JP2002161854A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor capable of reducing sound vibration and preventing sound vibration reduction effect from being reduced by lubricating oil. SOLUTION: In the compressor 1 provided with a compression part compressing gas, a discharge chamber 20 discharging the gas compressed by the compression part, and at least two discharge pipes 22 leading gas into the discharge chamber 20 from the compression part, a plurality of discharge pipes 22 are provided in such a way that directions in which gas is blown out cross on extension line, and the discharge pipe 22 has a main passage 25 leading the gas into the discharge chamber 20 and a branched passage 26 branched from the main passage 25, communicated with the inside of the discharge chamber 20, and having a smaller inside diameter than that of the main passage 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used in an air conditioner or the like and constituting a part of a refrigeration cycle.

[0002]

2. Description of the Related Art In a conventional compressor, means for reducing noise include, for example, those shown in FIGS. 4 (a) and 4 (b). This shows the structure of the front side block 9 that closes one end of the compression mechanism. The front side block 9 has a concave portion 23 formed in a portion where high-pressure gas is discharged from the compression mechanism, Recess 2
A discharge pipe 30 communicating the discharge chamber 3 with a discharge chamber in which high-pressure gas is stored is provided. In this example, the inner diameter d of the discharge pipe 30 for guiding the high-pressure gas into the discharge chamber is reduced to a predetermined value or less, thereby suppressing gas pulsation and reducing sound vibration.

The compressor disclosed in Japanese Patent Application Laid-Open No. 9-79156 has two discharge pipes having the same length (volume) for guiding a compressed refrigerant. It is connected to the common pipe of the book. The phases of the pulsations of the gas flowing in these two discharge pipes are shifted from each other by a half wavelength. According to this configuration, since the pulsations of the gas flowing in the two discharge pipes cancel each other out in the common pipe, the sound vibration can be reduced.

[0004]

The lubrication of the compressor is usually performed by lubricating oil dissolved in the refrigerant circulating in the refrigeration cycle, and the lubricating oil enters the compressor together with the refrigerant from the suction side and enters the compressor. After flowing to each sliding portion and operating portion inside to perform a lubricating action, it is discharged into the cycle from the discharge side together with the high-pressure refrigerant. And, Japanese Patent Application Laid-Open No. 9-7915
According to the configuration of No. 6, when the high-pressure refrigerant collides in the common pipe, the lubricating oil dissolved in the gas is separated. However, in the configuration of JP-A-9-79156,
Since the lubricating oil separated from the refrigerant easily accumulates in the discharge pipe, the volumes of the two discharge pipes become unbalanced, the effect of canceling the gas pulsation is weakened, and the effect of reducing the sound vibration is reduced. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a compressor in which sound vibration is reduced, and the effect of reducing the sound vibration is not easily reduced by lubricating oil.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a compression section for compressing a gas, a discharge chamber for discharging the gas compressed by the compression section, In a compressor including at least two discharge pipes for guiding gas to a discharge chamber, the plurality of discharge pipes are provided such that a direction in which gas blows out intersects on an extension of the discharge pipe, and the discharge pipe includes the gas And a branch passage branched from the main passage and communicating with the discharge chamber and having an inner diameter smaller than that of the main passage (claim 1).

[0007] According to this, the high-pressure refrigerant discharged through the main passage in the discharge pipe collides at points intersecting each other on an extension of the blowing direction. Accordingly, the pulsation of the high-pressure refrigerant discharged from each discharge pipe cancels each other, so that sound vibration can be reduced. Further, the lubricating oil separated from the high-pressure refrigerant when passing through the discharge pipe is immediately discharged from the discharge pipe into the discharge chamber by a branch passage formed at a position below the discharge pipe. Accumulation can be prevented. Thus, the volumes in the discharge pipes (main passages) can be prevented from being unbalanced, so that the effect of canceling the pulsation of the gas can be favorably maintained. Also, if excessive oil accumulates in the discharge chamber due to usage conditions, the gas space in the discharge chamber will decrease and the pulsation reduction effect will decrease, but by providing a branch passage, excess oil is discharged outside the discharge chamber. Thus, a gas space can be secured.

It is preferable that a separation plate is provided in the discharge chamber to separate the space in which the gas accumulates from the space in which the oil accumulates.

