shaft 33 is rotated, the rotors 411 and 421 eccentrically

rotate inside the compression chambers 412 and 422 due to the

cranks 331 and 332 and the refrigerant gas in the compression

chambers 412 and 422 is compressed. The refrigerant gas

compressed in the compression chambers 412 and 422 is

discharged to the outside of the housing 2 from the discharge

pipe 21 and is supplied to the external element.

[00271

In addition, as described above, into each of the

compression chambers 412 and 422, the lubricant L is supplied.

A portion of the lubricant L supplied to the compression

chambers 412 and 422 is supplied to the external element in a

state of being contained in the compressed refrigerant gas.

In the accumulator 5, the lubricant L or dust is separated

from the refrigerant gas that has passed through the external

element through gas-liquid separation by means of a net

shaped filter 53 provided at an upper portion of the

container body 50. Regarding the accumulator 5, the

refrigerant gas subjected to the gas-liquid separation is

supplied to the compression chambers 412 and 422 and the

lubricant L subjected to the gas-liquid separation is accumulated on the bottom portion of the container body 50.

Note that, the accumulator 5 is configured such that an oil

return hole 511a is formed in the first pipe 511, an oil

return hole 512a is formed in the second pipe 512, and the

lubricant L accumulated on the bottom portion of the

container body 50 is returned to the compression chambers 412

and 422.

[0028]

Next, the support member 60 included in the accumulator

according to the present embodiment will be described in

detail with reference to Figs. 1 and 2. Fig. 2 is a cross

sectional view showing the support member. As shown in Fig. 1,

the support member 60 includes a bottom portion 61, a wall

portion 62, support holes 63, and through-holes 64 (see Fig.

2). The bottom portion 61 is formed in a circular shape as

shown in Fig. 2. The wall portion 62 extends vertically

upward from an outer edge 61a of the bottom portion 61. That

is, the support member 60 is formed in a bowl-like shape by

the bottom portion 61 and the wall portion 62. The wall

portion 62 and the outer edge 61a of the support member 60

are fixed to an inner wall of the container body 50 through,

for example, welding. Note that, although the position of the

support member 60 in a height direction in the container body

may be any position as long as the first pipe 511 and the

second pipe 512 can be appropriately supported, in a case

where the container body 50 is divided into a plurality of parts at any position in the vertical direction, it is preferable that the support member 60 is provided at a joint therebetween.

[0029]

The support holes 63 are through-holes formed in the

bottom portion 61 as shown in Figs. 1 and 2. The support

holes 63 include a first support hole 631 and a second

support hole 632. The first support hole 631 and the second

support hole 632 are formed in the bottom portion 61 at an

interval. The first support hole 631 is formed such that the

inner diameter thereof becomes slightly larger than the outer

diameter of the first pipe 511. As shown in Fig. 1, the first

pipe 511 is inserted into the first support hole 631 such

that the first pipe 511 is supported in the container body 50.

The second support hole 632 is formed such that the inner

diameter thereof becomes slightly larger than the outer

diameter of the second pipe 512. As shown in Fig. 1, the

second pipe 512 is inserted into the second support hole 632

such that the second pipe 512 is supported in the container

body 50. As described above, the first pipe 511 and the

second pipe 512 are supported by the support member 60 and

thus the first pipe 511 and the second pipe 512 are

restrained from vibrating inside the container body 50 and

coming into contact with each other while generating noise.

[0030]

As shown in Fig. 2, a plurality of through-holes 64 are formed at different positions from the first support hole 631 and the second support hole 632 of the bottom portion 61. The plurality of through-holes 64 are hole portions provided such that the refrigerant gas, the lubricant L, or the like in the container body 50 flow therethrough and prevent the volume of the accumulator 5 from being reduced because of the support member 60. In the present embodiment, the plurality of through-holes 64 are disposed at positions symmetrical with respect to a center (center of bottom portion 61) 60a of the support member 60.

[0031]

Here, in a case where the accumulator 5 is provided

adjacent to the compressor body 4 (adjacent to housing 2) as

with the compressor for air conditioning 1 according to the

present embodiment, an exciting force caused by magnetism of

the drive unit 3 driving the compressor body 4 or an exciting

force caused by pulsation of the compressor body 4 acts on

the accumulator 5 via the connecting member (not shown) that

connects the first pipe 511, the second pipe 512, the housing

2, and the container body 50 to each other. Particularly, the

exciting force caused by pulsation of the compressor body 4

may cause vibration of a pipe in the accumulator 5 and the

vibration may be transmitted to the accumulator 5 via the

support member 60, which may cause noise.

