JP2012017689A - Vane rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vane rotary compressor that produces low noise and has high merchantability.SOLUTION: The vane rotary compressor includes: a cylinder 3; a rotor 4 provided in the cylinder; and a vane 5 which is inserted into a vane grove 4b of the rotor 4, whose end contacts the inner wall surface of the cylinder 3, and which partitions a compression space that is mutually formed between the cylinder 3 and the rotor 4 into at least an intake space 17 and a discharge space 18. The vane rotary compressor includes an intake hole 9 communicated with the intake space 17 and a discharge hole 10 communicated with the discharge space 18. A permanent magnet 6a and a permanent magnet 6b having the same magnetic property are provided in a vane rear part 5a and a vane groove rear wall part 4c, respectively, wherein magnetic repulsion reduces a contact part between the vane 5 and the rotor 4, and the sliding resistance of the vane 5, and moreover assists protrusion of the vane 5. Accordingly, the vane 5 can stably contact the inner wall of the cylinder 3, thereby providing the compressor of high quietness.

Description

  The present invention relates to a compressor that compresses a gas fluid, and relates to a vane rotary type compressor used in, for example, an automobile air conditioner.

  Conventionally, this type of vane rotary compressor for a vehicle rotates a pulley of an electromagnetic clutch via a belt by a driving force of an engine and performs a compression operation by turning on / off the electromagnetic clutch. 4 and 5 show a conventional vane rotary compressor described in Patent Document 1. FIG. As shown in FIG. 5, the vane rotary compressor has a cylinder 51, a rotor 52, a vane groove 53 formed in the rotor 52, a vane 54, a suction hole 55, a working chamber 56, and a discharge hole 57. And a discharge valve 58 and the like.

  When the electromagnetic clutch is turned on, the rotor 52 rotates and gas or oil is supplied from the rear case 61 to the vane groove 53 through the back pressure applying device 62. As a result, the pressure in the vane groove 53 increases, and the vane 54 jumps out of the vane groove 53 of the rotor 52, and the vane tip collides with the cylinder inner surface 59. Thereafter, the tip of the vane 54 is inscribed in the cylinder inner surface 59 and rotates together with the rotor 52 to compress the refrigerant in the working chamber 56, and the compressed refrigerant is discharged from the discharge hole 57 (see, for example, Patent Document 1). .

Japanese Patent Laid-Open No. 2003-090286

  In the conventional configuration, gas or oil is supplied from the rear case 61 through the back pressure applying device 62 to hold pressure on the back portion of the vane groove 53 portion. Therefore, in the case of the above-described conventional configuration, at the time of starting the compressor, a supply delay of gas or oil occurs in the vane groove 53 portion, the vane is delayed, and chattering may occur. Further, when the high-pressure refrigerant in the working chamber 56a in front of the vane 54a is discharged near the discharge hole 57, the pressure balance between the working chamber 56a and the working chamber 56b before and after the vane 54a changes, and therefore the chatter in which the vane 54a repeatedly appears and disappears. May cause a ring.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a vane rotary compressor that prevents chattering and has high commercial properties.

  In order to solve the above-described conventional problems, the present invention includes a cylinder having a cylindrical hollow portion therein, and at least a part of an outer peripheral portion disposed so as to be rotatable close to the inner wall surface of the cylinder. A cylindrical rotor, a slidably inserted into a vane groove of the rotor, a tip abuts against the inner wall surface of the cylinder, and at least a suction space and a discharge space formed between the cylinder and the rotor. A vane rotary compressor that includes a vane that is partitioned into two sides, a front side plate and a rear side plate that form a compression chamber by closing both ends of the cylinder, a suction hole that communicates with the suction space, and a discharge hole that communicates with the discharge space. Permanent magnets are provided at positions corresponding to the rear part of the vane and the rear wall of the vane groove of the rotor, respectively, and the permanent magnet of the rear part of the vane and the permanent magnet of the rear wall of the vane groove have the same magnetism. It is constituted.

  As a result, the vane groove inner wall and the vane repel each other due to the repulsion of the magnet with the same magnetism, reducing the sliding resistance when the vane jumps out, the vane out delay due to the gas or oil supply delay does not occur, and the vane chattering A vane rotary compressor that is unlikely to occur and has high commercial properties can be provided.