According to this, the portion where oil (lubricating oil) accumulates can be separated from the portion where gas is blown out and accumulates by the separating plate without being affected by changes in use conditions. As a result, the branch passage can be prevented from being blocked by oil.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

A compressor 1 according to an embodiment of the present invention shown in FIG. 1 constitutes a part of a known refrigeration cycle used for a vehicle air conditioner, and is usually provided via a belt, a clutch or the like. Driven by the torque of the driving engine,
The evaporator has a function of compressing the low-temperature and low-pressure refrigerant gas to a high temperature and high pressure, and sending out the compressed refrigerant gas to a condensing (radiator).

The compressor 1 is a so-called vane type compressor, and includes a front block 3 and a rear block 4.
, A cylinder block 2 is arranged. The cylinder block 2 has a substantially elliptical space formed on the inner surface thereof, and a rotor 5 having a substantially circular cross section is disposed in this space. The rotor 5 is fixed to a drive shaft 8 rotatably held via a bearing 12 on a front side block 9 and a rear block 4 for closing the front side of the cylinder block 2. It is connected to a transmission mechanism, such as a belt or a clutch, which penetrates through the front block 2 and extends to the outside to transmit the rotational force of the traveling engine.

The rotor 5 has, for example, five vane grooves formed radially in a substantially radial direction, and a vane 6 is slidably inserted into each vane groove. Thus, a compression chamber is defined in the cylinder block 2 by the inner peripheral surface of the cylinder block 2, the rotor 5, the front side block 9, the rear block 4, and the adjacent vane 6, and the rotor 5 rotates, The vane 6 rotates while sliding along the inner peripheral surface of the cylinder block 4, and the volume of the compression chamber changes.

The rear block 4 has a suction chamber 13 formed between the rear block 4 and the cylinder block 2.
The check valve 14 communicates with a suction port 15 which communicates with an external engine, for example, an evaporator of a refrigeration cycle, and also communicates with a compression chamber in the cylinder block 2.

The front block 3 is shown in FIG.
As shown in (b), the cylinder block has an open space 17, a hole 18 through which the drive shaft 8 is inserted is formed at the center, and a joint end face 19 on the outer cylinder block side. . The space 17 of this front block 3
A discharge chamber 20 is formed by the cylinder block 2 and the front side block 9 to discharge the high-pressure refrigerant in the compression chamber. The discharge chamber 20 has an external engine, such as a condenser of a refrigeration cycle. And a pipe (not shown) that communicates with the pipe.

The front side block 9 is shown in FIG.
As shown in FIGS. 2A, 3A and 3B, one end surface is in contact with the cylinder block 2 and the other end surface is in contact with the front block 3.
The discharge chamber 20 is located inside the discharge chamber 20. A hole 21 through which the drive shaft 8 is inserted is formed in the center of the front side block 9, and a compression chamber of the cylinder block 2 and the discharge chamber 20 are provided on the discharge chamber side.
Is formed.

As shown in FIGS. 2 (a) and 2 (b) and FIGS. 3 (a) and 3 (b), a refrigerant discharged from the compression chamber through a discharge valve is introduced into the discharge pipe 22. A main passage 25 communicating the recess 23 formed in the front side block 9 defining the discharge valve insertion space with the discharge chamber 20; a small-diameter branch passage 26 branched from the main passage 25 and communicating with the discharge chamber 20; And

Further, since the discharge pipe 22 is provided with two discharge valves, as shown in FIG.
The main passages 25 are formed diagonally so as to face each other with the hole 21 interposed therebetween. The inner diameter d1 of the main passage 25 of the discharge pipe 22 is about 5.5 mm, whereas the inner diameter d2 of the branch passage 26 is preferably about 2.0 mm.

As shown in FIGS. 2 and 3, the front block 3 is provided with a separation plate 2 for vertically dividing the discharge chamber 20.
Eight. That is, the position of the separation plate 28 is
As shown in (a) and (b), a gas reservoir space 20a is formed above the separation plate 28, and a lubricating oil reservoir space 20b is formed below the separation plate 28. . Due to the separation plate 28, a structure is obtained in which the lubricating oil does not easily enter the gas accumulation space 20a even when there is a vibration or a change in the use condition. Therefore, it is possible to prevent the branch passage 26 from being blocked by the lubricating oil.