[0032]

Therefore, in the present embodiment, a center 631a of the first support hole 631 and a center 632a of the second support hole 632 formed in the support member 60 are positioned away from a center line Al passing through the center 60a of the support member 60 as shown in Fig. 2. The center line Al is a straight line passing through the center a along a direction D of the most dominant exciting force from among exciting forces that are transmitted to the first pipe 511 and the second pipe 512 due to pulsation caused by the operation of the compressor body 4, the direction D being shown by a solid arrow in Fig. 2. "Being positioned away from the center line Al" means that the center 631a of the first support hole 631 and the center 632a of the second support hole 632 are disposed at positions (positions separated from center line Al) that do not coincide with the center line Al.

Accordingly, when the most dominant exciting force caused by

pulsation of the compressor body 4 acts on the first pipe 511

and the second pipe 512 along the direction D, a portion of

the most dominant exciting force transmitted from the first

pipe 511 and the second pipe 512 to the support member 60 is

dispersed in a direction in which the support member 60 is

twisted with respect to the center 60a. As a result, an

exciting force that is transmitted to the container body 50

of the accumulator 5 from the first pipe 511 and the second

pipe 512 via the outer edge 61a of the support member 60 is

reduced and vibration of the container body 50 is suppressed.

Therefore, generation of noise in the compressor for air conditioning 1 is suppressed.

[00331

As described above, according to the accumulator 5 and

the compressor for air conditioning 1 in the present

embodiment, it is possible to suppress vibration generated in

the accumulator 5 provided adjacent to the compressor body 4

of the compressor for air conditioning 1 and to reduce noise

generated in the compressor for air conditioning 1.

[00341

In addition, the plurality of pipes 51 (first pipe 511

and second pipe 512) are disposed in the container body 50 to

correspond to the number of compression chambers 412 and 422

of the compressor body 4, the plurality of support holes 63

(first support hole 631 and second support hole 632) are

provided to correspond to the pipes 51, and all of the

centers of the support holes 63 (center 631a of first support

hole 631 and center 632a of second support hole 632) are

positioned away from the center line Al.

[00351

According to the configuration, even in a case where

there are a plurality of the pipes 51, an exciting force that

is transmitted from each of the pipes 51 (first pipe 511 and

second pipe 512) to the container body 50 of the accumulator

via the support member 60 can be reduced and vibration

generated at the accumulator 5 can be suppressed.

[00361

Fig. 3 is a cross-sectional view showing a modification

example of the support member. A support member 600 shown in

Fig. 3 includes a plurality of through-holes 640 instead of

the plurality of through-holes 64 of the support member 60

shown in Fig. 2. Since other constituent elements of the

support member 600 are the same as those of the support

member 60, the constituent elements are denoted by the same

reference numerals and description thereof will be omitted.

[00371

The plurality of through-holes 640 include a pair of

large-diameter holes 641 and 642 and a pair of small-diameter

holes 643 and 644, in the present embodiment. The pair of

large-diameter holes 641 and 642 are disposed with the center

a interposed therebetween in the vertical direction in the

drawing. The pair of small-diameter holes 643 and 644 are

disposed with the center 60a interposed therebetween in the

lateral direction in the drawing. Note that, the shapes and

the positions of the through-holes 64 and 640 shown in Figs.

2 and 3 are merely examples and if the first support hole 631

and the second support hole 632 are formed at different

positions, various shapes and positions corresponding to a

performance required for the accumulator 5 can be adopted.

[00381

Accordingly, a rib portion 65 extends from the outer

edge 61a between the through-holes 640 of the support member

600 that are adjacent to each other. The rib portions 65 include rib portions 651, 652, 653, and 654 as shown in the drawing. The rib portion 651 is a portion that extends between the large-diameter hole 641 and the small-diameter hole 643. The rib portion 652 is a portion that extends between the large-diameter hole 641 and the small-diameter hole 644. The rib portion 653 is a portion that extends between the large-diameter hole 642 and the small-diameter hole 643. The rib portion 654 is a portion that extends between the large-diameter hole 642 and the small-diameter hole 644.

[00391

Here, two-dot chain lines in Fig. 3 show a center line

B1 along an extending direction of the rib portion 651, a

center line B2 along an extending direction of the rib

portion 652, a center line B3 along an extending direction of

the rib portion 653, and a center line B4 along an extending

direction of the rib portion 654, respectively. The

"extending directions" are directions in which the rib

portions 651, 652, 653, and 654 extend toward the center 60a

of the support member 600 from the outer edge 61a. In the

support member 600, the center 631a of the first support hole

631 and the center 632a of the second support hole 632 are

positioned away from the center lines B1, B2, B3, and B4 as

shown in the drawing. "Being positioned away from the center

lines B1, B2, B3, and B4" means that the center 631a of the

first support hole 631 and the center 632a of the second support hole 632 are disposed at positions (positions separated from center lines B1, B2, B3, and B4) that do not coincide with the center lines B1, B2, B3, and B4.