  INDUSTRIAL APPLICABILITY The present invention can provide a vane rotary type compressor that prevents chattering and has a high commercial value.

1 is a cross-sectional view of a vane rotary compressor according to Embodiment 1 of the present invention. Working room sectional view of the vane rotary type compressor in Embodiment 1 Detailed view of part A in FIG. Cross-sectional view of a conventional vane rotary compressor EE sectional view of FIG.

  According to a first aspect of the present invention, there is provided a cylinder having a cylindrical hollow portion therein, a substantially cylindrical rotor in which at least a part of an outer peripheral portion is rotatably disposed close to an inner wall surface of the cylinder, and the rotor A vane that is slidably inserted into the vane groove of the cylinder, has a tip abutting against the inner wall surface of the cylinder, and divides a compression space formed between the cylinder and the rotor into at least a suction space and a discharge space, and both ends of the cylinder A vane rotary compressor comprising a front side plate and a rear side plate constituting a compression chamber, a suction hole communicating with the suction space, and a discharge hole communicating with the discharge space, the rear portion of the vane and the A permanent magnet is provided at a position corresponding to the vane groove rear wall portion of the rotor, and the permanent magnet on the rear portion of the vane and the permanent magnet on the rear wall of the vane groove have the same magnetism. Noncontact portion by each other reduces sliding resistance increases, contact quickly the cylinder inner wall of the vane, it is possible to prevent chattering, it is possible to provide a highly merchantability compressor quiet.

  According to a second aspect of the present invention, in the vane rotary compressor according to the first aspect, the permanent magnet provided in the vane groove is disposed so as to surround the vane, and the back pressure for contacting the vane to the cylinder is provided. Can be reinforced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a transverse sectional view of a vane rotary type compressor according to Embodiment 1 of the present invention, FIG. 2 is a sectional view of a working chamber of the compressor, and FIG. 3 is a detailed view of part A in FIG. .

  As shown in FIGS. 1 and 2, the working chamber 7 for compressing the refrigerant in the vane rotary compressor of the present invention is closed and fixed by the front side plate 1 and the rear side plate 2, and is compressed with the refrigerant suction hole 9. A refrigerant discharge hole 10 is provided. Further, the discharge hole 10 communicates with a high pressure portion 12 provided in the rear case 11 through a passage. In the rear case 11, a separation device (not shown) for separating the lubricating oil from the compressed refrigerant, an oil storage chamber 16, and a back pressure applying device 13 are provided.

As shown in FIG. 2, the working chamber 7 includes a cylinder 3 having a cylindrical hollow portion inside, and at least a part of the outer peripheral portion provided in the cylinder 3 is rotatable close to the inner wall surface of the cylinder 3. A substantially cylindrical aluminum rotor 4 is provided. The rotor 4 has a plurality of vane grooves 4b substantially radially, and vanes 5 are slidably inserted into the vane grooves 4b. The vane 5 has a vane 5 whose tip abuts against the inner wall surface of the cylinder 3 and partitions the compression space formed between the cylinder 3 and the rotor 4 into at least a suction space and a discharge space. A suction hole 9 communicating with the suction space 17 is provided on the suction side of the working chamber 7, and a discharge hole 10 and a discharge valve 8 communicating with the discharge space 18 are provided on the discharge side.

  Further, as shown in FIG. 1, a back pressure applying device 13 is provided in the rear case 11. The back pressure applying device 13 is fixed to the rear side plate 2 and appropriately switches between the compressed refrigerant that has become a high-pressure gas fluid in the high-pressure portion 12 and the lubricating oil that has accumulated in the oil storage chamber 16, from the oil supply passage to the oil groove 14. The back pressure is applied to the vane groove 4b. The back pressure applying device 13 controls the communication and blocking operation of a valve mechanism including a ball valve and a ball seat based on a pressure difference between the suction space 17 or the discharge space 18 in the working chamber 7 and the high pressure portion 12 or the oil storage chamber 16. Thus, the necessary back pressure is applied, and the vane 5 is reliably pressed against the cylinder 3.

