JPH0643514Y2 - Vane compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) In addition, in this type of compressor, it is necessary to separate the oil from the refrigerant gas, but in the conventional compressor, a long pipe is placed inside the compressor body. It is known that the pulsation at the time of discharging the refrigerant gas and the oil separation are simultaneously performed by inserting the refrigerant gas (Japanese Utility Model Publication No. 60-30394).

The present invention relates to a vane compressor used as a refrigerant compressor of an air conditioning system for vehicles.

(Prior Art) Generally, in a vane type compressor in which a rotor rotates in a cylinder to change a volume between vanes, refrigerant gas is sucked, compressed, and discharged, and a piston reciprocates in the cylinder. The volume of the cylinder chamber changes and the pulsation at the time of sucking and discharging the refrigerant gas is smaller than that of a piston type compressor that sucks, compresses, and discharges the refrigerant gas, for example, a swash plate compressor, and is quiet. Is.

Recently, as the vehicle side becomes quieter, there is a strong demand for a vane type compressor that has a smaller pulsation and is quieter.

By the way, in the conventional compressor, as a technique for reducing the pulsation at the time of suction and discharge of the refrigerant gas, for example, in the low pressure side and high pressure side pipes respectively connected to the suction port and the discharge port of the compressor, respectively, It is known to attach a muffler (Japanese Utility Model Publication No. 52-16005).

(Problems to be solved by the invention) However, in the latter of the above-mentioned conventional techniques, since the low-pressure side and high-pressure side pipes to which the muffler is attached must be prepared, the manufacturing cost becomes high and the pulsation is increased. Since the muffler that reduces the noise is outside the compressor, it is less effective in reducing the noise caused by the vibration of the internal parts of the compressor due to pulsation, and the overall size is large and the weight is large. However, there is a problem that it is not suitable for installation in a narrow limited space.

Further, in the latter of the above-mentioned conventional techniques, a long pipe must be specially provided for oil separation, and accordingly,
There is a problem that the number of parts increases and the cost increases.

The present invention has been made in view of such conventional problems, and can efficiently reduce the vibration of the internal parts of the compressor caused by the pulsation at the time of discharging the refrigerant gas, and It is an object of the present invention to provide a vane type compressor that can efficiently separate oil contained in, has high quietness, is small and lightweight, and is low in cost.

(Means for Solving the Problem) In order to achieve such an object, a vane type compressor according to the present invention has a structure in which a vane type compressor is provided between a cylinder whose both end faces are closed by side blocks and a rotor which rotates in the cylinder. A pair of compression chambers, a discharge chamber defined by a side block on one side and a head on one side fixed to an end surface of the side block, and the refrigerant discharged from the compression chambers. In a vane type compressor in which gas is discharged into the discharge chamber through a discharge passage corresponding to each compression chamber of the one side block, the gas is compressed in each compression chamber and discharged from each discharge passage. A pair of muffler chambers into which the discharged refrigerant gas enters are provided in the side block on the one side or the head on the one side, and the wall portion forming these muffler chambers is provided with the muffler chambers from the both discharge chambers. A communication port that connects the muffler chamber and the discharge chamber is provided so that the refrigerant gas discharged to the chamber collides at an angle of 90 degrees or more.

(Operation) Refrigerant gas discharged from each compressor enters both muffler chambers through the discharge passages corresponding to each compression chamber of the side block on one side, so that the pulsation at the time of discharging the refrigerant gas is inside the compressor. Is reduced by. Further, since the refrigerant gas that has entered both muffler chambers enters the discharge chamber through the communication port and collides with the discharge chamber at an angle of 90 degrees or more, the oil contained in the refrigerant gas can be efficiently separated. Be seen.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

3 and 4 show a vane type compressor according to an embodiment of the present invention. The vane type compressor has a substantially elliptical inner peripheral surface.
A cylinder 1 having 1a, front and rear side blocks 2 and 3 fixed to both end surfaces of the cylinder 1 so as to close both end surfaces of the cylinder 1, and a discharge valve cover 5 fixed to the outer peripheral wall of the cylinder 1 with a bolt 4. And cylinder 1
A cylindrical rotor 6 rotatably housed therein, a vane 7 inserted into and retractable from a vane groove 6a of the rotor 6 in a radial direction, and fixed to outer end surfaces of both side blocks 2 and 3, respectively. It has front and rear heads 8 and 9, and a drive shaft 10.

A refrigerant gas discharge port 8a is formed on the upper surface of the front head 8, and a refrigerant gas suction port 9a is formed on the upper surface of the rear head 9. The discharge port 8a is in the second discharge chamber 11 for oil separation defined by the front head 8 and the front side block 2, and the suction port 9a is in the suction chamber 12 defined by the rear head 9 and the rear side block 3, respectively. It is in communication.

Two compression chambers 13 are defined at substantially symmetrical positions between the cylinder 1 and the rotor 6 whose both end surfaces are closed. Two discharge ports 14 opening to each compression chamber 13 are provided on the peripheral wall portion of the cylinder 1 at substantially symmetrical positions in the circumferential direction (FIG. 3 is a vertical section cut at an angle of about 90 degrees). Since it is a plan view, only the two discharge ports 14 on one side are shown in the figure). A discharge valve 15 held by the discharge valve cover 5 is arranged on the outlet side of each discharge port 14.