[0040]

According to the configuration, regardless of the

direction of an exciting force transmitted from the

compressor body 4, a portion of an exciting force transmitted

from the first pipe 511 and the second pipe 512 to the rib

portions 651, 652, 653, and 654 is dispersed in directions in

which the rib portions 651, 652, 653, and 654 are twisted. As

a result, an exciting force that is transmitted from the

first pipe 511 and the second pipe 512 to the container body

of the accumulator 5 via the rib portions 651, 652, 653,

and 654 of the support member 600 can be reduced and

vibration generated at the accumulator 5 can be suppressed.

[0041]

Note that, the shapes of the support members 60 and 600

are not limited to those in the present embodiment. For

example, the support members 60 and 600 may include no wall

portion 62 as long as the support members 60 and 600 can be

stably fixed to the container body 50. In addition, a

configuration in which the support members 60 and 600 are

provided with cylindrical portions that protrude in at least

any one of vertical directions from edge portions of the

first support hole 631 and the second support hole 632 and

the cylindrical portions widely support outer peripheries of the first pipe 511 and the second pipe 512 may also be adopted. In addition, in a case where the container body 50 does not have a substantially cylindrical shape, the bottom portions 61 of the support members 60 and 600 may be formed in a shape other than a circular shape to correspond to the shape of an inner surface of the container body 50.

[00421

In the present embodiment, a configuration of the

accumulator 5 according to the embodiment has been described

with the twin rotary type compressor for air conditioning 1

as a target. However, the accumulator 5 according to the

embodiment may be applied to any compressor for air

conditioning such as a single rotary type compressor for air

conditioning or a scroll type compressor for air conditioning.

[0043]

For example, in the case of a configuration in which the

compressor body 4 includes only one compression chamber and

there is only one pipe 51 connecting the accumulator 5 and

the compression chamber to each other, the support member 60

may include one support hole 63 for supporting the one pipe

51. In this case as well, the center of the support hole 63

may be positioned away from at least the center line Al shown

in Fig. 2 and more preferably positioned away from the center

lines B1, B2, B3, and B4 shown in Fig. 3.

[0044]

In addition, for example, in the case of a configuration in which the compressor body 4 includes three or more compression chambers and there is three or more pipes 51 connecting the accumulator 5 and the compression chambers to each other, the support member 60 may include three or more support holes 63 to correspond to the number of the plurality of pipes 51. In this case as well, the centers of the three or more support holes 63 may be positioned away from at least the center line Al shown in Fig. 2 and more preferably positioned away from the center lines B1, B2, B3, and B4 shown in Fig. 3.

Reference Signs List

[0045]

1 compressor for air conditioning

2 housing

21 discharge pipe

22 oil reservoir

3 drive unit

31 stator

32 rotor

33 shaft

331, 332 crank

333, 333a, 333B oil supply passage

4 compressor body

41 first compression section

411, 421 rotor

412, 422 compression chamber

42 second compression section

43 partition plate

44 bearing

431 insertion hole

accumulator

container body

501 inflow pipe

51 pipe

511a, 512a oil return hole

511 first pipe

512 second pipe

53 filter

, 600 support member

a, 631a, 632a center

61a outer edge

61 bottom portion

62 wall portion

63 support hole

64, 640 through-hole

rib portion

631 first support hole

632 second support hole

641, 642 large-diameter hole

643, 644 small-diameter hole

651, 652, 653, 654 rib portion

Al, B1, B2, B3, B4 center line

L lubricant

Claims (3)

1. The claims defining the invention are as follows:

   [Claim 1]

   An accumulator which is provided adjacent to a

   compressor body of a compressor for air conditioning and

   which supplies a refrigerant gas subjected to gas-liquid

   separation from a container body to the compressor body via a

   pipe, the accumulator comprising:

   a support member of which an outer edge is attached to

   an inner wall of the container body, the support member

   including a support hole that supports the pipe inside the

   container body,

   wherein the support member includes a plurality of

   through-holes provided at positions different from the

   support hole,

   wherein a rib portion extending from the outer edge

   extends between the through-holes of the support member that

   are adjacent to each other, and

   wherein a center of the support hole is positioned away

   from:

   a center line that passes through a center of the

   support member along a direction of a most dominant exciting

   force transmitted from the compressor body, and

   a center line along an extending direction in which

   the rib portion extends toward the center of the support

   member from the outer edge.
2. [Claim 2]

   The accumulator according to Claim 1,

   wherein a plurality of the pipes are disposed in the

   container body to correspond to the number of compression

   chambers of the compressor body,

   wherein a plurality of the support holes are provided to

   correspond to the disposed plurality of pipes, and

   wherein all of centers of the support holes are

   positioned away from the center line.
3. [Claim 3]

   An compressor for air conditioning comprising:

   the accumulator according to Claim 1 or 2; and

   the compressor body to which the refrigerant gas is

   supplied from the accumulator via the pipe.