  Further, as shown in FIGS. 2 and 3, a permanent magnet 6a is installed in the vane rear portion 5a of the vane rotary compressor of the present embodiment, and a permanent magnet 6b of the same magnetic property is installed in the vane groove rear wall portion 4c. . As can be understood from FIG. 3, the permanent magnet 6 a provided on the vane 5 is embedded in the rear wall of the vane with the south pole and the north pole bonded together. The permanent magnet 6b provided in the vane groove 4b is provided on the inner peripheral surface of the vane groove so that the S pole of the vane 5 is opposed to the S pole, and the N pole is located in the part facing the N pole. The vane rear portion 5a is disposed so as to surround the vane rear portion 5a.

  About the vane rotary compressor comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  When the electromagnetic clutch is turned on and the compressor is started, the rotor 4 connected to the drive shaft 4a starts to rotate, the refrigerant is sucked into the working chamber 7, and the refrigerant is compressed.

  At this time, in order to press the vane 5 against the inner wall surface of the cylinder 3, it is necessary to supply lubricating oil or refrigerant to the vane groove 4b by the back pressure applying device 13, but the pressure difference is small as at the time of start-up, Even when the amount of lubricating oil or refrigerant supplied to the vane groove 4b is small, according to the configuration using the permanent magnets 6a and 6b of the present invention, the vane 5 floats due to the magnetic force of the magnet, and the cylinder 3 has no sliding resistance. I will go out. Further, since the magnets are forced to abut against the inner peripheral surface of the cylinder 3 due to the repulsion of the magnets, there is no occurrence of vane delay or chattering.

  In addition, since the permanent magnet 6b provided in the vane groove 4b is arranged so as to surround the vane 5, a magnet repulsive force can be applied to the rear portion of the vane 5 over the entire outer peripheral surface thereof. The back pressure for contacting the cylinder can be reinforced.

  As described above, the vane rotary compressor according to the present embodiment can reliably press the vane 5 against the inner wall surface of the cylinder 3 even at the time of start-up, so that the vane is not easily delayed and the back pressure is reduced. Since chattering can be prevented from occurring even when the amount is insufficient, it is possible to provide a quiet and highly productive compressor.

  In addition, the installation method of the permanent magnet 6 to the vane 5 is not limited to the shape shown in FIGS. 2 and 3, and the vane 5 itself may be made of a permanent magnet.

Further, in the present embodiment, the back pressure applying device 13 is used to apply the back pressure to the vane 5, but the sliding resistance due to the magnetic force of the magnet is eliminated as in the present invention, and the pressing force is used. Then, there is a possibility that the back pressure applying device 13 is unnecessary or can be realized with a simple configuration.

  As described above, the vane rotary type compressor according to the present invention can provide a vane rotary type compressor with low noise and high merchantability, and can also be applied to uses such as compressors for automobile air conditioners.

DESCRIPTION OF SYMBOLS 1 Front side plate 2 Rear side plate 3 Cylinder 4 Rotor 4a Drive shaft 4b Vane groove 4c Vane groove rear wall part 5 Vane 5a Vane rear part 6a, 6b Permanent magnet 7 Working chamber 8 Discharge valve 9 Suction hole 10 Discharge hole 11 Rear case 12 High pressure Part 13 Back pressure applying device 14 Oil groove 15 Communication hole 16 Oil storage chamber 17 Suction space 18 Discharge space

Claims (2)

A cylinder having a cylindrical hollow portion therein, a substantially cylindrical rotor in which at least a part of the outer peripheral portion is rotatably disposed near the inner wall surface of the cylinder, and a slide in a vane groove of the rotor A vane that is movably inserted, has a tip abutting against the inner wall surface of the cylinder, partitions a compression space formed between the cylinder and the rotor into at least a suction space and a discharge space, and closes both ends of the cylinder to close the compression chamber. A vane rotary compressor having a front side plate and a rear side plate, a suction hole communicating with the suction space, and a discharge hole communicating with the discharge space, the rear portion of the vane and the rear wall of the vane groove of the rotor A vane rotary type compressor in which a permanent magnet is provided at a position corresponding to a portion, and the permanent magnet on the rear portion of the vane and the permanent magnet on the rear wall of the vane groove have the same magnetism. 2. The vane rotary compressor according to claim 1, wherein the permanent magnet provided in the vane groove is disposed so as to surround the rear portion of the vane.