A first discharge chamber 16 into which a refrigerant gas discharged from each compression chamber 13 via a discharge port 14 and a discharge valve 15 is introduced is formed between the cylinder 1 and each discharge valve cover 5. . A discharge passage 1b communicating with each of the first discharge chambers 16 is provided at a substantially symmetrical position in the circumferential direction of the cylinder 1. Discharge passages 2a, which communicate with the respective discharge passages 1b, are provided in pairs at substantially symmetrical positions in the circumferential direction of the front side block 2.

As shown in FIGS. 1 and 2, two bag-shaped muffler chambers 20 into which the refrigerant gas discharged from each pair of discharge passages 2a enters.
Are integrally provided on the front head 8.
The two muffler chambers 20 are provided at substantially symmetrical positions in the circumferential direction corresponding to the pair of discharge passages 2a, that is, at positions facing each other with the boss portion 8b interposed therebetween.

Each wall portion 21 forming each muffler chamber 20 is provided with a cutout portion (communication port) 22 for communicating the muffler chamber 20 with the second discharge chamber 11 for oil separation. Each notch 22 has a boss 8b
The refrigerant gas, which is formed at positions opposite to each other across the muffler chamber 20 and passes through each notch 22 and is discharged into the second discharge chamber 11, is discharged above the boss portion 8b and is 90 ° or more. Each of the wall portions 21 is formed so as to face upward so as to collide with each other.

The operation of the above embodiment will be described below.

The refrigerant gas compressed in each compression chamber 13 is discharged into the first discharge chamber 16 through the discharge port 14 and the discharge valve 15, and further passes through each discharge passage 1b and each pair of discharge passages 2a. Enter each muffler room 20.

When the refrigerant gas discharged through the pair of discharge passages 2a enters each muffler chamber 20, the pulsation of the refrigerant gas is reduced inside the compressor, and as a result, the compression generated by the pulsation of the refrigerant gas is generated. Vibration of internal parts of the machine is reduced.

The refrigerant gas that has entered each muffler chamber 20 is discharged through each notch 22 into the second discharge chamber 11 toward the upper side of the boss portion 8b as shown by the arrow A in FIG. Collide at an angle of more than °. Due to the collision of the refrigerant gases, the oil contained in the refrigerant gases is separated and dripped, and the dripped oil accumulates at the bottom of the compressor as shown in FIGS. 1 and 3. On the other hand, the refrigerant gas from which the oil has been separated is discharged from the discharge port 8a into the refrigeration circuit (not shown).

According to the above-described embodiment, the wall portions 21 forming the muffler chambers 20 are formed integrally with the front head 8, so that the vibration of the front head 8 due to the pulsation of the refrigerant gas can be suppressed. Is obtained.

Further, in the above embodiment, the muffler chamber 20 is provided integrally with the front head 8, but the muffler chamber 20 may be provided integrally with the front side block 2.

Further, in the above embodiment, by increasing the wall thickness of the wall portion 21 of the muffler chamber 20 to increase the passage length of the notch (communication port 22), the inside of the second discharge chamber 11 from each muffler chamber 20 can be increased. The refrigerant gases discharged to each other can be made to collide with each other more reliably, so that the oil can be separated more reliably.

(Effects of the Invention) As described in detail above, according to the vane compressor of the present invention, the refrigerant gas discharged from each of the compression chambers passes through the discharge passage of the one side block before colliding with each other. By passing through both muffler chambers, the pulsation at the time of discharging the refrigerant gas is efficiently reduced inside the compressor, so the vibration of the internal parts of the compressor caused by the pulsation at the time of discharging the refrigerant gas is efficiently performed. It can be reduced and quietness is improved.

Further, since the refrigerant gas that has entered both muffler chambers flows into the discharge chamber through the communication port and collides at an angle of 90 degrees or more, the oil contained in the refrigerant gas can be efficiently separated.

In addition, the muffler chamber is provided on the existing one side block or one side head, and a communication port for colliding the refrigerant gas entering both muffler chambers in the discharge chamber is formed by the wall portion forming both muffler chambers. Since it is provided in the above, it is not necessary to provide parts for reducing pulsation during discharge of the refrigerant gas and parts such as a pipe for oil separation, the number of parts can be reduced, and the size and weight are small, which is suitable for vehicles. It is possible to obtain a vane type compressor which is available at low cost.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a plan view of the front head as seen from the inside, and FIG. 2 is an enlarged perspective view of the muffler chamber of FIG. FIG. 3 is a vertical sectional view showing the vane type compressor, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1 ... Cylinder, 2, 3 ... Side block, 2a ... Discharge passage, 6 ... Rotor, 8 ... Front head (one side head), 11 ... Second discharge chamber for oil separation (Discharge chamber) ),
13 ... compression chamber, 20 ... muffler chamber, 21 ... wall, 22 ... notch (communication port).

Claims (1)

[Scope of utility model registration request] 1. A pair of compression chambers defined between a cylinder whose both end faces are closed by side blocks and a rotor rotating in the cylinder, and a side block on one side and the end faces of the side blocks. And a discharge chamber defined by the head on one side, and the refrigerant gas discharged from both compression chambers is discharged through the discharge passages corresponding to the compression chambers of the one side block. In the vane type compressor configured to be discharged into the chamber, a pair of muffler chambers into which the refrigerant gas that is compressed in each of the compression chambers and discharged from each of the discharge passages enters is connected to the one side block or the one side block. The muffler chamber and the wall portion forming both muffler chambers, the refrigerant gas discharged from the both muffler chambers into the discharge chamber collides at an angle of 90 degrees or more with the muffler chambers Vane compressor, characterized in that a communicating port for communicating the outlet chamber.