In the above configuration, when the rotor 5 rotates and enters the suction stroke in which the compression chamber expands, the compression chamber communicates with the suction chamber 13 and refrigerant gas is sucked into the compression chamber. Then, when the rotor 5 further rotates and enters a compression stroke in which the volume of the compression chamber is reduced, the refrigerant compressed to a predetermined pressure is discharged to the discharge chamber 20 through the discharge pipe 22.

According to the compressor 1 having the above-described structure, the high-pressure refrigerant discharged from the discharge ports 29 of the two discharge pipes 22 collides with each other at an air portion that intersects on an extension of the discharge direction of the refrigerant, and pulsates with each other. Cancel each other, so that sound vibration can be reduced. Even if the lubricating oil dissolved in the refrigerant accumulates in the main passage 25, the branch passage 26 discharges the lubricating oil into the discharge chamber 20, thereby preventing the volumes in the two main passages 25 from becoming unbalanced. As a result, the effect of canceling the pulsation can be favorably maintained. Furthermore, this branch passage 2
By virtue of 6, extra lubricating oil can be discharged outside the cycle, so that a gas space necessary for pulsation reduction can be secured.

The separation plate 28 allows the interior of the discharge chamber 20 to have a gas reservoir space 20a and a lubricating oil reservoir space 20a.
b, it is difficult for the lubricating oil to enter the gas accumulation space 20a even if there is a vibration or a change in the use condition, so that the branch passage 26 can be prevented from being blocked by the lubricating oil. .

[0023]

As described above, according to the present invention, at least two discharge pipes for guiding the high-pressure refrigerant to the discharge chamber are provided such that the directions in which the refrigerant is blown out intersect on an extension of the discharge pipe. Since the pulsations of the blown-out high-pressure refrigerant cancel each other, sound vibration can be reduced. Further, since the lubricating oil separated from the refrigerant can be prevented from accumulating in the discharge pipe by the branch passage branching from the main path of the discharge pipe, the volume inside each discharge pipe can be prevented from becoming unbalanced, and The effect of canceling the pulsation can be favorably maintained. Furthermore, by forming a separation plate in the discharge chamber to separate the space in which the lubricating oil accumulates from the space in which the gas is blown out and accumulates, the gas space necessary for pulsation reduction can be secured. Regardless, the sound vibration reduction effect can be favorably maintained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a compressor according to an embodiment of the present invention.

FIG. 2A is a cross-sectional view of a front side block and a front block portion of a compressor according to this embodiment, and FIG. 2B is a sectional view taken along line AA ′ of FIG. 2A. FIG. 3 is a diagram of a front block viewed from a direction of FIG.

FIG. 3A is a front view of a front side block when the inside of a compressor according to the embodiment is viewed from a discharge chamber side, and FIG. 3B is a discharge diagram in the embodiment. It is sectional drawing near a pipe.

FIG. 4A is a front view of a front side block of a conventional compressor as viewed from a discharge chamber side.
(B) is a sectional view near a discharge pipe in a conventional compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Cylinder block 3 Front block 4 Rear block 5 Rotor 6 Vane 8 Drive shaft 9 Front side block 12 Bearing 13 Suction chamber 14 Check valve 15 Suction port 17 Space 18 Hole 19 Joining end face 20 Discharge chamber 20a Gas storage space 20b Lubricating oil storage space 21 Hole 22 Discharge pipe 23 Recess 25 Main passage 26 Branch passage 28 Separator plate 29 Discharge port

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadashi Takayama 39, Higashihara, Chiyo, Odai-gun, Osato-gun, Saitama Pref. 39 Higashihara F-term (reference) in Xexel Valeo Climate Control Co., Ltd.

Claims (2)

[Claims] A compressor that compresses a gas, a discharge chamber from which the gas compressed by the compression unit is discharged, and at least two discharge pipes that guide the gas from the compression unit to the discharge chamber. In the plurality of discharge pipes, a direction in which gas is blown out is provided so as to intersect on an extension thereof, and the discharge pipe is configured such that a main passage for guiding the gas to the discharge chamber and a main passage from the main passage. A compressor having a branch passage that branches and communicates with the discharge chamber and has a smaller inner diameter than the main passage. 2. The compressor according to claim 1, wherein a separation plate is provided in the discharge chamber to partition a space in which the gas is stored and a space in which oil is stored.